Summary of the invention
The object of the invention is to overcome the above-mentioned defective of mentioning and deficiency, and the method for a kind of applying X-ray to perch sheet sterilization fresh is provided, determined the fresh-keeping best illuminate condition of perch sheet X-radiation, thereby realize the fresh-keeping for a long time of perch sheet.
The present invention realizes that the technical scheme of its purpose employing is as follows.
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet;
B) fillet are carried out X ray and process, irradiation dose is 1.5-3.0kGy.
As preferably, step a) in, the fillet width of perch is at 3-10cm.
As preferably, step a) in, after perch is cut into fillet, processed 2 hours through salt marsh again.
As preferably, at step b) in, fillet use the composite polyethylene bag vacuum-packed after processing through X ray again.
As preferably, at step b) in, after fillet were processed through X ray, through refrigeration, the reserve temperature of described fillet was 0-6 ° again.
As preferably, at step b) in, the x-ray irradiation temperature is 0-5 °.
As preferably, described salt marsh is processed and is comprised and the fillet after cleaning are immersed salt solution half an hour of 15%, turns cylinder and immerses concentration in 20%～22% salt solution half an hour, and turning cylinder, to immerse concentration be salt solution half an hour of 25% again, goes out cylinder.
A kind of applying X-ray is to the application of method in perch sheet sterilization fresh of perch sheet sterilization fresh.
Technical scheme of the present invention has following advantage:
1.X the radiation sterilization effect is thorough.X ray has higher energy and stronger penetration power, and the packaging material that can penetrate fillet act on the deep layer of fillet, have stronger sterilizing ability.
2. original local flavor and the composition that can keep food.The X ray sterilization is a kind of " cold sterilization " technology, and irradiation temperature is at normal temperature, and the heat that irradiation produces is less, causes hardly the rising of fillet internal temperature, can keep preferably color, smell and taste and the composition of fillet.
3. noresidue, without the radioactivity of inducting, safe and sanitary.The X ray sterilization is to utilize the energy of ray to realize the fillet sterilization, therefore can not occur residual.
Produce 4.X ray is the high-velocity electrons bombardment heavy metal target of utilizing electron accelerator to produce, have accelerator controllability preferably and without the characteristics of radioactive source.
5. fillet are carried out the comprehensive preservation processing, improved the fresh-keeping time.The main cause that causes the fish corruption is the effect of microorganism and enzyme.Fish can killing microorganisms through overshoot, but autolytic enzyme and catabolic enzyme still can keep, even through also being like this behind the high-dose irradiation.In order to make nutritional quality obtain maximum maintenance and stable, irradiation processing cooperates the methods such as salt marsh or refrigeration usually.In addition, vacuum packaging also can suppress oxidation reaction.
The specific embodiment
The below is described in further detail the present invention.
Embodiment one:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 3cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and irradiation temperature is normal temperature, preservation under room temperature.
Embodiment two:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 10cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and irradiation temperature is normal temperature, preservation under room temperature.
Embodiment three:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 3cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and irradiation temperature is normal temperature, uses the composite polyethylene bag vacuum-packed, preservation under room temperature again.
Embodiment four:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 3cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and irradiation temperature is normal temperature, uses the composite polyethylene bag vacuum-packed again, and through refrigeration, the reserve temperature of described fillet is 6 ° again.
Embodiment five:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 3cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and irradiation temperature is normal temperature, uses the composite polyethylene bag vacuum-packed again, and through refrigeration, the reserve temperature of described fillet is 0 ° again.
Embodiment six:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 3cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and the x-ray irradiation temperature is 0-5 °, uses the composite polyethylene bag vacuum-packed again, and through refrigeration, the reserve temperature of described fillet is 0 ° again.
Embodiment seven:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch was processed 2 hours through salt marsh at 3cm again; Described salt marsh is processed and is comprised and the fillet after cleaning are immersed salt solution half an hour of 15%, turns cylinder and immerses concentration in 20%～22% salt solution half an hour, and turning cylinder, to immerse concentration be salt solution half an hour of 25% again, goes out cylinder;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and irradiation temperature is normal temperature, preservation under room temperature.
Embodiment eight:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 7cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and the x-ray irradiation temperature is 0-5 °, uses the composite polyethylene bag vacuum-packed again, and through refrigeration, the reserve temperature of described fillet is 0 ° again.
Embodiment nine:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 10cm;
B) fillet are carried out X ray and process, irradiation dose is 1.5kGy, and the x-ray irradiation temperature is 0-5 °, uses the composite polyethylene bag vacuum-packed again, and through refrigeration, the reserve temperature of described fillet is 0 ° again.
Embodiment ten:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 3cm;
B) fillet are carried out X ray and process, irradiation dose is 2.0kGy, and irradiation temperature is normal temperature, preservation under room temperature.
Embodiment 11:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 10cm;
B) fillet are carried out X ray and process, irradiation dose is 2.0kGy, and the x-ray irradiation temperature is 0-5 °, uses the composite polyethylene bag vacuum-packed again, and through refrigeration, the reserve temperature of described fillet is 0 ° again.
Embodiment 12:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 3cm;
B) fillet are carried out X ray and process, irradiation dose is 3.0kGy, and irradiation temperature is normal temperature, preservation under room temperature.
Embodiment 13:
A kind of applying X-ray may further comprise the steps to the method for perch sheet sterilization fresh:
A) first perch is decaptitated, remove internal organ, be cut into fillet, the fillet width of perch is at 10cm;
B) fillet are carried out X ray and process, irradiation dose is 3.0kGy, and the x-ray irradiation temperature is 0-5 °, uses the composite polyethylene bag vacuum-packed again, and through refrigeration, the reserve temperature of described fillet is 0 ° again.
The table of comparisons of VBN value when table 1 is the sterilizing rate of each embodiment and the 3rd day
| Embodiment | One | Two | Three | Four | Five | Six | Seven | Eight | Nine | Ten | 11 | 12 | 13 |
| Sterilizing rate (%) | 92.4 | 90.2 | 92.4 | 92.4 | 92.4 | 92.1 | 92.4 | 91.6 | 90.2 | 97.1 | 96.5 | 99.3 | 99.1 |
| VBN value in the time of the 3rd day (mg/100g meat) | 23 | 28 | 18 | 12 | 10 | 9 | 12 | 10 | 12 | 18 | 9 | 15 | 8 |
VBN (VBN) is one of main chemical index of judging fish freshness.VBN comprises that the flesh of fish decomposes ammonia (NH3), methylamine (MA), dimethylamine (DMA) and the trimethylamine (TMA) etc. that produce under enzyme and microbial action.In the food hygienic standard according to China's issue in 1978, the VBN value of general fish is fresh level below 15mg/100g meat; Be time fresh level at 25-35mg/100g meat.
As can be seen from Table 1, with 1.5kGy dosage irradiation, the microorganism about 90% can be killed, with 3.0 kGy dosage irradiation, the microorganism of the overwhelming majority can be substantially killed.And, with measures such as the comprehensive salt marsh of radiation treatment, vacuum packaging, low-temperature preservations, be conducive to fresh-keeping for a long time.Wherein, the penetration power of X ray is not as gamma-rays, and irradiation again after the packing will weaken the irradiation effect, so vacuum-packed under aseptic condition again behind the irradiation.