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Shahid Iqbal
Department of Chemistry, University of Education Jauharabad Campus, Jauharabad 41200, Pakistan

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Journal article
Published: 05 July 2021 in Coatings
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Iron–copper bimetallic nanoparticles (Fe-Cu BNPs) were prepared via a green synthesis route. Ixora finlaysoniana has been used in this study as a capping and stabilizing agent in the modification of Fe-Cu BNPs. As-synthesized BNPs were characterized using different techniques including UV/Vis spectrophotometry, FTIR, XRD and SEM. A particle size analyzer and SEM studies indicated the particle size to be in the range of 50–200 nm. In addition, degradation of MB dye in an aqueous system and radical-scavenging potential in a DPPH assay were also examined using BNPs. Methylene blue dye degradation in 17 min was monitored with UV/Vis spectrophotometry, which exhibited the efficiency of Fe-Cu BNPs. Bimetallic nanoparticles were also found to be efficient in neutralizing DPPH free radicals. Furthermore, kinetic studies of both dye degradation and radical scavenging potential are reported in this article. Subsequently, Fe-Cu BNPs synthesized via a green and sustainable method can be employed for dye degradation and free radical-scavenging activities.

ACS Style

Umer Younas; Syed Hassan; Faisal Ali; Faiza Hassan; Zohaib Saeed; Muhammad Pervaiz; Safia Khan; Fakiha Jannat; Sidra Bibi; Ayesha Sadiqa; Zahid Ali; Shahid Iqbal; Ayman Ghfar; Mohamed Ouladsmane; Murefah Al-Anazy; Shafaqat Ali. Radical Scavenging and Catalytic Activity of Fe-Cu Bimetallic Nanoparticles Synthesized from Ixora finlaysoniana Extract. Coatings 2021, 11, 813 .

AMA Style

Umer Younas, Syed Hassan, Faisal Ali, Faiza Hassan, Zohaib Saeed, Muhammad Pervaiz, Safia Khan, Fakiha Jannat, Sidra Bibi, Ayesha Sadiqa, Zahid Ali, Shahid Iqbal, Ayman Ghfar, Mohamed Ouladsmane, Murefah Al-Anazy, Shafaqat Ali. Radical Scavenging and Catalytic Activity of Fe-Cu Bimetallic Nanoparticles Synthesized from Ixora finlaysoniana Extract. Coatings. 2021; 11 (7):813.

Chicago/Turabian Style

Umer Younas; Syed Hassan; Faisal Ali; Faiza Hassan; Zohaib Saeed; Muhammad Pervaiz; Safia Khan; Fakiha Jannat; Sidra Bibi; Ayesha Sadiqa; Zahid Ali; Shahid Iqbal; Ayman Ghfar; Mohamed Ouladsmane; Murefah Al-Anazy; Shafaqat Ali. 2021. "Radical Scavenging and Catalytic Activity of Fe-Cu Bimetallic Nanoparticles Synthesized from Ixora finlaysoniana Extract." Coatings 11, no. 7: 813.

Journal article
Published: 18 February 2021 in Sustainability
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In order to conserve the energy used for remediation of harmful metals from aqueous media, an adsorption process was performed. It is efficient and low-cost method with zero carbon emissions as compared to other methods. A hematite-based novel nanomaterial loaded onto biochar was utilized for the remediation of toxic cadmium metal ions from aqueous media. Saccharum munja has been employed as low-cost feedstock to prepare the biochar. Three adsorbents i.e., raw Saccharum munja (SM), Saccharum munja biochar (SMBC) and hematite-loaded Saccharum munja bichar (HLSMBC) were used in batch adsorption tests to study uptake of metal ions by optimizing the experimental parameters. Experimental data and calculated results revealed maximum sorption efficiency of Cd(II) removal was given by HLSMBC (72 ppm) and SMBC (67.73 ppm) as compared with SM (48.7 ppm). Among adsorption isotherms applied on work best fit for Cd(II) adsorption on SM was found for a Freundlich isotherm with high values of correlation coefficient R2 ≥ 0.9 for all sorbents and constant 1/n values between 0–1. Equilibrium results were evaluated using five different types of errors functions. Thermodynamic studies suggested feasible, spontaneous and endothermic nature of adsorption process, while, the ∆H parameter < 80 kJ/mol indicated physiosorption and positive ∆S values promoted randomness of ions with increase in adsorption process. Data fitted into type I of pseudo second order kinetics having R2 ≥ 0.98 and rate constants K2 (0–1). Desorption process was also performed for storage, conservation and reuse of sorbent and sorbate materials.

ACS Style

Tunzeel Iqbal; Shahid Iqbal; Fozia Batool; Dimitrios Thomas; Malik Iqbal. Utilization of a Newly Developed Nanomaterial Based on Loading of Biochar with Hematite for the Removal of Cadmium Ions from Aqueous Media. Sustainability 2021, 13, 2191 .

AMA Style

Tunzeel Iqbal, Shahid Iqbal, Fozia Batool, Dimitrios Thomas, Malik Iqbal. Utilization of a Newly Developed Nanomaterial Based on Loading of Biochar with Hematite for the Removal of Cadmium Ions from Aqueous Media. Sustainability. 2021; 13 (4):2191.

Chicago/Turabian Style

Tunzeel Iqbal; Shahid Iqbal; Fozia Batool; Dimitrios Thomas; Malik Iqbal. 2021. "Utilization of a Newly Developed Nanomaterial Based on Loading of Biochar with Hematite for the Removal of Cadmium Ions from Aqueous Media." Sustainability 13, no. 4: 2191.

Journal article
Published: 05 August 2020 in Polish Journal of Environmental Studies
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The usage of industrial effluents for agricultural purposes has become common practice both in developing and developed countries. Industrial effluents may add significant amount of nutrients for the nourishment of soil. However, the presence of various pollutants in effluents may deteriorate...

ACS Style

Umer Younas; Shahid Iqbal; Zohaib Saeed; Saba Ibrahim; Shazia Khurshid; Muhammad Pervaiz; Asif Saleem; Asma Zaidi; Munawar Iqbal; Arif Nazir. Heavy Metal Enrichment of Soil Irrigated with Paper and Board Mill (PBM) Effluents. Polish Journal of Environmental Studies 2020, 29, 4463 -4468.

AMA Style

Umer Younas, Shahid Iqbal, Zohaib Saeed, Saba Ibrahim, Shazia Khurshid, Muhammad Pervaiz, Asif Saleem, Asma Zaidi, Munawar Iqbal, Arif Nazir. Heavy Metal Enrichment of Soil Irrigated with Paper and Board Mill (PBM) Effluents. Polish Journal of Environmental Studies. 2020; 29 (6):4463-4468.

Chicago/Turabian Style

Umer Younas; Shahid Iqbal; Zohaib Saeed; Saba Ibrahim; Shazia Khurshid; Muhammad Pervaiz; Asif Saleem; Asma Zaidi; Munawar Iqbal; Arif Nazir. 2020. "Heavy Metal Enrichment of Soil Irrigated with Paper and Board Mill (PBM) Effluents." Polish Journal of Environmental Studies 29, no. 6: 4463-4468.

Journal article
Published: 27 September 2018 in Notulae Scientia Biologicae
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Herbal industry of developing countries is facing several technical issues related to the extraction conditions in order to attain the maximum yield of a plant extract with maximum therapeutic attributes. Therefore the present study was aimed to investigate the best technique for respective herbal products. The effect of three different extraction techniques: ultrasonic assisted extraction, microwave assisted and orbital shaker assisted extraction, by using three solvents (80% methanol, ethanol, and ethyl acetate) on the antioxidant potential of Caralluma tuberculata stem (non-conventional vegetable) extracts were investigated. Folin-Ciocalteu method was applied on tested samples in order to find the concentration of total phenols. Therefore, the optimized extract of high yield and maximum total phenolic content was selected for further analysis like total flavonoid contents, FRAP, DPPH and ABTS scavenging potential. Quantification of phenolic acids in the extracts was also carried out by HPLC. Significant variation was observed in the yield of total phenols within the extracts, but better results were obtained in aqueous methanolic extract of ultrasonic assisted extraction, followed by microwave assisted and orbital shaker assisted extraction. Present findings supported the view that ultrasonic assisted extraction can be used for phytochemicals profiling, activity guided assays and the development of herbal products. Correlation coefficients of active principles indicated a significant relationship to antioxidant capacity P < 0.05.

ACS Style

Sobia Noreen; Ishtiaq Hussain; Muhammad Ilyas Tariq; Shahid Iqbal; Fozia Batool; Shazia Akram Ghumman; Shazia Noureen; Tusneem Kausar. Influence of Extraction Scheme on the Antioxidant Potential of Caralluma tuberculata. Notulae Scientia Biologicae 2018, 10, 340 -347.

AMA Style

Sobia Noreen, Ishtiaq Hussain, Muhammad Ilyas Tariq, Shahid Iqbal, Fozia Batool, Shazia Akram Ghumman, Shazia Noureen, Tusneem Kausar. Influence of Extraction Scheme on the Antioxidant Potential of Caralluma tuberculata. Notulae Scientia Biologicae. 2018; 10 (3):340-347.

Chicago/Turabian Style

Sobia Noreen; Ishtiaq Hussain; Muhammad Ilyas Tariq; Shahid Iqbal; Fozia Batool; Shazia Akram Ghumman; Shazia Noureen; Tusneem Kausar. 2018. "Influence of Extraction Scheme on the Antioxidant Potential of Caralluma tuberculata." Notulae Scientia Biologicae 10, no. 3: 340-347.

Articles
Published: 27 December 2017 in Journal of Environmental Science and Health, Part B
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The present study describes Quantitative Structure Property Relationship (QSPR) modeling to relate metal ions characteristics with adsorption potential of Ficus carica leaves for 13 selected metal ions (Ca+2, Cr+3, Co+2, Cu+2, Cd+2, K+1, Mg+2, Mn+2, Na+1, Ni+2, Pb+2, Zn+2, and Fe+2) to generate QSPR model. A set of 21 characteristic descriptors were selected and relationship of these metal characteristics with adsorptive behavior of metal ions was investigated. Stepwise Multiple Linear Regression (SMLR) analysis and Artificial Neural Network (ANN) were applied for descriptors selection and model generation. Langmuir and Freundlich isotherms were also applied on adsorption data to generate proper correlation for experimental findings. Model generated indicated covalent index as the most significant descriptor, which is responsible for more than 90% predictive adsorption (α = 0.05). Internal validation of model was performed by measuring [Formula: see text] (0.98). The results indicate that present model is a useful tool for prediction of adsorptive behavior of different metal ions based on their ionic characteristics.

ACS Style

Fozia Batool; Shahid Iqbal; Jamshed Akbar. Impact of metal ionic characteristics on adsorption potential of Ficus carica leaves using QSPR modeling. Journal of Environmental Science and Health, Part B 2017, 53, 276 -281.

AMA Style

Fozia Batool, Shahid Iqbal, Jamshed Akbar. Impact of metal ionic characteristics on adsorption potential of Ficus carica leaves using QSPR modeling. Journal of Environmental Science and Health, Part B. 2017; 53 (4):276-281.

Chicago/Turabian Style

Fozia Batool; Shahid Iqbal; Jamshed Akbar. 2017. "Impact of metal ionic characteristics on adsorption potential of Ficus carica leaves using QSPR modeling." Journal of Environmental Science and Health, Part B 53, no. 4: 276-281.

Journal article
Published: 14 July 2017 in International Journal of Green Energy
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ACS Style

Taslim Akhtar; Muhammad Ilyas Tariq; Shahid Iqbal; Nargis Sultana; Chan Kim Wei. Corrigendum. International Journal of Green Energy 2017, 14, 1081 -1081.

AMA Style

Taslim Akhtar, Muhammad Ilyas Tariq, Shahid Iqbal, Nargis Sultana, Chan Kim Wei. Corrigendum. International Journal of Green Energy. 2017; 14 (12):1081-1081.

Chicago/Turabian Style

Taslim Akhtar; Muhammad Ilyas Tariq; Shahid Iqbal; Nargis Sultana; Chan Kim Wei. 2017. "Corrigendum." International Journal of Green Energy 14, no. 12: 1081-1081.

Journal article
Published: 10 April 2017 in International Journal of Green Energy
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ACS Style

Taslim Akhtar; Muhammad Ilyas Tariq; Shahid Iqbal; Nargis Sultana; Chan Kim Wei. Production and Characterization of Biodiesel from Eriobotrya Japonica Seed Oil: an Optimization Study. International Journal of Green Energy 2017, 13, 746 -574.

AMA Style

Taslim Akhtar, Muhammad Ilyas Tariq, Shahid Iqbal, Nargis Sultana, Chan Kim Wei. Production and Characterization of Biodiesel from Eriobotrya Japonica Seed Oil: an Optimization Study. International Journal of Green Energy. 2017; 13 (6):746-574.

Chicago/Turabian Style

Taslim Akhtar; Muhammad Ilyas Tariq; Shahid Iqbal; Nargis Sultana; Chan Kim Wei. 2017. "Production and Characterization of Biodiesel from Eriobotrya Japonica Seed Oil: an Optimization Study." International Journal of Green Energy 13, no. 6: 746-574.

Journal article
Published: 01 June 2015 in Viral Immunology
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Hepatitis C virus (HCV) infection is a worldwide health problem affecting about 300 million individuals. HCV causes chronic liver disease, liver cirrhosis, hepatocellular carcinoma, and death. Many side effects are associated with the current treatment options. Natural products that can be used as anti-HCV drugs are thus of considerable potential significance. NS3 serine protease (NS3-SP) is a target for the screening of antiviral activity against HCV. The present work explores plants with anti-HCV potential, isolating possible lead compounds. Ten plants, used for medicinal purposes against different infections in rural areas of Pakistan, were collected. The cellular toxicity effects of methanolic extracts of the plants on the viability of Huh-7 cells were studied through the Trypan blue dye exclusion method. Following this, the anti-HCV potential of phytoextracts was assessed by infecting liver cells with HCV-3a-infected serum inoculum. Only the methanolic extract of Portulaca oleracea L. (PO) exhibited more than 70% inhibition. Four fractions were obtained through bioassay-guided extraction of PO. Subsequent inhibition of all organic extract fractions against NS3 serine protease was checked to track the specific target in the virus. The results showed that the PO methanolic crude and ethyl acetate extract specifically abridged the HCV NS3 protease expression in a dose-dependent fashion. Hence, PO extract and its constituents either alone or with interferon could offer a future option to treat chronic HCV.

ACS Style

Sobia Noreen; Ishtiaq Hussain; Muhammad Ilyas Tariq; Bushra Ijaz; Shahid Iqbal; Qamar- Ul- Zaman; Usman Ali Ashfaq; Tayyab Husnain. Portulaca oleraceaL. as a Prospective Candidate Inhibitor of Hepatitis C Virus NS3 Serine Protease. Viral Immunology 2015, 28, 282 -289.

AMA Style

Sobia Noreen, Ishtiaq Hussain, Muhammad Ilyas Tariq, Bushra Ijaz, Shahid Iqbal, Qamar- Ul- Zaman, Usman Ali Ashfaq, Tayyab Husnain. Portulaca oleraceaL. as a Prospective Candidate Inhibitor of Hepatitis C Virus NS3 Serine Protease. Viral Immunology. 2015; 28 (5):282-289.

Chicago/Turabian Style

Sobia Noreen; Ishtiaq Hussain; Muhammad Ilyas Tariq; Bushra Ijaz; Shahid Iqbal; Qamar- Ul- Zaman; Usman Ali Ashfaq; Tayyab Husnain. 2015. "Portulaca oleraceaL. as a Prospective Candidate Inhibitor of Hepatitis C Virus NS3 Serine Protease." Viral Immunology 28, no. 5: 282-289.

Scientific communication
Published: 02 January 2015 in Environmental Forensics
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Hair and nail samples from young Pakistani adults were separately analyzed for quantification of Cd, Cr, Cu, Ni, Pb, and Zn concentrations. The concentrations of these metals were also analyzed in commonly consumed local foods to evaluate potential correlation of hair and nail concentrations with diet. Pearson correlation coefficients ranged from 0.349 to 0.999, demonstrating diet to be a significant contributor for accumulation of heavy metals in humans.

ACS Style

Fozia Batool; Shahid Iqbal; Kim Wei Chan; Muhammad Ilyas Tariq; Afzal Shah; Muhammad Mustaqeem. Concentrations of Heavy Metals in Hair and Nails of Young Pakistanis: Correlation with Dietary Elements. Environmental Forensics 2015, 16, 1 -6.

AMA Style

Fozia Batool, Shahid Iqbal, Kim Wei Chan, Muhammad Ilyas Tariq, Afzal Shah, Muhammad Mustaqeem. Concentrations of Heavy Metals in Hair and Nails of Young Pakistanis: Correlation with Dietary Elements. Environmental Forensics. 2015; 16 (1):1-6.

Chicago/Turabian Style

Fozia Batool; Shahid Iqbal; Kim Wei Chan; Muhammad Ilyas Tariq; Afzal Shah; Muhammad Mustaqeem. 2015. "Concentrations of Heavy Metals in Hair and Nails of Young Pakistanis: Correlation with Dietary Elements." Environmental Forensics 16, no. 1: 1-6.

Journal article
Published: 01 September 2013 in LWT - Food Science and Technology
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ACS Style

Kim Wei Chan; Nicholas M.H. Khong; Shahid Iqbal; Siti Muskinah Mansor; Maznah Ismail. Defatted kenaf seed meal (DKSM): Prospective edible flour from agricultural waste with high antioxidant activity. LWT - Food Science and Technology 2013, 53, 308 -313.

AMA Style

Kim Wei Chan, Nicholas M.H. Khong, Shahid Iqbal, Siti Muskinah Mansor, Maznah Ismail. Defatted kenaf seed meal (DKSM): Prospective edible flour from agricultural waste with high antioxidant activity. LWT - Food Science and Technology. 2013; 53 (1):308-313.

Chicago/Turabian Style

Kim Wei Chan; Nicholas M.H. Khong; Shahid Iqbal; Siti Muskinah Mansor; Maznah Ismail. 2013. "Defatted kenaf seed meal (DKSM): Prospective edible flour from agricultural waste with high antioxidant activity." LWT - Food Science and Technology 53, no. 1: 308-313.

Journal article
Published: 01 May 2013 in Chemosphere
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Current study presents the effect of irrigation with different compositions (0%, 20%, 40%, 60%, 80% and 100%) of PBM effluent on growth and antioxidant potential of Brassica rapa var. rapa L. plants. Seeds were exposed to different PBM effluent compositions, which resulted in significant decrease in their germination potential with elevated delay index. Significant changes in growth parameters (plant height, number of leaves and leaf area) were recorded for turnip plants at regular intervals (25, 50 and 75 d) as function of PBM effluent proportion. Response of biochemical and antioxidant constituents in different parts of turnip, against stress induced by PBM effluent, was assessed by estimating the contents of chlorophyll (a+b), carotenoids, protein, phenolics, flavonoids, ascorbic acid and malondialdehyde. Antioxidant activity was evaluated by measuring DPPH radical scavenging potential. The results of this study suggest that the impact of PBM effluent irrigation is dependent on concentration of effluent in irrigation mixture and is very clear on plant growth and antioxidant attributes. Maximum benefits were secured at 40% PBM effluent to irrigate turnip plants till maturity while higher concentrations were found useful for shorter period (25-50 d).

ACS Style

Shahid Iqbal; Umer Younas; Kim Wei Chan; Zohaib Saeed; Muhammad Ashraf Shaheen; Naeem Akhtar; Abdul Majeed. Growth and antioxidant response of Brassica rapa var. rapa L. (turnip) irrigated with different compositions of paper and board mill (PBM) effluent. Chemosphere 2013, 91, 1196 -1202.

AMA Style

Shahid Iqbal, Umer Younas, Kim Wei Chan, Zohaib Saeed, Muhammad Ashraf Shaheen, Naeem Akhtar, Abdul Majeed. Growth and antioxidant response of Brassica rapa var. rapa L. (turnip) irrigated with different compositions of paper and board mill (PBM) effluent. Chemosphere. 2013; 91 (8):1196-1202.

Chicago/Turabian Style

Shahid Iqbal; Umer Younas; Kim Wei Chan; Zohaib Saeed; Muhammad Ashraf Shaheen; Naeem Akhtar; Abdul Majeed. 2013. "Growth and antioxidant response of Brassica rapa var. rapa L. (turnip) irrigated with different compositions of paper and board mill (PBM) effluent." Chemosphere 91, no. 8: 1196-1202.

Journal article
Published: 01 May 2013 in Journal of Cereal Science
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ACS Style

Kim Wei Chan; Nicholas M.H. Khong; Shahid Iqbal; Maznah Ismail. Isolation and antioxidative properties of phenolics-saponins rich fraction from defatted rice bran. Journal of Cereal Science 2013, 57, 480 -485.

AMA Style

Kim Wei Chan, Nicholas M.H. Khong, Shahid Iqbal, Maznah Ismail. Isolation and antioxidative properties of phenolics-saponins rich fraction from defatted rice bran. Journal of Cereal Science. 2013; 57 (3):480-485.

Chicago/Turabian Style

Kim Wei Chan; Nicholas M.H. Khong; Shahid Iqbal; Maznah Ismail. 2013. "Isolation and antioxidative properties of phenolics-saponins rich fraction from defatted rice bran." Journal of Cereal Science 57, no. 3: 480-485.

Original articles
Published: 01 January 2013 in International Journal of Food Properties
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The effects of three extraction techniques (shaking, soaking, and stirring) and two solvents (80% methanol and 80% ethanol) on the antioxidant attributes of extracts from seeds of mungbean have been investigated. The yield of mungbean extracts varied between 6.90 and 9.65 g/100 g of dry matter. Mungbean extracts contained a considerable amount of phenolics (0.78–1.12 g GAE/100 g) and flavonoids (1.23–1.78 g CE/100 g). An appreciable level of reducing power (1.46–2.18) at 10 mg/mL extract concentration, inhibition of linoleic acid peroxidation (85.2–90.4%), and DPPH radical scavenging activity (IC50 value 16.4–42.9 μg/mL) were also documented. Overall, the efficacy of an extraction system in isolating potent antioxidant components from mungbean seeds followed the order: shaking, 80% methanol > shaking, 80% ethanol > stirring, 80% methanol > stirring, 80% ethanol > soaking, 80% ethanol > soaking, 80% methanol. The yield and antioxidant activity of the mungbean extracts varied significantly (p < 0.05) as function of extraction techniques and solvents employed.

ACS Style

Farooq Anwar; Zafar Iqbal; Bushra Sultana; Shahid Iqbal; Nazamid Saari. Effects of Extraction System on antioxidant attributes of mungbean [Vigna radiata(L.) Wilczek]. International Journal of Food Properties 2013, 16, 527 -535.

AMA Style

Farooq Anwar, Zafar Iqbal, Bushra Sultana, Shahid Iqbal, Nazamid Saari. Effects of Extraction System on antioxidant attributes of mungbean [Vigna radiata(L.) Wilczek]. International Journal of Food Properties. 2013; 16 (3):527-535.

Chicago/Turabian Style

Farooq Anwar; Zafar Iqbal; Bushra Sultana; Shahid Iqbal; Nazamid Saari. 2013. "Effects of Extraction System on antioxidant attributes of mungbean [Vigna radiata(L.) Wilczek]." International Journal of Food Properties 16, no. 3: 527-535.

Journal article
Published: 20 November 2012 in International Journal of Molecular Sciences
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Quantitative structure-retention relationships (QSRRs) have successfully been developed for naturally occurring phenolic compounds in a reversed-phase liquid chromatographic (RPLC) system. A total of 1519 descriptors were calculated from the optimized structures of the molecules using MOPAC2009 and DRAGON softwares. The data set of 39 molecules was divided into training and external validation sets. For feature selection and mapping we used step-wise multiple linear regression (SMLR), unsupervised forward selection followed by step-wise multiple linear regression (UFS-SMLR) and artificial neural networks (ANN). Stable and robust models with significant predictive abilities in terms of validation statistics were obtained with negation of any chance correlation. ANN models were found better than remaining two approaches. HNar, IDM, Mp, GATS2v, DISP and 3D-MoRSE (signals 22, 28 and 32) descriptors based on van der Waals volume, electronegativity, mass and polarizability, at atomic level, were found to have significant effects on the retention times. The possible implications of these descriptors in RPLC have been discussed. All the models are proven to be quite able to predict the retention times of phenolic compounds and have shown remarkable validation, robustness, stability and predictive performance.

ACS Style

Jamshed Akbar; Shahid Iqbal; Fozia Batool; Abdul Karim; Kim Wei Chan. Predicting Retention Times of Naturally Occurring Phenolic Compounds in Reversed-Phase Liquid Chromatography: A Quantitative Structure-Retention Relationship (QSRR) Approach. International Journal of Molecular Sciences 2012, 13, 15387 -15400.

AMA Style

Jamshed Akbar, Shahid Iqbal, Fozia Batool, Abdul Karim, Kim Wei Chan. Predicting Retention Times of Naturally Occurring Phenolic Compounds in Reversed-Phase Liquid Chromatography: A Quantitative Structure-Retention Relationship (QSRR) Approach. International Journal of Molecular Sciences. 2012; 13 (12):15387-15400.

Chicago/Turabian Style

Jamshed Akbar; Shahid Iqbal; Fozia Batool; Abdul Karim; Kim Wei Chan. 2012. "Predicting Retention Times of Naturally Occurring Phenolic Compounds in Reversed-Phase Liquid Chromatography: A Quantitative Structure-Retention Relationship (QSRR) Approach." International Journal of Molecular Sciences 13, no. 12: 15387-15400.

Journal article
Published: 25 October 2012 in Molecules
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A sequential solvent extraction scheme was employed for the extraction of antioxidant compounds from kenaf (Hibiscus cannabinus L.) seeds. Yield of extracts varied widely among the solvents and was the highest for hexane extract (16.6% based on dry weight basis), while water extract exhibited the highest total phenolic content (18.78 mg GAE/g extract), total flavonoid content (2.49 mg RE/g extract), and antioxidant activities (p < 0.05). DPPH and hydroxyl radical scavenging, β-carotene bleaching, metal chelating activity, ferric thiocyanate and thiobarbituric acid reactive substances assays were employed to comprehensively assess the antioxidant potential of different solvent extracts prepared sequentially. Besides water, methanolic extract also exhibited high retardation towards the formation of hydroperoxides and thiobarbituric acid reactive substances in the total antioxidant activity tests (p < 0.05). As conclusion, water and methanol extracts of kenaf seed may potentially serve as new sources of antioxidants for food and nutraceutical applications.

ACS Style

Noordin Mohd Yusri; Kim Wei Chan; Shahid Iqbal; Maznah Ismail. Phenolic Content and Antioxidant Activity of Hibiscus cannabinus L. Seed Extracts after Sequential Solvent Extraction. Molecules 2012, 17, 12612 -12621.

AMA Style

Noordin Mohd Yusri, Kim Wei Chan, Shahid Iqbal, Maznah Ismail. Phenolic Content and Antioxidant Activity of Hibiscus cannabinus L. Seed Extracts after Sequential Solvent Extraction. Molecules. 2012; 17 (11):12612-12621.

Chicago/Turabian Style

Noordin Mohd Yusri; Kim Wei Chan; Shahid Iqbal; Maznah Ismail. 2012. "Phenolic Content and Antioxidant Activity of Hibiscus cannabinus L. Seed Extracts after Sequential Solvent Extraction." Molecules 17, no. 11: 12612-12621.

Journal article
Published: 17 September 2012 in Molecules
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This study presents the proximate and mineral composition of Peperomia pellucida L., an underexploited weed plant in Malaysia. Proximate analysis was performed using standard AOAC methods and mineral contents were determined using atomic absorption spectrometry. The results indicated Peperomia pellucida to be rich in crude protein, carbohydrate and total ash contents. The high amount of total ash (31.22%) suggests a high-value mineral composition comprising potassium, calcium and iron as the main elements. The present study inferred that Peperomia pellucida would serve as a good source of protein and energy as well as micronutrients in the form of a leafy vegetable for human consumption.

ACS Style

Der-Jiun Ooi; Shahid Iqbal; Maznah Ismail. Proximate Composition, Nutritional Attributes and Mineral Composition of Peperomia pellucida L. (Ketumpangan Air) Grown in Malaysia. Molecules 2012, 17, 11139 -11145.

AMA Style

Der-Jiun Ooi, Shahid Iqbal, Maznah Ismail. Proximate Composition, Nutritional Attributes and Mineral Composition of Peperomia pellucida L. (Ketumpangan Air) Grown in Malaysia. Molecules. 2012; 17 (9):11139-11145.

Chicago/Turabian Style

Der-Jiun Ooi; Shahid Iqbal; Maznah Ismail. 2012. "Proximate Composition, Nutritional Attributes and Mineral Composition of Peperomia pellucida L. (Ketumpangan Air) Grown in Malaysia." Molecules 17, no. 9: 11139-11145.

Journal article
Published: 03 August 2012 in International Journal of Molecular Sciences
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The neuroprotective and antioxidative effects of germinated brown rice (GBR), brown rice (BR) and commercially available γ-aminobutyric acid (GABA) against cell death induced by hydrogen peroxide (H2O2) in human neuroblastoma SH-SY5Y cells have been investigated. Results show that GBR suppressed H2O2-mediated cytotoxicity and induced G0/G1 phase cell cycle arrest in SH-SY5Y cells. Moreover, GBR reduced mitochondrial membrane potential (MMP) and prevented phosphatidylserine (PS) translocation in SH-SY5Y cells, key features of apoptosis, and subsequent cell death. GBR exhibited better neuroprotective and antioxidative activities as compared to BR and GABA. These results indicate that GBR possesses high antioxidative activities and suppressed cell death in SH-SY5Y cells by blocking the cell cycle re-entry and apoptotic mechanisms. Therefore, GBR could be developed as a value added functional food to prevent neurodegenerative diseases caused by oxidative stress and apoptosis.

ACS Style

Norsharina Ismail; Maznah Ismail; Siti Farhana Fathy; Siti Nor Asma Musa; Mustapha Umar Imam; Jhi Biau Foo; Shahid Iqbal. Neuroprotective Effects of Germinated Brown Rice against Hydrogen Peroxide Induced Cell Death in Human SH-SY5Y Cells. International Journal of Molecular Sciences 2012, 13, 9692 -9708.

AMA Style

Norsharina Ismail, Maznah Ismail, Siti Farhana Fathy, Siti Nor Asma Musa, Mustapha Umar Imam, Jhi Biau Foo, Shahid Iqbal. Neuroprotective Effects of Germinated Brown Rice against Hydrogen Peroxide Induced Cell Death in Human SH-SY5Y Cells. International Journal of Molecular Sciences. 2012; 13 (8):9692-9708.

Chicago/Turabian Style

Norsharina Ismail; Maznah Ismail; Siti Farhana Fathy; Siti Nor Asma Musa; Mustapha Umar Imam; Jhi Biau Foo; Shahid Iqbal. 2012. "Neuroprotective Effects of Germinated Brown Rice against Hydrogen Peroxide Induced Cell Death in Human SH-SY5Y Cells." International Journal of Molecular Sciences 13, no. 8: 9692-9708.

Journal article
Published: 19 July 2012 in International Journal of Molecular Sciences
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Sweet potato is known to be rich in healthful antioxidants, but the stability of its antioxidant properties under gastrointestinal pH is very much unknown. Hence, this study aimed to evaluate the changes in antioxidant properties (total contents of phenolics and flavonoids as well as antioxidant activity) of sweet potato flour (SPF) under simulated gastrointestinal pH conditions. It was found that the yield of SPF crude phenolic extract increased from 0.29 to 3.22 g/100 g SPF upon subjection to gastrointestinal pH conditions (p p in vivo digestive process.

ACS Style

Kim Wei Chan; Nicholas M. H. Khong; Shahid Iqbal; Imam Mustapha Umar; Maznah Ismail. Antioxidant Property Enhancement of Sweet Potato Flour under Simulated Gastrointestinal pH. International Journal of Molecular Sciences 2012, 13, 8987 -8997.

AMA Style

Kim Wei Chan, Nicholas M. H. Khong, Shahid Iqbal, Imam Mustapha Umar, Maznah Ismail. Antioxidant Property Enhancement of Sweet Potato Flour under Simulated Gastrointestinal pH. International Journal of Molecular Sciences. 2012; 13 (7):8987-8997.

Chicago/Turabian Style

Kim Wei Chan; Nicholas M. H. Khong; Shahid Iqbal; Imam Mustapha Umar; Maznah Ismail. 2012. "Antioxidant Property Enhancement of Sweet Potato Flour under Simulated Gastrointestinal pH." International Journal of Molecular Sciences 13, no. 7: 8987-8997.

Journal article
Published: 18 June 2012 in International Journal of Molecular Sciences
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The present study was conducted to evaluate the antioxidant properties of wheat and rice flours under simulated gastrointestinal pH condition. After subjecting the wheat and rice flour slurries to simulated gastrointestinal pH condition, both slurries were centrifuged to obtain the crude phenolic extracts for further analyses. Extraction yield, total contents of phenolic and flavonoids were determined as such (untreated) and under simulated gastrointestinal pH condition (treated). 1,1-diphenyl-2-picrylhydrazyl radical (DPPH•) scavenging activity, 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) radical cation (ABTS•+) scavenging activity, ferric reducing antioxidant power (FRAP), beta-carotene bleaching (BCB) and iron chelating activity assays were employed for the determination of antioxidant activity of the tested samples. In almost all of the assays performed, significant improvements in antioxidant properties (p

ACS Style

Kim Wei Chan; Nicholas M. H. Khong; Shahid Iqbal; Maznah Ismail. Simulated Gastrointestinal pH Condition Improves Antioxidant Properties of Wheat and Rice Flours. International Journal of Molecular Sciences 2012, 13, 7496 -7507.

AMA Style

Kim Wei Chan, Nicholas M. H. Khong, Shahid Iqbal, Maznah Ismail. Simulated Gastrointestinal pH Condition Improves Antioxidant Properties of Wheat and Rice Flours. International Journal of Molecular Sciences. 2012; 13 (6):7496-7507.

Chicago/Turabian Style

Kim Wei Chan; Nicholas M. H. Khong; Shahid Iqbal; Maznah Ismail. 2012. "Simulated Gastrointestinal pH Condition Improves Antioxidant Properties of Wheat and Rice Flours." International Journal of Molecular Sciences 13, no. 6: 7496-7507.

Comparative study
Published: 30 May 2012 in International Journal of Molecular Sciences
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In this study, leaves of three indigenous varieties of Mulberry namely, Morus alba L., Morus nigra L. and Morus rubra L. were investigated for their antioxidant potential and their proximate composition was determined. The yields of 80% methanolic extracts ranged between 8.28–13.89%. The contents of total phenolics (TPC), total flavonoids (TFC) and ascorbic acid (AA) ranged between 16.21–24.37 mg gallic acid equivalent (GAE)/g, 26.41–31.28 mg rutin equivalent (RE)/g and 0.97–1.49 mg/g, respectively. The antioxidant activity of leaf extracts was evaluated by measuring 1,1-diphenyl-2-picrylhydrazyl (DPPH•) radical scavenging actity, 2,2'-azino-bis-(3-ethylbenzthiazoline-6-sulphonic acid (ABTS•+) radical cation scavenging capacity and ferric ion reducing power and values ranged between 1.89–2.12, 6.12–9.89 and 0.56–0.97 mM Trolox equivalent/g of dried leaves, respectively. The investigated features reveal good nutritive and antioxidant attributes of all the varieties with mutually significant differences.

ACS Style

Shahid Iqbal; Umer Younas; Sirajuddin; Kim Wei Chan; Raja Adil Sarfraz; Kamal Uddin; Kamal Uddin. Proximate Composition and Antioxidant Potential of Leaves from Three Varieties of Mulberry (Morus sp.): A Comparative Study. International Journal of Molecular Sciences 2012, 13, 6651 -6664.

AMA Style

Shahid Iqbal, Umer Younas, Sirajuddin, Kim Wei Chan, Raja Adil Sarfraz, Kamal Uddin, Kamal Uddin. Proximate Composition and Antioxidant Potential of Leaves from Three Varieties of Mulberry (Morus sp.): A Comparative Study. International Journal of Molecular Sciences. 2012; 13 (6):6651-6664.

Chicago/Turabian Style

Shahid Iqbal; Umer Younas; Sirajuddin; Kim Wei Chan; Raja Adil Sarfraz; Kamal Uddin; Kamal Uddin. 2012. "Proximate Composition and Antioxidant Potential of Leaves from Three Varieties of Mulberry (Morus sp.): A Comparative Study." International Journal of Molecular Sciences 13, no. 6: 6651-6664.