硫黄的

The results show that for collectors of the same kind, their selectivity is in linear relationship with HOMO energy and can be predicted well. For collectors of different kinds, it can be concluded from shape of HOMO and atomic HOMO density that the selectivity of ethoxycarbonyl thionocarbamates is better than the one of xanthogen formates.

结果表明：对于同种类型的捕收剂，其选择性与HOMO能量呈线性关系，依据HOMO能量能较准确地预测这两种捕收剂的选择性能；对于不同种类的捕收剂，通过对HOMO形状以及组成原子的HOMO密度的讨论可知，乙氧羰基硫氨酯类捕收剂的选择性能要比黄原酸甲酸酯类捕收剂的强。

The silver accessories nigrescence changes yellow is the normal natural phenomenon, because in the air and other natural medium's sulfur and the oxide compound and so on have certain corrosive action to the silver, after wearing period of time, will present some small spots, the long time will proliferate Large expanse, will turn the black.

银饰品变黑变黄是正常的自然现象，因空气和其它自然介质中的硫和氧化物等对银都有一定的腐蚀作用，在佩戴一段时间后，就会出现一些微小的斑点，久之会扩散成片，甚至变成黑色。

For this,experimental study was made on a new process of potential-controlled preferential flotation in a sequency of copper,lead and zinc,which used LP-01 as collector for copper mineral,DDTC as collector for lead mineral,copper sulfate and butyl...

为此，以LP-01为铜矿物的捕收剂、乙硫氮为铅矿物的捕收剂、硫酸铜和丁黄药为锌矿物的活化剂和捕收剂、石灰为矿浆电位调整剂，并在选铜、铅时配合使用铅矿物的组合抑制剂ZnSO4+YN，对该多金属复杂硫化矿进行了电位调控铜、铅、锌依次优先浮选新工艺试验研究，获得了含铜21.74%、铜回收率62.31%的铜精矿，含铅61.23%、铅回收率55.07%的铅精矿和含锌56.43%、锌回收率90.02%的锌精矿。

Molecular structures of fourteen 6-thioxanthine tautomers were calculated by the B3LYP/6-311G** method, both in gas and aqueous phases, with full geometry optimization. The Onsager solvate theory model was employed for aqueous solution calculations.

在密度泛函B3LYP/6-311G**水平下，对14种气相和水相中可能存在的6-硫代黄嘌呤异构体进行了几何构型的全自由度优化，并计算出它们的总能量、焓、熵、吉布斯自由能。

Carotenoids in carrots and tomatoes, isothiocyanates in broccoli and cabbage, and flavonoids in soy, cocoa and red wine are just a few examples.

象胡萝卜和番茄中的胡萝卜素，花椰菜和洋白菜中的异硫氰酸酯，大豆，可可粉和红酒中的黄酮就是一些例子。

Carotenoids in carrots and tomatoes, isothiocyanates in broccoli and cabbage, and flavonoids in soy, cocoa and red wine are just a few examples.

例如，胡萝卜和番茄中的类胡萝卜素、椰菜和卷心菜中的硫氰酸盐、以及大豆、可可和红酒中的类黄酮。

With butyl xanthate as a collecter, the flotation behavior of jamesonite, pyrrhotite and marmatite, the depressing effects of small mercapto organic depressant (mercaptoacetic acid, mercaptoethanol ) and the effect of Cu2+ ion on depressing ability of mercapto compound were studied through flotation test and infrared spectrum.

摘 要：通过浮选实验、红外光谱测定，考察了脆硫锑铅矿、磁黄铁矿和铁闪锌矿在丁黄药作用下的浮选行为和巯基类小分子有机抑制剂对三种矿物的抑制效果以及Cu2+离子对巯基化合物抑制效果的影响。

The results are in good agreement with available experimental results. The entropy effect on the Gibbs free energies of 6-thioxanthine base is very small and there is little significance for the tautomeric equilibria of the base.

计算结果同已有实验结果一致。6-硫代黄嘌呤异构化的熵效应小，对互变异构平衡几乎没有显著的影响，而焓变对互变异构产生了主要的影响。

Properties of frontier orbital of xanthogen formates and ethoxycarbonyl thionocarbamates, including HOMO energy, shape of HOMO and atomic HOMO density, were calculated with quantum chemistry programs GW03 and FUJISTU CAChe. According to the results, the relationship between selectivity of such two kinds of collectors and their quantum chemical indices was investigated to discuss the feasibility of applying them in screening chalcopyrite collectors.

摘 要：利用量子化学软件GW03和FUJISTU CAChe计算黄原酸甲酸酯类、乙氧羰基硫氨酯类黄铜矿捕收剂的前线轨道的性质—HOMO能量、HOMO形状以及药剂组成原子的HOMO密度，并结合这两类药剂的浮选结果研究这些量化参数与药剂选择性之间的联系，探讨这些参数作为选择黄铜矿捕收剂判据的可行性。

CoCl2 (a chemical hypoxia-mimetic agent) was used to establish the chemical hypoxia-induced PC12 cell injuries model. Sodium hydrosulfide was used as a H2S donor. The viability of PC12 cells was measured by CCK-8 assay. The percentage of apoptotic cells was assessed by propidium iodide stain flow cytometry. The morphological change of apoptotic cells was tested by using the chromatin dye Hoechst 33258. The mitochondrial membrane potential was analyzed by rhodamine 123 staining and photofluorography. The level of reactive oxygen species in PC12 cells was measured by DCFH-DA staining and photofluorography.

应用化学性缺氧模拟剂CoCl2在PC12细胞建立化学性缺氧损伤模型；以硫氢化钠作为H2S的供体；应用CCK-8比色法检测细胞存活率；碘化丙啶染色流式细胞技术检测细胞凋亡率；Hoechst33258染色检测细胞凋亡的形态学变化；罗丹明123(Rh123)染色荧光显微镜照相检测细胞线粒体膜电位；2'，7'-二氯荧光黄双乙酸盐染色荧光显微镜照相检测细胞内的活性氧水平。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失