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thz
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  太赫兹
     Terahertz (THz) radiation occupies the electromagnetic (EM) spectrum region between approximately 30 μm and 1 mm (10 THz-300 GHz).
     太赫兹(Terahertz,THz)辐射是波长介于30gm-1mm(10THz-300GHz)间的电磁波。
短句来源
     Properties of differently doped Zn 0 95 Cd 0 05 Te〈110〉 crystals as te rahertz (THz) wave emitter are studied using THz time- domain spectroscopy.
     利用太赫兹 (THz)时域光谱技术研究了不同掺杂的Zn0 95 Cd0 0 5 Te〈110〉单晶产生THz辐射的特性 .
短句来源
     For the electron beam with the energy 20MeV, the emmitance 1 5πmm·mrad, the beam length 200fs and the electric charge 50pC, the THz radiation with the horizontal linear polarization or the circular polarization of the maximum flux density of 2×10 9 photons/mm 2/0 1%bw can be obtained at the distance 1m from the center of the undulator with 0 6m length.
     计算结果表明 ,对于能量为 2 0MeV、发射度为 1 5πmm·mrad、束团长度为 2 0 0fs、电荷量为 5 0pC的电子束团 ,在距离 0 6m长的波荡器中心 1m处可获得光通量密度峰值达 2× 10 9photons mm2 0 1%bw量级的太赫兹水平线极化光或圆极化光
短句来源
     The absorption spectra of anthraquinone, 2_methylanthraquinone, anthraquinone_2_sulfonic acid sodium salt, anthraquinone_26_disulfonic acid disodium salt and anthraquinone_27_disulfonic acid disodium salt have been measured by terahertz time_domain spectroscopy over the frequency range from 0.3 to 1.65THz at room temperature.
     利用太赫兹(terahertz,THz)时域光谱技术室温下进行了蒽醌及其衍生物2_甲基蒽醌、蒽醌_2_磺酸钠、蒽醌_2,6_二磺酸钠、蒽醌_2,7_二磺酸钠在10~55cm-1(0.3~1.65THz)频谱范围内的光谱测量。
短句来源
     We measured the absorption spectra of chiral compounds of D、L、DL-tyrosine and D、L、DL-tryptophan by terahertz time-domain spectroscopy over the frequency range from 0.1 THz to 2.0 THz at room temperature.
     利用太赫兹时域光谱室温下对手性对映体D 酪氨酸、L 酪氨酸、外消旋化合物DL 酪氨酸和D 色氨酸、L 色氨酸、外消旋化合物DL 色氨酸在 0 1~ 2 0THz频谱范围内进行了光谱测量 .
短句来源
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  “thz”译为未确定词的双语例句
     The Synthesis of Cyclo-[(gly)The-Pro-Leu-Val(L&D)-(gln) Thz]
     环肽Cyclo-[(gly)Thz-Pro-Leu-Val-(L和D)-(gln)Thz]的合成
短句来源
     SYNTHESIS OF HEXAPEPTIDE Ile-Thr-(Val)Thz-Ile-Thr-(Val)Thz
     六肽Ile-Thr-(Val)Thz-Ile-Thr-(Val)Thz的合成
短句来源
     Study of differently doped Zn_(0.95)Cd_(0.05)Te〈110〉 single crystals as THz emitters
     不同掺杂Zn_(0.95)Cd_(0.05)Te〈110〉单晶的THz辐射特性研究
短句来源
     A CMOS 1.4THzΩ 155Mb/s Differential Transimpedance Preamplifier for Optical Receiver
     CMOS1.4THzΩ155Mb/s光接收机差分跨阻前置放大器
短句来源
     Synthesis of He-Ne laser frequency at 88 THz
     88THz He-Ne激光频率的综合
短句来源
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  相似匹配句对
     Progress of the THz's Technology
     THz技术进展
短句来源
     The key of THz is its generation and detection.
     THz电磁辐射的关键技术就是 THz的产生和检测。
短句来源
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  thz
The detector reception band is tunable between 80 and 250 μm (3.75-1.2 THz).
      
The detection ability of the detector is 1012 cm Hz1/2/W at 2 THz.
      
The maximums in the MM component at 14 THz and KtKt component at 55 THz are related to IR bands in the spectrum.
      
A negative peak is observed in the (KtAn + AnKt) component at 4 THz.
      
We have achieved an (1σ) uncertainty for rotational transitions in the Ka = 0, 1 states recalculated to the Doppler velocity scale ≤2 m s-1 for all frequencies >amp;lt;1.1 THz.
      
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A new synthetic method of dehydropeptides, by direct coupling of N-protected amino acids or N-protected peptides with β-hydroxy -α-amino acid esters in the presence of three equivalents of each of triphenylphosphine, carbon tetrachloride, and triethylamine or ethyl diisopropylamine, was devcloped. Compounds synthesized by this method were Boc-DL-Ile-⊿But-oMe, Boc-DL-Ile-⊿Ala-oMe, Boc-DL-Val⊿Ala-OMe, Boc-L Ile-DL-Val(Thz)-⊿But-oMe, and Boc-L-Ile-DL-Val(Thz)-⊿Ala -oMe. In the case of L-threone methyl...

A new synthetic method of dehydropeptides, by direct coupling of N-protected amino acids or N-protected peptides with β-hydroxy -α-amino acid esters in the presence of three equivalents of each of triphenylphosphine, carbon tetrachloride, and triethylamine or ethyl diisopropylamine, was devcloped. Compounds synthesized by this method were Boc-DL-Ile-⊿But-oMe, Boc-DL-Ile-⊿Ala-oMe, Boc-DL-Val⊿Ala-OMe, Boc-L Ile-DL-Val(Thz)-⊿But-oMe, and Boc-L-Ile-DL-Val(Thz)-⊿Ala -oMe. In the case of L-threone methyl ester, only Z-dehydroamino acid residue was observed. A possible mechanism was proposed. It was believed that the Nprotected amino acid or N-protected peptide was coupled first with β-hydroxy -α-amino acid ester, forming a peptide having a β-hydroxyamino acid residue at the C terminal, and then dehydration of the newly formed peptide gave dehydropeptide. The same reagents were used to synthesize peptide oxazolines. The key factor affecting reaction directions was the acidity of the protons at the α-C-H bond and at the N-H bond.

由N端保护的氨基酸或肽与β-羟基-α-氨基酸酯在三苯基膦、三乙胺、四氯化碳的存在下直接缩合,一步就可得到C端含脱氢氨基酸的肽类.在L-苏氨酸甲酯的情况下,全部生成Z型脱氢氨基酸.其可能的反应历程是N端保护的氨基酸或肽与β-羟基-α-氨基酸酯首先缩合形成肽键,然后进一步脱水生成产物.当用同样试剂处理Boc-L-ILe-L-Ser-L-ILe-OMe时,则形成肽类噁唑啉.影响反应方向的主要因素是α—C—H键质子酸性和酰胺N—H键质子酸性的相对强弱.

Cyclo-[(gly) Thz-Pro-Leu-Val-(L&D)-(gln) Thz] (2) was synthesized. In this process, the thiazole amino acid, z-(L&D)(gln)ThzOH (6), was obtained by directly condensing a thioamide with bromopyruvic acid; the formation of peptide bond was carried out with DCC and azide methods and the cyclzation with DPPA in high dilution (10~(-3)-10~(-4)M). The product has mp. 180-186℃ (uncorr.), [α]_D~(19)-28.9℃(c 0.19, EtOH). 2 is structurally similar but not identical to Dolastatin-3. The preliminary physiological...

Cyclo-[(gly) Thz-Pro-Leu-Val-(L&D)-(gln) Thz] (2) was synthesized. In this process, the thiazole amino acid, z-(L&D)(gln)ThzOH (6), was obtained by directly condensing a thioamide with bromopyruvic acid; the formation of peptide bond was carried out with DCC and azide methods and the cyclzation with DPPA in high dilution (10~(-3)-10~(-4)M). The product has mp. 180-186℃ (uncorr.), [α]_D~(19)-28.9℃(c 0.19, EtOH). 2 is structurally similar but not identical to Dolastatin-3. The preliminary physiological activity test shows that 6 has an effect of inhibiting lung cancer A-549 cell in concentration at 30-50μg/ml and 2 in 10-30μg/ml, and z-(gly)Thz-Pro-Leu-ValOH has not such activity. In addition, the preparation of γ-benzyl glutamate was improved.

含噻唑环的氨基酸由溴代丙酸直接与硫胺缩合;肽链的形成使用二环已基碳二酰亚胺法和叠氮法,环化位置选择在两个噻唑氨基酸之间,采用高稀浓度二苯基磷酸叠氮酯作缩合剂环化.产物熔点180~186℃,[α]_D~(19)-28.9°.初步生理试验表明,对于肺癌A-549细胞的有效抑制浓度:(L和D)-(gln)ThzOH是30μg~50μg/ml,最终产物是30ug~10μg/ml,本工作共合成了16个新化合物.

The reported patellamide-A(1) was synthesized from D-(Val)Thz-OH, L-isoleucine, L-threonine, and L-serine. Bz-D-(Val)-Thz-OEt(7) was synthesized by imino ester method. The serine derived oxazoline methylester(11) was produced by the ph_3P. Et_3N.CCl_4 procedure and hydrolysis of 11 yielded the oxazoline acid(12). The threonine derived oxazoline(17) was synthesized by imino ester method and deprotection of 17 gave rise to the N-deblocked oxazoline(18). The coupling of 12 with 18 yielded linear peptide...

The reported patellamide-A(1) was synthesized from D-(Val)Thz-OH, L-isoleucine, L-threonine, and L-serine. Bz-D-(Val)-Thz-OEt(7) was synthesized by imino ester method. The serine derived oxazoline methylester(11) was produced by the ph_3P. Et_3N.CCl_4 procedure and hydrolysis of 11 yielded the oxazoline acid(12). The threonine derived oxazoline(17) was synthesized by imino ester method and deprotection of 17 gave rise to the N-deblocked oxazoline(18). The coupling of 12 with 18 yielded linear peptide methyl ester(19a), which was then converted to pentafluoro phenyl ester(19c). Deprotection and cyclization of 19c produced 1.1 is an unstable compound and can be hydrolyzed to cyclic peptide(20) by water in solvents. Both 1 and 20 showed antineoplastic activity.

本文从D-(缬)噻唑氨基酸、L-异亮氨酸、L-丝氨酸、1-苏氨酸出发合成了PatellamideA类似物环肽(1)。D-(缬)噻唑氨基酸由D-缬氨酸和L-半胱氨酸按亚胺酯法合成。丝氨酸噁唑啉(11)由三苯基膦法合成,苏氮酸噁唑啉(17)由亚胺酯法合成。11和17去保护基后经DCC/HOBT法转变为线性肽(19a),19a用五氟苯酯法环化得得1.1和其丝氨酸噁唑啉的开环产物环肽都具有抗肿瘤活性。

 
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