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A method for the direct determination of auxins, indole acet ic acid,indole-butyric acid and naphthylacetic acid, by gas c hromatography with wide-bore capillary column is described.

建立了一种采用530 μm大口径毛细管色谱柱、不经衍生化处理而直接测定吲哚乙酸、吲哚丁酸和萘乙酸等植物生长素的气相色谱分析方法。

Respectively, glutamic acid derivatized β-CD has been synthesized with epoxy chloropropane as the intermediate, a water-insoluble yellow liquid was got after the acetylating of the by using acetic anhydride, which was used as a novel gas chromatographic CSP; A water-soluble β-CD polymer cross-linked with epoxy chloropropane has been synthesized, and the derivatives of β-CD polymer were synthesized by its alkylating and acetylating. The different β-CD derivatives were coated on silica capillary columns by dynamic method, the chromatographic properties and retention behaviors of the fused silica capillary columns were studied, the results showed that the β-CD derivatives had good stereoselectivity and separation results to some compounds, especially to various positional isomers and enantiomers.

本文还分别以环氧氯丙烷为中间体，合成了七{2，6-二-O-[3-(1，3-二羟基丙氨酸)]}-β-环糊精，再用醋酸酐将其乙酰化，得到了一种淡黄色粘稠液体，合成了一种新型的环糊精衍生物；以环氧氯丙烷作交联剂合成了一种水溶性的β-环糊精聚合物，再将其烷基化和酰基化，合成了β-环糊精聚合物的不同衍生物，用动态法将不同类型的β-环糊精衍生物涂渍在石英毛细管柱上，通过对所制备柱柱性能的测试和对一系列化合物的分离和保留行为的研究，结果表明所合成的β-环糊精衍生物对各类化合物，特别是对位置异构体和对映异构体具有较好的分离效果，显示了很强的立体选择性。

Macroporous resin is a kind of do not dissolve in acids, alkalis and various organic solvents of the organic polymers.

大孔吸附树脂是一种不溶于酸、碱及各种有机溶剂的有机高分子聚合物。

A chemical or chemicals viewed from the perspective of their structural characteristics. Included here are concepts which can mean either a salt, an ion, or a compound (e.g.,"Bromates" and "Bromides").

根据其结构特性划分的一种或一类化学物质，包括某种盐，某种离子或某种化合物，如溴酸盐及溴化物。

The invention comprises the following steps: one end of the optical fiber array is irradiated by an ultraviolet light for 5 seconds to 10 minutes and is put under 550 DEG C to 600 DEG C for 30 minutes to 5 hours; then is corraded by the acid.

本发明提供了一种生物芯片用光纤阵列的制备方法，包括以下步骤：将光纤阵列一端用紫外光照射5s～10min；然后在550℃～600℃下放置30min～5h；再用酸进行侵蚀。

Objective To study the effect of nitric oxide synthase inhibitor N-nitro-L-arginine methyl ester on extinction of cued fear.

目的 探讨一氧化氮合酶抑制剂N-硝基－L-精氨酸甲酯对大鼠线索性恐惧消退的影响。

A new method of preparation for deodorizing and antibacterial cellulose fiber was proposed.

采用一种制备消臭、抗菌纤维素纤维的新方法，即先将纤维素纤维用多元羧酸进行化学修饰，然后在铜氨溶液中处理，生成铜螯合纤维素纤维。

The present invention belongs to the field of chemical technology, and is especially high selectivity catalyst for hydrogenating dimethyl maleate to prepare tetrahydrofuran and its preparation process.

本发明属于化工技术领域，具体是一种用于马来酸二甲酯加氢制四氢呋喃的专一选择性催化剂及其制备方法。

A colorless poisonous volatile liquid acid that hydrolyzes readily to ammonia and carbon dioxide.

一种无色有毒的挥发性液态酸，容易水解为氨水和二氧化碳。

L-ornithine is a kind of middle metabolizing production, which is not make of protein.

L-鸟氨酸是人体代谢中必不可少的中间代谢产物，一种非蛋白质氨基酸。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。