Parent pentacyclic triterpenoic acids such as ursolic-, oleanolic, glycyrrhetinic, betulinic and boswellic acid were converted into their acetylated piperazinyl amides that were coupled with rhodamine B. SRB assays to evaluate their cytotoxicity showed all of these triterpene-homopiperazinyl-rho...

Dyes are potential environmental contaminants, liberated in the aqueous streams by the wastewaters of different industries like textiles, pulp, leather, cosmetics, food and paper industries. The present study is focused on the use of waste banana peel as biosorbent for the inexpensive and effici...

A facile synthesis of tunable blue to green luminescent colloidal MAPbBr3 Perovskite NCs is synthesized by solution processed ligand assisted re-precipitation technique (LARP). Different behaviour in optical properties and morphology of MAPbBr3 perovskite NCs has been observed by tuning the rati...

Carbon xerogels was synthesized in the process of polycondensation of resorcinol and formaldehyde. The material was subjected to surface oxidation by a solution of ammonium persulfate, functionalization with amine groups and impregnation with copper(II) chloride. The carbon xerogels were charact...

Fluorescence quenching of Rhodamine B base (RhB) in DMF solution has been studied at different concentrations of the amine Triethyl amine (TEA) and n-butyl amine (NBA) at room temperature. It has been observed that the fluorescence intensity of RhB decrease with increase in the concentration of ...

Efficient syntheses from diacetone glucose of 1,4-dideoxy-1,4-imino-D-arabinitol, (2S,3R,4R)-3,4-dihydroxyproline, fagomine [1,5-imino-1,2,5-trideoxy-D-arabino-hexitol], and (2S,3R,4R)-3,4-dihydroxypipecolic acid by intramolecular nucleophilic displacement by an amino function of 2-O-trifluromet...

A high speed, selective, and robust capillary electrophoresis (CE) method with high capacity was developed and validated for determination of assay of 1,4-dideoxy-1,4-imino-d-arabinitol in active pharmaceutical ingredients, solutions, and tablets during the development work at preclinical and Ph...

Benzylidenation is the only protection required in a 7 step synthesis of the hydrochloride of 1,4-dideoxy-1,4-imino-L-arabinitol from D-lxyonolactone in an overall yield of 21%.

A concise enantioselective synthesis of 1,4-dideoxy-1,4-imino-d-arabinitol, (+)-DAB-1, has been described in good overall yield (18.1%) and with high enantiomeric purity (up to 98% ee) starting from a simple raw material, cis-2-butene-1,4-diol. The Co-catalyzed hydrolytic kinetic resolution of a...

Polyesters based on a difuranic diacid chloride and various aliphatic diols or bisphenols were prepared by solution and interfacial polycondensation. The latter procedure gave, after optimization, materials with much higher molecular weights. These polymers were characterized in terms of both st...

Acylfurans 3 furnished tosylated glycol monoesters 5 when treated with 1,2-diols in the presence of an equivalent of TsOH. This process likely occurs via protiodefuranation of the intermediate furyl ketals to form 1,3-dioxolan-2-ylium cations 8. Subsequent ring-opening via SN2 nucleophilic displ...

The metabolism of [14C]-nitrobenzene and [14C]-4-dimethyl-aminoazobenzene was examined in a tick, Boophilus microplus, and a spider, Nephila plumipes. The reduction of both compounds to aniline is reported in both species. N-Dealkylation of DAB is also recorded.

Nitrobenzene increases methemoglobin formation when incubated with native hemoglobin but not when incubated with red blood cell suspensions. These experiments were designed to determine if transport of nitrobenzene across the red blood cell membrane is a limiting factor for methemoglobin product...

The influence of exposure concentration on the physical and chemical fate of nitrobenzene was studied by providing 0.02, 0.2, 2.0 and 100 μg/ml to roots of intact soybean plants. The results of this study illustrate how plants may govern the physical and chemical fate of environmental pollutant...

Recent studies have demonstrated marked species and strain differences in the toxicity of inhaled nitrobenzene. Since some of these differences could be due to variations in metabolism of nitrobenzene among species and strains, we have compared the metabolism of nitrobenzene in male Fischer-344 ...

Nitrobenzene (NB), a widely used industrial chemical, is a likely human carcinogen. Many dietary constituents can suppress the DNA-adduction, acting as the inhibitors of cancer. In this study, we investigated the inhibitory effects of vitamin C (VC), vitamin E (VE), tea polyphenols (TP), garlic ...

The heterogeneous catalytic ozonation of nitrobenzene in aqueous solution has been carried out at different reaction temperatures in a semi-continuous batch reactor where ceramic honeycomb has been used as a catalyst. The experimental results indicated that the presence of ceramic honeycomb cata...

The degradation efficiencies of nitrobenzene in aqueous solution were investigated by semi-continuous experiments in the processes of ozone alone, ozone/ceramic honeycomb (CH) and ozone/modified ceramic honeycomb (MCH). MCH with 1.0% Mn and 0.5% Cu had more pronounced catalytic ability than CH t...

Catalytic ozonation of nitrobenzene in aqueous solution has been carried out in a semi-continuous laboratory reactor where ceramic honeycomb and Mn–ceramic honeycomb have been used as the catalysts. The presences of the two catalysts significantly improve the degradation efficiency of nitrobenz...

Nitrobenzene exposure is known to produce red blood cell damage as well as engorgement and sinusoidal congestion of the spleen in male Fischer-344 (F-344) rats but not in male B6C3F1 mice. These studies were conducted to investigate the species differences in the covalent binding of [14C]nitrobe...