Objective:To analyse the chemical composition of different extracts of Merremia borneensis(M. borneensis) by gas chromatography-mass spectrometry(GC-MS).Methods:The dried leaves powder was extracted with methanol at r...Objective:To analyse the chemical composition of different extracts of Merremia borneensis(M. borneensis) by gas chromatography-mass spectrometry(GC-MS).Methods:The dried leaves powder was extracted with methanol at room temperature by using Soxhlet extractor.Methanol crude extracts of M.borneensis were extrastel with hexane,chloroform,ethyl acetate and butanol. Results:Qualitative analyses of various organic crude extracts showed that majority of these are flavonoids,terpeniods,alkaloids and glycosides.Most of the identified compounds by GCMS are biologically important.Further the M.borneensii leaf possesses certain characteristics that can be ascribed to cultivation on a domestic plantation.Conclusions:The suitable extracts for respective compounds can be chosen on the basis of above GC-MS analysis.All the major compounds from different extracts are biologically active molecules.Thus the identification of a good number of compounds from various extracts M.borneensis might have some ecological significance.展开更多
Recent advancements in person-portable instrumentation have resulted in the potential to provide contemporaneous results through rapid in-field analyses.These technologies can be utilised in emergency response scenari...Recent advancements in person-portable instrumentation have resulted in the potential to provide contemporaneous results through rapid in-field analyses.These technologies can be utilised in emergency response scenarios to aid first responders in appropriate site risk assessment and management.Large metropolitan fires can pose great risk to human and environmental health due to the rapid release of hazardous compounds into the atmosphere.Understanding the release of these hazardous organics is critical in understanding their associated risks.Person-portable gas chromatography-mass spectrometry(GC-MS)was evaluated for its potential to provide rapid on-site analysis for real-time monitoring of hazardous organic compounds at fire scenes.Air sampling and analysis methods were developed for scenes of this nature.Controlled field testing demonstrated that the portable GC-MS was able to provide preliminary analytical results on the volatile organic compounds present in air samples collected from both active and extinguished fires.In-field results were confirmed using conventional laboratory-based air sampling and analysis procedures.The deployment of portable instrumentation could provide first responders with a rapid on-site assessment tool for the appropriate management of scenes,thereby ensuring environmental and human health is proactively protected and scientifically informed decisions are made for the provision of timely advice to stakeholders.展开更多
文摘Objective:To analyse the chemical composition of different extracts of Merremia borneensis(M. borneensis) by gas chromatography-mass spectrometry(GC-MS).Methods:The dried leaves powder was extracted with methanol at room temperature by using Soxhlet extractor.Methanol crude extracts of M.borneensis were extrastel with hexane,chloroform,ethyl acetate and butanol. Results:Qualitative analyses of various organic crude extracts showed that majority of these are flavonoids,terpeniods,alkaloids and glycosides.Most of the identified compounds by GCMS are biologically important.Further the M.borneensii leaf possesses certain characteristics that can be ascribed to cultivation on a domestic plantation.Conclusions:The suitable extracts for respective compounds can be chosen on the basis of above GC-MS analysis.All the major compounds from different extracts are biologically active molecules.Thus the identification of a good number of compounds from various extracts M.borneensis might have some ecological significance.
基金This project has been assisted by the New South Wales Government through its Environmental Trust[grant number 2015/RD/0156].
文摘Recent advancements in person-portable instrumentation have resulted in the potential to provide contemporaneous results through rapid in-field analyses.These technologies can be utilised in emergency response scenarios to aid first responders in appropriate site risk assessment and management.Large metropolitan fires can pose great risk to human and environmental health due to the rapid release of hazardous compounds into the atmosphere.Understanding the release of these hazardous organics is critical in understanding their associated risks.Person-portable gas chromatography-mass spectrometry(GC-MS)was evaluated for its potential to provide rapid on-site analysis for real-time monitoring of hazardous organic compounds at fire scenes.Air sampling and analysis methods were developed for scenes of this nature.Controlled field testing demonstrated that the portable GC-MS was able to provide preliminary analytical results on the volatile organic compounds present in air samples collected from both active and extinguished fires.In-field results were confirmed using conventional laboratory-based air sampling and analysis procedures.The deployment of portable instrumentation could provide first responders with a rapid on-site assessment tool for the appropriate management of scenes,thereby ensuring environmental and human health is proactively protected and scientifically informed decisions are made for the provision of timely advice to stakeholders.
