左旋

A solution of one stereoisomer of a given monosaccharide rotates plane-polarized light to the left and is called the levorotatory isomer, designated

一特定单糖的一种立体异构体溶液使平面偏振光向左旋转称为左旋，标记为

A solution of one stereoisomer of a given monosaccharide rotates plane- polarize d light to the left and is called the levorotatory isomer, designated

一特定单糖的一种立体异构体溶液使平面偏振光向左旋转称为左旋，标记为

9 cases of levoversion and 3 cases of isolated levocardia were investigated.

分析探讨左旋心和孤立左位心的诊断和外科治疗。

There was 4.8±1.7 mean abnormalities in levoversion, 3.0±1.7 in isolated levocardia.

左旋心平均心血管畸形数为4.8±1.8，孤立左位心为3.0±1.7。

Levoversion and isolated levocardia usually accompany with several defects in cardia.

左旋心和孤立左位心的诊断主要依靠肺门切层片或高KV胸片和胸腹部平片。

Conclusions】①Levoversion and isolated levocardia were diagnosed mainly by hilum-tomography/high KV chest plain film and thoracic-abdominal plain X-ray.

①左旋心和孤立左位心的诊断主要依靠肺门切层片或高KV胸片和胸腹部平片。

The diagnoses of levoversion and isolated levocardia could be confirmed only by hilum-tomography or high KV chest plain film and thoracic-abdominal plain X-ray, which can give the morphology of bronchi, the position of the liver and the direction of the apex, because there is a constant relation between bronchi, venous atria and great lobe of liver.

总结了9例左旋心和3例孤立左位心的临床资料，对其诊断和治疗进行了分析。

It is interesting to note that two kinds of Swastikas, one revolving to the right and other to the left have been excavated from a tomb in Aladja-Hoyuk.

注意到从Aladja-Hoyuk坟墓中挖掘出来的两种纳粹党所用的十字记号这是很有趣的，一个右旋而另一个左旋。

The main component dehydroabietic acid and little component abietic acid, neoabietic acid, levopimaric acid and pulustic acid of a few types disproportionated rosin were determinated quantitatively by selecting the proper order of derivative, differential wavelength difference, scanning rate and quantitative method.

通过选择合适的求导阶数、微分波长差、扫描速度和定量方法，对不同批号的歧化松香中的主成分脱氢枞酸和微量组分枞酸、新枞酸、左旋海松酸及长叶松酸进行了测定(其中左旋海松酸和长叶松酸测定的是合量)，实验结果令人满意。

Binary linear polarization is used by all Chinese communication satellites, and binary circular (right-hand and left-hand) polarization is often used by some IntelSat and some Russian satellites in C-band.

中国通信卫星都采用由垂直极化和水平极化构成的双线极化频率复用方式，国际卫星组织和俄罗斯的一些C频段卫星则采用由左旋极化和右旋极化构成的双圆极化频率复用方式。

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。