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64篇 您的检索式:作者名="ABDUL MALIK"
    题名 作者 年代 出处 被引量
1溶胶-凝胶法制备用于分离极性有机化合物的毛细管气相色谱柱显示文摘采用溶胶 凝胶法制备了用于分离有机极性化合物的毛细管气相色谱柱 ,其制备工艺简单 ,制柱时间较传统工艺大为缩短。该柱涂层与毛细管内壁间形成的化学键使得其热稳定性好。游离的脂肪酸、有机碱可直接在该柱上得到很好的分离 ,其他极性化合物也在该柱上得到极好的分离。该类色谱柱不仅在同一色谱柱上显示了良好的分离重复性 ,而且不同柱间在容量因子、柱效。王东新 MALIK Abdul 2002色谱2002,20,3:25
2溶胶-凝胶毛细管气相色谱柱热稳定性的考察显示文摘溶胶 凝胶毛细管气相色谱柱是一类新型的色谱柱。通过与静态法涂渍并用自由基引发交联使固定相固载化的色谱柱比较 ,溶胶 凝胶色谱柱除了具有制作工艺简单、分离效果好等特点外 ,还具有很好的热稳定性和溶剂稳定性。其工作温度可高于 4 0 0℃。王东新 Abdul Malik 2003分析化学2003,31,4:17
3Pyogenic liver abscess: Changing patterns in approach显示文摘AIM: To define optimum management of the pyogenic liver abscess and assess new trends in treatment. METHODS: One hundred and sixty nine patients with pyogenic liver abscess managed at Sher-i-Kashmir In- stitute of Medical Sciences, Srinagar, Kashmir (India) from July 2001 to August 2006 were studied to evaluate and define the optimum treatment. RESULTS: Mortality in the surgically treated group of patients was 9.4% (12/119), while those treated non-surgically had a fatality rate of 16.66% (7/42). Multiple liver abscesses treated surgically had a surprisingly low mortality of 30%. The biliary tract (64.97%) was the most common cause of liver abscess. Multiple abscesses, mixed organisms and abscess complications are all associated with a significantly increased mortality. However, the lethality of the primary disease process was the most important factor in determining survival.CONCLUSION: Transperitoneal surgical drainage and antibiotics are the mainstay of treatment. Percutaneous drainage is recommended for high risk patients only.Ajaz A Malik Shams UL Bari Khawaja Abdul Rouf Khurshid Alam Wani 2010World Journal of Gastrointestinal Surgery2010,2,12:15
4聚二甲基硅氧烷溶胶凝胶气相色谱毛细管柱与传统毛细管柱的柱容量比较显示文摘将十一烷和荧蒽分别注入溶胶 凝胶法涂渍的聚二甲基硅氧烷气相色谱毛细管柱和传统的聚二甲基硅氧烷毛细管柱并测量柱效率。在注射量增加到一定程度以后,柱效率迅速下降。能引起柱效率下降10%的注射量称之为柱容量。实验结果表明溶胶 凝胶聚二甲基硅氧烷柱的柱容量远高于传统聚二甲基硅氧烷柱的柱容量。对溶胶 凝胶聚二甲基硅氧烷柱有较高柱容量的原因进行了探讨。王东新 MALIK Abdul 2002色谱2002,20,6:8
5接枝聚硅氧烷环糊精固定相溶胶-凝胶毛细管气相色谱柱分离内酯对映体显示文摘参照文献方法合成了4种以环糊精为侧链的含氢聚甲基硅氧烷。在4种不同的合成物中,环糊精或是以本身不同的位置与主链相连,或是连接臂的结构不同,亦或是连接臂的长短各异。分别用合成的4种化合物为固定相,首次采用溶胶-凝胶法制备了气相色谱手性毛细管柱。在这些色谱柱上,以手性化合物(±)γ-苯基-γ-丁内酯为探测物对4种色谱柱的柱效率、手性选择性、容量因子、分离度及固定相的极性等各种色谱参数进行了测定,并将测定的数值进行了比较。发现环糊精以圆台较小的一端与含氢硅油相连,连接臂中不含苯氧基而含有醚键,连接臂较短(含4个亚甲基)的固定相是所合成的4种固定相中的最佳选择。王东新 Abdul Malik 2007分析化学2007,35,3:8
6环糊精-聚硅氧烷共聚物溶胶-凝胶气相色谱毛细管柱分离特性研究显示文摘用环糊精与低聚硅氧烷的共聚物为固定相制成了溶胶-凝胶毛细管气相色谱柱。比较了支臂与环糊精的不同位置(6A6C与6A6D)相连接的共聚物为固定相的手性分离的区别,也比较了不同的臂长和不同的臂结构对手性化合物拆分产生的影响。结果表明:含有4个亚甲基和醚键结构的连接臂且与环糊精的6A6C位置相连接的共聚物是这几种结构中的最佳固定相。王东新 Abdul Malik 2005分析化学2005,33,8:7
7Antioxidant and antiangiogenic activities of the essential oils of Myristica fragrans and Morinda citrifolia显示文摘Objective:Toinvestigate the anti-angiogenic activity and antioxidant properties of Myristica fragrans(M.fragrans)(nutmeg) and Morinda citrifolia(M.citrifolia)(mengkudu) oils. Methods:The nutmeg and megkudu essential oils were obtained by steam distillation. The antioxidant activities of both essenlial oils were delermined by beta-carotene/ linoleic acid bleaching assay and reducing power while the anti-angiogenic activity was investigated using rat aortic ring assay using various concentrations.Results:The results showed that nutmeg oil has higher antioxidant activity than mengkudu oil.The nutmeg oil effectively inhibited the oxidation of linoleic acid with(88.68±0.1)%while the inhibition percentage of oxidation of linoleic acid of the mengkudu oil is(69.44±0.4)%.The nutmeg oil and mengkudu oil showed reducing power with an EC50 value of 181.4μg/mL and 3 043.0μg/mL,respectively.The anliangiogenic activity of nutmeg oil showed significant antiangiogenic activity with IC50 of 77.64μg/mL comparing to mengkudu oil which exhibits IC50 of 109.30μg/mL.Conclusion:Bioactive compound(s) will be isolated from the nutmeg essential oil to be developed as antiangiogenic drugs.Suthagar Pillai Piaru Roziahanim Mahmud Amin Malik Shah Abdul Majid Zeyad Daoud Mahmoud Nassar 2012Asian Pacific Journal of Tropical Medicine2012,5,4:3
8Interaction of cetyltrimethylammonium bromide with drug in aqueous/electrolyte solution:A combined conductometric and molecular dynamics method study显示文摘Interaction between beta-lactum antibiotic drug ciprofloxacin hydrochloride(CFH)and cationic surfactant cetyltrimethylammonium bromide(CTAB)was performed conductometrically in aqueous as well as in the occurrence of different salts(NaCl,KCl as well as NH_4Cl)over the temperature range of 298.15–323.15 K at the regular interval of 5 K.CFH drug has been suggested for the treatment of bacterial infections such as urinary tract infections and acute sinusitis.A clear critical micelle concentration(CMC)was obtained for pure CTAB as well as(CFH+CTAB)mixed systems.The decrease in CMC values of CTAB caused by the addition of CFH reveals the existence of the interaction between the components and therefore it is the indication of micelle formation at lower concentration of CTAB and their CMC values further decrease in attendance of salts.A nonlinear behavior in the CMC versus T plot was observed in all the cases.The ΔG_m^0 values are found to be negative in present study systems demonstrated the stability of the solution.The values of ΔH_m^0 and ΔS_m^0 reveal the existence of hydrophobic and electrostatic interactions between CFH and CTAB.The thermodynamic properties of transfer for the micellization were also evaluated and discussed in detail.Molecular dynamic simulation disclosed that environment of water and salts have impact on the hydrophobic interaction between CFH and CTAB.In water and salts,CTAB adopts spherical micelle in which charged hydrophilic groups are interacted with waters whereas hydrophobic tails form the core of the micelle.This hydrophobic core region is highly conserved and protected.In addition,micelle formation is more favorable in aqueous Na Cl solution than other solutions.Md.Anamul Hoque Md.Masud Alam Mohammad Robel Molla Shahed Rana Malik Abdul Rub Mohammad A.Halim Mohammed Abdullah Khan Farida Akhtar 2018Chinese Journal of Chemical Engineering2018,26,1:3
9传统溶剂提取法和超临界流体萃取法对钟花蒲桃次生代谢产物的回收率的比较研究(英文)显示文摘目的:寻求一种最佳的钟花蒲桃次生代谢产物的萃取方法,以实现在工业上的应用。创新点:全面深入地比较传统溶剂提取法和超临界流体萃取法对钟花蒲桃的主要次生代谢产物的回收率。方法:在超临界流体萃取法中,应用Box-Behnken设计,以压力、温度和萃取粒径大小为自变量,以粗提取物、个别的和总的次生代谢产物的百分比产量为因变量。另外,还研究了调节剂乙醇对产量的影响。在传统溶剂提取中,结合十种不同的溶剂和三不同的技术(浸提、索氏和回流)产生二十种不同的提取产物。通过高效液相色谱法检测不同的提取方法对钟花蒲桃的主要次生代谢产物的回收率。结论:超临界流体萃取法优于传统溶剂提取法,省成本又省时。因此在工业使用上,超临界流体萃取法可替代传统溶剂提取法。Abdul Hakeem MEMON Mohammad Shahrul Ridzuan HAMIL Madeeha LAGHARI Fahim RITHWAN Salman ZHARI Mohammed Ali Ahmed SAEED Zhari ISMAIL Amin Malik Shah Abdul MAJID 2016Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2016,17,9:2
10Mesuaferrea stem bark extract induces apoptosis and inhibits metastasis in human colorectal carcinoma HCT 116 cells, through modulation of multiple cell signalling pathways显示文摘Considering the great potential of natural products as anticancer agents, the present study was designed to explore the molecular mechanisms responsible for anticancer activities of Mesua ferrea stem bark extract against human colorectal carcinoma. Based on MTT assay results, bioactive sub-fraction(SF-3) was selected for further studies using HCT 116 cells. Repeated column chromatography resulted in isolation of less active α-amyrin from SF-3, which was identified and characterized by GC-MS and HPLC methods. α-amyrin and betulinic acid contents of SF-3 were measured by HPLC methods. Fluorescent assays revealed characteristic apoptotic features, including cell shrinkage, nuclear condensation, and marked decrease in mitochondrial membrane potential in SF-3 treated cells. In addition, increased levels of caspases-9 and-3/7 levels were also observed in SF-3 treated cells. SF-3 showed promising antimetastatic properties in multiple in vitro assays. Multi-pathway analysis revealed significant down-regulation of WNT, HIF-1α, and EGFR with simultaneous up-regulation of p53, Myc/Max, and TGF-β signalling pathways in SF-3 treated cells. In addition, promising growth inhibitory effects were observed in SF-3 treated HCT 116 tumour spheroids, which give a hint about in vivo antitumor efficacy of SF-3 phytoconstituents. In conclusion, these results demonstrated that anticancer effects of SF-3 towards colon cancer are through modulation of multiple molecular pathways.Muhammad Asif Armaghan Shafaei Aman Shah Abdul Majid Mohammed Oday Ezzat Saad S Dahham Mohamed B.Khadeer Ahamed Chern Ein Oon Amin Malik Shah Abdul Majid 2017Chinese Journal of Natural Medicines2017,15,7:2
11Effect of different additives on the phase separation behavior and thermodynamics of p-tert-alkylphenoxy poly (oxyethylene) ether in absence and presence of drug显示文摘Cloud point(CP) determinations of 4-(1,1,3,3-tetramethylbutyl)phenyl-polyethylene glycol(TX-100(nonionic surfactant)) was carried out in aqueous as well as in the attendance of drug(ceftriaxone sodium trihydrate(CFT))/(CFT + different inorganic salts) and discussed thoroughly. Nonionic surfactants are employed extensively in different formulations. In aqueous solution, the values of CP of TX-100 are obtained to increase by means of enhancing of their concentration in the solution. The CP values of TX-100 solutions were found to decrease in the presence of drug and their values decrease more with rising concentrations of the drug. The values of CP of CFT and TX-100 mixtures were found to further decrease in the attendance of inorganic salts in comparison to their absence. The effect of different sodium salts in decreasing CP values of TX-100 was achieved in the following order: NaCO_3 > Na_2SO_4 > Na Cl. However, in the case of potassium and ammonium salts, the decreasing order obtained is K_2SO_4 > KCO_3 > KCl and(NH4)2 SO_4 > Na_2CO_3 > NH_4Cl respectively. Various thermodynamic parameters for example standard free energy(ΔG_c~Θ), standard enthalpy(ΔH_c~Θ) as well as standard entropy(Δ Sc?)changes of phase separation were also evaluated and discussed in detail on the basis of their behavior.Marzia Rahman Md. Anamul Hoque Mohammed Abdullah Khan Malik Abdul Rub Abdullah M. Asiri 2018Chinese Journal of Chemical Engineering2018,26,5:2
12Roles of organic soil amendments and soil organisms in the biological control of plant-parasitic nematodes: a review显示文摘Mohammad Akhtar Abdul Malik 2000Bioresource Technology2000,,1:2
13Stigmsteryl galac- toside from Rhynchosia minima 显示文摘Wasim Ahmed Zaheer Ahmad Abdul Malik 1992Phytochemistry1992,31,11:1
14Prevalence of the mitochondrial DNA A1555G mutation in sensorineural deafness patients in island Southeast Asia显示文摘Safarina G. Malik Nova Pieter Herawati Sudoyo Abdul Kadir Sangkot Marzuki 2003Journal of Human Genetics2003,,9:1
15Papaya Ring Spot Virus:An Understanding of a Severe Positive-Sense Single Stranded RNA Viral Disease and Its Management显示文摘Viral diseases have been studied in-depth for reducing quality,yield,health and longevity of the fruit,to highlight the economic losses.Positive-sense single-stranded RNA viruses are more devastating among all viruses that infect fruit trees.One of the best examples is papaya ringspot virus(PRSV).It belongs to the genus Potyvirus and it is limited to cause diseases on the family Chenopodiaceae,Cucurbitaceae and Caricaceae.This virus has a serious threat to the production of papaya,which is famous for its high nutritional and pharmaceutical values.The plant parts such as leaves,latex,seeds,fruits,bark,peel and roots may contain the biological compound that can be isolated and used in pharmaceutical industries as a disease control.Viral disease symptoms consist of vein clearing and yellowing of young leaves.Distinctive ring spot patterns with concentric rings and spots on fruit reduce its quality and taste.The virus has two major strains P and W.The former cause disease in papaya and cucurbits while the later one in papaya.Virion comprises 94.4%protein,including a 36 kDa coat protein which is a component responsible for a non-persistent transmission through aphids,and 5.5%nucleic acid.Cross protection,development of transgenic crops,exploring the resistant sources and induction of pathogen derived resistance have been recorded as effective management of PRSV.Along with these practices reduced aphid population through insecticides and plant extracts have been found ecofriendly approaches to minimize the disease incidence.Adoption of transgenic crops is a big challenge for the success of disease resistant papaya crops.The aim of this review is to understand the genomic nature of PRSV,detection methods and the different advanced control methods.This review article will be helpful in developing the best management strategies for controlling PRSV.Muhammad Umer Mustansar Mubeen Yasir Iftikhar Haider Ali Muhammad Zafar-ul-Hye Rafia Asghar Mazhar Abbas Malik Abdul Rehman Ernesto A.Moya-Elizondo Yuejun He 2022Phyton-International Journal of Experimental Botany2022,91,10:1
16Verticilliside, a new flavone C-glucoside from Enicostemma verticillatum显示文摘Erum Jahan Shagufta Perveen Abdul Malik 2009Journal of Asian Natural Products Research2009,,3:1
17A new macrocyclic diterpene ester from the latex of Euphorbia tirucalli 显示文摘Khan A Q Abdul Malik 1990Journal of Natural Products1990,3,53:1
18Assessment of an index of biological integrity (IBI) to quantify the quality of two tributaries of river Chenab, Sialkot, Pakistan显示文摘Abdul Qadir Riffat Naseem Malik 2009Hydrobiologia2009,,1:1
19溶胶-凝胶气相色谱柱的柱容量的研究显示文摘 新型的溶胶-凝胶毛细管气相色谱柱除了具有热稳定性高及分离效果好的特点外,此色谱柱的柱容量(samplecapacity)数倍于传统的用静态法涂渍固定相并用交联反应使之固载化的色谱柱的柱容量.在两种不同的色谱柱上,逐渐增加试样的进样量,柱效率随之变化.进样量对柱效率的影响清楚地表明了溶胶-凝胶柱的柱容量远高于传统柱.王东新 Abdul Malik 2002南京师大学报(自然科学版)2002,25,4:1
20查看详情显示文摘Dey S.K Bag B Abdul Malik K.M El Fallah M.S Ribas J Mitra S 0,,:1
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