키틴/키토산의 이용

키틴은 버섯이나 균류의 백벽과 절족동물류의 외피나 세포벽을 형성하는 함질소 다당류이며 키토산은 이 키틴의 가수분해물이다. 키틴은 안정한 물성 때문에 용해되기 어려워 가공하기가 용이하지 않으나 키토산은 초산 수용액에 쉽게 용해된다. 키틴과 키토산은 천연 원료이기 때문에 ① 상처 치료능 ② 생분해성 ③ 항균성 ④ 항미생물성 ⑤ 보수성 ⑥ 물질 흡착능..

실크울(Silk wool)조의 신합섬 '파피나' 개발

일본의 구라레이는 thick and thin구조와 이염색성을 갖는 실크울조의 신합섬 파피나를 개발하여 94년 춘하제품부터 숙녀외의용으로 판매를 계획하고 있다. 파피나는 통상적으로 사용되는 농도의 수배에서 수십배되는 양의 특수 세라믹를 균일하게 분산시킨 폴리머 방사액을 원료로 사용한다. 방사, 연신기술 연구로 (1) 1mm이하에서 수cm 까지의 불규칙적인 간격으..

세라믹 소재 "활생면"

일본의 삼XX사에서는 드레스 셔츠 소재로 흡수속건과 방오성등 생활기능을 갖는 소재를 적극적으로 사용하고 있는데 그 하나가 천연세라믹를 포함하고 있는 「활생면」으로 고도의 기능성을 갖는 소재로서 내년 춘하제품부터 본격적으로 상품 전개를 개시하려 한다. 드레스 셔츠 분야에서는 상업세탁시 수축이 일어나지 않고 안정한 형태를 유지할 수 있는 소재 개발..

closed-boll cotton $em dash$ 2. restoration of the never-dried state by treatment with propylene oxide

in the reported experiments, never-dried and dried cotton fibers from closed bolls harvested at various stages of growth were treated with propylene oxide. both sets of treated fibers, which were tested after drying and rewetting with water, had moisture-sorption and tensile properties close to those of never-dried cotton. comparison of t..

'paper towel' sensor protects pc boards from conductive fluid spills

a simple conductive-fluid sensor made from copper screening, paper towels, a fuse and a single transistor will turn off all power to a given circuit or p/c board if an accidental spill occurs. once activated, the device will not allow power back on until the contaminated circuit is washed and dried thoroughly, the sensor is rearmed with f..

total energy model for cotton production

a practical, working computer simulation was set up for energy requirements in cotton production. forty-eight production systems were used as test models for the program and several conclusions were made on these. this successful working model can simulate any energy requirements for a given farmer's method and how a change in method will..

papers--asae winter meeting, 1979

a total of 370 papers were presented at the conference, 366 of which are indexed separately. the papers cover various aspects of agricultural engineering and related fields, including irrigation, drainage, agricultural soils, crop yield forecasts, agronomy, agrometeorology, agricultural machinery, animal science, farm buildings, solar ene..

polypropylene fibre activities in brazil

polypropylene is used extensively in brazil for a wide range of fiber based products in a variety of end-use applications. adoption of pp for such products has been helped considerably through the establishment of the country's first pp polymer plant in 1978 and additional new capacity will support further development and usage details ar..

ussr's environmental pollution observing and monitoring system

a national environmental pollution observing and monitoring service organized for the soviet union in recent years is now functioning. systematic pollution observations are made in the air of 350 cities, in 1200 inland bodies of water, and in all of the seas that wash the shores of the country; expeditionary surveys of soil pollution are ..

chip components can be flow-soldered on both sides of a board to boost density

for the first time, chip components can be flow-soldered on a printed-circuit board along with other components. this new generation of chip resistors, chip capacitors, chip diodes and chip transistors can be attached automaticlly to either or both sides of a p/c board. furthermore, the chips dramatically increase packaging density, signi..