含硒的

The MS showed that the ratio of relative abundance ratio of two main Se isotopes is about 2:1, which can give important information for identifying molecular or fragile ions of selenium.

所有化合物均可获得特徵质谱，表现出含单个硒原子的分子离子或碎片离子特徵峰簇，硒的两种主要同位素在峰簇中表现为主要峰M与(M-2)的相对丰度比约为2：1，可为鉴定含硒分子离子或碎片离子提供重要信息。

In the biological treatment, anaerobic biological treatment is used to reduce selenate ions and/or selenite ions presented in the raw wastewater to transfer to single insoluble selenium.

在生物法中，采用厌氧生物处理来降低原始废液中可溶的硒酸盐与亚硒酸盐，并转化为不溶性的单质硒，从而以不溶性单质硒的形式去除硒酸盐或亚硒酸盐；在絮凝沉淀法中，通常是向生物处理后的废水中加入一种金属盐，使该金属盐与可溶性硒反应并生成一种不溶性硒化合物，从而以不溶性硒化合物形式去除残留的可溶性硒；在过滤法中，将絮凝沉淀法中残留在废水中的不溶性硒去除，这样就能在不用大量化学药剂和不产生大量沉淀的情况下去除含硒废水中的可溶性硒。

Protection by selenium in the mammalian cell is mediated by selenol-aminoacids, either as selenocysteine or selenomethionine.

硒在哺乳动物细胞中的保护作用受含硒氨基酸如硒半胱氨酸、硒蛋氨酸的调控。

The present invention discloses one kind of mesoporous titania material containing selenium and its preparation process.

本发明公开了一种含硒的介孔氧化钛材料及其制备方法。

The chapter two was focused on the samarium diiodide promoted organic reactions and their applications in organic synthesis, firstly, a new synthesis of highly substituted cyclopentadienes from a,β-alkynone promoted by samarium diiodide was investigated and the highly substituted cyclopentadienes were prepared in moderate to good yields under mild conditions. Secondly, the Michael addition and Michael-aldol tandem reaction of diorganyl diselenides or diorganyl disulfides with α,β-alkynones mediated by samarium diiodide were studied and a series of alkenylsulfides and alkenylselenides were prepared in good yields. Then the highly regioselecfive nucleophilic addition of the allylsamarium bromide to α,β-alkynones were explored. We found that the allylsamarium bromide reacts with α,β-alkynones to afford regiospecificly 1. 2-nucleophilic addition products in good yields under mild condition. At last we studied the coupling reaction of aryl halides promoted by NiCl〓/PPh〓/Sm〓.

第二章 研究了二碘化钐、金属钐促进的有机反应：1、二碘化钐促进下α，β-炔基酮的偶联环化反应，提供了一种制备多取代环戊二烯的新方法；2、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮的Michael加成反应，为高产率地制备多取代的烯基硫或烯基硒化合物提供了方便可靠的新方法；3、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮和醛、酮的Michael—aldol串联反应，提供了一种一锅法高产率地制备多取代的含硫的烯丙基醇或含硒的烯丙基醇类化合物的方便可靠的原子经济性的新方法；4、烯丙基溴化钐与α，β-炔基酮的高度区域选择性的1，2-亲核加成反应；5、NiCl〓/PPh〓/Sm〓促进的卤代芳烃的偶联反应-一种从各种卤代芳烃制备联苯类化合物的有效方法。

The source and composition of selenium residue from hydrometallurgical treatment of copper anode slime is introduced.

介绍了铜阳极泥湿法处理过程中硒渣的来源及其成分，并且通过理论分析和试验证明采取真空蒸馏可以回收硒渣中的硒，所得到的粗硒含硒量大于96%。

Male weanling Wistar rats were fed with either a basal selenium deficient diet (a Torula yeast based semisynthetic diet, containing Se 0.01 mg/kg) or a selenium sufficient diet supplemented with Se as Na\-2SeO\-3 (containing Se 0.5mg/kg). Rats were killed after different weeks(0,1,2,4,8,12,15,17,19,20 and 24 respectively).

以低硒酵母配制的低硒基础饲料(含硒量为0.01mg/kg)和在此基础上加亚硒酸钠配成硒水平为0.50mg/kg的足硒饲料来喂养雄性Wistar断乳大鼠。

By above studies, this paper proposes for the first time that a selenium-containing isoperoxidase may exist in germinating barley.

通过以上研究，本文首次提出了大麦苗中存在一种含硒的过氧化物酶同功酶。

The experiments on 11 crops cultivation, including wheat, rapes, sweet potato sesames, leeks and so on, were carried out in Jingzhou as selenium resources from selenium mineral powders, complex fertilization of containing abundant selenium and Na2SeO3 in high selenium area.

以源自高硒区的硒矿粉、富硒复混肥和Na_2SeO_3为硒源对小麦、油菜、红薯、芝麻、韭菜等十一种作物在荆州进行了异地富硒栽培试验和提高硒矿粉利用率的试验，得出如下结论： 1。应用硒矿粉、富硒复混肥和Na_2SeO_3作为硒源均能提高试验作物的硒含量水平，以土壤施入和叶面喷施的方式均能升高作物的含硒量，可以作为富硒栽培的一个重要措施。

Results were shown as followings:(1) Sodium selenite at 0～2.5 μmol/L significantly increased the antioxidative capacity of L-02 cells without having remarkable impact on SMMC-7721 cells;(2) Sodium selenite at concentrations above significantly increased telomerase activity, hTERT gene expression and telomere length of L-02 cells without significant impact on SMMC-7721 cells;(3) Sodium selenite at higher concentrations (larger than 5 μmol/L) resulted in peroxidation of L-02 cells, while scutellarin significantly counteracted its effect;(4) Selenium-rich amino acids from silkworm pupas in the range of 0.5～2.5 μmol/L Se significantly inhibited SMMC-7721 cell growth, induced apoptosis and cell cycle change, and the generation of reactive oxygen species. In contrast, sodium selenite and selenomethionine only had weak impact on them at the same concentrations;(5) A new selenium-containing protein was found from selenium-rich silkworm pupas, which is worthy to be study further;(6) An expression vector containing ansense RNA of hTERT gene were constructed and used to transfect SMMC-7721 cells. They were observed to inhibit hepatoma cells.

结果如下：（1）0～2.5μmol/L亚硒酸钠显著性增强L-02细胞的抗氧化能力；而对SMMC-7721细胞的作用不显著；（2）该浓度硒显著性提高L-02细胞端粒酶活性、增强hTERT基因表达和延长细胞端粒长度；而对SMMC-7721细胞的作用均不显著；（3）高浓度硒（5μmol/L以上）显著性抑制L-02细胞生长、致细胞过氧化，灯盏花素能拮抗硒所致过氧化、降低硒毒性；（4）0.5～2.5μmol/L富硒蚕蛹氨基酸显著性抑制肝癌细胞SMMC-7721生长、导致细胞凋亡和周期改变、诱导细胞产生活性氧，同浓度亚硒酸钠和硒代蛋氨酸对其抑制不显著；（5）富硒蚕蛹蛋白经分离纯化和鉴定后发现存在一新含硒蛋白，其结构和功能有待研究；（6）通过已有的含hTERT基因质粒，成功构建hTERT反义RNA表达质粒，转染SMMC-7721细胞后对其生长具有抑制作用。

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