نتایج جستجو برای: potassium dichromate
تعداد نتایج: 77815 فیلتر نتایج به سال:
BACKGROUND Chemicals used in leather tanning, rubber processing, and/or adhesives are the most often-cited culprits in footwear dermatitis. Patch testing patients with suspected shoe dermatitis is essential for diagnosis and management. OBJECTIVES The four goals for this study were to (1) determine the frequency of allergens associated with a shoe source in North American Contact Dermatitis G...
in the present work, the bioassay screening of the essential oil and various extracts of two plants including fruits of heracleum persicum desf. and rhizomes of zingiber officinale rosc. have been studied with brine shrimp test. there is only one report about cytotoxicity of h. sphondylium in literature and so h. persicum has been used as second selection. at first essentials oil and various ex...
Eight strains of laboratory mice were susceptible to subclinical infections with Cryptosporidium sp. at 1 to 4 days of age, but only a transient infection could be established at 21 days of age or older. Immunosuppression of 21-day-old mice failed to render them more susceptible to infection. Laboratory storage conditions for Cryptosporidium sp. were investigated by titration in 1- to 4-day-old...
Phaeochromocytoma is a term used for catecholamine secreting tumors that arise from chromaffin cells of sympathetic paraganglia. The new World Health Organisation (WHO) classification of endocrine tumors has recommended to reserve the term phaeochromocytoma for intraadrenal tumors only and the others are defined as sympathetic or parasympathetic paragangliomas, further categorised by site. Alth...
The coulometric titration of 20-200 peq of acids and bases in DMSO media is described. In the titration of bases, the electro-oxidation of hydrogen at a platinized platinum electrode is used as the source of protons. The conditions for 100 % current efficiency at this electrode are low current density to avoid passivity and regular treatment of the electrode with potassium dichromate-sulfuric a...
Zea mays (maize) and Vigna radiata (green gram) are found to be the chromium (Cr) tolerant and sensitive plants, respectively. In the present paper, we investigate the reduction of the toxicity of Cr in the sensitive plants by the mixed crop cultivation in the field using various amendments. Further, the potassium dichromate was used as the source of hexavalent Cr. The results indicated that Cr...
When jellyfish striated muscles were stimulated directly, the amplitude of contractile tension increased as the stimulation frequency increased. Application of 10 mmol l(-1) caffeine reduced the amplitude of contractile tension and abolished this facilitatory relationship, indicating that calcium stores participate in excitation-contraction coupling. Calcium stores were identified ultrastructur...
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