An exemplary oolong tea fermentation method comprises the following steps:
(1) Picking and sun-drying: spread the manually picked tea buds and leaves of the buds evenly on a withering trough with the spreading thickness of 10cm, ventilate and dissipate heat, and naturally wither for 20 hours at normal temperature;
(2) First fermentation: firstly, ferment at 30℃ and 95% humidity for 30 minutes; ; Then ferment for 40 minutes; At 28℃ and 95% humidity; Finally, under the condition of 30℃ temperature and 95% humidity, the fermentation was carried out for 32 minutes. ;
(3) Shake-green fermentation: Tea green rubs the leaf edge cells through the rubbing movement of a shaker or manual stirring, thus promoting enzymatic oxidation and causing a series of biochemical changes of fresh leaves. Through repeated shaking and cooling (that is, moving and static) for 4-5 times, lasting 8- 10 hour, the leaves are changed from hard to soft ("from birth to death"), which was called "eliminating green" in ancient times and reached "green leaves and red edges".
(4) charcoal baking: baking charcoal at 45℃ until it is 80% dry, and putting it away; Deactivating (frying) is to destroy the activity of enzyme with high humidity, inhibit the tea from continuing to ferment, so that it will not completely lose its odor and retain the unique fragrance of semi-fermented tea.
(5) Secondary fermentation: firstly, ferment for 30 minutes at the temperature of 28℃ and the humidity of 95%; ; Then ferment for 20 minutes; At 28℃ and 90% humidity; Finally, it was fermented at 26℃ and 95% humidity for 60min.
(6) First mechanical baking: after the second fermentation, the raw tea is cut into clean tea and baked in an electric oven at 90℃ for 10 hour;
(7) cooling: taking out the first batch of mechanically baked tea leaves and air drying;
(8) Second mechanical baking: baking in an electric oven at 80℃ for 50 hours; Charcoal drying and baking are the key to the unique taste of oolong tea. The general requirements of exergy are: slow baking at low temperature, low temperature for short time for high-grade tea, and high temperature for long time for low-grade tea.
(9) Selection: It is divided into mechanical selection and manual selection. Mainly to remove the troubles of rough deformation of tea leaves and pick out tea seeds and tea stems.
(10) preliminary forming
Extended data
The benefits of a cup of tea can be summarized as 15:
(1) Tea can refresh the mind and enhance the ability of thinking and memory.
(2) Tea contains many trace elements beneficial to human body? .
(3) Drinking tea can prevent senile cataract.
(4) Drinking tea can excite the central nervous system and enhance exercise ability.
(5) Tea can inhibit malignant tumor, and drinking tea can obviously inhibit the growth of cancer cells.
(6) Drinking tea has a good slimming and beautifying effect, especially oolong tea.
(7) Drinking tea can delay and prevent the formation of lipid plaque in vascular intima, and prevent arteriosclerosis, hypertension and cerebral thrombosis.
(8) Tea can eliminate fatigue, promote metabolism and maintain the normal functions of the heart, blood vessels and gastrointestinal tract.
(9) Drinking tea can inhibit cell aging and prolong life. The anti-aging effect of tea is more than 18 times that of vitamin e.
(10) Drinking tea is beneficial to prevent dental caries. A survey in Britain shows that children who drink tea regularly can reduce their dental caries by 60%.
(1 1) Tannic acid contained in tea can kill many kinds of bacteria, so it can prevent and treat stomatitis, pharyngolaryngitis, enteritis, dysentery, etc.
Drinking tea can protect people's hematopoietic function. Tea contains anti-radiation substances. Drinking tea while watching TV can reduce the harm of TV radiation and protect your eyesight.
(13) Drinking tea can maintain the normal acid-base balance of blood. Tea contains alkaloids such as caffeine, theophylline, theobromine and xanthine, and is an excellent alkaline drink. Tea can be quickly absorbed and oxidized during the extraction process, resulting in high concentration of alkaline metabolites, thus neutralizing acidic metabolites in the blood in time.
(14) heatstroke prevention and cooling. After drinking hot tea for 9 minutes, the skin temperature drops 1-2 degrees Celsius, which makes people feel cool and dry, while after drinking cold drinks, the skin temperature drops slightly.
(15) Drinking tea can enhance immune function. Scientists have found that an antibody compound contained in tea also appears in some germ cells, which will help the human body to establish a defense line against germs.
The composition and function of the second investigation;
Composition:
In recent years, scholars at home and abroad are very concerned about the relationship between drinking tea and human health. It is known that tea contains more than 350 chemical substances, such as tannic acid, VA, VC, VB and so on. Drinking tea can supplement some trace elements necessary for human body, and also has preventive and therapeutic effects on some diseases of human body.
Function:
Studies have shown that drinking tea can reduce blood viscosity, prevent thrombosis, reduce capillary permeability and fragility, lower serum cholesterol and increase high density lipoprotein, prevent cardiovascular diseases, and have the effects of anti-aging and enhancing immunity. Drinking more tea can make people excited, and has the functions of strengthening the heart, diuresis, convergence, sterilization and anti-inflammation. Drinking tea water for a long time can eliminate fatigue and enhance memory.
The purpose of nutritional immunology is to study how to improve human health through diet, so as to avoid getting cancer. "Many people know that coffee contains caffeine and can cause cancer. In fact, even decaffeinated coffee is harmful to human body. But friends who drink tea for a long time, don't secretly rejoice. Even the caffeine in oolong tea is higher than that in coffee. " This conclusion has aroused the vigilance of many people here.
The recent 1 research report pointed out that people who drink tea for a long time can reduce their waist circumference and hip circumference by 2cm, and their body fat content will be less than 20%!
Metabolic syndrome is a major disease that has been concerned and discussed by the international medical community for a long time, and it is also a common disease of abdominal obesity. "Metabolic syndrome" is a general term, including diabetes, hypertension, heart disease and cerebrovascular disease. These diseases * * * account for 27.6% of the main causes of death in Taiwan Province province 10, far exceeding 1 cancer!
Tea needs long-term drinking. It seems to be the voice of the people to solve the obesity problem in Zhongguang and the lower body. At the same time, we should maintain a healthy level! A few days ago, the influence of drinking tea for a long time on the proportion and distribution of body fat content pointed out a ray of dawn for many people who are trying to get rid of waist and abdomen fat. ?
Dr. Wu Zhixing pointed out in his research that tea extract may enhance the generation of heat energy, promote fat oxidation and 24-hour heat consumption rate, stimulate fat hydrolysis, and inhibit the activity of pancreatic lipolytic enzymes, thus affecting the body's fat mass.
The results show that people who have long-term tea drinking habits (drinking tea at least once a week for more than half a year 1 time) will have significantly less body fat content and abdominal fat than those who have never drunk tea. And the longer the habit of drinking tea, the more obvious the fat burning effect.
Especially compared with people who don't drink tea for more than 10 years, the body fat rate is reduced by about 20%, and the abdominal fat is reduced by about 2. 1%. For women, this is even more obvious: it has dropped by 30% and 5% respectively. So, if you haven't got into the habit of drinking tea, start at once! Nothing, drink more tea!
Most people know that catechins in tea have antioxidant effect, which can enhance human immunity and prevent aging, but do you know that fluoride in tea can also prevent tooth decay? Because tea can maintain the normal number of bacteria in the mouth, it can improve bad breath and prevent periodontal disease and tonsillitis. At the same time, catechin can also inhibit the activity of Helicobacter pylori and prevent gastritis and duodenal ulcer.
Drinking tea for a long time contains thousands of chemical components, which may affect the incidence of cardiovascular diseases, cancer, stroke and dyslipidemia. Dr. Wu Zhixing mentioned that the health diseases caused by obesity are quite extensive and may continue to increase.
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