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dFT investigation of half-metallic ferromagnetic rare earth based spinels mgHo_(2)Z_(4)(Z=S,Se)

Journal of Rare Earths 2024年第1期42卷 121-128,I0005页

作者： maiza Zanib mumtaz manzoor N.A.Noor m.Waqas Iqbal mazia Asghar H.H.Hegazy A.Laref department of Physics Riphah International UniversityLahore CampusPakistan Research Centre for Advanced materials Science King Khalid UniversityP.O.Box 9004AbhaSaudi Arabia department of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia department of Physics and Astronomy College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Half-metallic ferromagnetism,mechanical as well as thermoelectric properties for rare earth-based spinels mgHo_(2)Z_(4)(Z=S,Se)were investigated using density functional theory(dFT).Structural optimization was done with Perdew-Burke-Ehrenzorf(PBE)sol-generalized gradient approximation(GGA)to calculate the lattice constant of both spinels comparable to experimental *** addition,Born stability criteria and negative formation energy show that our studied spinels are also structurally and dynamically stable in the cubic *** ferromagnetic(Fm)state stability,we also calculated the energy differences among Fm,antiferromagnetic(AFm),and non-magnetic(Nm)***,Curie temperatures of ferromagnetic phases were also *** used Trans-Blaha improved BeckeJohnson(TB-mBJ)potential functional for electronics as well as magnetic characteristics,which lead to the consistent explanation of half-metallic ferromagnetism,representing the whole band-occupancy in material with exact detail of density of states(dOS).The stable Fm state was examined in spinels due to the exchange splitting of Ho cation consisting of p-d hybridizations compatible with the result achieved for electronics band structure and ***,spin magnetic moment was explained in terms of anion,cation,and sharing charge on studied *** addition,the calculated thermoelectric properties clearly show that operation range of these systems may be utilized by future experimental works for identifying the potential applications of these systems.

关键词： Ho-based spinels dFT simulations mechanical parameters Electronic properties hm ferromagnetism Figure of merit

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dose-dependent effect of histamine on antibody generation in vivo

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Asian Pacific Journal of Tropical medicine 2010年第2期3卷 112-116页

作者： Tripathi T Shahid m Khan hm Khan RA Siddiqui mU dePartment of Biochemistry Faculty of MedicineJawaharlal Nehru Medical College and HospitalAligarh Muslim University department of microbiology Faculty of MedicineJawaharlal Nehru Medical College and HospitalAligarh Muslim University department of Pharmacology Faculty of MedicineJawaharlal Nehru Medical College and HospitalAligarh Muslim University department of Biochemistry Faculty of MedicineJawaharlal Nehru Medical College and HospitalAligarh Muslim University

Objective:To delineate immunomodulatory role of histamine on antibody generation pr of ile in rabbit in the present dose-dependent histamine ***:The cohort comprised of three groups(Ⅲ,ⅣandⅤ),containing six rabbits each,and received subcutaneous histamine 50μg/kg×bis in die(b.i.d.),100μg/kg×*** 200μg/kg X b.i.d.,respectively for 10 days (starting from the 1st day).They were subsequently immunized on the 3rd day with intravenous injection of sheep blood cell(SRBC)(1×10 cells/mL).GroupⅡ(positive control)(n=6) received vehicle(sterile distilled water) and immunized at day 3 similarly while groupⅠ(negative control) (n=6) remained non-immunized and received only *** experimentations were performed in *** samples were collected on pre-immunization(pre-I)(day 0),as well as on days 7-,14-,21-,28- and 58- post-immunization(post-I).Immunological parameters[total immunoglobulins(Igs),Igm and IgG]were analyzed by enzyme linked immunosorbent assay (ELISA) ***:Histamine could influence a detectable antibody response to SRBC as early as day 7-post-I,which lasted until day 58- *** results were found statistically significant(Pde evidence that histamine has a short-term effect on antibody generation(until its presence in the body),and the antibody generation titer in vivo were affected by the concentration of histamine.

关键词： Histamine Immumomodulation T-cell dependent antibody response Humoral immune response SRBC

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Effect of Conductive Fillers on the Cyclic Stress-Strain and Nano-Scale Free Volume Properties of Silicone Rubber

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Chinese Journal of Polymer Science 2014年第5期32卷 558-567页

作者： m.H.Abd-El Salam S.El-Gamal m.mohsen d.m.Abd El-maqsoud Physics department Faculty of Education Ain Shams University Physics department Faculty of Science Ain Shams University

The effect of carbon black （CB） and graphite （G） powders on the macroscopic and nano-scale free volume properties of silicone rubber based on poly（di-methylsiloxane）（PdmS） was studied through thermal and cyclic mechanical measurements, as well as with positron annihilation lifetime spectroscopy （PALS）. The melting temperature of the composites （Tm） and the endothermic enthalpy of melting （Δhm） were estimated by differential scanning calorimetry （dSC）. Tm and the degree of crystallinity （χc） of PdmS composites were found to decrease with increasing the CB content. This can be explained due to the increase in physical cross-linking which results in a decrease in the crystallite thickness. Besides, χc was found to be dependent on the filler type. Cyclic stress-strain behavior of PdmS loaded with different contents of filler has been studied. mullins ratio （Rm） was found to be dependent on the filler type and content. It was found that, Rm increases with increasing the filler content due to the increase in physical cross-linking which results in a decrease in the size of free volume, as observed through a decrease of the o-Ps lifetime τ3 measured by PALS. moreover, the hysteresis in PdmS-CB composites was more pronounced than in PdmS-G composites. Furthermore, a correlation was established between the free volume Vf and the mechanical properties of PdmS composites containing different fillers. A negative correlation was observed between Vf and Rm.

关键词： Positron annihilation Positronium Free volume Si-rubber Composite Cyclic mechanical properties.

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Short-and long-term behaviors of drifts in the Callovo-Oxfordian claystone at the meuse/Haute-marne Underground Research Laboratory

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Journal of Rock mechanics and Geotechnical Engineering 2013年第3期5卷 221-230页

作者： G.Armand A.Noiret J.Zghondi d.m.Seyedi ANdRA R&d Meuse/Haute-Marne Underground Research Laboratory ANdRA R&d

Since 2000, the French National Radioactive Waste management Agency （ANdRA） has been constructing an Underground Research Laboratory （URL） at Bure （east of the Paris Basin） to perform experiments in order to obtain in situ data necessary to demonstrate the feasibility of geological repository in the Callovo- Oxfordian claystone. An important experimental program is planned to characterize the response of the rock to different drift construction methods, Before 2008, at the main level of the laboratory, most of the drifts were excavated using pneumatic hammer and supported with rock bolts, sliding steel arches and fiber shotcrete. Other techniques, such as road header techniques, stiff and flexible supports, have also been used to characterize their impacts. The drift network is developed following the in situ major stresses. The parallel drifts are separated enough so as they can be considered independently when their hydromechanical （hm） behaviors are compared. mine-by experiments have been performed to measure the hm response of the rock and the mechanical loading applied to the support system due to the digging and after excavation. drifts exhibit extensional （mode I） and shear fractures （modes II and III） induced by excavation works. The extent of the induced fracture networks depends on the drift orientation versus the in situ stress field. This paper describes the drift convergence and deformation in the surrounding rock walls as function of time and the impact of different support methods on the rock mass behavior. An observation based method is finally applied to distinguish the instantaneous and time-dependent parts of the rock mass deformation around the drifts.

关键词： Field experiments Claystone Tunnel convergence Induced fractures Short- and long-term behaviors

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Simulating long-term effect of Hyrcanian forest loss on phosphorus loading at the sub-watershed level

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Journal of Arid Land 2018年第3期10卷 457-469页

作者： Fatemeh RAJAEI Abbas E SARI Abdolrassoul SALmANmAHINY Timothy O RANdHIR majid dELAVAR Reza d BEHROOZ Alireza m BAVANI department of Environment Faculty of Natural Resources and Marine Science Tarbiat Modares University department of Environmental Gorgan University of Agricultural Science & Natural Resources department of Environmental Conservation University of Massachusetts department of Water Resources Agriculture Faculty Tarbiat Modares University department of Environmental Sciences Faculty of Natural Resources University of Zabol department of Irrigation and drainage Engineering Faculty of Abouraihan University of Tehran

Conversion of forest land to farmland in the Hyrcanian forest of northern Iran increases the nutrient input, especially the phosphorus（P） nutrient, thus impacting the water quality. modeling the effect of forest loss on surface water quality provides valuable information for forest management. This study predicts the future impacts of forest loss between 2010 and 2040 on P loading in the Tajan River watershed at the sub-watershed level. To understand drivers of the land cover, we used Land Change modeler（LCm） combining with the Soil Water Assessment Tool（SWAT） model to simulate the impacts of land use change on P loading. We characterized priority management areas for locating comprehensive and cost-effective management practices at the sub-watershed level. Results show that agricultural expansion has led to an intense deforestation. during the future period 2010–2040, forest area is expected to decrease by 34,739 hm^2. And the areas of pasture and agriculture are expected to increase by 7668 and 27,071 hm^2, respectively. In most sub-watersheds, P pollution will be intensified with the increase in deforestation by the year 2040. And the P concentration is expected to increase from 0.08 to 2.30 mg/L in all of sub-watersheds by the year 2040. It should be noted that the phosphorous concentration exceeds the American Public Health Association′s water quality standard of 0.2 mg/L for P in drinking water in both current and future scenarios in the Tajan River watershed. Only 30% of sub-watersheds will comply with the water quality standards by the year 2040. The finding of the present study highlights the importance of conserving forest area to maintain a stable water quality.

关键词： phosphorus land use change modeling forest loss prioritizing management area Tajan River Iran

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Band-gap engineering of La1-xNdxAlO3(x = 0,0.25,0.50,0.75,1)perovskite using density functional theory：A modified Becke Johnson potential study

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Chinese Physics B 2016年第6期25卷 376-382页

作者： Sandeep d P Rai A Shankar m P Ghimire Anup Pradhan Sakhya T P Sinha R Khenata S Bin Omran R K Thapa department of Physics Mizoram University Aizawl-796004 India department of Physics Pachhunga University College Aizawl-796001 India department of Physics University of North Bengal Darjeeling-734013 India IFW dresden e. V. P. O. Box 270116 D-01171 Dresden Germany department of Physics Bose Institute 93/1 Acharya Prafulla Chandra Road Kolkata 700009 India Laboratoire de Physique Quantique et de modelisation mathematique (LPQ3m) Department de Technologie Universite de Mascara 29000 Mascara Algerie Algeria department of Physics and Astronomy College of Science King Saud University P. O: Box 2455 Riyadh 11451 Saudi Arabia

The structural,electronic,and magnetic properties of the Nd-doped Rare earth aluminate,La1-xNdxAlO3（x = 0%to 100%） alloys are studied using the full potential linearized augmented plane wave（FP-LAPW） method within the density functional *** effects of the Nd substitution in La AlO3 are studied using the supercell *** computed electronic structure with the modified Becke–Johnson（m BJ） potential based approximation indicates that the La1-xNdxAlO3 alloys may possess half-metallic（hm） behaviors when doped with Nd of a finite density of states at the Fermi level（EF）.The direct and indirect band gaps are studied each as a function of x which is the concentration of Nddoped La *** calculated magnetic moments in the La1-xNdxAlO3 alloys are found to arise mainly from the Nd-4f state.A probable half-metallic nature is suggested for each of these systems with supportive integral magnetic moments and highly spin-polarized electronic structures in these doped systems at *** observed decrease of the band gap with the increase in the concentration of Nd doping in La AlO3 is a suitable technique for harnessing useful spintronic and magnetic devices.

关键词： density functional theory rare earth aluminates perovskites electronic structures

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心血管学的分子生物学心功能不全和心肌肥大的表型改变

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德国医学 1994年第3期11卷 127-129页

作者： m.Bhm m.Wankerl E.Erdmann 王来 medizinisehe Klinik Ⅲ für Innere medizin der Universitt zu Kn Josef-Stelzmann-Str.9D-50924 KlnGermany medizinisehe Klinik Ⅲ für Innere medizin der Universitt zu Kln Josef-Stelzmann-Str.9D-50924 KlnGermany 同济医科大学附属同济医院

各种真核细胞的表型及功能取决于其蛋白质的功能状态(离子通道、酶)、转录和翻译过程,以及基本的基因密码有无变异。每个环节的变化均可影响细胞的功能状态和结构;心功能不全及心肌肥大的进程中,上述每一环节均有相应的质与量变化,影响... 详细信息

各种真核细胞的表型及功能取决于其蛋白质的功能状态(离子通道、酶)、转录和翻译过程,以及基本的基因密码有无变异。每个环节的变化均可影响细胞的功能状态和结构;心功能不全及心肌肥大的进程中,上述每一环节均有相应的质与量变化,影响着病程发展。

关键词：心血管学分子生物学心功能不全心肌肥大

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development and Current Status of the Corex and Finex Process

Development and Current Status of the Corex and Finex Proces...

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2007中国钢铁年会

作者： C. Bhm d. Siuka J. Schenk J. Kriechmair Siemens VAI metals Technologies GmbH ＆ Co. LinzAustria Siemens VAI metals Technologies GmbH ＆ Co. LinzAustria Siemens VAI metals Technologies GmbH ＆ Co. LinzAustria Siemens VAI metals Technologies GmbH ＆ Co. LinzAustria

＜正＞With the contract award for a COREX（?） C-3000 plant with an annual capacity of 1.5 million t hot metal by Baosteel Pudong ISCO,PR China,a new milestone for the COREX technology could be *** module represents the up-scaling and the experiences made with the COREX currently being in *** in the raw material sector（price of coke,coking coal and steam coal,etc.）and the general increase of energy cost（natural gas,electric power,etc.）in combination with the positive experiences during the operation make it worth today to carefully evaluate the COREX technology in comparison with the blast furnace technology. Another development,the development of the FINEX（?） technology,is currently carried out by the operation of the FINEX demonstration plant and by the installation of a FINEX 1.5m Plant having an annual capacity of 1.5 million tons hot metal at POSCO Pohang. One main focus of this presentation is laid on developments of the COREX technology,giving inside views about status of the operating COREX plants,new technological developments and factors endeavoring the COREX *** focus is laid on the FINEX process showing the status and the further steps in process development.

关键词： Hot metal iron making COREX FINEX Siemens VAI POSCO

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肥胖症——心血管危险因素

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德国医学 2000年第5期17卷 271-273页

作者： U.Laufs m.Bhm 高亚东 Klinik Ⅲ fr Innere medizin Universitt zu Kln Joseph-Stelzmann-Straβe 9D-50924 KlnGermany 同济医科大学附属同济医院

超重和肥胖是指身体脂肪超过正常范围引起的体重增加。现代观点认为,肥胖病是一种受遗传因素影响的综合征,特点是摄取大量富含脂肪的食物而缺乏必要的体育活动。肥胖症的临床重要性过去一直被低估。肥胖症是高血压、糖尿病、高脂血症... 详细信息

超重和肥胖是指身体脂肪超过正常范围引起的体重增加。现代观点认为,肥胖病是一种受遗传因素影响的综合征,特点是摄取大量富含脂肪的食物而缺乏必要的体育活动。肥胖症的临床重要性过去一直被低估。肥胖症是高血压、糖尿病、高脂血症的重要原因,也是心肌梗死和心功能不全的独立危险因素。根据体重指数[BmI=体重(kg)/身高(m)~2],WHO和德国肥胖病协会将肥胖病分为3级。德国肥胖病的发病率不断上升,目前BmI>30者约占总人口的17％,而BmI>30后,死亡率明显上升。

关键词：肥胖症心血管疾病危险因素并发症

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心力衰竭病理生理变化的现代认识

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德国医学 1994年第3期11卷 147-148页

作者： m.Bhm d.J.Beuckelmann R.H.G.Schwinger E.Erdmann 王琳 Klinik Ⅲ fǜr Innere medizin der Universitt zu Kln Germany 同济医科大学附属同济医院

各种心脏病均可致心脏泵功能下降,心输出量减少,机体为满足重要器官血液供应,一方面通过神经内分泌,另一方面靠心脏本身进行代偿。近年来对移植心脏标本的研究,对其代偿机制有进一步认识。心肌收缩力的调节 1.钙内环境:心肌收缩力与心... 详细信息

各种心脏病均可致心脏泵功能下降,心输出量减少,机体为满足重要器官血液供应,一方面通过神经内分泌,另一方面靠心脏本身进行代偿。近年来对移植心脏标本的研究,对其代偿机制有进一步认识。心肌收缩力的调节 1.钙内环境:心肌收缩力与心肌细胞内钙离子(Ca2+)浓度有关,而胞浆中 Ca2+浓度变化受细胞膜通道、肌浆网及其与蛋白质结合状况的控制。

关键词：心力衰竭病理生理学

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