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gamma dose
相关语句
  γ剂量
     CONTRIBUTIONS TO INDOOR GAMMA DOSE RATE FROM BUILDING MATERIALS
     建筑材料对室内γ剂量率的贡献
短句来源
  “gamma dose”译为未确定词的双语例句
     For the specified 200V VDMNOSFET,the threshold voltage shifts is only -0 5V at a Gamma dose of 1Mrad(Si) with +10V gate bias; the transconductance is degraded by 10% at a Gamma dose of 1Mrad(Si);
     对研制的 2 0 0 V VDMNOSFET,在栅偏压 +10 V,γ 总剂量为 1Mrad (Si)时 ,其阈值电压仅漂移了 - 0 .5 V,跨导下降了 10 % .
短句来源
     PORTABLE SCINTILLATION X OR GAMMA DOSE RATE METERS, TYPE SG 101, FOR MEASURING ENVIRONMENTAL RADIATION
     用于环境X,γ辐射测量的SG 101型可携式闪烁剂量率仪
短句来源
     PORTABLE SCINTILLATION X OR GAMMA DOSE RATE METERS,TYPE SG 101,FOR MEASURING ENVIRONMENTAL RADIATION
     用于环境X,γ辐射测量的SG101型可携式闪烁剂量率仪
短句来源
     The averaged gamma dose rate is 12.9×10~(-8)Gy/h,about 11.1%higher than the previous investigated results.
     kg-1; 空气γ吸收剂量率的平均值为12.9×10-8Gy/h,与既往福建省调查结果的偏差为11.1%。
短句来源
     The experimental results show that the transmitter is capable of resistant radiation and can work properly at gamma dose rate of 8x10~17/s.
     实验表明,激光二极管光发射机具有较强的抗辐照干扰能力,无扰动γ注量率为8x1017/s·cm2;
短句来源
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  相似匹配句对
     GAMMA ABSORBED DOSE OF PLANTS
     活体植株对γ射线的吸收剂量
短句来源
     EFFECTIVE DOSE EQUIVALENT FOR FXTERNAL X AND GAMMA RAYS
     X,γ射线外照射有效剂量当量
短句来源
     dose irradiation.
     含量比未经辐射的低,表明适宜剂量辐射可以提高幼苗耐热性。
短句来源
     IMPLEMENTATION OF GAMMA ON PVM
     基于PVM的GAMMA程序执行环境研究
短句来源
     On the Extension of Structured Gamma
     关于并行语言Gamma的结构化扩充
短句来源
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  gamma dose
During irradiation, five additional levels at Ec - 0.18 eV, Ec - 0.20 eV, Ec - 0.46 eV, Ev +0.17 eV, and Ev + 0.39 eV grow in linearly with gamma dose.
      
This was independent of the absorbed gamma dose in the studied detectors.
      
The effect of gamma dose on the bulk-etch rate measurements for some gamma-irradiated polymeric nuclear track detectors was extensively studied.
      
Angular distribution of gamma dose rate at deep penetrations
      
Calculation of absorbed gamma dose from a plane source with arbitrary angular and energy distributions
      
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Female mice of the LACA strain at the age of 11 weeks(about25—30g b.w.)were used in this experiment and exposed to tritiated waterand ~(60)Co γ-rays.Female mice were divided into five groups and wereintraperitoneally injected with 4.7,17,37,75 and 110μCi/(g b.w.)oftritiated water,respectively.The doses absorbed by the ovaries 10 daysafter injection were 3.9,14.1,30.7,62.2 and 91.2 rad,consequently.The gamma doses of animals were obtained by continuous exposure to~(60)Coγ-rays for 10 days with an...

Female mice of the LACA strain at the age of 11 weeks(about25—30g b.w.)were used in this experiment and exposed to tritiated waterand ~(60)Co γ-rays.Female mice were divided into five groups and wereintraperitoneally injected with 4.7,17,37,75 and 110μCi/(g b.w.)oftritiated water,respectively.The doses absorbed by the ovaries 10 daysafter injection were 3.9,14.1,30.7,62.2 and 91.2 rad,consequently.The gamma doses of animals were obtained by continuous exposure to~(60)Coγ-rays for 10 days with an exponential decrease.simulating the trendof tritium concentrations in ovary.The accumulative doses received during10 days were 52.6,77.18.108.22.161.87.194.25 and 269.88 radrespectively.Preliminary results showed that when the doses absorbed bythe ovaries after injection of tritiated water within 10 days were 3.89—62.2 tad and accumulative doses dilivered by γ-rays in 10 days were 55—119 tad,The primary oocyte survival reduced exponentially withaccumulative doses.Based on these findings,the RBE was preliminarilyestimated to be 3 at tritium beta rays doses of 15 tad.The RBE of tritiumbeta rays increases at low doses and dose rates.

选用11周龄,体重25—30克的 LACA 品系未经产雌性小鼠为实验动物。实验分为氚水内照射和~(60)Coγ射线外照射两部分。氚水是一次注入腹腔的,各照射组按每克体重计的注射量分别为4.7、17.0、37.0、75和110.0微居里,注射后10天内卵巢的累积剂量依次为3.9、141.、30、7、62.2和91.2拉德。~(60)Coγ射线外照射大致是模拟氚在卵巢内呈指数下降方式的剂量连续照射10天,每天照射22小时,10天内各照射组小鼠全身的累积剂量分别为52.6、77.18、108.22、161.87、194.25和269.88拉德。实验结果表明:当氚水内照射产生的卵巢累积剂量为3.9—62.2拉德、~(60)Coγ射线外照射产生的全身剂量为55—119拉德时,初级卵母细胞存活率呈指数下降。当卵巢的氚剂量为16拉德、初级卵母细胞存活率为20%时,氚的相对生物效应系数为2.28。

Virgin female wistar rats in 90—120 days old were mated with males of the same strain at night Pregnant animals were randomlydivided into various dose groups with 10—1.2 rats each group.For~3H-β-irradiation,five groups of rats were injected intraperitoneally with HTOof various activity to establish the desired HTO concentrations in bodywater on the zero day of gestation.From then on,animals would beprovided with tritiated drinking water to maintain relatively constant levelof tritium in body water to maintain...

Virgin female wistar rats in 90—120 days old were mated with males of the same strain at night Pregnant animals were randomlydivided into various dose groups with 10—1.2 rats each group.For~3H-β-irradiation,five groups of rats were injected intraperitoneally with HTOof various activity to establish the desired HTO concentrations in bodywater on the zero day of gestation.From then on,animals would beprovided with tritiated drinking water to maintain relatively constant levelof tritium in body water to maintain relatively constant level of tritium inbody water throughout the gestation.The intrauterine dose rates whichwere estimated from average concentration of body water tritium are 0,0.5,1.2,2.0,and 3.8 tad/d,respectively.In the case of gamma irradiation,pregnant animals were exposed with~(137)Cs source for 22 hours per day following gestation up to the 22ndday.The dose level was expressed in terms of tissue absorbed dose inrad.In this work,the dose rates were 0,1.0,2.0,4.0,6.0,8.0,and12.0 rad/d.I his experiment the gestational period was 22.00±0.46 days(M±S.D)for all 134 rats.At birth,the mean cerebral mass of eachlitter Was correlative closely with the length of gestational period.Thecerebral mass would be normalized to 22.00 day of gestation for everygroup with the fitted regression equations.As a result,it showed a linearrelationship between cerebral mass and radiation dose(M_β=160.2-2.33D_βand M_γ=161.6-1.73D_γ).The calculation indicated that the effect of tritiated water at dose rateof 1.0 rad/d(the total cumulative absorbed dose over 22 days was about22 tad)is equivalent to that with gamma radiation at dose rate of 2.14rad/d(the total a cumulative absorbed dose over 22 days was about 47 rad)and RBE=2.14,and that the effect of HTO at beta dose rate of 3.8 rad/d(the total dose is about 84 rad)is equivalent to that with gamma radiationat dose rate of 5.9 rad/d(the cumulative absorbed dose was about 130 rad)and RBE=1.55. The mean body weight was significant decrease in comparison to contralneoate at birth,when gamma dose rate was≥8.0 rad/d and the cumulateddose was about 176 tad over the gestational period.At lower dose level,however,no dose-dependence of the body weight development wasobserved.

本文报道了雌性大鼠全孕期接受氚水β射线或~(137)Csγ射线的照射后,自然分娩的仔鼠大脑重量和孕期长短以及辐射剂量的关系。实验用的氘水β剂量率为0、0.5、1.2、2.0和3.8rad~(-1)五种,~(137)Csγ射线的剂量率为0、1.0、2.0、4.0,6.0、8.0和12.0rad d~(-1)七种。共观察了134只孕鼠和1580只仔鼠。结果表明,妊娠22.0天的仔鼠平均大脑重量,随辐射剂量的增加而呈线性减少。和~(137)Csγ射线比较,氚水β射线的相对生物效应系数为1.55—2.14。

This paper summarises the typical values of radioactive concentrations ofnatural radionuclides in some major building materials, discusses the mathods ofcalculating gamma dose indoors and annual increments of gamma dose indoors. Ifthe increments in whole body dose equivalent were set to 1 and 15 mSv/a, thecriteria of radioactivity in building materials for controlling indoor gammaexposure are proposed.

本文简要综述了各类主要建筑材料中的放射性水平,讨论了室内γ辐射剂量的计算方法和人在室内受到的附加剂量的计算方法。还讨论了在年全身附加剂量为1和1.5 mSv时建筑材料放射性的控制标准。

 
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