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| 1 | Evaluation of extracts and essential oil from Callistemon viminalis leaves:Antibacterial and antioxidant activities,total phenolic and flavonoid contents显示文摘Objective:To investigate antioxidant and antibacterial activities of Callistemon viminalis(C.viminalis)leaves.Methods:The essential oil of C.viminalis leaves obtained by hydrodistillation was analyzed by GC/MS.Different extracts were tested for total phenolic and flavonoid contents and in vitro antioxidant(DPPH assay)and antibacterial(agar disc diffusion and 96-well micro-plates methods)actives.Results:Fourteen components were identified in the essential oil,representing 98.94%of the total oil.The major components were 1,8-cineole(64.53%)andα-pinene(9.69%).Leaf essential oil exhibited the highest antioxidant activity of(88.60±1.51)%comparable to gallic acid,a standard compound[(80.00±2.12)%].Additionally,the biggest zone of inhibitions against the studied bacterial strains was observed by the essential oil when compared to the standard antibiotic(tetracycline).The crude methanol extract and ethyl acetate fraction had a significant antibacterial activity against the tested bacterial strains.Conclusions:It can be suggested that C.viminalis is a great potential source of antibacterial and antioxidant compounds useful for new antimicrobial drugs from the natural basis.The present study revealed that the essential oil as well as the methanol extracts and ethyl acetate fraction of C.viminalis leaves exhibited highly significant antibacterial activity against the tested bacterial strains. | Mohamed ZM Salem Hayssam M Ali Nader A El-Shanhorey Ahmed Abdel-Megeed | 2013 | Asian Pacific Journal of Tropical Medicine2013，6，10： | 14 |
| 2 | Preemptive mechanical ventilation can block progressive acute lung injury显示文摘Mortality from acute respiratory distress syndrome(ARDS) remains unacceptable, approaching 45% in certain high-risk patient populations. Treating fulminant ARDS is currently relegated to supportive care measures only. Thus, the best treatment for ARDS may lie with preventing this syndrome from ever occurring. Clinical studies were examined to determine why ARDS has remained resistant to treatment over the past several decades. In addition, both basic science and clinical studies were examined to determine the impact that early, protective mechanical ventilation may have on preventing the development of ARDS in at-risk patients. Fulminant ARDS is highly resistant to both pharmacologic treatment and methods of mechanical ventilation. However, ARDS is a progressive disease with an early treatment window that can be exploited. In particular, protective mechanical ventilation initiated before the onset of lung injury can prevent the progression to ARDS. Airway pressure release ventilation(APRV) is a novel mechanical ventilation strategy for delivering a protective breath that has been shown to block progressive acute lung injury(ALI) and prevent ALI from progressing to ARDS. ARDS mortality currently remains as high as 45% in some studies. As ARDS is a progressive disease, the key to treatment lies with preventing the disease from ever occurring while it remains subclinical. Early protective mechanical ventilation with APRV appears to offer substantial benefit in this regard and may be the prophylactic treatment of choice for preventing ARDS. | Benjamin Sadowitz Sumeet Jain Michaela Kollisch-Singule Joshua Satalin Penny Andrews Nader Habashi Louis A Gatto Gary Nieman | 2016 | World Journal of Critical Care Medicine2016，5，1： | 9 |
| 3 | Visible light optical coherence tomography measures retinal oxygen metabolic response to systemic oxygenation显示文摘The lack of capability to quantify oxygen metabolism noninvasively impedes both fundamental investigation and clinical diagnosis of a wide spectrum of diseases including all the major blinding diseases such as age-related macular degeneration,diabetic retinopathy,and glaucoma.Using visible light optical coherence tomography(vis-OCT),we demonstrated accurate and robust measurement of retinal oxygen metabolic rate(rMRO2)noninvasively in rat eyes.We continuously monitored the regulatory response of oxygen consumption to a progressive hypoxic challenge.We found that both oxygen delivery,and rMRO2 increased from the highly regulated retinal circulation(RC)under hypoxia,by 0.2860.08 μL min(^-1)(p,0.001),and 0.2060.04 μL min(^-1)(p,0.001)per 100 mmHg systemic pO2 reduction,respectively.The increased oxygen extraction compensated for the deficient oxygen supply from the poorly regulated choroidal circulation.Results from an oxygen diffusion model based on previous oxygen electrode measurements corroborated our in vivo observations.We believe that vis-OCT has the potential to reveal the fundamental role of oxygen metabolism in various retinal diseases. | Ji Yi Wenzhong Liu Siyu Chen Vadim Backman Nader Sheibani Christine M.Sorenson Amani A.Fawzi Robert A.Linsenmeier Hao F.Zhang | 2015 | Light(Science & Applications)2015，4，1： | 8 |
| 4 | 微空心阴极放电机理及其在电热式推力器中的应用显示文摘近年来,微空心阴极放电(MHCD)技术的发展为研制适用于小卫星的先进新型微推力器提供了可能。MHCD是微放电领域中一种新颖的非平衡高气压辉光放电,其优点是可以在高气压下稳定放电,并且只需要非常低的电压(几百伏特)或者输入功率(百毫瓦数量级)。本文针对MHCD,实验研究了微放电的电流-电压特性,并利用光学发射光谱的方法测量了微等离子体中电子数密度和中性气体温度。结果表明,在稳定的辉光放电下,MHCD孔内的电子数密度和中性气体温度随着压强和放电电流的增加而增大,电子数密度可达1014cm-3,中性气体温度可达1000K。由此可以推断,微空心阴极放电较小的尺寸结构与强烈并可控的气体加热相结合,完全可以开发应用在新型的电热式等离子体推进上,研制成微空心阴极放电等离子体推力器。由于在微放电等离子体中加热了工质气体,因此其性能可大大高于冷气推进。 | 夏广庆 毛根旺 Nader Sadeghi | 2008 | 宇航学报2008，29，5： | 6 |
| 5 | Experimental evaluation of mechanically stabilized earth walls with recycled crumb rubbers显示文摘Traditional techniques for treatment of waste rubber, such as burning, generate some highly nondegradable synthetic materials that cause unrepairable environmental damages by releasing heavy metals, such as arsenic, chromium, lead, manganese and nickel. For this, scrap tires are used as lightweight alternative materials in many engineering applications, such as retaining wall backfilling. In the present study, 90 laboratory models were prepared to evaluate the stability of mechanically stabilized earth(MSE) walls with plate anchors. Then, the bearing capacity and horizontal displacements of the retaining walls were monitored by exerting a static loading to investigate the effects of adding different contents(5 wt%, 10 wt%, 15 wt% and 20 wt%) of recycled crumb rubber(RCR) to the fill of a mechanically stabilized retaining wall with plate anchors. To visualize the critical slip surface of the wall, the particle image velocimetry(PIV) technique was employed. Results showed that the circular anchor plates almost continually provided a higher bearing capacity and wall stability than the square plates. Moreover, the backfill with 15 wt% RCR provided the maximum bearing capacity of the wall. Increasing the weight percentage of RCR to 20 wt% resulted in a significant reduction in horizontal displacement of the wall,which occurred due to the decrease in lateral earth pressure against the whole walls. An increase in RCR content resulted in the decrease in the formation of failure wedge and the expansion of the wall slip surface, and the failure wedge did not form in the sand mixtures with 15 wt% and 20 wt% RCRs. | Matin Jalali Moghadam Amirali Zad Nima Mehrannia Nader Dastaran | 2018 | Journal of Rock Mechanics and Geotechnical Engineering2018，10，5： | 6 |
| 6 | 无溶剂条件下N-磺酸琥珀酰亚胺催化乙酰化反应(英文)显示文摘A small amount of succinimide-N-sulfonic acid efficiently catalyzed the acetylation of a variety alcohols, phenols, thiols, amines and aldehydes with acetic anhydride at room temperature under solvent free conditions. This catalyst has the advantages of excellent yields and short reaction times and the reaction can be carried out on a large scale, which makes it potentially useful for industrial applications. | Farhad SHIRINI Nader Ghaffari KHALIGH | 2013 | 催化学报2013，34，4： | 6 |
| 7 | Clayey soil stabilization using alkali-activated volcanic ash and slag显示文摘Lime and Portland cement are the most widely used binders in soil stabilization projects.However,due to the high carbon emission in cement production,research on soil stabilization by the use of more environmentally-friendly binders with lower carbon footprint has attracted much attention in recent years.This research investigated the potential of using alkali-activated ground granulated blast furnace slag(GGBS)and volcanic ash(VA)as green binders in clayey soil stabilization projects,which has not been studied before.The effects of different combinations of VA with GGBS,various liquid/solid ratios,different curing conditions,and different curing periods(i.e.7 d,28 d and 90 d)were investigated.Compressive strength and durability of specimens against wet-dry and freeze-thaw cycles were then studied through the use of mechanical and microstructural tests.The results demonstrated that the coexistence of GGBS and VA in geopolymerization process was more effective due to the synergic formation of N-A-S-H and C-(A)-S-H gels.Moreover,although VA needs heat curing to become activated and develop strength,its partial replacement with GGBS made the binder suitable for application at ambient temperature and resulted in a remarkably superior resistance against wet-dry and freeze-thaw cycles.The carbon embodied of the mixtures was also evaluated,and the results confirmed the low carbon footprints of the alkali-activated mixtures.Finally,it was concluded that the alkali-activated GGBS/VA could be promisingly used in clayey soil stabilization projects instead of conventional binders. | Hania Miraki Nader Shariatmadari Pooria Ghadir Soheil Jahandari Zhong Tao Rafat Siddique | 2022 | Journal of Rock Mechanics and Geotechnical Engineering2022，14，2： | 5 |
| 8 | Diversity of Helicobacter pylori genotypes in Iranian patients with different gastroduodenal disorders显示文摘AIM:To investigate the diversity of Helicobacter pylori(H.pylori)genotypes and correlations with disease outcomes in an Iranian population with different gastroduodenal disorders.METHODS:Isolates of H.pylori from patients with different gastroduodenal disorders were analyzed after culture and identification by phenotypic and genotypic methods.Genomic DNA was extracted with the QIAamp DNA mini kit(Qiagen,Germany).After DNA extraction,genotyping was done for cagA,vacA(s and m regions),iceA(iceA1,iceA2)and babA with specific primers for each allele using polymerase chain reaction(PCR).All patients’pathologic and clinical data and their relation with known genotypes were analyzed by using SPSS version 19.0 software.2test and Fisher’s exact test were used to assess relationships between categorical variables.The level of statistical significance was set at P<0.05.RESULTS:A total of 71 isolates from 177 patients with different gastroduodenal disorders were obtained.Based on analysis of the cagA gene(positive or negative),vacA s-region(s1or s2),vacA m-region(m1or m2),iceA allelic type(iceA1and iceA2)and babA gene(positive or negative),twenty different genotypic combinations were recognized.The prevalence of cagA,vacA s1,vacA s2,vacA m1,vacA m2,iceA1,iceA2,iceA1+iceA2and babA were 62%,78.9%,19.7%,21.1%,78.9%,15.5%,22.5%,40.8%and 95.8%,respectively.Interestingly,evaluation of PCR results for cagA in 6 patients showed simultaneous existence of cagA variants according to their size diversities that proposed mixed infection in these patients.The most prevalent genotype in cagA-positive isolates was cagA+/vacAs1m2/iceA1+A2/babA+and in cagA-negative isolates was cagA-/vacAs1m2/iceA-/babA+.There were no relationships between the studied genes and histo-pathological findings(H.pylori density,neutrophil activity,lymphoid aggregation in lamina propria and glandular atrophy).The strains which carry cagA,vacAs1/m1,iceA2and babA genes showed significant associations with severe active chronic gastritis(P=0.011,0.025,0.020 and 0.031,respectively).The vacAs1genotype had significant correlation with the presence of the cagA gene(P=0.013).Also,babA genotype showed associations with cagA(P=0.024).In the combined genotypes,only cagA+/vacAs1m1/iceA2/babA+genotype showed correlation with severe active chronic gastritis(P=0.025).CONCLUSION:This genotyping panel can be a useful tool for detection of virulent H.pylori isolates and can provide valuable guidance for prediction of the clinical outcomes. | Farzam Vaziri Shahin Najar Peerayeh Masoud Alebouyeh Tabassom Mirzaei Yoshio Yamaoka Mahsa Molaei Nader Maghsoudi Mohammad Reza Zali | 2013 | World Journal of Gastroenterology2013，19，34： | 5 |
| 9 | 温和条件下丁二酰亚胺-N-磺酸催化合成双吲哚甲烷和香豆素衍生物(英文)显示文摘A mild and simple procedure is described for the synthesis of bis(indolyl)methane and coumarin derivatives using succinimide-N-sulfonic acid as an efficient,cheap,and reusable catalyst under mild conditions. | Farhad Shirini Nader Ghaffari Khaligh | 2013 | 催化学报2013，34，10： | 5 |
| 10 | Associations of chronic hepatitis C with metabolic and cardiac outcomes显示文摘 | Z. M. Younossi M. Stepanova F. Nader Z. Younossi E. Elsheikh | 2013 | Aliment Pharmacol Ther2013，，6： | 4 |
| 11 | Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes显示文摘Yttria-stabilized zirconia(YSZ) is the most common electrolyte material for solid oxide fuel cells. Herein, we conducted a comparative study on the densification behavior of three different kinds of commercial 8 mol% YSZ powders:(i) TZ-8Y(Tosoh, Japan),(ii) MELox 8Y(MEL Chemicals, UK), and(iii) YSZ-HT(Huatsing Power, China). The comparison was made on both the selfsupporting pellets and thin-film electrolytes coated onto a NiO–YSZ anode support. For the pellets, MELox 8Y showed the highest densification at lower sintering temperatures with 93% and 96% of the theoretical density at 1250 and 1300 ℃, respectively. Although YSZ-HT showed a higher sintering rate than TZ-8Y, a sintering temperature of 1350 ℃ was required for both the powders to reach 95% of the theoretical density. For the thin-film electrolytes, on the other hand, YSZ-HT showed the highest sintering rate with a dense microstructure at a co-sintering temperature of 1250 ℃. Our results indicate that besides the average particle size, other factors such as particle size distribution and post-processing play a significant role in determining the sintering rate and densification behavior of the YSZ powders. Additionally, a close match in the sintering shrinkage of the electrolyte and anode support is important for facilitating the densification of the thin-film electrolytes. | Dhruba PANTHI Nader HEDAYAT Yanhai DU | 2018 | Journal of Advanced Ceramics2018，7，4： | 4 |
| 12 | 上调血红素氧合酶1对糖尿病心肌梗死大鼠心功能的远期影响显示文摘目的:研究上调血红素氧合酶1(HO-1)的表达对糖尿病心肌梗死大鼠心功能的影响及其机制。方法:将60只成年Wistar雄性大鼠随机分为5组(n=12),分别为假手术组、糖尿病组、模型组、诱导剂组、抑制剂组。心梗造模后次日开始给药,1次/周,持续6周,术后28周,应用心脏超声、经颈动脉左心室内插管术等方法观察HO-1诱导剂钴原卟啉(CoPP)及HO活性抑制剂锡中卟啉(SnMP)干预后对心室重构及心功能各项指标的远期影响;测定血糖(GLU)、总胆红素(TB)、C反应蛋白(CRP)、血清肌酐(Cr)、转氨酶(ALT)等指标;采用ELISA测定白介素-6(IL-6)、肿瘤坏死因子(TNF)、一氧化氮(NO)、前列环素(PGI2)、脂联素、超敏CRP(HsCRP)等水平。结果:应用CoPP上调HO-1水平,能够改善糖尿病心梗大鼠左心室压力最大变化速率、左室射血分数、左室短轴缩短率,缩小左室舒张末期内径,升高血清胆红素、一氧化氮和前列环素水平,提高心肌组织磷酸化的内皮型一氧化氮合酶(peNOS)、磷酸化的活化蛋白激酶(pAkt)、磷酸化的腺苷活化的蛋白激酶(pAMPK)的表达,降低血清TNF-α、hs-CRP水平。使用SnMP后,能够阻断CoPP的上述作用。结论:上调HO-1通过peNOS、pAMPK途径能够长期地改善血管内皮功能,抑制炎症反应,提升血清胆红素等,有效抑制心室重塑,改善梗死后糖尿病大鼠远期的心功能。 | 李健 陈天萌 曹剑 陈德友 王浩 石海燕 高萌 范利 Abraham Nader G | 2014 | 中国应用生理学杂志2014，30，5： | 4 |
| 13 | Role of chemotherapy in prostate cancer显示文摘 | Rita Nader Joelle El Amm Jeanny B Aragon-Ching | 2018 | Asian Journal of Andrology2018，20，3： | 4 |
| 14 | Ag/TiO_2/freeze-dried graphene nanocomposite as a high performance photocatalyst under visible light irradiation显示文摘Ag/TiO_2/freeze-dried graphene nanocomposites have been prepared via a facile one-step solvothermal method for the photocatalytic degradation of Rh B under visible light irradiation. During the solvothermal process, reduction of graphene oxide and loading of Ag/TiO_2 nanoparticles on graphene sheets were achieved. Investigation of chemical state of products showed that covering of Ag/TiO_2 surface with higher weight ratio of graphene resulting in that Ag metals in Ag/TiO_2 were oxidized to Ag2 O in nanocomposite structure after solvothermal process. Degree of photocatalytic activity enhancement strongly depends on the coverage of Ag/TiO_2 surface by porous graphene. The sample of 1 wt% porous graphene hybridized Ag/TiO_2 showed the highest photocatalytic activity, which is related to high migration efficiency of photoinduced of electrons and reduction of electron–hole recombination rate due to high electrical conductivity of graphene. Expanding of absorption to visible light region was ascribed to surface plasmon resonance effect of Ag metals and presence of graphene. Investigation of photocatalytic performance of formic acid as a dye-less organic pollutant showed that dye sensitization effect of Rh B molecules during evaluation of photocatalytic performance was negligible. | Ziaeddin Jafari Nader Mokhtarian Ghader Hosseinzadeh Mousa Farhadian Asghar Faghihi Farideh Shojaie | 2016 | Journal of Energy Chemistry2016，25，3： | 4 |
| 15 | 以金属硫酸氢盐为催化剂在无溶剂条件下高效合成3,4-二氢嘧啶-2(1H)-酮显示文摘以金属硫酸氢盐M(HSO4)n(Ca(HSO4)2,Zn(HSO4)2和过硫酸氢钾制剂oxone○R)为催化剂催化醛、1,3-二羰基化合物和尿素进行缩合反应,在90℃及无溶剂的条件下高收率、一锅法合成了3,4-二氢嘧啶-2(1H)-酮. | Khodabakhsh NIKNAM Mohammad Ali ZOLFIGOL Zahra HOSSIENINEJAD Nader DANESHVAR | 2007 | 催化学报2007，28，7： | 3 |
| 16 | 微空心阴极维持放电的实验研究显示文摘为在高气压下形成大体积均匀等离子体,将微空心阴极放电(MHCD)作为等离子体阴极,引入另一阳极而设计为微空心阴极维持放电(MCSD)的发生装置。实验研究了MCSD的产生放电条件,通过在氩气中添加少量氮气,分析氮分子第一正带系发射光谱的方法测量了MCSD中羽流区不同位置的气体温度。研究表明,当等离子体阴极电流增加到一个临界值(约为0.5~1mA)以后,在等离子体阴极与诱导阳极之间才会出现大体积辉光放电,羽流区气体温度在实验条件下约为500K。MCSD减缓了辉光向弧光的转变,在高气压下可产生稳定的大体积辉光放电。 | 夏广庆 Nader Sadeghi | 2011 | 光谱学与光谱分析2011，31，1： | 3 |
| 17 | 一种新颖的微空心阴极放电等离子体推力器显示文摘微小卫星的发展和成功应用迫切需要新型微推力器的研制。微放电技术是等离子体放电中重要的一类,近几十年来成为各国的研究热点。其中,微空心阴极放电(MHCD)是一种新颖的非平衡高气压辉光放电,其优点是可以在高气压下稳定放电,并且只需要非常低的电压(几百伏特)或者输入功率(百毫瓦数量级)。MHCD建立在2个几百微米厚度的金属平面电极上,材料可以是钼、铝等,由电介质(云母或氧化铝)隔开。'三明治'的布局结构上从一个电极到另一个电极钻有直径为几十微米到几百微米的孔,气体压强可以很高,甚至超过大气压。微空心阴极放电较小的尺寸结构与强烈并可控的气体加热相结合,可以开发应用在新型的电热式微等离子体推进上。由于微空心阴极放电等离子体推力器在微放电等离子体中加热了工质气体,随后通过微喷管喷出产生推力,因此与传统的冷气微推力器相比,可大大提高推力器的比冲和推力。 | 夏广庆 毛根旺 Nader Sadeghi | 2008 | 固体火箭技术2008，31，6： | 3 |
| 18 | 非高密度脂蛋白胆固醇、载脂蛋白A-I及B100、标准脂质测量、脂质比值以及CRP作为女性心血管病危险因素的临床用途显示文摘背景:关于不同脂质测定、非高密度脂蛋白胆固醇(non-HDL-C)、脂质比值、载脂蛋白和C-反应蛋白(CRP)的临床应用,现行心血管危险检测指南仍有争议。
目的:直接比较总胆固醇(totalcholesterol,TC)、低密度脂蛋白胆固醇(LDL-C)、HDL-C、non-HDL-C、载脂蛋白A-I(apoA-I)及B100(apoB100)、高敏C-反应蛋白(高敏CRP)以及TC与HDL-C、LDL-C与HDL-C、apoB100与apoA-I、apoB100与HDL-C比值,在妇女作为将来心血管事件预测指标的临床用途。
设计、地点及参试者:于15 632例起始健康美国妇女进行的前瞻性队列研究。1992年11月至1995年7月人组时年龄≥45岁(4分位范围48~59岁)。所有参试者均经10年随访,观察将来心血管事件的发生情况。
主要观测指标:按照各项生化指标不同基线值而确定的首次主要心血管事件(n=4 764)的风险比(hazard ratios,HRs)及95%可信区间(confidence intervals,CIs)。
结果:在校正年龄、吸烟状况、血压、糖尿病及体重指数后,测量结果在最高5分位者将来发生心血管事件的风险比LDL-C为1.62(95%CI,1.17~2.25),apoA-I为1.75(95%CI,1.30~2.38),TC为2.08(95%CI,1.45~2.97),HDL-C为2.32(95%CI,1.64~3.33),apoB100为2.50(95%CI,1.68~3.72),non-HDL-C为2.51(95%CI,1.69~3.72),高敏CRP为2.98(95%CI,1.90~4.67)(P<0.001,趋势贯穿所有5分位)。脂质比值风险比,apoBl00与apoA-I为3.01(95%CI,2.01~4.50),LDL-C与HDL-C为3.18(95%CI,2.12~4.75),apoB100与HDL-C为3.56(95%CI,2.31~5.47),TC与HDL-C为3.81(95%CI,2.47~5.86)(P<0.001,趋势贯穿所有5分位)。高敏CRP与脂质参数的相关系数范围为-0.33到0.15,以CRP<1、1~3和>3 ms/L为临床分割点,可对每项脂质测量及脂质比值水平增加提供预后危险信息。
结论:non-HDL-C以及TC与HDL-C比值对将来心血管事件的预测效果与载脂蛋白相同或者更好。校正年龄、血压、吸烟、糖尿病和肥胖后,高敏CRP提供的预后信息超越各项脂质测量。 | Paul M Ridker Nader Rifai Nancy R.Cook Gary Bradwin Julie E Buring 徐成斌(译) | 2006 | 美国医学会杂志(中文版)2006，25，3： | 3 |
| 19 | Comparative induction of controlled circulation by magnesium and remifentanil in spine surgery显示文摘AIM: To evaluate the efficacy of magnesium sulfate(MGS) in comparison with remifentanil for induction of relative hypotension in posterior fusion of spine(PSF).METHODS: In this randomized clinical trial, 40 patients with the American Society of Anesthesiologists Ⅰ and Ⅱ physical status undergoing lumbar PSF were randomized to receive remifentanil(REM) 0.15 μg/kg or MGS 50 mg/kg for controlled hypotension. The administering anesthesiologist was blinded to the medication. Continuous infusion was maintained at a fixed volume rate to deliver precalculated doses of either study drugs. All other aspects of anesthesia and surgery were similar in the two groups. The target mean arterial pressure(MAP) range used in this study was 60-70 mm Hg. In the course of surgery, the hemodynamic variables, volumeof blood loss, urine output, fluid intake and surgeon's satisfaction were recorded. Data was analyzed with SPSS version 13.0 and P values less than 0.05 were considered significant.RESULTS: Twenty patients in the MGS group and 19 patients in the REM group were studied. There was no difference between the two groups in the hemodynamic variables, blood loss, urine output, fluid requirement and surgeon's satisfaction for exposure. The target MAP was achieved in 75% of Mg and 58% of remifentanil groups. Although a higher number of patients in the REM group required nitroglycerin(42.1%) to reach the target MAP than those in the MGS group(25%), this difference was not statistically significant(P = 0.32).CONCLUSION: Our findings showed that in patients undergoing lumbar PSF surgery, remifentanil and MGS have a similar hypotensive effect and comparable amount of blood loss without any significant adverse effects. | Mohammad R Ghodraty Mohammad M Homaee Kourosh Farazmehr Ali R Nikzad-Jamnani Masoud Soleymani-Dodaran Ali R Pournajafian Nader D Nader | 2014 | World Journal of Orthopedics2014，5，1： | 3 |
| 20 | Ionic Conductivity in Gelatin-Based Hybrid Solid Electrolytes:The Non-trivial Role of Nanoclay显示文摘In this study, the ionic conductivity behavior in hybrid gelatin-based transparent electrolytes including various types of nanoclays with different size, shape and surface properties was characterized. The effects of nanoclay type and nanoclay concentration as well as different experimental conditions, e.g., p H, temperature and crosslinking were also investigated. In general, the impedance spectroscopy results suggested a nontrivial role for nanoclay. Regardless of the nanoclay type, the ionic conductivity slightly increased first and then decreased by increasing the nanoclay concentration. Furthermore, among sodium montmorillonite(Na t MMT), lithium montmorillonite(Li t MMT), laponite and hydrotalcite, the hybrid electrolytes prepared by Li t MMT showed higher ionic conductivity. The results also showed that the chemical crosslinking along with sample preparation at optimum p H, where the gelatin chains might be efficiently adsorbed on exfoliated,negatively charged clay nanosheets, plays an important role. In comparison with the ionic conductivity of the neat sample at room temperature(w107S cm1), a ten-fold increase was observed for the crosslinked sample containing 2 wt% of Li t MMT prepared at optimum p H 3.5. The conductivity behavior as a function of temperature revealed the obedience with the Vogel e Fulcher e Tammann(VFT) model for all samples,suggesting the important role of segmental motions in the ionic conductivity. Finally, a qualitative explanation was presented for the mechanism of the ionic conduction in gelatin-nanoclay hybrid electrolytes. | Ali Ghadami Nader Taheri Qazvini Nasser Nikfarjam | 2014 | Journal of Materials Science & Technology2014，30，11： | 3 |
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