可回收性

Then in this disquisition by experiment of selectivity of pure Galenite and sphalerite, the rule is asscertained that the mine slurry pH and different adjust medicament and catch medicament and restrain medicament kinds and dosage affect flotation .

然后本研究通过对纯的方铅矿和闪锌矿物可选性的试验研究，确定了矿浆PH值、不同调整剂、抑制剂、捕收剂及活化剂的种类、混合配比和用量对浮选分离铅锌银矿石的影响规律，提出的适宜pH值范围、药剂种类及用量为实际矿石的铅锌分选和强化伴生银的回收奠定了良好的基础。

Firstly, a hybrid system about the start-up process of a leatheroid's DMF recovering plant has been studied, the hierarchical control model of this system was built using timed Petri nets and hybrid Petri nets theory. The monitoring method of start-up process was discussed by studying the coordination layer of this model, and the reachability method was adapted to analyze this model.

论文首先对混杂系统——人造革DMF回收开车过程进行了研究，结合赋时Petri网和混合Petri网建立了其递阶控制模型；通过对其协调层的深入讨论，研究了开车过程的监控问题，采用可达性等方法对模型进行了分析。

Strengthening responsibility regulations mainly include the perfection of contract guarantee policy in the exploitation of mines, land, and other major resources, the deposit refund system for potential pollutants or reclaimable solid refuse, and overall publication of environmental information.

完善政策主要是改进价格规制激励政策，包括继续改革排污收费制度、健全与排污收费相联系的环境税收政策、加快改革环境补贴政策等；推行排放许可证交易规制政策，主要包括建立排放许可有偿取得与排污交易工作平台、加强必要的能力建设和观念培训、选择适当范围进行试点、加强污染源的排放监测等；强化责任规制政策，主要包括在矿山和土地等重大资源使用中完善履约保证政策、对具有潜在污染性或可回收利用的固体废弃物实行押金返还政策、全面推行环境信息公开等。

Materials selection must now encompass a total engineering approach, by considering not only processing and properties, but also the maintenance, reliability, replaceability, and recyclability of a material.

不仅考虑加工和材料的特性，而且还要考虑某种材料的可靠性、可替换性和回收利用的可能性，现今对材料的选择必须包括整个工程学的方法。

The auxiliary can be recovered in high yield (81%) only by filtering and recrystallization. Besides, some other aldehydes have been chosen to test the enantioselectivity of N,N\'-dibenzyl tartamide, in comparison with two other allylaborates reagents developed previously by Roush and Brown, respectively. The results show that %e.e. of homoallylic alcohol is superior to that of the former, and approaches the Brown reagent.

产物经S_N2反应得瑞格列萘中间体-甲基烯丙基-2-氯苯基-叠氮甲烷(17)；同时，将筛选出的新型手性配体N-苄基酒石酸二酰胺用于其他几种醛(正丁醛，异戊醛和环己醛)的不对称烯丙基化反应，并与广泛应用的Roush配体(22)和Brown配体(27)相比较，发现其立体选择性优于Roush配体，并接近Brown配体，但明显具有可回收利用的优势。

Six experimental stages were designed in our procedure, those are:(1) metabolite recovery and tested sample preparation: the metabolites were recovered by Amberlite XAD-2 absorption, followed by MeOH elution and solvent concentration;(2) antioxidant detection and strain selection: samples were quantitatively analyzed by the inhibition effects on formation of lipid peroxides and TBARS to screen the strains able to produce antioxidants. According to the established screening methods, we chose out a strain of actinomycetes, designed as AMBL-029C;(3) antioxidant purification: the fermentation broth was recovered by a series of separation techniques including centrifugation, Amberlite XAD-2 absorption, followed by MeOH elution and a successive TLC purification. The resulting primary purified compound [temperately designed as AMBL-029C-TS] was further analyzed by HPLC to monitor its purity;(4) physical-chemical characteristics: judging from the acid-base fractionation experiments, and the pH and temperature stability tests, the compound was deduced to be a acidic compound with the properties of low polarity and highly pH and temperature stable;(5) mechanism of the antioxidant: in comparison with some other known antioxidants, TS was subjected to investigate its antioxidant mechanism, together with BHT,-tocopherol, as well as two streptomyces metabolites, homogentisic acid and -phenylpyruvic acid, which were previously isolated as the natural antioxidants in our laboratory.

针对本实验目的，我们设计了以下的实验步骤﹔（1）二次代谢物回收及检测样本处理：我们将发酵所得的培养上清液，利用疏水吸附性树酯Amberlite XAD-2吸附回收，并以甲醇溶离及真空减压浓缩脱水等方式处理，以取得提供抗氧化活性筛选之检测样本；（2）抗氧化活性检测及菌种筛选：以「过氧化脂质」和「硫丙二醯尿」的生成量进行定性定量分析以作为抗氧化物质生产菌筛选之用；经此筛选程序，我们选获了具有抗氧化物质高生产力的菌株，命名为AMBL-029C；（3）抗氧化物质的分离纯化：针对生产菌株的发酵回收处理液，以矽胶薄层色层分离法经物质层析纯化后，并以高效能液相层析法(High performance liquid chromatography；HPLC)分析物质可得一初级纯化物质，命名为AMBL-029C-TS；（4）抗氧化物质的物理化学性质分析：由酸碱转溶（acid-base fractionation）实验得知，此抗氧化物质属於中低极性的强酸性物质，对温度（37℃-100℃）及酸碱度（pH3.0-13.0）均表现出高稳定性；（5）在抗氧化机制探讨方面，我们针对数种不同的抗氧化机制进行探讨，即： 1。

The ore of arsenopyrite is very easy to float, but hard to inhibit, the experiment creatively forward to the "Select I" in the middling re-election, and then incorporated into the final railings discharge, re-election of concentrate back to roughing of the closed-circuit process. Succeeded in separation the iron of marmites and arsenopyrite the concentrate grade obtained Zn 41.56%, recovery rate is 93.08%, comprehensive collect silver, gallium, indium and other rare metals.

毒砂可浮性很好，易浮难抑，本试验创造性地提出了精选I的中矿再选、再选尾矿并入最终尾矿排放、再选精矿返回粗选的新闭路流程，成功地实现了铁闪锌矿与毒砂的有效分离，获得了锌精矿品位41.56％、回收率93.08％的指标，同时综合回收了银、镓和铟等稀贵金属。

Ionic liquid has intrinsically useful properties, such as thermal stability, lower melting point, negligible vapour pressure, acidity changeable and highly solvating, low viscosity and density.

离子液体与传统的纤维素溶剂相比，具有低挥发性、可回收利用、热性质稳定的优点，避免了有机溶剂所造成的污染。

Because of advantages such as containing metal-free, so the organocatalyst has not the potential risk of leaching of toxic metal ion to the environment; generally has good catalytic activity, some might exhibit peculiar character and catalytic mechanism as enzyme; easily handled, can be performed in solution or air without the necessity of severe conditions like water-free a...

因为其不含金属离子，不存在有毒金属离子泄漏而造成环境污染；一般具有较高的催化活性，有些显示出类似酶的特性和催化机理；反应容易操作，可在溶液或空气中进行，不需要无水无氧等苛刻条件；价格一般比较便宜，易于制备、修饰和改性，可调控性大；易于与产物分离及从反应体系中回收等一系列&绿色&的优点。

Because of advantages such as containing metal-free, so the organocatalyst has not the potential risk of leaching of toxic metal ion to the environment; generally has good catalytic activity, some might exhibit peculiar character and catalytic mechanism as enzyme; easily handled, can be performed in solution or air without the necessity of severe conditions like water-free and oxygen-free.

因为其不含金属离子，不存在有毒金属离子泄漏而造成环境污染；一般具有较高的催化活性，有些显示出类似酶的特性和催化机理；反应容易操作，可在溶液或空气中进行，不需要无水无氧等苛刻条件；价格一般比较便宜，易于制备、修饰和改性，可调控性大；易于与产物分离及从反应体系中回收等一系列&绿色&的优点。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。