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Synthesis of boron nitride nanorod and its performance as a metalfree catalyst for oxidative desulfurization of diesel fuel

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Chinese Journal of Chemical Engineering 2024年第4期68卷 120-132页

作者： Tanaz Ghanadi Gholamreza Moradi Alimorad rashidi Catalyst Research Center Faculty of Chemical and Petroleum EngineeringRazi UniversityKermanshahIran Nanotechnology Research Center Research Institute of Petroleum Industry(RIPI)TehranIran

In order to reduce the sulfur compounds in diesel fuel,boron nitride(BN)has been used as a novel metal-free catalyst in the present *** nanocatalyst was synthesized via template-free approach followed by heating treatment at 900℃ in nitrogen atmosphere that the characteristics of the sample were identified by the X-ray diffraction,Fourier-transform infrared spectroscopy,Raman spectroscopy,field emission scanning electron microscopy,transmission electron microscopy,atomic force microscopy,and N2 adsorption-desorption *** results of structural and morphological analysis represented that BN has been successfully *** efficacy of the main operating parameters on the process was studied by using response surface methodology based on the Box-Behnken design *** prepared catalyst showed high efficiency in oxidative desulfurization of diesel fuel with initial sulfur content of 8040 mg·kg^(-1)*** statistical analysis,a significant quadratic model was obtained to predict the sulfur removal as a function of efficient *** maximum efficiency of 72.4%was achieved under optimized conditions at oxidant/sulfur molar ratio of 10.2,temperature of 71℃,reaction time of 113 min,and catalyst dosage of 0.36 ***,the reusability of the BN was studied,and the result showed little reduction in activity of the catalyst after 10 times ***,a plausible mechanism was proposed for oxidation of sulfur compounds on the surface of the *** present study shows that BN materials can be selected as promising metal-free catalysts for desulfurization process.

关键词： Desulfurization Boron nitride(BN)nanostructure Experimental design BoxeBehnken

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Performance improvement in stepped solar still modified by sponge layer

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Journal of Central South University 2024年第6期31卷 1973-1982页

作者： Mahtab TARAHOMI Saman rashidi Faramarz HORMOZI Shahabeddin ASHTIANI Department of Chemical Petroleumand Gas EngineeringSemnan UniversitySemnanIran Department of Energy Faculty of New Sciences and TechnologiesSemnan UniversitySemnanIran

In this paper,the experimental investigation on the performance improvement of conventional stepped solar still is *** steps are covered by the porous material to improve the performance of the conventional device and increase the evaporation *** the parameters,including the temperature on the glass surface,the water temperature inside the evaporation zone,and the amount of water produced in both conventional and modified stepped solar stills are measured and *** efficiency of two devices and their exergy efficiency have been ***,the economic analysis of both devices has been done to check the economic feasibility of the modified *** amount of freshwater generated during one day was 2244.4 and 3076.2 mL/m^(2),respectively for the conventional and modified stepped solar *** a result,the amount of water produced in one day by modified stepped solar still is 35.5% more than the conventional ***,the costs for the conventional and modified stepped solar stills have been calculated as 0.0359 and 0.029$/(L·m^(-2)),respectively.

关键词： stepped solar still black sponge efficiency exergy economic analysis

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A review on the cooling of energy conversion and storage systems using thermoelectric modules

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Journal of Central South University 2024年第6期31卷 1998-2026页

作者： Amirreza IJADI Mehran Rajabi ZARGARABADI Saman rashidi Amir Mohammad JADIDI Department of Energy Faculty of New Sciences and TechnologiesSemnan UniversitySemnanIran Faculty of Mechanical Engineering Semnan UniversityP.O.B.***SemnanIran

Exploitation of sustainable energy sources requires the use of unique conversion and storage systems,such as solar panels,batteries,fuel cells,and electronic *** load management of these energy conversion and storage systems is one of their challenges and *** this article,the thermal management of these systems using thermoelectric modules is *** results show that by choosing the right option to remove heat from the hot side of the thermoelectric modules,it will be a suitable local cooling,and the thermoelectric modules increase the power and lifespan of the system by reducing the spot *** modules were effective in reducing panel *** increase the time to reach a temperature above 50℃ in batteries by 3 to 4 ***,in their integration with fuel cells,they increase the power density of the fuel cell.

关键词： cooling photovoltaic lithium-ion batteries fuel cell electronic equipment thermoelectric modules

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Effect of CO_(2)exposure on the mechanical strength of geopolymerstabilized sandy soils

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 670-681页

作者： Hamid Reza Razeghi armin Geranghadr Fatemeh Safaee Pooria Ghadir Akbar A.Javadi School of Civil Engineering Iran University of Science and TechnologyTehran***Iran Department of Engineering University of ExeterExeterEX44QFUK

In recent years,there has been growing interest in developing methods for mitigating greenhouse effect,as greenhouse gas emissions continue to contribute to global temperature *** the other hand,investigating geopolymers as environmentally friendly binders to mitigate the greenhouse effect using soil stabilization has been widely ***,the effect of CO_(2)exposure on the mechanical properties of geopolymer-stabilized soils is rarely *** this context,the effect of CO_(2)exposure on the mechanical and microstructural features of sandy soil stabilized with volcanic ash-based geopolymer was *** factors were concerned,for example the binder content,relative density,CO_(2)pressure,curing condition,curing time,and carbonate *** results showed that the compressive strength of the stabilized sandy soil specimens with 20%volcanic ash increased from 3 MPa to 11 *** was also observed that 100 kPa CO_(2)pressure was the optimal pressure for strength development among the other *** mechanical strength showed a direct relationship with binder content and carbonate ***,in the ambient curing(AC)condition,the mechanical strength and carbonate content increased with the curing ***,the required water for carbonation evaporated after 7 d of oven curing(OC)condition and as a result,the 14-d cured samples showed lower mechanical strength and carbonate content in comparison with 7-d cured ***,the rate of strength development was higher in OC cured samples than AC cured samples until 7 d due to higher geopolymerization and carbonation rate.

关键词： Soil stabilization CO_(2)effect Geopolymer

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Impact of umbelliprenin-containing niosome nanoparticles on VEGF-A and CTGF genes expression in retinal pigment epithelium cells

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 7-15页

作者： Farzad Dastaviz Akram Vahidi Teymoor Khosravi Ayyoob Khosravi Mehdi Sheikh Arabi Abouzar Bagheri Mohsen rashidi Morteza Oladnabi Stem Cell Research Center Golestan University of Medical SciencesGorgan ***Iran Department of Medical Genetics School of Advanced Technologies in MedicineGolestan University of Medical SciencesGorgan ***Iran Student Research Committee Golestan University of Medical SciencesGorgan ***Iran Department of Molecular Medicine Faculty of Advanced Medical TechnologiesGolestan University of Medical SciencesGorgan ***Iran Department of Medical Nanotechnology Faculty of Advanced Medical TechnologiesGolestan University of Medical SciencesGorgan ***Iran Department of Clinical Biochemistry and Genetics Faculty of MedicineMazandaran University of Medical SciencesSari ***Iran Department Pharmacology Faculty of MedicineMazandaran University of Medical SciencesSari ***Iran Gorgan Congenital Malformations Research Center Golestan University of Medical SciencesGorgan ***Iran

AIM:To investigate the impact of niosome nanoparticles carrying umbelliprenin(UMB),an anti-angiogenic and anti-inflammatory plant compound,on the expression of vascular endothelial growth factor(VEGF-A)and connective tissue growth factor(CTGF)genes in a human retinal pigment epithelium(RPE)-like retina-derived cell ***:UMB-containing niosomes were created,optimized,and ***-like cells were treated with free UMB and UMB-containing *** IC_(50)values of the treatments were determined using an MTT *** expression of VEGF-A and CTGF was evaluated using real-time polymerase chain reaction after RNA extraction and cDNA ***’characteristics,including drug entrapment efficiency,size,dispersion index,and zeta potential were *** UMB had an IC_(50)of 96.2μg/mL,while UMB-containing niosomes had an IC_(50)of 25μg/***:Treatment with UMB-containing niosomes and free UMB resulted in a significant reduction in VEGF-A expression compared to control cells(P=0.001).Additionally,UMB-containing niosomes demonstrated a significant reduction in CTGF expression compared to control cells(P=0.05).However,there was no significant reduction in the expression of both genes in cells treated with free ***:Both free UMB and niosome-encapsulated UMB inhibits VEGF-A and CTGF genes ***,the latter demonstrates significantly greater efficacy,potentially due to the lower UMB dosage and gradual *** findings have implications for anti-angiogenesis therapeutic approaches targeting age-related macular degeneration.

关键词： umbelliprenin niosome age-related macular degeneration vascular endothelial growth factor-A connective tissue growth factor

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“一带一路”倡议在坦桑尼亚的进展、成就与挑战

“一带一路”倡议在坦桑尼亚的进展、成就与挑战

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作者： MAKWEGA rashidi MOHAMED 吉林大学

学位级别：硕士

通过鼓励基础设施领域的国际合作,中国的“一带一路”倡议已然成为全球经济发展的关注焦点。为了分析“一带一路”倡议(BRI)对坦桑尼亚的基础设施改善、经济发展和行政能力的巨大影响,本文对坦桑尼亚进行了细致的研究。本研究的基本问题... 详细信息

通过鼓励基础设施领域的国际合作,中国的“一带一路”倡议已然成为全球经济发展的关注焦点。为了分析“一带一路”倡议(BRI)对坦桑尼亚的基础设施改善、经济发展和行政能力的巨大影响,本文对坦桑尼亚进行了细致的研究。本研究的基本问题是:中国的“一带一路”倡议的实施对坦桑尼亚的经济增长和基础设施建设都有积极影响,阻碍其发展的主要挑战是什么?本研究的主要观点是:“一带一路”倡议对坦桑尼亚的经济产生了重要影响,尤其是在基础设施建设和中坦经济合作方面,包括港口、扩展线路、公路和铁路等重要驱动力的发展,对坦桑尼亚的经济发展至关重要。例如,1970年至1975年期间,坦桑尼亚在中国帮助下修建的坦赞铁路是中坦两国进一步完善双边合作框架、推进经济发展务实合作的重要代表。坦桑尼亚的道路、港口和铁路的重新设计规划也得益于“一带一路”倡议的贡献,这极大地提升了坦桑尼亚经济潜力。本研究的重要意义在于其探讨了中国如何在“一带一路”倡议框架下支持坦桑尼亚的经济发展和基础设施建设。本研究的目的是为坦桑尼亚政府提供政策建议,强调在基础设施以外的农业、技术和教育等领域开展国际合作的重要性,本研究还探讨了与坦桑尼亚经济发展相关的重要课题,为寻找相关专业知识的重要智库机构和政策制定者提供了助益。本研究运用了一系列信息收集方法,包括电话访谈、背景调查和选择性信息调查。其中,选择性信息调查主要来源于已公布的以及尚未公布的相关研究,这为本研究提供了充分的支撑理由。案例研究法对“一带一路”倡议的影响进行了细致了解,从而得以对坦桑尼亚的特定环境进行深入分析。而通过电话采访坦赞铁路公司、坦桑尼亚风险中心、坦桑尼亚投资中心、坦桑尼亚发展办公室和坦桑尼亚银行等重要机构,则有助于本文更快地收集数据并获得权威的信息来源。这项研究的成果得以揭示贸易模式的变化,并提供有用的数据说明这些变化如何影响坦桑尼亚各地区的经济竞争力。此外,本研究通过分析“一带一路”倡议在坦桑尼亚实施过程中取得的成功和面临的挑战,有助于更广泛地探讨外国的合作倡议如何影响发展中国家的经济前景。本研究重点关注坦桑尼亚与中国之间的复杂关系,考察了中国“一带一路”倡议的整体影响和密切经济合作及其前提基础。坦桑尼亚受到其过往历史和由此产生的自治传统的塑造,并在中国的合作愿望下成为其重要伙伴。作为“一带一路”倡议的一部分,中国对坦桑尼亚的基础设施进行了大量投资,这既带来了机遇,也带来了担忧。在分析中国与坦桑尼亚的关系对世界的影响时,本研究考虑了坦桑尼亚的面积和丰富资源。在分析“一带一路”倡议可能带来的贸易模式、经济影响和发展支持的同时,本研究还对“一带一路”对各国的利弊进行了比对分析。此外,本文运用概念模型对双方复杂关系的各个方面进行了背景分析和理解,包括互利合作、发展前景和国际事务等。鉴于坦桑尼亚的城市化和基础设施不足的问题,中国通过“一带一路”倡议参与促进坦桑尼亚的经济增长正变得越来越重要。在“一带一路”倡议与坦桑尼亚和其他类似的合作伙伴关系中,这些成果凸显了开放、全面和务实的合作方法对于确保“一带一路”倡议的长期稳定性的意义。本研究的第二部分探讨了中国通过“一带一路”参与坦桑尼亚事务的开始和发展过程。这一部分主要讲述了中坦关系的发展历程,其开始于1961年双方建交,以及1966年合作协议和尼雷尔总统任期内启动的坦赞铁路项目等重要时间节点,而在2013年的“一带一路”倡议中,坦桑尼亚因其地理区域、既有关系和经济潜力而被定位为重要成员。本部分还探讨了中国对坦桑尼亚“一带一路”企业战略的回应,介绍了中国资本的激增和坦桑尼亚人民对中国的积极看法。研究揭示了坦桑尼亚的经济环境,包括其稳定性、问题以及受中国投资影响的重要企业。翔实的数据展示了“一带一路”倡议项目在坦桑尼亚的技术实践,其中包括标准轨距铁路线、马古富里延展线、尼雷尔水电站和巴加莫约港等令人瞩目的项目。该部分还介绍了坦桑尼亚和中国的互惠合作组织,并展示了“一带一路”如何成为增进互惠关系、改善基础设施和经济发展的驱动力。本研究的第三部分探讨了坦桑尼亚与“一带一路”倡议的关系,介绍了中国作为合作伙伴和其他国家投资驱动者的重要性。中坦两国的国内和全球计划都受到国际社会的影响并引发了对非洲基础设施项目的竞争。作为对合作政策的调整,目前坦桑尼亚已经将部分铁路线路承包权授予一家土耳其公司,无论中国对坦桑尼亚的义务是否不同于王毅外长在2021年访问非洲时提出的对其他非洲国家的20亿美元援助义务,坦桑尼亚都需要中国提供更多合理的条件。来自中国的投资改善了坦桑尼亚的商业,增加了国民收入,并在采矿、装配和农业等不同行业创造了就业岗位。基础设施改进已成为一个重要的投资领域,中国投资者借此进一步发展坦桑尼亚的交通网络。目前,长达1219公里的标准轨距铁路项目将达累斯萨拉姆与坦桑尼亚东南部边境连接

关键词： China Aid China-Tanzania Relationship Economy Development

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Impacts of radiation therapy on quality of life and pain relief in patients with bone metastases

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World Journal of Orthopedics 2024年第9期15卷 841-849页

作者： armin Hoveidaei Mehdi Karimi Vida Khalafi Patrick Fazeli Amir Human Hoveidaei Students’Scientific Research Center Exceptional Talents Development CenterTehran University of Medical SciencesTehran ***Iran Bogomolets National Medical University Kyiv 01601Ukraine Student Research Committee Jahrom University of Medical SciencesJahrom ***Iran Brown University ProvidenceRI 02912United States International Center for Limb Lengthening Rubin Institute for Advanced OrthopedicsSinai Hospital of BaltimoreBaltimoreMD 21215United States

Bone metastases(BM)are a common complication in advanced cancer patients,significantly contributing to morbidity and mortality due to their ability to cause pain,fractures,and spinal cord *** therapy(RT)is vital in managing these complications by targeting metastatic lesions to ease pain,improve mobility,and reduce the risk of skeletal-related events such as *** supports the effectiveness of RT in pain relief,showing its ability to provide significant palliation and lessen the need for opioid painkillers,thereby enhancing the overall quality of life(QoL)for patients with ***,optimizing RT outcomes involves considerations such as the choice of radiation technique,dose fractionation schedules,and the integration of supportive care measures to mitigate treatment-related side effects like fatigue and skin *** factors highlight the importance of personalized treatment planning tailored to individual patient needs and tumor *** mini-review aims to provide comprehensive insights into the multifaceted impacts of RT on pain management and QoL enhancement in BM patients,with implications for refining clinical practices and advancing patient care through the synthesis of findings from various studies.

关键词： Radiation therapy Radiotherapy Quality of life Pain relief Bone metastases Bone cancer

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退火热处理对增材制造AlSi10Mg合金宏观和微观变形行为的影响

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金属学报 2024年第8期60卷 1091-1099页

作者：张星星 LUTZ Andreas 甘为民 MAAWAD Emad KRIELE armin 中国科学院高能物理研究所多学科研究中心北京100049 Mercedes Benz AG Research and Development DepartmentLeibnizstr.271032 BöblingenGermany Institute of Materials Physics Helmholtz-Zentrum HereonMax-lanck-Str.121502 GeesthachtGermany German Engineering Materials Science Centre(GEMS)at Heinz Maier-Leibnitz Zentrum(MLZ) Helmholtz-Zentrum Hereon85748 GarchingGermany

增材制造AlSi10Mg合金存在显著的残余应力,对零件的形状尺寸精度、服役安全性和抗腐蚀性能等产生不利影响。在实际应用中,对残余应力敏感的应用需采用去应力退火以消除残余应力。然而,目前对增材制造AlSi10Mg合金退火后力学特性的理解... 详细信息

增材制造AlSi10Mg合金存在显著的残余应力,对零件的形状尺寸精度、服役安全性和抗腐蚀性能等产生不利影响。在实际应用中,对残余应力敏感的应用需采用去应力退火以消除残余应力。然而,目前对增材制造AlSi10Mg合金退火后力学特性的理解还停留在宏观层面。为了更深入地揭示其微观力学行为与内在机制,本工作利用同步辐射X射线衍射技术,对合金进行原位变形研究,分析Al和Si相的晶格应变应力演化,明确各物相对合金加工硬化率的具体贡献,并对位错密度的演变进行了量化分析,从而阐明了退火热处理对增材制造AlSi10Mg合金载荷传递行为与位错行为的影响。

关键词：同步辐射X射线衍射原位变形增材制造 AlSi10Mg合金热处理

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Correlation between critical thinking and emotional intelligence:a national crosssectional study on operating room nursing students in Iran

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Frontiers of Nursing 2024年第1期11卷 99-104页

作者： armin Fereidouni Esmaeil Teymoori Tayebeh Bahmani Hamid Reza Sabet Zahra Maleki Mina Gharibi Department of Operating Room Technology Community Based Psychiatric Care Research CenterSchool of Nursing and MidwiferyShiraz University of Medical SciencesShirazIran Department of Operating Room Technology School of Paramedical SciencesAJA University of Medical SciencesTehranIran Department of Operating Room School of Allied Medical ScienceFasa University of Medical SciencesFasaIran Clinical Education Research Center Shiraz University of Medical SciencesShirazIran Medical Journalism Department School of Paramedical SciencesShiraz University of Medical SciencesShirazIran Department of Epidemiology Student Research CommitteeShiraz University of Medical SciencesShirazIran

Objective:According to the World Federation of Medical Education,critical thinking should be part of the training of medical and paramedical *** can improve the quality of care of patients after surgery by having or acquiring this skill in health ***,Emotional intelligence is introduced as an impor tant and effective factor on the professional performance and mental health of healthcare ***,the present study was designed and implemented to determine the relationship between emotional intelligence and critical thinking among operating room nursing students of medical sciences universities in ***:This cross-sectional study was done on 420 operating room students in 10 top medical sciences universities of Iran in *** sampling method in this research was multistage *** data collection instruments included demographic characteristics,Rickett's critical thinking,and Bradberry-Greaves'emotional intelligence *** receiving the ethics code,data collection was done for 2 *** data analysis,descriptive and inferential analyses including independent t-tests,analysis of variance,and Pearson correlation were *** collected data were analyzed by SPSS 18(IBM Corporation,Armonk,New York,United States).P-value<0.05 was considered ***:The mean age of the students participating in this study was 23.02±3.70 years,with women constituting 67.4%of *** results of data analysis indicated that the mean total score of critical thinking and emotional intelligence was 124.10±37.52 and 114.12±43.63,respectively.A direct significant correlation between critical thinking and emotional intelligence(r=0.459,P-value<0.001)and a significant relationship between gender and emotional intelligence(P-value=0.028)were ***:Based on the present study results,educational managers in the Ministry of Health are suggested to consider suitable educational programs for improving critical think

关键词： critical thinking emotional intelligence operating room students operating room nurses

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Advancing oxygen separation:insights from experimental and computational analysis of La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)(M=Cu,Zn)oxygen transport membranes

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Frontiers of Chemical Science and Engineering 2024年第6期18卷 17-29页

作者： Guoxing Chen Wenmei Liu Marc Widenmeyer Xiao Yu Zhijun Zhao Songhak Yoon Ruijuan Yan Wenjie Xie armin Feldhoff Gert Homm Emanuel Ionescu Maria Fyta Anke Weidenkaff Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS Alzenau 63755Germany Electrochemistry Laboratory Paul Scherrer InstituteVilligen PSI 5232Switzerland Department of Materials and Earth Sciences Materials and ResourcesTechnical University of DarmstadtDarmstadt 64287Germany Institute of Physical Chemistry and Electrochemistry Leibniz University HannoverHannover 30167Germany Institute for Computational Physics University of StuttgartStuttgart 70569Germany Computational Biotechnology RWTH AachenAachen 52074Germany

In this study,perovskite-type La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)(M=Cu,Zn)powders were synthesized using a scalable reverse co-precipitation method,presenting them as novel materials for oxygen transport *** comprehensive study covered various aspects including oxygen permeability,crystal structure,conductivity,morphology,CO_(2) tolerance,and long-term regenerative durability with a focus on phase structure and *** membrane La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)exhibited high oxygen permeation fluxes,reaching up to 0.88 and 0.64 mL·min^(−1)·cm^(−2) under air/He and air/CO_(2) gradients at 1173 K,*** 1600 h of CO_(2) exposure,the perovskite structure remained intact,showcasing superior CO_(2) resistance.A combination of first principles simulations and experimental measurements was employed to deepen the understanding of Cu/Zn substitution effects on the structure,oxygen vacancy formation,and transport behavior of the *** findings underscore the potential of this highly CO_(2)-tolerant membrane for applications in high-temperature oxygen *** enhanced insights into the oxygen transport mechanism contribute to the advancement of next-generation membrane materials.

关键词： perovskite oxygen permeation membrane oxygennionsdiffusiono xygen vacancy formation energy energy barrier

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