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Journal of Materials Science and chemical Engineering 2024年第4期12卷 1-17页

作者： Djedjess Essoh Jules-césar Meledje Bi Irié Marc Gouli Drissa Ouattara Kra Vanh Eric-simon Zran Adjourma Konate Albert Trokourey Laboratoire de chimie des Eaux (LcE) de l’ Ecole Normale Sup&#233rieure d&#8217Abidjan Abidjan C&#244te d&#8217Ivoire Laboratoire de constitution et Ré action de la Mati&#232re (LCRM) &#224 l&#8217UFR SSMT-Universit&#233 F&#233lix Houphou&#235t-Boigny (UFHB) de Cocody Abidjan C&#244te d&#8217Ivoire

The availability of groundwater of acceptable quality has become a difficult challenge to meet in many countries, particularly côte d’Ivoire. The State of côte d’Ivoire and rural populations are building hydraulic infrastructure for this purpose. However, the quality of water coming from these infrastructures remains to be determined. This study therefore aims to analyze certain physicochemical parameters of the groundwater of Gloazra, Kouezra and Trahonfla. These are temperature, pH, electrical conductivity, TDS, salinity level, hardness, alkalinity, chloride content and bicarbonate. To determine the pH, electrical conductivity, temperature, TDS, and salinity rate, an electrochemical analysis was carried out. The titrimetric analysis made it possible to determine the chloride and bicarbonate content, alkalinity, and hardness. The results indicate that the studied groundwater is soft and acidic with good mineralization. This water does not present a health hazard to consumers but can affect hydraulic equipment and household containers.

关键词： Ivory coast Gloazra Trahonfla Kouezra Physicochemical Parameters Water WHO Standards

Photoelectrochemical Iron-catalyzed c(sp^(3))-H Borylation of Alkanes in a Position-Selective Manner

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ccS chemistry 2024年第6期6卷 1430-1438页

作者： Wen Wei Bin Wang simon L.Homölle Jinbin Zhu Yanjun Li Tristan von Münchow Isaac Maksso Lutz Ackermann Institut für Organische und Biomolekulare chemie Georg-August-Universität Göttingen37077 Göttingen

catalytic c-H borylation is of prime topical importance,since easily available feedstock chemicals can thereby be transformed into valuable transient functional groups in the absence of directing ***,we disclose an iron-catalyzed c(sp^(3))-H borylation of simple,non-prefunctionalized alkanes,providing access to value-added products in a single step by means of *** power of merging photo-and electrochemistry was mirrored by ample scope and exceedingly mild reaction ***,an outstanding position-selectivity in favor of primary c(sp^(3))-H proved viable within the photoelectrochemical borylation through a chemo-selective anodic overoxidation *** ferro-photoelectrochemistry strategy avoids toxic precious transition metals,enabling c(sp^(3))-H borylations in a site-selective fashion.

关键词： photoelectrocatalysis c(sp^(3))-H borylation iron catalysis position-selectivity chlorine radical

A comparison of Hydrothermal Aging, SO₂ and Propene Poisoning Effects on NH₃-ScR over cu-ZSM-5 and cu-SAPO-34 catalysts

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Journal of Materials Science and chemical Engineering 2024年第5期12卷 10-28页

作者： Kouadio Brou Albert Koffi Konan Martin Zran Van Eric-simon Horo Kone Unité de Formation et de Recherche des Sciences et de Technologies (UFR ST) Universit&#233 Alassane Ouattara Bouak&#233 C&#244te d&#8217Ivoire Unité de Formation et de Recherche Environnement (UFR E) Universit&#233 Jean Lorougnon Gu&#233d&#233 Daloa C&#244te d&#8217Ivoire Unité de Formation et de Recherche des Sciences des Structures de la Mati&#232re et de Technologie (UFR SSMT) Abidjan C&#244te d&#8217Ivoire

This study was aimed to investigate the effects of hydrothermal aging, propene and SO2 poisoning on the ammonia-selective catalytic reduction (NH3-ScR) performance of both cu-SAPO-34 and cu-ZSM-5. The catalytic activities of fresh, aged and poisoned samples were tested in ammonia-selective catalytic reduction (NH3-ScR) of NOx conditions. The XRD, TG and N2-desorption results showed that the structures of the cu-SAPO-34 and cu-ZSM-5 remained intact after 750˚c hydrothermally aged, SO2 and propene poisoned. After hydrothermal aging at 750˚c for 12 h, the NO reduction performance of cu-ZSM-5 was significantly reduced at lower temperatures, while that of cu-SAPO-34 was less affected. Moreover, cu-SAPO-34 catalyst showed high NO conversion with SO2 or propene compared to cu-ZSM-5. However, cu-ZSM-5 showed a larger drop in catalytic activity with SO2 or propene compared to cu-SAPO-34 catalyst. The H2-TPR results showed that cu2 ions could be reduced to cu and cu0 for cu-ZSM-5, while no significant transformation of copper species was observed for cu-SAPO-34. Meanwhile, the UV-vis DRS results showed that cuO species were formed in cu-ZSM-5, while little changes were observed for the cu-SAPO-34. cu-SAPO-34 showed high sulfur and hydrocarbon poison resistance compared to cu-ZSM-5. In summary, cu-SAPO-34 with small-pore zeolite showed higher hydrothermal stability and better hydrocarbon and sulfur poison resistant than cu-ZSM-5 with medium-pore.

关键词： Hydrothermal Aging Propene and SO2Poisoning Ammonia-Selective catalytic Reduction(NH3-ScR) cu-SAPO-34 cu-ZSM-5

The W3c Data catalog Vocabulary,Version 2:Rationale,Design Principles,and Uptake

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Data Intelligence 2024年第2期6卷 457-487页

作者： Riccardo Albertoni David Browning simon cox Alejandra N.Gonzalez-Beltran Andrea Perego Peter Winstanley Istituto di Matematica Applicata e Tecnologie Informatiche"Enrico Magenes" Consiglio Nazionale delle Ricerche(IMATI-CNR)GenoaItaly Independent consultant United Kingdom LandandWater CSiROMelbourneAustralia Scientific computing Rutherford Appleton LaboratoryScience and Technology Facilities CouncilHarwell Cam-pusOx110QXUnited Kingdom European Parliament Luxembourg Semantic Arts Fort CollinsCO80524USA

DcAT is an RDF vocabulary designed to facilitate interoperability between data catalogs published on the *** its first release in 2014 as a W3c Recommendation,DcAT has seen a wide adoption across communities and domains,particularly in conjunction with implementing the FAIR data principles(forfindable,accessible,interoperable and reusable data).These implementation experiences,besides demonstrating the fitness of DcAT to meet its intended purpose,helped identify existing issues and ***,over the last few years,additional requirements emerged in data catalogs,given the increasing practice of documenting not only datasets but also data services and *** paper illustrates the new version of DcAT,explaining the rationale behind its main revisions and extensions,based on the collected use cases and requirements,and outlines the issues yet to be addressed in future versions of DcAT.

关键词： Data catalogs Interoperability Discoverability FAIR data

Production of Yam Tubers Using Seed Tubers from Vitroplants Regenerated from Aerial Stems in the Yam Species Dioscorea alata (L.) and Dioscorea cayenensis-rotundata (L. & P.) in côte d’Ivoire

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Advances in Bioscience and Biotechnology 2024年第3期15卷 184-194页

作者： Koffi Honoré Kouamé Kouakou Marius Konan Kouadio Ignace Kouassi Kouablan Edmond Koffi Assanvo simon-Pierre N’Guetta Department of des Science and Technology University Alassane Ouattara of Bouaké Bouaké C&#244te d’Ivoire Plant Production Research Unit Department of Natural Sciences University Nangui Abrogoua Abidjan C&#244te d’Ivoire central Biotechnology Laboratory National Center for Agronomic Research (NCAR) Abidjan C&#244te d’Ivoire Genetics Laboratory of Bioscience Research Unit University Félix Houphou&#235t Boigny (UFHB) Abidjan C&#244te d’Ivoire

The aim of this study is to produce large quantities of yam tubers in the field from seed tubers derived from vitroplants regenerated from aerial stem cuttings and farmers’ tuber seeds. Seed tubers from ten yam cultivars, including five from Dioscorea alata (cDa083, cDa053, cDa115, cDa150 and cDa266) and five from Dioscorea cayenensis-rotundata (cDr015, cDr027, cDr150, cDr206 and cDr148) with distinct agro-morphological characteristics, were used as material. A completely randomized block design with 3 replications was used. In each block, all cultivars and seed types were represented. When put into cultivation, the tubers produced by the vitroplants all germinated and gave 100% healthy plants, compared with 86% to 100% healthy plants for the seed tubers produced by the farmers. Yields per hectare ranged from 10 to 25 tonnes for seed tubers produced by in vitro plants, and from 4 to 9 tons for seed tubers produced by farmers. Seed tubers from vitroplants can therefore be recommended to farmers as a solution to the problem of seed tuber unavailability.

关键词： Yams Vitroplants Seed Tubers Yields

经皮冠状动脉介入的急性冠状动脉综合征患者早期不同联合降血脂策略效果分析

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中国医药 2024年第1期19卷 6-10页

作者：柳浩 Emmanuel simon Kinayi 张波大连医科大学附属第一医院心内科大连116000

目的分析经皮冠状动脉介入(PcI)治疗的急性冠状动脉综合征(AcS)患者早期不同联合降血脂策略的疗效。方法选取2018年1月至2022年6月大连医科大学附属第一医院诊断为AcS并行PcI治疗的患者,根据患者出院时降血脂方案,分为A组(他汀类药物+... 详细信息

目的分析经皮冠状动脉介入(PcI)治疗的急性冠状动脉综合征(AcS)患者早期不同联合降血脂策略的疗效。方法选取2018年1月至2022年6月大连医科大学附属第一医院诊断为AcS并行PcI治疗的患者,根据患者出院时降血脂方案,分为A组(他汀类药物+依折麦布)、B组(他汀类药物+依洛尤单抗)和c组(他汀类药物+依折麦布+依洛尤单抗),各73例。比较3组患者基线及1、6个月随访时低密度脂蛋白胆固醇(LDL-c)和其他血脂指标水平变化。结果在1、6个月随访时,B、c组LDL-c较基线下降幅度显著大于A组,LDL-cc组间比较差异均无统计学意义(均P>0.05);3组间三酰甘油、载脂蛋白A1水平比较差异均无统计学意义(均P>0.05)。结论他汀类药物联合应用依洛尤单抗可快速降低AcS行PcI患者血脂,增加LDL-c达标率,但是在他汀类药物联合依洛尤单抗基础上再联合依折麦布降低LDL-c的效果并不优于他汀类药物联合依洛尤单抗。

关键词：急性冠状动脉综合征依洛尤单抗依折麦布低密度脂蛋白胆固醇

Inaccuracies in the history of a well-known introduction:a case study of the Australian House Sparrow(Passer domesticus)

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chinese Birds 2016年第2期7卷 95-109页

作者： Samuel c.Andrew simon c.Griffith Department of Biological Sciences Macquarie University

Background:Modern ecosystems contain many invasive species as a result of the activity of acclimatisation societies that operated in the second half of the nineteenth century,and these species provide good opportunities for studying invasion ***,to gain insight into the ecological and genetic mechanisms that determine the rate of colonization and adaptation to new environments,we need a good understanding of the history of the introduced species,and a knowledge of the source population,timing,and number of individuals introduced is particularly ***,any inaccuracies in the history of an introduction will affect subsequent assumptions and ***:Focusing on a single well-known species,the House Sparrow(Passer domesticus),we have documented the introduction into Australia using primary sources(*** records and newspaper articles).Results:Our revised history differs in a number of significant ways from previous *** evidence indicates that the House Sparrow was not solely introduced from source populations in England but also from Germany and most strikingly also from India—with the latter birds belonging to a different *** also clarify the distinction between the number released and the number of founders,due to pre-release captive breeding programs,as well as identifying inaccuracies in a couple of well-cited sources with respect to the range expansion of the introduced ***:Our work suggests that caution is required for those studying introductions using the key sources of historical information and ideally should review original sources of information to verify the accuracy of published accounts.

关键词： Acclimatisation Bottlenecks Propagule size Range expansion Hybridisation

Hepatitis B Surface Antigen and Hepatitis c Virus Antibodies among Drug Users in Burkina Faso

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Advances in Microbiology 2024年第1期14卷 92-104页

作者： Sylvie Zida Kadari cissé Odette Ky-Zerbo Dinanibè Kambiré Serge Théophile Soubeiga simon Tiendrebéogo Fatou Sissoko Issa Sory célestine Ki-Toé Solange Dioma Djeneba Zorom Adama Ouédraogo cedric Dimitri Axon Hien Mahamoudou Sanou Seni Kouanda Henri Gautier Ouédraogo Institut de Recherche en Sciences de la Sant&eacute Ouagadougou Burkina Faso D&eacute partement de G&eacuteographie Universit&eacute Norbert ZONGO Koudougou Burkina Faso Secr&eacute tariat permanent du Conseil national de lutte contre le Sida et les IST (SP/CNLS-IST) Ouagadougou Burkina Faso Initiative Priv&eacute e et Communautaire pour la Sant&eacute et la Riposte au VIH/SIDA au Burkina Faso (IPC/BF) Ouagadougou Burkina Faso Unit&eacute de Formation et de Recherche en Sciences de la Sant&eacute (UFR-SDS) Universit&eacute Joseph KI-ZERBO Ouagadougou Burkina Faso

Introduction: The epidemiology of both hepatitis B virus (HBV) and hepatitis c virus (HcV) infections among drug users (DUs) is little known in West Africa. The study aimed to assess the prevalence of hepatitis B and c viruses among drug users in Burkina Faso. Methodology: This was a cross-sectional biological and behavioral survey conducted between June and August 2022, among drug users in Ouagadougou and Bobo Dioulasso, the two main cities of Burkina Faso. A respondent-driven sampling (RDS) was used to recruit drug users. Hepatitis B surface antigen was determined using lateral flow rapid test kits and antibodies to hepatitis c virus in serum determined using an Enzyme-Linked Immunosorbent Assay. Data were entered and analyzed using Stata 17 software. Weighted binary logistic regression was used to identify the associated factors of hepatitis B and c infections and a p-value Results: A total of 323 drug users were recruited with 97.5% males. The mean age was 32.7 years old. The inhaled or smoked mode was the most used by drug users. The adjusted hepatitis B and hepatitis c prevalence among study participants were 11.1% and 2.3% respectively. The marital status (p = 0.001), and the nationality (p = 0.011) were significantly associated with hepatitis B infection. The type of drug used was not significantly associated with hepatitis B infection or hepatitis c infection. conclusion: The prevalence of HBsAg and anti-HcV antibodies among DUs are comparable to those reported in the general population in Burkina Faso. This result suggests that the main routes of contamination by HBV and HcV among DUs are similar to those in the population, and could be explained by the low use of the injectable route by DUs in Burkina Faso.

关键词： Drug Users Hepatitis c Hepatitis B Prevalence Burkina Faso

Overview of automotive engine friction and reduction trends-Effects of surface, material, and lubricant-additive technologies

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Friction 2016年第1期4卷 1-28页

作者： Victor W.WONG simon c.TUNG Massachusetts Institute of Technology Cambridge MA 02139 USA Vanderbilt chemicals LLc Norwalk CT 06856 USA

The increasing global environmental awareness, evidenced by recent worldwide calls for control of climate change and greenhouse emissions, has placed significant new technical mandates for automotives to improve engine efficiency, which is directly related to the production of carbon dioxide, a major greenhouse gas. Reduction of parasitic losses of the vehicle, powertrain and the engine systems is a key component of energy conservation. For engine efficiency improvement, various approaches include improvements in advanced combustion systems, component system design and handling—such as down-sizing, boosting, and electrification—as well as waste heat recovery systems etc. Among these approaches, engine friction reduction is a key and relatively cost-effective approach, which has been receiving significant attention from tribologists and lubricant-lubrication engineers alike. In this paper, the fundamentals of friction specific to the environments of engine components tribology are reviewed, together with discussions on the impact of developing vehicle powertrain technologies, surface and material technologies, as well as lubricant and additive technologies on promises of continuing friction and wear reduction trends. The international accords on climate change require further gains in fuel efficiency and energy sustainability from all industry sectors including those in the automotive and the broader internal combustion engine industries, and the latter encompass off-highway, power generation, marine, and rail industries as well. This paper focsuses on friction reduction in mainly automotive engines, however. The paper starts with a clarification of the common descriptors of mechanical losses and friction in the engine, followed by the topic of lubrication fundamentals such as lubrication regimes. Then the lubrication of the contacting surfaces in each of the major engine subsystems is discussed in turn. These subsystems include the piston assembly: ring-pack/liner,

关键词： powertrain tribology automotive lubricants additive formulation mechanical design surface coatings and textures friction wear

cannibalism in the pea aphid, Acyrthosiphon pisum

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Insect Science 2014年第6期21卷 750-758页

作者： Lucy c. cooper camille Desjonqueres simon R. Leather Imperial college London Silwood Park Campus Buckhurst Road Ascot Berkshire SL5 7PY Department of crop and Environment Sciences Harper Adams University Edgmond Newport Shropshire TF10 8NB United Kingdom

Previous observations of cannibalism have been made in the aphid Acyrthosiphon pisum （L.）： this article seeks to quantify factors contributing to such be- haviors. We observed and quantified the responses of a number of clones and life stages to varying levels of starvation, in the form of increasingly desiccated Vicafaba L. plants （receiving 50, 25, or 10 mL every second day） or a complete absence of host plant. We found that, while the longest incidences of cannibalism are carried out by juveniles （F = 3.45, P = 0.019, df = 3） and targeted at adults, the starvation treatments had the most significant effect on the prevalence of cannibalism in mature A. pisum （F ---- 2.24, P = 0.025, df = 9）. Furthermore, there was no difference between the prevalence or dura- tion of cannibalistic activities within and between different clones （P 〉 0.05 in all cases）, though juveniles were more likely to target unrelated aphids （V = 6 112, P = 0.011）, and spent more time feeding on aphids from the same culture （V = 6 062, P = 0.018）.

关键词： Acyrthosiphon pisum Aphididae behavior cannibalism kin selection modularity