A family 3 beta-glucosidase (EC 3.2.1.21) from Flavobacterium meningosepticum has been cloned and overexpressed. The mechanistic action of the enzyme was probed by NMR spectroscopy and kinetic investigations, including substrate reactivity, secondary kinetic isotope effects and inhibition studies. The stereochemistry of enzymic hydrolysis was identified as occurring with the retention of an ano...

The reaction of levulinic acid production from glucose has a stage that requires high temperature and activation energy so in this catalyst is needed. required must have lewis site bronsted the acidity very influential for successful levulonic acid. Silica nickel phosphate catalysts sites Ni metal phosphoric silica groups. was measured using pyridine ammonia adsorption method center strength TG...

Objective: The coordination and electrochemistry-related effects uses of piperidine dithiocarbamate (pipdtc) piperazine (pzdtc) are the main topics this article. Method: An environment friendly electroless bath was created using a very small amount biodegradable methanesulphonic bronsted acid, Glyoxylic acid as reducing agent, Xylitol non-toxic natural polyhydroxylic complexing agent potassium ...

in this work, the ionic liquid triethylamine-bonded sulfonic acid {[et3n–so3h]cl}, n,n-diethyl-n-sulfoethanammonium chloride was used as a green acidic homogeneous catalyst to synthesis of 3,4-dihydropyrimidin-2(1h)-ones and 3,4-dihydropyrimidin-2(1h)-thiones as two categories of heterocycles, from aldehyde, dicarbonyl compound and urea or thiourea throughout the one-pot three components cycloc...

The synthesis of 2,2-dimethyloxepane frameworks based on the 7-endo-trig cyclization ene-diol using a catalytic amount metal catalysts (Au, Ag) or Bronsted acid (TfOH) has been developed. Also, spiro-type dioxabicyclic products were also derived from diene-diols. For condition catalysts, selectively reacted between 1,1,3-trisubstituted alkenes and alcohols to form frameworks. On other hand, TfO...

The interactions of two-dimensional vanadium oxide and molybdenum oxide overlayers with the surface hydroxyls of an alumina support were examined with 'H MAS NMR spectroscopy. The measurements demonstrated that these surface metal oxide overlayers are homogeneously distributed over the alumina surface and essentially titrate all the accessible surface hydroxyls at monolayer coverage. The invest...

In this work, the ionic liquid triethylamine-bonded sulfonic acid {[Et3N–SO3H]Cl}, N,N-diethyl-N-sulfoethanammonium chloride was used as a green acidic homogeneous catalyst to synthesis of 3,4-dihydropyrimidin-2(1H)-ones and 3,4-dihydropyrimidin-2(1H)-thiones as two categories of heterocycles, from aldehyde, dicarbonyl compound and urea or thiourea throughout the one-pot three components cycloc...

5-Hydroxymethylfurfural (HMF) is one of the most important lignocellulosic biomass-derived platform molecules for production renewable fuel additives, liquid hydrocarbon fuels, and value-added chemicals. The present work developed niobium oxides (Nb2O5) supported on mesoporous carbon/silica nanocomposite (MCS), as novel solid base catalyst synthesis HMF via one-pot glucose conversion in a bipha...

The interaction between methanol and the Heulandite-type zeolite has been unveiled to give an atomic scale detail regarding catalytic activity of this for conversion. study was carried out by first principle molecular dynamics get insight into structure electronic behaviour inside at different temperatures. studied when location proton Bronsted acid sites varied both possible direct less with m...