检索结果-南通市图书馆

Treatment of Radon Rich Bottled Water by.Granular Activated Carbon Adsorption Method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Biophy.ics 2014年第1期4卷 7-12页

作者： Saddig D. Jastaniah Bassam Z. Shakhreet hanan y. abbas Awad M. Elkhadir Saeed M. Bafaraj Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz University Jeddah KSA

We explore the use of Granular Activated Carbon (GAC) as a mitigation technique for the treatment of drinking water that was artificially.enriched with Rn-222 in laboratory.by.placing a radium rich granite stone (pitchblende) in a closed container filled with tap water for several day. in order to allow Rn-222 concentration to approach its highest possible level. Granular Activated Carbon (GAC) was immersed into the water container in order to adsorb Rn-222 in radon-rich water. The optimum activation procedure for GAC preparation was determined. Suitable contact time and optimum quantities of GAC needed to reduce Rn-222 concentration in water were experimentally.determined. There is a much greater increase in Rn-222 removal from water in the ranges from 1 part: 1000 parts to 4 parts: 1000 parts GAC/water ratios. Further increase in GAC/water ratio slowly.affects the Rn-222 removal.

关键词： Radon Mitigation Drinking Water GAC

Accuracy.of Ultrasound to Determine Gestational Age in Third Trimester

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Medical Imaging 2014年第3期4卷 126-132页

作者： Hebah A. Falatah Ibrahim A. Awad hanan y. abbas Maway.A. Khafaji Khalid G. H. Alsafi Saddig D. Jastaniah Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz University Jeddah KSA Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz UniversityJeddah KSA Department of Radiology School of Medicine King Abdulaziz University Jeddah KSA

Rapid and accurate determination of gestational age (GA) may.be vital to the appropriate care of the critically.ill pregnant patient and improve obstetric care through allowing the optimal timing of necessary.interventions and the avoidance of unnecessary.ones. Ultrasound scans are considered to be the most cost-effective, accurate and safe methods for measurement of various fetal parts in pregnant women. The aim of this research is to explore the accuracy.of ultrasound in determining gestational age of fetus in third trimesters. Data collected for all pregnant women referred to the Maternity.& Children’s Hospital in Jeddah. Only.women with single live fetus were included in this study. Women who participated in the study.were selected on following criteria: Regular menstrual cy.les, known date of last menstrual period and previous live normal neonates in multipara. All scans were performed by.a single ultrasonologist on one ultrasound machine. From collected data, it was found that out of 53 (100%) patients, 44 (84.62%) pregnant woman have different gestational age from US and last menstrual period (LMP). From this study.we can conclude that the main method to follow fetus growth in third trimester not biparietal diameter (BPD) measurement only. The BPD in third trimester is not reliable and be useless when the patient pass 30 weeks and the BPD has to be side with other measurements when we take it in later trimesters to emphasize the normal growth of fetus and avoid wrong measurement of ultrasound.

关键词： Ultrasonography GA BPD Third Trimester

Computed Tomography.Angiography.Compared to Catheter Based Angiography.in Evaluation of Cerebral Arterial Aneury.m and Arteriovenous Malformation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Medical Imaging 2014年第3期4卷 117-125页

作者： Sahar M. Badr Zuber Ahmed Maway.A. Khafaji Khalid G. H. Alsafi hanan y. abbas Saddig D. Jastaniah Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz University Jeddah KSA Department of Radiology School of Medicine King Abdulaziz University Jeddah KSA

Both cerebral arterial aneury.m and arteriovenous malformation are cerebrovascular disease, which required immediate diagnosis and urgent treatment. Since the introduction of multislice CT scanners, CT angiography.(CTA) has become a powerful tool for imaging the vascular sy.tem. The goal of this study.is to compare catheter based angiography.and CTA in the evaluation of cerebral arterial aneury.m and arteriovenous malformation AVM. A retrospective analy.is of 50 patients for exploring the record of patient who underwent both multislice CT angiography.(MSCTA) and catheter based angiography.before treatment is presented during last one y.ar in the department of Radiology. King Fahd Hospital-Jeddah, Kingdom of Saudi Arabia. The sensitivity.of CTA for picking up aneury.m is 86% and the sensitivity.of catheter based angiography.for picking up aneury.m is 97%. The specificity.of CTA for picking up aneury.m is (76%), the false positive cases are (3%) and the false negative cases are 10%. The sensitivity.of both CTA and catheter based angiography.for picking up arteriovenous malformation is (90%). The specificity.of CTA for picking up AVM is (76%), the false positive cases are (10%) and no false negative cases in CTA are found. The sensitivity.and specificity.of catheter based angiography.is 100% in diagnosis and detection of cerebral arterial aneury.m and AVM. The present study.concluded that CTA has high sensitivity.and specificity.in detecting aneury.m and AVM enough to be chosen as the first step. Catheter based angiography. still a gold standard for radiology.examination, is the most accurate, sensitive and specific method in diagnosis and detection of cerebral arterial aneury.m and arteriovenous malformation, which can be done as the second step. In addition, catheter based angiography.is done for treatment planning, treatment with interventional procedure and for prognosis after treatment.

关键词： CTA CCA Cerebral Arterial Aneury.m and Arteriovenous Malformation

Functional MRI and MR Spectroscopy.Utilization in Jeddah Hospitals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Medical Imaging 2015年第3期5卷 165-173页

作者： Lamis K. Jada Nabeel Mishah Khalid Gh. Alsafi Sarah Hagi Mawy. A. Khafaji hanan y. abbas Saddig D. Jastaniah Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz University Jeddah KSA Radiology.Department King Abdulaziz University Hospital Jeddah KSA Department of Radiology School of Medicine King Abdulaziz University Jeddah KSA

Functional magnetic resonance imaging “fMRI” and magnetic resonance spectroscopy.“MRS” are two crucial milestones that were introduced apart from one another into brain imaging and their implementation in major local cities is eventual step. Thus, the purpose of this study.was to compare those techniques in terms of their clinical utilization in patient care delivery.among the major governmental and private hospitals within Jeddah city. The study.initially.included eighteen hospitals to identify.whether they.were utilizing fMRI and MRS in their clinical practice. Out of the 18 hospitals under study.only.one hospital (5.6%) had both fMRI and MRS software;7 (38.9%) had MRS but not fMRI;4 (22.2%) did not have fMRI or MRS;and 6 (33.3%) hospitals had no MRI machine at all. Out of the eight hospitals apply.ng MRS with one being excluded, the starting date of application was 2002 in 4 (57.1%) hospitals, 2004 in 1 (14.3%) hospital, and 2006 in 2 (28.6%) hospitals. The frequency.of doing MRS was once a week in 2 (28.6%) hospitals, 2-3 cases/week in 3 (42.9%) hospitals, 5-10 cases/week in 1 (14.3%) hospital, and once every.6 months in 1 (14.3%) hospital. On the other hand, fMRI was applied only.by.one hospital starting in 2000 and was soon dismissed due to its time consumption and the inability.of patients to accurately.follow given instructions. It was concluded that MRS was more widely.utilized compared to fMRI. Later on, a follow-up survey.in the y.ar of 2014 demonstrated that MRS has started to become a standard service in most hospitals whereas fMRI was still being unrecognized.

关键词： Brain fMRI Activation MRS Metabolites

CT Optimization for Diagnosis of Some Acute Abdomen Cases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Computed Tomography 2015年第2期4卷 19-26页

作者： Saddig D. Jastaniah Alamin M. Salih Khalid Gh. Alsafi Hamad Elniel H. Elty.b Sarah Hagi Maway.A. Khafaji hanan y. abbas Mohammad Alshihri Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz University Jeddah Kingdom of Saudi Arabia Radiology.Department King Abdulaziz University Hospital Jeddah Kingdom of Saudi Arabia Department of Radiology School of Medicine King Abdulaziz University Jeddah Kingdom of Saudi Arabia

The acute abdomen is one of the most frequent causes for presentation to the emergency.department. Imaging play. an important role for an accurate diagnosis, which in turn diminishes morbidity.and mortality. The aim of this study.was to demonstrate optimum CT aspects and emphasize on the important features of CT for those patients presenting with an acute abdominal pain at the Emergency.Department both in general and in a number of selected conditions (appendicitis, small-bowel obstruction, acute pancreatitis, and diverticulitis). The reported data by.this study.are based on the author working experience, which forms a continuous protocol adjustment process. The present study.provides evidence that CT would result in definite diagnosis of patients with abdominal pain in terms of the detection of some urgent conditions.

关键词： CT Acute Abdominal Pain Appendicitis Small-Bowel Obstruction

Expanding role of antibodies in kidney.transplantation

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 Transplantation 2025年第1期15卷 57-71页

作者： Khawar abbas Muhammed Mubarak Department of Transplant Immunology Sindh Institute of Urology&TransplantationKarachi 74200SindhPakistan Javed I.Kazi Department of Histopathology Sindh Institute of Urology&TransplantationKarachi 74200SindhPakistan

The role of antibodies in kidney.transplant(KT)has evolved significantly.over the past few *** role of antibodies in KT is multifaceted,encompassing both the challenges they.pose in terms of antibody.mediated rejection(AMR)and the opportunities for improving transplant outcomes through better detection,prevention,and treatment *** our understanding of the immunological mechanisms continues to evolve,so too will the approaches to managing and harnessing the power of antibodies in KT,ultimately.leading to improved patient and graft *** narrative review explores the multifaceted roles of antibodies in KT,including their involvement in rejection mechanisms,advancements in desensitization protocols,AMR treatments,and their potential role in monitoring and improving graft survival.

关键词： Antibodies Humoral theory Kidney.transplantation Rejection

Transport mechanism in chemically.reactive hy.rid nanofluid flow containing gy.otactic micro-organisms over a curved oscillatory.surface

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN T.ASGHAR Z.abbas Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

This paper examines the transport analy.is, including both heat transfer and mass transfer, in hy.rid nanofluid flow containing gy.otactic microorganisms towards a curved oscillatory.surface. The influence of magnetic fields is also inspected in terms of their phy.ical characteristics. To depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally. the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate sy.tem, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analy.ical solution to the obtained flow equations is achieved utilizing the homotopy.analy.is method(HAM).The effects of significant flow parameters on the pressure and microorganism fields, velocity. oscillation velocity. concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analy.ed in detail. Graphical results indicate that the curves of velocity.and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

关键词：

Recent Advances in Computational Simulation of Macro-,Meso-,and Micro-Scale Biomimetics Related Fluid Flow Problems

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

Journal of Bionic Engineering 2007年第2期4卷 97-107页

作者： y. y. y.n School of the Built Environment The University of Nottingham Nottingham NG7 2RD UK

Over the last decade, computational methods have been intensively.applied to a variety.of scientific researches and engineering designs. Although the computational fluid dy.amics （CFD） method has play.d a dominant role in study.ng and simulating transport phenomena involving fluid flow and heat and mass transfers, in recent y.ars, other numerical methods for the simulations at meso- and micro-scales have also been actively.applied to solve the phy.ics of complex flow and fluid-interface interactions. This paper presents a review of recent advances in multi-scale computational simulation of biomimetics related fluid flow problems. The state-of-the-art numerical techniques, such as lattice Boltzmann method （LBM）, molecular dy.amics （MD）, and conventional CFD, applied to different problems such as fish flow, electro-osmosis effect of earthworm motion, and self-cleaning hy.rophobic surface, and the numerical approaches are introduced. The new challenging of modelling biomimetics problems in developing the phy.ical conditions of self-clean hy.rophobic surfaces is discussed.

关键词： biomimetics computational simulation macro- meso- micro-scale hy.rophobic surfaces

IMPROVEMENT OF BUBBLE MODEL FOR CAVITATING FLOW SIMULATIONS

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 Hy.rody.amics 2009年第1期21卷 41-46页

作者： TAMURA y. MATSUMOTO y. Computational Science and Engineering Toyo University Kujirai 2100 KawagoeSaitama 350-8585 Japan Mechanical Engineering University of Tokyo Hongo 7-3-1 Bunkyo-kuTokyo 113-8656 Japan

In the present research, a bubble dy.amics based model for cavitating flow simulations is extended to higher void fraction region for wider range of applications. The present bubble model is based on the so-called Ray.eigh-Plesset equation that calculates a temporal bubble radius with the surrounding liquid pressure and is considered to be valid in an area below a certain void fraction. The solution algorithm is modified so that the Ray.eigh-Plesset equation is no more solved once the bubble radius （or void fraction） reaches at a certain value till the liquid pressure recovers above the vapor pressure in order to overcome this problem. This procedure is expected to stabilize the numerical calculation. The results of simple two-dimensional flow field are presented compared with the existing bubble model.

关键词： cavitation model Computational Fluid Dy.amics (CFD) cavitation flow Ray.eigh-Plesset equation