1. C(14)-labeled beta-aminopropionitrile distributed throughout the egg contents within 10 minutes postinjection. By ion exchange chromatography and electrophoretic analysis three major components of the extractable dialyzable radioactive material could be demonstrated, representing at least 80 per cent of the total. The acidic and basic components were identified as beta-aminopropionitrile and...

Etioplasts isolated from barley leaves and purified on a Sephadex G-50 (coarse) column were characterized by electron microscopy and nucleic acid analysis. The majority of etioplasts retained an intact outer envelope, and contamination by other fragments was extremely low. The level of gibberellin-like substances extractable from intact etioplast suspensions was enhanced within 5 min of the ter...

When Brassica nigra leaf petiole suspension cells were subjected to 7 days of inorganic phosphate (Pi) starvation the extractable activity of: (a) pyrophosphate:fructose 6-phosphate 1-phosphotransferase, nonphosphorylating NADP-glyceraldehyde 3-phosphate dehydrogenase, phosphoenolpyruvate phosphatase, and phosphoenolpyruvate carboxylase increased at least fivefold, (b) phosphorylating NAD-glyce...

metal ions are the main impurities of water and media ingredients used in fermentation processes. in this research, the effect of ca+2, co+2, cu+2, fe+2, mg+2, mn+2 and zn+2 as chloride and sulfate salts was studied on the clavulanic acid production and streptomyces clavuligerus growth. all chloride salts had negative effect on clavulanic acid production and no clavulanic acid was produced in t...

Abandoned sterile dumps can be a significant source of environmental pollution, therefore the distribution trace elements throughout mining is vital. Monitoring factors in closed perimeters aims to track quality discharged waters emissary and assess acid mine drainage, soil vegetation, stability, condition land surfaces within perimeter deposits. One primary sources land, water air pollution du...

1 Department of Neurology, Centre de référence ‘Démences Rares’, Hôpital de la Pitié Salpêtrière, AP-HP, Paris, France 2 INSERM UMRS 975 – CRICM. Hôpital de la Pitié Salpêtrière, Paris, France 3 Service de Médecine Nucléaire, Hôpital de la Pitié-Salpêtrière, AP-HP, Paris, France 4 Université Pierre et Marie Curie-Paris 6, INSERM, UMR-S 678, Paris, France 5 Service de Neuroradiologie Diagnostiqu...

In gold (Au) exploration, the analysis of both bulk leach extractable (BLEG) and acid-extractable Au in <180μm stream sediment fraction are two most common approaches. The Eskişehir- Sivrihisar region Western Türkiye hosts several orogenic type mineral deposits. purpose this study is to delineate geochemical anomalies ore-related elements track their dispersion, which may lead discovery unknown...

Acid rain results in losses of exchangeable base cations from soils, but the mechanism of base cation displacement from the forest floor is not clear, and has been hypothesized to involve mobilization of aluminum from the mineral soil. We attempted to test the hypothesis that losses of calcium from the forest floor were balanced by increases in Al in New Hampshire northern hardwoods. We measure...