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线团
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  coil
     Peak 2 is abundant in β-pleated sheet (95.5%) and Peak 3 includes α-helix (60%) and random coil (40%).
     峰2为β-折叠 ,占 95.5% ; 峰 3以 60 %的α-螺旋和 40 %的无规线团形式存在。
短句来源
     For PDEA and P(DEA-co-NHMAA) aqueous solutions, the abrupt transition from coil to globular and the gradual transition from globular to coil may involve different mechanisms.
     PDEA和P(DEA-co-NHMAA)从无规线团(coil)到蜷曲球(globular)的突然转变与从globular到coil的逐渐转变机理不同.
短句来源
     The effect of temperature(20~40 ℃)on the Mesona Blumes gum intrinsic viscosity was investigated,the critical coil overlap of its dilute domain was calculated as 1.13,and the slope of its semi-dilute domain was between 0.8~1.2,through comparing these results with other polysaccharides.
     研究了凉粉草胶多糖在20~40℃之间特性粘度对温度的敏感性,计算得其稀溶液的临界线团交叠值C*[η]平均为1.13,半稀释区斜率b为0.8~1.2,与其他多糖进行了比较。
短句来源
     The unperturbed dimensions〈S2〉 and Kθ are respectively 12. 1 ×10-18 cm2mol g-1 and 0. 175 cm3g-1. We conclude that the acidic heteropolysaccharide behaves as a slightly stiffened random coil chain in aqueous solution.
     无扰尺寸(S~2)_0/M及K_8为12.9×10~(-18)cm~2·mol/g及0.175cm~3/g. 确证该多糖分子在溶液中呈稍刚硬的柔性无规线团状态.
短句来源
     It was found through circular dichroism spectrum analysis that the secondary structure of Peak 1 was the most complex, including β-corner (31.5%), random coil (27%) and α-helix (25.8%).
     园二色谱测定酶的二级结构 :峰 1结构最为复杂 ,以β-转角为最高 ,占 31 .5% ,无规线团占 2 7% ,α-螺旋占 2 5.8% ;
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  “线团”译为未确定词的双语例句
     The micelle or clews were as a template, in which the silver nanoparticles formed. When the pH was 2.6、 8.9 and 12.5, the size of micelle or clews was 35nm、47nm and 12nm, and the size of silver nanoparticles was 35nm、 12nm and 12nm , respectively.
     这些胶束或线团结构的聚合物可以作为纳米银形成的模版,纳米银的尺寸由胶束或线团里孔穴尺寸决定,当pH值为2.6、8.9和12.5的时候,PDMAEMA-b-PPA形成的胶束或线团尺寸分别为35nm、47nm和12nm,相应所制备得到的纳米银尺寸分别为35nm、12nm和12nm。
短句来源
     The results demonstrated that the conformation behavior of P(DEAM co MAA) in dilute aqueous solution is similar to that of PMAA,showing hypercoiled conformation and forming hydrophobic microdomain when the molar fraction of DEAM in P(DEAM co MAA) is less than 8.00% and the solution pH is less than 6;
     结果表明,当共聚物中DEAM含量小于8.00%(molarfrac-tion),溶液的pH<6时,P(DEAM-co-MAA)在稀水溶液中的构象行为与聚甲基丙烯酸(PMAA)相似,共聚物可形成疏水微区,表现为一种较为高度压缩的线团构象;
短句来源
     It showed that the conformation of hTNF α Da in urea solutions was changed and hTNF α Da was gradually dissociated into monomers and a random clew when the urea concentration was increased to 4~6 mol/L
     发现在尿素的作用下,hTNFαDa的结构发生了变化,当尿素浓度增加到4~6mol/L时,hTNFαDa逐渐解聚为单体和无规线团
短句来源
     The tensile strength and break elongation has increased with reduce of thickness or width of parallel area of sample because narrow or thin sample appears bigger shear deformation when they have suffered tension.
     随着拉伸试样平行区宽度或厚度的减少,拉伸强度和断裂伸长率均增加,这主要是因为韧性试样受到拉伸时发生剪切变形作用,较窄( 或较薄) 的试样将出现较大的剪切形变速率,使高分子线团网络达到较高的拉伸取向程度。
短句来源
     The influences of nonionic Gemini surfactant(GS420) on the plugging performance, viscosity, and size of the linked polymer coils (LPC) in linked polymer solution (LPS) were investigated by nuclear pore membrane test, dynamic light scattering and dynamic viscosity determination.
     采用核微孔滤膜过滤实验、落球粘度计及动态光散射法,研究了非离子型Gemini表面活性剂(GS420)对交联聚合物溶液(LPS)的封堵性能、粘度及交联聚合物线团(LPC)大小的影响。
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  相似匹配句对
     SOME PROPERTIES OF LINE-CLIQUE GRAPH
     线团图的性质
短句来源
     Some Property of the Clique Graph of a Line Graph
     线团图的一些性质
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  coil
Experimental results on Coil-100 object database, which consists of 7200 images of 100 objects, are presented.
      
The planar spiral coil was connected as an amplitude modulation circuit.
      
The same coil adopted differential architecture for signal detection and extraction.
      
This microrelay is composed of a lower magnetic circuit, a planar exciting coil, and an upper magnetic armature.
      
A complete magnetic circuit is composed, and the "ON" and "OFF" states are controlled by the current of the exciting coil.
      
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A water-extracted polycaprolactam sample was fractionated from a 2% solution in 85% formic acid at 25℃, water being used as precipitant. Carboxyl end-group titration and viscosity measurements in 40% H_2SO_4 at 25℃ were carried out for the fractions obtained. The experimental data fit either of the following equations: [η] = 5.92 × 10~(-4) M~(0.686) [η] = 2.44 × 10~(-5)M + 0.080 in the molecular weight range of 3000-13000, concentrations being in g/dl. Viscosity data were treated according to the empirical...

A water-extracted polycaprolactam sample was fractionated from a 2% solution in 85% formic acid at 25℃, water being used as precipitant. Carboxyl end-group titration and viscosity measurements in 40% H_2SO_4 at 25℃ were carried out for the fractions obtained. The experimental data fit either of the following equations: [η] = 5.92 × 10~(-4) M~(0.686) [η] = 2.44 × 10~(-5)M + 0.080 in the molecular weight range of 3000-13000, concentrations being in g/dl. Viscosity data were treated according to the empirical equatibns lnη_r / c = [η] - β[η]~2c (1) η_(sp) / c = [η] + k'[η]~2c (2) log(η_(sp) / c) = log[η] + k[η]c (3) The intrinsic viscosities obtained from (1) and (3) are identical, while those obtained from (2) are smaller by 1-2%. The values of β and k' vary with molecular weight. They increase appreciably with decreasing molecular weight. This anormalous behavior indicates that the value of k' is in no way connected with the solvent-power of the solvent for the polymer, when strong solvation is of prime importance for the dissolution of polymer. In 40% H_2SO_4 solution, polycaprolactam shows no appreciable degradation and no polyeletrolyte 'behavior. We have also acertained that the solution is Newtonian by deter- mining the efflux times in a capillary viscometer under various external hydrostatic heads. So we concluded that 40% H_2SO_4 is a suitable solvent for the viscometric determination of molecular weight of polycaprolactam. From the intrinsic viscosity-molecular weight relation obtained, the Stokes radii of the macromolecules in solution have been calculated according to the theory of Debye and Bueche. The resuk shows that polycaprolactam molecules in 40% H_2SO_4 solution are quite coiled and can be regarded as random coils.

(1)聚己內醯胺試樣在85%甲酸溶液中加水分級沉澱,得到分子量不同的級份,經羧基滴定,並於40%硫酸溶液中,在25°時测定粘度,得到下面的特性粘數分子量關係式: [η]=5.92×10~(-4) M~(0.686)或 [η]=2.44×10~(-5) M+0.080濃度單位是克/分升,分子量範圍是3000-13000。 (2)聚己內醯胺的40%硫酸溶液的粘度數據,試用了三種外推公式: lnη_r/c=[η]-β[η]~(2)c (1) η_(sp)/c=[η]+k′[η]~(2)c (2) logη_(sp)/c=log[η]+k[η]c (3) 用式(1)和式(3)得到的[η]值相同,式(2)得到的略小1-2%。β和k′值隨分子量的减小而顯著地增大,這和一般的高聚物——溶劑體系的行為相反。當高分子與溶劑分子間的氫鍵作用是高聚物溶解的主要因素時,用k′值來做溶劑能力的估計,是完全沒有意義的。 (3) 聚己內醯胺在40%硫酸裏,溶液粘度的切變速度依賴性是可以忽略的。我們認為40%硫酸是測定聚己內醯胺的粘均分子量的最合適溶劑。 (4) 從粘度數據依照Debye和Bueche的特性粘數理論,算出聚己內醯胺分子在40...

(1)聚己內醯胺試樣在85%甲酸溶液中加水分級沉澱,得到分子量不同的級份,經羧基滴定,並於40%硫酸溶液中,在25°時测定粘度,得到下面的特性粘數分子量關係式: [η]=5.92×10~(-4) M~(0.686)或 [η]=2.44×10~(-5) M+0.080濃度單位是克/分升,分子量範圍是3000-13000。 (2)聚己內醯胺的40%硫酸溶液的粘度數據,試用了三種外推公式: lnη_r/c=[η]-β[η]~(2)c (1) η_(sp)/c=[η]+k′[η]~(2)c (2) logη_(sp)/c=log[η]+k[η]c (3) 用式(1)和式(3)得到的[η]值相同,式(2)得到的略小1-2%。β和k′值隨分子量的减小而顯著地增大,這和一般的高聚物——溶劑體系的行為相反。當高分子與溶劑分子間的氫鍵作用是高聚物溶解的主要因素時,用k′值來做溶劑能力的估計,是完全沒有意義的。 (3) 聚己內醯胺在40%硫酸裏,溶液粘度的切變速度依賴性是可以忽略的。我們認為40%硫酸是測定聚己內醯胺的粘均分子量的最合適溶劑。 (4) 從粘度數據依照Debye和Bueche的特性粘數理論,算出聚己內醯胺分子在40%硫酸裏的等效Stokes半徑,說明聚己內醯胺分子在40%硫酸溶液裏的形態,可以看作是無規則的線團。

The viscosity data of a low temperature Buna-S rubber fraction(M=1.0×10~6)have been determined at 25.0℃ at five concentrations in the range of shear ratesD=10—20,000 sec~(-1).The viscometer used was designed after Tsuda with a horizon-tal efflux volume pipette for flow under low driving pressure.A single capillarywas used for the efflux of solution for the entire range of shear rates in order toget good continuity of data obtained at different ranges of shear rates.The experi-mental results prove definitely...

The viscosity data of a low temperature Buna-S rubber fraction(M=1.0×10~6)have been determined at 25.0℃ at five concentrations in the range of shear ratesD=10—20,000 sec~(-1).The viscometer used was designed after Tsuda with a horizon-tal efflux volume pipette for flow under low driving pressure.A single capillarywas used for the efflux of solution for the entire range of shear rates in order toget good continuity of data obtained at different ranges of shear rates.The experi-mental results prove definitely the existence of Newtonian flow with relativeviscosities η_r(0)in the range of low shear rates.The values of the Newtonianviscosity η_r(∞)in the region of very high shear rates and the viscosity behaviorin the entire range of shear rates have been estimated from the assumptions thatthe inflexion point D on the Inη_r——ln D curves is independent of concentrationand that the curves are symmetric with respect to their inflexion points.Theequi-shear rate values of lnη_r/C interpolated from the experimental data wereplotted against C and linearly extrapolated to C=0 to get[η]_D values.It again shows definitely the exsistence of a constant[η]_0 value in the range of low shearrates.The experimental data in the transition region between two regions of New-tonian flow can be represented equally well by either of the following equations:where(?)k and s are two parameters,being concentration dependent but approaching aconstant value at higher concentrations.The [η]_D/[η]_0-ln D curve falls closely tothe theoretical one calculated for a rigid ellipsoid with an axial ratio between 4and 5.The rotational diffusion coefficient thus obtained is (?)_(rot)=6.6×10~2_(sec)~(-1).Thevalue of molecular weight calculated from (?)_(rot) and [η]_0 according to the methodof Scheraga and Mandelkern is not in aceord with the actual value and hence thepolymer coil of Buna-S could not be considered to be a rigid structure;while goodagreement is obtained for the molecular weight calculated according to the theore-tical formula of Bueche if the value of 1/D is taken as the relaxation time forelastic deformation of the polynier coil under flow.

对低温聚合丁苯橡膠一个级分(M=1.0×10~6)的甲苯溶液在切变速度 D=10—20,000秒~(-1)范国内测定了五种浓度溶液的粘度数据(25.0℃)。粘度计采用 Tsuda 的水平毛细管水平流出体积计量管的设计,且在全部切变速度范围内都从同一毛细管流出,使不同范围内的数据很好衔接。实验结果证明在低切变速度区域牛顿粘度η(?)(0)的存在。并且从lnη(?)—ln D 曲线的反曲点(?)值不依赖于浓度和对反曲点的对称性估计η(?)(∞)值和整个切变速度范国内的粘度行为。取几个等 D 值时的 lnη(?)按(lnη(?)/C)-C 的线性外推得到[η]_D,明确表示在低切变速度区域[η](?)的存在。两种牛顿流动间转变区域的实难数据可以采用下列两公式线性化:x(D)=(1/2)[1-erf(kln(?))],x(D)=(1/1+(?))~n,式中x=(lnη(?)-lnη(?)(∞)/lnη(?)(0)-lnη(?)(∞)),erf(z)=(?)-u~2du,k 和 n 是依赖于浓度的参数,但在较高浓度时均趋向一恒定值。([η]_D/[η]_0)-ln D 曲线相当符合于刚性橢球轴比 p=4—5间的理论曲线...

对低温聚合丁苯橡膠一个级分(M=1.0×10~6)的甲苯溶液在切变速度 D=10—20,000秒~(-1)范国内测定了五种浓度溶液的粘度数据(25.0℃)。粘度计采用 Tsuda 的水平毛细管水平流出体积计量管的设计,且在全部切变速度范围内都从同一毛细管流出,使不同范围内的数据很好衔接。实验结果证明在低切变速度区域牛顿粘度η(?)(0)的存在。并且从lnη(?)—ln D 曲线的反曲点(?)值不依赖于浓度和对反曲点的对称性估计η(?)(∞)值和整个切变速度范国内的粘度行为。取几个等 D 值时的 lnη(?)按(lnη(?)/C)-C 的线性外推得到[η]_D,明确表示在低切变速度区域[η](?)的存在。两种牛顿流动间转变区域的实难数据可以采用下列两公式线性化:x(D)=(1/2)[1-erf(kln(?))],x(D)=(1/1+(?))~n,式中x=(lnη(?)-lnη(?)(∞)/lnη(?)(0)-lnη(?)(∞)),erf(z)=(?)-u~2du,k 和 n 是依赖于浓度的参数,但在较高浓度时均趋向一恒定值。([η]_D/[η]_0)-ln D 曲线相当符合于刚性橢球轴比 p=4—5间的理论曲线,这样得到的转动扩散系数(?)_(rot)=6.6×10~2秒~(-1),但是从(?)_(rot)和[η]_0值按 Scheraga-Mandelkern 方法计算得到的分子量值与实际不符,所以丁苯橡膠分子线团不是刚性结构;而以1/(?)值作为高分子线团弹性变形的松弛时间,按 Bueche 理论计算得到的分子量值与实际极相一致。

Thread-like virus particles were found in the Hami melon plants infected with a mosaic disease in Turfan, Urumchi and Shexotze districts in Sinkiang. The virus particles, with a diameter of 180A and length longer than 10, 000A, sometimes form unusually complex and orderly aggregates. In the maize plants infected with maize dwarf mosaic disease in Shexotze, large amounts of thread-like particles could be isolated, with a diameter of 170A, and length~6,000A, but occasionally 20,000A. The diameter of the central...

Thread-like virus particles were found in the Hami melon plants infected with a mosaic disease in Turfan, Urumchi and Shexotze districts in Sinkiang. The virus particles, with a diameter of 180A and length longer than 10, 000A, sometimes form unusually complex and orderly aggregates. In the maize plants infected with maize dwarf mosaic disease in Shexotze, large amounts of thread-like particles could be isolated, with a diameter of 170A, and length~6,000A, but occasionally 20,000A. The diameter of the central core was~30A. In the diseased plants infected with wheat mosaic virus grown in Urumchi rodlike particles were found with the following dimensions: diameter 180A; length 6,000~13,000A and diameter of central core, 40A. The above-mentioned virus particles were all isolated and partially purified with the aid of polyethylene glycol precipitation and differential centrifugation.

在新疆吐鲁番、石河子地区及乌鲁木齐市郊区的甜瓜花叶病病株叶片中,用浸出法观察到一种线状病毒质粒,直径180,长达1万以上,有时积聚成精致的有序排列的线团状。在石河子的玉米矮花叶病病株叶片中,分离出大量比较纯净的线状病毒质粒,直径180,长度一般为6000,最长者在20000以上,空心直径30,在乌鲁木齐市郊的小麦花叶病病株中,见到软捧状病毒质粒,直径200,长度6000~13000,空心直径40。这三种病毒质粒均可用聚乙二醇沉淀及差速离心相结合的方法净化之。

 
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