结晶性

The crystallinity of cyanate ester resin was studied.

对氰酸酯树脂结晶性进行了研究。

A poisonous , crystalline alkaloid derived from certain nightshade plants, especially Egyptian henbane.

阿托品：有毒的结晶性生物碱，从茄类植物，特别是埃及天仙子提炼而得。

A poisonous, crystalline alkaloid derive d from certain nightshade plants, especially Egyptian henbane.

阿托品：有毒的结晶性生物碱，从茄类植物，特别是埃及天仙子提炼而得。

Polyoxymethylene is an important plastic with pretty good properties.

聚甲醛是一种高结晶性工程塑料，存在缺口敏感，冲击强度低、热稳定性差等缺点。

Being a kind of linear polymer with high crystallinity, polyoxymethylene is one of the best engineering plastics which crystallization behavior affects its other properties greatly.

聚甲醛是一种分子链中含有(CH2-O-)链节，没有侧链的高结晶性线性聚合物，综合性能优越的工程塑料，但缺口冲击强度较低，在某些方面不能满足工业化生产的需要。

It is probably useful to modify engineering plastics with the addition of polytetrafluoroethylene, which is a crystal polymer with lower friction coefficient, to improve composites friction and wear performance.

添加自身摩擦系数较低的结晶性高分子材料聚四氟乙烯是一种比较有效的改善工程塑料摩擦磨损性能的方法。

Leaching of Scandium From Scandium Concentrate by HCl and 7~# reagent

其盐酸盐为白色结晶性粉末，熔点223～226℃。

Rifampicin is bright red or dark red crystalline powder, scentless and odourless combined with other anti tuberculosis drugs, in the mean time rifampicin is also a refill of drugs which is drug-resistant to isoniazid or streptomycin.

本品为鲜红色或暗红色结晶性粉末，无臭，无味。利福平为高效广谱抗生素，主要与其他抗结核药合用，用于各种核病重病患者，也可作为对异烟肼和链霉素耐药菌株的替换物。

Character: White or almost white crystalline powder, smell-less;Assay:≥98.5%;Solubility:Soluble in water, Slightly soluble in acetone and ethanol;IR:Complies with the working standard;Chemical identification:Red;Na Salt indentification:Complies with the standard;Relative substance:Complies with the working standard;pH:8.0-9.5;Loss on drying:≤0.5%; Heavy metal:≤ 20ppm

特征及特性：应为白色或类白色结晶性粉末；无臭，无味；含奥扎格雷钠(C13H11N2NaO2)≥98.5%；在水中溶解，在乙醇和丙酮中微溶；IR图谱与对照品一致；化学鉴别应显红色；溶液主斑点与对照品溶液主斑点的位置相同；钠盐鉴别符合规定；有关物质鉴别符合规定；pH：8.0～9.5；；干燥失重≤0.5%；重金属≤20ppm

Character: Yellowish or yellow crystalline powder,smell-less; Assay: 98.0%—102.0%; Specific Optical Rotation:+63.0°to +69.0°; Ph:3.0 to 5.0;Clarity of Solution complies with the standard. Related Substance:(Single impurities≤0.5%; total impurities≤1.5%);Methanol:≤0.3%;Dichlormethane≤0.06%Acetone≤0.5%;walter:7.0%—9.5%; Residue on Ignintion:≤0.1%; Heavy Metals:≤0.0002% Identification:Most absorb at the wavelength 220nm,256nm,370nm; The infrared spectrogram according to the comparison; positive reflection

特征及特性：淡黄色或黄色结晶性粉末，无臭；含量98.0%—102.0%；鉴别：1）在220nm、256nm、370nm的波长处有最大吸收；2）供试品溶液在主峰的保留时间与对照品溶液主峰的保留时间一致；3）供试品红外光吸收图谱与对照品的图谱一致；4）呈正反映；比旋度：+63.0°至+69.0°；酸度：3.0—5.0；溶液颜色符合规定；有关物质：（单个杂质≤0.5%；总杂质≤1.5%）甲醇：≤0.3%；二氯甲烷：≤0.06%；丙酮：≤0.5%；水分：7.0%—9.5%；炽灼残渣：≤0.1%；重金属：≤0.0002

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。