The study of Hg2+ binding with short-chain thiols as cysteine (Cys), dipeptide Cys-Gly and reduced glutathione (GSH) was performed by a recently proposed voltammetric method, using the rotating Au-disk electrode. For every thiol a similar complexation pattern was obtained. The highly stable Hg(t...

4,5-Dimethoxy-2-mercaptobenzylamine (Dmmb) has been protected by acetamidomethyl (Acm) and incorporated into a peptide thioester for use in tandem native chemical ligation. Upon ligation between the thioester and a Cys-peptide, Acm was removed from Dmmb using silver acetate, and a second ligatio...

1Many cyclic peptides are formed using a disulfide bond to increase their conformational rigidity; this provides receptor selectivity and increased potency. However, degradation of the disulfide bond in formulation can lead to a loss of structural stability and biological activity of the peptide...

The photoelectron resonance capture ionization (PERCI) of cysteine (Cys) and small gas-phase neutral peptides that contain the Cys residue (Cys-Gly, γ-Glu-Cys, and glutathione (γ-Glu-Cys-Gly)) is reported. At an ionization energy less than 1 eV two types of dissociative electron attachment ion...

Radical scavenging activities of Tyr-, Trp-, Cys- and Met-Gly and their protective effects against AAPH-induced oxidative damage in erythrocytes were evaluated in this study. This damage includes hemolysis, oxidation of hemoglobin, formation of MDA and the depletion of glutathione (GSH) and cata...

2-Chloro-N-isopropylacetanilide was quantitatively metabolized in chickens in the mercapturic acid pathway (MAP). The MAP metabolites (cysteine conjugate, S-carboxymethyl-N-acetyl cysteine, N-acetyl cysteine conjugate, and N-acetyl cysteine sulfoxide conjugate) were excreted mainly with the urin...

The gas-phase degradation of propachlor (2-chloro-N-isopropylacetanilide), a widely used herbicide, was investigated under atmospheric conditions at the large outdoor European simulation chamber (EUPHORE) in Valencia, Spain. The rate coefficient for the reaction of hydroxyl radicals with propach...

The chiral intermediate (1S,2R)-[3-chloro-2-hydroxy-1-(phenylmethyl)propyl]carbamic acid, 1,1-dimethylethyl ester 2a was prepared for the total synthesis of the HIV protease inhibitor Atazanavir. The diastereoselective reduction of (1S)-[3-chloro-2-oxo-1-(phenylmethyl)propyl] carbamic acid, 1,1-...

ObjectivePolygonatum verticillatum (L.) All. (Ruscaceae), one of the Ashtawarga plants, is widely used for treatment of various ailments. The present study was undertaken to determine the phenolic composition, antioxidant, anti-inflammatory and anticancer activities of several extracts (petroleu...

The reaction of hydrazine with suitably substituted isoureas gives tetraazabicyclo[3.3.0]octanes. The products obtained in this reaction are extremely susceptible to the nature of the substrate and the reaction conditions, but a suitable combination of these can usually be found in order to form...

The reaction of 2-aminobenzylalcohol (2) with diphenyl cyanocarbonimidate (1) gave 2-N-cyanoimino-4H-3,1-benzoxazine (3). The cyanoimino group can be readily replaced by amines to give a variety of 2-amino-4H-3,1-benzoxazines.

This paper reports the synthesis and polymerization of a new methacrylamide derivative, N-[4-(4-methoxyphenylacetyloxy)phenyl]methacrylamide, which supports functional side groups of potential biomedical interest. Polymers obtained by free radical polymerization in a solution of N,N-dimethylform...

We designed and synthesized a new delivery system for the anticancer drug doxorubicin based on a biocompatible hydrophilic poly(2-ethyl-2-oxazoline) (PEtOx) carrier with linear architecture and narrow molar mass distribution. The drug is connected to the polymer backbone via an acid-sensitive hy...

The biopesticide, azadirachtin (Aza) is less hazardous to the environment, but may cause several toxic effects in aquatic organisms. The Cyprinus carpio (n = 12, for all concentrations) after 10 days of acclimation under controlled conditions, were exposed at 20, 40, and 60 μL/L of Aza during 9...

A microorganism identified as Nocardia Sp.capable of converting azadirachtin 1 into three metabolites, viz. 3-deacetylazadirachtin 2, 1-detigloyl-3-deacetyl-azadirachtin-1-ene-3-one 3 and 1-detigloyl-3-deacetyl-11,19-deoxa-12,19-oxa-11-oxo-azadirachtin-1-ene-3-one 4, has been isolated. This is t...

(S)-(3-Hydroxy-3-methyl-1-thionoglutaryl)-Coenzyme A (HMG[ = S]CoA), a dithioester analog of (S)-(3-hydroxy-3-methylglutaryl)-CoA (HMG-CoA), acts as an efficient alternative substrate for avian HMG-CoA lyase. Detection of product formation by HPLC, UV absorbance and coupled enzyme assays indicat...

3-Hydroxy-3-methyl-1-thionoglutaryl-coenzyme A, a dithioester analog of 3-hydroxy-3-methylglutaryl-CoA, has been enzymatically synthesized using the HMG-CoA synthase catalyzed condensation of acetyl-CoA with 3-oxo-1-thionobutyryl-CoA. HMGdithio-CoA is a potent inhibitor of Pseudomonas mevalonii ...

An examination was made as to the ability of Sentinel® Flavor Tabs® (milbemycin oxime/lufenuron) to treat Baylisascaris procyonis infections in dogs. The study was designed as a critical trial and included five naturally infected dogs and two dogs that were experimentally infected. Another dog f...

Two studies were performed to examine the efficacy of milbemycin oxime against fourth-stage larvae or adults of Toxocara cati. In the study to determine efficacy against fourth-stage larvae, 20 domestic shorthair cats were inoculated with 500 embryonated eggs. Four weeks after inoculation, the a...

A series of N-{para-(ferrocenyl) ethynyl benzoyl} amino acid and dipeptide methyl and ethyl esters 4–18 were prepared by coupling para-(ferrocenyl) ethynyl benzoic acid 3 to the amino acids GABA(OMe), GABA(OEt) and the dipeptide esters GlyGly(OMe), GlyGly(OEt), Gly-L-Ala(OMe), Gly-L-Ala(OEt), G...