检索结果-南通市图书馆

Assessment of effect of hydroalcoholic and decoction methods on extraction of antioxidants from selected Indian medicinal plants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2012年第3期2卷 195-202页

作者： Mital Kaneria Bhavana Kanani Sumitra chanda Phytochemical Pharmacological and Microbiological LaboratoryDepartment of BiosciencesSaurashtra University

Objective:To assess the effects of extraction methods on antioxidant activities of selected Indian medicinal ***:Different parts of plants were extracted by hydroalcoholic and decoction methods using water and various concentrations of methanol(ME) viz.75%, 50%and 25%*** antioxidant activity of all the different extracts was evaluated using two different antioxidant assays viz.2,2-diphenyl-1-picryl hydrazyl(DPPH) free radical scavenging assay and superoxide anion radical scavenging *** phenol and flavonoid content was also ***:The results showed that the extracting solvent significantly altered the antioxidant property estimations of screened *** correlations between phenolic compositions and antioxidant activities of extracts were *** levels of antioxidant activities were detected in Manilkara zapota(***) as compared with other screened plants. Conclusions:The results obtained appear to confirm the effect of different methods on extraction of antioxidants and antioxidant property of ***.

关键词： Antioxidant Hydroalcoholic extraction Total phenol content DPPH Superoxide Manilkara zapota

A retrospective evaluation of the quality of malaria case management at twelve health facilities in four districts in Zambia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2014年第6期4卷 498-504页

作者： Pascalina chanda-Kapata Emmanuel chanda Freddie Masaninga Annette Habluetzel Felix Masiye Ibrahima Soce Fall Ministry of Health HeadquartersNdeke HouseP.O.Box 30205LusakaZambia Ministry of Health National Malaria Control Centre World Health Organisation WHO Country Office University of Camerino School of Pharmacy University of Zambia Main CampusLusaka.Zambia World Health Organization

Objective:To establish the appropriateness of malaria case management at health facility level in four districts in ***:This study was a retrospective evaluation of the quality of malaria case management at health facilities in four districts conveniently sampled to represent both urban and rural settings in different epidemiological zones and health facility *** review period was from January to December *** sample included twelve lower level health facilities from four *** Pearson Chi-square test was used to identify characteristics which affected the quality of case ***:Out of 4891 suspected malaria cases recorded at the 12 health facilities,more than 80%of the patients had a temperature taken to establish their fever *** 67%(CI_(95)66.1-68.7)were tested for parasitemia by either rapid diagnostic test or microscopy,whereas the remaining22.5%(CI_(95)213.1-23.7)were not subjected to any malaria *** the 2247 malaria cases reported(complicated and uncomplicated),71%were parasitologicaily confirmed while 29%were clinically diagnosed(unconfirmed).About 56%.(CI_(95)53.9-58.1)of the malaria cases reported were treated with artemether-lumefantrine(AL),35%(CI_(95)33.1-37.0)with sulphadoxine-pyrimethamine,8%(CI_(95)6.9-9.2)with quinine and 1%did not receive any *** 30%of patients WHO were found negative for malaria parasites were still prescribed an anti-malarial,contrary to the *** were marked inter-district variations in the proportion of patients in WHOm a diagnostic tool was used,and in the choice of anti-malarials for the treatment of malaria confirmed *** between health worker characteristics and quality of case malaria management showed that nurses performed better than environmental health technicians and clinical officers on the decision whether to use the rapid diagnostic test or ***,in service training on malaria,years of residence in the distr

关键词： Malaria Quality Diagnosis Treatment Antimalarials Microscopy Rapid diagnostic tests Zambia

Covert infrared image encoding through imprinted plasmonic cavities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2018年第1期7卷 174-181页

作者： Daniel Franklin Sushrut Modak Abraham Vázquez-Guardado Alireza Safaei Debashis chanda Department of Physics University of Central Florida4111 Libra DrivePhysical Sciences Bldg.430OrlandoFL 32816USA NanoScience Technology Center University of Central Florida12424 Research Parkway Suite 400OrlandoFL 32826USA CREOL The College of Optics and PhotonicsUniversity of Central Florida4304 Scorpius St.OrlandoFL 32816USA

Functional surfaces that can control light across the electromagnetic spectrum are highly *** nanostructures can assume this role by exhibiting dimension-tunable resonances that span multiple electromagnetic ***,changing these structural parameters often impacts the higher-order resonances and spectral features in lower-wavelength *** this study,we discuss a cavity-coupled plasmonic system with resonances that are tunable across the 3–5 or 8–14μm infrared bands while retaining near-invariant spectral properties in the visible *** result is accomplished by regime-dependent resonance mechanisms and their dependence on independent structural *** the identification and constraint of key parameters,we demonstrate multispectral data encoding,where images,viewable in the infrared spectral domain,appear as uniform areas of color in the visible domain—effectively hiding the *** by large area nanoimprint lithography and compatible with flexible surfaces,the proposed system can produce multifunctional coatings for thermal management,camouflage,and anti-counterfeiting.

关键词： visible system assume

Tuberculosis in the mines of Zambia:A case for intervention

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2016年第9期6卷 803-807页

作者： Pascalina chanda-Kapata Doris Osei-Afriyie Connrad Mwansa Nathan Kapata Department of Disease Surveillance Control and Research Ministry of Health Department of Occupational Health Occupational Health and Safety Institute Department of Diseases Surveillance Control and Research National TB/Leprosy Control ProgramMinistry of Health

Zambia is among the sub-Saharan countries highly burdened with tuberculosis(TB) and has an estimated prevalence rate of 638 per 100 000 population in those aged 15 years and *** mining industry is the main contributor to the country's gross national product,although it is associated with public health challenges,with TB in the mines being among the occupational health diseases having a negative economic impact and threatening to delay the control of TB in the *** reviewed available evidence on the extent of the burden of TB in the mines so as to inform the development of targeted interventions for the post-2015 End TB *** was a review of published data from Medline/Pubmed,Cochrane Library and Embase,including unpublished "grey"literature on the burden of TB and the risk factors of TB in the mines of *** is limited research in Zambia to fully understand the burden of TB and risk factors associated with TB in the ***,the few studies and data available have shown that TB is a significant health problem requiring interventions to improve the quality of life of miners,ex-miners and surrounding *** is a potential problem in the mines of Zambia and the actual burden needs to be *** to silica as a risk factor needs further investigation.

关键词： Tuberculosis Zambia Occupational health diseases Silica Mines

From public to private solid waste management:Stakeholders’perspectives on private-public solid waste management in Lobatse,Botswana

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Population,Resources and Environment 2020年第1期18卷 42-48页

作者： Nametso D.Phonchi-Tshekiso Gagoitseope Mmopelwa Raban chanda Okavango Research Institute University of BotswanaP/Bag 285MaunBotswana Department of Environmental Science University of BotswanaGaboroneBotswana

Upon the realization that urban areas can only achieve sustainable solid waste management systems through an interplay of partnerships and stakeholders,developing countries have geared themselves towards the privatization of waste management services in efforts to reduce costs and improve ***,a town located in the south of Botswana,faces the increasing challenges of poor waste management due to the lack of finances and resources available to the Lobatse Town Council,which hinders efforts towards a sustainable waste management *** has negative implications for public health and the environment,as a result of solid waste pollution from littering and the illegal dumping of *** work examines the current state of solid waste management and its challenges in Lobatse,within the context of the interplay between public and private solid waste *** study aims to perform a social exploration of the efficiency of waste management services,considering the political economy and households’perceptions towards these *** stakeholders were interviewed and a social survey of 222 households was conducted to generate primary *** findings indicate that the involvement of the private sector yielded positive outcomes,as it increased the solid waste collection frequency and improved the quality of the waste management *** of the stakeholders were in favor of privatization,and the households were satisfied and willing to contribute towards the cost recovery of solid waste *** is,therefore,recommended to promote and establish a private-public-community partnership in the town to improve the quality of the waste management system.

关键词： Political economy Private vs public service Solid waste management

Field evaluation of KO-Tab 1-2-3<sup>®</sup>long lasting insecticidal net performance in Milenge, Zambia

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Biomedical Science and Engineering 2013年第7期6卷 4-10页

作者： Emmanuel chanda Alister Kandyata Javan chanda Pascalina chanda-Kapata Ministry of Health National Malaria Control Centre Lusaka Zambia Ministry of Health National Malaria Control Centre Lusaka Zambia Department of Biomedical Sciences School of Medicine University of Zambia Lusaka Zambia Ministry of Health National Malaria Control Centre Lusaka Zambia Department of Biological Sciences School of Natural Sciences University of Zambia Lusaka Zambia Ministry of Health Ndeke House Lusaka Zambia

Insecticide treated nets (ITNs) play a pivotal role in the prevention and control of malaria. Conversely, inadequate levels of ownership, utilization and durability invariably compromise their efficacy. Operational performance of the KO-Tab 1-2-3 Long Lasting Insecticidal Nets (LLINs) was assessed using the World Health Organization (WHO) standard entomological and epidemiological procedures, and a pretested structured questionnaire. The median knock down time for Anopheles funestus s.l. was 30 minutes (95% CI 26.3 - 34.0). Post exposure mean mortality rates were 34% at one hour and 80.0% at 24 hours (OR = 0.13, P = 0.00002). Children between the ages of 1 - 4 years old exhibited higher false positives as compared to the 5 - 15 years age groups (OR = 0.10, P = 0.0006). Parasite prevalence varied between rapid diagnostic tests (RDTs) (40.4%) and microscopy (31.3%) (OR = 0.67, P = 0.2825) with 9.2% discordant RDT false positives. All malaria positive children were Plasmodium falciparum mono-infections. Hospital admissions reduced by 28% between 2005 and 2008, with case fatality rates reducing by 19% between 2006 and2007 inchildren under five years. No marked heterogeneity between LLINs ownership (66%) and utilization (48.3%) was observed (OR = 0.49, P = 0.0978). There was complete (100%) community level knowledge of KO-Tab 1-2-3 LLINs. The study provides evidence of potential of KO-Tab 1-2-3 LLINs for operational scale distribution, and substantiates the need for further longitudinal studies to monitor their insecticidal and physical durability.

关键词： Long Lasting Insecticidal Nets Malaria Vector Control Field Evaluation Zambia

可重复使用CuO纳米粒子催化微波辅助的腈和NaN_3环加成反应合成5-取代1H-四唑类（英文）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2017年第11期38卷 1918-1924页

作者： R. D. Padmaja Sourav Rej Kaushik chanda 韦洛尔大学高等科学学院化学系印度韦洛尔632014 生物工程与纳米技术研究所新加坡138669

将可重复使用的CuO纳米粒子成功用于催化微波辅助的腈和NaN_3[3+2]环加成反应高效合成5-取代1H-四唑类化合物.该法突出特点为成本低、合成快、稳定性高、可重复使用、反应条件温和、无需任何添加物、官能团兼容性好和产率高.这种环境友... 详细信息

将可重复使用的CuO纳米粒子成功用于催化微波辅助的腈和NaN_3[3+2]环加成反应高效合成5-取代1H-四唑类化合物.该法突出特点为成本低、合成快、稳定性高、可重复使用、反应条件温和、无需任何添加物、官能团兼容性好和产率高.这种环境友好的微波辅助纳米粒子催化合成策略可望替代现有的涉及常规路易斯酸催化剂方法,以及作为一种简易的合成特殊化合物的方法.

关键词：四唑类氧化铜纳米粒子 (3+2)环加成绿色化学微波辐射

Multiple Response Optimization of Dimensional Accuracy of Nimonic Alloy Miniature Gear Machined on Wire Edm Using Entropy Topsis Andpareto Anova

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2021年第1期126卷 241-259页

作者： Tina Chaudhary Arshad Noor Siddiquee Arindam Kumar chanda Shafi Ahmad Irfan Anjum Badruddin Zahid A.Khan Department of Mechanical and Automation Engineering Indira Gandhi Delhi Technical University for WomenKashmere Gate110006India Department of Mechanical Engineering Jamia Millia Islamia(A Central University)New Delhi110025India Department of Mechanical and Automation Engineering G.B.Pant Engineering CollegeNew Delhi110020India Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha-61421AsirSaudi Arabia

The purpose of this research is to obtain the optimum cutting parameters to achieve the dimensional accuracy of Nimonic alloy miniature gear manufactured using Wire *** cutting parameters investigated in this study are current,pulse on time(PON),pulse off time(POFF),wire tension(WT)and dielectric *** glycol,nanopowder of alumina and oxygen are mixed to demineralized water to prepare novel dielectric *** in inner diameter,deviation in outer diameter,deviation in land and deviation in tooth width are considered to check the dimensional *** L_(16) is employed for experimental design and multiple response optimization is performed using Entropy TOPSIS and Pareto *** indicate that pulse on time is the most notable parameter for good dimensional accuracy followed by dielectric fluid,current,pulse off time and wire *** glycol mixed demineralized water is preferred for low dimensional *** optimum WEDM parameters are pulse on time at 20μs,Ethylene glycol mixed demineralized water dielectric fluid,current at 3 A,pulse off time at 4μs,and wire tension at 18 N.

关键词： Miniature gear multiple optimization dimensional accuracy entropy TOPSIS Pareto ANOVA

Development of underground mine monitoring and communication system integrated ZigBee and GIS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2015年第5期25卷 811-818页

作者： Moridi Mohammad Ali Kawamura Youhei Sharifzadeh Mostafa chanda Emmanuel Knox Wagner Markus Jang Hyongdoo Okawa Hirokazu Department of Mining Engineering and Metallurgy Engineering Western Australian School of MinesCurtin University School of Civil Environment and Mining EngineeringThe University of Adelaide School of Computer Science The University of Adelaide Graduate School of Engineering and Resource Science Department of Materials-Process Engineering and Applied Chemistry EnvironmentAkita University

An automated underground mine monitoring and communication system based on the integration of new technologies is introduced to promote safety and health,operational management and *** proposed system integration considering Wireless Sensor Network(WSN) assisted Geographic Information System(GIS) enables to monitor and control underground mining applications from surface *** on the capabilities of WSNs,ZigBee network is adapted for near real-time monitoring,ventilation system control and emergency communication in underground *** nodes were developed to sense environmental attributes such as temperature,humidity and gases concentration;switching ON and OFF ventilation fans;and texting emergency messages.A trigger action plan for monitored attributes above normal and threshold value limits is programmed in the surface GIS management *** is designed to turn the auxiliary fans on remotely or automatically in orange condition and sending evacuation messages for underground miners in unsafe(red) ***-users operation and 3D visualisations are other successful achievements of the proposed system for the underground monitoring and communication.

关键词： ZigBee 矿井监控通信系统 GIS 统集成无线传感器网络井下通风系统地理信息系统