Volumetric Determination of Molybdenum as Lead Molybdate by Using Dithizone as an Internal Indicator

Bioassay of Chlorsulfuron Residue in Soil by Using Cress (Lepidium sativum L.) Plant as an Indicator

M.Sc Student, Pardis Faculty of Agriculture and Animal Science, Tehran University, Iran 2- Ph.D Student, Pardis Faculty of Agriculture and Animal Science, Tehran University, Iran Received:11 Nov. 2007 Accepted: 7 Feb. 2008 ABSTRACT Chlorsulfuron is a herbicide which shows carry over effects. Their residues may damage subsequent crops presented in rotational program. Bioassay is considered a goo...

Erythrocyte arginase activity as an indicator of lead exposure.

Molybdate Reduction to Molybdenum Blue by an Antarctic Bacterium

A molybdenum-reducing bacterium from Antarctica has been isolated. The bacterium converts sodium molybdate or Mo⁶⁺ to molybdenum blue (Mo-blue). Electron donors such as glucose, sucrose, fructose, and lactose supported molybdate reduction. Ammonium sulphate was the best nitrogen source for molybdate reduction. Optimal conditions for molybdate reduction were between 30 and 50 mM molybdate, betwe...

an investigation into translation of cultural concepts by beginner and advance student using think – aloud protocols

this research aims at answering the questions about translation problems and strategies applied by translators when translating cultural concepts. in order to address this issue, qualitative and quantitative study were conducted on two groups of subjects at imam reza international university of mashhad. these two groups were assigned as beginner and advanced translation students (10 students). ...

Determination of chlorophyll in plant samples by liquid chromatography using zinc-phthalocyanine as an internal standard.

Chlorophyll analysis at high precision and accuracy is limited by the lack of suitable, commercially available internal standards for HPLC analysis. Here, the commercially available dye zinc-phthalocyanine is presented as a new internal standard to quantify chlorophylls in vegetable foods and to detect chlorophyll degradation products. The technique was applied to chlorophyll analysis of a sele...