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Assessment of phytotoxic, genotoxic and enzyme inhibition potential of Sterculia diversifolia

Journal of Traditional Chinese Medicine 2022年第4期42卷 595-603页

作者： Fazle Rabbi amir zada Amna Nisar Department of Pharmacy University of PeshawarPeshawar 25120Khyber PakhtunkhwaPakistan Department of Pharmacy Abasyn University PeshawarPeshawar25000Khyber PakhtunkhwaPakistan.fazle.rabbi@abasyn.edu.pk Telephone:+92-0314-9244566

OBJECTIVE:To evaluate Sterculia diversifolia stem bark and leaves for phytotoxic,genotoxic and enzymes inhibition ***:Phytotoxic activity of both stem bark and leaves were screened using Lemna *** genotoxic activity of Sterculia diversifolia stem bark and leaves extracts were tested using comet assay protocol while enzyme inhibition activity of crude extract and various fractions of both stem bark and leaves were evaluated using acetyl cholinesterase,lipoxygenase,β-glucuronidase,urease,xanthine oxidase and carbonic ***:Phytotoxic activity showed significant results in dose dependant manner in both stem bark(ethyl acetate and n-butanol)and leaves(ethyl acetate,nbutanol and n-hexane)*** genotoxic activity,dichloromethane fraction showed significant activity followed by ethyl acetate *** cholinesterease inhibitory activity showed significant results in both stem bark and leaves fractions,while significant lipoxygenase inhibition was shown by ethyl acetate,dichloromethane,crude extract and n-hexane fractions of both stem bark and leaves.β-glucuronidase,urease and carbonic anhydrase inhibitory activity showed highly significant results in ethyl acetate fraction of both stem bark and leaves,while xanthine oxidase inhibition was shown by dichloromethane fraction of stem bark and leaves ***:This study emphasizes the important phytotoxic,genotoxic and enzyme inhibition effects of Sterculia diversifolia stem bark and ***,it is clear that Sterculia diversifolia stem bark and leaves possess phytotoxic,genotoxic and enzyme inhibitory agents.

关键词： Sterculia plant extracts phytotoxic mutagenicity tests enzymes

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Detailed approach toward the anti-hyperglycemic potential of Sterculia diversifolia *** against alloxan-induced in vivo hyperglycemia model

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Journal of Traditional Chinese Medicine 2022年第1期42卷 17-22页

作者： Fazle Rabbi amir zada Amna Nisar Achyut Adhikari Irfan Ullah Shafiq Ur Rahman Department of Pharmacy Abasyn University PeshawarPeshawar 25000Khyber PakhtunkhwaPakistan Department of Pharmacy University of PeshawarPeshawar 25120Khyber PakhtunkhwaPakistan Central Department of Chemistry Tribhuvan UniversityKritipur 44613KathmanduNepal Department of Pharmacy Sarhad University of Science and Information TechnologyPeshawar25000Khyber PakhtunkhwaPakistan Department of Pharmacy Shaheed Benazir Bhutto UniversitySheringalDir(Upper)18000Khyber PakhtunkhwaPakistan

OBJECTIVE:To investigate Sterculia diversifolia *** for potential anti-diabetic activity in the in vivo mouse model of alloxan-induced ***:Sterculia diversifolia(***)was subjected to extraction and isolation techniques and structural characterization of the isolated compounds were performed using spectroscopic *** acute toxicity test was performed by orally administering *** in doses of 500-2000 mg/*** the assessment of anti-hyperglycemic activity,*** bark and leaves extracts were administered orally in doses of 50,100,and 200 mg/kg,along with metformin(150 mg/kg,i.p)as positive control,after confirmation of alloxan(150 mg/kg,i.p.)induced hyperglycemia in BALB/c *** biochemical parameters were monitored for the period of ***:The phytochemical studies showed the presence of quercetin and kaempferol in *** IC50 values in the in vivo acute toxicity study revealed the safety margin of *** bark(1166.66 mg/kg)and leaves(683.34 mg/kg)extracts.A significant attenuation of alloxan induced hyperglycemia was produced by *** extracts at 50 mg/kg(P<0.05),100 mg/kg(P<0.05,<0.01),and 150 mg/kg(P<0.05,<0.01,<0.001)during 1-4 h,which was comparable to metformin(P<0.001).Significant(P<0.001)improvement appeared in blood hemoglobin,protein,cholesterol,triglycerides,urea,creatinine,HDL,and LDL of the stem bark and leaves extracts treated diabetic ***:These findings connote the usefulness of *** as an anti-diabetic in traditional medicine and this might be attributed to the presence of quercetin and kaempferol,among other phytochemicals.

关键词： Sterculia hypoglycemic agents quercetin Kaempferols biochemical parameters

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Facile synthesis of hierarchical NiO/NiFe_(2)O_(4) microsphere composite as efficient visible photocatalyst for 2,4-DCP degradation

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Rare Metals 2024年第4期43卷 1580-1588页

作者： Shabana Shaheen Shuai Xu Ji Bian amir zada Zi-Qing Zhang Yang Qu Li-Qiang Jing Key Laboratory of Functional Inorganic Materials Chemistry(Ministry of Education) International Joint Research Center and Lab for Catalytic TechnologySchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin150080China Department of Chemistry Abdul Wali Khan UniversityMardan23200Pakistan

It is highly desired to develop efficient photocatalysts with recycling property for practical application to degrade toxic ***,nanosheet-assembled NiFe_(2)O_(4)microspheres with commendable activity are successfully synthesized by a facile solvothermal reaction with NH4F as the modifier,and their photoactivities are further improved by coupling with NiO through an in situ growth *** optimized nickel oxide(NiO)/nickel ferrite(NiFe_(2)O_(4))microsphere composite(5NiO/NFO-4)exhibits a satisfactory photocatalytic activity for 2,4-dichlorophenol(2,4-DCP)degradation under visible-light irradiation,which is attributed to its wide visible-light response,well-designed hierarchical structure and enhanced charge transfer and separation by coupling NiO as a high-level energy platform to accept ***,it is found that the NiO/NiFe_(2)O_(4)microsphere photocatalysts can be easily collected and recycled owing to the distinctive magnetic *** work provides a feasible route to rational design visible-light-driven photocatalysts with high-activity for environmental remediation and purification with good recyclability.

关键词： NiFe_(2)O_(4) microspheres NiO/Fe_(2)O_(4) composite Charge separation Visible-light photocatalysis 2 4-Dichlorophenol degradation

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In vivo laxative, anti-diarrheal, hepatoprotective and diuretic investigations of Sterculia diversifolia and its isolated compounds

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Journal of Traditional Chinese Medicine 2021年第5期41卷 717-724页

作者： Fazle Rabbi amir zada Amna Nisar Muhammad Sohail Saifullah Khan Khalil Abid Ali Ahmad Department of Pharmacy Abasyn University PeshawarPeshawar 25000Khyber PakhtunkhwaPakistan Department of Pharmacy University of PeshawarPeshawar 25120Khyber PakhtunkhwaPakistan School of Pharmacy Yantai UniversityYantai 264003ShandongChina

OBJECTIVE:To investigated the laxative,anti-diarrheal,hepatoprotective and diuretic activity of Sterculia diversifolia and its isolated ***:The laxative activity was studied by counting wet stools while anti-diarrheal activity was performed by measuring gastrointestinal tract *** activity was studied by biochemical and histo-pathological analysis while diuretic activity was performed by urine collection ***:Doses of 30 and 100 mg/kg of crude methanolic extract of Sterculia diversifolia(MESD)stem bark and leaves,significantly(P<0.05,P<0.01)produced wet feces in subjects pretreated with atropine while 8-hydroxyquercetin and dihydroquercetin showed highly significant(P<0.001)results by increasing fecal weight and water contents without producing *** stem bark and leaves also dose-dependently lowered diar-rhea while 8-hydroxyquercetin and dihydroquercetin showed highly significant(P<0.001)results by producing shaped stools in ***,8-hydroxyquercetin and dihydroquercetin offered significant protection against histopathological changes in the *** activity of Crude MESD stem bark and leaves extracts shows highly significant diuretic effect while dihydroquercetin showed better results than ***:It is concluded that Sterculia diversifolia and its isolated compounds bears laxative,anti-diarrheal,hepatoprotective and diuretic effects.

关键词： Sterculia laxatives diuretics 8-hydroxyquercetin dihydroquercetin

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Recent Development in Defects Engineered Photocatalysts:An Overview of the Experimental and Theoretical Strategies

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Energy & Environmental Materials 2022年第1期5卷 68-114页

作者： Zaiba Zafar Shasha Yi Jinpeng Li Chuanqi Li Yongfa Zhu amir zada Weijing Yao Zhongyi Liu Xinzheng Yue College of Chemistry School of Material Science and EngineeringZhengzhou UniversityZhengzhou 450001China Department of Chemistry Tsinghua UniversityBeijing 100084China Department of Chemistry Abdul Wali Khan University MardanMardan 23200Pakistan

Recently,defect architectured photocatalysis is proved to be the most versatile choice for high solar to chemical energy conversion *** engineering strategies are of great demand to effectively tune the electronic microstructure and surface morphologies of semiconductors to boost charge carrier concentration and extend light harvesting *** review provides a comprehensive insight to various kinds of defects along with their synthesis procedures and controlling mechanism to uplift photocatalytic *** addition,the contribution made by defects and material optimization techniques toward electronic band structure of the photocatalyst,the optimal concentration of defects,the key adsorption processes,charge distribution,and transfer dynamics have been explained in ***,to clarify the relationship between photocatalytic activity and defect states in real,a comprehensive outlook to the versatile photocatalytic applications has been presented to highlight current challenges and future *** engineering therefore stands as the next step toward advancement in the design and configuration of modern photocatalysts for high efficiency photocatalysis.

关键词： defect engineering electronic structure photocatalysis vacancies

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FeNi@CNS nanocomposite as an efficient electrochemical catalyst for N_(2)-to-NH_(3) conversion under ambient conditions

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Journal of Materials Science & Technology 2022年第8期103卷 59-66页

作者： Tayiba Ilyas Fazal Raziq Nasir Ilyas Liuxin Yang Sharafat Ali amir zada Syedul Hasnain Bakhtiar Yong Wang Huahai Shen Liang Qiao School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 10084China Department of Chemistry Abdul Wali Khan University of MardanMardanKPK 23200Pakistan Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute of Nuclear Physics and Chemistry Chinese Academy of Engineering PhysicsMianyang 621900China

The electrocatalytic nitrogen reduction reaction(NRR)has emerged as a promising renewable energy source and a feasible strategy as an alternative to Haber-Bosch ammonia(NH_(3))***,finding an efficient and cost-effective robust catalyst to activate and cleave the extremely strong triple bond in nitrogen(N_(2))for electrocatalytic NRR is still a ***,a FeNi@CNS nanocomposite as an efficient catalyst for N_(2) fixation under ambient conditions is *** FeNi@CNS nanocomposite was prepared by a simple water bath process and *** FeNi@CNS is demonstrated to be a highly efficient NRR catalyst,which exhibits better NRR performance with exceptional Faradaic efficiency of 9.83%and an NH_(3) yield of 16.52μg h^(−1) cm^(−2) in 0.1 M Na_(2)SO_(4) aqueous ***,high stability and reproducibility with consecutive 6 cycles for two hours are also demonstrated throughout the NRR electrocatalytic process for 12 ***,the FeNi@CNS catalyst encourages N_(2) adsorption and activation as well as effectively suppressing competitive ***,this earth-abundant FeNi@CNS catalyst with a subtle balance of activity and stability has excellent potential in NRR industrial applications.

关键词： Electrocatalytic nitrogen reduction Transition-metal alloy FeNi@CNS catalyst N_(2)fixation to NH_(3)

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Non-covalent interaction of atomically dispersed dual-site catalysts featuring Co and Ni nascent pair sites for efficient electrocatalytic overall water splitting

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Journal of Materials Science & Technology 2024年第11期178卷 210-225页

作者： Imran Khan Yaogang Chen Zhiyang Li Wenjie Liu Salman Khan Sami Ullah Linlin Liu amir zada Sharafat Ali Shabana Shaheen Lei Yang State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen 518055China School of Physics and Electronics Central South UniversityChangsha 410083China CNAS Accredited Test Center Guangdong Engineering Technology Research Center of Air PurificationHealthlead Co.Ltd.Shenzhen 518055China Key laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of ChinaHeilongjiang UniversityHarbin 150080China K.A.CARE Energy Research&Innovation Center(ERIC) King Fahd University of Petroleum&Minerals(KFUPM)Dhahran 31261Saudi Arabia Department of Chemistry Abdul Wali Khan UniversityMardanKhyber Pakhtunkhwa 23200Pakistan School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

The scarcity of highly effective and economical catalysts is a major impediment to the widespread adop-tion of electrochemical water splitting for the generation of ***_(2),a low-cost candidate,suffers from inefficient catalytic ***,a captivating strategy has emerged,which involves the en-gineering of heteroatom doping to enhance electrochemical *** investigation demonstrates a successful implementation of the strategy by combining ultrathin MoS_(2) nanosheets with Co and Ni dual single multi-atoms(DSMAs)grown directly on 2D N-doped carbon nanosheets(CoNi-MoS_(2)/NCNs)for the purpose of improving hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).With the aid of a dual-atom doped bifunctional electrocatalyst,effective water splitting has been achieved across a broad pH range in *** double doping of Co and Ni strengthens their interactions,thereby altering the electromagnetic composition of the host MoS_(2) and ultimately leading to improved electrocat-alytic ***,the synergistic effect between NCNs and MoS_(2) nanosheets provided efficient electron transport channels for ions and an ample surface area with open voids for ion ***-sequently,the CoNi-MoS_(2)/NCNs catalysts demonstrated exceptional stability and activity,producing low degree overpotentials of 180.5,124.9,and 196.4 mV for HER and 200,203,and 207 mV for OER in neu-tral,alkaline,and acidic mediums,respectively,while also exhibiting outstanding overall water-splitting performance,durability,and stability when used as an electrolyzer at universal pH.

关键词： Multifunctional catalyst Water splitting Functionalized carbon nanosheets Interface engineering pH-universal electrocatalysis

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Synthesis of TiO_2/g-C_3N_4 nanocomposites with phosphate–oxygen functional bridges for improved photocatalytic activity

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Chinese Journal of Catalysis 2017年第6期38卷 1072-1078页

作者： Chong Liu Fazal Raziq Zhijun Li Yang Qu amir zada Liqiang Jing Key Laboratory of Functional Inorganic Materials Chemistry Heilongjiang University Harbin 150080 Heilongjiang China College of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin 150027 Heilongjiang China

One of the most general methods to enhance the separation of photogenerated carriers for g‐C3N4is to construct a suitable heterojunctional composite,according to the principle of matching energy *** interface contact in the fabricated nanocomposite greatly influences the charge transfer and separation so as to determine the final photocatalytic ***,the role of interface contact is often neglected,and is rarely reported to ***,it is possible to further enhance the photocatalytic activity of g‐C3N4‐based nanocomposite by improving the interfacial ***,phosphate-oxygen(P-O)bridged TiO2/g‐C3N4nanocomposites were successfully synthesized using a simple wet chemical method,and the effects of the P-O functional bridges on the photogenerated charge separation and photocatalytic activity for pollutant degradation and CO2reduction were *** photocatalytic activity of g‐C3N4was greatly improved upon coupling with an appropriate amount of nanocrystalline TiO2,especially with P-O bridged ***‐controlled steady‐state surface photovoltage spectroscopy and photoluminescence spectroscopy analyses revealed clearly the enhancement of photogenerated charge separation of g‐C3N4upon coupling with the P-O bridged TiO2,resulting from the built P-O bridges between TiO2and g‐C3N4so as to promote effective transfer of excited electrons from g‐C3N4to *** enhancement was responsible for the improved photoactivity of the P-O bridged TiO2/g‐C3N4nanocomposite,which exhibited three‐time photocatalytic activity enhancement for2,4‐dichlorophenol degradation and CO2reduction compared with bare g‐***,radical‐trapping experiments revealed that the·OH species formed as hole‐modulated direct intermediates dominated the photocatalytic degradation of2,4‐*** work provides a feasible strategy for the design and synthesis of high‐performance g‐C3N4‐based nanocomposite photocatalysts for pollutant degradation and

关键词： TiO2/graphitic carbon nitride nanocomposite Phosphate–oxygen bridge Charge transfer and separation Photocatalysis Carbon dioxide conversion

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Suitable energy platform significantly improves charge separation of g-C3N4 for CO2 reduction and pollutant oxidation under visible-light

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Progress in Natural Science:Materials International 2019年第2期29卷 138-144页

作者： amir zada Nauman Ali Fazle Subhan Natasha Anwar Muhammad Ishaq Ali Shah Muhammad Ateeq Zahid Hussain Khair Zaman Momin Khan Department of Chemistry Abdul Wali Khan University Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University) Ministry of Education School of Chemistry and Materials Science International Joint Research Center for Catalytic Technology Institute of Chemical Sciences University of Peshawar

The photocatalytic activities of g-C3N4can be significantly improved by increasing life time of the photogenerated charges. Here, in this work we introduced TiO2as proper energy platform to accept the photogenerated electrons from g-C3N4during photocatalysis. The nanophotocatalysts formed from the combination of a suitable amount of TiO2nanoparticles and g-C3N4nanosheets showed 8.75 and 4.22% enhancement in photocatalytic activities for CO2reduction and 2-chlorophenol(2-CP) degradation under visible light illumination as compared to bare g-C3N4. Based on the surface photovoltage spectra, photoluminescence spectra and examination of formed hydroxyl radicals, it was confirmed that these enhanced photoactivities were attributed to the much-improved charge separation via the electron transfer from g-C3N4to TiO2. From trapping experiments,it was found that hydroxyl radicals were the major species involved in the photocatalytic degradation of *** study is helpful to synthesize efficient photocatalysts to cope with energy and environmental issues.

关键词： Nanophotocatalyst Charge separation CO2 reduction Pollutant degradation

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Comparative study of metal oxides and phosphate modification with different mechanisms over g-C_(3)N_(4) for visible-light photocatalytic degradation of metribuzin

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Rare Metals 2022年第1期41卷 155-165页

作者： Rui Yan amir zada Lei Sun Zhi-Jun Li Zhi-Yuan Mu Shuang-Ying Chen Fan Yang Jian-Hui Sun Lin-Lu Bai Yang Qu Li-Qiang Jing Key Laboratory of Functional Inorganic Materials Chemistry School of Chemistry and Material SciencesHeilongjiang UniversityHarbin 150080China Key Laboratory of Photochemical Biomaterials and Energy Storage Materials College of Chemistry and Chemical EngineeringHarbin Normal University A.zada Department of Chemistry Abdul Wali Khan University MardanMardan 23200Pakistan

In this work,a comparative study of three frequently employed modification techniques to g-C_(3)N_(4)(CN)nanosheets for the photocatalytic degradation of metribuzin(MET)under visible-light irradiation has been carried out in *** modification methods were coupling TiO_(2)nanoparticles(TO)as electron acceptors,nano-sized Fe_(2)O_(3)(FO)to construct a Z-scheme nanocomposite,and phosphate(HP)modification to promote O_(2)*** steady-state and transient-state surface photovoltage spectra and transient photoluminescence(PL)spectra confirmed that all the three modification techniques enhanced the charge separation with prolonged lifetimes and presented degradation activities in the order of TO/CN[FO/CN[HP/*** TO/CN nanocomposite showed the highest photocatalytic activity for MET degradation,with a sixfold higher rate than bulk *** chromatography–tandem mass spectrometry and radical trapping experiments indicated that the increased activity was related to the synergetic effect of two radicals(·O^(2-) and ·OH)involved in the photocatalytic degradation pathway,which was different from the·OH radical-dominated pathway of bulk *** work reveals the importance of charge separation and the influence of the radical pathway and provides guidance for the design of high-efficiency photocatalysts.

关键词： g-C_(3)N_(4) TiO_(2)modification Fe_(2)O_(3)coupling Visible-light photocatalysis Charge separation Metribuzin

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