CN107505436A - A kind of method and its application for controlling water activity - Google Patents
A kind of method and its application for controlling water activity Download PDFInfo
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Abstract
The present invention relates to a kind of method and its application for controlling water activity, the water activity that methods described is kept according to needed for material, from saturated salt solution, material and saturated salt solution are placed in same confined space, keep the water activity of material.Present invention can apply to the growth or metabolism of the growth of water activity regulating and controlling microbial or metabolism, especially food source microorganism.The present invention it is simple to operate, can high accurancy and precision control water activity.In the operation of reality, saturated salt solution is targetedly selected according to the water activity of material, the system research for carrying out the growth of water activity regulating and controlling microbial or metabolism on different substrates is effectively realized, is supported to realize by controlling water activity to block microbial growth and metabolism to provide theory and technology.
Description
Technical field
The present invention relates to a kind of method and its application for controlling water activity.
Background technology
Water activity (water activity, Aw) refers to when in closed container cereal or food reach poised state
Moisture vapor presses the ratio with the saturated vapor pressure of pure water at this temperature.Water activity is the reaction reliable heating power of food stability
Concept index is learned, has good correlation with the speed of many degradation reactions in food.The control of water activity simultaneously is to prevent
Harmful microorganism grows and the key link of other ill-effects.
, can be by determining relative air humidity when aqueous water and the vaporous water of material reach balance in certain environment
(relative humidity, RH) represents water activity.Therefore microorganism in food life how is regulated and controled in research water activity
Length, produce in the metabolic processes such as poison, the method for being mainly utilized in heat and moisture preserving in constant temperature and humidity incubator.But due to constant temperature and humidity
Incubator control humidity ability is limited, and the precision of general instrument is ± 0.05.In practical measurement process often relative humidity with setting
Determine humidity and larger deviation be present.In addition, during using constant temperature and humidity incubator, the action for shutdown of opening the door is to relatively wet
Degree influences also very big, it is difficult to meets for the high experiment demand of water activity required precision, it would be highly desirable to develops and new is applied to carry out
The method how water activity influences the metabolic activity research such as materials quality and regulating and controlling microbial growth, production poison.
The content of the invention
Based on above-mentioned background technology, it is an object of the invention to provide one kind under the conditions of 25 DEG C, moisture can be precisely controlled
The method of activity.The water activity that methods described can be kept according to needed for material, from saturated salt solution, by material and saturated salt
Solution is placed in same confined space；
The water activity value controlled is respectively：0.064、0.113、0.328、0.432 0.529、0.576、0.649、
0.709th, 0.743,0.753,0.809,0.810,0.843,0.851,0.902,0.936 and 0.973.
One or more of the targeted material of the present invention in cereal, food, feed, fiber.
The saturated salt solution is included such as Types Below, and the retainable water activity of the saturated salt solution：By material
It is placed in saturated salt solution in same confined space；
Lithium bromide saturated solution keep water activity be：0.064；
Lithium chloride saturated solution keep water activity be：0.113；
Magnesium chloride saturated solution keep water activity be：0.328；
Saturated solution of potassium carbonate keep water activity be：0.432；
Magnesium nitrate saturated solution keep water activity be：0.529；
Sodium bromide saturated solution keep water activity be：0.576；
Cobalt chloride saturated solution keep water activity be：0.649；
Strontium chloride saturated solution keep water activity be：0.709；
Sodium nitrate saturated solution keep water activity be：0.743；
Sodium chloride saturated solution keep water activity be：0.753；
KBr saturated solution keep water activity be：0.809；
Ammonium sulfate saturated solution keep water activity be：0.810；
Saturated potassium chloride solution keep water activity be：0.843；
Strontium nitrate saturated solution keep water activity be：0.851；
Barium chloride saturated solution keep water activity be：0.902；
Potassium nitrate saturated solution keep water activity be：0.936；
Potassium sulfate saturated solution keep water activity be：0.973.
The saturated salt solution is prepared by the following method：In water, addition places 6~8 more than the solute of solubility
My god.
Each saturated salt solution specific method is as follows：
Lithium bromide saturated solution：It is made up of solvent and solute；Solute is lithium bromide (LiBr2H2O), solvent is water；Often
Addition is no less than 500g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Lithium chloride saturated solution：It is made up of solvent and solute；Solute is lithium chloride (LiClH2O), solvent is water；Often
Addition is no less than 220g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Magnesium chloride saturated solution：It is made up of solvent and solute；Solute is magnesium chloride (MgCl2·6H2O), solvent is water；Often
Addition is no less than 150g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Saturated solution of potassium carbonate：It is made up of solvent and solute；Solute is potassium carbonate (K2CO3), solvent is water；Per 200mL water
Middle addition is no less than 300g, stores in brown reagent bottle, and room temperature uses after one week.
Magnesium nitrate saturated solution：It is made up of solvent and solute；Solute is magnesium nitrate (Mg (NO3)2·6H2O), solvent is water；
Addition is no less than 200g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
Sodium bromide saturated solution：It is made up of solvent and solute；Solute is sodium bromide (NaBr2H2O), solvent is water；Often
Addition is no less than 260g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Cobalt chloride saturated solution：It is made up of solvent and solute；Solute is cobalt chloride (CoCl2·6H2O), solvent is water；Often
Addition is no less than 160g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Strontium chloride saturated solution：It is made up of solvent and solute；Solute is strontium chloride (SrCl2·6H2O), solvent is water；Often
Addition is no less than 200g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Sodium nitrate saturated solution：It is made up of solvent and solute；Solute is sodium nitrate (NaNO3), solvent is water；Per 200mL
Addition is no less than 260g in water, stores in brown reagent bottle, and room temperature uses after one week.
Sodium chloride saturated solution：It is made up of solvent and solute；Solute is sodium chloride (NaCl), and solvent is water；Per 200mL water
Middle addition is no less than 100g, stores in brown reagent bottle, and room temperature uses after one week.
KBr saturated solution：It is made up of solvent and solute；Solute is KBr (KBr), and solvent is water；Per 200mL water
Middle addition is no less than 200g, stores in brown reagent bottle, and room temperature uses after one week.
Ammonium sulfate saturated solution：It is made up of solvent and solute；Solute is ammonium sulfate ((NH4SO4)2·6H2O), solvent is
Water；Addition is no less than 210g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
Saturated potassium chloride solution：It is made up of solvent and solute；Solute is potassium chloride (KCl), and solvent is water；Per 200mL water
The middle amount for adding potassium chloride is no less than 100g, stores in brown reagent bottle, room temperature uses after one week.
Strontium nitrate saturated solution：It is made up of solvent and solute；Solute is strontium nitrate (Sr (NO3)2), solvent is water；Often
Addition is no less than 240g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Barium chloride saturated solution：It is made up of solvent and solute；Solute is barium chloride (BaCl2·2H2O), solvent is water；Often
Addition is no less than 100g in 200mL water, stores in brown reagent bottle, and room temperature uses after one week.
Potassium nitrate saturated solution：It is made up of solvent and solute；Solute is potassium nitrate (KNO3), solvent is water；Per 200mL water
Middle addition is no less than 120g, stores in brown reagent bottle, and room temperature uses after one week.
Potassium sulfate saturated solution：It is made up of solvent and solute；Solute is potassium nitrate (K2SO4), solvent is water；Per 200mL water
Middle addition is no less than 35g, stores in brown reagent bottle, and room temperature uses after one week.
Wherein, the volume of the saturated salt solution added in the confined space is no less than the 10% of confined space.
For the application in experimentation, used confined space is drier, but is not limited to drier.
Present invention further propose that after powder is made in the material, n different waters of addition, under the conditions of 3~5 DEG C, put
Put confined space 12~24 hours, determine the water activity and moisture of material, establish the material moisture activity-moisture
Content curve；Reach the amount of water of target water activity according to needed for curve calculates the material.
The n is not less than 6.
Specifically, material samples are ground with Universalpulverizer.It is individual different amounts of that n is added in sample after grinding
Water, place in confined space, make its balance, 4 DEG C are placed 12 hours, using Aqualab 4TE (Decagon Devices, U.S.
State) measure balance after material water activity, using Moisture Analyzer MJ33 (Mettler Toledo, Switzerland)
The moisture of material after measure balance, using moisture as ordinate, water activity is abscissa, establishes the material
Water activity-moisture curve；According to curve calculate the material in an experiment the required target water that reaches live add it is sterile
The amount of water.After adding water, material is used for subsequent experimental in 4 DEG C of balances after overnight.
The priority scheme of the present invention is, under the conditions of 25 DEG C, first by cereal or food by adding water or drying to reach target
Water is lived, for the water activity kept needed for cereal or food, from saturated salt solution, by cereal or food and saturated salt solution
It is placed in same confined space；The volume of the saturated salt solution added in the confined space is：No less than confined space
10%.
The saturated salt solution is included such as Types Below, and the retainable water activity of the saturated salt solution：
Lithium bromide saturated solution keep water activity be：0.064；
Lithium chloride saturated solution keep water activity be：0.113；
Magnesium chloride saturated solution keep water activity be：0.328；
Saturated solution of potassium carbonate keep water activity be：0.432；
Magnesium nitrate saturated solution keep water activity be：0.529；
Sodium bromide saturated solution keep water activity be：0.576；
Cobalt chloride saturated solution keep water activity be：0.649；
Strontium chloride saturated solution keep water activity be：0.709；
Sodium nitrate saturated solution keep water activity be：0.743；
Sodium chloride saturated solution keep water activity be：0.753；
KBr saturated solution keep water activity be：0.809；
Ammonium sulfate saturated solution keep water activity be：0.810；
Saturated potassium chloride solution keep water activity be：0.843；
Strontium nitrate saturated solution keep water activity be：0.851；
Barium chloride saturated solution keep water activity be：0.902；
Potassium nitrate saturated solution keep water activity be：0.936；
Potassium sulfate saturated solution keep water activity be：0.973.
A further object of the present invention is, the growth of the method for above-mentioned control water activity in water activity regulating and controlling microbial
Or the application in metabolism research；Preferably, the application in the growth or metabolism research of water activity regulation and control food source microorganism.
The controllable microbial growth and metabolism of water activity, it is strict to control water activity effectively harmful microorganism be blocked to give birth to
The metabolic activities such as long and production poison.The present invention it is simple to operate, can high accurancy and precision control water activity.In the operation of reality, have
Saturated salt solution is targetedly selected according to the water activity of food, effectively realizes and carries out water activity regulation and control on different substrates
Microorganism grows or the system research of metabolism, to realize by controlling water activity to block microbial growth and metabolism to provide theory
And technical support.
Brief description of the drawings
Fig. 1 is simple constant-moisture device figure.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1 prepares required saturated salt solution according to experiment demand
For this method under the conditions of 25 DEG C, the water activity value that can be precisely controlled is respectively 0.064,0.113,0.328,0.432
0.529th, 0.576,0.649,0.709,0.743,0.753,0.809,0.810,0.843,0.851,0.902,0.936 and
0.973.According to experiment needs, reference table 1, required saturated salt solution is prepared.
Caused water activity value of the saturated salt solution of table 1 at 25 DEG C
| Numbering | Supersaturated salt solution species | Aw(25℃) |
| 1 | Lithium bromide saturated solution | 0.064 |
| 2 | Lithium chloride saturated solution | 0.113 |
| 3 | Magnesium chloride saturated solution | 0.328 |
| 4 | Saturated solution of potassium carbonate | 0.432 |
| 5 | Magnesium nitrate saturated solution | 0.529 |
| 6 | Sodium bromide saturated solution | 0.576 |
| 7 | Cobalt chloride saturated solution | 0.649 |
| 8 | Strontium chloride saturated solution | 0.709 |
| 9 | Sodium nitrate saturated solution | 0.743 |
| 10 | Sodium chloride saturated solution | 0.753 |
| 11 | KBr saturated solution | 0.809 |
| 12 | Ammonium sulfate saturated solution | 0.810 |
| 13 | Saturated potassium chloride solution | 0.843 |
| 14 | Strontium nitrate saturated solution | 0.851 |
| 15 | Barium chloride saturated solution | 0.902 |
| 16 | Potassium nitrate saturated solution | 0.936 |
| 17 | Potassium sulfate saturated solution | 0.973 |
Water activity value refers to《The measure of GB 5009.238-2016 national food safety standard food water activity》
1st, lithium bromide saturated solution is prepared, the water activity of holding is：0.064；Solute is lithium bromide (LiBr2H2O),
Solvent is water；Addition is no less than 500g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
2nd, lithium chloride saturated solution is prepared, the water activity of holding is：0.113；Solute is lithium chloride (LiClH2O),
Solvent is water；Addition is no less than 220g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
3rd, magnesium chloride saturated solution is prepared, the water activity of holding is：0.328；Solute is magnesium chloride (MgCl2·6H2O),
Solvent is water；Addition is no less than 150g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
4th, saturated solution of potassium carbonate is prepared, the water activity of holding is：0.432；Solute is potassium carbonate (K2CO3), solvent is
Water；Addition is no less than 300g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
5th, magnesium nitrate saturated solution is prepared, the water activity of holding is：0.529；Solute is magnesium nitrate (Mg (NO3)2·
6H2O), solvent is water；Addition is no less than 200g in per 200mL water, stores in brown reagent bottle, room temperature makes after one week
With.
6th, sodium bromide saturated solution is prepared, the water activity of holding is：0.576；Solute is sodium bromide (NaBr2H2O),
Solvent is water；Addition is no less than 260g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
7th, cobalt chloride saturated solution is prepared, the water activity of holding is：0.649；Solute is cobalt chloride (CoCl2·6H2O),
Solvent is water；Addition is no less than 160g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
8th, strontium chloride saturated solution is prepared, the water activity of holding is：0.709；Solute is strontium chloride (SrCl2·6H2O),
Solvent is water；Addition is no less than 200g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
9th, sodium nitrate saturated solution is prepared, the water activity of holding is：0.743；Solute is sodium nitrate (NaNO3), solvent
For water；Addition is no less than 260g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
10th, sodium chloride saturated solution is prepared, the water activity of holding is：0.753；Solute is sodium chloride (NaCl), solvent
For water；Addition is no less than 100g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
11st, KBr saturated solution is prepared, the water activity of holding is：0.809；Solute is KBr (KBr), and solvent is
Water；Addition is no less than 200g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
12nd, ammonium sulfate saturated solution is prepared, the water activity of holding is：0.810；Solute is ammonium sulfate ((NH4SO4)2·
6H2O), solvent is water；Addition is no less than 210g in per 200mL water, stores in brown reagent bottle, room temperature makes after one week
With.
13rd, saturated potassium chloride solution is prepared, the water activity of holding is：0.843；Solute is potassium chloride (KCl), and solvent is
Water；The amount that potassium chloride is added in per 200mL water is no less than 100g, stores in brown reagent bottle, room temperature uses after one week.
14th, strontium nitrate saturated solution is prepared, the water activity of holding is：0.851；Solute is strontium nitrate (Sr (NO3)2), it is molten
Agent is water；Addition is no less than 240g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
15th, barium chloride saturated solution is prepared, the water activity of holding is：0.902；Solute is barium chloride (BaCl2·
2H2O), solvent is water；Addition is no less than 100g in per 200mL water, stores in brown reagent bottle, room temperature makes after one week
With.
16th, potassium nitrate saturated solution is prepared, the water activity of holding is：0.936；Solute is potassium nitrate (KNO3), solvent
For water；Addition is no less than 120g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
17th, it is with potassium sulfate making saturated solution, the water activity of holding：0.973；Solute is potassium nitrate (K2SO4), solvent
For water；Addition is no less than 35g in per 200mL water, stores in brown reagent bottle, room temperature uses after one week.
The adjustment of the sample water activity of embodiment 2
Sample water activity need to be adjusted to target water activity.Used concrete operations are as follows：
Sample is ground using Universalpulverizer, n different amounts of water are then added in sample after grinding, wherein
N quantity is 6~10.Under the conditions of 4 DEG C, overnight, using Aqualab 4TE, (Decagon Devices, the U.S. are smart for balance
Spend for ± 0.005) the sample water activity after balance is determined, using Moisture Analyzer MJ33 (Mettler
Toledo, Switzerland) measure balance after sample moisture, using moisture as ordinate, water activity is abscissa, is built
Vertical water activity-moisture curve.Calculating sample experiments target water according to curve and live needs the sterile water that adds, and 4 DEG C flat
Weighing apparatus is used for subsequent experimental after overnight.
The water activity control accuracy of embodiment 3 monitors
Two target water activities 0.843 and 0.936 are randomly selected, carry out accuracy monitoring.
When target water activity is 0.843, saturated potassium chloride solution is added in drier bottom, the potassium chloride of addition is satisfied
It is advisable with amount of solution with 10% no less than drier volume and no more than drier dividing plate.100g water activities are adjusted to
0.843 corn, it is divided into four parts and is positioned on dividing plate is dried (as shown in Figure 1).Covered along suitable for reading move in parallel of drier
The dryer door of vaseline is scribbled, is positioned in 25 DEG C of constant incubators.Three repetitions are set.
When target water activity is 0.936, potassium nitrate saturated solution is added in drier bottom, the potassium nitrate of addition is satisfied
It is advisable with amount of solution with 10% no less than drier volume and no more than drier dividing plate.100g water activities are adjusted to
0.936 corn, it is divided into four parts and is positioned on dividing plate is dried (as shown in Figure 1).Covered along suitable for reading move in parallel of drier
The dryer door of vaseline is scribbled, is positioned in 25 DEG C of constant incubators.Three repetitions are set.
Respectively 25g corn samples are taken after placing 2 days, 4 days and 6 days.The sample of taking-up is ground with Universalpulverizer immediately
Crush, water activity is determined using Aqualab 4TE (Decagon Devices, the U.S., precision 0.005).
The water activity Monitoring Data of table 2
As a result as shown in table 2, from result, this method can be precisely controlled water work.
Although above the present invention is made to retouch in detail with general explanation, embodiment and experiment
State, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, are belonged to claimed
Scope.
Claims (10)
- A kind of 1. method for controlling water activity, it is characterised in that the water activity kept according to needed for material, from saturated salt Solution, material and saturated salt solution are placed in same confined space；The saturated salt solution type and the target water to be kept Divide activity as follows：Lithium bromide saturated solution, the water activity of holding are：0.064；Lithium chloride saturated solution, the water activity of holding are：0.113；Magnesium chloride saturated solution, the water activity of holding are：0.328；Saturated solution of potassium carbonate, the water activity of holding are：0.432；Magnesium nitrate saturated solution, the water activity of holding are：0.529；Sodium bromide saturated solution, the water activity of holding are：0.576；Cobalt chloride saturated solution, the water activity of holding are：0.649；Strontium chloride saturated solution, the water activity of holding are：0.709；Sodium nitrate saturated solution, the water activity of holding are：0.743；Sodium chloride saturated solution, the water activity of holding are：0.753；KBr saturated solution, the water activity of holding are：0.809；Ammonium sulfate saturated solution, the water activity of holding are：0.810；Saturated potassium chloride solution, the water activity of holding are：0.843；Strontium nitrate saturated solution, the water activity of holding are：0.851；Barium chloride saturated solution, the water activity of holding are：0.902；Potassium nitrate saturated solution, the water activity of holding are：0.936；Potassium sulfate saturated solution, the water activity of holding are：0.973.
- 2. according to the method for claim 1, it is characterised in that the material is in cereal, food, feed, fiber It is one or more.
- 3. according to the method for claim 1, it is characterised in that the saturated salt solution is prepared by the following method：In water In, addition is placed 6~8 days more than the solute of solubility.
- 4. according to the method for claim 3, it is characterised in that the addition of the solute of the saturated salt solution is specially：The preparation of the lithium bromide saturated solution：The lithium bromide no less than 500g is added in per 200mL water；The preparation of the lithium chloride saturated solution：The lithium chloride no less than 220g is added in per 200mL water；The preparation of the magnesium chloride saturated solution：The magnesium chloride no less than 150g is added in per 200mL water；The preparation of the saturated solution of potassium carbonate：The potassium carbonate no less than 300g is added in per 200mL water；The preparation of the magnesium nitrate saturated solution：The magnesium nitrate no less than 200g is added in per 200mL water；The preparation of the sodium bromide saturated solution：The sodium bromide no less than 260g is added in per 200mL water；The preparation of the cobalt chloride saturated solution：The cobalt chloride no less than 160g is added in per 200mL water；The preparation of the strontium chloride saturated solution：The strontium chloride no less than 200g is added in per 200mL water；The preparation of the sodium nitrate saturated solution：The sodium nitrate no less than 260g is added in per 200mL water；The preparation of the sodium chloride saturated solution：The sodium chloride no less than 100g is added in per 200mL water；The preparation of the KBr saturated solution：The KBr no less than 200g is added in per 200mL water；The preparation of the ammonium sulfate saturated solution：The ammonium sulfate no less than 210g is added in per 200mL water；The preparation of the saturated potassium chloride solution：The potassium chloride no less than 100g is added in per 200mL water；The preparation of the strontium nitrate saturated solution：The strontium nitrate no less than 240g is added in per 200mL water；The preparation of the barium chloride saturated solution：The barium chloride no less than 100g is added in per 200mL water；The preparation of the potassium nitrate saturated solution：The potassium nitrate no less than 120g is added in per 200mL water；The preparation of the potassium sulfate saturated solution：Addition is no less than 35g potassium sulfate in per 200mL water.
- 5. according to the method for claim 1, it is characterised in that the body of the saturated salt solution added in the confined space 10% of product no less than confined space volume.
- 6. according to any described methods of claim 1-5, it is characterised in that methods described is carried out under the conditions of 24~26 DEG C, Preferably 25 DEG C.
- 7. according to any described methods of claim 1-6, it is characterised in that after powder is made in the material, add n difference Water, under the conditions of 3~5 DEG C, place confined space 12~24 hours, determine the water activity and moisture of material, establish Material moisture activity-moisture the curve；Reach adding for target water activity according to needed for curve calculates the material Water.
- 8. according to the method for claim 7, it is characterised in that the n is not less than 6.
- 9. according to the method for claim 1, it is characterised in that under the conditions of 25 DEG C, first by cereal or food by adding water Or drying reaches target water activity, for the water activity kept needed for cereal or food, from saturated salt solution, by cereal Or food is placed in same confined space with saturated salt solution；The volume of the saturated salt solution added in the confined space For：No less than the 10% of confined space volume.The saturated salt solution is included such as Types Below, and the retainable water activity of the saturated salt solution：Lithium bromide saturated solution keep water activity be：0.064；Lithium chloride saturated solution keep water activity be：0.113；Magnesium chloride saturated solution keep water activity be：0.328；Saturated solution of potassium carbonate keep water activity be：0.432；Magnesium nitrate saturated solution keep water activity be：0.529；Sodium bromide saturated solution keep water activity be：0.576；Cobalt chloride saturated solution keep water activity be：0.649；Strontium chloride saturated solution keep water activity be：0.709；Sodium nitrate saturated solution keep water activity be：0.743；Sodium chloride saturated solution keep water activity be：0.753；KBr saturated solution keep water activity be：0.809；Ammonium sulfate saturated solution keep water activity be：0.810；Saturated potassium chloride solution keep water activity be：0.843；Strontium nitrate saturated solution keep water activity be：0.851；Barium chloride saturated solution keep water activity be：0.902；Potassium nitrate saturated solution keep water activity be：0.936；Potassium sulfate saturated solution keep water activity be：0.973.
- 10. the method for any control water activities of claim 1-9 is in the growth or metabolism of water activity regulating and controlling microbial Application in research；Preferably, the application in the growth or metabolism research of water activity regulation and control food source microorganism.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152127A (en) * | 1995-12-14 | 1997-06-18 | 达式奎 | Water activity detecting method and instrument |
| CN103349077A (en) * | 2013-07-01 | 2013-10-16 | 南昌大学 | Preparation method of high anti-oxidant milk powder addictive |
| CN103710400A (en) * | 2013-12-27 | 2014-04-09 | 南昌大学 | Method for preparing triglyceride containing rich conjugated linoleic acids at sn-2 site |
| CN105219811A (en) * | 2015-08-25 | 2016-01-06 | 江苏科技大学 | In a kind of microwave, enzymatic mixed fatty acid synthesizes human milk fat substituted product and preparation method thereof |
| CN106418462A (en) * | 2016-09-13 | 2017-02-22 | 江南大学 | Method for boosting starch carbon free radical by reducing microwave |
-
2017
- 2017-07-07 CN CN201710552263.7A patent/CN107505436A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152127A (en) * | 1995-12-14 | 1997-06-18 | 达式奎 | Water activity detecting method and instrument |
| CN103349077A (en) * | 2013-07-01 | 2013-10-16 | 南昌大学 | Preparation method of high anti-oxidant milk powder addictive |
| CN103710400A (en) * | 2013-12-27 | 2014-04-09 | 南昌大学 | Method for preparing triglyceride containing rich conjugated linoleic acids at sn-2 site |
| CN105219811A (en) * | 2015-08-25 | 2016-01-06 | 江苏科技大学 | In a kind of microwave, enzymatic mixed fatty acid synthesizes human milk fat substituted product and preparation method thereof |
| CN106418462A (en) * | 2016-09-13 | 2017-02-22 | 江南大学 | Method for boosting starch carbon free radical by reducing microwave |
Non-Patent Citations (2)
| Title |
|---|
| 严维凌，赵俊虹: "食品水分活度测量不确定度的评定方法", 《食品与机械》 * |
| 孔宪敏等: "谷物水活度的康卫氏皿测定方法分析", 《食品科技》 * |
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