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2380篇 您的检索式:作者名="HOSSEINI"
    题名 作者 年代 出处 被引量
1Corrosion Protection of Electro-Galvanized Steel by Green Conversion Coatings显示文摘A cerium-based chemical conversion process was studied. First, zinc coating obtained from a free-cyanide alkaline bath, with derivative of imidazol with new brightener, was investigated, zinc-plated steel specimens were treated with a solution of 50 mmol·L-1 Ce(NO3)3. The corrosion behavior of bare and treated mild galvanized steel was evaluated during exposure to 0.5 mol·L-1 NaCl for different immersion time, using Tafel polarization curves and electrochemical impedance spectroscopy (EIS) measurements. The surface morphology of the coating was studied using scanning electron microscopy (SEM). The composition and chemical percent of the coating were examined by X-ray dispersion energy (EDAX). The results of these measurements showed that the newly developed cerium-based conversion coating process was a promising candidate for replaciog the conventional chromate treatments used at present for galvanized steel.Mirghasem Hosseini Habib Ashassi-Sorkhabi Heshmat Allah Yaghobkhani Ghiasvand 2007Journal of Rare Earths2007,25,5:29
2蛋白质糖基化修饰研究进展显示文摘蛋白质翻译后修饰是蛋白质组学的一个组成部分,而蛋白质糖基化是生命体中最重要的一种蛋白质翻译后修饰之一。糖基化在细胞免疫、信号传导、蛋白翻译调控、蛋白降解等诸多生物过程中起着重要作用。随着蛋白质组学技术的不断发展,糖基化研究也越来越受到广泛的关注。本文综述了糖基化的分类、在生命体中的作用、最新的研究技术及进展。李军 杜鑫 Hosseini Moghaddam S.H. 陈玉银 2009科技通报2009,25,6:26
3Efficacy of premedication with activated Dimethicone or N-acetylcysteine in improving visibility during upper endoscopy显示文摘AIM:To assess the efficacy of N-acetylcysteine(NAC) and activated Dimethicone in improving endoscopic mucosal visibility.METHODS:A total of 148 patients were randomly allocated into four groups to receive one of the following premedications:group A:100 mL water alone;group B:activated Dimethicone plus water(up to 100 mL);group C:NAC plus water(up to 100 mL);and group D:activated Dimethicone and NAC plus water(up to 100 mL).A single endoscopist blinded to the patients group assessed the gastric mucosal visibility scores(range 1-4) at four sites.The sum of the scores from the four sites was considered as the total mucosal visibility score(TMVS).RESULTS:The patients in group B showed a significantly lower TMVS than those of groups A and C(P < 0.001).The TMVS in patients of group D was significantly lower than that of groups A and C(P < 0.001).The TMVS did not significantly differ between groups B and D(P > 0.05).The difference between TMVS of groups C and A was not significant(P > 0.05).CONCLUSION:Premedication with activated Dimethicone 20 min prior to the upper endoscopy leads to the best visibility.NAC does not improve visualization by itself.Seyed Mohammad Kazem Hosseini Asl Gholam Reza Sivandzadeh 2011World Journal of Gastroenterology2011,17,37:15
4Stress-strain behavior of plastic concrete using monotonic triaxial compression tests显示文摘The mechanical behavior of plastic concrete used in the cut-off walls of earth dams has been studied.Triaxial compression tests on the specimens in various ages and mix designs under different confining pressures have been done and the stress-strain behavior of such materials and their strength parameter changes have been experimentally investigated.It has been observed that increasing the confining pressures applied on the specimens causes the material behavior to be alike the more ductile materials and the compressive strength increases considerably as well.Moreover,a parametric study has been carried out to investigate the influence of essential parameters on the shear strength parameters of these materials.According to the research,increasing the coarse to fine aggregates ratio leads to the increase of compressive strength of the specimens as well as the increase of the cohesion and internal friction angle of the materials.Furthermore,the bentonite content decrease and the cement factor increase result in an increase of the cohesion parameter of plastic concretes and decrease of the internal friction angle of such materials.Y.Pashang Pisheh S.M.Mir Mohammad Hosseini 2012Journal of Central South University2012,19,4:13
5丝胶茧蚕品种选育初报显示文摘利用家蚕资源库中的突变基因,初步育成了丝胶茧蚕品种。导入了与活性物质黄酮类产生有关的基因,使丝胶中含有特殊的功能性活性物质。为丝胶的保健食用和高档化妆品利用提供原料。李军 费建明 李玉峰 Hosseiny Moghadam S.H 金卫明 徐孟奎 陈玉银 2006蚕桑通报2006,37,3:12
6Comparison of Hybrid and Sequential Therapies for H elicobacter pylori Eradication in I ran: A Prospective Randomized Trial显示文摘Hossein Sardarian Hafez Fakheri Vahid Hosseini Tarang Taghvaei Iradj Maleki Marjan Mokhtare 2012Helicobacter2012,,2:11
7Frequent loss of heterozygosity at 8p22 chromosomal region in diffuse type of gastric cancer显示文摘AIM: To study the loss of heterozygosity (LOH) at 8p21-23 locus in diffuse gastric cancer.METHODS: To evaluate the involvement of this region in gastric cancer, we used eight microsatellite markers covering two Mb of mentioned region, to perform a high-resolution analysis of allele loss in 42 cases of late diffuse gastric adenocarcinoma.RESULTS: Six of these STS makers: D8S1149, D8S1645, D8S1643, D8S1508, D8S1591, and D8S1145 showed 36%, 28%, 37%, 41%, 44% and 53% LOH, respectively.CONCLUSION: A critical region of loss, close to the NAT2 locus and relatively far from FEZ1 gene currently postulated as tumor suppressor gene in this region.Hedayat Allah Hosseini Ali Ahani Hamid Galehdari Ali Mohammad Froughmand Masoud Hosseini Abdolrahim Masjedizadeh Mohammad Reza Zali 2007World Journal of Gastroenterology2007,13,24:9
8糖尿病患者血清胱抑素C和急性反应指标与视网膜病变严重程度相关性研究(英文)显示文摘目的:评估糖尿病视网膜病变(DR)严重程度与血清胱抑素C和急性时相反应指标的相关性,包括红细胞沉降率(ESR)和超敏C反应蛋白(hs-CRP)。方法:研究纳入了1mo内就诊的所有糖尿病视网膜病患者。患者均记录人口统计学数据。行眼科检查,同时检测糖化血红蛋白(Hb A1c)、ESR、hs-CRP和血清胱抑素C水平。结果:研究包括67例糖尿病患者,其中19例(28.3%)无视网膜病变患者,22例(32.8%)非增殖型视网膜病变患者和26例(38.8%)增殖型视网膜病变患者。三组间平均年龄、性别分布、平均糖尿病病程、高血压和血脂异常患病率、吸烟状况以及Hb A1c水平无明显差异。随着视网膜病变发展,平均血清胱抑素C水平显著提高,三组分别为1.1±0.48,1.22±0.38,1.71±0.92(P=0.007)。在多元回归分析中,仅血清胱抑素C与糖尿病视网膜病变严重程度有关(P=0.025)。结论:研究表明,在独立于急性时相反应指标,血清胱抑素C水平随DR加重升高。因此,该结论可作为初级医护人员区分高危患者的标志。Joobin Khadamy Gholamhossein Yaghoobi Abbas Hosseini Rad Mahnaz Najafi Saeed Reza Heydari Pardis Khademi 2018国际眼科杂志2018,18,3:8
9Assessment of the anterior chamber parameters after laser iridotomy in primary angle close suspect using Pentacam and gonioscopy显示文摘AIM:To evaluate the changes in the anterior segment parameters of the subjects with primary angle closure suspect(PACS) before and after laser iridotomy(LI) using the Pentacam and gonioscopy. METHODS:Forty-eight eyes of 48 PACS were included.Anterior chamber angle(ACA),central anterior chamber depth(ACD),anterior chamber volume(ACV) and central corneal thickness(CCT) were recorded from the Pentacam before and one month after LI.ACA was graded according to Shaffer classification using Goldmann gonioscopy.RESULTS:ACA increased significantly from 25.59±4.41 to 26.46±4.33 degrees(P=0.009) and ACV changed from 85.97±16.07mm3to 99.25±15.83mm3(P=0.000).The changes in ACD,CCT and intraocular pressure were non-significant(P>0.05).Gonioscopy showed significant widening of the Shaffer angle in 4 quadrants(P<0.001).CONCLUSION:Pentacam can serve as the objective instrument in assessing the efficacy of LI.Alireza Esmaeili Behzad Barazandeh Sina Ahmadi Alireza Haghi Seyed Mahdi Ahmadi Hosseini Fereshteh Abolbashari 2013International Journal of Ophthalmology(English edition)2013,6,5:8
10LaZn_xFe_(1-x)O_3钙钛矿型纳米催化剂的制备、表征及其甲苯燃烧性能(英文)显示文摘Nanostructured LaFeO3 and substituted LaZnxFe1-xO3(x = 0.01,0.05,0.1,0.2,and 0.3) perovskites were synthesized by the sol-gel auto-combustion method and used in the catalytic combustion of toluene.Their structures and surface properties were investigated by X-ray diffraction,Fourier transmission infrared spectroscopy,BET surface area,and scanning electron microscopy.Characterization data revealed that the total insertion of zinc into LaFeO3 takes place when x ≤ 0.1.However,ZnO segregation occurs to some extent,especially at x > 0.1.The performance of these perovskites was evaluated by toluene combustion.The catalytic activity of the catalysts increased substantially with an increase in zinc substitution.These results can be attributed to the cooperative effect between LaZnxFe1-xO3 and the zinc oxide phases.The relative concentration of these phases determines their oxygen activation ability and reactivity.Seyed Ali HOSSEINI Mohammad Taghi SADEGHI Abdolali ALEMI Aligholi NIAEI Dariush SALARI Leila KAFI-AHMADI 2010催化学报2010,31,7:7
1112 hours after cerebral ischemia is the optimal time for bone marrow mesenchymal stem cell transplantation显示文摘Cell therapy using stem cell transplantation against cerebral ischemia has been reported. However, it remains controversial regarding the optimal time for cell transplantation and the transplantation route. Rat models of cerebral ischemia were established by occlusion of the middle cerebral artery. At 1, 12 hours, 1, 3, 5 and 7 days after cerebral ischemia, bone marrow mesenchymal stem cells were injected via the tail vein. At 28 days after cerebral ischemia, rat neurological function was evaluated using a 6-point grading scale and the pathological change of ischemic cerebral tissue was observed by hematoxylin-eosin staining. Under the fluorescence microscope, the migration of bone marrow mesenchymal stem cells was examined by PKH labeling. Caspase-3 activity was measured using spectrophotometry. The optimal neurological function recovery, lowest degree of ischemic cerebral damage, greatest number of bone marrow mesenchymal stem cells migrating to peri-ischemic area, and lowest caspase-3 activity in the ischemic cerebral tissue were observed in rats that underwent bone marrow mesenchymal stem cell transplantation at 12 hours after cerebral ischemia. These findings suggest that 12 hours after cerebral ischemia is the optimal time for tail vein injection of bone marrow mesenchymal stem cell transplantation against cerebral ischemia, and the strongest neuroprotective effect of this cell therapy appears at this time.Seyed Mojtaba Hosseini Mohammad Farahmandnia Zahra Razi Somayeh Delavarifar Benafsheh Shakibajahromi 2015Neural Regeneration Research2015,10,6:7
1225-gauge transconjunctival diagnostic vitrectomy in suspected cases of intraocular lymphoma: a case series and review of the literature显示文摘AIM:To report the cytology results of 25-gauge transconjunctival(25G-TSV)diagnostic vitrectomy in cases suspicious for intraocular lymphoma(IOL),and compare the results to those reported in the literature.METHODS:Clinical and cytopathological records of 18vitreous biopsy specimens obtained via 25G-TSV diagnostic vitrectomy in 12 patients suspicious for IOL were reviewed retrospectively.A review of the literature in regards to the diagnostic yields of vitreous specimens obtained via 25-gauge and 20-gauge diagnostic vitrectomy in suspected cases of IOL was performed.RESULTS:Eighteen eyes from 12 patients with clinical suspicion of IOL underwent diagnostic 25G-TSV.The cytopathological investigations demonstrated IOL in 15eyes(83.3%).Vitreous analysis was non-diagnostic in 3eyes(16.7%).CONCLUSION:Twenty-five-gauge diagnostic vitrectomy yields adequate sample for cytological evaluation of the vitreous in cases suspicious for IOL.The diagnostic results of the 25G-TSV in the current study are superior to those reported for 20-gauge vitrectomy but equivalent to those reported for 25G-TSV in the published literature.Mozhgan Rezaei Kanavi Masoud Soheilian Sayed Bagher Hosseini Amir A. Azari 2014International Journal of Ophthalmology(English edition)2014,7,3:7
13Polymorphism in the interleukin-17A promoter contributes to gastric cancer显示文摘AIM:To evaluate the contribution of the G-197A polymorphism in the interleukin-17(IL-17)promoter region to gastric cancer risk in an Iranian population.METHODS:We performed a case control study using samples from 161 individuals with gastric cancer and171 healthy controls.For each individual,the G-197A genotype was determined by restriction fragment length polymorphism analysis of polymerase chain reaction-amplified fragments.Statistical analyses were performed to determine whether any demographic or behavioral factors,infection with Helicobacter pylori(H.pylori),or a particular G-197A genotype was associated with gastric cancer risk.RESULTS:We found that the G-197A genotype wassignificantly associated with increased gastric cancer risk(P=0.001).Patients who were homozygous(AA)at position-197 were 2.9 times more likely to develop disease(95%CI:1.56-5.4;P=0.001).Furthermore,logistic regression analysis revealed that the presence of a single A allele increased the risk of gastric cancer up to 1.7-fold(95%CI:1.26-2.369;P=0.001).This association was observed for early stage gastric adenocarcinomas only,and was not linked to H.pylori infection.CONCLUSION:These results suggest that carrying one or more G-197A polymorphisms at position-197 in the IL-17 promoter region significantly increases gastric cancer risk in this patient population.Alireza Rafiei Vahid Hosseini Ghasem Janbabai Abuzar Ghorbani Abulghasem Ajami Touraj Farzmandfar Maedeh Darzyani Azizi Jeremy J Gilbreath D Scott Merrell 2013World Journal of Gastroenterology2013,19,34:7
14Effect of different seed treatments on dormancy breaking and germination in three species in arid and semi-arid lands显示文摘Seeds of many woody plant species have one of several types of dormancy. They do not germinate unless specific environmental signals are in place or events occur. This study was conducted to evaluate the effects of scarification treatments on seed dormancy and germination of Acacia nilotica (L.) Willd. ex Del., Prosopis juliflora (Sw.) DC. and Dodonaea viscosa (L.) Jacq. The following treatments were applied: T1, untreated seed (control); T2, sulphuric acid (97%) for 45 min; T3, boiling water for 5 min. The seeds were cultured on a Murashige and Skoog (MS) medium after sterilization. The responses of seeds to treatments were compared with each other and with the control treatment. Germination was observed daily for a 30-day period. Results indicated positive responses to treatments, while impermeable seed coats may be responsible for low germination rates in intact seeds as seen experimentally in the untreated control. The highest germination was obtained for P. juliflora and D. viscosa acid-scarified seeds (80.8%-90.8%) and for scarified seeds of A. nilotica (50.2%) boiled in water. The germination indices, i.e., final germination percentage (FG), mean daily germination (MDG) and germination rate (GR), were significantly affected by treatments and species (p<0.01).Seyed Mohammad Hosseini NASR Sekineh Kiani SAVADKOOHI Elahe AHMADI 2013Forestry Studies in China2013,15,2:7
15Simultaneous determination of cysteamine and folic acid in pharmaceutical and biological samples using modified multiwall carbon nanotube paste electrode显示文摘一个碳浆糊电极(用户终端设备) 化学上与 multiwall 碳 nanotubes 修改了, ferrocene (FC ) 为 cysteamine (CA ) 和 folic 酸(FA ) 的踪迹数量的同时的决心被用作一个选择电气化学的传感器。这个修改电极为 CA 的阳极的氧化显示出很有效的 electrocatalytic 活动。CA 和 FA 的微分脉搏 voltammograms 的山峰水流在 0.7200 mol/L CA 和 5.0700 mol/L FA 的范围与他们的集中线性地增加了。为 CA 和 FA 的察觉限制分别地是 0.3 mol/L 和 2.0 mol/L。散开系数(D) 和转移系数() CA 也被决定。这些条件是足够的个别地并且同时允许 CA 和 FA 的决心。Ali Taherkhani Hassan Karimi-Maleh Ali A.Ensafi Hadi Beitollahi Ahmad Hosseini Mohammad A.Khalilzadeh Hassan Bagheri 2012Chinese Chemical Letters2012,23,2:6
16基于多阶人工神经网络的ECG信号诊断模型研究显示文摘目前已经有多种不同的ECG(心电图)信号辅助诊断工具得到应用,其中包含了基于人工神经网络的ECG分类器应用系统。本文介绍一种基于多阶前馈人工神经网络的新型ECG信号诊断模型,其目标是设计一种结构简单、成本低、响应速度快,识别率高的ECG信号辅助诊断系统。首先给出多个不同结构的神经网络,然后针对6种不同的心脏状况,比较这些神经网络之间的性能差异和辨别能力。网络的输入数据来自于M IT/B IH数据库,包括12种ECG特征信号和相应的每次心脏搏动的13段压缩信号。通过研究测试发现,基于二阶神经网络的ECG模型识别率最高,正确率达到了90.57%。骆德汉 许广桂 邹宇华 H.Gholam Hosseini 2008仪器仪表学报2008,29,1:6
17Wettability alteration and oil recovery by spontaneous imbibition of smart water and surfactants into carbonates显示文摘Naturally fractured carbonate reservoirs have very low oil recovery efficiency owing to their wettability and tightness of matrix.However,smart water can enhance oil recovery by changing the wettability of the carbonate rock surface from oilwet to water-wet,and the addition of surfactants can also change surface wettability.In the present study,the effects of a solution of modified seawater with some surfactants,namely C12 TAB,SDS,and TritonX-100(TX-100),on the wettability of carbonate rock were investigated through contact angle measurements.Oil recovery was studied using spontaneous imbibition tests at 25,70,and 90°C,followed by thermal gravity analysis to measure the amount of adsorbed material on the carbonate surface.The results indicated that Ca2+,Mg2+,and SO42-.ions may alter the carbonate rock wettability from oil-wet to water-wet,with further water wettability obtained at higher concentrations of the ions in modified seawater.Removal of NaCl from the imbibing fluid resulted in a reduced contact angle and significantly enhanced oil recovery.Low oil recoveries were obtained with modified seawater at 25 and 70°C,but once the temperature was increased to 90°C,the oil recovery in the spontaneous imbibition experiment increased dramatically.Application of smart water with C12 TAB surfactant at 0.1 wt%changed the contact angle from 161°to 52°and enhanced oil recovery to 72%,while the presence of the anionic surfactant SDS at 0.1 wt%in the smart water increased oil recovery to 64.5%.The TGA analysis results indicated that the adsorbed materials on the carbonate surface were minimal for the solution containing seawater with C12 TAB at 0.1 wt%(SW+CTAB(0.1 wt%)).Based on the experimental results,a mechanism was proposed for wettability alteration of carbonate rocks using smart water with SDS and C12 TAB surfactants.Saeb Ahmadi Mostafa Hosseini Ebrahim Tangestani Seyyed Ebrahim Mousavi Mohammad Niazi 2020Petroleum Science2020,17,3:6
18Effects of uprooting tree on herbaceous species diversity, woody species regeneration status and soil physical characteristics in a temperate mixed forest of Iran显示文摘We conducted a study to examine the pattern of development of herbaceous plant species, woody species regeneration and soil physical characteristics after tree uprooting in 20-ha areas of Experimental Forest Station of Tarbiat Modares University located in a temperate forest of Mazandaran province in the north of Iran. Soil bulk density, soil texture and moisture from pit and mound (PM) were measured in the laboratory. Results show that the soil bulk density was most in soil deeper layers at mound top, and the soil moisture content was most in soil deeper layers at Pit bottom. Our study supports that the micro-topography of PM (pit and mound) topography will create a mosaic of environmental conditions. This environmental heterogeneity could be responsible for the diversity of herbaceous plant species and regeneration of woody species. It is recommend that the fallen trees with PM structure should remain in the protected area without clearing as the best option for forest restoration. This information can be useful for forest management that attempts to emulate natural processes.Y. Kooch S. M. Hosseini J. Mohammadi S. M. Hojjati 2012Journal of Forestry Research2012,23,1:6
19照耀在历史深处的人性光辉——A Thousand Splendid Suns显示文摘《灿烂千阳》虽出自胡赛尼这位阿富汗裔男性作家之手,但书中却用极其细腻的笔触,描写了两个普通的阿富汗女性:玛丽雅姆(Mariam)和莱拉(Laila)。小说开篇于玛丽雅姆。Khaled Hosseini 陈榕 2008新东方英语(中英文版)2008,0,9:6
20牙龈乳头指数在种植支持式单冠修复后美学评价中的可信度和有效性研究显示文摘目的探讨上颌中切牙进行种植支持式单冠修复后,采用牙龈乳头指数对种植牙周进行美学评价的可信度与有效性。方法纳入上颌中切牙种植支持式单冠修复后的患者25例。由两名观察者分别对每例患者的3个牙龈乳头位点进行牙龈乳头指数评分(PIS),计算两观察者的观察者自身前后对照一致性百分比和Cohen'sκ值,及观察者间对照一致性百分比和Cohen'sκ值,验证PIS指数应用的可信度。此外,在图片上测得每个位点的牙龈乳头实际长度(ST),得出该位点的牙龈乳头丰满度(PP)。用Spearman相关系数检验PIS与PP的相关性,验证PIS指数在种植支持式单冠修复后牙周组织美学效果评价中的有效性。结果两名观察者在三位点总计的可重复性均超过70%,Cohen'sκ值均达到了'较好'的程度。κ值显示三位点总计的观察者间对照一致性均达到'中等'水平。统计显示PIS指数与牙龈乳头丰满度(PP)有显著相关性(rs=0.567,P=0.000)。结论 PIS这一指数的可行性、可信度和有效性较高,可作为单牙种植修复后牙周软组织美学效果评价中的重要评价指标。任迅 彭敏 Mandana Hosseini Klaus Gotfredsen 2015四川医学2015,36,8:6
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