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Existence of Entropy Solution for Degenerate Parabolic-Hyperbolic Problem Involving p (x )-Laplacian with Neumann Boundary Condition

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Diversifying Resistance Mechanisms in Cereal Crops Using Microphenomics

Applied Mathematics（应用数学） 2024年第7期 455页

作者： Mohamed Karimou Gazibo Duni Yegbonoma frédéric Zongo

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Plant Phenomics 2023年第1期5卷 1-5页

作者： Peter M.Dracatos Stefanie Lück Dimitar K.Douchkov Department of Animal Plant and Soil SciencesAgriBioLa Trobe UniversityBundooraVIC 3086Australia Leibniz Institute of Plant Genetics and Crop Plant Research(IPK)Gatersleben Corrensstrasse 306466 Seeland OT GaterslebenGermany

hole-grain cereals,including wheat,barley,oat,rye,corn,rice,millet,and triticale,are a rich source of calories,essential vitamins,minerals,and phytochemicals that both nourish and protect humans and animals from diseases such as heart attack and cancer[1].However,susceptibility to foliar diseases caused by necrotrophic or biotrophic fungal pathogens continues to reduce yield potential or lead to total crop failure and famine in developing nations[2].Historically,foliar diseases of cereals have been controlled using either fungicide treatment[3]or plant breeding[4].

关键词： breeding cereal corn

Tracing the formation and differentiation of the Earth by non-traditional stable isotopes

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Science China Earth Sciences 2019年第11期62卷 1702-1715页

作者： Fangzhen TENG Shuijiong WANG frédéric MOYNIER Isotope Laboratory Department of Earth and Space SciencesUniversity of WashingtonSeattleWA 98195-1310USA State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China Institut de Physique du Globe de Paris Universite de ParisParis 75238France Institut Universitaire de france Paris 75231France State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China

The Earth has grown from chaotically mixed small dusts and gases to its present highly differentiated layered structure over the past 4.567 billion years. This differentiation has led to the formation of the atmosphere, hydrosphere,biosphere, crust, mantle, and core. The timing and mechanism for the formation and evolution of these different layers are still subjects of intense debate. This review brings together recent advances in using non-traditional stable isotopes to constrain major events and processes leading to the formation and differentiation of the Earth, including the Moon-forming giant impact, crustmantle interactions, evolution of life, the rise of atmospheric oxygen, extreme paleoclimate changes, and cooling rate of magmas.

关键词： Non-traditional stable isotopes Differentiation of the Earth Crust-mantle interactions Atmospheric evolution Snowball Earth Mass extinction

Holographic models of the scalar sector of QCD

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Chinese Physics C 2010年第9期34卷 1516-1519页

作者： frédéric Jugeau TPCSF Institute of High Energy PhysicsChinese Academy of Sciences

We investigate the AdS/QCD duality for the two-point correlation functions of the lowest dimension scalar meson and scalar glueball operators,in the case of the Soft Wall holographic model of *** and decay constants as well as gluon condensates are compared to their QCD *** particular,the role of the boundary conditions for the bulk-to-boundary propagators is emphasized.

关键词： AdS/QCD correspondence holographic models of QCD hadron spectroscopy

First determination of the highly genotoxic fungal contaminant altertoxin II in a naturally infested apple sample

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Emerging Contaminants 2020年第1期6卷 82-86页

作者： hannes Puntscher Doris Marko Benedikt Warth Department of Food Chemistry and Toxicology Faculty of ChemistryUniversity of ViennaWahringer Str.381090ViennaAustria

Altertoxin II is an epoxide-holding perylene quinone and secondary metabolite produced by Alternaria *** genotoxic potential and the high concentrations determined in laboratory fungal cultures resulted in an increased scientific interest in this emerging ***,no natural occurrence in food has been reported to date to the best of our ***,we unambiguously identified altertoxin II in a naturally infected,unprocessed *** a validated LC-MS/MS method,fruit peel spots(approx.1 mm in diameter),typically associated with Alternaria infestation,were tested for 17 mycotoxins produced by this *** concentrations of tentoxin were determined 24 h after harvest,and the dibenzopyrones alternariol,alternariol monomethyl ether(AME)and AME-3-sulfate after six months of ***,these contamination patterns can be considered unlikely to be of toxicological concern for ***,an inconspicuous peel lesion(0.5×1 cm)separately sampled from a stored apple,exhibited considerably high concentrations of 14 Alternaria toxins,including dibenzopyrones,their barely studied modified forms(glucosides and sulfates),as well as genotoxic perylene quinones including altertoxin *** the toxicological potential of this compound,contaminations in such infected fruit parts should not be underestimated,*** the case of exposure through the consumption of fresh smoothies or fruit juices.

关键词： Alternaria alternata Emerging contaminants Genotoxicity Food safety Plant pathology Liquid chromatography tandem mass spectrometry

Numerical simulation of triaxial compression test for brittle rock sample using a modified constitutive law considering degradation and dilation behavior

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Journal of Central South University 2015年第8期22卷 3097-3107页

作者：谭鑫 KONIETZKY H früHWIRT T College of Civil Engineering Hunan University Geotechnical Institute TU Bergakademie Freiberg

The understanding of the rock deformation and failure process and the development of appropriate constitutive models are the basis for solving problems in rock engineering. In order to investigate progressive failure behavior in brittle rocks, a modified constitutive model was developed which follows the principles of the continuum damage mechanics method. It incorporates non-linear Hoek-Brown failure criterion, confining pressure-dependent strength degradation and volume dilation laws, and is able to represent the nonlinear degradation and dilation behaviors of brittle rocks in the post-failure region. A series of triaxial compression tests were carried out on Eibenstock(Germany) granite samples. Based on a lab data fitting procedure, a consistent parameter set for the modified constitutive model was deduced and implemented into the numerical code FLAC3 D. The good agreement between numerical and laboratory results indicates that the modified constitutive law is well suited to represent the nonlinear mechanical behavior of brittle rock especially in the post-failure region.

关键词： progress failure strength degradation dilation Hoek-Brown criterion numerical simulation brittle rock

Mechanical Behaviour and Microstructure Evolution of Superplastic Mg-8.4 wt pct Li Alloy and Effect of Grain Size and Phase Ratio on Its Elongation

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Journal of Materials Science & Technology 2000年第1期16卷 55-58页

作者： Cao, fr Cui, JZ Wen, JL Lei, F Northeastern Univ Sch Met & Mat Dept Mat & Forming Control Shenyang 110006 Peoples R China

Mechanical properties and microstructure evolution of Mg-8.4 wt pet Li alloy have been investigated. The superplastic elongation-to-failure 920% at 573 K and initial strain rate of 5 x 10(-4) s(-1) at low nominal stress 2 MPa has been demonstrated. It was shown through optical microstructure that the average grain sizes at gauge length section before and after superplastic tension and at grip section were 7.5 mu m, 31.7 mu m and 20 mu m respectively, indicating significant deformation induced grain growth and static grain growth. Comparison of experiment data with published data for superplastic Mg-Li alloys shows that fine grain size and about 50 to 50 phase ratio contribute to achieving the largest superplasticity. Some related research works in other alloys are compiled and further evidences to such theoretic argument are provided.

关键词： Magnesium alloys

On the installation of an in situ large-scale vertical SEALing (VSEAL) experiment on bentonite pellet-powder mixture

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第9期15卷 2388-2401页

作者： Nadia Mokni Justo Cabrera frédéric Deleruyelle Institut de Radioprotection et de SûretéNucléaire(IRSN) PSE-ENV/SEDRE/LETISFontenay-aux-Roses92260France

Recently,the Institute for Radiological protection and Nuclear Safety(IRSN)has launched VSEAL(Vertical SEALing)project to investigate the impact of gas migration on the long-term performance of bentonite based vertical sealing systems(VSS).The first VSEAL in situ test was emplaced in IRSN’s Underground Research Laboratory(URL)in Tournemire(france)in 2019 and was equipped with 76 wired and wireless *** test is still in progress,but the collected set of data provides already valuable information of the hydro-mechanical behavior of VSS during *** swelling core consists of a mixture of highdensity pellets and powder of MX80 bentonite in a ratio of 80/20(in dry mass).An innovative method was adopted to drill a 1-m diameter and w10-m deep shaft in order to minimize the rock perturbation at the *** a specific protocol was adopted to install the bentonite mixture together with a careful characterization of the core during construction,VSEAL 1 constitutes the unique in situ sealing test with a well-known initial structural distribution of the pellets and the *** heterogeneities occurred within the experiment during the installation process:a damaged zone developed around the shaft walls due to the interruption of the installation operations caused by COVID19 lockdown in france;a technological gap with a variable thickness between the last pellets layer and the top confining lid and a heterogeneous distribution of the bentonite powder at some layers inducing large inter pellets voids close to the bentonite-rock *** injected water volume,relative humidity,water content and swelling pressure in both radial and axial directions were *** of the results showed that the presence of installation-induced heterogeneities led to the generation of preferential flow paths that influenced the swelling pressure evolution at radial and axial directions.

关键词： Bentonite pellet-powder mixture Heterogeneities Technological gap Seals In situ test

Investigations on the Flow Field in an Unshrouded Pump Impeller Geometry

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Journal of Thermal Science 2012年第2期21卷 136-144页

作者： Sten Sieber friedrich frhlig Saban Caglar Martin Gabi Fchgebiet Strmungsmaschinen Karlsruhe Institute of Technology Germany

Transient CFD simulations are performed to investigate the flow behaviour inside an unshrouded pump using the SAS method. Two blade designs are compared at two different tip clearances and the results are validated by measurements. The detected vortex structure is visualized by the normalized helicity, further discussed regarding its development and behaviour and finally implicated to the efficiency of the two different blade designs.

关键词： unshrouded pump tip clearance helicity