نتایج جستجو برای: malon dialdehyde
تعداد نتایج: 730 فیلتر نتایج به سال:
A novel linker strategy is presented based on a double reductive amination of a dialdehyde to the amine of the amphotericin B mycosamine sugar and the biological activity of a series of conjugates is compared to the native amphotericin B.
MacDonald "2 + 2" condensation of a 1,2'-dipyrrylmethane dialdehyde with a 2,2'-dipyrrylmethane afforded a neo-confused porphyrin in 55% yield. In addition, a novel dihydroporphyrin with two appended pyrrolic units was isolated and structurally characterized.
Front cover: Flowering Iris germanica (upper picture) and Iris pseudacorus. Corresponding electron micrographs show the formation of hydrogen peroxide under hypoxia on the plasma membrane and in the cell wall. ABBREVIATIONS AA ascorbic acid ADH alcohol dehydrogenase ANP anaerobically induced proteins CD conjugated dienes CT conjugated rienes CsA cyclosporin A DHA dehydroascorbic acid DHAR dehyd...
The first images of the asteroid 243 Ida from Galileo show an irregular object measuring 56-kilometers by 24 kilometers by 21 kilometers. Its surface is rich in geologic features, including systems of grooves, blocks, chutes, albedo features, crater chains, and a full range of crater morphologies. The largest blocks may be distributed nonuniformly across the surface; lineaments and dark-floored...
Bistren cryptands can be easily synthesised through the Schiff base condensation of two molecules of tren and three molecules of a dialdehyde, followed by hydrogenation of the six C=N double bonds to give octamine cages, whose ellipsoidal cavity can be varied at will, by choosing the appropriate dialdehyde, in order to include substrates of varying sizes and shapes. Bistrens can operate as effe...
A complex between soluble dextran and human hemoglobin has been synthesized by two different methods. In the alkylation method, hemoglobin was allowed to react with bromoacetyl groups incorporated into the dextran; the yield of the complex was about 80% in terms of the hemoglobin used. In the dialdehyde method, hemoglobin was allowed to react with dialdehyde groups on the dextran generated by p...
Polygodial (1) and its derivatives acetal 2 (propylene) and 3 (ethylene) were prepared and their antifeedant activity and toxic effects evaluated on several insect species with different feeding ecologies (Spodoptera littoralis, Leptinotarsa decemlineata, Myzus persicae and Rhopalosiphum padi) along with that of polygonone (4). We also tested their selective cytotoxic effects on insect-derived ...
A significant effort worldwide is being directed toward development of novel biocides against drug-resistant bacterial and viruses because of the significant potential human infection risks in the general population. We report here the discovery of a strong antiviral biocide, dialdheyde starch (DAS). Antiviral tests were carried out against three non-envelop viruses, including two bacterial vir...
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