If you are measuring high refractive indexes , you may also need to calibrate and adjust using traceable refractive standards 1 to 2 times a year 如测量高的折光指数，则每年需要1 2次使用可追踪的折光标准进行校准和检定。
Petroleum products and lubricants . determination of polycyclic aromatics in unused lubricating base oils . dimethyl sulphoxide extraction refractive index method 石油产品和润滑剂.未用的润滑基油的多环芳香剂的测定.二甲基亚砜萃取折光指数法
On the base of experiments , this paper found the primary factor of caused atmospheric - vertical refraction . a formula to calculate the angle of atmospheric - vertical refraction is given 以实验为基础，找出了导致大气竖直折光的主要因素，给出了大气竖直折射角计算的实用公式。
Italian astronomer and mathematician ; demonstrated that different weights descend at the same rate ; perfected the refracting telescope that enabled him to make many discoveries ( 1564 - 1642 ) 意大利天文学家、数学家（ 1564 1642 ） ；论证了不等重的物体下降速度相同；完善了折光式望远镜使他能够获得许多新的发现。
The phase diagram of completely mutually soluble double - fluid system needs not only many sets of data , but also map work curve of refract rate - composition , data processing and mapping larger workload 摘要由于完全互溶双液系平衡相图的绘制需要许多组数据，而且要绘制折光率组成工作曲线，数据处理和绘图工作量较大。
Some reflective bright lines just like the edges of the polygon can be seen in the surface of starch grains while prisms of calcium oxalate can be seen in the parenchyma tissue , which have n ' t been reported before 显微特征上，发现单粒和复粒淀粉粒表面有时可见类似多边形边缘的折光率较强的亮线，薄壁组织中可见草酸钙方晶，以往文献中未见记载。
Result within 10 minutes , the cells " shape begins to change ; cytoplasm in the flat rmscs retracted towards the nucleus , forming a contracted multipolar cell body , and leaving membranous process - like extensions peripherally 对照组为未经处理的细胞和用pbs代替一抗的细胞。实验结果刚分离的mscs贴壁后呈圆形，胞体透亮，折光性好，与造血细胞混杂。
This paper gives a model of trigonometric leveling of atmospheric refraction and vertical deflection , then analyses every part of its accuracy and give a lists to analyses all kinds of effects caused by the errors of triangle leveling 摘要首先建立了大气折光和垂线偏差的三角高程测量模型，并对模型的精度进行了逐项分析，列表分析了各种误差对三角高程测量的影响。
Plastic printing concaving type , wine carton box , poly plastic colour bag , vacuum aluminum bag etc . ; professional packing for wine , cigarette , tea , gold card , silver card , welcome friends from every circle for business cooperation and create splendid future 专业人员制作的酒类烟类茶叶等，金卡银卡磨砂冰花水晶皱纹七彩发泡折光塑印圆桶等酒类高档包装。
The density , viscosity , refractive index , molecular weight and sulfur amount of the fractions are on the increase with the increasing cumulative yield , while their molecular weight exhibits a narrow distribution from 300 to 400 研究表明，随累积萃取收率的增加，大庆和辽河油浆窄馏分的密度、粘度、折光率、硫含量及芳碳率呈增大趋势，油浆窄馏分的相对分子质量分布较窄( 300 ~ 400 ) 。
