Among biochemical tests useful in the study of mycobacteria, the hydroxylamine test is shown to be an effective tool in the differentiation of Mycobacterium kansasii from saprophytic strains of group III acid-fast bacilli when combined with the photochromogen test.

The new 3,5-(substituted) pyrazoles and isoxazoles were prepared by reaction of (N'(1)E, N'(3)E)- N'(1), N'(3)-bis (3,4,5-substitutedbenzylidene)malonohydrazide with hydrazine hydrate and hydroxylamine hydrochloride respectively under solvothermal conditions involving an ecofriendly method without any environmental pollution, the yield are in the range of 75-96%. The structure of the new compou...

The present work is a continuation of our research on the content of heavy metals in the soil of allotment gardens located in the area of . It presents results of the determination of bioavailable and total iron in the soil collected in two allotment gardens in the city. Iron was determined spectrophotometrically in the form of red-pink complex of Fe(II) and 2,2'-dipyridine. The method of deter...

The total synthesis of (+)-nakadomarin A is described. A three-component cycloaddition of a hydroxylamine, aldehyde, and cyclopropane to form a highly functionalized tetrahydro-1,2-oxazine serves as the foundation for this synthesis. The resulting oxazine is formed as a single diastereomer with the absolute configuration being dictated by the chirality of the cyclopropane. Other key steps inclu...

Enantioselective synthesis of β-chiral amines has been achieved via copper-catalyzed hydroamination of 1,1-disubstituted alkenes with hydroxylamine esters in the presence of a hydrosilane. This mild process affords a range of structurally diverse β-chiral amines, including β-deuterated amines, in excellent yields with high enantioselectivities. Furthermore, catalyst loading as low as 0.4 mol% c...

Generation rates of superoxide anions (O2-) by autoxidizing adrenalin at pH 9.5 were determined in solutions containing either superoxide dismutase (0.85 M-1 S-1) or hydroxylamine (0.0185 M-1 S-1) as competitive scavengers. The rate constants of O2- with adrenalin and hydroxylamine were calculated for neutral and alkaline solutions. The respective values were for adrenalin: 5.6 X 10(4) M-1 S-1,...

Treatment of polycytidylic acid with hydroxylamine produces an inactivation of its template properties as measured by incorporation of guanosine 5’-phosphate. Partial recovery of the guanosine 5’-phosphate incorporation can be obtained by the addition of adenosine 5’-triphosphate, but not @dine 5’4riphosphate or uridine 5’4riphosphate. Nearest neighbor studies showed that the adenosine 5’-phosp...

Catalases from 16 different organisms including representatives from all three phylogenetic clades were purified and characterized to provide a comparative picture of their respective properties. Collectively the enzymes presented a diverse range of activities and properties. Specific activities ranged from 20,700 to 273,800 units per milligram of protein and maximal turnover rates ranged from ...