ppb

ppb

1. The 50 ppb level represents a conservative estimate of the Limit of Detection (LOD) for the methods employed;

50浓度水平是一个保守的估计，检测限（LOD值）为采用的方法;

2. For ISSR marker, 34 polymorphic bands were generated, PPB were 53.0%.

ISSR引物共扩增到34条清晰的多态性条带，多态性条带比率为53.0%。

3. PPB (Per-Packet Billing)

PPB

4. The presence of inclusions and developed prior particle boundaries (PPB) damage mechanical properties and service life of HIP disk.

PPB（原始粉末颗粒边界）和夹杂物等缺陷对盘件的性能和使用寿命不利，必须予以消除。

5. For RAPD markers, 85 polymorphic bands were produced, percentage of polymorphic bands (PPB) were 69.4%.

RAPD引物共扩增到85条清晰的多态性条带，多态性条带比率为69.4%。

6. This value,measured as ozone ,was initially set at an hourly average concentration not to exceed 80 ppb more than once per year.

“毒理学试验表明，臭氧的浓度高于环境值可能对血液的生化活动产生危害，降低肺功能，增加一般呼吸系统的不适感。”

7. A total of 127 DNA bands were amplified, 103 of which were polymorphic and the percent of polymorphic bands (PPB) was 81.10%.

一共获得127条清晰条带,其中103条具有多态性,多态带百分率(PPB)达81.10%。

8. Concentrations of melamine in the kidneys of the hogs from Location B were below 50 ppb, and histological examination of the tissue did not show evidence of crystal formation.

三聚氰胺浓度在肾脏的猪从位置B的浓度低于50，并组织学检查的组织并没有证据表明晶体的形成。

9. The melamine concentrations measured in poultry tissue samples from six birds from two locations exposed to contaminated feed were all below the 50 ppb level.

三聚氰胺浓度测定家禽组织样本来自6个鸟类从两个地点暴露在污染的饲料均低于50浓度水平。

10. The melamine concentrations measured in meat from four of the hogs exposed to the highest percentage of contaminated pet food scraps (Location B) were below 50 ppb.

三聚氰胺浓度测定肉类四个猪接触到的百分比最高受污染宠物食品签名（位置b）项，低于50浓度。

11. Also in agreement with prior cycles, the methane concentration then declined by 100 ppb as summer sunshine subsequently waned.

与之前的循环波动一样，当接下来夏季阳光减弱时，甲烷浓度下降了100ppb。

12. For the purpose of this assessment it is assumed that all edible tissues contain 50 ppb melamine.

为了这次评估是假定所有可食组织中含有50浓度三聚氰胺。

13. For the purposes of this assessment, the concentration of melamine assumed in the tissue (50 ppb) is doubled to 100 ppb to account for cyanuric acid , which was not actually measured by the test.

为了这次评估，浓度三聚氰胺假设的组织（50十亿分之）是翻了一番，达到100浓度占氰尿酸，这是没有实际测量试验。

14. At the end of 3 min of PPB, the anti-G suit of had the best compensatory effect and lower-abdomen bladder come next to it.

从加压呼吸3mln末的代偿效果看:抗荷服的代偿效果最好;

15. Early in previous interglacial intervals, the methane concentration typically reached a peak of almost 700 parts per billion (ppb) as precession brought summer radiation to a maximum.

先前的间冰期早期，夏季辐射由于岁差而达到最大值时，通常甲烷浓度也到达高峰，约700ppb（ppb为十亿分之一）。

16. A total of 92 DNA bands were amplified, 61 of which were polymorphic and the percent of polymorphic bands (PPB) was 66.30%.

共获得92条清晰条带，其中61条具有多态性，多态条带比（PPB）66.3%。

17. One of the 6 samples from Day 9 had detectable levels of melamine (<500 ppb); all other of the 41 samples did not contain detectable levels of melamine.

其中6样本9日探测水平的三聚氰胺“（<500浓度）;所有其他的41个样品未检出含有三聚氰胺水平。

18. Of these bands, 114 were polymorphic, and the percentage of polymorphic bands (PPB) was 95.00%.

其中，多态性谱带114条，多态性带百分率(PPB)为95.00%。

19. fractional ppb

分数ppb

20. It is, thus, suggested that the content of Aflatoxin B_1 in mixed diet should be less than 20 ppb while the content of Aflatoxin M_1 in milk should be less than 0.5 ppb.

初步提出:混合饲料中AFB_1暂定为20ppb,鲜奶中AFM_1暂定为0.5ppb。

21. Using the standard gas confected by National Standard Research Center for CRM,the system can detect the concentration of volatile organic compounds and the ultra-low detection limit reaches 1 ppb.

利用国家标准物质中心配制的标气,系统可以有效检测挥发性有机化合物浓度,检测极低限达到了1 ppb。

22. To date, at least 157 houses in D.C. have lead levels at the tap higher than 300 parts per billion (ppb), and thousands more have exceeded the Environmental Protection Agency's limit of 15 ppb.

到目前为止，华府至少有157户住家的自来水铅含量高过300ppb（1ppb为10亿分之一），另有数千户的含铅量超过美国环保署规定的上限15ppb。

23. Concentration of cobalt in running water of Guangzhou as well as Zhongshan Uni-versity were 2.0 PPb,in Pearl River water was 3.8 PPb.

前两者含钴量均为2.0PPb,后者含钴量为3.8PPb。

24. parts per billion (ppb)

十亿分率

25. In original English language for the 1st impression.The Net Price to the Publisher is at the ratio 1.6 of the PPB cost.

原书第一次印刷的文字形式是英文。出版者支付的净价依据PPB成本1.6的比率计算。

26. previous particle boundary(PPB)

原始颗粒边界（PPB）

27. participatory plant breeding (PPB)

参与式植物育种

28. cyclopium. The positive rate of AFB_1,in feeds and raw materials is 2.8%,28% respectivily; thehighest amount is 220 ppb,1756.6ppb respectively.

在饲料和原料中,黄曲霉毒素 B_1(AFB_1)的检出率分别为2.8%、28%,最高含量分别为220ppb、1756.6ppb;

29. Study on flow-injection spectrophotometric determination of ppb level silicate in boiler water and feedwater in thermal power plant

基于流动注射分析技术快速测定电厂汽水中痕量硅酸盐的研究

30. Had the recent trend continued to mimic older interglacial intervals, it would have fallen to a value near 450 ppb during the current minimum in summer heating.

如果现在的趋势与过去间冰期的波动相同，目前夏季的甲烷浓度应该要降到450ppb。

31. Replicate analysis of two seawatet samples with Ag concentration of 0.05ppb and 0.10 ppb shows the relative standard deviation of 3.0% and 3.8% respectively.

对含银为0.05ppb和0.10ppb的两份天然海水样品进行六次平行测定,其相对标准偏差分别为3.0%和3.8%。

32. CrCL3, CrNano, Cr piconiate (CrPic) and Cr nicotinate (CrNic) were dissolved to different concentration as 100,200,400,800,1600 ppb in 0.9% NaCl solution.

将氯化铬、纳米铬、吡啶羧酸铬和烟酸铬分别配制成5个浓度梯度：100、200、400、800、1000ppb，调节溶液Ph值到8.5后，测定溶液中铬浓度。

33. SPECTROPHOTOMETRIC DETERMINATION OF PPB LEVEL OF COPPER IN WATER WITH 3,5-Br_2-PADAP IN THE PRESENCE OF TRITON X-100 AFTER SEPARATION AND PRECONCENTRATION OF COPPER USING SULFHYDRYL COTTON FIBER

巯基棉分离富集3,5-Br_2-PADAP分光光度法测定ppb级痕量铜

34. When the counting time of PMT is 10 seconds, the ratio between the concentration of NO (PPB) and the counting rate (CPS) is 1:5.

当计数门为10秒的时候，NO标气浓度(PPB)与计数率(CPS)的对应关系是：1：5；

35. All drill water to be pretreated with 2 ppb Gluteraldehyde.

所有的钻井水都要按每桶加两磅的戊二醛作预处理。

36. Add 25 ppb Bentonite and allow to hydrate for a minimum of 6 hrs.

按每桶钻井液加25磅的膨润土，允许水化至少6个小时。

37. PPB digital mapping

数字填图

38. Data are presented as concentrations in part per million (ppm), part per billion (ppb) or qualitatively as positive or negative, depending on results reported.

数据作为部分的浓度为每百万（百万分之一），每10亿部分（浓度）或定性为积极或消极的，取决于报告的结果。

39. Data are presented as concentrations in part per billion (ppb) or qualitatively as positive or negative, depending on results reported.

数据作为部分的浓度每10亿（浓度）或定性为积极或消极的，取决于报告的结果。

40. The content of this page is from the PPB port or PPB customs import and export company directory;

本页面内容主要是来自PPB港口或PPB海关的进出口公司目录；

41. The detection limit for surface waters is 0.05 ppb U .

检出下限为0.05ppb;

42. the corn mcalJ in use containied AFT B 235 ppb;

正在用的饲料玉米粉含 AFT B 235 ppb;

43. the residual AFT B in livet and kidney of the dcad racoons was 10 ppb and 2 ppb respectively.

死亡浣熊肝脏、肾脏残留的 AFT B_1分别为10 ppb 和2 ppb.

44. DETERMINATION OF ppb LEVEL Ag,Cd,Pb,Au,Bi AND Cu BY FLOTATION-FAAS

浮选-原子吸收法连续测定ppb级银、铅、镉、金、铋、铜

45. Instead the trend reversed direction 5,000 years ago and rose gradually back to almost 700 ppb just before the start of the industrial era.

然而，5000年前，趋势逆转，浓度不减反升，工业时代还没开始前便已几乎达到700ppb。

46. The method has been successfully used for determination of co balt at the ppb level in authentic samples .

用2mL 1mol/L的HClO_4溶液淋洗钴亚硝基R盐的络合物直接进行比色测定,可以测定ppb级的痕量钴,并成功地将该方法应用于试样分析。

47. Test Method for Analysis for Determining Residual Vinyl Chloride Monomer Content in PPB Range in Vinyl Chloride Homo- and Co-Polymers by Headspace Gas Chromatography

用液面气体色层分离法测定氯乙烯均聚物和共聚物中的十亿分之一级残余氯乙烯单体含量的分析方法

48. Objective To compare cardiovascular function of subjects exposed to positive pressure breathing (PPB) while wearing G suits with different bladder coverage.

目的探讨加压呼吸时抗荷裤的囊覆盖面积大小对心功能的影响。

49. Sulfinert coating provides stable storage of sulfur and mercury at ppb levels in petroleum samples.

硫钝化的涂层为采样罐提供了稳定的性能，可以储存PPB级的含硫样品。

50. Keywords PREP;black powder;previous particle boundary（PPB）;inter-particle rupture;

等离子旋转电极工艺;“黑粉”;原始颗粒边界（PPB）;颗粒间断裂;

51. Five primer groups were screened in 6 shiroes of T. giganteum. Among 202 DNA fragments amplified 151 were polymorphic, the percentage of polymorphic bands (PPB) was 74.75%.

筛选的5组引物在大白口蘑6个菌塘的56朵子实体中检测到202个位点,其中多态位点151个,多态位点百分比PPB为74.75%。

52. In short, the methane concentration rose when it should have fallen, and it ended up 250 ppb higher than the equivalent point in earlier cycles.

简言之，甲烷浓度在应该下降时反而上升了，而且比过去周期相对应的浓度高了250ppb。

53. As a result,the properties of PPB were improved through the filling of SiO_2,which was surface treated by HMDS(hexamethyldisilane). The addition of PE-g-MAH further improved the impact property of the composite.

结果表明,用六甲基二硅氮烷表面处理的SiO2填充PPB,使PPB各项性能均得到了提高,PE-g-MAH的加入又进一步提高复合材料的冲击性能。

54. The results show that the 48hLC50 values for embryos are 7,24,2520,1400,11330 ppb and the 96hLC50 values for Jarvae 13,66,3590,1720,14550 ppb,respectively.

结果表明:这五种重金属离子对胚胎的48小时LC_(50)值依次为7、24、2520、1400、11340ppb; 对幼体发育的96小时LC_(50)值分别为13、66、3590、1720、14550ppb。

55. Bromate is suspected of posing one of the highest cancer risks of any DBP. The MCL for bromate is only 10 ppb.

而作为一种替代品，臭氧消毒逐渐被大家所采用。但是虽然臭氧自身不会产生可恶的副产品，但是它却会参与副产品的形成，那就是溴酸盐。

56. FSIS Western laboratory repeated analysis and reported at the Level of Detection for the Western Laboratory of 50 ppb.

西方安全检验局实验室反复分析和报告水平的检测实验室西部50浓度。

57. The line is mainly used producing pipe material whose raw material is mainly PP-R resin.It also is suitable for producing pipe materials of PP,PPB,PPH resin.

该生产线主要用于生产以PP-R树脂为原料的管材生产,同时适用于以PP、PPB、PPH、树脂为原料的管材生产。

58. The line is mainly used producine pipe mate-rial whose raw material is mainly PP-Rresin..It also is suitable for producing pipe materials of PP,PPB,PPC,PE resin.

该生产线主要用于生产以PP-R树脂为原料的管材生产，同时也适用于以PP、PPB、PPC、PE树脂为原料的管材生产。

59. This supports the use of 50 ppb as the melamine concentration in the scenarios below.

这种支持使用50浓度的三聚氰胺集中在以下情景。

60. PPB is fairness to each kind of user, and ISPs can also use price lever to optimize the network traffic and configure network resources properly.

采用PPB计费，不仅能使不同用户享有公平性，服务提供商也可利用价格杠杆优化网络流量，合理配置网络资源。

61. The content of aflatoxin Bl in the contaminated fodder was rather high with an amount of 475 ppb.

饲料中黄曲霉素素B_1含量相当高,达475ppb。