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     Addition of L18 (10~(-10) mol/L) and/or L60 (10~(-10)mol/L) could obviously restrain the expression of bcl-2mRNA boosted by G-17 or CCK-8S.
     同时加入L18和 /或L60 ( 1× 10 -10 mol/L)可明显抑制G 17和CCK 8S对bcl 2mRNA的促表达作用。
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     Effects of H_2S on HDS Reaction of Dibenzothiophene and 4,6-Dimethyl-dibenzothiophene over NiW/Al_2O_3 and CoMo/Al_2O_3 Catalysts
     H_2S对NiW/Al_2O_3和CoMo/Al_2O_3上二苯并噻吩和4,6-二甲基二苯并噻吩加氢脱硫反应的影响
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     The Effect of H_2S on SCC for 1Cr18Ni9Ti in NaCl Solution
     H_2S对1Cr18Ni9Ti在NaCl溶液中应力腐蚀的影响
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     The Effect of Cu_2S Addition on the Superconductivity of Bi-Pb-Sr-Ca-Cu-O System
     添加Cu_2S对 Bi-Pb-Sr-Ca-Cu-O体系超导性的影响(英文)
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     Addition of L60 (10~(-8)mo l/L) or L18 (10~(-8)mol/L) could obv iously restrain the expression of bcl-2 protein boosted by G-17 and CCK-8S.
     L60或L18( 1× 10 -8mol/L)能明显抑制G 17和CCK 8S对bcl 2蛋白表达的促进作用。
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     The traditional technologies to produce C.
     C .
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     Based on the analysis of G.
     在G.
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     The calculation of acoustic field and power radiated by an electrical machine is considered in this paper as an extension of S.J.
     本文是 S.J.
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     S.
     通过S.
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Our experimental results clearly show that the slow breakdown of ascorbic acid during its separation on a paper partition chromatogram is mainly due to the presence of oxygen and such destruction may be completely prevented upon removal of the latter. A quantitative procedure employing filter paper-partition chromatography is described for the determination of ascorbic acid in plant and animal tissues, using a mixture of n-butanol and 4% aqueous trichloroacetic acid solution as solvent (4:6, v/v). The chromatogram...

Our experimental results clearly show that the slow breakdown of ascorbic acid during its separation on a paper partition chromatogram is mainly due to the presence of oxygen and such destruction may be completely prevented upon removal of the latter. A quantitative procedure employing filter paper-partition chromatography is described for the determination of ascorbic acid in plant and animal tissues, using a mixture of n-butanol and 4% aqueous trichloroacetic acid solution as solvent (4:6, v/v). The chromatogram is developed in an atmosphere of carbon dioxide with a few per cent of hydrogen sulfide. The average recovery of added ascorbic acid is about 98%. Due to the irregularity in the percentage reduction of dehydroascorbic acid in the chromatographic chamber in the presence of H_2S, the procedure can only be used to determine the total content of ascorbic acid after preliminary reduction of the dehydro-compound.

(一)利用濾紙層析法分離維生素丙時,氧氣是破壞維生素丙的主要因素,防上這種破壞作用的最有效方法是用CO_2把層析室及溶媒中的O_2排出,並加一定量的H_2S。 (二)以正丁醇、三氯醋酸和水(混合四體積的正丁醇和六體積的4%三氯醋酸水溶液)為溶媒,用CO_2把溶媒及層析室中O_2盡量完全排出,並置飽和H_2S水溶液50—100毫升於層析室內,可以完全防止層析分離時維生素丙的破壞。用這種方法測定動植物組織中維生素丙的總合量時,回收率茌98%以上。 (三)層析室中的H_2S對脫氫維生素丙的還原能力不規律,因此不能用這種方法測定樣品中脫氫維生素丙的含量,只能用以測定還原維生素丙的總合量(浸取液先經H_2S處理然後層析)。

Effect of H_2S on the fatigue crack propagation rate of 16MnRe three-point bend specimen has been investigated in this paper. Results inclicate: (1) ln the H_2S corrosive environment, 16MnRe is also in agreementwjth these equations suggestecl by reqerences [1] and [2] for highcycle and low cycle fatigue crack propagation rate; (2) Crack propagationrate of 16MnRe high cycle and low cycle fatigue is increased in theH_2S corrosive environment.

本文研究了H_2S对16MnRe三点弯曲试样疲劳裂纹扩展速率的影响,实验结果表明:(1)在H_2S腐蚀环境下,16Mn Re仍符合文献(1)和(2)提出的高周疲劳和低周疲劳裂纹扩展速率表达式;(2)H_2S明显加速了16MnRe高周疲劳和低周疲劳裂纹扩展速率率,

This paper analyzes the sampling inspection and first order digital loop circuit in rotative velocity detection.It introduces a logic control circuit into the first order digital loop circuit to make the digital character Vs follows frecuency character f_1 closely.A pulse subtraction operated circuit and an automatic conversion feeding circuit are designed. While the coverage factor Dis less than 3, it's proved that the equivalent time constant of the experimental loop circuit can be close to simulated detection.Hence,...

This paper analyzes the sampling inspection and first order digital loop circuit in rotative velocity detection.It introduces a logic control circuit into the first order digital loop circuit to make the digital character Vs follows frecuency character f_1 closely.A pulse subtraction operated circuit and an automatic conversion feeding circuit are designed. While the coverage factor Dis less than 3, it's proved that the equivalent time constant of the experimental loop circuit can be close to simulated detection.Hence, the continuous digital rotative velocity detective device is valuable in practice.

本文分析了采样及一阶数字环路检测转速存在的问题,提出在一阶数字环路中引入逻辑控制电路,可大大加快转速的数字表征量V_s对频率表征量f_1的跟踪。设计了简单可行的脉冲减法运算电路和馈送自动转换电路。通过实验,证明在复盖D<3的范围内,所提实验环路的等效时间常数可接近模拟检测,使数字式转速连续检测装置更为切合实用。

 
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