查询词典 phenolic

In this paper,the granite polishing abrasive tools are developed and manufactured by hot-pressing,in which powder phenolic resin is used as bond and a few soft materials are used as abrasives.

研制了一种花岗石抛光磨具，该磨具采用粉末酚醛树脂作结合剂和几种软磨料复配混合热压而成。

Polyphenol compounds were extracted from the sorghum groats by water and methanol. Total phenolic content, reducing power, chelating activity, DPPH radical scavenging activity, ABTS radical cation scavenging activity and inhibition of hydroxyl radical-mediated 2-deoxy-D-ribose degradation of the extracts from the sorghum groats were determined.

以水和甲醇为溶剂提取高粱籽粒中的多酚类化合物，测定了提取物中的总酚含量、还原力、Fe~(2+)络合能力以及提取物对DPPH、ABTS、羟基自由基的清除能力。

With oxalic acid and hexamethylenetetramine as the catalysts, and phenolic resin and tetraethoxysilane as the starting materials, a two-step sol-gel processing is developed for preparing Si〓N〓/SiC precursors with homogeneous microstructure composed of nanometer sized particles.

用草酸和六次甲基四胺为催化剂，酚醛树脂和正硅酸乙脂为原料，探索出了制备结构均匀而精细的Si〓N〓／SiC前驱体的溶胶—凝胶两步法。

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

This is exactly opposite to the order of E465/E665 in HA and the order ofΔ~ K. It shows that the larger the extent of humification, the larger the effect for reducing the rate of Phoxim hydrolysis, because the extent of HA humification is closely related to the extent of benzene in HA and the amount of carbonyl, aryl, phenolic hydroxide.

因腐殖酸腐殖化程度与腐殖酸芳构化程度、羧基、羰基和酚羟基的含量等相关，因此用腐殖酸腐殖化程度反映腐殖酸对农药水解作用大小比仅用腐殖酸中有机碳含量等因素反映更为合理。

Be opposite through comparing colophony the difference of the phenol in age alkyl and the adsorptive function with adjacent phenolic nitrobenzene, proved colophony to be opposite further the phenol in the system that be not water kind corporeal adsorption is the mechanism that is based on hydrogenous key action.

通过比较树脂对正庚烷中苯酚和邻硝基苯酚的吸附性能的差别，进一步论证了树脂对非水体系中酚类物质的吸附是基于氢键功能的机理。

This paper studied the categories and contents of phenolic compounds in greenhouse continuous cropping soil, and their effects on the growth of Cucumis sativus seedlings and Fusarium oxysporum hypha.

研究了不同连作年限大棚土壤中酚酸物质的种类、含量及其对黄瓜幼苗和枯萎病菌菌丝生长的影响。

AIM:To establish a HPLC method for simultaneous determination of five phenolic acid from leaves of Ilex purprea Hassk.

目的：建立一种同时测定四季青中5种酚酸类成分的含量测定方法。

The recoveries of the five compounds were between 95％ and 105％. CONGLUSION:This method is simple and effective, and can be used to determine phenolic acids from leaf of Ilex purprea Hassk.

首次建立了同时测定四季青中5种酚酸类成分的含量测定方法，可以用于同时测定四季青中的5种酚酸类成分的含量。

The effects of different solvents on impregnation and properties of silica /phenolic composites were compared and studied,i.

对比研究乙醇、丙酮和四氢呋喃溶剂对RTM成型石英/酚醛复合材料溶液浸润过程和性能的影响。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。