• 한국염색가공학회지
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• 제12권6호
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• pp.353-360
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• 2000

In this article, arrowroot is extracted in distilled water, and its dyeing properties on wool, nylon, and silk were investigated. Also the effect of mordanting (Al, Cu, Sn, Fe and Cr compounds) on the wash fastness are measured. The wavelength of maximum absorption of the arrowroot extract appears at 250 and 300nm below pH 7, but they shifted to longer wavelength at higher pH values. It appears that the optimum condition of the dyeing of wool, nylon, and silk fabric with arrowroot extract is $60^\circ{C}$, 60 min, and pH 4.0. Mordant treatments are effective in improving wash fastness of polyamide fabrics.

• 한국염색가공학회지
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• 제15권3호
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• pp.140-145
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• 2003

The purpose of this study is searching the Elm-Bark dyes' dyeability and antibacterial activities according to the dyeing time, pH, a mordant and the method of mordancy. We used two kinds of Elm-Bark dyes which's extracted by the Electrolytic reduction water and Distilled water. Silk fabric and Cotton/nylon union fabric was used for this study. The results are as follow. K/S value is increased according to the dyeing time and the suitable pH level is pH 3. Dyeability is good with Iron(II) sulfate$(FeSO_4\cdot{7H}_2O)$ on the pre-mordancy and Potassium dichromate$(K_2Cr_2O_7)$ on the post-mordancy. The Elm-Bark dyes by the Electrolytic reduction water has good colorfastness more than by the Distilled water. Antibacterial activities is excellent and the ratio is over than 99.5%.

• 한국응용과학기술학회지
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• 제28권4호
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• pp.402-409
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• 2011

Compatibility and properties of PP/N66 blends with or without PP-g-MAH as a compatibilizer were investigated by DSC, SEM and universal testing machine. Morphological studies revealed that PP and N66 were incompatible and addition of PP-g-MAH was very effective to enhance the compatibility between PP and N66. The compatibilization effect between N66 and PP-g-MAH was based on the reaction between the amine end group of N66 and anhydride group in PP-g-MAH. The crystallization and melting behavior of PP/N66 blends were investigated and the results of analyses for enthalpy changed were discussed. The Izod impact strength could be improved by optimizing the compatibilizer concentration. Tensile strength, elongation at break, notched Izod impact strength were increased with using compatibilizer, however, both the compatibilized and the noncompatibilizer blends did not show any big difference in the flexural modulus.

• 대한수의학회지
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• 제35권4호
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• pp.769-776
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• 1995

This study was undertaken to develop the monoclonal antibody(MAb) for lymphocytes of Korean native cattle by the cell hybridization of myeloma P3/NS-1/ 1-Ag-4-1 and spleen cells from BALB/c mice hyperimmunized with nylon wool column eluted peripheral T lymphocytes of Korean native cattle. The isotype of MAb KCT-14 against T lymphocyte was mouse $IgG_1$. KCT-14 positivity of mononuclear cells(MNC) from peripheral blood lymphocytes, nylon wool nonadherent and adherent-lymphocytes was 41.7%, 58.4% and 22.6%, respectively. And that of mesenteric lymph node-, spleen and thymus-MNC was 43.3%, 40.2% and 33.6%, respectively. Immunoperoxidase staining of frozen tissue sections showed that the MAb positive cells were located in the medulla of the thymus and in the paracortical area and the mantle zone of the germinal center in the lymph nodes. These results indicated that KCT-14 was one of the MAb for investigate of T lymphocyte subpopulations in the Korean native cattle.

• 수산해양기술연구
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• 제53권4호
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• pp.317-326
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• 2017

Comparative fishing experiments were conducted in the eastern coastal waters near Uljin, Korea from 2002 to 2004, using the experimental trammel nets to estimate the selectivity for spinyhead sculpin Dasycottus setiger. The inner panels of the nets were made of nylon monofilament with four mesh sizes (82.2, 89.4, 104.8, and 120.2 mm) while its two outer panels were made of twisted nylon multifilament with a mesh size of 510 mm. The SELECT (Share Each Length's Catch Total) procedure with maximum likelihood method was applied to obtain a master selection curve. The different functional models (normal, lognormal, bi-normal, and logistic model) were fitted to the catch data. The lognormal model with the fixed relative fishing intensity was chosen as the best-fitted selection curve through comparison of model deviance and AIC (Akaike's Information Criterion). The optimum relative length (the ratio of fish total length to mesh size) with the maximum relative efficiency was obtained as 2.492.

• 한국의류학회지
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• 제29권11호
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• pp.1520-1526
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• 2005

Henna is a natural colorant and has been used to dye hair, skin and leather since civilization began. It has reddish brown to orange shade. The major color components of Henna are Lawsone(2-hydroxy-1,4-naphthaquinone) and Luteolin (3',4',5,7-tetrahydroxy-flavone). In this study, various fibers containing the nitrogen component, especially used fur underwear, were dyed with Henna under various dyeing conditions, then dyeing characteristics, color fastness, and anti-bacterial properties were evaluated. from the results, Henna has good affinity to the chlorinated wool>wool>Pu/nylon>nylon>soybean>silk in decreasing order. The color fastness of the wool fabric dyed with Henna to washing, dry-cleaning, and perspiration showed 4-5 grade. The color fastness to light was 3rd grade. These results are relatively good comparing with other natural dyes. Moreover dyed fabric with Henna showed excellent antibacterial activity.

• 한국산학기술학회논문지
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• 제8권1호
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• pp.151-155
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• 2007

사과 절편에 레몬, 귤, 오렌지, 파인애플 그리고 루바브 주스로 전 처리한 후 $4^{\circ}C$에서 저장하면서 갈변억제 효과를 측정한 결과 루바브 주스로 처리한 경우 L값 (0.47) 및 E값의(1.8) 변화가 매우 낮아 처리구 중에 가장 우수한 갈변 억제 효과를 보였다. 루바브 주스의 갈변 억제력은 원액을 2배 희석하더라도 저장 6일 정도까지 효과적으로 갈변이 억제되었다. 투과성 ($4{\mu}m$ LDPE) 및 차단성 포장재($65{\mu}m$ Nylon/PE 복합필름)에 따른 사과 절편의 갈변 억제 효과는 최대 저장 기간 7일 동안 갈변 억제력의 유의성 차이를 볼 수 없었다. 기체조성을 달리하여 포장한 경우에는 진공감압 (0.1atm) 및 고산소(70% $O_2$) 포장보다는 질소 충진 (100% $N_2$) 포장의 경우가 갈변억제력이 뛰어났다.

• 한국고분자학회지:고분자과학과기술
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• 제21권4호
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• pp.321-325
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• 2010

• 한국방사선학회논문지
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• 제12권7호
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• pp.909-917
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• 2018

3D 프린팅 기술은 4차산업 혁명 중 제조업의 혁신적인 기술로서 전망되고 있으며, 현재 바이오 의료 분야를 포함한 다양한 분야에서 활용되고 있다. 본 연구에서는 이러한 3D 프린팅 기술을 이용한 제작 원료에 대한 방사선 차폐능을 평가하고자 몬테카를로 전산모사를 통해 프린팅 원료에 대한 검증을 수행하였다. 현재 범용으로 사용되는 FDM 방식의 3D 프린터에서 이용 가능한 원료들을 대상으로 하였으며, ICRU phan tom과 차폐체를 모의 모사한 후 방사선의 종류 및 에너지에 따른 입자 플루언스 평가를 통해 차폐 효과에 대해 분석하였다. 그 결과, 광자선의 경우 에너지 증가에 따라 차폐 효과는 점차 감소되는 경향을 보였고, 원료별 차폐 효과는 TPU, PLA, PVA, Nylon, ABS 순서로 점차적으로 낮아지는 결과를 나타냈다. 중성자선의 경우, 5~10 mm의 낮은 두께에서 반대로 선속이 증가되는 현상을 보였으나, 일정 두께 이상에서는 유효한 차폐 효과를 나타내었으며, 프린팅 원료별 차폐 효과는 Nylon, PVA, ABS, PLA, TPU 순서로 점차 낮아지는 결과를 보였다.

• 한국응용과학기술학회지
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• 제19권4호
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• pp.291-296
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• 2002

Fatty polyamide that gives softness, lubrication and bulky property and alkyl imidazoline that gives durable softness and antistatic property were synthesized. then, an O/W-type durable softener (DSN) was prepared by the emulsion of the synthesized fatty polyamide and alkyl imidazoline. Emulsion stability of the DSN was good, and the mixed HLB value was 11.2. From the measurement of softness, lubrication, antistatic property, bending resistance, and color fastness, it was proved that the prepared DSN was a good durable softener for nylon.