CN106922865A - A kind of selenium-rich black tea and its processing method - Google Patents
A kind of selenium-rich black tea and its processing method Download PDFInfo
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Abstract
The present invention relates to a kind of selenium-rich black tea and its processing method, with tender shoots under the two or three leaf as raw material, by plucking, finishing, knead, it is sterilized, grow dim, rub again, charcoal is baked etc., and step prepares selenium-rich black tea.The present invention uses selenium-rich coronoid process dissipate capsule bacterium fermented tea, obtains selenium-rich black tea, the selenium element needed for human body can be supplemented after drinking daily, and low production cost, is more suitable for industrialized production.
Description
Technical field
The present invention relates to tea manufacture field, more particularly to a kind of selenium-rich black tea and its processing method.
Background technology
Selenium is the essential trace elements of the human body.Selenium participates in various selenoenzymes and Selenonic protein in synthesized human.Wherein paddy Guang
Sweet peptide peroxidase, is catalyzed hydroperoxides or MDA is changed into water or various alcohols in vivo, eliminates
Attack of the free radical to biomembrane, protects biomembrane from oxidative damage；Selenium can improve human immunity, promote the increasing of lymphocyte
Grow and antibody and immunoglobulin synthesis.Selenium has obvious to kinds cancers such as colon cancer, cutaneum carcinoma, liver cancer, breast cancer
The effect for suppressing and protecting, its mesostate methyl enol in body has stronger active anticancer.Selenium has simultaneously
Play the role of to mitigate and alleviate heavy metal toxicity.
Coronoid process dissipate capsule bacterium, the past only just found once in a while on ganoderma lucidum in thousand, the especially Fu in the black tea in Hunan Anhua
Grown and its dense in brick tea, this is the exclusive prebiotic strain of Hunan Anhua black tea, also cry overlord bacterium, this bacterium can be effective
Suppress intestinal cancer, stomach cancer, the diffusion of HCC.Under high magnified glass, ' golden flower ' is in golden yellow, for example spherical mushroom of shape, greatly
Quantifier elimination and clinical data show that effect of coronoid process dissipate capsule bacterium is very similar with lucidum spore powder in thousand, can be effective
Lifting human immunological competence, anti-cancer, anticancer, anti-oxidant, anti-aging make us promoting longevity, additionally, effect of fat-eliminating slimming is much
Surmount other any strains.
A kind of manufacture crafts of selenium-rich black tea of Chinese patent ZL201310297118.0, describe to dissipate capsule by spraying coronoid process
Bacterium conidia powder, the sodium selenite that will be sprayed on tealeaves change into Organic Selenium, and ferment the technique grown dim, and prepare selenium-rich black
Tea, operation is simple, but the approach by spraying, sodium selenite solution can not be with coronoid process dissipate capsule bacterium conidia powder on tealeaves
It is fully contacted, reduces the conversion ratio of Organic Selenium so that the bioavailability reduction of selenium, wastes raw material.
The disclosure of background above technology contents is only used for auxiliary and understands inventive concept of the invention and technical scheme, and it is not
Necessarily belong in the prior art of present patent application, the applying date of the above in present patent application is being shown without tangible proof
In the case of disclosed, above-mentioned background technology should not be taken to evaluate the novelty and creativeness of the application.
The content of the invention
Selenium element utilization rate in order to solve that human body selenium element intake is few, in Se rich tea is low, selenium-rich black tea production cost
High the problems such as, the present invention provides a kind of selenium-rich black tea and its processing method, to solve the above problems, moreover it is possible to increase selenium-rich black tea
Fragrance, there is more preferably sensory experience.
Therefore, the present invention provides a kind of selenium-rich black tea and its processing method, concrete technical scheme is as follows：
A kind of selenium-rich black tea, by fresh tea leaf, through plucking, finishing, knead, it is sterilized, grow dim, rub again, charcoal bakes step,
It is processed into selenium-rich black tea.
Preferably, described a kind of selenium-rich black tea, described selenium-rich black tea 3-8 parts, Jasmine 1.5-4 parts.
It is further preferred that a kind of described selenium-rich black tea, 5 parts of the selenium-rich black tea, 2.5 parts of Jasmine.
A kind of described selenium-rich black tea, the preparation process of the selenium-rich black tea is comprised the following steps：
S1 is plucked：Pluck lower fresh tea leaf；
S2 finishes：Fresh tea leaf is piled into 8-12cm tea heaps high, tealeaves is uniformly finished with 110 DEG C of steam, per 15min
Turning once, is repeated 2-3 times；
S3 is kneaded：By step S2 finish after tealeaves knead while hot, then by tea light pressure, be kneaded into bar slowly, tea juice overflow it is attached
In tealeaves surface；
S4 is sterilized：By the tealeaves obtained by step S3 with 99-120 DEG C of wet sterilization；
S5 grows dim：The sterilized tealeaves of step S4 is well mixed with yeast rich in selenium, it is high to pile 75-85cm, hair
Ferment 3-7 days, fermentation temperature is controlled at 35-55 DEG C；
S6 is rubbed again：Tealeaves after step S5 is grown dim is rubbed, rolled tightly again, is obtained final product；
S7 charcoals are baked：The tealeaves that step S6 was rubbed again pine charcoal is baked to moisture less than 7, obtains final product selenium-rich black tea.
Preferably, a kind of described selenium-rich jasmine black tea, the sterilizing time described in step S4 is 3-5min.
Preferably, described a kind of selenium-rich jasmine black tea, the Selenium-enriched fermentation bacterium described in step S5 is selenium-rich coronoid process dissipate capsule bacterium
With yeast rich in selenium with weight ratio be 5:1 mixing.
It is further preferred that a kind of described selenium-rich black tea, described yeast rich in selenium is fission yeast, Candida utilis ferment
Female bacterium, one kind of brevibacterium flavum.
Preferably, a kind of described selenium-rich black tea, the incubation step of the Selenium-enriched fermentation bacterium includes：In sterilized selenizing
Compound concentration for 1-3mg/L dextrose culture-medium in add account for culture medium gross weight 3-9% zymophyte, 25-35 DEG C, pH be
3.0-7.0 cultivates 16-24h, makes fermentation bacterium number living 8 × 109-9×109Individual/ml scopes, obtain final product Selenium-enriched fermentation bacterium.
It is further preferred that a kind of described selenium-rich black tea, the selenium compound be sodium selenite, one kind of sodium selenate or
Two kinds.
It is further preferred that a kind of described selenium-rich black tea, sugar culture-medium is constituted by the raw material of following parts by weight：Albumen
Peptone 0.4-4.8 parts, sodium chloride 5-15 parts, water 100-1000 parts, glycine 0.12-2.50 parts, potassium dihydrogen phosphate 0.06-0.65
Part, glucose 2-15 parts.
The present invention compared with prior art, has the advantages that：
1. the present invention uses Selenium-enriched fermentation coronoid process dissipate capsule bacterium black tea, and the organic selenium content allowed in black tea is greatly promoted, and
Growth has many coronoid process dissipate capsule bacterium also referred to as golden flower bacteriums beneficial to human body in black tea.
2. the present invention can effectively reduce the production cost of selenium-rich black tea.
3. the present invention is mixed using coronoid process dissipate capsule bacterium with one kind of fission yeast, candida utili bacterium, brevibacterium flavum
Fermentation, increased the content of protein in tealeaves.
Specific embodiment
First, the culture of Selenium-enriched fermentation bacterium
Cultural method 1
The culture of Selenium-enriched fermentation bacterium：Coronoid process dissipate capsule bacterium and fission yeast with weight ratio be 5:1 mixing；
Dextrose culture-medium is constituted by the raw material of following parts by weight：It is 0.4 part of peptone, 5 parts of sodium chloride, 100 parts of water, sweet
0.12 part of propylhomoserin, 0.06 part of potassium dihydrogen phosphate, 2 parts of glucose；
Addition accounts for the 3% of culture medium gross weight in sterilized concentration of sodium selenite is for the dextrose culture-medium of 1mg/L
Zymophyte, 25 DEG C, pH be 3.0 culture 16h, make fermentation bacterium number living 8 × 109-9×109Individual/ml scopes, obtain final product Selenium-enriched fermentation
Bacterium.
Cultural method 2
The culture of Selenium-enriched fermentation bacterium：Coronoid process dissipate capsule bacterium and candida utili bacterium with weight ratio be 5:1 mixing；
Dextrose culture-medium is constituted by the raw material of following parts by weight：4.8 parts of peptone, 15 parts of sodium chloride, 1000 parts of water,
2.50 parts of glycine, 0.65 part of potassium dihydrogen phosphate, 15 parts of glucose；
Account for culture medium gross weight 9% hair is added in sterilized selenic acid na concn is for the dextrose culture-medium of 3mg/L
Yeast-like fungi, 35 DEG C, pH be 7.0 culture 24h, make fermentation bacterium number living 8 × 109-9×109Individual/ml scopes, obtain final product Selenium-enriched fermentation bacterium.
Cultural method 3
The culture of Selenium-enriched fermentation bacterium：Coronoid process dissipate capsule bacterium and brevibacterium flavum with weight ratio be 5:1 mixing；
Dextrose culture-medium is constituted by the raw material of following parts by weight：2.5 parts of peptone, 10 parts of sodium chloride, 600 parts of water,
1.50 parts of glycine, 0.35 part of potassium dihydrogen phosphate, 8 parts of glucose；
It is 1 in sterilized sodium selenite, sodium selenate weight ratio:1 concentration is addition in the dextrose culture-medium of 2mg/L
Account for the 5% of culture medium gross weight zymophyte, 30 DEG C, pH be 5.0 culture 20h, make fermentation bacterium number living 8 × 109-9×109Individual/ml
Scope, obtains final product Selenium-enriched fermentation bacterium.
2nd, the specific processing of selenium-rich black tea and detection method
Embodiment 1
A kind of selenium-rich black tea, the preparation process of the selenium-rich black tea is as follows：
Plucking fresh tea leaf；Tealeaves is piled into 8cm tea heaps high, tealeaves is uniformly finished with 110 DEG C of steam, per 15min
Turning once, is repeated 2-3 times；Kneaded while hot after de-enzyme, by tea light pressure, be kneaded into bar slowly, tea juice is overflowed and invests surface,
Tealeaves can naturally be dried or do not dried；By tealeaves with 99 DEG C of wet sterilization 3min；By sterilized tealeaves and culture
The Selenium-enriched fermentation bacterium of the culture of method 1 is well mixed, and piles 75cm tea heaps high, ferments 3 days, and fermentation temperature is controlled at 35 DEG C；Will
Tea bar after growing dim is rubbed, rolled tightly again, and tea bar is baked to moisture 7% with pine charcoal, obtains final product selenium-rich black tea.
Detection Selenium Content in tea is carried out according to GB/t21729-2008, after tealeaves sample is through sour hot digestion, in 6mol/
In L hydrochloric acid mediums, the hexavalent selenium in sample is reduced into tetravalence selenium, with potassium borohydride as reducing agent, by tetravalence selenium in hydrochloric acid
Hydrogen selenide is reduced into medium, and is brought into by carrier gas atomization is carried out in atomizer, under selenium hollow cathode light irradiation, ground state
Selenium atom is excited to upper state, then deactivates when returning to ground state, launches the fluorescence of characteristic wavelength, and its fluorescence intensity contains with selenium
Amount is directly proportional, and compares quantitative with standard series.The Se content of selenium-rich black tea is 0.30mg/kg.
Embodiment 2
A kind of selenium-rich black tea, the preparation process of the selenium-rich black tea is as follows：
Plucking fresh tea leaf；It is tea heap 10cm high that tealeaves is piled into size, and tealeaves is uniformly finished with 110 DEG C of steam,
Per 15min turnings once, repeat 2-3 times；Kneaded while hot after de-enzyme, by tea light pressure, be kneaded into bar slowly, tea juice is overflowed and invested
Surface；Tealeaves is carried out into wet sterilization 5min at 120 DEG C；The Selenium-enriched fermentation bacterium that sterilized tealeaves and cultural method 2 are cultivated
It is well mixed, 80cm tea heaps high are piled, ferment 7 days, fermentation temperature is controlled at 55 DEG C；Tea bar after growing dim is rubbed again,
Roll tightly, tea bar is baked to moisture 5% with pine charcoal, obtains final product selenium-rich black tea.
Detection Selenium Content in tea is carried out according to GB/t21729-2008, after tealeaves sample is through sour hot digestion, in 6mol/
In L hydrochloric acid mediums, the hexavalent selenium in sample is reduced into tetravalence selenium, with potassium borohydride as reducing agent, by tetravalence selenium in hydrochloric acid
Hydrogen selenide is reduced into medium, and is brought into by carrier gas atomization is carried out in atomizer, under selenium hollow cathode light irradiation, ground state
Selenium atom is excited to upper state, then deactivates when returning to ground state, launches the fluorescence of characteristic wavelength, and its fluorescence intensity contains with selenium
Amount is directly proportional, and compares quantitative with standard series.The Se content of selenium-rich black tea is 0.38mg/kg.
Embodiment 3
A kind of selenium-rich black tea, the preparation process of the selenium-rich black tea is as follows：
Plucking fresh tea leaf；Tealeaves is piled into 12cm tea heaps high, tealeaves is uniformly finished with 110 DEG C of steam, per 15min
Turning once, is repeated 2-3 times；Kneaded while hot after de-enzyme, by tea light pressure, be kneaded into bar slowly, tea juice is overflowed and invests surface；Will
Tealeaves carries out wet sterilization 4min at 110 DEG C；The Selenium-enriched fermentation bacterium that sterilized tealeaves is cultivated with cultural method 3 mixes
It is even, 85cm tea heaps high are piled, ferment 5 days, fermentation temperature is controlled at 40 DEG C；Tea bar after growing dim is rubbed again, is rolled tightly, tea
Bar is baked to moisture 5% with pine charcoal, obtains final product selenium-rich black tea.
Detection Selenium Content in tea is carried out according to GB/t21729-2008, after tealeaves sample is through sour hot digestion, in 6mol/
In L hydrochloric acid mediums, the hexavalent selenium in sample is reduced into tetravalence selenium, with potassium borohydride as reducing agent, by tetravalence selenium in hydrochloric acid
Hydrogen selenide is reduced into medium, and is brought into by carrier gas atomization is carried out in atomizer, under selenium hollow cathode light irradiation, ground state
Selenium atom is excited to upper state, then deactivates when returning to ground state, launches the fluorescence of characteristic wavelength, and its fluorescence intensity contains with selenium
Amount is directly proportional, and compares quantitative with standard series.The Se content of selenium-rich black tea is 0.33mg/kg.
Embodiment 4
A kind of selenium-rich black tea, the preparation process of the selenium-rich black tea is as follows：
Plucking fresh tea leaf；Tealeaves is piled into 8cm tea heaps high, tealeaves is uniformly finished with 110 DEG C of steam, per 15min
Turning once, is repeated 2-3 times；Kneaded while hot after de-enzyme, by tea light pressure, be kneaded into bar slowly, tea juice is overflowed and invests surface；Will
Tealeaves carries out wet sterilization 4min at 105 DEG C；The Selenium-enriched fermentation bacterium that sterilized tealeaves is cultivated with cultural method 1 mixes
It is even, 75cm tea heaps high are piled, ferment 3 days, fermentation temperature is controlled at 35 DEG C；Tea bar after growing dim is rubbed again, is rolled tightly, tea
Bar is baked to moisture 6% with pine charcoal, obtains final product selenium-rich black tea.
Detection Selenium Content in tea is carried out according to GB/t21729-2008, after tealeaves sample is through sour hot digestion, in 6mol/
In L hydrochloric acid mediums, the hexavalent selenium in sample is reduced into tetravalence selenium, with potassium borohydride as reducing agent, by tetravalence selenium in hydrochloric acid
Hydrogen selenide is reduced into medium, and is brought into by carrier gas atomization is carried out in atomizer, under selenium hollow cathode light irradiation, ground state
Selenium atom is excited to upper state, then deactivates when returning to ground state, launches the fluorescence of characteristic wavelength, and its fluorescence intensity contains with selenium
Amount is directly proportional, and compares quantitative with standard series.The Se content of selenium-rich black tea is 0.34mg/kg.
Embodiment 5
A kind of selenium-rich black tea, the preparation process of the selenium-rich black tea is as follows：
Plucking fresh tea leaf；Tealeaves is piled into 10cm tea heaps high, tealeaves is uniformly finished with 110 DEG C of steam, per 15min
Turning once, is repeated 2-3 times；Kneaded while hot after de-enzyme, by tea light pressure, be kneaded into bar slowly, tea juice is overflowed and invests surface；Will
Tealeaves carries out wet sterilization 3.5min at 115 DEG C；The Selenium-enriched fermentation bacterium that sterilized tealeaves is cultivated with cultural method 2 mixes
It is even, 80cm tea heaps high are piled, ferment 7 days, fermentation temperature is controlled at 50 DEG C；Tea bar after growing dim is rubbed again, is rolled tightly, tea
Bar is baked to moisture 7% with pine charcoal, obtains final product selenium-rich black tea.
Detection Selenium Content in tea is carried out according to GB/t21729-2008, after tealeaves sample is through sour hot digestion, in 6mol/
In L hydrochloric acid mediums, the hexavalent selenium in sample is reduced into tetravalence selenium, with potassium borohydride as reducing agent, by tetravalence selenium in hydrochloric acid
Hydrogen selenide is reduced into medium, and is brought into by carrier gas atomization is carried out in atomizer, under selenium hollow cathode light irradiation, ground state
Selenium atom is excited to upper state, then deactivates when returning to ground state, launches the fluorescence of characteristic wavelength, and its fluorescence intensity contains with selenium
Amount is directly proportional, and compares quantitative with standard series.The Se content of selenium-rich black tea is 0.35mg/kg.
Embodiment 6
A kind of selenium-rich black tea, the preparation process of the selenium-rich black tea is as follows：
Plucking fresh tea leaf；Fresh tea leaf is dried, is added water in tealeaves and water ratio 10:2 mix rear heap 85cm high thoroughly, plus
The Selenium-enriched fermentation bacterium for entering the culture of cultural method 3 is fermented, and is fermented 5 days, and fermentation temperature is controlled at 40 DEG C, is dried naturally after fermentation
Obtain final product selenium-rich black tea.
Detection Selenium Content in tea is carried out according to GB/t21729-2008, after tealeaves sample is through sour hot digestion, in 6mol/
In L hydrochloric acid mediums, the hexavalent selenium in sample is reduced into tetravalence selenium, with potassium borohydride as reducing agent, by tetravalence selenium in hydrochloric acid
Hydrogen selenide is reduced into medium, and is brought into by carrier gas atomization is carried out in atomizer, under selenium hollow cathode light irradiation, ground state
Selenium atom is excited to upper state, then deactivates when returning to ground state, launches the fluorescence of characteristic wavelength, and its fluorescence intensity contains with selenium
Amount is directly proportional, and compares quantitative with standard series.The Se content of selenium-rich black tea is 0.07mg/kg.
3rd, clinical practice
1. the toxicity research of selenium-rich black tea
1.1 test specimens
Selenium-rich black tea granularity：Average 150nm
1.2 experimental animals
Big white mouse, body weight 150-170g or so, male and female half and half, Nanning animal feeding center provide
1.3 test methods
Every bag of 5g of selenium-rich black tea maximum, once a bag, three times per day, is calculated, equivalent to every by body weight 50kg for each person
Secondary 0.1g/kg.This is tested to 10 times that the consumption of big white mouse is human body, i.e. 0.1g/100g, after being diluted with a small amount of water, to great Bai
Mouse gavage, separately sets control group, to isometric drinking water, every group of male and female 8.Daily gavage three times, other feed for nursing shine
Often carry out, altogether gavage 6 weeks.A body weight is measured every two weeks, and observation animal is in process of the test situations such as activity, hair color, excrement
And abnormal conditions are recorded.Being taken a blood sample during off-test, (leukocyte count, red blood cell number, platelet count, net knit red to survey blood routine
Cell number, content of hemoglobin), renal function (urea nitrogen), liver function (total protein, albumin, GPT, TTT)
1.4 result of the tests and discussion
During 6 weeks feed, the average day's expenditure of feed is 13 ± 2g/, and it is 35 ± 5ml/ that amount of drinking water is per day, and category is just
Normal scope；Each group changes of weight increases without significant difference, category normal type.Situations such as big white mouse activity, hair color, excrement, is as good as
Often change, refers to table 1.
Selenium-rich black tea also has no significant effect to the blood routine of big white mouse, within normal physiologic range, refers to table 2.
Selenium-rich black tea also has no significant effect to Liver and kidney function, within normal physiologic range, refers to table 3.
Thus, selenium-rich black tea is drunk under conditions of 10 times of amounts in people, to big white mouse gavage 6 weeks, diet, body to big white mouse
Growth, blood routine, liver and renal function have no significant effect again.
Selenium-rich black tea is absorbed by stomach, improves tea component dissolution rate and bioavilability, pollution-free during processing, change
Property, it is ensured that its security；Se rich tea day the amount of drinking everyone be less than 15g, according to the Se content of selenium-rich black tea of the invention
0.35mg/kg is calculated, and is 52.5 micrograms per day for human beings selenium-supply amount, and the nutrition selenium supplement standard that the World Health Organization proposes is 50-250
Microgram, if selenium-rich black tea water all soaks out selenium, relatively low selenium-supply amount, will not cause selenosis in being also.
The each group big white mouse changes of weight situation of table 1
The each group big white mouse blood routine of table 2
The each group big white mouse Liver and kidney function of table 3
2. typical case
The selenium-rich black tea processed in embodiment 6 is drunk daily to sub-health population, periods of months.
Case 1
Wang, female, 42 years old, immune system disorder, frequent tonsillotome inflammation, throat swelled and ache, have foreign body sensation, daily send out this
Bright selenium-rich black tea is brewed drinks, first pass by boiling water pour into after boiling hot tea it is quick by tea to going out, then to pour into boiling water brewed
20min, tea is poured out and is drunk.After continuously drinking selenium-rich black tea of the invention 3 days, tonsillotome inflammation has been alleviated, swollen throat
Pain symptom is alleviated, and continues to drink selenium-rich black tea of the invention after 2 months, and physical function takes a turn for the better, and tonsillotome inflammation symptom disappears, larynx
Throat recovers normal.
Case 2
Zhang, man, 55 years old, has hypertension, every morning to be taken blood pressure after getting up, and blood pressure is more than 180 millimetress of mercury by step-down
Medicine is maintained, and brews selenium-rich black tea of the invention drink daily, first pass by boiling water pour into after boiling hot tea it is quick by tea to going out, then
The brewed 20min of boiling water is poured into, tea is poured out and is drunk.Selenium-rich black tea of the invention is continuously drunk after 1 month, the hypertension of Zhang
Symptom has been alleviated, and continues to drink selenium-rich black tea of the invention after 6 months, and rear blood pressure is 120 millimetress of mercury from Zhang's daily morning.
Case 3
It is high certain, man 38 years old, has a sweet tooth, and build is partially fat, hyperglycaemia, empty stomach whole blood blood glucose value 8.5mmol/L, daily
Selenium-rich black tea of the invention is brewed and is drunk, first pass quickly pours out tea after boiling water is poured into, then to pour into boiling water brewed
20min, tea is poured out and is drunk.Selenium-rich black tea of the invention is continuously drunk after 7 months, empty stomach whole blood blood glucose value is 6.2mmol/
L。
Case 4
Lee, female, 70 years old, due to older, ceruical uertebra part blood artery began with blocking and forms thrombus, and hand channel is often numb,
Daily brew selenium-rich black tea of the invention is drunk, and first pass quickly pours out tea after boiling water is poured into, then pours into boiling water bubble
20min processed, tea is poured out and is drunk.Selenium-rich black tea of the invention is continuously drunk after 2 months, the numb situation of hand take a favorable turn, then
After continuing to drink selenium-rich black tea of the invention, diminish before checking discovery ceruical uertebra part arterial thrombus relatively to hospital.
Case 5
Meng, man, 50 years old, back grew 0.5cm sarcomas, because length does not interfere with outward appearance in back, did not went to hospital to enter
Row treatment, selenium-rich black tea of the invention is brewed drink daily, and first pass is quickly poured out tea, then pour into after boiling water is poured into
The brewed 20min of boiling water, tea is poured out and is drunk.Selenium-rich black tea of the invention is continuously drunk after 1 month, sarcoma starts slowly to become
Small, sarcoma disappears after being further continued for drinking selenium-rich black tea of the invention.
Above content is to combine specific/preferred embodiment further description made for the present invention, it is impossible to
Assert that specific implementation of the invention is confined to these explanations.Come for general technical staff of the technical field of the invention
Say, without departing from the inventive concept of the premise, its embodiment that can also have been described to these makes some replacements or modification,
And these are substituted or variant should all be considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of selenium-rich black tea, it is characterised in that：Fresh tea passes, through plucking, finishing, knead, it is sterilized, grow dim, rub again, charcoal it is roasting
Step, is processed into selenium-rich black tea.
2. a kind of selenium-rich black tea as claimed in claim 1, it is characterised in that：Described selenium-rich black tea 3-8 parts, Jasmine 1.5-4
Part.
3. a kind of selenium-rich black tea as claimed in claim 2, it is characterised in that：5 parts of the selenium-rich black tea, 2.5 parts of Jasmine.
4. a kind of selenium-rich black tea as any one of claim 1-3, it is characterised in that the preparation of the selenium-rich black tea
Journey is comprised the following steps：
S1 is plucked：Pluck lower fresh tea leaf；
S2 finishes：Fresh tea leaf is piled into 8-12cm tea heaps high, tealeaves is uniformly finished with 110 DEG C of steam, per 15min turnings
Once, repeat 2-3 times；
S3 is kneaded：By step S2 finish after tealeaves knead while hot, then by tea light pressure, be kneaded into bar slowly, tea juice overflow invest tea
Leaf surface；
S4 is sterilized：By the tealeaves obtained by step S3 with 99-120 DEG C of wet sterilization；
S5 grows dim：The sterilized tealeaves of step S4 is well mixed with yeast rich in selenium, it is high to pile 75-85cm, ferment 3-7
My god, fermentation temperature is controlled at 35-55 DEG C；
S6 is rubbed again：Tealeaves after step S5 is grown dim is rubbed, rolled tightly again, is obtained final product；
S7 charcoals are baked：The tealeaves that step S6 was rubbed again pine charcoal is baked to moisture less than 7, obtains final product selenium-rich black tea.
5. a kind of selenium-rich jasmine black tea as claimed in claim 4, it is characterised in that：Sterilizing time described in step S4 is 3-
5min。
6. a kind of selenium-rich jasmine black tea as claimed in claim 4, it is characterised in that：Selenium-enriched fermentation bacterium described in step S5 is rich
Selenium coronoid process dissipate capsule bacterium and yeast rich in selenium with weight ratio be 5:1 mixing.
7. a kind of selenium-rich black tea as claimed in claim 6, it is characterised in that：Described yeast rich in selenium is fission yeast, produces
Protein candidiasis, one kind of brevibacterium flavum.
8. a kind of selenium-rich black tea as claimed in claim 4, it is characterised in that：The incubation step of the Selenium-enriched fermentation bacterium includes：
The fermentation of the 3-9% for accounting for culture medium gross weight is added in sterilized selenium compound concentration is for the dextrose culture-medium of 1-3mg/L
Bacterium, 25-35 DEG C, pH be that 3.0-7.0 cultivates 16-24h, make fermentation bacterium number living 8 × 109-9×109Individual/ml scopes, obtain final product selenium-rich
Zymophyte.
9. a kind of selenium-rich black tea described in claim 8, it is characterised in that：The selenium compound is sodium selenite, sodium selenate
One or two.
10. a kind of selenium-rich black tea as claimed in claim 8, it is characterised in that：Sugar culture-medium presses the raw material of following parts by weight
Composition：Peptone 0.4-4.8 parts, sodium chloride 5-15 parts, water 100-1000 parts, glycine 0.12-2.50 parts, potassium dihydrogen phosphate
0.06-0.65 parts, glucose 2-15 parts.
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