查询词典 oxalic

The advantages of catalytic synthesis of oxalate ester in gaseous phase by carbon monoxide are summarized. The five important characterization of our patent technology invented for the use of industrial raw material and the potential good economic value of the process are presented. It indicates that study and development of catalytic synthesis of oxalate ester .oxalic acid as well as glycols by natural gas in gaseous phase have a great advantage for full utilization of natural gas....

概述了&CO气相催化合成草酸酯&技术的先进性，介绍用工业性原料为主要内容的专利技术：&气相催化合成草酸酯连续工艺&的五个主要特点及其潜在的经济效益，并指出，用天然气经合成气进行气相催化合成草酸酯和草酸、乙二醇的研究与开发，可使天然气得到充分的利用，具有很好的经济效益，是天然气化工综合利用的一条有效途经，也是当代C1化学的重要发展方向。

Most sugars, organic acids, phenolic acids and most amino acids increased significantly with elevated CO_2. The treatment, 950±50μmol·mol-1 CO_2 enrichment for 6 h every day had more obvious effects than the treatment, 950±50μmol·mol-1 CO_2 enrichment for 3 h every day. Levan, sucrose, arginine, oxalic acid, alanine, malic acid, acetic acid, lactic acid cinnamic acid,ρ- hydroxybenzoic acid and benzoic acid increased significantly.

CO_2施肥黄瓜根系分泌有机酸、氨基酸、糖和酚酸的总量增加，上、下午均施肥的处理分泌数量最多；CO_2施肥显著促进了果聚糖、蔗糖、草酸、苹果酸、乙酸、乳酸、多数氨基酸、肉桂酸、对羟基苯甲酸和苯甲酸等组分的分泌；单位鲜重根系分泌糖和酚酸的数量增加，多数氨基酸保持不变或降低，但有机酸分泌规律不一致。

According to the specification, the corrosion resistance of black oxide coating on iron and steel surface should be tested by oxalic acid spot test.

发黑时间约4 到5分钟，至形成均匀细密的黑色氧化膜。用自来水洗去工件表面的残留发黑液，用热风将其吹干待测。

The copper uptake by neon tetras exposed to copper complexed with EDTA, diaminoethane, oxalic acid, and tartaric acid was investigated.

通过暴露实验和化学形态计算方法研究了彩虹方头鱼对四种铜络合物的吸收。

The degradation of 2, 4-dichiorophoxyacetic acid (2, 4-D) by ozonation combined with sonication (03/US) was investigated. Based on the authors' first paper about the synergistic effect of ozone and US, this paper presents intermediate products of 2, 4-D degradation. The main intermediates were 2, 4-dichiorophenol, benzopuinone, hydroquinone and organic acids, such as maleic acid and oxalic acid and soon.

利用臭氧超声波联合工艺对苯氧羧酸类除草剂2，4-D进行降解研究，在前文探讨臭氧超声波之间协同效应的基础上，确定其中间产物种类主要有2，4-二氯苯酚、苯醌、氢醌以及小分子酸如顺丁烯二酸、草酸、甲酸、乙酸等。

The purification method is that the oxalic acid difluoro lithium borate needing to be purified is dissolved in solvent with high solubility first, then the solution is mixed with nucleation agent, the mixed solution is performed through solid-liquid separation, crystallized solid matters are put in a vacuum drying oven for drying, so that purified LiODFB products are obtained.

一种草酸二氟硼酸锂的提纯方法，该方法是先将需提纯的草酸二氟硼酸锂溶解在溶解性高的溶剂中，然后将该溶液与析晶剂进行混合，通过固液分离，将析晶出的固体物质置于真空干燥箱中干燥，即得纯化的LiODFB产品。

The formation of tin dioxide nanotubes on tin substrates anodizing in oxalic acid electrolytes and annealing in the air was investigated. Under optimized electrolyte, oxidation and anneal conditions, nanotubes of tin dioxide were fabricated.

单质锡箔片在草酸溶液中利用电化学阳极氧化合成出前聚体，并将前聚体通过加热氧化制备出具有纳米级孔道的二氧化锡材料。

Nano-SnO powders were prepared by sol-gel technique using tin dichloride, oxalic acid and dehydrated alcohol as raw materials, and characterized by thermogravimertric analysis and differential thermal analysis, X-ray diffraction, transmission electron microscope, scanning electron microscopy in combination with various electrochemical methods.

以氯化亚锡、草酸和无水乙醇为原料，采用溶胶－凝胶法制备了纳米SnO粉末，并用热重－差热分析、X-射线衍射分析、透射电镜和扫描电镜等多种电化学方法对其进行了表征。

The content of the three samples-acetic acid ,oxalic acid and citric acid was determined by second- time derivative.

利用二级微商法对醋酸、草酸、柠檬酸等3种样品含量进行了测定，对此分析结果表明，该方法是一种理想的、快速简便的、准确度高的电位滴定方法

On the other hand, sodium tungstate dehydrate complexed with oxalic acid can act as highly efficient catalysts for the transformation from alcohols to carbonyl compounds under controlled microwave irradiation and solvent-free conditions.

第二部分中，我们观察到，作为一种过程强化手段，微波具有显著的促进催化选择氧化反应加速进行的能力，这在多相的锰氧化合物体系和均相的钨酸钠—草酸催化体系中都有具体表现。

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。

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。