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Encroachment drives facilitation at alpine shrublines

Forest Ecosystems 2024年第1期11卷 62-72页

作者： Yafeng Wang Eryuan Liang j.j.lio Camarero College of Ecology and Environment Nanjing Forestry UniversityNanjing210037China State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing100101China Instituto Pirenaico de Ecología(IPE-CSIC) Zaragoza50080Spain

Ongoing encroachment is driving recent alpine shrubline dynamics globally,but the role of shrub-shrub interactions in shaping shrublines and their relationships with stem density changes remain poorly ***,the size and age of shrubs from 26 Salix shrubline populations along a 900-km latitudinal gradient(30°-38°N)were measured and mapped across the eastern Tibetan *** pattern analyses were used to quantify the spatial distribution patterns of j.veniles and adults,and to assess spatial associations between *** intensity of univariate and bivariate spatial patterns was related to biotic and abiotic *** mark correlation functions with a quantitative mark(shrub height,basal stem diameter,crown width)were also employed to investigate the spatial relationships between shrub traits of j.veniles and *** equation models were used to explore the relationships among conspecific interactions,patterns,shrub traits and recruitment dynamics under climate *** shrublines showed clustered patterns,suggesting the existence of conspecific *** patterns of j.veniles and conspecific interactions(potentially facilitation)tended to intensify with increasing soil moisture *** warming before 2010 triggered positive effects on population interactions and spatial patterns via increased shrub ***,summer warming after2010 triggered negative effects on interactions through reduced shrub ***,shrub recruitment shifts under rapid climate change could impact spatial patterns,alter conspecific interactions and modify the direction and degree of shrublines responses to *** changes would have profound implications for the stability of alpine woody ecosystems.

关键词： Alpine shrubline Positive interactions Facilitation Spatial clustering Point pattern analyses

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Upper and Lower Bounds of Table Sums

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Algebra Colloquium 2021年第4期28卷 555-560页

作者： Xiaoyou Chen mark L.lewis Hung P.Tong-Viet School of Sciences Henan University of TechnologyZhengzhou 450001China Department of Mathematical Sciences Kent State UniversityKentOH 44242USA Department of Mathematical Sciences Binghamton University 4400 Vestal Parkway EastBinghamtonNY 13902-6000USA

For a group G,we produce upper and lower bounds for the sum of the entries of the Brauer character table of G and the proj.ctive indecomposable character table of *** G is aπ-separable group,we show that the sum of the entries in the table of Isaacs'partial characters is a real number,and we obtain upper and lower bounds for this sum.

关键词： character table Brauer characters proj.ctive indecomposable characters π-paxtial characters

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Assessment of oxide nanoparticle stability in liquid phase transmission electron microscopy

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Nano Research 2019年第9期12卷 2355-2363页

作者： mark j. Meij.rink Krij. P. de j.ng j.vana Zecevic Inorganic Chemistry and Catalysis Debye Institute of Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CG UtrechtThe Netherlands

Studying liquid phase nanoscale dynamic processes of oxide nanoparticles is of considerable interest to a wide variety of *** developed liquid phase transmission electron microscopy(LP-TEM)is a promising technique,but destabilization of oxides by solid-liquid?electron interactions remains an important *** this work we present a methodology to assess LP-TEM oxide stability in an aqueous phase,by subj.cti ng several oxides of tech no logical importa nee to a controlled electr on dose in *** show a correlati on based on the Gibbs free en ergy of oxide hydrati on that can be used to assess the stability of oxides and dem on strate the existenee of several remarkably stable oxides,with no observable structural changes after one hour of electron beam irradiation in *** such destabilization phenomena combined with the identification of stable oxides allows for designing LP-TEM experiments free from adverse beam effects and thus in vestigati ons of numerous releva ntnano scale processes in water.

关键词： liquid phase transmission electron microscopy(LP-TEM) transmission electron microscopy electron beam damage metal oxide nano materials oxide stability

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Treatment and prevention of epilepsy in onchocerciasis-endemic areas is urgently needed

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Infectious Diseases of Poverty 2024年第1期13卷 85-89页

作者： Robert Colebunders j.seph Nelson Siewe Fodj. Olivia Kamoen Luis-j.rge Amaral Amber Hadermann Chiara Trevisan mark j.Taylor j.lia Gauglitz Achim Hoerauf Yasuaki Sato Katj. Polman Maria-Gloria Basanez Dan Bhwana Thomson Lakwo Gasim Abd-Elfarag Sebastien D.Pion Global Health Institute University of AntwerpAntwerpBelgium Department of Neurology Heilig Hart ZiekenhuisLierBelgium Department of Public Health Institute of Tropical MedicineAntwerpBelgium Liverpool School of Tropical Medicine LiverpoolUK Department of Computer Science University of AntwerpAntwerpBelgium Institute of Medical Microbiology Immunology and ParasitologyUniversity Hospital BonnBonnGermany German Center for Infection Research(DZIF) Partner Site Bonn-CologneBonnGermany School of Global Humanities and Social Sciences Nagasaki UniversityNagasakiJapan MRC Centre for Global Infectious Disease Analysis and London Centre for Neglected TropicalDisease Research Department of Infectious Disease EpidemiologySchool of Public HealthImperial College LondonLondonUK National Institute for Medical Research TangaTanzania Vector Control Division Ministry of HealthKampalaUganda School of Public Health University of JubaJubaSouth Sudan Access for Humanity JubaSouth Sudan French National Research Institute for Sustainable Development MontpellierFrance

Background There is increasing epidemiological evidence supporting the association between onchocerciasis and seizures, reinforcing the concept of onchocerciasis-associated epilepsy (OAE). The aim of this paper is to provide an update on the new knowledge about OAE and to propose recommendations to the World Health Organization how to address this public health *** text During the 2nd International Workshop on OAE held on 19-21 September, 2023, in Antwerp, Belgium, participants recognised OAE as a substantial yet neglected public health problem, particularly in areas of sub-Saharan Africa where onchocerciasis remains hyperendemic. Evidence from prospective population-based studies suggest that strengthening onchocerciasis elimination efforts leads to a significant reduction of OAE incidence. There is a need to validate an OAE case definition to estimate the burden of disease and identify onchocerciasis-endemic areas requiring intensification of onchocerciasis elimination programmes and integration of epilepsy care. It is expected that raising awareness about OAE will boost the population uptake of ivermectin. The implementation of a community-based epilepsy treatment programme offering free anti-seizure medications (ASMs) has shown high effectiveness in reducing the frequency of seizures and improving the overall quality of life of people with *** To reduce OAE burden, enhanced collaboration between onchocerciasis and mental health programmes at community, national, and international levels is required. Urgent efforts are needed to ensure the uninterrupted provision of free ASMs in onchocerciasis-endemic areas. Furthermore, OAE should be included in the quantification of the onchocerciasis disease burden.

关键词： Onchocerciasis Morbidity Burden of disease Prevention Ivermectin Epilepsy Nodding syndrome Treatment Children Policy

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Sax's Dangerous Properties of Industrial Materials 11th;editon

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2004年

作者： Richard j. lewis Sr.

ISBN: (数字)9780471701347

ISBN: (纸本)9780471476627

Since its inception in the early 1950's, Sax's Dangerous Properties of Industrial Materials has become the primary source for those who need to evaluate the hazardous potential of substances used in commerce. Sax's is the only reference that combines data on toxicology, flammability, reactivity, explosive potential, and regularity information for over 28,000 substances. Each entry includes the following data (where available): DPIM code Hazard rating Entry name CAS number DOT number Molecular formula Line structural formula Description of the material and physical properties of the chemical Synonyms Toxicology data with references for reports of primary skin and eye irritation, mutation, reproductive, carcinogenic, and acute toxic dose data Reviews of Sax's Dangerous Properties of Industrial Materials: "This publication is a tour de force in its field: the presentation and structuring of both the hardback and electronic versions are first class. It is highly recommended as the best reference work for anyone wishing to access comprehensive information on the dangerous properties of industrial materials in the workplace." -- Bioseparation "...any practicing chemical engineer would be grateful for access..." -- Process Safety & Environmental Protection "...no other source can match the breadth and depth found in this title." -- Fire "This very handy reference guide provides health and safety data, regulatory standards, toxicity and carcinogenicity information, and physical property profiles for over 26,000 potentially hazardous chemical substances..." -- j.urnal of the American Chemical Society "Sax's remains the authoritative text for those who need to evaluate hazards of substances used in industry...a worthwhile resource for libraries, colleges, and union regional and national offices..." -- Hazards

关键词： Hazardous substancesHandbooks manuals etc.

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Groups with One or Two Super-Brauer Character Theories

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Acta Mathematica Sinica,English Series 2020年第4期36卷 379-394页

作者： Xiao You CHEN mark Llewis College of Science Henan University of TechnologyZhengzhou 450001P.R.China Department of Mathematical Sciences Kent State UniversityKent 44242USA

A super-Brauer character theory of a group G and a prime p is a pair consisting of a partition of the irreducible p-Brauer characters and a partition of the p-regular elements of G that satisfy certain *** classify the groups and primes that have exactly one super-Brauer character *** discuss the groups with exactly two super-Brauer character theories.

关键词： Super character theory super-Brauer character theory Brauer characters

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Differential effects of short term winter thermal stress on diapausing tiger swallowtail butterflies （Papilio spp.）

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Insect Science 2012年第3期19卷 277-285页

作者： j. mark Scriber Emily Maher Matthew L. Aardema Department of Entomology Michigan State University East Lansing MI McGuire Center for Lepidoptera and Biodiversity Florida Museum of Natural History University of Florida Gainesville FL Department of Ecology and Evolutionary Biology Princeton University Princeton N J USA

It is generally thought that insects inhabiting lower latitudes are more severely impacted by changes in their thermal environment than are high latitude species. This is attributed to the wider range of temperatures to which high-latitude species are exposed. By contrast, low-latitude species have typically evolved in more thermally stable environments with a narrower range of temperature variation. However, deviation from this pattern can occur and here we report that under variable winter conditions a higher latitude species may be more sensitive to thermal variation than its lower latitude sister species. Using split broods, we examined the survival and adult emergence success of diapausing pupae of Papilio canadensis and P. glaucus, as well as a unique, recombinant hybrid population （＂late-flight＂） to short periods of mid-winter cold and heat stress. Our results indicate that the higher latitude, univoltine populations （P. canadensis and late-flights） exhibit lower pupal survival than the lower latitude, facultative diapauser （P. glaucus） for all mid-winter thermal stress treatments, both high and low. Size differences alone do not appear to account for the observed differences in survival or metabolic costs in these three pheno- types, as late-flight individuals are similar in size to R glaucus. We attribute the observed differences in survival and weight loss to potential metabolic differences and variation in the intensity of diapause, in addition to divergent adaptation to winter precipitation levels （e.g. snow cover） and the influences this may have on microhabitat temperature moderation.

关键词： climate change developmental threshold incipient hybrid species metabolic cost Papilionidae post-diapause delays thermal stress

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In Vivo and In Vitro Degradation Behavior of Magnesium Alloys as Biomaterials

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j.urnal of Materials Science & Technology 2012年第3期28卷 261-267页

作者： Dingchuan Xue Yeoheung Yun Zongqing Tan Zhongyun Dong mark j. Schulz Department of Chemical and Materials Engineering University of Cincinnati OH 45221 USA Department of Bioengineering North Carolina A ＆ T State University Greensboro NC 27411 USA Department of Internal Medicine University of Cincinnati OH 45221 USA Department of Mechanical Engineering University of Cincinnati OH 45221 USA

The corrosion behavior of pure Mg,AZ31,and AZ91D were evaluated in various in vitro and in vivo environments to investigate the potential application of these metals as biodegradable implant *** polarization tests and immersion tests were performed in different simulated body solutions,such as distilled（DI） water,simulated body fluid（SBF） and phosphate buffered solution（PBS）.Mg/Mg alloys were also implanted in different places in a mouse for in vivo weight loss and biocompatibility *** in vivo subcutis bio-corrosion rate was lower than the corrosion rate for all of the in vitro simulated corrosive *** Mg/Mg alloys were biocompatible based on histology results for the liver,heart,kidney,skin and lung of the mouse during the two months *** microscopy and scanning electron microscopy were carried out to investigate the morphology and topography of Mg/Mg alloys after immersion testing and implantation to understand the corrosion mechanisms.

关键词： Mg/Mg alloys In vitro/in vivo testing Bio-degradation rate Biocompatibility

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美股科技双杰崛起

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商业周刊（中文版） 2024年第5期 48-49页

作者： Eric j.Weiner j.ran Wittenstein mark Gurman 孟洁冰(译) 不详

十多年来,少数几家科技巨头推动美国股市一路向前,带来了超高速增长的希望。你熟知这些家喻户晓的名字:比如谷歌的母公司Alphabet、亚马逊公司(***)、苹果公司、Facebook的母公司Meta、微软公司和特斯拉公司。这些公司的名号组成了各种... 详细信息

十多年来,少数几家科技巨头推动美国股市一路向前,带来了超高速增长的希望。你熟知这些家喻户晓的名字:比如谷歌的母公司Alphabet、亚马逊公司(***)、苹果公司、Facebook的母公司Meta、微软公司和特斯拉公司。这些公司的名号组成了各种首字母缩略词——FANG、FAANG、MAMAA——几乎成为每个投资组合的主要配置。

关键词：投资组合母公司 Amazon 苹果公司亚马逊公司美国股市 .com

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Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

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Nano Research 2014年第1期7卷 1-62页

作者： mark j. Armstrong Colm O'Dwyer William j. Macklin j.stin. D. Holmes Materials Chemistry & Analysis Group Department of Chemistry and the Tyndall National Institute University College Cork Cork Ireland Applied Nanoscience Group Department of Chemistry and the Tyndall National Institute University College Cork Cork Ireland Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) Trinity College Dublin Dublin 2 Ireland Nexeon Limited Abingdon Oxfordshire UK.

The performance of the lithium-ion cell is heavily dependent on the ability of the host electrodes to accommodate and release Li＋ ions from the local structure. While the choice of electrode materials may define parameters such as cell potential and capacity, the process of intercalation may be physically limited by the rate of solid-state Li＋ diffusion. Increased diffusion rates in lithium-ion electrodes may be achieved through a reduction in the diffusion path, accomplished by a scaling of the respective electrode dimensions. In addition, some electrodes may undergo large volume changes associated with charging and discharging, the strain of which, may be better accommodated through nanostructuring. Failure of the host to accommodate such volume changes may lead to pulverisation of the local structure and a rapid loss of capacity. In this review article, we seek to highlight a number of significant gains in the development of nanostructured lithium-ion battery architectures （both anode and cathode）, as drivers of potential next-generation electrochemical energy storage devices.

关键词： lithium ion batteries nanostructuring anodes cathodes

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