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.

運(yùn)用萃取、薄層層析jk黄色网站、柱層析等方法對(duì)白三葉草地上部分的化感物質(zhì)進(jìn)行初步分離欧美在线伊人，結(jié)果表明，白三葉草經(jīng)乙醇浸提旋轉(zhuǎn)蒸發(fā)后用蒸餾水溶解伊人黄片啪啪啪，依次用石油醚亚洲图片家庭乱伦、氯仿、乙酸乙酯xxxx性16xx、正丁醇萃取啊灬啊灬高潮来了视频在线观看，生物測(cè)定表明氯仿組分對(duì)雜草的抑制作用最強(qiáng)，對(duì)苘麻芽長(zhǎng)和根長(zhǎng)抑制率分別為44.32%内地自拍日韩精品视频在线、88.08%爱看AV网站，對(duì)稗草芽長(zhǎng)和根長(zhǎng)的抑制率分別為82.08%、92.16%久久无码免费视频，反枝莧的發(fā)芽率為0插插爽视频；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.

目的探討附子生物堿薄層層析色譜條件的影響因素jjzz播视频，完善附子生物堿TLC的檢查方法国产偷自区。

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

利用放線菌素類抗生素合成酶保守引物在該菌基因組中擴(kuò)增到770 bp的相關(guān)基因片段。

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

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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 躒 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.

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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.

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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.

在剝落塊的表面上粘結(jié)著帶鋼，在帶鋼下的軋輥表面上觀察到一層厚度約0.06mm未經(jīng)回火的馬氏體組織67色国产欧美，此層下面還有一個(gè)具有低硬度的回火馬氏體區(qū)域国产一级A片嘿咻嘿咻，晶間顯微裂紋就從此兩區(qū)域之間發(fā)生av在线免费看污片，然后垂直地向里向外擴(kuò)展狠狠艹av。

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.

本文分析了在流動(dòng)氧氣氛和氨氧化反應(yīng)過(guò)程中Pd的表面化學(xué)狀態(tài)，表明在800℃以上溫度Pd的表面應(yīng)是1種多層結(jié)構(gòu)：光亮的Pd金屬表面復(fù)蓋著一層薄的Pd金屬蒸氣黄色日，Pd蒸氣上又復(fù)蓋著一層PdO蒸氣日韩在线不卡免费视频一区。

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

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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.

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