Cell cultures of Varthemia persica DC. have been studied to evaluate their abilities in biotransformation of aromatic and aliphatic precursors. V. Persica (Asteraceae) is an aromatic plant growing in Iran. V. persica contain different terpens but its cell culture does not posses these compounds. Callus cultures of V. persica was established ...

a two-week tunnel study was conducted in monterrey, mexico during june 2009 to characterizevolatile organic compound (voc) emissions from the local vehicle fleet and estimate the correspondingemission factors (efs). the loma larga tunnel (llt), a 532 meter-long structure that is mainly used by lightduty gasoline-powered vehicles was used as the experimental set-up. ambient air samples (2-hour a...

Background: Leukocytospermia is found in both fertile and infertile men with and without evidence of infections of the genital tract. However, despite extensive research done in this subject, the clinical implications of this condition remain unclear. Leukocytes are also commonly found in semen samples, and a level above 1×106/mL is considered pathologic according to WHO criteria. Non-steroidal...

Impurities of drug substances may produce some side effects in patient. Diclofenac Na is a member of non-steroidal anti inflammatory drugs (NSAIDs) family, which is routinely used by patients for the treatment of rheumatoid arthritis and various pains. To develop a method for the determination of synthetic precursors which could be remained as impurities in raw drug materials, Na diclofenac pow...

Impurities of drug substances may produce some side effects in patient. Diclofenac Na is a member of non-steroidal anti inflammatory drugs (NSAIDs) family, which is routinely used by patients for the treatment of rheumatoid arthritis and various pains. To develop a method for the determination of synthetic precursors which could be remained as impurities in raw drug materials, Na diclofenac pow...

Nanocrystalline cobalt ferrite as a magnetic black pigment was synthesized via coordinated precursors with a significant decrease of the synthesis temperature using citric acid as a coordinating agent. The structure and properties of the cobalt ferrite powder were characterized by X-ray diffraction (XRD), colorimetric analysis (L*a*b* color parameters), diffuse reflectance spectroscopy and vibr...

background and objectives: the essential amino acid l-tryptophan can be produced by a condensation reaction between indole and l-serine, catalyzed by b. subtilis with tryptophan synthase activity. application of the tryptophan is widespread in the biotechnology domain and is sometimes added to feed products as a food fortifier. materials and methods: the optimum concentration of the iranian can...