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促进扩散
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  facilitated diffusion
     CONCLUSION The transport mechanism of tanshinonⅡ A in vivo is similar to active transport or facilitated diffusion.
     结论 丹参酮ⅡA 在大鼠胃肠道的吸收存在饱和现象 ,提示丹参酮ⅡA 在机体内的转运机制类似于主动转运或促进扩散
短句来源
     CONCLUSION TA-SLN can improve the absorption of tashinone ⅡA in rat small intestine. The transport mechanism may be active transport or facilitated diffusion.
     结论TA-SLN能够促进丹参酮ⅡA在大鼠小肠的吸收,其转运机制可能为主动转运或促进扩散
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  “促进扩散”译为未确定词的双语例句
     Patching the drug on the skin, the drug molecules permeate through the skin into the subcutaneous capillary vessels by passive, physics and chemical enhancing diffusion.
     经皮给药是将药物贴敷在皮肤外表面,依靠自然扩散、物理和化学促进扩散使药物穿过皮肤进入皮下毛细血管。
短句来源
     The aim of combustion process optimizing is to decrease pre-mixed burn proportion and to improve diffuse combustion .
     整个燃烧过程优化的目标就是减少预混合燃烧,促进扩散燃烧。
短句来源
     These two effects can accelerate diffusion, speedup the solid reaction of additives and Al_2O_3 on the surface of AlN powder. As a result, the sintering temperature was reduced and the sintering was promoted.
     这两种现象都可以促进扩散,加速添加剂与AlN颗粒表面的Al2O3之间的固相反应,从而降低烧结温度,促进烧结。
短句来源
     Diffusion bonding under pulsatile pressure is an ideal bonding method, which can accelerate diffusion, reduce the amount of intermetallic compound and improve its distribution.
     脉冲加压扩散焊能促进扩散过程,减少金属间化合物的形成,改善其分布,是一种较有前景的扩散焊方法。
短句来源
     With the superfine Ni powder and sintering at 1130℃×1h,the final mechanical properties of the driven gears are almost the same as that of parts with the ordinary Ni powder and sintering at 1200℃×2h.
     结果表明,经高能球磨超细化处理后的镍粉可有效地活化烧结,促进扩散均匀化,使从动齿轮的烧结工艺由1200℃保温2h降为1130℃保温1h,而其性能基本不变。
短句来源
  相似匹配句对
     Social Capital Facilitating Technology Innovation Diffusion
     发掘社会资本 促进技术创新扩散
短句来源
     Nonlinear Diffusion
     非线性扩散
短句来源
     promoting rehabilitation.
     促进康复。
短句来源
     A Diffusion-reaction Model for Type I Facilitated Transport in Liquid Surfactant Membaranes
     乳化液膜Ⅰ型促进传递的扩散-反应模型
短句来源
     3) promoting service sectors;
     促进服务业的发展;
短句来源
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  facilitated diffusion
An uphill operating electrogenic Na+-dependent contransport system could be kinetically separated from a Na+-independent facilitated diffusion system.
      
Active high-affinity (Km ~ 3.8 mM; Vmax ~ 15 nmol/[mg·min]) and putative facilitated diffusion low-affinity (Km ~ 140 mM; Vmax ~ 130 nmol/[mg·min]) transport activities were found in C.
      
Active transport and facilitated diffusion seem to play an important role in the intestinal absorption of nickel at concentrations≤10 mg/L.
      
Glucose is a major metabolic fuel in mammals and is transported into organs and cells by a facilitated diffusion which involves binding of glucose to glucose transporters (GLUTs).
      
Myocardial uptake of thallous ion by facilitated diffusion
      
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OBJECTIVE To study the absorption mechanism of tanshinonⅡ A in the roots of Salvia miltiorrhiza Bge. METHODS The model of intestinal absorption was used to determine the concentration of tanshinonⅡ A in rat small intestine, the change of concentration of tanshinonⅡ A was calculated according to mechanism of the Fick equation; the apparent absorption constant ( K a) and half life of absorption ( t 1/2 ) were obtained.RESULTS With the increase of dosage of tanshinonⅡ A , K a decreased...

OBJECTIVE To study the absorption mechanism of tanshinonⅡ A in the roots of Salvia miltiorrhiza Bge. METHODS The model of intestinal absorption was used to determine the concentration of tanshinonⅡ A in rat small intestine, the change of concentration of tanshinonⅡ A was calculated according to mechanism of the Fick equation; the apparent absorption constant ( K a) and half life of absorption ( t 1/2 ) were obtained.RESULTS With the increase of dosage of tanshinonⅡ A , K a decreased and absorption half life t 1/2 (0.6 ~1.0 h) increased gradually.CONCLUSION The transport mechanism of tanshinonⅡ A in vivo is similar to active transport or facilitated diffusion.

目的 研究丹参有效成分丹参酮ⅡA 的吸收机理。方法 采用大鼠在体肠吸收模型 ,以高效液相色谱法测定丹参酮ⅡA 的量 ,根据Fick方程原理对丹参酮ⅡA 含量改变进行拟合 ,求得丹参酮ⅡA 的表观吸收速率常数Ka及吸收半衰期t1/ 2 ,探索丹参酮ⅡA 在小肠的吸收机理。结果 给予不同剂量的丹参酮ⅡA,其吸收速率Ka随浓度的增加而呈微小下降 ,吸收半衰期t1/ 2 延长 ,吸收半衰期约为 0 .6~ 1.0h。结论 丹参酮ⅡA 在大鼠胃肠道的吸收存在饱和现象 ,提示丹参酮ⅡA 在机体内的转运机制类似于主动转运或促进扩散

The strength of welding joint between titanium alloy TA17 and stainless steel 1Cr18Ni9Ti was investigated. Bonded joint was obtained by diffusion bonding at constant temperature and pressure, phase transformation superplastic diffusion bonding and diffusion bonding under pulsatile pressure. The strength of welding joint was tested and metallography of welding joint was observed. The results show that the strength of joints obtained by three diffusion welding are all up to 264 MPa and there are several different...

The strength of welding joint between titanium alloy TA17 and stainless steel 1Cr18Ni9Ti was investigated. Bonded joint was obtained by diffusion bonding at constant temperature and pressure, phase transformation superplastic diffusion bonding and diffusion bonding under pulsatile pressure. The strength of welding joint was tested and metallography of welding joint was observed. The results show that the strength of joints obtained by three diffusion welding are all up to 264 MPa and there are several different layers in the joint. Phase analysis shows that there exist brittle Fe_2Ti and σ -(FeCr) in the titanium alloy-stainless steel joint. Diffusion bonding under pulsatile pressure is an ideal bonding method, which can accelerate diffusion, reduce the amount of intermetallic compound and improve its distribution.

对TA17钛合金与1Cr18Ni9Ti不锈钢的焊接接头强度进行了实验研究。采用恒温恒压扩散焊、相变超塑性扩散焊和脉冲加压扩散焊实现了钛合金和不锈钢的焊接,测试了焊接接头的强度,并对接头进行了金相观察。结果发现:3种接头的强度都达到了264MPa,且接头为多层次的多相组织。物相分析发现钛合金不锈钢接头中存在Fe2Ti和σ (FeCr)两种脆性金属间化合物。脉冲加压扩散焊能促进扩散过程,减少金属间化合物的形成,改善其分布,是一种较有前景的扩散焊方法。

OBJECTIVE To prepare tashinone ⅡA solid lipid nanoparticles(TA-SLN) and investigate its properties and the absorption character in rat intestine in situ. METHODS Solvent emulsification/ evaporation method was used to prepare tashinone ⅡA solid lipid nanoparticles. Its morphology was examined by transmission electron microscope. A HPLC method for the determination of tashinone ⅡA in the nanoparticles and intestinal flux was established. RESULTS The mean diameter of TA-SLN was 119.7 nm .The Zeta potential were...

OBJECTIVE To prepare tashinone ⅡA solid lipid nanoparticles(TA-SLN) and investigate its properties and the absorption character in rat intestine in situ. METHODS Solvent emulsification/ evaporation method was used to prepare tashinone ⅡA solid lipid nanoparticles. Its morphology was examined by transmission electron microscope. A HPLC method for the determination of tashinone ⅡA in the nanoparticles and intestinal flux was established. RESULTS The mean diameter of TA-SLN was 119.7 nm .The Zeta potential were 31.6mV.The drug loading and entrapment efficiency were 3.8% and 87.7% respectively.The result of TA-SLN absorption in small intestinal indicated that Ka was decreased and the absorption t1/2 increased gradually with the increase of dosage. The rat small intestinal absorption of TA-SLN was better than that of tashinone ⅡA solution. CONCLUSION TA-SLN can improve the absorption of tashinone ⅡA in rat small intestine. The transport mechanism may be active transport or facilitated diffusion.

目的制备丹参酮ⅡA固体脂质纳米粒(TA-SLN),并考察其性质及大鼠在体肠吸收特性。方法 以乳化蒸发法制备丹参酮ⅡA固体脂质纳米粒,透射电镜观察其形态,建立测定纳米粒和肠回流液中丹参酮ⅡA的HPLC。结果纳米粒平均粒径为119.7nm,Zeta电位为-31.6mV,载药量为3.8%,包封率为87.7%。肠吸收实验表明,随给药剂量的增加,TA-SLN吸收速率常数Ka呈下降趋势,吸收半衰期t1/2延长,TA-SLN的大鼠小肠吸收优于丹参酮ⅡA溶液。结论TA-SLN能够促进丹参酮ⅡA在大鼠小肠的吸收,其转运机制可能为主动转运或促进扩散

 
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