ph-value 中文意思是什麼

ph-value 解釋
氫離子濃度負對數值
  • ph : PH ＝public health 公共衛生。【化學】表示氫離子濃度的倒數的對數的符號。
  • value : n 1 價值；重要性；益處。2 估價，評價。3 價格，所值；交換力。4 （郵票的）面值。5 等值；值得花的代...
  1. It is white crystal powder, odorless and slightly bitter ; hardly soluble in ethanol, chloroform, aether and benzene and soluble in solutions whose ph value is less or more than 7

    本品在水中易溶，在乙醇、丙酮、氯仿或乙醚中幾乎不溶。本品為兩性化合物，能溶於酸性溶液或堿性溶液。
  2. Dithiocyanomethane is an efficient, broad - spectrum germicide and algaecide, displaying strong exterminating effects against germs, fungus and algae existing in circulating water. it maintains long - term effects and is applicable to broad ph value and temperature ranges

    二硫氰基甲烷是一種高效廣譜的殺菌滅藻劑，對于循環水中存在的主要細菌真菌和藻類都具有高效的殺滅效果，而且藥效維持時間長，適應的ph值和溫度范圍較寬。
  3. The results suggested that the ph value, the type of monomers, the type, concentration and surface properties of inorganic nanoparticles, the type and concentration of emulsifier have a great influence on the encapsulating emulsion polymerization and the obtained latex stability. if selecting cationic emulsifier ( ctab ), low water soluble monomers ( such as ba, st ) and hydrophobic nano - silica, the inorganic nanoparticles would be encapsulated by polymers through ultrasonic irradiation successfully under alkalescent condition

    系統研究了ba 、甲基丙烯酸甲酯（ mmal苯乙烯舊t ）以及它們的共聚體系在超聲輻照作用下包裹聚合的主要影響因素，結果表明： ph值、單體的種類、無機納米粒子的種類、濃度及表面性能、乳化劑的種類及濃度等對超聲輻照包裹乳液聚合以及復合體系的穩定性有較大的影響。
  4. Ammonium nitrate - method for measurement of ph value

    硝酸銨.第3部分: ph值測定方法
  5. Measurement of ph value of clear aqueous solutions

    透明含水溶液的ph值測量
  6. The changes in molecular weight, mass, mechanical strength, microstructure of fibers and ph value of the buffer solution with time in vitro had been studied. the study shows that degradation mechanism of pdlla / ha compound fiber was indicative of an autocatalysis process and simple noumenon hydrolysis

    通過對試樣的性能測試和形貌觀察，研究了pdlla ha復合纖維在降解過程中其分子量、重量和力學性能以及緩沖溶液ph值等一系列參數的變化規律，並探討了復合纖維的降解機理。
  7. In the synthesizing process, the ph value in hydroxymethylated stage, the reaction time, temperature and the moore ratio of sodium bisulfate to melamine in the sulfonated stage, and die ph value in the condensation stage, are important factors influencing on the performance of jd

    在合成過程中，羥甲基化階段的ph值，磺化階段的ph值、時間、溫度和投料摩爾比，縮合階段的ph值等對減水劑性能影響顯著。
  8. The first consideration in selecting a buffer is ph value.

    在選擇緩沖劑時第一考慮是它的pH值。
  9. Calomel electrodes for the measurement of ph value

    Ph值測定用甘汞電極
  10. Polymerization of al - catechin complexes may reduce aluminum absorption in intestine. f " can compete a13 + with catechins in solution, and its ability become stronger with decreasing of ph value

    氟能夠與兒茶素竟爭性的與a廣絡合，在較低的ph值時，氟的競爭性增強。
  11. When ph value < 0. 5, faster deposition rate, faster growth rate of crystallizing nucleus, which causes bigger crystalline granularity and bad surface quality of the deposits such as crassitude or darkling

    Ph 0 . 5時，沉積速度過快，晶核成長速度快，晶粒粒度較大，鍍層表面粗糙、發黑，表面質量差。
  12. The factors influencing on the performance of ash - jd such as the moore ratio of monomers, the reaction temperature and time, concentration, the ph value of reaction solution and the drippy speed of formaldehyde were studied carefully. through experiments, the optimum level of those factors was gained

    論文詳細研究了反應單體的摩爾比、反應溫度、時間、濃度、反應溶液的酸堿度及甲醛的滴加速度等對產品ash - jd性能的影響，通過試驗，得到了這些因素的最佳水平。
  13. Soil caco3 eluviation - illuviation is a relatively complicate process, soil co2 is one of the important effect factors, which influences soil caco3 through controlling soil ph value and caco3 solution capability

    土壤碳酸鈣淋溶淀積是一個復雜的過程，土壤中的co _ 2通過控制土壤ph值和碳酸鈣的溶解性來影響土壤碳酸鈣的淀積，是重要的影響因子之一。
  14. It is shown that the effect of pac removing fluoride is closely related to ph value and the optimum range of ph value is between 6. 1 ? 7. 1. under this condition, further studies are made on the optimum coagulant dosage, mixing time, artificial turbidity, filtration rate and filter bed ' s depth and the optimum range of these parameters have been determined

    堿式氯化鋁的除氟能力與原水的ph值有密切的關系，除氟最佳ph值范圍為6 . 1 ? 7 . 1 。在此條件下，進一步對最佳投藥量、混合時間、反應時間、人工輔助投加濁度、濾速及濾層厚度進行了研究，確定了其最優的取值。
  15. Increasing the formaldehyde dosage and ph value or decreasing nh4oh dosage can shorten the gestating time, but the stability of the bath was declined

    提高甲醛用量和ph值，降低氨水用量均可縮短孕育期，同時使鍍液穩定性下降。
  16. Hi this thesis, the setting time of various retarders had been tested, in which three retarders with good retarding action, citric acid, sodium tripolyphosphate, bone glue are respectively chosen from three types of retarders, hydroxyl carboxylic acid type, phosphate type and protein type, and the strength and setting time of gypsum added with them are determined. effect of some factors, such as ph value, fineness of hemihydrate, type of gypsum on the retarding action of the retarders is also studied

    本文對多種緩凝劑進行凝結時間測試，選擇效果良好的羥基羧酸、無機鹽和蛋白質類型的三種緩凝劑：檸檬酸、多聚磷酸鈉和骨膠，測定它們對石膏凝結時間、強度等宏觀性能的影響，並分別研究ph值、石膏細度和石膏種類等因素對它們的緩凝效果的影響。
  17. The weight gain of powders could be slightly increased with the increasing ph value, formaldehyde dosage and powder loadage, but the most utilization ratio of silver was only 35. 2 percent. the composite powders with the silver content between 13 % ~ 70 % were produced

    盡管提高ph值、甲醛量及粉體的裝載量能在一定程度上增加化學鍍后粉體增重即銀的析出量，但遠低於理論析出值，銀的最大利用率僅為35 . 2 。
  18. The influence of ph value of electrolyte on open circuit photovoltage and short circuit photocurrent is very significant

    電解液的ph值對電池的開路電壓和短路電流也有較大的影響。
  19. In this thesis, aragonite whisker was synthesized by introducing co2 into ca ( oh ) 2 suspension mixed with mgcl2. the hyphenated technique of microscope - microcomputer was used to examine the morphology and microstructure of the products. the effects of reaction temperature, concentration of mgcl2, ph value of the initial suspension, flow velocity of co2, and stirring strength on the formation of the polymorphs of calcium carbonate were examined

    本文利用改進的碳化法制備了文石相碳酸鈣晶須，採用高倍顯微鏡一計算機聯用技術、掃描電鏡和x射線衍射儀進行產品形貌觀察和晶型分析，討論了溫度、 mgcl _ 2濃度、初始ph值、 co _ 2的流速、攪拌速度等因素對制備文石相碳酸鈣晶須的影響。
  20. Corrosion behavior of carbon steel in high - ph value uranyl nitrate solution

    值的硝酸鈾酰溶液中碳鋼腐蝕與沉積膜的特性
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