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green Energy & Environment 2016年第2期1卷 172-177页

作者： g.Sibi Department of Biotechnology Indian Academy Degree College Centre for Research and Post Graduate Studies

Hexavalent chromium [Cr(Ⅵ)] is a toxic oxidized form and an important metal pollutant in the water bodies. Biosorption of chromium(VI)offers a potential alternative to conventional metal removal methods. Dried biomass of Chlorella vulgaris was used as biosorbent for the removal of Cr(VI) from electroplating and galvanizing industry effluents as a function of biosorbent dosage, contact time, pH, salinity and initial metal ion concentration. Batch experiments were conducted for biosorption and the optimum conditions were 1 g/L biomass, 4 h contact time, pH 2 and 2.893 mS/cm of electrical conductivity. The chromium biosorption was strictly pH dependent with a maximum Cr removal of 63.2 mg/L at pH 2. Highest Cr removal at a concentration of 81.3 mg/L was observed at Electrical conductivity(EC) value of 2.893 mS/cm. A comparison of Langmuir and Freundlich isotherm models revealed that Freundlich isotherm model fitted the experimental data based on R^2, q_(max) and standard error values. The results suggest that C. vulgaris biomass could be considered a promising low-cost biosorbent for the removal of Cr(VI) from electroplating and galvanizing industry effluents.

关键词： Biosorption Chlorella vulgaris Microalgae Hexavalent chromium

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The seismite problem

Journal of Palaeogeography 2016年第4期5卷 318-362页

作者： g.Shanmugam Department of Earth and Environmental Sciences The University of Texas at Arlington

During a period of 82 years （1931-2013）, 39 genetic terms were introduced for various deposits. Of the 39 terms, only ten are meaningful in understandin8 the true depositional origin （e.9., turbidites）, the remaining 29 are just jargons （e.g., seismites, tsunamites, etc.）. The genetic term ＂seismites＂, introduced by Seitacher （1969） for recognizing pa[aeoearthquakes in the sedimentary record, is a misnomer. The term was introduced in haste, based on an examination of a single exposure of the Miocene Monterey Formation （10 m） in California, without a rigorous scientific analysis. The fundamental problem is that earthquake is a triggering mechanism, not a depositional process. Type of triggers cannot be recognized in the ancient sedimentary record because evidence for triggers is not preserved by nature. Soft-sediment deformation structures （SSDS）, commonly used as the criteria for interpreting seismites, are a product of liquefaction. However, liquefaction can be induced by any one of 21 triggers, which include earthquakes, meteorite impacts, tsunamis, sediment loading, among others. Brecciated ciasts, typically associated with earthquake-induced deposits in the Dead Sea Basin, are also common depositional products of debris flows （i.e., synsedimentary product unrelated to earthquakes）. Also, various types of SSDS, such as duplex-like structures and ctastic injections, can be explained by synsedimentary processes unrelated to earthquakes. Case studies of sandstone petroleum res- ervoirs worldwide, which include gulf of Mexico, North Sea, Norwegian Sea, Nigeria, Equatorial guinea, gabon, and Bay of Bengal, reveal that there is compelling empirical evidence for sediment loading being the primary cause of SSDS. The Krishna-godavari Basin, located on the eastern continental margin of India, is ideal for sediment failures by multiple triggering mechanisms where overpressure and liquefaction have ted to multi-origin SSDS. Because tsunamis and meteorite impacts are importan

关键词： Soft-sediment deformation structures (SSDS) Seismites Earthquakes Meteorite impacts Liquefaction Clastic injections

3D palaeogeographic reconstructions of the Phanerozoic versus sea-level and Sr-ratio variations:Discussion

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Journal of Palaeogeography 2015年第3期4卷 234-243页

作者： g.Shanmugam Department of Earth and Environmental Sciences The University of Texas at Arlington

Verard et el. （2015, Journal of Palaeogeography, 4（1 ）： 64-84） claim that their global geodynamic model allows one to reconstruct the surface features of topography on rand and in adjacent oceans （i.e., pateobathymetry） anywhere on the gtobe and at any geological time during the past 600 miltion years （Ma）. Such a grand model requires a rigorous scrutiny. The purpose of this discussion is to illustrate that the modet suffers from （1） the selective omission of real-world datasets that do not fit the model, （2） the inclusion of datasets without revealing their original sources or without citing relevant peer-reviewed publications, （3） the emphasis on ＇unpublished＇ internal company datasets that disallow open access to the international scientific community, and （4） the use of poorly understood concepts without providing the basic conceptual clarity. These deficiencies undermine the credibility of the heuristic modet.

关键词： submarine fans mass-transport deposits submarine canyons sea-Lever chanees gtacial isostasy Sr-ratio curve tectonics pateobathymetry

ON THE NUMERICAL SOLUTION OF QUASILINEAR WAVE EQUATION WITH STRONg DISSIPATIVE TERM

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Applied Mathematics and Mechanics(English Edition) 2004年第7期25卷 806-811页

作者： Aytekin gülle Department of Mathematics

The numerical solution for a type of quasilinear wave equation is *** three-level difference scheme for quasi-linear waver equation with strong dissipative term is constructed and the convergence is *** error of the d... 详细信息

关键词： periodical problem quasilinear wave equation difference scheme numerical solution

Measurement of J/ψ leptonic width with the KEDR detector

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Chinese Physics C 2010年第6期34卷 836-841页

作者： A.g.Shamov Budker Institute of Nuclear Physics

We report a new precise determination of the leptonic widths of the J/psi meson performed with the KEDR detector at the VEPP-4M e^＋e^- collider. The measured values of the J/psi parameters are： Гee×Гee/P = 0.3323±0.0064 （stat.）±0.0048 （syst.） keV,Гee×Гμμ/Г = 0.3318±0.0052 （stat.） ±0.0063 （syst.） keY. Assuming eμ universality and using the table value of the branching ratios the leptonic Г11 = 5.59 ± 0.12 keV width and the total Г = 94.1±2.7 keV widths were obtained. We also discuss in detail a method to calculate radiative corrections at a narrow resonance.

关键词： J/ψ meson lepton width full width

Electrical Characteristics of Co/n-Si Schottky Barrier Diodes Using I -- V and C -- V Measurements

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Chinese Physics Letters 2009年第6期26卷 254-257页

作者： g. güler OE. güllü S. Karatas OE. F. Bakkaloglu Department of Physics Faculty of Education University of Adiyaman 02100 Adiyaman Tarkey Department of Physics Faculty of Sciences and Arts University of Barman 72060 Barman Turkey Department of Physics Faculty of Sciences and Arts University of Kahramanmaras Sütcü imam 46100 Kahramanmaras Turkey Department of Engineering Physics Faculty of Engineering Physics University of Gaziantep 27310 Gaziantep Turkey

Electrical characteristics of Co/n-Si Schottky barrier diodes are analysed by current- voltage （I- V） and capacitancevoltage （C- V） techniques at room temperature. The electronic parameters such as ideality factor, barrier height and average series resistance are determined. The barrier height 0. 76 eV obtained from the C - V measurements is higher than that of the value 0. 70 eV obtained from the I - V measurements. The series resistance Rs and the ideality factor n are determined from the d ln（ I） /dV plot and are found to be 193.62 Ω and 1.34, respectively. The barrier height and the Rs value are calculated from the H（I） - I plot and are found to be 0.71 eV and 205.95Ω. Furthermore, the energy distribution of the interface state density is determined from the forward bias I - V characteristics by taking into account the bias dependence of the effective barrier height. The interface state density Nss ranges from 6.484×10^11 cm^-2eV^-1 in （Ec - 0.446） eV to 2.801×10^10 cm^-2eV^-1 in （Ec - 0.631） eV, of the Co/n-Si Schottky barrier diode. The results show the presence of a thin interracial layer between the metal and the semiconductor.

关键词： No English Keywords

SIMULATION OF 3-D DEFORMATION AND MATERIAL FLOW DURINg ROLL FORgINg PROCESS USINg SYSTEM OF OVAL-ROUND gROOVE

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Acta Metallurgica Sinica(English Letters) 2007年第5期20卷 380-384页

作者： g.H. Liu g.S. Ren C.g. Xu Beijing Research Institute of Mechanical ＆ Electrical Technology Beijing 100083 China Huazhong University of Science and Technology Wuhan 430074 China

Basing on the analysis of the traits of the roll forging process, a system-model of computer simulation has been established. Three-dimensional rigid-plastic FEM has been used for the simulation of the deformation process in the oval and round pass rolling, including the entering, rolling, and separating stages. The analysis was conducted using the Deform-3D ver.5.0 code. The important information concerned with the deformation area characteristic, material flow, and velocity field has been presented. Otherwise, the location of the neutral plane in the deformation area was shown clearly.

关键词： numerical simulation 3-D deformation roll forging

On Room-Temperature Inversion of EPR Signals of P1 Centre in Synthetic Diamond

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Chinese Physics Letters 2009年第1期26卷 317-320页

作者： g. g. Fedoruk O. N. Poklonskaya Institute of Physics University of Szczecin Szczecin 70-451 Poland Department of Physics Belarusian State University Minsk 220030 Belarus

Room-temperature inversion of EPR absorption signals of P1 centre in synthetic diamond is studied by the transient nutation technique. Use of the bichromatic field, consisting of a transverse microwave field and longitudinal radio frequency field, allows to investigate the dynamics of P1 centres in the same field configuration as in cw EPR spectrometers. It is shown that the annealing decreases the P1 centre concentration and, respectively, increases the spin-spin relaxation time. As a result, the periodic inversion （nutation） of the P1 centre absorption signal is observed longer. It is assumed that the P1 centre signal inversion, which was previously observed by cw EPR, might be caused by the Bloch-Siegert effect in the bichromatic field.

关键词： field emission molybdenum dioxide enhancement factor

Thrombospondin-1 expression correlates with angiogenesis in experimental cirrhosis

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World Journal of gastroenterology 2008年第14期14卷 2213-2217页

作者： gülsüm zlem Elpek güzide Ayse gkhan Sevgi Bozova Akdeniz University Medical School Department of Pathology Antalya 07070 Turkey

AIM:To investigate the significance of Thrombospondin-1 (TSP-1) expression and its relationship with angiogenesis during experimental fibrosis. METHODS:Cirrhosis was induced in male Wistar rats by intraperitoneal administration of diethyl nitrosamine (DEN). The serial sections from liver tissues were stained with anti-CD34 and anti-TSP-1 antibodies before being quantitated by light microscopy. RESULTS:Our results showed that of TSP-1 expression gradually increases according to the severity of fibrosis (groupⅠvs group Ⅱ, group Ⅲ and group Ⅳ;group Ⅱ vs group Ⅲ and group Ⅳ;group Ⅲ vs group Ⅳ, P giogenesis (P giogenesis provided by this study suggests that besides its role as a strong promoter of transforming growth factor-β1 (TgF-β1), TSP-1 might have an additional role in liver fibrogenesis by stimulating angiogenesis and this protein could be a potential target to prevent fibrogenesis in chronic inflammatory diseases of the liver.

关键词： Experimental liver cirrhosis Immuno-histochemistry Liver fibrosis Pathologic angiogenesis Thrombospondin-1

Harmonics in the Squirrel Cage Induction Motor Analytic Calculation Part III: Influence on the Torque-speed Characteristic

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CES Transactions on Electrical Machines and Systems 2024年第1期8卷 86-102页

作者： g.Kovács the ganz Electric Works BudapestHungary

The harmonics that appear in the squirrel cage asynchronous machine have been discussed in great detail in the literature for a long time. However, the systematization of the phenomenon is still pending, so we made an attempt to fill this gap in the previous parts of our study by elaborating formulas for calculation of parasitic torques. It was a general demand among those who work in this field towards the author to verify his formulas with measurements. In the literature, it seems,only one detailed, purposeful series of measurements has been published so far, the purpose of which was to investigate the effect of the number of rotor slots on the torque-speed characteristic curve of the machine. The main goal of this study is to verify the correctness of the formulas by comparing them with the referred series of measurements. Relying on this, the expected synchronous parasitic torques were developed for the frequently used rotor slot numbers-as a design guide for the ***, together with our complete table for radial magnetic pull published in our previous work, the designer has all the principles, data and formulas available for the right number of rotor slots for his given machine and for the drive system. This brings this series of papers to an end.

关键词： Asynchronous parasitic torques Induction motor Squirrel cage rotor Space harmonics Synchronous parasitic torques