• 대한가정학회지
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• 제19권2호
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• pp.135-141
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• 1981

This study was conducted to survey the end-use properties of the commercial men's socks. Date were obtained from 16 samples of men's socks gathered from department store, markets, specialty chain and variety store in street. Stretchness, performance of rib top, fiber contents, strength (abrasion and bursting), pilling properties and color fastness of socks tested in this study were as follows. 1. Stretchness of socks was sufficient but elongation of rib top was insufficient, therefore these facts are getting to become problem to consumers. 2. Fiber contents of samples were not in accord with the labelled item and criteria of Textile Fiber Product Identification Act. 3. Strength and pilling properties were vaious in according to fiber contents of socks. Socks blended of synthetic fibers were superior to that pure natural fibers in strength but not in pilling. 4. Color fastness to perspiration and rubbing were sufficient on the whole, but fastness to laundering in stain were very insufficient.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -3
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• pp.1398-1400
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• 2002

A new PLF-BLU (Plastic Light Fiber-Back Light Unit) using side glowing light fiber rods array for the 42" LCD TV display has been evelopedd. The light fibers were 14mm in diameter and 50cm long pure transparent acrylic rods of 1.49 refractive index. Fine seratees were made on the flat side of rod. extremely bright incandscent light from lamp fed into the fiber si scattered at scratches then emerges through the surface of rod. A typical PLF-BLU system consists of 24 PLFs produced side glow of brightness of 4,500cd/㎡ to 6,500cd/㎡. New PLF-BLU is proved to be a BLU of rigid, bright, no heat generation, and low power consumption, hence a prospective BLU system for very and/or ultra large size TVs. A new LED-PLF-BLU system considered to be a revolutionary to break-through of the BLU technologies has also been developed, and is decribed briefly.

• Advanced Composite Materials
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• 제16권2호
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• pp.83-94
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• 2007

Woven sisal textile fiber reinforced composites were used to evaluate fracture toughness, tensile and three-point bending. The water absorption testing of all specimens was repeated five times in this study. All specimens were immersed in pure water during 9 days at room temperature, and dried in 1 day at $50^{\circ}C$. Two kinds of polymer matrices such as epoxy and vinyl-ester were used. Fractured surfaces were taken to study the failure mechanism and fiber/matrix interfacial adhesion. It is shown that it can be enhanced to improve their mechanical performance to reveal the relationship between fracture toughness and water absorption fatigue according to different polymer matrices. Water uptake of the epoxy composites was found to increase with cycle times. Mechanical properties are dramatically affected by the water absorption cycles. Water-absorbed samples showed poor mechanical properties, such as lower values of maximum strength and extreme elongation. The $K_{IC}$ values demonstrated a decrease in inclination with increasing cyclic times of wetting and drying for the epoxy and vinyl-ester.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1996년도 춘계학술발표회 논문집
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• pp.47-52
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• 1996

PP-PHE blends were prepared by mechanical blending using relatively high moecular weight polyhydrozyether(PHE) and popypropylene polymers. PP-PHE blends were prepared and characterized for the purpose of obtaining a dycable PP fibers with the composition of less than 10 wt.% of PHE. 1)yeable PP fibers were acquired through the melt spinning of the PP-PHE blend of comprising less than 10 wt.% of PHE. The resultant fibers had tensile strength of 2~3 g/d, elongation of 330~600%, initial modulus of 22~46 g/d and yield stress of 1.0 g/d, and exhibited markedly improved dyeing ability such as higher absorbance, higher dye adsorption and deeper shade than those of pure PP fiber.

• Asian-Australasian Journal of Animal Sciences
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• 제22권1호
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• pp.131-138
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• 2009

Among rumen microbes, bacteria play important roles in the biological degradation of plant fiber due to their large biomass and high activity. To maximize the utilization of fiber components such as cellulose and hemicellulose by ruminant animals, the ecology and functions of rumen bacteria should be understood in detail. Recent genome sequencing analyses of representative fibrolytic bacterial species revealed that the number and variety of enzymes for plant fiber digestion clearly differ between Fibrobacter succinogenes and Ruminococcus flavefaciens. Therefore, the mechanism of plant fiber digestion is also thought to differ between these two species. Ecology of individual fibrolytic bacterial species has been investigated using pure cultures and electron microscopy. Recent advances in molecular biology techniques complement the disadvantages of conventional techniques and allow accurate evaluation of the ecology of specific bacteria in mixed culture, even in situ and in vivo. Molecular monitoring of fibrolytic bacterial species in the rumen indicated the predominance of F. succinogenes. Nutritive interactions between fibrolytic and non-fibrolytic bacteria are important in maintaining and promoting fibrolytic activity, mainly in terms of crossfeeding of metabolites. Recent 16S rDNA-based analyses suggest that presently recognized fibrolytic species such as F. succinogenes and two Ruminococcus species with fibrolytic activity may represent only a small proportion of the total fibrolytic population and that uncultured bacteria may be responsible for fiber digestion in the rumen. Therefore, characterization of these unidentified bacteria is important to fully understand the physiology and ecology of fiber digestion. To achieve this, a combination of conventional and modern techniques could be useful.

• 생명과학회지
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• 제12권5호
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• pp.584-588
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• 2002

Apergillus niger LK의 epoxide hydrolase 활성을 이용하여 chiral styrene oxide를 제조할 수 있는 hollow-fiber 반응기 기반의 비대칭 분할 시스템을 개발하였다. 라세믹 styrene oxide 기질을 dodecane 유기용매에 용해시켜 hollow-fiber 반응기의 lumen 부위로 공급하였으며, 생촉매인 A. niger LK 미세분말은 shell 부위로 공급함으로써 막 표면에서 비대칭 분할 반응을 수행하였다. 반응 산물로 생성되는 phenyl-1,2-ethandiol에 의한 epoxide hydrolase 활성 저해효과를 감소시키기 위하여 2번째 hollow-fiber 반응기에서 완충용액을 이용하여 diol을 추출하여 제거시켰다. 2성분 용매를 사용한 cascade형 hollow-fiber 반응기 시스템을 이용하여 광학적으로 순수한 (ee > 99%) (5)-styrene oxide를 19.5% (이론 수율 대비 39%)의 수율로 얻을 수 있었다.

• 한국의류산업학회지
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• 제22권4호
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• pp.523-533
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• 2020

Previous studies are used to examine cellulose content, degumming period, fiber quality, production yield, production cost, development limit of fiber according to physical, chemical, and microbial degumming methods. Three types of degumming methods are used to measure surface condition after degumming, necessity of additional degumming and degree of impurity removal. First, previous studies confirmed that the microbial degumming method is superior in terms of cellulose content, fiber quality, production yield, production cost, and fiber development possibility. Second, surface condition and the necessity of additional degumming were analyzed by SEM. The black skin binding material was removed in the case of the Sangnangyi and chemical degumming; however, it was insufficient and further degumming was required. Skin fiber binding material was removed in the case of microbial degumming and the surface was cleanest after degumming; in addition, most showed the form of yarn decomposition. The FT-IR spectrum determined the degree of removal of impurities and showed that it can utilize inherent physical properties as the best degumming method. The degree of removal of pectin and lignin by microbial degumming was cleanest with hemicellulose also reduced by microbial degumming.

• 멤브레인
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• 제4권4호
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• pp.197-204
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• 1994

본 연구에서는 hollow fiber 막모듈을 통한 순수 $CH_4,\;CO_2$기체와 $CH_4/CO_2$ 혼합기체의 투과 특성을 살펴 보고, 이를 모사값과 비교하여 보았다. 순수 기체의 투고율은 온도에 따라 Arrhenius type으로 증가하였으며, 활성화에너지는 $CO_2$는 6.61kJ/mol, $CH_4$는 25.26kJ/mol로 나타났다. 혼합기체의 투과에 있어서 투과부의 유량과 $CO_2$ 조성, 그리고 배제부의 $CH_4$조성은 cut의 증가에 따라 증가하였다. 분리인자는 5~20atm의 압력과 cut이 20으로 고정된 상태에서 20~40의 범위에 있었으며, 압력이 증가하고 온도가 감소할수록 증가하는 경향을 나타내었다. 실험결과와 모사결과는 투과부 유량과 $CO_2$조성의 경우 8% 이내에서, 배제부의 $CH_4$조성의 경우 15% 이내에서 일치하였다.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2006년도 춘계학술발표회 논문집
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• pp.87-89
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• 2006

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2007년도 추계학술발표회
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• pp.19-20
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• 2007