نتایج جستجو برای: redox reagent

تعداد نتایج: 56175  

Journal: :Clinical chemistry 1967
N Radin

THE POOR QUALITY of reagent chemicals in the United States by 1916 led to the statement by Hillebrand (1) that “the situation is particularly deplorable just now.” In 1919, to overcome the handicap of poor reagent chemicals, representatives of iiidustry, together with representatives of reagent users, undertook jointly under the sponsorship of the American Chemical Society, the task of establis...

Journal: :health scope 0
hossein jafari mansoorian health promotion research center, zahedan university of medical sciences, zahedan, ir iran; health promotion research center, zahedan university of medical sciences, zahedan, ir iran. tel: +98-918813385, fax: +98-5413425837 edris bazrafshan health promotion research center, zahedan university of medical sciences, zahedan, ir iran ahmadreza yari research center for environmental pollutants, qom university of medical sciences, qom, ir iran mostafa alizadeh students scientific research center, zahedan university of medical sciences, zahedan, ir iran

background fenton (fe2+ and h2o2) and modified fenton (fe3+ and h2o2) are two popular methods used in advanced oxidation processes (aop) and degradation of persistent organic pollutants (pops), such as dye compounds. in these processes, fe2+ and fe3+ as catalysts and h2o2 as the oxidizing agent are added to the reactor. objectives the aim of the current study is to assess the abovementioned met...

Journal: :journal of the iranian chemical research 0
pinki b. punjabi photochemistry laboratory, department of chemistry, university college of science, m. l. sukhadia university, udaipur, india noopur ameta photochemistry laboratory, department of chemistry, university college of science, m. l. sukhadia university, udaipur, india jyoti sharma photochemistry laboratory, department of chemistry, university college of science, m. l. sukhadia university, udaipur, india kiran chanderia rakshit ameta photochemistry laboratory, department of chemistry, university college of science, m. l. sukhadia university, udaipur, india

the heterogeneous photo-fenton degradation of crystal violet under visible light has been investigated usingcopper modified iron oxide. the photocatalyst has been prepared by coprecipitation method. the rate ofphotocatalyic degradation of dye was monitored spectrophotometrically. it has been observed thatphotocatalytic degradation follows pseudo first order kinetics. the effect of various param...

2003
RONALD N. JONES HAROLD W. WILSON WILLIAM J. NOVICK

CENTA is a newly synthesized, beta-lactamase-labile, chromogenic cephalosporin reagent which changes color from light yellow (K maximum ca. 340 nm) to chrome yellow (A maximum ca. 405 nm) concomitant with hydrolysis of the betalactam ring. This compound offers promise as a diagnostic reagent comparable to other chromogens (PADAC and nitrocefin) for the early detection of betalactamase-producing...

Journal: :journal of the iranian chemical research 0
mohammad kazem mohammadi islamic azad university, ahvaz branch , faculty of science, ahvaz , iran neda hasanzadeh islamic azad university, ahvaz branch , faculty of science, ahvaz , iran shahriare ghammamy department of chemistry, faculty of science, imam khomeini international university, qazvin, iran

tripropylammonium fluorochromate(vi) (tpafc), is an efficient and new reagent, which isprepared easily and oxidizes thiols to the corresponding disulfides, quickly. the reactions areperformed cleanly and are controlled to stop at the disulfide stage, without over-oxidation andside products. coupling of thiols to their corresponding disulfides, are studied in solution atroom temperature and in s...

Journal: :Clinical chemistry 1997
A M van den Besselaar J Neuteboom J Meeuwisse-Braun R M Bertina

To contribute to the development of a reference reagent for monitoring heparin therapy, a lyophilized partial thromboplastin time (PTT) reagent was prepared from synthetic dioleoylphosphatidylcholine, dioleoylphosphatidylserine, and dioleoylphosphatidylethanolamine, with colloidal silica as activator. The reagent, coded 91/558, was contained in sealed glass ampoules; it deteriorated in a heat d...

2003

Rubinstein J (1995) Cohtmn Flotation: Processes, Designs and Practices. New York: Gordon and Breach. Schubert Hand Bischofberger C (1979) On the optimization of hydrodynamics in flotation processes. In: Laskowski J (ed.) Proceedings of the 13th International Mineral Process Congress, pp. 1261-1287. Warsaw: Elsevier. Wills BA (1992) Introduction to Mineral Processing Technology, 5th edn, pp. 558...

Journal: :علوم و تکنولوژی پلیمر 0
شیرین مددی علی اکبر یوسفی الهام کشمیری زاده

kinetics of radical polymerizations of waterborne alkyd/acrylic hybrid resin via batch mini-emulsion technique was studied using redox initiators (tbhp/fe2+/edta/asac  and  tbhp/fe2+/edta/sfs) at relatively low temperatures and thermal initiators (bpo, kps and aibn) at higher temperatures to seek the most suitable initiator system. at the end of all reactions the unreacted monomer content was r...

Journal: :Clinical chemistry 1961
B ZAK E EPSTEIN

R ECENTLY a new reagent was proposed for the determination of cholesterol (1, 2). This reagent was purported to be saturated ferrous sulfate in glacial acetic acid. Since it has been reported that ferrous sulfate is qualitatively insoluble in anhydrous acetic acid (3, 4) and that ferrous iron is “subject to pronounced air oxidation in glacial acetic acid” (5), it was felt that several factors s...

Due to the unique optical properties like high brightness and narrow emission bands of Quantum dots, it is used as simple fluorescence materials in bio-imaging, immunoassays, microarrays, and other applications. To easy invistigate cell lines that overexpressed somtostatin receptors, somatostatin (SST) was conjugated with Quantum dots carrying PEG amine (Qdots-PEG-NH2). The conjugation of SST t...

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