نتایج جستجو برای: o dianisidine

تعداد نتایج: 554293  

Journal: :Chemistry 2006
Krzysztof Okrasa Romas J Kazlauskas

Carbonic anhydrase is a zinc metalloenzyme that catalyzes the hydration of carbon dioxide to bicarbonate. Replacing the active-site zinc with manganese yielded manganese-substituted carbonic anhydrase (CA[Mn]), which shows peroxidase activity with a bicarbonate-dependent mechanism. In the presence of bicarbonate and hydrogen peroxide, (CA[Mn]) catalyzed the efficient oxidation of o-dianisidine ...

Journal: :International microbiology : the official journal of the Spanish Society for Microbiology 2008
Edgar Dantán-González Odón Vite-Vallejo Claudia Martínez-Anaya Mónica Méndez-Sánchez María C González Laura A Palomares Jorge Folch-Mallol

A thermotolerant and halotolerant strain of Pycnoporus sanguineus was isolated from an oil-polluted site in a tropical area located in Veracruz, Mexico. This strain was able to grow at 47 degrees C and in culture medium containing 500 mM NaCl. The strain was also tolerant to the presence of 30,000 ppm of crude Maya oil. A 68-kDa protein purified from submerged cultures exhibited laccase activit...

Journal: :Haematologica 2011
Ana Cvejic Jovana Serbanovic-Canic Derek L Stemple Willem H Ouwehand

BACKGROUND The Meis1 protein represents an important cofactor for Hox and Pbx1 and is implicated in human and murine leukemias. Though much is known about the role of meis1 in leukemogenesis, its function in normal hematopoiesis remains largely unclear. Here we characterized the role of the proto-oncogene, meis1, during zebrafish primitive and definitive hematopoiesis. DESIGN AND METHODS Zebr...

Journal: :The Journal of experimental biology 2012
Shun Maekawa Hitomi Iemura Yuko Kuramochi Nami Nogawa-Kosaka Hironori Nishikawa Takehito Okui Youichi Aizawa Takashi Kato

Diminished erythrocyte count and erythropoiesis have been reported during hypothermia in some ectothermic animals. In this study, the African clawed frog, Xenopus laevis, was used to investigate the cause of hypothermia-induced anemia. We developed a new model of hypothermia at 5°C and monitored blood cell count and erythropoiesis on several days. Erythrocyte count declined by 30% on the first ...

Journal: :Biochemical Society transactions 2001
G Regelsberger C Jakopitsch P G Furtmüller F Rueker J Switala P C Loewen C Obinger

Catalase-peroxidases are bifunctional peroxidases exhibiting an overwhelming catalase activity and a substantial peroxidase activity. Here we present a kinetic study of the formation and reduction of the key intermediate compound I by probing the role of the conserved tryptophan at the distal haem cavity site. Two wild-type proteins and three mutants of Synechocystis catalase-peroxidase (W122A ...

Journal: :Chest 1991
M R Elstad D M Stafforini S M Prescott T M McIntyre G A Zimmerman

1 Fowler AA, Hyers TM, Fisher BJ, Bechard DE, Center KM. WTebster RO. The adult respiratory distress syndrome: cell populations and soluble mediators in the airspaces of patients at high risk. Am Rev Respir Dis 1987; 136:1225-31 2 Siler TM, Swierkosz JE, Hyers TM, Fowler AA, Webster RO. Immunoreactive interleukin-1 in bronchoalveolar lavage fluid of high-risk patients and patients with the adul...

Journal: :The Journal of biological chemistry 2003
Shengwei Yu Stefania Girotto Chiuhong Lee Richard S Magliozzo

Catalase-peroxidase (KatG) from Mycobacterium tuberculosis is responsible for the activation of the antitubercular drug isonicotinic acid hydrazide (INH) and is important for survival of M. tuberculosis in macrophages. Characterization of the structure and catalytic mechanism of KatG is being pursued to provide insights into drug (INH) resistance in M. tuberculosis. Site-directed mutagenesis wa...

2005
JOAN F. POWELL

The method described in the present work allows the purity of the solution under test for tocopherols to be assessed and also enables the separation of the commonly occurring a-, yand 8-tocopherols to be achieved. Applications of the method to the examination of several oils indicate the usefulness of the method. For example, the presence of 8tocopherol in soya-bean oil is readily ascertained, ...

2004
Thomas S. Kickler Peter F. Fong George F. Johnson Harvey M. Solomon

We describe a method for determining haptoglobin with a centrifugal analyzer that is based on haptoglobin combining stoichiometrically with hemoglobin to form a complex that has peroxidase-like activity proportional to the quantity of haptoglobin present. Under assay conditions, unbound hemoglobin exhibits only a small fraction of the total peroxidase activity. Activity is measured colorimetric...

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