Portulaca oleracea(P.oleracea)is a traditional Chinese herbal that has the effects of soothing the liver and clearing collaterals,strengthening the spleen and stomach,moistening the intestines and detoxifying.With the...Portulaca oleracea(P.oleracea)is a traditional Chinese herbal that has the effects of soothing the liver and clearing collaterals,strengthening the spleen and stomach,moistening the intestines and detoxifying.With the development of the pharmaceutical industry,the medicinal value of P.oleracea is becoming increasingly prominent.It is commonly used in clinical practice for clearing heat and detoxifying,inhibiting bacteria,preventing and treating diseases such as hypertension,coronary heart disease,and cerebral infarction,indicating its broad application prospects.This study reviews the chemical components and pharmacological activities of P.oleracea in recent decades.展开更多
Objective: To study the effects of Portulaca oler acea, a Chinese medicinal herb, on insulin resistance in rats with type 2 diabet es mellitus (T2DM). Methods: Experimental model of T2DM was established by injection o...Objective: To study the effects of Portulaca oler acea, a Chinese medicinal herb, on insulin resistance in rats with type 2 diabet es mellitus (T2DM). Methods: Experimental model of T2DM was established by injection of streptozotocin (25mg/kg) and feeding with high calorie forage. The effects o f Portulaca oleracea on oral glucose tolerance, serum levels of insulin, triglyc eride, total cholesterol, high density lipoproteins cholesterol and free f atty acids, and insulin sensitivity index were all observed. Results: Portulaca oleracea could reduce the body weight, improve the impaired glucose tolerance and lipid metabolism, decrease serum free fatty acids, attenuate hyperinsulinemia and elevate insulin sensitivity. Conclusion: Portulaca oleracea could improve insulin resistance i n rats with T2DM, and the mechanism might be related to its actions in improving lipid metabolism and decreasing free fatty acids.展开更多
With Portulaca oleracea L. as an experimental material, its total DNA was extracted by the improved CTAB method, the ISSR-PCR primers were screened, and the ISSR-PCR reaction system and reaction conditions for P. oler...With Portulaca oleracea L. as an experimental material, its total DNA was extracted by the improved CTAB method, the ISSR-PCR primers were screened, and the ISSR-PCR reaction system and reaction conditions for P. oleracea were Optimized. The results showed that there were 8 primers suitable for ISSR-PCR of P. oleracea. The optimal reaction system had a volume of 25 μl, including 2 x Taq Platinum PCR Master Mix 12.5 μl, primer 2 μl, ddH20 9.5 μl, and DNA template 1μl. The optimized ISSR-PCR of P. oleracea was started with pre-denaturation at 94 ℃ for 360 s, followed by 30 cycles of denaturation at 94 ℃ for 60 s, annealing at 54 ℃ for 60 s and extension at 72 ℃ for 90 s, and completed by extension at 72 ℃ for 300 s.展开更多
Portulaca oleracea leaves are tested as an agriculture adsorbent material for reducing Pb(II) from aqueous solutions. The pH of solution, adsorbent dose, shaking speed and particles size of adsorbent were constants at...Portulaca oleracea leaves are tested as an agriculture adsorbent material for reducing Pb(II) from aqueous solutions. The pH of solution, adsorbent dose, shaking speed and particles size of adsorbent were constants at all adsorption experiments. Effects of contact time on adsorption capacity of Pb(II) onto Portulaca oleracea leaves were studied. The adsorption capacity increased as the contact time increased and reached equilibrium at one hour. Kinetic models including a first-order, pseudo-second-order and intra-particle diffusion equations were selected to follow the adsorption process. The process follows a pseudo-second-order kinetic and the intra-particle diffusion is the main step to interpret the mechanism of adsorption. Langmuir, Freundlich and Dubinin-Radush Kevich (D-R) isotherm models were applied to describe adsorption equilibrium data. Results proved that the Langmuir isotherm model gave an acceptable fit to the experimental data more than Freundlich isotherm model. Maximum adsorption capacities obtained were 192.3, 333.3 and 434 mg/g at 295, 303 and 310 K, respectively. According to D-R isotherm data, the adsorption process is classified as physical adsorption. Thermodynamically, the adsorption process is non spontaneous, endothermic and random in nature.展开更多
基金This work was financially supported by National Nature Science Foundation of China(81973284)Scientific Research Foundation of the Education Department of Liaoning Province(LJKZ0944).
文摘Portulaca oleracea(P.oleracea)is a traditional Chinese herbal that has the effects of soothing the liver and clearing collaterals,strengthening the spleen and stomach,moistening the intestines and detoxifying.With the development of the pharmaceutical industry,the medicinal value of P.oleracea is becoming increasingly prominent.It is commonly used in clinical practice for clearing heat and detoxifying,inhibiting bacteria,preventing and treating diseases such as hypertension,coronary heart disease,and cerebral infarction,indicating its broad application prospects.This study reviews the chemical components and pharmacological activities of P.oleracea in recent decades.
基金Financially supported by Education Ministry of China (Gr ant No. 1998-679)
文摘Objective: To study the effects of Portulaca oler acea, a Chinese medicinal herb, on insulin resistance in rats with type 2 diabet es mellitus (T2DM). Methods: Experimental model of T2DM was established by injection of streptozotocin (25mg/kg) and feeding with high calorie forage. The effects o f Portulaca oleracea on oral glucose tolerance, serum levels of insulin, triglyc eride, total cholesterol, high density lipoproteins cholesterol and free f atty acids, and insulin sensitivity index were all observed. Results: Portulaca oleracea could reduce the body weight, improve the impaired glucose tolerance and lipid metabolism, decrease serum free fatty acids, attenuate hyperinsulinemia and elevate insulin sensitivity. Conclusion: Portulaca oleracea could improve insulin resistance i n rats with T2DM, and the mechanism might be related to its actions in improving lipid metabolism and decreasing free fatty acids.
文摘With Portulaca oleracea L. as an experimental material, its total DNA was extracted by the improved CTAB method, the ISSR-PCR primers were screened, and the ISSR-PCR reaction system and reaction conditions for P. oleracea were Optimized. The results showed that there were 8 primers suitable for ISSR-PCR of P. oleracea. The optimal reaction system had a volume of 25 μl, including 2 x Taq Platinum PCR Master Mix 12.5 μl, primer 2 μl, ddH20 9.5 μl, and DNA template 1μl. The optimized ISSR-PCR of P. oleracea was started with pre-denaturation at 94 ℃ for 360 s, followed by 30 cycles of denaturation at 94 ℃ for 60 s, annealing at 54 ℃ for 60 s and extension at 72 ℃ for 90 s, and completed by extension at 72 ℃ for 300 s.
文摘Portulaca oleracea leaves are tested as an agriculture adsorbent material for reducing Pb(II) from aqueous solutions. The pH of solution, adsorbent dose, shaking speed and particles size of adsorbent were constants at all adsorption experiments. Effects of contact time on adsorption capacity of Pb(II) onto Portulaca oleracea leaves were studied. The adsorption capacity increased as the contact time increased and reached equilibrium at one hour. Kinetic models including a first-order, pseudo-second-order and intra-particle diffusion equations were selected to follow the adsorption process. The process follows a pseudo-second-order kinetic and the intra-particle diffusion is the main step to interpret the mechanism of adsorption. Langmuir, Freundlich and Dubinin-Radush Kevich (D-R) isotherm models were applied to describe adsorption equilibrium data. Results proved that the Langmuir isotherm model gave an acceptable fit to the experimental data more than Freundlich isotherm model. Maximum adsorption capacities obtained were 192.3, 333.3 and 434 mg/g at 295, 303 and 310 K, respectively. According to D-R isotherm data, the adsorption process is classified as physical adsorption. Thermodynamically, the adsorption process is non spontaneous, endothermic and random in nature.
