Alicyclic hydrocarbons in which three or more of the carbon atoms in each molecule are united in a ring structure and each of the ring carbon atoms is joined to two hydrogen atoms or alkyl groups. The simplest members are cyclopropane (C3H6), cyclobutane (C4H8), cyclohexane (C6H12), and derivatives of these such as methylcyclohexane (C6H11CH3). (From Sax, et al., Hawley's Condensed Chemical Dictionary, 11th ed)
Organic compounds composed exclusively of carbon and hydrogen. Three or more carbon atoms are arranged in a cyclic structure and they possess aliphatic properties.
Six-carbon alicyclic hydrocarbons.
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
Exclusive legal rights or privileges applied to inventions, plants, etc.
A plastic substance deposited by insects or obtained from plants. Waxes are esters of various fatty acids with higher, usually monohydric alcohols. The wax of pharmacy is principally yellow wax (beeswax), the material of which honeycomb is made. It consists chiefly of cerotic acid and myricin and is used in making ointments, cerates, etc. (Dorland, 27th ed)
Substances that cause the adherence of two surfaces. They include glues (properly collagen-derived adhesives), mucilages, sticky pastes, gums, resins, or latex.
Acrylic acids or acrylates which are substituted in the C-2 position with a methyl group.
Apparatus, devices, or supplies intended for one-time or temporary use.
Substances used to cause adherence of tissue to tissue or tissue to non-tissue surfaces, as for prostheses.
Naturally occurring complex liquid hydrocarbons which, after distillation, yield combustible fuels, petrochemicals, and lubricants.
A refined petroleum fraction used as a fuel as well as a solvent.
Volative flammable fuel (liquid hydrocarbons) derived from crude petroleum by processes such as distillation reforming, polymerization, etc.
A drug-metabolizing, cytochrome P-450 enzyme which catalyzes the hydroxylation of aniline to hydroxyaniline in the presence of reduced flavoprotein and molecular oxygen. EC 1.14.14.-.
Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed)
A group of compounds derived from ammonia by substituting organic radicals for the hydrogens. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A generic term for all substances having the properties of stretching under tension, high tensile strength, retracting rapidly, and recovering their original dimensions fully. They are generally POLYMERS.
Cyclic esters of hydroxy carboxylic acids, containing a 1-oxacycloalkan-2-one structure. Large cyclic lactones of over a dozen atoms are MACROLIDES.
The generic name for the group of aliphatic hydrocarbons Cn-H2n+2. They are denoted by the suffix -ane. (Grant & Hackh's Chemical Dictionary, 5th ed)
A plant genus in the LAURACEAE family. The bark of the trees is used in FOLK MEDICINE and FLAVORING AGENTS.
Any combustible hydrocarbon deposit formed from the remains of prehistoric organisms. Examples are petroleum, coal, and natural gas.
A basis of value established for the measure of quantity, weight, extent or quality, e.g. weight standards, standard solutions, methods, techniques, and procedures used in diagnosis and therapy.
Complex petroleum hydrocarbons consisting mainly of residues from crude oil distillation. These liquid products include heating oils, stove oils, and furnace oils and are burned to generate energy.
An amorphous form of carbon prepared from the incomplete combustion of animal or vegetable matter, e.g., wood. The activated form of charcoal is used in the treatment of poisoning. (Grant & Hackh's Chemical Dictionary, 5th ed)
A natural fuel formed by partial decomposition of vegetable matter under certain environmental conditions.
A product of hard secondary xylem composed of CELLULOSE, hemicellulose, and LIGNANS, that is under the bark of trees and shrubs. It is used in construction and as a source of CHARCOAL and many other products.
All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.
Auditory and visual instructional materials.
A method of differentiating individuals based on the analysis of qualitative or quantitative biological traits or patterns. This process which has applications in forensics and identity theft prevention includes DNA profiles or DNA fingerprints, hand fingerprints, automated facial recognition, iris scan, hand geometry, retinal scan, vascular patterns, automated voice pattern recognition, and ultrasound of fingers.
Machine readable patient or equipment identification device using radio frequency from 125 kHz to 5.8 Ghz.
Illegitimate use of substances for a desired effect in competitive sports. It includes humans and animals.
A potent mycotoxin produced in feedstuffs by several species of the genus FUSARIUM. It elicits a severe inflammatory reaction in animals and has teratogenic effects.
A subclass of dual specificity phosphatases that play a role in the progression of the CELL CYCLE. They dephosphorylate and activate CYCLIN-DEPENDENT KINASES.
A member of the Rho family of MONOMERIC GTP-BINDING PROTEINS. It is associated with a diverse array of cellular functions including cytoskeletal changes, filopodia formation and transport through the GOLGI APPARATUS. This enzyme was formerly listed as EC 3.6.1.47.
Phosphoprotein with protein kinase activity that functions in the G2/M phase transition of the CELL CYCLE. It is the catalytic subunit of the MATURATION-PROMOTING FACTOR and complexes with both CYCLIN A and CYCLIN B in mammalian cells. The maximal activity of cyclin-dependent kinase 1 is achieved when it is fully dephosphorylated.
A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.
Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.
The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.
DNA sequences encoding RIBOSOMAL RNA and the segments of DNA separating the individual ribosomal RNA genes, referred to as RIBOSOMAL SPACER DNA.
A plant genus of the family CISTACEAE. The common name of rock rose is also sometimes used with the closely related Helianthemum genus (CISTACEAE).
A strong oxidizing agent used in aqueous solution as a ripening agent, bleach, and topical anti-infective. It is relatively unstable and solutions deteriorate over time unless stabilized by the addition of acetanilide or similar organic materials.
The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.
A group of compounds that contain a bivalent O-O group, i.e., the oxygen atoms are univalent. They can either be inorganic or organic in nature. Such compounds release atomic (nascent) oxygen readily. Thus they are strong oxidizing agents and fire hazards when in contact with combustible materials, especially under high-temperature conditions. The chief industrial uses of peroxides are as oxidizing agents, bleaching agents, and initiators of polymerization. (From Hawley's Condensed Chemical Dictionary, 11th ed)
The industry concerned with the removal of raw materials from the Earth's crust and with their conversion into refined products.

Attenuation of mu-opioid tolerance and cross-tolerance by the competitive N-methyl-D-aspartate receptor antagonist LY235959 is related to tolerance and cross-tolerance magnitude. (1/99)

Although NMDA receptor antagonists attenuate the development of morphine tolerance, it is not clear whether NMDA receptor antagonists also prevent tolerance and cross-tolerance to other mu-opioid agonists and, if so, whether prevention is related to the efficacy of the agonist used to examine tolerance. A rat tail-withdrawal procedure was used to test the antinociceptive effects of the mu-opioids etorphine, morphine, and dezocine before and after twice-daily subcutaneous injections with either 0. 003 mg/kg etorphine, 10 mg/kg morphine, or 3.0 mg/kg dezocine, each administered alone or in combination with 3.0 mg/kg of the competitive NMDA antagonist LY235959. After chronic etorphine, the etorphine, morphine, and dezocine curves were shifted rightward 1.0-, 2.2-, and 3.4-fold, respectively. LY235959 prevented cross-tolerance to morphine and dezocine. After chronic morphine, the etorphine and morphine curves were shifted rightward 2.5- and 2. 9-fold, respectively, and the dezocine curve was flattened. LY235959 prevented morphine tolerance and cross-tolerance to etorphine and reduced the magnitude of cross-tolerance to dezocine. After chronic dezocine, the etorphine, morphine, and dezocine curves were shifted rightward 4.1-, 3.5-, and 9.6-fold, respectively. LY235959 did not prevent but reduced the magnitude of tolerance and cross-tolerance. In a separate experiment, the following rank order of efficacy was determined from the magnitudes of rightward shift in each dose-effect curve after administration of 1.0 mg/kg of the irreversible antagonist clocinnamox: etorphine > morphine > dezocine. These data show that differences in tolerance magnitude are related to opioid efficacy and that attenuation of mu-opioid tolerance and cross-tolerance by LY235959 depends upon the magnitude of opioid tolerance.  (+info)

Biodegradation of n-alkylcycloalkanes and n-alkylbenzenes via new pathways in Alcanivorax sp. strain MBIC 4326. (2/99)

The degradation of long-chain n-alkylbenzenes and n-alkylcyclohexanes by Alcanivorax sp. strain MBIC 4326 was investigated. The alkyl side chain of these compounds was mainly processed by beta-oxidation. In the degradation of n-alkylcyclohexanes, cyclohexanecarboxylic acid was formed as an intermediate. This compound was further transformed to benzoic acid via 1-cyclohexene-1-carboxylic acid.  (+info)

Particulate matter and manganese exposures in Indianapolis, Indiana. (3/99)

The distribution of PM(2.5) and manganese (Mn) personal exposures was determined over a 4-month period in Indianapolis, IN, at a time when the gasoline additive, methylcyclopentadienyl manganese tricarbonyl (MMT), was not being used. The data collection period coincided with the data collection period in the Toronto, ON, study, where MMT had been used as a gasoline additive for over 20 years. The inferential or target population consisted of noninstitutionalized residents of the Indianapolis area during the monitoring period (from May 1996 through August 1996) who were at least 16 years old. The survey instruments used in this study (and also in Toronto) included a household screener form (HSF), a study questionnaire (SQ), and a time and activity questionnaire (TAQ). The SQ was administered to elicit information about the participant and his/her activities, occupation, and surroundings that might be relevant to his/her exposure to particles and Mn. In addition to the personal particulate matter (PM) and elemental 3-day monitoring, 240 participants completed a TAQ on a daily basis during the actual monitoring period. Also, a subset of participants had 3-day outdoor and indoor stationary monitoring at their home (approximately 58 observations), and sampling was conducted at a fixed site (approximately thirty-three 3-day observations). The quality of data was assessed and compared to the Toronto study in terms of linearity of measurement, instrument and method sensitivity, measurement biases, and measurement reproducibility. Twenty-six of the sample filters were subjected to two analyses to characterize the within-laboratory component of precision in terms of relative standard deviations (RSDs). The median RSD for Mn was 8.7%, as compared to 2.2% for Toronto. The quality assurance (QA) laboratory exhibited a clear positive bias relative to the primary laboratory for Al and Ca, but no systematic difference was evident for Mn. A high interlaboratory correlation (>0.99) was also attained for Mn. Mean field blank results for PM and Mn were 0.87 microg/m(3) and 0.71 ng/m(3), respectively, which were comparable to the Toronto study. The median RSDs for colocated fixed site and residential samples ranged from 2.2% to 9.0% for PM and from 8.8% to 15.3% for Mn, which were close to those observed in Toronto. For the PM(10), the 90th percentile indoors was 124 microg/m(3) compared with 54 microg/m(3) outdoors. This pattern was even more pronounced for the PM(2.5) data (90th percentiles of 92 microg/m(3) indoors vs 30 microg/m(3) outdoors). Personal PM(2.5) was somewhat higher than the indoor levels, but the percentiles seemed to follow the more highly skewed pattern of the indoor distribution. This difference was largely due to the presence of some smokers in the sample; e.g., exclusion of smokers led to a personal exposure distribution that was more similar to the outdoor distribution. The estimated 90th percentile for the nonsmokers' personal exposures to PM was 43 microg/m(3) compared with 84 microg/m(3) for the overall population. In general, the Indianapolis PM levels of a given type and cut size were somewhat higher than the levels observed in Toronto, e.g., the median and 90th percentile for the personal PM(2.5) exposures were 23 and 85 microg/m(3), respectively, in Indianapolis, while in Toronto, the corresponding percentiles were 19 and 63 microg/m(3). The cities' distributions of the proportion of the PM(10) mass in the 2.5-microm fraction appeared similar for the residential outdoor data (medians of 0.67 and 0.65 for Indianapolis and Toronto, respectively, and 90th percentiles of 0.83 for both cities). For the indoor data, Indianapolis tended to have a larger portion of the mass in the fine fraction (median of 0.80 compared to 0.70 for Toronto). Unlike the PM, the Indianapolis indoor Mn concentration levels were substantially lower than the outdoor levels for both PM sizes, and the median personal levels for Mn in PM(2.5) appeared to fall between the median indoor and outdoor levels. The personal Mn exposure distributions exhibited more skewness than the indoor or outdoor distributions (e.g., the means for the personal, indoor, and outdoor distributions were 7.5, 2.6, and 3.5 ng/m(3), respectively, while the medians were 2.8, 2.2, and 3.2 ng/m(3), respectively). At least a substantial portion of the high end of the personal exposure distribution appeared to be associated with occupational exposures to Mn. In general, the Mn levels in both cut sizes in Indianapolis were approximately 5 ng/m(3) smaller than those in Toronto (e.g., the estimated median and mean levels for personal Mn exposures in PM(2.5) were 2.8 and 7.5 ng/m(3), respectively, in Indianapolis, but were 8.0 and 13.1 ng/m(3) in Toronto). For the nonoccupational subgroups with no exposure to smoking and no subway riders in the two cities, the medians (2.6 ng/m(3) in Indianapolis and 7.8 ng/m(3) in Toronto) were similar to those for the overall populations, but the means were substantially smaller (3.1 ng/m(3) in Indianapolis and 9.2 ng/m(3) in Toronto). The median proportion of Mn in the fine fraction (relative to the PM(10) Mn) for Indianapolis was 0.39 for outdoors and 0.55 for indoors; these ratios were somewhat smaller than the corresponding Toronto medians (0.52 and 0.73). The study found high correlations for particulates and Mn between personal exposures and indoor concentrations, and between outdoor and fixed site concentrations, and low correlations of personal and indoor levels with outdoor and fixed site levels. The pattern was similar to that observed for Toronto, but slightly more pronounced. The PM(10) Mn concentrations (log scale) generally exhibited stronger associations among these various measures than the PM(2.5) Mn concentrations. Comparisons of the particulate distributions between PTEAM (Riverside, CA) and the Indianapolis and Toronto studies were also made.  (+info)

Synthesis of (R)- and (S)- muscone. (4/99)

(R)-(-)-Muscone (3-methylcyclopentadecanone, 1) the key perfumery component isolated from the male musk deer, Moschus moschiferus,* was synthesized from the easily available chiral building block, (R)-3-tert-butoxycarbonyl-2-methylpropanoic acid (2), by employing ring-closing olefin metathesis (RCM). Antipode (+)-1 was also synthesized in a similar manner from tert-butyl (S)-3-methoxycarbonylbutanoate (10). *(a) Walbaum, H. J. J. Prakt. Chem., 73, 488 (1906); (b) Ruzicka, L., Further considerations on the constitution of muscone. Helv. Chim. Acta, 9, 715, 1008-1017 (1926).  (+info)

Capsaicin-induced hyperalgesia and mu-opioid-induced antihyperalgesia in male and female Fischer 344 rats. (5/99)

The influence of sex in determining responses to opioid analgesics has been well established in rodents and monkeys in assays of short-lasting, phasic pain. The purpose of this investigation was to use a capsaicin model of tonic pain to evaluate sex differences in hyperalgesia and mu-opioid-induced antihyperalgesia in Fischer 344 (F344) rats. Capsaicin injected into the tail produced a dose-dependent thermal hyperalgesia in males and females, with the dose required to produce a comparable level of hyperalgesia being 3.0-fold higher in males than in females. These sex differences were modulated by gonadal hormones, inasmuch as gonadectomy increased the potency of capsaicin in males and decreased its potency in females. Morphine, buprenorphine, and dezocine administered by various routes [systemic (s.c.), local (in the tail), and central (i.c.v.)] generally produced marked antihyperalgesic effects in males and females. Although in most instances these opioids were equally potent and effective in males and females, selected doses of local and i.c.v. administered buprenorphine produced greater effects in females. When administered locally, the antihyperalgesic effects of morphine were mediated by peripheral opioid receptors in both males and females, since this effect was not reversed by i.c.v. naloxone methiodide. These data contrast with the finding that mu-opioids are more potent in male rodents in assays of phasic pain, thus suggesting that distinct mechanisms underlie male and female sensitivity to opioid antinociception in phasic and tonic pain models. These findings emphasize the need to test male and female rodents in tonic pain assays that may have greater relevance for human pain conditions.  (+info)

Kedarcidin, a new chromoprotein antitumor antibiotic. II. Isolation, purification and physico-chemical properties. (6/99)

Kedarcidin, a new chromoprotein antitumor antibiotic, was isolated from the culture broth of a novel actinomycete strain L585-6 (ATCC 53650). The antibiotic was recovered from the culture filtrate by adsorption to QAE ion exchanger and purified by successive application of gel filtration and ion exchange chromatography with Sephadex G-50 and DEAE-Sephadex, respectively. Kedarcidin is an acidic complex (pI 3.65) with an apparent molecular weight of 12,400. The complex consists of a highly unstable, solvent extractable chromophore and a water soluble peptide. The apoprotein is a single chain polypeptide of 114 residues.  (+info)

CONJUGATIONS WITH GLUTATHIONE. THE ENZYMIC CONJUGATION OF SOME CHLOROCYCLOHEXENES. (7/99)

1. alpha-3,4,5,6-Tetrachlorocyclohex-1-ene and gamma-2,3,4,5,6-pentachlorocyclohex-1-ene are conjugated with glutathione in vitro by a rat-liver enzyme that is probably glutathione S-aryltransferase. 2. Chlorocyclohexane and the alpha-, beta-, gamma- and delta-isomers of hexachlorocyclohexane were not substrates for rat-liver glutathione S-aryltransferase. 3. Glutathione-S-aryltransferase activity was present in tissue preparations of houseflies of insecticide-resistant and -susceptible strains. More activity was found in a dieldrin-resistant strain of houseflies fed on dieldrin than in either a dieldrin-resistant strain not fed on dieldrin or a control strain of dieldrin-susceptible houseflies. 4. Housefly soluble supernatant preparations converted S-(2-chloro-4-nitrophenyl)glutathione into the corresponding cysteine and mercapturic acid derivatives.  (+info)

THE METABOLISM OF METHYLCYCLOHEXANE. (8/99)

1. When [U-(14)C]methylcyclohexane is fed to rabbits (dose 2-2.5m-moles/kg. body wt.), 65% of the radioactivity is excreted in the urine as metabolites, 0.5% appears in the faeces and about 15% in the expired air, some 4-5% remaining in the body in about 60hr. after dosing. The 15% of the dose appearing in the expired air consists of unchanged methylcyclohexane (10%) and (14)CO(2) (5%). The low output of (14)CO(2) shows that reactions leading to complete oxidation of methylcyclohexane are of minor importance. 2. The main metabolite found in the urine was the glucuronide of trans-4-methylcyclohexanol which was isolated. Seven methylcyclohexanols were found in the urine as conjugated glucuronides. The amounts of these were determined by isotope dilution to be as follows: cis-2-, 0.6%; trans-2-, 1.2%; cis-3-, 11.5%; trans-3-, 10.5%; cis-4-, 2.4%; trans-4-methylcyclohexanol, 14.7%, cyclohexylmethanol, 0.3%. No 1-methylcyclohexanol was found. There was evidence also that a small amount (approx. 1%) of the hydrocarbon aromatized to benzoic acid, probably via cyclohexylmethanol and cyclohexane-carboxylic acid. 3. The pattern of hydroxylation and the various amounts of the isomers found suggest that the hydroxylation in vivo of methylcyclohexane is dependent on steric factors in the molecule, hydroxylation occurring to the greatest extent at the carbon atom furthest away from the methyl group.  (+info)

Acid-catalyzed positive photoresist compositions which are imageable with 193 nm radiation and are developable to form photoresist structures of high resolution and high etch resistance are enabled by the use of a combination of cyclic olefin polymer, photosensitive acid generator and a hydrophobic non-steroidal multi-alicyclic component containing plural acid labile linking groups. The cyclic olefin polymers preferably contain i) cyclic olefin units having polar functional moieties, ii) cyclic olefin units having acid labile moieties that inhibit solubility in aqueous alkaline solutions.
The combination of microfluidics and X-ray methods attracts a lot of attention from researchers as it brings together the high controllability of microfluidic sample environments and the small length scales probed by X-rays. In particular, the fields of biophysics and biology have benefited enormously from such app
The flagship monthly journal of SPIE, |i|Optical Engineering|/i| (OE) publishes peer-reviewed papers reporting on research and development in all areas of optics, photonics, and imaging science and engineering.
2-Methoxyphenylacetic acid, 99%, ACROS Organics™ 100g; Glass bottle 2-Methoxyphenylacetic acid, 99%, ACROS Organics™ Carbonyl Compounds
The cure kinetics of polydicyclopentadiene (pDCPD) prepared by ring-opening metathesis polymerization with three different concentrations of Grubbs catalyst was examined using differential scanning calirimetry (DSC). The experimental data were used to test several different phenomenological kinetic models. The data are best modeled with a model-free isoconversional method. This analysis reveals that the activation energy increases significantly for degree of cure greater than 60%. Catalyst concentration is shown to have a large effect on the cure kinetics ...
0033] As used herein to describe the insertion mechanisms, drug delivery pumps, or any of the relative positions of the components of the present invention, the terms axial or axially refer generally to a longitudinal axis A around which the insertion mechanisms are preferably positioned, although not necessarily symmetrically there-around. The term radial refers generally to a direction normal to axis A. The terms proximal, rear, rearward, back, or backward refer generally to an axial direction in the direction P. The terms distal, front, frontward, depressed, or forward refer generally to an axial direction in the direction D. As used herein, the teem glass should be understood to include other similarly non-reactive materials suitable for use in a pharmaceutical grade application that would normally require glass, including but not limited to certain non-reactive polymers such as cyclic olefin copolymers (COC) and cyclic olefin polymers (COP). The term ...
Figure 3 also shows other monomers and polymers that can or cannot be used to make hard-and-clear (HC) plastics. For example, HC PC plastics (n , 10) all released chemicals having EA (e.g., PC baby bottle B1 and PC water bottle W1 in Figure 2), almost certainly phenolics such as BPA (Figure 1B). The dimethyl terephthalate monomer used to make PET and PETG plastics exhibited anti-EA (n = 3 assays; data not shown; for anti-EA assay protocol, see Supplemental Material (doi:10.1289/ehp.1003220)]. Furthermore, breakdown products of dimethyl terephthalate, PET, and PETG resins probably contain and release phenolic moieties that have EA that account for some of the data for PET products in Tables 1 and 2. Polyethersulfone HC products also consistently released chemicals having EA or anti-EA, especially when stressed with UV light (data not shown), possibly from unreacted phenolic monomer residues or phenolic stress-degradation products. In contrast, some HC cyclic olefin polymer/cyclic olefin copolymer ...
METHYLCYCLOHEXANE (ALICYCLISCHE KOHLENWASSERSTOFFE); DEHYDRIERUNG (CHEMISCHE REAKTIONEN); CHEMISCHE KINETIK; WASSERSTOFF (BRENNSTOFFTECHNOLOGIE); MODELLE UND MODELLUNTERSUCHUNG (TECHNISCHE CHEMIE UND VERFAHRENSTECHNIK); METHYL CYCLOHEXANES (ALICYCLIC HYDROCARBONS); DEHYDROGENATION (CHEMICAL REACTIONS); CHEMICAL KINETICS; HYDROGEN (FUEL TECHNOLOGY); MODELS AND MODEL ANALYSIS (CHEMICAL TECHNOLOGY AND PROCESS ENGINEERING ...
View Notes - 351 E2p mc from CHEM 351 at BYU. 351 E2 Practice 1. How many stereoisomers are there of 1-isopropyl-4-methylcyclohexane? A. only 1 structure possible - no stereoisomers B. two C. three
An olefin copolymer having a functional group and having a structural unit (a) derived from ethylene, a structural unit (b) derived from an α-olefin having 3 to 12 carbon atoms, and a structural unit (c) derived from a cycloolefin, exhibits an intrinsic viscosity [η] of 0.1 to 10 dl/g as measured in decalin at 135 C. and can be used in a rubber composition.
ORGANIC POLLUTANTS DEGRADATION USING PULSELESS CORONA DISCHARGE: APPLICATION IN ULTRAPURE WATER PRODUCTION - Ultrapure water;Corona discharge;Ozonation;Radical species;
A disposable microsensor is designed, fabricated and tested for standard BOD (Biochemical Oxygen Demand) measurements. A transparent Cyclic Olefin Copolymer (COC) substrate is used for sensor fabrication. Standard lithographic procedures in addition to techniques like screen printing and electroplating are used to fabricate the sensor. A microbial strain of Trichosporon Cutaneum is immobilized over one pair of sensor electrodes while the other is used as a reference. Depending on the respiratory activities of the microbial strain in different samples, the BOD values of the samples can be measured in terms of difference between the output signals. The sensor layer is attached to an injection-molded passive microfluidic channel on the top. Advantages of the BOD microsensor include, but are not limited to, fast BOD measurement, disposability because of its low cost, chemically inert polymer substrate, flow-through sample injection scheme and integration of on-chip optics.
Corning Incorporated (NYSE: GLW) today announced its new Corning® 96- and 384-Well Spheroid Microplates and the Corning® High-Content Imaging Cyclic Olefin Copolymer (COC) Microplates. Corning Life Sciences will showcase its latest innovations in booth #1029 at the Society for Laboratory Automation & Screening (SLAS) 2014 Conference, Jan. 18-22, in San Diego, Calif.
Corning Incorporated (NYSE: GLW) today announced its new Corning® 96- and 384-Well Spheroid Microplates and the Corning® High-Content Imaging Cyclic Olefin Copolymer (COC) Microplates. Corning Life Sciences will showcase its latest innovations in booth #1029 at the Society for Laboratory Automation & Screening (SLAS) 2014 Conference, Jan. 18-22, in San Diego, Calif.
Linear hybrid block copolymers with well controlled molecular weights and narrow polydispersities were synthesized viaring-opening metathesis polymerization (ROMP) followed by ring-opening polymerization of amino acidN-carboxyanhydrides.
Alexandre Vasseur, Caroline Laugel, Dominique Harakat, Jacques Muzart, Jean Le Bras. Ligand-Promoted Reactivity of Alkenes in Dehydrogenative Heck Reactions of Furans and Thiophenes. European Journal of Organic Chemistry, Wiley-VCH Verlag, 2015, 2015 (5), pp.944-948. ⟨10.1002/ejoc.201403475⟩. ⟨hal-02109118⟩ ...
Kataria, Meenal ; Deol, Harnimarta ; Singh, Gurpreet ; Kumar, Manoj ; Bhalla, Vandana (2018) Visible-light-mediated dehydrogenative cross-coupling between terminal alkynes and aldehydes by employing a supramolecular polymeric ensemble of PBI derivative New Journal of Chemistry, 42 (2). pp. 822-826. ISSN 1144-0546 Full text not available from this repository.. Official URL: http://pubs.rsc.org/en/content/articlelanding/2018.... Related URL: http://dx.doi.org/10.1039/C7NJ03557H ...
Communications DOI: 10.1002/anie.201006208 C H Functionalization Palladium-Catalyzed Dehydrogenative Cross-Couplings of Benzazoles with Azoles** Wei Han, Peter Mayer, and Armin R. Ofial* Biaryl compounds play an important role in nature and many functional materials.[1] Classical transition-metal-catalyzed methods for the synthesis of biaryls, such as Kumada, Negishi, Stille, Suzuki, and Hiyama-Denmark reactions, require functionalized arenes for the selective linkage of two arenes through a C C bond.[2] Recently, catalytic direct arylations have emerged which avoid the introduction of functional groups in at least one of the two coupling partners prior to cross-coupling by C H bond activation.[3] The development of direct selective intermolecular heteroarylations of heteroarenes appears particularly beneficial because prefunctionalizations of heteroarenes are often difficult. From the viewpoint of atom economy, twofold C H bond activation is the ideal strategy for interconnecting two ...
TY - JOUR. T1 - Efficient and phosphine-free bidentate N-heterocyclic carbene/ruthenium catalytic systems for the dehydrogenative amidation of alcohols and amines. AU - Wu, Xuan Jun. AU - Wang, Hua Jing. AU - Yang, Zhao Qi. AU - Tang, Xiao Sheng. AU - Yuan, Ye. AU - Su, Wei. AU - Chen, Cheng. AU - Verpoort, Francis. PY - 2019/3/7. Y1 - 2019/3/7. N2 - The direct amide synthesis from alcohols and amines applying various transition metal catalysts has been demonstrated as an attractive and promising process. Among various catalytic systems, N-heterocyclic carbene (NHC)-based ruthenium (Ru) ones have been testified to be active for this atom-economic transformation. Although a variety of imidazole-based NHC/Ru catalytic systems were reported to be active for this reaction, the benzimidazole-based analogs exhibited higher catalytic performance in most cases. However, these catalytic systems, which comprise a monodentate NHC ligand and a Cl or phosphine ligand as the key components, require relatively ...
Stereogenic-at-Mo monoalkoxide and monoaryloxide complexes promote enyne ring-closing metathesis (RCM) reactions, affording the corresponding endo products with high selectivity (typically ,98:,2 endo:exo). All catalysts can be prepared and used in situ. Five-, six-, and seven-membered rings are obtained through reactions with enyne substrates that bear all-carbon tethers as well as those that contain heteroatom substituents. The newly developed catalytic protocols complement the related exo-selective Ru-catalyzed processes. In cases where Ru-based complexes deliver exo and endo products nondiscriminately, such as when tetrasubstituted cyclic alkenes are generated, Mo-catalyzed reactions afford the endo product exclusively. The efficiency of synthesis of N- and O-containing endo diene heterocycles can be improved significantly through structural modification of Mo catalysts. The modularity of Mo-based monopyrrolides is thus exploited in the identification of the most effective catalyst variants. ...
4. A photoreactive polymer comprising a repeating unit represented by the following formula 2a or 2b: ##STR00041## wherein in the formulas 2a and 2b, independently, m is 50 to 5,000; q is an integer from 0 to 4; and at least one of R1, R2, R3 and R4 is a radical represented by the following formula 1a, among the R1 to R4, the remainders other than the radical of the formula 1a are the same as or different from one another and independently selected from the group consisting of hydrogen; halogen; substituted or unsubstituted linear or branched alkyl having 1 to 20 carbon atoms; substituted or unsubstituted linear or branched alkenyl having 2 to 20 carbon atoms; substituted or unsubstituted linear or branched alkynyl having 2 to 20 carbon atoms; substituted or unsubstituted cycloalkyl having 3 to 12 carbon atoms; substituted or unsubstituted aryl having 6 to 40 carbon atoms; substituted or unsubstituted arylalkyl having 5 to 12 carbon atoms; and a polar functional group comprising at least one of ...
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On a étudié, à 390°C et sous la pression atmosphérique, la cinétique de la déshydrogénation du méthylcyclohexane en toluène sur un catalyseur de platique sur zéolite NaY. On a traité, un utilisant la théorie Time on Stream, les résultats cumulatifs de la transformation obtenus à une vitesse spatiale constante et pour divers temps dutilisation; on a ainsi déterminé les constantes de vitesse de la déshydrogénation et de la perte dactivité du catalyseur.. On a constaté que la réaction sest produite en passant par un certain nombre de déshydrogénations partielles et consécutives et que la première déshydrogénation se comportait comme létape limitant la vitesse. On a discuté linfluence quexercent les produits partiellement déshydrogénés et le toluène sur la désactivation du catalyseur. ...
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Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
Recently, we have identified two strategies for selective transition state (TS) stabilization in catalyst-free azide/alkyne cycloadditions. In particular, the transition states for the formation of both 1,4- and 1,5-isomers can be stabilized via hype
Melt adhesive containing 5 to 40 wt.-% of at least one ethylene-based copolymer and at least one C3 to C20-α-olefin obtained through metallocene-catalyzed polymerization, 10 to 65 wt.-% of at least one tackifying resin, 0 to 35 wt.-% of a plasticizer, 0.01 to 30 wt.-% additives and additional ingredients selected from stabilizers, adhesion promoters, fillers or pigments, waxes and/or other polymers, wherein the total should amount to 100%, characterized in that copolymer A is a block copolymer that exhibits a substantially even elastic behavior in the range of 0 C. to 25 C., measured as the ratio of the storage modulus E′ according to (E′0C−E′25C)/E′25C|1.5.
In order to remove the diesel particulate matter (PM) and nitrogen oxides (NOx) from diesel exhaust, the gas is passed through a corona discharge collector for PM and another corona discharge device for NOx oxidation. With the PM collector, PM is accumulated on the central electrode, after that, it is removed by incineration technique. NOx concentration is decreased by oxidation to HNO3. In this study, these corona discharge reactors were coupled for removal of PM and NOx in progression, and attempted to remove these emissions in a slipstream of 14 liters/min of an experimental diesel engine and an actual vehicle, respectively. In case of the experimental test engine, it is found that nearly 100% and 15% of the PM and NOx emissions were removed even at a low input power of 26W (1560 J/L specific energy deposition). In the vehicle tests 1) a PM removal rate of 60% is obtained at an input power of over 40W, 2) a NOx removal rate of 97% is obtained at an input power of over 100W ...
gLiving Ring Opening Metathesis Polymerizations of Cyclic Olefins, h Novak, B. M., Grubbs, R. H. in Encyclopedia of Polymer Science and Engineering, 2nd Edition, Mark, H. F.; Bikales, N. M.; Overberger, C. G.; Menges, G.; Kroschwitz, J. I., Eds., John Wiley and Sons, Inc., New York, 1990, p. 420 ...
We disclose a novel, heterogeneous catalytic approach for selective coupling of C1 of N-aryltetrahydroisoquinolines with C3 of indoles in the presence of mesoporous manganese oxides. Our work involves a detailed mechanistic investigation of the reaction on the catalyst surface, backed by DFT computational studies, to understand the superior catalytic activity of manganese oxides.. ...
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Definition of dezocine in the Definitions.net dictionary. Meaning of dezocine. What does dezocine mean? Information and translations of dezocine in the most comprehensive dictionary definitions resource on the web.
The invention relates to a process for the preparation of a heterogeneous metallocene catalyst component from a suitably substituted metallocene of the sub-group 4 of the Periodic Table of the Elements and from poly(methylhydrogensiloxane) under the concomitant action of a catalyst. The metallocene component and a suitable aluminoxane can be used as catalyst for the polymerization of 1-olefins, cyclic olefins, diolefins and cyclic diolefins.
Propargyl alcohol is a useful synthon in synthetic organic chemistry. We found that the ruthenium(II) complex [Cp*RuCl(diene)] (Cp* = η5-C5Me5; diene = isoprene or 1,5-cyclooctadiene (cod)) catalyzes dimerization of 1,1-diphenylprop-2-yn-1-ol (1,1-diphenylpropargyl alcohol, 1a) at room temperature to afford an alkylidenebenzocyclobutenyl alcohol 2a quantitatively. Meanwhile, a stoichiometric reaction of the related hydrido complex [Cp*RuH(cod)] with 1a at 50 °C led to isolation of a ruthenocene derivative 4 bearing a cyclopentadienyl ring generated by dehydrogenative trimerization of 1a. Detailed structures of 2a and 4 were determined by X-ray crystallography. The reaction mechanisms for the formation of 2a and 4 were proposed.
Synthesis of Tetra(2-hydroxyethoxy)-Substituted Dibenzocyclooctyne Derivatives as Novel, Highly Hydrophilic Tool Compounds for Strain-Promoted Alkyne-Azide Cycloaddition ...
The influence of temperature and hydrocarbon additives on NOx removal and CO production has been studied by numerical modelling and process experiments for a synthetic gas mixture consisting of N2 ,O 2 ,H 2O and CO2 in a pulsed corona reactor. The NO reduction of more than 99% was achieved at the energy cost of ∼14 eV per NO molecule in the presence of 550 ppm C3H6 additive at T = 393 K. The simulated results agree well with the experimental data measured in the NO and NOx removal and C2H4 and C3H6 decomposition. Within a limited framework of non-uniform modelling approach, the temperature effect on the streamer nature discharge has been taken into account. Main reaction paths for the C2H4 and C3H6 decomposition and leading reactions of NOx conversion, CO, CH2O, CH3CHO productions are presented. Calculated concentrations of some by-products are given. The effect of the C3H6 + O reaction on the NOx oxidation and C3H6 decomposition using several channels and their rate constants taken from the
Para 50] In a particularly preferred embodiment, the inventive plasma ignition plug used in a four-cycle engine provides the following dynamics. The fuel is atomized to 0.4 micrometer diameter droplets mixed with air in a fuel injector/carburetor jet diameter of 0.056 centimeters. The air and fuel is injected into the cylinder and a ratio of 1 4: 7- 1 mixture. Plasma propagation occurs at an ignition point of twenty-two degrees before top dead center with the plasma field propagated at fifty nanosecond rise time, two hundred nanosecond duration, and fifty nanosecond shutoff duration at 1 3.5 volts DC at forty-one thousand, six hundred sixty amps. At these values, the plasma field disassociates long chain hydrocarbon molecules to individual ions, evenly distributed at atomic scale proximity under pressure. The following ignition arc occurs fifty nanoseconds after the collapse of the plasma field with an injection ignition impulse at seventy-five thousand volts DC at 7.5 amps for two hundred ...
Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (-CH2-) and one amine bridge (-NH-). It is a colorless liquid with an odor described as objectionable, and typical of amines. the name comes from the genus name Piper, which is the Latin word for pepper. Although piperidine is a common organic compound, it is best known as a representative structure element within many pharmaceuticals and alkaloids. Piperidine was first reported in 1850 by the Scottish chemist Thomas Anderson and again, independently, in 1852 by the French chemist Auguste Cahours, who named it. Both men obtained piperidine by reacting piperine with nitric acid. Industrially, piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum disulfide catalyst: C5H5N + 3 H2 → C5H10NH Pyridine can also be reduced to piperidine via a modified Birch reduction using sodium in ethanol. Piperidine itself has ...
Skin Corrosion In vitro, OECD 431, 2017 - The skin corrosivity potential of reaction mass of (4R)-4-(2-methoxypropan-2-yl)-1-methylcyclohexene and cis-1-methoxy-4-(2-methoxypropan-2-yl)-1-methylcyclohexane was assessed using an EpiDerm Reconstructed Human Epidermis (RHE) Model Kit in accordance with OECD guidance 431 and GLP. Duplicate tissues were treated with the test item for exposure periods of 30 and 60 mins. At the end of the exposure period the test item was rinsed from each tissue before being loaded with MTT. After MTT loading each tissue was placed in 2 mL isopropanol for MTT extraction. After extraction, each tissue was pierced and the extraction solution aliquoted for absorbance measurements. Absorbency at 562 nm of each well was measured using a Anthos 2001 microplate reader. Mean viability of tissues exposed to the test substance after 3 and 60 minutes were 107.6 and 72.9 %, respectively. The quality criteria required for acceptance of the resuts was met. Under the conditions of ...
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TY - JOUR. T1 - Influence of the Nature of Boron-Doped Diamond Anodes on the Dehydrogenative Phenol-Phenol Cross-Coupling. AU - Gleede, Barbara. AU - Yamamoto, Takashi. AU - Nakahara, Kenshin. AU - Botz, Alexander. AU - Graßl, Tobias. AU - Neuber, Rieke. AU - Matthée, Thorsten. AU - Einaga, Yasuaki. AU - Schuhmann, Wolfgang. AU - Waldvogel, Siegfried R.. PY - 2019/5/15. Y1 - 2019/5/15. N2 - Boron-doped diamond (BDD) represents a powerful and innovative electrode material. In particular, in combination with fluorinated solvents such as 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP), the system exhibits the largest known electrochemical window of approximately 5 V in protic media. Furthermore, the anodic treatment allows the direct formation of oxyl radicals, which are known to exhibit specific reactivity. The electrochemical dehydrogenative phenol-phenol cross-coupling is a versatile and useful transformation to non-symmetric biphenols. This electro-organic conversion can be divided into two regimes: ...
We have developed a fluorescence-based fiber-optical biosensor, which can selectively detect different antibodies in serial at preselected positions inside a single piece of fiber. The fiber is a microstructured polymer optical fiber fabricated from TOPAS cyclic olefin copolymer, which allows for UV activation of localized sensor layers inside the holes of the fiber. Serial fluorescence-based selective sensing of Cy3-labelled α-streptavidin and Cy5-labelled α-CRP antibodies is demonstrated.
Alicyclic hydrocarbons in which three or more of the carbon atoms in each molecule are united in a ring structure and each of the ring carbon atoms is joined to two hydrogen atoms or alkyl groups. The simplest members are cyclopropane (C3H6), cyclobutane (C4H8), cyclohexane (C6H12), and derivatives of these such as methylcyclohexane (C6H11CH3). (From Sax, et al., Hawleys Condensed Chemical Dictionary, 11th ed ...
Aldrich-698385; 1,2-Bis[(2S,5S)-2,5-diethylphospholano]benzene(1,5-cyclooctadiene)rhodium(I) tetrafluoroborate; CAS No.: 213343-64-7; Linear Formula: C30H48BF4P2Rh; Empirical Formula: C30H48BF4P2Rh; find related products, papers, technical documents, MSDS & more at Sigma-Aldrich.
Video explaining Naming Cycloalkanes for Organic Chemistry. This is one of many videos provided by Clutch Prep to prepare you to succeed in your college
We describe a new class of heterogeneous catalysts called supported molten metal catalysis (SMMC), in which molten metal catalysts are dispersed as nanodroplets on the surface of porous supports, allowing much larger active surface area than is possible in conventional contacting techniques for catalytic metals that are molten under reaction conditions, thus greatly enhancing their activity and potential utility. Specific examples of different types of reactions are provided to demonstrate the broad applicability of the technique in designing active, selective, and stable new catalysts. It is shown that dispersing the molten metal on a support in the suggested manner can enhance the rate of a reaction by three to four orders of magnitude as a result of the concomitant increase in the active surface area. New reaction examples include {gamma}-Al{sub 2}O{sub 3} supported molten Te (melting point 450 C) and Ga (MP 30 C) catalysts for bifunctional methylcyclohexane dehydrogenation. These catalysts provide
Corona discharges appear at atmospheric pressures in strongly non-uniform electric fields. Sharp edges of high voltage electrodes produce such fields in their vicinity. When the field in the rest space is negligible - this happens at large distances to the electric grounds - the corona discharge can be ignited. Otherwise, the high voltage electrodes may spark to the ground. Depending on the polarity of the high voltage electrode one distinguishes negative corona, formed around the cathode, and positive corona, formed around the anode. Negative corona is similar to the Townsend discharge, where the electrons, emitted by the cathode, accelerate in the electric field, ionize the gas in collisions with its atoms and molecules releasing more electrons, and thus creating an avalanche. Secondary processes include electron emission from the cathode and photoionization within the gas volume. Negative corona creates a uniform plasma glowing around the sharp edges of the electrodes. On the other hand, ...
Methylcyclohexane is a fully saturated strainless hydrocarbon and will not undergo a reaction with ozone, except at high concentrations (under such conditions it combusts). If you meant, 1-methylcyclohexene, the product is obtained by removing the double bond and attaching a double-bonded oxygen to each carbon atom. This gives 6-oxoheptanal. Then, after reducing you'll get 6-oxoheptanoic acid. This is your compound A. The last one specific carbonyl compound is 2-methylcyclohexanone ...
You may also wish to search for items by Izatt, R. and Izatt. 100 matching references were found. Oscarson, J.L.; Coxam, J.-Y.; Gillespie, S.E.; Izatt, R.M., Excess enthalpies of mixing methane with methanol, n-heptane, toluene and methylcyclohexane at 255.4 and 310.9 K and 13.8 MPa, Fluid Phase Equilib., 1996, 114, 161-74. [all data] Chen, X.; Oscarson, J.L.; Cao, H.; Gillespie, S.E.; Izatt, R.M., A new flow calorimeter designed for operation to 450.degree.C and 50 MPa, Thermochim. Acta, 1996, 285, 11-23. [all data] Wang, P.; Oscarson, J.L.; Izatt, R.M.; Watt, G.D.; Larsen, C.D., Thermodynamic parameters for the interaction of adenosine 5-diphosphate, and adenosine 5-triphosphate with Mg2+ from 323.15 to 398.15 K, J. Solution Chem., 1995, 24, 989-1012. [all data] Oscarson, J.L.; Wang, P.; Gillespie, S.E.; Izatt, R.M.; Watt, G.D.; Larsen, C.D.; Renuncio, J.A.R., Thermodynamics of protonation of AMP, ADP, and ATP from 50 to 125.degree.C, J. Solution Chem., 1995, 24, 171-86. [all data] Izatt, ...
TY - JOUR. T1 - Acoustically detectable cellular-level lung injury induced by fluid mechanical stresses in microfluidic airway systems. AU - Huh, Dongeun. AU - Fujioka, Hideki. AU - Tung, Yi Chung. AU - Futai, Nobuyuki. AU - Paine, Robert. AU - Grotberg, James B.. AU - Takayama, Shuichi. PY - 2007/11/27. Y1 - 2007/11/27. N2 - We describe a microfabricated airway system integrated with computerized air-liquid two-phase microfluidics that enables on-chip engineering of human airway epithelia and precise reproduction of physiologic or pathologic liquid plug flows found in the respiratory system. Using this device, we demonstrate cellular-level lung injury under flow conditions that cause symptoms characteristic of a wide range of pulmonary diseases. Specifically, propagation and rupture of liquid plugs that simulate surfactant-deficient reopening of closed airways lead to significant injury of small airway epithelial cells by generating deleterious fluid mechanical stresses. We also show that the ...
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TY - JOUR. T1 - Adducts of Phenoxathiin and Thianthrene Cation Radicals with Alkenes and Cycloalkenes. AU - Shine, Henry J.. AU - Zhao, Bingjun. AU - Qian, Ding Quan. AU - Marx, John N.. AU - Guzman-Jimenez, Ilse Y.. AU - Thurston, John H.. AU - Ould-Ely, T.. AU - Whitmire, Kenton H.. PY - 2003/11/14. Y1 - 2003/11/14. N2 - Phenoxathiin cation radical perchlorate (PO.+ClO 4-) added stereospecifically to cyclopentene, cyclohexene, cycloheptene, and 1,5-cyclooctadiene to give 1,2-bis(5-phenoxathiiniumyl)cycloalkane diperchlorates (4-7) in good yield. The diaxial configuration of the PO+ groups was confirmed with X-ray crystallography. Unlike additions of thianthrene cation radical perchlorate (Th.+ClO4-) to these cycloalkenes, no evidence for formation of monoadducts was found in the reactions of PO .+ClO4-. This difference is discussed. Addition of Th.+ClO4- to five trans alkenes (2-butene, 2-pentene, 4-methyl-2-pentene, 3-octene, 5-decene) and four cis alkenes (2-pentene, 2-hexene, 2-heptene, ...
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Blends of stereoregular propylene- Alpha -olefin copolymers and polypropylene of similar stereoregularity characterized by melting and crystallization behavior characteristic of the stereoregular propylene sequences as well as improved injection molding characteristics.
This paper starts by explaining how the vapour phase hydrogen peroxide rapid sporicidal process works and continues with a description of the present methods of cycle development. The paper continues with some suggestions as to how cycle development can be speeded up considerably and introduces enzyme indicators (EIs) as a recent development to add to chemical indicators (CIs) and possibly replace biological indicators (BIs). The paper offers practical solutions to both the problems mentioned above, based on long experience with the design, construction and validation of vapour phase hydrogen peroxide generators ...
Figure 31 indeed shows that fermionic atoms can pair and become molecular bosons, which can then condense into a molecular BEC. This is evident from the striking similarity of the interference patterns shown in Figures 26 and 31. Two overlapping degenerate Fermi gases would not create such macroscopic interference patterns because those wavefunctions have no intrinsic phase relationships, in contrast to the BEC wavefunctions. Molecular BECs, especially if the molecules are polar and can communicate with one anther through long-range forces, are of special interest as being quantum information storage devices, as individual molecules can potentially be addressed via their many internal degrees of freedom.. ...
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Boydston, Andrew J. and Holcombe, Thomas W. and Unruh, David A. et al. (2009) A direct route to cyclic organic nanostructures via ring-expansion metathesis polymerization of a dendronized macromonomer. Journal of the American Chemical Society, 131 (15). pp. 5388-5389. ISSN 0002-7863. PMCID PMC2765492. https://resolver.caltech.edu/CaltechAUTHORS:20090810-102905437 Xia, Yan and Boydston, Andrew J. and Yao, Yefeng et al. (2009) Ring-Expansion Metathesis Polymerization: Catalyst-Dependent Polymerization Profiles. Journal of the American Chemical Society, 131 (7). pp. 2670-2677. ISSN 0002-7863. PMCID PMC2658644. https://resolver.caltech.edu/CaltechAUTHORS:20090902-085242708 ...
Summary The field of C-H bond activation has evolved at an exponential pace in the last 15 years. What appeals most in those novel synthetic techniques is clear: they bypass the pre-activation steps usually required in traditional cross-coupling chemistry by directly metalating C-H bonds. Many C-H bond functionalizations today however, rely on poorly atom and step efficient oxidants, leading to significant and costly chemical waste, thereby seriously undermining the overall sustainability of those methods. As restrictions in sustainability regulations will further increase, and the cost of certain chemical commodities will rise, atom efficiency in organic synthesis remains a top priority for research. The aim of 2O2ACTIVATION is to develop novel technologies utilizing O2 as sole terminal oxidant in order to allow useful, extremely sustainable, thermodynamically challenging, dehydrogenative C-N and C-O bond forming coupling reactions. However, the moderate reactivity of O2 towards many catalysts ...
Summary The field of C-H bond activation has evolved at an exponential pace in the last 15 years. What appeals most in those novel synthetic techniques is clear: they bypass the pre-activation steps usually required in traditional cross-coupling chemistry by directly metalating C-H bonds. Many C-H bond functionalizations today however, rely on poorly atom and step efficient oxidants, leading to significant and costly chemical waste, thereby seriously undermining the overall sustainability of those methods. As restrictions in sustainability regulations will further increase, and the cost of certain chemical commodities will rise, atom efficiency in organic synthesis remains a top priority for research. The aim of 2O2ACTIVATION is to develop novel technologies utilizing O2 as sole terminal oxidant in order to allow useful, extremely sustainable, thermodynamically challenging, dehydrogenative C-N and C-O bond forming coupling reactions. However, the moderate reactivity of O2 towards many catalysts ...
Open Source Drug Discovery - A Limited Tutorial, M. Robertson, P. Ylioja, M. Woelfle, M. Robins, A. Williamson, K. Badiola, P. Willis, P. Olliaro, T. N. C. Wells and M. H. Todd, Parasitology 2013 in press DOI: Enhancing the Usefulness of Cross Dehydrogenative Coupling Reactions with a Removable Protecting Group, A. S.-K. Tsang, K. Ingram, J. Keiser, B. Hibbert and M. H. Todd, Org. Biomol. Chem. 2013 in press DOI: Incorporation of Bulky and Cationic Cyclam-Triazole Moieties into Marimastat Can Generate Potent MMP Inhibitory Activity Without Inducing Cytotoxicity, M. Yu, N. H. Lim, S. Ellis, H. Nagase, J. A. Triccas, P. J. Rutledge and M. H. Todd, ChemistryOpen 2013 in press Paper A Fluorescent Allosteric Scorpionate Complex Visualizes a Biological Recognition Event, M. Yu, P. J. Rutledge and M. H. Todd, ChemBioChem 2013, 14, 224-229. Paper Reversing the Triazole Topology in a Cyclam-triazole-dye Ligand Gives a 10-fold Brighter Signal Response to Zn(II) in Aqueous Solution, S. Ast, P. J. ...
Open Source Drug Discovery - A Limited Tutorial, M. Robertson, P. Ylioja, M. Woelfle, M. Robins, A. Williamson, K. Badiola, P. Willis, P. Olliaro, T. N. C. Wells and M. H. Todd, Parasitology 2013 in press DOI: Enhancing the Usefulness of Cross Dehydrogenative Coupling Reactions with a Removable Protecting Group, A. S.-K. Tsang, K. Ingram, J. Keiser, B. Hibbert and M. H. Todd, Org. Biomol. Chem. 2013, 11, 4921-4924. DOI: 10.1039/C3OB40503F Incorporation of Bulky and Cationic Cyclam-Triazole Moieties into Marimastat Can Generate Potent MMP Inhibitory Activity Without Inducing Cytotoxicity, M. Yu, N. H. Lim, S. Ellis, H. Nagase, J. A. Triccas, P. J. Rutledge and M. H. Todd, ChemistryOpen 2013 in press Paper A Fluorescent Allosteric Scorpionate Complex Visualizes a Biological Recognition Event, M. Yu, P. J. Rutledge and M. H. Todd, ChemBioChem 2013, 14, 224-229. Paper Reversing the Triazole Topology in a Cyclam-triazole-dye Ligand Gives a 10-fold Brighter Signal Response to Zn(II) in Aqueous ...
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Ann is survived by her husband, Randy of Indianapolis; her mother, Betty Lou Laramore of Plymouth; a brother, Jon (Janet McCabe) Laramore of Indianapolis; her father and mother-in-law: Jerry W. and Betty J. Johns of Indianapolis; two brothers-in-law: Brad (Karen) Johns and Stacey Johns, both of Indianapolis; four nephews: Peter Laramore, Daniel Sheehan, Andrew Johns and Matthew Johns all of Indianapolis; two nieces: Alice Laramore of Boston, Mass. and Janna Johns of Indianapolis; an aunt, Jean Schricker of Plymouth; and two cousins: George (Michele) Schricker, Jr. of Plymouth and Sara (Jonathan) Klein of Park City, Utah. She was preceded in death by her father, William F. Laramore, June 15, 2011 ...
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The larger cycloalkanes, with more than 20 carbon atoms are typically called cycloparaffins. The cycloalkanes without side ...
... and cycloparaffins), and 25% aromatic hydrocarbons (including naphthalenes and alkylbenzenes). The average chemical formula for ...
... cycloparaffins MeSH D02.455.426.392.368.075 --- adamantane MeSH D02.455.426.392.368.075.750 --- rimantadine MeSH D02.455. ...
... cycloparaffins (cyclopentane, cyclohexane, ethylcyclopentane, etc.) and aromatic hydrocarbons (benzene, toluene, xylene, etc ...
CAPRIFICATIONS CRAFTSMANSHIPS CYCLOPARAFFINS ... PREFABRICATORS PREMANUFACTURE SUFFRAGANSHIPS. Every word on this site can be ... cycloparaffins n. plural of cycloparaffin.. DRAFTSMANSHIPS. -. draftsmanships n. plural of draftsmanship. ...
Cycloparaffins: Alicyclic hydrocarbons in which three or more of the carbon atoms in each molecule are united in a ring ... Cycloparaffins (Cycloalkenes). Subscribe to New Research on Cycloparaffins Alicyclic hydrocarbons in which three or more of the ...
A group contribution molecular model of liquids and solutions part III: Groups and interactions in aromatics, cycloparaffins, ... cycloparaffins, ethers amines, and their solutions. AIChE J., 30: 662-665. doi: 10.1002/aic.690300424 ...
"Cycloparaffins" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical Subject ... This graph shows the total number of publications written about "Cycloparaffins" by people in this website by year, and whether ... Below are the most recent publications written about "Cycloparaffins" by people in Profiles. ... "Cycloparaffins" was a major or minor topic of these publications. To see the data from this visualization as text, click here. ...
Lead susceptibility of paraffins, cycloparaffins, and olefins Description: General relationships for the lead susceptibilities ... of paraffins, cycloparaffins, and olefins are presented. Methods are described by which the lead response may be estimated for ...
The PDB archive contains information about experimentally-determined structures of proteins, nucleic acids, and complex assemblies. As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations relating to sequence, structure and function. These molecules are visualized, downloaded, and analyzed by users who range from students to specialized scientists.
... paraffins and cycloparaffins such as pentane, hexane and cyclohexane; aromatic compounds, such as toluene, diethylbenzene and ...
Kaarsemaker, S.; Coops, J., Thermal quantities of some cycloparaffins. Part III. Results of measurements, Rec. Trav. Chim. Pays ...
In a battery of neurobehavioral tests, the NOAECs for acute CNS effects were determined to be ,= 2500mg/m3 for cycloparaffins ...
Cycloparaffins (except cyclopentane). Examples: cyclohexane, methyl cyclopentane. Olefins (except butadiene). Examples: octene ...
Categories: Cycloparaffins Image Types: Photo, Illustrations, Video, Color, Black&White, PublicDomain, CopyrightRestricted 1 ...
Cycloparaffins [D02.455.426.392.368]. *Cyclohexanes [D02.455.426.392.368.367]. *Cyclohexenes [D02.455.426.392.368.367.379] ...
Cycloparaffins [D02.455.426.392.368]. *Adamantane [D02.455.426.392.368.075]. *Rimantadine [D02.455.426.392.368.075.750] ...
SBPs such as Heptane consist of paraffins and cycloparaffins in the C6-C10 range. Thanks to their simple composition, narrow ...
The larger cycloalkanes, with more than 20 carbon atoms are typically called cycloparaffins. The cycloalkanes without side ...
Cycloparaffins and olefins exhibit values that lie between those for paraffins and aromatics. In homologous series the aniline ...
of aromatic hydrocarbons, 73% of cycloparaffins, and no more than a trace of normal paraffin hydrocarbons. The number average ...
... cycloparaffins, and aromatics).] Clear liquid with a characteristic odor. ... cycloparaffins, and aromatics).] ...
Aromatic rings hydrogenated to cycloparaffins.  Carbon-carbon bonds cleaved to open aromatic. &cycloparaffins (naphthenes) ... aromatics & cycloparaffins. (naphthenes). Hydrocracking Chemistry.  Hydrogenation reactions.  Exothermic giving heat.  ...
Cycloparaffins Chemical Compounds * Photonic crystal fibers Chemical Compounds * Optics and Photonics Medicine & Life Sciences ...
Cyclo-paraffins had the slowest - longest IGDs. Various methods were used to determine the IGD of the various fuels. The ...
chain paraffins, cycloparaffins, olefins and aromatics) with * small amounts of other organic compounds containing N, O ...
Alicyclic groups include cycloparaffins or naphthenes which are saturated cyclic hydrocarbons, cycloolefins which are ... Examples of cycloparaffins include cyclopropane, cyclohexane, and cyclopentane. Examples of cycloolefins include ...
Microbial degradation and assimilation of n-alkyl-substituted cycloparaffins. J Bacteriol 118(2), 394-399, 1974 ...
Microbial degradation and assimilation of n-alkyl-substituted cycloparaffins. J Bacteriol 118(2), 394-399, 1974 ...
0016] Naphthenes are cycloparaffins having one or more cyclic rings. The rings may have 5 or more carbon atoms and may be ...
This fuel may consist of straight chain or branch chain paraffins, cycloparaffins, olefins, aromatic hydrocarbons or any ...
Cycloparaffins [D02.455.426.392.368]. *Cyclohexanes [D02.455.426.392.368.367]. *Cyclohexenes [D02.455.426.392.368.367.379] ...
It is emphasized that the belief that paraffins have relatively high cetane ratings as compared to aromatics and cycloparaffins ...
  • SBPs such as Heptane consist of paraffins and cycloparaffins in the C6-C10 range. (shell.com)
  • Cycloparaffins and olefins exhibit values that lie between those for paraffins and aromatics. (astm.org)
  • The individual components can be categorized into basic groups (paraffins, cycloparaffins, aromatics, and olefins), and these groups are common to both jet fuels. (cdc.gov)
  • Gasoline consists of branched paraffins, cycloparaffins and aromatics with carbon numbers typically from C 4 to C 12 . (engineeringtoolbox.com)
  • A complex combination of hydrocarbons consisting primarily of paraffins, cycloparaffins, aromatic and olefinic hydrocarbons having carbon numbers predominantly greater than C3 and boiling in the range of 30°C to 260°C (86°F to 500°F). (europa.eu)
  • Our offered solvents consist of paraffins and cycloparaffins. (mdvk.in)
  • Aromatic hydrocarbons exhibit the lowest values and paraffins the highest, with cycloparaffins and olefins exhibiting intermediate values. (energyinst.org)
  • bio-jet fuel) due to the absence of aromatic hydrocarbons and cycloparaffins in biomass-derived. (aiche.org)
  • As macrocyclic compounds , Cycloparaffins are alicyclic hydrocarbons with three or more of the carbon atoms in each molecule, united in a ring structure, and each of the ring carbon atoms joined to two hydrogen atoms or alkyl groups. (wellnessadvantage.com)
  • Cycloalkanes which are also known as cycloparaffins are saturated hydrocarbons. (wordpress.com)
  • This product is a high-purity mixture of hydrotreated isoparaffins, cycloparaffins, and naphthenics with minimal levels of polynuclear aromatics. (ecolink.com)
  • The larger cycloalkanes, with more than 20 carbon atoms are typically called cycloparaffins. (wikipedia.org)
  • They are referred to as cycloalkanes , cycloparaffins or naphthenes . (libretexts.org)