The addition of phosphite during melt processing of polyester leads to the creation of two different types of linkages: ester bonds and bonds including phosphorus atoms. The influence of different parameters on these reactions has been investigated. Experiments carried out with different grades ...

This study progresses our earlier studies and takes the performance characteristics of a 1:1 Irganox 1010: Irgafos 168 combination at 1000 ppm each through multiple extrusion processes in a metallocene LLDPE (mLLDPE) investigating for the first time the role of a broad range of calcium and zinc ...

Summary1.New compounds were prepared by reaction of chloromethylacetate with alkaline salts of xanthic, O,O-dialkyldithiophosphoric and diethyldithiocarbamic acids. The structure of the compounds obtained was confirmed by IR and PMR spectroscopy.2.Acetoxymethyl esters of xanthic, diethyldithioca...

Rats were treated with disulfiram (Antabuse®, DSF) or its metabolite diethyldithiocarbamic acid methyl ester (Me-DDC) and challenged with ethanol. The blood pressure response to ethanol was followed and blood was analyzed for DSF, Me-DDC and diethyldithiocarbamic acid (DDC). The rat liver aldehy...

Formamide residue is a major oxidative DNA damage product from ionizing radiation on thymine residues in DNA. We report NMR and molecular modeling studies on a DNA duplex structure which contains guanine opposite formamide residue. Formamide residue exists as either the cis and trans isomer. For...

The synthesis of N7-(2-deoxy-β-D-erythro-pentofuranosyl)adenine 7Ad, 1) is described. Compound 1 was protected at the 6-amino group with the dimethylaminomethylidene residue (3a), the DMT group was selected for OH-5′ protection (3b) and the 3′-phosphonate 3c was prepared. Solid-phase synthesi...

BackgroundBipolar disorder (BD) is a severe and debilitating psychiatric disorder. However, the precise biological basis remains unknown, hampering the search for novel biomarkers. We performed a metabolomics analysis to discover novel peripheral biomarkers for BD.

The equilibrium constant of adenylosuccinic acid synthesis from guanosine triphosphate, inosine-5′-phosphate and L-aspartate was determined to be 2.9 and 10.0 in the forward and reverse directions respectively at pH 8.0 and 37°. The ΔF° of adenylosuccinic acid hydrolysis to inosine-5′-phosp...

Publisher SummaryThis chapter discusses the preparation and purification of adenylosuccinase and adenylosuccinic acid. The product of the reversible enzymatic reaction between fumaric acid and adenosine 5′-phosphate, adenylosuccinic acid, is prepared in millimole quantities by use of purified y...

In this work, we compare the effects of sorbitol derivatives (1,3:2,4-dibenzylidene sorbitol (DBS), 1,3:2,4-di(p-methylbenzylidene) sorbitol (MDBS) and 1,3:2,4-di(3,4-dimethylbenzylidene) sorbitol (DMDBS)) on the performances of poly(3-octyl thiophene)/[6,6]-phenyl C61-butyric acid methyl ester ...

We proposed a method for the preparation of novel poly(vinylidene fluoride) (PVDF) membranes with self-assembled 1,3:2,4-di(3,4-dimethylbenzylidene) sorbitol (DMDBS). The vapor-induced phase separation (VIPS) method with a dry/wet process was used to produce DMDBS/PVDF composite membranes. The r...

The 1,3:2,4-dibenzylidene-D-sorbitol (DBS) molecule is capable of self-organizing into nanoscale fibrils through intermolecular forces such as hydrogen bonding and π interactions. At sufficiently high concentrations (typically less than ∼2 wt%), the nanofibrils can form a network that promotes...

Synchrotron small-angle X-ray scattering (SAXS) and polarized optical microscopy were used to investigate structures of 1,3:2,4-dibenzylidene sorbitol (DBS) gels in various solvents at temperatures above and below the sol–gel transition temperatures. DBS formed a transparent gel in acetophenone...

6-Deoxy-6-fluoro-α-d-galactose (1) was converted by conventional methods into crystalline 2,3,4-tri-O-acetyl-6-deoxy-6-fluoro-α-d-galactosyl bromide (2). Treatment of 2 with methanol-silver carbonate gave the methyl β-glycoside and reaction with silver diphenyl phosphate, followed by hydrogen...

Phosphate rock needs processing to reduce the content of gangue minerals such as silicates, carbonates, and clays to meet the requirements of the phosphate industry. Froth flotation method has been an important part of the concentration process since the 1920s and today, more than half of the wo...

Phosphate selective electrodes have been produced based upon rubbery membranes containing heterocylic macrocycles as sensors covalently bound to a cross-linked polystyrene-block–polybutadiene-block–polystyrene (SBS) polymer. The membranes were robust and the best HPO42−-selective membrane fabr...

Partition coefficients of amino acids, including glycine, alanine, 2-aminobutyric acid, valine, leucine, threonine, methinoine, tryptophan and tyrosine, in [Cnmim]Br (n = 4, 6, 8) + K2HPO4 aqueous two-phase systems (ATPSs) have been determined, and the relative hydrophobicity of the equilibrium ...

The phase diagrams of the {1-butyl-3-methylimidazolium nitrate ([Bmim][NO3]) / 1-hexyl-3-methylimidazolium nitrate ([Hmim][NO3]) + dipotassium hydrogen phosphate (K2HPO4)}c aqueous biphasic systems (ABS) and the binodal curves of {1-octyl-3-methylimidazolium nitrate ([Omim][NO3]) + K2HPO4} ABS h...

We found that dibenzyl phosphate can be used as an ionophore to make a lead-selective membrane electrode. An electrode constructed using dibenzyl phosphate and bis(1-butylpentyl) adipate as a solvent mediator in a poly(vinyl chloride) membrane matrix exhibited a near-Nernstian response to Pb2+ i...

PVC-based membranes of 5,11,17,23,29,35-hexa-tert-butyl-37,38,39,40,41,42-hexakis(carbamoylmethoxy)calix[6]arene (I) as electroactive material with dioctyl phthalate (DOP), 1-chloronaphthalene (CN), dibutyl phthalate (DBP), o-nitrophenyl octyl ether (NPOE) and tris(2-ethylhexyl) phosphate (TEP) ...