GAGAN SINGH | University of Winnipeg (original) (raw)
Papers by GAGAN SINGH
Lwt - Food Science and Technology, 2011
... a, Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and ... more ... a, Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and Technology, Longowal-148 106, Punjab, India. b, Defence Food Research Laboratory, Siddhartha Nagar, Mysore, Karnataka, India. ...
Food and Chemical Toxicology, 2009
Labisia pumila (Myrsinaceae), is a popular herb among the women in Malaysia known locally as ''Ka... more Labisia pumila (Myrsinaceae), is a popular herb among the women in Malaysia known locally as ''Kacip Fatimah". Recently many nutraceutical products containing the powdered or extracted parts of the plant have become available for women's health care. However no evaluation of the effect of the repeated dosing of any herbal product of this plant had been undertaken prior to a 28-day sub-acute study presented in this report. The results showed that a dose of 50 mg/kg of an aqueous extract of L. pumila corresponded to no-adverse-effect-level (NOAEL), whereas higher doses were associated with some toxicity concerns.
Journal of Food Engineering, 2008
Drying characteristics of water chestnut were evaluated in a commercially available cabinet oven ... more Drying characteristics of water chestnut were evaluated in a commercially available cabinet oven at different air temperatures (50, 60, 70, 80 and 90°C) to compare the drying rate and to analyze the effect of different drying air temperature on rehydration properties. The product dried at 70°C had better rehydration characteristics. The rate constants of the exponential and Page's model for thin-layer drying were established by regression analysis of the experimental data which were found to be affected by drying air temperature. The rate constant (k) increased (0.254-0.940 h À1 ) with the drying air temperature. The DE value decreased while increasing the temperature with the values varied from 91.17 to 89.66. Rehydration characteristics were significantly affected by the drying air temperature and found to decrease with increase in drying air temperature.
Starch-starke, 2009
Water chestnut starch was subjected to acid modification and heat-moisture treatment. Hydrochlori... more Water chestnut starch was subjected to acid modification and heat-moisture treatment. Hydrochloric acid was used for acid modification at three different concentrations (0.25 M, 0.5 M and 1 M) for 2 h. Modifications did not alter the granule morphology. Heat-moisture treatment (HMT) resulted in slight reduction in the granular size of the starch granules. Acid modification lowered the amylose content, swelling power, water- and oil-binding capacity but improved the solubility of starch to a considerable level. Light transmittance of acid-modified (AM) starches improved significantly. A significant reduction in peak, trough, final and setback viscosity was observed by acid-thinning. In case of heat-moisture treated starch the final viscosity (Fv) was found to be even higher than the peak viscosity (Pv). Native water chestnut starch exhibited a lower onset temperature (To) and peak temperature (Tp) of gelatinization than the corresponding acid-treated starches. Starch films prepared from native starch exhibited excellent pliability, whereas those prepared from AM and HMT starches showed good tensile strength. Starch films prepared from acid-treated starches provided better puncture and tensile strength.
Journal of Medicinal Food, 2009
Allium cepa (Family Liliaceae) is a reputed Indian medicinal herb that is prescribed as an effect... more Allium cepa (Family Liliaceae) is a reputed Indian medicinal herb that is prescribed as an effective remedy for several ailments in the Ayurvedic system of medicine. The aim of this study was to evaluate its efficacy against various events responsible for Type I allergic reactions. A herbal fraction (ALC-02) from A. cepa (bulb) inhibited histamine release and attenuated intracellular calcium levels in Compound 48/80-induced rat peritoneal mast cells. It also prevented Compound 48/80-mediated systemic anaphylaxis while lowering histamine levels in plasma. ALC-02 suppressed carrageenan-induced rat paw edema. It inhibited eosinophil peroxidase activity and protein content in bronchoalveolar lavage fluid (BALF) of ovalbumin-challenged mice. In this experiment ALC-02 also caused a substantial reduction in lipid peroxidation in BALF/lung tissue and augmented superoxide dismutase activity in lung tissue. ALC-02 suppressed erythrocytic lysis caused by Triton X-100. A significant quenching of 1,1-diphenyl-2-picrylhydrazyl radical by ALC-02 was observed. The results have shown a promising anti-allergic profile of ALC-02 that could be attributed to its potential antihistaminic, anti-inflammatory, and antioxidant activities.
Starch-starke, 2009
Starch extracted from Indian water chestnut was investigated for its physicochemical characterist... more Starch extracted from Indian water chestnut was investigated for its physicochemical characteristics. The results were compared with those obtained from two commercial starches (corn and potato). The pasting properties were tested in the Rapid Visco Analyser and thermal properties with a differential scanning calorimeter. Water chestnut starch possessed higher breakdown viscosity (BV) and setback viscosity (SV) than corn and potato starches. However, the pasting temperature of water chestnut starch was not significantly different from that of corn starch. Lower ΔHgel values were obtained for water chestnut starch than for the other two starches whereas the onset, peak and conclusion temperatures of gelatinization (To, Tp and Tc) for water chestnut starch were quite comparable with corn starch. Scanning electron micrographs showed similarity in starch granule shape between water chestnut and potato starch with corn starch showing surface wrinkles on starch granule surfaces.
Lwt - Food Science and Technology, 2011
... a, Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and ... more ... a, Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and Technology, Longowal-148 106, Punjab, India. b, Defence Food Research Laboratory, Siddhartha Nagar, Mysore, Karnataka, India. ...
Food and Chemical Toxicology, 2009
Labisia pumila (Myrsinaceae), is a popular herb among the women in Malaysia known locally as ''Ka... more Labisia pumila (Myrsinaceae), is a popular herb among the women in Malaysia known locally as ''Kacip Fatimah". Recently many nutraceutical products containing the powdered or extracted parts of the plant have become available for women's health care. However no evaluation of the effect of the repeated dosing of any herbal product of this plant had been undertaken prior to a 28-day sub-acute study presented in this report. The results showed that a dose of 50 mg/kg of an aqueous extract of L. pumila corresponded to no-adverse-effect-level (NOAEL), whereas higher doses were associated with some toxicity concerns.
Journal of Food Engineering, 2008
Drying characteristics of water chestnut were evaluated in a commercially available cabinet oven ... more Drying characteristics of water chestnut were evaluated in a commercially available cabinet oven at different air temperatures (50, 60, 70, 80 and 90°C) to compare the drying rate and to analyze the effect of different drying air temperature on rehydration properties. The product dried at 70°C had better rehydration characteristics. The rate constants of the exponential and Page's model for thin-layer drying were established by regression analysis of the experimental data which were found to be affected by drying air temperature. The rate constant (k) increased (0.254-0.940 h À1 ) with the drying air temperature. The DE value decreased while increasing the temperature with the values varied from 91.17 to 89.66. Rehydration characteristics were significantly affected by the drying air temperature and found to decrease with increase in drying air temperature.
Starch-starke, 2009
Water chestnut starch was subjected to acid modification and heat-moisture treatment. Hydrochlori... more Water chestnut starch was subjected to acid modification and heat-moisture treatment. Hydrochloric acid was used for acid modification at three different concentrations (0.25 M, 0.5 M and 1 M) for 2 h. Modifications did not alter the granule morphology. Heat-moisture treatment (HMT) resulted in slight reduction in the granular size of the starch granules. Acid modification lowered the amylose content, swelling power, water- and oil-binding capacity but improved the solubility of starch to a considerable level. Light transmittance of acid-modified (AM) starches improved significantly. A significant reduction in peak, trough, final and setback viscosity was observed by acid-thinning. In case of heat-moisture treated starch the final viscosity (Fv) was found to be even higher than the peak viscosity (Pv). Native water chestnut starch exhibited a lower onset temperature (To) and peak temperature (Tp) of gelatinization than the corresponding acid-treated starches. Starch films prepared from native starch exhibited excellent pliability, whereas those prepared from AM and HMT starches showed good tensile strength. Starch films prepared from acid-treated starches provided better puncture and tensile strength.
Journal of Medicinal Food, 2009
Allium cepa (Family Liliaceae) is a reputed Indian medicinal herb that is prescribed as an effect... more Allium cepa (Family Liliaceae) is a reputed Indian medicinal herb that is prescribed as an effective remedy for several ailments in the Ayurvedic system of medicine. The aim of this study was to evaluate its efficacy against various events responsible for Type I allergic reactions. A herbal fraction (ALC-02) from A. cepa (bulb) inhibited histamine release and attenuated intracellular calcium levels in Compound 48/80-induced rat peritoneal mast cells. It also prevented Compound 48/80-mediated systemic anaphylaxis while lowering histamine levels in plasma. ALC-02 suppressed carrageenan-induced rat paw edema. It inhibited eosinophil peroxidase activity and protein content in bronchoalveolar lavage fluid (BALF) of ovalbumin-challenged mice. In this experiment ALC-02 also caused a substantial reduction in lipid peroxidation in BALF/lung tissue and augmented superoxide dismutase activity in lung tissue. ALC-02 suppressed erythrocytic lysis caused by Triton X-100. A significant quenching of 1,1-diphenyl-2-picrylhydrazyl radical by ALC-02 was observed. The results have shown a promising anti-allergic profile of ALC-02 that could be attributed to its potential antihistaminic, anti-inflammatory, and antioxidant activities.
Starch-starke, 2009
Starch extracted from Indian water chestnut was investigated for its physicochemical characterist... more Starch extracted from Indian water chestnut was investigated for its physicochemical characteristics. The results were compared with those obtained from two commercial starches (corn and potato). The pasting properties were tested in the Rapid Visco Analyser and thermal properties with a differential scanning calorimeter. Water chestnut starch possessed higher breakdown viscosity (BV) and setback viscosity (SV) than corn and potato starches. However, the pasting temperature of water chestnut starch was not significantly different from that of corn starch. Lower ΔHgel values were obtained for water chestnut starch than for the other two starches whereas the onset, peak and conclusion temperatures of gelatinization (To, Tp and Tc) for water chestnut starch were quite comparable with corn starch. Scanning electron micrographs showed similarity in starch granule shape between water chestnut and potato starch with corn starch showing surface wrinkles on starch granule surfaces.