Effects of hydrocolloids on wheat flour rheology Hydrocolloid 의 첨가가 밀가루 반죽의 특성에 미치는 영향
임경숙 Kyoung Sook Lim , 황인경 In Kyeong Hwang
15(3) 203-209, 1999
Title
Effects of hydrocolloids on wheat flour rheology Hydrocolloid 의 첨가가 밀가루 반죽의 특성에 미치는 영향
임경숙 Kyoung Sook Lim , 황인경 In Kyeong Hwang
DOI:
Abstract
The effect of several hydrocolloids on the rheological behavior of wheat flour was investigated. The influence of the selected hydrocolloids (alginate, carrageenan, CMC, guar, locustbean and xanthan) on wheat flour was tested by using two different techniques; amylograph and texture analyzer. In order to have a general overview of their effects hydrocolloids were chosen from different sources implying a broad diversity of chemical structures. The hydrocolloid addition decreased the brightness(L) but increased yellowness(b). The interaction between hydrocolloid and flour produces a slight modification of the amylogram parameters, being the most clearly affected parameter breakdown, which is increased by carrageenan, guar and xanthan. Hardness and cutting force were augmented by hydrocolloid addition, while springeness was decreased except guar and locustbean. In summary, when looking for the improvement of the noodle texture, guar, locustbean are the best candidate additives due to their effects on pasting and texture properties. These hydrocolloids increase the hardness, cutting force, gumness, chewness, so were thought to increase the eating quality. So, each tested hydrocolloid affected in a different way the rheological properties of wheat flour, the results obtained are important for the appropriate use of these hydrocolloid as ingredients in the noodle making process.
Key Words
Physicochemical and Sensory Characteristics of Brown Stock made with Pork Bone 돼지뼈를 이용한 Brown Stock 의 이화학적 및 관능적 특성
김용식 Yong Sik Kim , 장명숙 Myung Sook Jang
15(3) 210-215, 1999
Title
Physicochemical and Sensory Characteristics of Brown Stock made with Pork Bone 돼지뼈를 이용한 Brown Stock 의 이화학적 및 관능적 특성
김용식 Yong Sik Kim , 장명숙 Myung Sook Jang
DOI:
Abstract
The purpose of this study was to investigate the sensory and physicochemical properties of brown stock made with different main ingredients of bone (beef bone, pork bone, part of leg). Glycine, glutamic acid, arginine, valine were high in the free amino acid contents of brown stock made with beef and pork bones. On the other hand, the brown stock made with beef bone showed high contents of methionine, glycine, lysine, arginine. Viscosity of brown stock made with pork bone was the highest. As a result of the sensory evaluation for brown stock made with different ingredients of bone showed significant difference in all of the characteristics. By the color difference meter, the brown stock prepared from pork bone showed the lowest "L" value.
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Preparation of Sulgiduk added with Green Tea Powder with Response Surface Methodology 반응표면분석에 의한 가루녹차 설기떡 제조의 최적화
홍희진 Hee Jin Hong , 구연수 Yeun Soo Ku , 강명수 Myeong Su Kang , 김순동 Soon Dong Kim , 이순재 Soon Jae Rhee
15(3) 216-223, 1999
Title
Preparation of Sulgiduk added with Green Tea Powder with Response Surface Methodology 반응표면분석에 의한 가루녹차 설기떡 제조의 최적화
홍희진 Hee Jin Hong , 구연수 Yeun Soo Ku , 강명수 Myeong Su Kang , 김순동 Soon Dong Kim , 이순재 Soon Jae Rhee
DOI:
Abstract
The purpose of this study is to find out the optimal mixing ratios of three different amounts of green tea powder, sugar and water for preparation of Sulgiduk through Response Surface Methodology based on the color, sensory, and texture test. The green tea powder levels were included 0.5∼1.0%, water levels were included 15∼25% and sugar levels were included 5∼15% per weight of rice powder. The optimal mixing ratios of a green tea powder, sugar and water for manufacturing the best quality of Sulgiduk were 1.0%, 12% and 22%, respectively.
Key Words
Quality Characteristics of Seolgiddeok added with Green Tea Powder 가루녹차를 첨가한 설기떡의 관능적 품질특성
홍희진 Hee Jin Hong , 이순재 Soon Jae Rhee , 최정화 Jeong Hwa Choi , 양정아 Jeong Ah Yang , 김귀영 Gwi Young Kim
15(3) 224-230, 1999
Title
Quality Characteristics of Seolgiddeok added with Green Tea Powder 가루녹차를 첨가한 설기떡의 관능적 품질특성
홍희진 Hee Jin Hong , 이순재 Soon Jae Rhee , 최정화 Jeong Hwa Choi , 양정아 Jeong Ah Yang , 김귀영 Gwi Young Kim
DOI:
Abstract
The purpose of this study was to find out the optimal mixing ratio of green tea powder, sugar, and water for the preparation of Seolgiddeok through Response Surface Methodology based on the color, sensory, and texture test. The oganoleptic and textural properties of Seolgiddeok prepared with various concentrations of green tea powder (0% (control group), 0.5% (GT-0.5 group), 1% (GT-1.0 group), 1.5% (GT-1.5 group), 2% (GT-2.0 group)), and their quality changes during storage were also investigated. The optimal mixing ratio of green tea powder, sugar, and water for preparing the best quality Seolgiddeok was 1.0%, 12%, and 22%, respectively. The proximate composition of green tea powder was 21.70% of crude protein, 8.49% of crude lipid, 2.95% of reducing sugar, and 6.40% of ash. The contents of crude lipid, reducing sugar, and catechins in Seolgiddeok added with a green tea powder were increased with increasing the content of green tea powder. The hardness and gumminess of GT-1.0 group were the lowest among four groups, whereas GT-1.0 and GT-2.0 groups had the lowest cohesiveness. While the control group was the lowest in adhesiveness, the springness was not significantly different among all groups. GT-0.5 and GT-1.5 groups were the highest in sweet taste and colorfulness, respectively. However, GT-1.0 group had the best overall quality. Total microbial numbers, the acidity and pH in Seolgiddeok during storage were decreased with increasing green tea powder content, and especially those of GT-1.0 and GT-1.5 groups were relatively the lower than others. The "L" value (lightness) of the control group (no additives) was the highest among five groups, and the value was decreased with storage period, and especially GT-0.5 groups had the lowest brightness. The "a" value (reddness) of the control group was the highest, followed by GT-0.5, GT-1.0, GT-1.5, and GT-2.0 group in order. The "b" value (yellowness) was increased with the increase of green tea powder content. Above results indicated that GT-1.0 group showed the best quality of Seolgiddeok through organoleptic and rheology tests.
Key Words
Studies on the Anticancer Effect of Broussonetia kazinoki Extracts 닥나무 ( Broussometia kazinoki ) 추출물의 항암효과에 관한 연구
구성자 Sung Ja Koo , 민경진 Kyung Jin Min , 정승희 Seung Hee Choung
15(3) 231-237, 1999
Title
Studies on the Anticancer Effect of Broussonetia kazinoki Extracts 닥나무 ( Broussometia kazinoki ) 추출물의 항암효과에 관한 연구
구성자 Sung Ja Koo , 민경진 Kyung Jin Min , 정승희 Seung Hee Choung
DOI:
Abstract
The anticancer effect of the bark of Broussonetia kazinoki root extracts (hexane, chloroform, ethylacetate, butanol, aqueous) were studied. The cytotoxicity by MTT assay and inhibitory effect on the growth of sarcoma 180 cells were tested in vitro. The reduction rate of the tumor formation and spleen /body weight rate on BALB/c mouse were tested in vivo. From the tests, each fraction showed the cytotoxic effect against the sarcoma 180 cells. In addition, as the concentration of the fractions increased, cytotoxic effect tendency increased as well. The cytotoxic rate of the hexane, chloroform, ethylacetate, butanol and aqueous fractions showed by 58.7%, 40.1%, 75.7%, 52.6% and 62.7% respectively after testing by MTT assay system. And sarcoma 180 cells were incubated for 6 days at 37℃ with various concentrations of each fraction. As the incubation days go on, the number of cells increased, while the inhibition rate on the growth of sarcoma 180 cells were decreased. Especially the ethylacetate fraction at the concentration of 1.0 ㎎/㎖ strongly inhibited the growth of sarcoma 180 cells by 74% compared with the control for a day 37℃ The hexane, chloroform, ethylacetate, butanol and aqueous fractions inhibited on the growth of sarcoma 180 cells by 31 %, 19%, 60%, 30% and 42% respectively, when sarcoma 180 cells has been incubated for 6 days at 37℃. The each fraction exhibited the antitumor effect in vivo. The ethylacetate fraction reduced the tumor formation by 41% compared with the control, when sarcoma 180 cells were injected subcutaneously into the left groin of BALB/c mice. Also spleen/body weight rate of ethylacetate fraction was increased by 2.10% compared with the control (1.08%). And it is considered that there would be no toxic effect caused by each fraction of body weight and organ as there was on more changes in mouse` weight compared with the control.
Key Words
Development of Isolation Process of Barley Starch Using β-glucanase β-Glucanase 를 이용한 보리전분 분리공정의 개발
서호찬 Ho Chan Seo
15(3) 238-243, 1999
Title
Development of Isolation Process of Barley Starch Using β-glucanase β-Glucanase 를 이용한 보리전분 분리공정의 개발
서호찬 Ho Chan Seo
DOI:
Abstract
For the development of technique for isolation of naked barley starch from Youngsan variety, optimum conditions of the isolation process were investigated. The effect of blending was examined and the results showed that 29.7% starch yield was obtained by 6 times of blending. After the blending, the barley starch contained 3.2% protein, 0.7% fat, 0.4% fiber, 0.4% ash and 2.8% β-glucan. The opitmum conditions of β-glucanase treatment were studied and the results showed that the amount of β-glucanase and barley flour-water ratio were 60,000 unit and 1/2, the optimum steeping temperature, pH were 45℃ and 6.5, respectively. The effect of alkali treatment which would be supposed to increase the yield and purity of the barley starch was also examined. 76.7% starch content was obtained by 2 hr of alkali treatment. After all the treatment of isolation process, the barley starch finally contained 0.2% protein and 0.1% β-glucan.
Key Words
Effects of Binding Materials on Nutrients of Soondae 결착제를 달리한 순대의 성분에 관한 연구
손정우 Jung Woo Sohn , 염초애 Cho ae Yum , 이숙미 Sook Mi Lee
15(3) 244-248, 1999
Title
Effects of Binding Materials on Nutrients of Soondae 결착제를 달리한 순대의 성분에 관한 연구
손정우 Jung Woo Sohn , 염초애 Cho ae Yum , 이숙미 Sook Mi Lee
DOI:
Abstract
Soondae was prepared with porcine plasma or egg white as a substitute of porcine blood and their nutritional value was evaluated for th purpose of improving the quality of Soondae. The total energy of Soondae was 181.9 ㎉/100 g with the composition of 66.14% moisture, 9.25% protein, 10.44% fat, 0.89% ash, 0.54% fiber, and 12.74% carbohydrate. As the percentage of porcine plasma increased, the total energy was decreased. For the minerals, Fe content was the highest in original Soondae (8.5 ㎎/100 g) and the contents of Fe, Na, K were decreased with the increase of porcine plasma or egg white. The glutamic acid, leucine, lysine, glycine, and alanine were the major portion of the amino acid contents in Soondae. The U/S ratio was increased with the proportion of porcine plasma and egg white. The cholesterol content of original Soondae (66.6 ㎎/100 g) was decreased by 25.73% in porcine plasma Soondae and by 36.98% in egg white Soondae.
Key Words
Changes in Adding Soybean on Quality and surface structure of Korean Rice Cake ( Jeung-Pyun ) 콩첨가에 따른 증편의 품질과 표면구조 변화
신광숙 Kwang Sook Shin , 우경자 Kyung Ja Woo
15(3) 249-257, 1999
Title
Changes in Adding Soybean on Quality and surface structure of Korean Rice Cake ( Jeung-Pyun ) 콩첨가에 따른 증편의 품질과 표면구조 변화
신광숙 Kwang Sook Shin , 우경자 Kyung Ja Woo
DOI:
Abstract
Jeung-Pyun is a traditional fermented Korean food with rice flour, water, sugar, salt and unrefined rice wine(Takju). In order to investigate how the addition of soybean has an influence on Jeung-Pyun fermentation, changing to adding amount of soybean 0%, 5%, 10%, 15%, 20% based on rice weight, we carried out sensory evaluation and measured the physicochemical properties, instrumental characteristics and degree of gelatinization. The specific volume of Jeung-Pyun was increased as the more soybean was added. The pH of Jeung-Pyun batter was decreased as the fermentation time was longer, but it was increased as more soybean was added. The degree of gelatinization of Jeung-Pyun was decreased as storage day was longer, but it was high as more soybean was added compared to control(0%). In sensory evaluation, Jeung-Pyun added 5∼10% of soybean was good generally. Correlation coefficient between hardness and degree of gelatinization was high. In instrumental characteristics, hardness was increased only in control for room temperature storage(20℃), but at 4℃ it was less increased than control(0%) as more soybean was added. Cohesiveness was decreased generally as storage day was longer at 4℃, but it was less decreased as more soybean was added. In brittleness at 4℃, Jeung-Pyun of adding soybean was higher compared to control. In surface structure of Jeung-Pyun observerd by SEM, air pore size was small and distributed regularly as more soybean added. In conclusion, it can be suggested that the addition of soybean improve the quality of Jeung-Pyun.
Key Words
Contents of Pectic Substance and Minerals and Textural Properties of Leek Added Kimchi During Fermentation 부추첨가 김치의 발효과정 중 펙틴질과 무기질 함량 및 조직감
이귀주 Gui Chu Lee , 김유경 Yoo Kyung Kim
15(3) 258-263, 1999
Title
Contents of Pectic Substance and Minerals and Textural Properties of Leek Added Kimchi During Fermentation 부추첨가 김치의 발효과정 중 펙틴질과 무기질 함량 및 조직감
이귀주 Gui Chu Lee , 김유경 Yoo Kyung Kim
DOI:
Abstract
Kimchi prepared with various amounts of leek (4, 8, 12%) were fermented at 15℃ for 9 days and the changes in the contents of pectic substance and minerals were determined. Textural properties and sensory characteristics of kimchi were also evaluated after 3rd and 9th days of fermentation. During fermentation, the cutting force increased up to 7th day and then decreased slowly and that of control was higher than those of others. While the control kimchi showed an increase of hot-water-soluble pectin (HWSP) and decrease of HCl-soluble pectin (HClSP), the leek-added kimchi showed an opposite trend. In all kimchi samples, the contents of Ca, Mg and K decreased gradually, whereas that of Na increased slowly during fermentation. As the addition of leek increased in kimchi, the weaker the sourness and the better the appearance. Hardness of leek-added kimchi tended to be higher than that of control as measured by sensory evaluation. In overall acceptability, 12%-leek-added kimchi showed the highest score both at 3rd and 9th days of fermentation. These results suggested that the addition of leek improves the textural qualities of kimchi and enhances the sensory attribute such as flavor during fermentation.
Key Words
Effect of Microwave Preheating and Hydrogenated Frying Fats on the Storage Stability of Yackwa 마이크로웨이브 열처리 및 경화튀김유가 약과의 저장 안정성에 미치는 영향
김창순 Chang Soon Kim , 윤미화 Mi Hwa Yun
15(3) 264-271, 1999
Title
Effect of Microwave Preheating and Hydrogenated Frying Fats on the Storage Stability of Yackwa 마이크로웨이브 열처리 및 경화튀김유가 약과의 저장 안정성에 미치는 영향
김창순 Chang Soon Kim , 윤미화 Mi Hwa Yun
DOI:
Abstract
This study was conducted to know the storage stability of Yackwa, a traditional Korean fried cookie, prepared by two different cooking methods; deep fat frying at 160℃ for 8 min (DFF), and preheating Yackwa dough and then deep fat frying at 180℃ for 2 min (MW/DFF). Soybean oil (SBO), hydrogenated soybean oil (HSBO) or hydrogenated palm oil (HPO) were used for frying Yackwa. Compared to Yackwa prepared by DFF, all MW/DFF Yackwa samples had low fat content and high moisture content. MW/DFF saved frying time 6 min compared with DFE. Non-hydrogenated soybean oil for frying fats was replaced with hydrogenated types of soybean oil and palm oil to improve the storage stability of Yackwa. To investigate the oxidation stability of Yackwa during the accelerated storage for 15 days at 60℃, acid value, anisidine value, peroxide value and oxidation value of Yackwas were measured. Acid values of Yackwa made by MW/DFF were higher than those made by DFF through the whole storage periods, regardless of frying fats. Peroxide and anisidine values of Yackwa coated with syrup were much lower than those without syrup. MW/DFF cooking method, using hydrogenated soybean oil or hydrogenated palm oil for frying, showed lowering effects on peroxide value as well as anisidine value, resulting in improved oxidation stability of Yackwa during the storage. In sensory evaluation, the acceptability of MW/DFF Yackwa was higher than those of the commerical products. Yackwa prepared by MW/DFF cooking method using hydrogenated palm oil, showed the highest acceptability in color, taste and texture among the samples.
Key Words
A Survey of the Management of Elementary School Foodservice - 2. Satisfaction of Food Service and Food Preferences of the Elementary School Students in the Kwangju & Chonnam Area - 학교 급식 관리에 대한 실태 조사 - 2. 광주 전남지역 초등학생의 급식만족도와 음식기호도 조사 -
김경애 Kyung Ae Kim , 정난희 Lan Hee Jung , 김은영 Eun Young Kim , 전은례 Eun Raye Jeon
15(3) 272-287, 1999
Title
A Survey of the Management of Elementary School Foodservice - 2. Satisfaction of Food Service and Food Preferences of the Elementary School Students in the Kwangju & Chonnam Area - 학교 급식 관리에 대한 실태 조사 - 2. 광주 전남지역 초등학생의 급식만족도와 음식기호도 조사 -
김경애 Kyung Ae Kim , 정난희 Lan Hee Jung , 김은영 Eun Young Kim , 전은례 Eun Raye Jeon
DOI:
Abstract
Elementary schools students` degree of satisfaction on school food service and food preference were surveyed from 352 sixth-grade students in Kwangju and Chonnam area from June 22 to July 3 to enhance the quality of foodservice. The degree of satisfaction was high with cooked rice and soup in terms of temperature and serving state. There were significant differences in the degree of satisfaction depending upon the types of foodservice (p<0.001). There was significant differences in degree of satisfaction for side dishes depending upon the temperature (p<0.05), kinds (p<0.01) and amount (p<0.001). The degree of satisfaction with Kimchi was generally high in the serving state (p<0.05) and the amounts (p<0.01). The degree of satisfaction with desserts were high in the amount (p<0.001). The amount of leftover was high with soup, side dishes, kimchi, cooked rice, and desserts in order. The improvements made on children`s behavior after the implementation of the school foodsevice were the adaptation to balanced diet and spending less money on sweets. The factors of influencing the school foodservice and the children`s food intake were the education in school (teachers and dietitians) and the health status of their bodies (p<0.001). Children`s favorite foods were sweet and sour pork, pork cutlets, oranges, watermelons, and strawberries in order. The least preferred foods were garlic seasoned with soy sauce, raw vegetables of broad bellflowers, crown daisy greens, and steamed peppers. Children`s favorite food types were fried food, desserts, one course meal, and bread. The least preferred types were pickled food, green and seasoned vegetables, cooked rice, and hard-boiled food in order. Generally, the children in the rural area favored most foods compared with those from urban area.
