Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.
The systematic study of the complete complement of proteins (PROTEOME) of organisms.
Measurable and quantifiable biological parameters (e.g., specific enzyme concentration, specific hormone concentration, specific gene phenotype distribution in a population, presence of biological substances) which serve as indices for health- and physiology-related assessments, such as disease risk, psychiatric disorders, environmental exposure and its effects, disease diagnosis, metabolic processes, substance abuse, pregnancy, cell line development, epidemiologic studies, etc.
An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.
Separation technique in which the stationary phase consists of ion exchange resins. The resins contain loosely held small ions that easily exchange places with other small ions of like charge present in solutions washed over the resins.
Chromatographic techniques in which the mobile phase is a liquid.
A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.
Books used in the study of a subject that contain a systematic presentation of the principles and vocabulary of a subject.
That portion of the electromagnetic spectrum from the UHF (ultrahigh frequency) radio waves and extending into the INFRARED RAYS frequencies.
The resistance to the flow of either alternating or direct electrical current.
Recording changes in electrical impedance between electrodes placed on opposite sides of a part of the body, as a measure of volume changes in the path of the current. (Stedman, 25th ed)
The ability of a substrate to retain an electrical charge.
The aggregation of suspended solids into larger clumps.
Characteristics of ELECTRICITY and magnetism such as charged particles and the properties and behavior of charged particles, and other phenomena related to or associated with electromagnetism.
The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A vinyl polymer made from ethylene. It can be branched or linear. Branched or low-density polyethylene is tough and pliable but not to the same degree as linear polyethylene. Linear or high-density polyethylene has a greater hardness and tensile strength. Polyethylene is used in a variety of products, including implants and prostheses.
Synthetic thermoplastics that are tough, flexible, inert, and resistant to chemicals and electrical current. They are often used as biocompatible materials for prostheses and implants.
Polymers of ETHYLENE OXIDE and water, and their ethers. They vary in consistency from liquid to solid depending on the molecular weight indicated by a number following the name. They are used as SURFACTANTS, dispersing agents, solvents, ointment and suppository bases, vehicles, and tablet excipients. Some specific groups are NONOXYNOLS, OCTOXYNOLS, and POLOXAMERS.
Endogenous factors or drugs that increase the transport and metabolism of LIPIDS including the synthesis of LIPOPROTEINS by the LIVER and their uptake by extrahepatic tissues.
The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Oils which evaporate readily. The volatile oils occur in aromatic plants, to which they give odor and other characteristics. Most volatile oils consist of a mixture of two or more TERPENES or of a mixture of an eleoptene (the more volatile constituent of a volatile oil) with a stearopten (the more solid constituent). The synonym essential oils refers to the essence of a plant, as its perfume or scent, and not to its indispensability.

Induction of AT-specific DNA-interstrand crosslinks by bizelesin in genomic and simian virus 40 DNA. (1/999)

Bizelesin is a bifunctional AT-specific DNA alkylating drug. Our study characterized the ability of bizelesin to induce interstrand crosslinks, a potential lethal lesion. In genomic DNA of BSC-1 cells, bizelesin formed from approx. 0.3 to 6.03+/-0.85 interstrand crosslinks per 106 base pairs, at 5-100 nM drug concentration, respectively, comparable to the number of total adducts previously determined in the same system (J.M. Woynarowski, M.M. McHugh, L.S. Gawron, T.A. Beerman, Biochemistry 34 (1995) 13042-13050). Bizelesin did not induce DNA-protein crosslinks or strand breaks. A model defined target, intracellular simian virus 40 (SV40) DNA, was employed to map at the nucleotide level sites of bizelesin adducts, including potential interstrand crosslinks. Preferential adduct formation was observed at AT tracts which are abundant in the SV40 matrix associated region and the origin of replication. Many sites, including each occurrence of 5'-T(A/T)4A-3', co-mapped on both DNA strands suggesting interstrand crosslinks, although monoadducts were also formed. Bizelesin adducts in naked SV40 DNA were found at similar sites. The localization of bizelesin-induced crosslinks in AT-rich tracts of replication-related regions is consistent with the potent anti-replicative properties of bizelesin. Given the apparent lack of other types of lesions in genomic DNA, interstrand crosslinks localized in AT-rich tracts, and to some extent perhaps also monoadducts, are likely to be lethal effects of bizelesin.  (+info)

Separation and properties of two acetylacetoin reductases from Bacillus cereus YUF-4. (2/999)

The separation and purification of two kinds of acetylacetoin reductases (AACRs) from Bacillus cereus YUF-4 were examined. NADPH-linked AACR (AACR I) and NADH-linked AACR (AACR II) were separated from each other by ammonium sulfate fractionation, DEAE-cellulose chromatography, and hydroxyapatite chromatography. The former was purified 3.4-fold with a yield of 10.0%, and the latter was purified 29-fold with a yield of 15.6%. The two enzymes differ from each other in some enzymic properties such as substrate specificity.  (+info)

Two types of HTLV-1 particles are released from MT-2 cells. (3/999)

The MT-2 cell line transformed by human T-cell leukemia virus type 1 (HTLV-1) contains one complete provirus and seven defective proviruses. Four defective genomes have an identical structure (LTR-MA-deltaCA-pX-LTR) with an open reading frame that spans from MA to pX, giving rise to a 3.4-kb (24S) RNA transcript encoding a chimeric Gag-pX protein, p28. MT-2 cells release two distinct types of virions. The major "classic" type of particle has a buoyant density of 1.155-1.16 g/cm3 and contains the standard HTLV-I structural proteins and reverse transcriptase (RT). In addition, about 5% of particles are "light," approximately 1.12 g/cm3, and contain p28, RT activity, and the 3.4-kb RNA transcript. RT-PCR and in vitro translation indicate that some of the classic HTLV-1 particles package 3.4-kb RNA as well as full-length 8.5-kb RNA. In addition to matrix features, the p28 protein has a motif resembling a zinc finger at the C-terminal, pX0 region, which may play a role in the assembly of the defective light virions.  (+info)

Localization of a candidate surfactant convertase to type II cells, macrophages, and surfactant subfractions. (4/999)

Pulmonary surfactant exists in the alveolus in several distinct subtypes that differ in their morphology, composition, and surface activity. Experiments by others have implicated a serine hydrolase in the production of the inactive small vesicular subtype of surfactant (N. J. Gross and R. M. Schultz. Biochim. Biophys. Acta 1044: 222-230, 1990). Our laboratory recently identified this enzyme in the rat as the serine carboxylesterase ES-2 [F. Barr, H. Clark, and S. Hawgood. Am. J. Physiol. 274 (Lung Cell. Mol. Physiol. 18): L404-L410, 1998]. In the present study, we determined the cellular sites of expression of ES-2 in rat lung using a digoxygenin-labeled ES-2 riboprobe. ES-2 mRNA was localized to type II cells and alveolar macrophages but not to Clara cells. Using a specific ES-2 antibody, we determined the protein distribution of ES-2 in the lung by immunohistochemistry, and it was found to be consistent with the sites of mRNA expression. Most of the ES-2 in rat bronchoalveolar lavage is in the surfactant-depleted supernatant, but ES-2 was also consistently localized to the small vesicular surfactant subfraction presumed to form as a consequence of conversion activity. These results are consistent with a role for endogenous lung ES-2 in surfactant metabolism.  (+info)

Inhibition of protein denaturation by fatty acids, bile salts and other natural substances: a new hypothesis for the mechanism of action of fish oil in rheumatic diseases. (5/999)

Natural hydrophobic substances like bile salts (cholate, deoxycholate, chenodeoxycholate, lithocholate and their conjugates with glycine and taurine), fatty acids (caprylic, capric, lauric, myristic, palmitic, stearic, oleic, linoleic, arachidonic, eicosapentaenoic and docosahexaenoic acid) were much more active (EC50 approximately 10(-4)-10(-5) M) than selected amino acids (EC50 > 10(-2) M) and inorganic salts (EC50 approximately 10(-1) M) in inhibiting heat-induced denaturation of human serum albumin in vitro. Fish oil, rich in n-3-polyunsaturated acids such as eicosapentaenoic acid and docosahexaenoic acid, administered p.o. (1 ml/kg) in the rat, protected ex vivo (after 2 hr) serum against heat-induced denaturation more than bendazac, a known antidenaturant drug. Thus, we speculated that the antidenaturant activity of fish oil may be partly (in addition to the known effect on endogenous eicosanoid composition) responsible for its beneficial effects in rheumatoid arthritis and other rheumatic conditions. In this connection, it is of note that the in vitro antidenaturant activity of fish oil fatty acids was higher than that of known antidenaturant drugs such as bendazac and bindarit and nonsteroidal anti-inflammatory drugs like phenylbutazone and indomethacin which could exert beneficial effects in chronic inflammatory conditions by stabilizing endogenous proteins.  (+info)

European interlaboratory comparison of breath 13CO2 analysis. (6/999)

The BIOMED I programme Stable Isotopes in Gastroenterology and Nutrition (SIGN) has focused upon evaluation and standardisation of stable isotope breath tests using 13C labelled substrates. The programme dealt with comparison of 13C substrates, test meals, test conditions, analysis techniques, and calculation procedures. Analytical techniques applied for 13CO2 analysis were evaluated by taking an inventory of instrumentation, calibration protocols, and analysis procedures. Two ring tests were initiated measuring 13C abundances of carbonate materials. Evaluating the data it was found that seven different models of isotope ratio mass spectrometers (IRMS) were used by the participants applying both the dual inlet system and the continuous flow configuration. Eight different brands of certified 13C reference materials were used with a 13C abundance varying from delta 13CPDB -37.2 to +2.0/1000. CO2 was liberated from certified material by three techniques and different working standards were used varying from -47.4 to +0.4/1000 in their delta 13CPDB value. The standard deviations (SDs) found for all measurements by all participants were 0.25/1000 and 0.50/1000 for two carbonates used in the ring tests. The individual variation for the single participants varied from 0.02 /1000 (dual inlet system) to 0.14/1000 (continuous flow system). The measurement of the difference between two carbonates showed a SD of 0.33/1000 calculated for all participants. Internal precision of IRMS as indicated by the specifications of the different instrument suppliers is < 0.3/1000 for continuous flow systems. In this respect it can be concluded that all participants are working well within the instrument specifications even including sample preparation. Increased overall interlaboratory variation is therefore likely to be due to non-instrumental conditions. It is possible that consistent differences in sample handling leading to isotope fractionation are the causes for interlaboratory variation. Breath analysis does not require sample preparation. As such, interlaboratory variation will be less than observed for the carbonate samples and within the range indicated as internal precision for continuous flow instruments. From this it is concluded that pure analytical interlaboratory variation is acceptable despite the many differences in instrumentation and analytical protocols. Coordinated metabolic studies appear possible, in which different European laboratories perform 13CO2 analysis. Evaluation of compatibility of the analytical systems remains advisable, however.  (+info)

Lipopolysaccharides (LPS) of oral black-pigmented bacteria induce tumor necrosis factor production by LPS-refractory C3H/HeJ macrophages in a way different from that of Salmonella LPS. (7/999)

Some lipopolysaccharide (LPS) preparations from S- or R-form members of the family Enterobacteriaceae and oral black-pigmented bacteria (Porphyromonas gingivalis and Prevotella intermedia) are known to activate LPS-refractory C3H/HeJ macrophages. When contaminating proteins are removed from R-form LPS of Enterobacteriaceae by repurification, however, this ability is lost. In the present study, we investigated the capacity of LPS from P. gingivalis, P. intermedia, Salmonella minnesota, and Salmonella abortusequi to induce production of tumor necrosis factor (TNF) in gamma interferon-primed C3H/HeJ macrophages before and after repurification. P. abortusequi S-LPS was fractionated by centrifugal partition chromatography into two LPS forms: SL-LPS, having homologous long O-polysaccharide chains, and SS-LPS having short oligosaccharide chains. Prior to repurification, all LPS forms except SL-LPS induced TNF production in both C3H/HeJ and C3H/HeN macrophages. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis showed that repurification removed contaminating protein from the preparations, and repurified SS-LPS and S. minnesota Ra-LPS no longer stimulated TNF production in C3H/HeJ macrophages, although C3H/HeN macrophages remained responsive. In contrast, repurified oral bacterial LPS retained the capacity to induce TNF production in C3H/HeJ macrophages. Oral bacterial LPS preparations also were not antagonized by excess inactive, repurified SL-LPS; Ra-LPS; Rhodobacter sphaeroides lipid A, a competitive LPS antagonist, or paclitaxel, an LPS agonist, and they were comparatively resistant to polymyxin B treatment. Nevertheless, oral bacterial LPS was less toxic to D-galactosamine-treated C3H/HeN mice than was LPS from Salmonella. These findings indicate that the active molecule(s) and mode of action of LPS from P. gingivalis and P. intermedia are quite different from those of LPS from Salmonella.  (+info)

Characterization of a novel trypanosome lytic factor from human serum. (8/999)

Natural resistance of humans to the cattle pathogen Trypanosoma brucei brucei has been attributed to the presence in human serum of nonimmune factors that lyse the parasite. Normal human serum contains two trypanosome lytic factors (TLFs). TLF1 is a 500-kDa lipoprotein, which is reported to contain apolipoprotein A-I (apoA-I), haptoglobin-related protein (Hpr), hemoglobin, paraoxonase, and apoA-II, whereas TLF2 is a larger, poorly characterized particle. We report here a new immunoaffinity-based purification procedure for TLF2 and TLF1, as well as further characterization of the components of each purified TLF. Immunoaffinity-purified TLF1 has a specific activity 10-fold higher than that of TLF1 purified by previously described methods. Moreover, we find that TLF1 is a lipoprotein particle that contains mainly apoA-I and Hpr, trace amounts of paraoxonase, apoA-II, and haptoglobin, but no detectable hemoglobin. Characterization of TLF2 reveals that it is a 1,000-kDa protein complex containing mainly immunoglobulin M, apoA-I, and Hpr but less than 1% detectable lipid.  (+info)

This paper presents the extraction of cations from a soil sample, type ranker on serpentinite, in deionized water, by use of three different extraction techniques. The first extraction technique included the use of a rotary mixer, the second technique involved the use of a microwave digestion system with different extraction temperatures, and the third technique employed an ultrasonic bath with different extraction times. Ion chromatography was used for determining the concentration of Li, Na, K, Ca, Mg and ammonium ions in soil extracts with subsequent determination of concentrations for all cations, except for ammonium ion extraction, conducted by Inductively Coupled Plasma-Atomic Emission Spectrometry. The results of cation extractions showed that microwave assisted extraction was most efficient for the Li, Na, K, Ca, Mg, Co, Mn, Ni, Pb and ammonium ions. Use of a rotary mixer for extraction was most efficient for Cd and Zn ions, while use of ultrasound bath was most efficient for Cr, Cu, Fe ...
The Bel Art Scienceware Spinbar® Octagon magnetic spin bars, Spinbar® Round magnetic spinbars, Spinbar® Polygon magnetic spin pars, Flea Micro magnetic spin bars, Spinbar Egg Shaped or Oval magnetic spin bars and Spin bar Disposable magnetic Stir Bars are the most popular magnetic stirring bars and are available in the widest selection of sizes, for general magnetic stirring. Rose Scientific has magnetic stir bars for every application, including general magnetic stirring, high temperature stirring, viscous solutions or high speed stirring, abrasive slurries or extended stirring, stirring in large containers, stirring in small test tubes and gentle stirring in tissue culture applications. Octagon spin bars have an octagonal cross-section, polygon spin bars have a polygonal cross-section, and round spin bars have a round cross-section. Teflon PTFE construction or coating and Alnico encapsulated magnets.
Concerned about Mykaylas stomach cramps Krenzler who lives in Portland Oregon sent a sample of the oil off to Going Green Labs in Albany Oregon. Like most labs catering to the cannabis industry Going Green mainly performs THC potency tests. According to Krenzler when the lab tested his sample it found that the Real Scientific Hemp Oil contained much more THC than HempMedsPx had claimed?3.8 percent instead of roughly 1 percent. Hemp Oil Ibs krenzler said he was disturbed? by the finding and also by the implications it had for other parents of sick children.. The oil will feel dry to the touch one day after the Hemp Oil Ibs initial application however complete drying can be several days. For example if there is too much oil initially applied then small amounts of oil may rise over the first few days. This can be avoided by wiping the excess away with a cloth. If used on a floor during this time it is recommended to place some cardboard pieces where there will be a lot of foot traffic. Dirty shoes ...
ProteinSafe™ Protease Inhibitor Cocktail (100×),Protein Extraction,Protein Extraction, Purification and Detection,Products,Beijing TransGen Biotech Co.Ltd,OverviewContents& storageCitations & referencesRelated ImagesDownloadOverviewDescriptionP
Description. Protein stability is fundamental to all aspects of protein research, including analysis by Western blotting. Combine our gentle protein extraction kits with protease inhibitors to obtain stabilized, intact and active proteins.. BugBuster® Master Mix combines BugBuster Protein Extraction Reagent with Benzonase®Nuclease and rLysozyme™ Solution in one convenient reagent. BugBuster Master Mix allows for maximum recovery of active soluble protein from both Gram-negative and Gram-positive bacteria. With the Master Mix, there is no need for dilution or separate addition steps. The two available package sizes provide sufficient reagents for protein extraction from 20 g and 100 g cell paste. ...
Place two table spoons of sand into a beaker, add about double the amount of water and add a similar amount of MgCl2 solution. Gently shake the beaker to mix the solution well with the sand, and leave for about 5 minutes. Stir up the sand again, washing the animals into the supernatant, and decant the liquid through a net and pour the water back onto the sand sample. The optimal net size depends in the species and sediment (small nets catch smaller worms, but also more sediment). Place the net into a Petri dish with seawater only, so that the worms can recover from the anesthetic, and check for worms under the dissecting microscope, both on top and below the net, and move them into small Petri dishes. You can repeat the washing of the same sand sample a couple of times, but dont leave it for too long, as the anesthetic will eventually damage the worms (for some papers on different extraction methods see the bottom of this page).. ...
of course, you can fractionize proteins by sucrose density ultracentrifugation; it works best for pre-purified fractions and macromolecular proteins f.i. oligomeric proteins or large fibrillar proteins. ...
I work on an uropathogenic strain of E.coli. When I artificially express from a plasmid one of the transcriptional regulator, it results in secretion of a protein factor in the media, which has interesting biological roles. My aim is to purify this unknown factor present in the growth media and to identify it by Mass Spec ...
Tätä artikkelia/julkaisua ei ole tallennettu Jukuriin. Julkaisun tiedoissa voi kuitenkin olla linkki toisaalle tallennettuun artikkeliin/julkaisuun. ...
Stir bars - it was the stirring bars all along. Thats the take-home from this paper, which shows definitively that (A) you cannot truly clean one of the things
Stir bars - it was the stirring bars all along. Thats the take-home from this paper, which shows definitively that (A) you cannot truly clean one of the things
SoluLyse protein extraction reagents are optimized for the most efficient extraction of soluble proteins from bacterial and mammalian cells.
RMBIO manufactures custom orders to clients in need of specialized material. With our high tech facility, we can make a diverse range of extraction. Clients typically provide the raw materials for processing, and we deliver a final product that meets specifications agreed on at the start.
Close The Infona portal uses cookies, i.e. strings of text saved by a browser on the users device. The portal can access those files and use them to remember the users data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser. ...
Micron-size polystyrene-based latex particles were separated by using new micro-thermal field-flow fractionation (micro-TFFF). The order of retention from the largest to the smallest particles that appears at high field strength and high flow rate corresponds to the focusing mechanism which itself is a consequence of the lift forces acting on the particles. The mechanism of steric exclusion can only be effective at low flow rates of the carrier liquid. Whenever high-speed separation was performed, the focusing effect clearly dominated the FFF mechanism. This application of micro-TFFF in focusing mode to the separation of the particles is the first one published. As a result, micro-TFFF thus became a very universal technique for the separation of synthetic and natural macromolecules and of particles of various origin and size up to large (micron-size) diameter. ,p, ...
Online Miniaturized Asymmetrical Flow Field-Flow Fractionation and Inductively Coupled Plasma Mass Spectrometry for Metalloprotein Analysis of Plasma from Patients with Lung Cancer
Abstract Melanin involves in various biological functions, widely used in cosmetic, pharmacology medicine and other felds. However, melanin application is limited due to low productivity and high cost. In this work, melanin extraction method from rapeseed meal (RSM) was explored. Effects of hydrochloric acid (HCl) concentration, ethanol concentration, extraction temperature and time, and solid-liquid ratio were evaluated systematically. According to results of single factor experiment and Box-Behnken experiment, the optimum extraction conditions of melanin from RSM were as follows: HCl concentration, 0.5 mol/L; ethanol concentration, 70%; extraction temperature, 40oC; extraction time, 1 h; solid liquid ratio, 1/4 g/mL. Under these conditions, extraction yields of crude melanin(CM) and purifed melanin (PM) were 9.00% and 1.44%, respectively. Compared with synthetic melanin (SM) from Sigma, the relative purities of CM and PM were 7.82% and 29.57%, respectively. Moreover, feedstuff value of RSM ...
Volatile and semi-volatile compounds were extracted by stir bar sorptive extraction from watermelon puree and headspace obtained from 4 different varieties. Analysis was conducted by gas chromatography mass spectrometry. More than 36 compounds were detected. 10 were positively identified with authentic standard confirmation. The compound present in greatest abundance varied according to variety.. .no-margin li {margin: 0!important;} ...
Extractables and Leachables Analysis of IV Bag Systems using Direct Thermal Extraction of the Materials and Stir Bar Sorptive Extraction of Aqueous Solutions coupled with Thermal Desorption Gas-Chromatography with Unit Mass and High Resolution Mass Spectrometric ...
A Novel Extraction Precedure for Stir Bar Sorptive Extraction (SBSE): Sequential SBSE for Uniform Enrichment of Organic Pollutants in Water ...
Stir Bar Sorptive Extraction is the primary technique for beer and wine flavor and aroma analysis. Heres a new multi-SBSE method to improve results.
In recent months the movement to embrace hemp oil as a cure-all natural? remedy that can heal without any of the toxicity of traditional treatments has begun to take hold . I did use some of the medication they hemp oil dabs prescribed but it was in combination with the oil. I am elated I want to continue sharing with people who are experiencing what I went through that there is absolutely hope and a cure out there. They just need to be proactive and aggressive with treatment not wait addition to being an effective cancer fighter there are some nice side effects that come from using the Rick Simpson oil for instance I no longer need to take any pain killers. Just one or two drops buy cannabidiol candy of the oil will ease the pain and help you sleep like a baby. Rick Simpson Oil How To Buy Best of all its natural Thanks to all the staff at Amsterdams Garden who guided me throughout this journey.. And since neither ustoms or TestPledge require CBD testing there is no incentive to test for CBD. ...
Engineered nanomaterials are subject of intense research since several years - nanoanalytical tools are mainly based on fractionation techniques such as FFF, HDC and CE coupled on-line with ICP-MS. Nowadays imaging techniques gain importance in life-science, e.g. for the application of nanomaterials or the analysis of single-cells.. Thus, the 7th Workshop on Field Flow Fractionation and Mass Spectrometry (FFF-MS) will focus on the application of nanomaterials in life science and environmental technology and the applicability of nanoanalytical tools in these fields.. A special focus will be placed on the complementary analysis of nanomaterials in life science application as well as during their synthesis. Special topics are. ...
The Postnova modular FFF platform can be configured for any single or combination of several of the five FFF subtechniques - Asymmetric Flow FFF (AF4), Hollow-Fibre Flow FFF (HF5), Electrical FFF (EAF4), Centrifugal FFF CF3) and Thermal FFF (TF3). Because of this flexibility, it can be used for the separation, characterization and fractionation of nearly any macromolecules or nanoparticles. The Postnova platform can be also configurated for Size Exclusion Chromatography (SEC or GPC). You can easily switch from FFF to SEC and vice versa. The NovaFFF software takes care of control, data acquisition and calculation. ...
Close The Infona portal uses cookies, i.e. strings of text saved by a browser on the users device. The portal can access those files and use them to remember the users data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser. ...
What exactly are nanoparticles and are they safe for humans and the environment? These and many more questions regarding nanoparticle safety and risks of nanotechnology are answered on nanopartikel.info.
In this study, a fully automated QuEChERS system was used to extract 204 different pesticides from various commodities. The matrices used for this evaluation were cabbage, valencia orange, raisin and purple corn flour. The performance of the Teledyne Tekmar AutoMate-Q40 automated QuEChERS platform was evaluated in comparison to a manual sample preparation workflow. Both preparations employed the AOAC 2007.01 unbuffered QuEChERS methodology, where all the samples were analyzed using liquid chromatographytandem mass spectrometry (LC-MS/MS). ...
In this study, a fully automated QuEChERS system was used to extract 204 different pesticides from various commodities. The matrices used for this evaluation were cabbage, valencia orange, raisin and purple corn flour. The performance of the Teledyne Tekmar AutoMate-Q40 automated QuEChERS platform was evaluated in comparison to a manual sample preparation workflow. Both preparations employed the AOAC 2007.01 unbuffered QuEChERS methodology, where all the samples were analyzed using liquid chromatographytandem mass spectrometry (LC-MS/MS). ...
The main goal of the work presented in this thesis is to improve the reliability of existing methods for speciation analysis of organotin compounds. Species-specific isotope dilution (SSID) calibration in combination with gas chromatography - inductively coupled plasma mass spectrometry was used to investigate the transformation of phenyltin species during sample preparation. Isotope-enriched phenyltin species were synthesized from corresponding isotope-enriched tin metals. SSID with a mixture of phenyltin species (PhTs) from one isotope was used to evaluate different extraction procedures for the determination of PhTs in fresh water sediment. Preparative liquid chromatography was used to produce single isotope-enriched phenyltin species making a multi-isotope spike (MI) SSID calibration possible. Different extraction procedures for the analysis of phenyltin species in biological samples were evaluated by applying MI-SSID. Degradation of TPhT and DPhT during sample extraction was observed and ...
ProteomeLab PF 2D Protein Fractionation System from Beckman Coulter,The ProteomeLab PF 2D is an automated, two-dimensional fractionation system for high-resolution analysis of complex protein mixtures. Part of Beckman Coulters ProteomeLab family of products, the PF 2D produces results in just hours. The system effectively resolves the thousands of proteins presen,biological,biology supply,biology supplies,biology product
Terpenes must be diluted prior to use for flavor and effect (1-5% by total volume - Ex: 2 drops per gram). Terpenes are oil soluble and mix well with plant extracts, coconut oil, and more.. Weigh then add your base extraction material to a small glass beaker.. Take (1%) of the base extraction material weight of additive (terpene or flavor) and add it to base extraction material. Use a pipette to apply the additive.. Add Magnetic Stir bar, apply to stir plate and mix for 10 minutes. Product may need a very small amount of heat if material is too thick. Heat to no more than 115 degrees F or 45 Degrees C. * If you do not have a heat plate or stir bar, use metal mixing spoon to manually mix (This option may be less evenly blended). *. Apply Mixture to your application (Rig reservoir, dab syringe, edible, beverage) and test ...
Terpenes must be diluted prior to use for flavor and effect (1-5% by total volume - Ex: 2 drops per gram). Terpenes are oil soluble and mix well with plant extracts, coconut oil, and more.. Weigh then add your base extraction material to a small glass beaker.. Take (1%) of the base extraction material weight of additive (terpene or flavor) and add it to base extraction material. Use a pipette to apply the additive.. Add Magnetic Stir bar, apply to stir plate and mix for 10 minutes. Product may need a very small amount of heat if material is too thick. Heat to no more than 115 degrees F or 45 Degrees C. * If you do not have a heat plate or stir bar, use metal mixing spoon to manually mix (This option may be less evenly blended). *. Apply Mixture to your application (Rig reservoir, dab syringe, edible, beverage) and test ...
ISOLUTE® QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) products provide simple clean-up of complex samples using salt assisted extraction and partitioning, followed by dispersive SPE.
ISOLUTE® QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) products provide simple clean-up of complex samples using salt assisted extraction and partitioning, followed by dispersive SPE.
AOAC QuEChERS IS Solution (2 components) cat.# 31963 Ready to use for generating test mixes, calibration standards, and spiking experiments.Reliable standards ...
Get this from a library! Principles and reactions of protein extraction, purification, and characterization. [Hafiz Ahmed] -- This book describes the mechanisms and experimental procedures for techniques used in protein extraction, purification, and characterization, ranging from classic to cutting-edge. Presenting the ...
To use, one simply places the requisite amount of PTS (15 wt% in water) into a test tube with a stir bar and adds the organic substrate(s) and catalyst. Reactions are generally complete within 3-24 hours and can be accelerated if needed upon mild heating to 40-50 °C. Work-up is also very simple involving either extraction of the reaction mixture with EtOAc-hexane or deposition onto a bed of silica gel and elution with EtOAc. In most examples studied, PTS outperformed other non-ionic amphiphiles such as Triton®-X100 and Brij® 30.. ...
Does anyone have suggestions for eliminating black, particulate sludge from my slides after Timms staining? Every square inch of glassware, stir bars, etc. has been acid cleaned and I am only using glass distilled water. When I add the silver nitrate to the developer I am getting a cloudy precipitate. Please advise with any and all ideas. Thanks, Nancy Lemke ...
Jun 17, 2019 · 2. Mixed-flow reactors for total X-ray scattering. The basic design of the MFR method is presented in the work of Blue et al. (2013, 2017).A high-precision syringe pump (Harvard Apparatus PHD ULTRA 4400) is used to continually pump the reactant solutions (Sigma-Aldrich ACS reagent CaCl 2 and Na 2 HPO 4 in 18 MΩ ultra-pure water) into the MFR. A stir bar placed within a well at the base of .. ...
Sage Science, a developer of products for improving sample preparation processes in life science applications, has announced the release of its new SageELF technology for DNA and protein fractionation. This sample prep instrument will be especially useful for preserving precious samples and has applications in next-generation sequencing as well as bottom-up or top-down proteomics experiments.
This protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following TRIzol isolation of RNA.
6. The hydrophobic & hydrophilic properties of the resin makes it ideal for both ion exchange and reverse phase chromatography. Norgen holds more than two dozen issued and pending patents, and has successfully exploited part of this extensive IP to develop over 150 sample preparation kits for RNA, DNA, and protein purification for research purposes. These kits are currently being sold to researchers in academia, pharma/biotech companies, and government institutions. Norgen has also demonstrated at the lab bench scale the utility of their resin technology for several industrial applications, including large scale pharmaceutical grade plasmid DNA isolation, filtration and removal of adventitious material, and large scale protein fractionation. These are all lucrative areas, and are available for out licensing. ...
Date: Apr 13, 2015. Author: separationsNOW. The precise cryogenic separation of oxygen-argon mixtures from natural air samples has been accomplished using a single 5Å (30/60 mesh) molecular sieve column at liquid nitrogen temperature, which is associated with isotopic fractionation.. Read More ...
Perform an efficient extraction of soluble proteins from bacterial cells with SoluLyse from Genlantis, a high-yielding and optimized bacterial lysis reagent.
The analysis of flavor compounds in dairy products such as milk, cream, yogurt and cheese as well as their blends with several ingredients usually requires cumbersome sample preparation steps such as liquid/liquid extraction, solid phase extraction or distillation techniques, often with the drawback of organic solvent use. Headspace and purge & trap methods do not use organic solvents, but their analyte range is restricted to volatile compounds and therefore characterize compounds that contribute to the aroma/smell of a sample, not flavor/taste. In addition heating of the sample should be avoided since this would lead to reaction products which dramatically modify the flavor and taste of any dairy product. The sensitivity of solid phase microextraction (SPME) is limited by the small amount of sorptive material that can be coated on the fibers. A new extraction technique, Stir Bar Sorptive Extraction (SBSE), that overcomes the major problems with classical extraction techniques is applied in this ...
Methods, systems and other embodiments associated with upgrading heavy oil are presented. A method (900) of upgrading heavy oil by deasphalting includes mixing (902) an initial solvent with raw heavy oil to produce a mixed heavy oil. The mixed heavy oil is heated (904) to produce heated heavy oil. High pressure pulses are created (906) in the heated heavy oil to crack the heated heavy oil to produce a cracked oil with a lower viscosity than the raw heavy oil.
This study was undertaken to optimize the conditions for the extraction of antibacterial activity of Perilla frutescens var. acuta leaf against Pseudomonas aeruginosa KCTC 2004 using the evolutionary operation-factorial (EVOP) design technique. Increased antibacterial activity was achieved at higher extraction temperatures and with a longer extraction time. Antibacterial activity was not affected by differing ethanol concentration in the extraction solvent. The maximum antibacterial activity of ethanolic extract of P. frutescens var. acuta leaf against P. aeruginosa, determined by the EVOP factorial technique, was obtained at an extraction temperature of 80 °C (R = −0.800**), 26 h (R = −0.731**) extraction time, and 50% (R = −0.075) ethanol concentration. The population of P. aeruginosa also decreased from 6.660 log CFU/mL in the initial set to 4.060 log CFU/mL in the third set. Also, scanning electron microscopy study of the ethanolic extract of P. frutescens var. acuta revealed potential
Global Heavy Oil Hydrotreating Catalyst Market 2017, presents a professional and in-depth study on the current state of the Heavy Oil Hydrotreating Catalyst market globally, providing basic overview of Heavy Oil Hydrotreating Catalyst market including Definitions, Classifications, Applications and Industry chain structure, Heavy Oil Hydrotreating Catalyst Market report provides development policies and plans are discussed as well as manufacturing processes and cost structures. Heavy Oil Hydrotreating Catalyst market size, share and end users are analyzed as well as segment markets by types, applications and companies.. Download Free Sample Report @ http://www.fiormarkets.com/report-detail/34066/request-sample. Global market research report of Heavy Oil Hydrotreating Catalyst 2017 mainly focuses on Production, means the output of Heavy Oil Hydrotreating Catalyst and Revenue, means the sales value of Heavy Oil Hydrotreating Catalyst in market ...
Abstract: Microwave-assisted extraction was investigated for extraction of polysaccharides from Catathelasma ventricosum using Response Surface Methodology (RSM). The effects of operating conditions (extraction time, microwave power and ratio of water to raw material) on the extraction yield of polysaccharides were studied. A Box-Behnken Design was used for experimental design and analysis of the results to obtain the optimal processing parameters. Among the three extraction parameters, the microwave power was the most significant factor to affect the yield of polysaccharides from Catathelasma ventricosum. In addition, microwave power and extraction time had significant interaction effects. A mathematical model with high determination coefficient was gained and could be employed to optimize polysaccharides extraction and the optimal conditions were extraction time 5 min, microwave power 420 W, ratio of water to raw material 25:1. Under these conditions, the experimental yield of polysaccharide ...
Macrophage suppression has been shown to be mediated by a unique, low molecular weight fraction of murine serum. The present investigation involves the in vitro production of this macrophage modulator (suppressor) by Concanavalin A-stimulated spleen cells. Spleen cell culture supernatant containing macrophage suppressor factor (MSF) caused a significant decrease in in vitro phagocytosis of Listeria monocytogenes by non-elicited peritoneal macrophages. The molecular weight of MSF was determined by ultrafiltration to be less than 10,000, and the modulating activity of MSF was not altered by heating at 100°C for 30 minutes or freezing at -70°C for six months. MSF is resistant to treatment with Pronase E, but is, however, sensitive to acid hydrolysis. Activity of MSF in spleen cell culture supernatants from normal mice does not differ from supernatants from mice immunized with L. monocytogenes. It was therefore concluded that MSF is not affected by antigenic stimulation and is apparently produced
In previous blog posts for this series on QuEChERS, we discussed QuECHERS dSPE Selection, Modifying QuECHERS..-Dry Samples and Modifying QuEChERS..-High Fat Samples Once again, I suggest to use the following from the official QuEChERS website (QuEChERS.com), maintained by CVUA Stuttgart, these specific documents: For Extraction (Stage 1): https://www.QuEChERS.com/pdf/reality.pdf For dSPE Cleanup (Stage 2): https://www.QuEChERS.com/pdf/cleanup.pdf References […]. ...
Melinjo skin is usually used for making some vegetables, but skin melinjo has not been used optimally. The purpose of this experiment was to determine antioxidant activity in red melinjo skin extract using solvent combination of ethanol and ethyl acetate by ratio 100 : 0, 80 : 20, 60 : 40, 40 : 60, 20 : 80, and 0 : 100, differences in extraction temperature which are room temperature (±26°C), 40°C, and 60°C, and differences in extraction time which are 3, 6, and 9 hour. Antioxidant activity was determined by IC50, phenolic in total, content of vitamin C, color spectrum, and chromatography. The result obtained showed that solvent combination of ehanol and ethyl acetate by ratio 20 : 80 has the highest phenolic in total (11,70 mg GAE/g extract) and low IC50 (591,24 mg/g extract). The treatment combination between pH and temperature are used to optimize the antioxidant compound in the best extract which has been selected based on best solvent ratio, the best temperature, and the best time ...
View kits, reagents and equipment for quick protein fractionation by physical properties or cellular location. Improve identification of low-abundance proteins.
Liposomes are currently being investigated as potential parenterally used drug carriers. The main factor that influences the in vivo behavior of such liposomes is their vesicle size. A detailed and reliable knowledge of vesicle size is therefore necessary in order to interpret results of physical and biological investigations in a correct manner. It has earlier been discovered that it is feasible to determine the size distribution of vesicle dispersions in a reliable manner and it appears especially useful to employ the combination of SEC fractionation, PCS and the enzymatic PC quantitation. A drawback discovered was for certain liposome dispersions that in some of the dispersions SEC fractionation showed incomplete recovery of the vesicles. This indicated a demand for a different fractionation method which does not have the limitations that the SEC method described above has. To this end flow field-flow fractionation was chosen. In a previous study the influence of some key factors such as ...
Theoretical Study on the Extraction of Alkaline Earth Salts by 18-Crown-6: Roles of Counterions, Solvent Types and Extraction Temperatures
|p| The injection of a mixed toluene and D |sub|2|/sub| O (conservative tracer) pulse into a pristine mesoscale aquifer enabled a first direct experimental comparison of contaminant-specific isotopic fractionation from sorption versus biodegradation and transverse dispersion on a relevant scale. Water samples were taken from two vertically resolved sampling ports at 4.2 m distance. Analysis of deuterium and toluene concentrations allowed quantifying the extent of sorption (R = 1.25) and biodegradation (37% and 44% of initial toluene at the two sampling ports). Sorption and biodegradation were found to directly affect toluene |sup|13|/sup| C/ |sup|12|/sup| C breakthrough curves. In particular, isotope trends demonstrated that biodegradation underwent Michaelis-Menten kinetics rather than first-order kinetics.
The influence of different extraction methodologies was assessed on the composition of both neutral (arabinose, rhamnose, galactose) and acidic (galacturonic acid) pectic polysaccharides obtained from four agro-industrial residues, namely, berry pomace (BP), onion hulls (OH), pressed pumpkin (PP), and sugar beet pulp (SBP). For acidic pectic polysaccharides, the extraction efficiency was obtained as BP (nitric acid-assisted extraction, 2 h, 62.9%), PP (enzymatic-assisted extraction, 12 h, 75.0%), SBP (enzymatic-assisted extraction, 48 h, 89.8%; and nitric acid-assisted extraction, 4 h, 76.5%), and OH (sodium hexametaphosphate-assisted extraction, 0.5 h, 100%; and ammonium oxalate-assisted extraction, 0.5 h, 100%). For neutral pectic polysaccharides, the following results were achieved: BP (enzymatic-assisted extraction, 24 h, 85.9%), PP (nitric acid-assisted extraction, 6 h, 82.2%), and SBP (enzymatic assisted extraction, 48 h, 97.5%; and nitric acid-assisted extraction, 4 h, 83.2%). On the ...
GE Healthcare Yeast Protein Extraction Buffer Kit Yeast protein extraction buffer kit Life Sciences:Protein Biology:Protein Extraction and Purification:Protein Extraction:Cell
Nano(bio)science and nano(bio)technology play a growing and tremendous interest both on academic and industrial aspects. They are undergoing rapid developments on many fronts such as genomics, proteomics, system biology, and medical applications. However, the lack of characterization tools for nano(bio)systems is currently considered as a major limiting factor to the final establishment of nano(bio)technologies. Flow Field-Flow Fractionation (FlFFF) is a separation technique that is definitely emerging in the bioanalytical field, and the number of applications on nano(bio)analytes such as high molar-mass proteins and protein complexes, sub-cellular units, viruses, and functionalized nanoparticles is constantly increasing. This can be ascribed to the intrinsic advantages of FlFFF for the separation of nano(bio)analytes. FlFFF is ideally suited to separate particles over a broad size range (1 nm-1 μm) according to their hydrodynamic radius (rh). The fractionation is carried out in an empty ...
Postnova Analytics reports on exciting advances in the analysis of plasma proteins using a hyphenated system that couples asymmetric flow Field-Flow Fractionation (AF4) and inductively coupled plasma-mass spectrometry (ICP-MS).  In a new application study researchers show how an AF4-ICP-MS system is able to obtain valuable information on the multi-element speciation and absolute molecular mass of human plasma proteins such as Albumin and Transferrin. Human Serum Albumin (HSA) and Transferrin are the two main plasma proteins that are known to bind and transfer metal ions in biological fluids. Metal-protein complexes are involved...
misc{8892516, abstract = {The physicochemical properties of oat β-glucan have been shown to govern its health benefits by a plethora of studies. However, the effect of the passage through the gastrointestinal tract on the conformational and structural characteristics is not fully explained. The aim of the present study was to elucidate the effect of in vitro gastrointestinal conditions on the structure and conformation of oat β-glucan utilizing Asymmetric Flow Field-Flow Fractionation (AF4) coupled with multiple detectors and in conjunction with NMR. Oat β-glucan was gently extracted from oat flour and its conformational characteristics before and after in vitro gastric and gastrointestinal digestion was investigated with AF4. The contribution of digestive enzymes and bile acids on the conformation of β-glucan was also explored. Moreover, the structural features and the bile acid-binding capacity of oat β-glucan were analyzed with NMR spectroscopy. Oat β-glucan without digestion presented ...
article{fb76340e-5768-4989-8c20-3ad5b72c0e89, abstract = {,p,A plethora of studies have shown that the physicochemical properties of oat β-glucan determine its health benefits. However, the impact of the passage through the gastrointestinal tract on the conformational and structural characteristics is not fully understood. The present study aims to elucidate the structure and conformation of gently extracted oat β-glucan before and after in vitro gastric and gastrointestinal digestion utilizing asymmetric flow field-flow fractionation (AF4) and NMR spectroscopy. The structural features and the bile acid-binding capacity of oat β-glucan were probed with NMR. Oat β-glucan without digestion presented primary aggregates with fringed micelle structure, and other high molar mass supramolecular secondary aggregates were detected. Under gastric conditions, the molar mass was reduced and an increase in apparent density, suggesting more compact and disrupted aggregates, was observed. In the intestinal ...
Thermo Scientific™ HyperSep™ Dispersive SPE Extraction Products (QuEChERS) 6g anhydrous MgSO|sub|4|/sub|, 1.5g NaCl, 1.5g sodium citrate tribasic...
To determine the antidiabetic potential of phytochemicals found in M. balbisiana C., researchers decided to extract them from seeds using different extraction solvents. Then, they evaluated the antidiabetic activity of the extracts in terms of their ability to inhibit digestive enzymes such as alpha-glucosidase and alpha-amylase, as well as their ability to prevent glycation and enhance glucose uptake in cell cultures.. Alpha-glucosidase and alpha-amylase are enzymes necessary for breaking down carbohydrates, which is the source of glucose in the blood. Inhibitors of these enzymes are used in the treatment of diabetes because they prevent the presence of too much glucose in the blood. Glycation, on the other hand, refers to sugars attaching onto proteins, forming advanced glycation end-products (AGEs) which are harmful to the body. AGEs are involved in the progression of diabetes and other degenerative diseases.. Based on their results, the researchers concluded that acetone is the best ...
Toxicological analysis of bone During a post-mortem examination, determining whether the deceased has ingested a drug and if so, when and how much can be critical to establishing the cause of death. Usually, this involves analysis of blood, urine, hair, and perhaps tissue samples from the liver or kidneys. In circumstances where the body has lain...
A biomarker for RA was identified in the synovial fluid of patients with RA using a modified strategy previously used to identify cancer biomarkers. An Agilent immunodepletion column was used to remove six abundant serum proteins (albumin, antitrypsin, haptoglobin, IgA, IgG, and transferrin) then the depleted synovial fluid was fractionated using a Beckman ProteomeLab PF2D Protein Fractionation System. Proteins were fractionated in the first dimension by chromatofocussing and in the second dimension by reverse phase High Performance Liquid Chromatography. This protein fractionation strategy increased the chance of identifying the lower abundance proteins by separating them from the higher abundance proteins, which could mask their presence. The second dimension fractions were used to construct protein arrays on nitrocellulose membranes, which were used to test for the presence of autoantigens by analysing differential reactivity of RA and control sera. Only sera obtained from RA patients is ...
There is limited experience and methods for extractions of drug therapy data from electronic health records (EHR) in the hospital setting. We have therefore developed and evaluated completeness and consistency of an automatic versus a semi-automatic extraction procedure applied on prescribing and administration of the TNF inhibitor infliximab using a hospital EHR system in Karolinska University Hospital, Sweden. Using two different extraction methods (automatic and semi-automatic), all administered infusions of infliximab between 2007 and 2010 were extracted from a database linked to the EHR system. Extracted data included encrypted personal identity number (PIN), date of birth, sex, time of prescription/administration, healthcare units, prescribed/administered dose and time of admission/discharge. The primary diagnosis (ICD-10) for the treatment with infliximab was extracted by linking infliximab infusions to their corresponding treatment episode. A total of 13,590 infusions of infliximab were ...
EDGE Application Note Abstract The QuEChERS method has been shown to be practical for pesticide analysis on a number of different sample types and is increasingly being employed on more difficult matrices.  Unfortunately, this process is a manual multi-step process that can be time consuming. With so many different types of food matrices and pesticide residues to be analyzed there is a need for a faster simplified extraction method. Furthermore, some matrices either by their nature or their economic value, can be difficult to analyze with just the QuEChERS method alone. In this application note we propose the EDGE™ as an alternative to the QuEChERS method for the extraction of pesticides from food matrices including known difficult matrices. With its patent pending Q-Cup Technology™ the EDGE can extract a difficult food sample, including the dispersive solid phase cleanup, in less than 5 minutes in one automated
Purchase Introduction to Enhanced Recovery Methods for Heavy Oil and Tar Sands - 2nd Edition. Print Book & E-Book. ISBN 9780128499061, 9780128018750
Stable and radioactive isotopes are extensively used as tracers of numerous processes in the planetary and terrestrial environment. The relative abundances of isotopic species measured by their ratios
Remove from microwave and let cool by either sitting on bench top or adding stir bar and placing on stir plate. ,br, The advantage of the stir plate is that, if you forget about your gel for a while, it is less likely to solidify accidentally. ,br, If you are in a hurry, you can place the bottle in a beaker of room temperature water on the stir plate to speed the cooling process significantly ...
The existing conceptions on the problem of liquid phase sintering fail to give answers to many questions like the following: why do compacts during liquid-phase sintering grow at first and then...
Stir 2-3 hours (not overnight) in a 2.8 liter Fernbach flask and large magnetic stir bar. Do not heat. Do not store overnight in presence of resin. Residual catalyst from the resin will polymerize the acrylamide. Filter through a Buchner funnel using Whatman #3 over Whatman #1 into a 4 Liter sidearm flask or use a 0.45 micron disposable filter. Rinse resin. Adjust volume to 1.9 liters. Immediately rinse MB3 resin from Fernbach flask as dry resin will stick very firmly ...
How does Deyuan manufacture wholesale solvent ?:Zhengzhou Deyuan Fine Chemicals Co., Ltd. has always focused on this procedure for manufacturing wholesale solvent ...
HPLC Training Course March 6, 2018 at 8:00 am - 5:00 pm London, UK Register Here: http://ow.ly/mwTX30igJEpLearn how to set up and run HPLC analysis with full understanding of all the method parameters such as the column, the mobile phase, the instrumentation, and sample preparation, and how to interpret and quantify the results of the analysis. ...
HPLC Training Course March 6, 2018 at 8:00 am - 5:00 pm London, UK Register Here: http://ow.ly/mwTX30igJEpLearn how to set up and run HPLC analysis with full understanding of all the method parameters such as the column, the mobile phase, the instrumentation, and sample preparation, and how to interpret and quantify the results of the analysis. ...
Multi-residue pesticide analysis is challenging due to the low limits of detection required in a diverse range of food commodities. As there are currently in excess of 1000 pesticides in use, laboratories are under increasing pressure to broaden the range of pesticides determined in ever shorter turnaround times. Therefore, the analytical methods they employ need to be sensitive and robust in a wide variety of sample matrices. This application note demonstrates that the Waters Xevo TQ-S equipped
Date: Jan 27, 2014. Author: spectroscopyNOW. The different aspects and methodologies related to microwave-assisted extraction of botanical materials that were subjected to experimental design have been reviewed, along with some general chemometric tools and the steps involved in its practice.. Read More ...
Buy Principles and Reactions of Protein Extraction, Purification, and Characterization (9780849320347): NHBS - H Ahmed, CRC Press
This protocol involves three steps to prepare nuclear extracts. First, the cells are collected. Then, make cell membrane fragile using a pestle in hypotonic buffer. After collection of the...
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Oxygen and sulfur isotope fractionation". Chemical Geology. 269 (3-4): 252-261. Bibcode:2010ChGeo.269..252T. doi:10.1016/j. ... Just as the fractionation of oxygen isotopes reveal, the larger fractionations in sulfate from the disproportionation of ... MSO has been found to produce small fractionations in 18O compared to water (~5‰). Given the very small fractionation of 18O ... The fractionation of sulfur and oxygen isotopes during microbial sulfide oxidation (MSO) has been studied to assess its ...
The Separation of Purified Fibrinogen from Fraction I of Human Plasma". Journal of the American Chemical Society. 70 (9): 3103- ... and immunological studies on the products of human plasma fractionation. XVI. Fibrin clots, fibrin films, and fibrinogen ... The Conversion of Human Fibrinogen to Fibrin under Various Conditions1,2". Journal of the American Chemical Society. 69 (2): ... Some Factors Influencing the Quantitative Determination of Fibrinogen1,2". Journal of the American Chemical Society. 69 (11): ...
A sequential chemical fractionation called Humeomics can be used to isolate more homogeneous humic fractions and determine ... May 15, 2017). "A molecular zoom into soil Humeome by a direct sequential chemical fractionation of soi". The Science of the ... Nebbioso A. and Piccolo A. (2011). "Basis of a Humeomics Science: Chemical Fractionation and Molecular Characterization of ... However, single classes of residual biomolecules have been identified by selective extractions and chemical fractionation, and ...
"Isotopic fractionation of the major elements of molten basalt by chemical and thermal diffusion". Geochimica et Cosmochimica ... Vesta has iron fractionations of 0.010 ± 0.010‰ per atomic mass unit. The chondritic reservoir exhibits fractionations of 0.069 ... In the future, the comparison of observed biological fractionation of iron on Earth to fractionation on other planetary bodies ... Iron isotopic fractionation is also commonly described in units of per mil per atomic mass unit. In many cases, the δ56Fe value ...
When there is no equilibrium between phases or chemical compounds, kinetic fractionation can occur. For example, at interfaces ... Biological fractionation is a form of kinetic fractionation since reactions tend to be in one direction. Biological organisms ... Kinetic fractionation generally is enhanced compared to equilibrium fractionation and depends on factors such as reaction rate ... Through a variety of physical and chemical processes, chemical elements change in concentration and move around in what are ...
Due to physical and chemical fractionation processes, the variations in the isotopic compositions of elements are reported, and ... Prinzhofer, Alain (1995). "Genetic and post-genetic molecular and isotopic fractionations in natural gases". Chemical Geology. ... The rate of a chemical reaction depends in part on the energies of the chemical bonds being formed and broken in the reaction. ... resulting in a fractionation of the different isotopes between the reactant and product in a chemical reaction. This is known ...
"The fractionation of crude petroleum by capillary diffusion". American Chemical Journal. 40 (6): 495-537.CS1 maint: multiple ... Runge dropped spots of different inorganic chemicals onto circles of filter paper already impregnated with another chemical, ... Tsvet applied his observations with filter paper extraction to the new methods of column fractionation that had been developed ... The ease and efficiency of gas chromatography for separating organic chemicals spurred the rapid adoption of the method, as ...
Mass-dependent and mass-independent fractionation of minor sulfur isotopes may also be an important gauge for the sulfur cycle ... Takano, B. (June 1985). "Geochemical implications of sulfate in sedimentary carbonates". Chemical Geology. 49 (4): 393-403. ... Prior to this, the Archean Earth was exposed to high-energy radiation that caused mass-independent fractionation of various ... For example, sulfur at the time of Earth's formation should have (barring some accretion-related fractionation process for ...
Schauble E, Rossman GR, Taylor HP (2004) Theoretical estimates of equilibrium chromium-isotope fractionations. Chemical Geology ... Chemical Geology 25, 79-94. Potter RM, Rossman GR (1979) Tetravalent manganese oxides - identification, hydration, and ... Journal of the American Chemical Society 110, 1367-1375. Lager GA, Armbruster T, Rotella FJ, Rossman GR (1989) The OH ... Journal of the American Chemical Society 94, 2683-2690. Goldman DS, Rossman GR, Dollase WA (1977) Channel constituents in ...
Sims, K.W.W., H.E. Newsom, and E.S. Gladney (1990). "Chemical fractionation during formation of the Earth's core and ... at the University of New Mexico's Institute of Meteoritics in 1989, where his research focused on chemical fractionation during ... Chemical Geology, 412, 151-166, .org/10.1016/j.chemgeo.2015.07.023 *Arendt, C.A. S. M. Aciego, K.W.W. Sims, and S. M. Aarons ( ... "Chemical and isotopic constraints on the generation and transport of melt beneath the East Pacific Rise." Geochimica et ...
"Advanced fractionation technology for the oleochemical industry". Asia-Pacific Journal of Chemical Engineering. 2 (4): 315-321 ...
Chemical and enzymatic fractionation of cell walls from Fucales: insights into the structure of the extracellular matrix of ...
... fractionation during chemical processing can be problematic for certain isotopic analyses, such as measuring heavy isotope ... 2016). "Material" gives chemical formula, "Type of ratio" is the isotopic ratio reported in "Isotope ratio", and "Citation" ... In Table 1, "Name" refers to the common name of the reference, "Material" gives its chemical formula and phase, "Type of ratio ... By measuring a material of known isotopic composition, fractionation within the mass spectrometer can be removed during post- ...
There she continued work on using isotope fractionation to understand how chemical weathering of the continental crust has ... Rudnick has served as editor-in-chief of Chemical Geology from 2000 to 2010. In 2012 she was made Department Chair. In 2015 ... She worked out the chemical composition and depths of xenoliths. Whilst she was a student she used the Sensitive high- ... "Editor-In-Chief of Chemical Geology, Professor Roberta Rudnick, Elected to NAS". www.elsevier.com. Retrieved 2018-08-12. "Robin ...
During chemical fractionation, certain elements may become more or less concentrated, which can allow geochemists to quantify ... This phenomenon known as chemical fractionation and can be described by an equilibrium constant, K {\displaystyle K} which sets ... A study conducted in East China in 1998 looked at the chemical composition of various elements found in the crust in China. One ... Gao, Shan; Luo, Ting-Chuan; Zhang, Ben-Ren; Zhang, Hong-Fei; Han, Yin-wen; Zhao, Zi-Dan; Hu, Yi-Ken (1998). "Chemical ...
The chemical species of interest can be represented via the reaction: 2CH2O + SO42− → H2S + 2HCO3− In the reaction above, the ... Sørensen, Ketil B; Canfield, Donald E (2004-02-01). "Annual fluctuations in sulfur isotope fractionation in the water column of ... Nägler, T. F.; Neubert, N.; Böttcher, M. E.; Dellwig, O.; Schnetger, B. (2011-10-07). "Molybdenum isotope fractionation in ... Chemical Geology. 206 (3-4): 347-372. doi:10.1016/j.chemgeo.2003.12.011. Bond, David; Wignall, Paul B.; Racki, Grzegorz (2004- ...
... foams having very high specific surface area is exploited in the chemical processes of froth flotation and foam fractionation. ... Chemical methods of foam control are not always desired with respect to the problems (i.e., contamination, reduction of mass ... Mechanical methods to prevent foam formation are more common than chemical ones. The acoustical property of the speed of sound ... For example, foam is a serious problem in the chemical industry, especially for biochemical processes. Many biological ...
... thermal field-flow fractionation, separation of polymers having the same size but different chemical compositions is possible. ... Another possibility to overcome these issues is the separation by field-flow fractionation (FFF). Field-flow fractionation (FFF ... The term gel permeation chromatography can be traced back to J.C. Moore of the Dow Chemical Company who investigated the ... The availability of a detector makes the fractionation convenient and accurate. Gels are used as stationary phase for GPC. The ...
Utilizing the then new techniques of ultra-centrifugation and chemical fractionation, Smadel made significant contributions to ...
Laboratory condensers are usually made of glass for chemical resistance, for ease of cleaning, and to allow visual monitoring ... petroleum fractionation, gas processing and dehydration (4th ed.). New York: Elsevier-Gulf Professional Publishing. ISBN 978-0- ... Pasto, Daniel J; Johnson, Carl R (1979). Laboratory Text for Organic Chemistry: A Source Book of Chemical and Physical ... Jensen, William B. (2006) "The origins of the Liebig condenser," Journal of Chemical Education, 83 : 23. Kahlbaum, Georg W. A ...
Crystallization elution fractionation (CEF): high-throughput chemical composition distribution analyzer by CEF TGIC: technique ... Chemical composition distribution Chemical composition distribution (CCD) together with the molar mass distribution (MMD) and ... crystallization analysis fractionation). Temperature rising elution fractionation (TREF): for the characterization of CCD in ... Preparative fractionation PREP mc2: preparative instrument to fractionate polymers by molar mass or composition (TREF or ...
Integrating bioassay-directed fractionation with chemical analysis, the team identified the toxin on the afternoon of December ... and Pseudo-nitzschia links at the ISSHA website Domoic acid at International Programme on Chemical Safety DOMOIC ACID - A MAJOR ...
... postulates that certain isotopic compositions of chemical elements affect kinetics of chemical reactions involving molecules ... 4. Stable nuclide Mass independent isotope fractionation Heavy water R.A. Zubarev et al., Early life relict feature in peptide ... Thus chemical and biological effects of heavier isotopes of the "biological" atoms C, N and O are expected to be much smaller ... As an example of isotopic symmetry (in compositional, and not in geometrical sense) affecting the kinetics of physic-chemical ...
... is a chemical process closely related to foam fractionation in which foam is used to separate ... dμ1 is the change in chemical potential of the solvent, and dμ2 is the change in chemical potential of the solute: d γ = Γ 1 d ... If the chemical potentials promote surface adsorption, the contaminant will move from the bulk of the solvent and form a film ... Foam fractionation is used on a smaller scale whereas continuous foam separation is implemented on a larger scale such as water ...
... from complex insect-plant odors by fractionation and subtractive-combination bioassay" (PDF). Journal of Chemical Ecology. 16 ( ... Graphical depiction of chemical structures". Journal of Chemical Information and Modeling. 30 (3): 237-43. doi:10.1021/ ... a chemical language and information system. 1. Introduction to methodology and encoding rules". Journal of Chemical Information ... The chemical graph is first trimmed to remove hydrogen atoms and cycles are broken to turn it into a spanning tree. Where ...
... s can be studied by spectroscopy, especially in the ultraviolet domain, by fractionation or paper chromatography. ... They can also be analysed by chemical characterisation. Instrumental chemistry analyses include separation by high performance ... Tempel, A. S. (1982). "Tannin-measuring techniques". Journal of Chemical Ecology. 8 (10): 1289-1298. doi:10.1007/BF00987762. ... Journal of Chemical Technology and Biotechnology. 80 (4): 433-438. doi:10.1002/jctb.1222. INIST:16622840. K. K. Jindal; R. C. ...
NGL stream is instead transported as a mixed product to standalone fractionation complexes located near refineries or chemical ... The NGL fractionation process treats offgas from the separators at an oil terminal or the overhead fraction from a crude ... The gaseous feed to the NGL fractionation plant is typically compressed to about 60 barg and 37°C. The feed is cooled to -22°C ... Fractionation aims to produce useful products including natural gas suitable for piping to industrial and domestic consumers; ...
... compositions of any meteorites and are often used as a standard for assessing the degree of chemical fractionation experienced ... "Primitive," in this sense, means that the abundances of most chemical elements do not differ greatly from those that are ... Van Schmus, W. R.; Wood, J. A. (1967). "A chemical-petrologic classification for the chondritic meteorites". Geochimica et ... A chondrite's group is determined by its primary chemical, mineralogical, and isotopic characteristics (above). The degree to ...
The decisive experiment on 16-17 December 1938 (using a chemical process called "radium-barium-mesothorium fractionation") ... By 1920 chemical isotopes had been discovered, the atomic masses had been determined to be (approximately) integer multiples of ... Radium (atomic number 88) and barium (atomic number 56) are in the same chemical group. By January 1939 Hahn had concluded that ... If the elements were ordered based on increasing atomic mass, however, periodicity in chemical properties was exhibited. ...
The relative abundances of different isotopes are then used to describe the chemical fractionation of different isotopes, ... Mattinson, James M. (July 2005). "Zircon U-Pb chemical abrasion ("CA-TIMS") method: Combined annealing and multi-step partial ... Quantitative isotope ratio techniques include isotope dilution thermal ionization mass spectrometry (ID-TIMS) and chemical ... is usually conducted at relatively low temperatures in exchange for long-lasting signals and minor isotopic fractionation. The ...
Fractionation processEdit. General method of fractionation: Cell sample is stored in a suspension which is: *Buffered - neutral ... Current Opinion in Chemical Biology, Vol. 10, 2006. pp. 430-436.. *Dam, J., Velikovsky, C.A., Mariuzza R.A., et al. ... In the chemical and food industries, special centrifuges can process a continuous stream of particle-laden liquid. ... Ultracentrifuges can also be used in the study of membrane fractionation. This occurs because ultracentrifuges can reach ...
Fractionation of proteins by heparin chromatography։ Methods Mol Biol։ Methods in Molecular Biology™ 424։ 2008։ էջեր 213-21։ ... R. Baselt, Disposition of Toxic Drugs and Chemicals in Man, 8th edition, Biomedical Publications, Foster City, CA, 2008, pp. ... Linhardt RJ, Gunay NS., Gunay (1999)։ «Production and Chemical Processing of Low Molecular Weight Heparins»։ Sem. Thromb. Hem. ... Shively JE, Conrad HE., Conrad (1976)։ «Formation of anhydrosugars in the chemical depolymerization of heparin»։ Biochemistry ...
Chemical formula. Example Nesosilicates. isolated silicon tetrahedra. [SiO4]4−. olivine. Sorosilicates. double tetrahedra. [Si2 ... These processes include partial melting, crystallization, fractionation, metamorphism, weathering, and diagenesis. Diatomaceous ...
"XXIV.-On chemical analysis by spectrum-observations". Quarterly Journal of the Chemical Society of London 13 (3): 270. 1861. ... "Lithium isotopic signatures of peridotite xenoliths and isotopic fractionation at high temperature between olivine and ... Krebs, Robert E. (2006). The history and use of our earth's chemical elements: a reference guide. Greenwood Publishing Group. s ... juli 2007). Encyclopedia of Chemical Processing and Design: Volume 28 - Lactic Acid to Magnesium Supply-Demand Relationships. M ...
Schedules for fractionation. One fractionation schedule that is increasingly being used and continues to be studied is ... Targeting can be due to the chemical properties of the isotope such as radioiodine which is specifically absorbed by the ... Fractionation also allows tumor cells that were in a relatively radio-resistant phase of the cell cycle during one treatment to ... Ang, K. Kian (October 1998). "Altered fractionation trials in head and neck cancer". Seminars in Radiation Oncology. 8 (4): 230 ...
... is a chemical compound with the formula N2F2. It is a gas at room temperature, and was first identified ... These isomers are thermally interconvertible but can be separated by low temperature fractionation. The trans-form is less ...
This effect is known as isotopic fractionation.[9][13] To determine the degree of fractionation that takes place in a given ... Cotton wool, cigarette ash, paper labels, cloth bags, and some conservation chemicals such as polyvinyl acetate can all be ... 2 and carbonate at the ocean surface is also subject to fractionation, with 14. C in the atmosphere more likely than 12. C to ... Isotopic fractionation[edit]. Photosynthesis is the primary process by which carbon moves from the atmosphere into living ...
Kent SB (February 2009). "Total chemical synthesis of proteins". Chemical Society Reviews. 38 (2): 338-51. doi:10.1039/b700141j ... Hey J, Posch A, Cohen A, Liu N, Harbers A (2008). Fractionation of complex protein mixtures by liquid-phase isoelectric ... "Accounts of Chemical Research. 50 (8): 1875-82. doi:10.1021/acs.accounts.7b00195. ISSN 0001-4842. PMC 5584629. PMID 28723063.. ... which rely on organic synthesis techniques such as chemical ligation to produce peptides in high yield.[17] Chemical synthesis ...
The Kyshtym disaster was a radiation contamination accident (after a chemical explosion that occurred within a storage tank) at ...
Utilizing the then new techniques of ultra-centrifugation and chemical fractionation, Smadel made significant contributions to ...
... foams having very high specific surface area is exploited in the chemical processes of froth flotation and foam fractionation. ... Chemical methods of foam control are not always desired with respect to the problems (i.e., contamination, reduction of mass ... For example, foam is a serious problem in the chemical industry, especially for biochemical processes. Many biological ... Mechanical methods to prevent foam formation are more common than chemical ones. ...
"Dirty work: Soil formation and isotope fractionation behind Brumbaugh Academic Center" (PDF). Juniata College Geology ... Chemical Geology. 195: 229-273. doi:10.1016/S0009-2541(02)00397-2.. ...
"CDC - NIOSH Pocket Guide to Chemical Hazards - Vegetable oil mist". www.cdc.gov. Retrieved 2015-11-27.. ... "Pilot-scale supercritical carbon dioxide extraction and fractionation of wheat germ oil". Journal of the American Oil Chemists ... This can be done via mechanical extraction using an oil mill or chemical extraction using a solvent. The extracted oil can then ... Flavor base - oils can also "carry" flavors of other ingredients, since many flavors are due to chemicals that are soluble in ...
History of the Origin of the Chemical Elements and Their Discoverers *^ Stephen David Barrett; Sarnjeet S. Dhesi (2001). The ... as well as the fractionation history the rock has undergone.[20] Fractionation is in turn a function of the partition ... Infrared lasers, chemical reducing agent, decoy flares, stainless steel, stress gauges, nuclear medicine, monitoring ... Chemical oxidizing agent, polishing powder, yellow colors in glass and ceramics, catalyst for self-cleaning ovens, fluid ...
The occupational hazards from airborne radioactive particles in nuclear and radio-chemical applications are greatly reduced by ...
This effect is known as isotopic fractionation.[44][45]. To determine the degree of fractionation that takes place in a given ... "Radiocarbon Dating - American Chemical Society". American Chemical Society. Retrieved 2016-10-09.. ... 2 and carbonate at the ocean surface is also subject to fractionation, with 14. C in the atmosphere more likely than 12. C to ... Physical and chemical detailsEdit. Main article: Carbon-14. In nature, carbon exists as two stable, nonradioactive isotopes: ...
The folded protein complexes of interest separate cleanly and predictably due to the chemical and physical properties of the ... thereby resulting in a fractionation by approximate size during electrophoresis. SDS is a strong detergent agent used to ... A small band before albumin represents transthyretin (also named prealbumin). Some forms of medication or body chemicals can ...
"Chemical & Engineering News. 81 (36).. *^ Lockyear, JF; Douglas, K; Price, SD; Karwowska, M; et al. (2010). "Generation of the ... Argon is isolated from air by fractionation, most commonly by cryogenic fractional distillation, a process that also produces ... and other chemical reactions that degrade the products are retarded or prevented entirely. High-purity chemicals and ... Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas ...
Journal of Chemical Technology and Biotechnology, 71(2), 95-110. *^ Boi, C. (2007). Membrane adsorbers as purification tools ... are available in a variety of geometries and chemistry which allows them to be used for purification and also fractionation, ... Harris, Daniel C. (2010). Quantitative Chemical Analysis. New York: W. H. Freeman and Company. p. 637. ISBN 978-1429218153. .. ... Harris, Daniel C. (2010). Quantitative Chemical Analysis. New York: W. H. Freeman and Company. p. 638. ISBN 978-1429218153. .. ...
XXIV.-On chemical analysis by spectrum-observations. Quarterly Journal of the Chemical Society of London. 1861, 13 (3): 270. ... Lithium isotopic signatures of peridotite xenoliths and isotopic fractionation at high temperature between olivine and ... Chemical Geology. 2004, 212 (1-2): 163-177. Bibcode:2004ChGeo.212..163S. doi:10.1016/j.chemgeo.2004.08.009.. ... Krebs, Robert E. The history and use of our earth's chemical elements: a reference guide. Greenwood Publishing Group. 2006: 47 ...
... various ChIP-seq and other sequencing methods combined with proteomic fractionations, and sequencing methods that find chemical ... Metabolomics: Scientific study of chemical processes involving metabolites. It is a "systematic study of the unique chemical ...
Graphical depiction of chemical structures". Journal of Chemical Information and Modeling. 30 (3): 237-43. doi:10.1021/ ... "Isolation of pheromone synergists of bark beetle, Pityogenes chalcographus, from complex insect-plant odors by fractionation ... NCI/CADD Chemical Identifier Resolver - resolves or generates SMILES from chemical names, CAS Registry Numbers, InChI/InChIKey ... GIF/PNG-Creator for 2D Plots of Chemical Structures. *JME molecule editor - Chemical editor/viewer and SMILES/SMARTS generator ...
Kreulen, H. P. (June 1976). "Fractionation and winterization of edible fats and oils". Journal of the American Oil Chemists' ... or by chemical processes such as solvent extraction.[46] Cottonseed oil however, is most commonly extracted commercially via ... "Grape Seed Oil Compounds: Biological and Chemical Actions for Health". Nutr Metab Insights. 9: 59-64. doi:10.4137/NMI.S32910 ...
A blood collection program was initiated in the US in 1940 and Edwin Cohn pioneered the process of blood fractionation. He ... John Braxton Hicks was the first to experiment with chemical methods to prevent the coagulation of blood at St Mary's Hospital ... If it is intended to be made into other products, it is typically labeled as recovered plasma or plasma for fractionation. ...
Fractionation of the lanthanide series elements is used to compute ages since rocks were removed from the mantle. ... One of these is the Phoenix lander, which analyzed Martian polar soil for water, chemical, and mineralogical constituents ... These studies explain the chemical changes associated with the major seismic discontinuities in the mantle and show the ... chemical analysis, physical experiments, and numerical modelling. In practical terms, geology is important for mineral and ...
"XXIV.-On chemical analysis by spectrum-observations". Quarterly Journal of the Chemical Society of London. 13 (3): 270. 1861. ... "Lithium isotopic signatures of peridotite xenoliths and isotopic fractionation at high temperature between olivine and ... "IHS Chemicals. February 2012.. *^ Yurkovetskii, A. V.; Kofman, V. L.; Makovetskii, K. L. (2005). "Polymerization of 1,2- ... Krebs, Robert E. (2006). The history and use of our earth's chemical elements: a reference guide. Greenwood Publishing Group. ...
International Chemical Safety Card 0414 (anhydrous ammonia), ilo.org.. *International Chemical Safety Card 0215 (aqueous ... Millar, T. J. (2003). "Deuterium Fractionation in Interstellar Clouds". Space Science Reviews. 106 (1): 73-86. Bibcode:2003SSRv ... "International Programme on Chemical Safety. 1998.. *^ a b c Lan, Rong; Tao, Shanwen (28 August 2014). "Ammonia as a suitable ... 1996). The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals (12th ed.). Merck. ISBN 978-0-911910-12-4.. ...
Types of chemical industry: Agrochemicals - Chemical industry - Organometallic chemistry - Oleochemicals - Paints - ... Fractionation - Reflux - Spectrometry - Sublimation - Titration - Standard addition - Isotope dilution. ... Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds. There ... chemical. properties Alkali metal Alkaline earth metal Lan-thanide Actinide Transition metal Post-​transition metal Reactive ...
A Dictionary of Chemical Engineering. Oxford University Press. *^ 2019. Distillation: The Historical Symbol of Chemical ... In batch distillation, the batch vaporizes, which changes its composition; in fractionation, liquid higher in the fractionation ... In the chemical industry, large amounts of crude liquid products of chemical synthesis are distilled to separate them, either ... a b Othmer, D. F. (1982) "Distillation - Some Steps in its Development", in W. F. Furter (ed) A Century of Chemical Engineering ...
Journal of Chemical Education. 82 (12): 1791. Bibcode:2005JChEd..82.1791B. doi:10.1021/ed082p1791. Archived (PDF) from the ... First is fractionation, with crystallization and separation processes to obtain solid (palm stearin), and liquid (olein) ... Gibon, Véronique (2012). "Palm Oil and Palm Kernel Oil Refining and Fractionation Technology". Palm Oil. pp. 329-375. doi: ... "Grape Seed Oil Compounds: Biological and Chemical Actions for Health". Nutr Metab Insights. 9: 59-64. doi:10.4137/NMI.S32910 ...
... a sequential Sr fractionation scheme was developed for wheat flour matrix. The lipid, water-soluble, and starch fractions were ... A Novel and Validated Chemical-Enzymatic Strontium Fractionation Method for Wheat Flour from Celestite Mining Area: the First ... Erdemir US, Gucer S (2016a) Characterization of copper bioavailability in wheat flour by chemical fractionation and inductively ... Guidelines for terms related to chemical speciation and fractionation of elements. Definitions, structural aspects, and ...
The Canadian Journal of Chemical Engineering. Volume 57, Issue 3, pages 321-326, June 1979 ... Zajic, J. E., Berk, D. and Behie, L. A. (1979), Foam fractionation of spent sulphite liquor: Part I: Separation of surfactants ...
Contact allergy to oak moss: search for sensitizing molecules using combined bioassay-guided chemical fractionation, GC-MS, and ... The method is based on the combination of bioassay-guided chemical fractionation, gas chromatography-mass spectrometry analysis ... Identification of Lilial as a fragrance sensitizer in a perfume by bioassay-guided chemical fractionation and structure- ... In: Smith CK, Hotchkiss SAM (eds) Allergic contact dermatitis: chemical and metabolic mechanisms. Taylor & Francis, London, pp ...
... driven chemical fractionation. This research isolated and identified compounds in heavy fuel oil 7102 (HFO 7102) that are ... driven chemical fractionation combined the chemical separation of oil with toxicity testing and chemical analyses of each ... driven chemical fractionation. Be the first to comment! ... a high energy chemical dispersion of oil in water, which ... Identification of compounds in heavy fuel oil that are chronically toxic to rainbow trout embryos by effects‐driven chemical ...
Fractionation of PDAG fat changes the chemical composition of liquid and solid fractions. In terms of FAC, the major fatty acid ... Studies showed that the properties of fractionated end products can be affected by fractionation processing conditions. In the ... present study, dry fractionation of palm-based diacylglycerol (PDAG) was performed at different: cooling rates (0.05, 0.5, 1.0 ... Fractionation which separates the olein (liquid) and stearin (solid) fractions of oil is used to modify the physicochemical ...
Chemical Fractionation / methods* * Chromatography, High Pressure Liquid / methods* * Humans * Ion Exchange * Mass Spectrometry ... Improved proteomic discovery by sample pre-fractionation using dual-column ion-exchange high performance liquid chromatography ... and reproducible high performance ion-exchange liquid chromatography pre-fractionation method that allows for improved ...
The observed temperature sensitive biochemical fractionation also indicates that divergent biochemical fractionation and not ... Divergent biochemical fractionation, not convergent temperature, explains cellulose oxygen isotope enrichment across latitudes ... The biochemical fractionation changes little between temperatures of 20 and 30°C averaging 26‰ but increases at lower ... On the other hand, the biochemical oxygen isotope fractionation during cellulose synthesis is affected by temperature and can ...
"Chemical Fractionation" by people in this website by year, and whether "Chemical Fractionation" was a major or minor topic of ... "Chemical Fractionation" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... Below are the most recent publications written about "Chemical Fractionation" by people in Profiles. ... Below are MeSH descriptors whose meaning is more general than "Chemical Fractionation". ...
Chemical fractionation of Cu and Zn was carried out in the soil of the 0.0-0.05, 0.05-0.10 and 0.10-0.20m layers (Tessier et al ... and chemical fractionation, which estimates soluble fraction, exchangeable fraction, fraction associated with clay minerals, ... Methods for chemical analysis are used to estimate the Cu and Zn content in the soil. The total content of the two trace ... The physical and chemical attributes were determined in the 0.0-0.05, 0.05-0.10 and 0.10-0.20m layers. Analysis of ...
Oxygen and sulfur isotope fractionation". Chemical Geology. 269 (3-4): 252-261. Bibcode:2010ChGeo.269..252T. doi:10.1016/j. ... Just as the fractionation of oxygen isotopes reveal, the larger fractionations in sulfate from the disproportionation of ... MSO has been found to produce small fractionations in 18O compared to water (~5‰). Given the very small fractionation of 18O ... The fractionation of sulfur and oxygen isotopes during microbial sulfide oxidation (MSO) has been studied to assess its ...
A novel fractionation method, based on both particle size and settling characteristics, was employed to examine metal ... Chemical Fractionation / instrumentation*. Environmental Monitoring / instrumentation*. Equipment Design. Fresh Water / ... A novel fractionation method, based on both particle size and settling characteristics, was employed to examine metal ...
The Separation of Purified Fibrinogen from Fraction I of Human Plasma". Journal of the American Chemical Society. 70 (9): 3103- ... and immunological studies on the products of human plasma fractionation. XVI. Fibrin clots, fibrin films, and fibrinogen ... The Conversion of Human Fibrinogen to Fibrin under Various Conditions1,2". Journal of the American Chemical Society. 69 (2): ... Some Factors Influencing the Quantitative Determination of Fibrinogen1,2". Journal of the American Chemical Society. 69 (11): ...
Ramachandran M. Chemical fractionation of Brucella SPP. Indian Journal of Medical Research. 1971 Feb; 59(2): 307-10. ...
Chemical and enzymatic fractionation of cell walls from Fucales: insights into the structure of the extracellular matrix of ...
Chemical fractionation of carbohydrate and protein composition of corn silages fertilized with increasing doses of nitrogen / ... The chemical composition of the resulting silage was evaluated after silo opening. There was no statistical difference (P 0.05 ... Therefore, nitrogen increases in coverage can alter carbohydrates and GP fractionation of corn silage, with increases in ... this study was to evaluate the effect of increasing levels of nitrogen fertilization in carbohydrate and protein fractionation ...
Early History and Chemical Methods (Fractionation). Blood was first emphasized diagnostically by Hippocrates, who proposed that ... in which chemical fractionation based on protein affinity for derivatized MS targets is used to reduce sample complexity to a ... the era of fractionation (chemical methods), 3) the era of enzymes (biochemical methods), 4) the era of monoclonal antibodies ( ... One was the group of Cohn (6) and Edsall working on the preparation and fractionation of plasma; during the Second World War, ...
Chemical derivatization and fractionation of enriched peptides.. Eight times the bead volume of BEMAD buffer (1.5% ... iTRAQ labeling and fractionation of peptides.. Peptides from the flow-through and three washes of the avidin columns were ... The BEMAD chemical derivatization was performed directly on the solid phase after the tagged peptides were captured by avidin ... Kolb H, Finn M, Sharpless K: Click chemistry: diverse chemical function from a few good reactions. Angew Chem40 :2004 -2021, ...
Two of these methods are foam fractionation, for the separation of molecular species, and… ... Foam fractionation and flotation: There are a few methods that employ foams to achieve separations. In these, the principle of ... Other articles where Foam fractionation is discussed: separation and purification: ... chemical separations. * In separation and purification: Foam fractionation and flotation. There are a few methods that employ ...
Find details about China Chiller for Chemical Industry, Chiller for Fractional Distillation from Air Cooled Chiller for ... Fractionation of Oil - Zhejiang Kingfit Environment Co., Ltd. ... China Air Cooled Chiller for Fractionation of Oil, ... Chiller for Chemical Industry, Chiller for Fractional Distillation, Chiller for Distil manufacturer / supplier in China, ... CE Approved 10RT Air Cooled Chiller for Fractionation of Oil.. Model: QLB40FC;. Cooling capacity: 10RT (35KW);. Inlet chilled ...
This technique is called field-flow fractionation. It has been termed one-phase chromatography because there is no stationary ... Other articles where Field-flow fractionation is discussed: chromatography: Subsequent developments: ... chemical separation and purification. *. In chromatography: Subsequent developments. This technique is called field-flow ... Field-flow fractionation consists of a series of methods based on a field applied perpendicular to a flow stream in a narrow ...
... fractionation is on the pulping of raw materials containing lignocellulose and their fractionation into their basic chemical ... Regenerative Resources , Group Manager Biomass Fractionation. Fraunhofer Center for Chemical-Biotechnological Processes CBP. Am ... Fraunhofer Center for Chemical-Biotechnological Processes CBP - Biomass fractionation. Online in Internet; URL: https://www.igb ... In the biomass fractionation field, we develop new technologies and innovative processes for the processing of wood and ...
Chemical Fractionation; Proximate Analysis; Ash Fusion Temperatures; Chemical Fractionation; Ash Chemistry, etc. Biomass ... Biochemistry ~ Chemical Engineering ~ Chemical Physics Chemical Senses ~ Chemistry of Brewing ~ Ceramics & Clays Clinical ... Chemicals FOR OVER 100 CHEMICAL DATABASES SEE THE CHEMICALS & BIOCHEMICALS First Year Chemistry: Courses,. Lectures, ... Journal of the American Chemical Society Chemical Research in Toxicology Analytical Chemistry Chemical & Engineering News ...
Biorefinary products Cellulosic bioethanol Biplastics Biodiesel Pr Fine and bulk Biogas ab chemicals Syngas ud Oleo chemicals ... Biorefinary (Technology Base ) Petroleum Refineries Biorefinary Pr a. Distillation a. Biomass fractionation ab b. Thermo ... ud We are in talk with Agro Chemicals Policy group dh to implement Biofertilizer and Biopesticides in M chemical manufacturing ... We can also make biofertilizer from Blue Green Algae . Pr ab Some companies are involve in making oleo ud chemicals from algae ...
"Diffusive fractionation of volatiles and their isotopes during bubble growth in magmas, Contributions to Mineralogy and ... Isotope fractionation by chemical diffusion between molten basalt and rhyolite. Richter, FM; Davis, AM; DePaolo, DJ; Watson, EB ... Magnesium isotope fractionation in silicate melts by chemical and thermal diffusion. Richter, FM; Watson, EB; Mendybaev, R; ... Isotopic fractionation of chlorine during chemical diffusion in a dacitic melt and its implications for isotope behavior during ...
Fractionation of barium based on chemical composition. Further experiments were applied for evaluating the fractionation of ... The chemical analysis of Brazil nuts is not trivial due to their complex matrix. The fractionation of barium in Brazil nuts was ... Fractionation of barium based on solubility. The fractionation of barium compounds based on their solubility was carried out ... The fractionation procedure may involve properties of the chemical species, such as size, solubility, affinity, hydrophobicity ...
Subcellular fractionation and chemical crosslinking. Request a detailed protocol Cells were cultured on a 10 cm dish to 80-90% ... subcellular fractionation combined with chemical crosslinking was performed. In preliminary experiments with recombinant ... Chemical crosslinking in vitro. Request a detailed protocol 5 µM of recombinant CHIP were crosslinked with 0.025% ... 20 × 106 cells/ml suspension was lysed in subcellular fractionation buffer (SF: 250 mM sucrose, 20 mM HEPES KOH pH 7.5, 10 mM ...
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; 14C; Soil carbon stabilization; Selective chemical dissolution; Soil fractionation; ... Chemical Geology Here, soil erosion continuously redistributes soil and associated soil organic matter (SOM) on the Earths ... the amount of Fe and Al in operationally-defined poorly crystalline and organically-complexed phases using selective chemical ... the amount of Fe and Al in operationally-defined poorly crystalline and organically-complexed phases using selective chemical ...
Chemical composition distribution (CCD). Crystallization analysis fractionation (Crystaf). Modeling. Olefin block copolymers ( ... A study on chemical composition distribution (CCD) of linear low density polyethylene (LLDPE) using crystallization analysis ... A study on chemical composition distribution (CCD) of linear low density polyethylene (LLDPE) using crystallization analysis ... fractionation (Crystaf) Title alternative การศึกษาการกระจ
Toxicity and mutagenicity of Upper Danube River sediments determined by chemical fractionation, the Danio rerio embryo assay, ... Fractionation of each of the four sediment samples was performed by separating compounds according to their polarity, planarity ... In this study, four sediment extracts from the Upper Danube River in Germany were used with a novel fractionation technique to ... Taken as a whole, these results show the value of using multiple bioassays and fractionation to characterize sediments that ...
Relation between Physical-Chemical Protein Properties and Fractionation/Identification. We analyzed several of the physical- ... Linking the Physical-Chemical Properties of the Identified Processed (Mature) Proteins to the Sequential Fractionation. ... Details about protein fractionation can be extracted for those proteins that are identified experimentally by our lab. When ... Physical-chemical properties were calculated for processed proteins, based on cleavage site prediction by TargetP (for the cTPs ...
  • This technique is called field-flow fractionation. (britannica.com)
  • Field-flow fractionation consists of a series of methods based on a field applied perpendicular to a flow stream in a narrow channel. (britannica.com)
  • Asymmetric flow field flow fractionation (AF4) an analytical technique to separate larger molecules, aggregates and particles based on their size. (wur.nl)
  • The asymmetric flow field flow fractionation (AF4) is a technique to separate larger molecules (e.g. proteins, polysaccharides), aggregates (e.g. heat induced protein aggregates) and particles based on their size. (wur.nl)
  • On the other hand, the biochemical oxygen isotope fractionation during cellulose synthesis is affected by temperature and can be described by a 2(nd) order polynomial equation. (nih.gov)
  • For volatile species whose isotope mass effects on diffusion have been measured (Cl, Li), predicted isotope fractionation in the exsolved vapor can be as large as −4‰ for Cl and −25‰ for Li. (deepdyve.com)
  • These ratios are called mass dependent isotope fractionation and are the way sulfur fractionates today. (astrobio.net)
  • The isotopic composition of xenon in the Archean atmosphere has evolved through time by mass-dependent fractionation from a precursor comprising cometary and solar/chondritic contributions (referred to as U-Xe). (sciencemag.org)
  • Xe trapped in barite and in fluid inclusions in hydrothermal quartz of Archean ages present Xe isotopic ratios intermediate between modern atmospheric Xe and planetary precursors, showing that atmospheric evolution as a result of mass-dependent fractionation (MDF) was a protracted process still ongoing during the Archean eon [see the study of Avice et al . (sciencemag.org)
  • Surprisingly, both samples' sulfur isotope ratios fall in the mass-dependent fractionation range and do not show the signal of an oxygenless atmosphere. (astrobio.net)
  • A method combining liquid/liquid extraction and chromatographic fractionation has been developed for the preparation of pure monophenyltin (MPhT), diphenyltin (DPhT), and triphenyltin (TPhT), synthesized from isotope-enriched Sn metal using phenylation of SnI(4) in diethylether (DEE) followed by quenching with HBr and water. (diva-portal.org)
  • The manuscript then takes a look at fractional solution, chromatographic fractionation, and gel permeation chromatography. (google.com.au)
  • Do you do regular water changes, use chemical filtrants, have adequate foam fractionation? (wetwebmedia.com)
  • Chemical Fractionation" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (ucdenver.edu)
  • Recent findings based on the oxygen isotope ratios of tree trunk cellulose indicate that the temperature of biomass production in biomes ranging from boreal to subtropical forests converge to an average leaf temperature of 21.4°C. The above conclusion has been drawn under the assumption that biochemically related isotopic fractionations during cellulose synthesis are not affected by temperature. (nih.gov)
  • The enrichment approach was combined with solid-phase chemical derivatization and isotopic labeling to detect O-GlcNAc modification sites and to compare site-specific O-GlcNAc occupancy levels between normal and diabetic erythrocyte proteins. (diabetesjournals.org)
  • This raises the possibility that the character of volatile components in bubbles may not reflect that of volatiles dissolved in the host melt over the lifetime of a bubble-even in the absence of equilibrium vapor/melt isotopic fractionation. (deepdyve.com)
  • Isotopic fractionation of chlorine during chemical diffusion in a dacitic melt and its implications for isotope behavior during bubble growth (abstract), 2016 Fall AGU Meeting, 2016)], so there is a clear need to understand the efficacy of diffusive fractionation during bubble growth. (deepdyve.com)
  • For plausible decompression paths, R increases exponentially with time-leading, potentially, to larger isotopic fractionation of species partitioned into the growing bubble. (deepdyve.com)
  • The main objective in the field of biomass fractionation is to establish processes for a biomass biorefinery in Germany and throughout Europe. (fraunhofer.de)
  • In the biomass fractionation field, we develop new technologies and innovative processes for the processing of wood and oilseeds in order to use the biomass holistically and to obtain value-added products. (fraunhofer.de)
  • Information about the technical equipment for biomass fractionation. (fraunhofer.de)
  • The focus of the lignocellulose biorefinery is the pulping of lignocellulosic raw materials and the fractionation of biomass into its basic chemical components lignin and sugars or fibers. (fraunhofer.de)
  • Lignocellulosic biomass has proven to be a promising renewable feedstock for bio-based fuels, chemicals and materials. (soci.org)
  • There are several methods by which the raw feedstock can be pre-treated, the aim being to disrupt the structure of the lignocellulose to facilitate the microbial action that converts the biomass cell-wall components into biofuels and chemicals. (soci.org)
  • In addition research could be focused on the development of novel green solvents which could lead to clean biomass fractionation. (soci.org)
  • Lignocellulosic biomass is a composite material comprising cellulose, hemicellulose and lignin and is a target feedstock for the bio-based chemicals. (aiche.org)
  • The method is based on the combination of bioassay-guided chemical fractionation, gas chromatography-mass spectrometry analysis and structure-activity relationship studies. (springer.com)
  • IUPAC GOLD BOOK - International Union of Pure and Applied Chemistry Multimedia IUPAC Compendium of Chemical Terminology - the Gold Book (Text & Images). (martindalecenter.com)
  • Kaye and Laby, "Table of Physical and Chemical Constants," January 2012, http://www.kayelaby.npl.co.uk/chemistry/3_1/3_1_3.html . (hindawi.com)
  • An effects‐driven chemical fractionation combined the chemical separation of oil with toxicity testing and chemical analyses of each fraction to identify the major classes of compounds associated with embryo toxicity. (environmental-expert.com)
  • Toxicity was assessed with two exposure methods, a high energy chemical dispersion of oil in water, which included oil droplets in test solutions, and water accommodated fractions produced by oiled gravel desorption columns, which did not contain visible oil droplets. (environmental-expert.com)
  • Fractionation of fulvic acid by iron and aluminum oxides--influence on copper toxicity to Ceriodaphnia dubia. (ucdenver.edu)
  • The fractionation of barium in Brazil nuts was studied owing to the toxicity of this element and the strong correlation between chemical form and absorption. (scielo.br)
  • Toxicity and mutagenicity of Upper Danube River sediments determined by chemical fractionation, the Danio rerio embryo assay, the Ames fluctuation test and the H295R assay. (usask.ca)
  • More than one hundred short-term bioassays are now available for detecting the toxicity, mutagenicity, and potential carcinogenicity of chemicals. (indigo.ca)
  • At present, toxicity in water bodies, including rivers, can be evaluated by analyzing the structure and abundance of biological communities, by measuring concentrations of chemicals that can be related to contaminant bioavailability and adverse effects and/or by direct assessing of toxicity using bioassays. (frontiersin.org)
  • To this end, we report the development of a robust, rapid, and reproducible high performance ion-exchange liquid chromatography pre-fractionation method that allows for improved proteomic detection coverage of complex biological specimens using basic tandem mass spectrometry screening procedures. (nih.gov)
  • Although the biological oxidation of reduced sulfur compounds competes with abiotic chemical reactions (e.g. the iron-mediated oxidation of sulfide to iron sulfide (FeS) or pyrite (FeS2)), thermodynamic and kinetic considerations suggest that biological oxidation far exceeds the chemical oxidation of sulfide in most environments. (wikipedia.org)
  • Taken as a whole, these results show the value of using multiple bioassays and fractionation to characterize sediments that covers a variety of different biological endpoints. (usask.ca)
  • In a batch treatment system, a volume of wastewater is gathered, treated by chemical / physical / biological means, and discharged. (environmental-expert.com)
  • As in other fields of biological Sciences, humic matter in isolation are the result of a chemical extraction from the soil organic matter , and represent the humic molecules distributed in the soil. (wikipedia.org)
  • Thus, cost effectiveness and technical feasibility dictate stepwise and perhaps iterative application -of both chemical and biological methods in evaluating the health effects of complex environmental mixtures. (indigo.ca)
  • Through the coupling of reliable biological detection systems with methods of chemical fractionation and analysis, it is frequently possible to isolate the individual chemical species that show biological activity. (indigo.ca)
  • The results of such short-term screening bioassays then may be used td guide the course of further fractionation and to determine the need for more stringent and comprehensive biological testing. (indigo.ca)
  • In other words, a chemical speciation model of the biological fluid itself is necessary prior to any investigation on the speciation of any other component in that fluid. (hindawi.com)
  • Biological fractionation of stable isotopes. (caltech.edu)
  • Physical, chemical, biological and geological processes in the oceans and their interactions are studied in this course. (dartmouth.edu)
  • The first approach is typically time-consuming and expensive, while the chemical measurements can be hard to extrapolate into biological systems and may lead to misinterpretation. (frontiersin.org)
  • Diffusive fractionation of volatiles and their isotopes during bubble growth in magmas Watson, E. 2017-07-07 00:00:00 Bubbles grow in decompressing magmas by simple expansion and by diffusive supply of volatiles to the bubble/melt interface. (deepdyve.com)
  • The degree of mass fractionation of Xe isotopes relative to the modern atmosphere can provide a time stamp for dating Archean kerogens and therefore narrowing the time window for the diversification of early life during the Archean eon. (sciencemag.org)
  • Hiserodt RD, Swijter DFH, Mussinan CJ (2000) Identification of atranorin and related potential allergens in oak moss absolute by high-performance liquid chromatography-tandem mass spectrometry using negative ion atmospheric pressure chemical ionization. (springer.com)
  • Generally, scientists attributed this abnormal fractionation to atmospheric chemical reactions. (astrobio.net)
  • In this study, a sequential Sr fractionation scheme was developed for wheat flour matrix. (springer.com)
  • A sequential chemical fractionation called Humeomics can be used to isolate more homogeneous humic fractions and determine their molecular structures by advanced spectroscopic and chromatographic methods. (wikipedia.org)
  • Sequential extraction procedures were used to assess selective chemical fractions of Pb in the soil. (mdpi.com)
  • Methods for chemical analysis are used to estimate the Cu and Zn content in the soil. (scielo.br)
  • Furthermore, disruptions of steroidogenesis were assessed by first establishing methods and a proof of concept of the H295R assay by exposing H295R cells to 7 model chemicals and measuring changes from a control in estradiol, testosterone and aromatase activity. (usask.ca)
  • Covers pools of organic matter in soils, transformations, methods of extraction and fractionation. (powells.com)
  • The book elaborates on thermal diffusion and turbidimetric titration, as well as methods of fractionation, studies of the variables, outline of the method and range of application, and elaboration of the method. (google.com.au)
  • One of the major research interests at the Institute of Pharmacy/Pharmacognosy in Innsbruck is dedicated to the target-oriented search of bioactive plant constituents combining classical pharmacognostic methods (bioguided fractionation, ethnopharmacological approach) and modern in silico tools (pharmacophore based virtual screening). (uibk.ac.at)
  • A microchip laboratory system and method proved fluid manipulations for a variety of applications, including sample injection for microchip chemical separations. (google.com)
  • Collection, Chemical Fractionation, and Mutagenicity Bioassay of Ambient Air Particulate. (indigo.ca)
  • Distillation cuts were subjected to chemical fractionation, in vitro bioassay and initial chemical analysis. (unt.edu)
  • In this context, chemical speciation is important for identification of the chemical forms of elements in foods, such as the oxidation states and formation of complexes. (scielo.br)
  • Guidelines for terms related to chemical speciation and fractionation of elements. (hindawi.com)
  • Chemical speciation studies in real systems are usually very complex, due to the wide number of interactions that must be taken into account, which lead to the formation of several species of different stability [ 1 - 7 ]. (hindawi.com)
  • Unfortunately, the simple preparation and use of an artificial medium is not sufficient when performing rigorous chemical speciation studies. (hindawi.com)
  • Furthermore, assuming that a speciation model of the fluid is available, the above-cited variability of conditions makes also the assessment of their effect on the speciation necessary: the dependence of the stability and the distribution of various species on chemical ( e.g. , kind and concentration of components, ionic strength, and pH) and/or physical ( e.g. , temperature) parameters must be known to build accurate speciation models. (hindawi.com)
  • Native Fixed Ammonium and Chemical Reactions of Organic Matter with Ammonia and Nitrite. (powells.com)
  • Reactions between sulfate-rich seawater and organic material in the sediment during the formation of sedimentary rock layers might produce sulfur with mass independent fractionation. (astrobio.net)
  • Fractionation of PDAG fat changes the chemical composition of liquid and solid fractions. (peerj.com)
  • The chemical composition of the resulting silage was evaluated after silo opening. (bvsalud.org)
  • Extraction, Fractionation, and General Chemical Composition of Soil Organic Matter. (powells.com)
  • Chemical Composition and Evolution of the Mantle. (booktopia.com.au)
  • Therefore, nitrogen increases in coverage can alter carbohydrates and GP fractionation of corn silage, with increases in soluble fiber, GP, and pH, and reduction in the protein indigestible fraction. (bvsalud.org)
  • Chemical nitrogen fractionation in dense molecular clouds. (u-strasbg.fr)
  • Contains new chapters on NMR spectroscopy, analytical pyrolysis and on chemical structures. (powells.com)
  • We applied this method to demonstrate viable separation of subgroups of cells with different mechanical properties from complex mixtures, including fractionation according to cancer cell type, cell cycle stage, cell viability status, and leukocyte nuclear phenotype. (elsevier.com)
  • Initially, complex mixtures may be separated and bioassayed in carefully defined chemical fractions. (indigo.ca)
  • APS JOURNALS ONLINE - American Physical Society Multimedia Chemical Physics Journals (Text & Images). (martindalecenter.com)
  • During convective bubble growth, the presence of a discrete (physical) melt boundary layer against the growing bubble (of width x BL) simplifies outcomes because it leads to the quick onset of steady-state fractionation during growth, the magnitude of which depends mainly upon R∙x BL/D L and D H/D L (bubble/melt fractionation is maximized at R∙x BL/D L ≈0.1). (deepdyve.com)
  • The Blake group (with links to current and past members) applies innovative spectroscopic tools to investigate the chemical and physical processes that operate in natural environments ranging from the interstellar medium to the heart of living cells. (caltech.edu)
  • Systematic introduction to the physical and chemical processes that have shaped Earth as a planet over geological time, and the observable products of these processes-rock materials, minerals, land forms. (caltech.edu)
  • Fractionation which separates the olein (liquid) and stearin (solid) fractions of oil is used to modify the physicochemical properties of fats in order to extend its applications. (peerj.com)
  • The PSC methodology and tFMSA device can advance a better understanding of complex factors affecting mechanical cell fractionation and provide a miniature platform for obtaining rationally designed cell fractions for biomedical applications. (elsevier.com)
  • Additionally, as a first approach, a fractionation procedure can be applied to identify different classes of an element in a food. (scielo.br)
  • For this, we provide cellular models that allow the screening and bio-guided fractionation of extracts aiming to isolate in vitro anti-inflammatory compounds (i.e. by luciferase reporter gene assays). (uibk.ac.at)
  • Here we test the above assumption by heterotrophically generating cellulose at different temperatures and measuring the proportion of carbohydrate oxygen that exchange with water during cellulose synthesis and the average biochemical fractionation associated with this exchange. (nih.gov)
  • This temperature sensitive biochemical fractionation explains the pattern of cellulose oxygen isotope ratios of aquatic plants encompassing several latitudes. (nih.gov)
  • The observed temperature sensitive biochemical fractionation also indicates that divergent biochemical fractionation and not convergent leaf temperature explains the increase in oxygen isotope enrichment of cellulose across several biomes. (nih.gov)
  • Although chemical analysis can be used to detect known hazardous compounds, it would be a staggering and expensive task to analyze large numbers of samples for all known or suspected hazardous constituents. (indigo.ca)
  • The selection is a valuable source of information for readers interested in polymer fractionation. (google.com.au)
  • Leaching and degradation of plasticizers and polymers are complex phenomena dependent on environmental conditions in the landfill and the chemical properties of each additive. (royalsocietypublishing.org)
  • Topics include polydispersity of high polymers, phase relations for polydisperse systems, fractionation theory and efficiency, and fractionation by solvent evaporation. (google.com.au)
  • An integrated pilot plant is available for the investigation and development of fractionation and downstream processing technologies, e.g. for the pulping using organic solvents under pressure and temperature, the so-called Organosolv technique. (fraunhofer.de)
  • Fractionation of each of the four sediment samples was performed by separating compounds according to their polarity, planarity, and the size of the aromatic ring system in an on-line fractionation procedure on coupled high performance liquid chromatography columns. (usask.ca)
  • Customer Canadian company leading producer of specialty metals and chemical products, such as tellurium, cadmium and selenium and related compounds. (environmental-expert.com)
  • 1999). Their characteristic of lipophilicity, low water solubility and adsorption to marine particles and sediments makes them a potentially dangerous group of chemicals and a threat to the environment and its bioresources (Macias-Zamora et al . (bioline.org.br)
  • Bağdat Yaşar S, Baran EK, Tokay F (2013) Element fractionation analysis for milk in its real matrix by inductively coupled plasma optical emission spectrometry. (springer.com)
  • Bağdat S, Baran EK, Tokay F (2014) Element fractionation analysis for infant formula and food additives by inductively coupled plasma optical emission spectrometry. (springer.com)
  • The chemical analysis of Brazil nuts is not trivial due to their complex matrix. (scielo.br)
  • For the most part these advances have been driven by technological considerations, but the application of state-of-the-art chemical techniques to astrophysics and to the earth and planetary sciences holds the potential to revolutionize the analysis of complex natural materials. (caltech.edu)
  • Chemical analysis of the fecal extract of B. germanica revealed 40 VCAs. (pnas.org)
  • and chemical fractionation, which estimates soluble fraction, exchangeable fraction, fraction associated with clay minerals, fraction associated with organic matter and residual fraction. (scielo.br)
  • Borght AVD, Goesaert H, Veraverbeke WS, Delcour JA (2005) Fractionation of wheat and wheat flour into starch and gluten: overview of the main processes and the factors involved. (springer.com)
  • The focus is on wood pulping and fractionation processes, alternative processing lines for oilseeds, as well as their up-scaling to pilot scale. (fraunhofer.de)
  • Furthermore, several innovations in manufacturing processes (e.g. improvement of yield), product developments (e.g. such as subcutaneous IG, IVIg 10% concentration, and IVIg liquid presentation), presence of advanced virus removal technologies (such as nanofiltration), and the development of newer plasma products such as ceruloplasmin and IgA are also supporting the growth of the plasma fractionation market in these regions. (marketsandmarkets.com)
  • Earth-based observations, observations by planetary spacecraft, study of meteorites, and observations of extrasolar planets are used to constrain models of the dynamical and chemical processes of planetary systems. (caltech.edu)
  • VCAs may reflect the gut microbiota and, in turn, the cockroach's local environment, explaining why divergent chemical structures have been proposed as aggregation pheromones. (pnas.org)
  • Airborne concentrations and chemical considerations of radioactive ruthenium from an undeclared major nuclear release in 2017. (nih.gov)
  • The ultimate goal of this work is a detailed understanding of the evolution of molecular diversity from atoms in the interstellar medium or from simple chemical precursors in laboratory syntheses to complex molecules and aggregates throughout the solar system, in life, and in the devices utilized by man. (caltech.edu)
  • The chemical potential gradients caused by the initial assemblage appear at the far end of the melt column because that is the finite boundary condition for the diffusive supply of ions to the crystallization front. (arizonageologicalsoc.org)
  • 1000). These chemicals can penetrate into cells, chemically interact with biologically important molecules and may disrupt the endocrine system. (royalsocietypublishing.org)
  • Such chemicals are categorized into two groups: (i) hydrophobic chemicals that are adsorbed from surrounding seawater owing to affinity of the chemicals for the hydrophobic surface of the plastics and (ii) additives, monomers and oligomers of the component molecules of the plastics. (royalsocietypublishing.org)
  • In soils from four sites spanning three soil orders, we quantified the amount of Fe and Al in operationally-defined poorly crystalline and organically-complexed phases using selective chemical dissolution applied to the soil fraction containing mineral-associated carbon. (osti.gov)
  • This is particularly apparent with viable cell fractionation, where cells retain their native deformability. (elsevier.com)
  • Erdemir US, Gucer S (2016a) Characterization of copper bioavailability in wheat flour by chemical fractionation and inductively coupled plasma-mass spectrometry. (springer.com)
  • Studies have shown that the bioavailability of elements to humans depend on their chemical form. (scielo.br)
  • Several sample preparation strategies were employed for determination and fractionation of barium in Brazil nuts using measurements by graphite furnace atomic absorption spectrometry (GF AAS) and inductively coupled plasma optical emission spectrometry with axial view (ICP OES). (scielo.br)
  • it gives a good, broad perspective on the variable and yet ordered structures shown by glycoproteins and proteoglycans, and a thorough chemical overview of what can and cannot be done to the intact glycoproteins and their isolated glycopeptides. (elsevier.com)
  • Diner avec les membres de l'équipe (passés et presents) pendant la Goldschmidt à Paris en 2017. (ipgp.fr)
  • The photochemical reaction of volcanic sulfur dioxide may not be the only method of creating a mass independent fractionation of sulfur. (astrobio.net)
  • The plasma fractionation market is largely driven by the growing use of immunoglobulins in various therapeutic areas, increase in plasma collection (and the number of plasma collection centers), and the increasing use of alpha-1-antitrypsin. (marketsandmarkets.com)
  • AIChE JOURNAL ONLINE - American Institute of Chemical Engineeers (AIChE) Multimedia Chemical Engineering Journal (Text & Images). (martindalecenter.com)
  • Chiller for Chemical Industry, Chiller for Fractional Distillation, Chiller for Distil manufacturer / supplier in China, offering Air Cooled Chiller for Fractionation of Oil, Flake Ice Machine for Industry, Kf Cooling Tower and so on. (made-in-china.com)
  • 2 However, over the past 50 years an increasing body of evidence has accumulated indicating that several environmental chemicals exist that also have oestrogenic and/or potentially antioestrogenic effects both on aquatic and land based wildlife, and on humans. (bmj.com)
  • This study also demonstrates the usefulness of the H295R assay when combined with a new fraction technique to assess endocrine disrupting chemicals in sediment samples. (usask.ca)
  • 300 Pages Report] The plasma fractionation market is projected to reach USD 34.9 billion by 2024 from USD 25.4 billion in 2019, at a CAGR of 6.6% during the forecast period. (marketsandmarkets.com)
  • But rocks dating before 2.4 billion years ago have abnormal ratios, or exhibit mass independent fractionation. (astrobio.net)