Biological 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
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).
Metals, Alkali
Metals
Rubidium
Cesium
Lithium
Methanol
Sulfuric Acids
Industry
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.
Sodium
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
Conductometry
Ruthenium
Hydrogenase
Aziridines
Cyclization
Stereoisomerism
Azirines
Palladium
Catalysis
Alkenes
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.
Computer Storage Devices
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.
Magnesium
Encyclopedias as Topic
Iodine
Chemistry, Organic
Chemistry Techniques, Synthetic
Organic Chemistry Processes
Patient Access to Records
Glass
Cosmic Dust
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)
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)
China POTASSIUM BOROHYDRIDE, China Sodium Borohydride, China SODIUM CYANOBOROHYDRIDE, Products Catalog1
Get PDF - Radiolabeling of proteins by reductive alkylation with [14C]formaldehyde and sodium cyanoborohydride
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Abstract: Hydrogen Generation via Sodium Borohydride Hydrolysis Using the Graphene Supported Platinum-Ruthenium-Cobalt...
Europe Sodium Borohydride Market United States, EU, Japan, China, India and Southeast Asia Size, Status and Forecasts 2021 |...
Polysialylated N-Glycans Identified in Human Serum Through Combined Developments in Sample Preparation, Separations and ESI-MS....
SYNTHESIS OF NEW LIGANDS CONTAINING THE SULFONYL GROUP AND ANTIMICROBIAL ACTIVITIES | AVESİS
Academic Journals
Method of generating hydrogen gas from sodium borohydride (Patent) | SciTech Connect
Quantitative Peptidomics with Five-plex Reductive Methylation labels<...
Immunochemical studies of conjugates of isomaltosyl oligosaccharides to lipid. I. Antigenicity of the glycolipids and the...
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Insight into the role of solvents in enhancing hydrogen production: Ru-Co nanoparticles catalyzed sodium borohydride...
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2017-2022 North America Sodium Borohydride Market Report : ReportsnReports
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Magnetically Separable Rh-0/Co3O4 Nanocatalyst Provides over a Million Turnovers in Hydrogen Release from Ammonia Borane |...
Patent US2615788 - Purification of borohydrides of the alkali metals - Google Patents
Haem a compounds as models for cytochromes of group a III. Schiffs bases of haem a and other formylhaems and formyl-porphyrins...
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Vertellus 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 ...
Borohydride - Wikipedia
The most important borohydrides are lithium borohydride and sodium borohydride, but other salts are well known (see Table). ... Some homoleptic borohydride complexes are volatile. One example is uranium borohydride. Metal borohydride complexes can often ... Borohydride refers to the anion BH− 4 and its salts. Borohydride is also the term used for compounds containing BH 4−nX− n, for ... Sodium borohydride is the borohydride that is produced on the largest scale industrially, estimated at 5000 tons/y in 2002. The ...
Aluminium 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 ...
Borohydride | 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 ...
Patent 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 ...
Recommendations 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. ...
Tetra-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 ...
Sodium 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 ...
Global 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- ...
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Method 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 ...
Sodium 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 ...
Potassium borohydride, Potassium tetrahydroborate
Potassium borohydride | BK - PubChem
APS -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. ...
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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 ...
Structure and dynamics of ammonium borohydride - Chemical Communications (RSC Publishing)
Potassium 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 ...
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 ...
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Biotage - 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 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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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 ...
Sodium 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. ...
A 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 ...
Sodium borohydride fuel cells - ePrints Soton
Sodium borohydride fuel cells. Fuel cells utilizing the direct and indirect oxidation of borohydride ions have been described. ... Fuel cells utilizing the direct and indirect oxidation of borohydride ions have been described. Direct borohydride fuel cells ... Ponce de Leon, Carlos and Walsh, Frank (2009) Sodium borohydride fuel cells. In, Dyer, Chris K., Garche, Juergen, Moseley, ... Direct borohydride fuel cells are inherently more efficient than IBFCs; the DBFCs can produce energy densities comparable to ...
Electronic structure of aqueous borohydride: a potential hydrogen storage medium - Physical Chemistry Chemical Physics (RSC...
We examine details of the hydration of sodium borohydride by the combination of X-ray absorption spectroscopy and first ... Borohydride salts have been considered as good prospects for transportable hydrogen storage materials, with molecular hydrogen ... Electronic structure of aqueous borohydride: a potential hydrogen. storage. medium Andrew M. Duffin,ab Alice H. England,ab ... bonds between borohydride and water. that weaken the boron. -. hydrogen. covalent bonds. Water. also acts to localize the ...
Inorganics | Free Full-Text | Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH
... metal borohydrides have recently been receiving attention as possible hydrogen storage materials and solid-state Li-ion ... Keywords: borohydride; rare earth element; hydrogen storage; decomposition; solid state electrolyte borohydride; rare earth ... Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH. Michael Heere 1. ... "Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH." Inorganics 5, no. 2: 31. ...
North AmericaHydrolysisLithium hydridePotassiumNaBH4TetrahydroborateContact with sodium borohydrideMagnesium borohydride MgLiBH4AnionDouble-cation borohydridesCatalytic2017SegmentReduction of BenzophenoneVertellusDecompositionMmolNaBHMethanolAbstractAqueousVenPureForecastReaction2018HydridesRevenuePowderSaltsReactsAldehydesStructuresOrganic synthesisMetalMolecular formulaSODIUM CYANOBOROHYDRIDECompoundsAcidic mediaIndustry chain structurePorousComplexes2019DiboraneReductive
North America4
- In 2016, the North America Sodium Borohydride market size was xx million USD and it will reach xx million USD in 2022, with a CAGR of xx% between 2016 and 2022. (reportsnreports.com)
- Geographically, North America held the largest share in the global sodium borohydride market while Asia Pacific is the largest producer in 2017. (sainimali.com)
- Scope of the Report: This report focuses on the Sodium Borohydride in global market, especially in North America, Europe, Asia-Pacific, South America, Middle East and Africa. (reportsmonitor.com)
- There are 15 Chapters to deeply display the North America Sodium Borohydride market. (globalinforeports.com)
Hydrolysis8
- The IBFCs use the well-studied MEA that is fed with high-purity hydrogen produced from the efficient hydrolysis of sodium borohydride. (soton.ac.uk)
- Borohydride salts have been considered as good prospects for transportable hydrogen storage materials, with molecular hydrogen released via hydrolysis . (rsc.org)
- Prepared by the controlled enzymatic hydrolysis of 4- O -methyl-glucuronoxylan, followed by chromatographic removal of neutral oligomers and borohydride reduction. (megazyme.com)
- One such method is to generate hydrogen via the hydrolysis of aqueous sodium borohydride (NaBH4) solutions, and this has been heavily studied since the turn of the century due to its high theoretical hydrogen storage capacity (10.8 wt%) and relatively safe operation in comparison to other chemical hydrides. (lboro.ac.uk)
- The chemical hydrogen storage represents an alternative approach: the highly efficient production of pure hydrogen by hydrolysis of chemical hydrides , such as sodium borohydride (NaBH 4 ), could make the transition to a "hydrogen economy" a reality. (genport.it)
- Hydrogen from borohydride hydrolysis can be supplied to a PEMFC on demand to power mobile electronic devices, such as mobile phones, laptop computers and so on. (genport.it)
- Solid state sodium borohydride belongs to a group of chemical hydrides based on metal-hydrogen complex, that can react spontaneously and exothermically with water, in the presence of catalysts or acids , and release pure hydrogen via hydrolysis reaction. (genport.it)
- What do you think is the best way to generate hydrogen from hydrolysis of sodium borohydride? (genport.it)
Lithium hydride1
- Currently, the options include lithium hydride, sodium borohydride , and an emerging class of ultraporous nanotech materials. (merriam-webster.com)
Potassium3
- 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. (organic-chemistry.org)
- Sodium or Potassium Borohydride can also be used in-situ to produce other more hostile reducing agents cost effectively. (sainimali.com)
- To 250 [micro]L of 10 mmol/L decylubiquinone we added ~5 mg of potassium borohydride and 10 [micro]L of 0. (thefreedictionary.com)
NaBH43
- Aluminium borohydride is formed by the reaction between sodium borohydride with aluminium chloride: 3 NaBH4 + AlCl3 → Al(BH4)3 + 3 NaCl or as the non-pyrophoric tetrahydrofuran (THF) adduct, by the analogous reaction of calcium borohydride and aluminium chloride in THF: 3 Ca(BH4)2 + 2 AlCl3 → 3 CaCl2 + 2 Al(BH4)3 Like all borohydrides, this compound is a reducing agent and hydride donor. (wikipedia.org)
- Sodium Borohydride NaBH4 is a common reducing reagent used with carbonyl compounds. (leah4sci.com)
- The presence of caustic soda in the spent sodium borohydride (NaBH4) fuel in high concentrations creates environmental problems associated with the transportation and the disposal of the fuel, orits recycling into NaBH4. (yildiz.edu.tr)
Tetrahydroborate1
- Aluminium borohydride, also known as aluminium tetrahydroborate, (in American English, aluminum borohydride and aluminum tetrahydroborate, respectively) is the chemical compound with the formula Al(BH4)3. (wikipedia.org)
Contact with sodium borohydride2
- 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 if you come across it in its natural form. (linuxjournal.com)
- Materials sensitive to polymerization under alkaline conditions, such as acrylonitrile, may polymerize upon contact with sodium borohydride. (espimetals.com)
Magnesium borohydride Mg1
- 6] Magnesium borohydride Mg(BH4)2 is one of the most promising materials for hydrogen-storage applications, as it has a relatively low decomposition temperature, reversible hydrogen desorption,[7, 8] and high gravimetric hydrogen content of 14.9 wt % H2. (docme.ru)
LiBH43
- They synthesized lithium borohydride (LiBH4) from diborane (B2H6): 2 MH + B2H6 → 2 M[BH4] (M = Li, Na, K, etc. (wikipedia.org)
- Metal borohydride complexes can often be prepared by a simple salt elimination reaction: TiCl4 + 4 LiBH4 + Et2O (solvent) → Ti(BH4)4(Et2O) + 4 LiCl Some metal tetrahydroborates transform on heating to give metal borides. (wikipedia.org)
- The molecular formula for Lithium Borohydride is LiBH4 . (convertunits.com)
Anion5
- Borohydride refers to the anion BH− 4 and its salts. (wikipedia.org)
- In the borohydride anion and most of its modifications, boron has a tetrahedral structure. (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)
- Central carbon of benzophenone bonds with one hydrogen from borohydride (BH4), while the benzophenone oxygen briefly exists as an anion, which is a negatively charged atom. (sciencing.com)
- 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. (elsevier.com)
Double-cation borohydrides2
- 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). (epfl.ch)
- We examined T d of double-cation borohydrides ZrLi n-4 (BH 4 ) n , and then the correlation between T d and χ P determined for single-cation borohydrides is extended to double-cation ones. (elsevier.com)
Catalytic3
- 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. (osti.gov)
- 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)
- Sodium cyanoborohydride was at least five times milder toward immunological activity than sodium borohydride, however, sodium cyanoborohydride with a catalytic amount of metal ion (Zn2+ or Al3+) can be as harsh as sodium borohydride. (mysciencework.com)
20171
- Arnold PL, Stevens CJ, Bell NL, Lord RM, Goldberg JM, Nichol GS and Love JB (2017) Multi-electron reduction of sulfur and carbon disulfide using binuclear uranium(III) borohydride complexes. (brad.ac.uk)
Segment4
- For competitor segment, the report includes global key players of Sodium borohydride as well as some small players. (researchandmarkets.com)
- For product type segment, this report lists the main product types of Sodium borohydride market in the Global and China markets. (researchandmarkets.com)
- Secondly, the report states the global Sodium Borohydride market size (volume and value), and the segment markets by regions, types, applications and companies are also discussed. (bigmarketresearch.com)
- The report also provides PEST analysis, PORTER's analysis, SWOT analysis to address questions of shareholders to prioritizing the efforts and investment in near future to emerging segment in Sodium Borohydride market. (sainimali.com)
Reduction of Benzophenone1
- Reduction Of Benzophenone With Sodium Borohydride. (antiessays.com)
Vertellus3
- 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)
- Vertellus is a trusted supplier of VenPure sodium borohydride, the chemical hydride reduction agent of choice in the synthesis of Active Pharmaceutical Ingredients (APIs). (vertellus.com)
Decomposition2
- 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)
- 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)
Mmol4
- 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)
- In a small test tube, sodium borohydride (87mg, 2.2mmol) was dissolved in cold water (1.5ml). (antiessays.com)
NaBH2
- Sodium borohydride (NaBH 4 ) is the most commonly available borohydride, synthesized by reacting methylborate with sodium hydride in mineral oil. (sigmaaldrich.com)
- In fact, the most favoured technology for hydrogen generation from sodium borohydride is, to date, contacting an alkaline solution of sodium borohydryde (eg, NaOH + NaBH 4 ) with suitable catalysts that accelerate the reaction to practically acceptable rates. (genport.it)
Methanol8
- I have gathered from a few sources, not formal, that when a alcohol system is used, the borohydride reacts with the alcohol to form a trimethoxyborohydride if methanol is used, or triacetoxyborohydride if ethanol is used, and so forth. (sciencemadness.org)
- Some sources discourage use of methanol saying it will react and consume the borohydride, instead using isopropanol or ethanol which react slower. (sciencemadness.org)
- I dont think it is the intermediate formed during the reduction of the nitroalkene that causes dimerization, nor that the reaction between methanol and borohydride is a bad thing, could it then be said that having the borohydride in methanol and adding the nitrostyrene dissolved in THF or propyl propanoate would reduce dimerization by immediately reducing nitroalkene to nitroalkane as it is added? (sciencemadness.org)
- I can attest to methanol decomposing sodium borohydride more quickly than ethanol. (sciencemadness.org)
- container D. In the case of alkali or alkaline-earth borohydrides, add methanol (Cat. (emdmillipore.com)
- Benzophenone reacts with sodium borohydride in a methanol solution. (sciencing.com)
- The carbon attracts a hydrogen atom from borohydride, and the oxygen attracts a hydrogen atom from methanol. (sciencing.com)
- Various options for hydrogen storage are being studied ranging gases (hydrogen), liquids (e.g., methanol) to solids (e.g., lithium borohydride, boranes and amides). (elsevier.com)
Abstract1
- abstract = "Magnesium borohydride ammonia borane, Mg(BH4)2(NH3BH3)2, was electrochemically investigated. (elsevier.com)
Aqueous1
- Compared to solid sodium borohydride , the aqueous sample exhibits an uncharacteristically narrow absorption feature that is shifted to lower energy, and ascribed to the formation of dihydrogen bonds between borohydride and water that weaken the boron - hydrogen covalent bonds. (rsc.org)
VenPure2
- For all these reasons, API producers have embraced VenPure sodium borohydride as the reagent of choice for their processess. (vertellus.com)
- VenPure sodium borohydride is the reagent choice for manufacturers of first and second line HIV treatements. (vertellus.com)
Forecast2
- 3. What Is Europe Sodium Borohydride Market Forecast (2016-2021) Considering Sales, Revenue for Regions, Types and Applications? (beforeitsnews.com)
- Global Sodium Borohydride Market was valued at US$ XX Bn in 2019, and is expected to reach US$ XX Bn by 2027, at a CAGR of XX % during forecast period. (sainimali.com)
Reaction8
- The principal products of the reaction are the borohydride of the alkali metal and the alkoxide of the alkali metal. (google.com)
- 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)
- desired, a quantity of diborane sufiicient to react completely with the impurities may be introduced into the reaction vessel and in contact with the impure borohydride by means of a closed system, the diborane then remaining in contact with the borohydride until the reaction is complete. (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)
- A simple and practical protocol for the reduction of carboxylic acids via in situ formation of hydroxybenzotriazole esters followed by reaction with sodium borohydride gives the corresponding alcohols. (organic-chemistry.org)
- This brings me to my next thought, nitrostyrenes are known to dimerize via michael adduct (alkene + alkane reaction, in this case alkene + nitroalkane), and that using a large excess (2.5 - 4 molar) of sodium borohydride to which the nitrostyrene is added incrementally will reduce this significantly. (sciencemadness.org)
- Is the reaction between borohydride and alcohol required to produce the reducing agent responsible for reducing the double bond? (sciencemadness.org)
- Will this reaction still occur in say, DMF or other solvent capable of dissolving the borohydride without reaction? (sciencemadness.org)
20184
- Sodium Borohydride (CAS 137141-62-9) Market Research Report 2018 contents were prepared and placed on the website in April, 2018. (marketpublishers.com)
- Please note that Sodium Borohydride (CAS 137141-62-9) Market Research Report 2018 is a half ready publication and contents are subject to change. (marketpublishers.com)
- Sodium triacetoxy borohydride (CAS 56553-60-7) Market Research Report 2018 contents were worked out and placed on the website in February, 2018. (marketpublishers.com)
- Please note that Sodium triacetoxy borohydride (CAS 56553-60-7) Market Research Report 2018 is a half ready publication and contents are subject to change. (marketpublishers.com)
Hydrides2
- Among the different chemical hydrides, sodium borohydride is very stable and easy to handle and it has been selected for its high hydrogen content. (genport.it)
- Hydrides such as sodium borohydride , lithium aluminium hydride , diisobutylaluminium hydride (DIBAL) and super hydride , are commonly used as reducing agents in chemical synthesis . (wikipedia.org)
Revenue1
- Then, Europe Sodium Borohydride market report focuses on major leading industry players with information such as company profiles, product picture and specification, capacity, production, price, cost, revenue and contact information. (beforeitsnews.com)
Powder5
- Powder X-ray diffraction measurements verify the formation of tetra-n-butylammonium borohydride semiclathrate, while Raman spectroscopic and direct gas release measurements confirm the storage of molecular hydrogen within the vacant cavities. (mendeley.com)
- We have gained immense experience in this domain by offering a wide assortment of Sodium Borohydride ( Powder or Granular). (tradeindia.com)
- Sodium borohydride is a white to grayish crystalline powder. (draadvanariadne.be)
- Sodium borohydride is an inorganic compound with white solid, usually encountered as a powder, is a reducing agent that finds application in chemistry, both in the laboratory and on a technical scale. (sainimali.com)
- Sodium Borohydride, also known as sodium tetrahydridoborate, is a white solid, usually encountered as a powder, widely used as a reducing agent in various industries like pharmaceuticals, pulp & paper, metal recovery, textiles, organic chemical purification and others. (reportsmonitor.com)
Salts2
- The most important borohydrides are lithium borohydride and sodium borohydride, but other salts are well known (see Table). (wikipedia.org)
- Because of their high hydrogen content, borohydride complexes and salts have been of interest in the context of hydrogen storage. (wikipedia.org)
Reacts1
- Briefly, the inventive process comprises the conversion of ethylene principally to high molecular Weight normally solid polymers by contact with one or more of the oxides of chromium, molybdenum, tungsten or uranium, for example, a partially reduced molybdenum trioxide extended upon a support, and a metal borohydride which reacts with water at polymerization temperatures to yield hydrogen. (google.com)
Aldehydes4
- 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)
- Biotage® MP-Borohydride is a versatile reducing agent used for the reduction of carbonyl compounds and imines, and the reductive amination of aldehydes and ketones. (biotage.com)
- Sodium Borohydride works by reducing ketones, aldehydes, peroxides and metal impurities that can lead to color, odor and product instability. (sainimali.com)
Structures1
- Unlike most other metal-borohydrides, which are ionic structures, aluminium borohydride is a covalent compound. (wikipedia.org)
Organic synthesis1
- Borohydrides find wide use as reducing agents in organic synthesis. (wikipedia.org)
Metal11
- Alkali metal borohydrides were first described in 1940 by Hermann Irving Schlesinger and Herbert C. Brown. (wikipedia.org)
- In its coordination complexes, the borohydride ion is bound to the metal by means of one to three bridging hydrogen atoms. (wikipedia.org)
- Borohydrides of the alkali metals can be produced by reacting an alkyl borate with an alkali metal hydride. (google.com)
- It is employed as a precursor for producing other metal borohydrides. (sigmaaldrich.com)
- Our finding should be contrasted with the binding energy/H$_{2}$ 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. (aps.org)
- Rare earth (RE) metal borohydrides have recently been receiving attention as possible hydrogen storage materials and solid-state Li-ion conductors. (mdpi.com)
- To elucidate this issue, we investigate the properties of a number of metal borohydrides with the same problem and find that the electronegativity of the metal cation is not the best descriptor of diborane production. (aps.org)
- We conclude that diborane production is sufficiently suppressed for formation enthalpies of $-$80 kJ/mol BH$_4$ or lower, providing specific design guidelines to tune existing metal borohydrides or synthesize new ones. (aps.org)
- Our work shows that metal borohydrides and coordination polymers can have similar properties and anticipate the existence of novel hybrid materials. (docme.ru)
- Therefore, solution-based methods have been explored to synthesize novel metal borohydrides in a pure form. (docme.ru)
- The thermal desorption temperature T d of single-cation borohydrides was found to decrease with increasing the value of the Pauling electronegativity χ P of the cation (metal). (elsevier.com)
Molecular formula1
- The Molecular Formula of Sodium Borohydride is H4BNa, while the CAS number of Sodium Borohydride is 16940-66-2. (globalinforeports.com)
SODIUM CYANOBOROHYDRIDE1
- 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)
Compounds1
- We wish herein to describe another convenient and efficient method for the reduction of nitriles and amides to the amines with tetra- n -butylammonium borohydride 3-6 in refluxing dichloromethane, in which the chemospecificity of tetra- n -butylammonium borohydride toward organic cyano and amide compounds was observed. (erowid.org)
Acidic media1
- Reactions of sodium borohydride in acidic media. (semanticscholar.org)
Industry chain structure1
- First, the report provides a basic overview of the Sodium Borohydride industry including definitions, classifications, applications and industry chain structure. (bigmarketresearch.com)
Porous2
- 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)
Complexes2
- Some homoleptic borohydride complexes are volatile. (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)
20192
- Sodium borohydride Market Insights 2019, Global and Chinese Scenario is a professional and in-depth study on the current state of the global Sodium borohydride industry with a focus on the Chinese market. (researchandmarkets.com)
- 5. The report then estimates 2019-2024 market development trends of Sodium borohydride industry. (researchandmarkets.com)
Diborane1
- We conclude that stabilizing Al(BH$_4$)$_3$ and similar borohydrides via alloying or other means is a promising route to suppress diborane production and thus develop viable hydrogen storage materials. (aps.org)
Reductive3
- A simple and convenient procedure enables the reductive alkylation of primary and secondary amines and N,N-dimethylation of amino acids using sodium borohydride as reducing agent in 2,2,2- trifluoroethanol without use of a catalyst or any other additive. (organic-chemistry.org)
- Furthermore, Sodium borohydride used in the manufacture of reductive bleach to enhance magazine and newsprint grade paper, the pulp and paper industry is the largest market for Sodium Borohydride products. (sainimali.com)
- In the textile industry, Sodium Borohydride used in combination with sodium bisulfite, and it is used instead of replacement for Sodium Hydrosulfite in vat dyeing, indigo dyeing, color stripping, reductive clearing, machine cleaning and many other applications where a stable, environmentally desirable reducing agent is required. (sainimali.com)