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Non-thermal plasma treatment as a new biotechnology in relation to seeds, dry fruits,and grains

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Plasma Science and Technology 2018年第4期20卷 78-85页

作者： Bozena SERA michal SERY Comenius University in Bratislava Faculty of Natural SciencesDepartment of Landscape Ecologyllkovicova 6Bratislava 842 48Slovakia University of South Bohemia Faculty of EducationDepartment of BiologyJeronymova 10Ceske BudejoviceCzechia University of South Bohemia Faculty of EducationDepartment of Applied Physics and TechnicsJeronymova 10Ceske BudejoviceCzechia

Non-thermal plasma (NTP) technology offers wide potential use in the food technology, the same as in the unconventional agriculture. Some seeds, dry fruits, grains and their sprouts gain popularity in the culinary industry as 'raw seeds'. This review paper draws the current research and trends in NTP pre-treatment of selected seeds/fruits that are useable as 'raw seeds'. The main applications are connected with activation of seed germination, early growth of seedlings, microbial inactivation of seed/fruit surface, and possibility of increasing quantity of biological active compounds in sprouting seeds. The paper presents a list of plant species that are able to be used as 'raw seed' including current information about main type of NTP treatment implemented.

关键词： biotechnology early growth plasma technology low-pressure discharge microbiological inactivation seed modification

On the design and selection of vehicle coordination policies for underground mine production ramps

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International Journal of Mining Science and Technology 2016年第4期26卷 623-627页

作者： michal Pasternak Joshua A.Marshall Mining Systems Laboratory The Robert M.Buchan Department of MiningQueen's University

Traffic management in underground mines,especially on production ramps,is a difficult problem to optimize and *** operations use one of a few common policies;e.g.,the so-called ‘‘lock-out" and‘‘loaded-vehicle-priority" *** work presented in this paper uses discrete-event simulation to study the efficiency of multiple *** on simulation results,an improvement to the common lock-out policy is *** new policy utilizes the rules of the lock-out policy but integrates an option that allows a group of vehicles to be given temporary priority in a certain direction of *** results are provided and,based on these,a systematic technique for ramp design that aims to optimize the efficiency of underground mine ramp traffic flow is described.

关键词：矿山生产协调策略车辆设计坡道离散事件仿真地下矿山交通管理

Does the grasshopper Chorthippus brunneus adapt to metal polluted habitats？ A study of glutathione-dependent enzymes in grasshopper nymphs

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Insect Science 2009年第1期16卷 33-42页

作者： Maria Augustyniak Agnieszka Babczynska michal Augustyniak Department of Animal Physiology and Ecotoxicology University of Silesia Bankowa 9 40-007 Katowice Faculty of Earth Sciences University of Silesia Bedzinska 60 PL 41-200 Sosnowiec Poland

Glutathione contents and activity ofglutathione-dependent enzymes in the body of insects inhabiting polluted areas depend on toxin kind, concentration and exposure time. Enzymatic response may be modified by gender, age, developmental stage and state of nutrition. Also, chronic exposure to metals in the environment may cause the selection of individuals resistant to some environmental toxins. To assess the degree of adaptation of Chorthippus brunneus to metal-polluted habitats, we measured glutathione contents and the activity of selected glutathione-dependent enzymes in the offspring of aging mothers which differed in time and intensity of exposure to metals in their habitats. We tested whether differences represent temporal shifts in tolerance range or were genetically preserved and inherited by future generations. We investigated insects from three populations. Two live in heavily metal-burdened areas, exposed to metals for 170 （Szopienice） or 50 years （Olkusz） and the third inhabits an unpolluted reference site （Pilica）. The most important findings were age-by-site interactions for all biochemical analyses. Nymphs from Szopienice had lower glutathione contents and lower glutathione-dependent enzyme activity in comparison with nymphs from the reference site. This was especially distinct in nymphs hatched from eggs laid by young females. The offspring of aging females from Olkusz, in terms of glutathione contents and glutathione reductase activities, revealed similar patterns to those from the reference site. For the remaining parameters, enzyme activity patterns in nymphs from Olkusz were similar to those of nymphs from Szopienice.

关键词： catalase diapause glutathione glutathione-dependent enzymes grasshoppers,heavy metals

Transversal Instability for the Thermodiffusive Reaction-Diffusion System

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Chinese Annals of Mathematics,Series B 2015年第5期36卷 871-882页

作者： michal KOWALCZYK Benoit PERTHAME Nicolas VAUCHELET Departamento de Ingenieria Matematica and Centro de Modelamiento Matem'atico(UMI CNRS 2807) Universidad de Chile Sorbonne Universités UPMC Univ Paris 06UMR 7598Laboratoire Jacques-Louis LionsF-75005ParisFrance CNRS UMR 7598Laboratoire Jacques-Louis LionsF-75005ParisFrance INRIA-Paris-Rocquencourt EPC MAMBADomaine de VoluceauBP10578153 Le Chesnay CedexFrance

The propagation of unstable interfaces is at the origin of remarkable patterns that are observed in various areas of science as chemical reactions, phase transitions, and growth of bacterial colonies. Since a scalar equation generates usually stable waves, the simplest mathematical description relies on two-by-two reaction-diffusion systems. The authors' interest is the extension of the Fisher/KPP equation to a two-species reaction which represents reactant concentration and temperature when used for flame propagation,and bacterial population and nutrient concentration when used in *** authors study circumstances in which instabilities can occur and in particular the effect of dimension. It is observed numerically that spherical waves can be unstable depending on the coefficients. A simpler mathematical framework is to study transversal instability, which means a one-dimensional wave propagating in two space ***, explicit analytical formulas give explicitely the range of paramaters for instability.

关键词： Traveling waves Stability analysis Reaction-diffusion equation Thermodiffusive system

Passive Seismic Structure Imaging of a Coal Mine by Ambient Noise Seismic Interferometry on a Dense Array

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 37-39页

作者： GU Ning michal CHAMARCZUK GAO Ji michal MALINOWSKI ZHANG Haijiang Laboratory of Seismology and Physics of Earth’s Interior School of Earth and Space ScienceUniversity of Science and Technology of ChinaHefei 230026China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China Institute of Geophysics Polish Academy of Science Warszawa 01-452Poland

Active source seismic method is generally used to image subsurface structures for resource exploration,including oil,gas and *** it can provide highresolution subsurface structures,due to some economic and environmental restrictions,it is not suitable in some *** recent 20 years,passive seismic survey based on ambient noise seismic interferometry(ANSI)has started to be widely used in imaging subsurface *** comparison,ANSI does not need active sources and can image subsurface structures at different depths as a lowcost alternative to active seismic exploration.

关键词： passive seismic imaging ambient noise interferometry coal mine body wave

What do we know about biological nitrogen fixation in insects? Evidence and implications for the insect and the ecosystem

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Insect Science 2020年第3期27卷 392-403页

作者： Nitsan Bar-Shmuel Adi Behar michal Segoli Mitrani Department of Desert Ecology Jacob Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevSede Boqer CampusIsrael Kimron Veterinary Institute Department of ParasitologyBet DaganIsrael

Many insects feed on a low‐nitrogen diet,and the origin of their nitrogen supply is poorly *** has been hypothesized that some insects rely on nitrogen‐fixing bacteria(diazotrophs)to supplement their *** fixation by diazotrophs has been extensively studied and convincingly demonstrated in termites,while evidence for the occurrence and role of nitrogen fixation in the diet of other insects is less ***,we summarize the methods to detect nitrogen fixation in insects and review the available evidence for its occurrence(focusing on insects other than termites).We distinguish between three aspects of nitrogen fixation investigations:(i)detecting the presence of potential diazotrophs;(ii)detecting the activity of the nitrogen‐fixing enzyme;and(iii)detecting the assimilation of fixed nitrogen into the insect *** show that although evidence from investigations of the first aspect reveals ample opportunities for interactions with potential diazotrophs in a variety of insects,demonstrations of actual biological nitrogen fixation and the assimilation of fixed nitrogen are restricted to very few insect groups,including wood‐feeding beetles,fruit flies,leafcutter ants,and a wood *** then discuss potential implications for the insect's fitness and for the ecosystem as a *** suggest that combining these multiple approaches is crucial for the study of nitrogen fixation in insects,and argue that further demonstrations are desperately needed in order to determine the relative importance of diazotrophs for insect diet and fitness,as well as to evaluate their overall impact on the ecosystem.

关键词： biological nitrogen fixation diazotrophs gut microbiome insect diet

Spin-preserving chiral photonic crystal mirror

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Light(Science & Applications) 2020年第1期9卷 1787-1798页

作者： Behrooz Semnani Jeremy Flannery Rubayet Al Maruf michal Bajcsy Institute for Quantum Computing(IQC) University of WaterlooWaterloo N2L3G1 ONCanada Department of Electrical&Computer Engineering University of WaterlooWaterloo N2L3G1 ONCanada Department of Physics and Astronomy University of WaterlooWaterloo N2L3G1 ONCanada

Chirality refers to a geometric phenomenon in which objects are not superimposable on their mirror *** made of nanoscale chiral elements can exhibit chiroptical effects,such as dichroism for left-and right-handed circularly polarized light,which makes these structures highly suitable for applications ranging from quantum information processing and quantum optics to circular dichroism spectroscopy and molecular *** the same time,strong chiroptical effects have been challenging to achieve even in synthetic optical media,and chiroptical effects for light with normal incidence have been speculated to be prohibited in thin,lossless quasi-two-dimensional ***,we report an experimental realization of a giant chiroptical effect in a thin monolithic photonic crystal *** conventional mirrors,our mirror selectively reflects only one spin state of light while preserving its handedness,with a near-unity level of circular *** operational principle of the photonic crystal mirror relies on guided-mode resonance(GMR)with a simultaneous excitation of leaky transverse electric(TE-like)and transverse magnetic(TM-like)Bloch modes in the photonic crystal *** modes are not reliant on the suppression of radiative losses through long-range destructive interference,and even small areas of the photonic crystal exhibit robust circular *** its simplicity,the mirror strongly outperforms earlier reported structures and,contrary to a prevailing notion,demonstrates that near-unity reflectivity contrast for opposite helicities is achievable in a quasi-two-dimensional structure.

关键词： mirror crystal circular

Links Between HX-Groups and Hypergroups

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Algebra Colloquium 2021年第3期28卷 441-452页

作者： Irina Cristea michal Novák Babatunde Oluwaseun Onasanya Centre for Information Technologies and Applied Mathematics University of Nova Gorica Slovenia Faculty of Electrical Engineering and Communication Brno University of Technology Czech Republic Key Laboratory of Intelligent Information Processing and Control of Chongqing Municipal Institutions of Higher Education Chongqing Three Gorges University Chongqing 404000China Department of Mathematics University of IbadanNigeria

The concept of an HX-group is an upgrade of the concept of a group,in which a new operation is defined on the family of non-empty subsets of a *** this new support set together with the new operation is a group,then we call it an *** the other hand,a hyperoperation is a mapping having the same codomain as the operation of an HX-group,i.e.,the family of non-empty subsets of the initial set,but a different domain-the set *** could be(and was indeed)a source of confusion,which is clarified in this ***,HX-groups naturally lead to constructions of *** links between these two algebraic concepts are presented,with the aim of reviving the old notion of an HX-group in the current research on algebraic *** of such existing links and one newly established link are also discussed.

关键词： HX-group hyperstructure theory Chinese hypergroupoid EL-hyperstructure power set

NODAL O(h^4)-SUPERCONVERGENCE IN 3D BY AVERAGING PIECEWISE LINEAR,BILINEAR,AND TRILINEAR FE APPROXIMATIONS

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Journal of Computational Mathematics 2010年第1期28卷 1-10页

作者： Antti Hannukainen Sergey Korotov michal Krízek Institute of Mathematics Helsinki University of Technology Department of Mathematics Tampere University of Technology Institute of Mathematics Academy of Sciences

We construct and analyse a nodal O（h^4）-superconvergent FE scheme for approximating the Poisson equation with homogeneous boundary conditions in three-dimensional domains by means of piecewise trilinear functions. The scheme is based on averaging the equations that arise from FE approximations on uniform cubic, tetrahedral, and prismatic partitions. This approach presents a three-dimensional generalization of a two-dimensional averaging of linear and bilinear elements which also exhibits nodal O（h^4）-superconvergence （ultracon- vergence）. The obtained superconvergence result is illustrated by two numerical examples.

关键词： Higher order error estimates Tetrahedral and prismatic elements Supercon-vergence Averaging operators.