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Effect of Catalyst on the Formation of Silica Coating on Nickel Substrate by Sol-Gel Processing

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材料热处理学报 2004年第5B期25卷 1295-1298页

作者： ali ghasemi F.Ashrafizadeh M.A.Golozar AH Ashrafi Materials Engineering Department Isfahan University of Technology Isfahan IranMaterials Engineering Department Isfahan University of Technology Isfahan IranMaterials Engineering Department Isfahan University of Technology Isfahan IranMaterials Engineering Department Isfahan University of Technology Isfahan Iran

In this research work silica coating was produced on nickel substrates by a sol-gel process. In order to increase the rate of hydrolysis and to reduce the rate of polymerization several acid catalysts including nitric acid-hydrochloric acid, acetic acid, hydrochloric acid and nitric acid were add to silica sol. Conversely, in order to control the rate of hydrolysis and to increase the rate of polymerization, basic catalyst of ammonia and ammonia hydroxyl were introduced in to the solution. Nickel specimens of known surface roughness were chemically cleaned and prepared by dipping in the sols. In order to produce a suitable silica coating the drying and firing cycles were optimized on these substrates. The structure and uniformity of the coatings produced were examined by scanning electron microscopy. Coatings composition was determined using glow discharge optical spectroscopy and EDAX microanalysis. Experimental result showed that hydrochloric acid, acetic acid, ammonia and acetic acid - ammonia are suitable catalytic agents for silica coating formation on nickel type substrate.

关键词：溶胶凝胶催化剂镍合金硅涂覆

Breaking Barriers:Selenium and Silicon-Mediated Strategies for Mitigating Abiotic Stress in Plants

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Phyton-International Journal of Experimental Botany 2023年第9期92卷 2713-2736页

作者： Mojtaba Kordrostami ali Akbar ghasemi-Soloklui Mohammad Anwar Hossain Mohammad Golam Mostofa Department of Plant Breeding Nuclear Agriculture Research SchoolNuclear Science and Technology Research Institute(NSTRI)Atomic Energy Organization of Iran(AEOI)KarajIran Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Energy Plant Research Laboratory Michigan State UniversityEast Lansing48824USA Department of Biochemistry and Molecular Biology Michigan State UniversityEast Lansing48824USA

Numerous plant species,particularly those that can accumulate selenium(Se)and silicon(Si),benefit from these essential *** and Si accumulation in plants profoundly affects several biochemical reactions in *** how plants react to Se/Si enrichment is crucial for ensuring adequate dietary Se/Si intake for humans and animals and increasing plant tolerance to environmental *** studies have shown that Se/Si-enriched plants are more resistant to salinity,drought,extreme temperatures,UV radiation,and excess *** interplay between Se/Si in plants is crucial for maintaining growth and development under normal conditions while providing a critical defense mechanism against stressors like heavy metals and *** and Si commonly stimulate antioxidant defense systems in plants exposed to environmental stressors,but the involved mechanisms are complex and not well *** ensure the positive effects of Se/Si fortification in plants,it is essential to consider the degree of accumulation,the chemical form of Se/Si used,the method of application,and the likelihood of interaction with other *** this review,we will discuss the effects of Se/Si bio-fortification on plants subjected to abiotic *** responses to exogenous Se/Si will also be reviewed,emphasizing the influences of Se/Si in the modulation of enzymatic and non-enzymatic antioxidant defense mechanisms under various abiotic stress conditions.

关键词： Antioxidants ion homeostasis oxidative stress plant nutrients ROS selenium and silicon

Application of Linear Model Predictive Control and Input-Output Linearization to Constrained Control of 3D Cable Robots

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Modern Mechanical Engineering 2011年第2期1卷 69-76页

作者： ali ghasemi 不详

Cable robots are structurally the same as parallel robots but with the basic difference that cables can only pull the platform and cannot push it. This feature makes control of cable robots a lot more challenging compared to parallel robots. This paper introduces a controller for cable robots under force constraint. The controller is based on input-output linearization and linear model predictive control. Performance of input-output linearizing (IOL) controllers suffers due to constraints on input and output variables. This problem is successfully tackled by augmenting IOL controllers with linear model predictive controller (LMPC). The effecttiveness of the proposed method is illustrated by numerical simulation.

关键词： Cable Robots Input-Output Linearization Linear model Predictive Control

Proximal tibial osteotomy for genu varum:Radiological evaluation of deformity correction with a plate vs external fixator

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World Journal of Orthopedics 2021年第3期12卷 140-151页

作者： S ali ghasemi David T Zhang Austin Fragomen S Robert Rozbruch Department of Orthopedic Surgery Hospital for Special SurgeryWeill Medical College of Cornell UniversityNew YorkNY 10021United States

BACKGROUND High tibial osteotomy(HTO)is a well-known procedure for the correction of knee *** purpose of this study was to compare the radiological results and accuracy of deformity correction performed using two different techniques:acute opening wedge correction using a plate and gradual correction with a monolateral external *** To compare of the radiological results of two different techniques:acute opening wedge correction(a plate and screw)and gradual correction(external fixator).METHODS A total of 43 patients with plates and 36 patients with external fixators were *** patients had moderate uniplanar varus *** measured radiographic parameters,including the mechanical axis deviation(MAD),medial proximal tibial angle(MPTA),Caton-Deschamps Index(CDI),posterior proximal tibial angle,and joint line obliquity angle(JLOA).The accuracy of MAD correction was calculated based on a correction goal of neutral or overcorrection for medial compartment *** Demographics including age,body mass index,sex,and preoperative deformities were similar between the *** MAD significantly improved from 23.6 mm medial to the midline(SD=8.2 mm)to 6.9 mm lateral to the midline(SD=5.4 mm)(Palignment was achieved with both the acute opening wedge technique with a plate and the gradual monolateral external

关键词： High tibial osteotomy External fixator Gradual correction Plate and screw Genu varum Radiological

Correlation of semi-quantitative findings of endolymphatic hydrops in MRI with the audiometric findings in patients with Meniere's disease

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Journal of Otology 2022年第3期17卷 123-129页

作者： Mohammad ali Kazemi ali ghasemi Jan W.Casselman Mohammad Shafiei Masoud Motasaddi Zarandy Hashem Sharifian Hassan Hashemi Kavous Firouznia Behnaz Moradi Kianosh Kasani Azin Etemadimanesh Department of Radiology Amiralam HospitalTehran University of Medical SciencesTehranIran Department of Radiology Advanced Diagnostic and Interventional Radiology Research Center(ADIR)Medical Imaging CenterImam Khomeini Hospital ComplexTehran University of Medical SciencesTehranIran Faculty of Medicine Tehran University of Medical SciencesTehranIran Department of Radiology AZ St.Jan Brugge-Oostende avCampus BruggeRuddershove 10B-8000BruggeBelgium University Ghent GentBelgium Department of Radiology AZ St.AugustinusOosterveldlaan 24B-2610AntwerpenBelgium Otorhinolaryngology Research Center Tehran University of Medical SciencesTehranIran Department of Otorhinolaryngology Amiralam HospitalTehran University of Medical SciencesTehranIran Department of Radiology Yas Complex HospitalTehran University of Medical SciencesTehranIran Bachelor of Radiology Rajaie Cardiovascular Medical and Research CenterIran University of Medical SciencesTehranIran

Purpose:To investigate the correlation between vestibular hydrops(VH),cochlearhydrops(CH),vestibular aqueduct non-visibility(VANV),and visually increased perilymphatic enhancement(VIPE)with the findings of pure-tone audiometry(PTA)in Meniere’s disease(MD)***:In this cross-sectional study,53 ears belonging to 48 patients were divided into two groups and *** group“MD patients,”there were 24 ears of 19 patients diagnosed with the definite MD(14 patients with unilateral and 5 patients withbilateral involvements).The“control group”consisted of 29 non-symptomatic ears belonging to patients diagnosed with unilateral sudden sensory-neural hearing loss or unilateral *** the patients underwent 2 sessions of temporal bone MRI using the same 3T system:an unenhanced axial T1,T2,and 3D-FLAIR MRI,an intravenous gadoliniumenhanced axial T1 fat-sat,and 4 h after the injection,an axial 3D-T2 cube and 3D-FLAIR ***,CH,VANV,and VIPE were ***,the correlation between EH indices and PTA findings(in three frequency domains of low,middle,and high)were evaluated,and the predictive value of MRI was ***:VH was significantly correlated with the hearing threshold in the low,middle,and highfrequency *** was also correlated with the hearing threshold in the low and middle ***,VIPE was not associated with hearing thresholds,and VANV was only correlated with the hearing threshold in low ***:The grade of VH,CH,and VANV were significantly correlated with the hearing thresholds in PTA.

关键词： Magnetic resonance imaging Meniere disease Endolymphatic hydrops Pure-tone audiometry

Outcomes of surgical correction of Peyronie’s disease with plaque excision and grafting: Comparison of testicular tunica vaginalis graft versus bovine pericardium graft

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Asian Journal of Urology 2024年第3期11卷 497-503页

作者： ali Eslahi Faisal Ahmed Mohammad Reza Askarpour Hossein-ali Nikbakht Iman Shamohammadi Payam ghasemi Hanieh alimardani Bahareh Ebrahimi Department of Urology School of MedicineShiraz University of Medical SciencesShirazIran Shiraz Geriatric Research Center Shiraz University of Medical SciencesShirazIran Urology Research Center Al-Thora General HospitalDepartment of UrologySchool of MedicineIbb University of Medical SciencesIbbYemen Social Determinants of Health Research Center Health Research InstituteBabol University of Medical SciencesBabolIran

Objective:Peyronie’s disease(PD)is an abnormal wound healing in the penile tunica *** fibrotic plaque excision,different graft materials have been used to repair the defects,but the optimal graft remains *** study aimed to compare the functional outcomes of testicular tunica vaginalis grafts and bovine pericardium grafts in patients with severe ***:A retrospective comparative study was conducted on 33 PD patients undergoing partial plaque excision and grafting from September 2015 to May *** patients were divided into two groups depending on the type of graft *** 15 patients in Group B,testicular tunica vaginalis grafts were used to repair the defect,while for 18 patients in Group A,bovine pericardium grafts were *** of the patient’s age,comorbidities,sexual function,penile curvature,postoperative complications,need for further treatment,change in penile length,and satisfaction were gathered and compared between the *** function was evaluated using the 5-item version of the International Index of Erectile Function(IIEF-5),and a functional less than 20-degree penile curvature after surgery was considered a successful ***:There was no difference in age,comorbidities,degree of curvature,perioperative IIEF-5,operative time,plaque size,or complication *** surgery,a statistically significant improvement in curvature degree(palis or bovine pericard

关键词： Peyronie's disease Plaqueexcision Testiculartunica vaginalis graft Bovinepericardium graft

Effect of Catalyst on the Formation of Silica Coating on Nickel Substrate by Sol -Gel Processing

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Effect of Catalyst on the Formation of Silica Coating on Nic...

14～(th) Congress of International Federation for Heat Treament and Surface Engineering

作者： ali ghasemi F.Ashrafizadeh M.A.Golozar ali Ashrafi Materials Engineering Department Isfahan University of TechnologyIsfahanIran Materials Engineering Department Isfahan University of TechnologyIsfahanIran Materials Engineering Department Isfahan University of TechnologyIsfahanIran Materials Engineering Department Isfahan University of TechnologyIsfahanIran

＜正＞ In this research work silica coating was produced on nickel substrates by a sol-gel process. In order to increase the rate of hydrolysis and to reduce the rate of polymerization several acid catalysts including nitric acid-hydrochloric acid, acetic acid, hydrochloric acid and nitric acid were add to silica sol. Conversely, in order to control the rate of hydrolysis and to increase the rate of polymerization, basic catalyst of ammonia and ammonia hydroxyl were introduced in to the solution. Nickel specimens of known surface roughness were chemically cleaned and prepared by dipping in the sols. In order to produce a suitable silica coating the drying and firing cycles were optimized on these substrates. The structure and uniformity of the coatings produced were examined by scanning electron microscopy. Coatings composition was determined using glow discharge optical spectroscopy and EDAX microanalysis. Experimental result showed that hydrochloric acid, acetic acid, ammonia and acetic acid - ammonia are suitable catalytic agents for silica coating formation on nickel type substrate.

关键词： sol-gel silica coating catalyst

来源： cnki会议评论

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白内障手术候选者的眼部生物特征参数分析

国际眼科杂志 2024年第8期24卷 1186-1193页

作者： Zahra Sarlak Masoud Khorrami-Nejad Hamed ghasemi ali Nouraeinejad Reza Yousefi 伊朗德黑兰医科大学Farabi眼科医院转化眼科研究中心 *** 伊朗德黑兰医科大学康复学院视光系 ***

目的:分析白内障手术候选人的眼部生物特征参数。方法:横断面研究。纳入2017-01/2021-09就诊于伊朗德黑兰Farabi眼科医院的4607例白内障患者(4607眼)。使用IOLMaster 700评估眼轴(AL)、角膜曲率(Kf、Ks、Km)、前房深度(ACD)。根据AL分为... 详细信息

目的:分析白内障手术候选人的眼部生物特征参数。方法:横断面研究。纳入2017-01/2021-09就诊于伊朗德黑兰Farabi眼科医院的4607例白内障患者(4607眼)。使用IOLMaster 700评估眼轴(AL)、角膜曲率(Kf、Ks、Km)、前房深度(ACD)。根据AL分为22 mm25 mm组,根据ACD分为3.00 mm3.60 mm组。结果:患者平均年龄60.3±14.1(8-95)岁,女2243例(48.69%),男2364例(51.31%)。AL、ACD和平均角膜曲率范围分别为23.1-23.4 mm、3.1-3.2 mm和44.50-45.00 D。AL>25 mm组ACD平均值显著高于22 mm≤AL≤25 mm组和22 mm3.60 mm组的平均AL显著高于3.00 mm25 mm组的Kf、Ks、Km均值显著高于ACD>3.60 mm组和22 mm

关键词：白内障眼轴前房深度角膜曲率

Using the Hg_xMg_(1-x)Te ternary compound as a room temperature photodetector: The electronic structure, charge transport, and response function of the energetic electromagnetic radiation

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Chinese Physics B 2018年第5期27卷 143-149页

作者： ghasemi Hasan Mokhtari ali Department of Physics Faculty of SciencesShahrekord University

In the present work, firstly, a first-principles study of the structural, electronic, and electron transport properties of the HgxMg1-xTe（HMT） ternary compound is performed using the ABINIT package and the results are compared with Cd0.9Zn0.1 Te（CZT） as a current room-temperature photodetector. Next, the response functions of Hg0.6Mg0.4Te and Cd0.9Zn0.1Te under electromagnetic irradiation with 0.05 Me V, 0.2 MeV, 0.661 MeV and 1.33 MeV energies are simulated by using the MCNP code. According to these simulations, the Hg0.6Mg0.4Te ternary compound is suggested as a good semiconductor photodetector for use at room temperature.

关键词： band gap charge-carrier transport photodetector density functional theory