查询词典 acid-base

Caffeic acid phenethyl ester, a component of honeybee propolis, has been reported to hold various biochemical responses.

Caffeic acid phenethyl ester是多酚抗氧化化合物，是蜂胶主要成分之一；过去文献指出其具有抗发炎、抗氧化、抗病毒、抗肿瘤等作用。

The aim of this work is to simultaneously identify the major impurities, it's concentration and optical isomers in MA samples. Gas chromatography/mass spectrometry with selected ion monitoring was employed after drugs were derivatized with--α-methoxy -α-phenylacetic acid.

本实验的目的，就是利用气相层析质谱仪配合化学对掌性衍生剂--α-methoxy-α- phenylacetic acid，以选择性离子侦测模式来进行分析，检测甲基安非他命中所残留的麻黄素与伪麻黄素的含量与旋光性。

Phthalic Acid Esters have been extensive used in industry,and become one of the most widely pollutants in environment.

邻苯二甲酸酯(Phthalic Acid Esters，简称PAEs)是一类重要的有机化合物，在工业上具有广泛的用途。

Based on the above experiments, the author studied the mixed metallic pillared and modified montmorillonites. The experimental result indicated that the microporous structure of Fe-Al-PLMs was affected by the changing of interlayer Fe-Al polymer with different Fe/Al ratio. But the presence of Al iron was helpful to incorporate Fe iron into interlayer of montmorillonites.. Introducing Zr helped Al-PLMs getting better larger spacing, thermal stability, surface area and pore volumes. Its successful to apply Zr-Al-PLMs to treat wastewater containing Cr iron. The experiment of modifying Al-PLMs by PVA showed that the order of adding starting materials (Al-pillaring solution, PVA, montmorillonite solution) was related to the property of Al-PLMs. The PVA as precursor was beneficial for Al to go into interlayer of the clay and to form larger basal spacing porous clay. The surface area and pore volumes of Al-PLMs increased mainly because of increasing the external surface area and mesoporous volumes after acid-activating. This conclusion confirmed that the microporous structure of pillaring clay depends upon the interlayer pillar.

实验结果表明：在Al-PLMs中引入Fe离子，不同Fe／Al比制得的Fe-Al-PLMs因层间的Fe-Al聚合离子结构不同而影响其微孔结构，但羟基Al离子的存在有利于Fe离子进入蒙脱石层间；在Al-PLMs中引入Zr离子，有助于其层间距、比表面积、孔体积增大，所得Zr-Al-PLMs应用于含Cr废水处理效果显著；PVA改性后的Al-PLMs其物化性质变化与铝柱化剂、PVA溶液、蒙脱石溶液三者不同添加顺序有关，说明PVA的前撑有利于Al进入蒙脱石层间得到较大层间距的Al-PLMs；经酸化处理得Al-acid-PLMs，其比表面积增大以外表面积为主，孔体积增大以中孔为主，这也证实了柱撑蒙脱石的微孔结构取决于其层间的柱化物。

Feb. 6, 2004 Valproic acid has no effect on pain in polyneuropathy, according to the results of a randomized, double-blind, placebo-controlled study published in the Jan.

Feb。 6， 2004 -根据一项随机、双盲及以安慰剂为对照组的研究结果显示，Valproic acid对多数神经性疼痛无疗效。

Refreshing agent contained 0.25% chitosan, 1% sodium lactate, 1% lactic acid and 250 mgkg^(-1) Nisin and MAP were used to determine microbial flora counts, psychrophilic bacteria counts, TBARS, carbonyl content and a* value of chilled meat to evaluate the effect of refreshing agent and MAP on chilled meat.

将复合保鲜剂（0.25%壳聚糖＋1%乳酸钠＋1%乳酸＋250mgkg^(-1) Nisin）与气调包装共同使用，测定冷却肉的细菌总数、嗜冷菌数、TBARS值（硫代巴比妥酸值，Thiobarbituric Acid-reacitive Substances）、羰基含量以及红度值，来综合评价保鲜剂与气调包装复合后对冷却肉的影响。

Quinolinic acid is an endogenous neurotoxin, that activates the N-methyl-D-aspartate receptor and the biosynthesis of NAD+ precursor.

Quinolinic acid是一种内生性的神经毒素，活化N-methyl-D-aspartate接受器以及在生物合成NAD+的前驱物。

The purpose of this research is to discuss the probable mechanism of acupuncture treatment combined with pharmacotherapy regulating glutamatergic function and anti-free radical effect on the dementia rats due to hippocampal CA, lesions induced by quinolinic acid. So that the author can provide the clinical application of acupuncture treatment combined with pharmacotherapy with experimental evidences in treating Alzheimers disease.

本文的研究目的是探讨针药结合对喹啉酸(Quinolinic Acid，QA)损毁海马CA_1区所致痴呆大鼠模型的中枢兴奋性神经递质谷氨酸(glutamate，Glu)和抗氧化指标的影响及其对提高痴呆大鼠学习记忆能力的可能机理，为临床针药结合治疗阿尔茨海默氏病(Alzheimers disease，AD)提供实验依据。

XC7201 is an interesting protein comprising 176 amino acids. Many sequences in the prokaryote and eukaryote kingdom with high similarity score were detected by BLAST search. It was predicted to a 3-hydroxyanthranilate 3,4-dioxygenase (3HAO), which is an extradiol dioxygenase that catalyzes the final conversion step of tryptophan to quinolinic acid in the kynurenine pathway.

XC7201由176个胺基酸所组成，比对已知物种资料库后发现在原核真核菌中都有类似的序列，其功能被预测为3-hydroxyanthranilate 3，4-dioxygenase (3HAO)。3HAO是一种双氧化酵素，在生物体进行把Tryptophan转变成Quinolinic acid的生合成途径中最后一个反应的催化。

Hibiscus protocatechuic acid, a simple phenolic compound, isolated from Hibiscus sabdariffa L.

原儿茶酸（protocatechuic acid， PCA）是一简单多酚类化合物，经由乾燥的洛神花萃取而来的。

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。