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  value is
     The content of saturated hydrocarbon is over 70%,and the carbon isotope value is relatively light with δ~(13)C commonly lower than-31‰.
     原油饱和烃含量在70%以上; 碳同位素值偏轻,δ13C值一般小于-31‰;
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     The diffusion coefficients of Nd 3+ and Ho 3+ ions are 1 13×10 -6 cm 2·s -1 (450 ℃) and 2 142×10 -5 cm 2·s -1 (450 ℃) respectively. The measured standard electrode potential of Ho 3+ /Ho is 2 987 V(vs.Cl/Cl -). The reason that the experimental value is more negative than the theoretical one is also discussed.
     其扩散系数分别为:113×10-6和2142×10-5cm2·s-1(450℃),450℃下Ho3+/Ho电极对的标准氧化还原电位为2987V(vs·Cl/Cl-1),并讨论了实验值较理论值偏负的原因。
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     The detection limit of the ELISA method is 4 ng/mL,and the background value is high,when the spiked content is 10 ng/mL,the recovery is 101.0% with relative standard deviation of 8.32%.
     酶联免疫试剂盒测定海水中的氯霉素背景值偏高,在加标浓度为10ng/mL时回收率为101.0%,相对标准偏差为8.32%。
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     (2)As the relation of the overall negative lightning frequency A in the middle area of Guangdong and CAPPI radar echo's intensity is analyzed, find that the highest value of the overall negative lightning frequency A is 30x104. In middle levels (4-16 level), when has stronger echo (12-45dBz), its value is higher.
     (2) 分析广东中部地区雷达回波CAPPI强度和总负闪频次A的关系时,发现总负闪频次A的值最高达30×104次,在中间层4-16层(2-14km)有较强回波强度(12-45dBz)时,总负闪频次A的值偏高;
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     and testing average value is higher between 20℃ and 200℃,deviation is within 10%.
     在20~200℃范围内实测平均值比计算值偏高,误差在10%以内,且随着测定温度升高,测定平均值与计算值的偏差增大,但不同成分测定值与计算值有相近的变化规律。
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  “值偏”译为未确定词的双语例句
     (3) round arches were characteristic by small ⑥ (rθ5- rθ4)R+(rθ5- rθ4)Lvalues;
     (3)圆形牙弓的特征是参数⑥(rθ5-rθ4)R+(rθ5-rθ4)L值偏小;
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     The nitrate from the rainwater has the lowδ 15N values(-1.08%~0.21%) and that from the domestic wastewaters has the highδ 15N values (1.0%~1.7%).
     例如:雨水的δ15N值偏低,为-1.08%~0.21%;
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     Larger stresses are predicted by bimetallic strip model to be -98.4 MPa and 64.6 MPa,respectively.
     双金属片模型的计算值偏大,分别为-98.4MPa和64.6MPa。
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     Compared with the survived group,the number of dysfunction organs,age,APACHEII,PaCO_2,FiO_2,and A-aDO_2 were higher in the succumbed group,while PaO_2,PaO_2/FiO_2,and pH were lower.
     与存活组相比,死亡组功能障碍的器官数目、年龄、APACHEII评分、PaCO_2、FiO_2、A-aDO_2偏高,而氧合指数、PaO_2、pH值偏低。
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     Q-Tcd from X,Y,Z leads (15.7±11.4ms) was smaller than that measured by 12 lead ECG in normal group.
     在正常组由X、Y、Z导联测得的Q-T_(cd)(15.7±11.4ms)比12导联测值偏小。
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     Some partial orders of record values
     记录的一些序关系
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     the soil pH value was neutral but on the alkali side;
     土壤pH中性碱性;
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     The influence of structure of the chiral aminoalcohol on the enantioselectivity was studied.
     的影响;
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     DMF are obtained for different stiffness ratio.
     DMF
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     2.Partial derivatives;
     2.导数;
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  value is
This value is a good stability bound of Fourier frames because it covers Kadec's 1/4-theorem and is better than (see Duffin and Schaefer [3]).
      
Different from rational quadratic Bézier curves, the value is generally related with the location of the ray, and the necessary and sufficient condition of the ratio being independent of the ray's location is showed.
      
One type is the threshold concentration that can promote algae growth, and its value is between 10 and 1 nmol level, or even lower.
      
Results show that in the studied pH value range, the lower the pH value is, the higher is the UV-vis absorbance and the larger is the thickness of the multilayer films.
      
The image is realized by modulating the voltage of under-gate, whose value is less than the cathode voltage, to stop the cathode producing field emission electrons.
      
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An experimental verification of the theoretical peak current equation forreversible electrode reactions of the Randles-Sevcik oscillopolarography, i_p=Kn~(3/2)D~(1/2)m~(2/3)θ~(2/3)α~(1/2)cμΑ, is carried out with both single- and multisweep methods. Themultisweep method is essentially that of Delahay, while a simplified circuit isdevised for the single-sweep procedure. The constant K in the above equation has been worked out by Randlesand Sevcikc, but their values differ by some twenty-one percent. Experimentalresults...

An experimental verification of the theoretical peak current equation forreversible electrode reactions of the Randles-Sevcik oscillopolarography, i_p=Kn~(3/2)D~(1/2)m~(2/3)θ~(2/3)α~(1/2)cμΑ, is carried out with both single- and multisweep methods. Themultisweep method is essentially that of Delahay, while a simplified circuit isdevised for the single-sweep procedure. The constant K in the above equation has been worked out by Randlesand Sevcikc, but their values differ by some twenty-one percent. Experimentalresults as to which K value is correct have been contradictory. The authorspoint out that Sevcik's value of K is too low, due to the error in choosing too largea unit in his numerical integration. By taking smaller units and reperformingthe integration, the K value increases and approaches that of Randles. Thus thecorrectness of Randles' K value is ascertained and this value is used in calculatingthe theoretical slope. Their single-sweep results, with concentrations from 2×10~(-4) to 1×10~(-3) m/l andα~(1/2) from 1 to 4 volts/sec, agreement between experimental and theoretical slopesis obtained in the case of Tl~+ in m NaCl. In the case of Cd~(++) in m NaCl, experi-mental results deviate from the theoretical value, and the deviation increases withincreasing c and α~(1/2). Contrary to an unproven idea of Delahay, i_p obtained bymultisweep method is higher than that by the single-sweep procedure. However,in calculation of the theoretical values, a value of 15.0×16~(-6) obtained by polarLographic method is used for D of Tl~(+) in m NaCl. The use of the value of Dat infinite dilution is thought to be unjustified. If a D value of 15.0×10~(-6) is used,Delahay's results of Tl~+ in KNO_3 would be higher than the theoretical equationinstead of agreeing with it. This fact seems to support the findings of this paper. Various methods of correcting for capacity currents are compared and discus-sed. The authors point out that at α~(1/2) less than 2 volts/sec, the method of drawingan hbrizontal line introduces no appreciable error while at, high α, various methodsyield different results. This fact lowers the accurraey of data obtained at high α. The iR drop in the electrolytic cell and on the series resistance causes themeasured α to be different from the a actually applied on the drop electrode. Anelementary approximate correction of this effect is mentioned. Results after thiscorrection show that the deviation of Cd~(++) from theoretical at high c and α maybe due partly to this effect.

(1)以单波法及多波法验证Randles-Sevcik示波极谱理论公式之i_p~c及i_p~α~(1/2)关系,多波法用Delahay线路,单波法则用简化线路。单波法之结果,对亚铊离子在m氯化钠中,在2×10~(-4)~1×10~(-5)m浓度,α~(1/2)为1及4伏特/秒,实测结果和理论符合。镉离子在m氯化钠中,实测结果与理论有偏差,偏差随浓度及α~(1/2)加大而加大。多波法之i_p实测值高于单波法。 (2)在计算理论曲线时,作者肯定Sevcik之系数过低而采用Randles数值。亚铊离子于m氯化钠中之扩散系数D,采用极谱法测得之数值15.0×10~(-6)而不用无限稀时之D值(20.0×10~(-6))。 (3)在α~(1/2)低于2伏特/秒时,可用画水平线法扣除电容电流。在高α时各种扣除电容电流方法所得结果不同,影响结果之可靠性。 (4)电解池线路上之iR降使加在滴汞电极上之α改变。这种改变使实测i_p值偏低。作者曾作初步近似修正,结果说明α及浓度大时,镉离子实测数据对理论的偏差的一部分可能是由于iR降的作用。

1. It is experimentally proved that when there is polymer permeation through membrane,?? =σ·??.2. It is pointed out that the material balance of the solute in the solution and solvent cells is probably not satisfied, as most of the permeated macromolecules might remain in the membrane phase.3. When the volume change due to permeated amount of the solute itself can be neglected, the observed osmotic pressure is given by ?? where k_s,k_p are the permeation rate constants of solvent and solute molecules respectively...

1. It is experimentally proved that when there is polymer permeation through membrane,?? =σ·??.2. It is pointed out that the material balance of the solute in the solution and solvent cells is probably not satisfied, as most of the permeated macromolecules might remain in the membrane phase.3. When the volume change due to permeated amount of the solute itself can be neglected, the observed osmotic pressure is given by ?? where k_s,k_p are the permeation rate constants of solvent and solute molecules respectively 4. If there is no very low molecular weight portion present in the polymer sample,the present authors propose to observe the gradual decline of the observed osmotic pressure during a period of 5- 10 fold of the equilibration time for the solvent through the membrane as a criterion for the permeation of macromolecules.5. Experimental data show that a permeable membrane gives too high value for M_n and too low value for A_2.

1.用实验证实有高分子透过半透膜时,π_(实验)=σ·π_(理论). 2.指出在透过过程中,溶质在溶液池和溶剂池内的物料平衡可能并不满足,大部分进入半透膜的高分子会停留在膜内. 3.在忽略溶质透过本身所引致的体积改变时,渗透压观察值 ?? k_s,k_p分别是半透膜对溶剂分子和高分子的透速常数. 4.高聚物试样中如无分子量极低的部分时,作者等建议可以在五至十倍于溶剂平衡所需时间的期间内观察渗透压是否随时间缓缓下降作为高分子有无透过半透膜的判据. 5.实验数据显示部分高分子透过半透膜的结果使所得??_n值偏高,A_2值偏低.

The present paper deals with the synthesis of three pentapeptides containing the same amino acid sequence of the N-terminal of the A-chain of insulin, but differing in their protecting groups. They are N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-γ-methyl-L-glutamyl-L-glutamine (Ⅰ), N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-γ-methyl-L-glutamyl-L-glutamine carbo-t-butoxyhydrazide (Ⅱ) and N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-L-glutamyl-L-glutamine methyl ester (Ⅲ).

本文报告三种带不同保护基的胰岛素A键氨端五肽的合成。它们是N-苄氧羰基甘氨酰-异亮氨酰-缬氨酰-γ-甲酯-谷氨酰-谷氨酰胺(Ⅰ)、N-苄氧羰基甘氨酰-异亮氨酰-缬氨酰-γ-甲酯-谷氨酰-谷氨酰胺酰肼基甲酸叔丁酯(Ⅱ)和N-苄氧羰基甘氨酰-异亮氨酰-纈氨酰-谷氨酰-谷氨酰胺甲酯(Ⅲ)。五肽Ⅰ是由初次合成的N-苄氧羰基甘氨酰-异亮氨酰-纈氨酸(Ⅵ)与γ-甲酯-谷氨酰-谷氨酰胺(Ⅸ)经羧酸碳酸混合酸酐法,或Ⅵ的酰肼衍生物与Ⅸ经迭氮化物法缩合而成。五肽Ⅱ是由Ⅵ与γ-甲酯-谷氢酰-谷氨酰胺酰肼基甲酸叔丁酯(Ⅺ)经混合酸酐法合成。五肽Ⅲ则系用活化酯法由谷氨酰胺甲酯的氨端开始,逐步与相应的N-保护的氨基酸对硝基苯酯缩合、延伸而得。在用混合酸酐法合成五肽Ⅰ中,从反应混合物分离得N-苄氧羰基甘氯酰-异亮氨酰-D-纈氨酸(ⅩⅫ)。由ⅩⅫ与Ⅸ合成五肽Ⅰ的立体异构体,N-苄氧羰基甘氨酰-异亮氢酰-D-纈氨酰-γ-甲酯-谷氨酰一谷氨酰胺(ⅩⅩⅢ)。由N-苄氧羰基-γ-甲酯-谷氧酰-谷氨酰胺酰肼基甲酸叔丁酯(Ⅹ)经脱去酰肼上的保护基后,用迭氮法与S-苄基-半胱氨酰-S-苄基-半胱氨酸缩合而得N-苄氧羰基-γ-甲酯-谷氨酰-谷氨酰胺酰-S...

本文报告三种带不同保护基的胰岛素A键氨端五肽的合成。它们是N-苄氧羰基甘氨酰-异亮氨酰-缬氨酰-γ-甲酯-谷氨酰-谷氨酰胺(Ⅰ)、N-苄氧羰基甘氨酰-异亮氨酰-缬氨酰-γ-甲酯-谷氨酰-谷氨酰胺酰肼基甲酸叔丁酯(Ⅱ)和N-苄氧羰基甘氨酰-异亮氨酰-纈氨酰-谷氨酰-谷氨酰胺甲酯(Ⅲ)。五肽Ⅰ是由初次合成的N-苄氧羰基甘氨酰-异亮氨酰-纈氨酸(Ⅵ)与γ-甲酯-谷氨酰-谷氨酰胺(Ⅸ)经羧酸碳酸混合酸酐法,或Ⅵ的酰肼衍生物与Ⅸ经迭氮化物法缩合而成。五肽Ⅱ是由Ⅵ与γ-甲酯-谷氢酰-谷氨酰胺酰肼基甲酸叔丁酯(Ⅺ)经混合酸酐法合成。五肽Ⅲ则系用活化酯法由谷氨酰胺甲酯的氨端开始,逐步与相应的N-保护的氨基酸对硝基苯酯缩合、延伸而得。在用混合酸酐法合成五肽Ⅰ中,从反应混合物分离得N-苄氧羰基甘氯酰-异亮氨酰-D-纈氨酸(ⅩⅫ)。由ⅩⅫ与Ⅸ合成五肽Ⅰ的立体异构体,N-苄氧羰基甘氨酰-异亮氢酰-D-纈氨酰-γ-甲酯-谷氨酰一谷氨酰胺(ⅩⅩⅢ)。由N-苄氧羰基-γ-甲酯-谷氧酰-谷氨酰胺酰肼基甲酸叔丁酯(Ⅹ)经脱去酰肼上的保护基后,用迭氮法与S-苄基-半胱氨酰-S-苄基-半胱氨酸缩合而得N-苄氧羰基-γ-甲酯-谷氨酰-谷氨酰胺酰-S-苄基-半胱氨酰-S-苄基-半胱氨酸(四肽ⅩⅩⅤ)。五肽Ⅰ、Ⅱ、Ⅲ,四肽ⅩⅩⅤ及其主要的合成中间肽的光学纯度均经亮氨酸氨肽酶、胰羧肽酶法或旋光法检定。在五肽的酶水解的条件下有部分的谷氨酰胺和谷氨酸变为四氢吡咯酮-(5)-羧酸-(2),致使该二氨基酸的测定值偏低。

 
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