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89篇 您的检索式:作者名="KEYVAN"
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1Potato Responds to Salt Stress by Increased Activity of Antioxidant Enzymes显示文摘To understand the response of potato to salt stress, antioxidant enzyme activities and ion content were analyzed for a sensitive and a tolerant cultivar. Nodal cuttings of the tolerant cultivar, Kennebec, and the sensitive cultivar, Concord, were exposed to media without or with 30, 60, 90 or 120 mmol/L NaCl for 4 weeks. On exposure to NaCl, the length and fresh and dry weight of both shoots and roots of Concord showed greater decrease than those of Kennebec. The decrease in shoot growth was more severe than that of the root for both cultivars. The K+ content of shoots and roots of both cultivars was reduced in a dose-dependent manner by exposure to NaCl; the Na+ content increased. Activities of ascorbate peroxidase, catalase and glutathione reductase were increased in NaCl-exposed shoots of Kennebec; the corresponding activities in NaCl-exposed shoots of Concord were decreased. Roots of both cultivars showed similar changes in the activities of these enzymes on exposure to NaCl. These studies established that enzyme activities in Concord shoots are inversely related to the NaCl concentration, whereas those in Kennebec do not show a dose dependency, which is also the case for the roots of both cultivars. Our findings suggest that an increase in activity of antioxidant enzymes, such as ascorbate peroxidase, catalase and glutathione reductase, can contribute to salt tolerance in Kennebec, a salt resistant cultivar of potato.Keyvan Aghaei Ali Akber Ehsanpour Setsuko Komatsu 2009Journal of Integrative Plant Biology2009,51,12:10
2Functional recovery of sciatic nerve through inside-out vein graft in rats显示文摘客观现在的学习瞄准了进一步全面功能,对用老鼠的外部神经新生的 histomorphometrical 和 immunohistochemical 评价臀部的神经横断模型。方法 10 公里老鼠臀部的神经差距在老鼠被创造。在控制组神经树桩是到邻近的肌肉的 sutured,在治疗组,差距被衔接用一在内外面静脉接枝。在假冒操作组,神经被操作并且留给未经触动。所有动物经历了在外科以后走轨道分析测试 4, 8,和 12 星期。随后,肌肉团测量被执行估计虚弱,词法上观察臀部的神经新生的组织学的考试和用反 S-100 检测 Schwann 房间的 Immunohistochemistry。结果与二个在题目之间因素用因素的 ANOVA 被分析。为 pairwise 比较的 Bonferroni 测试被用来检验处理的效果。myelinated 神经纤维的功能的分析显示出的结果那神经功能在处理在时间功课显著地改善了组。然而, myelinated 神经纤维的量的 morphometrical 分析证明在处理组的 8 和 12 个星期之间没有重要差别。肌肉重量比率更大, gastrocnemius 肌肉的重量损失被改善由在内外面静脉 grafting。积极 immunohistochemical 反应的位置进一步暗示那改革了轴突,在静脉 grafting 被执行以后, Schwann 像房间的细胞存在,并且被 myelination 的过程和改革神经的结构的恢复伴随。外部神经修理的结论功能的分析比量的 morphometricalRahim Mohammadi Saeed Azizi Nowruz Delirezh Rahim Hobbenaghi Keyvan Amini 2011Chinese Journal of Traumatology2011,14,1:5
3Frequency,types,and treatment of anemia in Turkish patients with inflammatory bowel disease显示文摘AIM to specify the type and prevalence of anemia along with a treatment approach for inflammatory bowel disease(IBD).METHODS We conducted a retrospective study on 465 patients who were diagnosed with IBD and followed up at our hospital from June 2015 to June 2016 [male: 254, female: 211; average age: 47 ± 14.4; Crohn's disease(CD): 257, Ulcerative Colitis(UC): 208]. Epidemiological and clinical data, such as sex, age, age of diagnosis, type of IBD, disease extension, disease behavior and duration, treatments for IBD and anemia, and surgical history were obtained for each patient. Per World Health Organization guidelines, anemia was diagnosed for males if hemoglobin values were less than 13 g/dL and for females if hemoglobin values were less than 12 g/d L.RESULTS We determined that 51.6% of the patients had anemia, which was more frequent in women then men(64% vs 41.3%, P < 0.001). Anemia frequency was higher in CD cases(57.6%) than in UC cases(44.2%)(P = 0.004). CD involvements were as follows: 48.2% in ileal involvement, 19% in colonic involvement, and 32.8% in ileocolonic involvement. Furthermore, 27.5% of UC patients had proctitis(E1) involvement, 41% ofthem had involvement in left colitis(E2), and 31.5% had pancolitis involvement. There was no significant relationship between anemia frequency and duration of disease(P = 0.55). Iron deficiency anemia(IDA) was the most common type of anemia in this cohort. Moreover, because anemia parameters have not been evaluated during follow-up of 15.3% of patients, the etiology of anemia has not been clarified. Fifty percent of patients with anemia received treatment. Twentythree percent of IDA patients had oral iron intake and forty-one percent of IDA patients had parenteral iron treatment. Fifty-three percent of patients who were suffering from megaloblastic anemia received B12/folic acid treatment.CONCLUSION We found out that almost half of all IBD patients(51.6%) had anemia, the most frequent of which was IDA. Almost half of these patients received treatment. We should increase the treatment rate in our IBD patients that have anemia.Goksel Bengi Hatice Keyvan Seda Bayrak Durmaz Hale Akpinar 2018World Journal of Gastroenterology2018,24,36:4
4A Stable Analytical Solution Method for Car-Like Robot Trajectory Tracking and Optimization显示文摘In this paper, the car-like robot kinematic model trajectory tracking and control problem is revisited by exploring an optimal analytical solution which guarantees the global exponential stability of the tracking error. The problem is formulated in the form of tracking error optimization in which the quadratic errors of the position, velocity, and acceleration are minimized subject to the rear-wheel car-like robot kinematic model. The input-output linearization technique is employed to transform the nonlinear problem into a linear formulation. By using the variational approach, the analytical solution is obtained, which is guaranteed to be globally exponentially stable and is also appropriate for real-time applications. The simulation results demonstrate the validity of the proposed mechanism in generating an optimal trajectory and control inputs by evaluating the proposed method in an eight-shape tracking scenario.Keyvan Majd Mohammad Razeghi-Jahromi Abdollah Homaifar 2020IEEE/CAA Journal of Automatica Sinica2020,7,1:3
5Effect of local administration of cyclosporine A on pe- ripheral nerve regeneration in a rat sciatic nerve transec- tion model显示文摘ObjectiveTo 估计在在老鼠 model.MethodsA 衔接臀部的神经缺点上在 chitosan 水管装载的 cyclosporine A (CsA ) 的效果 10  公里臀部的神经缺点用充满 10   的一根 chitosan 水管被衔接; l 搬运人药冲淡(10   g/L CsA ) 。在控制组,水管独自充满搬运人冲淡的一样的卷。改革纤维被学习 4, 8 和 12  在功能的学习更快证实了的 surgery.ResultsThe 以后的星期在处理组的改革轴突的恢复比控制组(P  <  0.05 ) 。有在处理和控制组之间的 gastrocnemius 肌肉重量比率的统计上重要的差别(P  <  0.05 ) 。改革纤维的 Morphometric 索引证明在对待 CsA 的动物的 myelinated 纤维的数字和直径比在控制组的那些显著地高。在 immunohistochemistry,对在 CsA 组的 S-100 的反应的地点清楚地比控制更积极在一根 chitosan 水管装载的 group.ConclusionCsA 导致功能的恢复的改进和臀部的神经的量的 morphometric 索引。没有任何复杂并发症,它与它的全身的管理相比是容易可得到的。Rahim Mohammadi Hadi Heydarian Keyvan Amini 2014Chinese Journal of Traumatology2014,17,1:3
6Local effect of celecoxib on peripheral nerve repair com- bined with silicone tubulization in rat显示文摘ObjectiveTo 在一只老鼠在神经新生上估计 celecoxib 的本地效果臀部的神经横断 model.MethodsForty -- 五只男健康白 Wistar 老鼠随机被划分成三个试验性的组(为各个的 n=15 ) :假冒操作(假冒) ,控制(SIL ) 和对待的 celecoxib (SIL/CLX ) 组织。在在麻醉以后的假冒的组,左臀部的神经被暴露,在动态平衡以后,肌肉是 sutured。在 SIL 组,左臀部的神经以一样的方法和对离开 10   的 tibioperoneal 分叉近似的 transected 被暴露;公里差距。近似、远侧的树桩各被插入到一个硅酮试管并且用 10 µl 磷酸盐填满缓冲答案。在 SIL/CLX,组缺点用充满 .ResultsFunctional 学习和 gastrocnemius 肌肉质量证实了的 10 µl celecoxib (0.1 g/L ) 的一个硅酮试管被衔接在 SIL/CLX 的改革轴突的更快、更好的恢复比在 SIL 组(P < 0.05 ) 。改革纤维的 Morphometric 索引证明在 SIL/CLX 的 myelinated 纤维的数字和直径比在控制组的那些显著地大。在 immunohistochemistry,对在 SIL/CLX 的 S-100 的反应的地点在 SIL 清楚地是比那更积极的到 celecoxib 的本地处理的 group.ConclusionResponse 证明它影响并且改善外部神经新生的功能的恢复。Rahim Mohammadi Keyvan Amini Alireza Yousefi Mehdi Abdollahi-Pirbazari 2013Chinese Journal of Traumatology2013,16,5:2
7TiO_(2)纳米颗粒对7075铝合金表面等离子体电解氧化涂层性能的影响显示文摘采用等离子体电解氧化(PEO)技术,利用单极脉冲波形在含有胶体TiO_(2)纳米颗粒的溶胶电解液中制备Al_(2)O_(3)−TiO_(2)复合涂层。溶胶溶液是将1、3和5 g/L的草酸钛酸钾(PTO)溶解在硅酸盐溶液中制得。利用扫描电镜、能量色散光谱、X射线衍射和拉曼光谱对涂层进行表征。采用极化和阻抗技术研究涂层的腐蚀行为。结果表明,TiO_(2)通过微放电方式进入涂层,并掺杂到氧化铝相中。TiO_(2)掺入量较高时,表面微孔减少;反之,掺入量较低时则微孔增多。TiO_(2)含量越高,涂层的外层越致密,内层越厚。电化学测试结果表明,与在不含PTO溶液中制备的涂层相比,在含3 g/L PTO溶液中制备的涂层腐蚀性能得到大幅提高。在不含PTO溶液中制备的涂层含有γ-Al_(2)O_(3),δ-Al_(2)O_(3)和非晶相,而PTO的存在促进α-Al_(2)O_(3)的生成。Mehri HASHEMZADEH Keyvan RAEISSI Fakhreddin ASHRAFIZADEH Amin HAKIMIZAD Monica SANTAMARIA 2021Transactions of Nonferrous Metals Society of China2021,31,12:2
8A Kernel Function Based Interior-Point Methods for Solving P_*(κ)-Linear Complementarity Problem显示文摘In this paper, motivated by the complexity results of Interior Point Methods (IPMs) forLinear Optimization (LO) based on kernel functions, we present a polynomial time IPM for solvingP_*(κ)-linear complementarity problem, using a new class of kernel functions. The special case of ournew class was considered earlier for LO by Y. Q. Bai et al. in 2004. Using some appealing propertiesof the new class, we show that the iteration bound for IPMs matches the so far best known theoreticaliteration bound for both large and small updates by choosing special values for the parameters of thenew class.M.Reza PEYGHAMI Keyvan AMINI 2010Acta Mathematica Sinica,English Series2010,26,9:2
9Chemical composition and antioxidative activity of Moldavian balm ( Dracocephalum moldavica L.) extracts显示文摘Keyvan Dastmalchi H.J. Damien Dorman Into Laakso Raimo Hiltunen 2006LWT - Food Science and Technology2006,,9:2
10Angiopoietin-1 inhibits endothelial cell apoptosis via Akt/Survivin pathway 显示文摘Andreas P David F Keyvan M 2000Biol Chem2000,275,13:2
11Human parvovirus B19 causes cell cycle arrest of human erythroid progenitors via deregulation of the E2F family of transcription factors显示文摘Wan Zhihong Zhi Ning Wong Susan Keyvanfar Keyvan Liu Delong Raghavachari Nalini Munson Peter J Su Su Malide Daniela Kajigaya Sachiko Young Neal S 2010Journal of Clinical Investigation2010,,10:2
12An application of multivariate simulation in the cement industry显示文摘Denis M Keyvan M Claude B 2005Mathematical Geology2005,37,5:1
13Retrospective analysis of survival rates and marginal bone loss on short implants in the mandible显示文摘Florian G. Draenert Keyvan Sagheb Katharina Baumgardt Peer W. K?mmerer 2011Clin. Oral Impl. Res2011,,9:1
14Boundary analysis and geometric completion for recognition of interacting machining features显示文摘Keyvan R Behrooz A 2006Computer Aided Design2006,38,8:1
15Role of angiopoietin-2 in regulating growth and vascularity of astrocytomas显示文摘Gelareh Z Keyvan K Qian B 2010J Onco12010,2,1:1
16Effects of depression and anxiety symptoms on cardiac mortality following myocardial infarction: A 2-year follow-up显示文摘Seyed Hamzeh Hosseini Keyvan Yousefnejad Sasan Tabiban Vida Nesarhoseyni Babak Bagheri Asadolah Mohseni Kiasari Ali Ghaemian Seyed Naser Ghadirnejad Hamideh Azimi Lolati Fatemeh Nasiri Amiri Haleh Ashraf Vahid Mokhberi 2011International Journal of Psychiatry in Clinical Practice2011,,2:1
17Electrophoretic deposition of nanostructured hydroxyapatite coating on AZ91 magnesium alloy implants with different surface treatments显示文摘Ramin Ptojaee Mohammadhossein Fathi Keyvan Raeissi 2013Applied Surface Science2013,285,15:1
18Pattern scanning m low sidelobe phased array antennas using pattern search algorithms显示文摘Siamak Ebadi Keyvan Forooraghi 2007Proceding of The 4th European Radar Conference2007,55,3:1
19Electrophoretic deposition of nanostructured hydroxyapatite coating on AZ91 magnesium alloy implants with different surface treatments显示文摘RAMIN ROJAEE MOHAMMADHOSSEIN FATHI KEYVAN RAEISSI 2013Applied Surface Science2013,,285:1
20The effect of thalidomide on ethanol-induced gastric mucosal damage in mice: Involvement of inflammatory cytokines and nitric oxide显示文摘Keyvan Amirshahrokhi Ali-Reza Khalili 2015Chemico-Biological Interactions2015,,:1
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