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negative results     
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  阴性
     Six cases of malignant tumor had positive imaging results, and the T/N ratio at hour 2 was 1.95-5.64 and that at hour 4 was 2.05-6.88. Two cases with benign lesion had negative results.
     6例恶性病变的显像结果为阳性,2h T/N比值1.95~5.64,4h T/N比值2.05~6.88,2例良性病变的显像结果为阴性;
短句来源
     20 patients′ urinary transferrin was higher in 51 patients with urinary albumen negative, results of urinaty transferrin median were 108.2,213.6,90.3,62.6mg/mol Cr on day1,day3,day5,day7 respectively after poisoning,higher than that of normal control (51.2mg/mol Cr),difference was more significant (P< 0.05 ),the more poisoning ,the higher of urinary transferrin.
     51例尿蛋白阴性中毒患者尿转铁蛋白增高20例,在中毒后第1、3、5、7天尿转铁蛋白中位数分别为108.2mg/molCr及213.6mg/mol Cr、90.3mg/mol Cr及62.6mg/mol Cr,均高于正常对照51.2mg/mol Cr,差异有显著性(P<0.05),且中毒愈重,尿转铁蛋白增高愈明显。
短句来源
     The clinical results showed that 11 C-choline detected 7/7 malignant lesions in 4 patients,and 18 F-FDG detected 3/7. 18 F-FDG gave false negative results to 4 of the 4 brain lesions.
     4例肿瘤患者11C 胆碱检出 7/7个病灶 ; 18F FDG检出 3/7个 ,脑部 4个病灶18F FDG为假阴性
短句来源
     For sera with 10 6~10 9copy HBV/ml,the false negative rate of routine PCR was only 5.0%,while for sera with 10 5~10 4copy HBV/ml,the false negative rate reached 36.8%. In 25 cases with sera HBV equal or less than 10 3 copy/ml,routine PCR showed negative results in most cases except 6 cases (24%) with positive or weak positive results.
     常规PCR检测 10 6~10 9copy/ml的血清假阴性率仅 5 .0 %,10 4 ~ 10 5copy/ml时假阴性率达 36 .8%,10 3 copy/ml主要为阴性结果 ,但有 6例为阳性或弱阳性 ( 2 4.0 %)。
短句来源
     ②The sensitivity of3D-CTA for intracranial aneurysms was90.9%,the radio of false positive and false negative results were4%and5.1%respectively;
     ②脑动脉瘤3D-CTA确诊率90.9%,假阳性4%; 假阴性5.1%;
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  阴性结果
     For sera with 10 6~10 9copy HBV/ml,the false negative rate of routine PCR was only 5.0%,while for sera with 10 5~10 4copy HBV/ml,the false negative rate reached 36.8%. In 25 cases with sera HBV equal or less than 10 3 copy/ml,routine PCR showed negative results in most cases except 6 cases (24%) with positive or weak positive results.
     常规PCR检测 10 6~10 9copy/ml的血清假阴性率仅 5 .0 %,10 4 ~ 10 5copy/ml时假阴性率达 36 .8%,10 3 copy/ml主要为阴性结果 ,但有 6例为阳性或弱阳性 ( 2 4.0 %)。
短句来源
     The study of false positive/negative results and common trouble of Bactec 9120
     Bactec9120全自动血培养仪的假阳/阴性结果及常见故障的研究
短句来源
     In NIH 3T 3 cell micronucleus test,MTBE showed negative results.
     在NIH3T3细胞微核试验中,MTBE呈现阴性结果
短句来源
     For sera with weak positive results by routine PCR, FQ-PCR can also show false negative results.
     弱阳性标本FQ PCR检测也可能出现假阴性结果
短句来源
     Trials of subchronic toxicity(90 days) revealed that oral toxicity was 19.1 mg/kg for female,and 18.3 mg/kg for male,with negative results on Ames test,micro-nucleus test,and chromosome-type aberration test.
     亚慢性经口毒性(90 d)试验雌为19.1mg/kg,雄为18.3mg/kg; Ames、细胞微核和染色体畸变试验均为阴性结果
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  阴性率
     For sera with 10 6~10 9copy HBV/ml,the false negative rate of routine PCR was only 5.0%,while for sera with 10 5~10 4copy HBV/ml,the false negative rate reached 36.8%. In 25 cases with sera HBV equal or less than 10 3 copy/ml,routine PCR showed negative results in most cases except 6 cases (24%) with positive or weak positive results.
     常规PCR检测 10 6~10 9copy/ml的血清假阴性率仅 5 .0 %,10 4 ~ 10 5copy/ml时假阴性率达 36 .8%,10 3 copy/ml主要为阴性结果 ,但有 6例为阳性或弱阳性 ( 2 4.0 %)。
短句来源
     False negative results were reached in 2 cases, False negative rate was 7.4%.
     假阴性 2例 ,假阴性率 7 4% ( 2 /2 7)。
短句来源
     In addition three cases were negative results of PET/CT, of them one case was carcinoma in situ by pathologic examination, therefore the false negative rate of PET/CT was 33.3%.
     3例PET/CT阴性患者中,有1例病理证实为宫颈原位癌,PET/CT的假阴性率为33%。
短句来源
     There were 4 explorations with negative results (4.21% ) .
     胆管探查阴性率4.21%(4/95);
短句来源
     Results The false positive and false negative rates were 0.68% and 0.70%. Epiphyte was the main cause of the false negative results (62.07%), and the others were nofermenters (10.34%), Viridans streptococci (10.34%), coagulase negative Staphylococci (6.90%), Gram positive Corynebacterium (6.90%) and anaerobic bacteria (3.45%).
     结果 miniVITAL系统假阳性率和假阴性率分别为 0 .6 8%和 0 .70 % ,所有致假阴性菌种中 ,以真菌的比率最高 ,占 6 2 .0 7% ,其次为非发酵菌、草绿色链球菌、凝固酶阴性葡萄球菌、革兰阳性杆菌和厌氧菌 ,分别为 10 .34%、10 .34%、6 .90 %、6 .90 %和 3.4 5 %。
短句来源
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  负面效果
     This paper presents the trend towards large-scale development of petrochemical industry,the effects of expanding unit scale on saving investment, lowering product cost, comprehensive utilization, reducing pollution and its possible negative results as well.
     论述了石油化学工业大型化发展的趋势,阐述了增大装置规模对节省投资、降低产品成本、综合利用、减少污染等所起的作用以及可能带来的负面效果
短句来源
     From the layer of teachers, parents, students and music education, the paper will analyze the reasons and negative results brought by "elitism" education and propose some suggestions to change the current situation of music education.
     本文从音乐教育的角度,从教师、家长和学生这三个层面分析了“精英化”产生的原因及带来的负面效果,并提出了改变音乐教育现状的建议。
短句来源
     Defining the concept of Public order and Good custom scientifically can effectively prevent serious negative results that its uncertainty brings.
     科学地界定公序良俗的概念,可以有效地防止其不确定性所带来的严重的负面效果
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      negative results
    These procedures eliminate false positive and negative results in determining complex samples containing trace organophosphorus compounds.
          
    The estimates are based on the false (or true) rates of positive and negative results.
          
    Negative Results in Form-Preserving Approximation of Higher Order
          
    The model system can be used to evaluate the sensitivity of a chemical cleavage method and to control false-positive and false-negative results when different protocols are applied to the detection of DNA point mutations.
          
    However, these reforms have brought not only positive but also negative results.
          
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    o-Nitrophenol,p-nitrophenol,4-nitro-2-methyl-phenol,2,6-dichloro-4-nitro-phenol,p-nitrosophenol,4-nitroso-2-methyl-phenol,α-nitroso-β-naphthol,p-hydroxy-azobenzenesulfonic acid and Orange Ⅱ were reduced satisfactorily to the corre-sponding aminophenolic compounds by glucose or invert sugar in alkaline solu-tion.m-Nitrophenol and 2,4-dinitrophenol gave negative results.Due to high yield and easy manipulation,this method may be used withadvantage in the laboratory preparation of aminophenolic compounds.

    (一)葡萄糖或转化糖在碱性溶液中能把硝基酚类、亚硝基酚类及对磺酸苯偶氮酚类化合物还原成为相应的氨基酚类化合物。得到正面结果的有:阾硝基苯酚、对硝基苯酚、4-硝基2-甲基苯酚、2,6-二氯-4-硝基苯酚、对亚硝基苯酚、4-亚硝基-2-甲基苯酚、α-亚硝基-β-萘酚、对磺酸苯偶氮苯酚、橙Ⅱ等九种化合物。结果可称满意。(二)间硝基苯酚与2,4-二硝基苯酚在上述条件下,得不到相应的氨基酚类化合物。

    The first step in caprolactam polymerization is an addition polymerization. The authors have studied the initiative influence of various substances on the polymerization and obtained the following results. The initiators of the free radical type, such as benzoyl peroxide and hydrogen peroxide together with their redox systems, all exerted no effect on caprolactam. While carboxylic acids gave only weak initiative effect in absence of water and amines gave no action, the mixtures of acids and amines and of acids...

    The first step in caprolactam polymerization is an addition polymerization. The authors have studied the initiative influence of various substances on the polymerization and obtained the following results. The initiators of the free radical type, such as benzoyl peroxide and hydrogen peroxide together with their redox systems, all exerted no effect on caprolactam. While carboxylic acids gave only weak initiative effect in absence of water and amines gave no action, the mixtures of acids and amines and of acids and water initiated the polymerization rapidly. Amino-acids of various types also gave rapid initiation. 6-Benzoyl-amino-caproic acid was found to be far inferior in the initiative activity than benzoic acid. Trimethylphenyl ammonium iodide did not initiate the polymerization, and attempt to polymerize N-methyl caprolactam gave negative results.From these facts, the polymerization of caprolactam is clearly neither of free radical nor of step-wise addition mechanism. The authors suggest that the initiation is exerted by both the cation and anion of the initiator. These ions activate the amide grouping by a proton transfer mechanism, which causes caprolactam to polarize in the type of a zwitter-ion and thereafter polymerization proceeds.

    己內醯胺聚合的最初階段為加成聚合。作者研究若干種化合物,試驗它們對己內醯胺聚合的引發作用。結果,自由基型的引發劑如過氧化苯甲醯,過氧化氫和它們的氧化還原體系,均不能引發己內醯胺的聚合。羧酸在無水存在時其引發作用甚弱。胺類則缺乏引發效應。但羧酸与胺同時存在時能迅速的引起己內醯胺的聚合。氨基酸不論何種類型均有迅速的引發作用。苯甲醯胺基己酸的引發作用遠較苯甲酸為差。碘化三甲基苯基銨(季銨鹽)不能引發己內醯胺的聚合,而N-甲基己內醯胺也不能用這些引發劑引起聚合。根據以上結果,己內醯胺聚合顯非自由基型的聚合,亦非引發劑与單體的逐步加成。作者建議引發劑的正負兩種離子都有影響。引發機構是由於氫原子的轉移,使己內醯胺發生雙離子式的極化,因而發生聚合。

    In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf...

    In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf sheath and spike,particularly the bristle,while that onthe "green-stem" varieties was the yellowing of the leaf blade.In all instances,thediscoloration was usually accompanied by shortening of internode,stunting of thewhole plant.wrinkling of leaf surface,slight waviness of leaf margin,deformationof spike and underdevelopment of root systems.Plants infected at an early stagewere severely stunted and on heads were produced. It has been demonstrated that the red-leaf disease of the foxtail millet was causedby a virus readily transmitted by at least three different species of grain-infestingaphids:corn aphid,Rhopalostiphum maidis Fitch;grain aphid,Macrosiphum granari-um Kirby;and green-bug,Toxoptera graminum Rond.Tests with non-viruliferouscorn aphid eliminated the possibility of direct aphid injury as the cause of the disease. ??The virus was not transmissible by mechanical inoculation,by seeds nor through thesoil. Studies on the mode of transmission of red-leaf virus by corn aphid indicatedthat the virus was persistent in its insect vector and could infect in succession aseries of at least 27 tested millet seedlings.The aphid was unable to acquire thevirus in a 5-minute feedling period on the virus source but was able to pick up thevirus in 10-minute period.The 8-hour acquisition feeding period was optimum forthis aphid.The testing feeding period was found to be not more than 5 minutesand a 4-hour period of confinement on the diseased plant was ample for the aphidto cause maximum infection.Attempts to transmit the virus with cotton aphid.Aphisgossypii Gloner peach aphid,Aphis persicae Sehult and soybean aphid,Aphis glycinesMats,have given negative results.The incubation period for symptoms of the red-leaf virus in foxtail millet ranged from 10 to 32 days with the model period beingbetween 14 to 20 days. Under natural conditions,certain cultivated cereals and grass weeds showed thesymptoms resembling the red-leaf disease of foxtail millet.Among them,were ZeaMays L.,Panicum miliaceum L.,Setaria lutescens (Weigel) Hubb.,S.viridis (L.)Beauv.,Digitaria sanguinalis (L.) Scop.Echinochloa crusgalli (L.) Roem.,Eragrostiscilianensis (All.) Link,E.pilosa (L.) Beauv.,Arundinella anomala Steud,Spodiopogonsibiricus (Steud.) Trin.,Bothruochloa ischaemum (L.) Keng.,Capillipedium parviflor-um (R.Br.) Stapf and Poa practensis L..Artificial inoculation with the corn aphidproved that the first six named plant species,including the two cereals,were susce-ptible to the red-leaf virus and they produced,in all cases,the typical symptoms.Tests with the rest sexen grass weeds are in progress. The results of disease control experiments by timely spraying with an insecticide,E605,under field conditions were inconsistent.Among the 349 foxtail millet varie-ties of foxtail millet examined in the experimental field,nine of them were foundto be highly torelant to and suffered only very slightly from the attack of the red-leaf virus.These varieties were,however,succeptible in aphid transmission experiments. Available evidences point to the conclusion that the red-leaf virus of the foxtail millet herin reported is quite different from all the previously described cereal viruses.Among the cereal virus that closely resembles the red-leaf virus is the yellow-dwarfvirus reported by Oswald tnd Hauston.These two viruses are similar in the follow-ing respects:both are transmissible by the same species of aphids (Rhopalosiphummaidis,Microsiphum graminium andToxoptera granarium) and neither virus can betransferred mechanically.But they differ strikingly from each other in their hostranges.According to Oswald and Hauston,there were 19 of 55 grasses tested thatappeared to be immune from the yellow-dwarf virus.Digitaria sanguinalis,Echino-chloa crus-galli Setaria viridis and Zea Mays were among the immune hosts.On thecontary,all these four gramineous plants were found to be extremely susceptible tothe red-leaf virus both under natural condition and in artificial inoculation experi-ments.Accordingly,the red-leaf,a persistent aphid borne virus affecting the foxtailmillet,is herein reported as a new virus of the cereals.

    小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油...

    小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油芒均感染小米紅叶病病毒。其它紅化杂草和接种試驗,正在进行中。紅叶病病毒对小米植株所产生的影响,因植株發育的阶段不同而輕重有所差异,植株感病愈早病害愈剧烈。用杀虫剂E605在田間噴射小米防治紅叶病,未能表現药剂有防病的效能,在田間观察349个品种,选得9个高度耐病和农艺性状优良的品种。抗病选种可能是当前防治小米紅叶病最有效的防治措施。根据病原的傳染方法,寄主范围和所表現的症状,小米紅叶病病毒和以往所报道的禾本科植物的病毒病害的病毒均不相同,因此它是禾谷类作物的一个新的病毒。

     
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