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372篇 您的检索式:作者名="Ayub"
    题名 作者 年代 出处 被引量
1Effects of partial slip on flow of a third grade fluid显示文摘这篇论文是经过一个多孔的盘子与的第三等级液体的旋转流动的分析研究部分滑动效果。它为聚合物的学习担任一个流动模型。分析答案用 homotopy 分析方法(火腿) 被决定了。S. Asghar M. Mudassar Gulzar M. Ayub 2006Acta Mechanica Sinica2006,22,5:6
2Etiology of fulminant hepatic failure:experience from a tertiary hospital in Bangladesh显示文摘BACKGROUND: Fulminant hepatic failure (FHF) is not uncommon in our clinical practice in Bangladesh. There was a rise in acute hepatitis E virus (HEV) in Bangladesh after the 2004 floods. At that time, most of the country was under water for more than a month, leading to sewage contamination of the water supply. The aim of this study was to investigate the etiology of FHF in Bangladesh. METHODS: In this retrospective study, 23 patients with FHF who presented with severe impairment of hepato- cellular function (i.e. encephalopathy, coagulopathy and jaundice) within 6 months of onset of symptoms were included. There were 17 men and 6 women, aged from 18 to 32 years. Four of the women were pregnant. Patients were tested for markers for common hepatotrophic viruses. A relevant history was taken and the Patient Record Book of the Unit was reviewed. RESULTS: 56.52% patients (13/23) had HEV infection, and all were anti-HEV IgM-positive tested by ELISA. HBV infection was detected in 34.78% patients (8/23), all of whom were tested positive for either HBsAg or anti-HBs IgM by ELISA. 8.7% patients (2/23) had a positive history for intake of alcohol and/or drugs. CONCLUSIONS: Acute HEV infection is the leading cause of FHF in Bangladesh. Sewage contamination of the water supply following floods contributes to a higher incidence of HEV infection. HBV infection is also important.Mamun-Al Mahtab Salimur Rahman Mobin Khan Ayub Al Mamun Shahrin Afroz 2008Hepatobiliary & Pancreatic Diseases International2008,7,2:5
3Fas stimulation of T lymphocytes promotes rapid intercellular exchange of death signals via membrane nanotubes显示文摘Fas/CD95 表面受体调停各种各样的房间的快速的死亡打字,包括有为触发 autoimmunity 的潜力的 autoreactive T 房间。这里,我们表明那的船边交货的现在的新奇方面定义一种“社会”的尺寸到导致受体的 apoptosis。船边交货刺激很快导致在附近的 T 房间之间的广泛的膜 nanotube 形成。这极其依赖于 Rho GTPases 然而并非在 caspase 激活上。包括活跃 caspases 的膜和 cytosolic 元素的双向转移能被观察经由这些 nanotubes 发生。Nanotube 形成和死亡信号的细胞间的交换在从有在船边交货受体的自体免疫的 lymphoproliferative 症候群 harbouring 变化的病人的 T 淋巴细胞是有缺点的。我们断定调停 nanotube 的交换组成扩充在附近的 T 房间之间发信号的死亡的繁殖的细胞间的通讯的一种新奇形式。Peter D Arkwright Francesca Luchetti Julien Tour Charlotte Roberts Rahna Ayub Ana P Morales Jose J Rodriguez Andrew Gilmore Barbara Canonico Stefano Papa Mauro Degli Esposti 2010Cell Research2010,20,1:4
4Effect of rare earth and transition metal La-Mn substitution on electrical properties of co-precipitated M-type Ba-ferrites nanoparticles显示文摘In the current research work Ba_(1-x)La)xMn)yFe_(12-y)O_(19) hexa-ferrite nanoparticles of different compositions were synthesized using chemical co-precipitation technique. The structural properties were explored using X-ray diffractions(XRD), scanning electron microscopy(SEM) and Fourier transmission infrared spectroscopy(FTIR). XRD indexed pattern confirms the formation of M-type hexagonal phase. The crystallite size of synthesized samples ranges from 13 to 34 ± 2 nm. FTIR peaks observe also confirmed the presence of metaloxygen bond of the desired product. The position of peak at 467 cm^(-1) corresponds to A_2 u vibration for octahedral Fe(4+)-O and peak position E1 u corresponds to vibration of Fe(3+)O4 octahedral bonds. The band v_1 in range(677-559 cm^(-1)) and v_2 in frequency range(356-419 cm^(-1)) are associated to A and B sites.Dielectric properties of all compositions were measured with frequency. The dielectric constant, loss and tangent loss decrease from 26 to 9, 25 to 2 and 0.94 to 0.14, respectively with frequency. DC electrical resistivity is increased with dopant concentration increasing from 2.15 × 10~4 to 1.92 ×10~5 Ω·cm.Muhammad Ayub Iftikhar Hussain Gul Khalid Nawaz Khurram Yaqoob 2019Journal of Rare Earths2019,37,2:4
5UV Assisted Preliminary DNA Binding Studies and Single-crystal X-ray Structure of 4-{(4-Nitrophenyl-sulfonamido)methyl}cyclohexanecarboxylic Acid显示文摘A new sulfonamide, 4-{(4-nitrophenylsulfonamido)methyl}cyclohexanecarboxylic acid(C14H18N2O6S), has been synthesized by the reaction of tranexamic acid and 4-nitrobenzenesulfonyl chloride in basic medium at room temperature. The molecular structure was determined by FT-IR, NMR, elemental analysis and single-crystal X-ray technique. X-ray diffraction shows that the compound crystallizes in the monoclinic system, space group P21/c with a = 13.5980(7), b = 4.9877(2), c = 23.3878(13) ?, β = 93.254(3)o, Z = 4, V = 1583.67(14) ?3, μ = 0.237 mm-1, F(000) = 720, R = 0.0471 and w R = 0.1182. The molecules are related by inversion and paired into dimers via C–H···O interactions. The dimmers are interlinked due to strong N–H···O bonds, where O-atoms are of sulfonyl groups. The molecules are stabilized in the form of infinite two-dimensional network with base vectors [0 1 0] and [0 0 –1] in the plane(1 0 2). The existence of good intermolecular interactions suggests the biological importance of the synthesized molecule. The compound was screened for its interaction with FS-DNA using UV-visible spectroscopy. UV-visible spectroscopic results depict that the compound interacts with DNA by mixed binding mode intercalation along with hydrogen bonding. Negative values of ΔG(–23.34, –17.79 k J·mol-1) indicate spontaneity of the compound-DNA adduct formation.MUHAMMAD Danish RABIA Ayub Butt MUHAMMAD Nawaz Tahir MUHAMMAD Ashfaq SYEDA Tahira Hafeez 2017Chinese Journal of Structural Chemistry2017,36,5:3
6HBV Induced HCC: Major Risk Factors from Genetic to Molecular Level显示文摘Ambreen Ayub Usman Ali Ashfaq Asma Haque Haruki Komatsu 2013BioMed Research International2013,,:2
7Measurement of Forces and Torques during Non-Homogeneous Material Drilling Operation显示文摘Mohd Hazny Aziz Muhammad Azmi Ayub Roseleena Jaafar 2011Journal of Mechanics Engineering and Automation2011,1,2:2
8Potentially harmful metals,and health risk evaluation in groundwater of Mardan,Pakistan:Application of geostatistical approach and geographic information system显示文摘This study investigates the values of pH,total dissolved solids(TDS),elevation,oxidative reduction potential(ORP),temperature,and depth,while the concentrations of Br,and potentially harmful metals(PHMs)such as Cr,Ni,Cd,Mn,Cu,Pb,Co,Zn,and Fe in the groundwater samples.Moreover,geographic information system(GIS),XLSTAT,and IBM SPSS Statistics 20 software were used for spatial distribution modeling,principal component analysis(PCA),cluster analysis(CA),and Quantile-Quantile(Q-Q)plotting to determine groundwater pollution sources,similarity index,and normal distribution reference line for the selected parameters.The mean values of pH,TDS,elevation,ORP,temperature,depth,and Br were 7.2,322 mg/L,364 m,188 mV,29.6℃,70 m,0.20 mg/L,and PHMs like Cr,Ni,Cd,Mn,Cu,Pb,Co,Zn,and Fe were 0.38,0.26,0.08,0.27,0.36,0.22,0.04,0.43 and 0.86 mg/L,respectively.PHMs including Cr(89%),Cd(43%),Mn(23%),Pb(79%),Co(20%),and Fe(91%)exceeded the guideline values set by the world health organization(WHO).The significant R^(2)values of PCA for selected parameters were also determined(0.62,0.67,0.78,0.73,0.60,0.87,-0.50,0.69,0.70,0.74,-0.50,0.70,0.67,0.79,0.59,and-0.55,respectively).PCA revealed three geochemical processes such as geogenic,anthropogenic,and reducing conditions.The mineral phases of Cd(OH)_(2),Fe(OH)_(3),FeOOH,Mn_(3)O_(4),Fe_(2)O_(3),MnOOH,Pb(OH)_(2),Mn(OH)_(2),MnO_(2),and Zn(OH)_(2)(-3.7,3.75,9.7,-5.8,8.9,-3.6,2.2,-4.6,-7.7,-0.9,and 0.003,respectively)showed super-saturation and under-saturation conditions.Health risk assessment(HRA)values for PHMs were also calculated and the values of hazard quotient(HQ),and hazard indices(HI)for the entire study area were increased in the following order:Cd>Ni>Cu>Pb>Mn>Zn>Cr.Relatively higher HQ and HI values of Ni,Cd,Pb,and Cu were greater than one showing unsuitability of groundwater for domestic,agriculture,and drinking purposes.The long-term ingestion of groundwater could also cause severe health concerns such as kidney,brain dysfunction,liver,stomach problems,and even cancer.Abdur Rashid Muhammad Ayub Asif Javed Sardar Khan Xubo Gao Chengcheng Li Zahid Ullah Tariq Sardar Juma Muhammad Shahla Nazneen 2021Geoscience Frontiers2021,12,3:2
9Assessment of Genetic Variation Within Indian Mustard (Brassica juncea) Germplasm Using Random Amplified Polymorphic DNA Markers显示文摘Genetic diversity among 45 Indian mustard (Brassica juncea L.) genotypes comprising 37 germplasm collections, five advance breeding lines and three improved cultivars was investigated at the DNA level using the random amplified polymorphic DNA (RAPD) technique. Fifteen primers used generated a total of 92 RAPD fragments, of which 81 (88%) were polymorphic. Of these, 13 were unique to accession 'Pak85559'. Each primer produced four to nine amplified products with an average of 6.13 bands per primer. Based on pairwise comparisons of RAPD amplification products, Nei and Li's similarity coefficients were calculated to evaluate the relationships among the accessions. Pairwise similarity indices were higher among the oilseed accessions and cultivars showing narrow ranges of 0.77-0.99. An unweighted pair-group method with arithmetic averages cluster analysis based on these genetic similarities placed most of the collections and oilseed cultivars close to each other, showing a low level of polymorphism between the accessions used. However, the clusters formed by oilseed collections and cultivars were comparatively distinct from that of advanced breeding lines. Genetically, all of the accessions were classified into a few major groups and a number of individual accessions. Advanced breeding lines were relatively divergent from the rest of the accessions and formed independent clusters. Clustering of the accessions did not show any pattern of association between the RAPD markers and the collection sites. A low level of genetic variability of oilseed mustard was attributed to the selection for similar traits and horticultural uses. Perhaps close parentage of these accessions further contributed towards their little diversity. The study demonstrated that RAPD is a simple and fast technique to compare the genetic relationship and pattern of variation among the gene pool of this crop.Muhammad Ayub Khan Malik Ashiq Rabbani Muhammad Munir Saifullah Khan Ajmal Muhammad Azim Malik 2008Journal of Integrative Plant Biology2008,50,4:2
10Non-steroidal anti-inflammatory drugs and risk of neoplastic progression in Barrett’s oesophagus: a prospective study显示文摘Thomas L Vaughan Linda M Dong Patricia L Blount Kamran Ayub Robert D Odze Carissa A Sanchez Peter S Rabinovitch Brian J Reid 2005Lancet Oncology2005,,12:2
11基于金属氢化物高温蓄热的氢热耦合传递机理显示文摘目前大多数可再生能源如太阳能具有间歇性和不稳定性的问题,因此高效蓄热技术成为了发展太阳能的一个关键途径。金属氢化物高温蓄热技术作为热化学蓄热中最有前途的方法之一,受到了人们的广泛关注。为了实现金属氢化物高温蓄热技术的工程应用,明确其氢热耦合传递机理至关重要。本研究采用数值模拟的方法,通过建立反应器的多物理场耦合模型,讨论了不同时刻下床层内部参数的分布,得到了反应锋面的形成和移动机理以及非均匀反应的形成机理;此外,结合反应器内部氢压、接触热阻和床层热阻的变化规律,明确了不同阶段下金属氢化物高温蓄热技术的控制环节;最后,依据金属氢化物高温蓄热技术的工程应用挑战,提出了相应的研究策略。刘洋 Iqra AYUB 杨福胜 吴震 张早校 2021化工学报2021,72,9:2
12Week Ahead Electricity Power and Price Forecasting Using Improved DenseNet-121 Method显示文摘In the Smart Grid(SG)residential environment,consumers change their power consumption routine according to the price and incentives announced by the utility,which causes the prices to deviate from the initial pattern.Thereby,electricity demand and price forecasting play a significant role and can help in terms of reliability and sustainability.Due to the massive amount of data,big data analytics for forecasting becomes a hot topic in the SG domain.In this paper,the changing and non-linearity of consumer consumption pattern complex data is taken as input.To minimize the computational cost and complexity of the data,the average of the feature engineering approaches includes:Recursive Feature Eliminator(RFE),Extreme Gradient Boosting(XGboost),Random Forest(RF),and are upgraded to extract the most relevant and significant features.To this end,we have proposed the DensetNet-121 network and Support Vector Machine(SVM)ensemble with Aquila Optimizer(AO)to ensure adaptability and handle the complexity of data in the classification.Further,the AO method helps to tune the parameters of DensNet(121 layers)and SVM,which achieves less training loss,computational time,minimized overfitting problems and more training/test accuracy.Performance evaluation metrics and statistical analysis validate the proposed model results are better than the benchmark schemes.Our proposed method has achieved a minimal value of the Mean Average Percentage Error(MAPE)rate i.e.,8%by DenseNet-AO and 6%by SVM-AO and the maximum accurateness rate of 92%and 95%,respectively.Muhammad Irfan Ali Raza Faisal Althobiani Nasir Ayub Muhammad Idrees Zain Ali Kashif Rizwan Abdullah Saeed Alwadie Saleh Mohammed Ghonaim Hesham Abdushkour Saifur Rahman Omar Alshorman Samar Alqhtani 2022Computers, Materials & Continua2022,,9:2
13Serum paraoxonase after myocardial infarction显示文摘Ayub A Mackness MI Arrol S 1999ArteriosclerThmmb vasc Biol1999,19,2:1
14Efficacy and safety of total doseinfusion of low molecular weight iron dextran in the treatment ofirondeficiency anemia during pregnancy显示文摘Ayub R Tariq N Adil MM 2008J Coll Physicians SurgPak2008,18,7:1
15Expression of ACC oxi- dase antisense gene inhibits ripening of cantaloupe melon fruits显示文摘Ayub R Guis M Ben Amor M 1996Nature Biotechnology1996,14,:1
16Mechanicalproperties of high-performance concrete reinforced withbasalt fibers显示文摘AYUB T SHAFIQ N NURUDDIN M F 2014Procedia Engineering2014,77,:1
17Serum paraoxonase after myocardial infarction 显示文摘Ayub A Mackness M J Arrol S 1999Arterioscler Thromb Vasc Biol1999,19,1:1
18Organic acids production and phosphate solubilization by phosphate solubilizing microorganisms (PSM) under in vitro conditions 显示文摘Rashid M Khalil S Ayub N 2004Pak J Biol Sci2004,7,2:1
19Endoscopic retrograde cholangiopancreatography in gallstone-associated acute pancreatitis显示文摘Ayub K Imada R Slavin J 2004Cochrane Database Syst Rev2004,18,00:1
20Physico-chemical and rheological characterization of poly-gamma-glutamic acid produced by a new strain of Bacillus subtilis显示文摘Alessandra de Cesaro Suse Botelho da Silva Vanessa Zimmer da Silva Marco Ant?nio Záchia Ayub 2014European Polymer Journal2014,,:1
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