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reference standard     
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  参考标准
     Approach of calibration method for 10V DC voltage reference standard
     对10V直流电压参考标准校准方法的探讨
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     The dilution curve of the acromegalic serum paralleled to those of the reference standard and SMC standard.
     肢端肥大症病人血清的稀释曲线与参考标准曲线和SMC标准曲线呈很好的平行关系。
短句来源
     Results Eyesight changed with reduction,stableness,improvement was reference standard of an efficacious treatment. Eyesight change for reduction,stableness,improvement was 2.2%(1/46),21.7%(10/46),76%(35/46),respectively.
     结果 视力降低 ,无变化 ,改善变化为治疗效果的参考标准 ,视力降低 ,无变化 ,改善者分别为 2 2 %(1/ 46 ) ,2 1 7%(10 / 46 ) ,76 %(35 / 46 )。
短句来源
     Results: With the highest activation rate at pH ≤2.0 as the reference standard, when the ratio of liquid sodium chlorite to hydrochloric acid was 5∶4, the pH value was ≤2.0 and the activation rate of chlorine dioxide attained over 80%.
     结果 ,以pH值≤ 2 .0时最高活化率为参考标准 ,当液体亚氯酸钠与盐酸比例为 5∶4时 ,pH≤ 2 .0 ,二氧化氯活化率达到 80 %以上 ;
短句来源
     The frequencies of HLA allele and haplotype from this study may be served as the reference standard for Jiangxi Chinese Han.
     结论江西汉族HLA-A、B、DRB1等位基因和HLA单倍型的分布特征接近南方汉族人群,但又有其自身特殊性,本研究群体的HLA等位基因频率和单倍型频率可作为江西汉族人群的参考标准
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  参照标准
     The ~(233)U and the measured sample are mixed gravimetrically, then the R_(58)=~(235)U/~(238)U and R_(38)=~(233)U/~(238)U in the mixture are measured simuhaneosly, and the R_(38) can be considered as an internal reference standard.
     ~(233)U和被测铀样按不同重量比被混合,然后,同时测量混合样中R_(58)=~(235)U/~(238)U和R_(38)=~(233)U/~(238)U,而R_(38)可被看作是内参照标准
短句来源
     The 233U and measured uranium sample are gravimetrically mixed. Then, the R5& (235U/238U) and R38(233U/238U) in the mixture are simultaneously measured, and the R38 is taken as internal reference standard.
     ~(233)U和被测铀样品按不同重量比被混合,然后,同时测量混合样中R_(58)(~(235)U/~(238)U)和R_(38)(~(233)U/~(238)U),而R_(38)可被看作是内参照标准
短句来源
     Taking EPO (7A) as a reference standard, we found that the E-OFU0 number is proportional to the EPO concentration in the medium within a dose range of 5-100 mU/ml.
     产率与EPO浓度(在5~100mu/ml范围内)呈高度正相关。 以EPO(7A)为参照标准,用E-CFU。
短句来源
     The assay used UDSA-cLH-K-3 as reference standard, UDSA-cLH-I-3 as radio labelled ligand, rabbit anti-chicken LH(UDSA-AcLH-5) as first antibody, and donkey anti rabbit antiserum as second antibody.
     所用LH参照标准为USDA-cLH-K-3,碘化标记LH为USDA-cLH-I-3,第一抗体为兔抗鸡LH(USDA-AcLH-5),第二抗体为驴抗兔血清。
短句来源
     Then two difficulty problems of the combination between hard and soft evaluation and confirmation of reference standard and dynamic standard were discussed.
     本文还讨论了设置教育现代化指标体系中硬评价与软评价的结合、参照标准和动态标准的确定两个亟需解决的难题。
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  标准参考
     Analyses of rock reference standard samples of various uranium contents (0.95, 84.8, 669 and 7240 ppm) by the present method were given with relative standard deviation<5%.
     本法对不同含量铀(0.95,84.8,669和7240ppm)的岩石标准参考样品进行分析,其RSD均小于±5%。
短句来源
     When DSA was used as the reference standard, one patient with intracranial aneurysm (ICA) occlusion was diagnosed correctly by CTA, which was misinterpreted as 50% stenosis by US.
     以DSA为金标准参考时,CTA正确诊断1例颈内动脉完全闭塞,但被US低估为50%狭窄。
短句来源
     Results The accuracy of the method was evaluated by the results of determination of reference standard substances in whole blood and th e recovery rates of adding standard solu-tion. The results agreed well with the reference values. The recovery rates of23trace elements obtained by adding standard method were in the range of73.4%-118.9%except Cd and Hg with lower recovery rates.
     结果根据全血标准参考物质的分析结果及标准溶液的加标回收率评价了方法的准确度,23种元素除Cd、Hg偏低外,其余元素加标回收率在73.4%~118.9%之间,测定值与参考值吻合。
短句来源
     The results have been checked with the reference standard material for environment radioactivity provided by NBS,USA.
     用NBS提供的环境放射性标准参考物质进行了检验。
短句来源
     The mean of MDA acted as reference standard, quantity of MDA acted as independent variable, the up-related 10 factors acted as dependant variable, Logistic regression analysis was used to explore the main influence factors.
     以接尘人员MDA负荷分类(设大于或小于标准参考值的二分变量)为应变量,以被调查的10个可能影响因素为自变量,运用成组资料的非条件Logistic回归分析模型拟合回归曲线,探寻主要影响因素。
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  参考标准液
     QUALITY EVALUATION AND PRIMARY USES OF THE HICN REFERENCE STANDARD MADE IN OUR LABORATORY
     自制氰化高铁血红蛋白参考标准液的质量评价及初步应用
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  reference standard
The described variant of the indentation method requires the preliminary calibration against a reference (standard) glass; i.e., it is a relative method.
      
The obtained values of the parameters can be used in practice as reference standard.
      
The procedure accuracy was evaluated by determining germanium in a reference standard sample of steel after preliminary separation by solvent extraction.
      
IUPAC Recommendations for Reference Standard Samples in pH Measurements
      
WPC 80, sodium caseinate and their hydrolysates were high-quality proteins and had a surplus of essential amino acids compared with the FAO/WHO/UNU (1985) reference standard.
      
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Since 1954 in authors' laboratory, various digitalis preparations, including digitalis leaves, tablets and tinctures and digitoxin and its injections, were assayed by both guineapig method and pigeon (lethal dose) method, using standardized digitalis powder as reference standard. It was found that results of digitalis leaf preparations obtained by guinea pig method and those by pigeon method were reasonably agreeable; while the results of digitoxin preparations obtained by guinea pig method were always...

Since 1954 in authors' laboratory, various digitalis preparations, including digitalis leaves, tablets and tinctures and digitoxin and its injections, were assayed by both guineapig method and pigeon (lethal dose) method, using standardized digitalis powder as reference standard. It was found that results of digitalis leaf preparations obtained by guinea pig method and those by pigeon method were reasonably agreeable; while the results of digitoxin preparations obtained by guinea pig method were always significantly lower than those obtained by pigeon method. In this paper, these facts were again shown, when 6 digitalis leaf preparations and 7 commercial digitoxin preparations were investigated. In digitoxin preparations, the potency estimated by pigeon method could be 2.36 times greater than that estimated by guinea pig method. The authors ascribed the difference to the inadequate standard preparation employed in the assay, as digitalis purpurea consisting of chiefly purpurea glycosides A and B being different in the mode of action to digitoxin (commercial) which was chiefly degraded product of purpurea glycoside A. They concluded that in bioassay of digitoxin against a digitalis standard, a suitable authorised method should be strictly followed; and the 4 methods employing different kinds of animals recommended by British Pharmacopeia 1953 and quoted by Bristish Pharmacopeia Codex 1954 for digitoxin would make confusions.

1、本文用豚鼠法和鸽法比較了6种国产洋地黄粉、2种国产洋地黄毒甙和5种进口洋地黄毒甙的生物效价,用洋地黄粉作标准品。 2、洋地黄粉用两种方法測定的結果比較接近。洋地黄毒甙相差达一倍,鸽法的結果较高,此种較大的差异,显然是与样品和标准品在成分上的不同有关。 3、本文指出英国副藥典(1954)对洋地黃毒甙的检驗,叫种方法并列,并以洋地黄叶粉为标准品是有問題的。作者考虑到如果用一定純度的洋地黄毒甙作为生物检定的标准品时,各法可以并用,否則应按一种規定的方法进行。本室張淑坤、赵秀文、周海鈞三位同志曾参与本文一部分实驗工作。

The main purposes of this investigation are to observe the characterestics of the secretion of both the mucosa of greater and lesser curvatures of the stomach and to evaluate the relative importance of vagus nerves on the secretory activity of the two parts of the stomach by means of hypoglycemia induced by insulin. Four chronic experimental dogs provided with both greater and lesser curvature Pavlov pouches made after the procedure described by Thomas were used. The effect of histamine was also determined for...

The main purposes of this investigation are to observe the characterestics of the secretion of both the mucosa of greater and lesser curvatures of the stomach and to evaluate the relative importance of vagus nerves on the secretory activity of the two parts of the stomach by means of hypoglycemia induced by insulin. Four chronic experimental dogs provided with both greater and lesser curvature Pavlov pouches made after the procedure described by Thomas were used. The effect of histamine was also determined for comparative purposes. The main results are as follows: (1) Under insulin hypoglycemia, the latent period of the secretion of lesser curvature pouches is always shorter than that of the greater curvature pouches whereas the secretion rate and the concentration of both acid and pepsin are genrally higher in the gastric juice of lesser than in that of greater curvature pouches. (2) When the effect of histamine is used as a reference standard, it appears that the degree of increase in secretion rate and in concentration of acid is essentially similar in the two kinds of pouches under insulin hypoglycemia. Furthermore, insulin hypoglycemia is rather a strong stimulant for pepsin production in both the mucosa of greater and lesser curvatures, although the pepsin concentration is generally higher in the juice of the pouches of the latter than in that of the former. (3) From the above results and since the mechanism of the secretory effect of insulin is that hypoglycemia stimulates gastric secretion via the vagus nerves, we believe that so far as the nervous influence on the secretory activity of stomach is concerned, the vagal supply plays a chief role in both the greater and the lesser curvatures. This idea is at variance with that of Soloviev who believed that the vagus nerves play a chief role only in the secretory activity of the lesser curvature while the sympathetic nerves play a chief role in that of the greater curvature of the stomach.

本工作在4只同时具有胃大弯与小弯托馬斯氏小胃的慢性实驗狗身上,进行了21次有关胰島素性低血糖对胃液分泌的观察,并与注射組織胺的作用进行比較,結果如下: (一)在胰島素性低血糖的作用下,小弯分泌的潛伏期比大弯为短,而在分泌量、酸度和消化力方面,小弯一般也都高于大弯。 (二)如以組織胺引起的大、小弯小胃的反应为准,进行比較,則在胰島素性低血糖的作用下,胃大弯部与小弯部分泌的量和酸度,有大致相同程度的增加。 (三)胰島素性低血糖对大、小弯粘膜的胃酶細胞,均有相当強的刺激作用。 (四)根据以上結果,我們认为,迷走神經无論在胃小弯部或大弯部的分泌活动中都似起着主要的作用。

As reported previously, the stem-, root- and rhizome-barks of the plant Periploca sepium Bge.(Asclepiadaceae) contain cardiac glycosides and a highly active total glycosidal preparation has been prepared from it. In order to determine the distribution and seasonal variation of the cardiac glycosides in the different parts of the plant, it was necessary to study the assay methods. Spectrophotometric methods based on the Kedde's reaction and Baljet's reaction as well as biological method using frog as test animal...

As reported previously, the stem-, root- and rhizome-barks of the plant Periploca sepium Bge.(Asclepiadaceae) contain cardiac glycosides and a highly active total glycosidal preparation has been prepared from it. In order to determine the distribution and seasonal variation of the cardiac glycosides in the different parts of the plant, it was necessary to study the assay methods. Spectrophotometric methods based on the Kedde's reaction and Baljet's reaction as well as biological method using frog as test animal were studied and detailed procedures proposed. The method based on Kedde's reaction is carried out as follows: 5ml of decolorized tincture of the plant material(prepared according to Rawson)is mixed with 5ml of the reagent (2% 3,5-dinitrobenzoic acid in methanol mixed with equal volume of 1 N potassium hydroxide solution just before use). Determine the extinction in 5—12 minutes at 530mμ. Use a mixture of 6.4% ethanol and the reagent (1:1) as blank.Calculate the percentage content from the standard curve prepared with a reference standard. Either a total glycosidal preparation or a stem-bark powder of definite glycosidal content may be used as the reference standard. It was found that (1) the reagent prepared with methanol as solvent is paler in colour and more stable than that prepared with ethanol; (2) the tincture after mixing with the reagent showed an absorption peak at 530 mμ and the colour is deepest and most stable in 4—12 minutes; (3)the concentration-absorption relation obeys Beer's law and the curve is a straight line. The deviation coefficient(P=0.05) of the mean extinction of two determinations was found to be ±4.25%. The method based on Baljet's reaction is carried out as above with the following modifications:(1)the reagent used is 1% picric acid aqueous solution mixed with 10% sodium hydroxide solution(9:1);(2)the tincture after mixing with the reagent showed an average absorption peak at 505 mμ(varied between 500—510 mμ with glycoside concentration) and the colour is deepest and most stable in 40—80 minutes; (3) the concentration-absorption relation does not strictly obey Beer's law and the curve is not a straight line. The deviation coefficient(P=0.05)of the mean extinction of two determinations was found to be±2.29%. The frog method of biological assay described in the Soviet Pharmacopoeia was found to be suitable with the following modifications: (1) the male frog, Rana nigromaculata, common in north China is used as test animal; (2) a reference standard preparation is determined for LD_(min) at the same time and the relative minimum lethal dose calculated.The deviation coefficient (P=0.05) was found to be: for single determination,±10.24%; for the mean of two determinations, ±7.24%. When plant material of low glycosidal content is used for the assay, the tincture prepared may be concentrated on a boiling water-bath without significant loss of potency: By comparing the conformity of results between the chemical and biological methods,it was found that the method based on Kedde's reaction is superior to that based on Baljet's reaction.

为了比较萝藦科植物杠柳(Periploca sepium Bge.)在不同时期植物体各部分中强心甙的含量,以便选择适宜的采收时期、采收部分和干燥方法,作者对利用Kedde反应和Baljet反应的强心甙化学测定法以及利用国产黑斑蛙(Rana nigromaculata)为实验动物的生物测定法的实验条件进行了研究。提出了具体的操作方法,并对这些方法的精密度以及化学测定法和生物测定法的结果互相符合的程度进行了比较。

 
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