高灵敏显色剂meso-四-(4-甲基,3-磺基苯)卟啉间接分光光度法测定微量硫化物

本文利用汞（Ⅱ）－ＴＴＰＳ４的显色反应间接分光光度法测定微量硫化物，灵敏度高，选择 性、稳定性均好．已应用本法测定了温泉水、工业废水中微量硫化物，结果满意．     

硫化镉纳米粒子的水相制备及光催化降解罗丹明B

以氯化镉为镉源,硫代氨基脲为硫源,在水相中通过沉淀法制备出硫化镉纳米颗粒,并对其进行表征.以光催化降解罗丹明B作为探针反应,评价其光催化降解活性.结果表明：该制备方法简单易行,所得纳米粒子具有良好的光催化活性.     

中国含硫化铜镍矿床的超基性岩成因

通过对我国含镍超基性岩矿物学、岩石学、常量元素、稀土元素、锶同位素、硫同位素等几方面成因证据的初步讨论,发现其成矿物质来源于地幔,含矿岩浆是上地幔局部熔融直接产生的,并且是地幔熔融程度较低的结果,其相对富集了钛、铝、钙、钠、钾、稀土、锶及成矿元素等元素。这种含矿岩浆或含镍建造与底辟过程及洋壳无关,而主要分布在稳定大陆地块活动边缘,极少数情况下沿深大断裂侵入到地块内部。硫化铜镍工业富集需要相对稳定的构造环境,构造长期活动,使得含矿岩浆能够上侵到地壳浅部并发生良好的结晶——重力分异作用和硫化物——硅酸盐熔离作用,并进而富集成矿。     

Effects of sulfur addition methods and Ca-Si treatment on the microstructure and properties of 30MnVS

The effects of sulfur addition methods and Ca-Si treatment on the microstructure and properties of free-cutting non-quenched and tempered steel 30MnVS were investigated by using optical microscopy, SEM and tensile test methods. The results show that sulfur addition methods influence the morphology of sulfides and the properties of 30MnVS slightly. Ca-Si treatment is beneficial for the formation of complex sulfides which normally have oxide cores, therefore, improving the distribution of sulfides in the tested steel and enhancing its toughness. The two methods, pyrite addition during LF process and S wire feeding during VD process, slightly influence the morphology and distribution of sulfides and the properties of 30MnVS; Ca addition not only promotes the nucleation of sulfides on the cores of calcium aluminate inclusions, but also creates modification effect on MnS, reducing the relative plasticity and hot deformability of sulfides during hot rolling process, thereby reducing the length/width value of sulfides and improving their distribution, and significantly enhancing its mechanical properties, in particular, the impact toughness increased by 30%.     

等离子体处理对碘掺杂PPS电导的影响

导电的PPS(聚对苯硫醚)的电导稳定性至今未得到解决,其根本原因是掺杂剂与PPS分子之间不能形成或不能永久形成电荷传递结合物。本文以不形成电荷传递结合物的掺杂剂碘(I)作为研究对象,在化学掺杂之后进行了等离子体处理,使PPT的电导率和稳定性大幅度提高,达到强掺杂剂的程度。红外吸收和二次离子质谱分析表明,经低温等离子体处理后,I和PPS之间形成(C_3 H_2S)~+和(HCIS)~+ 基团,电导的活化能从原始的2.0eV降低到0.2V,电导的机理是载流的热活化过程。     

Catalase in sulfide- and methane-dependent macrofauna from petroleum seeps

Vesicomyid and lucinid clams and tubeworms from Gulf of Mexico petroleum seeps, all of which bear symbiotic sulfide-oxidizing bacteria, have much lower catalase activities than shallow-water species lacking symbionts. A petroleum seep mussel bearing methane-oxidizing bacteria is unusual in having catalase activities as high as shallow-water bivalves. Unlike sulfide-dependent meiofauna from shallow-water marine sands, catalase from all petroleum seep species was inhibited by 3-amino-1,2,4-triazole.Acknowledgments. We thank S. McDonald and the crew of R/V Gyre for assistance in animal collection. This research was funded by NSF grant OCE-8219792 to EP and NSF grant OCE-83-01538 and funds from the Offshore Operators Committee to J. Brooks. We appreciate this support.     

高温高压下一些层状硫化物的合成

在４．０×１０９Ｐａ，１０２５℃条件下合成三硫化铌、二硫化钨和二硫化钼。高压合成是伴随扩散的动态过程，压力对反应动力学有较大影响，明显缩短了反应时间。高温高压合成的三硫化铌属单斜晶系，二硫化钨、二硫化钼属六方晶系。     

矿样中镍的二次强化浸出及X-射线衍射分析

采用焙烧、水浸实现了原生硫化镍钼矿中镍和钼的分离.对得到的矿渣进行二次强化浸出,考察得到的较优工艺条件为:酸浸后的矿样在固液比为1:6、浸出温度95℃、超声波振荡、浸出时间为4 h、硫酸浓度为15%和加入0.5 g添加剂条件下,镍渣中镍的二次强化浸出率为56.37%,总浸出率达到69.34%.并通过X射线衍射图谱,对矿样中镍的物相及走向进行了初步分析.     

硫化锌精矿无污染冶金新工艺研究──热压制团及其成型机理

开发新的制团工艺是实现硫化锌精矿直接还原蒸馏无污染冶金新工艺的关键技术之一．本文的研究结果表明，采用热压制团工艺以３８ＭＰａ的压力可制备出抗压强度达４３．５ＭＰａ的生团矿．热压制团工艺的最佳预热温度为４５０～５００℃，时间约５ｍｉｎ．最后，探讨了热压成型的机理．     

化学沉积法合成周期性大孔硫化铜

利用单分散的SiO2球构成的胶态晶体为模板，通过简单的化学沉积方法，在室温到160℃的比较温和的条件呀合成了三维周期性的大孔径CuS，同时研究构成其骨架的孔壁对热和超声的稳定性。