SYNTHESIS AND STRUCTURE ELUCIDATION OF 1,2,4-TRIAZINO [4,3-b] 1,2,4-TRIAZINES, 1,2,4-TRIAZINO [3,4-C] 1,2,4-TRIAZINES AND 1,2,4-TRIAZINO [4,3-dl l,2,4-TRIAZINES
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synthesis and structure elucidation of 1,2,4-triazino [4,3-b] 1,2,4-triazines, 1,2,4-triazino [3,4-c] 1,2,4-triazines and 1,2,4-triazino [4,3-dl l,2,4-triazines
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Arylhydrazonomalononitriles 1a,b react with phenylhydrazine to yield amidrazones 2a,b that cyclize to give 2-aryl-5-phenylhydrazono-2,5-dihydro-[1,2,4]-triazine-6-carbonitriles 5a,b upon reaction with dimethylformamide dimethylacetal (DMFDMA). Refluxing 5a,b in glacial acetic acid resulted in the formation of the pyrazolo-1,2,4-triazines 6a,b. Compounds 6a,b were also formed upon treatment of 3...
full textDisintegration of antimony-124.
The radiations from 60-day Sb lN have been studied by several investigators. H ales and Jordan [2] used a 1800 spectrometer to study the beta spectrum of Sb124. Tbey report the presence of two components with maximum cnergies at 0.74 ± O.03 and 2.45 ± 0.07 million electron volts (NIev) . ~1iller and Omtiss [3], u ing a thin magnetic len spectrometer , also ob erved a complex beta specLrum, but ...
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Intracellular parasites manipulate host cell apoptosis in different ways either to increase their life span within infected cells or to spread infection. The present data provided information on the cellular changes taking place in spleen and peripheral blood during Plasmodium berghei-infection and indicated apoptosis mediated host immune response during infection. Our results suggested a signi...
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O R IG IN A L A R T IC L E Eddie Fernando Candido Murta Guilherme Carvalho Freire Daniel Capucci Fabri Renato Humberto Fabri Could elective cesarean sections infl uence the birth weight of full-term infants? Discipline of Gynecology and Obstetrics, Universidade Federal do Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil INTRODUCTION Increasing cesarean section rates are a worldwide pheno...
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O R IG IN A L A R T IC L E Julio Elito Junior Luiz Camano Unruptured tubal pregnancy: different treatments for early and late diagnosis Department of Obstetrics, Universidade Federal de São Paulo — Escola Paulista de Medicina, São Paulo, Brazil CONTEXT AND OBJECTIVE: There is evidence that ectopic pregnancies present different behavioral patterns. These distinct evolutions of ectopic pregnancie...
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Journal title
volume 3 issue 2
pages -
publication date 1992-12-01
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