• 제목/요약/키워드: Korean Tea

검색결과 2,951건 처리시간 0.031초

Effect of Gam-Tea on the Metabolizing Enzyme Activity of Some Free Radical and Alcohol in Rats

  • Yoon, Chong-Guk;Chae, Soon-Nim;Shin, Joong-Kyu
    • Preventive Nutrition and Food Science
    • /
    • 제3권1호
    • /
    • pp.67-70
    • /
    • 1998
  • To investigate an effect of Gam-Roa tea on the free radical or alcohol detoxicating enzyme activities, the rats got a drink at the Gam-Roa tea instead of water for 3 months, and then the animals were sacrificed and obtained the following findings. The animals receiving Gam-Roa tea showed a decreasing tendency of hepatic xanthine oxithine oxidase activity and significantly incresed content of cytochrome P-450 compared with the control. Furthermore, hepatic superoxide dismutase and glutathione S-transferase activities were also more increased in rats received Gam-Roa tea than in the control group, those receiving water. On the other hand, alcohol or aldehyde dehydrogenase activities were more increased in rats receiving Gam-Roa tea than the control. In conclusion, it is likely that the liver of rats receiving Gam-Roa tea may have the oxygen free radical or alcohol detoxication potential.

  • PDF

Hepatotoxicity in an Adolescent with Black Iced Tea Overconsumption

  • Hadjipanayis, Adamos;Efstathiou, Elisavet;Papaevangelou, Vasiliki
    • Pediatric Gastroenterology, Hepatology & Nutrition
    • /
    • 제22권4호
    • /
    • pp.387-391
    • /
    • 2019
  • Tea is the most widely consumed beverage after water in the world. The consumption of iced tea has increased in Western countries and spiked among teenagers for enjoyment, freshening up and alertness. A teenager presented with symptoms of hepatitis. Liver ultrasound revealed sludge in the gallbladder. Laboratory investigations excluded all known causes of hepatotoxicity. Detail nutritional history revealed that the patient had been drinking 1.5-2 liters of black iced tea per day for the last three months. He was immediately advised to stop drinking any tea. Gradually all symptoms disappeared and two months after discontinuation of the tea, all liver enzymes returned to normal and the sludge in the gallbladder disappeared. This case report underlines the importance of a meticulous assessment of a child's dietary behavior when investigating a case of hepatotoxicity and raises awareness about the potential side effects of tea overconsumption.

녹차, 오룡차, 홍차 추출물을 첨가한 돼지고기 수육의 품질특성 (The Quality Characteristics of Boiled Pork Supplemented with Tea Extracts)

  • 조경옥;김선임
    • 한국식품영양과학회지
    • /
    • 제42권5호
    • /
    • pp.774-783
    • /
    • 2013
  • 본 연구는 녹차, 오룡차, 홍차 추출물 0.5, 1, 1.5, 2%를 비육돈육(B 등급) 등심 수육에 첨가하여 수육의 일반성분, 보수력, 경도, pH, 색도, 미생물 수준, 휘발성 염기질소, TBARS, 관능검사의 품질특성을 측정하였다. 녹차의 수분 함량은 3.4%, 조단백질 31.8%, 조회분 5.5%, 탄수화물 57.7%였으며 차 종류에 따른 유의적인 차이는 없었다. 그러나 조지방은 녹차 1.6%, 오룡차 1.0%, 홍차 0.9%로 녹차의 조지방 함량이 오룡차나 홍차보다 유의적으로 높았다(p<0.05). 돼지고기 수육의 수분 함량은 55.1%, 조단백질 38.6%, 조지방 5.2%, 조회분 0.9%이었다. 보수력은 모든 차 추출물 첨가 수육에서 유의적으로 증가하였으며(p<0.05) 차 종류에 따른 차이는 없었다. 경도는 모든 차 첨가 수육에서 추출물 농도가 높아질수록 유의적으로 증가하였으며(p<0.05) 홍차 수육이 녹차와 오룡차 수육보다 경도가 낮았다. 수육의 pH는 제조일에는 각 처리구와의 유의적인 차이는 없었다. 그러나 저장기간이 경과함에 따라 무처리 수육과 모든 차 0.5% 수육에서 pH는 유의적으로 감소하였으나(p<0.05) 1, 1.5, 2% 녹차, 오룡차, 홍차 수육에서는 저장 중 pH의 유의적인 차이는 없었다. 녹차 수육은 추출물 농도가 증가할수록 명도와 황색도는 감소하였고 적색도는 감소하다가 2% 녹차 수육에서는 증가하여 0.5% 녹차 수육과 같은 수준이었다. 오룡차 수육은 추출물 첨가 농도가 증가함에 따라 명도와 황색도는 감소하였고 적색도는 증가하였다. 홍차 수육은 추출물 첨가 농도가 증가함에 따라 명도, 적색도, 황색도가 유의적으로 감소하였다. 미생물 수준은 모든 차 처리 수육에서 추출물 농도가 증가함에 따라 미생물 수준이 유의적으로 낮았으며(p<0.05) 저장 기간이 증가함에 따라 미생물 수준이 증가하였다. 수육의 휘발성 염기질소 함량은 제조일에는 각 처리구와의 유의적인 차이는 없었으며 저장 기간이 경과함에 모든 수육에서 유의적으로 증가하였다(p<0.05). TBARS 값은 제조일에는 무처리 수육보다 1, 1.5, 2% 녹차 수육과 오룡차 수육, 모든 홍차 수육이 유의적으로 낮았으며, 저장 기간이 경과함에 따라 모든 수육에서 TBARS 값이 높아졌다. 관능검사 결과 홍차와 오룡차 1% 추출물 첨가 수육이 색, 향, 종합적 기호도의 점수가 가장 높았으나 유의적인 차이는 없었으며 맛 점수는 유의적으로 높았다. 이상의 결과를 종합하여 볼 때 녹차보다 오룡차와 홍차 추출물의 첨가가 돼지고기 수육의 이취를 감소시키고, 특유의 색상을 부여하여 관능적 품질을 향상시킬 뿐만 아니라 가열 조리 및 저장 중 지방산패를 방지하여 품질 변화를 최소화하는데 효과적인 것으로 평가되었다. 특히 돼지고기 수육의 품질향상을 위해서는 홍차 추출물의 이용이 가장 좋았으며 오룡차와 홍차 추출물의 최적 첨가 농도는 1%로 나타났다.

Sensory Characteristics and Consumer Acceptability of Various Green Teas

  • Lee, Ok-Hee;Lee, Hye-Seong;Sung, Young-Eun;Lee, Soh-Min;Kim, Young-Kyung;Kim, Kwang-Ok
    • Food Science and Biotechnology
    • /
    • 제17권2호
    • /
    • pp.349-356
    • /
    • 2008
  • The green tea market is rapidly growing and identifying the driving factors of consumers' liking for the green tea is important in the tea industries. The objectives of this study were to investigate the effects of manufacturing conditions of the green tea on its sensory characteristics, to elucidate its relationship with the consumer liking. A descriptive analysis and consumer acceptability test were conducted for various green tea samples. The samples differed with regard to the source of the tea, the amino acid content, and the processing methods including the roasting temperature. Partial least square regressions (PLS-R) were performed to establish the relationship between the descriptive data and the consumer acceptability data. The PLS-R results showed that the majority of the consumers liked a green tea which has a stronger 'sweet taste' and roasting-related flavors such as 'roasted barley' and 'burnt leaf'. Such sensory characteristics were produced when a sample made of tea leaves mixed with the tea stem was roasted at a high temperature ($250^{\circ}C$) in this study.

플라즈마 광촉매 복합 긍정을 이용한 악취물질 중 TEA, MEK의 분해처리 (Treatment of Odorous air pollutants by Plasma and Photocatalytic Process.)

  • 최금찬;정창훈
    • 한국환경과학회지
    • /
    • 제12권12호
    • /
    • pp.1255-1260
    • /
    • 2003
  • Plasma-photocatalytic oxidation process was applied in the decomposition of Triethylamine(TEA) and Methyl ethyl ketone(MEK). Plasma reactor was made entirely of pyrex glass and consists of 24mm inner diameter, 1,800mm length and discharge electrode of 0.4mm stainless steel. And initial concentrations of TEA and MEK for plasma-photocatalytic oxidation are 100 ppm. Odor gas samples were taken by gas-tight syringe from a glass sampling bulb which was located at reactor inlet and outlet, and TEA and MEK were determined by GC-FID. For plasma process, the decomposition efficiency of TEA and MEK were evaluated by varying different flowrates and decomposition efficiency of TEA and MEK increased considerably with decreasing treatment flowrates. For photocatalytic oxidation process, also the decomposition efficiency of TEA and MEK increased considerably with decreasing treatment flowrates. The decomposition efficiency of MEK was 57.8%, 34.2%, 18.8% respectively and the decomposition efficiency of TEA was reached all 100%. This result is higher than that of plasma process only, From this study, the results indicate that plasma-photocatalytic oxidation process is ideal for treatment of TEA and MEK.

Green tea and type 2 diabetes

  • Park, Jae-Hyung;Bae, Jae-Hoon;Im, Sung-Soon;Song, Dae-Kyu
    • Integrative Medicine Research
    • /
    • 제3권1호
    • /
    • pp.4-10
    • /
    • 2014
  • Green tea and coffee consumption have been widely popular worldwide. These beverages contain caffeine to activate the central nervous system by adenosine receptor blockade, and due to the caffeine, addiction or tolerance may occur. In addition to this caffeine effect, green tea and coffee consumption have always been at the center of discussions about human health, disease, and longevity. In particular, green tea catechins are involved in many biological activities such as antioxidation and modulation of various cellular lipid and proteins. Thus, they are beneficial against degenerative diseases, including obesity, cancer, cardiovascular diseases, and various inflammatory diseases. Some reports also suggest that daily consumption of tea catechins may help in controlling type 2 diabetes. However, other studies have reported that chronic consumption of green tea may result in hepatic failure, neuronal damage, and exacerbation of diabetes, suggesting that interindividual variations in the green tea effect are large. This review will focus on the effect of green tea catechins extracted from the Camellia sinensis plant on type 2 diabetes and obesity, and the possible mechanistic explanation for the experimental results mainly from our laboratory. It is hoped that green tea can be consumed in a suitable manner as a supplement to prevent the development of type 2 diabetes and obesity.

전북지역 성인의 녹차 및 녹차관련 제품에 대한 기호도와 이용실태에 관한 연구 (The Preference and Utilization of Green Tea and its Products of Adults in Chonbuk Area)

  • 양향숙;노정옥
    • 대한가정학회지
    • /
    • 제44권9호
    • /
    • pp.21-29
    • /
    • 2006
  • The purpose of this study was to investigate the preferences and utilization of green tea and its products for adults living in Chonbuk area. Self-administered questionnaires were collected from 388 (117 male, 271 female) subjects. who were classified into 5 groups by age. Data were analysed by chi-square and ANOVA. The results can be summarized as follows. On the investigation of preferences, there was a significant difference between and among the age groups(p<.001). More than 20% of the subjects in the $20{\sim}29$ years group preferred coffee and juice. A half of the elderly over 60 years preferred a kind of green tea. The frequency of green tea drinking was not significantly influenced by age. Drinking green tea less than once a day was replied by 59.0% of the subject of whom 44.3% drank the green tea at home. and 42.0% got information about green tea from TV or radio. Regarding the satisfaction with products using green tea, 62.6% of the subjects responded only 'mediocre.' The brown rice-green tea was marked to be the highest in terms of recognition among all kinds of products. The green tea-related products were rated higher by the elder group. In conclusion, future research should focus on the development of green tea and its products in accordance with the consumption pattern in each age group.

균주를 접종하여 제조한 청태전 차의 관능적 특성과 생리활성 효과 (Sensuous Characteristics and Physiological Activity of Cheongtaejeon Tea Produced with the Inoculation of Microbial Strains)

  • 허북구;조정일;박용서;박윤점;조자용
    • 한국지역사회생활과학회지
    • /
    • 제21권1호
    • /
    • pp.139-148
    • /
    • 2010
  • This study was conducted to restore our traditional Cheongtaejeon tea and to develop the special products. We inoculated Cheongtaejeon tea with lactobacilli (Lactobacillus plantarum CHO 25) and the mixed microbial strains (L. plantarum CHO 25 + Saccharomyces cerevisiae + Bacillus amyloliquefaciens CHO 104). We also examined the sensuous characteristics and physiological activity of Cheongtaejeon tea which was produced by the inoculation of microbial strains. The external appearance of Cheongtaejeon teas were not significant among the teas which were produced with or without the inoculation of L. plantarum CHO 25 and the mixed microbial strains. The taste of the tea increased most in Cheongtaejeon tea which was produced without the inoculation of microbial strains. The taste and liking of Cheongtaejeon tea which was inoculated with Aspergillus oryzae and Aspergillus niger decreased significantly, and it was not suitable to drink. Total phenolics compound contents, total flavonoid contents and DPPH ($\alpha,\alpha$-diphenyl-$\beta$-picryl-hydrazyl) radical scavenging activity of Cheongtaejeon tea extracts increased much more in the order of that produced with the inoculation of L. plantarum CHO 25, control and that with the mixed microbial strains. However, nitrite radical scavenging activity in 1,000 mg/L Cheongtaejeon tea hot water extracts were in the order of the control (94.4%), the inoculation of L. plantarum CHO 25 (93.6%) and the mixed microbial strains (91.1%). Overall results indicated that the sensuous characteristics increased most in Cheongtaejeon tea which was produced without the inoculation of microbial strains, and those physiological activities in tea with the inoculation of L. plantarum CHO 25.

분말 녹차가 쌀밥의 관능적 특성에 미치는 영향 (Effect of Green Tea Powder on the Sensory Quality of Cooked Rice)

  • 신두호;이연화
    • 한국식품영양학회지
    • /
    • 제17권3호
    • /
    • pp.266-271
    • /
    • 2004
  • 쌀밥의 기능성을 강화할 목적으로 분말녹차를 0%, 0.5%, 1.0%, 2.0% 혼합하여 밥을 지어 분말녹차밥의 물성 및 관능적 특성을 실험하였다. 분말녹차밥의 수분함량은 분말녹차 첨가량이 많을수록 적었다. 쌀가루의 amylogram 특성은 분말녹차의 첨가량이 증가할수록 최고 점도는 감소하였으나 호화개시온도는 증가하는 경향을 나타냈다. 쌀전분의 팽윤력 및 용해도는 분말녹차첨가량이 증가할수록 감소하였다. 분말녹차밥의 색깔은 암녹색을 나타냈으며 분말녹차 첨가량이 증가할수록 어두워졌다. 분말녹차밥의 texture는 접착성은 분말녹차 첨가량이 증가할수록 떨어졌으나 응집성, 검성, 씹힘성, 경도는 증가하는 경향을 나타냈다. 관능검사 결과 밥알의 윤기, 퍼짐성, 차짐성, 경도는 흰쌀밥보다 낮게 평가되였으나 색깔은 2.0% 첨가가 그리고 향미, 전체적인 기호도에 있어서는 분말녹차 1.0%와 2.0% 첨가한 쌀밥이 좋은 점수를 얻었으나 서로간에 유의성은 없었다. 따라서 분말녹차밥을 지을 때 분말녹차 1.0% 첨가가 윤기, 퍼짐성, 차짐성, 경도 및 향미 등의 종합적인 관능 면에서 적절하다고 생각된다.

녹차분말 첨가가 다식의 품질 특성에 미치는 영향 (The Effect of Green Tea Powder on Quality of Dasik)

  • 윤근영;김명애;현지수
    • 한국식생활문화학회지
    • /
    • 제20권5호
    • /
    • pp.532-537
    • /
    • 2005
  • This study was carried out to clarify the effect of addition of green tea powder on Dasik quality. The green tea powder was added as the ratio of 0%, 2%, 4%, 6% and 8%, respectively. The physio-chemical analysis and sensory test on the Dasik were performed. The flour and starch Dasik added to green tea powder showed lower moisture content compared to the non-added treatment, but the ash content was higher in the added Dasik. At the color test, Dasik of green tea powder showed lower L, a, and b value than the non-added treatment, respectively. These values were greatly decreased as the amount of green tea powder was increased. Addition of green tea powder had a tendency to show high hardness, cohesiveness, springiness, and gumminess but brittleness was low in the non-added treatment. Therefore, addition of green tea powder made Dasik texture more dense, and this tendency of texture was distinct at the flour Dasik compared to the starch Dasik. At the sensory test, surface color and green tea flavor were strong as the adding amount of green tea was increased, but sweetness was weak. There were not significant differences in the overall preference among 0%, 2% and 4% treatments, but the preference was greatly decreased from the above 6%. In conclusion, 4% addition of green tea powder would be the useful method to enhance quality of Dasik, and the flour Dasik showed better result than the starch Dasik.