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improved method     
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  改进方法
     Improved method of NH_4-N determined by hypobromite oxidation in water
     次溴酸盐氧化法测定水中NH_4-N的改进方法
短句来源
     Arithmetic coding and Its Improved Method in H.264/AVC
     H.264/AVC中的算术码及其改进方法
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     In this paper,it is Proved that for an arbitrary given real matrix A= (α_(ij)) of order 6,where |α_(ij)≤1,P_n is less than 6.7883 and an improved method of estimating P_n is given for an arbitrary general real matrix of order n.
     本文证明了对任意一个给定的6阶实阵 A=(a_(ij)),若其中|a_(ij)|≤1,则有 P_6<6.7883.对于一般 n 阶矩阵,本文给出了估计 P_n 的一个改进方法.
短句来源
     An improved method for the methylation of fulvic acid(FA)withAg_2O-CH_3I is proposed.
     研究了一种用Ag_2O-CH_3I甲基化黄腐酸的改进方法
短句来源
     Two improved method are described for the preparation of crystalline tetrachlorodie- thylenediplatinum [Pt (C2 H4) Cl2 ]2. In the courte of our experimetal work.
     本文介绍了两种制备四氯二乙烯合二铂(Ⅱ)[Pt(C2H4)Cl2]2的改进方法
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  方法改进
     Improved method for (22E,24R)-3α-5-cyclo-5α-ergosta-7,22-dien-6-one synthesis
     (22E,24R)-3α-5-环-5α-麦角甾-7,22-二烯-6-酮的合成方法改进
短句来源
     Improved method for synthesis of 4-tolyl-2,2′:6′,2″-terpyridine
     对甲苯基-2,2′:6′,2″-三联吡啶的合成方法改进
短句来源
     An improved method for the synthesis of 2,5-dimercapto-1,3,4-thiadiazole
     2,5-二巯基-1,3,4-噻二唑合成方法改进
短句来源
     An Improved Method for the Synthesis of 2 - Methyl - 4' - nitrodiphenyl Ether
     2-甲基-4’-硝基二苯醚合成方法改进
短句来源
     A STUDY ON IMPROVED METHOD FOR DETERMINATION OF RESIDUAL CHLORINE IN WATER FOR ISO 7393/2
     国际标准(ISO7393/2)测定水中余氯方法改进的研究
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  改良法
     Results Normal rCBFs calculated with our improved method and with the conventional one were (70.01±7.64) ml·min~ -1 ·100 g~ -1 , (34.85±1.82) ml·min~ -1 ·100 g~ -1 , respectively in the gray matter. Normal rCBFs in the gray matter had significant difference between two methods (t=12.64, P<0.01).
     结果改良法和传统法得出的正常脑灰质的rCBF分别为(70.01±7.64)ml·min-1·100g-1、(34.85±1.82)ml·min-1·100g-1,两种方法间差异具有显著性统计学意义(t=12.64,P<0.01);
短句来源
     Normal rCBFs calculated with our improved method and with the conventional method were (24.85±3.72) ml·min~ -1 ·100 g~ -1 , (12.88±1.75) ml·min~ -1 ·100 g~ -1 , respectively in the white matter. The normal rCBFs in the white matter showed significant difference between two methods (t=8.23, P<0.01).
     改良法和传统法得出的正常脑白质的rCBF分别为(24.85±3.72)ml·min-1·100g-1、(12.88±1.75)ml·min-1·100g-1,两者差别亦有显著性统计学意义(t=8.23,P<0.01)。
短句来源
     The Clinical Value of Determining 24 hours Urine E_3 and Random Urine E/C Ratio from Pregnant Women with the Improved Method
     改良法测定孕妇24小时尿E_3及随意尿E/C比值的比较
短句来源
     Methods:Kado-lius improved method.
     方法 :采用 Kado- liu改良法提取质粒 DNA,琼脂糖电泳。
短句来源
     Methods:Amniotic fluid,which was extracted from pregnant women during 16~30th weeks gestation(n=138) was inoculated and cultured by all nutrition culture medium (4ml) and amniotic fluid cells mixed liquid (5ml),then they were gathered to set up chromosome according to improved method in proper time.
     方法 :抽取 138例孕16~ 30周孕妇的羊水 ,用全营养培养基 4ml+羊水细胞混悬液 5ml接种培养 ,适时改良法原位收获制片、分析。
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  改良方法
     Results The Kd values measured with this improved method under two different conditions were 2.61×10-12 mol/L and 2.39×10-12 mol/L, and those with Friguent method in these two conditions were 5.57×10-10 mol/L and 1.41×10-10 mol/L, respectively.
     结果用改良方法在两次不同条件下检测抗IL-8单抗的Kd值分别为:2.61×10-12mol/L和2.39×10-12mol/L,而使用Friguent方法在两次不同条件检测抗IL-8单抗的Kd值分别为:5.57×10-10mol/L和1.41×10-10mol/L。
短句来源
     The experiments showed that the quality of DNA extracted by this improved method was much higher,DNA stripes were very clear without tagging,the concentration was 1.5397-2.1039μg/L and OD_(260)/OD_(280) was 1.6913-(1.8025).
     该方法具有快速、简易和环境友好的特点。 试验表明,该改良方法所提DNA凝胶条带清晰,无拖尾,浓度在1.5397~2.1039μg/L之间,OD260/OD280检测值在1.6913~1.8025之间,所提DNA适用于PCR,PCR结果理想。
短句来源
     An improved method of high-resolution G-banding preparation technology of chromosome
     高分辨染色体G显带制备技术的改良方法
短句来源
     RESULTS The adopted improved method was preferable, the recovery is increasing respectively 12%~13.76% and 7.00%~7.39% then other common method, and the recovery was validated up to 98.48% by internal standard method.
     结果在内标试验中改良方法的回收率高(可达98.48%),比采用常规酸解法(GB/T18246-2000)提高了12%~13.76%,比乙醇回流-水提法提高7.00%~7.39%。
短句来源
     An Improved Method of Soybean DNA Rapid Extraction for PCR Utilization
     用于PCR的大豆DNA快速提取改良方法
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  improved method
We used an improved method of increasing ICP to establish a stable BD model.
      
An improved method of photometric determination of cyclodextrin glucanotransferase activity
      
An improved method for assaying of the total endodepolymerase activity of pectinases has been developed.
      
On the basis of [1] an improved method was developed which, within the framework of the model of an ideal gas, allows one to calculate the flow in ejector nozzles without a limit on the coefficient of ejection.
      
The use of an improved method of numerical solution [3] has made it possible to advance into the region of large temperature differences.
      
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The current methods for the preparation of ethyl orthosilicate do not give satisfactory results.It is found that the low yield is due to the use of excess alcohol,which,in presence of hydrogen chloride,produces water and causes the ethyl orthosilicate to undergo a hydrolytic polycondensation.The condensation products have been isolated and identified as 1,3-hexaethoxydisiloxane and 1,3,5- octaethoxytrisiloxane. An improved method,consisting of the addition of equivalent quantities of silicon tetrachloride...

The current methods for the preparation of ethyl orthosilicate do not give satisfactory results.It is found that the low yield is due to the use of excess alcohol,which,in presence of hydrogen chloride,produces water and causes the ethyl orthosilicate to undergo a hydrolytic polycondensation.The condensation products have been isolated and identified as 1,3-hexaethoxydisiloxane and 1,3,5- octaethoxytrisiloxane. An improved method,consisting of the addition of equivalent quantities of silicon tetrachloride and anhydrous ethyl alcohol into ice-cold ethyl orthosilicate as diluent,is recommended.The reaction mixture gives 95% of theoretical yield of the ethyl orthosilicate.

现行文献中所载原矽酸乙酯的制备法,其产率均不能使人满意。我们找出产率不高的主要原因是过量的醇和作用所发生的氯化氢生成了水,水引起了原矽酸乙酯的水解缩聚作用。这已经由实验证明。作用副产物亦经纯化鉴定,主要的是1,3-六乙氧基二矽氧烷和1,3,5-八乙氧基三矽氧烷。改进的制备法是将等作用量的四氯化矽和无水乙醇(克分子数比为1:4)同时滴入冷却的、受搅拌的原矽酸乙酯(作为稀释剂)中,经搅拌半小时,即徐徐加热以除去氯化氢,然后蒸馏。这样,原矽酸乙酯的产率达95%。这个方法并适用于连续操作。

In the improved method, after the phosphorylation reaction had approached equilibrium, a few ml, of phosphoric acid and 2 volumes of 95% ethyl alcohol was then added, (final pH approches 4.0). At this pH, inorg, phosphate is chiefly in the form KH_2PO_4, which is insoluble in alcohol and precipitated together with starch and proteins. (the p'p't may be used again for the preparation of G-1-P) and the filtrate was then made alkaline to phenol red. A p'p't of pot. salt of G-1-P was formed together with some...

In the improved method, after the phosphorylation reaction had approached equilibrium, a few ml, of phosphoric acid and 2 volumes of 95% ethyl alcohol was then added, (final pH approches 4.0). At this pH, inorg, phosphate is chiefly in the form KH_2PO_4, which is insoluble in alcohol and precipitated together with starch and proteins. (the p'p't may be used again for the preparation of G-1-P) and the filtrate was then made alkaline to phenol red. A p'p't of pot. salt of G-1-P was formed together with some inorg, phosphate, which could be removed by satd. magnesia mixt. The product of G-1-P was recrystallized, if desired.

1.制备α-葡萄糖-1-磷酸酯钾盐时省去抑制剂,并未发现对平衡速率和G-1-P产量的影响。 2.利用G-1-P与钾的磷酸盐在pH=4.2时在酒精中溶解度的不同,大为简化了制备G-1-P的方法,所得的产品纯度也高。

The application of Cu-Pan system EDTA titration of some cations was reinves-tigated systematically. The influence of various factors such as pH, temperature, quantity of indicator used, was studied in some detail. The stability constants of Cu-PAN complex were found to be 1.4×10~6, at pH 2; 1.9×10~6, at pH 4; 1×10~5, at pH 6; 7.5×10~4, at pH 8; and 2.1×10~5, at pH 10. Based upon the above observations an improved method was suggested as follows: Dissolve a certain amount of salt sample in distilled water...

The application of Cu-Pan system EDTA titration of some cations was reinves-tigated systematically. The influence of various factors such as pH, temperature, quantity of indicator used, was studied in some detail. The stability constants of Cu-PAN complex were found to be 1.4×10~6, at pH 2; 1.9×10~6, at pH 4; 1×10~5, at pH 6; 7.5×10~4, at pH 8; and 2.1×10~5, at pH 10. Based upon the above observations an improved method was suggested as follows: Dissolve a certain amount of salt sample in distilled water or dilute hydrochloric acid to make a solution of about 0.02 M. in concentration. Pipette 10 ml. of this solution accurately into a beaker. Add 5 ml. of acetate buffer or other suitable buffer as required for the specified sample. About 20% excess of standard disodium EDTA solution is added and then 10—15 ml. of alcohol. Titrate with 0.02 M. standard Cu~(++) solution until the color of the solution changes from yellow to orange red, using 5—10 drops of 0.1% of methanolic solution of PAN as indicator. The method gave a more distinct end point in determination of Ba~(++) and Cr~(+++) in comparison with the method using Eriochrome black T as indicator.

本文重新研究了EDTA絡合量法中用Cu-PAN系統滴定Ca~(++),Ba~(++),Mg~(++),Al~(+++),Cr~(+++),Zn~(++),Fe~(+++),Pb~(+++),Bi~(+++),Hg~(++),Cu~(++)等的pH、溫度、指示剂用量等条件,测定准确度为1%.建立了用Cu-PAN系統滴定鉻盐及鋇盐的方法,測定終点較用鉻黑T指示剂明显.測定了Cu-PAN絡合物的組成为1:1,稳定常数为:pH2,1.4×10~6;pH4,1.9×10~6;pH 6,1×10~5;pH 8,7.5×10~4;pH 10,2.1×10~5.根据这些結論,改进了Cu-PAN系統的滴定方法。

 
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