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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

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Detection of Bisphenol A (BPA) in Plastic Bottles Using Vertical cultivation at Various Temperatures

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Journal of Environmental Protection 2024年第6期15卷 656-671页

作者： Karwan Alkaradaghi Tara Ali Nadhir Al-Ansari Polla Khanaqa jan Laue Department of civil Environmental and Natural Resources Engineering Lulea University of Technology Lulea Sweden Kurdistan Institution for Strategic Studies and Scientific Research Sulaimaniyah Iraq

Polycarbonate plastics containing bisphenol A (BPA) used to manufacture drinking water bottles. Kurdistan region in northern Iraq is a developed area with increased pollution from plastic bottles. Trace amounts of BPA have been detected in bottled water samples. The absorption of BPA was measured with HPLc using a vertical cultivation system with Bulbs of the Allium cepa plant planted in these plastic bottles with monitored growth. Vertical cultivation was found to have a low level of BPA in the plant cells, making it a safe cultivation method under specific climate conditions. The mean concentration of BPA in vertical cultivation is 0.19 ug/ml (3.8 ng for a 20 uL injection), and the Limit of Quantification (LOQ) is 0.63 ug/ml (12.7 ng for 20 uL injection). While Scanning Electron Microscope (SEM) shows that the concentrations are relatively low in water samples stored at room temperature compared to those exposed to direct sunlight (40°c) and water bottle samples stored at (-4°c), The correlation coefficients were found to be good (0.9992). SEM is used for plastic bottle samples stored at different temperatures. The images identify compound decay and explore the morphology of BPA in manufactured plastic materials.

关键词： Vertical cultivation Allium Bisphenol A Plastic Bottles Scanning Electron Microscope (SEM)

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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

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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

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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

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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

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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

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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

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Efficacy and safety of bridging thrombolysis initiated before transfer in a drip-and-ship stroke service

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Stroke & Vascular Neurology 2022年第1期7卷 22-28页

作者： jan christoph Purrucker Miriam Heyse simon Nagel christoph Gumbinger Fatih Seker Markus Mohlenbruch Peter Arthur Ringleb Department of Neurology Heidelberg University HospitalHeidelbergBaden-WürttembergGermany Department of Neuroradiology Heidelberg University HospitalHeidelbergBaden-WürttembergGermany

Objective Data regarding the efficacy and safety of bridging thrombolysis(BT)initiated before transfer for evaluation of endovascular therapy is ***,therefore,analyse efficacy and safety of BT in patients treated within a drip-and-ship stroke *** consecutive adult patients suffering from acute ischaemic stroke and large-vessel occlusions(LVO)transferred to our comprehensive stroke centre for evaluation of endovascular therapy in 2017–2020 were identified from a local prospective stroke database and categorised according to BT and *** was defined as intravenous thrombolysis initiated before *** was assessed before and after *** outcome before stroke and at 3 months using the modified Rankin scale(mRS)was *** outcome was defined as mRS 0–1 or return to prestroke *** safety analysis,intracranial haemorrhages and mortality at 3 months were *** analysis was limited to patients with anterior circulation *** Of N=714 patients,n=394(55.2%)received *** patients in the BT group with documented LVO before transfer recanalised without endovascular therapy(n=46,11.7%)than patients who did not receive BT before transfer(n=4,1.3%,pctor of early recanalisation(adjusted OR 10.9,95%cI 3.8 to 31.1,pctor of an excellent outcome at 3 months(adjusted OR 1.38,95%cI 0.97 to 1.96,p=0.077).There were no differences in safety between the BT and no-BT *** BT initiated before transfer was a strong independent predictor of early recanalisation.

关键词： drip initiated service

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Different radial growth responses to climate warming by two dominant tree species at their upper altitudinal limit on changbai Mountain

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Journal of Forestry Research 2017年第4期28卷 795-804页

作者： Liwen Zhuang jan c. Axmacher Weiguo Sang Heilongjiang Forestry Academy of Sciences Harbin 150040People’s Republic of China UcL Department of Geography University College LondonPearson BuildingGower StreetLondon WC1E 6BTUK Minzu University of china Beijing 100081People’s Republic of China State Key Laboratory of Vegetation and Environmental change Institute of BotanyChinese Academy of SciencesBeijing 100093People’s Republic of China

We analyzed the influence of climate change over the past 50 years on the radial growth of two tree species: Korean pine (Pinus koraiensis) and Yezo spruce (Picea jezoensis), located on changbai Mountain, Northeast china, using a dendrochronology approach to understand factors that limit the altitude for tree species. Elevated temperatures increased the radial growth of Korean pine and decreased that of Yezo spruce. The positive response of tree growth to hydrothermal conditions was the key reason that the upper limit of elevation of Korean pine followed the temperature fluctuation pattern. Increased temperatures and precipitation and longer growing seasons accelerated Korean pine growth. As the temperature increased, correlations between Korean pine ring-width chronology and precipitation changed from negative to positive. In Yezo spruce, increasing monthly temperatures and inadequate precipitation during the middle and late parts of the growing season led to narrow growth rings, whereas decreasing monthly temperatures and sufficient precipitation during the late growing season promoted growth. Rising temperatures and adequate precipitation increases Korean pine growth, possibly elevating the upper range limit in altitude for this species. In contrast, Yezo spruce growth is negatively affected by warming temperatures and limited precipitation. Under future temperature increases and precipitation fluctuations, the upper limit altitude of Korean pine can reasonably be expected to shift upward and Yezo spruce downward.

关键词： climate change Picea jezoensis Pinus koraiensis Tree-ring Upper altitudinal limit

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