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     To analyse hereditary features and and rules of the foreign gene in the trans-Hu-IFN-α-gene carp,PCR testing technology were employed to test the Hu-IFN-α gene’s genetic expression in its cross F1 and gynogenesis F1 generation.
     为了分析外源基因在转基因鱼F1中的遗传特征和规律,采用PCR检测技术对Hu-IFN-α基因在转基因草鱼及其杂交F1,雌核发育F1中的遗传表达情况进行检测.
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     Methods The expression of VEGF and and its receptor FLT 1, FLK 1 mRNA were analized by reverse transcription polymerase chain reaction (RT PCR) in the specimens from 47 patients with breast cancer and 11 patients with benign breast disease.
     方法 采用逆转录聚合酶链反应技术对手术的 47例乳腺癌标本 ,11例乳腺良性病变标本中血管内皮生长因子 (VEGF)及其受体FLT 1、FLK 1mRNA的表达进行检测。
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     On the foundation of comparing the current integrated network management normalization,it summarizes the advantages of Web Services in resolving the problem in Navy network management,and it analyses the Web Services protocol architecture and and compares with DCOM and CORBA ,and deeply probe into the facing service and inter-operation characteristic of Web Services.
     本文主要研究基于Web Services的海军信息网综合网络管理系统,在对目前国内外几种综合网络管理规范进行比较分析的基础上,总结出Web Services在解决海军综合网管面临的主要问题所具有的优势,研究Web Services协议体系,并同CORBA、DCOM等现有分布式技术进行比较,深入探讨Web Services面向服务的特性及其互操作特性。
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     Objective To observe the appearances of rheumatoid arthritis(RA) , assess the role of MRI in diagnosis and and evaluate disease prognosis of rheumatoid arthritis.
     目的 研究类风湿关节炎(rheumatoid arthritis,RA)腕关节MRI表现及其临床应用价值。
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     The objects of this thesis is numberical simulation of reacting flows in plane turbulent jets and and the applications in reacting flows of selective non-catalytic NOx reduction.
     本文研究实例对象是湍流平面强射流的反应流模拟和及其在SNCR(Selective—Non—Catalytic NOx Reduction)的反应流模拟中的应用。
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     Application of Formation Testing Technology to Oil and and Gas Exploration in China
     Application of Formation Testing Technology to Oil and and Gas Exploration in China
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  “and and”译为未确定词的双语例句
     the patient with hyperammonaermia were 32 case, among 50 patients,there were 30 patients with Hp-lgG(+),the positive rate of is 60%(30/50 ), and and 2 patients with Hp-lgG (-),the negative rate of is 4%(2/50 ).
     血氨升高的患者有32例,其中Hp-lgG阳性患者30例,占60%(30/50),Hp-lgG阴性患者2例,占4%(2/50)。
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     NH2D was prepared by mixing ND3 and and ND3 was prepared by the present authors.
     NH_2D由ND_3和NH_3混合而制备,ND_3由作者自制.
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     Of the liver cirrhosis group,the serum PCⅢ for HBeAg positive subgroup and and that for anti HBe positive subgroup were 133.9±20.0 μg/L and 172.9±52.2 μg/L respectively, showing marked difference( P <0.05).
     肝硬化组中,HBe-Ag阳性亚组和抗HBe阳性亚组血清PCⅢ分别是133.9±20.2μg/L和172.9±52.4μg/L,二者比较有显著差异(P<0.05)。
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     The local control rate,median survial period,one year survival rate and mortality were 88.2%,12.5 months,64.7% and 35.3% in SRT plus WBI group,respectivel,and and 90.5%,7.6 months,47.6%and 52.4% in SRT alone group(P>0.05),respectivel.
     SRT加全脑放疗组局部控制率88.2%,中位生存时间12.5个月,1年生存率64.7%,病死率35.3%,与对照组90.5%,7.6个月,47.6%,52.4%比较差异无显著意义(P>0.05)。
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     Randomization of P2/NC protease cleavage site of HIV-1 Gag protein and and its phage display
     HIV-1 Gag蛋白P2/NC蛋白酶切割位点序列的随机化及噬菌体展示
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Nevertheless, Hg2+ can inhibit activity of aquaporins, and and LP of roots decreased 22% in distilled water and 68% in NH4NO3 solution after treatment by HgCl2 respectively.
      
Electrochemical biosensors based on nucleic acids and their use in bioaffinity assays for determining DNA and and its effectors
      
Quasiconcave functions and belong to the same scale if there exist quasiconcave functions and and numbers such that and .
      
Diagnostic testing of programmable logic arrays that directly implement Boolean functions specified in a polynomial form (i.e., as a combination of AND and EXOR arrays) is considered.
      
An equivalent electrical network of a DNA molecule is designed, which could serve as a building block of nanoscale digital logic such as the NOT, OR, and AND gates.
      
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In our study on the synthesis of glucosaminides we have employed 2,4-dinitropheuyl group (DNP) to protect the amino group of glucosamine, and foundthat DNP substitution brings forth an anomalous change in the optical rotation. By following Kent's procedure we obtained from 2-amino-2-deoxy-D-glucose hydrochloride (Ⅰ) N-DNP-2-amino-2-deoxy-D-glucose (Ⅱ). Its meltingpoint, 194°(200--202°, Kofler block), agrees with that reported by Meyer et al.(196±2°) and Morgan et al. (202-4°), but differs from that given by...

In our study on the synthesis of glucosaminides we have employed 2,4-dinitropheuyl group (DNP) to protect the amino group of glucosamine, and foundthat DNP substitution brings forth an anomalous change in the optical rotation. By following Kent's procedure we obtained from 2-amino-2-deoxy-D-glucose hydrochloride (Ⅰ) N-DNP-2-amino-2-deoxy-D-glucose (Ⅱ). Its meltingpoint, 194°(200--202°, Kofler block), agrees with that reported by Meyer et al.(196±2°) and Morgan et al. (202-4°), but differs from that given by Kent(167-9°). The specific rotation values reported by all workers being practicallythe same([α]_D~(23)+50°; [α]_(5463)~(23)+68.7° in 80% ethanol). Acetylation of (Ⅱ) withacetic anhydride and pyridine gave a tetra-acetyl derivative (Ⅲ). Its meltingpoint (214-5°) and [α]_D~(20)(+12°, CHCl_3) also differed from those given by Kent(159-60°; [α]_D~(19)+73°, CHCl_3). (Ⅲ) was nearly quantitatively converted into1-bromo-3, 4, 6-tri-O-acetyl-N-DNP-2-amino-2-deoxy-α-D-glucose (Ⅴ) in usualway. Compound (Ⅴ) is identical with Stacey's bromo-compound (m. p. 162-4°[α]_D~(19)+46.0°, CHCl_3), obtained from another tetraacetyl-N-DNP-derivative (Ⅳ).Since (Ⅳ) was derived from the known 1, 3, 4, 6-tetra-O-acetyl-2-amino-2-deoxy-β-D-glucose (Ⅵ), and (Ⅲ) has also been prepared by us from 1, 3, 4, 6-tetra-O-acetyl-2-amino-2-deoxy-α-D-glucose hydrobromide (Ⅶ) of well establishedα-configuration, these two DNP-compounds (Ⅲ and Ⅳ) should form a pairof α- and β-anomers. Merely on the basis of Hudson's isorotation rule, it shouldbe predicted that (Ⅳ) wore tho α- and (Ⅲ) the β-anomer, which are contradictoryto their configurations as expected from the starting materials used. In order toconfirm the configuration of the C_(1)-atom of the compounds in question, otherpairs of DNP-derivatives of glncosamine, such as (Ⅷ) and (Ⅸ), (Ⅹ) and (Ⅺ),together with (Ⅻ) and (ⅩⅢ) were prepared according to the methods sketchedin Fig. 1. Melting points and specific rotations of these products are presentedin Tablo Ⅰ. Since (Ⅸ) and (Ⅺ) possess higher values of [α]_D than the correspondinganomers (Ⅷ and Ⅹ), (Ⅸ) and (Ⅺ) would be assigned as α-glucosaminides and(Ⅷ) mid (Ⅹ) as the β-anomers, if Hudson's isorotation rule were also applicableto N-DNP-glucosamine derivatives as usual. However, after removal of DNP-groupwith barium hydroxide, (Ⅺ) yielded the known methyl-β-D-glucosaminide (ⅩⅢ)and (Ⅹ), the corresponding α-D-glucosaminide (Ⅻ) (Ⅻ). The configurationsof (Ⅹ) and (Ⅺ) have been further confirmed by direct syntheses of these anomersfrom tho known methyl N-acetyl-α-and β-D-glucosamindes (ⅩⅠⅤ and ⅩⅤ). Con-sequently, (Ⅷ) and (Ⅹ) must be α-type, and (Ⅸ) and (Ⅺ) β-type. The N- DNP-substitution causes an anomalous change in the rotatory power, so that thesubstituted β-glucosaminides are considerably more dextro-rotatory than the cor-responding α-anomers. From Table Ⅰ, it is clear that the differences between the molecular rotations[M]_D of the anomeric pairs (Ⅲ) and (Ⅳ), (Ⅷ) and (Ⅸ) its well as (Ⅹ) and(Ⅺ), (i. e. 2A values) are all negative in sign, while the 2A values for anomericD-glucosamines, D-glucosamine hydrochlorides, pentaacetyl-D-glucosamines andmethyl-D-glucosaminides hydrochlorides are all positive. The 2B values of N-DNP-substituted products have the same sign and nearly the same magnitudeas those of the ordinary anomeric glucosamine derivatives. Thus DNP groupat C_(2)NH_2 has greater influence on the [M]_D of C_(1)-atom than on that of theremaining part of the molecule. This vicinaI effect of DNP-substitution on [M]_Dof the C_(1)-atom may be (i) due to change in polarity , (ii) due to increasein the number of conjugated double bonds (or shift in the absorption bands ofthe substituent, or (iii) due to steric interaction between vicinal substituensof the molecule.

在2-氨基-2-脱羟-D-葡萄糖的氮原子上引入2,4-二硝苯基后,其旋光性有显著的变化。自2-氨基-2-脱羟-D-葡萄糖(Ⅰ),我们获得一新的四乙酰-N-二硝苯基衍生物(Ⅲ), 该物经证明系属于吡喃糖α-型,但其旋光率比其β-端基差向异构体(Ⅳ)更向左旋,而与一般糖类α-与β-异构体之间的旋光率的关系不符。我们再观察N-二硝苯-2-胺基-2-脱羟-D-葡萄糖甲甙及其乙酰衍生物的α-与β-异构体的旋光率,也有相同的反常现象。 Hundson同旋律不完全适用于以上的N-二硝苯-D-胺基葡萄糖及其衍生物的原因可能由于C_(2)原子上N-二硝苯基对邻位C_(1)旋光性的影响所致。

In this paper is presented a simplified two-variable approximate theory, based on the C. Libovc and S. B. Batdorf's theory[6] for elastic orthotropic plates with transverse shear deformations. Assuming that there exists a potential function (x, y) for the traps-verse shear angles rx and ry (see eq. (2.9)), the total potential energy If (eq. (2.8)) can be expressed in terms of two independent unknown functions, the plate deflection w(x, y) and the potential (x, y). By the use of the principle of minimum potential...

In this paper is presented a simplified two-variable approximate theory, based on the C. Libovc and S. B. Batdorf's theory[6] for elastic orthotropic plates with transverse shear deformations. Assuming that there exists a potential function (x, y) for the traps-verse shear angles rx and ry (see eq. (2.9)), the total potential energy If (eq. (2.8)) can be expressed in terms of two independent unknown functions, the plate deflection w(x, y) and the potential (x, y). By the use of the principle of minimum potential energy the Eulcr dcffercntial equations (1.11) for w and and the boundary conditions (1.12)-(1.15) are obtained in Appendix I. The comparision between the results for critical compressive load for a particular case of square simply-supported plate based on the present theory and Robinson's results[8] based on [6] shows that the discrepancy is small, if the anisotropy is not too significant (Table I). It is shown in Appendix H. that for polygonal simply-supported isotropic plates for both the bending and the stability problems the present theory always gives the same results as the theory in [6]. Two kinds of free edges arc distinguished: "entirely free edges" with the boundary conditions as (3.14) and the "stiffened free edges" with the boundary conditions as (3.17). Analysis of examples for orthotropic plates with free edges shows that, in general, cannot be interpreted as the shear deflection.

本文根据C.Libove与S.B.Batdorf关于考虑剪切变形的正交各向异性弹性平板理论建立了一种简化的二变量近似理論。假设横向剪切角r_x与r_y具有势函数φ(见式(2.9),总位能Π(式(2.8))可以通过两个独立函数即板的挠度w(x,y)与势函数φ(x,y)表出。在附录1中利用最小位能原理推出了w与φ的Euler微分方程(1.11)与边界条件(1.12)-(1.15)。計算了四边簡支的方板的一个特例的临界受压載荷,计算結果与Robinson根据文献[6]所作的結果的比較,表明其间的差异很小,如果各向异性的程度不过于显著的話。在附录Ⅱ中证明了,对于直线多边形各向同性簡支板来讲,无論是弯曲或稳定問題,本文結果恆与根据文献[6]的理諭得到的結果一致。区別了两种不同的自由边:“完全自由边”,其边界条件的形式如式(3.14);“加强自由边”,其边界条件形式如式(3.17)。对具有自由边的正交异性板的分析表明,一般說来,φ不能解释为剪切挠度。

Summary This paper discusses the circuit synthesis and development technique of a transistor pulse synchronized frequency division system.It consists of many ele- mentary pulse networks such as:Transistor forming and shaping circuit,trrnsistor blocking oscillator,multivibrator,time delay circuit and “and” gate,etc.The master signal of this system is supplied from a 100—KC/S crystal controlled oscillator.With the use of many stages of both-side synchronized frequency di- viders,the system simultaneously delivers...

Summary This paper discusses the circuit synthesis and development technique of a transistor pulse synchronized frequency division system.It consists of many ele- mentary pulse networks such as:Transistor forming and shaping circuit,trrnsistor blocking oscillator,multivibrator,time delay circuit and “and” gate,etc.The master signal of this system is supplied from a 100—KC/S crystal controlled oscillator.With the use of many stages of both-side synchronized frequency di- viders,the system simultaneously delivers stable sharp pulses of 100—KC/S, 10—KC/S,1—KC/S and 100—C/S repetition frequency.The duration of each pulse of the lowest repetition frequency is about 0.4μs,and shorter for the high repetition frequencies.The amplitudes of the pulaes of the different repetition frequencies are more than 3 volts.The resulting phase shift and drift instability of the cascade synchronized frequency dividers are eliminated by pulse selection method in this system,Hence the output pulses are accurately positioned in time relative to each other.Test results coincide fairly well with theoretical analysis.

在精密的时间测量系统中,为了获得严格的定时同步脉冲,必须消除多级分频器所产生的误差,因而需用比较复杂的分频系统。本文专门讨论了利用脉冲选择的晶体管化同步分频系统的线路综合原理和研制技术问题,对组成系统的各种单元脉冲电路,如晶体管窄脉冲形成器,晶体管间歇振荡器,晶体管多谐振荡器,晶体管延迟电路以及晶体管门电路等均作了较深入的分析,并给出相应的实验结果。系统的主振信号是由一100千赫晶体稳频的振荡器产生,通过多级脉冲选择的双侧同步分频电路,可以同时获得稳定的100千赫,10千赫,1千赫及100赫等重复频率同步窄脉冲,同步脉冲的宽度为0.4微秒,幅度大于3伏。实验结果与理论分析基本上是一致的。

 
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