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Applied Mathematics and Mechanics(English Edition) 2010年第7期31卷 797-804页

作者： S.p.M.ISA N.M.ARIFIN R.NAZAR M.N.SAAD Institute for Mathematical Research Universiti Putra Malaysia School of Mathematical Sciences Universiti Kebangsaan Malaysia

This paper investigates the effect of non-uniform temperature gradient and magnetic field on Marangoni convection in a horizontal fluid layer heated from below and cooled from above with a constant heat flux. A linear stability analysis is performed. The influence of various parameters on the convection onset is analyzed. Six non-uniform basic temperature profiles are considered, and some general conclusions about their desta- bilizing effects are presented.

关键词： Maxangoni convection non-uniform temperature magnetic field

Late Quaternary sinistral slip rate along the Altyn Tagh fault and its structural transformation model

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Science china Earth Sciences 2005年第3期48卷 384-397页

作者： p. Tapponnier J. Van Der Woerd F. J. Ryerson A.S. Meriaux Laboratoire de Tectonique Institut de Physique du Globe de Paris FranceLaboratoire de Tectonique Institut de Physique du Globe de Paris FranceIGPP Lawrence Livermore Laboratory Livermore CA 94550 USALaboratoire de Tectonique Institut de Physique du Globe de Paris France

Based on technical processing of high-resolution SpOT images and aerophotos, detailed mapping of offset landforms in combination with field examination and displacement measurement, and dating of offset geomorphic surfaces by using carbon fourteen (14C), cos- mogenic nuclides (10Be+26Al) and thermoluminescence (TL) methods, the Holocene sinistral slip rates on different segments of the Altyn Tagh Fault (ATF) are obtained. The slip rates reach 17.5 ±2 mm/a on the central and western segments west of Aksay Town, 11±3.5 mm/a on the Subei-Shibaocheng segment, 4.8±1.0 mm/a on the Sulehe segment and only 2.2±0.2 mm/a on the Kuantanshan segment, an easternmost segment of the ATF. The sudden change points for loss of sinistral slip rates are located at the Subei, Shibaocheng and Shulehe triple junctions where NW-trending active thrust faults splay from the ATF and propagate southeastward. Slip vector analyses indicate that the loss of the sinistral slip rates from west to east across a triple junction has structurally transformed into local crustal shortening perpendicular to the active thrust faults and strong uplifting of the thrust sheets to form the NW-trending Danghe Nanshan, Daxueshan and Qilianshan Ranges. Therefore, the eastward extrusion of the northern Qing- hai-Tibetan plateau is limited and this is in accord with “the imbricated thrusting transforma- tion-limited extrusion model”.

关键词： Altyn Tagh Fault, sinistral strike-slip rate, structural transformation, extrusion tectonics.

The Quaternary Structure of NADpH Thioredoxin Reductase C Is Redox-Sensitive

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Molecular plant 2009年第3期2卷 457-467页

作者： Juan Manuel pérez-Ruiz Maricruz Gonzalez Maria Cristina Spinola Luisa Maria Sandalio Francisco Javier Cejudo Instituto de Bioqulmica Vegetal y Fotoslntesis Universidad de Sevilla y CSIC Avda Américo Vespucio 49 41092-Sevilla Spain present address: plant Biology Laboratory The Salk Institute 10010 N. Torrey Pines Rd La Jolla CA 92037 USA Estacion Experimental del Zaidin CSIC C/Prof Albareda 1 18008-Granada Spain

NADpH thioredoxin reductase C （NTRC） is a chlorop.ast enzyme able to conjugate NADpH thioredoxin reductase （NTR） and thioredoxin （TRX） activities for the efficient reduction of 2-Cys peroxiredoxin （2-Cys pRX）. Because NADpH can be produced in chlorop.asts during darkness, NTRC plays a key role for plant peroxide detoxification during the night. Here, it is shown that the quaternary structure of NTRC is highly dependent on its redox status. In vitro, most of the enzyme adopted an oligomeric state that disaggregated in dimers upon addition of NADpH, NADH, or DTT. Gel filtration and Western blot analysis of protein extracts from Arabidopsis chlorop.ast stroma showed that native NTRC forms aggregates, which are sensitive to NADpH and DTT, suggesting that the aggregation state might be a significant aspect of NTRC activity in vivo. Moreover, the enzyme is localized in clusters in Arabidopsis chlorop.asts. NTRC triple and double mutants, A164G- V182E-R183F and A164G-R183F, replacing key residues of NADpH binding site, showed reduced activity but were still able to dimerize though with an increase in intermediary forms. Based on these results, we propose that the catalytically active form of NTRC is the dimer, which formation is induced by NADpH.

关键词： Abiotic/environmental stress oxidative and photo-oxidative stress photosynthesis Arabidopsis rice.

Effect of Silver Nanoparticles on Growth of Eukaryotic Green Algae

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Nano-Micro Letters 2012年第3期4卷 158-165页

作者： Anjali Dash Anand p.Singh Bansh R.chaudhary Sunil K.Singh Debabrata Dash Department of Biochemistry Institute of Medical SciencesBanaras Hindu University Centre of Advanced Study in Botany Banaras Hindu University

Silver nanoparticles,endowed with powerful antimicrobial property,are the most widely used nanomaterial in consumer products,with associated risk of their easy access to environment and freshwater ecosystems by surface *** toxic effects of nanosilver on bacterial,fungal and mammalian cells have been documented,its impact on algal growth remains *** oedogonia and chara vulgaris are predominant members of photosynthetic eukaryotic algae,which form major component of global aquatic *** we report for the first time that nanosilver has significant adverse effects on growth and morphology of these filamentous green algae in a dose-dependent *** of algal thalli to increasing concentrations of silver nanoparticles resulted in progressive depletion in algal chlorophyll content,chromosome instability and mitotic disturbance,associated with morphological malformations in algal *** micrographs revealed dramatic alterations in cell wall in nanoparticle-treated algae,characterized with cell wall rupture and degradation in *** these observations underscore severe deleterious effects of nanosilver on aquatic environment,the information can also be exploited as a bioengineering strategy to control unwanted and persistent growth of noxious algal weeds that clog the municipal water supply and water channels and produce fouling of water bodies.

关键词： Silver nanoparticles Green algae Algal growth photosynthetic pigment Nanotoxicity

Electrical properties of Na_(2)pb_(2)R_(2)W_(2)Ti_(4)V_(4)O_(30)(R=Dy,pr)ceramics

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Journal of Advanced Ceramics 2013年第2期2卷 112-118页

作者： piyush R.DAS B.N.pARIDA R.pADHEE R.N.p.chOUDHARY Department of physics Institute of Technical Education&ResearchSiksha‘O’Anusandahan UniversityKhandagiriBhubaneswar 751030OdishaIndia

The polycrystalline samples of complex tungsten bronze(TB)Na_(2)pb_(2)R_(2)W_(2)Ti_(4)V_(4)O_(30)(R=Dy,pr)compounds were prepared by solid-state reaction ***-temperature preliminary structural studies confirm the formation of the compounds in the orthorhombic crystal *** studies of electrical properties of the materials using complex impedance spectroscopy technique exhibit that the impedance and related parameters are strongly dependent upon temperature and microstructure(bulk,grain boundary,etc).An observation of negative temperature coefficient of resistance(NTCR)suggests the materials have semiconducting *** variation of AC conductivity with temperature shows a typical Arrhenius behavior of the *** the samples obey Jonscher’s universal power *** existence of hopping mechanism in the electrical transport processes in the system with non-exponential type of conductivity relaxation is confirmed by electrical modulus analysis.

关键词： ceramics impedance spectroscopy electrical properties ferroelectricity microstructure

Climate change impact in the Western Himalaya:people's perception and adaptive strategies

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Journal of Mountain Science 2017年第2期14卷 403-416页

作者： Vikram S.Negi Rakesh K.Maikhuri Dalbeer pharswan Shinny Thakur pitamber p.Dhyani G.B.pant National Institute of Himalayan Environment and Sustainable Development Kosi-KatarmalAlmoraUttarakhandIndia G.B.pant National Institute of Himalayan Environment and Sustainable Development Garhwal UnitSrinagar(Garhwal)UttarakhandIndia

The Himalaya represents a vast mountain system and globally valued for its significant role in regulation of global as well as regional climate that has direct impact on biodiversity and ecosystem services crucial for sustenance of millions of people in Himalaya and adjoining areas. However, mountain regions worldwide are impacted by climate change and at the same time represent distinctive area for the assessment of climate related impacts. Climate change impacts in Himalayan region have its implications on food production, natural ecosystems,retreat of glacier, water supply, human and animal health and overall human well being. The livelihood and food security of the people inhabited in region largely depend on climate sensitive sectors ***, livestock, forestry and their interlinkages with each other, and has the potential to break down food and nutritional security as well as livelihood support systems. people's perception and understanding of climate can be an important asset when it comes to adaptation to climate change impact;however it is not taken into consideration for the development of policy design and implementation of modern mitigation and adaptation strategies by governments and other civil society *** knowledge of local people and farming communities for rural landscape management and sustainable use of bioresources is gaining credence as a key strategy to cope up with the climate ***, the present study analyzes the indigenous knowledge of local people and their perceptions on climate change, and also documented adaptation approaches at local level in mountain ecosystem of western Himalaya. The study could be useful to policy makers to design appropriate adaptation strategies to cope up with the impacts of climate change.

关键词： Western Himalaya Climate change people's perception Traditional knowledge Adaptation

The Extension of Hypergame Analysis and Its Application

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Journal of Systems Engineering and Electronics 1994年第2期5卷 47-52页

作者： Shu Jiang and Liu Deming (National University of Defense Technology. Hunan. 410073, p. R .china) National University of Defense Technology Hunan 410073 P.R. China

The hypergame analysis mainly processes the conflict in which one or more of the players are notfully aware of the nature of the conflict situation. it is a kind of qualitative technology which describes thedecieve and anti-decieve *** defect of hypergame analysis appears in that the decision goalcombines with the course of the decision analysis. This paper puts forward the concept 'sanctioned rampart', which reflects the dynamics course of players' decision analysis based on decision goal. At the *** extended hypergame is used to analyse the whole course of 'Gulf Crisis'.

关键词： Conflict analysis Hypergame Sanctioned chain. Sanctioned rampart.

Molecular markers(pECAM-1,ICAM-3,HLA-DR)determine prognosis in primary non-Hodgkin's gastric lymphoma patients

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World Journal of Gastroenterology 2006年第12期12卷 1924-1932页

作者： alexander Darom Ilias p Gomatos Emmanuel Leandros Emmu chatzigianni Dimitris panousopoulos Manousos M Konstadoulakis George Androulakis Laboratory of Surgical Research First Department of Propaedeutic SurgeryAthens Medical SchoolHippokration Hospital of Athens114 Q.Sofia Ave11527 AthensGreece

AIM： To investigate the prognostic significance of pECAM-1, ICAM-3 and HLA-DR antigens in patients with primary non-Hodgkin＇s gastric lymphoma. METHODS： We immunohistochemically studied pECAM-1, ICAM-3 and HLA-DR antigen expression in 36 B-cell MALT-type primary gastric lymphoma patients. Ten non-malignant and ten healthy gastric tissue specimens were used as controls. Clinicopathological and survival data were correlated with the staining results. RESULTS： HLA-DR antigen expression was detected in 33 gastric lymphoma patients （91.7%） and 6 nonmalignant patients （54.5%）. pECAM-1 stained tumor cells of 10 patients （27.8%）, endothelial cells of 9 patients （25%） and inflammatory infiltrate of 4 patients （40%） with benign gastric disease. ICAM-3 expression was observed on the tumor cells of 17 patients （47.2%）, while 5 non-malignant patients （50%） were stained positive as well. None of the healthy controls was stained for any of the genes studied. In the multivariate analysis, HLA-DR antigen and pECAM-1 were proved to be statistically significant independent prognostic factors associated with a favourable and an unfavourable prognosis respectively （p= 0.009 and p= 0.003）. In the univariate analysis, pECAM-1（＋）/ICAM-3（-） and HLA-DR（-）/ICAM-3（-） patients exhibited a significantly decreased overall survival compared to those with the exactly opposite gene expression patterns （p=0.0041 and p= 0.0091, respectively）. Those patients who were HLA-DR（＋）/ICAM-3（＋）/pECAM-I（-）（n = 8） had a significantly higher survival rate compared to the rest of the group （n = 24）（p= 0.0289）. CONCLUSION： pECAM-1, ICAM-3 and HLA-DR are representative markers of tumor expansion potential and host immune surveillance respectively. Their combined use may help us to identify high-risk patients who could benefit from more aggressive therapeutic protocols.

关键词： pECAM-1 ICAM-3 HLA-DR Non-Hodgkin's gastric lymphoma prognosis

Simulation of Control and Guidance System for the Spinning Missile

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Journal of Systems Engineering and Electronics 1994年第3期5卷 49-56页

作者： Meng Daikui (china changfeng System Engineering Corporation, p.O.Box 142-30, Beiging 100854, china) china changfeng System Engineering Corporation P.O. Box 142-30 Beiging 100854 China

Adopted for some small-size short range surface-to-air missiles and antitank guided missiles is a single-channel control method of making missile rotating around its longitudinal axis. In hardware-in-the-loop simulations of the guidance and control system for these kinds of spinning missiles, improper use of special simulation equipment and test method will cause significant errors, even lead to failure of the simulation. In this article, the author gives an analysis of the causes of significant errors and failure of the simulation, and puts forward a solution, which is improved workable in making the hardward-in-the-loop simulation successful.

关键词： Computer simulation Error analysis Computer system recovery Missiles

Timing of metamorphism and deformation in the Swat valley, northern pakistan:Insight into garnet-monazite HREE partitioning

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Geoscience Frontiers 2019年第3期10卷 849-861页

作者： Kyle p.Larson Asghar Ali Sudip Shrestha Mathieu Soret John M.Cottle Rafique Ahmad University of British Columbia Okanagan Earth Environmental and Geographic Sciences University of peshawar Department of Geology University of Califomia Santa Barbara Department of Earth Sciences The Bacha Khan University Department of Geology

New metamorphic petrology and geochronology from the Loe Sar dome in the Swat region of northern pakistan place refined constraints on the pressure, temperature and timing of metamorphism and deformation in that part of the Himalayan orogen. Thermodynamic modelling and monazite petrochronology indicate that metamorphism in the area followed a prograde evolution from ～525 ± 25 ℃and 6 士 0.5 kbar to ～610 ± 25 ℃ and 9 士 0.5 kbar, between ca. 39 Ma and 28 Ma. partitioning of heavy rare earth elements between garnet rims and 30-28 Ma monazite are interpreted to indicate coeval crystallization at peak conditions. Microtextural relationships indicate that garnet rim growth post-dated the development of the main foliation in the area. The regional foliation is folded about large-scale N-S trending fold axes and overprinting E-W trending folds to form km-scale domal culminations. The textural relationships observed indicate that final dome development must be younger than the 30-28 Ma monazite that grew with garnet rims post-regional foliation development, but pre-doming-related deformation. This new timing constraint helps resolve discrepancy between previous interpretations,which have alternately suggested that N-S trending regional folds must be either pre-or post-early Oligocene. Finally, when combined with existing hornblende and white mica cooling ages, these new data indicate that the study area was exhumed rapidly following peak metamorphism.

关键词： pakistan Himalaya Monazite petrochronology Metamorphism phase equilibria modelling Deformation