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)Borohydrides are a category of inorganic compounds containing boron-hydrogen covalent bonds, typically characterized by their ability to donate hydrogen atoms and serve as strong reducing agents in various chemical reactions.
Borohydrides are a class of chemical compounds that contain boron and hydrogen ions (H-). The most common borohydride is sodium borohydride (NaBH4), which is a white, solid compound often used in chemistry as a reducing agent. Borohydrides are known for their ability to donate hydride ions (H:-) in chemical reactions, making them useful for reducing various organic and inorganic compounds. Other borohydrides include lithium borohydride (LiBH4), potassium borohydride (KBH4), and calcium borohydride (Ca(BH4)2).
Borohydride
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 ... Sodium borohydride is the borohydride that is produced on the largest scale industrially, estimated at 5000 tons/year in 2002. ... Borohydride refers to the anion [BH4]−, which is also called tetrahydridoborate, and its salts. Borohydride or hydroborate is ...
Aluminium borohydride
... aluminium borohydride is a covalent compound. Aluminium borohydride is formed by the reaction between sodium borohydride with ... "First-principles study on thermodynamical stability of metal borohydrides: Aluminum borohydride Al(BH4)3". J. Alloys Compd. 446 ... Aluminium borohydride, also known as aluminium tetrahydroborate, is the chemical compound with the formula Al(BH4)3. It is a ... ISBN 0-8493-0594-2. J. Kollonitsch & O. Fuchs (1955). "Preparation of Aluminium Borohydride and its Applications in Organic ...
Sodium borohydride
Various steroids and vitamin A are prepared using sodium borohydride in at least one step. Sodium borohydride has been ... Exploiting this reactivity, sodium borohydride has been used in prototypes of the direct borohydride fuel cell. NaBH4 + 2 H2O ... since the alcohol produced attacks the borohydride to produce an ester of the borohydride, which then reduces the neighboring ... Sodium borohydride is a reducing agent that finds application in papermaking and dye industries. It is also used as a reagent ...
Beryllium borohydride
... is an inorganic compound with the chemical formula Be(BH4)2. Beryllium borohydride is formed by the ... The borohydride ions, BH−4, adopt a tetrahedral geometry. Beryllium is 6-coordinate and adopts a distorted trigonal prismatic ... It can also be formed by the reaction of beryllium chloride and lithium borohydride in a sealed tube at 120 °C: BeCl2 + 2LiBH4 ... The purest beryllium hydride is obtained by the reaction of triphenylphosphine, PPh3, with beryllium borohydride, Be(BH4)2 at ...
Lithium borohydride
... (LiBH4) is a borohydride and known in organic synthesis as a reducing agent for esters. Although less ... As a hydride reducing agent, lithium borohydride is stronger than sodium borohydride but weaker than lithium aluminium hydride ... "Preparation of Quaternary Ammonium Borohydrides from Sodium and Lithium Borohydrides". J. Am. Chem. Soc. 74 (9): 2346-2348. doi ... Direct borohydride fuel cell The greater ratio of energy density to specific energy for hydrogen is because of the very low ...
Uranium borohydride
... was discovered by Hermann Irving Schlesinger and Herbert C. Brown, who also discovered sodium borohydride. ... Uranium borohydride is the inorganic compound with the empirical formula U(BH4)4. Two polymeric forms are known, as well as a ... Uranium borohydride is, after uranium hexafluoride, the most volatile compound of uranium known with a vapor pressure of 4 mmHg ... Borohydrides are nonideal ligands for isotope separations, since there are isotopes of boron that occur naturally in high ...
Direct borohydride fuel cell
... s (DBFCs) are a subcategory of alkaline fuel cells which are directly fed by sodium borohydride or ... 4H2 Direct borohydride fuel cells decompose and oxidize the borohydride directly, side-stepping hydrogen production and even ... Sodium borohydride could potentially be used in more conventional hydrogen fuel cell systems as a means of storing hydrogen. ... Choudhury, N.A.; Raman, R.K.; Sampath, S.; Shukla, A.K. An alkaline direct borohydride fuel cell with hydrogen peroxide as ...
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 ...
List of inorganic compounds
"Beryllium borohydride". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-11-22. PubChem. "Beryllium dibromide". pubchem.ncbi.nlm.nih. ... Na2B4O7 Sodium borohydride - NaBH4 Sodium bromate - NaBrO3 Sodium bromide - NaBr Sodium bromite - NaBrO2 Sodium carbide - Na2C2 ... 2 Beryllium borohydride - Be[BH4]2 Beryllium bromide - BeBr2 Beryllium carbonate - BeCO3 Beryllium chloride - BeCl2 Beryllium ... LiBr Lithium borohydride - LiBH4 Lithium carbonate (Lithium salt) - Li2CO3 Lithium chloride - LiCl Lithium hypochlorite - LiClO ...
Carbonyl reduction
However, these compounds are useful for reducing carboxylic acids and esters to alcohols, since sodium borohydride is not ... Chaikin, Saul W.; Brown, Weldon G. (1949-01-01). "Reduction of Aldehydes, Ketones and Acid Chlorides by Sodium Borohydride". ... Gribble, Gordon W.; Ferguson, Duncan C. (January 1975). "Reactions of sodium borohydride in acidic media. Selective reduction ... Banfi, Luca; Narisano, Enrica; Riva, Renata (2001-01-01). Sodium Borohydride. John Wiley & Sons, Ltd. doi:10.1002/047084289x. ...
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)- ...
Neodymium(III) hydride
"From Metal Hydrides to Metal Borohydrides". Inorganic Chemistry. American Chemical Society (ACS). 57 (17): 10768-10780. doi: ...
Robert Gilliard
"Carbene-Stabilized Beryllium Borohydride". Journal of the American Chemical Society. 134 (24): 9953-9955. doi:10.1021/ja304514f ...
Organoberyllium chemistry
A good example is beryllium borohydride, which dimerizes to form three-center two-electron bonds. Compounds such as these ... Most common ligands attached to beryllium are halides, hydride (like beryllium borohydride in a three-center two-electron bond ... "Carbene-Stabilized Beryllium Borohydride". Journal of the American Chemical Society. 134 (24): 9953-9955. doi:10.1021/ja304514f ...
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 ...
Hermann Irving Schlesinger
He and Herbert C. Brown discovered sodium borohydride in 1940 and both were involved in the further development of borohydride ... "New developments in the chemistry of diborane and the borohydrides. General summary". Journal of the American Chemical Society ...
Meganne Christian
Christian, Meganne (2013). PH.D THESIS: Core-shell borohydrides for reversible hydrogen storage. www.unsworks.unsw.edu.au ( ... she received the 2011 Heinz Harant award and her doctorate in 2014 for research into hydrogen storage with borohydrides. After ...
Tetramethylammonium
"Preparation of quaternary ammonium borohydrides from sodium and lithium borohydrides". J. Am. Chem. Soc. 74 (9): 2346-2348. doi ... tetramethylammonium borohydride has been made from tetramethylammonium hydroxide as shown: Me 4 N + [ OH ] − + Na + [ BH 4 ...
Borane
Its conjugate base is the borohydride anion. Butterfly cluster compound "Borane". Burg, Anton B.; Schlesinger, H. I. (May 1937 ...
Quinoline
GRIBBLE, Gordon W.; HEALD, Peter W. (1975). "Reactions of Sodium Borohydride in Acidic Media; III. Reduction and Alkylation of ... The reduction of quinoline with sodium borohydride in the presence of acetic acid is known to produce Kairoline A. (C.f. ...
Bimetallic nanoparticle
Sodium borohydride is one such reducing agent. Another option is the selection of appropriate counter ion or surfactant. The ...
Vanillyl alcohol
". "Microsoft PowerPoint - Borohydride Reduction of Vanillin.ppt". 2005. Retrieved January 10, 2013. v t e (Articles without ...
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 ...
Droplet-based microfluidics
WAGNER, J; TSHIKHUDO, T; KOHLER, J (2008-01-15). "Microfluidic generation of metal nanoparticles by borohydride reduction". ...
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. ...
Ozonolysis
While the use of sodium borohydride produces alcohols. (R group can also be hydrogens) The use of hydrogen peroxide can produce ...
Nickel boride catalyst
The borohydride must be added gradually to the nickel salt solution, not the other way around, because the product catalyzes ... Reaction of sodium borohydride with nickel salts in ethanol solution. P-2 Nickel, a highly convenient, new, selective ... The P−2 form is prepared similarly from nickel(II) acetate and sodium borohydride in ethanol. An inert atmosphere was found ... doi:10.1021/ic50022a031 Charles A. Brown and Herbert C. Brown (1963): "The reaction of sodium borohydride with nickel acetate ...
Copper hydride
"Structure and spectroscopy of CuH prepared via borohydride reduction". Acta Crystallographica Section B: Structural Science, ...
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 ... Sodium borohydride is the borohydride that is produced on the largest scale industrially, estimated at 5000 tons/year in 2002. ... Borohydride refers to the anion [BH4]−, which is also called tetrahydridoborate, and its salts. Borohydride or hydroborate is ...
Sodium borohydride granules, 99.99 trace metals 16940-66-2
Sodium borohydride granular, 99.99% trace metals basis; CAS No.: 16940-66-2; Synonyms: Sodium tetrahydridoborate; Linear ... Nucleophilic addition of hydride ion from sodium borohydride is an inexpensive alternative method for the Baylis-Hillman ... superlattices in gold colloid solution have been prepared by ligand-induction using AuCl3 reduced with sodium borohydride.. ...
Process for the production of metal borohydrides - Patent US-3164441-A - PubChem
Borohydride intermediates pave the way for magnesium-catalysed enantioselective ketone reduction - Chemical Communications (RSC...
Sodium Borohydride Market Share, Size & Trends Forecast 2030
Sodium borohydride market is expected to grow at a higher single-digit CAGR by 2030. Wastewater treatment & pharmaceutical ... Sodium Borohydride Market: Regional Outlook. Based on regional split, the report "Sodium Borohydride Market" takes into account ... Sodium Borohydride Market. Sodium Borohydride Market Share & Trends Analysis, By Purity (12%, 95%, 97%, 98%), By Form (Crystal ... H.C. Brown and his boss Schlesinger discovered sodium borohydride at University of Chicago in 1942. Sodium Borohydride is also ...
Sodium borohydride, NaBH4, a substance used in the synthesis of m... | Channels for Pearson+
Sciencemadness Discussion Board - Sodium Borohydride/NaBh4, selling some (Eu only mainly) - Powered by XMB 1.9.11
Sodium Borohydride/NaBh4, selling some (Eu only mainly). Hello to all, recently i have bough a small barrel of Nabh4 from a ... Sciencemadness Discussion Board » Fundamentals » Reagents and Apparatus Acquisition » Sodium Borohydride/NaBh4, selling some ( ... Sciencemadness Discussion Board » Fundamentals » Reagents and Apparatus Acquisition » Sodium Borohydride/NaBh4, selling some ( ...
Rotational and translational diffusion in calcium borohydride from QENS and DFT calculations</em>...
Blanchard D. Rotational and translational diffusion in calcium borohydride from QENS and DFT calculations. 2010. Poster session ... Blanchard, D. (2010). Rotational and translational diffusion in calcium borohydride from QENS and DFT calculations. Poster ... Blanchard, D 2010, Rotational and translational diffusion in calcium borohydride from QENS and DFT calculations, Neutrons for ... Rotational and translational diffusion in calcium borohydride from QENS and DFT calculations. Poster session presented at ...
Sodium zinc borohydride
Sodium Borohydride - Choice Organochem LLP
Sodium Borohydride Reduction - OU MyMedia
Metal (boro-) hydrides for high energy density storage and rel...
Pullulan (borohydride reduced) (P-PULLBH) SDS : Megazyme
1,4-β-D-Xylobiitol (borohydride reduced)
Sodium borohydride|--Yixing Lianyang Chemical Co., Ltd.
covalent compounds - What type of bond(s) are present in the borohydride ion? - Chemistry Stack Exchange
DGIST Scholar: A high-spin nickel(II) borohydride complex in dehalogenation
A high-spin nickel(II) borohydride complex in dehalogenation. Author(s). Tak, Hyeonwoo ; Lee, Hyunjoo ; Kang, Joongoo ; Cho, ... A nickel(ii)-borohydride complex bearing a macrocyclic tridentate N-donor ligand, [Ni(Me3-TACN)(BH4)(CH3CN)]+ (Me3-TACN = 1,4,7 ... A kinetic isotope effect value of 1.7 was observed in the dehalogenation of CHCl3 by the nickel(ii)-borohydride complex. ... The structural and spectroscopic characterization clearly shows that the borohydride ligand is bound to the high-spin nickel(ii ...
Electrochemical activity of lightweight borohydrides in lithium cells | Department for Sustainability
Lithium Hydride Sieved - Lithium Hydride Powder and Lithium Borohydride
Lithium Borohydride, Lithium Borohydride, typ. 5 % solution in THF (typ. 2 M) at Axiom Chemicals Private Limited ... We are involved in providing superior grade lithium borohydride, typ. 5 % solution in THF (typ. 2 M). This lithium borohydride ... Lithium Borohydride : 4.5 - 5.5 %. Applications. *Selective reduction of esters, carboxylic acids, amides, epoxides, ketones ... Lithium Borohydride :9.5 - 10.5 %. Applications. *Selective reduction of esters, carboxylic acids, amides, epoxides, ketones ...
EFFECTIVE HYDROLYSIS OF ALKALINE SODIUM BOROHYDRIDE: CoB-TRITON CATALYST | AVESİS
Sodium borohydride CAS: 16940-66-2 BH4Na Reducing agent | Breaking Bad
Preparation of copper nanoparticles by chemical reduction method using potassium borohydride - TNMSC
Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells
direct borohydride fuel cells (DBFC) / Electrocatalysists / borohydride oxidation / oxigen reduction / sodium-borohydride / ... Evaluation of silver-incorporating zeolites as bifunctional electrocatalysts for direct borohydride fuel cells. Authorized ... Ag zeolite shows good activity for the anodic reaction, i.e., borohydride oxidation reaction (BOR) in alkaline media, ... Ag zeolite shows good activity for the anodic reaction, i.e., borohydride oxidation reaction (BOR) in alkaline media, ...
The effects of operating conditions on hydrogen production from sodium borohydride using Box-Wilson optimization technique |...
Sodium borohydride is the most investigated boron compound among hydrogen-carrier materials by researchers because of its ... This study aims to produce hydrogen from sodium borohydride solution whose hydrolysis was carried out both in the absence of ... The effects of operating conditions on hydrogen production from sodium borohydride using Box-Wilson optimization technique ... Keywords: Hydrogen, Hydrogen production, Sodium borohydride, Non-catalytic steam reforming, EFFICIENT CATALYST, HYDROLYSIS, ...
New and efficient catalysts for enantioselective borohydride reduction of ketones and imines<...
The enantioselective borohydride reduction is also applicable to not only C=O bonds in aromatic ketones but also to C=N bonds ... The enantioselective borohydride reduction is also applicable to not only C=O bonds in aromatic ketones but also to C=N bonds ... The enantioselective borohydride reduction is also applicable to not only C=O bonds in aromatic ketones but also to C=N bonds ... The enantioselective borohydride reduction is also applicable to not only C=O bonds in aromatic ketones but also to C=N bonds ...
Frontiers | CYP96T1 of Narcissus sp. aff. pseudonarcissus Catalyzes Formation of the Para-Para' C-C Phenol Couple in the...
... demethylgalanthamine by sodium borohydride reduction and detected by LC-MS/MS (Figure 8A). Sodium borohydride selectively ... Sodium Borohydride Assays and Analysis by LC-MS/MS. Enzymatically formed N-demethylnarwedine from enzyme assays with CYP96T1 ... Figure 8. LC-MS/MS Enhanced Product Ion (EPI) scan of sodium borohydride (NaBH4) treated CYP96T1 assays with 4′-O- ... Stereoisomeric 8-O-demethylmaritidine is present in sodium borohydride reduced CYP96T1 4′-O-methylnorbelladine assays as the ...
sodium borohydride Archives - MCAT and Organic Chemistry Study Guides, Videos, Cheat Sheets, tutoring and more
Filed Under: Oxidation and Reduction Tagged With: NaBH4, reduction, sodium borohydride. 3 Month MCAT Plan. What does a 3-month ... Sodium Borohydride Carbonyl Reduction Reaction and Mechanism. February 10, 2016. By Leah4sci 1 Comment ... Sodium Borohydride NaBH4 is a common reducing reagent used with carbonyl compounds. NaBH4 is a weak reducing agent and will ...
Quantitation of blood protein adducts of acrolein by tritiated sodium borohydride reduction<...
Quantitation of blood protein adducts of acrolein by tritiated sodium borohydride reduction. / Thakore, K. N.; Gan, J. C.; ... Key Words: Acrolein-Protein adducts-Blood-Tritiated borohydride reduction.",. author = "Thakore, {K. N.} and Gan, {J. C.} and A ... Quantitation of blood protein adducts of acrolein by tritiated sodium borohydride reduction. Toxicology Mechanisms and Methods ... Quantitation of blood protein adducts of acrolein by tritiated sodium borohydride reduction. In: Toxicology Mechanisms and ...
Reduction6
- High dispersive copper nanoparticles were prepared by chemical reduction method using potassium borohydride as reducing agent. (csu.edu.cn)
- Optically active aldiminato cobalt(II) complexes have been found to catalyze the enantioselective reduction of ketones with sodium borohydride affording the corresponding optically active secondary alcohols in high chemical yields with high enantioselectivities. (elsevierpure.com)
- The enantioselective borohydride reduction is also applicable to not only C=O bonds in aromatic ketones but also to C=N bonds in aromatic imines. (elsevierpure.com)
- Key Words: Acrolein-Protein adducts-Blood-Tritiated borohydride reduction. (utmb.edu)
- At present, carbon nanotube supported monometallic Ru at 3 wt% Ru loading (3% Ru/CNT) per gram support and bimetallic RuMo at 3 wt% Ru loading per gram support (3% Ru-Mo/CNT) at varying Ru:Mo atomic ratios are synthesized via sodium borohydride (NaBH4) reduction method to investigate their performance towards NaBH4 hydrolysis. (yyu.edu.tr)
- Reduction with sodium-borohydride yielded 81.8 percent of DMPS in urine, with a peak between 1 and 2 hours. (cdc.gov)
NaBH44
- Sodium borohydride, NaBH4, a substance used in the synthesis of m. (pearson.com)
- Sodium borohydride is the most investigated boron compound among hydrogen-carrier materials by researchers because of its stable structure, relatively high hydrogen storage capacity (NaBH4, 10.8% hydrogen by weighing), comparatively cost-efficiency, and nonflammability. (gazi.edu.tr)
- This study aims to produce hydrogen from sodium borohydride solution whose hydrolysis was carried out both in the absence of any catalysts at above 100 degrees C. In order to increase the rate of hydrogen production using NaBH4 solution, the initial concentration of HCl and temperature were optimized using the Box- Wilson method. (gazi.edu.tr)
- Sodium Borohydride NaBH4 is a common reducing reagent used with carbonyl compounds. (leah4sci.com)
Magnesium borohydride1
- The facile formation of a magnesium borohydride species is critical in overcoming competing pathways in the selectivity-determining insertion step. (rsc.org)
Hydrolysis1
- The Co3O4 was believed as active species in catalytic hydrolysis of sodium borohydride. (utm.my)
Aldehydes and ketones2
- 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)
- Sodium borohydride reduces aldehydes and ketones to give the related alcohols. (choiceorg.com)
Hydride1
- Nucleophilic addition of hydride ion from sodium borohydride is an inexpensive alternative method for the Baylis-Hillman reaction to form [E]-a-methylcinnamic acids. (sigmaaldrich.com)
Lithium6
- The most important borohydrides are lithium borohydride and sodium borohydride, but other salts are well known (see Table). (wikipedia.org)
- We are involved in providing superior grade lithium borohydride, typ. (axiomlithium.com)
- 2 M). This lithium borohydride, typ. (axiomlithium.com)
- Lithium borohydride is an inorganic compound with molecular formula LiBH4. (axiomlithium.com)
- Lithium borohydride is a stronger reducing agent and is highly soluble in ethers. (axiomlithium.com)
- Ces équipements « innovants » nous ont ainsi permis d'approfondir nos connaissances pour comprendre (i) les mécanismes de germination / croissance impliqués lors de la synthèse solvothermale de nanoparticules d'oxydes menée en conditions sous- ou supercritiques, (ii) les réactions aux interfaces lors de l'étude des réactions autoentretenues ou des réactions d'hydratation du lithium et (iii) les mécanismes de grossissement des grains et de densification impliqués lors d'un frittage SPS. (u-bourgogne.fr)
Hydrogen release1
- For this reason, this study focuses on hydrogen release rates of alkaline sodium borohydride with different prepared catalysts. (yildiz.edu.tr)
Decomposition pathway1
- When the borohydride complex is volatile, this decomposition pathway is the basis of chemical vapor deposition (CVD), a way of depositing thin films of metal borides. (wikipedia.org)
20201
- Plant shut downs in China, U.S. in the second quarter of 2020 has reduced the production scale of sodium borohydride. (factmr.com)
Potassium1
- After the digestion, potassium iodide and sodium borohydride are added automatically. (usgs.gov)
Schlesinger2
- Alkali metal borohydrides were first described in 1940 by Hermann Irving Schlesinger and Herbert C. Brown. (wikipedia.org)
- H.C. Brown and his boss Schlesinger discovered sodium borohydride at University of Chicago in 1942. (factmr.com)
Alkaline1
- Ag zeolite shows good activity for the anodic reaction, i.e., borohydride oxidation reaction (BOR) in alkaline media, presenting low onset potential and high current densities. (ac.rs)
Boron1
- In the borohydride anion and most of its modifications, boron has a tetrahedral structure. (wikipedia.org)
Chemical2
- Based on the increase in sodium borohydride demand among the industries, for instance increase in the adoption of the sewage treatment plant by food and beverage industries among others, along with the production of various antibiotics in pharmaceutical industry has driven the demand of the chemical. (factmr.com)
- GJ Chemical, Midas Pharma GmbH, Montogomery Chemicals, Kemira, JSC Aviabor, Shanghai Shenyu Pharmaceutical & Chemical Co. Ltd., Vertellus etc. are amongst the prominent players in Sodium Borohydride market accounting for over 65% of the market revenues. (factmr.com)
LiBH41
- Al-Li-borohydride decomposes at ~70 °C, forming LiBH4. (unige.ch)
Synthesis1
- Borohydrides find wide use as reducing agents in organic synthesis. (wikipedia.org)
Bleaching agent1
- The growing trend of use of sodium borohydride as bleaching agent in the pharmaceutical industry with high sustainability rate it is expected to increase the growth of the market. (factmr.com)
Significantly1
- However, regional clusters including Asia and Africa backing the local manufacturers is presenting challenges to global players offering their products at higher price points which in turn is significantly disturbing the overall sodium borohydride market revenues. (factmr.com)
Solution1
- Nanocrystalline superlattices in gold colloid solution have been prepared by ligand-induction using AuCl 3 reduced with sodium borohydride. (sigmaaldrich.com)
Amounts1
- The refinements from synchrotron powder diffraction of different samples revealed the presence of limited amounts of chloride ions replacing the borohydride on one site. (unige.ch)
Fuel cells2
- Three zeolites (A, X and Y) with Ag incorporated in their cages are tested as bifunctional electrocatalysts for direct borohydride fuel cells (DBFCs). (ac.rs)
- TY - JOUR AU - Milikić, Jadranka AU - Oliveira, Raisa C. P. AU - Stoševski, Ivan AU - Krstić, Jugoslav AU - Hercigonja, Radmila AU - Miljanić, Šćepan AU - Santos, Diogo M. F. AU - Šljukić, Biljana PY - 2019 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3317 AB - Three zeolites (A, X and Y) with Ag incorporated in their cages are tested as bifunctional electrocatalysts for direct borohydride fuel cells (DBFCs). (ac.rs)
Content1
- Because of their high hydrogen content, borohydride complexes and salts have been of interest in the context of hydrogen storage. (wikipedia.org)
Production1
- SODIUM BOROHYDRIDE (sodium tetrahydroborate) principal application is the production of sodium dithionite from sulfur dioxide. (choiceorg.com)
Metal2
- In its coordination complexes, the borohydride ion is bound to the metal by means of one to three bridging hydrogen atoms. (wikipedia.org)
- Metal borohydride complexes can often be prepared by a simple salt elimination reaction: TiCl4 + 4 Li[BH4] + Et2O (solvent) → Ti[BH4]4·Et2O + 4 LiCl Some metal tetrahydroborates transform on heating to give metal borides. (wikipedia.org)
Scale1
- Sodium borohydride is the borohydride that is produced on the largest scale industrially, estimated at 5000 tons/year in 2002. (wikipedia.org)
Unique1
- The material shows a unique 3D framework structure within the borohydrides (space group=P-43n, a=11.3640(3) Å). (unige.ch)
Present1
- What type of bond(s) are present in the borohydride ion? (stackexchange.com)
Formation2
- C'est ma volonté d'aller plus loin dans la compréhension des phénomènes associés à la « Réactivité des Solides » et, en particulier, pour maîtriser les différentes étapes conduisant à la formation d'un massif dense à microstructure contrôlée à partir d'une poudre, qui a toujours été le fil conducteur de mes activités de recherche. (u-bourgogne.fr)
- Condensation cascades and methylgroup transfer reactions during the formation of arsane, methyl- and dimethylarsane by aqueous borohydride and (methyl) arsenates. (bvsalud.org)