查询词典 trans

The first asymmetric synthesis of trans-β-hydroxy-γ-butyrolactones:-(3R, 4R, 5S)-4-(1-acetoxy-isopropyl)-3-hydroxy-butyrolactone 65a was achieved starting from isobutylaldehyde through nine steps. The key steps involve the construction of three chiral carbon centers by the Sharpless's asymmetric epoxidation and Substrate directable chemical reaction.

以异丁醛为起始原料，经过九步反应首次设计合成了具有三个手性中心的trans-β-羟基-γ-丁内酯：-（3R，4〓，5S）-4-（1-乙酰氧基-异丙基）-3-羟基-丁内酯65a，关键步骤是Sharpless不对称环氧化和底物定向不对称合成反应。

Result:Seven compounds were identified as imperatorin, deltoin, columbianadin,β-sitosterol, scopoletin,-trans-decursidinol and daucosterol.

结果：从紫花前胡茎叶中分得7个成分，鉴定为欧前胡素，石防风素，哥伦比亚内酯，β-谷甾醇，东莨菪内酯，-trans-decursidinol和胡萝卜苷。

MATERIALS AND METHODS: After the male and female ICR mice copulated, the presence of vaginal plug the following morning was considered as gestational day 0 (GD0). At GD9, GD10, GD11 and GD12, the pregnant mice in the treatment group were treated with 80 mg/kg all-trans-retinoic acid, and those of the control group received the same volume of soybean oil. At GD18, pregnant mice were killed and the embryos were harvested. The abnormalities of the embryos in the treatment group were studied.

材料与方法： ICR小鼠合笼后，查到阴栓当天为孕期第0天(GD0)，孕鼠共50只，随机分为GD9、GD10、GD11、GD12给全反式视黄酸(all-trans-retinoic acid，atRA)实验组和对照组，共5组，每组10只，实验组经口灌胃1次给予孕鼠80 mg/kg atRA，对照组则给予等体积的大豆油，于GD18将孕鼠处死并取出胎鼠，观察不同时间给予孕鼠atRA的胎鼠的短肢畸形情况。

At present, some theoretical procedures were proposed to investigate the energies of intramolecular hydrogen bonds for special systems, such as cis-trans method, ortho-para method, and isodesmic reaction method.

现在，已有几种方法用来计算一些特殊体系中的分子内氢键键能，例如cis-trans方法、ortho-para方法和isodesmic reaction方法。

In our results, we found four proteins have isoforms; these proteins are peptidyl-prolyl cis-trans isomerase A, prohibitin, enolase 1, myeloperoxidase precursor.

同时，我们发现肽基辅胺酸顺反异构酶（peptidyl-prolyl cis-trans isomerase A）、抑制素、烯醇酶（enolase 1）、过氧化骨髓酶有异构体的产生。

RhoGDI (RhoGDP-dissociation inhibitor 1) and Cyclophilin A (Peptidyl-Prolyl Cis-Trans Isomerase A) were reported to differentially express in two studies, but their results were inconsistent.

其中mimecan在正常结直肠组织中强表达，却在腺瘤和癌组织中不表达；TXNDC5(Thioredoxin domain-containing protein 5)在正常，腺瘤和癌组织中都表达，腺瘤和癌组织的表达量显著高于正常(P＜0.05)；RhoGDI(Rho GDP-dissociation inhibitor 1)和Cyclophilin A(Peptidyl-Prolyl Cis-Trans Isomerase A)在两份研究中报道差异表达，却都是一个报道在结直肠癌中高表达，一个报道低表达。

Serendipitous occultation is currently the only way to study the comet-size Trans-Neptunian Objects.

中文摘要外海王星天体(Trans-Neptunian Objects ，TNO)的探索和认识，是现代天文学家很感兴趣的一个课题。

This study was to investigate the impact of all-trans retinoic acid on the gene expression profile of glioblastoma cell line SHG-44, and to provide basic data for further research on gene therapy for human astrocytoma.

本研究旨在检测全反式维甲酸(all-trans retinoic acid， ATRA)处理后胶质瘤SHG-44细胞的基因表达谱改变，为进一步研究胶质瘤的基因治疗奠定基础。

This strong trans-standard Sony zoom lens offers a beautiful constant f/2.8 maximum aperture and an effective SAM fast autofocus technology for a reasonable investment. It also delivers sharp and well-corrected images in terms of distortion and vignetting. That means no post-production work would be necessary to improve the quality of images it produces

大意为，索尼这款镜头Trans-Standard变焦镜头拥有F/2.8的恒定光圈和非常高效的SAM高速自动对焦系统，他还有良好的在照片失真和抗眩晕方面的表现以及出色的照片锐度，TIPA认为使用这款索尼镜头拍摄的照片可以不必做很多后期的照片处理。

Root-bound men with nothing better to do filled the semicircle of chairs in the customers' room, listlessly watching numbers crawl by on the Trans-Lux, an electronic display of prices of major stocks.

客户室半圆形的一圈椅子上，坐满了没什么更好的事情可做的人，无精打采地看着Trans-Lux上一串串数字缓缓滑动，这是一种电子显示器，播报主要股票的价格。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。