16.12 n&v 809 MH
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چکیده
817 configuration.A similar meiotic structure occurs in a few disparate organisms, such as evening primrose and termite, but it has not been seen before in vertebrates. Grützner and colleagues have created fluorescent ‘paints’ for individual platypus chromosomes. By tagging the chromosomes in this manner, they could determine the number of copies of each chromosome in males and females,and their order in the male meiotic chain (see Fig. 2,
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Chemical characterization of the degradation products of vinblastine dihydrogen sulfate.
Vinblastine was incubated in 0.2 M glycine buffer (pH 7.4 or 8.8) containing bovine serum albumin (1%) at 37 degrees C for 72 h. The reaction mixture was extracted with CH2Cl2, and the extract gave 6 major peaks (A, B, C, D, E, and F) with retention times of 5.0, 7.5, 11.0, 13.0, 23.0, and 30.0 min, respectively, in a high-performance liquid chromatography system (muBondapak C18 column; solvent...
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Let $R$ be a ring, and let $n, d$ be non-negative integers. A right $R$-module $M$ is called $(n, d)$-projective if $Ext^{d+1}_R(M, A)=0$ for every $n$-copresented right $R$-module $A$. $R$ is called right $n$-cocoherent if every $n$-copresented right $R$-module is $(n+1)$-coprese-nted, it is called a right co-$(n,d)$-ring if every right $R$-module is $(n, d)$-projective. $R$...
متن کاملChemical Characterization of the Degradation Products of Vinblastine Dihydrogen Sulfate1
MATERIALS AND METHODS Vinblastine was incubated in 0.2 M glycine buffer (pH 7.4 or 8.8) containing bovine serum albumin (1%) at 37°Cfor 72 h. The reaction mixture was extracted with CH2CI2, and the extract gave 6 major peaks (A, B, C, D, E, and F) with retention times of 5.0, 7.5, 11.0, 13.0, 23.0, and 30.0 min, respectively, in a high-performance liquid chromatography system (/¿Bondapak CÃ-a...
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