... of diffusion currerts in the reduction of formic, acetic, isobutyric, isovaleric and chloroacetic acids in alkaline and strongly acid media indicates that ...
DTIC Science & Technology
The compositions are useful as adhesives and cellular plastics. The composition consists of tetra-O-ptolylsulfonyl-sucrose plasticized with sucrose acetate isobutyrate.
National Technical Information Service (NTIS)
Introduction: Sucrose acetate isobutyrate (SAIB) is a water insoluble, biodegradable gel used for controlled-release oral and subcutaneous drug delivery. We investigated SAIB compatibility in the rat central nervous system (CNS) by implanting solutions of SAIB in adult and in neonatal brains. Methods: 10-15 {mu}L solutions of SAIB ...
Energy Citations Database
An EPR study of x-ray irradiated isobutyrate and n-butyrate doped strontium acetate hemihydrate has been made. The n-butyrate radical exhibited anistropy while the isobutyrate did not. The n-butyrate radical ion has a spectrum of 8 lines of equal intensit...
The trematodes Eurytrema pancreaticum and Calicophoron ijimai during the incubation in vitro assimilated glucose from the incubation medium and utilized the endogenous glycogen. Final products of the carbohydrate metabolism in the calicophorones were lactic, acatic, propionic, isobutyric and alpha-methylbutyric acids; in the eurytremes they were lactic, ...
PubMed
Information profiles are presented on these organic anhydrides: acetic-anhydride (108247), butyric-anhydride (106310), citraconic-anhydride (616024), dodecenylsuccinic-anhydride (25377735), isobutyric-anhydride (97723), maleic-anhydride (108316), phthalic...
...federal_regulations/ibr_locations.html. (5) Triacetin: Not to exceed 0.10 percent determined by gas chromatography as described in the �Guide to Specifications for General Notices, General Analytical Techniques,...
Code of Federal Regulations, 2011
1. The gas�liquid-chromatographic separations of the acetate, propionate, n-butyrate, isobutyrate and n-valerate esters of androsterone, aetiocholanolone and dehydroepiandrosterone were studied on a 1% neopentyl glycol sebacate column. The n-butyrate, isobutyrate and n-valerate esters were well resolved. 2. The three steroids derived ...
PubMed Central
... GELS, POROUS MATERIALS, ACIDS, ELECTROLYTIC CELLS, CARBOXYMETHYLCELLULOSE, POLARIZATION, CELLULOSE ACETATES ...
On the basis of gas-liquid chromatography (GLC) technique of quantitative determination in food, and biologically active additives (BAA) to food short-chain fatty acids: acetic, propionic, butyric, isobutyric, valeric and isovaleric. For this purpose, we used the method of GLC with a plasma-ionization detection, which allowed us to determine the amount of ...
... analytical silica gel tlc plates using mixtures of ethyl ... Thin layer chromatographic analyses were performed on Merck silica gel 60 ...
Alcoholic preparations of Arnica montana are widely used for the topical treatment of various inflammatory diseases. Sesquiterpene lactones (SLs) are mainly responsible for their anti-inflammatory activity. Here we have studied the penetration kinetics of Arnica tinctures prepared from dried Arnica flowers originating from different chemotypes as well as of their respective dominating SLs, ...
Our understanding of the ruminal epithelial tissue-associated bacterial (defined as epimural bacteria in this study) community is limited. In this study, we aimed to determine whether diet influences the diversity of the epimural bacterial community in the bovine rumen. Twenty-four beef heifers were randomly assigned to either a rapid grain adaptation (RGA) treatment (n = 18) in which the heifers ...
2-Hydroxy-6-oxo-7-methylocta-2,4-dienoate hydrolase (CumD) from Pseudomonas fluorescens IP01 hydrolyzes a meta-cleavage product generated in the cumene (isopropylbenzene) degradation pathway. The crystal structures of the inactive S103A mutant of the CumD enzyme complexed with isobutyrate and acetate ions were determined at 1.6 and 2.0 ? resolution, ...
... becaplermin and the following inactive ingredients: sodium chloride, sodium acetate ... saline or water to remove residual gel and covered with a ... Drug Interactions ...
Center for Drug Evaluation (CDER)
... ingredients include cocoamphodi-acetate, aloe gel, lanolin, water, propylene glycol, preservatives and an adult fragrance. ...
... may lead to useful water and oil ... of the active site with acetate substrates containing ... Sodium dodecyl sulfate (SDS) polyacrylamide gel equipment ...
by submersion of the gel in calcium acetate solution. Ca/P molar ratios were varied in the range of 0. This fixture was submersed in a beaker containing 10 ml of calcium acetate solution, of varying molarities (0 phosphate- trapped gels in calcium acetate solution. The solution was stirred ...
E-print Network
A systematic study of six types of silica gels was undertaken to determine the role of gel pore diameter in the chromatographic resolution of sterol acetates. The gels were characterized in terms of surface area, pore volume, average pore diameter, and density. A criterion analogous to the plate concept ...
From the silty sediments of the Khadyn soda lake (Tuva), a binary sulfidogenic bacterial association capable of syntrophic acetate oxidation at pH 10.0 was isolated. An obligately syntrophic, gram-positive, spore-forming alkaliphilic rod-shaped bacterium performs acetate oxidation in a syntrophic association with a hydrogenotrophic, alkaliphilic ...
The relative hydroxyl (OH) reaction rates from the simulated atmospheric oxidation of several acetates and other oxygenated organic compounds have been measured. The OH radical was from the photolysis of methyl nitrite in air. The reaction products of 2-ethoxyethyl acetate with OH identified and quantified and a reaction mechanism is proposed. The measured ...
was an acetate buffer with acetic acid as a buffering agent having pK, = 4.76 at 25�C. All the swelling studies transport in poly(Bhydroxyethyl methacrylate-co-methacrylic acid) gels swollen in acetate buffer of varying(2-hydroxyethyl methacrylate-co- acrylic acid) gels swollen in ...
Information profiles are presented on these organic anhydrides: acetic anhydride, butyric anhydride, citraconic anhydride, dodecenylsuccinic anhydride, isobutyric anhydride, maleic anhydride, phthalic anhydride, propionic anhydride, pyromellitic dianhydride, succinic anhydride, tetrahydrophthalic anhydride, and trimellitic anhydride. The organic anhydrides ...
Spirochete MA-2, which is anaerobic, ferments glucose, forming acetate as a major product. The spirochete also ferments (but does not utilize as growth substrates) small amounts of l-leucine, l-isoleucine, and l-valine, forming the branched-chain fatty acids isovalerate, 2-methylbutyrate, and isobutyrate, respectively, as end products. Energy generated ...
Fluoride and acetate-responsive polymer gels were prepared by incorporation of p-nitrophenylthiourea into poly(octadecyl acrylate) gels, and the colours and volumes were changed selectively in the presence of these ions by complexation in THF. PMID:21116518
The interactions of the three sesquiterpene lactones (SLs) dihydrohelenalin acetate, dihydrohelenalin methacrylate and helenalin isobutyrate from Arnica montana and of parthenolide from Tanacetum parthenium as well as of three ethanolic Arnica preparations with human blood proteins using different matrices, human serum albumin (HSA), plasma and whole ...
YBa{sub 2}Cu{sub 4}O{sub x} sols were prepared by addition of ammonia to acidic acetate solutions of Y{sup 3+}, Ba{sup 2+}, and Cu{sup 2+}. Ascorbic acid was added to part of the sol. The resultant sols were gelled to a shard or a coating by evaporation at 60 C. Addition of ethanol to the sols facilitated formation of gel coatings, fabricated by a dipping ...
Eighteen phorbol and 4-deoxy-4..cap alpha..-phorbol mono-and diesters have been isolated from croton oil, the seed oil of Croton tiglium L., using a rapid and efficient purification procedure consisting of initial solvent partition followed by droplet counter-current chromatography, reversed-phase chromatography, and preparative thin-layer chromatography. Their structures were determined using ...
PLZT gels were prepared from lead acetate hydrate, lanthanum acetate hydrate, titanium isopropoxide and zirconium n-propoxide in methoxyethanol by the sol-gel method. For the purpose of the present study HNMR and GLC analyses were performed for quantitative determination of the volatile reaction products formed ...
Hafnia and zirconia gels were prepared by drying hafnyl or zirconyl acetate solutions. Hafnia and zirconia gels contain both hydroxyl group and bidentate acetates which are directly bonded to the metal ions. Thermal decomposition and crystallization behavior of the gels were investigated ...
A simple, stable, and transferable coculture of Clostridium collagenovorans and Methanosarcina barkeri that readily degraded gelatin into methane and carbon dioxide was developed. In monoculture, C. collagenovorans fermented all of the amino acids in gelatin except proline into acetate and carbon dioxide as the main products, with hydrogen, isovalerate, and ...
Sols were prepared by addition of ammonia to acidic acetate solutions of Y{sup 3+}, Ba{sup 2+}, and Cu{sup 2+}. Ascorbic acid was added to a part of the sol. The resultant sols were gelled to a shard, a film, or microspheres by evaporation at 60 C or by extraction of water from drops of emulsion suspended in 2-ethylhexanol-1. Addition of ethanol to the sols facilitated the ...
DOE Information Bridge
ABSTRACT Liquid swine manure added to acidic soils killed microsclerotia of the wilt fungus Verticillium dahliae. We investigated whether volatile fatty acids (VFAs) in the manure were responsible for this toxicity. The survival of microsclerotia was determined after exposure to various dilutions of manure or its VFA components. Acetic, propionic, and ...
The contribution of volatile fatty acids (VFA) as e(-)-donors for anaerobic terminal oxidation of organic carbon through iron and sulfate reduction was studied in Arctic fjord sediment. Dissolved inorganic carbon, Fe(2+), VFA concentrations, and sulfate reduction were monitored in slurries from the oxidized (0-2 cm) and the reduced (5-9 cm) zone. In the 0-2 cm layer, 2/3 of the mineralization ...
Phenylmercuric acetate is white to white-yellow crystalline powder that is odorless. This phenyl mercury compound is used mainly as a fungicide, herbicide, slimicide and bacteriocide. Phenylmercuric acid serves as a preservative in canned paint, eye ointments and drops, injectable solutions, skin disinfectants and in cosmetics products such as hair shampoos, mouthwashes and ...
NSDL National Science Digital Library
]. In sol�gel studies, acetic acid and acetylacetone are most often applied for this purpose [9]. Acetic showed [10] that the sta- bilizing effect with acetylacetone disappears beyond addition of 1 mol
Sol-gel processing methods are frequently used for the fabrication of lead zirconate titanate (PZT) thin films for many electronic applications. Our standard approach for film fabrication utilizes lead acetate and acetic acid modified metal alkoxides of z...
The novel radioactive compound /sup 18/F-4-fluoroantipyrine having high specific activity which can be used in nuclear medicine in diagnostic applications, prepared by the direct fluorination of antipyrine in acetic acid with radioactive fluorine at room temperature and purifying said radioactive compound by means of gel chromatography with ethyl ...
The novel radioactive compound .sup.18 F-4-fluoroantipyrine having high specific activity which can be used in nuclear medicine in diagnostic applications, prepared by the direct fluorination of antipyrine in acetic acid with radioactive fluorine at room temperature and purifying said radioactive compound by means of gel chromatography with ethyl ...
... SO4 . 2. Adsorption chromatography with Amberlite XAD-2, the toxin is eluted with 1% acetic acid, 99% methanol. 3. Gel ...
... fossils with comparatively pronounced relief, were obtained with methyl acetate gel glue. Well-preserved examples were mounted on ... ...
NBII National Biological Information Infrastructure
... C. For the synthesis of precursor sols the n-propoxides of Zr and Ti were reacted with chelating agents acetylacetone, ethyleneglycole, acetic acid ...
... Three synthesis procedures were developed and compared, using acetylacetone (acac, with HCI) and acetic acid (HOAc) as modifying agents ...
... Mass spectra of some pyrroline nitroxide free radicals; Partitioning in gel chromatography, The diffusion of polystyrene in ethyl acetate and ethyl ...
... Sumoylated products were detected by fixing SDS�PAGE gels in acetic acid ... 7. Bakkenist, CJ & Kastan, MB DNA damage activates ATM through ...
180ml Coomassie blue G250 0.05g Mix 1 hr. store RT #12;12. Destaining buffer: 50 parts acetic up Prepare running if needed (50ml 10X trissds�500ml dwater) Resolution gel should be hard now for gel to harden. While waiting for stacking gel to harden: 2. Prepare samples: 1) Get ice, turn heat
system, suggesting hydrogen-bonding interactions may be the major route initiating the sol- gel process concentrations, phase separation can lead to physical gel formation.21 Gelation occurs as a result of nonsolvent on the solvent system, CA will exhibit varying solution properties, where the sol-gel transition and ...
This patent describes a subterranean formation having channels which have a high permeability to the flow of fluids. A process for retarding fluid flow in the channels comprises: providing a gel-forming composition which when substantially completely gelled in the high permeability channels is operable for retarding fluid flow therein. The gel-forming ...
