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soil extracting
相关语句
  土壤提取
     TOXICITY OF GASOLINE IN SOIL EXTRACTING SOLUTION
     土壤提取液中汽油的毒性研究
短句来源
  “soil extracting”译为未确定词的双语例句
     Biological toxicity of two kinds of gasoline (90# and 93# ) in soil extracting solution was studied with the help of luminous bacteria.
     本文利用发光细菌法研究了土壤水提取液中2种汽油(90#和93#)的生物毒性。
短句来源
     The study was conducted with alkaline earth and saline soil extracting solutios and sea salt salution to test spirulina platensis growth and to select optimal composition of the medium.
     本试验初步研究了碱土和盐上不同土壤浸提液及海盐液对螺旋藻生长量的影响以及螺旋藻的化培养基的配方。
短句来源
     Thus, the soil extractor is a key tothe question of soil quality, and at the same time, the method of auger boring,the operation of soil extracting, the transportation and storage of soil sample,as well as the test method of sample are also of importance to the test results.
     取土器是决定土样质量的关键因素,但钻孔方法、取土操作、土样运输贮藏以及试样制备和试验方法等都对试验结果有直接影响。
短句来源
     This paper summarized ultrasound and its biological effect mechanism and its application in plant culture without soil extracting substance improving enzyme activity and transferring gene and its future perspectives in biology.
     本文概述了超声波生物学效应的产生机制,及其在植物无基质培养、生物活性物质的提取、固定化酶活性的提高及基因转导等生物技术领域中的应用及前景。
短句来源
  相似匹配句对
     THE CONDITION OF EXTRACTING AVAILABLE Cd FROM SOIL
     土壤中有效态镉提取条件探讨
短句来源
     TOXICITY OF GASOLINE IN SOIL EXTRACTING SOLUTION
     土壤提取液中汽油的毒性研究
短句来源
     FOREIGN SOIL
     外国的泥土
短句来源
     ⑥soil.
     ⑥土壤因素。
短句来源
     Extracting DNA from O.
     采用CTAB法和2种经改进SDS法提取野生稻、野燕麦、枸杞总DNA。
短句来源
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When the sporangia and hyphae of Phytophthora infestans (Mont).de Bary were placedin sterilized distilled water,potato juice,soil extract and soils under 16-22℃,the infestedwater remained infective for 38 days,the infested potato juice 40 days,the infested soil extract38 days,the infested soils 21-75 days,as assayed by inoculation of fresh potato slices.Thesoils surrounding diseased potato tubers were infective within 41-90 days after planting.Inboth cases,highest infectivity was obtained...

When the sporangia and hyphae of Phytophthora infestans (Mont).de Bary were placedin sterilized distilled water,potato juice,soil extract and soils under 16-22℃,the infestedwater remained infective for 38 days,the infested potato juice 40 days,the infested soil extract38 days,the infested soils 21-75 days,as assayed by inoculation of fresh potato slices.Thesoils surrounding diseased potato tubers were infective within 41-90 days after planting.Inboth cases,highest infectivity was obtained with moist soils at 17-22% water holding capacity.Within two weeks in water and soil extract,all hyphae disintegrated,most of the sporangiagerminated into zoospores or germ tubes and secondary spores,which then also disintegratedto give an amorphous protoplasmic mass.However,there were always some sporangia under-going various stages of chlamedospore formation.Lack of nutrients and high temperatureappeared to be inductive of the process.The persistence of the infectivity of the infestedwater and soils is,therefore,attributed chiefly to the presence of circular spores and chlame-dospores of the organism.

马铃薯晚疫病菌以薄壁圆孢子和厚垣孢子的形态存在于润湿的土壤中。保持侵染力的时间最长为75天。病种薯上的病原菌在 pH 7.5、含水率17—22%的土壤中,保持侵染力的时间是90天。病原菌在各种液体中都能形成厚垣孢子。较低的温度和较好的营养条件能延长孢囊孢子的寿命和延缓厚垣孢子的形成期。

A spectrophotometric determination of sulfate in the water extract of the alkaline soil by barium chloranate had been developed,The interferring cations were removed by shaking with cation exchange resin in sodium form and then separated by centri- fuge,The soil extract required was less than 10 ml.The HAc-NaAc buffer was selected because of its great buffer capacity and easy preparation. The recovery of the sulfate was 99.8±0.1%,The results obtained agreed very well with those obtained by...

A spectrophotometric determination of sulfate in the water extract of the alkaline soil by barium chloranate had been developed,The interferring cations were removed by shaking with cation exchange resin in sodium form and then separated by centri- fuge,The soil extract required was less than 10 ml.The HAc-NaAc buffer was selected because of its great buffer capacity and easy preparation. The recovery of the sulfate was 99.8±0.1%,The results obtained agreed very well with those obtained by gravimetric determination.The difference less than 0,01%. The analysis was completed in 30 minutes.It was more rapid when large num- ber of samples were to be analyzed and,besides,it was simple and accurate in the determination of sulfate in the alkaline soil.

本文提出了应用氯冉酸钡测定盐碱土中水溶性硫酸盐的分光光度分析方法。土壤浸提液中的干扰阳离子用钠型阳离子交换树脂振荡处理,可以避免使用氢型树脂引起 pH改变缺点。树脂的分离以及含硫酸钡、过量的氯冉酸钡沉淀与溶液的分离均采用离心的方法。所用的土壤浸提液较使用离子交换柱者为少。取交换后的溶液1-4毫升可供分析含硫酸根0.05-1.5%的土壤。缓冲溶液选用醋酸与醋酸钠,因为它易于得到,且有较大的缓冲容量。向土壤浸提液中加入硫酸根的回收率为99.8±0.1%。对八种土壤样品的分析结果与重量分析法相比其绝对相差小于0.01%。一个浸提液的分析约需半小时左右,每人每天用此法可以分析30个土壤浸提液样品的重复测定。本文还提出了回收氯冉酸钡和再生树脂的手续。本法是盐碱土中硫酸盐分析的一个比较快速、简单和准确的方法。

A new method for the simultaneous spectrophotometric determination of nitrate and nitrite in water and soil extracts by flow injection analysis with non-carcinogenic compound,α-naphthylamine-7-sulphonic acid and sulfanilamide as developing agent was proposed. An on-line cadmium-coated zinc reductor column was used to reduce nitrate to nitrite. Potassium sodium tartrate was found to promote the reaction rate. This was especially advantageous when applied to the flow injection analysis.The detection limits...

A new method for the simultaneous spectrophotometric determination of nitrate and nitrite in water and soil extracts by flow injection analysis with non-carcinogenic compound,α-naphthylamine-7-sulphonic acid and sulfanilamide as developing agent was proposed. An on-line cadmium-coated zinc reductor column was used to reduce nitrate to nitrite. Potassium sodium tartrate was found to promote the reaction rate. This was especially advantageous when applied to the flow injection analysis.The detection limits were 10μg/1 for NO_3~--N and 1μg/l for NO_2~--N.The precision was 0.7% for NO_3~--N at a level of 2mg/l and 1% for NO_2~--N at 1mg/l. The sampling rate was 60 samples per hr,i.e.120 determinations per hr.The optimization of reaction coil length,sample volume, potassium sodium tartrate concentration and reductor length were discussed.

本文提出采用流动注射技术,以分光光度计为检测器,同时测定水及土壤浸出液中NO_3~-—N和NO_2~-—N的方法。以非致癌性化合物α-萘胺-7-磺酸和磺胺为显色剂,在520nm下比色。流路中装有镀镉锌粒还原柱,把NO_3~--N还原为NO_2~--N。NO_2~--N的检出限是0.005mg/l,NO_3~--N是0.020mg/l。在含量为1mg/l时NO_2~--N的变异系数是1%;在含量为3mg/l时NO_3~--N的变异系数是0.5%。由于引入双通道交替进样旋转定容采样阀,可以交替地对同一样品进行两项测定。分析速度为60样/小时双项测定,即120次/小时。

 
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