Borohydrides: A class of inorganic or organic compounds that contain the borohydride (BH4-) anion.IndianaBiological Science Disciplines: 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.Cycloparaffins: 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)Galactose Oxidase: An enzyme that oxidizes galactose in the presence of molecular oxygen to D-galacto-hexodialdose. It is a copper protein. EC 1.1.3.9.Pyridoxal Phosphate: This is the active form of VITAMIN B 6 serving as a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. During transamination of amino acids, pyridoxal phosphate is transiently converted into pyridoxamine phosphate (PYRIDOXAMINE).Periodic Acid: A strong oxidizing agent.Metals, Alkali: Metals that constitute group 1(formerly group Ia) of the periodic table. They are the most strongly electropositive of the metals. Note that HYDROGEN is not considered an alkali metal even though it falls under the group 1 heading in the periodic table.Metals: Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed)Rubidium: An element that is an alkali metal. It has an atomic symbol Rb, atomic number 37, and atomic weight 85.47. It is used as a chemical reagent and in the manufacture of photoelectric cells.Cesium: A member of the alkali metals. It has an atomic symbol Cs, atomic number 50, and atomic weight 132.91. Cesium has many industrial applications, including the construction of atomic clocks based on its atomic vibrational frequency.Lithium: An element in the alkali metals family. It has the atomic symbol Li, atomic number 3, and atomic weight [6.938; 6.997]. Salts of lithium are used in treating BIPOLAR DISORDER.Methanol: A colorless, flammable liquid used in the manufacture of FORMALDEHYDE and ACETIC ACID, in chemical synthesis, antifreeze, and as a solvent. Ingestion of methanol is toxic and may cause blindness.Sulfuric Acids: Inorganic and organic derivatives of sulfuric acid (H2SO4). The salts and esters of sulfuric acid are known as SULFATES and SULFURIC ACID ESTERS respectively.Industry: Any enterprise centered on the processing, assembly, production, or marketing of a line of products, services, commodities, or merchandise, in a particular field often named after its principal product. Examples include the automobile, fishing, music, publishing, insurance, and textile industries.Hydrogen: The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight [1.00784; 1.00811]. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.Nose Diseases: Disorders of the nose, general or unspecified.Sodium: A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.Gases: The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)Electrolysis: Destruction by passage of a galvanic electric current, as in disintegration of a chemical compound in solution.Conductometry: Determination of the quantity of a material present in a mixture by measurement of its effect on the electrical conductivity of the mixture. (Webster, 3d ed)Ruthenium: A hard, brittle, grayish-white rare earth metal with an atomic symbol Ru, atomic number 44, and atomic weight 101.07. It is used as a catalyst and hardener for PLATINUM and PALLADIUM.Hydrogenase: An enzyme found in bacteria. It catalyzes the reduction of FERREDOXIN and other substances in the presence of molecular hydrogen and is involved in the electron transport of bacterial photosynthesis.Aziridines: Saturated azacyclopropane compounds. They include compounds with substitutions on CARBON or NITROGEN atoms.Cyclization: Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)IminesStereoisomerism: The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Azirines: Unsaturated azacyclopropane compounds that are three-membered heterocycles of a nitrogen and two carbon atoms.Alkadienes: Acyclic branched or unbranched hydrocarbons having two carbon-carbon double bonds.Propanols: Isomeric forms and derivatives of PROPANOL (C3H7OH).Palladium: A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.Catalysis: The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.Alkenes: Unsaturated hydrocarbons of the type Cn-H2n, indicated by the suffix -ene. (Grant & Hackh's Chemical Dictionary, 5th ed, p408)Catheter Ablation: Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. Energy sources are commonly direct current (DC-shock) or alternating current at radiofrequencies (usually 750 kHz). The technique is used most often to ablate the AV junction and/or accessory pathways in order to interrupt AV conduction and produce AV block in the treatment of various tachyarrhythmias.Chemical EngineeringComputer Storage Devices: Devices capable of receiving data, retaining data for an indefinite or finite period of time, and supplying data upon demand.United States Department of Agriculture: A cabinet department in the Executive Branch of the United States Government concerned with improving and maintaining farm income and developing and expanding markets for agricultural products. Through inspection and grading services it safeguards and insures standards of quality in food supply and production.Drug Stability: The chemical and physical integrity of a pharmaceutical product.Magnesium: A metallic element that has the atomic symbol Mg, atomic number 12, and atomic weight 24.31. It is important for the activity of many enzymes, especially those involved in OXIDATIVE PHOSPHORYLATION.Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Iodine: A nonmetallic element of the halogen group that is represented by the atomic symbol I, atomic number 53, and atomic weight of 126.90. It is a nutritionally essential element, especially important in thyroid hormone synthesis. In solution, it has anti-infective properties and is used topically.Chemistry, Organic: The study of the structure, preparation, properties, and reactions of carbon compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Chemistry Techniques, Synthetic: Methods used for the chemical synthesis of compounds. Included under this heading are laboratory methods used to synthesize a variety of chemicals and drugs.Organic Chemistry Processes: The reactions, changes in structure and composition, the properties of the reactions of carbon compounds, and the associated energy changes.Patient Access to Records: The freedom of patients to review their own medical, genetic, or other health-related records.Glass: Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.Cosmic Dust: Finely divided solid matter with particle sizes smaller than a micrometeorite, thus with diameters much smaller than a millimeter, moving in interplanetary space. (NASA Thesaurus, 1994)Plastics: Polymeric materials (usually organic) of large molecular weight which can be shaped by flow. Plastic usually refers to the final product with fillers, plasticizers, pigments, and stabilizers included (versus the resin, the homogeneous polymeric starting material). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Meteoroids: Any solid objects moving in interplanetary space that are smaller than a planet or asteroid but larger than a molecule. Meteorites are any meteoroid that has fallen to a planetary surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Marketing: Activity involved in transfer of goods from producer to consumer or in the exchange of services.Research Report: Detailed account or statement or formal record of data resulting from empirical inquiry.Foundations: Organizations established by endowments with provision for future maintenance.Dietetics: The application of nutritional principles to regulation of the diet and feeding persons or groups of persons.Journalism, Medical: The collection, writing, and editing of current interest material on topics related to biomedicine for presentation through the mass media, including newspapers, magazines, radio, or television, usually for a public audience such as health care consumers.

Crystal structure of human muscle aldolase complexed with fructose 1,6-bisphosphate: mechanistic implications. (1/466)

Fructose 1,6-bisphosphate aldolase catalyzes the reversible cleavage of fructose 1,6-bisphosphate and fructose 1-phosphate to dihydroxyacetone phosphate and either glyceraldehyde 3-phosphate or glyceraldehyde, respectively. Catalysis involves the formation of a Schiff's base intermediate formed at the epsilon-amino group of Lys229. The existing apo-enzyme structure was refined using the crystallographic free-R-factor and maximum likelihood methods that have been shown to give improved structural results that are less subject to model bias. Crystals were also soaked with the natural substrate (fructose 1,6-bisphosphate), and the crystal structure of this complex has been determined to 2.8 A. The apo structure differs from the previous Brookhaven-deposited structure (1ald) in the flexible C-terminal region. This is also the region where the native and complex structures exhibit differences. The conformational changes between native and complex structure are not large, but the observed complex does not involve the full formation of the Schiff's base intermediate, and suggests a preliminary hydrogen-bonded Michaelis complex before the formation of the covalent complex.  (+info)

Serine transhydroxymethylase from rabbit liver. Sequence of anonapeptide at the pyridoxal-5'-phosphate-binding site. (2/466)

The amino acid sequence of the coenzyme-binding site of serine transhydroxymethylase from rabbit liver has been determined. After reduction with NaBH4 and aminoethylation, a first sample of enzyme was digested with thermolysin and a single phosphopyridoxyl peptide was isolated. A second sample of similarly treated enzyme was digested with chymotrypsin and three phosphopyridoxyl peptides clearly originating from a unique coenzyme-binding site were isolated. Sequence analysis of these peptides indicate the following structure: Val-Val-Thr-Thr-His(Pxy)-Thr-Leu. Sequence homologies of the active site of various pyridoxalphosphate enzymes are discussed in terms of a possible catalytic role and of evolution of this class of proteins.  (+info)

Radioactive labelling of ribosomal proteins with reductive alkylation and its use in studying ribosome-cytosol interactions. (3/466)

Mouse brain ribosomes were radioactively labelled by a cell-free reductive alkylation reaction with NaBH4 and [14C]formaldehyde. The radioactivity was largely associated with ribosomal proteins, but little, if any, of the rRNA was radioactive after the alkylation procedure. Both ribosomal structural proteins and loosely associated components were successfully labelled by this procedure. The sedimentation properties of the ribosomes were unaltered and their ability to carry out poly(U)-directed protein synthesis, although decreased, was largely retained. Incubation of 14C-labelled ribosomes with brain cytosol resulted in a 17% loss of radioactivity, although treatment of the ribosomes with 1.0 m-KCl to remove the loosely associated factors rendered the ribonucleoprotein particles resistant to cytosol effects. The ribosome-cytosol interactions did not appear to be related to an exchange process, since the released radioactivity was largely degraded to acid-soluble material. In addition, the incubation of native ribosomes with brain cytosol resulted in an almost complete loss in the ability of the ribosomes to participate in cell-free protein synthesis.  (+info)

The iron sulfur protein AtsB is required for posttranslational formation of formylglycine in the Klebsiella sulfatase. (4/466)

The catalytic residue of eukaryotic and prokaryotic sulfatases is a alpha-formylglycine. In the sulfatase of Klebsiella pneumoniae the formylglycine is generated by posttranslational oxidation of serine 72. We cloned the atsBA operon of K. pneumoniae and found that the sulfatase was expressed in inactive form in Escherichia coli transformed with the structural gene (atsA). Coexpression of the atsB gene, however, led to production of high sulfatase activity, indicating that the atsB gene product plays a posttranslational role that is essential for the sulfatase to gain its catalytic activity. This was verified after purification of the sulfatase from the periplasm of the cells. Peptide analysis of the protein expressed in the presence of AtsB revealed that half of the polypeptides carried the formylglycine at position 72, while the remaining polypeptides carried the encoded serine. The inactive sulfatase expressed in the absence of AtsB carried exclusively serine 72, demonstrating that the atsB gene is required for formylglycine modification. This gene encodes a 395-amino acid residue iron sulfur protein that has a cytosolic localization and is supposed to directly or indirectly catalyze the oxidation of the serine to formylglycine.  (+info)

Reaction centers of photosystem II with a chemically-modified pigment composition: exchange of pheophytins with 13(1)-deoxo-13(1)-hydroxy-pheophytin a. (5/466)

Isolated reaction centers of photosystem II with an altered pigment content were obtained by chemical exchange of the native pheophytin a molecules with externally added 13(1)-deoxo-13(1)-hydroxy-pheophytin a. Judged from a comparison of the absorption spectra and photochemical activities of exchanged and control reaction centers, 70-80% of the pheophytin molecules active in charge separation are replaced by 13(1)-deoxo-13(1)-hydroxy-pheophytin a after double application of the exchange procedure. The new molecule at the active branch was not active photochemically. This appears to be the first stable preparation in which a redox active chromophore of the reaction center of photosystem II was modified by chemical substitution. The data are compatible with the presence of an active and inactive branch of cofactors, as in bacterial reaction centers. Possible applications of the 13(1)-deoxo-13(1)-hydroxy-pheophytin a-exchanged preparation to the spectral and functional analysis of native reaction centers of photosystem II are discussed.  (+info)

Reactions of lipid-derived malondialdehyde with collagen. (6/466)

Malondialdehyde is a product of fatty acid oxidation (e.g. from low density lipoprotein) implicated in the damage of proteins such as collagen in the cardiovascular system (Chio, K. J., and Tappel, A. L. (1969) Biochemistry 8, 2821-2827). Its concentration is raised in diabetic subjects probably as a side effect of increased protein glycation. Collagen has enzyme-catalyzed cross-links formed between its individual molecules that are essential for maintaining the structure and flexibility of the collagen fiber. The cross-link dehydro-hydroxylysinonorleucine reacts irreversibly with 10 mM malondialdehyde at least 3 orders of magnitude faster than glucose reactions with lysine or arginine, such that there is little cross-link left after 1 h at 37 degrees C. Other cross-links and glycated elements of collagen are also vulnerable. Several possible products of malondialdehyde with collagen cross-links are proposed, and the potential involvement of collagenous histidine in these reactions is discussed. We have also isolated Ndelta-(2-pyrimidyl)-L-ornithine from collagenous arginine reacted with malondialdehyde. The yields of this product were considerably higher than those from model reactions, being approximately 2 molecules/collagen molecule after 1 day at 37 degrees C in 10 mM malondialdehyde. Collagenous lysine-derived malondialdehyde products may have been present but were not protected from protein acid hydrolysis by standard reduction techniques, thus resulting in a multitude of fragmented products.  (+info)

The immobilization of adenine nucleotides on polysaccharides by using glutaraldehyde coupling and borohydride reduction. (7/466)

Adenine nucleotides were immobilized on modified Sepharose 4B or Dextran T40 with glutaraldehyde and reduced with KBH4. Binding was dependent on pH and the nature of the amino group on the modified polysaccharide. ATP bound to soluble dextran retained coenzyme activity with glycerol kinase. Binding is proposed to occur via a Schiff base.  (+info)

Reovirus messenger RNA contains a methylated, blocked 5'-terminal structure: m-7G(5')ppp(5')G-MpCp-. (8/466)

Reovirus mRNA synthesized in vitro by the virus-associated RNA polymerase in the presence of S-adenosylmethionine contains blocked, methylated 5'-termini with the structure, m-7G(5')ppp(5')G-MpCp. The functional significance and possible mechanism of formation of this novel 5'-5' terminal nucleotide linkage are discussed.  (+info)

Dottavio-Martin, D.; Ravel, J.M., 1978: Radiolabeling of proteins by reductive alkylation with [14C]formaldehyde and sodium cyanoborohydride
Business Directory for Sodium Borohydride Suppliers in Mumbai - Get contact details of Sodium Borohydride Manufacturers, Wholesale Sodium Borohydride Exporters, Best Sodium Borohydride Traders & Distributors Across the Mumbai.
Sodium borohydride is of interest as a source for a hydrogen generation during its catalytic hydrolysis. Various catalysts have been developed for this purpose. In the present study the graphene supported platinum-ruthenium-cobalt catalysts (denoted as PtRuCo/GR) with the different Pt:Ru:Co molar ratios, prepared by means of microwave-assisted synthesis, were used as catalysts towards hydrogen generation via sodium borohydride hydrolysis. The morphology and composition of catalysts were examined using Field Emission Scanning Electron Microscopy and Inductively Coupled Plasma Optical Emission Spectroscopy. Catalytic activity of PtRuCo/GR with the different Pt:Ru:Co molar ratios was determined by measuring the amount of hydrogen generated directly from aqueous alkaline solutions of sodium borohydride and compared with that of Co/GR. The data on hydrogen generation volume with respect to time at different concentrations of sodium borohydride and different temperatures have been presented. It has ...
Browse detailed TOC, Tables, Figures, Charts and Companies mentioned in Europe Sodium Borohydride Market research report @ http://www.absolutereports.com/europe-sodium-borohydride-market-report-2016-10413257. Further in the report, the Europe Sodium Borohydride market is examined for price, cost and gross. These three points are analysed for types, companies and regions. In continuation with this data sale price is for various types, applications and region is also included. The Europe Sodium Borohydride Industry for major regions is given. Additionally, type wise and application wise figures are also given.. Market Segment by Regions, this report splits Europe into several key Regions, with sales (consumption), revenue, market share and growth rate of Europe Sodium Borohydride in these regions, from 2011 to 2021 (forecast), like. Germany. France. UK. Italy. Spain. Russia. Benelux. Have a query? Ask our expert: http://www.absolutereports.com/enquiry/pre-order-enquiry/10413257. For each player, ...
Authors: MEVLUT SERDAR, NURHAN GÜMRÜKÇÜOĞLU, ŞENGÜL ALPAY KARAOĞLU, NESLİHAN DEMİRBAŞ Abstract: A series of acylhydrazones (2a-d) was synthesized from the reactions of iminoester hydrochlorides (1a-e) with acyl hydrazines. 2,5-Dialkyl 1,3,4-oxadiazoles (3a-d) were obtained in the same reaction media. The treatment of acylhydrazones with hydrazine hydrate afforded 4-amino-3,5-dialkyl-1,2,4-triazoles (4a-c). The acetylation of 4-amino-3-(4-hydroxyphenyl)-5-phenyl-4H-1,2,4-triazole (4a) produced 4-amino-5-(4-acetoxyphenyl)-3-phenyl-4H-1,2,4-triazole (9), while the acetylation of 4-amino-3-(4-tolyl)-5-phenyl-4H-1,2,4-triazole (4b) gave 4-acetylamino-3-phenyl-5-(4-tolyl)-4H-1,2,4-triazole (10). The treatment of compound 4b with various aromatic aldehydes or acetophenone and 4-nitroacetophenone resulted in the formation of 4-arylidenamino-3,5-dialkyl-4H-1,2,4-triazoles (5a-e and 7a,b). Sodium borohydride reduction of 4-arylidenamino derivatives of 1,2,4-triazoles afforded ...
A compact solid source of hydrogen gas, where the gas is generated by contacting water with micro-disperse particles of sodium borohydride in the presence of a catalyst, such as cobalt or ruthenium. The micro-disperse particles can have a substantially uniform diameter of 1-10 microns, and preferably about 3-5 microns. Ruthenium or cobalt catalytic nanoparticles can be incorporated in the micro-disperse particles of sodium borohydride, which allows a rapid and complete reaction to occur without the problems associated with caking and scaling of the surface by the reactant product sodium metaborate. A closed loop water management system can be used to recycle wastewater from a PEM fuel cell to supply water for reacting with the micro-disperse particles of sodium borohydride in a compact hydrogen gas generator. Capillary forces can wick water from a water reservoir into a packed bed of micro-disperse fuel particles, eliminating the need for using an active pump. ...
TY - JOUR. T1 - Quantitative Peptidomics with Five-plex Reductive Methylation labels. AU - Tashima, Alexandre K.. AU - Fricker, Lloyd D.. PY - 2018/5/1. Y1 - 2018/5/1. N2 - Quantitative peptidomics and proteomics often use chemical tags to covalently modify peptides with reagents that differ in the number of stable isotopes, allowing for quantitation of the relative peptide levels in the original sample based on the peak height of each isotopic form. Different chemical reagents have been used as tags for quantitative peptidomics and proteomics, and all have strengths and weaknesses. One of the simplest approaches uses formaldehyde and sodium cyanoborohydride to methylate amines, converting primary and secondary amines into tertiary amines. Up to five different isotopic forms can be generated, depending on the isotopic forms of formaldehyde and cyanoborohydride reagents, allowing for five-plex quantitation. However, the mass difference between each of these forms is only 1 Da per methyl group ...
Isomaltose oligosaccharides varying in size from two sugars, isomaltose (IM2), to seven sugars, isomaltohepatose (IM7), were coupled to stearylamine by reductive amination with sodium cyanoborohydride. Each compound was purified by column chromatography to yield a series of glycolipids containing oligosaccharides differing in length. Stearyl-isomaltotriose to stearyl-IM7 could be incorporated into liposomes and could render them agglutinable by specific antibodies to alpha 1 leads to 6 dextran and could be lysed if complement was also added, whereas those containing stearyl-IM2 were not agglutinated or lysed, indicating that stearyl-IM2 may not be protruding from the liposome surface sufficiently to react with the antibody. Stearyl-isomaltosyl oligosaccharides by themselves or incorporated into liposomes were equally antigenic when emulsified in complete Freunds adjuvant. They elicited pauciclonal responses, and the antibodies were alpha 1 leads to 6 specific, cross-reacted with dextran, and ...
N-PROPYL-MDA; 3,4-METHYLENEDIOXY-N-PROPYLAMPHETAMINE. SYNTHESIS: A total of 20 mL concentrated HCl was added beneath the surface of 20 mL propylamine, and when the addition was complete, the mixture was stripped of volatiles under vacuum. The slightly yellow residual oil weighed 20.7 g and set up to crystals on cooling. It was dissolved in 75 mL MeOH, and there was added 4.45 g of 3,4-methylenedioxyphenylacetone (see under MDMA for its preparation) followed by 1.1 g sodium cyanoborohydride. Concentrated HCl in MeOH was added as required to maintain the pH at about 6 as determined with external, dampened universal pH paper. When the generation of base had stopped, the MeOH was allowed to evaporate and the residue was suspended in 1 L water. This was made strongly acidic with an excess of HCl. After washing with CH2Cl2, the aqueous phase was made basic with 25% NaOH, and extracted with 3×100 mL CH2Cl2. Removal of the solvent from the pooled extracts under vacuum yielded 3.3 g of a pale amber oil ...
Epidemiological studies have shown an association between alcohol (ethanol) consumption and increased cancer risk. The effect of alcohol consumption on the levels and persistence of N(2)-ethylidene-2-deoxyguanosine (N(2)-ethylidene-dG) formed by acetaldehyde, the oxidative metabolite of ethanol, in human leukocyte DNA was investigated. DNA was isolated from venous blood samples obtained from 30 male non-smoking individuals before consumption of alcohol (0h) and subsequently at 3-5h following the consumption of 150mL of vodka (containing 42% pure ethanol). Additional samples were collected 24h and 48h post-alcohol consumption. The levels of N(2)-ethyl-2-deoxyguanosine (N(2)-ethyl-dG) in the DNA were determined following reduction of N(2)-ethylidene-dG with sodium cyanoborohydride using a liquid chromatography-tandem mass spectrometry selected reaction monitoring method. A slight time-dependent trend showing an increase and decrease in the levels of N(2)-ethyl-dG was observed following ...
To this sodium cyanoborohydride (186 mg, fildena uk 3 mmol) was added, and the reaction solution was stirred at room temperature for another 4 hours! The law does not prohibit multiple executions in a single day; however, Texas has not executed multiple offenders on a single day since August 9, 2000, on which two offenders were executed! Se recomienda el uso de un jabón suave no medicinal? Ginseng offered a protective effect in myocardial ischemia and reperfusion injuries. The formulation of claim 6, fildena uk wherein the formulation is stable at about 25±5° C. Cook up this simple yet sophisticated meal the next time you have friends over for dinner? An outstanding drug caught in that situation could easily be the subject of some research to produce a newer derivative or improved formulation that would be patentable, fildena uk but when you havent seen that happen, it increases the chances that the drug itself is something that probably wouldnt find much of a niche. There are many drug ...
Sodium borohydride is a element that is a normal reducing agent. It is an organic element that has a good number of diverse uses and programs. It is very frequently used in the manufacturing and production sectors to great effect. Its visual aspect is in most cases in the form of a greyish white powder element. It may act as a fairly great reducing agent when it is compounded with water or alcohol. As it is a compound, it constantly has to be handled with great treatment as it can potentially react really in a different way when it comes into contact with distinct kinds of chemical natural ingredients. It is incompatible along with additional elements such as metal salts, and sulphuric acid. Due to the point that it are able to break down quite simply, it can usually generate acidic and serious byproducts such as hydrogen gas and sodium oxide. It definitely necessities to be treated with a right amount of care when being put into use in the producing and construction industrial sectors. As a ...
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Downloadable! The paper attempts to analyse the Boro production plan for FY2009-10, considering its special importance for Bangladesh in ensuring food security situation and keeping inflation in check. It reviews the policy measures and programmes taken so far in this regard. It also reports the implementation status of various projects for delivering inputs, namely seed, fertiliser, irrigation, credit and subsidy. Finally, the paper puts forward some suggestions for achieving the target set for production and procurement of Boro rice.
Looking for potassium borohydride? Find out information about potassium borohydride. KBH4 A white, crystalline powder, soluble in water, alcohol, and ammonia; used as a hydrogen source and a reducing agent for aldehydes and ketones Explanation of potassium borohydride
We study the thermodynamic stability at low temperatures of a series of alkali-metal-zinc double-cation borohydrides, including LiZn(BH4)(3), LiZn2(BH4)(5), NaZn(BH4)(3), NaZn2(BH4)(5), KZn(BH4)(3), and KZn2(BH4)(5). While LiZn2(BH4)(5), NaZn(BH4)(3), NaZn2(BH4)(5), and KZn(BH4)(3) were recently synthesized, LiZn(BH4)(3) and KZn2(BH4)(5) are hypothetical compounds. Using the minima-hopping method, we discover two new lowest-energy structures for NaZn(BH4)(3) and KZn2(BH4)(5) which belong to the C2/c and P2 space groups, respectively. These structures are predicted to be both thermodynamically stable and dynamically stable, implying that their existence may be possible. On the other hand, we predict that the lowest-energy P1 structure of LiZn(BH4)(3) is unstable, suggesting a possible reason elucidating why this compound has not been experimentally identified. In exploring the low-energy structures of these compounds, we find that their energetic ordering is sensitive to the inclusion of the van ...
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1,4-β-D-Cellotriitol (borohydride reduced cellotriose) [MO-CTRRD] - CAS: 61473-64-1 Molecular Formula: C18H34O16 Molecular Weight: 506.4 Purity: | 95% High purity 1,4-β-D-Cellotriitol (borohydride reduced cellotriose) for use in research, biochemical enzyme assays and in vitro diagnostic analysis. Trisaccharides from hydrolysis of cellulose and borohydride reduced. Store at room temperature.
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The dimethyl labeling technique uses a reagent mixture (i.e., cyanoborohydride and formaldehyde in their unlabeled and stable isotope-labeled forms) to tag primary amines. Read more
COMMUNICATIONS Experinwntd Procedure 5a.b; 7. To a solution of 1.0mmol sodium aryltellurolate or -selenolaie (freshly prepared from diarylditellurium and -diselenium. respectively. and sodium borohydride in 20 mL of ethanol) was added triphenyltelluronium chloride (0.39 g, 1 .O mmol) in methanol (20 mL) at -60 C. Immediately a microcrystalline product precipitated After filtration at -60 -C and washing with ethanol it was dried in VHCUO. Crystals suitable for X-ray diffraction were obtained by diffusion of the dissolved starting materials at - 30 C. 5a (triphenyltelluronium4-methylphenyltellurolate): Yield 0.51 g (89%). Elemental analysis of C25H12Te2:calcd C 51.98, H 3.84: found C 57 75. H 4 00. 5b (triphenyltelluronium4-methoxyphenyltellurolate): Yield 0.47 g (XO0/o) Elemental analysis of C,,H,,OTe,: cakd C 50.58. H 3.74; found C 50.48. H 3 75 7 (triphenyltelluronium 4-methylphenyl selenolate): Yield 0.35 g (67%) Elemental analysis of C,,H,,SeTe: calcd C 56.76. H 4.19. found C 56.03, H 3.96. ...
Pt-Ru nanoparticles supported on carbon nanofibers (CNF) were synthesized by the sodium borohydride reduction method, using different generation dendrimers (zero, one, two and three generations). After the synthesis process, these materials were submitted to a heat treatment at 350 °C, in order to clean the nanoparticle surface of organic residues. TEM characterization showed that the Pt-Ru nanoparticles size ranged between 1.9 and 5.5 nm. The use of dendrimers did not totally avoid the formation of aggregates, although monodisperse sizes were observed. The heat treatment produces the desired surface cleaning, although promoted the formation of agglomerates and crystalline Ru oxides. The study of the electrochemical activity towards the methanol oxidation displayed some clues about the influence of both the dendrimer generation and the presence of Ru oxides. Moreover, the apparent activation energy Eap for this reaction was determined. The results showed a beneficial effect of the heat treatment on the
atented Oct. 28, 1952 PURIFICATION .OF BOROHYDRIDES F ALKALI METALS Thomas R. P. Gibb, Jr., Marblehead, Mass as signor to .Metal ,Hydrides Incorporated, Beverly, Mass., a corporation of Massachusetts NoDrawing. Application November 14, 1949, Serial ,No. 127,239 4 Claims. 1 This invention relates to the preparation of sodium borohydride and borohydrides of other alkali metals and more especially to the purification of such borohydrides. Borohydrides of the alkali metals can be produced by reacting an alkyl borate with an alkali metal hydride. The principal products of the reaction are the borohydride of the alkali metal and the alkoxide of the alkali metal. vThus, if methyl borate isbrought in contact with sodium hydride while heated to a temperature of about 245 C. to 265 C. a mixture of sodiumborohydride and sodium methoxide is produced. Thereaction may be illustrated by the following equation: The sodium borohydride may be separated from the sodium methoxide by dissolving with ...
Haem a with denatured proteins in strongly alkaline solutions forms haemochromes whose α-absorption bands lie 15 to 20 mμ more towards shorter wavelengths than those of haemochromes with other nitrogenous ligands. It is found that this is due to the formation of Schiffs bases, the formyl side chain of haem a being condensed with amino groups of the protein. The same reaction is given by other haems and porphyrins with formyl side chains. The Schiffs bases are stable only at high pH and are dissociated at pH 7 to 8. Schiffs bases with methylamine are also obtained with high concentration of methylamine at high pH. These compounds are compared with alkaline indicator yellow (retinal-opsin) and retinylidene methylamine. ...
Glucose can react non-enzymatically with amino groups of, for example, proteins, to yield derivatives termed advanced glycation end products (AGE), which contribute to many chronic progressive diseases associated with microvascular complications. The study aimed to determine the effect of AGE-modified albumin on THP-1 cells and human monocyte-derived macrophages. Bovine serum albumin (BSA) or human serum albumin (HSA), modified by glucose-derived AGE, was prepared by incubation with glucose for differing periods of time. Alternatively, BSA was incubated with sodium cyanoborohydride and glyoxylic acid to produce N(epsilon)-(carboxymethyl)lysine-modified BSA (CML-BSA). Stimulation for 24h of THP-1 cells with BSA, incubated for 6-8 weeks with glucose, induced significant VEGF release. Human monocyte-derived macrophages stimulated with extensively glycated HSA also showed significant VEGF release, as well as upregulation of IL-8 production, incubation for 6h with extensively glycated HSA increased release
To a solution of Benzoic acid 3-[5(R)-(2-amino-propyl)-7-cyano-2, 3-dihydro-indol-l- yl]-propyl ester (XV) (3.5 g, 10 mmole) in Dimethyl sulphoxide (60 ml), charged Hydrogen peroxide (10% w/w) (11 ml). Then added 5 N sodium hydroxide solution (12.3 ml) and reaction mass was stirred for 2 hours. After completion of reaction water was added and extracted the product in ethyl acetate. Organic layer was washed with brine and dried over sodium sulphate. The solvent was evaporated below 40°C under reduced pressure and added methanol (25 ml). To this solution charged glacial acetic acid (0.25 g, 4mmole) and [2-(2, 2, 2-Trifluoro-ethoxy)-phenoxy]-acetaldehyde (VIII) (3 g, 0.0125 mole). Reaction mixture was stirred at 25-30°C for 1 hour. Then reacted with sodium cyanoborohydride (0.15 g, 2.8 mmoles) and heated at 40-45°C for 2 hours. After the completion of reaction solvent was distilled off below 40°C under reduced pressure and added water to the residue. Reaction mass was then acidified with ...
Dear Reader, I was reading Chemistry world recently and I saw an interesting paper. It was about how to reduce a ester while leaving an aldehyde alone. While everyone seems to love sodium borohydride it will normally reduce an aldehyde faster than it will reduce an ester. This is because an aldehyde is a more electrophilic group than an…
And another one - Is this a right way to think about Schiffs bases - if I like an aldehyde, and want something similar as a base (i.e - long lived), I should just add the same amount of methyl anthranilate (or indole..)?
1. Lignin-carbohydrate complexes isolated from leaf blade, leaf sheath and stem tissue of ryegrass by extraction with dimethyl sulphoxide were examined by fractionation procedures. Although the complexes are heterogeneous, heterogeneity is shown only in the ratio of the individual monosaccharide residues and not in the ratio of lignin to carbohydrate. 2. The molecular weight of the complexes is high (≥150000), but chemical modification by alkaline hydrolysis, borohydride reduction or lead tetra-acetate oxidation does not drastically decrease it. Low-molecular-weight fragments released by alkaline treatment were shown to contain acetic acid, ferulic acid and p-coumaric acid. 3. On the basis of the chemical stability of the complexes, it is postulated that at least three types of bonding may be present between lignin and carbohydrate, namely one cleaved on borohydride reduction, another cleaved by alkali and a linkage resistant to alkali. 4. The carbohydrate portion of the complexes is composed ...
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Boro Blinds Ltd are expert manufacturers and installers of vertical and roller blinds. We manufacture all products we sell from our factory in Stockton-on-Tees. We employ local people and source our fabrics and materials from the UK market. We offer our customers the very best range of products on the market coupled with a good honest service.. ...
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Reduction, in organic chemistry, means the addition of hydrogen to molecule or removal of electronegative atoms such as halogen or oxygen from the molecule.. Hydride, by itself, is not a good nucleophile because it is not polarizable. But sodium borohydride, NaBH4 function as a delivery agent of nucleophilic hydride anion. And the solvent function as the source of a proton. The solvent can be ethanol, methanol, or water.. In this medium, the reagent donates hydride to the carbonyl carbon with simultaneous protonation of the carbonyl oxygen by the solvent. The intermediate which is obtained by first transferring of the hydride ion can attack three more carbonyl substrates until all the hydride atoms of the original reagent have been used up. Thus one equivalent of borohydride is capable of reducing four equivalents of a ketone to a secondary alcohol.. ...
Boro and Sashiko Japanese mending (Boro is the Japanese art of mending, "literally translated as rags or scraps of cloth, the term boro is also used to describe clothes and household items which have been patched-up and repaired many times." Sashiko, literally translated to "little stabs", is a form of decorative reinforcement stitching, usually running stitch, for areas on clothing that get a lot of wear ...
Juanfe writes: Chrysler group announced a concept vehicle called the Natrium, powered by a sodium borohydride (NaBH4) engine developed by Millenium Cell. NaBH4 can be made from sodium borate -- basic borax, used in laundry detergent. MilleniumCell is a US Company that, not surprisingly, has made st...
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RATIONALE: Diagnostic procedures using boronophenylalanine-fructose complex (BPA-F) and/or sodium borocaptate (BSH) to detect the presence of boron in tumor cells may help determine whether patients who have thyroid cancer, head and neck cancer, or liver metastases may benefit from boron neutron capture therapy.. PURPOSE: This phase I trial is studying the side effects of giving BPA-F and/or BSH before surgery to detect boron uptake in tissues of patients with primary, metastatic, or recurrent thyroid cancer, head and neck cancer, or liver metastases from colorectal cancer. ...
RATIONALE: Diagnostic procedures using boronophenylalanine-fructose complex (BPA-F) and/or sodium borocaptate (BSH) to detect the presence of boron in tumor cells may help determine whether patients who have thyroid cancer, head and neck cancer, or liver metastases may benefit from boron neutron capture therapy.. PURPOSE: This phase I trial is studying the side effects of giving BPA-F and/or BSH before surgery to detect boron uptake in tissues of patients with primary, metastatic, or recurrent thyroid cancer, head and neck cancer, or liver metastases from colorectal cancer. ...
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Pectin was modified by oxidation with sodium periodate at molar ratios of 2.5, 5, 10, 15 and 20 mol% and reductive amination with tyramine and sodium cyanoborohydride afterwards. Concentration of tyramine groups within modified pectin ranged from 54.5 to 538 μmol/g of dry pectin while concentration of ionizable groups ranged from 3.0 to 4.0 mmol/g of dry polymer compared to 1.5 mmol/g before modification due to the introduction of amino group. All tyramine-pectins showed exceptional gelling properties and could form hydrogel both by cross-linking of carboxyl groups with calcium or by cross-linking phenol groups with peroxidase in the presence of hydrogen peroxide. These hydrogels were tested as carriers for soybean hull peroxidase (SHP) immobilization within microbeads formed in an emulsion based enzymatic polymerization reaction. SHP immobilized within tyramine-pectin microbeads had an increased thermal and organic solvent stability compared to the soluble enzyme. Immobilized SHP was more active in
Incorporating the latest and most reliable scientific research and techniques into an effective evidence based practice is the cornerstone of Twin Boro Physical Therapys success. Patients that come into our Egg Harbor office know that they are receiving the highest standard of care, because our physical therapists work one-on-one to develop an individualized treatment plan for each patient. Twin Boro Physical Therapy provides treatment for the wide variety of conditions that affect the musculoskeletal system, including:. ...
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Reductions with metal alkoxyaluminium hydrides are chemical reactions that involve either the net hydrogenation of an unsaturated compound or the replacement of a reducible functional group with hydrogen by metal alkoxyaluminium hydride reagents. Sodium borohydride and lithium aluminium hydride are commonly used for the reduction of organic compounds. These two reagents are on the extremes of reactivity-whereas lithium aluminium hydride reacts with nearly all reducible functional groups, sodium borohydride reacts with a much more limited range of functional groups. Diminished or enhanced reactivity may be realized by the replacement of one or more of the hydrogens in these reagents with alkoxy groups. Additionally, substitution of hydrogen for chiral alkoxy groups in these reagents enables asymmetric reductions. Although methods involving stoichiometric amounts of chiral metal hydrides have been supplanted in modern times by enantioselective catalytic reductions, they are of historical interest ...
Reduction of (RS)-N-tert-butanesulfinyl α-halo imines with NaBH4 in THF, in the presence of 10 equiv of MeOH, and subsequent cyclization with KOH afforded the corresponding (RS,S)-N-(tert-butylsulfinyl)aziridines in quantitative yields. On the contrary, its epimer, (RS,R)-N-(tert-butylsulfinyl)aziridine was synthesized in good yields and diastereoselectivity by switchover of the reducing agent from NaBH4 to LiBHEt3 ...
Global (North America, Europe and Asia-Pacific, South America, Middle East and Africa) Foundry Binder Market 2017 Forecast to 2022. "This report studies the Foundry Binders market, from angles of players, regions, product types and end industries, to analyze the status and the future. This report covered the Organic Binder and Inorganic Binder." Scope of the Report: This report focuses on the Foundry Binder in Global market, especially in North America, Europe and .... January 2018 , $4880 ,View Details>> ...
The report generally describes sodium triacetoxy borohydride, examines its uses, production methods, patents. Sodium triacetoxy borohydride market situation
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The 35-year-old federal law regulating tap water is so out of date that the water Americans drink can pose what scientists say are serious health risks - and still be legal. The New York Times analyzed the results of more than 19 million drinking water tests.
The 35-year-old federal law regulating tap water is so out of date that the water Americans drink can pose what scientists say are serious health risks - and still be legal. The New York Times analyzed the results of more than 19 million drinking water tests.
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If, in an imine molecule, the ligand on the nitrogen atom is an alkyl or aryl group, the imine is also called a Schiffs base.. eg:. ...
Apollo Hospitals, Kakinada has been formally accredited by NABH - making it the 11th hospital in the group to be accredited. The Hospital is now the first NABH accredited group hospital in the re-formed state of Andhra Pradesh. Ms. Sangita Reddy, Joint Managing Director, Apollo Hospitals Enterprise Limited, Dr. Hari Prasad (CEO- Central Region) & Mr. Karunakar (Vice President - HR) congratulated the team.  
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I remember him and Bob Mortimer on some TV programme, both at the Boro v. Palace game at AP in Lennies last weeks as manager, Hughes being a Palace fan for some reason. Palace won 1-0. At the end of the programme Mortimer said to the camera, "I know who our next managers going to be, its (bleeped out)". Not long after Robbo was announced ...
And why is that? Everyone pretty much knows that I was the one that requested that Jeff Hinermann open the GAA books after I was turned down to donate money to the Association.Everyone is so concerned about the supposed boro corruptionthat noone notices the real corruption. Unlike most of the people on here I speak it lke it is and Im not sitting behind a fake screen name talking trash on anyone. As for killing my business, I have yet to get an order from the Boro building or anyone from the GAA, so if you cant accept my opinion then I dont know what to tell you. Open your eyes and look around ...
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KZn(BH4)Cl2, synthesized for the first time, contains a heteroleptic complex anion [Zn(BH4)Cl2]-, extending the structural diversity of metal borohydrides. In-situ synchrotron powder diffraction, NMR and Raman spectroscopy were used to characterize KZn(BH4)Cl2 and to evaluate the mechanism, for its thermal decomposition. The title compound decomposes at a significantly lower temperature than KBH4 and may be used for inspiration for the design of novel hydrogen storage materials. Combining different ligands in modified metal borohydrides is proposed as a way to adjust stability with respect to hydrogen, desorption. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA. ...
The efficacy of a liposomal formulation for intracerebral delivery of borocaptate (BSH) to brain tumor cells has been investigated using cell culture to study BSH uptake and persistence and using tumor-bearing rats to determine BSH distribution in the brain. During a 16-hr incubation, cellular uptake of BSH solution or BSH liposomal formulation was similar. However, the cellular persistence of BSH greatly increased when BSH was present in liposome. The differences in cellular persistence for BSH solution and BSH-loaded liposomes were significant both in 12-hr and 24-hr incubation experiments (p | 0.05 and p | 0.01, respectively). For the studies involving tumor-bearing rats, BSH level in tumor tissue was significantly higher than that in normal brain tissue at 2 hr and 6 hr after intracerebral injection of BSH-loaded liposomes (p | 0.01). Our study indicated that the liposomal formulation enhanced cellular persistence of BSH in tumor cells and therefore favored the boron accumulation in the cells. With
Light weight and cheap electrolytes with fast multi-valent ion conductivity can pave the way for future high-energy density solid-state batteries, beyond the lithium-ion battery. Here we present the mechanism of Mg-ion conductivity of ammine magnesium borohydrides, Mg(BH4)2·xNH3 (x = 1, 2, 3, 6). Density fun
This unit describes release of oligosaccharides that are attached to polypeptides through an N-acetylgalactosamine (GalNAc) linkage to the hydroxyl groups of serine or threonine. The b-elimination procedures described here can be used to recover the oligosaccharide chains (also called glycans) and/or identify the serine or threonine residues involved in the linkage. A b-elimination method employing sodium borohydride (NaBH4) and alkaline conditions is described, and an alternative method is also presented in which only alkaline conditions are used without a reducing agent. Another alternative protocol uses sodium sulfite. ...
Synthetic utilities of vicinal diols are well known and their preparations from reduction of a-diketones and acyloins have attracted a great deal of attention. In this context, we decided to examine solid state reduction of a-diketones and acyloins with NaBH4 in the presence of wet SiO2. Reduction of a-diketones to their vicinal diols took place by 1.5 molar equivalents of NaBH4 in the presence of wet SiO2 (30% m/m) under solvent free condition at 75-80 ºC. The product diols were obtained in excellent yields and all attempts to reduce a-diketones into acyloins were unsatisfactory by this reducing system (Table 7). Reduction of acyloins to vicinal diols was also achieved successfully by NaBH4/wet SiO2 (30% m/m) in solid state. Using one molar equivalent of NaBH4 at 75-80 ºC was the requirement for the excellent yields of the corresponding products (Table 7). No assumptions on the simple diastereoselectivity (syn or anti) of the products were made.. The influence of water in wet SiO2 for the ...
Sodium triacetoxyborohydride has emerged as one of the reagents used most frequently for carrying out reductive amination of carbonyl compounds, a reaction that is also known as reductive alkylation of amines. A disadvantage of sodium triacetoxyborohydride is its poor solubility, and that product isolation requires an aqueous quench followed by liquid-liquid extraction and column chromatography.. Biotage® MP-Triacetoxyborohydride was developed to perform in a manner similar to that of sodium triacetoxyborohydride, while simplifying reagent handling and product purification. Moreover, for many of these reactions, a scavenger resin may be added for one-pot purification of the product.. ...
Immunocytochemistry. Eleven naive adult male Sprague Dawley rats were anesthetized deeply and perfused transcardially with 10 ml of heparin saline (1000 U/ml), followed by fixative. For 10 rats, the fixative consisted of 50 ml of 3.75% acrolein and 2% paraformaldehyde in 0.1 m phosphate buffer, pH 7.4 (PB), followed by 250 ml of 2% paraformaldehyde. To determine whether the degree of DAT immunostaining was dependent on the fixative that was used, we perfused the remaining animal with 500 ml of 4% paraformaldehyde with 0.2% glutaraldehyde. The brains were removed, post-fixed in the final fixative for 30 min, and sectioned at 50 μm on a vibratome. To improve antigenicity and reduce nonspecific immunolabeling, we subsequently treated the sections for 30 min with 1% sodium borohydride (Leranth and Pickel, 1989) and rinsed them in PB. To reduce further the nonspecific labeling before incubation in primary antibody, we treated sections for 30 min in a blocking solution consisting of 1% bovine serum ...
SYNTHESIS, IN VITRO ANTIBACTERIAL, TOXICITY AND MOLECULAR DOCKING ANTICANCER ACTIVITY OF NOVEL N-[(2-CHLOROQUINOLIN-3-YL) METHYLIDENE]-2-ANILINE SCHIFFS BASES
Appenzeller, S., Balling, R., Barisic, N., Baulac, S., Caglayan, H., Craiu, D., De Jonghe, P., Depienne, C., Dimova, P., Djémié, T., Gormley, P., Guerrini, R., Helbig, I., Hjalgrim, H., Hoffman-Zacharska, D., Jähn, J., Klein, K. M., Koeleman, B., Komarek, V., Krause, R. & 111 others, Kuhlenbäumer, G., Leguern, E., Lehesjoki, A. E., Lemke, J. R., Lerche, H., Linnankivi, T., Marini, C., May, P., Møller, R. S., Muhle, H., Pal, D., Palotie, A., Pendziwiat, M., Robbiano, A., Roelens, F., Rosenow, F., Selmer, K., Serratosa, J. M., Sisodiya, S., Stephani, U., Sterbova, K., Striano, P., Suls, A., Talvik, T., von Spiczak, S., Weber, Y., Weckhuysen, S., Zara, F., Abou-Khalil, B., Alldredge, B. K., Andermann, E., Andermann, F., Amrom, D., Bautista, J. F., Berkovic, S. F., Bluvstein, J., Boro, A., Cascino, G., Consalvo, D., Crumrine, P., Devinsky, O., Dlugos, D., Epstein, M. P., Fiol, M., Fountain, N. B., French, J., Friedman, D., Geller, E. B., Glauser, T., Glynn, S., Haas, K., Haut, S. R., Hayward, ...
A facile and convenient synthesis of some novel hydrazones, schiffs base and pyrazoles from thieno[2,3-b]thiophene derivatives 1 have been achieved in high yields assisted by microwave and classical methods. The structures of all the title compounds have been elucidated by elemental analysis, IR, MS, 1H-NMR and 13C-NMR. Generally, these findings represent a new class of sulfur and nitrogen moieties that should also be of interest as new materials.
In this paper, we investigate the effect of heterogeneous boron concentration and coolant density distribution on nodal macroscopic cross sections, which could potentially arise in an Anticipated Transient Without Control rods of a boiling water reactor. All calculations are made with the 2-D transport code PHOENIX4. Full core simulators, such as POLCA7, often have simple models for handling such heterogeneities with the basic requirement that conservative results are obtained simulating such core conditions. We have found that this is not always the case and that the errors can potentially be quite high.
Harvesting of the 2017 almost entirely irrigated "boro" paddy crop, accounting for some 55 percent of annual output, will be completed in June. Adequate irrigation water supplies and favourable weather conditions benefitted "boro" paddy development this season, although excess precipitation in late March and early April triggered localized flooding over northeastern producing areas. The inundations occurred just before harvest time, impacting crops in Sylhet, Dhaka and Mymensingh divisions in particular.. Planting of the minor "aus" paddy crop, which accounts for 7 percent of annual output, is currently ongoing and will be followed by the June start of "aman" plantings. Assuming normal growing conditions prevail, early prospects for these crops are favourable, on anticipation that attractive paddy prices will stimulate increases in plantings. As a result and pending assessments of "boro" damages incurred, FAO tentatively forecasts aggregate 2017 paddy production at 53.1 million tonnes, 1 percent ...
1993) have been devel- oped as generic reagents for introducing fluorine-18 into N-isopropyl groups by the reductive alkylation augmentin sf syrup direct alkylation of secondary amines, FAF488 appears to be augmetnin distributed and shows focally reduced intensity.
N-Phenethyl-4-piperidinone (NPP) is a derivative of 4-piperidinone with the molecular formula C13H17NO. 4-Piperidinone is used as an intermediate in the manufacture of chemicals and pharmaceutical drugs such as fentanyl. Because of its possible use in the illicit manufacture of fentanyl, NPP was placed onto the list of controlled chemicals in the USA in 2007, and possession and sales of this compound are now restricted. N-Phenethyl-4-piperidinone can be prepared from 4-piperidinone and phenethyl bromide in biphasic conditions with a variety of phase transfer catalysts.[citation needed] N-Phenethyl-4-piperidinone is useful in the synthesis of pharmaceuticals, primarily fentanyl and its analogs. Paul Janssen (founder of Janssen Pharmaceutica) first synthesized fentanyl in 1960 from NPP. Janssens synthesis involved reacting N-Phenethyl-4-piperidinone with aniline, and then reducing the imine product with sodium borohydride to 4-anilino-N-phenethylpiperidine (ANPP). This product is reacted with ...
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The abuses of authority we learned of today are alarming and must be addressed," said Schiff. "It was most disturbing to learn that there were many cases in which federal agents demanded records and made assurances that grand jury subpoenas were forthcoming - when none was later provided or even contemplated. I commend House Judiciary Committee Chairman Conyers for announcing his intention to immediately schedule hearings on this issue so that Congress can probe these abuses and determine what legislative response is necessary ...
I was accompanied by Dan, Edinburgh resident extraordinaire and fellow contributor to intrepid Boro fanzine Fly Me To The Moon. Despite the fact wed only met once previously in a face-to-face/tête-à-tête manner, he was kind enough to agree to let me linger overnight on the favourably long sofa in his living room. It was long enough that I didnt need to dangle my handsome calves over an arm rest, and could actually lie straight, as if in a coffin. But one you wake up again in. Great hospitality from the host (rather than hospitalisation, which befell the host for my last trip to Edinburgh). I found out on Friday night that Foz from down this way was also up that way for the weekend, and we met up with him and his decidedly Scottish uni friend, Ewan, inside the ground. Very nice chap wearing a good jumper. Over the course of the day and night, many public houses were frequented and many pints of ale and bitter consumed. I wont bore you with the details - except that it was a delightful ...
hello: i am trying to find antibodies to galctose oxidase from dactylium species. couldnt find any in a few catalogs i looked or in a few resources at the antibody resource page. any leads? thanx, bip (dalmiabk at phibred.com) Bipin K. Dalmia, Ph.D. Protein Expression and Purification Pioneer Hi-Bred International, Inc. Johnston, Iowa 50131 dalmiabk at phibred.com ...
Silver has broken hourly support at 14.94 (05/11/2015 low). The potential medium-term base formation and the short-term challenge to range support favours a bearish bias. The resistance at 15.45 (declining channel) has thus far held.
for borohydride though... we got a funny UV spectrum. I will post both pictures and I need people to help me explain the difference. (since im not too familiar with UV spectra ...
Prof. Sesha S. Srinivasan of Tuskegee University kindly suggested that we offer Magnesium Borohydride (Aldrich Prod. No. 715247) as a material for alternative energy applications.1 This complex metal hydride, produced by Aldrich Materials Science R&D, is a base-material for advanced energy storage systems with potential for fulfilling the United States Department of Energys hydrogen storage goals.2 Magnesium borohydride crystallizes in a hexagonal phase that is stable at room temperature. At 185 °C, the material converts to an orthorhombic phase, which persists and is stable upon cooling back to room temperature. Both phases consist of complex networks of cornersharing tetrahedra including a central Mg atom and four BH4 units.3. back to top. ...
A catalytic enantioselective 1,2-reduction of enones with potassium borohydride is catalyzed by a chiral N,N-dioxide-Sc(III) complex catalyst under mild reaction conditions. A number of optically active allylic alcohols were obtained in very good enantioselectivities with nearly quantitative yields ...
2. The palladium on carbon catalyst was prepared by the following method, developed by Walter H. Hartung, School of Pharmacy, University of Maryland, Baltimore. Ten milliliters of a commercial palladium chloride solution containing 0.1 g. of palladium and approximately 0.05 g. of hydrogen chloride per milliliter (obtained from the J. Bishop Company, Malvern, Pennsylvania) is added to a solution of 27 g. of sodium acetate trihydrate in 100 ml. of water. Norit (9 g.) is added, and the mixture is hydrogenated until absorption ceases. The catalyst (10 g.) is filtered on a Büchner funnel, washed with water, dried by drawing air through the funnel for about 30 minutes, and stored in a desiccator over calcium chloride. The palladium catalysts, prepared as described elsewhere in this volume, are presumably also satisfactory for the reductive alkylation described above (p. 685) ...
Block the formation of inter- and intramolecular disulfide bonds in protein samples by reductive alkylation. Improve isoelectric focusing (IEF) results.
Density functional theory based screening of ternary alkali-transition metal borohydrides: A computational material design project. / Hummelshøj, Jens Strabo; Landis, David; Voss, Johannes; Jiang, Tao; Tekin, Adem; Bork, Nicolai Christian; Dulak, Marcin; Mortensen, Jens Jørgen; Adamska, L.; Andersin, J.; Baran, J.D.; Barmparis, G.D.; Bell, F.; Benzanilla, A.L.; Bjork, J,; Björketun, Mårten; Bleken, F.; Buchter, F.; Bürkle, M.; Burton, P.D.; Buus, Bjarke Brink; Calborean, A.; Casolo, S.; Chandler, B.; Chi, D.H.; Czekaj, I.; Datta, S.; Datye, A.; DeLaRiva, A.; Despoja, V.; Dobrin, Sergey; Engelund, Mads; Ferrighi, L; Frondelius, P.; Fu, Q.; Fuentes, A.; Fürst, Joachim Alexander; Garcia-Fuente, A.; Gavnholt, Jeppe; Goeke, R.; Gudmundsdottir, S.; Hammond, K.D.; Hansen, Heine Anton; Hibbitts, D.; Howalt, Jakob Geelmuyden; Hruby, S. L.; Huth, A.; Isaeva, L.; Jelic, J.; Jensen, I.J.T.; Junior, E.H.; Kacprzak, K.A.; Kelkkanen, Kari André; Kelsey, D.; Kesanakurthi, D.S.; Kleis, Jesper; Klüpfel, ...
Another issue that generated fear over the fate of the property is the conflict of interest between the Environmental Commission and the Boros leadership. The chair of the Environmental Commission, Harry Allen, is none other than the husband of the mayor. He has refused to recuse himself on the matter, despite his wifes documented position in favor of building on the property. In accordance with this, the department has objected to repeated attempts from concerned citizens to do their jobs and conduct environmental studies on the property. Fearing the possibility of finding something that would spur development from the area, the commission has elected to ignore this issue entirely. The mayor has gone on record claiming that the boro was denied a grant and therefore cannot do any studies. This is wildly untrue though, as the state environmental commission provides guidelines on how volunteers can conduct the studies themselves. No grant money needed ...
Fibroids Treatment Brooklyn NY - Boro Park OB/GYN offers fibroids treatment. Our practice serves Brooklyn, NYC, and surrounding areas.
Specs: Made with quality boro glass Pointed dabber tip Colorful sand filled Assorted colors (Note: color may vary and will ship based on availability) These Terpene Syringe Dabbers is a syringe shaped dab wand filled with colorful sand. Made with borosilicate glass and features a pointed tip. Use with live resin, waxes
Specs: Made with quality boro glass Pointed dabber tip Colorful sand filled Assorted colors (Note: color may vary and will ship based on availability) These Terpene Syringe Dabbers is a syringe shaped dab wand filled with colorful sand. Made with borosilicate glass and features a pointed tip. Use with live resin, waxes
20 November 2017 - RaySearch and Sumitomo Heavy Industries, Ltd. (Sumitomo), based in Tokyo, Japan, have entered into an agreement regarding treatment planning for boron neutron capture therapy (BNCT) - a unique type of radiation therapy that targets cancer at the cellular level. The agreement extends the existing cooperation between Sumitomo and RaySearch on proton therapy. Sumitomo has developed the worlds first accelerator-based clinical BNCT system and is conducting clinical trials regarding recurrent head-and-neck and brain cancers in Japan. Treatment planning is an essential aspect of BNCT, and Sumitomo selected RayStation because of its advanced capabilities and usability. Under the agreement, RayStations functionality will be extended to support BNCT planning requirements*. BNCT will be an additional treatment modality in RayStation, alongside the existing options for photon, electron, proton, and carbon ion therapy. Users of BNCT will have access to the full range of advanced ...
Boron Neutron Capture Therapy (BNCT) is an experimental radiation therapy technique which is based on the principle of irradiating boron atoms with neut
A new target concept termed Discs Incorporating Sector Configured Orbiting Sources (DISCOS), is proposed for spallation applications, including BNCT (Boron Neutron Capture Therapy). In the BNCT application a proton beam impacts a sequence of ultra thin lithium DISCOS targets to generate neutrons by the {sup 7}Li(p,n){sup 7}Be reaction. The proton beam loses only a few keV of its {approximately}MeV energy as it passes through a given target, and is re-accelerated to its initial energy, by a DC electric field between the targets.
RATIONALE: Boron neutron capture therapy may selectively kill tumor cells without harming normal tissue. PURPOSE: Phase I trial to study the effe
The present invention relates to immunoconjugates for use in neutron capture therapy, in particular Boron neutron capture therapy, for killing target cells such as tumours. The immunoconjugate of the
Summary of Facts and Submissions. I. European patent application No. 00 936 887.9 (publication No. WO 00/76557) was refused by a decision of the examining division of 29 August 2005 on the basis of Article 97 EPC on the grounds of lack of inventive step under Article 56 EPC.. II. The following documents were inter alia cited during the proceedings before the examining division and the board of appeal:. (1) J.-L.A. Shih and R.M. Brugger: Neutron induced brachytherapy: A combination of neutron capture therapy and brachytherapy Medical Physics, vol. 19, no. 2, March/April 1992, pages 369-375. (2) EP-A-0 857 470. (3) US-A-5 840 009. (4) US-A-5 947 889. (4a) DE-A-196 00 669. III. The decision was based on claims 1-19 of the main request filed with letter dated 15 January 2002 (entry into the European phase).. Independent claims 1 of the main request before the examining division read as follows:. 1. A stent for neutron capture therapy, the stent comprising a body portion fabricated from a material ...
Specialized treatment planning software systems are generally required for neutron capture therapy (NCT) research and clinical applications. The standard simplifying approximations that work well for
Boron neutron capture therapy, or BNCT, is a two-part therapy that enhances the effect of radiation on cancer cells while minimizing the effect on nearby healthy cells.. Inadvertant damage to non-cancerous tissue is a major side effect of conventional radiation therapies, especially in the treatment of brain tumors. Conventional radiation therapy also requires several bouts of treatment, an inconvenience for many patients.. BNCT avoids these pitfalls by using radiation from BNLs medical reactor and a drug containing the element boron. Called BPA for boronophenylalanine, the drug is injected into the patient and travels through the bloodstream, concentrating preferentially in tumor tissue.. By itself BPA is harmless, but when exposed to a beam of neutrons from the reactor, the boron atoms capture neutrons, creating secondary effects that kill cells in the immediate vicinity.. Clinical trials of BNCT have been under way at BNL since 1994. Other locations in the U.S. are conducting related ...
For years, radiotherapy has been an essential mode of noninvasive cancer therapy and advancements have led to life saving treatments for patients. In contrast to other conventional radiotherapies, boron neutron capture therapy (BNCT) is unique in its selective destruction of cancerous cells. BNCT is based on nuclear capture and fission reactions when nonradioactive 10B is irradiated with neutrons to yield excited 11B* which decays into high energy alpha particles and 7Li nuclei. Boron is preferentially accumulated into tumour cells though non-toxic carriers and the short length of the generated neutron beams (5-9 µm) destroys nearby cells leaving the surrounding healthy tissue intact.. The development of carrier systems that deliver sufficient amounts of boron to carry out effective destruction of all vicinal tumour cells has been a significant area of BNCT research for many years. A recent breakthrough made by Professors Atsushi Ikeda of Hiroshima University, Takeshi Nagasaki of Osaka City ...
Boron neutron capture therapy, a local radiation therapy, may give cancer patients tumour-free time and relief from symptoms when other known and effective treatment methods have been exhausted.
TY - GEN. T1 - Ammonium borohydride. T2 - Solid hydrogen storage material with highest gravimetric hydrogen content. AU - Karkamkar, Abhi. AU - Heldebrant, David J.. AU - Linehan, John. AU - Autrey, Tom. PY - 2009. Y1 - 2009. N2 - Various options for hydrogen storage are being studied ranging gases (hydrogen), liquids (e.g., methanol) to solids (e.g., lithium borohydride, boranes and amides). However, no single material today meets all the required technical targets. Here we report the synthesis, structure and hydrogen desorption properties of a unique hydrogen storage material, i.e., one that stores hydrogen on both the cation and anion, ammonium borohydride. Further we show the compound releases greater than 20 wt% hydrogen in three steps at temperatures less than 180 °C and provide evidence that NH4BH4 crystallizes at room temperature and standard pressure in a rock-salt structure. The experimental lattice parameters provide an estimate of the volumetric density, ca. 154 g Hydrogen/liter of ...
0030] When the FDA-approved 10B-BPA is used as a boron drug in the BNCT for treating tumors, the ratio of boron concentrations accumulated in the tumor and the adjacent to normal organs must be evaluated by using 18F-BPA Positron Emission Tomography (PET) first. In other words, if a boron drug that is similar to 10B-BPA (high T/N ratio) is developed for use in the BNCT for treating liver cancer, this step of labeling the boron drug with radioisotope (such as 18F) and evaluating the boron drug T/N ratio by PET cannot be avoided. But in the present invention, boric acid is used as a boron drug in the BNCT for treating liver cancer, which does not require the step of labeling the boron drug with radioisotope or evaluating the boron drug T/N ratio by PET. This is due to the fact that boric acid does not result in specific accumulation in the soft tissues of a living creature, so the boron concentrations in a patients blood and in the liver tumor are approximately equal. Consequently, it is not ...
A study was conducted to screen out the low-temperature tolerant Boro rice seedlings from November 2012 to January 2013 for facing the upcoming rice production challenge in Northwest Bangladesh. The experimental time was characterized by a prevailing low environmental temperature of below 15°C. Five rice cultivars (V1: BR-2; V2: BR-16; V3: Pariza; V4: Minicate; V5: BRRI dhan 50) were selected for the study. The leaf proline, chlorophyll content and total carotenoid content were investigated. The V2 (BR-16) seedling synthesized the higher leaf proline (1.228 g·g-1) at a low temperature than those of other tested cultivars. Again, the highest amount of chlorophyll-a (3.957 g·g-1), chlorophyll-b (2.118 g·g-1), chlorophyll-a/b ratio (3.6754 mg·g-1) and total chlorophyll (5.051 g·g-1) was measured in V2 (BR-16). The maximum total carotenoid (1.213 g·g-1) was also observed in V2. In this experiment, the V2 (BR-16) showed comparatively better potentiality to survive at low temperatures (below 15°C)
Abstract: A binary metallic catalyst (PtSn/C) and a ternary metallic catalyst (PtSnCo/C) with a metal mass fraction of 20% were prepared by borohydride reduction and subsequent hydrothermal treatment in a glycol liquid phase. The structure and composition of the as-prepared electrocatalysts were characterized by X-ray diffraction (XRD) and energy-dispersive spectrometry (EDS). Their activity and stability for the catalysis of methanol oxidation were evaluated by anodic linear sweep voltammetry (LSV), cyclic voltammetry (CV), and the anodic stripping of a pre-adsorbed CO monolayer. We found that the PtSnCo/C catalyst gave the best catalytic activity for the methanol oxidation of all the catalysts including the commercial JM-PtRu/C catalyst. After 100 cycles, the peak current of methanol oxidation for the PtSn/C catalyst rapidly decreased to 11% of its initial peak current but PtSnCo/C decreased to only 50%. This result suggests that the PtSnCo/C catalyst has better chemical stability for the ...

*Silver nanoparticle

Reduction via sodium borohydride[edit]. The synthesis of silver nanoparticles by sodium borohydride (NaBH4) reduction occurs by ... "Influence of Oxygen on the Process of Formation of Silver Nanoparticles during Citrate/borohydride Synthesis of Silver Sols." ... The benefit of using sodium borohydride is increased monodispersity of the final particle population. The reason for the ... reduction via sodium borohydride,[6] the silver mirror reaction,[7] the polyol process,[8] seed-mediated growth,[9] and light- ...

*Hydride

sodium borohydride: selective specialty reducing agent, hydrogen storage in fuel cells. *sodium hydride: a powerful base used ... Hydrides such as sodium borohydride, lithium aluminium hydride, diisobutylaluminium hydride (DIBAL) and super hydride, are ... Particularly common are sodium borohydride (NaBH4) and lithium aluminium hydride and hindered reagents such as DIBAL. ...

*List of inorganic compounds

Lithium borohydride - LiBH4. *Lithium carbonate (Lithium salt) - Li2CO3 ...

*Halostachine

... with sodium borohydride. Chemically, N-methylphenyethanolamine is an aromatic compound, an amine, and an alcohol. The amino- ... and the product finally converted to racemic N-methylphenylethanolamine by means of sodium borohydride in ethanol. An efficient ...

*Fuel cell

Direct borohydride fuel cell Aqueous alkaline solution 70 Commercial Alkaline fuel cell Aqueous alkaline solution 10 - 200 kW ...

*Methyldiborane

If the borohydride is sodium borohydride, then methane is a side product. If the metal is lithium then no methane is produced. ... Schlesinger, H. I.; Brown, Herbert C (September 1943). "The Borohydrides of Gallium". Journal of the American Chemical Society ... When trimethylgallium reacts with diborane at -45°, methyldiborane is produced along with dimethylgallium borohydride. 2(CH3) ... or reacting a metal borohydride with trimethylborane in the presence of hydrogen chloride, aluminium chloride or boron ...

*Reducing agent

Sodium borohydride (NaBH4). *Compounds containing the Fe2+ ion, such as iron(II) sulfate ...

*R)-2-Methyl-CBS-oxazaborolidine

"Asymmetric synthesis using chirally modified borohydrides. Part 3. Enantioselective reduction of ketones and oxime ethers with ...

*Willard Gibbs Award

... for the discovery of metal borohydrides; and the elaboration of practical procedures for their preparation; for the discovery ...

*Prolinol

"Asymmetric synthesis using chirally modified borohydrides. Part 2. Enantioselective reduction of ketones with polymeric (S)- ...

*Disulfide

In organic synthesis, hydride agents are typically employed for scission of disulfides, such as sodium borohydride. More ...

*Rodopsina, a enciclopedia libre

Bownds, D; Wald G (1965). "Reaction of the Rhodopsin Chromophore with Sodium Borohydride". Nature (en inglés) 205: 254-257. doi ...

*Hermann Irving Schlesinger

He and Herbert C. Brown discovered sodium borohydride in 1940 and both were involved in further development of borohydride ... "New developments in the chemistry of diborane and the borohydrides. General summary". Journal of the American Chemical Society ...

*Tetramethylammonium

"Preparation of quaternary ammonium borohydrides from sodium and lithium borohydrides". J. Am. Chem. Soc. 74: 2346-2348. doi: ... tetramethylammonium borohydride has been made from tetramethylammonium hydroxide as shown: Me4N+[OH]− + Na+[BH4]− → Me4N+[BH4 ...

*Quinoline

doi:10.1016/S0964-8305(96)00032-7. GRIBBLE, Gordon W.; HEALD, Peter W. (1975). "Reactions of Sodium Borohydride in Acidic Media ... The reduction of quinoline with sodium borohydride in the presence of acetic acid is known to produce Kairoline A. (C.f. ...

*Ester

The related reagent sodium borohydride is slow in this reaction. DIBAH reduces esters to aldehydes.[18] ...

*Enantioselective reduction of ketones

4) Chirally modified borohydrides are also useful for enantioselective ketone reductions. Economical ligands derived from amino ... Stoichiometric reducing agents to accomplish this task include lithium aluminium hydride, sodium borohydride, alkoxy ... borohydrides, alkoxy aluminium hydrides, and boranes. Initial efforts toward enantioselective ketone reductions focused on the ... acids have been used to modify borohydrides, affording highly selective reducing agents. (5) Chiral alkylborohydrides are ...

*Rhodopsin

Bownds D, Wald G (Jan 1965). "Reaction of the rhodopsin chromophore with sodium borohydride". Nature. 205: 254-7. doi:10.1038/ ...

*Danishefsky Taxol total synthesis

Subsequent reduction using sodium borohydride produced alcohol 51 . Reaction of this alcohol with the Ojima lactam 52 and a ... Reduction of this diketone with sodium borohydride provided unsaturated ketoalcohol 2, which was protected as an acetate. ...

*Germane

... potassium borohydride, lithium borohydride, lithium aluminium hydride, sodium aluminium hydride. The reaction with borohydrides ... A typical synthesis involved the reaction of Na2GeO3 with sodium borohydride.[5] ... with hydride reagents such as sodium borohydride, ...

*MDMA

Reductive aminations of carbonyl compounds with borohydride and borane reducing agents. Baxter, Ellen W.; Reitz, Allen B. ...

*Bleach

While most bleaches are oxidizing agents, some are reducing agents such as sodium dithionite and sodium borohydride. ...

*Sodium triacetoxyborohydride

Like other borohydrides, it is used as a reducing agent in organic synthesis. This colourless salt is prepared by protonolysis ... sodium triacetoxyborohydride is a milder reducing agent than sodium borohydride or even sodium cyanoborohydride. Furthermore, ... of sodium borohydride with acetic acid: NaBH4 + 3 HO2CCH3 → NaBH(O2CCH3)3 + 3 H2 Owing to the steric and electronic effects of ...

*Oxymercuration reaction

Bordwell, Frederick G.; Douglass, Miriam L. "Reduction of Alkylmercuric Hydroxides by Sodium Borohydride.". Journal of the ... the mercury adduct product created by the oxymercuration reaction is almost always treated with sodium borohydride (NaBH4) in ...

*Sodium cyanoborohydride

Another route entails treating sodium borohydride with mercury(II) cyanide. The commercial samples can be purified but the ... doi:10.1002/047084289X.rs059.pub2 Ellen W. Baxter, Allen B. Reitz Reductive Aminations of Carbonyl Compounds with Borohydride ... as found in sodium borohydride. As a mild reducing agent, it is especially used to convert imines to amines. It is especially ...

*Leucopelargonidin

... aromadendrin by sodium borohydride reduction. Dihydrokaempferol 4-reductase uses cis-3,4-leucopelargonidin and NADP+ to produce ...

Vertellus Acquires Dows Sodium Borohydride BusinessVertellus Acquires Dow's Sodium Borohydride Business

Sodium borohydride is predominantly used as a critical synthesis and process aid in the production of a wide variety of active ... The SBH Business is the leading manufacturer of sodium borohydride used in the synthesis of fine chemicals such as ... has signed a definitive agreement to acquire the Sodium Borohydride ("SBH") business, including associated assets, from The Dow ...
more infohttp://www.prweb.com/releases/2014/12/prweb12374816.htm

Borohydride | Definition of Borohydride by Merriam-WebsterBorohydride | Definition of Borohydride by Merriam-Webster

Borohydride definition is - the anion BH4- of boron and hydrogen that is used especially as a reducing agent and as a source of ... hydrogen atoms; also : any of various compounds (as of metals) containing the borohydride anion. ... Comments on borohydride. What made you want to look up borohydride? Please tell us where you read or heard it (including the ... Post the Definition of borohydride to Facebook Share the Definition of borohydride on Twitter ...
more infohttps://www.merriam-webster.com/dictionary/borohydride

Patent US2615788 - Purification of borohydrides of the alkali metals - Google PatentsPatent US2615788 - Purification of borohydrides of the alkali metals - Google Patents

Aqueous borohydride compositions. US20050178048 *. Mar 10, 2005. Aug 18, 2005. Lumsden Charles A.. Aqueous borohydride ... It has been found that the impurities present in an alkali metal borohydride, such as sodium borohydride produced by reacting ... This invention relates to the preparation of sodium borohydride and borohydrides of other alkali metals and more especially to ... metal borohydride ,in accordance with thepresent} invention. .It isknown thatan alkali metal borohydride is formed together ...
more infohttp://www.google.com/patents/US2615788?dq=6,123,819

Recommendations on how to choose sodium borohydride | Linux JournalRecommendations on how to choose sodium borohydride | Linux Journal

Sodium borohydride is a element that is a normal reducing agent. It is an organic element that has a good number of diverse ... As a typical rule, folks will not come into contact with sodium borohydride on a day-to-day basis as it is dangerous and risky ... Recommendations on how to choose sodium borohydride. Recommendations on how to choose sodium borohydride http://www. ...
more infohttp://www.linuxjournal.com/node/1095942

Tetra-n-butylammonium borohydride semicla... & related info | MendeleyTetra-n-butylammonium borohydride semicla... & related info | Mendeley

Journal of Physical Chemistry A. In this study, we demonstrate that tetra-n-butylammonium borohydride [(n-C4H9)4NBH4] can be ... Tetra-n-butylammonium borohydride semiclathrate: A hybrid material for hydrogen storage. *Shin K ... In this study, we demonstrate that tetra-n-butylammonium borohydride [(n-C4H9)4NBH4] can be used to form a hybrid hydrogen ... The decomposition temperature of tetra-n-butylammonium borohydride semiclathrate was measured at 5.7 °C, which is higher than ...
more infohttps://www.mendeley.com/research-papers/tetranbutylammonium-borohydride-semiclathrate-hybrid-material-hydrogen-storage/

Sodium borohydride powder, ≥98.0% | Sigma-AldrichSodium borohydride powder, ≥98.0% | Sigma-Aldrich

Sodium borohydride powder, ,=98.0%; CAS No.: 16940-66-2; Synonyms: Vertellus; Sodium tetrahydridoborate; Linear Formula: NaBH4 ... Sodium borohydride (NaBH4) is the most commonly available borohydride, synthesized by reacting methylborate with sodium hydride ... Alternative Energy, Borohydrides, Boron Hydrides, Chemical Reagents, Chemical Synthesis, Development Quantities for Research, ... Metal Borohydrides as Hydrogen Storage Materials To meet current DOE targets outlined in the article by S. Satyapal et al. in ...
more infohttps://www.sigmaaldrich.com/catalog/product/aldrich/452882?lang=en®ion=US

Borohydride - WikipediaBorohydride - Wikipedia

The most important borohydrides are lithium borohydride and sodium borohydride, but other salts are well known (see Table). ... Borohydride refers to the anion BH4− and its salts. Borohydride is also the term used for compounds containing BH4−nXn−, for ... Borohydrides can serve as ligands for many metals, and there is a large coordination chemistry of the borohydride ion. In most ... Sodium borohydride is the borohydride that is produced on the largest scale industrially, estimated at 5000 tons/y in 2002. The ...
more infohttps://en.wikipedia.org/wiki/Borohydride

Aluminium borohydride - WikipediaAluminium borohydride - Wikipedia

... aluminium borohydride is a covalent compound. Aluminium borohydride is formed by the reaction between sodium borohydride with ... Aluminium borohydride, also known as aluminium tetrahydroborate, (in American English, aluminum borohydride and aluminum ... "First-principles study on thermodynamical stability of metal borohydrides: Aluminum borohydride Al(BH4)3". J. Alloys Compd. 446 ... ISBN 0-8493-0594-2. J. Kollonitsch & O. Fuchs (1955). "Preparation of Aluminium Borohydride and its Applications in Organic ...
more infohttps://en.wikipedia.org/wiki/Aluminium_borohydride

Global Sodium Borohydride Market Research Report 2016 -... - Chemical Industry NewsGlobal Sodium Borohydride Market Research Report 2016 -... - Chemical Industry News

This report studies Sodium Borohydride in Global market, especially in North America, Europe, China, Japan, Southeast Asia and ... 1 Sodium Borohydride Market Overview. 1.1 Product Overview and Scope of Sodium Borohydride. 1.2 Sodium Borohydride Segment by ... 1.2.3 Sodium borohydride liquid. 1.2.4 Type III. 1.3 Sodium Borohydride Segment by Application. 1.3.1 Sodium Borohydride ... 5.2 Global Sodium Borohydride Revenue and Market Share by Type (2011-2016). 5.3 Global Sodium Borohydride Price by Type (2011- ...
more infohttp://www.mynewsdesk.com/us/chemicalgqyr/pressreleases/global-sodium-borohydride-market-research-report-2016-production-size-sales-market-share-consumption-growth-trends-and-forecast-global-dot-dot-dot-1622744

Method of generating hydrogen gas from sodium borohydride (Patent) | SciTech ConnectMethod of generating hydrogen gas from sodium borohydride (Patent) | SciTech Connect

Ruthenium or cobalt catalytic nanoparticles can be incorporated in the micro-disperse particles of sodium borohydride, which ... where the gas is generated by contacting water with micro-disperse particles of sodium borohydride in the presence of a ... to recycle wastewater from a PEM fuel cell to supply water for reacting with the micro-disperse particles of sodium borohydride ...
more infohttps://www.osti.gov/scitech/biblio/921027

Sodium borohydride, Sodium tetrahydroborateSodium borohydride, Sodium tetrahydroborate

Sodium borohydride allows a remarkable reactivation of active sites of the Pd surface.. G. An, M. Lim, K.-S. Chun, H. Rhee, ... Sodium borohydride in the presence of iodine in anhydrous THF converts various sulfoxides to their thioethers in excellent ... A simple and convenient procedure allows the reductive amination of aldehydes and ketones using sodium borohydride as reducing ... The catalytic use of nickel(II) chloride in combination with excess sodium borohydride is environmental benign and tolerates ...
more infohttp://www.organic-chemistry.org/chemicals/reductions/sodiumborohydride-tetrahydroborate.shtm

Potassium borohydride, Potassium tetrahydroboratePotassium borohydride, Potassium tetrahydroborate

A catalytic enantioselective 1,2-reduction of enones with potassium borohydride is catalyzed by a chiral N,N-dioxide-Sc(III) ...
more infohttp://www.organic-chemistry.org/chemicals/reductions/potassiumborohydride.shtm

Potassium borohydride | BK - PubChemPotassium borohydride | BK - PubChem

Potassium borohydride , BK , CID 22892188 - structure, chemical names, physical and chemical properties, classification, ...
more infohttps://pubchem.ncbi.nlm.nih.gov/compound/Potassium-borohydride

APS -APS March Meeting 2010 
- Event - Transition metal based borohydrides for hydrogen storageAPS -APS March Meeting 2010 - Event - Transition metal based borohydrides for hydrogen storage

Abstract: D20.00006 : Transition metal based borohydrides for hydrogen storage. 3:54 PM-4:06 PM. ... Titanium-based metal borohydride structure has the lowest binding energy per hydrogen molecule relative to the cubic TiB$_{12 ... for simple metal based borohydrides ($e.g.,$ \textit{CaB}$_{12}H_{12}$ ), which has a value of $\sim $ 1.5 eV/H$_{2}$, ... suggesting that transition metals play a significant role in lowering the H$_{2}$ binding energy in borohydrides. ...
more infohttp://meetings.aps.org/Meeting/MAR10/Session/D20.6

Magnesium Borohydride for Alternative Energy Applications | China-Mainland | Sigma-AldrichMagnesium Borohydride for Alternative Energy Applications | China-Mainland | Sigma-Aldrich

Magnesium Borohydride for Alternative Energy Applications. By: Joe Porwoll, Material Matters 2009, 4.4, 87. ... Sesha S. Srinivasan of Tuskegee University kindly suggested that we offer Magnesium Borohydride (Aldrich Prod. No. 715247) as a ... 2 Magnesium borohydride crystallizes in a hexagonal phase that is stable at room temperature. At 185 °C, the material converts ...
more infohttps://www.sigmaaldrich.com/china-mainland/zh/technical-documents/articles/material-matters/your-materials-matter7.html

Potassium Tris(1-pyrazolyl)borohydride - Substance Information - ECHAPotassium Tris(1-pyrazolyl)borohydride - Substance Information - ECHA

Harmonised classification and labelling is a legally binding classification and labelling for a substance, agreed at European Community level. Harmonisation is based on the substances physical, toxicological and eco-toxicological hazard assessment. The Hazard classification and labelling section uses the signal word, pictogram(s) and hazard statements of the substance under the harmonised classification and labelling (CLH) as its primary source of information.. If the substance is covered by more than one CLH entry (e.g. disodium tetraborate EC no. 215-540-4, is covered by three harmonisations: 005-011-00-4; 005-011-01-1 and 005-011-02-9), CLH information cannot be displayed in the InfoCard as the difference between the CLH classifications requires manual interpretation or verification. If a substance is classified under multiple CLH entries, a link to the C&L Inventory is provided to allow users to view CLH information associated with the substance, instead of having the information ...
more infohttps://echa.europa.eu/substance-information/-/substanceinfo/100.203.487

Reduction of Nitriles and Amides to Amines with Tetrabutylammonium Borohydride - [www.rhodium.ws]Reduction of Nitriles and Amides to Amines with Tetrabutylammonium Borohydride - [www.rhodium.ws]

... n-butylammonium borohydride3-6 in refluxing dichloromethane, in which the chemospecificity of tetra-n-butylammonium borohydride ... Reduction of p-tolunitrile with tetra-n-butylammonium borohydride to p-tolubenzylamine:. To a solution of 298mg (2.55mmol) of p ... Reduction of acetanilide with tetra-n-butylammonium borohydride to N-ethyl-aniline:. To a solution of 543mg (4.01mmol) of ... The reduction of nitriles and amides to the corresponding amines with tetra-n-butylammonium borohydride in dichloromethane has ...
more infohttps://www.erowid.org/archive/rhodium/chemistry/amide-nitrile2amine.bu4bh4.html

Sodium borohydride, 99%, VenPure™ SF powderSodium borohydride, 99%, VenPure™ SF powder

Solubility in water: reacts. Other solubilities: soluble in ammonia - reacts with acids, soluble in amines, pyridine and dimethylether of, diethylene glycol, insol.in other ethers, hydrocarb., alkyl chlorides, reacts with oxidizing agents ...
more infohttps://www.fishersci.ca/shop/products/sodium-borohydride-99-acros-organics-1/AC448480100

Biotage - Biotage® MP-BorohydrideBiotage - Biotage® MP-Borohydride

Biotage® MP-Borohydride Reducing Agent Biotage® MP-Borohydride is a macroporous, solid-supported borohydride that is a solid- ... solid-supported borohydride that is a solid-supported equivalent of tetraalkylammonium borohydride. The bound borohydride is a ... Biotage® MP-Borohydride. All-purpose Borohydride Based Reducing Agent, no Aqueous Work-up Required. ... supported equivalent of tetraalkylammonium borohydride. The bound borohydride is a versatile reducing agent used for the ...
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Materials | Free Full-Text | Synthesis of Magnesium Nickel Boride Aggregates via Borohydride Autogenous PressureMaterials | Free Full-Text | Synthesis of Magnesium Nickel Boride Aggregates via Borohydride Autogenous Pressure

Synthesis of Magnesium Nickel Boride Aggregates via Borohydride Autogenous Pressure by Mahboobeh Shahbazi *, Henrietta E. ... Shahbazi, M.; Cathey, H.E.; Mackinnon, I.D.R. Synthesis of Magnesium Nickel Boride Aggregates via Borohydride Autogenous ... "Synthesis of Magnesium Nickel Boride Aggregates via Borohydride Autogenous Pressure." Materials 11, no. 4: 480. ... Synthesis of Magnesium Nickel Boride Aggregates via Borohydride Autogenous Pressure. Materials. 2018; 11(4):480. ...
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Sodium borohydride, 99%, (VenPure(TM) AF caplets), caplets, Acros Organics
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Global and Chinese Sodium Borohydride Industry R... (   DUBLIN   July 15 2014 /-   http://....)Global and Chinese Sodium Borohydride Industry R... ( DUBLIN July 15 2014 /- http://....)

DUBLIN July 15 2014 /- http://...,Global,and,Chinese,Sodium,Borohydride,Industry,Report,2014,biological,advanced biology ... Chapter Four Sodium Borohydride Development Policy and Plan. Chapter Five Sodium Borohydride Manufacturing Process and Cost ... Chapter One Sodium Borohydride Industry Overview. Chapter Two Sodium Borohydride International and China Market Analysis. ... Chapter Nine Sodium Borohydride Marketing Channels Analysis. Chapter Ten Sodium Borohydride Industry Development Trend. Chapter ...
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Sodium BorohydrideSodium Borohydride

Effects of Exposure:To the best of our knowledge the chemical, physical and toxicological properties of sodium borohydride have ... Other Precautions: Sodium borohydride is hygroscopic, protect from water and humidity. Handle and store in a controlled ... may polymerize upon contact with sodium borohydride. When heated to decomposition it emits toxic fumes of Na2O. ...
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A Simple Link between Hydrocarbon and Borohydride ChemistriesA Simple Link between Hydrocarbon and Borohydride Chemistries

A clear link between the hydrocarbon and borohydride chemistries is established by showing that hydrocarbons and borohydrides ... A Simple Link between Hydrocarbon and Borohydride Chemistries Written by jags. A Simple Link between Hydrocarbon and ... Application of the proposed method to archetypal hydrocarbons leads to well-known borohydrides but, more importantly, it allows ... Borohydride Chemistries. Scientific Highlights Cover, Methodologies for materials science and nanotechnology 18 March 2013 6372 ...
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  • When the borohydride complex is volatile, this decomposition pathway is the basis of chemical vapor deposition, a way of depositing thin films of metal borides. (wikipedia.org)
  • The decomposition temperature of tetra-n-butylammonium borohydride semiclathrate was measured at 5.7 °C, which is higher than that for pure THF hydrate (4.4 °C). The present results reveal that the BH4− anion is capable of stabilizing tetraalkylammonium hydrates. (mendeley.com)
  • Using \textit{ab-initio} studies based on the density-functional theory, we have calculated binding energies per hydrogen molecule for decomposition reactions of transition metal borohydrides \textit{MH}$_{x}B_{12}H_{12}$ to \textit{MB}$_{12}$ structures, where $M$ corresponds to Sc\textit{, Ti, or V}. Depending on the valence of the transition metal, $x$ can be 1$, 2$, or $3. (aps.org)
  • Thus, the impure alkali metal borohydride may be placed in a reaction vessel and diborane brought in contact with it for a suitable time and at a suitable temperature. (google.com)
  • It has been found that the impurities present in an alkali metal borohydride, such as sodium borohydride produced by reacting an'alkyl-borate, such as methyl borate with an alkali metal hydride, such as sodiumhydride after removal of the alkali metal alkoxide interfere with or inhibit the reaction between the alkali metal borohydride and halide salts of other metals, such as 'aluminumto form borohydridesof such other metals. (google.com)
  • The Chapter 11 filings and sale did not include the sodium borohydride business owned and operated by Vertellus Performance Chemicals LLC ("VPC") and as of November 1, 2016, Vertellus and VPC are under separate ownership. (vertellus.com)
  • Vertellus is pleased to remain a distributor of VPC's sodium borohydride products in the European Union, China and India. (vertellus.com)
  • Borohydrides can serve as ligands for many metals, and there is a large coordination chemistry of the borohydride ion. (wikipedia.org)
  • Some binary borohydrides (i.e., containing only BH4− ligands) are highly volatile. (wikipedia.org)
  • In metal complexes, the borohydride ion is bound to the metal by means of bridging hydrogen atoms, usually in one of three different ways: monodentate (one hydrogen bridge), bidentate (two hydrogen bridges), and tridentate (three hydrogen bridges) (η1, η2, or η3). (wikipedia.org)
  • Because of their high hydrogen content, borohydride complexes and salts have been of interest in the context of hydrogen storage. (wikipedia.org)
  • The cooperative reducing capability of the two UIII centres now enforced by the large and relatively flexible macrocycle is compared for the two complexes, recognising that the borohydrides can provide additional reducing capability, and that the aryloxide-capped 2-K is constrained to reactions within the cleft. (brad.ac.uk)
  • Sodium borohydride is also used to reduce aldehydes and ketones in the production of pharmaceuticals including chloramphenicol, thiophenicol, vitamin A, atropine, and scopolamine, as well as many flavorings and aromas. (wikipedia.org)
  • A simple and convenient procedure allows the reductive amination of aldehydes and ketones using sodium borohydride as reducing agent and boric acid, p -toluenesulfonic acid monohydrate or benzoic acid as activator under solvent-free conditions. (organic-chemistry.org)
  • In a more specific aspect, this invention relates to a novel process for the polymerization of ethylene, propylene or their mixtures in the presence of certain metal borohydrides and a solid catalytic material containing an oxide of a metal of Group 6a (left hand subgroup of Group 6) of the Mendeleef Periodic Table, viz. (google.com)
  • To a solution of 298mg (2.55mmol) of p-tolunitrile in 15ml of dichloromethane was added 1.969g (7.65mmol) of tetra- n -butylammonium borohydride. (erowid.org)
  • To a solution of 543mg (4.01mmol) of acetanilide in 15ml of dichloromethane was added 3.11g (12.1 mmol) of tetra- n -butylammonium borohydride. (erowid.org)
  • A mixture of benzaldehyde (0.1 g, 1.0 mmol) and MP-Borohydride (2.6 mmol/g, 0.2 g, 0.5 mmol) in MeOH (5 mL) was stirred at room temperature for 3 h. (biotage.com)
  • The SBH Business is the leading manufacturer of sodium borohydride used in the synthesis of fine chemicals such as pharmaceutical ingredients and agrochemicals. (prweb.com)
  • Sodium borohydride is predominantly used as a critical synthesis and process aid in the production of a wide variety of active pharmaceutical ingredients including high growth antiretrovirals for the treatment of HIV/AIDS. (prweb.com)
  • Porous and Dense Magnesium Borohydride Frameworks Synthesis Stability and Reversible Absorption of Guest Species. (docme.ru)
  • Communications DOI: 10.1002/anie.201100675 Hydrogen Storage Porous and Dense Magnesium Borohydride Frameworks: Synthesis, Stability, and Reversible Absorption of Guest Species** Yaroslav Filinchuk,* Bo Richter, Torben R. Jensen,* Vladimir Dmitriev, Dmitry Chernyshov, and Hans Hagemann Hydrogen has been suggested as a carrier of renewable energy in future sustainable energy systems. (docme.ru)
  • Borohydride-based materials have recently received much attention owing to their high gravimetric hydrogen content and straightforward mechanochemical synthesis methods (i.e., ball milling, BM). (docme.ru)
  • formed between an aldehyde and an amine then sodium cyanoborohydride is routinely used for compared to borohydride in the reductive amination process, reducing the Schiff's See the Safety Data Sheet (SDS) for further information. (draadvanariadne.be)
  • A clear link between the hydrocarbon and borohydride chemistries is established by showing that hydrocarbons and borohydrides have a common root regulated by the number of valence electrons in a confined space. (icmab.es)
  • Water also acts to localize the highly excited molecular orbitals of borohydride, causing transitions to excited states with p character to become more intense and a sharp feature, uncharacteristic of tetrahedral molecules, to emerge. (rsc.org)
  • The simulations indicate that water preferentially associates with borohydride on the tetrahedral corners and edges. (rsc.org)