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Synthesis, Crystal Structure, Cytotoxic, Antileishmanial and Docking Evaluation of 3-(4-Chloro-3-nitrophenyl)-1-phenylprop-2-en-1-one

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Chinese Journal of Structural Chemistry 2018年第8期37卷 1250-1258页

作者： HAMID Aziz AAMER Saeed FARUKH Jabeen ulRICH Florke qurat-ul-ain NADHMAN Akhter Department of Chemistry Quaid-I-Azam University Islamabad 45320 Pakistan Cardiovascular and Metabolic Research Unit Laurentian University 935 Ramsey Lake Road Sudbury ON Canada P3E 2C6 Department Chemie Fakultatfur Naturwissenschafien Universitat Paderborn Warburgerstrαβe 100 33098 Paderborn Germany Center for Interdisciplinary Research in Basic Sciences IIU Islamabad Pakistan

Chalcone derivatives are of immense importance owing to their superior pharmacological profile. Minor changes in their structures create high degree of diversity that results in a broader spectrum of biological activities. The present research paper presents the synthesis of 3-（4-chloro-3-nitrophenyl）-1-phenylprop-2-en-1-one chalcone（I）, single crystal XRD analysis and the evaluation of its possible biological activities like cytotoxic（LD（50） = 5.40 ug/m L）and antileishmanial（LD（50） = 0.81 ug/m L） activities. The results indicate the tested chalcone（I）shows superior inhibition values against leishmanial promastigotes. Further, the possible interaction sites of chalcone（I） with Try R enzyme involved in the redox metabolism of the leishmanial parasite were determined using docking simulation technique. Docking computations demonstrate that the compound establishes prominent binding interactions with the key residues of Try R and possesses the potential to effectively inhibit the catalytic activities of enzyme. Thus the results suggest that the chalcone（I） can serve as a potential scaffold for the treatment of leishmaniasis and deserve further development.

关键词： chalcone cytotoxicity antfleishmanial Claisen-Schmidt condensation moleculardocking

Canted antiferromagnetic and optical properties of nanostructures of Mn_2O_3 prepared by hydrothermal synthesis

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Chinese Physics B 2012年第11期21卷 441-447页

作者： qurat-ul-ain Javed Wang Feng-Ping M.Yasir Rafique Arbab Mohammad toufiq M.Zubair Iqbal Department of Physics School of Mathematics and PhysicsUniversity of Science and Technology Beijing

We have reported new magnetic and optical properties of Mn2O3 nanostructures. The nanostructures have been synthesized by the hydrothermal method combined with the adjustment of pH values in the reaction system. The particular characteristics of the nanostructures have been analyzed by employing X-Ray diffraction （XRD）, scanning electron microscopy （SEM）, energy dispersive X-ray （EDX） analysis, transmission electron microscopy （TEM）, high resolution transmission electron microscopy （HRTEM）, Raman spectroscopy （RS）, UV-visible spectroscopy, and the vibrating sample magnetometer （VSM）. Structural investigation manifests that the synthesized Mn2O3 nanostructures are orthorhombic crystal. Magnetic investigation indicates that the Mn2O3 nanostructures are antiferromagnetic and the antiferromagnetic transition temperature is at TN = 83 K. Furthermore, the Mn2O3 nanostructures possess canted antiferromagnetic order below the Neel temperature due to spin frustration, resulting in hysteresis with large coercivity （1580 Oe） and remnant magnetization （1.52 emu/g）. The UV-visible spectrophotometry was used to determine the transmittance behaviour of Mn203 nanostructures. A direct optical band gap of 1.2 eV was acquired by using the Davis-Mott model. The UV-visible spectrum indicates that the absorption is prominent in the visible region, and transparency is more than 80% in the UV region.

关键词： Mn2O3 orthorhombic nanocrystals UV transparency canted antiferromagnetic property

Female directors in the boardroom and intellectual capital performance:Does the“critical mass”matter?

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Financial Innovation 2023年第1期9卷 1995-2018页

作者： Hafiz Mustansar Javaid qurat ul ain Rita D’Ecclesia Department of Social and Economic Sciences Sapienza Universitàdi RomaRomeItaly Dipartimento di Scienze Aziendali‑Management&Innovation Systems/DISA‑MIS University of SalernoSalernoItaly School of Economics and Finance Xi’an Jiaotong UniversityXi’anChina

This research aims to investigate the influence of female directors on Intellectual Capital Performance(ICP)using a sample of manufacturing-listed companies in *** study investigates the link between having two or more female directors and the Modified Value-Added Intellectual Coefficient(MVAIC)methodology,employing the critical mass theory from 2004–*** find that having a critical mass of female directors(three or more)shows a significant positive impact on MVAIC and its components,including human capital efficiency,structural capital efficiency,relational capital efficiency,and physical capital efficiency,with physical capital being the critical *** study reveals that the critical mass participation of female directors substantially influences the IC efficiency of privately owned companies compared to state-owned ***,the number of female directors also affects the IC performance of manufacturing companies in multiple *** findings support the validity of group classification identified by Kanter and Critical Mass *** the best of our knowledge,this is one of the few pieces of research that studies the role of female board directors in IC performance and Chinese manufacturing firms using MVAIC as an IC measure.

关键词： Corporate governance Female directors Critical mass Intellectual capital State-owned enterprises(SOEs) China

Pre-oxidative catalytic treatment of toluidine blue with potassium permanganate in acidic solution

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中国化学前沿:英文版 2011年第2期6卷 84-90页

作者： Rafia AZMAT Faryal Vali MOHAMMED Tehseen AHMED qurat-ul-ain TANWIR Department of Chemistry University of KarachiKarachi 75270Pakistan International Chemical and Biological Sciences Center H.E.J Reaseach Institute of ChemistryUniversity of KarachiKarachi 75270Pakistan Department of Chemistry Jinnah University for WomenKarachi 74600Pakistan

This article describes the potential of KMnO4 for oxidation of the thiazine dye(Toluidine blue TB)in an acidic *** effect of different operational parameters like initial concentration of dye,potassium permanganate,pH,ionic strength,catalyst,acids and temperature were investigated spectrophotometrically at λ_(max)=613 *** results showed a complete removal of the TB with mineralization of the dye *** and complete decoloration was observed in the presence of monobasic acid(HCl)as compared to the H_(2)SO_(4) where little color removal was *** was found to be an effective catalyst in oxidation for complete and fast decolorization with *** significant change at elevated temperatures showed that an intermediate complex degraded with slight change in the ***/visible spectrophotometry and GC mass analysis showed an intermediate activated complex demethylated sulophooxide of TB which later on degraded into smaller fragments.

关键词： oxidation TB potassium permanganate decoloration Pb

Apparent variations in nitrogen runoff and its uptake in paddy rice under straw incorporation

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Journal of Integrative Agriculture 2022年第11期21卷 3356-3367页

作者： Muhammad Amjad BASHIR ZHAI Li-mei WANG Hong-yuan LIU Jian qurat-ul-ain RAZA GENG Yu-cong Abdur REHIM LIU Hong-bin Key Laboratory of Nonpoint Source Pollution Control Ministry of AgricultureInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081P.R.China College of Agriculture Bahauddin Zakariya University Bahadur Sub-CampusLayyah31200MultanPakistan School of Environment and Sustainability University of SaskatchewanSaskatoonSK S7N 3H5 Canada Department of Soil Science Faculty of Agricultural Sciences and TechnologyBahauddin Zakariya UniversityMultan 60800Pakistan

Straw incorporation is a widespread practice to promote agricultural ***,the potential effects of straw incorporation with the prolonged time on nitrogen(N)runoff loss from paddy fields are not well *** current study addresses the knowledge gap by assessing the effects of straw incorporation on the processes influencing N runoff patterns and its impacts on crop yield,N uptake,total N(TN),and soil organic matter(SOM).We conducted field experiments with rice(Oryza sativa L.)–wheat(Triticum aestivum L.)rotation,rice–tobacco(Nicotiana tabacum L.)rotation,and double-rice cropping in subtropical China from 2008 to *** rotation had three N treatments:zero N fertilization(CK),chemical N fertilization(CF),and chemical N fertilization combined with straw incorporation(CFS).The treatment effects were assessed on TN runoff loss,crop yield,N uptake,soil TN stock,and *** showed that TN runoff was reduced by substituting part of the chemical N fertilizer with straw N in the double rice rotation,while crop N uptake was significantly(P<0.05)decreased due to the lower bioavailability of straw *** contrast,in both rice–wheat and rice–tobacco rotations,TN runoff in CFS was increased by 0.9–20.2%in the short term when straw N was applied in addition to chemical N,compared to ***,TN runoff was reduced by 2.3–19.3%after three years of straw incorporation,suggesting the long-term benefits of straw incorporation on TN loss ***,crop N uptake was increased by 0.8–37.3%in the CFS of both *** study demonstrates the challenges in reducing N runoff loss while improving soil fertility by straw incorporation over the short term but highlights the potential of long-term straw incorporation to reduce N loss and improve soil productivity.

关键词： straw return nitrogen runoff water pollution rice yield nitrogen uptake

Anomalous Situations Recognition in Surveillance Images Using Deep Learning

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Computers, Materials & Continua 2023年第7期76卷 1103-1125页

作者： qurat-ul-ain Arshad Mudassar Raza Wazir Zada Khan Ayesha Siddiqa Abdul Muiz Muhammad Attique Khan Usman Tariq Taerang Kim Jae-Hyuk Cha Department of Computer Science COMSATS University IslamabadWah Campus47040Pakistan Deptartment of Computer Science University of WahWah Cantt47040Pakistan Deptartment of Computer Science HITEC UniversityTaxila47080Pakistan Management Information System Department College of Business AdministrationPrince Sattam Bin Abdulaziz UniversityAl-Kharj 16278Saudi Arabia Department of Computer Science Hanyang UniversitySeoul04763Korea

Anomalous situations in surveillance videos or images that may result in security issues,such as disasters,accidents,crime,violence,or terrorism,can be identified through video anomaly ***,differentiat-ing anomalous situations from normal can be challenging due to variations in human activity in complex environments such as train stations,busy sporting fields,airports,shopping areas,military bases,care centers,*** learning models’learning capability is leveraged to identify abnormal situations with improved *** work proposes a deep learning architecture called Anomalous Situation Recognition Network(ASRNet)for deep feature extraction to improve the detection accuracy of various anomalous image *** proposed framework has five *** the first step,pretraining of the proposed architecture is performed on the CIFAR-100 *** the second step,the proposed pre-trained model and Inception V3 architecture are used for feature extraction by utilizing the suspicious activity recognition *** the third step,serial feature fusion is performed,and then the Dragonfly algorithm is utilized for feature optimization in the fourth ***,using optimized features,various Support Vector Machine(SVM)and K-Nearest Neighbor(KNN)based classification models are utilized to detect anomalous *** proposed framework is validated on the suspicious activity dataset by varying the number of optimized features from 100 to *** results show that the proposed method is effective in detecting anomalous situations and achieves the highest accuracy of 99.24%using cubic SVM.

关键词： Anomaly detection anomalous events anomalous behavior anomalous objects violence detection deep learning

Growth of monodisperse nanospheres of MnFe_2O_4 with enhanced magnetic and optical properties

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Chinese Physics B 2013年第10期22卷 453-459页

作者： M.Yasir Rafique 潘礼庆 qurat-ul-ain Javed M.Zubair Iqbal 邱红梅 M.Hassan Farooq 郭振刚 M.Tanveer College of Science and Research Institute for New Energy China Three Gorges University Department of Physics University of Science and Technology of Beijing School of Material Science and Engineering University of Science and Technology of Beijing Research Center of Materials Science Beijing Institute of Technology

Highly dispersive nanospheres of MnFe204 are prepared by template free hydrothermal method. The nanospheres have 47.3-nm average diameter, narrow size distribution, and good crystallinity with average crystallite size about 22 nm. The reaction temperature strongly affects the morphology, and high temperature is found to be responsible for growth of uniform nanospheres. Raman spectroscopy reveals high purity of prepared nanospheres. High saturation magnetization （78.3 emu/g）, low coercivity （45 Oe, 10e = 79.5775 ***-1）, low remanence （5.32 emu/g）, and high anisotropy constant 2.84 × 10^4 J/m3 （10 times larger than bulk） are observed at room temperatures. The nearly snperparamagnetic behavior is ~ spin due to comparable size of nanospheres with superparamagnetic critical thameter Dcr spm The high value of Keff may be due to coupling between the pinned moment in the amorphous shell and the magnetic moment in the core of the nanospheres. The nanospheres show prominent optical absorption in the visible region, and the indirect band gap is estimated to be 0.98 eV from the transmission spectrum. The prepared Mn ferrite has potential applications in biomedicine and photocatalysis.

关键词： Mn ferrite magnetic materials hydrothermal method superparamagnetic Raman spectroscopy

Assessment of Nutrient Leaching Losses and Crop Uptake with Organic Fertilization,Water Saving Practices and Reduced Inorganic Fertilizer

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Phyton-International Journal of Experimental Botany 2023年第5期92卷 1555-1570页

作者： Xiaotong Liu Muhammad Amjad Bashir Yucong Geng qurat-ul-ain Raza Abdur Rehim Muhammad Aon Jianhang Luo Ying Zhao Xuejun Zhang Hongbin Liu Institute of Agricultural Resources and Environment Ningxia Academy of Agriculture and Forestry SciencesYinchuan750002China Faculty of Agricultural Sciences and Technology Bahauddin Zakariya UniversityMultan60800Pakistan College of Agriculture University of LayyahLayyah31200Pakistan Key Laboratory of Nonpoint Source Pollution Control Ministry of AgricultureInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences(CAAS)Beijing100081China

The increasing world population has forced excessive chemical fertilizer and irrigation to complete the global food demand,deteriorating the water quality and nutrient ***-term studies do not compile the evidences;therefore,the study aimed to identify the effectiveness of reduced doses of inorganic fertilizer and water-saving practices,hence,a six-year experiment(2015-2020)was conducted in China to address the knowledge *** experimental treatments were:farmer accustomed fertilization used as control(525:180:30 kg NPK ha^(-1)),fertilizer decrement(450:150:15 kg NPK ha^(-1)),fertilizer decrement+water-saving irrigation(450:150:15 kg NPK ha^(-1)),application of organic and inorganic fertilizer+water-saving irrigation(375:120:0 kg NPK ha^(-1)+4.5 tones organic fertilizer ha^(-1)),and application of controlled-release fertilizer(80:120:15 kg NPK ha^(-1)).Each treatment was replicated thrice following a randomized complete block *** results achieved herein showed that control has the highest losses in the six-year study for total nitrogen(225.97 mg L^(-1)),total soluble nitrogen(121.58 mg L^(-1)),nitrate nitrogen(0.93 mg L^(-1)),total phosphorus(0.57 mg L^(-1)),and total soluble phosphorus(0.57 mg L^(-1))*** fertilizer and water application improved crop nutrient uptake,nitrogen concentration was significantly enhanced with organic and inorganic fertilizer+water-saving irrigation,P concentration was increased with fertilizer decrement+water-saving irrigation,and K concentration was improved with fertilizer decrement+water-saving ***,this study concludes that reduced inorganic fertilizer dose combined with water-saving practices is significantly helpful in reducing nutrient leaching losses and improving nutrient uptake and water *** studies are needed to explore the impacts of reduced fertilization and water-saving irrigation on leaching *** benefits at different climatic conditions,soil types,and ferti

关键词： Corn production feeding system water consumption efficiency sustainable agriculture water use

上市公司股息政策的财务决定因素——来自巴基斯坦的经验证据

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上市公司股息政策的财务决定因素——来自巴基斯坦的经验证据

作者： qurat ul ain 四川农业大学

学位级别：硕士

股利支付是公司财务的一个核心问题,因为它对公司的投资和融资决策有重大影响。股利支付影响企业的资本结构和投资决策。这个问题被称为“股利之谜”,因为存在各种对立的理论解释。尽管学者们一直在研究影响股息支付的金融因素,但证据... 详细信息

股利支付是公司财务的一个核心问题,因为它对公司的投资和融资决策有重大影响。股利支付影响企业的资本结构和投资决策。这个问题被称为“股利之谜”,因为存在各种对立的理论解释。尽管学者们一直在研究影响股息支付的金融因素,但证据仍然不确定,这些研究大多是在发达国家的背景下进行的。此外,家族企业和国有企业对企业股利分配的决定因素以及股一一直没有得到足够的重视。巴基斯坦的经济和资本市场有几个独特的特点,这使得本文调查影响巴基斯坦上市公司的因素。由于巴基斯坦公司治理薄弱,大多数公司的所有权结构由一个主要所有者控制。其次,巴基斯坦的红利支付是自愿的,不像一些发达国家那样是政府强制的。第三,税收环境与发达经济体不同。然而在巴基斯坦,没有资本利得税,股息收入征收10%的预扣税。本研究探讨了在巴基斯坦证券交易所上市的家族和国有企业股利支付的决定因素。它还调查了家庭企业和国有企业股利支付的决定因素是否不同。本研究使用了2010年至2019年10年期间在巴基斯坦证券交易所交易的所有非金融公司(390家)的面板数据。普通最小二乘法来分析显著影响股利支付的因。本研究调查了盈利能力、公司规模、财务杠杆、流动性的影响。本研究使用Stata SE 15软件进行统计和计量分析。综合统计的结果显示,家族企业股利支付的均值为1.65,大于国有企业股利支付的均值(0.24)。这意味着,平均而言,家族企业比国有企业支付更多的股息。家族企业的平均盈利能力也更高,这意味着平均而言,家族企业比国有企业更有利可图。实证结果表明,企业规模显着影响家族企业的股息支付。对于国有企业,盈利能力、流动性和企业规模是股息支付的主要决定因素。本研究为发展中经济体特别是巴基斯坦的投资者和决策者提供了有价值的启示。建议政策制定者和立法者制定政策,以保护小股东的权利。建议政策制定者限制企业(特别是家族企业和国有企业)向投资者支付最低限度的股息。此外,建议那些想要股利分配率的投资者应该投资于巴基斯坦的家族企业。

关键词：股利政策国有企业家族企业代理理论