酚的
- 与 酚的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The thesis applies the principle that organism and organic reagent can visualize in some condition and produce color association polymer. We have tried several organic reagents in order to build color reaction for berberine; at last, we find that thymol blue can react with berberine with good results.
Spectrophotometric Determination of Berberine using Thymol Blue-化学工程与工艺-利用有机化合物与有机试剂在一定的条件下能显色生成有色缔合物的原理,尝试了铬兰黑R、百里香酚蓝、甲酚红等多种有机试剂与盐酸小蘖碱的显色反应,结果发现麝香草酚蓝与盐酸小蘖碱的显色反应较好。
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Turthermore, the technological measures in ensuring beer abiological Stability were given in the production of Saecharification, fermentation, filter and filling and package.
就啤酒酿造过程中的蛋白质、多酚、氧物质对啤酒非生物稳定性的影响机理进行了分析阐述,说明了高分子蛋白质和多酚物质是影响啤酒非生物稳定性的主要因素;并就糖化、发酵、过滤、灌装各生产工序提出了工艺控制措施以保证啤酒的非生物稳定性。
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The changes of ultrastructure , the alteration of the level of polyphenol compounds, reactive oxygen speciesand the activities of polyphenol oxidase in Laminaria japonica against infection of alginic acid decomposing bacteria were investigated.
在用这些菌株对海带进行的侵染实验中,研究了海带发病过程中超微结构的变化,海带体内多酚类化合物、活性氧含量的变化,以及多酚氧化酶活性的变化。
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Resonance light scattering spectrum of cadmium- phenanthorline- bromophenol blue system has been studied. The effects of interference substances and optimization of procedure have been investigated. In the presence of Tris-HCl(pH=9.60),Cd2+ reacts with Phen to form the chelate cation, which further reacts with acid dye of BPB to form an ion-associated complex. Then, the complex molecules are accumulated to particles by virtue of hydrophobic forces and other molecular forces. This results in significant enhancement of RLS intensity, and the enhanced intensity of RLS at 638nm is proportional to the concentration of Cd~(2+).
研究了镉-邻菲罗啉-溴酚蓝体系在碱性条件下的共振光散射光谱特征,考察了体系的影响因素和最佳反应条件,研究表明,在pH=9.60的Tris-HCl介质中,镉与邻菲罗啉形成络阳离子,再与酸性染料溴酚蓝形成离子缔合配合物,在疏水力等分子间作用力下,缔合物分子聚集形成缔合微粒,溶液的共振散射光显著增强;在638nm处RLS增强程度与镉浓度成线性关系,线性范围为0-3.20mg/L,检出限为4.50ug/L。
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The chemical structure of the product was characterized by means of the melting point and IR. The results show that tetraethylammonium bromide which was used as a phase transfer catalyst in this reaction had optimization effect on the interfacial diffusive reaction of BTC and PNP. Higher concentration of sodium hydroxide, lower temperature and a higher dosage of BTC produced a small amount of 4-nitrophenyl chloroformate, while lower concentration of sodium hydroxide and a lower dosage of BTC made reaction incomplete, which affected the yield.
结果表明,在碳酸二(4-硝基苯基)酯合成中使用的相转移催化剂四乙基溴化铵对受界面扩散控制的BTC气与对硝基酚钠反应有良好的相转移催化效果;氢氧化钠质量分数较低时,酚钠盐向溶有BTC的油相扩散速度较小,较高时会产生氯甲酸对硝基苯酯;温度较低、BTC量较高时,会产生少量氯甲酸对硝基苯酯,BTC用量较低会使反应不完全,这些都影响着收率。
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Results The levels of HSP 70 mRNA and HSP 70 protein expression were significantly different among the 5 groups. Ketamine induced marked HSP 70 mRNA and HSP 70 protein expression in the posterior cingulated cortex. Propofol itself did not induce HSP 70 gene expression in this brain region. Propofol significantly inhibited ketamine-induced HSP 70 mRNA and HSP 70 protein expression in the posterior cingulate cortex in a dose-dependent manner.
结果氯胺酮可明显诱导HSP70 mRNA与HSP70蛋白在大鼠后扣带回皮质区的表达;异丙酚自身不能诱导HSP70基因的表达;预先给予异丙酚可显著抑制氯胺酮诱导的HSP70 mRNA和HSP70蛋白在这一区域的表达,且抑制效应呈剂量依赖性。
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It was found that the more easily systhesized and stable N, N-acetal or N, Ohemiacetal can replace N-tosyl imino ester to react with phenols in the presence of TiCl〓, and α-arylglycine derivatives were also obtained in high yields and high regioselectivity.
进一步研究发现,更易合成的N,N-或N,O-缩醛可以作为亚胺酯的替代物和酚类化合物发生傅克反应。路易酸TiCl〓能有效地促进酚类化合物和亚胺酯的傅克反应较高产率、较高区域选择性的得到2-羟基α-芳香甘氨酸衍生物。
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Surface waxes of the pericarp were observed by scanning electron microscopy; the structure and composition of cell wall were studied using light microscopy, transmission electron microscopy and Fourier transform infrared microspectroscopy respectively; the changes of calcium in the cell wall were determined by atomic absorption and the integrity of cell membrane by conductivity meter respectively.
本论文采用扫描电子显微镜研究果实表皮蜡层的变化,用光学显微镜、透射电子显微镜和傅里叶变换红外光谱仪研究果实细胞壁结构和成分的变化,用原子吸收分光光度计测定细胞壁钙离子的变化,用电导率仪检测果实细胞的完整性。同时测定了果实酚类物质含量、多酚氧化酶(EC 1.10.3.1)活性、过氧化物酶(EC 1.11.1.7)活性,并分析了果实硬度、糖和酸含量等品质指标。
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Naphthyl ethyl ether is synthesized from β-naphthol and ethyl alcohol by using nanometer complex heteropoly acid as catalyst.
该反应的最佳条件是:在酚醇物质的量比为1∶3.5,催化剂用量为0.6 g/0.04 molβ-萘酚,反应时间的7 h,β-萘乙醚的收率可达65.81
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The mechanisms of intramolecular biaryl nonphenolic coupling were explored by reactions of different 1,4-biaryl substituted butanes with DDQ in TFA.
通过对含不同取代基的芳环化合物、1,4-二芳基丁烷链上含不同取代基化合物与DDQ在TFA中进行非酚氧化偶合和重排反应的研究,对分子内的二芳基非酚氧化偶合反应机理作了深刻的探讨。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。