CN102827909A - Preparation method and application of small peptide chelated zinc compound - Google Patents
Preparation method and application of small peptide chelated zinc compound Download PDFInfo
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Abstract
The invention discloses a preparation method and application of a small peptide chelated zinc compound. The preparation method comprises the following steps: preparing a nutrient solution from a protein raw material, a carbon source and water and carrying out sterilization; inoculating bacillus and protease into the sterilized nutrient solution and then carrying out fermentation enzymolysis or enzymolysis fermentation so as to obtain small peptide fermentation liquor; continuing to add a water-soluble zinc salt and carrying out a chelation reaction under the conditions of a reaction temperature of 55 to 65 DEG C and a pH value of 5 to 6; and drying a reactant so as to obtain the small peptide chelated zinc compound. According to the invention, the preparation method for the small peptide chelated zinc compound has a high chelation rate, as high as more than 94%; the prepared small peptide chelated zinc compound has good stability in the stomach of an animal, contains a plurality of bioactive components and has more comprehensive nutrients, so the small peptide chelated zinc compound can be used as a feed additive to supplement trace elements for daily ration and improve immune functions of animals.
Description
Technical field
The present invention relates to a kind of preparation method and application of small-peptide chelated zinc complexes.
Background technology
Animal is in order to guarantee each cell; Tissue; Organ, the normal function of body of gland and system needs specific trace element, and trace element is the indispensable nutritive substance of animal; The trace element that adds certain high quality, high utilization rate in the daily ration is to animal health and bring into play its production potential have a very important role (NRC, 1998 to greatest extent; Richards, 2008).
Zinc is the moity of a lot of enzymes in the animal body, also is the activator of some enzyme.For example: the metabolism of zinc involved in sugar, each insulin molecule contain two zinc atoms, and the activity of the generation of zinc and Regular Insulin, secretion, storage and Regular Insulin has confidential relation; The participation red corpuscle transports in the oxygen enzyme relevant with carbonic acid gas also has zinc.Zinc and nucleic acid and proteinic growth synthetic and pair cell have confidential relation.Zinc enzyme is participated in bone growth and nutrient metabolism; Zinc is still kept the necessary element of skin normal growth.Lack the zinc influence and grow, scarce zinc can make that trichochromes is thin out, hickie occurs on the nail.
Owing to have mutual antagonistic action between the inorganic microelement, between copper, zinc, between iron, the zinc, cause absorption rate to reduce.The many excess of people are added hope and are solved the shortage problem, but not only effect is limited, has also produced the pollution (Cao, 1997) to environment.The shortage of trace element can cause the generation of many animal metabolisms even clinical disease.In Domestic Animal and the bird production process, the shortage of trace element directly causes poor growth and feed efficiency decline (NRC, 1998).Organic trace element has become the focus of domestic and international feed and breed industry research now.
The biology of organic trace element and economic worth obtain embodying at animal farming industry; Particularly on sow, milk cow, stud bird; To improve kind with the livestock and poultry breeding potential, prolong utilize the time limit (at least one tire of sow), solve hoof disease, improve healthy, promote the apparent value of take-away animal etc. and have special contribution (Cao et al., 2000; Ao Zhi just translates, and 2010; Diao Qiyu, 2010).Research shows that sow organic iron of feeding can be transferred among the embryo through placenta, can significantly improve iron level (the Wang Xue plum 2002 of fetal; Peters and Mahan, 2008).Nollet etc. (2007) are added with organic microelement in the chick daily ration, its efficiency of feed utilization significantly improves, and the excretion of trace element reduces in the ight soil, and the excretion of Mn, Zn, Fe and Cu can reduce by 54,37,27 and 45% respectively.Castillo etc. (2008) are used for piglet preweaning feed with organic zinc, have improved the utilising efficiency of feed.Andrieu (2009) summary stresses to use organic zinc, copper and selenium can reduce ruminating animal mastitis sickness rate effectively, reduces hoof disease and takes place, and improves reproductive performance.Big quantity research shows, in different animals, uses organic trace element all can improve growth, the reproductive performance of animal, improves the ability that animal is resisted disease.
At present, common organic trace element is mainly organic acid trace element and aminoacid chelating microelement on the market.Occur with ferrous fumarate since the eighties in last century, Zinc Gluconate etc. are the organic acid trace element of representative.The simple organic salt of the s-generation is though antagonistic action still can take place with the part nutritive substance in good stability.Affected factor is also more in digesting and assimilating process, and the biology utilization ratio is still lower.Metals ion makes its intramolecular charge be tending towards neutral with after amino acid molecular combines through co-ordination bond, has formed more stable chemical structure (yellow snow etc., 2008; ).But the stability problem unanimity in cud or simple stomach under the acid environment does not solve (beam is built light etc., 2008) well.
Therefore, it is high to research and develop a quasi-biology utilization ratio, and the organic trace element of the good stability in cud or simple stomach under the acid environment has crucial market significance.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of small-peptide chelated zinc complexes.
The technical scheme that the present invention adopted is:
A kind of preparation method of small-peptide chelated zinc complexes comprises the steps:
1) protein raw materials, carbon source and water are mixed with nutrient solution, sterilization;
2) sporeformer is inoculated in the nutrient solution after the sterilization, behind 30～37 ℃ of following shaking culture 18～30h, adds proteolytic enzyme, 35～50 ℃, enzymolysis 6～12h is continued in pH6.0～7.5, obtains little peptide fermented liquid; Or: in nutrient solution, add proteolytic enzyme, 35～50 ℃, pH6.0～7.5, behind enzymolysis 6～12h, the inoculation sporeformer, 30～37 ℃ are continued shaking culture 18～30h down, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid of mensuration behind the enzyme that goes out, continues to add water-soluble zinc salt, mixes, and control reaction temperature is at 55～65 ℃, and pH is 5～6, carries out chelatropic reaction;
4) reaction product is dry, obtain small-peptide chelated zinc complexes.
Said protein raw materials is at least a in dregs of beans, rice protein powder, gluten powder, Zein powder, cotton dregs, peanut meal, Rhizoma Solani tuber osi protein, the dish dregs of rice, the soybean protein concentrate.
Said carbon source is at least a in glucose, sucrose, the starch.
Above raw material all can be buied in raw materials market.
In every 100ml nutrient solution, contain protein raw materials 20～30g, carbon source 0.1～1g.
Said sporeformer be Bacillus licheniformis (
Bacillus licheniformis) or/and subtilis (
Bcillus subtilis) or/and bacillus natto (
Bacillus natto).
The inoculum density of said sporeformer is 5 * 10
7～10 * 10
7The cfu/ml nutrient solution.
Said proteolytic enzyme is neutral protease, and add-on is 400～700 U/g protein raw materials.
In the step 3), the mol ratio of little peptide and water-soluble zinc salt is 1～3:1.
Said water-soluble zinc salt is at least a in zinc sulfate, zinc chloride, zinc carbonate, the zinc acetate.
The small-peptide chelated zinc complexes that method for preparing obtains is as the application of fodder additives.
Beneficial effect of the present invention is:
The small-peptide chelated zinc preparing method's of the present invention chelation percent is high, reaches more than 94% the good stability of resulting small-peptide chelated zinc complexes in the animal stomach; Nutrition is more comprehensive; Can be used as additive agent for feeding, replenish the trace element of daily ration, improve the immunity function of animal body.
Description of drawings
Fig. 1 is the molecular weight and the appearance time graphic representation of standard protein
Fig. 2 is little peptide fermented liquid gel G-15 wash-out collection of illustrative plates.
Embodiment
Used bacterium liquid prepares by following method in following examples:
From the slant tube substratum, scrape get one the ring Bacillus licheniformis (
Bacillus licheniformis) or subtilis (
Bcillus subtilis) or bacillus natto (
Bacillus natto) bacterial classification joins in the liquid nutrient medium shake-flask culture.Shake-flask seed substratum and culture condition are glucose 1%, yeast extract paste 0.5%, peptone 0.5%, Carnis Bovis seu Bubali cream 0.5%, salt 0.05%, potassium primary phosphate 0.1%.PH=7.0-7.2,121 ℃ the sterilization 18 minutes.In 32 ℃ of constant temperature shaking tables, 200r/min shaking culture 24h obtains strain liquid.
More than three bacterial classifications available from microbial strains preservation center, Guangdong Province, Bacillus licheniformis (
Bacillus licheniformis) and subtilis (
Bcillus subtilis) numbering be respectively GIM1.8=AS1.518, GIM1.19=AS1.210.
Used neutral protease is available from Zhaodong Sun Shine Enzyme Co., Ltd. in following examples, and marque is: AS.1398, enzyme activity are 50000U/g.
Used detection method and calculation formula are as follows in following examples:
One, detects the content and the little peptide transformation efficiency of the medium and small peptide of little peptide fermented liquid
1, principle
The long polypeptide of macro-molecular protein in the little peptide fermented liquid and peptide chain precipitates with trichloroacetic acid solution, and the little peptide of short chain wherein is dissolved out with acid, comprising little peptide and part a-amino acid.Through centrifugal, filtration, digestion, distillation, measure the molten albumen of the i.e. acid of its protein contnt then.Revision forms present method with reference to soy peptide powder (Soy peptides powder) the People's Republic of China's light industry standard (QB/ T 2653-2004).
2, reagent and instrument
The 100ml beaker; 10ml, the 25ml transfer pipet; Semimicro crude protein is measured reagent and device; 15% trichloroacetic acid solution (TCA solution); 4500 rev/mins whizzer.
3, method
Take a sample: after little peptide fermented liquid is stirred, get the 10ml sample, 80 ℃ of oven dry are accurately weighed, and are used to measure little peptide content, triplicate.Concrete steps are following:
The samples with water dissolving stirs with glass stick, in the harmless immigration 100ml volumetric flask, is settled to scale (the total sample liquid of 100 ml) static 10 minutes.Shake volumetric flask and get the 15ml turbid solution and left the heart 10 minutes with whizzer 4500, get in the 10ml supernatant injecting tube pipe, add 15% Tricholroacetic Acid 10ml again, quiescent settling filtered with qualitative filter paper after 15 minutes.Get filtrating 10ml (the sample liquid that is equivalent to be used for digesting is 5ml) and inject the exsiccant alimentary canal, add copper sulfate 0.2g, sodium sulfate 3g adds vitriol oil 10ml again, and digestion method and distillating method are identical with nitrogen determination.
The calculation formula of peptide content in the sample:
V
1---sample consumes the hydrochloric acid volume
V
0---reagent blank consumes the hydrochloric acid volume
M---sample conversion weight
The sample liquid of m=sample weighing weight * be used to digest is long-pending/and total sample liquid is long-pending
=sample weighing weight * 5/100
Peptide transformation efficiency (%)
X
0---the protein content (%) (nitrogen determination mensuration) in the sample
The calculation formula of the medium and small peptide total mass of fermented liquid dry-matter:
A-little peptide total mass (g)
M
0-fermented liquid dry-matter total mass (g)
Two, the mensuration and the method for calculation of the medium and small peptide molar content of little peptide fermented liquid
At first, adopt Sephadex G-15 gel filtration chromatography method that molecular mass (Mw) distribution range of the medium and small peptide of little peptide fermented liquid is measured.
1 test conditions:
Pillar: Sephadex G-15 post (1.0 cm * 80.0 cm);
Flow velocity: 1.3 mL/min;
Elutriant: 0.1 mol/L pH, 7.0 Tris-HCl;
Temperature: 18 ℃ (YC-1 type chromatography test refrigerator);
Detect wavelength: 280 nm, analyze through the CDMC chromatographic working station.
2 production standard curves
2.1 standard specimen preparation: get each 50 mg of tyrosine (Mw=181.2 u), reduced glutathion (Mw=307.22 u), Sleep-promoting factor B (Mw=612.66 u) and bacitracin (Mw=1445 u); Be dissolved in respectively in the 5 mL tri-distilled waters, process standardized solution.
2.2 graticule is made: the Sephadex G-15 dress post that will handle well; It is steady to be eluted to baseline with elutriant; Add standardized solution 3 mL; And record maximum absorption band time of occurrence (min), see table 1, and draw out the typical curve of peak time and standard protein molecular mass logarithm (lgM).According to recording each standard substance appearance time is bacitracin 71.30 min; Sleep-promoting factor B 88.142 min; Reduced glutathion 102.39 min, tyrosine 115.2 min draw out peak time (y) and standard protein molecular mass logarithm (x; LgM) typical curve (seeing table 1 and Fig. 1) is tried to achieve regression equation y
1=-47.728x+221.57, R
2=0.9946, this equation linear relationship is good, can be according to the molecular mass of the little peptide hydrolysate of this regression equation calculation.
2.3 the little peptide molecular weight of sample is measured
The little peptide fermented liquid that following each embodiment is prepared separates (see figure 2) through Sephadex G-15 gel-filtration.As can be seen from Figure 2, enzymolysis solution has 4 tangible elution peaks, and the appearance time at the 1st peak is 61.24 min, is the post forward, and the appearance time at two peaks, the 2nd, 3 peaks is respectively 84.23,99.157 min, according to regression equation y
1The molecular mass of calculating two peaks is respectively 663.59 Da and 275.98 Da; The 4th peak appearance time is 162.345 min; Judge it is kilnitamin according to the appearance time of tyrosine with different enzymolysis time atlas analysis, linear dependence not under 280 nm UV-lights.The applying portion scoop is collected the polypeptide elution peak; Through the Kai Shiding nitrogen determination; 2nd, nitrogenous 77.84 % that account for total soluble nitrogen in 3,4 peaks explain through little peptide molecule quality behind the enzymolysis mainly to concentrate between 200～700Da, promptly mainly concentrate between 2～5 little peptides; Calculating little peptide theoretical molecular according to the amino acid theoretical molecular is 238～568 Da, and the molecular-weight average of promptly little peptide is 403Da.
Therefore, in the little peptide fermented liquid of various embodiments of the present invention gained, the calculation formula of little peptide molar content is:
Little peptide molar content=little peptide total mass (g) ÷ 403
Three, the chelation percent of small-peptide chelated zinc complexes is measured:
Principle: utilize small-peptide chelated thing to be insoluble to the principle of methyl alcohol, carry out wash-out, small-peptide chelated zinc is separated with inorganic zinc, utilize total zinc of atomic absorption spectrophotometer and inorganic zinc content again, carry out the calculating of chelation percent with methyl alcohol.Concrete steps are following:
1, the preparation of standardized solution: be made into 100ug/ml to the zinc standardized solution of 1000ug/ml.The zinc standardized solution (100 ug/ml) of measuring 0.2ml, 0.4ml, 0.6ml respectively in the volumetric flask of 100ml, constant volume, this is 0.2ug/ml, 0.4ug/ml, the standard series of 0.6ug/ml.
2, small-peptide chelated zinc and inorganic zinc separates
The extraction of total zinc: the sample that accurately takes by weighing 0.1g is placed on crucible on the hot plate and heats, up to the complete charing of sample in crucible.Forward under 550 ℃ of temperature crucible in the muffle furnace of preheating 15min ashing 3h, the cooling back is with the 2ml water logging content in the crucible of weeping.If many carbon granules are arranged, then crucible is placed on drying in the water-bath, then, reenter ashing 2h in the muffle furnace, let its cooling add 2ml water again.Add 10 ml (1+1) hydrochloric acid, heated and boiled is close to dry up to content, during heating must avoid content to spill.Behind the hydrochloric acid heating for dissolving residue with 5 ml (1+1), cooling is quantitatively transferred in the volumetric flask of 100ml.Get 0.5ml solution in the volumetric flask of 100ml, constant volume.
The extraction of inorganic zinc: accurately take by weighing sample about 0.2g in the beaker of 100ml, accurately add the methyl alcohol of 50ml, put into constant temperature oscillator (37 degrees centigrade) 10min after, filter, get filtrating 1ml, be settled to 100mL.
3, utilize total zinc of atomic absorption spectrophotometer and inorganic zinc content
Apparatus parameter setting (unit type AA2610): lamp current I=3mA; Passband AA=0.2nm; Wavelength X 213.9 nm; Burner height=7.5 mm, air flow quantity=6.4min; Acetylene gas flow=2.0L/min.
Measure: 1, earlier the mark article are detected, make typical curve.
2, sample detection: good sample detects to get dilution.
Chelation percent=(total zinc content-inorganic zinc content)/total zinc content
The preparation method 1 of little peptide complex comprises the steps:
1) preparation of nutrient solution: be 46% dregs of beans with the 100kg crude protein content; The 100kg crude protein content is 60% rice protein powder; The 100kg crude protein content is 65% soybean protein concentrate, 6kg sucrose, and the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: will be in 32 ℃ of constant temperature shaking tables, the Bacillus licheniformis strain liquid behind the 200r/min shaking culture 24h inserts in the 1000L nutrient solution after the above-mentioned sterilization, makes that cell concentration is about 5 * 10 in the nutrient solution
7Cfu/ml cultivates after 24 hours for 30 ℃, and adding hydrochloric acid or sodium hydroxide adjusting medium pH value is 7.0, adds 3kg neutral protease (500U/g protein raw materials), and 45 ℃ are continued enzymolysis 10h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.01%, about 0.16mol, transformation efficiency 37.84%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5; Press the peptide zinc mol ratio of 1:1 and add zinc sulfate, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measuring chelation percent is 95.30 %.
The preparation method 2 of little peptide complex comprises the steps:
1) preparation of nutrient solution: with the 100kg crude protein content is 46% dregs of beans, and the 100kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; 3kg sucrose; 3kg glucose, 2kg starch, the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: will be in 32 ℃ of constant temperature shaking tables, the Bacillus subtilis strain liquid behind the 200r/min shaking culture 24h inserts in the 1000L nutrient solution after the above-mentioned sterilization, makes that cell concentration is about 5 * 10 in the nutrient solution
7Cfu/ml cultivates after 24 hours for 30 ℃, and adding hydrochloric acid or sodium hydroxide adjusting medium pH value is 6.8, adds 2.4kg neutral protease (400U/g protein raw materials), and 43 ℃ are continued enzymolysis 12h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.71%, and about 0.17mol, transformation efficiency are 39.1%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃, arrive with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value
6, to press the peptide zinc mol ratio of 2.25:1 and add, huge legendary turtle is closed 3h, obtains little peptide chela zinc sulfate and closes zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measuring chelation percent is 95.35%.
The preparation method 3 of little peptide complex comprises the steps:
1) preparation of nutrient solution: be 46% dregs of beans with the 100kg crude protein content; The 100kg crude protein content is 60% rice protein powder; The 100kg crude protein content is 65% soybean protein concentrate, 8kg glucose, and the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: will be in 32 ℃ of constant temperature shaking tables, the bacillus natto behind the 200r/min shaking culture 24h (
Bacillus natto) strain liquid inserts in the 1000L nutrient solution after the above-mentioned sterilization, makes that cell concentration is about 5 * 10 in the nutrient solution
7Cfu cultivates after 24 hours for 32 ℃, and adding hydrochloric acid or sodium hydroxide adjusting medium pH value is 6.8, adds 3.6kg neutral protease (600U/g protein raw materials), and 43 ℃ are continued enzymolysis 12h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.65%, and about 0.17mol, transformation efficiency are 39.0%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6; Press the peptide zinc mol ratio of 2.25:1 and add zinc chloride, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measuring chelation percent is 95.28%
Embodiment 4
The preparation method 4 of little peptide complex comprises the steps:
1) preparation of nutrient solution: be 46% dregs of beans with the 100kg crude protein content; The 100kg crude protein content is 60% rice protein powder; The 100kg crude protein content is 65% soybean protein concentrate, 8kg starch, and the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: will be in 32 ℃ of constant temperature shaking tables; Bacillus licheniformis strain liquid behind the 200r/min shaking culture 24h and Bacillus subtilis strain liquid insert in the 1000L nutrient solution after the above-mentioned sterilization, make that the Bacillus licheniformis cell concentration is about 5 * 10 in the nutrient solution
7Cfu/ml, the subtilis cell concentration is about 5 * 10
7Cfu/ml cultivates after 24 hours for 32 ℃, and adding hydrochloric acid or sodium hydroxide adjusting medium pH value is 6.8, adds 4.2kg neutral protease (700U/g protein raw materials) then, and 40 ℃ are continued enzymolysis 12h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 20.96%, and about 0.16mol, transformation efficiency are 37. 74%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5; Press the peptide zinc mol ratio of 2.25:1 and add zinc sulfate, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.30%.
Embodiment 5
The preparation method 5 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 50kg crude protein content is 46% dregs of beans; The 25kg crude protein content is that 50% Zein powder, 15kg crude protein content are that the 35% dish dregs of rice, 20kg crude protein content are that 48% peanut meal, 65kg crude protein content are 60% rice protein powder, and the Rhizoma Solani tuber osi protein powder of 25kg crude protein content 72%, 100kg crude protein content are 65% soybean protein concentrate; 3kg sucrose; 3kg glucose, 2kg starch, the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: will be in 32 ℃ of constant temperature shaking tables, the Bacillus licheniformis strain liquid behind the 200r/min shaking culture 24h inserts in the 1000L nutrient solution after the above-mentioned sterilization, makes that cell concentration is about 5 * 10 in the nutrient solution
7Cfu/ml cultivates after 24 hours for 35 ℃, and adding hydrochloric acid or sodium hydroxide adjusting medium pH value is 7.0, adds 3kg neutral protease (500U/g protein raw materials), and 45 ℃ are continued enzymolysis 10h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 20. 75%, about 0.16mol, transformation efficiency 37.08%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 2.25:1 and add zinc carbonate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measuring chelation percent is 95.57 %.
Embodiment 6
The preparation method 6 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 40kg crude protein content is 46% dregs of beans, and the 15kg crude protein content is 50% Zein powder, and the 15kg crude protein content is the 35% dish dregs of rice; The 20kg crude protein content is 48% peanut meal, and the 95kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; The cotton dregs of 15 crude protein contents 42%, 6kg glucose, the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: will be in 32 ℃ of constant temperature shaking tables, the Bacillus subtilis strain liquid behind the 200r/min shaking culture 24h inserts in the 1000L nutrient solution after the above-mentioned sterilization, makes that cell concentration is about 5 * 10 in the nutrient solution
7～10 * 10
7Cfu/ml, adding hydrochloric acid or sodium hydroxide adjusting medium pH value are 6.8,37 ℃ cultivated after 24 hours, added 2.4kg neutral protease (400U/g protein raw materials), and 43 ℃ are continued enzymolysis 12h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 20.75%, and about 0.16mol, transformation efficiency are 39.01%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃, press the peptide zinc mol ratio of 2.25:1 and add zinc sulfate, arrive with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value
6, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measuring chelation percent is 96. 38%.
Embodiment 7
The preparation method 7 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 50kg crude protein content is 46% dregs of beans, and the 20kg crude protein content is 50% Zein powder, and the 15kg crude protein content is the 35% dish dregs of rice; The 20kg crude protein content is 48% peanut meal, and the 95kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; 8kg starch; The water constant volume, was sterilized 18 minutes for 121 ℃ with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8 to 1000L;
2) little peptide fermented liquid preparation: in 32 ℃ of constant temperature shaking tables, the bacillus natto behind the 200r/min shaking culture 24h (
Bacillus natto) strain liquid inserts in the 1000L nutrient solution after the above-mentioned sterilization, makes that cell concentration is about 5 * 10 in the nutrient solution
7～10 * 10
7Cfu/ml cultivates after 24 hours for 32 ℃, and adding hydrochloric acid or sodium hydroxide adjusting medium pH value is 6.8, adds 2.4kg neutral protease (400U/g protein raw materials), and 43 ℃ are continued enzymolysis 12h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.01%, and about 0.16mol, transformation efficiency are 37.84%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 3:1 and add zinc sulfate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.51%.
Embodiment 8
The preparation method 8 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 50kg crude protein content is 46% dregs of beans, and the 20kg crude protein content is 50% Zein powder, and the 15kg crude protein content is the 35% dish dregs of rice; The 20kg crude protein content is 48% peanut meal, and the 95kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; 3kg sucrose, 3kg glucose, 2kg starch; The water constant volume, was sterilized 18 minutes for 121 ℃ with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8 to 1000L;
2) little peptide fermented liquid preparation: will be in 32 ℃ of constant temperature shaking tables; Bacillus licheniformis strain liquid behind the 200r/min shaking culture 24h and Bacillus subtilis strain liquid insert in the 1000L nutrient solution after the above-mentioned sterilization, make that the Bacillus licheniformis cell concentration is about 5 * 10 in the nutrient solution
7Cfu/ml, the subtilis cell concentration is about 5 * 10
7Cfu/ml cultivates after 24 hours for 32 ℃, and adding hydrochloric acid or sodium hydroxide adjusting medium pH value is 6.8, adds 3.6kg neutral protease (600U/g protein raw materials) then, and 40 ℃ are continued enzymolysis 12h, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.96%, and about 0.17mol, transformation efficiency are 39.55%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 3:1 and add zinc acetate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.32%.
Embodiment 9
The preparation method 9 of little peptide complex comprises the steps:
1) preparation of nutrient solution: be 46% dregs of beans with the 100kg crude protein content; The 100kg crude protein content is 60% rice protein powder; The 100kg crude protein content is 65% soybean protein concentrate, 8kg sucrose, and the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 4.2kg neutral protease (700U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, the Bacillus licheniformis strain liquid behind the 200r/min shaking culture 24h inserts in the little peptidase hydrolyzed liquor, makes that the Bacillus licheniformis cell concentration is about 5 * 10 in the enzymolysis
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 35 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.56%, and about 0.16mol, transformation efficiency are 38.83%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 1:1 and add zinc acetate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 94.75%
Embodiment 10
The preparation method 10 of little peptide complex comprises the steps:
1) preparation of nutrient solution: be 46% dregs of beans with the 100kg crude protein content; The 100kg crude protein content is 60% rice protein powder; The 100kg crude protein content is 65% soybean protein concentrate, 6kg glucose, and the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 4.2kg neutral protease (700U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, the Bacillus subtilis strain liquid behind the 200r/min shaking culture 24h inserts in the little peptidase hydrolyzed liquor, and the subtilis cell concentration is about 5 * 10
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 32 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.32%, and about 0.16mol, transformation efficiency are 35.88%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 3:1 and add zinc sulfate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 95.33%.
Embodiment 11
The preparation method 11 of little peptide complex comprises the steps:
1) preparation of nutrient solution: with the 100kg crude protein content is 46% dregs of beans, and the 100kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; 3kg sucrose; 3kg glucose, 2kg starch, the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 3.6kg neutral protease (600U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, the bacillus natto strain liquid behind the 200r/min shaking culture 24h inserts in the little peptidase hydrolyzed liquor, makes that the bacillus natto cell concentration is about 5 * 10 in the enzymolysis
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 32 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.13%, and about 0.16mol, transformation efficiency are 38.32%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 2.25:1 and add zinc sulfate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 95.36%.
Embodiment 12
The preparation method 12 of little peptide complex comprises the steps:
1) preparation of nutrient solution: be 46% dregs of beans with the 100kg crude protein content; The 100kg crude protein content is 60% rice protein powder; The 100kg crude protein content is 65% soybean protein concentrate, 8kg sucrose, and the water constant volume is to 1000L; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8, sterilized 18 minutes for 121 ℃;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 2.4kg neutral protease (400U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, Bacillus licheniformis strain liquid and Bacillus subtilis strain liquid behind the 200r/min shaking culture 24h insert in the little peptidase hydrolyzed liquor, make that the Bacillus licheniformis cell concentration is about 5 * 10 in the enzymolysis
7Cfu/ml, the subtilis cell concentration is about 5 * 10
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 32 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 22.01%, and about 0.17mol, transformation efficiency are 39.64%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 2.25:1 and add zinc carbonate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.43%.
Embodiment 13
The preparation method 13 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 50kg crude protein content is 46% dregs of beans, and the 20kg crude protein content is 50% Zein powder, and the 15kg crude protein content is the 35% dish dregs of rice; The 20kg crude protein content is 48% peanut meal, and the 95kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; 6kg glucose; The water constant volume, was sterilized 18 minutes for 121 ℃ with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8 to 1000L;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 3.0kg neutral protease (500U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, Bacillus licheniformis strain liquid and bacillus natto strain liquid behind the 200r/min shaking culture 24h insert in the little peptidase hydrolyzed liquor, make that the Bacillus licheniformis cell concentration is about 5 * 10 in the enzymolysis
7Cfu/ml, the bacillus natto cell concentration is about 5 * 10
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 32 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 20.75%, and about 0.16mol, transformation efficiency are 37.62%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 2.25:1 and add zinc sulfate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.90%.
Embodiment 14
The preparation method 14 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 50kg crude protein content is 46% dregs of beans; The 20kg crude protein content is that 50% Zein powder, 30kg crude protein content are that the 35% dish dregs of rice, 20kg crude protein content are that 48% peanut meal, 60kg crude protein content are 60% rice protein powder; The 20kg crude protein content is 80% gluten powder, and the 100kg crude protein content is 65% soybean protein concentrate, 4kg sucrose; 4g glucose; The water constant volume, was sterilized 18 minutes for 121 ℃ with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8 to 1000L;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 4.2kg neutral protease (700U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, the Bacillus subtilis strain liquid behind the 200r/min shaking culture 24h inserts in the little peptidase hydrolyzed liquor, and the subtilis cell concentration is about 5 * 10
7～10 * 10
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 32 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 21.31%, and about 0.16mol, transformation efficiency are 38.58%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 2.25:1 and add zinc chloride; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.67%.
Embodiment 15
The preparation method 15 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 50kg crude protein content is 46% dregs of beans, and the 20kg crude protein content is 50% Zein powder, and the 15kg crude protein content is the 35% dish dregs of rice; The 20kg crude protein content is 48% peanut meal, and the 95kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; 3kg sucrose, 3kg glucose, 2kg starch; The water constant volume, was sterilized 18 minutes for 121 ℃ with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8 to 1000L;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 4.2kg neutral protease (700U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, the bacillus natto strain liquid behind the 200r/min shaking culture 24h inserts in the little peptidase hydrolyzed liquor, makes the bacillus natto cell concentration be about 5 * 10
7～10 * 10
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 36 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 20.65%, and about 0.16mol, transformation efficiency are 37.45%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 3:1 and add zinc sulfate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.57%.
Embodiment 16
The preparation method 16 of little peptide complex comprises the steps:
1) preparation of nutrient solution: the 50kg crude protein content is 46% dregs of beans, and the 20kg crude protein content is 50% Zein powder, and the 15kg crude protein content is the 35% dish dregs of rice; The 20kg crude protein content is 48% peanut meal, and the 95kg crude protein content is 60% rice protein powder, and the 100kg crude protein content is 65% soybean protein concentrate; 3kg sucrose, 3kg glucose, 2kg starch; The water constant volume, was sterilized 18 minutes for 121 ℃ with hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 6.8 to 1000L;
2) little peptide fermented liquid preparation: sterilization finishes, and after culture-liquid temp drops to 45 ℃, adds 4.2kg neutral protease (700U/g protein raw materials), and 45 ℃ of enzymolysis 12h obtain little peptidase hydrolyzed liquor; Will be in 32 ℃ of constant temperature shaking tables, the Bacillus licheniformis strain liquid behind the 200r/min shaking culture 24h inserts in the little peptidase hydrolyzed liquor, makes that the Bacillus licheniformis cell concentration is about 5 * 10 in the enzymolysis
7～10 * 10
7Cfu/ml cultivates after 24 hours, obtains little peptide fermented liquid for 33 ℃;
3) content of the medium and small peptide of the little peptide fermented liquid dry-matter of mensuration is 20.31%, and about 0.16mol, transformation efficiency are 36.83%;
4) the fermented liquid temperature is increased to 85～90 ℃, kept 20 minutes, then the fermented liquid temperature is adjusted to 60 ℃; Press the peptide zinc mol ratio of 2.25:1 and add zinc sulfate; With hydrochloric acid or sodium hydroxide adjustment reacting liquid pH value to 5, huge legendary turtle is closed 3h, obtains small-peptide chelated zinc complexes;
5) small-peptide chelated zinc complexes is placed in hot drying cylinder, 145 ℃ are carried out drying, finished product, measure the content of chelating zinc, calculating chelation percent is 96.91%.
One, small-peptide chelated zinc of the present invention is at animal stomach internal stability
Absorb mechanism from organic trace element, as long as it get into blood with amino acid or small-peptide chelated integral form through mucous membrane cytolemma, mucous membrane cell and basal cell membranes at small intestine.If therefore organic trace element dissociates under the low pH acidic conditions of simple stomach, its biological value will be had a greatly reduced quality, and this point more notes on ruminating animal, because it not only has abomasum to also have ruminant stomach.The stability of measuring organic microelement chelate can be reacted the changing conditions of inner complex its chelation percent after process gastric juice digestion process comparatively really, can actual response inner complex state and performance in vivo.
The solubleness that this kind detection method is more simple detects, and perhaps the detection of complexation strength is more accurate.Because solubleness is main relevant with aglucon, good like the solubleness of Copper lysinate, the solubleness of copper methionine is just very poor.Detect complex compound intensity (Qf value), can not reflect the biological intravital stability of organic trace element equally in complicacy.Though mainly be water surrounding in the organism, the organic cpds of various enzymes, metals ion and many complicacies is arranged in the organism, digestive tube different sites acid-base status is different, all affects organic trace element steady state in vivo.So this method combination is to be based upon under the condition of simulation organism self Physiology and biochemistry environment to form, thereby more can accurately reflect the intravital state of organic microelement chelate.
1. principle
1) principle of utilizing organic trace element to be insoluble to methyl alcohol is measured the chelation percent of trace element in the product.
2) simulation pig gastric environment and the average emptying time of pig stomach food; Carry out amino acid or small peptide chelated microelement extracorporeal simulating experiment; Through the chelation percent of amino acid that simulated experiment is handled or small peptide chelated microelement sample with handle before the ratio of chelation percent of amino acid or small peptide chelated microelement sample, be the animal stomach internal stability of sample.
2. material
Porcine pepsin 15000U, Hydrocerol A-disodium hydrogen phosphate buffer solution pH2.5 (0.1mol/L Hydrocerol A and 0.2mol/L Sodium phosphate, dibasic, the volume ratio preparation of pressing 0.40:10.60); Sodium hydroxide 0.2M, hydrochloric acid 0.2M.
3. the best stomach en-addition of method and step 3.1 confirms.
Get Hydrocerol A-sodium dihydrogen phosphate buffer 50ml of pH2.5, add 0.83,1.67,3.33,6.67,13.3,26.7 respectively, 33.3mg porcine pepsin (vigor 15000U), be mixed with the SGF of different pepsin activities; Its peptic activity of stomach is respectively 250,500, and 1000; 2000,4000,10000U/ml; Handle organic microelement chelate (Yang Lin etc., 2001 respectively; Wang Zaigui etc., 2009; Wang Limin etc., 2009).
3.2 confirming of treatment time
The average gastric emptying time according to pig is that 2h confirms the treatment time.
3.3 the SGF of specimen is handled
Accurately weighing sample 10.0g adds in the 50ml simulation pig gastric juice, and regulating the pH value is 2.5, places 39 ℃ of thermostat water baths to handle 2h, whenever stirs once at a distance from 10min minute.Dry.Get sample after the processing and carry out the mensuration of chelation percent.
3.4 the calculating of stability factor in the simulated gastric
Stability factor X=A/B in the simulated gastric
In the formula: X---the simulated animal gastric environment stability (%) of sample.
A---handle back sample chelation percent (%).
Chelation percent (%) before B---sample is handled.
Calculation result remains into 2 significant digits.
The small-peptide chelated zinc stability of sample that records embodiment 1～16 through aforesaid method is as shown in table 2:
Two, experimentation on animals
360 weanling pigs are divided into 18 groups at random and experimentize.The experiment feed adopts conventional piglet commodity material; Feed per ton adds 300g ferrous sulfate, 500g copper sulfate, 150g manganous sulfate; On this basis; Test 1 group and add 300g zinc sulfate, test 2 groups of zinc glycinates that add 300g, test 3～18 groups of small-peptide chelated zinc complexes that add the 300g embodiment of the invention 1～16 respectively.Experiment was carried out 36 days, and the result shows: compare with inorganic zinc, zinc-amino acid chelate, the of the present invention small-peptide chelated zinc complexes that in feed, adds equivalent can effectively improve day weight gain rate, the feedstuff-meat ratio of sucking pig, reduces diarrhea rate and feed consumption rate (seeing table 3).
Above embodiment is merely and introduces preferred case of the present invention, and to those skilled in the art, any conspicuous variation and the improvement in the scope that does not deviate from spirit of the present invention, carried out all should be regarded as a part of the present invention.
Claims (10)
1. the preparation method of a small-peptide chelated zinc complexes comprises the steps:
1) protein raw materials, carbon source and water are mixed with nutrient solution, sterilization;
2) sporeformer is inoculated in the nutrient solution after the sterilization, behind 30～37 ℃ of following shaking culture 18～30h, adds proteolytic enzyme, 35～50 ℃, enzymolysis 6～12h is continued in pH6.0～7.5, obtains little peptide fermented liquid; Or: in nutrient solution, add proteolytic enzyme, 35～50 ℃, pH6.0～7.5, behind enzymolysis 6～12h, the inoculation sporeformer, 30～37 ℃ are continued shaking culture 18～30h down, obtain little peptide fermented liquid;
3) content of the medium and small peptide of the little peptide fermented liquid of mensuration behind the enzyme that goes out, continues to add water-soluble zinc salt, mixes, and control reaction temperature is at 55～65 ℃, and pH is 5～6, carries out chelatropic reaction;
4) reaction product is dry, obtain small-peptide chelated zinc complexes.
2. the preparation method of small-peptide chelated zinc complexes according to claim 1 is characterized in that: said protein raw materials is at least a in dregs of beans, rice protein powder, gluten powder, Zein powder, cotton dregs, peanut meal, Rhizoma Solani tuber osi protein, the dish dregs of rice, the soybean protein concentrate.
3. the preparation method of small-peptide chelated zinc complexes according to claim 1 is characterized in that: said carbon source is at least a in glucose, sucrose, the starch.
4. the preparation method of small-peptide chelated zinc complexes according to claim 1 is characterized in that: in every 100ml nutrient solution, contain protein raw materials 20～30g, carbon source 0.1～1g.
5. the preparation method of small-peptide chelated zinc complexes according to claim 1 is characterized in that: said sporeformer be Bacillus licheniformis (
Bacillus licheniformis) or/and subtilis (
Bcillus subtilis) or/and bacillus natto (
Bacillus natto).
6. the preparation method of small-peptide chelated zinc complexes according to claim 1, it is characterized in that: the inoculum density of said sporeformer is 5 * 10
7～10 * 10
7The cfu/ml nutrient solution.
7. the preparation method of small-peptide chelated zinc complexes according to claim 1, it is characterized in that: said proteolytic enzyme is neutral protease, add-on is 400～700 U/g protein raw materials.
8. the preparation method of small-peptide chelated zinc complexes according to claim 1, it is characterized in that: in the step 3), the mol ratio of little peptide and water-soluble zinc salt is 1～3:1.
9. the preparation method of small-peptide chelated zinc complexes according to claim 1 is characterized in that: said water-soluble zinc salt is at least a in zinc sulfate, zinc chloride, zinc carbonate, the zinc acetate.
10. the small-peptide chelated zinc complexes for preparing of each method of claim 1～9 is as the application of fodder additives.
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Address after: 510730 International Business Incubator of Science City, Guangdong, Guangzhou D-503 Applicant after: Guangzhou Bo biological Polytron Technologies Inc Address before: 510730 International Business Incubator of Science City, Guangdong, Guangzhou D-503 Applicant before: Guangzhou City Prosyn Microbial Feed Co., Ltd. |
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Application publication date: 20121219 |