• Title/Summary/Keyword: Fiber Composition

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Effect of Dietary Fiber Sources on the Composition of Intestinal Microflora in Rats (주요 식이섬유질원이 흰쥐의 장내균총조성에 미치는 영향)

  • 이현아
    • Journal of Nutrition and Health
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    • v.27 no.10
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    • pp.988-995
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    • 1994
  • This study was performed to investigate the influence of various dietary fiber sources(rice bran, Chinese cabbage, radish, apple, laver, sea mustard) on the intestinal microflora in rats. Eight groups of rats were fed each experimental diets containing 5% of total dietary fiber for 4 weeks. Total viable counts and the numbers of Bifidobacterium, Lactobacillus, Clostridium, E. coli and Staphylococcus were determined by nonselective medium and various selective media. The number of Bifidobacterium(p<0.01) was higher in the apple and sea mustard groups than those in the other groups and the number of Lactobacillus(p<0.01) was lower in the radish group. A decrease in the intestinal population of clostridium was shown in the sea mustard group. The E. coli(p<0.01) and Staphylococcus(p<0.01) populations decreased in the apple group compared with other groups. These findings suggest that the apple fiber and sea mustard fiber are effective in improving intestinal flora of rats.

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ENGINEERING PROPERTIES OF NATURAL FIBER USED NONWOVEN GEOTEXTILES (천연섬유 부직포 지오텍스타일의 공학적 특성)

  • Jeon, H.Y.;Jang, Y.S.;Lee, K.W.
    • Proceedings of the Korean Geotechical Society Conference
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    • 2008.03a
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    • pp.267-272
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    • 2008
  • The purpose of this study is to improve the environmental applicability of nonwovens by using special composition. Polypropylene spunbonded and needle punched nonwovens which have the lower cost than polyester nonwovens were used as the raw materials to manufacture the natural fiber used nonwoven geotextiles. These geotextiles were made by use of the thermal bonding methods and composed of jute(or flax)/polypropylene staple fiber blends were obtained in consideration of environmental application. Finally, the engineering properties of natural fiber used nonwoven geotextiles were investigated as eco-friendly materials.

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the Effect of Steel Fiber on the Tensile Strength of the High Performance Steel Fiber Reinforced Cementitious Composites (초세립 미립자로 구성된 고성능 SFRC에서 강섬유의 혼입에 따른 인장강도의 변화)

  • Kang, Su-Tae;Koh, Kyung-Taek;Ryu, Gum-Sung;Kim, Sung-Wook;Lee, Jang-Hwa
    • Proceedings of the Korea Concrete Institute Conference
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    • 2004.11a
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    • pp.573-576
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    • 2004
  • High performance SFRC composed of mira-sized ultra fine particles is characterized by high strength, high ductility and excellent durability. therefore many researches about materials based on new composition like this are performed recently. many researchers have reported that adding steel fiber to concrete improved its tensile and flexural strength significantly. the main objective of this research is to examine the effect of adding steel fiber on the tensile strength of high performance SFRC. variables considered in this study are w/c ratio and fiber volume fraction.

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Tribological Properties of the Aluminum Short fiber and glass fiber Reinforced Tin-Bronze Matrix Composites (알루미나 단섬유 및 유리섬유 보강 청동기지 복합재의 마모특성 연구)

  • 황순홍;안병길;이범주;최웅수;허무영
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1996.04b
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    • pp.13-19
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    • 1996
  • The tribological properties of the aluminum short fiber and glass fiber reinforced tin-bronze matrix composites manufactured by vacuum hot pressing was studied. The effect of the composition and the relative density on the wear properties was examined by a reciprocal type tribo-test machine. The results were discussed by the observation of the microstructure of sintered specimen and worn surface observation using SEM and EDS. Addition of the fibers led to the wear resistance since the metal matrix was reinforced by the fibers. The reinforcement of the fiber seemed to be stronger as the distribution of the fibers was more uniform. Graphite also reduce the wear loss. The pores in the sintered composites seemed to play an important role to improve the wear resistance since the pores provide the places where the solid lubricants locate.

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Study on Microstructure and Electrical Properties of Cement Mortar Containing Conductive Fibers (전도성 섬유가 함유된 시멘트 모르타르의 미세구조 및 전기적 특성 연구)

  • Park, Jong-Gun;Seo, Dong-Ju;Lim, Doo-Yeol;Lee, Yu-Jae;Heo, Gwang-Hee
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.26 no.3
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    • pp.72-83
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    • 2022
  • This paper studied the effect on the microstructure, electrical properties, and compressive strength of cement mortar containing carbon fiber (CF) and steel fiber (SF), which are conductive materials. The resistivity of conductive fiber-reinforced cement mortar (FRCM) was measured using the 4-probe method, and the compressive strength was measured based on the compression test. Their performance was compared and reviewed with plain mortar (PM). Furthermore, the surface shape and composition of the fracture surface of the conductive FRCM were analyzed using a scanning electron microscope (SEM) and an energy disperse X-ray spectrometer (EDS). The results showed that the resistivity gradually increased as the curing time increased in all specimens, whereas the resistivity decreased significantly as the fiber volume fraction increased. Adding steel fibers up to 1.25% did not affect the resistivity of cement mortar considerably. On the contrast, the resistivity of carbon fiber was somewhat decreased even at low contents (ie, 0.1 to 0.3%), and thereafter, it was significantly decreased. The percolation threshold of the conductive CFRCM containing CF used in this experiment was 0.4%, and it is judged to be the optimum carbon fiber dosage to maximize the conductive effect while maintaining the compressive strength performance as much as possible. For the surface shape and composition analysis of conductive FRCM, the fracture surface was observed through SEM-EDS. These results are considered to be very useful in establishing the microstructure mechanism of reinforcing fibers in cement mortars.

Physico-chemical Properties of Chicken Meat Emulsion Systems with Dietary Fiber Extracted from Makgeolli Lees

  • Choi, Yun-Sang;Park, Kwoan-Sik;Choi, Ji-Hun;Kim, Hyun-Wook;Song, Dong-Heon;Kim, Jin-Man;Chung, Hai-Jung;Kim, Cheon-Jei
    • Food Science of Animal Resources
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    • v.30 no.6
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    • pp.910-917
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    • 2010
  • Makgeolli lees is a jigaemi by product produced by makgeolli brew processing. Jigaemi has high fiber content and therefore can potentially be used in the development of foods rich in dietary fiber. The effects of makgeolli lees fibers on the composition and physico-chemical properties of chicken emulsion systems were studied. The moisture and ash contents, yellowness, and viscosity of chicken meat emulsion systems with makgeolli lees fiber were all higher than those of control. Moreover, chicken batters supplemented with makgeolli lees fiber were characterized by lower cooking loss and better emulsion stability. Chicken emulsion systems with makgeolli lees fiber also had improved emulsion stability and emulsion viscosity, and the best results were obtained with meat batter containing 2% makgeolli lees fiber.

A Study on the Improvement of Workability of High Strength Steed Fiber Reinforced Cementitious Composites (고강도 강섬유 보강 시멘트 복합체의 워커빌리티 향상에 관한 연구)

  • Koh, Kyung-Taeg;Kang, Su-Tae;Park, Jung-Jun;Ryu, Gum-Sung
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.8 no.3
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    • pp.141-148
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    • 2004
  • This paper present the experimental research investigating the influence of material factors such as a type or amount of superplasticizer, velocity agent, mineral admixture and steel fiber on the workability of high strength steel fiber reinforced cementitious composites. As for the test results, it was found that the workability of high strength steel fiber reinforced cementitious composites can be improved when the material factors were matched properly in amount and composition. Furthermore, it was shown that the smaller value of the aspect ratio of steel fiber improved the workability of fiber reinforced cementitious composites. And the steel fiber reinforced cementitious composites with better workability showed the enhanced compressive strength and flexural strength.

Effect of Dietary Fiber Level on Meat Quality in Colored Broiler (식이섬유 수준이 유색육용계의 육질에 미치는 영향)

  • Kim, Mi-Suk;Moon, Yoon-Hee;Lim, Sabina;Kim, Dae-Jin
    • Journal of Life Science
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    • v.7 no.4
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    • pp.329-335
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    • 1997
  • This study was conducted to investigate the effect of dietary fiber(DF) levels on the meat quality in colored broiler. Colored broiler were fed on containing corn-soy basal diet(DF 5%) and high level(DF 6,7 and 8%) of dietary fiber diets for 7 weeks. Dietary fiber level of diet was make up by adding some alffalfa meal. Colored broiler meats were stored at 3$\circ$ for 24hr after skaughter, and used to analyze physico-chemical properties. Proximate component, pH, shear force value, myofibril fragmentation index, water holding capacity, cooking loss, protein extractability, fatty acid composition, Hunter's L, a value and palatability of cooked meat were not significantly affected by dietary fiber levels, whereas the Hunter's value of meat was significantly affected bty dietary fiber levels for the final period of feeding. Crude protein content, myofibril fragmentation index, water holding capacity, protein extractability and Hunter's b value of breast meat's were higher than thigh meat's, but crude fat content, pH, shear force value, cooking loss, palmitoleic acid, linolenic acid, and Hunter's a value were lower, regardless of dietary fiber level.

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Changes in the Growth , Chemical Composition and Nutritive Yield of Miscanthus sinensis at Different Cutting Dates (예취기시에 따른 참억새의 생육특성 , 성분함량 및 영양소수량의 변화)

  • 안영진;김병완;성경일;김창주
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.15 no.4
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    • pp.274-278
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    • 1995
  • This experiment was conducted to know what does the cutting date have an effect on the chemical composition and nutritive yield of Miscanthus sinensis, in order to determine the optimum cutting date of the plant when it is utilized as roughage. Miscanthus sinensis growing natively in the summit of Sam Ak mountain(550m above sea level) was cut at 10 days intervals from 25 July to 15 October, 1988. Plant length and dry matter contents were generally increased with delayed cutting date. Crude protein contents of the plant cut on 5, 15, and 25 of September were 5.5, 5.2 and 5.1%, respectively. Cmde fiber contents was similar with cutting treatment and averaged 35.6%. Cmde protein yield was higher in September than in other cutting date. Yield of crude fiber were 8.3, 9.3 and 9.3t/ha on 5, 15 and 25 September, respectively. Ratio of Cmde protein yield to Crude fiber yield on 5 September tended to be higher than on 15 September and 25 September. These results suggest that the optimum cutting date of the Miscanthus sinensis for good quality forage seems early September.

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NUTRITIONAL EVALUATION OF MAIZE FODDER AT TWO DIFFERENT VEGETATIVE STAGES

  • Azim, A.;Naseer, Z.;Ali, A.
    • Asian-Australasian Journal of Animal Sciences
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    • v.2 no.1
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    • pp.27-34
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    • 1989
  • Different fractions of maize plant and whole mixed fodder were analysed for their chemical composition and dry matter digestibility (DMD). Highest crude protein (CP) values were found in leaves as compared to the other portions. Younger plants contained more CP as compared to the matured ones. The crude fiber (CF) content of various fractions of the plant ranged between 19.12 to 35.60% with maximum values in the bottom portion of the stem. Matured plants contained more CF. The analysis of cell wall constituents indicated that the maximum values for neutral detergent fiber (NDF) were found in the bottom portion and in the whole mixed plant. The highest levels of acid detergent fiber (ADF) were observed in bottom fraction followed by whole mixed plant, whereas the other plant fractions did not show any differences. Variation in acid detergent lignin (ADL) values existed in different fractions of the plant and the lowest were in the top portion of the stem. Although there existed a variation in the mineral composition of different fractions of the plants, the results were non significant. Maximum DMD was found in leaves followed by the whole mixed plant, middle and bottom portion of the stem. The values of DMD were higher in younger plants as compared to the matured ones. It may be concluded that younger plants and the upper portion of the plants have a higher nutritive value as compared to the matured plants and lower portion of the plants.