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Efficient control and removal of laser‑generated aerosol particles by combining water spray with pre‑injection of electrical charged mist for nuclear reactor decommissioning 认领 引用
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作者 Ruicong Xu Avadhesh Kumar Sharma +6 位作者 Zeeshan Ahmed Ravinder Kumar Laffolley Hugo Ryo Yokoyama Shuichiro Miwa Shunichi Suzuki Atsushi Kosuge 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第1期244-262,共19页
Laser-induced aerosols,predominantly submicron in size,pose significant environmental and health risks during the decommissioning of nuclear reactors.This study experimentally investigated the removal of laser-generat... Laser-induced aerosols,predominantly submicron in size,pose significant environmental and health risks during the decommissioning of nuclear reactors.This study experimentally investigated the removal of laser-generated aerosol particles using a water spray system integrated with an innovative system for pre-injecting electrically charged mist in our facility.To simulate aerosol generation in reactor decommissioning,a high-power laser was used to irradiate various materials(including stainless steel,carbon steel,and concrete),generating aerosol particles that were agglomerated with injected water mist and subsequently scavenged by water spray.Experimental results demonstrate enhanced aerosol removal via aerosol-mist agglomeration,with charged mist significantly improving particle capture by increasing wettability and size.The average improvements for the stainless steel,carbon steel,and concrete were 40%,44%,and 21%,respectively.The results of experiments using charged mist with different polarities(both positive and negative)and different surface coatings reveal that the dominant polarity of aerosols varies with the irradiated materials,influenced by their crystal structure and electron emission properties.Notably,surface coatings such as ZrO2and CeO2were found to possibly alter aerosol charging characteristics,thereby affecting aerosol removal efficiency with charged mist configurations.The innovative aerosol-mist agglomeration approach shows promise in mitigating radiation exposure,ensuring environmental safety,and reducing contaminated water during reactor dismantling.This study contributes critical knowledge for the development of advanced aerosol management strategies for nuclear reactor decommissioning.The understanding obtained in this work is also expected to be useful for various environmental and chemical engineering applications such as gas decontamination,air purification,and pollution control. 展开更多
关键词 Laser-induced aerosol generation Aerosol removal Electrically charging mist Agglomeration Water spray scavenging Reactor decommissioning
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Alterations in Growth and Yield of Camelina Induced by Different Planting Densities under Water Deficit Stress 认领 引用 被引量：2
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作者 Ejaz Ahmad Waraich Zeeshan Ahmed +4 位作者 Zahoor Ahmad Rashid Ahmad Murat Erman Fatih Cig Ayman El Sabagh 《Phyton-International Journal of Experimental Botany》 SCIE 2020年第3期587-597,共11页
Camelina(Camelina sativa L.)is famous for its oil quality and unique fatty acid pattern.Growth and yield of crops reduced under water deficit conditions.Environmental threat such as drought or water deficit condition ... Camelina(Camelina sativa L.)is famous for its oil quality and unique fatty acid pattern.Growth and yield of crops reduced under water deficit conditions.Environmental threat such as drought or water deficit condition is the emerging problem which creates the negative impact on the growth of plants.Based upon the current situation a pot study was performed in rain out-shelter to explore the effect of different plant densities(15,10 and 5 plants per pot)on growth and seed yield of two camelina genotypes under normal(100%WHC)and water deficit(60%WHC)conditions by using completely randomized design with factorial arrangement having three replicates.Results indicated that individual effects of plant densities and water deficit stress levels considerably influenced the growth and seed yield of camelina but interaction effects did not indicate any significant variation.Maximum values of leaf area index(LAI)and crop growth rate(CGR)were recorded in P3 treatment(15 plants per pot).However,maximum values of leaf area duration(LAD),net assimilation rate(NAR),yield and yield components were observed in the treatment P1(5 plants per pot).Water deficit condition(60%WHC)significantly minimized the growth,seed yield(0.82 g/m2)and yield components of camelina genotypes.Both camelina genotypes(611 and 618)did not differ significantly under water deficit conditions. 展开更多
关键词 Camelina sativa crop growth rate net assimilation rate planting density water stress
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Potential medicinal plants involved in inhibiting 3CLpro activity:A practical alternate approach to combating COVID-19 认领 引用 被引量：1
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作者 Fan Yang Xiao-lan Jiang +6 位作者 Akash Tariq Sehrish Sadia Zeeshan Ahmed Jordi Sardans Muhammad Aleem Riaz Ullah Rainer W.Bussmann 《Journal of Integrative Medicine》 SCIE CAS CSCD 2022年第6期488-496,共9页
At present,a variety of vaccines have been approved,and existing antiviral drugs are being tested to find an effective treatment for coronavirus disease 2019(COVID-19).However,no standardized treatment has yet been ap... At present,a variety of vaccines have been approved,and existing antiviral drugs are being tested to find an effective treatment for coronavirus disease 2019(COVID-19).However,no standardized treatment has yet been approved by the World Health Organization.The virally encoded chymotrypsin-like protease(3CLpro)from severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),which facilitates the replication of SARS-CoV in the host cells,is one potential pharmacological target for the development of antiSARS drugs.Online search engines,such as Web of Science,Google Scholar,Scopus and PubMed,were used to retrieve data on the traditional uses of medicinal plants and their inhibitory effects against the SARS-CoV 3CLpro.Various pure compounds,including polyphenols,terpenoids,chalcones,alkaloids,biflavonoids,flavanones,anthraquinones and glycosides,have shown potent inhibition of SARS-CoV-2 3CLpro activity with 50% inhibitory concentration(IC50)values ranging from 2-44μg/mL.Interestingly,most of these active compounds,including xanthoangelol E(isolated from Angelica keiskei),dieckol 1(isolated from Ecklonia cava),amentoflavone(isolated from Torreya nucifera),celastrol,pristimerin,tingenone and iguesterin(isolated from Tripterygium regelii),tannic acid(isolated from Camellia sinensis),and theaflavin-3,3’-digallate,3-isotheaflav1in-3 gallate and dihydrotanshinone I(isolated from Salvia miltiorrhiza),had IC50values of less than 15μg/mL.Kinetic mechanistic studies of several active compounds revealed that their mode of inhibition was dose-dependent and competitive,with Kivalues ranging from 2.4-43.8μmol/L.Given the significance of plant-based compounds and the many promising results obtained,there is still need to explore the phytochemical and mechanistic potentials of plants and their products.These medicinal plants could serve as an effective inexpensive nutraceutical for the general public to help manage COVID-19. 展开更多
关键词 COVID-19 SARS-CoV-2 Coronavirus 3C proteases Medicinal plants Plant-derived compounds Drug development
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Efficacy of Vacuum-Assisted Closure (VAC) in Wound Healing 认领 引用
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作者 Zeeshan Ahmed Najam Husain +1 位作者 Shahd Nour Sook Han Yee 《Surgical Science》 2019年第6期173-215,共43页
Introduction: Management of wounds is one of the commonest, often quite challenging as well, in surgical practice. Dressing is an essential component of wound management. Given its importance in achieving wound healin... Introduction: Management of wounds is one of the commonest, often quite challenging as well, in surgical practice. Dressing is an essential component of wound management. Given its importance in achieving wound healing and its complications, methods of dressing have been under constant review since time immemorial. Many innovative techniques of wound dressing have been introduced for quick and problem-free wound healing. Vacuum Assisted Closure (VAC) is one of such methods. Objective: To determine whether VAC can help in reducing the healing time of open wounds. Study Design: Quasi-experimental study. Setting: Department of General Surgery, Pakistan Institute of Medical Sciences, Islamabad. Patients and Methods: 120 patients with open wounds, surgical or accidental, were included in the study. They were alternatively assigned to either VAC (Group I) 2 or WMD {wet to moist dressing} (Group II). In both groups, the wounds were assessed for surface area, depth and percentage of granulation every 48 hours for 15 days. Mean change in above wound parameters at the end of study period was calculated. The difference between the two groups was statistically analyzed by applying student T test. P value less than 0.05 was considered significant. Results: In Group I, at the end of the study period, mean reduction in the wound surface area and volume was 39.4% and 60.3% respectively, while granulation tissue formation was 59.7%. In Group II, the respective figures were 26.9%, 38.2% and 24.5%. The difference between the two groups was statistically significant (P Conclusion: VAC was more effective than WMD in terms of reduction in wound surface, depth and degree of granulation tissue formation. VAC thus can be usefully employed for achieving speedy wound healing. 展开更多
关键词 Wound VAC NPWT WMD3
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世界绿洲分布数据与编目 认领 引用
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作者 桂东伟 林敬梧 +4 位作者 刘云飞 刘琦 Sameh Kotb Abd-Elmabod Zeeshan Ahmed 刘闯 《全球变化数据学报（中英文）》 CSCD 2025年第3期247-261,V0247-V0261,共15页
绿洲是干旱区荒漠基质上因稳定水源驱动形成的非地带性地理单元,是干旱区生物的重要栖息地,也是人类生产生活的基地和人类文明的重要载体。绿洲在维护干旱区陆地生态系统的稳定、防止土地退化、调节局部气候以及提升生态福祉等方面发挥... 绿洲是干旱区荒漠基质上因稳定水源驱动形成的非地带性地理单元,是干旱区生物的重要栖息地,也是人类生产生活的基地和人类文明的重要载体。绿洲在维护干旱区陆地生态系统的稳定、防止土地退化、调节局部气候以及提升生态福祉等方面发挥着关键作用。目前全球绿洲分布数字化的基础性研究和工作尚未开展,不利于绿洲科学的发展。为弥补这一缺失,本研究基于Google Earth Pro平台提供的高分辨率遥感影像数据,采用目视解译技术人工提取了全球绿洲的分布及边界范围,构建了以2020年为基准年的全球绿洲数据集,并系统性地首次完成全球绿洲编目工作。数据集共包含54个数据文件,由全球变化科学研究数据出版系统世界数据中心出版并提供共享服务,向全世界开放。研究结果显示,全球绿洲5个大洲均有分布,其中包括54个国家,总面积为2,482,193.27 km2,总数量为4,850独立绿洲分布区(块)。其中,绿洲面积最大的国家为中国,面积为275,535.39 km2,数量为1,398块。基于这一高精度数据,选取绿洲所在的大洲、国家、河流和绿洲面积这四个最能体现绿洲特征的属性,对全球绿洲进行编码,每个大于1 km2的绿洲都被赋予唯一的ID,有了明确的“身份”,填补了绿洲编目的空白。未来通过定期更新编目信息,可以精准捕捉绿洲的扩张、萎缩等动态过程,为科学评估生态系统健康状况和演变趋势提供量化依据。 展开更多
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