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61.
Movement of 14C-assimilates from young and mature leaves to young rose shoots (Rosa hybrida cv. Marimba) was examined in two developmental stages. In the first stage after bud breaking the young shoot, especially its tip, depends for its supply of assimilates mainly on the mature foliage. At this stage young leaves are powerful sinks and retain 97% of their own photosynthates. The translocated 3% move mainly to the roots. At a later stage, just after the appearance of the flower bud, most of the leaves on the shoot become a source. The upper leaves supply assimilates to the flower bud and to the upper part of the stem. The 14C-assimilates from the lower leaves move in two directions, the larger part being directed downward. 相似文献
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TOSHIRO KAGESHITA ZHI JIAN CHEN JIN-WOO KIM MIKIHIRO KUSAMA ULANA MARIA KEKISH TRACY TRUJILLO MASSIMO TEMPONI ABRAHAM MITTELMAN SOLDANO FERRONE 《Pigment cell & melanoma research》1988,1(Z1):185-191
Following a discussion of the rationale underlying the selection of human melanoma to test the usefulness of anti-idiotypic monoclonal antibodies in the therapy of solid tumors, the development of the anti-idiotypic monoclonal antibody MoAb) MF11–30 is described. This antibody recognizes a private idiotope within the antigen-combining site of the immunizing antihuman high molecular weight melanoma-associated antigen MoAb 225.28. The results of a phase I clinical trial with the MoAb MF11–30 in patients with advanced melanoma are described. The lack of toxic effects and the minor responses in six patients suggest that these studies should be extended to a larger number of patients with an emphasis on the analysis of the mechanisms underlying the clinical response. 相似文献
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IRENE DIGGS 《American anthropologist》1971,73(2):341-343
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SYNOPSIS The rate of photophosphorylation by Euglena chloroplasts depends not only on the physiologic stage of cell growth but also on the stage of development of chloroplasts in these cells at the time of harvesting. Both of these processes can be markedly influenced by a number of environmental factors; they are affected neither in a parallel manner nor completely independent of each other. In addition, the rate of photophosphorylation of chloroplasts can also be greatly affected by the conditions employed for their isolation. After investigating the various environmental factors both during cell growth and chloroplast isolation, we have developed a procedure which increased the photophosphorylation rate of our chloroplast preparations more than 5-fold, giving a specific activity in the range of 100-150 μmoles ATP/mg chlorophyll/hr routinely. The procedure is simple, needs no special equipment and requires only 2 or 3 days for cell growth. 相似文献
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