查询词典 thin layer

It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

运用萃取、薄层层析、柱层析等方法对白三叶草地上部分的化感物质进行初步分离，结果表明，白三叶草经乙醇浸提旋转蒸发后用蒸馏水溶解，依次用石油醚、氯仿、乙酸乙酯、正丁醇萃取，生物测定表明氯仿组分对杂草的抑制作用最强，对苘麻芽长和根长抑制率分别为44.32%、88.08%，对稗草芽长和根长的抑制率分别为82.08%、92.16%，反枝苋的发芽率为0；其次是乙酸乙酯相。

Objective To improve and optimize the method of thin-layer chromatography for the alkaloid determination in radix aconite lateralis praeparata.

目的探讨附子生物碱薄层层析色谱条件的影响因素，完善附子生物碱TLC的检查方法。

Two main bioactive components were isolated by thin layer chromatography, which were all identified as actinomycin.

利用放线菌素类抗生素合成酶保守引物在该菌基因组中扩增到770 bp的相关基因片段。

A thin layer of dust had accumulated on my body, like a layer of talcum powder.

我醒来时觉得阳光耀眼，天蓝得吓人，身上落了一层细细的尘土，好像一层爽身粉。

Product fault ink UN-uniform UN-uniform ink products were:(1) water and ink, ink and wash painting the rubber roll version of wear, spindle bearing wear, cots epiderm aging decline, ink, etc;(2) series water roll of layer debranning, cylindricity wear, a thin layer of shoulderpieces for intergradle monlchamus, a product of long a portion of the Ribbon, resulting in a roller 跞 movement oscillating anisotropism;(3) support by Edition of water, rollers, the cylinder, swayig stand, wear, resulting in version tiaodong Cot by cause pressure by version is unstable, produce ink imbalance, ink, ink plate, staves, relying on the old version (students'overloaded) version of COTS and pressure;(4) the water roll chemiluminscent set of aging or poor quality water decline caused by transmission;(5) does not have a regular check of the drum-and-ink roller and version by version-and-ink roller and pressures;(6) if the drum gear wear, and gear spacing is the same as the regular ink "" gear.

二、产物墨色不平均障碍产物墨色不平均的来因有：（1）传水、传墨、匀墨和靠版水墨各橡胶辊的圆柱度磨损超不差，拆轴承的轴脚磨损，胶辊不内脏嫩化，传墨本领回升等；（2）串水辊度层脱皮，圆柱度磨损超不差，暗地有薄积墨层，两脚长出局部有积墨带，变不败滚子跞不静串墨不不平衡；（3）撑持靠版水、墨辊的锁脚，摆不静支架，磨损惨重，变不败胶辊靠版时跳不静致使靠版不抬辛不安定，爆发水墨不不平衡，呈现墨色不不平衡、干版、水墨杠、嫩版等本体；（4）水辊绒套嫩化或质度不差变不败传水本领回升；（5）操纵按期校核各水墨辊及版滚筒与靠版水墨辊的不抬辛；（6）若滚筒传不静齿轮磨损超不差，呈现与齿轮间距不异的有次序的&齿轮墨杠&。不一、套印障碍 1。

The liquating of crystal is useful to its shape and size and a thin layer of glass will bring about which is helpful to glaze gloss. Through cross experiment design, the reasonable range of oil-drop glaze chemical composition is studied and the limitation that single special clay is added to glaze batch is broken. It is proved that using ordinary ceramic raw materials to produce oil-drop glaze is feasible if the chemical composition of glaze is reasonable and the technology control is suitable. In addition, through the experiment it is found out that proper firing rule is the critical factor that affects the oil-drop glaze decorating effect. At the same time, other technological factors, for example, the thickness of glaze layer, glazing method, the size of glaze particle, which can affect the quality of glaze surface, must be considered.

晶体的适当熔解促使油滴形状圆整、尺寸大小适中，并在晶体表面形成一层玻璃相，有利于釉面光泽度的提高；通过正交试验方法探讨了油滴釉合理的化学组成范围，并突破了传统油滴釉制品及目前大多数仿制品采用单一特定天然釉土配料的局限，试验证明，只要化学组成合理，工艺控制适当，使用普通制瓷原料生产油滴釉制品是完全可行的；此外，本研究还发现，合理的烧成工艺控制是影响油滴釉装饰效果的关键性因素，同时还应注意釉层厚度、施釉方法、釉料研磨细度等其他工艺条件对釉面质量的影响。

A layer of strip steel was found abrasion-welded to the surface of the spalled fragment and a 0.06mm thin layer of untempered martensitic structure was observed on the surface of the roll just beneath the welded strip.

在剥落块的表面上粘结着带钢，在带钢下的轧辊表面上观察到一层厚度约0.06mm未经回火的马氏体组织，此层下面还有一个具有低硬度的回火马氏体区域，晶间显微裂纹就从此两区域之间发生，然后垂直地向里向外扩展。

Using analyses of the surface chemical species formed on palladium in both conditions of flowing oxygen and the ammonia oxidation reaction,it is confirmed that the surface of palladium,at temperatures above 800℃,is a multilayer structure with the bright palladium metal surface being overed by a thin layer of palladium metal vapour and then by a layer of palladium oxidevapour.

本文分析了在流动氧气氛和氨氧化反应过程中Pd的表面化学状态，表明在800℃以上温度Pd的表面应是1种多层结构：光亮的Pd金属表面复盖着一层薄的Pd金属蒸气，Pd蒸气上又复盖着一层PdO蒸气。

Autumn morning, you see, there is a thin layer of frost covered in the above, like wrap a layer of granulated sugar.

秋天的早晨，你去看，有薄薄的霜覆在上面，像裹了一层砂糖。

Through the transition from water thin-layer scattering to thick-layer scattering, scattering field and depolarizability of laser in water are tested, and simplified field strength formulas for forward and backward scatterings are derived.

然后从薄层散射过渡到厚层散射，检测了激光在水中的散射场和退偏振度，并对前向散射和后向散射导出了简化的场强计算公式。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。