检索结果-南通市图书馆

A review of salivary composition changes induced by fasting and its impact on health

Food Science and Human Wellness 2024年第1期13卷 50-64页

作者： Nurul Fadhilah Kamalul Aripin NIdayu Zahid Mohd Aizat abdul Rahim Hashim Yaacob Parvez I.Haris Zubaidah Haji abdRahim Rauzah Hashim School of Chemical Engineering College of EngineeringUniversiti Teknologi MARAShah Alam 40450Malaysia Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly Department of ChemistryFaculty of ScienceUniversiti MalayaKuala Lumpur 50603Malaysia Department of Oral and Craniofacial Sciences Faculty of DentistryUniversiti MalayaKuala Lumpur 50603Malaysia UMSC Dental Specialist Clinic UM Dentistry TowerUniversiti MalayaMedical CentreKuala Lumpur 50603Malaysia Leicester School of Allied Health Sciences De Montfort UniversityLeicester LE19BHUnited Kingdom Chancellery(Research and Innovation) Universiti MalayaKuala Lumpur 50603Malaysia

Human saliva is an indispensable fluid that maintains a healthy oral cavity which otherwise can lead to oral diseases(dental caries and periodontitis).In addition,salivary metabolites and microbiome profile provide early detection of systemic diseases such as cancer and *** diagnostic has gained popularity due to its non-invasive sampling ***(abstinence from food or drink or both)research for weight loss and improve health is common,but studies using fasting saliva are *** metabolites in fasting saliva have been reported with interesting results,which can be enhanced by considering different confounding *** example,fasting saliva contains higher salivary nitrite,which is related to nitric oxide(NO).NO is a vasodilator supporting the healthy function of endothelial cells and its deficiency is connected to many *** timely supply of NO through exogenous and endogenous means is highlighted and the potential advantage of fasting salivary composition changes in relation to COVID-19 infection is *** review aims to provide a general discussion on the salivary composition,properties,and functions of the whole saliva,including the health benefits of fasting.

关键词： Saliva Fasting Nitrate Nitrite Nitric oxide

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

Effect of Cyclic Stress Reduction on the Creep Characteristics of AZ91 Magnesium Alloy

引用

Acta Metallurgica Sinica(English Letters) 2015年第8期28卷 1065-1073页

作者： Alaa Farag abd el-Rehim Physics Department Faculty of Science King Khalid University Physics Department Faculty of Education Ain Shams University

The creep deformation behavior of aged AZ91 magnesium alloy under the cyclic stress reduction has been investigated in the temperature range 353–383 K. The microstructural evolution of the AZ91 magnesium alloy at different heat treatment conditions has been studied using optical microscopy and scanning electron microscopy. The minimum strain rate, e_min, was found to be higher under cyclic stress reduction condition than that under static creep condition for the same maximum stress. Cyclic creep acceleration is interpreted using the interaction of moving dislocations with the existing b-phase（Mg17Al12） precipitates. The mean value of the activation energy of secondary creep stage was found to be equal to that quoted for lattice self-diffusion of magnesium mechanism.

关键词： Magnesium alloys Microstructure Cyclic stress Dislocations

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

Sum Rate Maximization-based Fair Power Allocation in Downlink NOMA Networks

引用

Computers, Materials & Continua 2022年第6期71卷 5099-5116页

作者： Mohammed abd-elnaby Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

Non-orthogonal multiple access(NOMA)has been seen as a promising technology for 5G *** performance optimization of NOMA systems depends on both power allocation(PA)and user pairing(UP).Most existing researches provide sub-optimal solutions with high computational complexity for PA problem and mainly focuses onmaximizing the sum rate(capacity)without considering the fairness ***,the joint optimization of PA and UP needs an exhaustive *** main contribution of this paper is the proposing of a novel capacity maximizationbased fair power allocation(CMFPA)with low-complexity in downlink *** investigation and analysis of the joint impact of signal to noise ratio(SNR)per subcarrier and the channel gains of the paired users on the performance of NOMA in terms of the capacity and the user fairness is ***,a closed-form equation for the power allocation coefficient of CMFPA as a function of SNR,and the channel gains of the paired users is *** addition,to jointly optimizeUP and PAinNOMA systems an efficient low-complexity UP(elCUP)method is proposed to be incorporated with the proposed CMFPA to compromise the proposed joint resource allocation(JRA).Simulation results demonstrate that the proposed CMFPA can improve the capacity and fairness performance of existing UP methods,such as conventional UP,and random UP ***,the simulation results show that the proposed JRA significantly outperforms the existing schemes and gives a near-optimal performance.

关键词： 5G NOMA UP PA capacity fairness

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

Physical Studies of Some Hydrazinobenzoic Acid Complexes

引用

Journal of Materials Science & Technology 2005年第1期21卷 140-144页

作者： M.G.abd el Wahed S.abd el Wanees M.el Gamel S.abd el Haleem Faculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig Egypt

The stability constants of complexes of 2-hydrazinobenzoic acid and 4-hydrazinobenzoic acid with Ni (Ⅱ), Cu (Ⅱ), Zn (Ⅱ), Cd (Ⅱ), and Hg (Ⅱ) were determined potentiometricaIly at different temperatures. The thermodynamic parameters, △G0, △H0, and △S0 were calculated and proved that the complexation process is spontaneous and endothermic. The thermodynamic functions were analyzed in terms of electrostatic and non-electrostatic components and the results reveal that ionic bonds are formed between the studied ligands and metal ions. Conductometric titration was shown that the stoichiometry of the formed complexes are M:L and M:2L. The structure of the prepared solid complexes was characterized using IR, 1H NMR, 13C NMR spectroscopies as well as X-ray diffraction technique. Finally electrical conductivity of the ligands and their copper complexes was measured and shown that the ligands have a semiconductor behaviour.

关键词： Potentiometric titration Stability constants Thermodynamic parameters Structure of metal complexes

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

Serologic, endoscopic and pathologic findings in pediatric celiac disease: A single center experience in a low/middle income country

引用

World Journal of Clinical Pediatrics 2022年第3期11卷 295-306页

作者： Hala H Mansour Nabil A Mohsen Mortada HF el-Shabrawi Somia M Awad Dalia abd el-Kareem Department of Pediatrics Faculty of Medicine Kasr Al AinyCairo UniversityCairo 12411Egypt Department of Pathology Cairo UniversityCairo 11562Egypt

BACKGROUND Studies in Africa,Asia,and Latin America are needed to provide a comprehensive picture of the global incidence of celiac disease(CD).AIM To describe the serology,endoscopic and histological findings in typical and atypical presentations of pediatric CD at a tertiary referral hospital in an African low/middle income country(LMIC).METHODS This observational study was conducted on 199 patients with CD from 2010 to *** patients were divided into typical and atypical groups according to the presenting symptoms including 120 and 79 patients ***,upper gastrointestinal endoscopy with duodenal biopsy were performed for patients who had symptoms suggestive of *** severity of the intestinal damage was graded according to the histo-pathologic Marsh-Oberhuber *** Chronic diarrhea was the main intestinal presentation in the typical *** was the most common extraintestinal symptom in both the typical and atypical ***-Oberhuber type 3b and 3c was significantly higher in the seropositive patients with a P value of 0.007.A significant correlation was observed between the histological grade of the biopsied duodenal mucosa and the clinical presentation(P<0.001).Age was significantly higher in the atypical group(P value<0.001).CONCLUSION Although typical CD was observed in 120 patients in this study,the clinical variability of the condition was frequently *** only was a significant predictor for the appearance of atypical ***,CD presentations in LMIC are not different from industrialized countries.

关键词： Typical Atypical celiac disease Celiac serology Marsh-Oberhuber histopathology

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

PERIODIC MOTIONS OF SPINNING RIGID SPACECRAFT UNDER INFLUENCE OF GRAVITATIONAL AND MAGNETIC FIelDS

引用

Applied Mathematics and Mechanics(English Edition) 2006年第8期27卷 1061-1069页

作者： Yehia.a.abdel-aziz M.H.Yehia F.A.abd el-Salam M.Radwan National Research Institute of Astronomy and Geophysics Helwan. Cairo Egypt Mathematics Department Faculty of Science Mansoura University MansouraEgypt Astronomy Department Faculty of ScienceCairo UniversityCairo12613Egypt

The motion of a magnetized axisymmetric spacecraft about its center of mass in a circular orbit is considered, taking the gravitational and magnetic effects of the central body into account. Equations of motion of the reduced system are transformed to equations of plane motion of a charged particle under the action of electric and magnetic fields. Stationary motions of the system are determined and periodic motions near to them are constructed using the Lyapounoff theorem of the holomorphic integral.

关键词： periodic motions routhian rigid spacecraft

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

Deep CNN Model for Multimodal Medical Image Denoising

引用

Computers, Materials & Continua 2022年第11期73卷 3795-3814页

作者： Walid el-Shafai Amira A.Mahmoud Anas M.Ali el-Sayed M.el-Rabaie Taha E.Taha Osama F.Zahran Adel S.el-Fishawy Naglaa F.Soliman Amel A.Alhussan Fathi E.abd el-Samie Department electronics and electrical Communications Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Security Engineering Laboratory Department of Computer SciencePrince Sultan UniversityRiyadh11586Saudi Arabia Alexandria Higher Institute of Engineering&Technology(AIET) AlexandriaEgypt Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityRiyadhSaudi Arabia

In the literature,numerous techniques have been employed to decrease noise in medical image modalities,including X-Ray(XR),Ultrasonic(Us),Computed Tomography(CT),Magnetic Resonance Imaging(MRI),and Positron Emission Tomography(PET).These techniques are organized into two main classes:the Multiple Image(MI)and the Single Image(SI)*** the MI techniques,images usually obtained for the same area scanned from different points of view are used.A single image is used in the entire procedure in the SI *** denoising techniques can be carried out both in a transform or spatial *** paper is concerned with single-image noise reduction techniques because we deal with single medical *** most well-known spatial domain noise reduction techniques,including Gaussian filter,Kuan filter,Frost filter,Lee filter,Gabor filter,Median filter,Homomorphic filter,Speckle reducing anisotropic diffusion(SRAD),Nonlocal-Means(NL-Means),and Total Variation(TV),are ***,the transform domain noise reduction techniques,including wavelet-based and Curvelet-based techniques,and some hybridization techniques are ***,a deep(Convolutional Neural Network)CNN-based denoising model is proposed to eliminate Gaussian and Speckle noises in different medical image *** model utilizes the Batch Normalization(BN)and the RelU as a basic *** a result,it attained a considerable improvement over the traditional *** previously mentioned techniques are evaluated and compared by calculating qualitative visual inspection and quantitative parameters like Peak Signal-to-Noise Ratio(PSNR),Correlation Coefficient(Cr),and system complexity to determine the optimum denoising algorithm to be applied *** on the quality metrics,it is demonstrated that the proposed deep CNN-based denoising model is efficient and has superior denoising performance over the traditionaldenoising techniques.

关键词： Image enhancement medical imaging speckle noise Gaussian noise denoising filters CNN denoising

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

Gauss Gradient and SURF Features for Landmine Detection from GPR Images

引用

Computers, Materials & Continua 2022年第6期71卷 4457-4486页

作者： Fatma M.el-Ghamry Walid el-Shafai Mahmouad I.abdalla Ghada M.el-Banby Abeer D.Algarni Moawad I.Dessouky Adel S.elfishawy Fathi E.abd el-Samie Naglaa F.Soliman Department of electronics and Communications Engineering Faculty of EngineeringZagazig UniversityZagazigSharqia44519Egypt Department of electronics and electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenoufia32952Egypt Department of Industrial electronics and Control Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia

Recently,ground-penetrating radar(GPR)has been extended as a well-known area to investigate the subsurface ***,its output has a low resolution,and it needs more processing for more *** paper presents two algorithms for landmine detection from GPR *** first algorithm depends on a multi-scale technique.A Gaussian kernel with a particular scale is convolved with the image,and after that,two gradients are estimated;horizontal and vertical ***,histogram and cumulative histogram are estimated for the overall gradient *** bin values on the cumulative histogram are used for discrimination between images with and without ***,a neural classifier is used to classify images with cumulative histograms as feature *** second algorithm is based on scale-space analysis with the number of speeded-up robust feature(SURF)points as the key parameter for *** addition,this paper presents a framework for size reduction of GPR images based on decimation for efficient *** further classification steps can be performed on images after *** sensitivity of classification accuracy to the interpolation process is studied in detail.

关键词： GPR images cumulative histogram gradient image neural classifier SURF

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

Congruence Pairs of Decomposable MS-Algebras

引用

Chinese Annals of Mathematics,Series B 2021年第4期42卷 561-574页

作者： Sanaa el-ASSAR abd el-Mohsen BADAWY Department of Mathematics Faculty of ScienceTanta UniversityTantaEgypt

In this paper,the authors first introduce the concept of congruence pairs on the class of decomposable MS-algebras generalizing that for principal MS-algebras(see[13]).They show that every congruence relationθon a decomposable MS-algebra L can be uniquely determined by a congruence pair(θ_(1),θ_(2)),whereθ_(1)is a congruence on the de Morgan subalgebra L^(∞)of L andθ_(2)is a lattice congruence on the sublattice D(L)of *** obtain certain congruence pairs of a decomposable MS-algebra L via central elements of ***,they characterize the permutability of congruences and the strong extensions of decomposable MS-algebras in terms of congruence pairs.

关键词： MS-Algebras Decomposable MS-algebras Congruence pairs Strong extension Permutability Congruence lattices

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

Coronavirus Infection during Pregnancy: A 1-Year Experience among Pregnant Egyptian Women

引用

Open Journal of Obstetrics and Gynecology 2022年第5期12卷 361-374页

作者： Eman Aly abd el Fattah Faculty of Medicine Alexandria University Alexandria Egypt Department of Obstetrics and Gynecology Shatby Maternity Hospital Alexandria Egypt

Objectives: This study aimed to investigate the effect of COVID-19 on fetal well-being and perinatal outcomes. Methods: Pregnant women with documented COVID-19 infection who visited the antenatal care clinic of el Shatby Maternity Hospital, Alexandria, Egypt, from May 2020 to May 2021 were selected and classified into three groups according to the illness severity: mild, moderate, and severe. Fetal well-being was examined using the umbilical and cerebral Doppler and nonstress test (NST). The estimated fetal weight and amniotic fluid volume were also evaluated. After delivery, the neonates were evaluated through Apgar scoring at 1 and 5 min, cord blood samples, and neonatal nasopharyngeal swabs. Results: Abnormal umbilical and cerebral Doppler findings, abnormal NST results, higher incidence of cesarean section (CS) and emergency CS, and poor perinatal outcomes were observed in severe cases. Moderate and mild maternal infections had neither an adverse perinatal outcome nor an effect on the mode of delivery. Conclusion: Severe COVID-19 infection can affect the perinatal outcome.

关键词： Pregnancy COVID-19 Fetus Neonatal Infection

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：