检索结果-南通市图书馆

Evaluation of the Effectiveness of Traditional and Nano Materials Used in Consolidation of Sandstone Used in Ramesses III Temple, Karnak, Egypt

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 Minerals and Materials Characterization and Engineering 2025年第1期13卷 18-30页

作者： Essam H. Mohamed Zeinab Mahmoud ahmed Mahmoud L. Abd El-Latif Department of Archaeological Conservation Faculty of Archaeology South Valley University Qena Egypt Department of Conservation Faculty of Archaeology South Valley University Qena Egypt Housing and Building Research Center Giza Egypt

This experimental study assesses the effectiveness of traditional and nano-materials in enhancing the physical and mechanical properties of deteriorated sandstone from Ramesses III Temple, Karnak, Luxor, Egypt. Treatments included Nano Estel (5%), Paraloid B-72 (3%), Paraloid B-72/Nano Estel (3%/5%), and ethyl silicates. Treated samples underwent Scanning Electron Microscopy (SEM) and physical/mechanical testing. Results show that Paraloid B-72/Nano Estel (3%/5%) yielded optimal consolidation, significantly improving sandstone’s physical and mechanical properties.

关键词： Ramesses III Temple Deteriorated Sandstone Consolidation Treatments Nano Material Physical and Mechanical Properties

Relationship between objective and subjective refraction measurements in patients with mild keratoconus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2025年第3期18卷 398-403页

作者： Masoud Khorrami-Nejad ahmed Kamil Dakhil Hesam Hashemian Masoud Sadeghi Reza Yousefi Foroozan Narooie-Noori Optometry Department School of RehabilitationTehran University of Medical SciencesTehran ***Iran Optical Techniques Department College of Health and Medical TechniquesAl-Mustaqbal UniversityBabylon 51001Iraq Translational Ophthalmology Research Center Farabi Eye HospitalTehran University of Medical SciencesTehran ***Iran

AIM:To compare objective dry retinoscopy and subjective refraction measurements in patients with mild keratoconus(KCN)and quantify any ***:This cross-sectional study was done on 68 eyes of 68 patients diagnosed with mild *** dry retinoscopy using autorefractometer and subjective refraction measurements were ***,cylinder,J0,J45,and spherical equivalent values were compared between the two ***:The mean age of 68 patients with mild KCN was 21.32±5.03y(12–35y).There were 37(54.4%)*** refraction yielded significantly more myopic sphere(-1.44 D vs-0.57 D),higher cylinder magnitude(-2.24 D vs-1.48 D),and more myopic spherical equivalent(-2.56 D vs-1.31 D)compared to subjective refraction(all P0.05).CONCLUSION:In patients with mild KCN,objective dry retinoscopy overestimates the degree of myopia and astigmatism compared to subjective *** irregular cornea in KCN likely impacts objective *** refraction allows compensation for irregularity,providing a more accurate *** determining refractive targets,the tendency of objective methods to overcorrect should be considered.

关键词： keratoconus objective refraction subjective refraction

Summary of the current guidelines for managing iatrogenic colorectal perforations and the evolving role of endoluminal vacuum therapy

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 Clinical Cases 2025年第6期13卷 1-8页

作者： ahmed Tawheed Ibrahim Halil Bahcecioglu Mehmet Yalniz Mubin Ozercan Ali Cagri Oral Mohamed El-Kassas Department of Endemic Medicine Faculty of MedicineHelwan UniversityCairo 11795Egypt Department of Gastroenterology Firat UniversityElazig 23119Türkiye Liver Disease Research Center College of MedicineKing Saud UniversityRiyadh 7805Saudi Arabia

Colonoscopy represents a safe procedure that is widely used in medical practice either to diagnose or treat various gastrointestinal *** the last few years,the incidence rate of perforations in colonoscopic procedures has increased,especially in therapeutic *** recent advancements in endoscopic techniques and gastrointestinal tumoral resection procedures such as endoscopic mucosal resection,endoscopic full-thickness resection,and endoscopic submucosal dissection(ESD)could be a risk factor for this increased *** incidence rate of mortality of serious colonoscopic perforations is 7.1%.The management plan for these perforations starts with conservative treatment in mild cases,endoscopic closure,and surgical management in severe ***,endoluminal vacuum therapy was found to be effective in the management of colorectal perforations and this has been reported in multiple case *** editorial provides an overview of the current guidelines for the management of iatrogenic colorectal *** insights are from the perspectives of endoscopists and *** also present a management algorithm based on the guidelines of the European Society of Gastrointestinal Endoscopy,the American Gastroenterological Association,and the World Society of Emergency *** also discussed in brief the use of endoluminal vacuum therapy in colorectal perforations.

关键词： Colon Rectum Iatrogenic colonic perforation Colonoscopy Guidelines Endovacuum Endolumical vacuum therapy Endoscopic management

Gut virome:New key players in the pathogenesis of inflammatory bowel disease

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 Methodology 2025年第2期15卷 27-43页

作者： Helal F Hetta Rehab ahmed Yasmin N Ramadan Hayam Fathy Mohammed Khorshid Mohamed M Mabrouk Mai Hashem Department of Medical Microbiology and Immunology Faculty of MedicineAssiut UniversityAssiut 71515Egypt Division of Microbiology Immunology and BiotechnologyFaculty of pharmacyUniversity of TabukTabuk 71491Saudi Arabia Division of Microbiology Immunology and BiotechnologyDepartment of Natural Products and Alternative MedicineFaculty of PharmacyUniversity of TabukTabuk 71491Saudi Arabia Department of Internal Medicine Division HepatogastroenterologyAssiut UniversityAssiut 71515Egypt Department of Clinical Research Egyptian Developers of Gastroenterology and Endoscopy FoundationCairo 11936Egypt Department of Internal Medicine Faculty of Medicine.Tanta UniversityTanta 31527Egypt Department of Tropical Medicine Gastroenterology and HepatologyAssiut University HospitalAssiut 71515Egypt

Inflammatory bowel disease(IBD)is a chronic inflammatory illness of the *** the mechanism underlying the pathogenesis of IBD is not fully under-stood,it is believed that a complex combination of host immunological response,environmental exposure,particularly the gut microbiota,and genetic suscept-ibility represents the major *** gut virome is a group of viruses found in great frequency in the gastrointestinal tract of *** gut virome varies greatly among individuals and is influenced by factors including lifestyle,diet,health and disease conditions,geography,and *** majority of research has focused on the significance of gut bacteria in the progression of IBD,although viral populations represent an important component of the *** conducted this review to highlight the viral communities in the gut and their expected roles in the etiopathogenesis of IBD regarding published research to date.

关键词： Inflammatory bowel disease Pathogenesis Gut virome Bacteriophage Eukaryotic viruses

Crystal Structures, Optical, Electrical and Magnetic Properties of Ca0.9Sr0.1Mn1−xMoxO3 Perovskites for the Applications of Multifunctional Devices

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 Applied Mathematics and Physics 2025年第1期13卷 61-86页

作者： Sanjana Afrin Tanvir ahmed Mithum Kumar Das Mohammad Majibur Rahman Mohammed Nazrul Islam Khan Mohammad J. Miah Department of Physics Comilla University Cumilla Bangladesh Department of EEE Bangladesh University of Business and Technology Dhaka Bangladesh Department of Environmental Sciences Jahangirnagar University Dhaka Bangladesh Materials Science Division Bangladesh Atomic Energy Commission Dhaka Bangladesh

The standard solid-state reaction method was employed to synthesize the polycrystalline Ca0.9Sr0.1Mn1−xMoxO3 (CSMMO with x = 0.00, 0.02, 0.04, 0.06, and 0.08) ceramics and each composition was sintered at 1300˚C for 4 hours. The crystal structure, microstructure, optical properties, electrical properties, complex initial permeability, and DC magnetization of the prepared compositions were carried out. The compound exhibited perovskite structure with the transformation of phase from orthorhombic symmetry for x = 0.00 to x = 0.04 samples into a tetragonal symmetry for the samples x = 0.06 and x = 0.08. The lattice constant was found to be enhanced with the doping of Mo concentration. The mean grain size was estimated in the micrometer, with values from 1.3045 to 3.0124 µm. Energy band gap (Eg) was determined for each composition and the magnitudes of Eg were lying between 1.85 - 4.00 eV. The Eg values firstly decreased with the doping content up to 2% and, then, increased for 4% to 6% Mo contents, where it again very slightly decreased for 8% Mo content. The lowest value of Eg was obtained for the x = 0.02 composition. The FTIR spectra revealed the existence of a metal oxide band in each of the prepared samples and supported the formation of a single-phase compound of synthesized material without any impurity, as confirmed by the XRD analysis. The electrical properties, such as resistivity and AC conductivity, were collected using the Impedance analyzer at room temperature. The resistivity and AC conductivity increased with the addition of dopant concentration. The frequency-dependent conductivity spectra showed three distinct regions. The complex initial permeability (μ′) was found to be enhanced with the addition of Mo and the highest value was noticed the 6% Mo dopant sample. On the other hand, the lowest loss factor was obtained for the samples x ≥ 0.06. The M-H hysteresis loops of various Ca0.9Sr0.1Mn1−xMoxO3 ceramics were measured both at room temperature (300 K

关键词： Perovskite Optical Band Gap Conductivity Permeability DC Magnetization

Capsule endoscopy:Do we still need it after 24 years of clinical use?

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 2025年第5期31卷 140-147页

作者： ahmed Tawheed Alaa Ismail Mohab S Amer Osama Elnahas Tawhid Mowafy Department of Endemic Medicine Faculty of MedicineHelwan UniversityCairo 11795Egypt Faculty of Medicine Helwan UniversityCairo 11795Egypt Department of Research SMART Company for Research ServicesCairo 11795Egypt Department of Internal Medicine Gardenia Medical CenterDoha 0000Qatar

In this letter,we comment on a recent article published in the World Journal of Gastroenterology by Xiao et al,where the authors aimed to use a deep learning model to automatically detect gastrointestinal lesions during capsule endoscopy(CE).CE was first presented in 2000 and was approved by the Food and Drug Administration in *** indications of CE overlap with those of regular diagnostic ***,in clinical practice,CE is usually used to detect lesions in areas inaccessible to standard endoscopies or in cases of bleeding that might be missed during conventional *** the emergence of CE,many physiological and technical challenges have been faced and *** this letter,we summarize the current challenges and briefly mention the proposed methods to overcome these challenges to answer a central question:Do we still need CE?

关键词： Capsule endoscopy Wireless capsule endoscopy Obscure gastrointestinal bleeding Artificial intelligence in gastroenterology Therapeutic capsule endoscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

水下爆炸作用下悬浮隧道结构设计与优化

中国公路学报 2025年第02期 47-59页

作者：罗刚严荔李文权杨云生张宇航 ahmed MD Elias 刘凤玲长安大学公路学院四川西香高速建设开发有限公司

结构的抗爆性是悬浮隧道设计中不可回避的问题，为了提高悬浮隧道结构的抗爆能力并对其结构形式进行优化，运用LS-DYNA有限元软件建立水下爆炸作用下悬浮隧道流固耦合模型，通过将二维水下爆炸冲击波映射到三维结构体上的方法，选取了... 详细信息

结构的抗爆性是悬浮隧道设计中不可回避的问题，为了提高悬浮隧道结构的抗爆能力并对其结构形式进行优化，运用LS-DYNA有限元软件建立水下爆炸作用下悬浮隧道流固耦合模型，通过将二维水下爆炸冲击波映射到三维结构体上的方法，选取了具有代表性的3种结构形式(混凝土结构、钢板+混凝土组合结构和泡沫铝+混凝土组合结构)进行悬浮隧道管体水下爆炸动力响应计算，以结构位移、压力、有效应力以及应变作为评价结构抗爆性能的指标，分析了不同结构形式和防护方式对结构抗爆性能的影响。结果表明：(1)在混凝土厚度对结构抗爆性计算分析中，当混凝土管体厚度在1.1～1.43 m范围时，悬浮隧道抗爆性能随着厚度的增加显著提高，但超过此区间，抗爆性能表现出饱和趋势，厚度对管体的抗爆性影响有限；(2)在钢板防护对结构抗爆性计算分析中，钢管混凝土结构整体防护性能要优于外侧钢板，能够有效减小高应力范围，但对位移变形范围影响不显著，内侧钢板防护并不适用于外部水下爆炸的情况，钢管混凝土应力峰值与位移峰值相比混凝土结构减小了16.10%和17.63%;(3)在外侧泡沫铝防护的抗爆性计算分析中，由于泡沫铝材料多孔隙性的特点，能够有效吸收和分散作用在管体上的爆炸能量，因此其位移峰值和应力相比混凝土结构分别减小了23.11%和25.40%,整体抗爆性能要优于其他2种防护形式。

关键词：隧道工程悬浮隧道水下爆炸抗爆性能泡沫铝钢管混凝土数值模拟

Influence of biomass density and food to microorganisms ratio on the mixed culture type I methanotrophs enriched from activated sludge

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 Environmental Sciences 2018年第8期30卷 87-96页

作者： ahmed AlSayed ahmed Fergala ahmed Eldyasti Department of Civil Engineering Lassonde School of Engineering York University

Methanotrophic based process can be the remedy to offset the wastewater treatment facilities increasing energy requirements due to methanotroph＇s unique ability to integrate methane assimilation with multiple biotechnological applications like biological nitrogen removal and methanol production. Regardless of the methanotrophic process end product, the challenge to maintain stable microbial growth in the methanotrophs cultivation bioreactor at higher cell densities is one of the major obstacles facing the process upscaling. Therefore, a series of consecutive batch tests were performed to attentively investigate the biomass density influence on type I methanotrophs bacterial growth. In addition, food to microorganisms（F/M）, carbon to nitrogen（C/N） and nitrogen to microorganisms（N/M） ratio effect on the microbial activity was studied for the first time. It was clarified that the F/M ratio is the most influencing factor on the microbial growth at higher biomass densities rather than the biomass density increase, whereas C/N and N/M ratio change, while using nitrate as the nitrogen source,does not influence methanotrophs microbial growth. These study results would facilitate the scaling up of methanotrophic based biotechnology by identifying that F/M ratio as the key parameter that influences methanotrophs cultivation at high biomass densities.

关键词： Methanotrophs Wastewater treatment Food to microorganisms ratio Biomass density

维普期刊数据库

当浪漫融于精美繁复的传统之中新德里SEEMA GUJRAL旗舰店

在线全文

学校读者我要写书评

暂无评论

室内设计与装修 2025年第2期 56-63页

作者： [印度]Renesa Architecture Design Interiors [印度]Anqa ahmed 小麦(编译) 不详

印度婚纱品牌SEEMAGUJRAL(以下称SG)的最新旗舰店近日在新德里***开业。这是一个国际知名品牌,店内展示着SG最为完整的各条精品系列线。设计师采用优雅而简约的公区设计来凸显品牌低调奢华的理念。这些公区将人们引导至不同的分区,而不... 详细信息

印度婚纱品牌SEEMAGUJRAL(以下称SG)的最新旗舰店近日在新德里***开业。这是一个国际知名品牌,店内展示着SG最为完整的各条精品系列线。设计师采用优雅而简约的公区设计来凸显品牌低调奢华的理念。这些公区将人们引导至不同的分区,而不同分区的设计也都因其展示服装的不同系列、不同风格而大相径庭。空间通过不同的视觉元素、多样的尺度比例和漏斗状的动线进行区分,即便是首次到访的顾客也可以轻松找到方向,为准新人的愉悦心情带来依托。

关键词：国际知名品牌漏斗状旗舰店视觉元素

维普期刊数据库