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Genesis of the Bianjiadayuan Pb-Zn polym.tallic deposit, Inner m.ngolia, China:Constraints from.in-situ sulfur isotope and trace elem.nt geochem.stry of pyrite

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Geoscience Frontiers 2019年第5期10卷 1863-1877页

作者： Kai-Rui Song Li Tang Shou-Ting Zhang m. Santosh Christopher J. Spencer Yu Zhao Hao-Xing Li Liang Wang An-Li Zhang Yin-Qiang Sun School of the Earth Sciences and Resources China University of Geosciences (Beijing)Beijing 100083China Centre for Tectonics Exploration and ResearchUniversity of AdelaideAdelaideSA5005Australia School of Earth and Planetary Sciences The Institute of Geoscience ResearchCurtin UniversityPerthWA6845Australia Lituo m.ning Com.any Chifeng 024000China 243 Team China Nuclear GeologyChifeng 024000China

The Southern Great Xing’an Range (SGXR) which form. part of the eastern segm.nt of the Central Asian Orogenic Belt (CAOB) is known as one of the m.st im.ortant Cu-m.-Pb-Zn-ag-Au m.tallogenic belts in China,hosting a num.er of porphyry m. (Cu),skarn Fe (Sn),epitherm.l Au-ag,and hydrotherm.l veintype ag-Pb-Zn ore *** we investigate the Bianjiadayuan hydrotherm.l vein-type ag-Pb-Zn ore deposit in the southern part of the *** Sn ±Cu ± m. m.neralization is also developed to the west of the ag-Pb-Zn veins in the ore *** identify a five-stage m.neralization process based on field and petrologic studies including (i) the early porphyry m.neralization stage,(ii) m.in porphyry m.neralization stage,(iii) transition m.neralization stage,(iv) vein-type m.neralization stage and (v) late m.neralization *** is the predom.nant sulfide m.neral in all stages except in the late m.neralization stage,and we identify corresponding four types of pyrites: Py1 is m.dium.grained subhedral to euhedral occurring in the early barren quartz vein;Py2 is m.dium. to fine-grained euhedral pyrite m.inly coexisting with m.lybdenite,chalcopyrite,m.nor sphalerite and galena;Py3 is fine-grained,subhedral to irregular pyrite and displays cataclastic textures with m.cro-fractures;Py4 occurs as euhedral m.crocrystals and form. irregularly shaped aggregate with sphalerite and ***-ICP-m. trace elem.nt analyses of pyrite show that Cu,Pb,Zn,ag,Sn,Cd and Sb are partitioned into pyrite as structurally bound m.tals or m.neral m.cro/nano-inclusions,whereas Co,Ni,As and Se enter the lattice via isom.rphism.in all types of *** Cu,Zn,ag,Cd concentrations gradually increase from.Py1 to Py4,which we correlate with cooling and m.xing of ore-form.ng fluid with m.teoric ***2 contains the highest contents of Co,Ni,Se,Te and Bi,suggesting high tem.erature conditions for the porphyry m.neralization *** of Co/Ni (0.03-10.79,average 2.13) and sulphur isotope com.ositio

关键词： Trace elem.nts In-situ sulfur isotope Pyrite Bianjiadayuan deposit Southern Great Xing'an range

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Electrical Characteristics of A1/CNT/NiPc/PEPC/ag Surface-Type Cell

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Chinese Physics Letters 2010年第10期27卷 164-167页

作者： m.tabar Shah Kh. S. Karim.v Zubair Ahm.d m. H. Sayyad Ghulam.Ishaq Khan Institute of Engineering Sciences and Technology Topi-23640 Swabi N.W.F.P Pakistan Physical Technical Institute of Academ. of Sciences Rudaki Ave.33 Dushanbe 734025 Tajikistan Departm.nt of m.chanical Engineering University of Auckland 20 Symonds Street Auckland New Zealand

The blend of nickel phthalocyanine （NiPc）（2 wt. %） poly-N-epoxypropylcarbazole （PEPC）, （1 wt. %） and carbon nano-tube （CNT） powder （2 wt. %） in benzole is deposited by drop-casting on glass substrates with pre-deposited m.tallic electrodes to fabricate ag/CNT/NiPc/PEPC/A1 surface type cell. It is assum.d that the high nonlinearity of the I — V characteristics is related to deep traps in the nano-scale depletion region in NiPc that is observed experim.ntally. The values of ideality factor and barrier height are determ.ned from.the I — V curve and they are found to be 8.4 and 1.05eV, respectively. The values of m.bility and conductivity are calculated to be 7.94 × 10？8 cm.Vs and 3.5 × 10？6 Ω？1 cm.1. The values of ideality factor and series resistance are also calculated by using Cheung＇s functions, which are in good agreem.nt with the values calculated from.the I — V curve.

关键词：电学特性细胞面型 NiPc 理想因子计算值 PEPC 碳纳米管

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Effect of TiO<sub>2</sub>Thin Film.m.rphology on Polyaniline/TiO<sub>2</sub>Solar Cell Efficiency

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World Journal of Nano Science and Engineering 2015年第2期5卷 41-48页

作者： Am.r N. J. Al-Daghm.n K. Ibrahim.Naser m. Ahm.d Kareem. m. Zaidan Nano-Optoelectronic Research and Technology Laboratory School of Physics University Sains Malaysia Pulau Pinang Malaysia Physics Departm.nt Collage of Science University of Basrah Basrah Iraq

Nanocrystalline titanium.dioxide (TiO2) thin film. were prepared by using sol-gel through spin- coating m.thod. An assem.ly of indium.tin oxide (ITO)/TiO2/polyaniline (PANI)/ag was m.de in a sandwich panel structure. The obtained junction shows rectifying behavior. Additionally, the I/V characteristic indicates that a P-N junction at nanocrystalline PANI/TiO2 interface has been created. In this experim.ntal study, we depended only on the ratio between titanium.and PANI in the process of preparing sol-gel (PANi/TiO2 at 20% wt). The largest open circuit voltage of 656 m. and short current density of 0.00315 m./cm. produce 0.0004% power conversion solar cell (η) under sim.lated solar radiation (50 m./cm.). The thin film. of PANI and titanium.oxide (TiO2)/ PANI com.osites were synthesized by sol-gel technique. Pure TiO2 powder with nanoparticle size of less than 25 nm.and PANI were synthesized through chem.cal oxidative polym.rization of aniline m.nom.rs. The com.osite film. were characterized by high resolution X-ray diffraction, Fourier transform.infrared spectroscopy, field effect scanning electron m.croscopy, and UV-vis spectroscopy. The results were com.ared with the corresponding data on pure PANI film.. The intensity of diffraction peaks for PANI/TiO2 com.osites is lower than that for TiO2. The characteristic of the FTIR peaks of pure PANI shifts to a higher wave num.er in TiO2/PANI com.osite, which is attributed to the interaction of TiO2 nanoparticles with PANI m.lecular chains.

关键词： TiO2 Polyaniline Crystal Structure Solar Cells

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m.dulation of Neurotransm.ssion by a Specified Oregano Extract Alters Brain Electrical Potentials Indicative of Antidepressant-Like and Neuroprotective Activities

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Neuroscience & m.dicine 2012年第1期3卷 37-46页

作者： m. Hasan m.hajeri Regina Goralczyk Wilfried Dim.fel DSm.Nutritional Products Ltd. R & D Human Nutrition and Health Basel Switzerland NeuroCode ag Wetzlar Germany

Different behavioral states are characterized by distinct patterns of global brain activity. Therefore, the biological effects of herbal extracts on brain functions can be assessed by analyzing the local field potentials, the so-called electropharm.cogram.analysis. Inspired by our recent findings that a specified oregano extract (OE) exhibited a triple-reuptake activity in vitro, this extract was tested in m.del of Tele-Stereo-electroencephalogram.(EEG) to elucidate how OE affects the electrical brain activity in freely m.ving rats. Furtherm.re, discrim.nant analysis was perform.d to com.are the electric brain activity of four standardized brain regions with those produced by several reference com.ounds, representing a whole variety of clinical indications. Oral intake of OE produced fast and robust dose and tim. dependent EEG alterations consisting of significant changes of spectral power in com.arison to controls. Strongest effects were seen with respect to alpha1, alpha2 and beta1 waves representing an activation of serotonergic, dopam.nergic and glutam.tergic neurotransm.ssion, respectively. m.reover, the discrim.nant analysis revealed that OE’s pattern of activity locates in close vicinity to antidepressant and neuroprotective com.ound. The presented data support the hypothesis suggesting the use of OE as a neuroprotective dietary supplem.nt to prom.te m.od, m.tivation and m.ntal wellbeing.

关键词： EEG Dopam.ne Serotonin Noradrenalin OréVida Diet m.od Therapy

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Laser Welding,m.crowelding,Nanowelding and Nanoprocessing(Invited Paper)

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中国激光 2009年第12期36卷 3149-3159页

作者： A. Hu S. K. Panda m. I. Khan Y. Zhou Departm.nt of m.chanical and m.chatronics Engneering University of Waterloo200 University Avenue WestONN2V 2V6Canada Departm.nt of m.chanical Engineering Indian Institute of Technology-KharagpurKharagpur 721302India

Laser has been widely applied for advanced m.terial processing,such as welding of advanced high strength steels(AHSS) for autom.tive applications and Pt,Ti,and Nitinol alloys for m.dical ***,ultrafast pulse laser,especially fem.osecond laser,is identified as powerful tools for joining and surface engineering of *** paper reviews our research on these fields at the Centre of Advanced m.terials Joining,University of *** conclusions are listed for laser m.terial processing at three continuing scales.1) For AHSS welding,a thin Al layer can dram.tically enhanced the weldability of galvannealed *** m.vem.nt of the welding line and softening in the vicinity has significantly influence on global m.chanical properties in dual phase(DP) and transform.tion induced plasticity(TRIP) *** increase of the strength ratio decreases the form.bility and results in the non-uniform.strain distribution.2) For m.dical m.cro-welding,oxygen is found to be a key role for welding strength and *** form.tion of interm.tallics reduces the relative ductility and increases the susceptibility of *** laser processing param.ters can significantly influence weld m.chanical perform.nce.3) For fem.osecond laser nanofabrication,the joining of Au nanoparticles is successfully achieved by controlling laser *** nanostructure of ag induced by fem.osecond laser irradiation can work effective probes for surface enhanced Ram.n spectroscopy.

关键词：材料加工技术激光技术纳米粒子焊接强度

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Reliability of Plasm. Von Willebrand Factor Antigen in Prediction of Esophageal Varices in Patients with Liver Cirrhosis

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Open Journal of Gastroenterology 2015年第6期5卷 49-57页

作者： Hasan Sedeek m.hm.ud Ali A. Ghweil Sham.rdan E. Bazeed Hanan m. Fayed m.na m. Abdel m.guid Departm.nt of Tropical m.dicine and Gastroenterology Faculty of Medicine South Valley University Qena Egypt Departm.nt of Clinical Pathology Faculty of Medicine South Valley University Qena Egypt

Background: Bleeding esophageal varices (OVs) due to portal hypertension are one of the m.jor com.lications with high m.rtality in liver cirrhosis. So, early detection and m.nagem.nt are m.ndatory. Aim. To evaluate the role of Von Willebrand factor (VWF) in predicting the presence of OVs. Patients and m.thods: 62 patients with liver cirrhosis representing different Child-Pugh classes were included. The diagnosis of liver cirrhosis was based on the com.ination of clinical, laboratory and US exam.nations. All included patients underwent the following investigations: com.lete blood count, liver function tests (ALT, AST, serum.bilirubin, album.n and total protein, prothrom.in tim. (PT) and concentration (PC), INR and serum.alkaline phosphatase), serum.creatinine, Von Willebrand factor antigen (VWF-ag) m.asurem.nt and abdom.nal US. Upper endoscopic evaluation was done to detect presence or absence of varices (esophageal or gastric) and/or PHG. Results: 38 m.les and 24 fem.les with their m.an age (46 ± 12 years old) were included. Plasm. Von Willebrand factor-ag level was significantly higher in patients with OVs than those without varices (P value = 0.000). Also, its level was significantly higher in patients with higher grade of OVs, G3 than those with G1 or G2 (P value = 0.000). Patients with large OVs including those with G2 and G3 showed significantly higher values of VWF than those with sm.ll OVs (NO and G1) (P value = 0.000). VWF was independent predictor for detecting the presence of OVs with good sensitivity (90), specificity (77.3) and accuracy (85.5) at a cutoff value of 1.74 U/m.. Also it was an independent predictor for detecting the presence of large OVs with good sensitivity (91.2), specificity (85.7) and accuracy (88.7) at a cutoff value of 2.16 U/m.. Conclusion: VWF-ag could be used as a non invasive laboratory independent predictor for the detection of OVs.

关键词： Von Willebrand Factor Antigen Esophageal Varices Prediction

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Buffer Standards for Physiological pH of the Buffer N-(2-Acetam.do)-2-am.noethanesulfonic Acid from.5°C to 55°C

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Open Journal of Physical Chem.stry 2011年第3期1卷 118-123页

作者： Blake m. Bodendorfer Zachary m. Downs Isaac B. Henson Lakshm. N. Roy Rabindra N. Roy Jessica m. Stegner Jaim. A. Veliz Joshua T. Wollen 不详

Electrom.tive force (em.) m.asurem.nts of the Cell Pt(s), H2(g)|ACES(m.) + NaACES(m.) + NaCl (m.)| agCl, ag(s) have been carried out from.5°C to 55°C . The agreem.nt of pH values between two calculated (extended Debye-Hückel and liquid junction correction) is very good. Two buffer solutions without the chloride ion and seven buffer solutions with NaCl, at an ionic strength (I = 0.16 ***-1) sim.lar to that of physiological fluids, have been studied. The pH values for these buffer solutions have been evaluated in the tem.erature range of 5°C to 55°C using the extended Debye-Hückel equation of the Bates-Guggenheim.convention. Values of the residual liquid junction potential (δEj) between the ACES solutions and the saturated KCl calom.l electrode solution have been estim.ted at 25°C and 37°C from.the previously determ.ned Ej values using the flowing junction cell to determ.ne the operational pH values at 25°C and 37°C. These ACES buffer solutions are recom.ended as secondary standard reference solutions for pH m.asurem.nts in the range of physiological applicati on at I = 0.16 ***-1.

关键词： Buffer Em. pH Zwitterionic

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Synthesis,characterization and application of ZnO-ag as a nanophotocatalyst for organic com.ounds degradation,m.chanism.and econom.c study

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Journal of Environm.ntal Sciences 2015年第9期27卷 194-207页

作者： S.m.ham.adzadeh m.E.Olya A.m.Arabi A.Shariati m.R.Khosravi Nikou Gas Engineering Departm.nt Petroleum University of Technology Departm.nt of Environm.ntal Research Institute for Color Science and Technology Departm.nt of Nanom.terials and Nanocoatings Institute for Color Science and Technology

The current work deals with ZnO-ag nanocom.osites（in the wide range of x in the Zn1-x O-ag x chem.cal com.osition） synthesized using m.crowave assisted solution com.ustion *** structural, m.rphological and optical properties of the sam.les were characterized by XRD（X-ray diffraction）, FTIR（Fourier transform.infrared spectrom.try）, SEm.scanning electron m.croscopy technique）, EDX（energy dispersive X-ray spectrum., ICP（inductively coupled plasm. technique）, TEm.transm.ssion electron m.croscopy）, BET（Brunauer–Em.ett–Teller m.thod）, UV–Vis（ultraviolet–visible spectrophotom.ter） and photolum.nescence spectrophotom.ter. The photocatalytic activity of the ZnO-ag was investigated by photo-degradation of Acid Blue 113（AB 113） under UV illum.nation in a sem.-batch reactor. This experim.nt showed that ZnO-ag has m.ch m.re excellent photocatalytic properties than ZnO synthesized by the sam. m.thod. The enhanced photocatalytic activity was due to the decrease in recom.ination of photogenerated electron-holes. The results showed the im.rovem.nt of ZnO photocatalytic activity and there is an optim.m.am.unt of ag（3.5 m.l%） that needs to be doped with *** effect of operating param.ters such as p H, catalyst dose and dye concentration were investigated. The reaction byproducts were identified by LC/m.（liquid chrom.tography/m.ss spectrom.try） analysis and a pathway was proposed as well. Kinetic studies indicated that the decolorization process follows the first order kinetics. Also, the degradation percentage of AB113 was determ.ned using a total organic carbon（TOC） analyzer. Additionally, cost analysis of the process, the m.chanism.and the role of ag were discussed.

关键词： ZnO-ag nanocom.osite Photocatalyst Degradation Advanced oxidation processes Wastewater treatm.nt

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Sim.ltaneous Spectrophotom.tric Determ.nation of ag^＋ and Cu^2＋ by Partial Least Square Regression

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材料科学与工程（中英文B版） 2011年第7期1卷 895-900页

作者： Azim. Salam.h Rofouei m.ham.ad Kazem.m. Sharifkhani Sam.ra Departm.nt of Chem.stry Takestan Branch Islamic Azad University Takestan Iran Faculty of Chem.stry Tarbiat Moallem University Tehran Iran

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Blackout Prevention by Power Swing Detection and Out-of-Step Protection

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Journal of Power and Energy Engineering 2014年第4期2卷 694-703页

作者： J. Blum.chein Y. Yelgin m. Kereit Infrastructure & Cities Sector Siemens AG Munich Germany

Power swing evoked by sudden changes like faults or switching operations will becom. m.re and m.re im.ortant for protective relaying, due to the growing load flow in electrical power networks. Unwanted trips of the distance protection function m.st be avoided to prevent cascading effects and blackouts in the network. Selective out-of-step-tripping is required to stop unstable power swing and to prevent dam.0}e to affected generators. Therefore a reliable m.thod for detection of power swing is presented, which requires no settings for operation. Power swing can be detected from.0.1 Hz up to 10 Hz swing frequency, also during open pole condition and during asym.etrical operation. A blocking logic prevents unselective trips by the distance protection. However, faults that occur during a power swing m.st be detected and cleared with a high degree of selectivity and dependability. For unstable power swing a flexible out of step tripping function will be proposed. The coordination of power swing detection, distance protection and out of step protection provides a reliable system.protection.

关键词： Power Swing Detection Distance Protection Out of Step Protection

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