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Use of.f.rricyanide f.r gold and silver cyanidation

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中国有色金属学会会刊：英文版 2009年第3期19卷 714-718页

作者： f. XIE D. B. D REISINGer Department of.Materials Engineering University of British Columbia

Low gold and silver leaching kinetics has been commonly observed in traditional gold-silver cyanidation process, especially in heap leaching and in situ leaching operations. The dif.erent mineralogy of.gold and silver in the ores is suspected to be the main reason, e.g., the occurrence of.low solubility acanthite (Ag2S) typically results in low overall silver extraction. Due to the low solubility of.oxygen in cyanide solution, the reactivity and availability of.oxidant is believed to be the critical limitation f.r gold and silver dissolution. The use of.f.rricyanide as the auxiliary oxidant f.r gold and silver cyanidation has been examined. The rotating disc test results prove the assistant ef.ect of.f.rricyanide on increasing the dissolution rate of.gold and silver. The potential use of.f.rricyanide in gold/silver cyanidation process is proposed based on the leaching results of.actual ores.

关键词：氰化工艺金银浸出动力学铁助氧化剂氰化物溶液旋转圆盘溶解度

Current taxane f.rmulations and emerging cabazitaxel delivery systems

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Nano Research 2018年第10期11卷 5193-5218页

作者： Boyang Sun Robert M. Straubinger Jonathan f. Lovell Department of.Biomedical Engineering University at Buffalo State University of New York Buffalo NY 14260 USA Department of.Chemical and Biological Engineering University at Buffalo State University of New York Buffalo NY 14260 USA Department of.Pharmaceutical Sciences University at Buffalo State University of New York Buffalo NY 14214 USA

Cabazitaxel is a second-generation taxane with promising anti-tumor activity and is approved f.r treating hormone-ref.actory metastatic prostate cancer previously treated with docetaxel. Although f.rst-generation taxanes （i.e. paclitaxel and docetaxel） have sparked broad interest in a variety of.drug delivery vehicles, f.wer have yet been developed f.r cabazitaxel. This review summarizes several clinical-stage approaches f.r taxane f.rmulation and recent ef.orts to develop novel cabazitaxel delivery systems.

关键词： cabazitaxel Jevtana taxanes drug delivery systems nanocarriers

THE STUDY Of.AIRPORTTerRAIN Ef.ECTS ON AUTOLAND f.R ANY AIRPLANE

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航空学报 1993年第12期 596-602页

作者： Sai f. Lee No 804 Perry Arc. Montebello Ca 90640 Dr

The terrain prof.le at several airports has caused some dif.iculty with autolands on the DC-10 and MD-80. Some operators have reported that the pilot had to disconnect the f.ight guidance system during f.are and land manually. At present, the autoland guidance system is not uniquely designed to handle the variations of.terrain. Since there is no accurate substitute f.r radio altitude(h) the only variable lef. to improve is radio altitude rate (h).

关键词： THE STUDY Of.AIRPORTTerRAIN Ef.ECTS ON AUTOLAND f.R ANY AIRPLANE Case rate high 丰剑

Ef.ects of.Strain Rate and Def.rmation Temperature on Microstructures and Hardness in Plastically Def.rmed Pure Aluminum

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Journal of.Materials Science & Technology 2011年第1期27卷 1-7页

作者： f. Huang N.R. Taot K. Lu Shenyang National Laboratory f.r Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China

The microstructures and hardness of.pure Al samples subjected to plastic def.rmation with dif.erent tem- peratures and strain rates were investigated. The results showed that the strain-induced grain ref.nement is signif.cantly benef.ted by increasing strain rate and reducing def.rmation temperature. The saturated size of.ref.ned subgrains in Al can be as small as about 240 nm in cryogenic dynamic plastic def.rmation （DPD）. Grain boundaries of.the DPD Al samples are low-angle boundaries due to suppression of.dynamic recovery during def.rmation. Agreement of.the measured hardness with the empirical Hall-Petch relation extrapolated f.om the coarse-grained Al implies that the low-angle boundaries can contribute to strengthening as ef.ective as the conventional grain boundaries.

关键词： Dynamic plastic def.rmation Microstructure Hardness Strain rate Temperature

Recovery of.rare and precious metals f.om urban mines —— A review

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f.ontiers of.Environmental Science & Engineering 2017年第5期11卷 3-19页

作者： Mengmeng Wang Quanyin Tan Joseph f. Chiang Jinhui Li Key Laboratory f.r Solid Waste Management and Environment Saf.ty (Tsinghua University) Ministry of Education of China School of Environment Tsinghua University Beijing 100084 China Department of.Chemistry and Biochemistry State University of New York College at Oneonta Oneonta NY 13820 USA

Urban mining is essential f.r continued natural resource extraction. The recovery of.rare and precious metals （RPMs） f.om urban mines has attracted increasing attention f.om both academic and industrial sectors, because of.the broad application and high price of.RPMs, and their low content in natural ores. This study summarizes the distribution characteristics of.various RPMs in urban mines, and the advantages and shortcomings of.various technologies f.r RPM recovery f.om urban mines, including both conventional （pyrometallurgical, hydrometallurgical, and biometallurgical processing）, and emerging （electrochemical, supereritieal f.uid, mechanochemical, and ionic liquids processing） technologies. Mechanical/physical technologies are commonly employed to separate RPMs f.om nonmetallic components in a pre-treatment process. A pyrometallurgical process is of.en used tbr RPM recovery, although the expensive equipment required has limited its use in small and medium-sized enterprises. Hydrometallurgical processing is ef.ective and easy to operate, with high selectivity of.target metals and high recovery ef.iciency of.RPMs, compared to pyrometallurgy. Biometallurgy, though, has shown the most promise f.r leaching RPMs f.om urban mines, because of.its low cost and environmental f.iendliness. Newly developed technologies electrochemical, supercritical f.uid, ionic liquid, and mechanochemical have of.ered new choices and achieved some success in laboratory experiments, especially as ef.icient and environmentally f.iendly methods of.recycling RPMs. With continuing advances in science and technology, more technologies will no doubt be developed in this f.eld, and be able to contribute to the sustainability of.RPM mining.

关键词： Rare and precious metals (RPMs) Distribution characteristics Recycling technology Emerging technology Supercritical f.uid

Making a Mechanical Organism Being the f.urth in a series of.essays on the materials of.nature

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Journal of.Bionic Engineering 2006年第1期3卷 43-58页

作者： Julian f. V. Vincent Department of.Mechanical Engineering The University of Bath Bath BA2 7AY UK

Most multicellular organisms can be categorised by two words： hierarchy and composite. The underlying f.actal geometry of.nature - at least in terms of.provision of.inf.astructure - provides much of.the hierarchy, although many materials f.r which inf.astructure is not an integral f.ctor are also strongly hierarchical. Plants can theref.re be modelled using recursive computer programs which add structures as the size increases. However, problems with mechanical stability also increase as the structure grows, so the plant changes f.om deriving stif.ness f.om intevaal pressure to cross-linking the cell wall components permanently. However, this compromises the ability of.the plant to grow and repair itself.

关键词： Making a Mechanical Organism Being the f.urth in a series of.essays on the materials of.nature

f.nctionalization of.AuMSS nanorods towards more ef.ective cancer therapies

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Nano Research 2019年第4期12卷 719-732页

作者： Carolina f. Rodrigues Telma A. Jacinto Andre f. Moreira Elisabete C. Costa Sonia P. Miguel Ilidio J. Correia CICS-UBI -Centro de Investigagao em Ciencias da Saude Universidade da Beira Interior Covilhd 6200-506 Portugal CIEPQf.- Departamento de Engenharia Quimica Universidade de Coimbra Rua 13 Silvio Lima Coimbra 3030-790 Portugal

The applicatio n of.nano particles as selective drug delivery platf.rms arises as one the most promising therapeutic strategies in the biomedical f.eld. Such systems can encapsulate drugs, prevent its premature degradation, transport and promote the drugs specif.c delivery to the target site. Among the dif.erent nanostructures, gold-core mesoporous silica shell (AuMSS) nanorods have been one of.the most explored due to their unique physical and chemical properties. The mesoporous silica biocompatibility, high surf.ce area that can be easily f.nctionalized, tubular pores that can store the drugs, conjugated with the intrinsic capacity of.gold nanorod to absorb near-inf.ared radiation, allows the combination of.hyperthermia (i.e., photothermal ef.ect) with drug delivery, making them a nanoplatf.rms with a huge potential f.r cancer therapy. Nevertheless, the successf.l applicati on of.AuMSS nanoparticles as an ef.ective can cer nano medicine is hindered by the uncon trolled release of.the therapeutic payloads, limited blood circulation time and unf.vorable pharmacokinetics. In this review, an overview of.the modif.cati ons perf.rmed to improve the AuMSS nano rods applicati on in nanom edicine is provided, highlighting the practical approaches that enhaneed the AuMSS nanorods targeting, responsiveness to dif.erent stimuli, and blood circulation time. f.rther, the basics of.AuMSS nano rods syn thesis procedures, gen eral properties, and its applicati on in can cer therapy are also described.

关键词： gold nano rods silica surf.ce modif.cations targeting cancer

The new emerging H7N9 inf.uenza virus indicates poultry as new mixing vessels

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Science China(Lif. Sciences) 2014年第7期57卷 731-732页

作者： LIU Di GAO George f. Key Laboratory of.Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences Network Inf.rmation Center Institute of MicrobiologyChinese Academy of Sciences Beijing Institutes of.Lif. Science Chinese Academy of Sciences Of.ice of.Director-General Chinese Center for Disease Control and Prevention

Since 30 March 2013,the Chinese Center f.r Disease Control and Prevention(China CDC)has reported the f.rst laboratory-conf.rmed cases of.inf.uenza A H7N9 virus human *** new pathogen caused 144 human inf.ctions with 47 f.tal cases in year 2013,and continued to bring another wave in 2014,caused another 273 inf.ctions with 108deaths as of.27th *** H7N9 inf.uenza virus has again raised the global concerns of.the potential *** of.the origin and evolution of.this virus revealed that the novel H7N9 inf.uenza virus was reassorted f.om H7,N9and H9N2 subtypes of.inf.uenza viruses f.om domestic ducks,wild waterf.wls and poultry,respectively;and the processes of.genetic reassortments were sequential and dynamic[1?3].

关键词：甲型流感病毒中国疾病预防控制中心混合容器家禽 H9N2亚型人类感染全球性问题野生水禽

Millennial-scale paleoceanography in Okinawa Trough during Late Quaternary period

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Chinese Science Bulletin 1999年第18期44卷 1705-1709页

作者： f. Guichard G. f.och Centre des f.ibles Radioactivites FranceFrench Oceanographic Institute IFREMER France

Based on the analyses of.f.raminif.r and accelerator mass spectrometer radiocarbon dating in DGKS9603 core f.om mid-Okinawa Trough close to bottom, oscillation curve, which expressed the relation between the surf.ce water temperature and the depth, has been obtained by using f.raminif.r analysis and calculation of.f.-12E transf.r f.nction. The whole core indicated seven cold phases and eight warm phases. Obvious expression of.low

关键词： Okinawa Though Late Quaternary period paleoceanograph Heinrich Event.