CN1415740A - Drying production technique by bran adsorption for drying oceanic rhodotorula - Google Patents
Drying production technique by bran adsorption for drying oceanic rhodotorula Download PDFInfo
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- ocean rhodotorula
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Abstract
A bran-adsorption process for drying solid marine rhodotorule features use of continuous stream plus deep aeration culture and bran-adsorption drying. The resultant has high concentration of rhodotorula cells (5-10 billions/g), high output rand high living cell percentage (30%). It can be used to raise prawn or marine crab for high surviral rate, health level and raising efficiency.
Description
Technical field
The present invention relates to a kind of production method of ocean rhodotorula, particularly a kind of wheat bran adsorption dry production method of solid ocean rhodotorula.
Background technology
Ocean rhodotorula is widely used at present as a kind of biological feed in growing seedlings of fishery products such as shrimps, crab class, shellfish and the adult breed.Chinese patent discloses a kind of denomination of invention and has been " live single-cell sea red-yeast ecological bait and production method thereof ", and publication number is CN1146290A, and open day is on April 24th, 1997.This invention discloses the production method of ocean rhodotorula yeast culture and liquid product in specification sheets, this method relates to a kind of ocean rhodotorula separates, makes after once feed intake liquid fermenting, the post-processed liquid product from occurring in nature method.This method exists the speed of growth of ocean rhodotorula slow, and the production cycle is long, and the cell concn of the ocean rhodotorula that of fermenting is low, and the final liquid product quality guaranteed period is short, needs refrigeration to wait the shortcoming that is unfavorable for scale operation, prolonged preservation and long-distance transport.
Summary of the invention
The purpose of this utility model is exactly the wheat bran adsorption dry production method that a kind of solid ocean rhodotorula will be provided, its adopts the ventilate method of continuous feeding culture ocean rhodotorula of deep liquid, improved the output of ocean rhodotorula, made it can carry out industrialized production.And on post-processed, adopt wheat bran adsorption dry method, can obtain having certain active ocean rhodotorula solid phase prod, thereby the quality guaranteed period of ocean rhodotorula product is prolonged, reach the purpose of convenient transportation.
The purpose of this utility model is achieved in that
The microorganism of using
The microbial strains that is used for producing ocean rhodotorula solid phase prod of the present invention is for sticking rhodotorula, and the Latin formal name used at school is Rhodotorula glutinis.The bacterial classification purposes is food and fodder yeast.Bacterial classification is available from Chinese industrial microbial strains preservation center, and deposit number is CGMCC No.2.703.
Glutinous rhodotorula bacterial strain has following character
1, morphological specificity
Circle or oval, individual less, be about 3-4.2*4-5.4um.Microscopically can be seen typical yeast vacuole.
2, the feature on substratum
30 ℃ cultivate inoculation after, observed in 24 hours, in wort liquid is cultivated,, and do not break away from after the polygon budding of cell if it is very slow to leave standstill then growth, a circle Pu shape thing is arranged in the place near liquid level, shake bottle or air agitation fermentation microscopy and then mostly be individual cells.
30 ℃ cultivate inoculation after, observed in 48 hours, the chromatogram (nineteen fifty-seven version) of publishing with Science Press is as the standard of color description.Be the circular bacterium colony of scarlet on the wort agar substratum, the surface is glossy, and neat in edge is opaque, and long have bump in the middle of the later stage bacterium colony.
3, physiological and biochemical property
(1) fermenting carbohydrate: glucose-maltose-semi-lactosi-sucrose-lactose-Mi disaccharides-melizitose-synanthrin-Zulkovsky starch-
(2) assimilation carbon source: glucose+lactose-ethanol-maltose+sucrose+Zulkovsky starch-semi-lactosi-Mi disaccharides-L-arabinose-
(3) assimilation nitrogenous source: saltpetre+ammonium sulfate+urea+Sodium Nitrite-L-Methionin+
(4) assimilation inositol :-
(5) produce the kind of starch compound :-
(6) decomposing urea :+
(7) produce the ester reaction :-
(8) anti-height oozes reaction: 50% glucose+60% glucose-
(9) anti-ethanol: 3%
(10) fatal temperature: 56 ℃
4, utilization of carbon source
Glucose maltose sucrose
The production method of solid ocean rhodotorula of the present invention may further comprise the steps:
(1) going down to posterity of bacterial classification: bacterial classification adopts the inclined-plane to go down to posterity, and substratum is the wort agar substratum of 8-12Be, and culture temperature is 26 ℃-31 ℃, and incubation time is 26-72 hour, and to growing pink circular bacterium colony, colony diameter is 1-2mm;
(2) strain expanded culture: the bacterial classification of (1) step is connected in the triangular flask of the wort nutrient solution that the sterilized 8-12Be of 150ml is housed, at 26 ℃-31 ℃, carried out under the 100-250rpm condition shake-flask culture 36-48 hour, insert then in the Ka Shi jar of two wort aseptic culture fluids that 20 liters of 8-12Be respectively are housed, 26 ℃ of-31 ℃ of magnetic agitation were cultivated 36-48 hour, again two Ka Shi jar bacterial classifications are inserted in the pure culture fermentor tank that 3-5 ton substratum is housed of having sterilized, 26 ℃ of-31 ℃ of aeration-agitations were cultivated 36-48 hour, and air flow is controlled at 90-130m
3/ hr;
(3) the continuous feeding culture of fermentation deep ventilation: under aseptic condition, the seed liquor of turning out is inserted fermentor tank, 26 ℃-31 ℃ of controlled temperature, aeration-agitation was cultivated 30-48 hour, and air flow is controlled at 90-130m
3/ hr, continuing to flow simultaneously adds carbon source and nitrogenous source.Carbon source is sucrose or glucose, and concentration is 2%-5% (weight ratio), and nitrogenous source is urea, ammonium sulfate or saltpetre, and concentration is 0.1%-0.3% (weight ratio);
(4) separating, washing concentrates: under the separating machine of 3000-5000rpm rotating speed fermented liquid is concentrated, yeast-lactic after concentrating concentrates after dissolving with tap water once more, to with ocean rhodotorula thalline washes clean, the storage tank cryopreservation of the yeast-lactic behind the thickening and washing;
(5) drying: with wheat bran and the breast of the ocean rhodotorula after concentrating by 1: 1-2: 1 (weight ratio) mixed, and on fixedly low temperature is dried drying bed under 28 ℃-45 ℃ temperature dry 24-36 hour, gets product.
The culture medium prescription of pure culture fermentor tank and fermentor tank is: (weight ratio)
Glucose 2-5%
Magnesium sulfate heptahydrate 0.05-0.25%
Yeast extract 0.1-0.3%
Potassium primary phosphate 0.5-1%
Urea 0.1-0.3%
Ammonium sulfate 0.05-0.2%
Saltpetre 0.05-0.2%
PH value 4.0-6.0
The temperature of medium sterilization is 121 ℃, and the time is 30 minutes.
The solid ocean rhodotorula that adopts the present invention to produce has following feature:
1, shape: be by wheat bran and the red flour that mixes of the ocean rhodotorula after concentrating.
2, form: wheat bran content is 90%-96% (weight ratio) in the product, and ocean rhodotorula content is 4%-10% (weight ratio).
3, biological activity: the ocean rhodotorula cell concn is 50-100 hundred million/gram in the product, and cytoactive is 20%-40%.
The present invention is owing to adopt the ventilate production method of continuous feeding culture ocean rhodotorula of deep liquid, so that the output of ocean rhodotorula increases substantially, bring up to 20-30 hundred million/ml by original 5-10 hundred million/ml; Owing to adopt wheat bran adsorption dry method, the liquid ocean rhodotorula after concentrating is dried to the solid ocean rhodotorula again, is keeping having improved the preservation period of product on the certain active basis of ocean rhodotorula like this, and be convenient to transportation.The product that the present invention produces by the result of use in prawn culturing as can be seen, it has improved the state of health of prawn, reduces the mortality ratio of prawn, has improved the quality of prawn, for the shrimp farming has brought economic benefit.
Below with regard to manufacturing of the present invention, the test example illustrate.
Production Example 1
At substratum is on the wort agar substratum test tube slant of 8Be, will stick the rhodotorula bacterial classification and be inoculated on aseptic condition in this substratum, and the control culture temperature is 30 ℃, cultivates 48 hours, and to grow pink circular bacterium colony, colony diameter is 1.5mm.Then above-mentioned bacterial classification is connected under aseptic condition in two 500ml triangular flasks, (dress 150ml wort nutrient solution in the triangular flask) carries out enlarged culturing, 30 ℃ of control culture temperature, and shake-flask culture is 48 hours under 200rpm.Above-mentioned triangular flask bacterial classification is inserted respectively in the Ka Shi jar of two wort aseptic culture fluids that 20 liters of 8Be respectively are housed, 30 ℃ of magnetic agitation were cultivated 48 hours again.At last above-mentioned cultured Ka Shi jar seed is inserted the aerobic fermentation that once feeds intake in the pure culture jar that 5 tons of substratum are housed of having sterilized and cultivate, controlled temperature is 27 ℃, and air flow is 100m
3/ hr, cultivated 48 hours, culture medium prescription is: glucose 2%, magnesium sulfate heptahydrate 0.25%, yeast extract 0.2%, potassium primary phosphate 0.5%, urea 0.3%, ammonium sulfate 0.05%, saltpetre 0.05%, pH value are 4.0-6.0, and substratum was sterilized 30 minutes down at 121 ℃.
With 5 tons in above-mentioned seed, all insert in 100 tons the fermentor tank and carry out continuous feeding culture, 27 ℃ of controlled temperature, air flow are 100m
3/ hr, Continuous Flow adds 2% sucrose and 0.3% urea in the cultivation, cultivates 48 hours.Culture medium prescription is: glucose 2%, magnesium sulfate heptahydrate 0.25%, yeast extract 0.2%, potassium primary phosphate 0.5%, urea 0.3%, ammonium sulfate 0.05%, saltpetre 0.05%, pH value are 4.0-6.0, and substratum was sterilized 30 minutes down at 121 ℃.After the fermentation ends, fermented liquid is pumped into the high speed butterfly chip separating machine (model is FEUX510, ALFA-LAVAL produce) of import, under the rotating speed of 4000rpm, fermented liquid is concentrated, yeast-lactic after concentrating concentrates after dissolving with tap water once more, can be with ocean rhodotorula thalline washes clean.Yeast-lactic behind the thickening and washing is delivered to the storage tank cryopreservation with transferpump.Ocean rhodotorula breast after 2 tons of wheat brans and 1 ton concentrated mixes, (model is PG-500 to drying bed in that fixedly low temperature is dried, pharmacy plant and instrument factory produces in Wenzhou) go up with under 28 ℃ the temperature dry 36 hours, can obtain 1.6 tons of solid ocean rhodotorulas, wheat bran content 94% (weight ratio) wherein, ocean rhodotorula content 6% (weight ratio), the activity of ocean rhodotorula is 30% in this product, cell concn reaches 10,000,000,000/gram.
The said products is bundled into 500 gram or 10 kilograms products, is put in shady and cool dry place, can effectively preserve 2 years.
Production Example 2
At substratum is on the wort agar substratum test tube slant of 10Be, will stick the rhodotorula bacterial classification and be inoculated on aseptic condition in this substratum, and the control culture temperature is 26 ℃, cultivates 26 hours, and to grow pink circular bacterium colony, colony diameter is 1mm.Then above-mentioned bacterial classification is connected under aseptic condition in two 500ml triangular flasks, (dress 150ml wort nutrient solution in the triangular flask) carries out enlarged culturing, 26 ℃ of control culture temperature, and shake-flask culture is 36 hours under 100rpm.Above-mentioned triangular flask bacterial classification is inserted respectively in the Ka Shi jar of two wort aseptic culture fluids that 20 liters of 10Be respectively are housed, 26 ℃ of magnetic agitation were cultivated 36 hours again.At last above-mentioned cultured Ka Shi jar seed is inserted the aerobic fermentation that once feeds intake in the pure culture jar that 3 tons of substratum are housed of having sterilized and cultivate, controlled temperature is 26 ℃, and air flow is 90m
3/ hr, cultivated 36 hours, culture medium prescription is: glucose 3.5%, magnesium sulfate heptahydrate 0.15%, yeast extract 0.1%, potassium primary phosphate 0.75%, urea 0.2%, ammonium sulfate 0.10%, saltpetre 0.10%, pH value are 4.0-6.0, and substratum was sterilized 30 minutes down at 121 ℃.
With 3 tons in above-mentioned seed, all insert in 100 tons the fermentor tank and carry out continuous feeding culture, 26 ℃ of controlled temperature, air flow are 90m
3/ hr, Continuous Flow adds 3% sucrose and 0.2% urea in the cultivation, cultivates 30 hours.Culture medium prescription is: glucose 3.5%, magnesium sulfate heptahydrate 0.15%, yeast extract 0.1%, potassium primary phosphate 0.75%, urea 0.2%, ammonium sulfate 0.10%, saltpetre 0.10%, pH value are 4.0-6.0, and substratum was sterilized 30 minutes down at 121 ℃.After the fermentation ends, fermented liquid is pumped into the high speed butterfly chip separating machine of import, and (model is that model is FEUX510, ALFA-LAVAL produces), under the rotating speed of 3000rpm, fermented liquid is concentrated, yeast-lactic after concentrating concentrates after dissolving with tap water once more, can be with ocean rhodotorula thalline washes clean.Yeast-lactic behind the thickening and washing is delivered to the storage tank cryopreservation with transferpump.Ocean rhodotorula breast after 1 ton of wheat bran and 1 ton concentrated mixes, (model is the PG-500 boiling-bed drying to drying bed in that fixedly low temperature is dried, pharmacy plant and instrument factory produces in Wenzhou) go up with under 35 ℃ the temperature dry 24 hours, can obtain 0.9 ton of solid ocean rhodotorula, wheat bran content 96% (weight ratio) wherein, ocean rhodotorula content 4% (weight ratio), the activity of ocean rhodotorula is 20% in this product, cell concn reaches 5,000,000,000/gram.
The said products is bundled into 500 gram or 10 kilograms products, is put in shady and cool dry place, can effectively preserve 2 years.
Production Example 3
At substratum is on the wort agar substratum test tube slant of 12Be, will stick the rhodotorula bacterial classification and be inoculated on aseptic condition in this substratum, and the control culture temperature is 31 ℃, cultivates 72 hours, and to grow pink circular bacterium colony, colony diameter is 2mm.Then above-mentioned bacterial classification is connected under aseptic condition in two 500ml triangular flasks, (dress 150ml wort nutrient solution in the triangular flask) carries out enlarged culturing, 31 ℃ of control culture temperature, and shake-flask culture is 45 hours under 250rpm.Above-mentioned triangular flask bacterial classification is inserted respectively in the Ka Shi jar of two wort aseptic culture fluids that 20 liters of 12Be respectively are housed, 31 ℃ of magnetic agitation were cultivated 45 hours again.At last above-mentioned cultured Ka Shi jar seed is inserted the aerobic fermentation that once feeds intake in the pure culture jar that 4 tons of substratum are housed of having sterilized and cultivate, controlled temperature is 31 ℃, and air flow is 130m
3/ hr, cultivated 45 hours, culture medium prescription is: glucose 5%, magnesium sulfate heptahydrate 0.05%, yeast extract 0.3%, potassium primary phosphate 1.0%, urea 0.1%, ammonium sulfate 0.2%, saltpetre 0.2%, pH value are 4.0-6.0, and substratum was sterilized 30 minutes down at 121 ℃.
With 4 tons in above-mentioned seed, all insert in 100 tons the fermentor tank and carry out continuous feeding culture, 31 ℃ of control culture temperature, air flow is 130m
3/ hr, Continuous Flow adds 5% sucrose and 0.1% urea in the cultivation, cultivates 45 hours.Culture medium prescription is: glucose 5%, magnesium sulfate heptahydrate 0.05%, yeast extract 0.3%, potassium primary phosphate 1.0%, urea 0.1%, ammonium sulfate 0.2%, saltpetre 0.2%, pH value are 4.0-6.0, and substratum was sterilized 30 minutes down at 121 ℃.After the fermentation ends, fermented liquid is pumped into the high speed butterfly chip separating machine of import, and (model is that model is FEUX510, ALFA-LAVAL produces), under the rotating speed of 5000rpm, fermented liquid is concentrated, yeast-lactic after concentrating concentrates after dissolving with tap water once more, can be with ocean rhodotorula thalline washes clean.Yeast-lactic behind the thickening and washing is delivered to the storage tank cryopreservation with transferpump.Ocean rhodotorula breast after 1.5 tons of wheat brans and 1 ton concentrated mixes, (model is the PG-500 boiling-bed drying to drying bed in that fixedly low temperature is dried, pharmacy plant and instrument factory produces in Wenzhou) go up with under 45 ℃ the temperature dry 28 hours, can obtain 1.3 tons of solid ocean rhodotorulas, wheat bran content 90% (weight ratio) wherein, ocean rhodotorula content 10% (weight ratio), the activity of ocean rhodotorula is 40% in this product, cell concn reaches 9,500,000,000/gram.
The said products is bundled into 500 gram or 10 kilograms products, is put in shady and cool dry place, can effectively preserve 2 years.
Test the effect test of routine product solid ocean rhodotorula of the present invention in Penaeus vannamei is cultured.
Ocean rhodotorula is except that rich in proteins, also have astaxanthin (carotenoid a kind of) and a large amount of unsaturated fatty acidss, be used for aquaculture, can obviously improve the survival rate of output, fishes and shrimps and improve body colour, and can avoid residual in human body of the edible chemical pigment of tradition in culturing, microbiotic and the harm that brings.In order to understand the effect of product solid ocean rhodotorula of the present invention in prawn culturing, we test on the shrimp pool that North Sea group woods biotechnology company limited provides, and situation is as follows:
One, materials and methods
1, experiment pool and contrast pond: select 2 of test tanks, the pond number is 4
#, 5
#, area is respectively 8 mu, 9 mu.2 in pond of contrast, the pond number is 7
#, 8
#, being respectively 6.5 mu, 8.6 mu, shrimp pond auxiliary facility and cultivating condition are basic identical.
2, breed variety and putting in a suitable place to breed: breed variety is a Penaeus vannamei, and the shrimp seedling is from local seedling field, puts the date in a suitable place to breed and density sees Table 1
Table 1 test tank is put situation in a suitable place to breed with the contrast pond
| Pond number | Area | Put the date (month, day) in a suitable place to breed | Put quantity (ten thousand tails) in a suitable place to breed | Mu is put (ten thousand tails) | |
| The contrast pond | ????7 # | ????6.5 | March 5 calendar year 2001 | ????13 | ????2 |
| ????8 # | ????8.6 | March 5 calendar year 2001 | ????17.2 | ????2 | |
| Test tank | ????4 # | ????8 | March 5 calendar year 2001 | ????17.6 | ????2.2 |
| ????5 # | ????9 | March 5 calendar year 2001 | ????19.8 | ????2.2 | |
3, cultural method: press the 2% interpolation product solid ocean rhodotorula of the present invention of feed grain in the daily ration of test tank every day, control group does not add, and other aquaculture management measure is identical.
Two, interpretation of result
A) results situation (seeing Table 2):
Each pond results situation of table 2
| Pond number | The breed fate (my god) | Gross output (kilogram) | Per mu yield (kilogram) | Survival rate (%) | Specification (tail/kilogram) | |
| The contrast pond | ????7 # | ????98 | ????942.5 | ????145 | ????54 | ????68 |
| ????8 # | ????102 | ????1272.8 | ????148 | ????50 | ????72 | |
| Test tank | ????4 # | ????91 | ????1280 | ????160 | ????56 | ????65 |
| ????5 # | ????95 | ????1467 | ????163 | ????60 | ????62 | |
B) Economic and Efficiency Analysis: the test tank comparison is according to 15 kilograms of the average mu volume increase in pond, about 10.2%.
C) surviving rate situation analysis: as can be seen from Table 2, volume increase is mainly reflected in the surviving rate raising, illustrates that rhodotorula is strengthening the prawn vigor, has very strong effect on the surviving rate of raising prawn.
D) mature stage analysis: can find out obviously that from table 2 becoming the shrimp specification preferably under the situation, about 7 days of mature stage are shortened in test tank average specific contrast pond.
Claims (7)
1, a kind of solid ocean rhodotorula, it is characterized in that: it is the flour that is mixed by wheat bran and spissated ocean rhodotorula breast, wherein wheat bran content is 90%-96%, ocean rhodotorula content is 4%-10%, wherein the ocean rhodotorula cell concn is 50-100 hundred million/gram, and cytoactive is 20%-40%.
2, the wheat bran adsorption dry production method of a kind of solid ocean rhodotorula according to claim 1, it is characterized in that: it may further comprise the steps:
(1) going down to posterity of bacterial classification: bacterial classification adopts the inclined-plane to go down to posterity, and substratum is the wort agar substratum of 8-12Be, and culture temperature is 26 ℃-31 ℃, and incubation time is 26-72 hour, and to growing pink circular bacterium colony, colony diameter is 1-2mm;
(2) strain expanded culture: the bacterial classification of (1) step is connected in the triangular flask of the wort nutrient solution that the sterilized 8-12Be of 150ml is housed, at 26 ℃-31 ℃, carried out under the 100-250rpm condition shake-flask culture 36-48 hour, insert then in the Ka Shi jar of two wort aseptic culture fluids that 20 liters of 8-12Be respectively are housed, 26 ℃ of-31 ℃ of magnetic agitation were cultivated 36-48 hour, again two Ka Shi jar bacterial classifications are inserted in the pure culture fermentor tank that 3-5 ton substratum is housed of having sterilized, 26 ℃ of-31 ℃ of aeration-agitations were cultivated 36-48 hour, and air flow is controlled at 90-130m
3/ hr;
(3) the continuous feeding culture of fermentation deep ventilation: under aseptic condition, the seed liquor of turning out is inserted fermentor tank, 26 ℃-31 ℃ of controlled temperature, aeration-agitation was cultivated 30-48 hour, and air flow is controlled at 90-130m
3/ hr, continuing to flow simultaneously adds carbon source and nitrogenous source;
(4) separating, washing concentrates: under the separating machine of 3000-5000rpm rotating speed fermented liquid is concentrated, yeast-lactic after concentrating concentrates after dissolving with tap water once more, to with ocean rhodotorula thalline washes clean, the storage tank cryopreservation of the yeast-lactic behind the thickening and washing;
(5) drying: with wheat bran and the breast of the ocean rhodotorula after concentrating by 1: 1-2: 1 (weight ratio) mixed, and on fixedly low temperature is dried drying bed under 28 ℃-45 ℃ temperature dry 24-36 hour, gets product.
3, the wheat bran adsorption dry production method of a kind of solid ocean rhodotorula according to claim 2 is characterized in that: bacterial classification is glutinous rhodotorula, and Latin is called Rhodotorule glutinis, and preserving number is CGMCC No.2.703.
4, the wheat bran adsorption dry production method of a kind of solid ocean rhodotorula according to claim 2, it is characterized in that: carbon source is sucrose or glucose, concentration is 2%-5% (weight ratio).
5, the wheat bran adsorption dry production method of a kind of solid ocean rhodotorula according to claim 2, it is characterized in that: nitrogenous source is urea, ammonium sulfate or saltpetre, concentration is 0.1%-0.3% (weight ratio).
6, the wheat bran adsorption dry production method of a kind of solid ocean rhodotorula according to claim 2, it is characterized in that: the culture medium prescription of pure culture fermentor tank and fermentor tank is: (weight ratio)
Glucose 2-5%
Magnesium sulfate heptahydrate 0.05-0.25%
Yeast extract 0.1-0.3%
Potassium primary phosphate 0.5-1%
Urea 0.1-0.3%
Ammonium sulfate 0.05-0.2%
Saltpetre 0.05-0.2%
PH value 4.0-6.0
7, according to the wheat bran adsorption dry production method of claim 2 or 6 described a kind of solid ocean rhodotorulas, it is characterized in that: the temperature of medium sterilization is 121 ℃, and the time is 30 minutes.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433275B (en) * | 2008-12-16 | 2012-05-23 | 中国海洋大学 | Method for preparing Rhodotorula benthica fermentation feed |
| CN105166410A (en) * | 2015-09-17 | 2015-12-23 | 邵素英 | Feed additive with good thermal stability |
| CN105502679A (en) * | 2015-01-28 | 2016-04-20 | 大连玉兔岛海珍品有限公司 | Preparation method for high-activity marine yeast dry powder |
-
2002
- 2002-10-15 CN CNB021391807A patent/CN1179036C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433275B (en) * | 2008-12-16 | 2012-05-23 | 中国海洋大学 | Method for preparing Rhodotorula benthica fermentation feed |
| CN105502679A (en) * | 2015-01-28 | 2016-04-20 | 大连玉兔岛海珍品有限公司 | Preparation method for high-activity marine yeast dry powder |
| CN105502679B (en) * | 2015-01-28 | 2019-02-05 | 大连玉兔岛海洋生物科技有限公司 | The preparation method of high-activity ocean yeast dry powder |
| CN105166410A (en) * | 2015-09-17 | 2015-12-23 | 邵素英 | Feed additive with good thermal stability |
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| CN1179036C (en) | 2004-12-08 |
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