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glass filter
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  玻璃滤器
     The isolate showed small size and pleomorpHic shape under microscope, in addition to filterability through G5-6# glass filter.
     菌体呈多形,能通过G5-6号玻璃滤器,对毛地黄皂苷不敏感,能发酵葡萄糖,不分解精氨酸和尿素。
短句来源
  玻璃过滤器
     The thesis adopts solidified Aminophosphonic acid resin glass filter to separate and concentrate the four kinds of elements like Cu, Pb,Cd and Hg in surface water and seawater, then measures Cu, Zn and Cd by GFAAS, measures Hg by AFS, and gets satisfying results respectively.
     本文采用固化了胺基膦酸树脂的玻璃过滤器,分离与富集地面水、海水中 Cu、pb、Cd、Hg等四种元素,用石墨炉原子吸收分光光度计测定Cu、Zn和Cd,用原子荧光光度计测定Hg,均取得了满意的结果。
短句来源
  “glass filter”译为未确定词的双语例句
     The ambient methanesulfonic acid (MSA)sampling method is established using glass filter and KB-120 aerosol collector;
     建立了以玻璃纤维膜-KB120气溶胶采样器采集大气中甲磺酸的采样方法;
短句来源
     Application of Fiber Glass Filter Materials Made in Our Country for Pulse Jet Bag Filter at Cement Kiln Inlet
     国产玻纤滤料在水泥窑尾脉喷袋式除尘器上的应用
短句来源
     Study on Characteristics of Glass Filter Media
     玻璃纤维膜过滤特性研究
短句来源
     In order to stop the visible light to shine the wheel band, we add a glass filter in front of the ultraviolet source, which can filter effectively smaller than the 300nm harmful ultraviolet ray and bigger than 420nm the useless visible light, also has the high transmissibility to the spectrum power more centralized 365nm ultraviolet light.
     为了尽量杜绝可见光照射到轮箍上,在紫外光源前加了一块滤光玻璃,其对波长小于300nm的有害紫外线及大于420nm的无用可见光都起到良好的截止作用,对谱功率较为集中的365nm紫外光线也具有较高的透过率,有效的提高了整个系统的精确度和灵敏度。
短句来源
     A microwave oven is used for drying the BaSO4 precipitate which has been filtered off on a sintered glass filter crucible.
     采用玻璃砂芯坩埚过滤BaSO_4沉淀,微波炉代替马弗炉恒重坩埚、沉淀,重量法测定了矿石中的硫。
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  相似匹配句对
     On the Filter
     关于共轭滤波器
短句来源
     Filter Glass for Spectroradiometry, Photometry and Colorimetry
     光谱、光度、色度计量用玻璃的研究
短句来源
     Study on Characteristics of Glass Filter Media
     玻璃纤维膜过滤特性研究
短句来源
     ART Glass
     艺术玻璃 艺术人生
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     Glass Boxes
     玻璃盒子
短句来源
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  glass filter
After 10 days, filtrates were obtained and sterilized by filtration through sintered-glass filter.
      
However, particular attention must be paid to potential constitutive Zn release by the sintered glass filter holders, the effect of which can be reduced by rigorous acid washing prior to and following every use.
      
The irradiated solution was separated from the bulk solution by a glass filter serving as a diffusion barrier.
      
The multicomponent solution is filtered through a G-5 glass filter under conditions of reduced adsorption.
      
Substrates such as nylon mesh seeded with fibroblasts, Full Thickness Skin?, or 5-μm polycarbonate filter also supported hair growth, whereas Gelfilm, GF-A glass filter, filter paper, or 1-μm polycarbonate filter did not.
      
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Experiments have shown that the probe electrodes for the direct current measurement of conductance can be improved in the following way. Fritted glass filter-sticks filled with KCl solutions and fitted with Ag-AgCl electrodes were used as the probe electrodes, instead of the liquid junction electrodes suggested by Elias and Schiff. These electrodes were found to be satisfactory for both aqueous and mixed H_2O-dioxan solutions, diffusion being neglegible, and they can be used many times in succession without...

Experiments have shown that the probe electrodes for the direct current measurement of conductance can be improved in the following way. Fritted glass filter-sticks filled with KCl solutions and fitted with Ag-AgCl electrodes were used as the probe electrodes, instead of the liquid junction electrodes suggested by Elias and Schiff. These electrodes were found to be satisfactory for both aqueous and mixed H_2O-dioxan solutions, diffusion being neglegible, and they can be used many times in succession without deterioration.

实驗証明,用濾棒裝成的探針电极测量电解質溶液的导电度是合用的。从它所测得的几种电解質在混合溶剂中的导电度与精密的交流电法所测得的值很接近。这种电极一經装成后可反复使用,而且在测量过程中几无扩散效应。

Chloroplasts, prepared from fresh, prechilled spinach leaves by the method of Jagendorf andAvron, were suspended in Tris buffer (25 μmoles, pH 8.4) containing MgCl_2 (6 μmoles), ADP(3 μmoles), P~(32)-labelled phosphate (3 μmoles), NaCl (25 μmoles) and the different cofactors. Totalvolume of the reaction mixture was 1.25 ml, containing 30-40 μg chlorophyll. Preliminary experi-ments showed that at the low illumination intensity for quantum yield determinations the optimal quan-ties of the co-factors were: PMS...

Chloroplasts, prepared from fresh, prechilled spinach leaves by the method of Jagendorf andAvron, were suspended in Tris buffer (25 μmoles, pH 8.4) containing MgCl_2 (6 μmoles), ADP(3 μmoles), P~(32)-labelled phosphate (3 μmoles), NaCl (25 μmoles) and the different cofactors. Totalvolume of the reaction mixture was 1.25 ml, containing 30-40 μg chlorophyll. Preliminary experi-ments showed that at the low illumination intensity for quantum yield determinations the optimal quan-ties of the co-factors were: PMS or FMN, 0.005 μmole, vitamin K_3, 0.03 μmole, and of the Hilloxidants were: K_3Fe(CN)_6 0.6 μmole, TPN 0.2 μmole. Neon tube with dilute ammoniacal CuSO_4 solution and red-glass filters was used as light source.The wave length range was 620-660 mμ and the intensity was 6-8×10~3 ergs/cm~2/sec. Energydeterminations were made with a blackened constantin-copper thermopile, the absolute energy wascalibrated by the amount of heat produced electrically at the surface of the thermopile. The calcu-lated number of quanta was counter-checked by chlorophyllide actinometer according to Warburg.Light scattering was corrected by the ground glass method of Shibata. Phosphorylation rates weremeasured by ATP~(32) formed according to the method of Nielsen and Lehninger. No incorporation of P~32 was detectable in the dark. To avoid loss of activity preparations were conducted near 0℃ and experiments were completedwithin 10 minutes including isolation of chloroplasts. Representative results are given in Tab. 1. The following conclusions can be drawn. (1) The quantum requirement of cyclic photophosphorylation is between 2.9-6.5 (generally4-5) per molecule of ATP formed, irrespective of the co-factors used,. Although at high lightintensities PMS can be twice as active as vitamin K_3 or FMN, their quantum yields are the same. (2) Same numerical results are obtained with heat deproteinized leaf extract in place of co-factors. (Tab. 3). (3) Non-cyclic photophosphorylation with K_3Fe(CN)_6 or with TPN shows the same quantumrequirement of 4-6. (Tab.1). Apparently one and the same electron transport system is involvedin both types of phosphorylation and there exists probably only one phosphorylation site. However,the possibility of a second easily inactivated site is not excluded. (4) The simultaneously measured Hill reaction requires 9-12 quanta per molecule of O_2evolved with or without photophosphorylation (+ or -ADP, Tab.2). The result corroboratesthose of other workers. It further shows that under the conditions of the present experiment cou-pling is complete (P/2e = 1), and that no extra quantum is needed for the coupled formation ofATP. (5) The quantum requirement of both cyclic and noncyclic phosphorylation increased withdecreasing light intensity within the range used (1.3-6.0×103 ergs/cm~2/sec.) (Tab. 4), whereasthat of O_2 production by the Hill reaction remains constant, thus resulting in a progressive uncou-pling of phosphorylation from the electron transport chain. The relationship between the present results and the quantum requirement of photosyntheticCO_2-reduction is discussed. That at low intensities of illumination used in the present experimentsthe number of quanta required for 2 TPNH and 2 ATP formation equals to that of photosynthesisunder these conditions (~compensation point) indicated that cyclic production of ATP is perhapsnot involved and the extra ATP needed for CO_2-reduction in the Calvin cycle must come fromsome other source, e.g. respiration. That at higher light intensities (several times compensationpoint) the quantum requirement of photosynthesis increases is probably due to the coming into playof the photochemically inefficient cyclic photophosphorylation.

用菠菜叶绿体悬浮液,在红光下(620—660mμ,6—8×10~3尔格/厘米~2-秒)测定同位素P~(32)标记的无机磷酸进入ATP的强度,并根据吸收的光能量换算为形成一个分子ATP所需要的红光量子数。结果指出: (1)循环光合磷酸化作用,不论用何种辅助因素(PMS,维生素K_3,FMN),形成一个分子ATP的量子需要量均在4—5之间(最低一次获得2.9)。叶提取液代替辅助因素,结果亦同。(2)与希尔反应偶联的光合磷酸化作用(希尔氧化剂为K_3Fe(CN)_6或TPN)的量子需要量亦是4—6。同时测定的还原作用指出希尔反应中每放出一个分子O_2,需要8—12个红光量子,表示在试验条件下,二者是完全偶联的(P/2e?1)。没有磷酸化(不加ADP及P_i)时,希尔反应的量子需要量不变,表示偶联的ATP形成不需额外的光量子。(3)光强度减低,则循环与非循环光合磷酸化作用的效率随之降低,量子需要量增加,而希尔反应的效率则不变。从上述结果推论,两种光合磷酸化作用均是通过同一的电子传递系统,在此系统中仅有一个磷酸化部位,除非另有一个部位是极易破坏的。试验结果也对光合作用的量子需要量问题,供给可能的解释。在弱光下光合作用效...

用菠菜叶绿体悬浮液,在红光下(620—660mμ,6—8×10~3尔格/厘米~2-秒)测定同位素P~(32)标记的无机磷酸进入ATP的强度,并根据吸收的光能量换算为形成一个分子ATP所需要的红光量子数。结果指出: (1)循环光合磷酸化作用,不论用何种辅助因素(PMS,维生素K_3,FMN),形成一个分子ATP的量子需要量均在4—5之间(最低一次获得2.9)。叶提取液代替辅助因素,结果亦同。(2)与希尔反应偶联的光合磷酸化作用(希尔氧化剂为K_3Fe(CN)_6或TPN)的量子需要量亦是4—6。同时测定的还原作用指出希尔反应中每放出一个分子O_2,需要8—12个红光量子,表示在试验条件下,二者是完全偶联的(P/2e?1)。没有磷酸化(不加ADP及P_i)时,希尔反应的量子需要量不变,表示偶联的ATP形成不需额外的光量子。(3)光强度减低,则循环与非循环光合磷酸化作用的效率随之降低,量子需要量增加,而希尔反应的效率则不变。从上述结果推论,两种光合磷酸化作用均是通过同一的电子传递系统,在此系统中仅有一个磷酸化部位,除非另有一个部位是极易破坏的。试验结果也对光合作用的量子需要量问题,供给可能的解释。在弱光下光合作用效率高,可能是由于部份ATP来自呼吸;而在强光下效率减低,则是呼吸所供给的ATP不足而必需依靠循环光合磷酸化所致。

Paris' method for the determination of anthraquinone content of plant drug has been studied. Through the analysis of several drugs, including Rheum palmatum L., Cassia tora L., and Polygonum multiflorum Thunb., more favorable analytical conditions were established; the free and combined anthtaqiiinone contents of a plant drug could thus be determined as follows: Free anthraquinones: 0.1—l.0g finely powdered sample is accurately weighed and extracted with chloroform in a Soxhlet apparatus. The chloroform extract...

Paris' method for the determination of anthraquinone content of plant drug has been studied. Through the analysis of several drugs, including Rheum palmatum L., Cassia tora L., and Polygonum multiflorum Thunb., more favorable analytical conditions were established; the free and combined anthtaqiiinone contents of a plant drug could thus be determined as follows: Free anthraquinones: 0.1—l.0g finely powdered sample is accurately weighed and extracted with chloroform in a Soxhlet apparatus. The chloroform extract is shaken with successive portions of 5% sodium hydroxide-2% ammonia mixture in a separatory funnel until the alkali solution is colourless. The alkali extracts are combined and diluted to a certain volume. If the solution becomes turbid, it is filtered through a sintered glass filter and the filtrate collected for colorimetric determination in a photometer with a 490 mμ filter. The result is calculated from a calibration curve obtained with 1,8-dihydroxyanthraquinone. The extraction with the mixed alkali solution and the colorimetric measurements must be done in a shaded room to prevent the decomposition of the coloured solution by light. Combined anthraquinones: 0.05—0.1g finely powdered sample is accurately weighed and placed in a 100 ml conical flask, 30 ml of 5 N sulphuric acid are added, and the mixture is refluxed for two hours to hydrolyse the combined anthraquinones. The flask is cooled, then refluxed with 30 ml chloroform for one hour. The latter is removed with a dropper, replaced by a fresh portion of 20 ml chloroform and refluxed for 20 minutes. This extraction process is repeated until anthraquinones are exhausted. The chloroform extracts are combined, washed with small portions of distilled water, extracted with the mixed alkali solution as above, and determined colorimetrically. This gives the total anthraquinone content, from which is subtracted the amount of free anthraquinones in order to get the percentage of combined anthraquinones.

本文在Paris等人所报导方法的基础上,研究了蒽醌显色后的稳定性情况,以及用酸水解结合蒽醌与提取的条件,进而分析了几种植物药中游离蒽醌与结合蒽醌的含量,认为方法尚可应用.游离蒽醌系将生药样品在Soxhlet提取器内用氯仿提取,提取液用5%NaOH-2%NH_40H提取后比色,以1,8-二羟蒽醌为标准;结合蒽醌则先用5N硫酸水解,回流2小时,再加氯仿回流提取数次,至提尽为止,合并氯仿液,同上以碱液提取后比色测定.

 
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