Inhibitors formed during pretreatment impair lignocellulose bioconversion by making enzymatic saccharification and microbial fermentation less efficient, but conditioning of slurries hydrolysates can improve fermentability sometimes also digestibility. Conditioning pretreated softwood using four industrial reducing agents (sodium sulfite, sodium dithionite, borohydride, hydrogen) was compared w...

The work reports the synthesis and characterization of ternary nanoalloy catalysts silver, bismuth, rhenium from alkaline solutions containing L–cysteine as a complexing agent sodium borohydride reducing agent. UV–Vis spectra dynamic light scattering (DLS) analyses obtained colloids were performed. Additionally, high-resolution transmission electron microscope (HR–TEM) analysis assisted former ...

Gold nanoparticles (AuNP) are widely used for reaction catalysis. The common understanding is that the smaller particles, more reactive they are. It reported here this not always case citrate (Ct) or polyvinylpyrrolidone (PVP) stabilized AuNP in catalytic reduction of 4-nitrophenol with sodium borohydride (NaBH4), when total surface area kept constant. results prove size range 10–58 nm, reactiv...

Since the pioneer studies of Keilin and Hartree (l), considerable evidence has accumulated indicating that cytochrome c oxidase contains two heme moieties that react differently; hence the designation cytochrome U-Q. Reasons for this designat.ion include kinetic studies that show (a) differences in the rate of reduction and oxidation of cytochrome c oxidase measured at the a versus y absorption...

Aldehydes, ketones and imines were readily reduced by sodium borohydride, with the participation of a small amount of water, in good to excellent yields using PEG400 as catalyst in the absence of organic solvents.  2005 Society of Chemical Industry

The use of hydride generation is often useful in environmental analysis. The normal acid sodium tetrahydroborate reaction provides exceptional sensitivity with continuous flow hydride generators. In some situations there are interferences which will mask the sensitivity. An alternative chemistry system is described here and is shown to offer similar sensitivity to that normally used. A commerci...

Sodium boro[3H]hydride reduction of tyrosine decarboxylase from Streptococcus faecalis followed by complete hydrolysis of the enzyme produces epsilon-[3H]pyridoxyllysine. Degradation of this material to [4'-3H]pyridoxamine and stereochemical analysis with apoaspartate aminotransferase shows that the re side at C-4' of the cofactor is exposed to solvent at pH 5.5 and 7.0. After binding of L-tyro...

A method is presented for the rapid determination of total mercury in blood. The reagent used is alkaline sodium borohydride, and no digestion of the sample is needed. The detection limit and sensitivity are 1.15 and 1.59 ng of Hg, respectively. The method gives reproducible results (the CV ranged from 5.3 to 6.7% for low and high mercury blood samples, respectively), comparable to those obtain...

Abstract Marine fish can potentially accumulate heavy metal pollutants, such as mercury, from anthropogenic activities that harm people who consume it. fishes like Bandeng (Chanos chanos), Banjar (Rastrelliger kanagurta), Bawal Hitam (Parastromateus niger), Selar Kuning (Atule mate), Tenggiri (Scomberomorini) , and Tuna (Thunnini) are consumed a lot by in Bandung City. All these were analyzed u...

As catalytic hydrogenation is validated as one of the most useful approach to reduce a potential carcinogenic bromate in water, usage continuous purge H2 gas and precious metal catalysts are typically required, making it less feasible for practical implementation. Since sodium borohydride (NaBH4) represents alternative source releasing non-precious (cobalt (Co)) usually required accelerate hydr...