Thermogravimetric analysis (TGA) is a thermal analysis technique that the mass of sample is measured by time and temperature changes. In this study, TGA was applied for estimating the proportion of Nylon-6,6 nanofibers in the cement paste as well as the decomposition temperature of Nylon-6,6 nanofibers. An electrospinning process was conducted for producing nanofibers and adding directly into the cement powder. The TGA results show that there was approximately 0.5 % of nanofibers in the composite pastes. Besides, the decomposition temperature of Nylon-6,6 nanofibers was clarified in the range of 300℃ to 410℃.
Since organized living cooperative associations sold their environment-friendly agricultural products directly to independent consumers in the past, the general distribution channels such as wholesalers had difficulty in handling these products. However, the ratio of distribution via wholesale channel has been gradually increased as consumption of environment-friendly agricultural products has expanded. This study is to address vitalization of wholesale distribution for environmentfriendly agricultural products by gathering previous statistical data and analysis. In addition, statistical analysis are conducted by utilizing surveys on forwarders, consumers for environment-friendly agricultural products. As a result, the products producers ship are distributed through dealers at producers sites, producers cooperatives, or food process companies, food companies, internet shopping malls, large-scale distribution companies, consumer groups such as living cooperative associations, direct outlets at consumers sites, or exports. Among the channels, the large-scale distribution companies and franchised special shops account for 47%, the general supermarkets 15.7%, and living cooperative associations 14.6% respectively. By utilizing the research results on producers and consumers, and the distribution weight by channels for environment-friendly agricultural products, the distribution channels for living cooperative associations, wholesale markets, and large scale distribution companies are compared and evaluated. As a result, the level of producers’ and consumers’ satisfaction for them is the lowest since the low selling price for producers and high distribution margins.
잎담배품질(등급별 수량분포비율)에 관여하는 개별 기상환경요인의 영향도 및 관계를 시기별로 분석한 바 그 결과는 다음과 같다. 1. 부엽 고품질인 1∼2등엽의 수량분포비율은 34.6%이고 저품질인 4∼5등엽은 40.4%이었다. 2. 품질등급별 수량분포비율의 년차변이는 5등엽에서 가장 높았고 2등엽에서 낮은 변이를 나타냈다. 3. 기상환경요인중 시기별 년차변이는 강수량과 일조시수에서 높았으며 최고기온에서 가장 낮았다. 4. 강수량은 6월 상순 > 5월 하순 > 6월 하순순으로 년차변이계수가 높았다. 5. 일조시수는 7월 하순 > 6월 하순순으로 년차변이계수가 높았다. 6. 고품질엽의 수량분포비율에 미치는 시기별 기상요인의 영향도를 보면, 가) 평균기온 : 정방향으로는 5월 하순과 중순에서 영향도가 크고 부방향으로는 5월 하순과 6월 상순에 크게 나타났다. 나) 일조시수 : 정방향으로는 6월 중순 > 6월 하순 > 5월 하순순으로 영향도가 크고 부방향으 영향도순은 5월 상순> 5월 중순이었다. 다) 강수량 : 정방향의 영향도순위는 5월 상순 > 5월 하순 > 5월 중순이고 부방향은 6월 중순과 6월 상순에서 영향도가 크게 나타았다.