Objective:To determine larvicidal activity of the essential oil,hydrolat and botanical extracts derived from leaves ol Pseudocalymma alliaceum an mosquito larvae of Culex quinquefasciatus.Methods:Groups of twenty lana...Objective:To determine larvicidal activity of the essential oil,hydrolat and botanical extracts derived from leaves ol Pseudocalymma alliaceum an mosquito larvae of Culex quinquefasciatus.Methods:Groups of twenty lanae were used in the larvicidal assays.The mortality,relative growth rate,the larval and pupal duration and viability was estimated.The essential oil was analyzed by solid phase microextraction using gas chromatography coupled to mass spectrometry.Results:Essential oil at 800 ppm showed larvicidal activity at 24 h with lethal values of LC_(50) and LC_(90) of 267.33 and 493.63 ppm.The hvdrolat at 20% and 10% on 2nd stage larvae showed 100%effectiveness after 24 h.The aqueous extract at 10% had a relative growth index of 0.58.while the ethanolic and methanolic extract obtained values of 0.76 and 0.70 and control reached 0.99.Larvae treated with 10% of methanol,ethanol and aqueous extract showed a reduction in larval duration of 5.00,2.20 and 4.35 days;ethanol extract at 1% provoke decrease of 2.40 days in the development and exhibited an increment of 3.30 days when treated with 0.01%.Aqueous,ethanol and methanol extracts at 10%reduced in 6.15,3.42 and 5.57 days pupal development.The main compounds were diallyl disulfide(50.05%),diallyl sulfide(11.77%) and disulfide di-2-propenyl(10.37%).Conclusions:The study demonstrated for the first time,the larvicidal activity of the essential oil and hydrolat of Pseudocalymma alliaceum:aqueous,ethanol and methanol extracts inhibited the normal growth and development of mosquito larvae,prolonging and delaying larval and pupal duration.展开更多
玫瑰纯露在护肤领域应用广,一般常用作溶剂,使用量大、浓度高。为进行高原地区玫瑰纯露与平原地区玫瑰纯露在相应体外功效上的对比,使用分别产自西藏墨脱与安徽黄山的玫瑰纯露在较高质量浓度下进行功效对比研究。研究采用人永生化表皮...玫瑰纯露在护肤领域应用广,一般常用作溶剂,使用量大、浓度高。为进行高原地区玫瑰纯露与平原地区玫瑰纯露在相应体外功效上的对比,使用分别产自西藏墨脱与安徽黄山的玫瑰纯露在较高质量浓度下进行功效对比研究。研究采用人永生化表皮角化细胞(Ha Ca T细胞),人成纤维细胞(HSF细胞),人黑色素瘤细胞(A375细胞)作为体外模型,通过MTT法、L-DOPA氧化法、ELISA、DPPH自由基清除实验进行相应对比检测。实验发现在较高质量浓度范围内(20,40,60,80,100 g/L)高原玫瑰纯露不影响角质细胞与成纤维细胞的生长,并且高原玫瑰纯露比平原玫瑰纯露更显著的抑制黑色素细胞内酪氨酸酶活性及酪氨酸酶相关蛋白2(TRP-2)表达,并可以显著促进角质细胞丝聚蛋白(FLG)表达,而平原玫瑰纯露在高质量浓度条件下抑制了FLG蛋白的表达,两组纯露清除自由基能力均较弱。高原玫瑰纯露相较于平原玫瑰纯露高质量浓度下在相应体外功效上具有更好的安全性和抑制黑色素生物合成和促进FLG蛋白表达的作用,两组玫瑰纯露均不具备较好的抗衰老及清除自由基的能力。展开更多
基金financial support provided by National Polithecnic InstituteNational Council of Science and Technology(CONACYT),Mexico
文摘Objective:To determine larvicidal activity of the essential oil,hydrolat and botanical extracts derived from leaves ol Pseudocalymma alliaceum an mosquito larvae of Culex quinquefasciatus.Methods:Groups of twenty lanae were used in the larvicidal assays.The mortality,relative growth rate,the larval and pupal duration and viability was estimated.The essential oil was analyzed by solid phase microextraction using gas chromatography coupled to mass spectrometry.Results:Essential oil at 800 ppm showed larvicidal activity at 24 h with lethal values of LC_(50) and LC_(90) of 267.33 and 493.63 ppm.The hvdrolat at 20% and 10% on 2nd stage larvae showed 100%effectiveness after 24 h.The aqueous extract at 10% had a relative growth index of 0.58.while the ethanolic and methanolic extract obtained values of 0.76 and 0.70 and control reached 0.99.Larvae treated with 10% of methanol,ethanol and aqueous extract showed a reduction in larval duration of 5.00,2.20 and 4.35 days;ethanol extract at 1% provoke decrease of 2.40 days in the development and exhibited an increment of 3.30 days when treated with 0.01%.Aqueous,ethanol and methanol extracts at 10%reduced in 6.15,3.42 and 5.57 days pupal development.The main compounds were diallyl disulfide(50.05%),diallyl sulfide(11.77%) and disulfide di-2-propenyl(10.37%).Conclusions:The study demonstrated for the first time,the larvicidal activity of the essential oil and hydrolat of Pseudocalymma alliaceum:aqueous,ethanol and methanol extracts inhibited the normal growth and development of mosquito larvae,prolonging and delaying larval and pupal duration.
文摘玫瑰纯露在护肤领域应用广,一般常用作溶剂,使用量大、浓度高。为进行高原地区玫瑰纯露与平原地区玫瑰纯露在相应体外功效上的对比,使用分别产自西藏墨脱与安徽黄山的玫瑰纯露在较高质量浓度下进行功效对比研究。研究采用人永生化表皮角化细胞(Ha Ca T细胞),人成纤维细胞(HSF细胞),人黑色素瘤细胞(A375细胞)作为体外模型,通过MTT法、L-DOPA氧化法、ELISA、DPPH自由基清除实验进行相应对比检测。实验发现在较高质量浓度范围内(20,40,60,80,100 g/L)高原玫瑰纯露不影响角质细胞与成纤维细胞的生长,并且高原玫瑰纯露比平原玫瑰纯露更显著的抑制黑色素细胞内酪氨酸酶活性及酪氨酸酶相关蛋白2(TRP-2)表达,并可以显著促进角质细胞丝聚蛋白(FLG)表达,而平原玫瑰纯露在高质量浓度条件下抑制了FLG蛋白的表达,两组纯露清除自由基能力均较弱。高原玫瑰纯露相较于平原玫瑰纯露高质量浓度下在相应体外功效上具有更好的安全性和抑制黑色素生物合成和促进FLG蛋白表达的作用,两组玫瑰纯露均不具备较好的抗衰老及清除自由基的能力。
