热化学的

On the basis of the data obtained from the cam-type plastometer, four prediction models including the BP, Elman, RBF and GRNN neural network prediction models were established, which corresponded to the relationship between the deformation stress of nickel-chrome steel with chemistry elements, temperature, strain rate and deformation strain of the steel respectively. A comparative analysis for the prediction accuracy of the four models was obtained.

以凸轮式高速形变试验机进行的热模拟压缩实验得到的实验数据为基础，建立了热轧铬镍钢的变形阻力与其化学成分、变形温度、变形速度及变形程度对应关系的BP、Elman、RBF和GRNN 4种神经网络预测模型；并对4种网络的训练过程和预测精度进行比较分析。

China Branch Shenwei developed out of the latest generation of HK series of plant gas furnace, by the barrel, purification equipment, pipes, stove and other components, plant fuel through the system of gas furnace, in a confined hypoxic conditions, the use of pyrolysis pyrolytic chemical oxidation reaction to produce a combustible gas, in support of nitrogen and oxygen the burning of the combustion to achieve the desired effect.

武汉华科神威科技发展有限公司研制开发出的最新一代HK系列植物燃气炉，由料筒、净化装置、管道、灶头等部分组成，植物燃料通过制气炉，在密闭缺氧的条件下，采用干馏热解化学氧化反应后产生一种可燃性气体，在氮气的支持和氧气的助燃达到理想的燃烧效果。

Since the day that reminding that year that month is under the stars in chemical/see you, my heart on the ripples of peace, with Mars, met the pure oxygen sticks, burning the aluminum and magnesium thermit had pitched into the water, potassium and sodium -- and all that god let me like you!

自那年那月那日那方星空下在化学楼见到你，我平静的心中泛起了涟漪，似：带火星的木条遇到了纯净的氧气，燃烧着的镁条遇到了铝热剂，投到水中的钾和钠——又都像那天上帝让我碰到你！

Excced high molecular weight polyvinyl(English curtaiment UHMW-PE)be thermoplastic engineering plastics it integrative all plastics's high-performance,but endure impulsive,anti-abrasive,endure chemistry eat away,oleiferous inhouse,absorb impulsive energy this 5 piece behavioural is now deposit that is among plastics all tiptop numerical value,already become 1 piece eye – catching complete new type turn-out .among Young city unctuous substance factory at country at country the department concend's energetically support below successfully trituration produce come out this turn-out And domestic get far-reaching application.

超高分子量聚乙烯(英文缩写UHMW-PE)是热塑料。它综合了所有塑料的优越性能，而耐冲击，耐磨性，耐化学腐蚀，自身润滑，吸收冲击能这五个特性乃是目前即存塑料中所有的最高数值。已成为一种引人注目的完全新型的产品，扬中市富朗橡塑有限公司在国家有关部门的大力支接下成功地研制生产出该产品，并在国内得到广泛的应用。

There are several remarkable features of MCM-41, such as well-defined pore size and shape, fine adjust-ability of the pore size within the limit, hexagonal arrangement of unidimensional channel, high specific surface, and high chemical and hydrothermal stability.

其显著的特性表现为：规则的六方孔道结构、狭窄的孔径分布、极高的比表面积以及孔壁较厚、孔径可调、具有较高的化学稳定性和水热稳定性。

The thermal decomposition of electroformed PbO2 showed two types of hydration water: the first type was physical adsorption water adsorbed on the surface of PbO2 particles and could be removed at low temperature, the second was chemical structural water localized within the PbO2 crystal structure and could only be ...

电化学形成的PbO2的热分解表明PbO2中存在两种类型的结构水：一种是吸附在PbO2颗粒表面的物理吸附水，可在较低温度下消失；另一种是位于PbO2晶格内部的化学结构水，只能在较高温度下失去。

From mineralogy, crystallochemistry and silicate physical chemistry point of view, this article mainly discussed the relationship of ingredient and crystal structure, the crystal habit of crystalline phases with different structure, and influences of thermodynamic conditions to crystal growth.

本文在纵观陶瓷发展史、了解前人对结晶釉的研究现状基础上，从矿物学、结晶化学以及硅酸盐物理化学的角度出发，主要研究K〓O-Na〓O-CaO-MgO-Al〓O〓-SiO〓系统结晶釉中成分与析晶体结构的关系，不同结构晶相的析晶特点，以及热动力学条件对析晶状态的影响等。

The effect of thermal and anaerobic ageing on the structure and properties of NR vulcanizates was studied.The crosslinking density and distribution of NR vulcanizates during ageing were determined with the method of devulcanization by using the chemical probes,and the physical and dynamic properties were also determined.

研究了热空气老化和真空老化对NR硫化胶结构和性能的影响，采用化学探测剂脱硫的方法测定了老化过程中NR硫化胶交联密度及交联键分布变化的情况，同时测定了硫化胶的力学性能和动态性能随时间变化的情况。

The results showed that expression plasmid pET22b-lysB was constructed successfully. Highly purified recombination protein was obtained 33.2 mg from 1 L LB culture medium. A screening for His-LysB activity on esterase and lipase substrates confirmed the lipolytic activity. With p-nitrophenyl butyrate as substrate, the thermal stability of the enzyme was poor when the temperature was above 30oC. The enzyme exhibited higher stability at pH 5.0–9.5. The optimum temperature and pH for the lipolytic activity of His-LysB were 23oC and 7.5 respectively. Under the optimum conditions, the specific activity of His-LysB was 1.3 U/mg. Zn2+, Cu2+, Mg2+, Mn2+and phenylmethane sulfonyl fruoride severely inhibited the lipolytic activity of His-LysB.

结果表明：成功构建了pET22b-lysB表达载体，并从1 L的LB培养物中获得了33.2 mg高纯度重组蛋白；His-LysB具有分解脂肪的能力，属于脂肪酶；生物化学特性分析表明：丁酸对硝基苯为水解底物，His-Lys热稳定性不佳，30℃以下比较稳定，随着温度的升高，稳定性逐渐降低；该蛋白具有较高的pH值适应性，pH 5.0~9.5范围内稳定性较高；在23℃和pH 7.5时酶活力最高，其比酶活为1.3 U/mg；金属离子Zn2+、Cu2+、Mg2+、Mn2+和苯甲基磺酰氟抑制剂对酶活具有强烈的抑制作用。

Flame retardants may interrupt or change the decomposition process in several ways:(1)they may melt at relatively low temperatures and resolidify in the form of a foam, which serves as a barrier to heat transfer from the flame to the substrate;(2) they may be converted upon heating into acids or bases, which catalyze the decomposition of the substrate at lower temperatures than are required for the formation of volatile combustibles;(3 ) they may decompose orsublime upon heating to release large amounts of nonflammable vapors which exclude oxygen from the flame; or (4) they may react with chemicakl species within the flame to stop the combustion reaction.

阻燃剂可以从几个方面干涉或改变织物的分解过程：（1）阻燃剂在相对较低的温度时会熔化，然后重新固化成泡沫状，这样就形成了一个屏障，阻止了从火焰向织物的热传递。（2）阻燃剂受热时会分解成酸或碱，这些酸或碱在低于可生成挥发性可燃物的温度下可以催化织物的分解。（3）阻燃剂在受热时会分解或升华，同时释放出大量不可燃气体，这就阻止了氧气对火焰的供应。（4）阻燃剂可以与火焰中的化学物质起反应，使燃烧反应终止。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。