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国外电力电子技术 1989年第3期 1-3页

作者： les.,$G 陈力才

Physicochemical Parameters of Soils in the Poura Gold District:Mouhoun Sub-basin in Burkina Faso,West Africa

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Journal of Environmental Science and Engineering(B) 2024年第4期13卷 159-176页

作者： Adama Yameogo Nicolas Kagambega Fidèles.Kabore Yacouba Konate Mining Engineering Department Higher School of EngineeringYembila Abdoulaye TOGUYENI University(UYAT)Fada N’GourmaBurkina FasoBP 54 Fada N’GourmaBurkina Faso Geosciences and Environment Laboratory(LaGE) Department of Earth SciencesJoseph KI-ZERBO University(UJKZ)OuagadougouBurkina Faso03 BP 7021 Ouagadougou 03Burkina Faso Department of Science and Technology Norbert ZONGO University(UNZ)KoudougouBurkina FasoBP 376 KoudougouBurkina Faso Water Laboratory Hydro-System and Agriculture(LEHSA)International Institute of Water and Environmental Engineering(2iE)OuagadougouBurkina Faso01 BP 594 Ouagadougou 01Burkina Faso

The physicochemical parameters of the soils made it possible to assess their fertility and pollution around the gold district of *** 3-fraction granulometry indicates a dominance of sandy soils with a silty-sandy *** OM(Organic Matter)content is les. than 1%,like most soils in Burkina *** characterization of the fertility of the 26 composite soil samples.indicates that 96.15%are of average *** pollution assessment indicates that the measured pH values are between 5.5 and 8,therefore in accordance with the local reference standards in force,while the determination of the ratio of Al on the exchangeable bases and the low phosphorus contents express a very high aluminium *** electrical conductivities measured vary from 17.5 to 252μS/cm,with a threshold limit of 2μS/cm,expressing significant soil *** the Pearson correlation matrix and the PC(Principal Component)analysis,the causes of pollution are attributable to the high contents of Al and exchangeable bases,linked to agricultural and mining *** analysis of the geological and pedological context indicates that the origin of Al and the exchangeable bases is natural,therefore pedo-geogenic,attributable to the destabilization of feldspars,ferromagnesian minerals and carbonates under supergene alteration.

关键词： Soils fertility pollution salinization Burkina Faso

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机构创新设计实验及CAI方法探讨

西安建筑科技大学学报（社会科学版） 2004年第1期23卷 73-74,78页

作者：王润虎同志学刘丽燕西安建筑科技大学机电工程学院陕西西安710055

根据机械设计基础实验课程改革发展的要求 ,如何更新实验内容 ,进行实验教学改革、积极开发“机构创新设计实验”及利用计算机辅助实验教学已成为实验教学工作者的一项重要课题。

关键词：实验教学改革机构创新设计电脑辅助教学

From liver to hormones:The endocrine consequences of cirrhosis

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World Journal of Gastroenterology 2024年第9期30卷 1073-1095页

作者： Juan Eduardo Quiroz-Aldave Elman Rolando Gamarra-Osorio María del Carmen Durand-Vásquez Luciana del Pilar Rafael-Robles.Jhean Gabriel Gonzáles.Yovera María Alejandra Quispe-Flores Luis Alberto Concepción-Urteaga Alejandro Román-González José Paz-Ibarra Marcio José Concepción-Zavaleta Non-communicable Diseases Endocrinology Research LineHospital de Apoyo ChepénChepén 13871Peru Department of Endocrinology Hospital Víctor Lazarte EchegarayTrujillo 13006Peru Department of Endocrinology Clínica Javier PradoLima 15046Peru Department of Gastroenterology Hospital Nacional Guillermo Almenara IrigoyénLima 15018Peru Department of Endocrinology Hospital de Emergencias GrauLima 15001Peru Internal Medicine Hospital Regional Docente de TrujilloTrujillo 13011Peru Department of Endocrinology Hospital Universitario de San Vicente FundaciónMedellin 050010Colombia Internal Medicine Universidad de AntioquiaMedellín 050010Colombia School of Medicine Universidad Nacional Mayor de San MarcosLima 15081Peru Department of Endocrinology Hospital Nacional Edgardo Rebagliati MartinsLima 15072Peru Carrera de Medicina Humana Universidad Científica del SurLima 15067Peru

Hepatocrinology explores the intricate relationship between liver function and the endocrine *** liver diseases such as liver cirrhosis can cause endocrine disorders due to toxin accumulation and protein synthesis *** its importance,assessing endocrine issues in cirrhotic patients is frequently *** article provides a comprehensive review of the epidemiology,pathophysiology,diagnosis,and treatment of endocrine disturbances in liver *** review was conducted using the PubMed/Medline,EMBASE,and Scielo databases,encompassing 172 *** cirrhosis is associated with endocrine disturbances,including diabetes,hypoglycemia,sarcopenia,thyroid dysfunction,hypogonadotropic hypogonadism,bone disease,adrenal insufficiency,growth hormone dysfunction,and secondary *** optimal tools for diagnosing diabetes and detecting hypoglycemia are the oral glucose tolerance test and continuous glucose monitoring system,*** can be assessed through imaging and functional tests,while other endocrine disorders are evaluated using hormonal assays and imaging *** options include metformin,glucagon-like peptide-1 analogs,sodium-glucose co-transporter-2 inhibitors,and insulin,which are effective and safe for diabetes *** standards are followed for managing hypoglycemia,and hormone replacement therapy is often necessary for other endocrine *** transplantation can address some of these problems.

关键词： Diabetes mellitus Hypoglycemia Thyroid diseases Hypogonadism Metabolic bone diseases Liver cirrhosis

What determines irrigation efficiency when farmers face extreme weather events? A field survey of the major wheat producing regions in China

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Journal of Integrative Agriculture 2018年第8期17卷 1888-1899页

作者： SONG Chun-xiao les.Oxley MA Heng-yun College of Economics and Management Henan Agricultural University Department of Economics and Finance University of Waikato

Water availability is a major constraint on grain production in China, therefore, improving irrigation efficiency is particularly important when agriculture faces extreme weather events. This paper first calculates irrigation efficiency with a translog stochastic frontier production function and then investigates what happens when extreme weather events occur via a Tobit model. The estimated results reveal several important features of irrigation practices: i) irrigation efficiency is lower when extreme weather events occur; ii) large variations in irrigation efficiency occur across irrigation facilities; iii) the farm plots exhibit an extreme distribution across efficiency levels; and iv) water-saving techniques, technology adoption, and the maintenance of farmers’ economic resilience are major determinants of irrigation efficiency. Based on these results we propose the following recommendations: i) farmers should balance crop yield and water use; undertake relevant training programs and adopt water-saving techniques; ii) local governments and researchers should help farmers to find the optimal level of irrigation water use based on their own circumstances and provide better water-saving techniques and training programs rather than simply encouraging farmers to invest in irrigation facilities in the most extreme weather years; and iii) the income level of farm households should be increased so as to improve their resilience to natural disasters.

关键词： irrigation efficiency determinants irrigation facilities water-saving techniques extreme weather events

Effects of excluding bottom-disturbing mobile fishing gear on abundance and biomass of groundfishes in the Stellwagen Bank National Marine Sanctuary,USA

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Current Zoology 2010年第1期56卷 134-143页

作者： Briana K.BROWN Elizabeth SOULE les.KAUFMAN Biology Department Boston University

The Stellwagen Bank National Marine Sanctuary （southern Gulf of Maine, northwest Atlantic） is partially overlapped by the Western Gulf of Maine Closure Area （WGMCA）. This is a region in which mobile, bottom-disturbing fishing gear has been banned by the New England Fishery Management Council to facilitate the rebuilding of depleted gronndfish populations. We assessed the effects and effectiveness of the WGMCA on groundfish assemblages using habitat-stratified （gravel, sand, mixed benthic habitats） sampling by means of a commercial trawler, inside and outside of the WGMCA. Sampling occurred over three mouth-long sampling periods in 2004-2005, two during the spring seasons and one during the fall season. A total of 18 species were analyzed for protection effects. After controlling for substratum, location and sampling season, eight groundfish species exhibited higher mean proportional abundance inside than outside the WGMCA while two were proportionally more abundant on average outside of the closure. Four species had higher mean proportional biomasses on average inside the closure and three outside. We conclude that the WGMCA may be achieving its goal of rebuilding abundance and biomass for some commercially targeted groundfishes but not all. This study, six to seven years post-closure establishment, reveals fine-scale spatial and taxonomic complexity which will require a very different monitoring protocol than the one currently in place if adaptive management is to be successful in the region [Current Zoology 56 （1）： 134-143, 2010].

关键词： Effects of fishing Groundfish Gulf of Maine Stellwagen Bank National Marine Sanctuary Trawl closure

Assessment of densified fuel quality parameters:A case study for wheat straw pellet

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Journal of Bioresources and Bioproducts 2023年第1期8卷 45-58页

作者： Bidhan Nath Guangnan Chen les.Bowtell Raid Ahmed Mahmood School of Agriculture and Environmental Science University of Southern QueenslandToowoombaQLD 4350Australia School of Engineering University of Southern QueenslandToowoombaQLD 4350Australia Department of Mechanical Engineering College of EngineeringUniversity of ZakhoZakho 44001Iraq

An investigation was conducted to examine the impact of additive mixing with wheat straw(WS)for pellet *** study manufactured seven types of pellets with different additive combina-tions to evaluate pellet quality characteristics and their relationships.A laboratory-type hammer mill and a pellet mill were used for feedstock preparation and pellet *** investigations showed that the lignin content increased from 7.0%to 13.1%,which was a primary need for ***,the heating value rose from 17.02 to 20.36 MJ/***,the ash content also increased from 7.09%to 16.2%.Results showed that dimension(length and diame-ter),durability,and tensile strength increased significantly with additives while the fines content *** fines content had an inverse relationship with durability and *** straw(60%),together with 10%sawdust(SD),10%corn starch(CS),10%bentonite clay(BC),and 10%biochar(BiC),was optimal with good pellet performance(T7).In addition,both the T5 pellets(70%WS,10%SD,10%BiC,and 10%BC)and the T6 pellets(70%WS,10%SD,10%BiC,and 10%CS)provide suitable quality according to EN plus 2015 standard *** ash content of produced pellet was higher than the recommended value,which suggests that further research onto the alternative additive use for ash reduction is needed.

关键词： Biomass Wheat straw Pellet quality Properties relationship Additive/binding material

Mechanical properties of cotton fabric reinforced geopolymer composites at 200-1000℃

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Journal of Advanced Ceramics 2014年第3期3卷 184-193页

作者： Thamer ALOMAYRI les.VICKERS Faiz U.A.SHAIKH It-Meng LOW Department of Imaging&Applied Physics Curtin UniversityGPO Box U1987PerthWA 6845Australia Department of Physics Umm Al-Qura UniversityMakkah 21955Saudi Arabia Department of Civil Engineering Curtin UniversityGPO Box U1987PerthWA 6845Australia

Geopolymer composites containing woven cotton fabric(0-8.3 wt%)were fabricated using the hand lay-up technique,and were exposed to elevated temperatures of 200℃,400℃,600℃,800℃and 1000℃.With an increase in temperature,the geopolymer composites exhibited a reduction in compressive strength,flexural strength and fracture *** heated above 600℃,the composites exhibited a significant reduction in mechanical *** also exhibited brittle behavior due to severe degradation of cotton fibres and the creation of additional porosity in the *** images verified the existence of voids and small channels in the composites due to fibre degradation.

关键词： geopolymer composites microstructures mechanical properties fracture toughness

Alarm cue induces an antipredator morphological defense in juvenile Nicaragua cichlids Hypsophrys nicaraguensis

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Current Zoology 2010年第1期56卷 36-42页

作者： Maria E.ABATE Andrew G. ENG les.KAUFMAN Department of Biology Boston University Department of Neurosurgery University of Pennsylvania

Olfactory cues that indicate predation risk elicit a number of defensive behaviors in fishes, but whether they are sufficient to also induce morphological defenses has received little attention. Cichlids are characterized by a high level of morphological plasticity during development, and the few species that have been tested do exhibit defensive behaviors when exposed to alarm cues released from the damaged skin of conspecifics. We utilized young juvenile Nicaragua cichlids Hypsophrys nicaraguensis to test if the perception of predation risk from alarm cue （conspecific skin extract） alone induces an increased relative body depth which is a defense against gape-limited predators. After two weeks of exposure, siblings that were exposed to conspecific alarm cue increased their relative body depth nearly double the amount of those exposed to distilled water （control） and zebrafish Danio rerio alarm cue. We repeated our measurements over the last two weeks （12 and 14） of cue exposure when the fish were late-stage juveniles.to test if the rate of increase was sustained; there were no differences in final dimensions between the three treatments. Our results show that 1） the Nicaragua cichlid has an innate response to conspecific alarm cue which is not a generalized response to an injured fish, and 2） this innate recognition ultimately results in developing a deeper body at a stage of the life history where predation risk is high [Current Zoology 56 （1）： 36-42, 2010].

关键词： Alarm substance Inducible defense Phenotypic plasticity Cichlid Chemical cue Antipredator