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| 1 | Interactions of zinc and cadmium toxicity in their effects on growth and in antioxidative systems in tomato plants (Solanum lycopersicum)显示文摘The interaction between zinc and cadmium was investigated in tomato plants (Solanum lycopersicum). Ten-day-old seedlings were treated with 10 μmol/L CdCl 2 associated to different concentrations of ZnCl 2 (10, 50, 100, and 150 μmol/L). Zn supply clearly reduced Cd accumulation in leaves and simultaneously increased Zn concentration. Cd induced oxidative stress in leaves as indicated by an increase in thiobarbituric acid-reactive substances (TBARS) level and chlorophyll breakdown. Furthermore, compared with control, Cd-treated plants had significantly higher activities of superoxide dismutase (SOD, EC 1.15.1.1), whereas, catalase (CAT, EC 1.111.1.6), ascorbate peroxidase (APX, EC 1.11.1.11), and glutathione reductase (GR, EC 1.6.4.2) activities were significantly suppressed by Cd addition. Zn supplementation, at low level, restored and enhanced the functional activity of these enzymes (SOD, CAT, APX and GR) as compared to Cd-alone-treated plants. The beneficial effect of adequate Zn level on Cd toxicity was confirmed by a significant decrease in TBARS level and restoration of chlorophyll content. However, when Zn was added at high level in combination with Cd there was an accumulation of oxidative stress, which was higher than that for Cd or excess Zn alone treatments. These results suggested that higher Zn concentrations and Cd are synergistic in their effect on plant growth parameters and oxidative stress. | Jaouhra Cherif Chamseddine Mediouni Wided Ben Ammar Fatma Jemal | 2011 | Journal of Environmental Sciences2011,23,5: | 19 |
| 2 | Isolation and characterization of facultative mixotrophic ammonia-oxidizing bacteria from constructed wetlands显示文摘Autotrophic ammonia-oxidizing bacteria (AOB) have been widely studied in constructed wetlands systems,while mixotrophic AOB have been less thoroughly examined.Heterotrophic bacteria were isolated from wastewater and rhizospheres of macrophytes of constructed wetlands,and then cultivated in a mixotrophic medium containing ammonium and acetic acid.A molecular characterization was accomplished using ITS-PCR amplification,and phylogenetic analysis based on 16S rRNA gene sequences.Results showed the presence of 35 bacteria,among 400 initially heterotrophic isolates,that were able to remove ammonia.These 35 isolates were classified into 10 genetically different groups based on ITS pattern.Then,a collection of 10 isolates were selected because of their relatively high ammonia removal efficiencies (ARE 80%) and their phylogenetic diversity.In conditions of mixotrophy,these strains were shown to be able to grow (increase of optical density OD 660 during incubation with assimilation of nitrogen into cellular biomass) and to oxidize ammonia (important ammonia oxidation efficiencies,AOE between 79% and 87%).Among these facultative mixotrophic AOB,four isolates were genetically related to Firmicutes (Bacillus and Exiguobacterium),three isolates were affiliated to Actinobacteria (Arthrobacter) and three other isolates were associated with Proteobacteria (Pseudomonas,Ochrobactrum and Bordetella). | Soulwène Kouki Neila Saidi Fadhel M'hiri Houda Nasr Hanène Cherif Hadda Ouzari Abdennaceur Hassen | 2011 | Journal of Environmental Sciences2011,23,10: | 9 |
| 3 | 高取代度淀粉醋酸酯合成工艺优化及结构表征显示文摘以玉米淀粉为实验材料,在催化剂用量、醋酸与醋酸酐体积比、反应时间、反应温度4个单因素试验基础上,利用响应面试验设计法进行试验设计,获得取代度与各单因素的函数关系,并建立高取代度淀粉醋酸酯合成工艺模型。通过回归方程和响应曲面,得到淀粉醋酸酯最佳合成工艺为催化剂用量0.11mL、醋酸与醋酸酐体积比1:1.39、反应时间1.59h、反应温度87.61℃。验证实验结果显示,在此条件下淀粉醋酸酯取代度为2.95。傅里叶红外光谱分析表明,淀粉醋酸酯葡萄糖单元上的羟基逐渐发生酯化,而且随着取代度测定值升高,乙酰基含量增大。扫描电镜照片显示,淀粉醋酸酯表面变得更为粗糙,孔隙增多且呈蜂窝状,说明酯化反应不仅发生在淀粉颗粒表面,同时也发生在淀粉颗粒内部。 | 李海龙 陈鹏 DIOP Cherif Ibrahima Khalil 谢笔钧 孙智达 | 2011 | 食品科学2011,32,4: | 4 |
| 4 | 微波辅助法合成淀粉醋酸酯及其理化性质研究显示文摘以玉米淀粉为实验材料,在微波辅助加热条件下,研究醋酸与醋酸酐体积比(酸酐比)对合成淀粉醋酸酯取代度的影响。分别采用红外光谱仪、扫描电镜、X-射线衍射仪、差示扫描量热仪、凝胶色谱等方法对合成淀粉醋酸酯的化学结构、颗粒形貌、结晶特性、热特性、分子质量分布进行表征;进而比较不同酸酐比条件下淀粉醋酸酯的理化性质变化。实验结果显示,酸酐比对于合成淀粉醋酸酯取代度有较大影响,随着醋酸酐用量增加,取代度先增大后减小,在酸酐体积比1∶1处取代度达到最大值2.92。此外,新合成淀粉醋酸酯的化学结构和物化性质相对于原淀粉发生较大变化。淀粉分子中的羟基比例减少,羰基比例增大;改性淀粉颗粒表面呈多孔状或崩解成许多细小颗粒;改性后,淀粉原有的晶形结构遭到破坏并发生重构,结晶度降低;淀粉醋酸酯的热特性也发生较大变化,主要表现为玻璃化温度和熔融温度降低,由此说明淀粉醋酸酯相对于原淀粉具有更好的热塑性;淀粉醋酸酯分子质量相对于原淀粉减小,分子质量分布变宽,表明淀粉分子链在酯化过程中发生一定程度断裂。 | 李海龙 付晓燕 陈鹏 Cherif I K Diop 谢笔钧 孙智达 | 2011 | 食品与发酵工业2011,37,2: | 3 |
| 5 | DYNAMICS OF NEW CLASS OF HOPFIELD NEURAL NETWORKS WITH TIME-VARYING AND DISTRIBUTED DELAYS显示文摘In this paper,we investigate the dynamics and the global exponential stability of a new class of Hopfield neural network with time-varying and distributed delays.In fact,the properties of norms and the contraction principle are adjusted to ensure the existence as well as the uniqueness of the pseudo almost periodic solution,which is also its derivative pseudo almost periodic.This results are without resorting to the theory of exponential dichotomy.Furthermore,by employing the suitable Lyapunov function,some delay-independent sufficient conditions are derived for exponential convergence.The main originality lies in the fact that spaces considered in this paper generalize the notion of periodicity and almost periodicity.Lastly,two examples are given to demonstrate the validity of the proposed theoretical results. | Adnene ARBI Farouk CHERIF Chaouki AOUITI Abderrahmen TOUATI | 2016 | Acta Mathematica Scientia2016,36,3: | 3 |
| 6 | 耐亚胺培南铜绿假单胞菌oprD2基因与金属酶的检测显示文摘目的研究oprD2基因与金属酶(MBL)在亚胺培南耐药机制中的作用。方法对天津地区3所综合医院临床分离60株亚胺培南耐药的铜绿假单胞菌,以2-巯基乙醇(2-MPA)为酶抑制剂,在MH平皿上用纸片扩散法进行抗生素协同敏感性检测,并用PCR检测MBL基因和oprD2基因。结果60株临床分离的耐亚胺培南铜绿假单胞菌(imipenem-resistant Pseudomonas aeruginosa,IRPA)中,2-MPA方法筛选出15株(25%)MBL阳性;以PCR方法检测,22株(36.4%)oprD2基因阳性,19株(31.7%)产生IMP-1型MBL,未发现VIM-2与IMP-2酶,7株IRPA同时含有IMP-1和oprD2基因。结论IMP-1为天津地区IRPA产MBL的主要类型,也是临床分离铜绿假单胞菌亚胺培南耐药的重要原因之一。 | Diallo Mamadou Cherif 魏殿军 曹阳 马全玲 刘扬 门昆 武大伟 | 2008 | 中国感染与化疗杂志2008,8,5: | 2 |
| 7 | Superselective embolisation of bilateral superior vesical arteries for management of intractable hematuria in context of metastatic bladder cancer显示文摘Hematuria due to locally advanced or metastatic bladder cancer is a common condition and is often a management problem.Percutaneous embolisation is a mini-invasive option to handle this situation.We report a case of a patient with a metastatic bladder cancer and who presented with an abundant hematuria and severe anemia.After failure of endoscopic resections and“flush”of radiotherapy haemostatic and refusal of cystectomy by the patient,he was treated by superselective embolisation of bilateral superior bladder arteries with excellent immediate results.The technique is safe and effective in the short term.The longterm effectiveness requires further investigation. | Ahmed Saadi Abderrazak Bouzouita Mohamed Hedi Rebai Mohamed Cherif Walid Kerkeni Haroun Ayed Amine Derouiche Hatem Rajhi Riadh Ben Slama Najla Mnif Mohamed Chebil | 2017 | Asian Journal of Urology2017,4,2: | 2 |
| 8 | 测量纱线长度和速度的非接触式传感器显示文摘介绍了一种新型测量纱线长度和速度的传感器,该传感器的功能已由实验证实。其原理是利用纱线上的静电荷进行非接触测量。所研制的传感器能用于测量各种原料纱线的长度和速度。在实际应用中,这种传感器可用于一些尚无经济实用解决方案的场合。 | B. Mrozik G. Hoffmann C. Cherif U. Neumann J. Posvic 张琳(译) 李毓陵(校) | 2006 | 国际纺织导报2006,34,12: | 2 |
| 9 | 85例肢体枪弹伤的早期外科处理显示文摘目的总结85例枪弹伤早期外科处理的经验和教训。方法对肢体枪弹伤患者进行早期清创、引流并应用抗生素治疗,合并骨折者进行适当固定。20例切线伤中有15例行一期伤口闭合。结果85例枪弹伤的总感染率为23.5%,伤情较轻的切线伤感染者有8例。结论早期肢体枪弹伤处理应当重视创口的减压和充分引流,重视环境因素的影响。 | 付立新 刘利民 Oumar Cherif | 2008 | 首都医科大学学报2008,29,5: | 2 |
| 10 | 借助结构噪声分析检测纺织机械故障显示文摘结构噪声分析或者说振动分析是一种新型的评估纺织机械运行状况的方法。它可及早发现磨损部件,并可在因个别机器部件彻底崩溃而导致机器停车之前及时更换磨损部件。磨损部件的及早检测能给生产带来显著的经济效益。 | T. Pusch C. Cherif A. Farooq S. Wittenberg R. Hoffmann C. Tschpe 王英梅 | 2009 | 国际纺织导报2009,37,6: | 2 |
| 11 | Effects of acetic acid/acetic anhydride ratios on the properties of corn starch acetates显示文摘 | Cherif Ibrahima Khalil Diop Hai Long Li Bi Jun Xie John Shi | 2010 | Food Chemistry2010,,4: | 2 |
| 12 | Defense response induced by soluble silicon in cucumber roots infected by Pythium spp显示文摘 | Cherif M Asselin A Belanger R R | 1994 | Phytopathol1994,84,: | 1 |
| 13 | Full vector beam propagation method modeling of dual core photonic crystal fibre couplers 显示文摘 | Rim Cherif Mourad Zghal RihabChatta | 2006 | SPIE2006,,: | 1 |
| 14 | Ga doped SBA-15 as an active and stable catalyst for Friedel-Crafts liquid-phase acylation 显示文摘 | Zora E1 Berrichi Leila Cherif Orsen O | 2006 | Applied Catalysis A : Gene- ral2006,298,1: | 1 |
| 15 | 调节服装微循环气候的经编间隔织物显示文摘德国德累斯顿工业大学纺织服装学院对经编间隔织物的舒适性能进行了研究,该项计划编号为ALF13086,主要针对于经编间隔织物的产品开发及其性能研究,目的是探讨经编间隔织物选用纤维材料以及纤维的数量对织物热湿传递性能的影响。 | K. Machova G. Hoffmann C. Cherif 钱程(译) 申熠(校) | 2007 | 国际纺织导报2007,35,3: | 1 |
| 16 | Denitrification of drinking water by the association of an electrodialysis process and a membrane bioreactor: feasibility and application 显示文摘 | Wisniewski C Pepsin F Cherif T | 2001 | Desalination2001,139,: | 1 |
| 17 | Mathematical analysis of a multiple strain, multilocusallele system for antigenically variable infectious diseases revisited显示文摘 | Cherif A | 2015 | Math Biosci2015,267,: | 1 |
| 18 | Risk factors of the failure of surfactant treatment by transient intubation during nasal continuous positive airway pressure in preterm infants 显示文摘 | CHERIF A HACHANI C KHROUF N | 2008 | Am J Pefinatol2008,25,10: | 1 |
| 19 | Rh-deficiency of the regulator type caused by splicing mutations in the human RH50 gene显示文摘 | CHERIF ZAHAR B MATASSI G RAYNAL V | 1998 | Blood1998,92,7: | 1 |
| 20 | Studies of silicon distribution in wounded an~t pythium uhimum in- fected cucumber plants 显示文摘 | CHERIF M MENZIES J G BENHAMOU N | 1992 | Physiological and Molecular Plant Pathology1992,41,5: | 1 |