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51.
P/O比是指当一对电子通过呼吸链传至氧所产生的ATP分子数。随着电子传递链和氧化磷酸化作用机制研究的不断深入,P/O比是非整数已被普遍接受,而且P/O比因物种的不同而有所变化。 相似文献
52.
王先菊 《湘潭师范学院学报(社会科学版)》1998,(6)
在H．C．Berg提出的Randomwalk模型的基础上对这个模型进行扩展,提出了GeneralRandomWalk模型,把这个动力学模型用于实际的DNA复制过程中,说明正常和非正常生理环境下ATP酶沿着一维键作位移运动的区别,从理论上对染色体的异常复制作出了解释。 相似文献
53.
陈嵘 《北京体育大学学报》2000,23(4):488-489
观察丹参对运动负荷后小鼠心肌 ATP含量的影响。实验结果表明 :通过注射丹参 ,小鼠心肌在有氧系统供应充足的情况下 ,ATP值有所提高 ,即注射丹参运动组比无注射组有显著提高。这说明丹参对改善训练者的能量代谢 ,从而提高运动能力 ,缓解运动时疲劳的产生有着积极作用 相似文献
54.
目的:探讨不同强度耐力运动训练对大鼠心肌ATP敏感性钾通道表达的影响。方法:40只雄性SD大鼠,随机分为对照组、大强度组、中强度组和小强度组。建立大鼠运动模型,采用RT-PCR技术与Western blot技术,检测大鼠心肌KATP各亚基的表达。结果:RT-PCR结果显示,大强度组和中等强度组Kir6.1的基因表达明显高于对照组;大强度组、中等强度组及小强度组Kir6.2的基因表达显著高于对照组;大强度组、中等强度组及小强度组SUR2的基因表达均显著高于对照组;在大鼠心肌组织中未能检测到SUR1的基因表达。Western blot结果与PCR结果基本相同,但小强度组Kir6.1蛋白表达也明显高于对照组。结论:各种强度的长期耐力运动训练可增加KATP的表达。 相似文献
55.
Wei-dong Guo Jun Liang Xiao-e Yang Yue-en Chao Ying Feng 《Journal of Zhejiang University. Science. B》2009,10(4):251-257
We studied the responses of the activities of adenosine-triphosphate (ATP) sulfurylase (ATPS) and serine acetyltransferase
(SAT) to cadmium (Cd) levels and treatment time in hyperaccumulating ecotype (HE) Sedum alfredii Hance, as compared with its non-hyperaccumulating ecotype (NHE). The results show that plant growth was inhibited in NHE
but promoted in HE when exposed to high Cd level. Cd concentrations in leaves and shoots rapidly increased in HE rather than
in NHE, and they became much higher in HE than in NHE along with increasing treatment time and Cd supply levels. ATPS activity
was higher in HE than in NHE in all Cd treatments, and increased with increasing Cd supply levels in both HE and NHE when
exposed to Cd treatment within 8 h. However, a marked difference of ATPS activity between HE and NHE was found with Cd treatment
for 168 h, where ATPS activity increased in HE but decreased in NHE. Similarly, SAT activity was higher in HE than in NHE
at all Cd treatments, but was more sensitive in NHE than in HE. Both ATPS and SAT activities in NHE leaves tended to decrease
with increasing treatment time after 8 h at all Cd levels. The results reveal the different responses in sulfur assimilation
enzymes and Cd accumulation between HE and NHE. With increasing Cd stress, the activities of sulfur assimilation enzymes (ATPS
and SAT) were induced in HE, which may contribute to Cd accumulation in the hyperaccumulator Sedum alfredii Hance.
Project supported by the National Natural Science Foundation of China (No. 30630046) and the Hi-Tech Research and Development
Program (863) of China (No. 2006AA06Z386), and the Program for Changjiang Scholars and Innovative Research Team in University,
China (No. IRT0536) 相似文献
56.
目的：通过给训练小鼠灌服蜂胶,观察蜂胶对小鼠红细胞ATP酶活性的影响。方法：小鼠随机分为三组,训练组和训练＋蜂胶组进行四周递增强度的游泳训练,每周游泳6天。结果：（1）训练组与对照组相比,红细胞Na^＋-K^＋-ATP酶Ca^2＋-Mg^2＋-ATP酶活性显著降低,血浆MDA含量显著增高;（2）训练＋蜂胶组小鼠ATP酶活性显著高于训练组,血浆MDA含量显著降低。结论：蜂胶可以明显提高小鼠运动后Na^＋-K^＋-ATP酶、Ca^2＋-Mg^2＋-ATP酶活性,此作用与蜂胶的抗氧化作用有关。 相似文献
57.
大强度训练对骨骼肌ATP／CP代谢的影响 总被引：1，自引：0，他引：1
从代谢关键酶和代谢底物两方面综述了大强度训练对ATP/CP代谢的影响。大强度训练对CK活性的影响存在着争议,但高水平的运动员能够更快地动用CP;大强度训练在一定程度上可以提高MK活性;大强度训练对肌凝蛋白Ca2 -ATP酶活性的影响不确定,多数学者认为不会改变其安静时水平,但会影响运动时所能达到的最大ATP酶活性。大强度运动时,几乎所有类型肌纤维中的CP都参与供能,而ATP供能主要发生在Ⅱ型肌纤维。大强度训练对安静时ATP/CP含量影响不大,但是非常大强度、大运动量的训练可能会引起ATP少许减少;运动训练可以增加线粒体ATP生成速率;大强度运动中TAN代谢与肌纤维类型有关,主要发生在Ⅱ型肌纤维。 相似文献
58.
Strategic research partnerships (SRPs) have become a salient feature of the US National Innovation System. We provide an overview of SRPs and examine the antecedents and consequences of centerpiece legislation designed to stimulate the formation of SRPs: the National Cooperative Research Act (NCRA) of 1984. NCRA allows firms to disclose their research joint ventures (RJVs) to the Department of Justice, which enabled them to significantly reduce their exposure to antitrust litigation. We estimate an econometric model of trends in RJV filings and find that, as intended by the legislation, the propensity of firms to engage in RJVs is sensitive to changes in the global competitiveness of US high-technology industries. More importantly, our results suggest that the establishment of the Commerce Department’s Advanced Technology Program, which provides financial support to firms that engage in collaborative research projects, induced firms to engage in additional (privately financed) RJVs. This is a spillover mechanism that warrants further attention as national innovation systems evolve. 相似文献
59.
陈红 《浙江大学学报(A卷英文版)》2004,5(6):727-732
Specific ATP content of volatile solids was measured to characterize the sludge activity in a sequential anaerobic/aerobic wastewater treatment system, with an upflow anaerobic sludge blanket (UASB) reactor and a three-phase aerobic fluidized bed (AFB) reactor. The wastewater COD level was 2000(3000 mg/L in simulation of real textile wastewater. The ATP content and the specific ATP contents of volatile solids at different heights of the UASB reactor and those of the suspended and immobilized biomass in the AFB reactor were measured. In the UASB reactor, the maximum value of specific ATP (0.85 mg ATP/g VS) was obtained at a hydraulic retention time (HRT) 7.14 h in the blanket solution. In the AFB reactor, the specific ATP content of suspended biomass was higher than that of immobilized biomass and increased with hydraulic retention time reaching a maximum value of 1.6 mg ATP/g VS at hydraulic retention time 4.35 h. The ATP content of anaerobes in the UASB effluent declined rapidly under aerobic conditions following a 2nd-order kinetic model. 相似文献
60.
经１０ｄ中药制剂灌喂后,小鼠在力竭运动后ＭＤＡ、ＡＴＰ及ＧＳＨ的恢复明显加快。其中大剂量组的恢复效果更好。实验表明,中药制剂不仅是良好的抗氧剂,也具有良好的促恢复作用 相似文献