检索结果-南通市图书馆

Immediate and delayed micro-tensile bond strength of different luting resin cements to different regional dentin

The Journal of Biomedical Research 2013年第2期27卷 151-158页

作者： Abdelraheem mohamed Ali Ibrahim mohamed Hamouda mohamed Hamed Ghazy manal mohamed abo-madina Department of Conservative Dentistry Faculty of Dentistry Mansoura University Department of Dental Biomaterials Faculty of Dentistry Mansoura University Department of Conservative Dentistry Faculty of Dentistry Umm Al Qura University Crown & Bridge Department of Conservative Dentistry Faculty of Dentistry Mansoura University

We sought to evaluate immediate and delayed micro-tensile bond strength of Panavia F2.0 and Multilink Sprint resin cement to superficial, deep and cervical dentin. Thirty-six freshly extracted non-carious human molars were sectioned in the mesiodistal direction to expose three different dentin regions including superficial dentin （1 mm below the dentine-enamel junction）, deep dentin （1 mm above the highest pulp horn） and cervical dentin （0.5 mm above the cemento-enamel junction and 0.5 mm below the dentine-enamel junction）. Resin cements were applied on dentin surfaces and composite blocks were luted under constant seating pressure. Each group was divided into three subgroups according to time intervals. Specimens were sectioned to obtain sticks of 1 mm2 in diameter and subjected to microtensile bond strength testing at a cross head speed of 1 mrn/min. Both resin cements showed higher micro-tensile bond strength to superficial dentin than that to deep or cervical dentin （P 〈 0.001）. Micro-ten- sile bond strengths of Panavia F2.0 were higher than those of Multilink Sprint at different dentin regions （P 〈 0.001）. Immediate ＂micro-tensile bond strengths were higher than those of delayed micro-tensile bond strengths for both resin cements （P 〈 0.001）. It was concluded that resin cements with different chemical formulations and applications yield significantly different micro-tensile bond strengths to different dentin regions.

关键词： immediate and delayed micro-tensile bond strength luting resin cements regional dentin

来源：

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

Safety and efficacy of photodynamic therapy using BCECF-AM compared to mitomycin C in controlling post-operative fibrosis in a rabbit model of subscleral trabeculectomy

引用

International Journal of Ophthalmology(English edition) 2016年第3期9卷 348-356页

作者： Azza mohamed Ahmed Said Rania Gamal Eldin Zaki Thanaa Helmy mohamed manal Ibraheem Salman Department of Ophthalmology Faculty of Medicine Ain Shams University Cairo 11361 Egypt Department of Pathology Faculty of Medicine Ain Shams University Cairo 11361 Egypt

AIM： To evaluate the safety and efficacy of cellular photoablation using BCECF-AM [2, T-bis-（2-carboxyethyl） -5-（and-6）-carboxyfluorescein, acetoxymethyl ester mixed isomersl as a method to control postoperative fibrosis in subscleral trabeculectomy （SST） compared to mitomycin C （MMC） in a rabbit model. METHODS： A comparative prospective case-control animal study was conducted. Fourteen rabbits were subjected to SST with intraoperaUve use of wound modulating agents （MMC or BCECF-AM） of the right eye （study groups I and II respectively） and SST without use of intraoperative wound modulating agents for the left eye （control group II）. Two rabbits 4 eyes were considered as control group I with no surgical intervention. BCECF-AM was injected subconjunctivally 30min before surgery followed by intraoperative illumination with diffuse blue light for 10min. Antifibrotic efficacy was established by clinical response and histological examination. Clinical response was assessed by measuring intraocular pressure （lOP） at day 1, 3, 5, 7, 14, 21 postoperatively, Success was defined by 〉20.0% reduction in lOP from the preoperative values without anti-glaucoma medications. RESULTS： The mean percentage of reduction was 35.0% in the study group I with only one eye （14.3%） had 12.5% reduction. The mean percentage of reduction was 28.0% in the study group U with two eyes （28.6%） in study group II had 14.2% reduction each. Regarding the control group II, the mean percentage of reduction was 14.3% with 64.3% eyes had 〈20.0% reduction. There was a highly statistically significant difference between each of the study groups （right eyes） and the corresponding control group II （left eyes） as regards the mean postoperative lOP values started from day 5 in both study groups and this highly significant difference remained so till the end of the follow up period. Histologically, MMC treated blebs showed thinning of conjunctival epithelium with marked reduction of the goblet cells relative to con

关键词： subscleral trabeculectomy mitomycin C photodynamic therapy BCECF-AM intraocular pressure cellular photoablation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Obstacles in employing evidence-based practice by nurses in their clinical settings: a descriptive study

引用

Frontiers of Nursing 2019年第2期6卷 123-133页

作者： manal Hamed Mahmoud Zizi Fikry mohamed Abdelrasol Medical-Surgical Nursing Faculty of NursingBenha UniversityKalubia 13741Egypt Medical-Surgical Nursing Faculty of NursingDamanhour UniversityDamanhourEgypt

Objective: The challenge of employing evidence-based practice (EBP) is multifarious and varied. Nursing interventions supported by research evidence have been exposed to progress positive patient outcomes, while its implementation is faced with various obstacles. This study aimed to identify obstacles in employing EBP by nurses in their clinical settings. Methods: This descriptive design study was conducted at Benha University Hospital with a convenient sample of 154 nurses. Two tools were utilized: (Ⅰ) sociodemographic data sheet, which included sociodemographic characteristics of the participants, and (Ⅱ) interview scale, which contained two parts: (1) obstacles scale, which contained obstacles that impede nurses from the utilization of EBP, and (2) questions to rank the three greatest obstacles in employing EBP by nurses. Results: The greatest EBP obstacle ranked by nurses was the organizational limitations (90.9%), followed by research quality (86.9%) and research accessibility (51.0%), while individual characteristics (35.9%) were ranked as the least obstacle. There was a significant statistical correlation between organizational limitations, research quality as well accessibility-related obstacles and nurses' age, level of education, as well their years of work experience (P<0.05). Conclusions: Findings of this study showed series of obstacles in employing EBP by nurses in their clinical settings, stressing the call for expansion of nurses' capabilities related to EBP utilization in patients' care.

关键词： evidence-based practice clinical settings obstacles

来源：

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

Modeling and Analysis of UAV-Assisted Mobile Network with Imperfect Beam Alignment

引用

Computers, Materials & Continua 2023年第1期74卷 453-467页

作者： mohamed Amine Ouamri Reem Alkanhel Cedric Gueguen manal Abdullah Alohali Sherif S.M.Ghoneim University of Rennes 1/ADOPNET team at IRISA laboratory Rennes35000France Facultéde Technologie Laboratoire d’Informatique Médicale(LIMED)Universitéde BejaiaBejaia06000Algérie Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Electrical engineering department College of EngineeringTaif University P.O.Box 11099Taif21944Saudi Arabia

With the rapid development of emerging 5G and beyond(B5G),Unmanned Aerial Vehicles(UAVs)are increasingly important to improve the performance of dense cellular *** a conventional metric,coverage probability has been widely studied in communication systems due to the increasing density of users and complexity of the heterogeneous *** recent years,stochastic geometry has attracted more attention as a mathematical tool for modeling mobile network *** this paper,an analytical approach to the coverage probability analysis of UAV-assisted cellular networks with imperfect beam alignment has been *** assumption was considered that all users are distributed according to Poisson Cluster Process(PCP)around base stations,in particular,Thomas Cluster Process(TCP).Using thismodel,the impact of beam alignment errors on the coverage probabilitywas ***,the ProbabilityDensity Function(PDF)of directional antenna gain between the user and its serving base station was ***,association probability with each tier was achieved.A tractable expression was derived for coverage probability in both Line-of-Sight(LoS)andNon-Line-of-Sight(NLoS)condition *** results demonstrated that at low UAVs altitude,beam alignment errors significantly degrade coverage ***,for a small cluster size,alignment errors do not necessarily affect the coverage performance.

关键词： Unmanned aerial vehicles coverage analysis stochastic geometry millimeter wave imperfect beam alignment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Morphological and Phylogenetic Studies of a Copepod Species, Irodes parupenei Ho and Lin (2007), Infecting Parupeneus rubescens in Saudi Arabia

引用

Journal of Ocean University of China 2022年第2期21卷 457-464页

作者： DKHIL mohamed A ALHAFIDH Wejdan AL-QURAISHY Saleh ALOTAIBI Mashael BANAEEM manal ALSALEH Thekra ABDEL-GABER Rewaida Department of Zoology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia

Dammam City is one of the gorgeous coastal areas in the Arabian Gulf of Saudi *** present study aimed to ex-amine one of the copepod species infecting the rosy goatfish that represents a highly consumed fish species by the local population in the Arabian *** copepod species isolated from the infected fish specimens belong to the family Taeniacanthidae and was iden-tified as Irodes parupenei Ho and Lin(2007),primarily based on its morphological,morphometric,and ultrastructural characteris-tics,especially the structures of the dorsal cephalic area,segmentation of the first antenna,the absence of the maxilliped claw in the fe-male specimens,and the setation and spinulation of the legs 2-4 for the adult females are of great significance in the taxonomic *** 18S rRNA gene sequence was analyzed to ensure the precise identity and exact taxonomic status of the copepod *** result showed that this copepod species belong to Taenicanthidae and closely related to Irodes sauridi(gb|JF781550.1)in the same *** details on the specificity of the goatfish for Irodes species and identifying these parasitic taxa using molecular analysis are given in the present study.

关键词： Taenicanthidae Irodes species goatfish parasite specificity 18S rRNA gene

来源：

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

Frailty in end-stage liver disease:Understanding pathophysiology,tools for assessment,and strategies for management

引用

World Journal of Gastroenterology 2023年第46期29卷 6028-6048页

作者： Mazen Elsheikh Ahmed El Sabagh Islam B mohamed Megha Bhongade manal M Hassan Prasun Kumar Jalal Department of Gastroenterology and Hepatology Baylor College of MedicineHoustonTX 77030United States Department of Epidemiology Division of Cancer Prevention and Population SciencesThe University of TexasMD Anderson Cancer CenterHoustonTX 77030United States

Frailty and sarcopenia are frequently observed in patients with end-stage liver *** is a complex condition that arises from deteriorations across various physiological systems,including the musculoskeletal,cardiovascular,and immune systems,resulting in a reduced ability of the body to withstand *** condition is associated with declined resilience and increased vulnerability to negative outcomes,including disability,hospitalization,and *** cirrhotic patients,frailty is influenced by multiple factors,such as hyperammonemia,hormonal imbalance,malnutrition,ascites,hepatic encephalopathy,and alcohol *** frailty is crucial in predicting morbidity and mortality in cirrhotic *** can aid in making critical decisions regarding patients’eligibility for critical care and ***,in turn,can guide the development of an individualized treatment plan for each patient with cirrhosis,with a focus on prioritizing exercise,proper nutrition,and appropriate treatment of hepatic complications as the primary lines of *** this review,we aim to explore the topic of frailty in liver diseases,with a particular emphasis on pathophysiology,clinical assessment,and discuss strategies for preventing frailty through effective treatment of hepatic ***,we explore novel assessment and management strategies that have emerged in recent years,including the use of wearable technology and telemedicine.

关键词： End-stage liver disease Frailty Liver cirrhosis Malnutrition Sarcopenia

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Quantum Algorithm for Evaluating the Hamming Distance

引用

Computers, Materials & Continua 2022年第4期71卷 1065-1078页

作者： Mohammed Zidan manal G.Eldin Mahmoud Y.Shams mohamed Tolan Ayman Abd-Elhamed Mahmoud Abdel-Aty Department of Artificial Intelligence Hurghada Faculty of Computers and Artificial IntelligenceSouth Valley UniversityEgypt Faculty of Engineering King Salman International UniversitySouth SinaiEgypt Department of Mathematics and Computer Science Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt Department of Machine Learning and Information Retrieval Faculty of Artificial IntelligenceKafrelsheikh UniversityEgypt Mechanical Department Faculty of Technology and EducationSuez UniversitySuezEgypt Faculty of Technological Industries King Salman International UniversitySouth SinaiEgypt Faculty of Engineering at Mataria Helwan UniversityCairoEgypt Department of Mathematics Faculty of SciencesSohag University82524 SohagEgypt

We present a novel quantum algorithm to evaluate the hamming distance between two unknown oracles via measuring the degree of entanglement between two ancillary *** particular,we use the power of the entanglement degree based quantum computing model that preserves at most the locality of interactions within the quantum model *** model uses one of two techniques to retrieve the solution of a quantum computing problem at *** the first technique,the solution of the problem is obtained based on whether there is an entanglement between the two ancillary qubits or *** the second,the solution of the quantum computing problem is obtained as a function in the concurrence value,and the number of states that can be generated from the Boolean *** proposed algorithm receives two oracles,each oracle represents an unknown Boolean function,then it measures the hamming distance between these two *** hamming distance is evaluated based on the second *** is shown that the proposed algorithm provides exponential speedup compared with the classical counterpart for Boolean functions that have large numbers of Boolean *** proposed algorithm is explained via a case ***,employing recently developed experimental techniques,the proposed algorithm has been verified using IBM’s quantum computer simulator.

关键词： Quantum computing quantum algorithm quantum circuit

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Isolation, purification and structure elucidation of three newbioactive secondary metabolites from Streptomyces lividans AM

引用

BIOCELL 2021年第5期45卷 1263-1271页

作者： MOHAMMAD EL-METWALLY MAMDOUH ABDEL-MOGIB manal ELFEDAWY GAAD SOHSAH AHMED REZK MAHMOUD MOUSTAFA mohamed SHAABAN Botany and Microbiology Department Faculty of ScienceDamanhour UniversityDamanhour22511Egypt Chemistry Department Faculty of ScienceMansoura UniversityEl-Mansoura35516Egypt Bioprocess Development Department Genetic Engineering and Biotechnology Research InstituteCity of Scientific Research and Technological Applications(SRTA-City)New Borg El-Arab CityAlexandria21934Egypt Biology Department College of ScienceKing Khalid UniversityAbha9004Saudi Arabia Chemistry of Natural Compounds Department Division of Pharmaceutical IndustriesNational Research CentreDokki-Cairo12622Egypt Organic and Bioorganic Chemistry Department of ChemistryBielefeld UniversityBielefeld33615Germany

Microorganisms are a huge mine of bioactive metabolites,and actinomycetes are one of the very active groups in this *** this article,we are concerned about the full taxonomical characterization of Streptomyces lividans AM,isolated from Egyptian *** isolate produced three new bioactive metabolites,namely:1-Nona-decanoyl,4-oleyl disuccinate(1),filoboletic acid;(9Z,11E)-8,13-dihydroxy octadeca-9,11-dienoic acid(2),and sitosteryl-3β-D-glucoside(3).Extensive 1D and 2D NMR and HR-mass spectrometry were used to elucidate the structures of the three ***,ten known compounds were also *** antimicrobial activity of the producing organism and newly reported compounds(1–3)was investigated against a selected group of pathogenic microorganisms.A full taxonomical characterization of the strain was described as well.

关键词： Bioactive metabolites Streptomyces sp. Taxonomy Biological activity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Flavonoid chemical composition and antidiabetic potential of Brachychiton acerifolius leaves extract

引用

Asian Pacific Journal of Tropical Biomedicine 2017年第5期7卷 389-396页

作者： Aisha Hussein abou Zeid mohamed Ali Farag manal Abdel Aziz Hamed Zeinab Abdel Aziz Kandil Radwa Hassan El-Akad Hanaa mohamed El-Rafie Pharmacognosy Department National Research Centre Pharmacognosy Department College of PharmacyCairo University Therapeutic Chemistry Department National Research Centre

Objective:To evaluate Brachychiton acerifolius leaf extracts as antidiabetic potential agent and to identify the main active constituents using bioactivity guided ***:In vitro antioxidant activity was evaluated for *** different extracts using DPPH assay and vitamin C as *** activity was then determined using STZ-induced rats treated daily with ethyl acetate and 70% ethanol leaf extracts for4 weeks at a dose of 200 g/kg body weight against gliclazide reference *** glucose,a-amylase,lipid profile,liver function enzymes and oxidative stress markers were assessed along with histopathological study for liver and pancreatic *** and structural elucidation of active compounds were made using Diaion and Sephadex followed by spectral ***:The results indicated that ethyl acetate and ethanol leaf extracts exhibited the strongest antioxidant activity compared to that of vitamin C(IC500.05,0.03 and 12 mg/m L,respectively).Both extracts showed potent anti-hyperglycemic activity evidenced by a significant decrease in serum glucose levels by 82.5% and 80.9% and a-amylase by45.2% and 53.6%,as compared with gliclazide 68% and 59.4%,*** of ethanol extract resulted in the isolation of 9 flavonoids including apigenin-7-O-arhamnosyl(1/2)-b-D-glucuronide,apigenin-7-O-b-D-glucuronide,apigenin-7-O-b-Dglucoside and ***:This study highlights the potential use of *** leaf extract enriched in flavones for the treatment of diabetes that would warrant further clinical trials investigation.

关键词： STZ-induced diabetes Diaion fractionation Flavonoid glucuronides Brachychiton acerifolius

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An Energy-Efficient Multi-swarm Optimization in Wireless Sensor Networks

引用

Intelligent Automation & Soft Computing 2023年第5期36卷 1571-1583页

作者： Reem Alkanhel Kalaiselvi Chinnathambi C.Thilagavathi mohamed abouhawwash Mona A.Al duailij manal Abdullah Alohali Doaa Sami Khafaga Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Electronics and Communication Engineering Kongu Engineering CollegePerundurai638060India Department of Information Technology M.Kumarasamy College of EngineeringKarur639113India Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast LansingMI48824USA Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Information Systems Department College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia

Wireless Sensor Networks are a group of sensors with inadequate power sources that are installed in a particular region to gather information from the *** energy-efﬁcient data gathering methods in large-scale Wireless Sensor Networks(WSN)is one of the most difﬁcult areas of *** every sensor node has aﬁnite amount of *** power is the most signiﬁcant source in the *** is a well-known technique for enhan-cing the power feature in *** the proposed method multi-Swarm optimiza-tion based on a Genetic Algorithm and Adaptive Hierarchical clustering-based routing protocol are used for enhancing the network’s lifespan and routing *** using distributed data transmission modiﬁcation,an adaptive hier-archical clustering-based routing algorithm for power consumption is presented to ensure continuous coverage of the entire *** begin,a hierarchical cluster-ing-based routing protocol is presented in terms of balancing node energy *** Multi-Swarm optimization(MSO)based Genetic Algorithms are proposed to select an efﬁcient Cluster Head(CH).It also improves the network’s longevity and optimizes the *** a result of the study’sﬁndings,the pro-posed MSO-Genetic Algorithm with Hill climbing(GAHC)is effective,as it increases the number of clusters created,average energy expended,lifespan com-putation reduces average packet loss,and end-to-end delay.

关键词： Clustering energy consumption genetic algorithm multi swarm optimization adaptive hierarchical clustering routing cluster head

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：