Background:Vitis vinifera is universally appreciated herb(especially fruit)for their delicacy,nutrition and conventional as functional food.In the present study,we evaluated anti-hypercholesterolemic potential of Viti...Background:Vitis vinifera is universally appreciated herb(especially fruit)for their delicacy,nutrition and conventional as functional food.In the present study,we evaluated anti-hypercholesterolemic potential of Vitis vinifera red leaves extract in experimental wistar male rats.Material and methods:Qualitative and quantitative phytochemical screening of vitis vinifera methanolic extract(VVME)and vitis vinifera aqueous extract aqueous(VVAE)extract was carried out to identify the phytoconstituents.The anti-hypercholesterolemic activity was evaluated by inducing hypercholesterolemia with high cholesterol diet for 21 days in experimental animals.During the experimental periods parameters like lipid profile,liver function test,atherogenic index and histopathological studies were analysed.Results:Total tannins,total flavonoids and total phenolic contents were found in major amount in VVME.The lipid levels were significantly attenuated by different doses of VVME and VVAE.Moreover,VVME was found more effective than VVAE and histopathological results confirmed the effectiveness of VVME.Conclusion:It can be concluded that anti-hypercholesterolemic efficacy of Vitis vinifera might be due to presence of active phytoconstituents and its antioxidant efficacy.展开更多
Electrical conduction behavior of pristine and iodine doped polyetherimides （PEI） has been investigated under both transient and steady state conditions in the operating temperature range 50-200℃ at various electri...Electrical conduction behavior of pristine and iodine doped polyetherimides （PEI） has been investigated under both transient and steady state conditions in the operating temperature range 50-200℃ at various electric fields of 12-60 kV/cm. The transient currents show the hyperbolic decay character, and the decay exponent p （a measure of current decay rate） decreases with temperature （T） and doping concentration. The origin of transient currents has been attributed to the dipolar nature of carbonyl （〉C：O） groups and the ether linkages present in the main chain of PEI. The low field steady state conduction is ohmic in nature. The magnitudes of ionic jump distance （a） values do not favor an ionic type of conduction as a possible conduction mechanism in pristine as well as iodine doped PEI. The Schottky coefficients estimations do not show the possibility of Schottky type or Poole-Frenkel type conduction mechanisms in the low temperature region （〈 120℃）, however, in the high temperature region （〉 120℃） there is a certain possibility of Poole- Frenkel type conduction mechanism in both pristine and iodine doped samples. The dual slope in the lg/versus 1/T curves for iodine doped samples indicates the presence of more than one type of trapping levels.展开更多
文摘Background:Vitis vinifera is universally appreciated herb(especially fruit)for their delicacy,nutrition and conventional as functional food.In the present study,we evaluated anti-hypercholesterolemic potential of Vitis vinifera red leaves extract in experimental wistar male rats.Material and methods:Qualitative and quantitative phytochemical screening of vitis vinifera methanolic extract(VVME)and vitis vinifera aqueous extract aqueous(VVAE)extract was carried out to identify the phytoconstituents.The anti-hypercholesterolemic activity was evaluated by inducing hypercholesterolemia with high cholesterol diet for 21 days in experimental animals.During the experimental periods parameters like lipid profile,liver function test,atherogenic index and histopathological studies were analysed.Results:Total tannins,total flavonoids and total phenolic contents were found in major amount in VVME.The lipid levels were significantly attenuated by different doses of VVME and VVAE.Moreover,VVME was found more effective than VVAE and histopathological results confirmed the effectiveness of VVME.Conclusion:It can be concluded that anti-hypercholesterolemic efficacy of Vitis vinifera might be due to presence of active phytoconstituents and its antioxidant efficacy.
基金financially supported by DRDO,Government of India,New Delhi
文摘Electrical conduction behavior of pristine and iodine doped polyetherimides （PEI） has been investigated under both transient and steady state conditions in the operating temperature range 50-200℃ at various electric fields of 12-60 kV/cm. The transient currents show the hyperbolic decay character, and the decay exponent p （a measure of current decay rate） decreases with temperature （T） and doping concentration. The origin of transient currents has been attributed to the dipolar nature of carbonyl （〉C：O） groups and the ether linkages present in the main chain of PEI. The low field steady state conduction is ohmic in nature. The magnitudes of ionic jump distance （a） values do not favor an ionic type of conduction as a possible conduction mechanism in pristine as well as iodine doped PEI. The Schottky coefficients estimations do not show the possibility of Schottky type or Poole-Frenkel type conduction mechanisms in the low temperature region （〈 120℃）, however, in the high temperature region （〉 120℃） there is a certain possibility of Poole- Frenkel type conduction mechanism in both pristine and iodine doped samples. The dual slope in the lg/versus 1/T curves for iodine doped samples indicates the presence of more than one type of trapping levels.
