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Application of the fractal theory for evaluating effects of coal comminution by waterjet

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International Journal of Coal science & Technology 2014年第4期1卷 450-455页

作者： Yaqing li Greg Galecki Gul akar sezai sen Yutao Zhang Key Lab of Mining and Disaster Prevention and Control in Western Mine Ministry of EducationXi’an710054China school of Energy science and Engineering Xi’an University of Science and TechnologyXi’an 710054China Department of Mining and Nuclear Engineering Missouri University of Science and TechnologyRollaMO 65401USA Department of Mining Engineering Dokuz Eylul UniversityIzmirTurkey

Comminution of coal to ultrafine sizes by high-pressure waterjet provides a novel method for preparation of coal-water fuels for next generation,near-zero emission electric power *** particle size distribution(PsD)of ground coal is a key parameter in the preparation of slurries as it determines the settling behavior of the particles and viscosity of the coal-water *** are several methods available for representation and evaluation of particle size analysis ***,fractal theory provides a means by which the entire PsD of comminuted materials can be quantified by using of a specific and exact *** this paper,a volume-based fractal model was deduced to characterize the PsD of the coal which is ground in a specially designed comminution *** the size reduction process,the inlet pressures up to 276 MPa were used.

关键词： Coal comminution Fractal theory Particle size distribution Waterjet

Temperature-induced Evolution of Micro-structure and Chain Dynamics in Thermoplastic Polyurethane with Low Hard segment Content as studied by In situ synchrotron sAXs and Time-Domain NMR Experiments

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Chinese Journal of Polymer science 2023年第12期41卷 1902-1911,I0008页

作者： Hong-Ru Wang Victor litvinov Wei Yu kar Wee Eddie Peh Qian-li Yu Yong-Feng Men state Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China school of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China BAsF Polyurethane specialties(China)Co.Ltd. Shanghai 200137China V.lit.Consult Gozewijnstraat 46191 WV Beekthe Netherlands

The microstructural evolution of a thermoplastic polyurethane(TPU)with low hard segment content has been monitored utilizing in situ real-time synchrotron small angle X-ray scattering(sAXs)and time-domain nuclear magnetic resonance(NMR)*** TPU is composed of 23 wt% of[4,4-methylenediphenyl diisocyanate(MDI)]-[1,4-butanediol(BD)]chain segments,which form hard domains,as[polytetrahydrofuran(PTHF)]forming soft *** number and distribution of monomer units in hard blocks is determined by the successive self-nucleation and annealing thermal fractionation *** situ sAXs method reveals heating-induced increase in the spacing of hard and soft domains,while time-domain ^(1)H-NMR characterizes the changes in the phase composition and chain dynamics in these domains.A glassy fraction of short MDI-BD chain segments in hard domains passes through T_(g) above ambient *** higher temperatures,MDI-BD nanocrystals start to *** length distribution of MDI-BD chain segments causes a distribution in crystal sizes and wide melting temperature *** melting is accompanied by the mixing of MDI-BD with PTHF segments in soft domains,and by increase in segmental mobility in these *** 180℃,the TPU melt is homogeneous on the scale above nanometers according to sAXs data.

关键词： Phase separation Thermoplastic polyurethane Melting behavior Time-domain NMR sAXs

Microbiota–gut–brain axis and its therapeutic applications in neurodegenerative diseases

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signal Transduction and Targeted Therapy 2024年第3期9卷 945-997页

作者： Jian sheng Loh Wen Qi Mak li kar stella Tan Chu Xin Ng Hong hao Chan shiau Hueh Yeow Jhi Biau Foo Yong sze Ong Chee Wun How Kooi Yeong Khaw school of Pharmacy Monash University MalaysiaJalan Lagoon Selatan47500 Bandar SunwaySelangorMalaysia school of Pharmacy Faculty of Health&Medical SciencesTaylor’s University1Jalan TaylorsSubang Jaya 47500 SelangorMalaysia Digital Health&Medical Advancements Taylor’s University1Jalan TaylorsSubang Jaya 47500 SelangorMalaysia school of Biosciences Faculty of Health&Medical SciencesTaylor’s University1Jalan TaylorsSubang Jaya 47500 SelangorMalaysia UCL school of Pharmacy University College London29-39 Brunswick SquareLondon WC1N 1AXUK

The human gastrointestinal tract is populated with a diverse microbial *** vast genetic and metabolic potential of the gut microbiome underpins its ubiquity in nearly every aspect of human biology,including health maintenance,development,aging,and *** advent of new sequencing technologies and culture-independent methods has allowed researchers to move beyond correlative studies toward mechanistic explorations to shed light on microbiome–host *** has unveiled the bidirectional communication between the gut microbiome and the central nervous system,referred to as the“microbiota–gut–brain axis”.The microbiota–gut–brain axis represents an important regulator of glial functions,making it an actionable target to ameliorate the development and progression of neurodegenerative *** this review,we discuss the mechanisms of the microbiota–gut–brain axis in neurodegenerative *** the gut microbiome provides essential cues to microglia,astrocytes,and oligodendrocytes,we examine the communications between gut microbiota and these glial cells during healthy states and neurodegenerative ***,we discuss the mechanisms of the microbiota–gut–brain axis in neurodegenerative diseases using a metabolite-centric approach,while also examining the role of gut microbiota-related neurotransmitters and gut ***,we examine the potential of targeting the intestinal barrier,blood–brain barrier,meninges,and peripheral immune system to counteract glial dysfunction in ***,we conclude by assessing the pre-clinical and clinical evidence of probiotics,prebiotics,and fecal microbiota transplantation in neurodegenerative diseases.A thorough comprehension of the microbiota–gut–brain axis will foster the development of effective therapeutic interventions for the management of neurodegenerative diseases.

关键词： degenerative therapeutic diseases

硫化氢燃料电池的无机质子传导膜与MEA制备和性能(英文)

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无机化学学报 2007年第11期23卷 1875-1881页

作者：钟理 Chuang kar 华南理工大学化工与能源学院广州510640 Department of Chemical and Materials Engineering University of AlbertaEdmontonABCanadaT6G 2G6

制备了硫化氢固体氧化物燃料电池的无机质子传导膜和膜-电极-组装(MEA)。用扫描电镜(sEM)和电化学阻抗(EIs)技术表征了无机质子传导膜和MEA的形貌与性能。研究了不同膜厚和掺杂或没有掺杂li2WO4组分的传导膜和MEA的性能。结果表明,与没... 详细信息

制备了硫化氢固体氧化物燃料电池的无机质子传导膜和膜-电极-组装(MEA)。用扫描电镜(sEM)和电化学阻抗(EIs)技术表征了无机质子传导膜和MEA的形貌与性能。研究了不同膜厚和掺杂或没有掺杂li2WO4组分的传导膜和MEA的性能。结果表明,与没有掺杂li2WO4组分制备的MEA相比,掺杂了li2WO4组分制备的MEA的电导提高了一个数量级,掺杂了li2WO4制备的MEA硫化氢燃料电池在操作条件下具有更好的化学稳定性和电化学性能。以Mo-Ni-s为主要成分的复合阳极、0.8mm厚和组成为67wt% li2sO4+8wt% li2WO4+25wt% Al2O3复合材料制备的质子传导膜、NiO为主要组分的复合阴极构成的MEA硫化氢燃料电池,在650、700和750℃时,最大输出功率密度分别达到50、85和130mW·cm-2,最大电流密度分别为200、350和480mA·cm-2。

关键词：膜-电极-组装(MEA) 质子传导膜固体氧化物燃料电池硫化氢

Coastal wetlands in lianyungang,Jiangsu Province,China:probably the most important site globally for the Asian Dowitcher(limnodromus semipalmatus)

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Avian Research 2021年第3期12卷 364-374页

作者： Ziyou Yang Jing li Yongxiang Han Chris J.Hassell kar-sin Katherine Leung David s.Melville Yat-tung Yu lin Zhang Chi-Yeung Choi spoon-Billed sandpiper(shanghai)Environmental Protection Technology Co. Ltd.Shanghai 201100China lianyungang Xugou Primary school Lian-yungang 222042China Global Flyway Network PO Box 3089BroomeWA 6725Australia Hong Kong Waterbirds Ringing Group Mai Po Nature ReserveHong KongChina 1261 Dovedale Road RD 2 WakefieldNelson 7096New Zealand Hong Kong Bird Watching society 7CV Ga Building532 Castle Peak RoadLai Chi KokKowloonHong KongChina school of Environmental science and Engineering Southern University of Science and TechnologyShenzhen 518055China

Background:Despite an increasing number of surveys and a growing interest in birdwatching,the population and distribution of Asian Dowitcher(limnodromus semipalmatus),a species endemic to the East Asian-Australasian and Central Asian Flyways,remains poorly understood,and published information about the species is largely *** boreal spring 2019,over 22,432 Asian Dowitchers were recorded in a coastal wetland at lianyungang,Jiangsu Prov-ince,China,constituting 97.5%of its estimated global ***:In 2019 and 2020,we conducted field surveys at lianyungang to determine the numbers of Asian Dow-itchers using the area during both southward and northward *** also assessed the distribution and abun-dance of Asian Dowitchers elsewhere along the China coast by searching literature and consulting expert ***:The coastal wetlands of lianyungang are the most important stopover site for Asian Dowitchers during both northward and southward migrations;they supported over 90%of the estimated global population during north-ward migration in two consecutive years(May 2019 and 2020).This area also supported at least 15.83%and 28.42%(or 30.74%and 53.51%using modelled estimates)of the global population during southward migration in 2019 and 2020 *** wetlands in the west and north of Bohai Bay also have been important stopover sites for the species since the *** comprehensive,long-term monitoring data are lacking,available evidence sug-gests that the population of the species may have ***:The high concentration of Asian Dowitchers at lianyungang during migration means the species is highly susceptible to human disturbances and natural stochastic *** coastal wetlands of lianyungang should be protected and potentially qualify for inclusion in China’s forthcoming nomination for World Heritage listing of Migratory Bird sanctuaries along the Coast of Yellow sea-Bohai Gulf of China(Phase II)in ***

关键词： lianyungang limnodromus semipalmatus shorebird stopover ecology Yellow sea World Heritage

The effects of medical insurance and patients’ preference on manufacturer encroachment in a pharmaceutical supply chain

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Journal of Management science and Engineering 2022年第2期7卷 243-265页

作者： Yanfei Lan Pingping Lu Chen Pan sarmajit kar Weifeng li College of Management&Economics Tianjin UniversityTianjin300072China College of stastics and Mathematics Huanggang Normal UniversityHuanggang438000China Department of Mathematics National Institute of TechnologyDurgapurWest BengalIndia Academy of Medical Engineering&Translation Medicine Tianjin UniversityTianjin300072China

With the development of e-commerce,manufacturers have opportunities to sell products to consumers through direct channels in addition to independent *** manufacturers’encroachment upon the retailing market of traditional goods has been extensively studied,there is a lack of research on manufacturers’encroachment in a pharmaceutical supply *** paper analyzes a pharmaceutical manufacturer encroachment strategy by taking into account the distinctive features of drugs,in which drug expenses are covered by medical insurance only in the physical channel and patients'channel preference is also *** find that under certain circumstances,the manufacturer encroachment may lead to a win-win outcome for both the manufacturer and the retailer,contradicting the conventional wisdom that the manufacturer's encroachment into retail space is detrimental to the independent ***,the manufacturer is more likely to encroach when the incurred extra cost is sufficiently small,the perceived quality of the drug selling through the direct channel is sufficiently high and the out-of-pocket percentage cost of the drug selling in the physical channel is *** further study the impact of manufacturer encroachment on social welfare and find that the introduction of encroachment decreases the social welfare when patients'perceived quality of the drug obtained through the online store is low and improves the social welfare when the perceived quality exceeds a certain threshold.

关键词： Manufacturer encroachment Drug supply chain Patients preference Game theory

Detecting the non-breeding region and migration route of Whimbrels(Numenius phaeopus rogachevae)in the East Asian–Australasian Flyway

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Avian Research 2022年第1期13卷 72-77页

作者： Fenliang Kuang Wei Wu David li Chris J.Hassell Grace Maglio kar-sin K.Leung Jonathan T.Coleman Chuyu Cheng Pavel s.Tomkovich Zhijun Ma Ministry of Education Key Laboratory for Biodiversity science and Ecological Engineering National Observations and Research Station for Wetland Ecosystems of the Yangtze EstuaryInstitute of Eco-ChongmingSchool of Life SciencesFudan UniversityShanghai200433China school of Resources Environment and Chemistry Chuxiong Normal UniversityChuxiongYunnan675000China shanghai Chongming Dongtan National Nature Reserve Shanghai202183China National Parks Board Singapore718925Singapore Global Flyway Network PO Box 3089BroomeWA6725Australia Australasian Wader studies Group BroomeWA6725Australia Hong Kong Waterbirds Ringing Group Hong Kong999077China Queensland Wader study Group 22 Parker StreetShailer ParkQLD4128Australia Zoological Museum Lomonosov Moscow State UniversityBolshaya Nikitskaya Str.2Moscow125009Russia

Determining the migration routes and connections of migratory birds at the population level helps clarify intraspecific differences in *** subspecies have been recognized in the Whimbrel(Numenius phaeopus)in *** is the most recently described *** breeds in Central siberia,while its non-breeding region and migration routes are still *** tracked the migration of Eurasian Whimbrels captured at three non-breeding sites(Moreton Bay in east coast of Australia,Roebuck Bay in Northwest Australia and sungei Buloh Wetland in singapore)and two migration stopover sites(Chongming Dongtan and Mai Po Wetland in China).We determined the breeding sites and inferred the subspecies of the tagged birds in the East Asian–Australasian Flyway(EAAF)based on the known breeding distribution of each *** the 30 tagged birds,6 and 21 birds bred in the breeding range of *** and variegatus,respectively;one bred in the presumed transition area between the breeding range of *** and rogachevae,and two bred in the region between the breeding range of *** and *** birds that bred in the *** breeding range spent their non-breeding season in the northern sumatra,singapore,East Java and Northwest Australia and mainly stopped over along China's coasts during *** of our birds bred in the exclusive breeding range of the phaeopus *** studies have predicted that rogachevae whimbrels migrate along the Central Asian Flyway and spend the non-breeding season in West India and East *** found that at least some rogachevae whimbrels migrate along the EAAF and spend the non-breeding season in southeast Asia and *** *** is at best sparsely distributed in the EAAF in the west region,or possibly does not occur at all.

关键词： Migratory connectivity Non-breeding area Numenius phaeopus satellite tracking stopover site subspecies

Oriented structural design of MXene electrodes for lithium sulfur catalysis

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Journal of Energy Chemistry 2024年第12期99卷 66-73页

作者： Yu Wang Jiaming li Qinhua Gu Zhilin liu Hengrui Zhang shunri Zheng shichong Xu kar Ban Tan Yaxiao Luo Zhaoliang Yu Haibo li Wenjuan Han Mingzhe Zhang Ming Lu bingsen Zhang state Key Laboratory of superhard Materials College of PhysicsJilin UniversityChangchun 130012JilinChina shenyang National Laboratory for Materials science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education The Joint Laboratory of MXene Materialsjilin Normal UniversityChangchun 130103JilinChina Department of Chemistry.Faculty of science University Putra MalaysiaSerdang 43400SelangorMalaysia school of Optoelectronic science Changchun College of Electronic TechnologyChangchun 130114jilinChina school of Materials science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina school of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai jiao Tong UniversityShanghai 200240China

The lithium-sulfur reaction can contribute to the chemical electrical energy conversion capacity due to the multi-level ion/electron transfer process. However, the appearance of soluble intermediate products prevents efficient electron transfer, making it impossible to achieve stable cycling and capacity contribution. Restricted catalysis provides a solution for inhibiting the shuttle of soluble lithium ***, MXene aerogel with optimized channel utilization is designed as s host according to the polysulfide control strategy of localization, adsorption, and catalysis. With the help of the results of oriented channels, the polysulfide conversion process is optimized, providing a comprehensive scheme for inhibiting the shuttle effect. lithium sulfur catalytic batteries have achieved high capacity and stable *** system provides a comprehensive solution for lithium sulfur reaction catalysis and a new perspective for the functional application of MXene based lithium sulfur batteries.

关键词： MXene Aerogel lithium-sulfur battery Catalyst

The GhMAX2 gene regulates plant growth and fiber development in cotton

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Journal of Integrative Agriculture 2022年第6期21卷 1563-1575页

作者： HE Peng ZHANG Hui-zhi ZHANG li JIANG bin XIAO Guang-hui YU Jia-ning College of life sciences Shaanxi Normal UniversityXi’an 710119P.R.China National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China Shaanxi Normal UniversityXi’an 710119P.R.China

strigolactones(sLs)are a new type of plant endogenous hormones that have been found to regulate plant growth and *** present,some genes related to the biosynthesis and signaling pathway of sLs have been isolated in plants such as Arabidopsis thaliana,Pisum sativum and Oryza ***,the signaling pathway and specific mechanism of sLs in cotton remain *** this study,we identified the sLs signaling gene GhMAX2 and demonstrated its function in plant growth and architecture in Gossypium *** analysis showed that GhMAX2 mainly consists of anα-helix and a random coil and includes a large number of leucine-rich ***2 was highly expressed in root,stem,flower,and fibers at 20 days post-anthesis(DPA).GhMAX2 promoter-drivenβ-glucuronidase expression was present exclusively in the root,main inflorescence,flower,and *** localization showed that GhMAX2 is targeted to the *** expressed GhMAX2 can rescue the phenotype of Arabidopsis max2-1 mutant,indicating that the function of MAX2 is highly conserved between *** and *** *** addition,the knockdown expression of GhMAX2 in cotton resulted in significantly reduced plant height,slow growth,short internodes,and reduced fiber *** findings indicate that GhMAX2 probably contributes to plant growth,architecture and fiber elongation in *** study reveals insights into the roles of GhMAX2-mediated sL/kar signaling in cotton and provides a valuable foundation for the cultivation of cotton plants in the future.

关键词： strigolactones MAX2 cotton hormone signaling fiber