• 한국염색가공학회지
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• 제9권5호
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• pp.42-51
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• 1997

The purpose of this article is to investigate the effect of $O_{2}$ low temperature plasma treatment oft chitosan treatment of polyester fabrics. Moisture regain, static charge, crease resistance and reduction ratio of the treated fabric were measured. The results of this study were as follows: The add-on ratio and. the moisture regain of polyester fabrics treated with chitosan after treated by plasma(CP PET) were higher than those of polyester fabrics treated with only chitosan(C PET). The static charge of polyester fabrics decreased greatly with increasing the concentration of chitosan. A durability for laundering of CP PET was higher than those of C PET. The crease resistance of polyester fabrics decreased with ihcreasing the concentration of chitosan continuously. CP PET had higher decreasing rate and better durability than C PET. It showed that chitosan-treated polyester fabrics had over 90% reduction ratio after 10 times of laundering, and CP PET had better reduction ratio than C PET.

• 한국유기농업학회지
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• 제15권4호
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• pp.437-452
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• 2007

친환경자재인 키토산과 목초액 처리가 가지 및 잎상추의 생육에 미치는 효과를 검토한 결과 다음과 같은 몇 가지 결론을 얻었다. 1. 키토산과 목초액 처리가 가지의 생육에 미치는 영향 1) 키토산과 목초액 처리 전 후 토양의 성분변화는 큰 차이는 없었으며, 총 미생물 수가 증가한 경향을 보였고, 미생물 종류 중에는 세균수가 많이 증가하였다. 그리고 방선균, 사상균 및 트리코데마수는 처리간 일정한 경향은 없었다. 2) 가지의 생육 및 수량은 대조구에 비해 키토산과 목초액 처리구에서 공히 유의하게 높았으며, 처리간에는 유의적인 차이는 없었다. 가지의 10a당 수량은 키토산과 목초액 처리구 공히 대조구에 비해 수량이 증가하였고, 처리 간에는 유의적인 차이는 없었다. 2. 키토산과 목초액 처리가 잎상추의 생육에 미치는 영향 1) 키토산과 목초액 처리 전 후 토양의 성분변화는 큰 차이는 없었으며, 미생물상에서는 총 미생물수가 증가하였고, 미생물 종류 중에는 세균수가 많이 증가하였다. 그 외 방선균, 사상균 및 트리코데마수는 처리간 일정한 경향은 없었다. 2) 잎상추의 생육은 대조구에 비해 키토산과 목초액 처리 공히 유의적인 차이가 인정되었으며, 처리간에는 유의적인 차이는 인정되지 않았다. 대체적으로 처리농도가 높을수록 생육이 양호한 것으로 나타났다.

• 한국의류학회지
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• 제29권7호
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• pp.997-1007
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• 2005

The textile finishing methods utilizing chitosan have been mostly focused on the applications in the improvement of the dyeing of cotton fabrics, or the improvement of hand of the cotton or wool fabrics. On the other hand, it Is difficult to find the application examples in the synthetic fiber fabrics including polyester and nylon fabrics. The aim of this study is to improve the stiffness and the poor wash fastness of the fabrics treated only with chitosan. We tried to improve the softness by employing chitosan and polyurethane mixture solution and to prevent the detachment of the chitosan from the fabric. The treatment was applied to cotton, polyester, and nylon fabrics. The change of the properties of the treated fabrics were investigated. The optimum finishing condition was sought by changing the mixture ratio of the chitosan/PU(polyurethane) solutions. The adjusted ratios of the chitosan/PU solutions were 1 : 0, 1 : 0.25, 1 : 0.5, and 1 : 2 during the mixture solution preparation. Using the KES(Kawabata Evaluation System), the physical and mechanical properties of the finished fabric specimens were analyzed, and hand values of the specimens were calculated through the use of translational formulas. According to the chemical composition of the fibers, chitosan solution or chitosan/PU mixture exhibited wide range of coating effect. Since the chitosan acid solution has high polarity, the bonding force with the cotton fibers is high. By the appropriate addition of PU in the chitosan treatment of cotton, KOSHI and HARI values of the fabric improved. The air permeability of the chitosan/PU treated cotton fabric specimen improved, resulting in the highest value at the mixture of chitosan : PU=1:0.25.

• 생물환경조절학회지
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• 제10권4호
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• pp.251-257
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• 2001

2000년 8월부터 2001년 4월까지 2년동안에 걸쳐 제주도 서부지역 표고 250m 지대인 북제주군 애월읍 유수암리에서 chitosan 처리가 가을감자의 생육 및 수량에 미치는 영향을 조사하였다. 3% chitosan 액제 200배액에 종서를 30분간 침지하였다가 정식한 처리구가 타처리구에 비하여 맹아가 완료되는 시기가 6∼4일이 빨랐고, 경장 및 경수는 3% chitosan 액제 200배액에 종서를 30분간 침지 처리구가 각각 56.5cm와 4.3개/주로 많았으며 복지수도 주당 19.0개로서 가장 많아다. 감자의 크기별 개수는 3% Chitosna 액체에 30분간 침지한 것을 50-200g까지의 상서가 12,952개/10a로 가장 많은 반면 30-50g 정도인 소서는 1,143개/10a로 중서 이상 비율이 높게 나타나 전체 숫자가 증가하는 경향이 있다. 감자의 총수량은 3% chitosan 200배액에 종서를 30분간 침지한 처리구가 2,963kg/10a로 가장 많아 처리간에 고도의 유의차가 있었다. 상서(30g 이상)의 수량은 3% chitosan 액제 200배액에 종서를 30분간 침지처리구가 2,761kg/10a, chitosan 분말 토양처리(10kg/10)+200배용액 경엽에 2회 살호한 것이 2,628kg/10a로 많았다. 감자 성분 분석결과 3% chitosan액제 200배액에 종서를 30분 침지처리구에서 Mg, Fe, K, B의 함량이 타처리에 비해 높게 나타나 이들 성분들이 엽록소를 증가시켜 주고 세포분열증가로 탄소동화작용을 촉진시켜서 전체적인 수량증수 요인으로 작용한 것으로 생갇되었다.

• 한국의류산업학회지
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• 제5권5호
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• pp.520-528
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• 2003

Chitosan was depolymerized by oxidizing agent, hydrogen peroxide ($H_2O_2$) and general properties of resulting low molecular weight chitosan(LMWC) were studied. Effect of amount of $H_2O_2$, ratio of $H_2O_2$/chitosan, and reaction temperature were investigated in preparing LMWC. In addition, the reduction of molecular weight of prepared LMWC were measured after a certain time passage. Pre-swelling treatment of starting chitosan affected uniform and mild reaction of depolymerization and increased the solubility of resulting LMWC. Prepared LMWC (Mw 100,000) showed a decrease in Mw by 25-35%. Prepared LMWC(Mw 60,000-70,000) showed a decrease in Mw by 10-15% after 7 months. Therefore, this depolymerizing process can be concluded desirable in terms of stability. In addition, yellowing of pre-swelling treated chitosan upon time passage was insignificant compared with that of untreated chitosan. Therefore, pre-swelling treatment of chitosan before depolymerization would be beneficial in terms of stability of physical state.

• 패션비즈니스
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• 제7권4호
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• pp.57-66
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• 2003

Cochineal dyeing was applied to natural fiber fabrics, cotton and silk fabrics, and synthetic fiber fabrics, nylon and polyester fabrics. Chitosan-pretreatment was applied to the fabrics in order to investigate the effect of chitosan treatment on the dyeing behavior. The effect of chitosan treatment on the mordanting was also investigated by incorporating Cu-mordant on the chitosan-treated or chitosan-untreated fabrics during the dyeing process.

• 패션비즈니스
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• 제7권3호
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• pp.36-44
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• 2003

Chitosan treatment of textile fabrics has been studied to improve fabric characteristics and functions. Natural dyestuffs have been more actively employed in environment-conscious finishing products. In this study, chitosan treated cotton and nylon fabrics were prepared for dyeing with a few natural dyestuffs. These were Caesalpina sappan, Gardenia jasminoides, and cochineal in the form of powder. Hand-related physical and mechanical properties and luster characteristics were examined using the KES-FB series instruments and a set of luster measuring equipment. The chitosan treatment seemed to be more effective in terms of increasing stiffness for cotton fabric. Since cotton fibers have more -OH groups in the molecules, they provide more linkage sites with the chitosan than the nylon 6 fibers do.

• Asian-Australasian Journal of Animal Sciences
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• 제19권9호
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• pp.1322-1327
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• 2006

An experiment was conducted to investigate the effects of supplemental copper (Cu) chelates (methionine, chitosan and yeast) on the performance, nutrient digestibility, serum IgG level, gizzard erosion, Cu content in the liver and excreta and the level of total cholesterol in breast muscle and serum of broiler chickens. Two hundred and forty hatched broiler chickens (Ross$^{(R)}$ 208) were assigned to 4 treatments: control, 100 ppm Cu in methionine chelate (Met-Cu), 100 ppm Cu in chitosan chelate (Chitosan-Cu) and 100 ppm Cu in yeast chelate (Yeast-Cu). Each treatment had six replicates of 10 (5 males+5 females) birds each. Weight gain and feed intake tended to be higher in Cu chelate treatments than the control; weight gain was significantly higher in the Met-Cu chelate treatment and feed intake was significantly higher in the Yeast-Cu chelate treatment than the control (p<0.05). Feed/gain was significantly different between treatments in which Met-Cu was lowest followed by the control, Chitosan-Cu and Yeast-Cu. DM availability was increased by Cu chelates among which chitosan-Cu showed the highest DM availability. Cu chelates supplementation tended to increase gizzard erosion index, and Cu content in the liver was highest in the Met-Cu treatment. Supplementation of Cu chelates tended to decrease total cholesterol level in breast muscle and serum but tended to increase the level of HDL in serum. It was concluded that dietary supplementation of 100 ppm Cu in chelates increased weight gain, feed intake and DM availability. Met-Cu was more effective than Chitosan-Cu or Yeast-Cu in improving productivity of broiler chickens.

• 한국염색가공학회지
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• 제14권6호
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• pp.313-318
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• 2002

Chitosan is known to be an excellent biocompatible natural polymer. Recently, with a growing interest of health and environment, chitosan which is good in no harmful effect on human body and environment, has been watched as the finish treatment of hygiene and pleasantness. The purpose of this study is to develop multi functional fabrics by chitosan added on acrylic acid grafted cotton fabrics. Therefore physical properties such as moisture regain, air permeability, whiteness, static voltage and tensile strength of chitosan added on acrylic acid grafted cotton fabrics were investigated. The results are as follows ; According to increased chitosan's concentration, grafting yield was decreased. Therefore thickness of film by treated chitosan added on acrylic acid grafted cotton fabric became thin. FT R spectra of chitosan add on acrylic acid grafted cotton fabric clearly showed peaks of COOH and $NH_2$, Moisture regain, static voltage of chitosan add on acrylic acid grafted cotton fabrics were increased than control. Air permeability, whiteness and tensile strength were decreased than control.

• Journal of Nutrition and Health
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• 제31권7호
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• pp.1112-1120
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• 1998

This study was conducted to investigate the effets of chitosan and beef tallow at different level on glucose and lipid metabolism in rats. Dietary fot level was 20% and 40%, and chitosan was given at levels of 0%, 3%, and 5%(wt/wt) of diet. Chitosan supplement tended to decrease the serum total lipids, total cholesterol, and triglycerides. HDL cholesterol and HDL cholesterol : total cholesterol ratio tended to increase with 5% chitosan supplementation. LDL cholesterol and VLDL triglyceride tended to decrease with chitosan supplementation. Lipid concentration of liver and epididymal fat pad(EEP) tended to decrease with medium dietary fat and chitosan treatment. fecal excretion of total lipid and triglyceride exhibited a tendency to increase with high fat levels and chitosan. Length of small intestine and gastrointestinal transit time were not affected by dietary fit levels or chitosan supplements. Therefore, it could be suggested that chitosan supplement had beneficial effects on lipid metabolism. (Korean J Nutrition 31(7) : 1112-1120, 1998)