查询词典 bell metal

The macrocyclic polyamines are a kind of excellent ligands and have a substantially high binding affinity with transition metal ions. Macrocyclic polyamine metal complexes as enzyme models are widely used in chemical biology, medicine and gene therapy. 1, 4, 7, 10-tetrazacyclododecane is a representative macrocyclic polyamines compound and shows high binding affinity with transition metal ions, such as Zn, Cu and Co. Their metal complexes especially multinuclear complexes were widely used in DNA, RNA recognition.

大环多胺化合物是一类性质独特的优秀配体，具有良好的金属配位能力，其金属配合物作为人工酶模型广泛应用于核酸结构及功能研究、基因表达与调控、抗癌药物的研制等生物、化学和医学领域。1，4，7，10-四氮杂十二烷是典型的大环多胺化合物，对过渡金属离子Zn， Cu and Co有良好的配位能力，这些金属配合物特别是多核金属配合物被广泛应用于DNA识别中。

Aiming at local hydrological feature, the problem of transport and transformation of heavy metal in river network regions through mathematical modeling at the first time. Establishing modeling of heavy metal transport and transformation, dissolved heavy metal was the main research goal and the synthetically sedimentation coefficient was imported to investigate the migration of heavy metal between aquatic phase and sedimental phase.

针对区域水文特点，首次采用数学模拟的方式对平原河网地区的重金属迁移转化问题进行研究；建立重金属迁移转化模型，以溶解态重金属为主要研究对象，通过引入综合沉降系数分析重金属水相和沉积相之间的相互迁移过程。

A method for producing fatty acid alkyl esters and/or glycerin comprising a step of bringing a fat or oil into contact with an alcohol in the presence of a catalyst, wherein the catalyst is at least one catalyst selected from the group consisting of the following to: a metal oxide having an ilmenite structure and/or a slyrankite structure; an oxide containing a metallic element belonging to the Group 12 and a metallic element belonging to the Group 4; a mixed oxide containing a metallic element belonging to the Group 12 and a tetravalent transition metallic element; a metal oxide containing zirconium and at least one metallic element selected from the group consisting of metallic elements belonging to the Groups 4, 5 and 8; and a metal oxide containing anatase type titanium oxide and/or rutile type titanium oxide, and the metal oxide containing a sulfur component of 700 ppm or less.

脂肪酸烷基酯和/或甘油的制造方法包括在催化剂的存在下使脂肪或油与醇接触的步骤，其中，所述催化剂是选自由下列～所组成的组中的至少一种催化剂：具有钛铁矿结构和/或斯里兰卡石结构的金属氧化物；含有属于第12族的金属元素和属于第4族的金属元素的氧化物；含有属于第12族的金属元素和四价过渡金属元素的混合氧化物；含有锆和选自由属于第4、5和8族的金属元素所组成的组中的至少一种金属元素的金属氧化物；和含有锐钛矿型氧化钛和/或金红石型氧化钛的金属氧化物，并且所述金属氧化物含有的硫成分为700ppm以下。

The invention discloses an electrochemical method for preparing a hydroxylapatite particle thin coating on the surface of a metal implant, which comprises the following steps: electrolyte is put into a container equipped with a constant temperature heating system and heated to be 30 DEG C to 95 DEG C, and then the temperature is kept; platinum is taken as the anode and evenly distributed around the container, and the metal implant is taken as the cathode, put in the middle of the container and totally soaked in the electrolyte; DC voltage of 2V to 4V is added between the anode and the cathode, the surface of the metal implant has cathode reduction reaction, the pH value is increased and the supersaturation degree of the hydroxylapatite is also increased, so as to crystalize on the surface of titanium; after 0.5h to 5h of deposition, a layer of hydroxylapatite particle thin coating which can be excellently adhered to the matrix metal is formed on the surface of the implant.

本发明公开了一种在金属植入体表面制备羟基磷灰石颗粒薄涂层的电化学方法，在装备了恒温加热系统的容器中装入电解液，并将电解液加热到30～95℃恒温；将铂作为阳极均匀分布在容器四周，金属植入体作为阴极置于容器中间，完全浸没在电解液中，两极之间加直流电压2～4V，金属植入体表面发生阴极还原反应，pH值升高，羟基磷灰石过饱和度增加，从而结晶在钛金属表面；经过0.5～5小时沉积后，在植入体表面即可形成一层与基体金属结合优良的、薄的羟基磷灰石颗粒薄涂层。

Seeing that the basic researches of the method of metal magnetic memory insufficiently, this text has done the following work mainly:(1)Studied the basic theory of the method of metal magnetic memory;(2)Studied the signal of metal magnetic memory of samples both anneals and not anneals in natural magnetic field and drive magnetic field under the drawn loads;(3) Studied the signal of metal magnetic memory of anneals samples in three magnetic fields under the drawn loads.

鉴于其基础研究工作不足，本文主要做了如下工作：(1)系统地研究了金属磁记忆检测技术的基本理论：(2)研究了退火试件和未退火试件在自然磁场和激励磁场环境中进行拉伸的磁记忆信号；(3)研究了退火试件在三种磁场环境中进行拉伸试验的磁记忆信号。

By adopting the technique of " making metal su*****ce flat and smooth with micro rheology " and the technique of " Ion Penetration Filling ", YG-ER Antifriction Metal Conditioner carries out fast regulation for the metal su*****c e of rubbing couples and forms a stiff and smooth metallic abrasion proof layer on the metal su*****ce under the rubbing effect, converting the friction between metals to that between metallic abrasion proof layers.

YG-ER 抗摩擦金属调理剂乃采用&微流变金属表面塑性整平&技术和&离子渗透填补&技术，对摩擦副金属表面进行快速调理，使金属表面在摩擦作用下形成一种坚硬、光滑的金属抗磨层，变金属与金属之间的摩擦为金属抗磨层与金属抗磨层之间的摩擦，以此克服金属摩擦带来的负面影响。

ABSTRACT The research of metal transfer in metal gas arc welding is of great significance for the control of arc welding process and quality, the improvement of existing welding technology and the development of new welding equipment. With the powerful aid of welding arc spectrum which contains plenty of information of metal droplet transfer, this dissertation, which mainly aims at putting forward an effective detecting method with arc spectrum signal, has inspected the spectrum of metal gas welding arc and discovered their dynamic characteristics of each kind droplet transfer mode.

熔化极气体保护焊熔滴过渡的研究，对于焊接过程及质量控制、焊接工艺方法的改进和新型焊接设备的推出都具有重要意义，而熔化极气体保护焊电弧光谱中含有丰富的反映熔滴过渡的信息。

In the research area , To study the correlation between heavy metal elementss indicates that, between the heavy metal elements, the heavy metal and other elementss have the co-function and the anti- function, and this strengthen the corn to bear the heavy metal the ability Possibly.

对研究区重金属元素间的交互作用进行研究表明：重金属元素间、重金属和其它元素间存在协同或拮抗作用，可能增强玉米耐重金属的能力。

Hua Yu Hardware Products Factory is a production of various kinds of metal products, gifts, jewelry, household items, handbags accessories, garment accessories, such as the professional manufacturers, production equipment have zinc alloy die-casting machine, metal stamping, hydraulic machine, to produce alloys, copper, iron, aluminum and other metal products, main products have handbag accessories, garment accessories, buttons, nails, chain, belt buckle, belt, necklace, brooch, fashion jewelry, gifts and so on, complete advanced production equipment, from mold development to finished production at one go and currently employs 260 people, technical personnel 30 people, factories located in China hardware city of Chang'an Town, Dongguan City and strategic location, Changan is all kinds of metal materials, molds, tools, accessories, processing and electroplating of concentration for the plant in lower costs, improve efficiency, quality control, such as a very great help, our product export Europe, America and Japan-based products in environmental protection, Needle detector to achieve requirements of the European Union and Japan.

华钰五金制品厂是一家生产各类金属制品，礼品，饰品，家居用品，手袋配件，服装辅料等的专业厂家，生产设备有锌合金压铸机，五金冲压，油压机，可生产合金，铜，铁，铝等金属产品，主要产品有手袋配件，服装配件，钮扣，钉，链条，皮带扣，腰带，项链，胸针，时尚饰品，礼品等，生产设备先进齐全，从模具开发到成品制作一气呵成，现有员工260人，技术人员30人，工厂地处中国五金重镇东莞市长安镇，地理位置优越，长安是各类五金材料，模具，工具，配件，加工及电镀之集中地，为工厂在降低成本，提高效率，控制品质等带来非常大的帮助，我们的产品以出口欧美及日本为主，产品在环保，检针方面达到欧盟及日本要求。

The company is headquartered in Spainù Provinceá City, specializing in rubber metal products design, production and sales, product is the basic damping of flexible pieces mainly, including rubber and metal flexible joints, for the locomotive spring rubber metal parts, rubber metal bearing, progressive cone and planar shock absorbers, such as cylinder piston.

公司总部位于西班牙基普斯科瓦省乌尔尼塔市，专门从事橡胶金属产品的设计、生产及销售，产品基本是以减震柔性件为主，包括橡胶及金属弹性关节，用于机车的橡胶金属弹簧件，橡胶金属支座，渐进式圆锥及平面减震器，气缸活塞等。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。