The study was conducted to monitor the concentration of pesticide residues in three staple vegetables (tomato, cabbage, lettuce) collected from 12 prefectures belonging to 4 agro-ecological regions of Togo. A total of...The study was conducted to monitor the concentration of pesticide residues in three staple vegetables (tomato, cabbage, lettuce) collected from 12 prefectures belonging to 4 agro-ecological regions of Togo. A total of 150 samples of ripe tomato, cabbage and lettuce were collected from the study areas and analyzed for 20 OCPs (organochlorine pesticides) residues, which can be grouped into DDTs, Drins, Heptachlors, Chlordanes and HCHs. The data revealed that 100% of the analyzed vegetable samples were contaminated by one or more pesticide residues;83.32% and 100% were below the maximum residue limits (MRLs) set par European Union and FAO/WHO respectively whereas 16.68% were above the EU (MRLs) adopted values. Overall, cabbage contained the highest number of samples with pesticide residues above the MRLs followed by tomato, whilst none of lettuce samples contained pesticide residues above the MRLs. It is therefore proposed to perform continuous monitoring studies of pesticide residues in vegetables cultivated in Togo.展开更多
The present study was carried out to evaluate the quality of the rhizomes of Zingiber officinale and Zingiber zerumbet from different areas of Togo on the basis of their essential oil content and composition. The dry ...The present study was carried out to evaluate the quality of the rhizomes of Zingiber officinale and Zingiber zerumbet from different areas of Togo on the basis of their essential oil content and composition. The dry rhizomes were pulverised, hydrodistilled and essential oils were analysed using GC and GC/MS techniques. The results revealed that the essential oil yield of Z. zerumbet ranged from 0.75% to 1.00% and was mainly composed by Zerumbone (51.8% - 37.5%) and humulene (21.7% - 28.2%). Z. officinale essential oil yielded from 1.25% to 1.67%, with major components as zingiberene (33% - 39.9%);basibolene (12.7% - 16%), and sesquiphellandrene (13% - 14.7%).展开更多
The present study aims at valorizing two residues types of the foodless vegetable biomass which are abundant and very pollutant in Burkina Faso. To do it, first we try to identify the optimal values of chipboard elabo...The present study aims at valorizing two residues types of the foodless vegetable biomass which are abundant and very pollutant in Burkina Faso. To do it, first we try to identify the optimal values of chipboard elaboration parameters with kenaf and cotton stems by using a natural binder (the bone glue). Next we proceed to the elaboration of two panels types with optimized elaboration parameters. Besides we determine mechanical and thermal characteristics of elaborated panels with a view of an indoor thermal insulation application. Also it becomes necessary for us to determine by experimenting the thermal conductivity, Young’s modulus, Coulomb’s modulus, and the water inflation rate, taking into account some elaboration parameters on one hand and the correlation between mechanical and thermal properties on the other hand. Finally, the obtained results are compared with the panels properties values required by ANSI A 208.1-1999 standard.展开更多
文摘The study was conducted to monitor the concentration of pesticide residues in three staple vegetables (tomato, cabbage, lettuce) collected from 12 prefectures belonging to 4 agro-ecological regions of Togo. A total of 150 samples of ripe tomato, cabbage and lettuce were collected from the study areas and analyzed for 20 OCPs (organochlorine pesticides) residues, which can be grouped into DDTs, Drins, Heptachlors, Chlordanes and HCHs. The data revealed that 100% of the analyzed vegetable samples were contaminated by one or more pesticide residues;83.32% and 100% were below the maximum residue limits (MRLs) set par European Union and FAO/WHO respectively whereas 16.68% were above the EU (MRLs) adopted values. Overall, cabbage contained the highest number of samples with pesticide residues above the MRLs followed by tomato, whilst none of lettuce samples contained pesticide residues above the MRLs. It is therefore proposed to perform continuous monitoring studies of pesticide residues in vegetables cultivated in Togo.
文摘The present study was carried out to evaluate the quality of the rhizomes of Zingiber officinale and Zingiber zerumbet from different areas of Togo on the basis of their essential oil content and composition. The dry rhizomes were pulverised, hydrodistilled and essential oils were analysed using GC and GC/MS techniques. The results revealed that the essential oil yield of Z. zerumbet ranged from 0.75% to 1.00% and was mainly composed by Zerumbone (51.8% - 37.5%) and humulene (21.7% - 28.2%). Z. officinale essential oil yielded from 1.25% to 1.67%, with major components as zingiberene (33% - 39.9%);basibolene (12.7% - 16%), and sesquiphellandrene (13% - 14.7%).
文摘The present study aims at valorizing two residues types of the foodless vegetable biomass which are abundant and very pollutant in Burkina Faso. To do it, first we try to identify the optimal values of chipboard elaboration parameters with kenaf and cotton stems by using a natural binder (the bone glue). Next we proceed to the elaboration of two panels types with optimized elaboration parameters. Besides we determine mechanical and thermal characteristics of elaborated panels with a view of an indoor thermal insulation application. Also it becomes necessary for us to determine by experimenting the thermal conductivity, Young’s modulus, Coulomb’s modulus, and the water inflation rate, taking into account some elaboration parameters on one hand and the correlation between mechanical and thermal properties on the other hand. Finally, the obtained results are compared with the panels properties values required by ANSI A 208.1-1999 standard.
