Specificity of Certain Biochemical Derangements in Hepatocarcinogenesis

The Specificity of Enzymes for Certain Substrates

Sequential phenotypic and biochemical alterations during chemical hepatocarcinogenesis.

Chronic exposure to chemical carcinogens induces in the target tissue a series of complex morphological and biochemical alterations that precede the appearance of overt cancer. Three types of experiments are described: (a) exposure of livers that had received subcarcinogenic doses of N-2-fluorenylacetamide to a subcarcinogenic dose of dimethylnitrosamine resulted in a 100% yield of neoplastic ...

Biochemical investigations of retinotectal adhesive specificity

The preferential adhesion of chick neural retina cells to surfaces of intact optic tecta has been investigated biochemically. The study uses a collection assay in which single cells from either dorsal or ventral halves of neural retain adhere preferentially to ventral or dorsal halves of optic tecta respectively. The data presented support the following conclusions: (a) The adhesion of ventral ...

On Parallel Generation of Partial Derangements, Derangements and Permutations

The concept of a partial derangement is introduced and a versatile representation of partial derangements is proposed with permutations and derangements as special cases. The representation is derived from a representation of permutations by iterative decomposition of symmetric permutation group Sn into cosets. New algorithms are proposed for generation of partial set derangements in t. The con...

extensions, minimality and idempotents of certain semigroup compactifications

در فصل اول مقدمات و پیش نیازهای لازم برای فصل های بعدی فراهم گردیده است . در فصل دوم مساله توسیع مورد توجه قرار گرفته و ابتدا شرایطی که تحت آن از یک فشرده سازی نیم گروهی خاص یک زیرگروه نرمال بسته یک گروه به یک فشرده سازی متناظر با فشرده سازی اولیه برای گروه رسید مورد بررسی قرار گرفته و سپس ارتیاط بین ساختارهای مختلف روی این دو فشرده سازی از جمله ایده آل های مینیمال چپ و راست و... مورد بررسی قرا...