• Korean Journal of Food Science and Technology
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• v.31 no.5
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• pp.1308-1314
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• 1999

The effects of modified atmosphere(MA) packaging and coating on the quality of mushroom (Agaricus bisporus) were investigated. Whole mushrooms(100 g) were packed with polyvinyl chloride(PVC) film wrap, PD941 and PD961 film bags and were stored in a chamber at $12^{\circ}C$ and 80% RH for 6 days. Gas composition of packages, respiration rate, weight loss, color and maturity index of MA packaged mushrooms were examined. The wrap packaged mushrooms showed different level of internal $CO_2$ concentrations among water washed, chitosan coated and $CaCl_2$ coated subgroups significantly at 5% level. The maximum $CO_2$ concentration of PD941 and PD961 packages for all coated showed $4.1{\sim}4.7%$ and $10.4{\sim}11.7%$, respectively, for the first day. PD961 package showed the lowest $O_2$ concentration compared to other groups. There were no significant respiration rate differences between wrap packed and PD941 packaged. Respiration rate of water washed. chitosan coated and $CaCl_2$ coated in PD961 packaged was 192 mg, 226 mg and 245 mg, respectively. Maturity index of PD961 packaged were not significantly different among the water washed, chitosan and $CaCl_2$ coated packages. Chitosan coating showed a negative effect on color change of mushrooms. The weight loss of 961 packaged was lower $(7.0{\sim}8.0%)$ that those of wrap packaged and PD941 packaged.

• Journal of Fashion Business
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• v.8 no.1
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• pp.156-163
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• 2004

The purpose of this study is to investigate the change of handle when cotton fabric is treated with chitosan-polyurethane mixed solution and crosslinked with epichlorohydrin in order to form three-dimensional crosslinks in the molecules, which in turn would improve the wash-fastness of the chitosan-treated fabrics. The application of epichlorohydrin decreased the EM(Tensile extensibility) and WT(Tensile energy) values, indicating the stiffness increased in the treated fabrics due to the 3-dimensional crosslinking. The crosslinking of the cotton fabric samples resulted in the increase in T.H.V. effectively for the use of summer dress shirt fabric.

• The Research Journal of the Costume Culture
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• v.11 no.3
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• pp.423-430
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• 2003

Cotton fabric md nylon fabric were chosen as base fabric specimens for dyeing using Japanese pagoda tree colorants through chitosan, treatment. With the chitosan treatment, the dye-uptake of the treated fabric increased. This treatment is also expected to be effective in terms of environment-friendliness. The effect of the dyeing methods, mordanting or non-mordanting, and chitosan treatment on the dye-uptake and air permeability of the treated fabrics was investigated. In case of cotton fabric, Al mordanted dyeing resulted in higher dye-uptake through the chitosan treatment. Therefore, the chitosan treatment is effective in this case. Japanese pagoda tree seems to have direct affinity for nylon fabric without the mordanting treatment. In case of cotton fabric, it seems that the cellulose molecules, colorants, and the chitosan make a complex, thereby reducing the air permeability. In case of nylon fabric, due to the fact the Japanese pagoda tree colorant molecules form direct physical bonding with the nylon molecules, it seems that there is not much of air permeability reduction.

• The Research Journal of the Costume Culture
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• v.11 no.3
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• pp.431-440
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• 2003

The purpose of this study is to investigate the feasibility of applying the chitosan for a natural mordant. The chitosan, a natural chelate macromolecule, is acquired from the crustacean. Investigation was focused on the change of the dyeability according to the chitosan treatment based on the Caesalpinia sappan and the color change of the dyed fabric according to the application of heavy metal mordant. The change of air permeability of the fabric with the dyeing condition was also investigated systematically. The effect of dyeing with/without mordant on the air permeability of the fabric after the chitosan treatment. It seems that the increase in the dye-uptake is attributable to the fact that chitosan forms a complex with the Caesalpinia sappan and Al during mordant dyeing of cotton fabric. For nylon fabric, the darkest color was achieved on the occasion of non-mordant dyeing of the fabric. The mordant treatment or chitosan treatment, however, reduced the dyeability. While the dyed nylon fabric could maintain the same air permeability as the grey nylon fabric, the cotton fabric lowered the air permeability after dyeing.

• Journal of the Korean Society of Clothing and Textiles
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• v.22 no.8
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• pp.1079-1089
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• 1998

Various fabrics, including natural fibers, regenerated cellulosic fibers, synthetic fibers, blend yarn, and mixture fabrics, were treated with the solutions of high purity chitosan in 1% acetic acid, having high viscosity of 930cps or low viscosity of 8cps. Physical/ mechanical properties of the treated fabrics samples were measured using Kawabata Evaluation System and drape tester. From these, hand values and total hand values of the fabric samples were calculated using Kawabata-Niwa translation equations. KOSHI, SHARI, HARI values have increased for the treated samples, while FUKURAMI values have decreased in general.

• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.1
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• pp.87-91
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• 1997

A method for lab scale production and isolation of chitosan from mycelia of Cunninghamella blakesleeana IFO 4443 mutant was developed. Mutant of Cunninghamella blakesleeana IFO 4443-10 obtained by W radiation was cultivated in 5L jar fermentor at 3$0^{\circ}C$ for 3days. The fungus were grown well at pH 4.5 Chitosan was readily extracted from mycelia walls with alkali treatment. The maximum yield of chitosan obtained was 1012mg/L and degree of deacetylation was 84.6%.

• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.3
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• pp.414-422
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• 1999

The purpose of this study is to develop multifunctional fabric that was improved antimicrobial activity and reduction rate of gas by treatment of mixture that was blended chito colla ad crosslinking material for Nylon. Antimicrobial activity was proved 99% reduction rat of gas in case of treated was icreased. The surface of treated fiber noted harshness and irregularity. Whiteness of treated on the baking condition was decreased as time and temperature was increased. Air permeability and moisure regain of treated equally was maintained. Water absorption and static voltage of treated were increased. KOSHI and T.H.V. of treated was increased than that of untreated B/W of treated was improved that, that of untreated and 2HB/B. W/T of treated were reduced.

• Journal of Animal Science and Technology
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• v.52 no.1
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• pp.43-50
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• 2010

The study was carried out to investigate the effects of chitosan-adding (0.5-1.5%) on nitrite-reduced (30 ppm) and sodium lactate-reduced (0-2%) sausages to avoid using excessively sodium lacte, which is substituted for sodium nitrite, The number of 24 rats for blood properties were used in this experiment and raised for 1-4 weeks. The color of sausages showed significant differences each treatment (p<0.05) and $a^*$ (redness) had the highest value in control (nitrite 100 ppm) and $b^*$ (yellowness) had the lowest value in T3 (nitrite 30 ppm + sodium lactate 0% + chitosan 1.5%). There were not significant differences in pH (5.53-5.66) and water holding capacity (66.06-69.75%) between control and two treatments (T1, nitrite 30 ppm + sodium lactate 2% + chitosan 0.5%; T2, nitrite 30 ppm +sodium lactate 1% + chitosan 1%), but T3 had significant differences in pH (5.06) and water holding capacity (62.44%), respectively. Springiness, cohesiveness, chewness and adhesiveness in texture analysis had not significant differences between control and three treatments, but hardness and gumminess had lower values in control than in three treatments. Appearance and color in sensory evaluation had higher values in control than in T1, but texture and flavor had lower values than in three treatments. Microbial counts had not significant differences in control, T2 and T3 for 1 week, for 3 weeks, it showed the lowest value in control than in three treatments. Anti-oxidant activity (TBARS) in sausages were more effective in control (p<0.05). The body weigh gain of rat were significantly increased in three treatments and also neutral fat, total cholesterol, LDL-cholesterol were significantly decreased in three treatments. However, T1 treatment had higher blood glucose content and significantly decreased in HDL-cholesterol, compared with control, but T2 and T3 treatments showed similar results in body weight gain and blood properties. So, through the addition of chitosan, it's possible to manufacture nitrite-reduced and sodium lactate-reduced sausage which is supplemented its function.

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.8
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• pp.985-991
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• 2008

This study was to investigated the changes of physiologically active components in germinated brown rice treated with chitosan (CGBR) and its anti-obesity effect in rat fed a high fat diet. Contents of physiologically active compounds such as total phenolic compounds, total dietary fiber, $\gamma$-aminobutyric acid (GABA), and total phytic acid in CGBR were significantly higher than those of traditional germinated brown rice (GBR). Lipase inhibitory activity of CGBR was higher than those of GBR and brown rice (BR). High fat diets containing CGBR, GBR, and BR were administered to three groups of male Sprague-Dawley rats for four weeks. All groups showed no significant difference in body weight, total abdominal fat, and plasma lipid levels. However, CGBR group appeared to have lower body weight gain and total abdominal fat level than other groups fed high fat diets containing GBR and BR. Total cholesterol and LDL-cholesterol contents in plasma of CGBR group were also lower than those of other groups. Thus, new germination method of brown rice using chitosan is a useful process, which utilizes plant defense responses to elevate the production of secondary metabolites and anti-obesity effect.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2006.11a
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• pp.146-149
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• 2006