Stearyl acyl carrier protein, chemically prepared from 1-W stearic acid and Escherichia co2i acyl carrier protein, is desaturated to oleic acid by extracts of photoauxotrophic Euglena gracilis and of spinach. The soluble stearyl acyl carrier protein desaturase system from Eug~ena has been separated into three components, a reduced triphosphopyridine nucleotide oxidase, the desaturase, and a non...

Brain nitric oxide (NO) synthase showed pyridine haemochrome spectra typical of ferroprotoporphyrin IX-containing enzymes. The haem content of purified NO synthase was in the range 0.7-0.9 mol/mol of 160 kDa subunit. In the presence of CO, NO, KCN and miconazole, the L-citrulline-forming activity of NO synthase was markedly diminished, demonstrating that enzyme-bound haem is involved in enzymic...

Paracetamol was polymerized in a reaction mixture containing xanthine oxidase, xanthine and paracetamol. This polymerization reaction was not inhibited by allopurinol or KCN, indicating that neither the molybdenum sites nor the iron-sulphur centres of the enzyme were involved in this catalytic activity. Removal of the flavin centres from the enzyme, however, completely abolished paracetamol oxi...

The activity of nitrate reductase in Rhizobium japonicum is controlled by oxygen tension, and not by nitrate. The enzyme from R. japonicum grown anaerobically in the presence of nitrate resembles that from bacteroids in having a molecular weight of about 69000 daltons; the enzyme from aerobically grown cells ahs a molecular weight of about 170000 daltons. Both types of enzyme have similar Km va...

The manometric study of biological oxidations by the “direct method” of Warburg, when carried out in the presence of cyanide, involves the use of KOH-KCN mixtures (Krebs (4)) for the absorption of carbon dioxide. The following study describes the rate of distillation of HCN from the experimental solution under various conditions, and suggests a remedy for the difficulties occasionally encounter...

Abstract In this article, CuInS 2 (CIS) and Cu(In,Ga)S (CIGS) absorbers are prepared via sulfurization by a sulfur powder source for co-evaporated Cu–In(–Ga) metal precursors without toxic KCN H S. The CIS CIGS growth mechanism during their application to solar cells discussed. X-ray diffraction Raman spectroscopy analyses indicate that CuS (In,Ga) S 3 exist at the frontside backside, respectiv...

THE PARAVENTRICULAR NUCLEUS (PVN) of the hypothalamus is a major integratory region in the hypothalamus that helps maintain homeostasis. Functionally, the PVN is involved in regulation of food intake, responses to stress, modulating metabolic rate, thermoregulation, and regulation of cardiovascular function and the autonomic nervous system (2, 4, 7, 14, 30, 34, 40). It is unique in that in cont...