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Kanwal A, Shahzadi T, Riaz T, Zaib M, Khan S, Habila MA, Sillanpaa M. Photocatalytic Degradation Studies of Organic Dyes over Novel Cu/Ni Loaded Reduced Graphene Oxide Hybrid Nanocomposite: Adsorption, Kinetics and Thermodynamic Studies. Molecules 2023; 28:6474. [PMID: 37764250 PMCID: PMC10535993 DOI: 10.3390/molecules28186474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 09/29/2023] Open
Abstract
Nowadays, for environmental remediation, photocatalytic process involving graphene-based semiconductors is considered a very promising oxidation process for water treatment. In the present study, nanocomposite (Cu/Ni/rGO) has been synthesized by Dypsis lutescens leaf extract. Characterization of the sample was carried out by UV-visible spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). Different parameters like contact time, nanocatalyst amount, dye concentration, effect of temperature. and pH factor were optimized to examine the maximum removal efficiency for dyes rhodamine B and alizarine R with and without visible light source. In both cases, i.e., with or without light, maximum removal was observed at 20 mg of nanocatalyst for 5 ppm concentration of both dyes at 45 °C temperature and pH 10 for rhodamine B and pH 4 for alizarine R, respectively with a 20 min contact time. Maximum removal of dyes 93% rhodamine B and 91% alizarine R were observed under a tungsten lamp as compared to without a tungsten lamp, i.e., 78% of RhB and 75% of AR from mixture solution of these dyes. To assess the rate of reaction, spontaneity, and nature of reaction thermodynamics, kinetics and adsorption isotherms were studied. Thermodynamic values indicated that both dyes depicted endothermic and spontaneous degradation processes. Isotherm data fitted best to a Freundlich isotherm, while results of kinetic studies of both dyes followed the pseudo 2nd order kinetic equation. In the end, scavenging radical studies concluded that hydroxyl radicals were the main active specie involved in the photocatalytic degradation process, and regeneration experiments resulted that Cu/Ni/rGO nanocomposites were re-utilized for about four times.
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Affiliation(s)
- Amina Kanwal
- Department of Chemistry, Government College Women University Sialkot, Sialkot 51310, Pakistan; (A.K.)
| | - Tayyaba Shahzadi
- Department of Chemistry, Government College Women University Sialkot, Sialkot 51310, Pakistan; (A.K.)
| | - Tauheeda Riaz
- Department of Chemistry, Government College Women University Sialkot, Sialkot 51310, Pakistan; (A.K.)
| | - Maria Zaib
- Department of Chemistry, University of Jhang, Jhang 35200, Pakistan
| | - Safia Khan
- Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University, Jinan 250101, China;
| | - Mohamed A. Habila
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Mika Sillanpaa
- Department of Biological and Chemical Engineering, Aarhus University, Nørrebrogade 44, 8000 Aarhus, Denmark;
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Riaz T, Asghar A, Shahzadi T, Shahid S, Mansoor S, Asghar A, Javed M, Iqbal S, Alotaibi MT, Althobiti RA, Alzahrani E, Farouk AE, Mana Al-Anazy M, Elkaeed EB. Green synthesis of ZnO and Co-ZnO using Brassica rapa leave’s extract and their activities as antioxidant agents, efficient adsorbents, and dye removal agents. Journal of Saudi Chemical Society 2023; 27:101716. [DOI: 10.1016/j.jscs.2023.101716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Shahzadi T, Iqbal S, Riaz T, Zaib M. A comparative study based on localized surface plasmon resonance optical characteristics of green synthesized nanoparticles towards spectrophotometric determination of cupric ions. Journal of Taibah University for Science 2022. [DOI: 10.1080/16583655.2022.2123206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Tayyaba Shahzadi
- Department of Chemistry, Government College Women University, Sialkot, Pakistan
| | - Shazia Iqbal
- Department of Chemistry, Government College Women University, Sialkot, Pakistan
| | - Tauheeda Riaz
- Department of Chemistry, Government College Women University, Sialkot, Pakistan
| | - Maria Zaib
- Department of Chemistry, University of Jhang, Jhang, Pakistan
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Riaz T, Munnwar A, Shahzadi T, Zaib M, Shahid S, Javed M, Iqbal S, Rizwan K, Waqas M, Khalid B, Awwad NS, Ibrahium HA, Bajaber MA. Phyto-mediated synthesis of nickel oxide (NiO) nanoparticles using leaves’ extract of Syzygium cumini for antioxidant and dyes removal studies from wastewater. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109656] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Shahzadi T, Anwaar A, Riaz T, Zaib M. Sulfate and phosphate ions removal using novel nano-adsorbents: modeling and optimization, kinetics, isotherm and thermodynamic studies. Int J Phytoremediation 2022; 24:1518-1532. [PMID: 35188838 DOI: 10.1080/15226514.2022.2040421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Many compounds containing sulfur and phosphorous are present in wastewater of various industries like food processing, paper making, etc. The higher level of phosphate and sulfate ions causes many problems in everyday life. Based on this, nickel monometallic and nickel-cobalt bimetallic nanoparticles were synthesized using leaves extract of Coix lacryma-jobi L. and applied for sulfate and phosphate ions removal. UV-Vis. spectroscopy, fourier transformed infrared spectroscopy; scanning electron microscopy; X-ray diffraction, and energy-dispersive X-ray spectroscopy were used as characterizing techniques for synthesized nanoparticles. UV spectra for Ni nanoparticles showed the absorption band in the 380-400 nm range, while for Ni-Co bimetallic nanoparticles was noticed at 396 nm and 513 nm. Different functional groups were observed in FTIR spectra of leaves extract which acted as reducing and capping agents to form stable NPs. Different factors like adsorbent dosage, pH, temperature, adsorbate concentration, and time were optimized for maximum removal of sulfate and phosphate anions. The antioxidant potential of prepared nanoparticles was assessed by three different methods. The kinetics, thermodynamics, and adsorption isotherms were also studied for these ions removal. In the current study, the green approach was easy, time-saving and proved to be beneficial to remove sulfate and phosphate anions from wastewater.
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Affiliation(s)
- Tayyaba Shahzadi
- Department of Chemistry, Government College for Women University, Sialkot, Pakistan
| | - Asma Anwaar
- Department of Chemistry, Government College for Women University, Sialkot, Pakistan
| | - Tauheeda Riaz
- Department of Chemistry, Government College for Women University, Sialkot, Pakistan
| | - Maria Zaib
- Department of Chemistry, University of Jhang, Jhang, Pakistan
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Riaz T, Ashfaq M, Khan Z. Evaluation of the Chilli veinal mottle virus CP gene expressing transgenic Nicotiana benthamiana plants for disease resistance against the virus. BRAZ J BIOL 2021; 82:e243692. [PMID: 34161429 DOI: 10.1590/1519-6984.243692] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/11/2020] [Indexed: 11/22/2022] Open
Abstract
Vegetables are an important source of income and high-value crops for small farmers. Chilli (Capsicum spp.) is one of the most economically important vegetables of Pakistan and it is grown throughout the country. It is a rich source of nutrition especially vitamins A, B, C and E along with minerals as folic acid, manganese (Mn), potassium (K) and molybdenum (Mo). Chilli possesses seven times more amount of vitamin C than an orange. Vitamin A, C and beta-carotenoids are strong antioxidants to scavenge the free radicals. Chilli production is restricted due to various biotic factors. Among these viruses, Chilli veinal mottle virus (ChiVMV) is one of the most destructive and menacing agents that inflicts heavy and colossal losses that accounted for 50% yield loss both in quality and quantity. Pathogen-Derived Resistance (PDR) approach is considered one of the effective approaches to manage plant viruses. In this study, ChiVMV was characterized on a molecular level, the coat protein (CP) gene of the virus was stably transformed into Nicotiana benthamiana plants using Agrobacterium tumefaciens. The transgenic plants were challenged with the virus to evaluate the level of resistance of plants against the virus. It was observed that the plants expressing CP gene have partial resistance against the virus in terms of symptoms' development and virus accumulation. Translation of this technique into elite chilli varieties will be resulted to mitigate the ChiVMV in the crop as well as an economic benefit to the farmers.
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Affiliation(s)
- T Riaz
- PMAS-Arid Agriculture University, Department of Plant Pathology, Rawalpindi, Pakistan
| | - M Ashfaq
- MNS University of Agriculture, Institute of Plant Protection - IPP, Plant Pathology, Multan, Pakistan
| | - Z Khan
- MNS University of Agriculture, Institute of Plant Breeding and Biotechnology - IPBB, Multan, Pakistan
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Khan SA, Shahid S, Ayaz A, Alkahtani J, Elshikh MS, Riaz T. Phytomolecules-Coated NiO Nanoparticles Synthesis Using Abutilon indicum Leaf Extract: Antioxidant, Antibacterial, and Anticancer Activities. Int J Nanomedicine 2021; 16:1757-1773. [PMID: 33688190 PMCID: PMC7936927 DOI: 10.2147/ijn.s294012] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/22/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND NiO nanoparticles have attracted much attention due to their unique properties. They have been synthesized using chemical and physical techniques that often need toxic chemicals. These toxic chemicals cannot easily be removed from the nanoparticle's surface, make them less biocompatible, and limit their biological applications. Instead, plants based green synthesis of nanoparticles uses phytomolecules as reducing and capping agents. These phytomolecules are biologically active with no or less toxic effects. MATERIALS AND METHODS Phytomolecules-coated NiO nanoparticles were synthesized employing a green route using Abutilon indicum leaf extract. For comparative study, we also have synthesized NiO nanoparticles using the co-precipitation method. Synthesized nanoparticles were successfully characterized using different spectroscopic techniques. The synthesized nanoparticles were evaluated for antibacterial activity with agar well diffusion assay against different bacteria compared to standard drug and plant extract. They are also examined for anticancer potential using MTT assay against HeLa cancer cells, and further, their antioxidant potential was determined using DPPH assay. Biocompatibility of the synthesized nanoparticles was assessed against fibroblast cells. RESULTS Phytomolecules-coated NiO nanoparticles were demonstrated superior antibacterial and anticancer performance against bacteria (E. coli, B. bronchiseptica, B. subtilis, and S. aureus) by presenting highest zone of inhibitions (18 ± 0.58 mm, 21 ± 0.45 mm, 22 ± 0.32 mm, and 23 ± 0.77 mm) and HeLa cancer cells by exhibiting the least cell viability percentage (51.74 ± 0.35%) compared to plant extract and chemically synthesized NiO nanoparticles but were comparable to standard antibiotic and anticancer drugs, respectively. Phytomolecules-coated NiO nanoparticles were also demonstrated excellent antioxidant activity (79.87 ± 0.43% DPPH inhibition) and biocompatibility (> 90% cell viability) with fibroblast cells. CONCLUSION Nanoparticle synthesis using the Abutilon indicum leaf extract is an efficient and economical method, produces biocompatible and more biologically active nanoparticles, which can be an excellent candidate for therapeutic applications.
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Affiliation(s)
- Shakeel Ahmad Khan
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Sammia Shahid
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, 54770, Pakistan
| | - Amber Ayaz
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, 54770, Pakistan
| | - Jawaher Alkahtani
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mohamed S Elshikh
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Tauheeda Riaz
- Department of Chemistry, Government College Women University Sialkot, Sialkot, Pakistan
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Abbasi MA, Irshad M, Rehman AU, Riaz T, Siddiqui SZ, Shahid M. In vitro assessment of antibacterial, antifungal, enzyme inhibition and hemolytic activities of various fractions of Rhynchosia pseudo-cajan. Pak J Pharm Sci 2019; 32:2003-2010. [PMID: 31813864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The aims of the present investigation were to assess the antibacterial, antifungal, enzyme inhibition and hemolytic activities of various fractions of Rhynchosia pseudo-cajan Cambess. The methanolic extract of the plant was dissolved in the water (distilled) and then partitioned with the n-hexane, chloroform, EtOAc and n-BuOH sequentially. Antibacterial activity was checked against Escherichia coli, Pasturella multocida, Bacillus subtilis and Staphylococcus aureus by the disc diffusion method using streptomycin sulphate, a standard antibiotic, as positive control. Chloroform and ethyl acetate soluble fractions showed good activity against Escherichia coli, Bacillus subtilis and Staphylococcus aureus. These fractions also showed good MIC values. The n-butanol soluble and remaining aqueous fraction also showed good activity against some strains. Antifungal activity was studied against four fungi i.e. Aspergillus niger, Aspergillus flavus, Ganoderma lucidum and Alternaria alternata by the disc diffusion method using fluconazole, a standard antifungal drug, as positive control. Chloroform, n-butanol and ethyl acetate soluble fraction showed good activity only against G. lucidum. Enzyme inhibition studies were done against four enzymes i.e. α-glucosidase, butyrylcholinesterase, acetyl cholinesterase and lipoxygenase. Aqueous fraction possessed very good activity against α-glucosidase, even greater than acarbose, a reference standard drug. Its IC50 value was found as 29.81±0.12 μg/ml as compared to acarbose having IC50 38.62±0.04 μg/ml. Chlroform and ethyl acetate soluble fractions also showed good activity against α-glucosidase. Ethyl acetate soluble and remaining aqueous fractions showed good activity against lipoxygenase. All the studied fractions showed very less toxicity i.e. <2.5%.
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Affiliation(s)
| | - Misbah Irshad
- Division of Science and Technology, University of Education, Township Campus, Lahore, Pakistan
| | - Aziz Ur Rehman
- Department of Chemistry, Government College University, Lahore, Pakistan
| | - Tauheeda Riaz
- Department of Chemistry, Government College University, Lahore, Pakistan
| | | | - Muhammad Shahid
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
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Riaz T, Abbasi MA, Rehman A, Shazadi T, Shahid M. Report: Assessment of Fumaria indica, Dicliptera bupleuroides and Curcuma zedoaria for their antimicrobial and hemolytic effects. Pak J Pharm Sci 2019; 32:697-702. [PMID: 31081785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The present investigation was undertaken to evaluate the antibacterial, antifungal and hemolytic activities of organic and aqueous fractions of Fumaria indica, Dicliptera bupleuroides and Curcuma zedoaria. The methanolic extracts of the plants were dissolved in the water (distilled) separately and then partitioned with the n-hexane, CHCl3, EtOAc and n-BuOH sequentially. Antibacterial activity was checked against Escherichia coli, Pasturella multocida, Bacillus subtilis and Staphylococcus aureus by the disc diffusion method using streptomycin sulphate, a standard antibiotic, as positive control. Antifungal activity was studied against four fungi i.e. Aspergillus niger, Aspergillus flavus, Ganoderma lucidum and Alternaria alternata by the disc diffusion method using fluconazole, a standard antifungal drug, as positive control. It was revealed that aqueous fraction of F. indica showed very good antibacterial activity against P. multocida with zone of inhibition 26mm and MIC of 98μg/mL. Its CHCl3 and n-BuOH fractions also displayed good results. Its CHCl3 fraction showed good antifungal activity against G. lucidum with zone of inhibition 24mm and MIC of 115μg/mL. Other polar fractions of F. indica showed good activity against somefungal strains. The CHCl3 and EtOAc fractions of D. bupleuroides displayed good antibacterial activity against some bacterial strains. Its EtOAc fraction showed good antifungal activity only against G. lucidum. The CHCl3 fraction of C. zedoaria showed good activity against all studied bacterial strains, while its EtOAc and n-BuOH fractions displayed good results against some bacterial strains. None of the fractions of C. zedoaria displayed antifungal activity against the under test strains. All the studied fractions of three plants showed very less toxicity except n-hexane fraction of D. bupleuroides which showed 79% toxicity.
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Affiliation(s)
- Tauheeda Riaz
- Department of Chemistry, Government College for Women University, Sialkot, Pakistan
| | | | - Azizur Rehman
- Department of Chemistry, Government College University, Lahore, Pakistan
| | - Tayyaba Shazadi
- Department of Chemistry, Government College for Women University, Sialkot, Pakistan
| | - Muhammad Shahid
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
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Riaz T, Abbasi MA, Rehman A, Siddiqui SZ, Shahid M, Fatima H, Ashraf M, Ejaz SA, Rasool ZG, Abbasi GH. Enzyme inhibitory, Antifungal, Antibacterial and hemolytic potential of various fractions of Colebrookia oppositifolia. Pak J Pharm Sci 2017; 30:105-112. [PMID: 28603120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The purpose of the present investigation was to assess the enzyme inhibition, antifungal, antibacterial and hemolytic activities of various fractions of Colebrookia oppositifolia Smith. The MeOH extract of plant was dissolved in dist. water and partitioned with n-hexane, CHCl3, EtOAc and n-BuOH sequentially. Enzyme inhibition studies were done against four enzymes i.e. α-glucosidase, butyrylcholinesterase, acetyl cholinesterase and lipoxygenase. Ethyl acetate fraction possessed very good activity against α-glucosidase (IC50 57.38±1.23µg/mL). CHCl3 fraction displayed good activity against α-glucosidase and lipoxygenase while moderate activity against butyryl cholinesterase. EtOAc fraction displayed good activity against lipoxygenase. Antifungal activity was studied against four fungi i.e. Aspergillus niger, Aspergillus flavus, Ganoderma lucidum and Alternaria alternata by the disc diffusion method using fluconazole, a standard antifungal drug, as positive control. Aqueous fraction displayed good activity against G. lucidum and A. flavus. Antibacterial activity was checked against Staphylococcus aureus, Bacillus subtilis, Pasturella multocida and Escherichia coli by the disc diffusion method using streptomycin sulphate, a standard antibiotic, as positive control. Chloroform, ethyl acetate and aqueous fraction showed good activity against E. coli. Chloroform fraction showed good activity against B. subtilis. Ethyl acetate fraction showed good activity against the P. multocida. All the studied fractions showed very less toxicity i.e. < 7%.
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Affiliation(s)
- Tauheeda Riaz
- Department of Chemistry, Government College for Women University, Sialkot, Pakistan
| | | | - Azizur Rehman
- Department of Chemistry, Government College University, Lahore, Pakistan
| | | | - Muhammad Shahid
- Department of Chemistry, Government College University, Lahore, Pakistan
| | - Hina Fatima
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Ashraf
- Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Syeda Abida Ejaz
- Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Zahid Ghulam Rasool
- Pakistan Atomic Energy Commission, Atomic Energy Minerals Centre, Lahore, Pakistan
| | - Ghulam Hasan Abbasi
- 6Department of Soil Sciences, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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Shahid S, Riaz T, Asghar MN. Screening of Ranunculus sceleratus for enzyme inhibition, antibacterial and antioxidant activities. BANGL J PHARMACOL 2015. [DOI: 10.3329/bjp.v10i2.22805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
<p>Enzyme inhibition potential of various fractions of <em>Ranunculus sceleratus</em> was checked against α-glucosidase, butyrylcholinesterase, acetylcholinesterase and lipoxygenase enzymes. n-Butanol fraction showed very good activity (77.5 ± 1.0% inhibition at 0.1 mg/mL) against α-glucosidase. Its IC<sub>50</sub> value was 35.7 ± 1.0 µg/mL comparable to quercetin (IC<sub>50</sub> value 16.5 ± 0.4 µg/mL). Antibacterial activity was checked against five bacterial strains by 96-wells microplate assay using ciprofloxacin, a standard antibiotic. Chloroform, ethyl acetate, n-butanol and aqueous fractions showed excellent activity against <em>Pseudomonas aeruginosa</em>, (MIC at 7.1, 7.8, 5.6 and 5.3 respectively), which is greater than standard antibiotic ciprofloxacin (MIC 10.0). The antioxidant potential of all the fractions was evaluated. Ethyl acetate soluble fraction exhibited highest percent inhibition of DPPH radical as compared to other fractions. It showed 80.9 ± 1.2% inhibition of DPPH radical at a concentration of 30 µg/mL. These results suggest that <em>R. sceleratus</em> is a valuable herb, which inhibits the oxidative stress mechanism that lead to degenerative diseases. </p><p> </p>
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Choi JO, Riaz T, Boilson B, Schirger J, Pereira N, Clavell A, Frantz R, Daly R, Edwards B, Park S, Rodeheffer R, Kushwaha S. Long-Term Renoprotective Effect of Sirolimus-Based Calcineurin Inhibitor-Free Immunosuppression after Cardiac Transplantation. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Shahzadi T, Abbasi MA, Ur-Rehman A, Riaz T, Khan KM, Ashraf M, Afzal I, Akhtar MN, Ajaib M. Antioxidant and lipoxygenase inhibiting new iridoid glucosides fromCaryopteris odorata. Nat Prod Res 2013; 27:302-13. [DOI: 10.1080/14786419.2012.668692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Riaz T, Abbasi MA, Rubab K, Shahzadi T, Ajaib M, Khan KM. Cotinus coggyria: a rich source of antioxidants. Pak J Pharm Sci 2012; 25:679-686. [PMID: 22713961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Methanolic extract of Cotinus coggyria Scop. was mixed in distilled water and partitioned first with the n-hexane, then with chloroform, then ethyl acetate and at the end with n-butanol. The phytochemical screening of plant showed presence of the phenolics, cardiac glycosides and flavonoides in large amount in the chloroform, n-butanol and ethyl acetate soluble fraction. Antioxidant activity of these four fractions and the left behind aqueous fraction was measured by four methods such as: 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity, ferric thiocyanate assay, ferric reducing antioxidant power (FRAP) assay and total antioxidant activity. Total phenolics were also measured. Noteworthy antioxidant potential was shown by the chloroform, n-butanol and ethyl acetate soluble fraction showed. Ethyl acetate fraction showed highest % inhibition of the DPPH radical when compared with the other studied fractions i.e. 81.64 ± 1.29% inhibition of the DPPH radical at the concentration of 30 μg/ml. Its IC(50) value was found to be 15.58 ± 0.09 μg/ml, comparative to the butylated hydroxytoluene (BHT), which has IC(50) value 12.6 ± 0.85μg/ml. This fraction also showed the highest lipid peroxidation inhibition (61.41 ± 1.16%), as well as highest values of FRAP (697.76 ± 1.98 μg of trolox equivalents) total antioxidant activity (1.02 ± 0.09) and total phenolic contents (229.34 ± 0.57) comparative to the other studied fractions. The chloroform and n-butanol soluble fraction also showed good results for all the studied antioxidant assays.
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Affiliation(s)
- Tauheeda Riaz
- Department of Chemistry, Government College University, Lahore, Pakistan
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Abbasi MA, Rubab K, Rehman A, Riaz T, Shahzadi T, Khalid M, Ajaib M. In vitro assessment of relief to oxidative stress by different fractions of Boerhavia procumbens. Pak J Pharm Sci 2012; 25:357-364. [PMID: 22459462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Methanolic extract of Boerhavia procumbens Bank ex Roxb. was partitioned with n-hexane, chloroform, ethyl acetate and n-butanol sequentially after dissolving in distilled water. Phytochemical screening showed presence of phenolics, flavonoides and cardiac glycosides in large amount in chloroform, ethyl acetate and n-butanol soluble fraction. The antioxidant activity of all these fractions and the remaining aqueous fraction was evaluated by four methods such as: 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity, ferric reducing antioxidant power (FRAP) assay, total antioxidant activity and ferric thiocyanate assay. Total phenolics were also determined. Some fractions showed noteworthy antioxidant activity. The results of the antioxidant activity revealed that the ethyl acetate soluble fraction showed the highest value of percent inhibition of DPPH (82.54 ± 0.62) at the concentration of 125 μ g/ml. The IC(50) of this fraction was 37.11± 0.23 μg/ml, compared with butylated hydroxytoluene (BHT), which have IC(50) of 12.1 ± 0.92 μ/mL. It also showed the highest FRAP value (251.08 ± 1.46 μg of trolox equivalents) as well as the highest value of lipid peroxidation inhibition (57.21 ± 52%), the highest total antioxidant activity (0.549 ± 0.08) and also the highest total phenolic contents (77.1 ± 0.6) as compared to the studied fractions. Phytochemical screening showed high percentage of phenolics, flavonoides and cardiac glycosides in this fraction.
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Wahab F, Riaz T, Shahab M. Study on the effect of peripheral kisspeptin administration on basal and glucose-induced insulin secretion under fed and fasting conditions in the adult male rhesus monkey (Macaca mulatta). Horm Metab Res 2011; 43:37-42. [PMID: 21136344 DOI: 10.1055/s-0030-1268458] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Kisspeptin (KP)-Kiss1r, a ligand-receptor pair, has recently been implicated as a pivotal regulator of the neuroendocrine reproductive axis. KISS1 (encoding KP) as well as KISS1R (encoding receptor for KP) are expressed in several peripheral tissues including the pancreas. But the specific role of KP in the physiology of pancreas is still incompletely deciphered. This study was designed to examine the effect of peripheral KP administration on basal and glucose-induced plasma insulin (an important pancreatic hormone) secretion under fed and fasting conditions in the adult male rhesus monkey. A set of 4 chair-restraint habituated intact adult male rhesus monkeys were assigned to receive intravenous bolus administration of human kisspeptin-10 (KP10, 50 μg), and vehicle (1 ml) in normal fed and fasting conditions without or with glucose infusions. Plasma concentrations of insulin were measured by using a specific IRMA. Glucose infusion significantly stimulated plasma insulin levels (p<0.005). Vehicle administration did not affect both basal and glucose stimulated insulin in fed as well as in fasting condition. KP10 administration had no effect on the basal insulin levels in both fed and fasting as compared to pretreatment or vehicle treatment levels, while it significantly heightened glucose stimulated insulin levels (p<0.05) in both fed and fasted monkeys. The present results show that KP administration does not affect the basal secretion of insulin under both fed and fasting condition while potentiated the glucose-induced insulin levels in the adult male rhesus monkey. Therefore, these findings suggest a potential role of KP in the physiology of pancreas.
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Affiliation(s)
- F Wahab
- Department of Animal Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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Aziz-Ur-Rehman A, Gulzar S, Abbasi M, Shahzadi T, Riaz T, Siddiqui S, Ajaib M. In vitro assessment of the protection from oxidative stress by various fractions of Artemisia incisa Pamp. JSCS 2011. [DOI: 10.2298/jsc110102116a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The methanolic extract of Artemisia incisa Pamp. was dissolved in distilled
water and successively partitioned with n-hexane, chloroform, ethyl acetate
and n-butanol. The antioxidant potential of all these fractions and remaining
aqueous fraction was evaluated by four methods, i.e., the scavenging activity
of the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH), the total antioxidant
activity, the ferric reducing antioxidant power (FRAP) assay and the ferric
thiocyanate assay. In addition, the total phenolics was determined. The
obtained results revealed that among the studied fractions the ethyl acetate
soluble fraction showed the most potent DPPH-radical scavenging activity with
an IC50 value of 5.3 ? 0.71 ?g mL-1, which is even more effective than the
standard antioxidant butylated hydroxytoluene (BHT) (IC50 value 0f 12.1? 0.92
?g mL-1). The ethyl acetate fraction also showed the highest FRAP value
(3677.13 ? 27.1 ?g TE mL-1), inhibition of lipid peroxidation (60.93 ? 0.84 %
at 500 ?g mL-1) and total phenolic content (95.5 ? 0.05 ?g GAE g-1) as
compared to other fractions. However, the remaining aqueous fraction was
found to posses the highest antioxidant activity of all the fractions.
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Affiliation(s)
- A Aziz-Ur-Rehman
- Government College University, Department of Chemistry, Lahore, Pakistan
| | - Sehrish Gulzar
- Government College University, Department of Chemistry, Lahore, Pakistan
| | - Muhammad Abbasi
- Government College University, Department of Chemistry, Lahore, Pakistan
| | - Tayyaba Shahzadi
- Government College University, Department of Chemistry, Lahore, Pakistan
| | - Tauheeda Riaz
- Government College University, Department of Chemistry, Lahore, Pakistan
| | - Sabahat Siddiqui
- Government College University, Department of Chemistry, Lahore, Pakistan
| | - Muhammad Ajaib
- Government College University, Department of Botany, Lahore, Pakistan
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Abbasi MA, Shahzadi T, Akkurt M, Aziz-Ur-Rehman, Riaz T. 6-Hydroxy-methyl-4-meth-oxy-2H-pyran-2-one (Opuntiol). Acta Crystallogr Sect E Struct Rep Online 2009; 66:o199. [PMID: 21580082 PMCID: PMC2980196 DOI: 10.1107/s1600536809053860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 12/14/2009] [Indexed: 11/22/2022]
Abstract
The title compound, C7H8O4, isolated from Opuntia dillenii Haw (Cactaceae), is almost planar [maximum deviation of 0.027 (2) Å] except for the H atoms of the methylene and methyl groups. The crystal packing is stabilized by C—H⋯O and O—H⋯O intermolecular hydrogen bonds, resulting in the formation of a three-dimensional network.
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Abstract
After the Arab oil embargo of 1973, oil prices rose rapidly
and the energy importing economies experienced an exogenously determined
real supply shock, which, in most cases, led to a fall in their rates of
economic growth and a corresponding rise in the rates of inflation. The
energy situation emerged as a serious issue and the relationship between
energy consumption and economic growth came into sharp focus. The last
decade has been a period of disequilibrium, structural adjustment and
adoption of strategies to cope with the previously unknown phenomenon of
stagflation.
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