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Effect of TCA-depletion of extrinsic polypeptides on electron transport on oxidizing side of PS II

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chinese Science Bulletin 1997年第3期42卷 227-231页

作者： Li, R Shen, YG Xu, ch Lu, W Tu, TC Yao, S Lin, NY Shanghai Institute of Plant Physiology Chinese Academy of Sciences Shanghai China Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai China Shanghai Institute of Nuclear Research Chinese Academy of Sciences Shanghai China

PHOTOSYSTEM Ⅱ （PS Ⅱ） particles capable of O2 evolution contain reaction center polypeptides d1 and d2, cytchrome b559, chlorophyll （chl）-binding proteins CP47 and CP43, three extrinsic polypeptides （with apparent molecular masses of 17, 23 and 33 ku） and cofactors needed for light energy conversion. After illumination, PS Ⅱ oxygen evolution complex （OEC） catalyzes the oxidization of water to molecular oxygen through S0→S4 redox state transition. The three extrinsic polypeptides have been revealed to be closely related to the photosynthetic O2 evolution.

关键词： PSⅡ extrinsic polypeptide trichloroacetate (TCA-NaOH) FTIR EPR signal Ⅱ.

Application of Multi-Frequency SAR Images for Knowledge Acquisition

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Advances in Remote Sensing 2013年第3期2卷 242-246页

作者： V. Battsengel d. Amarsaikhan A. Munkh-Erdene ch. Bolorchuluun ch. Narantsetseg School of Geography and Geology National University of Mongolia Ulaanbaatar Mongolia

The aim of this research is to apply TerraSAR X-band, Envisat C-band and Palsar L-band synthetic aperture radar (SAR) images for a knowledge acquisition process. For the study, backscattering properties of different natural and man-made objects of urban environment are analyzed on the basis of statistics of signatures of the selected classes. After the knowledge acquisition, for the acquired knowledge representation, a rule-based approach is proposed. Overall, the research demonstrated that the multi-frequency radar images can be effectively used for the knowledge acquisition as well as for the analysis of different land cover types.

关键词： Knowledge Acquisition SAR Microwave Wavelengths Backscattering

Photoproduction of the Θ^+ and its vector andaxial-vector structure

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chinese Physics C 2009年第12期33卷 1279-1284页

作者： H.-ch. Kim K. Goeke T. Ledwig S. i. Nam department of Physics Inha University Incheon 402-751 Republic of Korea Institut fr Theoretische Physik II Ruhr-Universitt Bochum D-44780 Bochum Germany Institut fr Kernphysik Universitt Mainz D-55099 Mainz Germany department of Physics Chung-Yuan Christian University (CYCU)

We present recent investigations on the vector and axial-vector transitions of the baryon antidecuplet within the framework of the self-consistent SU（3） chiral quark-soliton model, taking into account the 1/No rotational and linear mscorrections. The main contribution to the electric-like transition form factor comes from the wave-function corrections. This is a consequence of the generalized Ademollo-Gatto theorem. It is also found that in general the leading-order contributions are almost canceled by the rotational 1/No corrections. The results are summarized as follows： the vector and tensor K＇NO coupling constants, gK＊N= 0.74--0.87 and fk＊N =0.53--1.16, respectively, and F→KN = 0.71 MeV, based on the result of the KN coupling constant gKne =0.83. We also show the differential cross sections and beam asymmetries, based on the present results. We also discuss the connection of present results with the original work by diakonov, Petrov, and Polyakov.

关键词： Baryon antidecuplet vector and axial-vector transition form factors chiral quark-soliton model,Photoproduction of the +

The first discovery of the middle Lochkovian (devonian) conodonts in South Gobi, Mongolia

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Science china Earth Sciences 2005年第1期48卷 48-52页

作者： ch.Minjin W.Ziegler J.Munchtsetseg J.Gereltsetseg J.Undarya Mongolian University of Science and Technology Senckenberg MuseumMongolian University of Science and TechnologyMongolian University of Science and TechnologyMongolian University of Science and Technology School of Geology46/520UlaanbaatarMongoliaSenckenberganlage 25D-60325Frankfurt/MGermanySchool of Geology46/520UlaanbaatarMongoliaSchool of Geology46/520UlaanbaatarMongoliaSchool of Geology46/520UlaanbaatarMongolia

The Tsagaanbulag Formation of the Ulaan-Shand section in the Shine Jinst area was assigned to Silurian (Wenlock-Pridoli) previously. But the present authors have found some very important conodonts, including Lanea omoalpha, Amydrotaxis johnsoni, "Ozarkodina"planililingua, Pedavis sp., from the Tsagaanbulag and Amansair formations, clearly indicating that these two formations should be assigned to middle Lochkovian which are widely distributed in china and Mongolia. The existence of the marine Wenlockain and early Ludlovian deposits in Mongolia is a noteworthy problem.

关键词： Tsagaanbulag Formation, conodonts, middle Lochkovian, South Gobi, Mongolia.

NGd Analysis of defected Ground and SIW-Matched Structure

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chinese Journal of Electronics 2023年第2期32卷 343-352页

作者： GU Taochen WAN Fayu GE Junxiang Lalléchère Sébastien Rahajandraibe Wenceslas Ravelo Blaise Nanjing University of Information Science & Technology (NUIST) Université Clermont Auvergne (UCA) CNRS SIGMA Clermont Aix-Marseille University CNRS University of Toulon

A bandpass negative group delay(NGd)passive circuit based on defect ground structure(dGS)and substrate integrated waveguide(SIW)-matched is developed in the paper. The NGd dGS topology is originally built with notched cells associated with self-matched substrate waveguide elements. The dGS design method is introduced as a function of the geometrical notched and SIW via elements. Then, parametric analyses based on full wave 3-d electromagnetic S-parameter simulations were considered to investigate the influence of dGS physical size effects. The design method feasibility study is validated with fully distributed microstrip circuit prototype. Significant bandpass NGd function performances were validated with 3-d simulations and measurements with-1.69 ns negative group delay value around 2 GHz center frequency over 33.7 MHz NGd bandwidth. Insertion loss is 4.37 d B, and reflection loss reaches 41.5 d B.

关键词： Solid modeling Prototypes Electromagnetic waveguides Reflection Passive circuits delays Frequency measurement

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湍流预混火焰中的浮力效应

工程热物理学报 2004年第3期25卷 527-530页

作者：王岳雷宇 ch Eigenbrod Y Tang 中国科学院工程热物理研究所 Universitat Bremen D-28359 BremenGermany

本文利用数值模拟研究了浮力对湍流预混V形火焰平均速度场的影响,发现浮力效应主要体现在远场区域,而在火焰刷附近非常有限;利用落塔和 OH-PLIF 方法在正常重力和微重力下观测了火焰皱褶,发现浮力压制火焰皱褶的程度与湍流强度密切相关... 详细信息

本文利用数值模拟研究了浮力对湍流预混V形火焰平均速度场的影响,发现浮力效应主要体现在远场区域,而在火焰刷附近非常有限;利用落塔和 OH-PLIF 方法在正常重力和微重力下观测了火焰皱褶,发现浮力压制火焰皱褶的程度与湍流强度密切相关。分析表明斜压机理是浮力影响火焰皱褶的重要原因。

关键词：浮力预混火焰数值模拟 OH-PLIF 皱褶

Synthesis, Crystal Structure and Infrared characterization of Bis(4-dimethylamino-pyridinium) Tetrachlorocuprate

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American Journal of Analytical chemistry 2015年第5期6卷 446-456页

作者： Mahjouba Ben Nasr Frédéric Lefebvre chérif Ben Nasr Laboratoire de chimie des Matériaux Faculté des Sciences de Bizerte Université de Carthage Zarzouna Tunisie Laboratoire de chimie Organométallique de Surface (LCOMS) Ecole Supérieure de Chimie Physique Electronique Villeurbanne France

The chemical preparation, crystal structure and spectroscopic characterization of a novel organic-inorganic hybrid material, bis(4-dimethylaminopyridinium) tetrachlorocuprate, have been reported. This compound crystallizes in the monoclinic system in space group C2/c and cell parameters a = 12.4356 (18), b = 12.0901 (17), c = 14.094 (2) Å, β = 115.303 (2)°, Z = 4 and V = 1915.8 (5) Å3. In the title salt, (C7H11N2)2CuCl4, both 4-dimethylaminopyridinium cations are protonated at their pyridine N atoms. The geometry of the CuCl2-4 ions is intermediate between tetrahedral and square planar. The atomic arrangement can be described by an alternation of inorganic layers built up by tetrachlorocuprate anions and organic layers formed by 4-dimethylaminopyridinium cations. The organic layers are located in sandwich between the inorganic layers. The anionic and cationic layers are held together by N-H···Cl and C-H···Cl hydrogen bonds into a three-dimensional network. The individual cations are π-π stacked with their neighbors at a distance of 3.7622 (5) Å. The vibrational absorption bands were identified by infrared spectroscopy and dFT calculations allowed their attribution.

关键词： Crystal Structure 4-dimethylaminopyridine Hydrogen Bonds π-π Interactions dFT Calculations

Alzheimer’s disease and type 2 diabetes mellitus:Pathophysiologic and pharmacotherapeutics links

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World Journal of diabetes 2021年第6期12卷 745-766页

作者： Milagros Rojas Mervin chávez-Castillo Jordan Bautista Ángel Ortega Manuel Nava Juan Salazar Edgar díaz-Camargo Oscar Medina Joselyn Rojas-Quintero Valmore Bermúdez Endocrine and Metabolic diseases Research Center School of MedicineUniversity of ZuliaMaracaibo 4004Venezuela Universidad Simón Bolívar Facultad de Ciencias Jurídicas y SocialesCúcuta 540006Colombia Pulmonary and Critical Care Medicine department Brigham and Women's HospitalHarvard Medical SchoolBostonMA 02155United States Universidad Simón Bolívar Facultad de Ciencias de la SaludBarranquilla 080001Colombia

At present,Alzheimer’s disease(Ad)and type 2 diabetes mellitus(T2dM)are two highly prevalent disorders worldwide,especially among elderly individuals.T2dM appears to be associated with cognitive dysfunction,with a higher risk of developing neurocognitive disorders,including *** diseases have been observed to share various pathophysiological mechanisms,including alterations in insulin signaling,defects in glucose transporters(GLUTs),and mitochondrial dysfunctions in the ***,the aim of this review is to summarize the current knowledge regarding the molecular mechanisms implicated in the association of these pathologies as well as recent therapeutic *** this context,the hyperphosphorylation of tau and the formation of neurofibrillary tangles have been associated with the dysfunction of the phosphatidylinositol 3-kinase and mitogen-activated protein kinase pathways in the nervous tissues as well as the decrease in the expression of GLUT-1 and GLUT-3 in the different areas of the brain,increase in reactive oxygen species,and production of mitochondrial alterations that occur in *** findings have contributed to the implementation of overlapping pharmacological interventions based on the use of insulin and antidiabetic drugs,or,more recently,azeliragon,amylin,among others,which have shown possible beneficial effects in diabetic patients diagnosed with Ad.

关键词： Alzheimer’s disease Type 2 diabetes mellitus Oxidative stress Islet amyloid polypeptide Glucagon-like peptide 1 Cognitive dysfunction Hypoglycemic agents

Proline and Oxidative Metabolism in Young Pecan Trees Associated with Sulphate Accumulation

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Phyton-International Journal of Experimental Botany 2022年第6期91卷 1141-1152页

作者： dalila Jacqueline Escudero-Almanza Oscar Cruz-Alvarez Ofelia Adriana Hernández-Rodríguez Juan Luis Jacobo-Cuellar Esteban Sánchez-chávez Pablo Preciado-Rángel dámaris Leopoldina Ojeda-Barrios Facultad de Ciencias Agrotecnológicas Universidad Autónoma de ChihuahuaChihuahua31350México Centro de Investigación en Alimentación y desarrollo A.C.Delicias33088México InstitutoTecnologico Nacional de México-Instituto Tecnológico de Torreón Coahuila27170México

Pecan[Carya illinoinensis(Wangenh.)***.]is a deciduous tree whose fruits(nuts)are of high economic value and offer excellent nutritional ***,soils high in sulphates can limit its growth and *** with 5-year-old trees of‘Western Schley’pecan grown in soils high in sulphates,the levels of proline and oxidative metabolism were recorded in the *** showed that different levels of visible leaflet damage(‘sufficiency’,‘low’,‘moderate’or‘severe’)were associated with different levels of leaflet sulphates(mg kg^(−1)):‘sufficiency’(≤40),‘low’(41–60),‘moderate’(61–80)and‘severe’(80–100).‘Severe’sulphate damage was associated with significant reductions in chlorophyll(Tchl)(17.04μg g^(−1)),relative water content(RWC)(50%)and leaf area(LA),and with increases in the concentrations of total carotenoids(TC)and proline(Prl).Increases were also observed in the activities of the oxidative metabolism enzymes:superoxide dismutase(SOd)(1.82 units min^(−1) g^(−1)),catalase(CAT)(2.86μmol H_(2)O_(2) min^(−1) g^(−1))and antioxidant capacity(AC)(87%dPPH inhibition).However,guaiacol peroxidase(GP)showed a reduction(2.97 nmol GSH min^(−1) g^(−1)).An inverse relationship was found between the sulphate concentration in the leaflets with respect to the evaluated parameters of Tchl,TC,RWC,LA,AC,and *** synthesis and antioxidant enzymatic activity indicate salt stress in pecan leaflets in orchards irrigated with deep-well water high in sulphates.

关键词： Carya illinoinensis catalase guaiacol peroxidase salt stress photosynthetic pigments superoxide dismutase