检索结果-南通市图书馆

Acaricidal activities of some essential oils and their monoterpenoidal constituents against house dust mite,Dermatophagoides pteronyssinus (Acari:Pyroglyphidae)

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 Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第12期7卷 957-962页

作者： saad El-Zemity HUSSIEN Rezk SAHER Farok AHMED Zaitoon Department of Pesticide Chemistry Faculty of Agriculture Alexandria University Alexandria 21-545 Egypt Department of Economic Entomology Faculty of Agriculture Alexandria University Alexandria 21-545 Egypt

The acaricidal activities of fourteen essential oils and fourteen of their major monoterpenoids were tested against house dust mites Dermatophagoides pteronyssinus. Five concentrations were used over two different time intervals 24 and 48 h under laboratory conditions. In general, it was noticed that the acaricidal effect based on LC50 of either essential oils or monoterpenoids against the mite was time dependant. The LCso values were decreased by increasing of exposure time. Clove, matrecary, chenopodium, rosemary, eucalyptus and caraway oils were shown to have high activity. As for the monoterpenoids, cinnamaldehyde and chlorothymol were found to be the most effective followed by citronellol. This study suggests the use of the essential oils and their major constituents as ecofriendly biodegradable agents for the control of house dust mite, D. pteronyssinus.

关键词： Natural acaricides Essential oils Monoterpenoids House dust mite Dermatophagoides pteronyssinus

Microbiologically influenced corrosion of 304L stainless steel caused by an alga associated bacterium Halomonas titanicae

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 Materials Science & Technology 2020年第2期37卷 200-206页

作者： Yuqiao Dong Yassir Lekbach Zhong Li Dake Xu Soumya El Abed saad Ibnsouda Koraichi Fuhui Wang Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityXiamen 361005China Laboratory of Microbial Biotechnology Faculty of Science and TechnologySidi Mohamed Ben Abdellah UniversityB.P.2202FezMorocco

Algae are reported to be corrosive,while little is known about the role of the algae associated bacteria in the corrosion *** the present study,Halomonas titanicae was isolated from a culture of an alga strain,Spirulina platensis,and identified through 16 S rRNA gene *** behavior of 304L stainless steel(SS)coupons in the presence and absence of *** was characterized by using electrochemical measurements and surface *** results showed that *** significantly accelerated the corrosion rate and decreased the pitting potential of 304L SS in the biotic *** removal of the corrosion products and biofilms,severe pitting corrosion caused by *** was *** largest pit depth after 14 d reached 6.6μm,which was 5.5 times higher than that of the sterile control(1.2μm).This is the first report revealing that an alga associated bacterium can induce microbiologically influenced corrosion(MIC),and a further concern is raised that whether algae play a role in the MIC process.

关键词： Microbiologically influenced corrosion Halomonas titanicae Pitting corrosion

Visual and refractive outcomes of posterior chamber phakic IOL in stable keratoconus

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 Ophthalmology(English edition) 2019年第5期12卷 840-843页

作者： Sherif H Emerah Moataz M Sabry Hisham A saad Waleed A Ghobashy Ophthalmology Department Research Institute of Ophthalmology Magrabi Eye Hospital Ophthalmology Department Tanta University Ophthalmology Department Suez Canal University

We evaluated the visual and refractive outcomes after phakic visian toric implantable collamer lens(ICL) insertion in stable keratoconus(KC). This retrospective study investigated toric ICL implantation in 14 eyes of 8 patients with stable KC. After 6 mo, the mean uncorrected distance visual acuity improved significantly from 0.77 to 0.15 logMAR. The mean best corrected distance visual acuity(BCDVA) improved from 0.18±0.1 to 0.15±0.1 logMAR. Fifty percent of eyes maintained their preoperative BCDVA; 42.8% gained one line. There was no statistical difference in high order or coma aberration. The mean refractive manifest spherical equivalent(MSE), mean refractive manifest spherical error, mean manifest astigmatism decreased significantly postoperatively. At 6 mo postoperatively, our achieved mean spherical equivalent was approximately 74%. No intraoperative or postoperative complications occurred. Toric ICL implantation was effective, predictable and safe to correct refractive error and improve visual acuity in patients with stable KC.

关键词： coma keratoconus lens implantation intraocular

Contemporary Study for Detection of COVID-19 Using Machine Learning with Explainable AI

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 2024年第7期80卷 1075-1104页

作者： saad Akbar Humera Azam Sulaiman Sulmi Almutairi Omar Alqahtani Habib Shah Aliya Aleryani Department of Computer Science University of KarachiKarachi75270Pakistan Department of Computing Faculty of Engineering Science and TechnologyHamdard UniversityKarachi75540Pakistan Department of Health Informatics College of Applied Medical SciencesQassim UniversityQassim51452Saudi Arabia Department of Computer Science College of Computer ScienceKing Khalid UniversityAbha61421Saudi Arabia

The prompt spread of COVID-19 has emphasized the necessity for effective and precise diagnostic *** this article,a hybrid approach in terms of datasets as well as the methodology by utilizing a previously unexplored dataset obtained from a private hospital for detecting COVID-19,pneumonia,and normal conditions in chest X-ray images(CXIs)is proposed coupled with Explainable Artificial Intelligence(XAI).Our study leverages less preprocessing with pre-trained cutting-edge models like InceptionV3,VGG16,and VGG19 that excel in the task of feature *** methodology is further enhanced by the inclusion of the t-SNE(t-Distributed Stochastic Neighbor Embedding)technique for visualizing the extracted image features and Contrast Limited Adaptive Histogram Equalization(CLAHE)to improve images before extraction of ***,an AttentionMechanism is utilized,which helps clarify how the modelmakes decisions,which builds trust in artificial intelligence(AI)*** evaluate the effectiveness of the proposed approach,both benchmark datasets and a private dataset obtained with permissions from Jinnah PostgraduateMedical Center(JPMC)in Karachi,Pakistan,are *** 12 experiments,VGG19 showcased remarkable performance in the hybrid dataset approach,achieving 100%accuracy in COVID-19 *** classification and 97%in distinguishing normal ***,across all classes,the approach achieved 98%accuracy,demonstrating its efficiency in detecting COVID-19 and differentiating it fromother chest disorders(Pneumonia and healthy)while also providing insights into the decision-making process of the models.

关键词： COVID-19 detection deep neural networks support vector machine CXIs InceptionV3 VGG16 VGG19 t-SNE embedding CLAHE attention mechanism XAI

Modulation of the intracellular inhibitory checkpoint SHP-1 enhances the antitumor activity of engineered NK cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2021年第5期18卷 1314-1316页

作者： Aviad Ben-Shmuel Guy Biber Batel Sabag Mira Barda-saad The Mina and Everard Goodman Faculty of Life Sciences Bar-Ilan UniversityRamat-Gan5290002Israel

Natural killer(NK)cells are innate lymphoid cells(ILCs)that eliminate virally infected and cancerous *** cells directly induce target cell death and release cytokines and chemokines that activate the adaptive arm of t... 详细信息

关键词： killer death lymphoid

Game Theory-Based IoT Efficient Power Control in Cognitive UAV

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7期72卷 1561-1578页

作者： Fadhil Mukhlif Norafida Ithnin Omar B.Abdulghafoor Faiz Alotaibi Nourah saad Alotaibi Information Assurance and Security Research Group(IASRG) School of ComputingFaculty of EngineeringUniversiti Teknologi MalaysiaJohorMalaysia Electronic and Telecommunication Department College of EngineeringThe American University of KurdistanIraq Faculty of Computer Science and Information Technology Universiti Putra MalaysiaSelangorMalaysia Computer Department Faculty of Applied CollegeImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia

With the help of network densification,network coverage as well as the throughput can be improved via ultra-dense networks(UDNs).In tandem,Unmanned Aerial Vehicle(UAV)communications have recently garnered much attention because of their high agility as well as widespread *** this paper,a cognitive UAV is proposed for wireless nodes power pertaining to the IoT ground ***,the UAV is included in the IoT system as the source of power for the wireless nodes as well as for resource *** quality of service(QoS)related to the cognitive node was considered as a utility function based on pricing scheme that was modelled as a non-cooperative game theory in order to maximise users’net utility ***,an energy efficiency non-cooperative game theory power allocation with pricing scheme(EE-NGPAP)is proposed to obtain an efficient power control within IoT wireless ***,uniqueness and existence of the Nash equilibrium have been demonstrated mathematically and through *** results show that the proposed energy harvest algorithm demonstrated considerable decrease in transmitted power consumption in terms of average power reduction,which is regarded to be apt with the 5Gnetworks’***,the proposed algorithm requires around 4 iterations only to converge to NE which makes the algorithm more suitable in practical heterogeneous scenarios.

关键词： UAV drones WSN IoT game theory energy efficiency 5G&B5G networks

由杂多钼酸盐前驱体制备的氧化钼催化剂催化CO_2存在下的异丁烷脱氢(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

催化学报 2012年第9期33卷 1474-1479页

作者： Ahmed AOUISSI Daif ALDHAYAN saad ALKAHTANI Chemistry Department College of ScienceKing Saud University

Molybdenum based oxide catalysts Mo-H,Mo-Fe,Mo-Ce,and Mo-Sn were prepared by calcining H3PMo12O40,Fe1.5 PMo 12O40,Ce1.5PMo12O40,and Sn1.5 PMo12O40 heteropolyanion precursors at700℃,*** prepared oxides have been characterized and tested for the dehydrogenation of isobutane(IB)to isobutene in the presence of *** effects of temperature,time on stream,and CO2 /IB ratio were *** was found that α-and-MoO3 phases were present in all *** tests showed that increasing the reaction temperature increased both the conversion and isobutene selectivity,whereas increasing the CO2 /IB molar ratio increased the conversion but decreased the selectivity for *** was found to be an effective additive element for the enhancement of catalytic activity compared with Ce and Sn.

关键词： isobutane isobutene heteropoly compound mixed oxide carbon dioxide

Realistic Smile Expression Recognition Approach Using Ensemble Classifier with Enhanced Bagging

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

Computers, Materials & Continua 2022年第2期70卷 2453-2469页

作者： Oday A.Hassen Nur Azman Abu Zaheera Zainal Abidin saad M.Darwish University Technical Malaysia Melaka Department of Information TechnologyMelaka76100Malaysia Institute of Graduate Studies and Research University of AlexandriaAlexandriaEl Shatby21526Egypt

A robust smile recognition system could be widely used for many real-world *** of a facial smile in an unconstrained setting is difficult due to the invertible and wide variety in face *** this paper,an adaptive model for smile expression classification is suggested that integrates a fast features extraction algorithm and cascade *** model takes advantage of the intrinsic association between face detection,smile,and other face features to alleviate the over-fitting issue on the limited training set and increase classification *** features are extracted taking into account to exclude any unnecessary coefficients in the feature vector;thereby enhancing the discriminatory capacity of the extracted features and reducing the computational ***,the main causes of error in learning are due to noise,bias,and *** helps to minimize these *** of multiple classifiers decrease variance,especially in the case of unstable classifiers,and may produce a more reliable classification than a single ***,a shortcoming of bagging as the best ensemble classifier is its random selection,where the classification performance relies on the chance to pick an appropriate subset of training *** suggested model employs a modified form of bagging while creating training sets to deal with this challenge(error-based bootstrapping).The experimental results for smile classification on the JAFFE,CK+,and CK+48 benchmark datasets show the feasibility of our proposed model.

关键词： Ensemble classifier smile expression detection features extraction

Epidemiology of inflammatory bowel diseases in the state of Rio Grande do Sul,Brazil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第30期28卷 4174-4181页

作者： Ornella Sari Cassol Gilmara Pandolfo Zabot Rogerio saad-Hossne Alexandre Padoin Department of Coloproctology IMED Medical SchoolPasso Fundo 99010260RSBrazil Graduate Program in Medicine and Health Sciences Pontifícia Universidade Católica do Rio Grande do Sul(PUCRS)Porto Alegre 90610001RSBrazil Department of Coloproctology Coloprocto Canoas ClinicCanoas 92310205RSBrazil Department of Coloproctology Hospital Moinhos de Vento(HMV)Porto Alegre 90035000RSBrazil Department of Surgery and Orthopaedics Universidade Estadual Paulista(UNESP)Botucatu 18618687SPBrazil

BACKGROUND This is the first study on the epidemiology of inflammatory bowel diseases(IBDs)in Rio Grande do Sul(RS),the southernmost state of Brazil with the country’s fifth largest ***’s disease(CD)and ulcerative colitis(UC)are collectively termed *** have high incidence and prevalence rates in highincome countries,although in recent years there has been a change in the classic geographical distribution of IBDs,with growing rates in traditionally lowincidence *** To estimate the incidence and prevalence of IBDs in the RS state,Brazil,between 2014 and *** This is a cross-sectional descriptive observational *** with IBD who had initiated treatment and met the inclusion criteria of the RS state free drug distribution program were *** were obtained from registration or renewal records of the RS state specialty *** male,female,and total populations were estimated according to mid-year data from the Brazilian Institute of Geography and Statistics,which served as a reference for calculating the incidence and prevalence rates of IBDs during the study *** were described using mean,standard deviation,and *** We included 1082 patients with IBD,of whom 57.5%were female and 42.5% were *** with CD accounted for 72.45% of the sample,and those with UC accounted for 27.54%.IBD prevalence during the study period was 9.51 per 100000 population,of which 6.89 corresponded to people with CD and 2.62,to people with *** rates per 100000 population/year were 2.54 in 2014,2.61 in 2015,1.91 in 2016,0.80 in 2017,0.83 in 2018,and 0.96 in *** mean IBD incidence rate per 100000 population was 1.61,of which 1.17 corresponded to CD and 0.44,to *** mean age was 41 years,and patients were mostly aged 30-40 *** by region was higher in the state capital metropolitan area:12.69 per 100000 *** Our results demonstrated an IBD prevalence of 9.51% and incidence of

关键词： Inflammatory bowel diseases Crohn’s disease Ulcerative colitis Epidemiology Incidence Prevalence