检索结果-南通市图书馆

Asian Pacific Journal of Tropical Biomedicine 2017年第12期7卷 1071-1078页

作者： Oladayo Amed idris Olubunmi Abosede Wintola Anthony Jide Afolayan Medicinal Plants and Economic Development Research Centre Department of BotanyUniversity of Fort HareAlice5700South Africa

Objective: To evaluate the antioxidant activities and phytochemical content of the leaf and root extracts of Rumex crispus using the solvents extraction; methanol extract,ethanol extract, acetone extract(ACE), and water ***: Total flavonoids content, total phenolic content, and total proanthocyanidin were evaluated using spectrophotometric equivalents of the standards, quercetin, gallic acid and catechin respectively. The antioxidant activities of the plant extracts were determined using ABTS, DPPH, ferric reducing antioxidant power, total antioxidant capacity and nitric oxide scavenging ***: The flavonoids and phenols contents of the extracts were in the range of(19.39 ± 4.08) to(526.23 ± 17.52) mg QE/g and(16.95 ± 12.03) to(240.68 ± 3.50) mg GAE/g, respectively. ACE of the leaf has the highest value of total flavonoids content(526.23 ± 17.52) mg QE/g while ACE of the root has the highest value of total phenolic content(240.68 ± 3.50) mg GAE/g. The highest content of total proanthocyanidin(645.38 ± 1.33) mg CE/g was in ACE of the root. Significant amounts of saponin and alkaloid were also present in the root and leaf extracts. All solvent fractions showed significant antioxidant activities(P aditional medicine for the cure of helminthic infections.

关键词： Antioxidant Phytochemical Rumex crispus Helminths Treatment Scavenge

Phylogenetic relationships of native and introduced Bemisia tabaci (Homoptera:Aleyrodidae) from China and India based on mtCOI DNA sequencing and host plant comparisons

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2007年第6期17卷 645-654页

作者： Susan A.Coats Ali M.idris Judith K.Brown Department of Plant Sciences The University of ArizonaTucsonAZ 85721USA

Phylogenetic relationships for Bemisia tabaci were reconstructed by analysis of a ～780 bp fragment of the mitochondrial cytochrome oxidase I (mtCOI) gene with an emphasis on geographic range and distribution among eight eudicot plant families that are common hosts of B. tabaci worldwide to elucidate key phylogeographic linkages between populations extant in China (n=31) and India (n=34). Bootstrap values for the Maximum Parsimony tree were highly robust for all major nodes involving the major Asian clade, subgroups, and sister groups within, at 92%—100%. Between-clade distances for the Southeast Asia and three other major clades, e.g. from sub-Sahara Africa, North Africa-Mediterranean, and the Americas, were approximately >16% divergent. Two major Asian subgroups (I, II) were resolved, which represented populations indigenous to the region, comprising two (I a, I b) and five (II a—e) sister groups, respectively, which diverged by 11%. Two distinct populations from sunflower in Hyderabad grouped separately within the two Asian subgroups. All other populations grouped uniquely within Asian subgroup II or I. The "B" biotype was identified in 23 collections from China at 97.3%—99.5% nucleotide identity with "B" biotype reference sequences; it was not identified in collections from India. The majority of haplotypes were associated with 3—4 plant families, with one exception that for sister group IId (sesame, India), it might be monophagous. Thus, B. tabaci from the southeastern and near eastern regions of the Asian continent comprise of a large number of ancestral, richly divergent, mostly polyphagous populations. This region is therefore hypothesized to constitute an important Old World center of diversification for the B. tabaci complex, together with sub-Saharan Africa.

关键词： Bemisia tabaci complex cytochrome oxidase I host range phylogenetic relationship

Public health preparedness towards COVID-19 outbreak in Nigeria

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2020年第5期13卷 197-198页

作者： Jelili Olaide Mustapha Kamoru ademola adedokun idris Abdullahi Nasir Biological Science Department Faculty of ScienceUniversity of AlbertaEdmonton T6G 2E9AlbertaCanada Department of Oral Pathology DUHKing Saud University Medical CityRiyadhSaudi Arabia Department of Medical Laboratory Science Faculty of Allied Health SciencesCollege of Medical SciencesAhmadu Bello UniversityZariaNigeria

The 2019 novel coronavirus disease(COVID-19),formerly called novel Coronavirus(2019-nCoV),was discovered in December *** outbreak was declared a public health emergency of international concern(PHEIC)on 30th January 2020 by the World Health Organization(WHO).The WHO announced US$675 million fund to strengthen China and nations with weaker health systems in combating *** 18th February 2020,there has been 73332 confirmed cases with one case in Egypt[1].

关键词： COV outbreak fir

Plasmodium cynomolgi: An emerging threat of zoonotic malaria species in Malaysia?

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 Medicine 2022年第1期15卷 4-6页

作者： Nor Diyana Dian Mohd Amirul Fitri A Rahim Zulkarnain Md idris Department of Parasitology and Medical Entomology Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala LumpurMalaysia Infectious Disease Group Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala LumpurMalaysia

Malaria remains a public health problem in many parts of the *** is a disease that can endanger human life if left untreated,especially among young children and pregnant *** Malaysia,the number of malaria cases has decreased significantly since the introduction of the Malaria Elimination Program in 1961 in Malaysia Borneo,and in 1967 in Peninsular *** 1988,malaria has been on the notifiable disease list under the Communicable Diseases Act of Malaysia that mandates notification within 7 *** significant progress towards the national elimination programme and effective disease notification on malaria has resulted in zero indigenous human malaria cases in 2018[1].

关键词： malaria Malaria Plasmodium

Effect of tapping tools and date of tapping on Acacia polyacantha gum yield in South Kordofan State, Sudan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2011年第1期22卷 117-122页

作者： idris Musa adam Kamal E.M. Fadl Agricultural Research Corporation Kadugli Research Station P.O. Box 10 Kadugli Sudan Agricultural Research Corporation El-Obied Research Station P.O. Box 429 El-Obied Sudan

A study was conducted in South Kordofan, Sudan to determine the effect of tapping, tapping tools and date of tapping on the gum yield of Acacia polyacantha. A two-factor experiment was conducted for two seasons in 2008-2009. One location was used for two seasons and two locations for one season. The first factor （4 levels） was the tools of tapping： Makmak, Farrar, and Sonki, and the control which was not tapped. The second factor （2 levels） was the date of tapping that comprises mid October and mid November. These treatments were arranged in Randomaized Complete Block Design and replicated three times. Gum yield （g/tree and g/ picking） was recorded for five pickings. Economic analysis was done using the partial budget technique. The results showed highly significant （p 〈 0.01） differences on gum yield （g/picking and g/tree）. The results indicated that the process of tapping increases gum production by 88.4% and 79.8% compared with un-tapped trees, respectively. The date of tapping has no significant effect on gum yield （g/tree and g/picking） of A. polyacantha. Tapping of the tree with Makmak in mid- November was found to be economically beneficial compared to using the other tools and the control. These results could identify a new source of income for the poor farmers in South Kordofan mainly because of the wild occurrence of Kakamut as a potential gum producing tree species grown naturally in the area.

关键词： Acacia polyacantha date of tapping gum yield Kakamut South Kordofan tapping tools

Characterization of lauryl betaine foam in the Hele-Shaw cell at high foam qualities(80%-98%)

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

Petroleum Science 2020年第6期17卷 1634-1654页

作者： Asad Hassan Syed Nurudeen Yekeen Eswaran Pad.anabhan Ahmad Kamal idris Dzeti Farhah Mohshim Department of Petroleum Engineering Faculty of Geoscience and Petroleum Engineering32610 Seri IskandarPerakMalaysia Institute of Hydrocarbon Recovery Universiti Teknologi PETRONAS32610 Bandar Seri IskandarPerakMalaysia

Lauryl betaine(LB)as an amphoteric surfactant carries both positive and negative charges and should be able to generate stable foam through electrostatic interaction with nanoparticles and ***,no previous attempts have been made to investigate the influence of nanoparticles and other co-surfactants on the stability and apparent viscosity of LBstabilized *** this study,a thorough investigation on the influence of silicon dioxide(SiO2)nanoparticles,alpha olefin sulfonate(AOS)and sodium dodecyl sulfate(SDS),on foam stability and apparent viscosity was carried *** experiments were conducted with the 2D Hele-Shaw cell at high foam qualities(80%-98%).Influence of AOS on the interaction between the LB foam and oil was also *** showed that the SiO2-LB foam apparent viscosity decreased with increasing surfactant concentration from 0.1 wt%to 0.3 wt%.0.1 wt%SiO2 was the optimum concentration and increased the 0.1 wt%LB foam stability by 108.65%at 96%foam *** the presence of co-surfactants,the most stable foam,with the highest apparent viscosity,was generated by AOS/LB solution at a ratio of 9:*** emulsified crude oil did not imbibe into AOS-LB foam ***,oil was redirected into the plateau borders where the accumulated oil drops delayed the rate of film thinning,bubble coalescence and coarsening.

关键词： Foam stability Surfactant Nanoparticles Lauryl betaine Foam quality Foam apparent viscosity

Predictions of elemental composition of coal and biomass from their proximate analyses using ANFIS, ANN and MLR

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

International Journal of Coal Science & Technology 2021年第1期8卷 124-140页

作者： Abiodun Ismail Lawal adeyemi Emman Aladejare Moshood Onifade Samson Bada Musa adebayo idris Department of Mining Engineering Federal University of TechnologyAkureNigeria Oulu Mining School University of OuluOuluFinland Informetrics Research Group Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityVietnam Clean Coal and Sustainable Energy Research Group Faculty of Engineering and the Built EnvironmentUniversity of the WitwatersrandJohannesburgSouth Africa Division of Mining and Geotechnical Engineering Department of CivilEnvironmental and Natural Resources EngineeringLuleåUniversity of TechnologyLuleåSweden

The elemental composition of coal and biomass provides significant parameters used in the design of almost all energy conversion systems and *** laboratory tests to determine the elemental composition of coal and biomass is time-consuming and ***,limited research has suggested that there is a correlation between parameters obtained from elemental and proximate analyses of these *** this study,some predictive models of the elemental composition of coal and biomass using soft computing and regression analyses have been ***-one samples including parameters of elemental and proximate analyses were used during the analyses to develop multiple prediction *** variables for multiple prediction models were selected as carbon,hydrogen,and *** volatile matter,fixed carbon,moisture and ash contents as independent variables,three different prediction models were developed for each dependent parameter using ANFIS,ANN,and *** addition,a routine for selecting the best predictive model was suggested in the *** reliability of the established models was tested by using various prediction performance indices and the models were found to be ***,the developed models can be used to determine the elemental composition of coal and biomass for practical purposes.

关键词： Biomass Coal Elemental composition Proximate analysis Soft computing Regression analysis

Male-killer dynamics in the tropical butterfly, Acraea encedana （Lepidoptera： Nymphalidae）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2013年第6期20卷 717-722页

作者： Sami Saeed M. Hassan Eihab idris Michael E. N. Majerus Department of Biology Faculty of Science University of Hail Hail Kingdom of Saudi Arabia Department of Zoology Faculty of Science University of Khartoum P.O. Box 321 Khartoum 11115 Sudan Department of Genetics University of Cambridge Deceased Department of Genetics University of Cambridge Cambridge CB2 3EH United Kingdom

Sex ratio distortion in the tropical butterfly Acraea encedana is caused by infection with a male-killing bacterium of the genus Wolbachia. Previous research on this species has reported extreme female bias, high bacterial prevalences, and full sex role reversal. In this paper, we provide an assessment for the dynamics of the male-killer, based on a survey for sex ratios and Wolbachia prevalences among wild populations of A. encedana in Uganda. The study reveals that Wolbachia infection showed considerable variation over both spatial and temporal scales.

关键词： female bias PCR population dynamics prevalence Wolbachia Uganda

A Novel Binary Emperor Penguin Optimizer for Feature Selection Tasks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第3期70卷 6239-6255页

作者： Minakshi Kalra Vijay Kumar Manjit Kaur Sahar Ahmed idris Saban Oturk Hammam Alshazly Computer Science Department Government College BahadurgarhBahadurgarh124507India CSE Department National Institute of Technology Hamirpur177005India School of Engineering and Applied Sciences Bennett UniversityGreater Noida201310India College of Industrial Engineering King Khalid UniversityAbhaSaudi Arabia Department of Electrical and Electronics Engineering Amasya UniversityAmasyaTurkey Faculty of Computers and Information South Valley UniversityQena83523Egypt

Nowadays,due to the increase in information resources,the number of parameters and complexity of feature vectors *** offermore practical solutions instead of exact solutions for the solution of this *** Emperor PenguinOptimizer(EPO)is one of the highest performing meta-heuristic algorithms of recent times that imposed the gathering behavior of emperor *** shows the superiority of its performance over a wide range of optimization problems thanks to its equal chance to each penguin and its fast convergence *** traditional EPO overcomes the optimization problems in continuous search space,many problems today shift to the binary search ***,in this study,using the power of traditional EPO,binary EPO(BEPO)is presented for the effective solution of binary-nature *** algorithm uses binary search space instead of searching solutions like conventional EPO algorithm in continuous search *** this purpose,the sigmoidal functions are preferred in determining the emperor *** addition,the boundaries of the search space remain constant by choosing binary ***’s performance is evaluated over twenty-nine benchmarking *** evaluations are made to reveal the superiority of the BEPO *** addition,the performance of the BEPO algorithm was evaluated for the binary feature selection *** experimental results reveal that the BEPO algorithm outperforms the existing binary meta-heuristic algorithms in both tasks.

关键词： Metaheuristics optimization algorithms emperor penguin optimizer intensification diversification feature selection

The flow behavior of powder stearin-based methyl ester sulfonates and the effect of glidant

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2023年第9期80卷 148-156页

作者： Zulina Abd Maurad Luqman Chuah Abdullah Mohd Shamsul Anuar Nor Nadiah Abdul Karim Shah Zainab idris Malaysian Palm Oil Board 6Persiaran InstitusiBandar Baru Bangi43000SelangorMalaysia Department of Chemical and Environmental Engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia Department of Process and Food Technology Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia

The preparation and behavior of powder stearin-based methyl ester sulfonates(MES)with the addition of builder as a glidant agent was *** is an anionic surfactant and its performance is equivalent to petroleum-based linear alkylbenzene sulfonates(LAS),the workhorses of the detergent *** the same time,zeolites or soda ash were the alternative builders for non-phosphate-based *** behavior of powder MES properties was measured in terms of morphology,particle size,cohesion,caking,and *** that,these palm stearin-based MES of carbon chain 16–18 with ratios of 98:2,80:20,and 60:40 in flakes were ground using a high shear mixer by 23,000 rpm to produce powder *** the particle size of MES powder can reduce the powder's cohesion,caking,and *** addition of zeolite or soda ash as a glidant in powdered MES can improve the caking *** high stearic in MES greatly influenced getting fine particle powders and required more glidant *** powder MES with excellent powder characteristics can perform well as a bio-based cleaning product.

关键词： Methyl ester sulfonates Caking Compaction Cohesion Glidant