• The Korean Journal of Food And Nutrition
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• v.14 no.4
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• pp.311-316
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• 2001

This study was designed to investigate the effective ratio of healthy bread wish green tea powder. The weight. volume, and colon difference of bread with various contents of green tea powder were measured. And the picture of bread and the panel test were taken. To avoid the decrease of volume, the experiment was taken with active gluten. The weight to bread was increased and the volume was decreased significantly according to increase of green tea powder ratio. But, the volume of the group with active gluten(3%+ and 4%+) was higher than that of the group with green tea powder 2%. That is which the correction of the volute was taken by active gluten in green tea powder bread. In the result of panel test and volume measurement. addition of 3% green tea powder was appropriate, and the addition of active gluten corrected the decrease of volume. Therefore. using the green tea powder, the diversity of bread by functionality, nutritional composition. taste, color. flavor of green tea powder can be developed. This result will support the background the development of green tea bread of good quality.

• Culinary science and hospitality research
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• v.14 no.4
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• pp.1-13
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• 2008

The antioxidant activity and quality characteristics of bread made from waxy black rice flour(WBRF) and green tea powder were investigated. The bread was manufactured with 1% of green tea powder and 10, 20, 30 or 40% of WBRF(w/w). The group of 40% of WBRF and green tea powder significantly showed the highest bread weight and volume. Lightness(L value) and yellowness(b value) decreased, but redness(a value) increased with increasing WBRF contents in mixture. Hardness, gumminess and chewiness were the lowest in the control group, but springiness was the lowest in the group of 40% of WBRF and 1% of green tea powder. The sensory scores of appearance, external and crumb color, grainy in the group of 40% of WBRF and 1% of green tea powder were the significantly lowest. Overall acceptabilities of the groups of 10% and 30% of WBRF with 1% of green tea powder were not significantly different from the control group. The group of 40% of WBRF and 1% of green tea powder showed the highest DPPH radical scavenging effect and TEAC content. Thus, if the mixture of green tea powder and WBRF would be used, it might be proper to use 1% of green tea powder and 10% of WBRF mixture considering the quality and antioxidant activity of bread.

• Journal of the East Asian Society of Dietary Life
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• v.10 no.5
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• pp.411-418
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• 2000

The purpose of this study was to investigate the sensory and mechanical characteristics of mayonnaise containing various levels of green tea powder The highest viscosity of mayonnaise was obtained at the green tea powder concentration of 0.5% The emulsion, stability was increased with the addition of green tea powder. In the sensory evaluation, overall acceptabilty appeared to be the highest when 0.1% of green tea powder was added. There was a significant difference between the samples (P<.05) In terms of change in color, the values of L, a, b, and ΔE decreased as the amount of green tea powder increased. In the measurement of the texture, the hardness of mayonnaise was highest in the control of green tea powder, and the springiness appeared to be higher in the mayonnaise with 0.1% of green tea powder. The odor acceptabilty in the sensory evaluation showed a negative correlation with the values of gumminess in the mechanical characteristics. The subjective parameters that affect overall quality on sensory evaluation were determined by, and they were odor acceptabilty, after taste, oily taste, sour odor. sweet taste. egg odor, color acceptabilty, and salty taste. These results showed that mayonnaise made with 0.1% green tea powder, salad oil 474.5ml. egg golk 85g, sugar l0g, salt 7g, and vinegar 23m1 with the addition of 0.6g green tea powder was the most effective compared with other treatments.

• Korean journal of food and cookery science
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• v.20 no.1
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• pp.112-118
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• 2004

The purpose of this study was to find the optimal mixing conditions of three different amounts of gelatin, green tea powder and sucrose for preparation green tea powder jelly. A central composite design involving gelatin(12 ∼ 16g), green tea powder(3∼5g) and sucrose(40∼60g) was used to investigate the sensory characteristics of green tea powder jelly. Sensory characteristics, such as hardness, elasticity, sweetness, transparency, color, flavor and overall quality of green tea powder jelly, were measured using a response surface methodology computer program. The overall optimal conditions that satisfied all the sensory properties of green tea powder jelly were 13.4g gelatin, 4.2g green tea powder and 50.8g sucrose.

• Korean journal of food and cookery science
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• v.17 no.3
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• pp.246-254
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• 2001

Effects of added green tea powder and Angelica keiskei powder on the quality characteristics of Yukwa were examined for the purpose of improving functioanality and variety of Yukwa, and usage of green tea Powder and Angelica keiskei. Dietary fiber contents of green tea powder were 5.2% soluble dietary fiber, 22% insoluble dietary fiber, while Angelica keiskei contained 28.9% soluble dietary fiber, 29.6% insoluble dietary fiber. Expansion rate of yukwa was 3,675% for control and the rates were slightly decreased as the addition level increased. Although Yukwas added 6% green tea and angelica keiskei powder were harder than the others when determined by rheometer, sensory evaluation results showed that hardness and mouthfeel were soft without any significant difference among the control and experimental samples. And internal structure of 4 and 6% green tea powder and those added angelica keiskei at three levels were evaluated by sensory panel as moderately compact. Overall acceptability of yukwa added 2% green tea Powder was the best of all while yukwas added angelica keiskei at three levels were evaluated as good. The results of peroxide value and TBA value showed that green tea powder had stronger antioxidative property than angelica keiskei. In conclusion addition of green tea powder by 2% level and angelica keiskei powder up to 4% would give us beneficial effects in the aspects of functionality and storage life of yukwa without any detrimental effects on the quality characteristics of it.

• Journal of the Korean Society of Food Science and Nutrition
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• v.28 no.6
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• pp.1244-1250
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• 1999

Job,s tears powder and green tea powder were added to bread mixture and their effects on the quality of bread were investigated using sensory evaluation and some physical tests. Sensory evaluation showed that flavor, hardness and chewiness were increased as the amount of Job's tears powder and green tea powder was increased. Lightness and redness values decreased with the addition of Job's tears powder and green tea powder, while yellowness values increased. Texture measurement showed that springiness was highest in bread with 3% green tea powder among the batches tested, while gumminess showed highest in control. Hardness of 3% green tea powder was lower than that of control. It appears that the higher the moistness, the higher the value of redness. Chewiness was positively correlated with yellowness. Gumminess was negatively correlated with color and flavor. Bread with 1% green tea powder and 10% Job's tears powder showed good overall preference. Scanning electron microscopy revealed that the addition of Job's tears powder and green tea powder to bread exhibited small pores and crude surface.

• Journal of the Korean Home Economics Association
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• v.34 no.3
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• pp.233-243
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• 1996

The purpose of this study was to investigate effect of the amounts of unpolished glutinous rice flour with green tea powder difference of adding method on the sensorty and objective characteristics of Heunmi-nokcha-injulmi which is KOREAN TRADITIONAL CAKE supplemented with green tea. The results were as follow: According to sensory evaluation of Heunmi-injulmi adding twice infused green tea powder, the acceptance was the bast in the hardness, moistness, chewiness, and overall quality when adding 6% green tea. The more the amount of two infused green tea power was increased, the more the hardness of Heunmi-injulmi was increased in the gextural profiles, whereas the cohesiveness, elasticity, and chewiness of those was decreased. The moisture content of Heunmi-injulmi adding infused green tea powder was ranged to 41-44%, and it was decreased as the amount of two infusedgreen tea powder be increased. The more the amount of adding green tea powder was increased, the more yellow and green color was changed darker and stronger. The Overall quality in the sensory measurement of Heunmi-injulmi adding two infused green tea powder had positive correlation with Adhesiveness in the measurement of food testing machine. Refer to this study with the advisable recipe for Heunmi-nokcha-injulmi as follow : Heunmi-nokcha-injulmi adding 282g(94%) unpolished glutinous rice flour and 18g (6%) two infused green tea powder.

• The Korean Journal of Food And Nutrition
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• v.17 no.3
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• pp.266-271
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• 2004

In this study, rice was cooked with 0%, 0.5%, 1.0% and 2.0% green tea powder content to improve functionality of cooked rice. The effects of green tea powder content on the physical, texture and sensory characteristics of cooked rice were examined. Moisture contents of cooked rice with green tea powder were decreased with increasing amounts of added green tea powder. Initial pasting temperature of rice powder was showed an increase with increasing amounts of added green tea powder, besides peak viscosity was decreased. The solubility and swelling power were decreased with increasing amounts of added green tea powder. The color of cooked rice was darkened gradually with the increasing amounts of added green tea powder, and showed the dark green. Sensory adhesiveness was gradually decreased with the increasing amounts of added green tea powder, and cohesiveness, gummness, chewiness and hardness were increased. Sensory glassiness, overcook, stickiness and hardness had lower score than control group, but sensory color, flavor and overall acceptability had higher score with addition of 1.0% and 2.0% green tea powder. Concludingly, in items of overall sensory, cooked rice with 1.0% green tea powder showed the best result.

• Journal of the Korean Home Economics Association
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• v.34 no.2
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• pp.329-339
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• 1996

The purpose of this study was to investigate effect of the amounts of unpolished glutinous rice flour with green tea powder difference of adding amount on the sensory and objective characteristics of Heunmi-nokcha-injulmi which is KOREAN TRADITIONAL RICE CAKE supplemented with green tea. The results were as follow : According to sensory evaluation of Heunmi-injulmi, the score of the color, flavor, chewiness, and overall of adding green tea were higher than those of no-adding green tea, especially the best acceptance was shown in adding 2% green tea. The more the amount of green tea powder was increased, the more the hardness and gumminess of Heumni-injulme was increased in the textural profiles, whereas the cohesiveness and elasicity of those was decreased. The moisture content of Heunmi-injulme adding green tea powder was ranged to 42-45%, and it was increased as the amount of green tea powder be increased. The more the amount of adding green tea powder was increased, the more yellow and green color was changed darker and stronger. Refer to this study with the advisable recipe for as follow : Heunmi-nokcha-injulmi adding 294g(98%) unpolished glutinous rice flour and 6g(2%) green tea powder.

• Journal of the Korean Society of Food Culture
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• v.20 no.1
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• pp.103-112
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• 2005

The objective of this study was to clarify the effect of addition of green tea powder(0%, 2%, 4%, 6%, 8%) to Yackwa on quality and preservation. Addition of 4% green tea powder turned out to give positive effect on expansion. In test of physical characters, addition of green tea powder had a tendency to lower hardness, cohesiveness, springness and gumminess but to enhance brittleness. Considering the rancidity of oil within Yackwa, addition of green tea powder tended to show lower acid value and peroxide value than non-added treatment but its difference was slight. At the sensory test, surface color, bitterness and green tea flavor were strong but sweet and savory taste weak when green team powder was added(p<0.05). Overall quality appeared to have improved to 5.55 points which is compared to non-addition when the powder was added 4%(p<0.05). In conclusion, 4% addition of green tea powder would be the usefull method to enhance preference and quality of Yackwa.