A new isopimarane diterpene, isopimar-15-en-3 beta,8 beta,20-triol, was isolated from Nepeta prattii. Its structure was elucidated by spectral methods (EIMS, 1D and 2D NMR).
Objective:To investigate the larvicidai activity of essential oil and methanol extract of the Nepeta menthoides（N.menthoides） against main malaria vector,Anopheles stephensi（An. stephensi）.Methods:The essential oi...Objective:To investigate the larvicidai activity of essential oil and methanol extract of the Nepeta menthoides（N.menthoides） against main malaria vector,Anopheles stephensi（An. stephensi）.Methods:The essential oil of planl was obtained by Clevenger type apparatus and the methanol extract was supplied with Percolation method,larvicidai activity was tested by WHO method.Twenty five fourth-instar larvae of An.stephensi were used in the larvicidai assay and four replicates were tested for each concentration.Five different concentrations of the oil and extract were tested for calculation of LC<sub>50</sub> and LC<sub>50</sub> values.Results:The LC<sub>50</sub> and LC<sub>90</sub> values were determined by probit analysis.IC<sub>50</sub> was 69.5 and 234.3 ppm and LC<sub>50</sub> was 175.5 and 419.9 ppm for the extract and essential oil respectively.Conclusions:According to the results of this study methanolic extract of plant exhibited more larvicidai activity than essential oil.This could be useful for investigation of new natural larvicidai compounds.展开更多
Acinetobacter baumannii is among the common nosocomial infections microorganisms in the Intensive Care Unit (ICU). Antimicrobial resistance (AMR) is one of the major significant concerns in developing nations due to e...Acinetobacter baumannii is among the common nosocomial infections microorganisms in the Intensive Care Unit (ICU). Antimicrobial resistance (AMR) is one of the major significant concerns in developing nations due to either over-use or inadequate use of antimicrobial agents. The purpose of this study was to emphasize the potential antimicrobial activity of Nepeta cataria and Basella alba against nosocomial diseases caused by Acinetobacter baumannii. Nepeta cataria and Basella alba leaves were collected from Oldonyo Sabuk National Park and Botanical garden JKUAT respectively. The leaves were dried under shade at room temperature for thirty days. After methanolic and aqueous plant extraction, the percentage yield was determined, and the extracts were subjected to toxicity testing using brine shrimp eggs and preliminary phytochemical screening. The results recorded from this study demonstrated that 70% methanolic extract of Nepeta cataria and Basella alba had greater antimicrobial effect against Acinetobacter baumannii than aqueous extracts. Nepeta cataria extracts showed greater antimicrobial effect than Basella alba extracts. The methanolic plant extracts had MIC values 60 mg/ml when tested against Acinetobacter baumannii. The phytochemical screening showed the presence of various phytochemical constituents from the methanolic and aqueous extraction of Nepeta cataria and Basella alba. The methanolic plant extracts revealed more phytochemicals as compared to aqueous extracts. More phytochemicals were detected from Nepeta cataria than Basella alba plant extracts.展开更多
文摘A new isopimarane diterpene, isopimar-15-en-3 beta,8 beta,20-triol, was isolated from Nepeta prattii. Its structure was elucidated by spectral methods (EIMS, 1D and 2D NMR).
基金financially supported by Tehran University of Medical Sciences
文摘Objective:To investigate the larvicidai activity of essential oil and methanol extract of the Nepeta menthoides（N.menthoides） against main malaria vector,Anopheles stephensi（An. stephensi）.Methods:The essential oil of planl was obtained by Clevenger type apparatus and the methanol extract was supplied with Percolation method,larvicidai activity was tested by WHO method.Twenty five fourth-instar larvae of An.stephensi were used in the larvicidai assay and four replicates were tested for each concentration.Five different concentrations of the oil and extract were tested for calculation of LC<sub>50</sub> and LC<sub>50</sub> values.Results:The LC<sub>50</sub> and LC<sub>90</sub> values were determined by probit analysis.IC<sub>50</sub> was 69.5 and 234.3 ppm and LC<sub>50</sub> was 175.5 and 419.9 ppm for the extract and essential oil respectively.Conclusions:According to the results of this study methanolic extract of plant exhibited more larvicidai activity than essential oil.This could be useful for investigation of new natural larvicidai compounds.
文摘Acinetobacter baumannii is among the common nosocomial infections microorganisms in the Intensive Care Unit (ICU). Antimicrobial resistance (AMR) is one of the major significant concerns in developing nations due to either over-use or inadequate use of antimicrobial agents. The purpose of this study was to emphasize the potential antimicrobial activity of Nepeta cataria and Basella alba against nosocomial diseases caused by Acinetobacter baumannii. Nepeta cataria and Basella alba leaves were collected from Oldonyo Sabuk National Park and Botanical garden JKUAT respectively. The leaves were dried under shade at room temperature for thirty days. After methanolic and aqueous plant extraction, the percentage yield was determined, and the extracts were subjected to toxicity testing using brine shrimp eggs and preliminary phytochemical screening. The results recorded from this study demonstrated that 70% methanolic extract of Nepeta cataria and Basella alba had greater antimicrobial effect against Acinetobacter baumannii than aqueous extracts. Nepeta cataria extracts showed greater antimicrobial effect than Basella alba extracts. The methanolic plant extracts had MIC values 60 mg/ml when tested against Acinetobacter baumannii. The phytochemical screening showed the presence of various phytochemical constituents from the methanolic and aqueous extraction of Nepeta cataria and Basella alba. The methanolic plant extracts revealed more phytochemicals as compared to aqueous extracts. More phytochemicals were detected from Nepeta cataria than Basella alba plant extracts.
