Separation of a mixture in successive stages, each stage removing from the mixture some proportion of one of the substances, for example by differential solubility in water-solvent mixtures. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Techniques to partition various components of the cell into SUBCELLULAR FRACTIONS.
Separation of molecules and particles by a simultaneous action of carrier liquid flow and focusing field forces (electrical, sedimentation, or thermal), without a stationary phase.
Components of a cell produced by various separation techniques which, though they disrupt the delicate anatomy of a cell, preserve the structure and physiology of its functioning constituents for biochemical and ultrastructural analysis. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p163)
The composition, conformation, and properties of atoms and molecules, and their reaction and interaction processes.
The sum of the weight of all the atoms in a molecule.
Theoretical representations that simulate the behavior or activity of chemical processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
The rate dynamics in chemical or physical systems.
Methodologies used for the isolation, identification, detection, and quantitation of chemical substances.
Techniques used to separate mixtures of substances based on differences in the relative affinities of the substances for mobile and stationary phases. A mobile phase (fluid or gas) passes through a column containing a stationary phase of porous solid or liquid coated on a solid support. Usage is both analytical for small amounts and preparative for bulk amounts.
The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.
An acquired disorder characterized by recurrent symptoms, referable to multiple organ systems, occurring in response to demonstrable exposure to many chemically unrelated compounds at doses below those established in the general population to cause harmful effects. (Cullen MR. The worker with multiple chemical sensitivities: an overview. Occup Med 1987;2(4):655-61)
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.
Administration of the total dose of radiation (RADIATION DOSAGE) in parts, at timed intervals.
The profession of writing. Also the identity of the writer as the creator of a literary production.
The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation.
Collections of facts, assumptions, beliefs, and heuristics that are used in combination with databases to achieve desired results, such as a diagnosis, an interpretation, or a solution to a problem (From McGraw Hill Dictionary of Scientific and Technical Terms, 6th ed).
The guidelines and policy statements set forth by the editor(s) or editorial board of a publication.
Intentional falsification of scientific data by presentation of fraudulent or incomplete or uncorroborated findings as scientific fact.
"The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.
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 ...
Get Assorted Magnetic Stir Bar Packs at Spectrum Chemical. SpectrumChemical.com carries a full line of fine chemicals, lab appliances and lab suppl Spectrum Chemical has a complete line of laboratory supplies, equipment and safety items.
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 ...
Abstract. The optimum extraction conditions of polysaccharides from roxburgh rose (Rosa roxburghii Tratt.) leaves (RLP) were obtained by response surface methodology (RSM), which were a liquid to solid ratio of 21.16 mL/g, an extraction temperature of 81.32 °C, and an extraction time of 90.49 min. An RLP yield of 11.04% was obtained under these conditions. DEAE-52 cellulose and Sepharose CL-6B columns were used to purify the RLP, and the purified polysaccharide components RLP-1.2 and RLP-2.1 were obtained. Both RLP-1.2 and RLP-2.1 were composed of galacturonic acid (GalA), glucose (Glc), galactose (Gal), and arabinose (Ara). However, the molar ratios of GalA, Glc, Gal, and Ara in RLP-1.2 and RLP-2.1 were different. At a concentration of 10 mg/mL, the α-amylase inhibitory activities of RLP-1.2 and RLP-2.1 reached 80.74% and 89.85% that of acarbose, respectively, and the α-glucosidase inhibitory activity of RLP-1.2 reached 87.91% that of acarbose. In addition, both RLP-1.2 and RLP-2.1 showed ...
Objectives : This study was performed to compare the differences between decoctions extracted by different extraction method and extraction time. Methods : Decoctions were prepared with pressed or non-pressed extraction conditions for 60, 120 and 180min. The yields of extracts, sugar contents, hydrogen ion concentrations(pH), the contents of reference compounds in Yukmijihwang-tang(Liuweidihuang-tang) were investigated. Results : The yields and the dissolved solid content containing sugar content of decoctions were more in pressed extraction method than unpressed extraction method, and they tended to be increased as extraction time increased. The pH values of decoctions methods did not show significant differences between pressed and unpressed extraction methods or extraction times. Most of reference compounds showed higher contents in pressed extraction method than unpressed extraction method and their contents were augmented according to increase of extraction time. The content of paeonol was ...
Purification and desalting of protein and peptide samples by three-well OFFGEL electrophoresis with immobilized ultra narrow pH gradient gels is proposed as a fast preparative strategy for proteomics. The gist of this strategy is to separate proteins and peptides according to their isoelectric points and to
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.
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 ...
OBJECTIVES: The purpose of this study was to analyze the effects of soybean extracts obtained using different extraction methods on the skin of female rats. ...
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.
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 ...
May 15, 2017). "A molecular zoom into soil Humeome by a direct sequential chemical fractionation of soi". The Science of the ... A sequential chemical fractionation called Humeomics can be used to isolate more homogeneous humic fractions and determine ... However, single classes of residual biomolecules have been identified by selective extractions and chemical fractionation, and ... 2 Chemical characteristics of humic substances in nature. *3 Chemical characteristics of traditionally produced humic ...
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 ...
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 ...
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 ...
"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 ...
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- ...
"Advanced fractionation technology for the oleochemical industry". Asia-Pacific Journal of Chemical Engineering. 2 (4): 315-321 ...
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 ...
... chemical ecologists often make use of bioassay-guided fractionation. Today, chemical ecologists also incorporate genetic and ... the Max Planck Institute of Chemical Ecology was founded in Jena, Germany. Chemical defense Semiochemical Chemical ecologists ... Marine chemical ecology is how organic life in the marine environment use chemicals to eat, interact, reproduce and survive, ... Plants mobilize chemical defenses to resist invasion by pathogens. Chemical signals are also important in the establishment and ...
... 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 ...
"XXIV.-On chemical analysis by spectrum-observations". Quarterly Journal of the Chemical Society of London. 13 (3): 270. 1861. ... Nuclear weapons manufacture and other nuclear physics applications are a major source of artificial lithium fractionation, with ... stone') is a chemical element with the symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard ... Chemical resemblances between the two metals include the formation of a nitride by reaction with N2, the formation of an oxide ...
Utilizing the then new techniques of ultra-centrifugation and chemical fractionation, Smadel made significant contributions to ...
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 ...
"Chemical Processing (online). Retrieved 2015-02-02.. *^ United States Bureau of Public Roads (1921): "Standard and tentative ... 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 ... Ludwig, Ernest E (1997). "Distillation (Chapter 8), and Packed Towers (Chapter 9)". Applied Process Design for Chemical 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. ...
"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 ...
... foam fractionation, chemical flocculation, and constructed wetlands. But because of the impracticality and / or high costs of ...
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 ...
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- ...
... 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 ...
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 ...
Using fractionation or recrystallization, they separated an active ingredient from the crude preparation, and compounded a ... Crude drugs, like opium, are from natural sources and usually contain several chemical compounds. The pharmacist extracted ...
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 ...
X. Wang, C. Zhi, L. Li, H. Zeng, C. Li, M. Mitome, D. Golberg and Y. Bando : «„Chemical Blowing" of Thin-Walled Bubbles: High- ... Y. Lau, M. Yamaguchi, X. Li, Y. Bando, D. Golberg, F. Winnik : «Length fractionation of boron nitride nanotubes using creamed ... Q. Huang, Y. Bando, C. Zhi, D. Golberg, K. Kurashima, F. Xu and L. Gao : «Chemical Peeling and Branching of Boron Nitride ... C. Tang, Y. Bando, G. Shen, C. Zhi and D. Golberg : «Single-source precursor for chemical vapour deposition of collapsed boron ...
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 ...
Level A Equivalent-Totally Encapsulating Chemical- and Vapour-Protective Suit *Designed for environments that are immediate ... 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. .. ...
... 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. ...
Schedules for fractionationEdit. 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 ... FractionationEdit. This section only applies to photon radiotherapy although other types of radiation therapy may be ...
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.. ...
... 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 ...
CHEMICAL, CLINICAL, AND IMMUNOLOGICAL STUDIES ON THE PRODUCTS OF HUMAN PLASMA FRACTIONATION. XI. THE USE OF CONCENTRATED NORMAL ... CHEMICAL, CLINICAL, AND IMMUNOLOGICAL STUDIES ON THE PRODUCTS OF HUMAN PLASMA FRACTIONATION. XI. THE USE OF CONCENTRATED NORMAL ... CHEMICAL, CLINICAL, AND IMMUNOLOGICAL STUDIES ON THE PRODUCTS OF HUMAN PLASMA FRACTIONATION. XI. THE USE OF CONCENTRATED NORMAL ...
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" 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". ...
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 ...
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 ...
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, ...
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 ...
Associations of Dose Fractionation with chemical compounds. *In vivo radiosensitizing activity of a new fluorinated hypoxic ... Anatomical context of Dose Fractionation. *The relative importance of the effects of dose rate, dose fractionation, and prior ... Disease relevance of Dose Fractionation. *We conducted a dose fractionation study of neutropenic, corticosteroid- ... dose fractionation, sex, and cell stage on the mutagenic action of a chemical [6]. ...
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 ...
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 ...
Lemos, P. A. D. C., Mendes, B. S., & Gonçalves, M. M. B. P. (2010, Jan 1). Fractionation and Chemical Characterization of ... Fractionation and Chemical Characterization of Biooil from the Pyrolysis of Chicken Beds. / Lemos, Paulo Alexandre da Costa; ... Lemos, PADC, Mendes, BS & Gonçalves, MMBP 2010, Fractionation and Chemical Characterization of Biooil from the Pyrolysis of ... Fractionation and Chemical Characterization of Biooil from the Pyrolysis of Chicken Beds. 2010. ...
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 ...
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 ...
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 ...
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 ...
3. Isolation and fractionation. 4. Physico-chemical characterisation. 5. Analysis of constituents. 6. Structural analysis. 7. ... and a thorough chemical overview of what can and cannot be done to the intact glycoproteins and their isolated glycopeptides. @ ...
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  • 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)
  • 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)
  • 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)
  • 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)
  • Foam fractionation is a chemical process in which hydrophobic molecules are preferentially separated from a liquid solution using rising columns of foam. (wikipedia.org)
  • Whilst protein skimmers have been common place in aquaria for many years, it was not until the 1960s that a concerted effort was made by Robert Lemlich of the University of Cincinnati to characterise a model of adsorptive bubble separation processes, of which foam fractionation is one example. (wikipedia.org)
  • Until the mid-2000s, there was very little further development of foam fractionation or attempts to understand the underlying physics of the process. (wikipedia.org)
  • Foam fractionation is closely related to the allied process of froth flotation in which hydrophobic particles attach to the surface of bubbles which rise to form a pneumatic (i.e. rising) foam. (wikipedia.org)
  • It was research into the froth phase of froth flotation conducted at the University of Newcastle, Australia, specifically into the prediction of liquid fraction and liquid flux in a pneumatic foam, that enabled a preliminary mechanistic description of foam fractionation. (wikipedia.org)
  • The synergies between foam fractionation and froth flotation have been explored in a 2009 special issue of the Asia Pacific Journal of Chemical Engineering. (wikipedia.org)
  • Robert Lemlich showed how foam fractionation columns can be operated in stripping, enriching, or combined modes (depending on whether the feed is sent to the top, bottom or middle of the column), and can be operated with or without an external reflux stream at the top of the column. (wikipedia.org)
  • Foam fractionation proceeds via two mechanisms: The target molecule adsorbs to a bubble surface, and The bubbles form a foam which travels up a column and is discharged to the foamate stream of foam fractionation. (wikipedia.org)
  • 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)
  • Physical and chemical properties were assessed, including aggregate stability, humic organic fractions, and a microbiological evaluation through determination of basal respiration, microbial biomass carbon, and metabolic quotient. (scielo.br)
  • 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)
  • 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 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)
  • Fractionation of PDAG fat changes the chemical composition of liquid and solid fractions. (peerj.com)
  • A novel fractionation method, based on both particle size and settling characteristics, was employed to examine metal distributions among five fractions. (biomedsearch.com)
  • In this study, four sediment extracts from the Upper Danube River in Germany were used with a novel fractionation technique to characterize the sediment extracts and fractions for their ability to disrupt steroidogenesis, for their mutagenic activities and their teratogenic effects. (usask.ca)
  • 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)
  • Initially, complex mixtures may be separated and bioassayed in carefully defined chemical fractions. (indigo.ca)
  • Sequential extraction procedures were used to assess selective chemical fractions of Pb in the soil. (mdpi.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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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 fulvic acid by iron and aluminum oxides--influence on copper toxicity to Ceriodaphnia dubia. (ucdenver.edu)
  • 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)
  • 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)
  • Airborne concentrations and chemical considerations of radioactive ruthenium from an undeclared major nuclear release in 2017. (nih.gov)
  • 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 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)
  • 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)
  • 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)
  • This session will explore the integration of thermo-chemical and biochemical processes for the conversion of renewable feedstocks into biofuels and/or bulk chemicals. (aiche.org)
  • As in many chemical processes, there are competing considerations of recovery (i.e. the percentage of target surfactant that reports to the overhead foamate stream) and enrichment (i.e. the ratio of surfactant concentration in the foamate to the concentration in the feed). (wikipedia.org)
  • 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)
  • 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)
  • 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)
  • However it has much broader application in the chemical process industry and can be used for the removal of surface active contaminants from waste water streams in addition to the enrichment of bio-products. (wikipedia.org)
  • Erdemir US, Gucer S (2016a) Characterization of copper bioavailability in wheat flour by chemical fractionation and inductively coupled plasma-mass spectrometry. (springer.com)
  • Lemos, PADC , Mendes, BS & Gonçalves, MMBP 2010, Fractionation and Chemical Characterization of Biooil from the Pyrolysis of Chicken Beds . (unl.pt)
  • 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 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)
  • The selection is a valuable source of information for readers interested in polymer fractionation. (google.com.au)
  • 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)
  • 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)
  • Electrochemical oxidation of urea provides an approach to prevent excess urea emissions into the environment while generating value by capturing chemical energy from waste. (uwaterloo.ca)
  • 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)
  • 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)
  • 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)
  • and chemical fractionation, which estimates soluble fraction, exchangeable fraction, fraction associated with clay minerals, fraction associated with organic matter and residual fraction. (scielo.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)
  • 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)
  • 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)
  • This is particularly apparent with viable cell fractionation, where cells retain their native deformability. (elsevier.com)
  • 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)
  • 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 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)
  • his exposure to hazardous chemicals is more commonly a multifactorial phenomenon. (indigo.ca)
  • 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)
  • During the past decade tremendous strides have been made in the chemical sciences as advances in microelectronics, lasers, materials science, etc. have all converged to produce instrumentation of unparalleled speed, sensitivity, and flexibility. (caltech.edu)
  • The soils under study showed physical and chemical properties typical of a Haplustox, such as low nutrient content, low cation exchange capacity, and high levels of acidity and Al saturation. (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)
  • 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)
  • 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)
  • APS JOURNALS ONLINE - American Physical Society Multimedia Chemical Physics Journals (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)