3,5-dinitro-benzoyl chloride was refluxed with different amino acids to form the amino acid derivatives that were reduced with zinc/formic acid, to form the products and the reduced products so formed were cyclized to give the title compounds with benzil in the presence of sodium ethoxide/ethanol. All the intermediates and title compounds were characterized by physical, chemical, analytical and...

P. Besta, K. Janovská, A. Samolejová, A. Beránková, I. Vozňáková, M. Hendrych, Faculty of Metallurgy and Materials Engineering, VŠB – Technical University of Ostrava, Ostrava, Czech Republic This article analyzes the eff ect of zinc in the blast furnac e process and it also analy sis its contents in the input and output raw materials. The results obtained in the long-term research project will ...

Verena Scheumann, Michael Helfrich, Siegrid Schoch and Wolfhart Rüdiger Botanisches Institut der Universität München, Menzinger Straße 67, D-80638 München Z. Naturforsch. 51c, 185-194 (1996); received November 17/Decem ber 18, 1995 Avena sativa L., Infiltration into Etiolated Leaves, Chemical Reduction, Cyanoborohydride, Phytylation The chemical reduction of the formyl group of pheophorbide b w...

The glycine receptor is a pentameric ligand-gated ion channel that is involved in fast inhibitory neurotransmission in the central nervous system. Zinc is an allosteric modulator of glycine receptor function, enhancing the effects of glycine at nanomolar to low-micromolar concentrations and inhibiting its effects at higher concentrations. Low-nanomolar concentrations of contaminating zinc in el...

The influence of zinc, iron, cobalt, and manganese on submerged cultures of Fusarium moniliforme NRRL 13616 was assessed by measuring dry weight accumulation, fusarin C biosynthesis, and ammonia assimilation. Shake flask cultures were grown in a nitrogen-limited defined medium supplemented with various combinations of metal ions according to partial-factorial experimental designs. Zinc (26 to 3...

Arsenic is an environmental toxin that enhances the carcinogenic effect of DNA-damaging agents, such as ultraviolet radiation and benzo[a]pyrene. Interaction with zinc finger proteins has been shown to be an important molecular mechanism for arsenic toxicity and cocarcinogenesis. Arsenicals such as arsenite, arsenic trioxide (ATO), and monomethylarsonous acid (MMA(III)) have been reported to in...

Higher animals typically rely on calcification to harden certain tissues such as bones and teeth. Some notable exceptions can be found in invertebrates: The fangs, teeth, and mandibles of diverse arthropod species have been reported to contain high levels of zinc. Considerable quantities of zinc also occur in the jaws of the marine polychaete worm Nereis sp. High copper levels in the polychaete...

OBJECTIVES Crocin is one of constituents of saffron and has antioxidant property. Zinc chloride is one of the common compounds of zinc with antioxidant activity. The present study was aimed to investigate separate and combined treatment effects of crocin and zinc chloride on blood levels of zinc and metabolic and oxidative parameters in diabetic rats. MATERIALS AND METHODS Diabetes was induce...