Difference between revisions of "Team:Kobe/HP/Gold Integrated"
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| − | <br/>Interview with Mr.Matsumoto: | + | <br/>Interview with Mr.Matsumoto: The owner of “Teppen” |
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<br /> They cultivate “Yabukita”, a type of tea plant usually used for green tea. | <br /> They cultivate “Yabukita”, a type of tea plant usually used for green tea. | ||
| − | <br /> We heard a lot of interesting and useful information related to our | + | <br /> We heard a lot of interesting and useful information related to our project. |
| − | <br /> Below is the information that we have gathered. | + | <br /> Below is the information that we have gathered there. |
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| − | In the case of tea without additives, the value of this ratio is about 0.2 or less. However, this ratio sometimes exceeds more than 0.4 in cases where the tea is containing the additive. | + | In the case of tea without additives, the value of this ratio is about 0.2 or less. However, this ratio sometimes exceeds more than 0.4 in cases where the tea is containing the additive. Glutamate is often added to enhance umami in Japanses green tea, but that taste is quite different from the original one(umami of theanine). Our theanine sensor can be used to detect additive in tea. |
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| − | Only the large scale facilities own the | + | Only the large scale facilities own the devices to analyze the components in tea. Therefore, small farms can't check their tea quality anytime they want. We realized again the importance of inexpensive way to measure the tea quality. |
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| − | Indeed, farmers stated about the decrease of sales of green tea. | + | Indeed, farmers stated about the decrease of sales of green tea.To promote the Japanese green tea in culture is important, but to make Japanese understand the health benefits brought by natural green tea is also important. </p> |
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| − | "Theanine sensor" would help appeal of it because Japanese people are | + | "Theanine sensor" would help attract the people appeal of it because Japanese people are to beverages with health claims good healthy benefits but these beverages are added by Theanine artificially. |
Natural green tea contains a lot of L-theanine. Our sensor will prove the fact to the public. | Natural green tea contains a lot of L-theanine. Our sensor will prove the fact to the public. | ||
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| − | After the interview, the owner allowed us to experience tea-picking and hand-rolling. | + | After the interview, the owner generously allowed us to experience tea-picking and hand-rolling. |
(Hand rolling is the primary process of making green tea) | (Hand rolling is the primary process of making green tea) | ||
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<img src="https://static.igem.org/mediawiki/2017/c/c1/T--Kobe--HP10.jpg"/> | <img src="https://static.igem.org/mediawiki/2017/c/c1/T--Kobe--HP10.jpg"/> | ||
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| − | Tea leaves | + | Tea leaves were heated to be soften. |
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<img src="https://static.igem.org/mediawiki/2017/8/88/T--Kobe--HP11.jpg"/> | <img src="https://static.igem.org/mediawiki/2017/8/88/T--Kobe--HP11.jpg"/> | ||
<figcaption> | <figcaption> | ||
| − | Hand-rolling | + | Hand-rolling todry tea leaves |
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<img src="https://static.igem.org/mediawiki/2017/a/a0/T--Kobe--HP12.jpg"/> | <img src="https://static.igem.org/mediawiki/2017/a/a0/T--Kobe--HP12.jpg"/> | ||
<figcaption> | <figcaption> | ||
| − | Green tea | + | Green tea was exposed in the sun. Dried tea leaves can be preserved for a long time. |
</figcaption> | </figcaption> | ||
</figure> | </figure> | ||
Revision as of 08:45, 30 October 2017
Integrated Human Practices
Interview with Mr.Matsumoto: The owner of “Teppen”
8 Oct. 2017
We visited a farm house, “Teppen” in Ehime prefecture in Japan.
The link of the inn
They cultivate “Yabukita”, a type of tea plant usually used for green tea.
We heard a lot of interesting and useful information related to our project.
Below is the information that we have gathered there.
o Most of the market green tea contains some additives.
They sometimes tastes marketed tea. Cheap or imported ones often contain the additive to enhance the taste of the tea.
Mr.Matsumoto saids he can test the amount of additives in tea by putting it overnight. If there are a lot of additives, the tea will turn into a milky color.
According to the following references, the custome of adding monosodium glutamate (MSG) into green tea is widely seen from Sanin Region through into the Hokuriku region in Japan.
後藤 哲久・堀江 秀樹・向井 俊博（2009），添加茶の化学成分による判別法（Japanese）
The grade of green tea can be determined by the ratio of glutamate content to the theanine content.
In the case of tea without additives, the value of this ratio is about 0.2 or less. However, this ratio sometimes exceeds more than 0.4 in cases where the tea is containing the additive. Glutamate is often added to enhance umami in Japanses green tea, but that taste is quite different from the original one(umami of theanine). Our theanine sensor can be used to detect additive in tea.
○The taste of green tea is often affected by various factors.
There are many factors that could change the taste of tea. The taste of tea is variable even if it is cultivated in the same way. For example,the factors include the difference of place like facing across the road, the degree of damage done by insects and the different way of how people processed the tea.
Only the large scale facilities own the devices to analyze the components in tea. Therefore, small farms can't check their tea quality anytime they want. We realized again the importance of inexpensive way to measure the tea quality.
○Decrease in consumption of green tea
According to the following references, the consumption of green tea in Japan is decreasing these days.
茶類の国内消費量の推移（Japanese）
Indeed, farmers stated about the decrease of sales of green tea.To promote the Japanese green tea in culture is important, but to make Japanese understand the health benefits brought by natural green tea is also important.
"Theanine sensor" would help attract the people appeal of it because Japanese people are to beverages with health claims good healthy benefits but these beverages are added by Theanine artificially. Natural green tea contains a lot of L-theanine. Our sensor will prove the fact to the public.
After the interview, the owner generously allowed us to experience tea-picking and hand-rolling. (Hand rolling is the primary process of making green tea)
Interview with the representative of cultivation of Benifuuki group
9 Oct. 2017
We interviewed with the representative of cultivation of Benifuuki group.
“Benifuuki” is a type of tea which is commonly used in black tea. But these days, it is also used in green tea because it contains a lot of Catechin which suppress the symptoms accompanying the allergy to pollen.
I learned interesting and useful information about our study from him.
Below are the itemized information that I have gathered.
○Lack of manpower due to aging
There are many tea plantations which have been left neglected for years. These days, they change their orange farms into tea plantation because tea is easier to grow. So they grow “Benifuuki” which is new breed and attracts people’s attention by suppressing the symptoms of hay fever. If the market of health tea will increase, the labor shortage will also be solved little by little.
○The necessity of small device which can measure the components of tea accurately
To measure the component analysis in a way that is publicly certified is difficult on a small scale. They said that the content of Catechin affect sales directly. The green tea in Nakazima which we visited contains a lot of Cathchin but they cannot appeal about this because its small scale. We believe that small biosensor will be able to measure the components of tea accurately and will be publicly certified.
”Benifuuki” prefer warmer climate than “Yabukita” and have tolerance to sea breeze.
Survey on tea culture
The purpose of the survey is to compare data green tea culture among different regions. We ask them 9 questions.
Percentage of individuals from different places who took the survey.
As indicated in the chart, Japan has the greater number of people who enjoys tea. For this data, enjoying the taste of tea has become a part of Japanese culture.
Even though enjoying the taste of green tea is a Japanese culture, green tea doesn’t have big market share in Japan compared to other region.
In all region, at least about 40% people think that health effect is a very important aspect when choosing tea and most of the people know that different type of tea have different effects on your health. There are many people in the world who are interested in health effect of tea. The day that Theanine gets a lot of attention like Catechin is near.
All the people who took the survey has already tasted the green tea and most of them know Japanese tea product. Japanese tea culture has higher name recognition than I thought.
Profile of theanine in Japan was higher compared to other regions. (Except for category other regions in which there are only two people in this category and they know Theanine.) There are some people who pointed out that Japanese has a lot of interest in the healthy beverage in the free-answer column of the survey. We agree with this opinion. They heard about theanine in various situations and was reported in a variety of media in Japan.
Organization Chart
- Ehime Prefecture International Center
Secretary‐general Ryo Takaoka - Matsuyama International Center（MIC）
Maki Mizuno - 愛媛県中予地方局商工観光室
Miyuki Yamanaka - 愛媛県港湾管理事務所
Our sincere thanks to these people!
