排序方式: 共有13条查询结果,搜索用时 15 毫秒
1.
2.
M. Nali B. Rindone S. Tollari V. Andreoni V. Treccani 《Cellular and molecular life sciences : CMLS》1985,41(10):1351-1353
Summary Caffeic, ferulic and synapic acid are anaerobically degraded by a microbial consortium via the reduction of the double bond of the side chain, the replacement of the nuclear hydroxyl group in position 4 by hydrogen, the demolition of the side chain by the loss of a C1 unit. 相似文献
3.
V. Bocci M. Muscettola G. Grasso Zs. Magyar A. Naldini G. Szabo 《Cellular and molecular life sciences : CMLS》1986,42(4):432-433
Summary When human recombinant interferon-2 diluted in saline was injected s.c. into rabbits, the total amount recovered in thoracic lymph was less than 0.4%. Recoveries increased from 2- to 8-fold if interferon was injected in 4% albumin or with hyaluronidase, respectively. Albumin added to interferon acts as an interstitial fluid expander, thus favoring interferon absorption through lymphatics rather than blood capillaries. This strategy may increase the therapeutic index of interferon.This work was supported by Ministero Pubblica Istruzione and Progetto Finalizzato Oncologia, contract No. 84.00461.44, CNR, Roma. 相似文献
4.
PPARs: transcriptional effectors of fatty acids and their derivatives 总被引:19,自引:0,他引:19
5.
6.
7.
植物组织培养中的pH值 总被引:6,自引:0,他引:6
在植物组织培养中 ,对于影响细胞分裂分化的 p H因子 ,人们对其真正的影响未引起足够的重视 .结合文献并通过实验发现 :环境 p H值对胞质 p H值、质膜透性、植物激素作用、生理代谢及培养物的生长和分化都存在不同程度影响 ,是植物组织培养中应加以重视的影响因子 . 相似文献
8.
HUANGSheng BAIXueliang MAQingsheng TANGXianlai WUBo 《科学通报(英文版)》2004,49(21):2262-2265
Sinorhizobium fredii strain HN01 can use proline as the sole carbon and nitrogen source. A mutant strain GXHN100 unable to catabolize proline was screened from 6000 Tn5gusA5 random insertional mutants of S.fredii strain HN01. Sequencing analysis showed that an open reading frame, named pmrA (proline metabolic relative), was inserted by the Tn5gusA5. A positive clone, namedp GXHN100 which containing 3.3kb foreign DNA fragment of S.fredii strain HN01, was isolated from a partial gene library of S.fredii HN01 by colony in situ hybridization. Sequence analysis showed that pGXHN100 contained the entire pmrA gene. The 3.3kb DNA fragment of pGXHN100 was cloned into a broad-host-range cosmid vector pLAFR3 to form plasmid pGXHN200 which was subsequently introduced into GXHN100 to form a complemented strain GXHN200. Plant test showed that GXHN100 was effective and no obvious changes in nitrogenase activity comparing with parental strain. But GXHN100 nodulated 2 days later on soybean and its nodulation efficiency and competitiveness were decreased.The complemented strain GXHN200 restored the nodulation efficiency and competitiveness of GXHN100 to the wild type. 相似文献
9.
孙金梅 《西南民族学院学报(自然科学版)》1998,24(3):326-331
综述了猪体脂肪组织离体合成代谢和分解代谢的研究概况以及其它物种离体脂肪组织代谢调节的一些研究进展.特别注重胰岛素、肾上腺素等激素对脂肪组织合成及分解代谢的调节作用. 相似文献
10.
Intensified adenosine triphosphate (ATP) degradation following therapeutic hyperthermia is often observed in solid tumors. As a result, accumulation of purine catabolites can be expected together with formation of protons at several stages during degradation to the final product, uric acid. Proton formation in turn can contribute to the development of heat-induced acidosis. Furthermore, oxidation of hypoxanthine and xanthine may result in generation of reactive oxygen species, which may lead to DNA damage, lipid peroxidation and protein denaturation, thus also contributing to heat-induced cytotoxicity. In hyperthermia experiments a tumor-size-dependent, significant increase in the levels of the following catabolites has been demonstrated: [IMP+GMP] (sum of guanosine and inosine monophosphate levels), inosine, hypoxanthine, xanthine and uric acid, along with a drop in ATP and guanosine triphosphate (GTP) levels. These data suggest that formation of reactive oxygen species and protons during purine degradation may indeed play a significant role in the antitumor effect of hyperthermia. 相似文献