热门问答
- 做肠镜前二甲硅油散和聚乙二醇电解质散怎么用
2016-08-22 09:11:24
627
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- 做肠镜前,聚乙二醇电解质散用法
- 聚乙二醇电解质散用法,医生开了两盒,说明书上说泡1000ml,diyi次喝1000ml之后每隔十五分钟服用一次次250m,那我是diyi杯喝完,然后拿第二包泡,泡完每次喝250ml么,我准备周六早上做肠镜,那什么时候喝
2015-01-13 09:35:41
1158
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- 清肠需要喝多少聚乙二醇电解质散
2015-10-30 11:40:54
491
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- 电解质散是什么意思
2016-10-28 08:31:46
625
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- 散粒噪声的散粒噪声
2018-12-05 06:30:16
205
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- 检查肠做肠镜好还是CT好?
- 做B超发发现有一硬块,医生建议做进一步检查,肠镜还是CT好?
2007-04-20 02:29:08
437
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- 激光散射法原理是什么?
2017-11-25 00:10:02
365
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- 散分了,英语翻译高手快来
- 1.INTRODUCTION The aim of this validation study has been to demonstrate that the method AD-TM-R165335-F051-POW-LD-000959-v2 is suitable for determination of the particle size distribution of R165335 – F051 by means of laser diffraction. T... 1.INTRODUCTION The aim of this validation study has been to demonstrate that the method AD-TM-R165335-F051-POW-LD-000959-v2 is suitable for determination of the particle size distribution of R165335 – F051 by means of laser diffraction. The following compounds have been used in the validation. 2. METHOD VALIDATION 2.1. Precision 2.1.1. Analysis Repeatability – test results and acceptance criteria Analysis repeatability expresses the precision of the analytical method under the same operating conditions over a short interval of time. The repeatability of the method has been determined by the 6-fold analysis of 1 sample of the drug product batch by 1 analyst on 1 day, using 1 instrument. Based on the volume distribution, for each analysis the dV10, dV50 and dV90 cumulative undersizes are reported. In addition, for each series of particle size data the averages, standard deviations, relative standard deviations (RSD), and 95% confidence intervals are reported. For evaluation purposes, the RSD values are compared with the acceptance criteria. 2.1.2. Intermediate Precision – test results and acceptance criteria Intermediate precision expresses the within laboratory variations, e.g.different days, different analysts, etc. For this purpose, the intermediate precision of the method has been determined by 2 analysts, each analysing the product in 6-fold. The analyses have been done using 1 instrument,whereas analyst 1 performed a 6-fold analysis on day 1, and analyst 2 performed a 6-fold analysis on day 2. The validation data as obtained for the analysis repeatability testing will be used as the analyst 1 data set. Based on the volume distribution, for each analysis the dV10, dV50 and dV90 cumulative undersizes are reported. In addition, for each series of particle size data the averages, standard deviations, relative standard deviations (RSD), and 95% confidence intervals are reported. For evaluation purposes,the RSD values are compared with the acceptance criteria. Participating Analysts: • Analyst 1: Global Analytical Development, Method Development, Beers (Belgium) • Analyst 2: Global Analytical Development, Stability Evaluation and Release, Beers (Belgium) 2.1.3. Conclusions The particle size method AD-TM-R165335-F051-POW-LD-000959-v2 has been demonstrated to show an adequate analysis repeatability and intermediate precision. 2.2. Robustness The robustness of the analytical method has been tested during the method development and is a measure of its capacity to remain unaffected by small but deliberate variations in method parameters. The capability of method AD-TM-R165335-F051-LD-000959-v2 to remain unaffected has been tested by varying the following parameter: 1. Slid Width (and thereby the mass flow of the product in the instrument) 2.2.1. Conclusions The robustness of the method has been demonstrated by showing the validity of the method after small deliberate changes to the slid width. 展开
2008-02-02 02:56:24
471
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- 包装袋内有气泡和散气的原因
- 我公司主要生产山椒凤爪,产品放一段时间就会产生气泡或者是散气,特别是夏天,有高人知道原因的,请指教!
2010-03-20 02:11:36
317
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- 自然现象关于雾起雾散
- 谁能以朝霞晚霞 月圆月缺 春风春雨 雾起雾散的自然现象 随便一个拿来写文章? 要五年级的水平
2009-02-22 18:13:38
766
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- CPU是用散热胶好还是导热胶好
- 我的CPU是酷睿I5的 当时是朋友帮组装的上的导热硅胶 不知道是不是对我的电脑有影响 听人家修电脑的说应该是散热硅胶
2017-09-09 08:11:22
393
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- 用足光散一次没有观察反应
2016-07-29 01:49:12
293
1
- 怎样ps照片加一侧散粉
2018-01-01 05:05:14
410
1
- x荧光光谱仪详细分类(波散)
2012-07-18 02:24:30
461
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- 可见散在淋巴细胞反应 是什么意思
2016-11-28 15:15:43
380
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- 塑料门散架了该用什么胶水粘住
2017-02-27 18:15:38
530
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- 病理报告:见散在破碎淋巴细胞什么意思
2018-11-23 10:35:15
443
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- 像散对扫描电镜成像质量的影响
除了加速电压、样品的导电性、电镜的束流强度,像散、图像的亮度对比度等都会影响扫描电镜图像的成像质量。
今天,这一篇文章将教大家了解消除像散的重要性,提高样品的成像质量。
像散的定义可能会比较抽像,所以,小编用近视的散光来进行对比:
当近视看月亮时,月亮会比较模糊,但仍是一个圆形。
当近视有散光看月亮时,看到的月亮会出现变形。
电镜的像散就如同散光,当图像有像散时,在聚焦的过程中会发现图像拉伸变形,失去原本的形状,这也是判断像散的依据。如果在聚焦的过程中,没有发现图像出现拉伸变形,仅仅只是图像虚化,那便说明没有像散。
像散是影响图像清晰度的重要因素。尤其是高倍图片——在用高加速电压、低束流拍摄高倍率图片时,一般都需要进行消像散。下面,通过几组图片,让大家更好的理解消像散对高倍率图像的重要性。
锡球,放大倍数是 79000 倍,左边图像无像散,右边图像有像散
电极材料,放大倍数 50000 倍,左边图像无像散,右边图片有像散
炭材料,放大倍数 20000 倍,左边图像无像散,右边图片有像散
当扫描电镜图像出现像散时,对其进行聚焦,图像会出现拉伸感,如下图所示,消像散需要实验员具有丰富的操作经验,才能准确识别并消除象散。
飞纳电镜 Rel 4.6 的自动消像散功能可以轻松解决扫描电镜初级操作者无法熟练消像散的问题。
2020-09-07 13:25:53
685
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