4-Carboxy Phenylboronic acid (4-cpba) was investigated theoretically and experimentally by spectroscopic methods such as FT-IR Raman. The molecular structure parameters were determined computational methods. dimer1, dimer2 trimer structures for intermolecular hydrogen bonding. Moreover, minimum conformational energy search carried out potantial surface (PES). Potential distribution analysis of ...

Fibrillins are large cysteine-rich glycoproteins (~350 kDa) which form the molecular scaffold of a class of beaded microfibrils that are key structural elements of dynamic connective tissues (Kielty and Shuttleworth, 1995). These microfibrils are extensible polymers which act as a structural lattice for elastin deposition during elastic fibre formation (Mecham and Heusar, 1991). Linkage of the ...

The spectrophotometric method of Commins and Lawther (I965) for the determination of carboxy-haemoglobin saturation in blood was found to lead to systematic undervaluation, because of dissociation of the carboxyhaemoglobin, and physical dissolution of the carbon monoxide in the solvent used for the analysis. The theoretical relationship between the true and apparent carboxyhaemoglobin saturatio...

This study evaluated the effect of adjuvants viz. glycerol, boric acid, carboxy methyl cellulose (CMC) and Tween-80 on growth Metarhizium rileyi (Farlow) Kepler, Rehner Humber isolates. Their virulence against Spodoptera litura (F.) larvae has also been assessed. The isolates were observed to exhibit maximum surface area coverage biomass with glycerol @ 5% CMC 0.5%. Further, NIPHM isolate M. su...

A new compound, euparvic acid (1, C(14)H(16)O(6)), and the known compounds 5,7-dihydroxy-4-methylphthalide (2), 6-(3-carboxybutyl)-7-hydroxy-5-methoxy-4-methylphthalan-1-one (3), 6-(5-carboxy-3-methylpent-2-enyl)-7-hydroxy-5-methoxy-4-methylphthalan-1-one (4), and 6-(5-carboxy-4-hydroxy-3-methylpent-2-enyl)-7-hydroxy-5-methoxy-4-methylphthalan-1-one (5) were isolated from the EtOAc extract of E...

[Carboxy-14C]-3-amino-5-hydroxybenzoic acid (AHBA) has been shown to be incorporated by Streptomyces spectabilis to the extent of greater than 0.1% (35: 1 dilution) in the ansamycin antibiotic streptovaricin C, the major component of the streptovaricin complex. When [carboxy-13C]AHBA was similarly administered, C-21 (quinone methide carbonyl at 188.3 ppm) of streptovaricin C was specifically la...

According to IR, 13C and 1H NMR, APT, 1D NOE, 2D heteronuclear 1H/13C HSQC and 2D DOSY experiments the main chemical constituent of high-molecular preparations from Symphytum asperum, S. caucasicum, S. officinale and Anchusa italica (Boraginaceae) was found to be caffeic acid-derived polyether, namely poly[3-(3,4-dihydroxyphenyl)glyceric acid] (PDPGA) or poly[oxy-1-carboxy-2-(3,4-dihydroxypheny...

The Arizona group of paracolon bacteria was first investigated by Peluffo et al. (1942). Studies on this group of organisms finally culminated in the report by Edwaards et al. (1947) that established an antigenic scheme of classification independent of the Salmonella scheme. The BethesdaBallerup group of paracolons was definitively studied by West and Edwards (1954), although the original Balle...

The relative binding affinity of Zn2+ to several glycosaminoglycans was determined by gel-filtration chromatography. Binding was observed only between Zn2+ and heparin. No binding was observed between Zn2+ and chondroitin 4-sulphate, chondroitin 6-sulphate, dermatan sulphate or hyaluronic acid. All of the glycosaminoglycans contained carboxy groups, but only heparin bound Zn2+. This observation...

Gold-catalyzed intermolecular oxidation of carboxylates of primary or secondary propargylic alcohols are realized with excellent regioselectivity, which is ascribed to inductive polarization of the C-C triple bond by the electron-withdrawing carboxy group. The gold carbene intermediates thus generated undergo selective 1,2-acyloxy migration over a 1,2-C-H insertion, and the selectivities could ...