In this work fibers derived from coffee</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> hulls ha</span><span style="font-f...In this work fibers derived from coffee</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> hulls ha</span><span style="font-family:Verdana;">ve</span><span style="font-family:Verdana;"> been incorporated into Linear Low Density Polyethylene (LLDPE). The influence of the filler content on </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">thermal and physicomechanical properties of the composites obtained was assessed. The results showed that the incorporation of fibers was able to improve the thermostability of LLDPE/Coffee hulls fibers;comparing the treated fiber composite with untreated fiber composites, the chemical treatment reduces by 58.3% the water absorption, while increasing the elongation and tensile strength by about 48% and 17% respectively. Moreover, due to better interfacial interaction induced by MAPE, the corresponding composite exhibited better properties compared to the untreated fiber composite. Results are indicative of the fact that both mercerization and MAPE (coupling agent) have significant positive effects on the fib</span><span style="font-family:Verdana;">er</span><span style="font-family:Verdana;">-matrix interaction in terms of adhesion, wetting and dispersion, this treatment produced a better fiber distribution and consequently a more uniform composite morphology without voids and gaps between the fibers and the matrix, allowing the possibility to use higher fiber contents (up to 30% wt.) with acceptable mechanical properties.展开更多
Background:Urogenital schistosomiasis is a parasitic infection of public health importance that affects over 112 million people worldwide.The study aimed at assessing the urogenital schistosomiasis prevalence and risk...Background:Urogenital schistosomiasis is a parasitic infection of public health importance that affects over 112 million people worldwide.The study aimed at assessing the urogenital schistosomiasis prevalence and risk factors of transmission around Mape dam suburds in Malantouen district,West,Cameroon.Methods:The study was conducted using semi-structured pretested questionnaires to collect socio-demographic and ecological data.Urine samples were also collected and used to confirm the prevalence of schistosomiasis in consented school-aged children in four primary schools between March-July 2014.Snails’samples around the dam surburbs were also collected for taxonomy characterization and species identification.Data were compiled and quality control assessed and analysed using SPSS version 17 and Epiinfo data 3.1.P<0.05 was considered statistical significance.Results:Questionnaires were administered to 229 pupils,with gender ratio of 1.04(m/f).The prevalence of schistosomiasis haematobium was 16.6%.Mambonko school site,which is the closest to the dam suburbs,registered the greatest prevalence rate of 40%.The age group beween 10-13 years was the most infected(18.3%)and boys were more infested than girls(21.0%vs.15.5%).Haematuria,urination pain,school absentiesm and poor performance were the major recorded complications in 39.5 and 26.3%males to female respectively.Infection rate gender disparity documented is still poorly understood and Bulinus truncatus collected from Mambonko suburb as potential snail intermediate host requires further studies.Conclusions:Authors advocated that schools and dam suburds sustained and innovative community-based surveillance and response targeted interventions implementation are needed to inform and support decisionmaking policy,but also in improving effective contextual behavioural communication changes and MDA improved uptake measures on national schistosomiasis control and elimination in Cameroon.展开更多
文摘In this work fibers derived from coffee</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> hulls ha</span><span style="font-family:Verdana;">ve</span><span style="font-family:Verdana;"> been incorporated into Linear Low Density Polyethylene (LLDPE). The influence of the filler content on </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">thermal and physicomechanical properties of the composites obtained was assessed. The results showed that the incorporation of fibers was able to improve the thermostability of LLDPE/Coffee hulls fibers;comparing the treated fiber composite with untreated fiber composites, the chemical treatment reduces by 58.3% the water absorption, while increasing the elongation and tensile strength by about 48% and 17% respectively. Moreover, due to better interfacial interaction induced by MAPE, the corresponding composite exhibited better properties compared to the untreated fiber composite. Results are indicative of the fact that both mercerization and MAPE (coupling agent) have significant positive effects on the fib</span><span style="font-family:Verdana;">er</span><span style="font-family:Verdana;">-matrix interaction in terms of adhesion, wetting and dispersion, this treatment produced a better fiber distribution and consequently a more uniform composite morphology without voids and gaps between the fibers and the matrix, allowing the possibility to use higher fiber contents (up to 30% wt.) with acceptable mechanical properties.
文摘Background:Urogenital schistosomiasis is a parasitic infection of public health importance that affects over 112 million people worldwide.The study aimed at assessing the urogenital schistosomiasis prevalence and risk factors of transmission around Mape dam suburds in Malantouen district,West,Cameroon.Methods:The study was conducted using semi-structured pretested questionnaires to collect socio-demographic and ecological data.Urine samples were also collected and used to confirm the prevalence of schistosomiasis in consented school-aged children in four primary schools between March-July 2014.Snails’samples around the dam surburbs were also collected for taxonomy characterization and species identification.Data were compiled and quality control assessed and analysed using SPSS version 17 and Epiinfo data 3.1.P<0.05 was considered statistical significance.Results:Questionnaires were administered to 229 pupils,with gender ratio of 1.04(m/f).The prevalence of schistosomiasis haematobium was 16.6%.Mambonko school site,which is the closest to the dam suburbs,registered the greatest prevalence rate of 40%.The age group beween 10-13 years was the most infected(18.3%)and boys were more infested than girls(21.0%vs.15.5%).Haematuria,urination pain,school absentiesm and poor performance were the major recorded complications in 39.5 and 26.3%males to female respectively.Infection rate gender disparity documented is still poorly understood and Bulinus truncatus collected from Mambonko suburb as potential snail intermediate host requires further studies.Conclusions:Authors advocated that schools and dam suburds sustained and innovative community-based surveillance and response targeted interventions implementation are needed to inform and support decisionmaking policy,but also in improving effective contextual behavioural communication changes and MDA improved uptake measures on national schistosomiasis control and elimination in Cameroon.
