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chronic test
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  慢性试验
     Depended on the population of the first brood,the LOEC and NOEC were 160 and 80μg/L in the chronic test,respectively,which were similar to those in 19d subchronic test(200 and 100 μg/L).
     依据第1胎所产幼溞数求得的最低可观察效应浓度(LOEC)和无可观察效应浓度(NOEC),在慢性试验中分别是160和80μg/L,在19d亚慢性试验中分别为200和100μg/L,二者相近。
短句来源
     At 25-26℃,the first instar(less than 24h old)D. magna was used in the acute and chronic toxicity tests. The duration of the chronic test was 20 d.
     急性和慢性试验均使用小于一日龄的幼溞,试验温度为25─26℃,慢性试验进行了20d。
短句来源
     In chronic test(7 days)considering three criteria as a whole,the no-observed-effects concentrations(NOECs)were justified as 0。 0625mg/Land the lowest-observed-effects concentrations(LOECs)were 0.125mg/L,Theapplication factors were deterlnined within the range of 0.15一0.30. Results oftest showed that toxicity of K_2Cr_2O_7 to C.
     慢性试验以存活、生殖和生长为毒性指标,未觉察反应浓度(NOEC)为0.0625mg/L,最低觉察反应浓度(LOEO)为0.1250mg/L,其应用系数在0.15一0.30之间。
短句来源
     In 14 day chronic test,both survival and growth of D.
     慢性试验进行了14天,对存活和生长,pH值1.75有影响,pH值5.0没有影响;
短句来源
  “chronic test”译为未确定词的双语例句
     The result show that the 48h EC50 of three new type fungicide are 72.94mg/L、8.83 mg/L and 0.30 mg/L, the acute toxicity is Flumorphchronic test, when the concentration of SYP-1620 was 0.10mg/L, it can prolong Daphnia magma’s days to first pregnancy and influenced its growth significantly.
     研究结果表明三种杀菌剂的48h EC50 分别为:72.94mg/L、8.83 mg/L、0.30 mg/L,其毒性大小为:氟吗啉
短句来源
     magna, EC50 being 6 -7mg·l-1. The results of chronic test disclosed that low concentration of DBF stimulated the growth and reproduction of D.
     DBP对大型蚤的捕食行为产生抑制,EC_(50)在 6—7mg·1~(-1)之间.
短句来源
     No toxic responses were found in chronic test in rats of both sexes at doses of 5000mg/kg,10000mg/kg and 20000mg/kg.
     大鼠长期毒性试验 ,用 5 0 0 0 m g/ kg、1 0 0 0 0 m g/ kg、2 0 0 0 0 m g/ kg.
短句来源
     The data from chronic test indicated that LOEC is 10ug/L, and NOEC is 5ug/L. The chronic test is far more sensitive than acute test.
     慢性毒性试验结果表明,久效磷的最低察觉反应浓度(LOEC)为10μg/L,未察觉反应浓度(NOEC)为5μg/L,试验还表明慢性毒性试验远比急性毒性试验的方法敏感。
短句来源
     And also the data with 21-days chronic test for Zhejiang Road with D.
     同时经过21天大型蚤慢性毒性试验,浙江路河段在第一次产仔的天数,第一次产仔数上与对照有着显著的差异,表明的该段河水对大型蚤具有一定的生理影响。
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  相似匹配句对
     (v) test;
     第五章为测试过程;
短句来源
     In Test
     iM测试
短句来源
     Test of Chronic Toxicity of TPP in Rats
     茶多酚对大鼠长期毒性实验
短句来源
     In Vitro Serum Test for Chronic Urticaria
     慢性荨麻疹患者血清过敏原IVT检测
短句来源
     Chronic Pancreatitis
     慢性胰腺炎
短句来源
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  chronic test
Elutriate toxicity shows no apparent relationship between the acute and chronic test, indicating that population growth inhibition cannot be derived directly or predicted from14 C-fixation.
      
Toxicity was determined using Ceriodaphnia dubia 48-hour acute and 7-day chronic test protocols.
      
Calculation of an acute test/chronic test ratio for fathead minnows, flagfish, and daphnids (fed and unfed) resulted in a range of values from 1.64 to 4.80.
      
Toxicity identification evaluation using a short-term chronic test with Ceriodaphnia dubia
      
Application of the short-term chronic test with Ceriodaphnia dubia in identifying sources of toxicity in industrial wastewaters
      
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The toxicity of mercuric chloride (as Hg~(++)) to Daphnia magna was studied under renewed static conditions. Under 25±℃ and 9—10 hour dialy lighting (3,000—3,300 lux), Daphnia magna, derived from a pure strain and aged 6±6 hours, were exposed to 1—28μg Hg/L. Experiment of each concentration was carried out by means of ten beakers, each containing 50ml of filtered water and a single Daphnia. Scenedesmus obliquus was provided for the animals throughout the experiments.The LC_(50) of mercuric chloride to D. magna...

The toxicity of mercuric chloride (as Hg~(++)) to Daphnia magna was studied under renewed static conditions. Under 25±℃ and 9—10 hour dialy lighting (3,000—3,300 lux), Daphnia magna, derived from a pure strain and aged 6±6 hours, were exposed to 1—28μg Hg/L. Experiment of each concentration was carried out by means of ten beakers, each containing 50ml of filtered water and a single Daphnia. Scenedesmus obliquus was provided for the animals throughout the experiments.The LC_(50) of mercuric chloride to D. magna was estimated to be 13.5±2.1μg/L for 48 hours. The chronic test showed that Daphnia died totally in 3.40±0.84 days when the mercuric concentration increased μp to 28μg/L, but there were no significant differences in the survival rates and growth rates in the media with concentrations ranging from 1 to 21μg Hg/L except for the totalnumber of offspring. In addition, the net reproductive rate (R_0) of the animals was found to decline gradually with increasing mercuric concentration.

在换水静置条件下(25℃),氯化高汞(以Hg~(++)计)对大型溞的48小时LC_(50)值及其可信限为13.5(±2.1)微克/升。试验个体饲以斜生栅藻单个培养,在汞含量为1—21微克/升浓度下,产仔总数经方差分析表明组间差异显著(F>F_(0.05))。各浓度组(X)与产仔总数(Y)的关系为:Y=-51.823X+4320.960(r=-0.904,p<0.01)。净增殖率(R_0)随浓度升高而逐渐下降。存活和生长用方差分析及D值检验表明对照组与各浓度组之间(差异数分别小于各自的D值20.89和0.1749),没有显著差异。各浓度组对内禀增长能力(r_m)和世代平均周期(T)影响不大。根据大型溞的生物学基本参数,其体长的生长模型为: l_t=4.57-3.5177e~(-0.00838t)

A constant-flow dilution apparatus for single or mixed pollutants has been developed. The variation coefficients of concentration ranged from 3.5% to 11.76% which were comparable with other similiar apparatus. Because of the simplicity of construction, reliability of opperation, no need of electricity and a wide variety of uses, the apparatus is applicable to toxicity testing, especially long-term sublethal or chronic testing with aquatic organisms.

本文提出一种用于水污染生物检测的恒流稀释装置,介绍装置的运转原理、结构及其评价。本装置的浓度变异系数在3.05—11.76%之间,与国外同类产品接近,由于结构简单,运转可靠,不需电力,本装置可广泛用于水生生物毒性试验,特别适于长期的亚致死和慢性毒性试验。

The purpose of this study was to investigate the effects of six mine floatation reagents on algae. The acute toxicities are in the order No.2Oil>Fu>0145>Yx>MPA>S-808.The 96-h EC_(50) for Scenedesmus obliquus of the above six reagents are 41.2, 50.1, 82, 177.8, 198.2 and 900 mg/1 respectively. No.2 Oil had the highest toxicity, while S-808 had the lowest toxicity. Some deformed cells were found in cultures exposed to 0145 for 48 hr, but in the cultures exposed to the other five reagents, no deformed cells were...

The purpose of this study was to investigate the effects of six mine floatation reagents on algae. The acute toxicities are in the order No.2Oil>Fu>0145>Yx>MPA>S-808.The 96-h EC_(50) for Scenedesmus obliquus of the above six reagents are 41.2, 50.1, 82, 177.8, 198.2 and 900 mg/1 respectively. No.2 Oil had the highest toxicity, while S-808 had the lowest toxicity. Some deformed cells were found in cultures exposed to 0145 for 48 hr, but in the cultures exposed to the other five reagents, no deformed cells were observed at concentrations higher than EC_(50). The toxicities of No.2 Oil, 0145 and MPA decreased markedly after they had been kept at ambient temperature for 10 days. Chronic tests indicate that the algae can remove S-808. The algae exposed to 100 ppm S-808 caused a 48% reducation in the optical density of the S-808 solution. The reagent 0145 can inhibit algal photosynthesis. The photosynthetic rate of algae exposed to 50, 100 and 200 ppm 0145 for 4 hr decreased by 15, 34 and 36% respectively.

本文评价了六种选矿药剂对藻类的毒性效应,它们对斜生栅藻的毒性大小排列顺序是:二号油>Fu>0145>Yx>MPA>S-808,96h-EC_(50)值分别为41.2,50.1,82.0,177.8,198.2和900ppm。六种选矿药剂对藻类毒性最大的是二号油,毒性最小的是S-808。对藻类细胞形态的观察结果表明,0145对藻类的细胞形态有轻度的致畸效应,在其它五种药剂的培养物中,均未发现畸变细胞。在室温下存放10d后MPA,0145和二号油,毒性明显下降,其下降速率的顺序是:MPA>0145>二号油。藻类对S-808具有净化脱色作用,100ppm浓度的S-808溶液经藻类作用32d后,其色度可减少48%,作用62d和93d,色度分别降低54%和58%。0145抑制藻类的光合放氧,经50,100和200ppm浓度的0145处理4h后,与对照相比,藻类的光合放氧速率分别下降15、34和36%。

 
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