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active component content     
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  有效成分含量
     Results: The active component content extracted by 70% alcohol was higher.
     结果 :用 70 %乙醇提取的钩藤有效成分含量明显高于水提液。
短句来源
  活性组份含量
     Ag/MgO catalysts with different Ag loading were prepared by impregnation and precipitation methods, and characterized by XRD and CO_2-TPD . Selective synthesis of acrylonitrile from acetonitrile and methanol was carried out in a conventional flow reactor system. The effects of active component content of catalysts and reaction temperatures on the catalytic properties of Ag/MgO were studied.
     分别采用浸渍法和沉淀法制备了不同Ag含量(1%~8%)的Ag/MgO系列催化剂,考察了催化剂的活性组份含量及制备方法、反应温度等因素对乙腈和甲醇选择性合成丙烯腈的影响,并对催化剂进行了XRD和CO2 TPD表征.
短句来源
  活性组分含量
     2. In same preparation condition, influence on active component content on surface area and acid/basic characters has been observed for all catalyst samples. Surface area decreased with increase of active composition content of these samples.
     2.催化剂的活性组分含量对催化剂的表面积和酸碱性质也有一定的影响,在相同的制备条件下,样品的表面积随活性组分含量的增加而减小,对于ZrO_2/γ-Al_2O_3催化剂,ZrO_2的负载使催化剂表面碱量增加。
短句来源
     Influences of active component content and calcinations temperature were investigated.
     考察了活性组分含量和焙烧温度对催化剂活性的影响。
短句来源
     The results provide evidence that when the active component content is less than the threshold of the active component dispersed on the surface of the carrier,it forms a monolayer,but not a close-packed monolayer distribution; above the threshold the crystalline active component appears.
     结果表明,当活性组分含量低于其分散阈值时,它在载体表面呈单层但非密置单层分散,逾此阈值时出现晶相.
短句来源
  活性成分含量
     Effects of Formulation and Technic on the Active Component Content of Rabdosia rubescens
     冬凌草不同剂型及加工工艺对活性成分含量的影响研究
短句来源
     [Objective] To investigate the changes of the key active component content of the prepared cold deposition under different conditions in order to determine the optimum storage time limit of human blood fibrin glue.
     [目的]探讨在不同条件影响下,制备的冷沉淀中关键活性成分含量的变化,以确定纤维蛋白胶的最适保存期。
短句来源
     OBJECTIVE To study the effects of formulation and technic on the active component content of Rabdosia rubescens.
     目的研究冬凌草不同剂型及加工工艺对活性成分含量的影响。
短句来源

 

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      active component content
    The authors show the feasibility of synthesis of polycation forms of zeolites with a low active component content, superior in catalytic activity in cyclohexane dehydrogenation to zeolites containing only an active component.
          


     nickelbase catalyst for partial oxidation of natural gas to synthesis gas was prepared by impregnation method. The influences of its support and active component content on its catalytic activity and physicochemical properties were investigated through experiments of temperatureprogrammed reduction(TPR) and XRD analysis using a fixedbed microreactor. Catalytic performances of the catalyst were different for three different supports. A modified aluminasupported nickel catalyst gave best activity, by using which natural gas conversion of 88.9% and selectivity of 93.4% to carbon monoxide were obtained at 800℃.An excess loading amount of nickel was infavorable for the reaction. With different supports, the dispersions of active component were different, and the interactions between active component and supports were also quite different as well as the reducibilities of the catalyst....

     nickelbase catalyst for partial oxidation of natural gas to synthesis gas was prepared by impregnation method. The influences of its support and active component content on its catalytic activity and physicochemical properties were investigated through experiments of temperatureprogrammed reduction(TPR) and XRD analysis using a fixedbed microreactor. Catalytic performances of the catalyst were different for three different supports. A modified aluminasupported nickel catalyst gave best activity, by using which natural gas conversion of 88.9% and selectivity of 93.4% to carbon monoxide were obtained at 800℃.An excess loading amount of nickel was infavorable for the reaction. With different supports, the dispersions of active component were different, and the interactions between active component and supports were also quite different as well as the reducibilities of the catalyst.

    采用浸渍法制备催化剂,应用固定床流动反应,进行了程序升温还原(TPR)和XRD分析等实验,考察了单载型镍系催化剂活性组份负载量和载体对催化反应活性和物化性质的影响。结果表明,过量的镍担载量对反应是不利的,在α-Al2O3载体上以9%的担载量较好;3种不同的载体上以Al2O3担载镍催化剂活性最好,在800℃反应时可获得88.9%的天然气转化率和93.4%的CO选择性。在实验温度范围内(700~900℃),反应温度越高,催化活性和选择性越好。催化剂随着载体的不同,其中活性组份的分散度不同,与载体的相互作用及还原特性均有较大差别。

    Objective: To investigate the influences of different extraction conditions on the active components of Ramalus uncariae cum uncis, and select an extraction method which could ensure the preparation quality. Methods: The active components of Ramluo uncariae cum uncis extracted by water and by 70%~75% alcohol from the routine proparations were quantitatively compared by TCL scanning. Results: The active component content extracted by 70% alcohol was higher. Conclusion: 70% alcohol extraction is the best...

    Objective: To investigate the influences of different extraction conditions on the active components of Ramalus uncariae cum uncis, and select an extraction method which could ensure the preparation quality. Methods: The active components of Ramluo uncariae cum uncis extracted by water and by 70%~75% alcohol from the routine proparations were quantitatively compared by TCL scanning. Results: The active component content extracted by 70% alcohol was higher. Conclusion: 70% alcohol extraction is the best way of obtaining the highest content of active component of Ramulus uncariae cum uncis. When the active component is extracted by water, it is preferable that the extraction time dosen't longer than half an hour.

    目的 :筛选制定出确保钩藤制剂质量的提取工艺。方法 :用薄层扫描法对钩藤在常规制剂中所用的水煮浓缩法及70 %~ 75 %乙醇提取法提取的钩藤有效成分进行了定量比较。结果 :用 70 %乙醇提取的钩藤有效成分含量明显高于水提液。结论 :浓缩、干燥温度应低于 81°C。

    The active component content of tea was increased by microwave extraction The result shows that the optimum time and temperature are 30s,80~90℃,respectively The optimum rate of tea and water is 1:200 Adding 0 04% β-Cd can keep the flavor,500ppmVc can restrain the drink browning Proper filtrating medium can reduce white turbid in the drink

    采用微波萃取来提高茶叶中有效成分的提取 ,使茶饮料更富有风味和饮用价值 ,结果表明 ,微波辐射萃取生产绿茶饮料的最佳工艺条件 :萃取时间 30s ,温度 80~ 90℃ ,茶 /水比 1∶2 0 0。加入 0 0 4 %的β一CD可很好地保持茶液的风味 ,添加 50 0× 10 - 6Vc可抑制褐变 ,保持茶液的黄绿色 ,选用适当的过滤介质进行精密过滤 ,可减少白浊现象的产生。

     
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