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exposure
相关语句
  相似匹配句对
     EXPOSURE
     曝光台
短句来源
     The Exposure Standard
     曝光量标准
短句来源
     (4) Control of potential exposure;
     4)潜在照射的控制;
短句来源
     (3) Chronic exposure and action level;
     3)慢性照射和行动水平;
短句来源
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  exposure
Their cytotoxic properties were determined by a 3-day continuous exposure MTT assay with murine melanoma B16 cells.
      
coli) and photo-bacteria were used as samples, the antibacterial effect of stainless steel was very weak, while the percentage of bacteria dying from exposure to metallic copper for 30 min was over 90%.
      
popularis increased markedly over the increase of the duration of exposure to salinity, and culminated after 28 days of salt stress.
      
Good control over the grating's reflectivity and the separation of the two Bragg wavelengths is enabled by adjusting the stretch, the length of the grating, and the exposure.
      
According to the percentage of damaged DNA with tail and its TL/D (tail length to diameter of nucleus) value, the relationship between DNA damage degree and heavy metal dose and exposure time was determined.
      
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The principal object of this paper is to present a direct method of finding the elevation of the exposuae station and conseqently the tilt and the swing, if desired, of an aerial photograph. Since the elevation of the exposure station is found, the plumb-line coordinate system can, in the sense of numerical calculation, be established however. The determination of the plumb-line coordinate system, relating to three ground control points and their cooresponding images on the photograph, means a determination...

The principal object of this paper is to present a direct method of finding the elevation of the exposuae station and conseqently the tilt and the swing, if desired, of an aerial photograph. Since the elevation of the exposure station is found, the plumb-line coordinate system can, in the sense of numerical calculation, be established however. The determination of the plumb-line coordinate system, relating to three ground control points and their cooresponding images on the photograph, means a determination of the position of the photograph in space. As can be seen the plumb-line coordinate system is definitely independent of the swing of an aerial photograph, the swing is not necessary in solving the space resection problem as the classical procedure done.The treetment in this problem involves only simple computations and produces exceptionally accurate results, as indecated in a numerical calculation during the preparation of this paper. Owing to the impossibility of publishing the numerical example in whole length, only the final results are referred here for comparing:

本文的目的,在於推導出一直接的算學方法,以求空中攝影的高度,進而求出其像片的倾角;如有必須時也求出像片的旋角來,但在本文的理論推導過程中,過去一般認為要先解决旋角的問題,而後才能解決空間定位問题的歷史看法,已經完全修正;旋角並不是解决空間定位問題所必須的。因為攝影高度既經决定,我們可以建立一垂綫坐標系,與像片在空間的轉動無關。每一像點在此垂綫坐標系上的關係完全可以藉攝影高度的得知而決定;此種關係的決定即相當於像片在攝影瞬間的空間位置的决定。這對於無論是像片的糾正、製圖、交會定點都是非常有幫助的。本文所論的方法,經數字計算的結果,表明精度是很高的,而計算手續也是簡便的。由於避免篇幅過長故未將全部計算例引出,只在此地列出一結果以相比較:

Various procedures for spectrographic analysis of metallurgical slags have been found inthe literature,but,in practice,results are often influenced by the chemical nature of the samples.This paper reports some results obtained on the spectrographic analysis of open-hearth slags bythe copper cup-electrode solution method.An activated a.c.arc (ПС-39) is used as light source.To the nitric acid solution ofslag samples is added stannous chloride (Sn as internal standard) and potassium bromide (Kfor the stablization...

Various procedures for spectrographic analysis of metallurgical slags have been found inthe literature,but,in practice,results are often influenced by the chemical nature of the samples.This paper reports some results obtained on the spectrographic analysis of open-hearth slags bythe copper cup-electrode solution method.An activated a.c.arc (ПС-39) is used as light source.To the nitric acid solution ofslag samples is added stannous chloride (Sn as internal standard) and potassium bromide (Kfor the stablization of the arcing).The prepared solution is then treated in a hot water-bath.The size and shape of the cup-electrode is so chosen that the height of the solution surface doesnot vary much during exposure.Because of the non-uniform distribution of the elements tobe analysed in the arc column,the slit is illuminated directly from the arc without using lenses.With fixed working curves we have obtained the lime-to-silica ratio of 20 slag samples.The differences between spectrographic and chemical values are less than ±5%.The completeanalysis of a few slag samples has been also carried out and the accuracy is found to be aboutthe same as those published in the literature.Causes for shifts of working curves in the course of experiments and means of prevention,and the problem of the dissolution of slags in nitric acid are discussed.Experiments indicatethat the turbulent effect of solution samples in the cup-electrode during arcing is advantageousand necessary.

本文叙述用杯形铜电极溶液法进行平炉渣光谱分析的一些结果。实验用ПС-39型交流电弧作光源,硝酸溶解渣样,加 SnCl_2(Sn 作内标)和 KBr(K 作燃烧稳定剂),并且把这溶液经过加热处理。再适当地选定了铜杯的大小和形状,和采用了直接照明系统。用固定定标曲线法作了20个渣样的硷度(Ca/Si)分析。与化学分析结果比较相差小于±5%。最后讨论了铜杯溶液法进行分析时定标曲线发生移动的原因和防止的方法,试样在硝酸溶液中溶解的问题,与试样溶液在燃烧过程中的翻腾现象。致谢:参加本项工作一部分的尚有周熙宁、徐升美、王桢枢等同志,谨此致谢。

Intraperitoneal injections of 6stibonic acids and their relative compounds derived from sulfa-drugs, 3 dithiastibiols, 2 organotin compounds and 1 organomercury compound were studied for their therapeutic activities against schistosomiasis japonica in white mice. The LD_(10), LD_(50), or the minimal lethal doses were used for treatment, which was begun 5 weeks after exposure to 40 cercariae per mouse. The injections were given once daily for 14 days, and, after a holding period of another 14 days, the...

Intraperitoneal injections of 6stibonic acids and their relative compounds derived from sulfa-drugs, 3 dithiastibiols, 2 organotin compounds and 1 organomercury compound were studied for their therapeutic activities against schistosomiasis japonica in white mice. The LD_(10), LD_(50), or the minimal lethal doses were used for treatment, which was begun 5 weeks after exposure to 40 cercariae per mouse. The injections were given once daily for 14 days, and, after a holding period of another 14 days, the mice were autopsied. Basing on the average number of worms remained in each mouse, the therapeutic effects of out of the 12 compounds were better than that of tartar emetic.

用小白鼠腹腔注射6種磺胺類脯酸化合物及其衍生物、3種硫銻類環狀化合物、2种锡剂及1種汞剂。先測定各藥之LD_(10)、LD_(50)或最小致死量,然後用以治疗血吸蟲病鼠。每鼠感染40條尾蚴,5週後開始治療,給藥14天,停藥14天,然後解剖。平均每鼠餘存蟲數作为療效比較的主要標準。結果發現的療效較吐酒石为佳。

 
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