1357results about How to "Prevent browning" patented technology

The invention discloses lactobacillus used for biological preservation, which is named Lactobacillus plantarum and has been collected in China Center for Type Culture Collection on June 21, 2010 with the collection number of CCTCC M 2010150. The lactobacillus can be used for fruit preservation. The application method comprises the following steps: heating and dissolving an acidizer in water, reducing temperature to normal temperature, adding lactobacillus powder, uniformly mixing, spraying onto fruits in an atomized mode, and storing the fruits at normal temperature or low temperature. Under the condition of normal temperature, the fruits can be preserved for 3 months, and under the condition of low temperature, the fruits can be preserved for 6 months. The Lactobacillus plantarum is obtained by screening a large amount of lactobacillus, can control peel browning and reduce fruit morbidity, and also can properly reduce fruit moisture violation, inhibit the metabolism of the fruits, and prolong the refreshing time.

The invention discloses an application of alpha-aminoisobutyric acid or beta-aminoisobutyric acid in preparation of a fruit preservative as well as the fruit preservative and a using method. Experiments demonstrate that after the fruit is processed by alpha-aminoisobutyric acid or beta-aminoisobutyric acid, the rotting rate of fruit can be effectively reduced, the fruit quality can be maintained,and the preserving time can be prolonged. Thus, the alpha-aminoisobutyric acid or beta-aminoisobutyric acid can be used for preparing the fruit preservative which contains 1-100 mM of alpha-aminoisobutyric acid or beta-aminoisobutyric acid. By processing the fruit such as litchi, longan, yangtao, papaya and mango by use of the fruit preservative and according to the processing method disclosed bythe invention, the rotting rate of fruit can be effectively reduced, the fruit quality can be maintained, the commodity rate of fruit can be improved, and the preserving time can be prolonged. The fruit preservative disclosed by the invention is safe and environmentally-friendly, and the preserving method is simple and convenient.

The invention discloses a method for the tissue culture of Lycoris haywardii and a rapid propagation technique. The method comprises the following: 1) a step of preparing culture mediums, and components of a basic culture medium and the culture mediums in every stage of tissue culture, as well as the weight of every component contained in each liter are as follows: the basic culture medium comprises MS or 1/2MS, wherein the basic culture medium comprises 20 to 40 g/L of sucrose and 8 g/L of agar and has the pH of 5.8; an induction culture medium comprises MS, 0.2 to 1.0 mg/L of TD and 2 g/L of activated carbon; a proliferation culture medium comprises MS, 3 to 7 mg/L of 6-BA and 0.5 to 2.5 mg/L of NAA; a strong seedling culture medium comprises MS, 0.5 to 2.5 mg/L of 6-BA and 0.5 to 1.5 mg/L of NAA; and a rooting culture medium comprises 1/2MS, 0.5 to 2.5 mg/L of KT, 0.5 to 2.5 mg/L IBA and 2 g/L of activated carbon; 2) a step of selecting and sterilizing explants; 3) a step of carrying out induction culture, proliferation culture, strong seedling culture and rooting culture; and 4) a step of domesticating and transplanting tissue culture seedlings. The method has the advantages that the induction rate of Lycoris haywardii buds reaches over 90 percent; the proliferation rate of each week is over 500 percent; the growth rate of the Lycoris haywardii buds is accelerated; the browning phenomenon of the explants is effectively prevented; and the rooting of the tissue culture seedlings is promoted at the same time when bulblet browning is prevented.

The invention discloses boiled lotus root slice processing technology and a product thereof, and belongs to the technical field of food processing. The technology is characterized by comprising the following steps of: soaking a lotus root in solution consisting of citric acid and kojic acid for 0.5 to 2 hours after washing, selecting and peeling; pickling the lotus root in the solution of salt at 18 to 22 degree Be' for 5 to 10 days; cutting and desalting the lotus root after pickling; boiling the cut lotus root in 0.3 to 0.5 mass percent of calcium lactate solution at the temperature of between 80 and 85 DEG C for 12 to 15 minutes; sorting, packaging and adding decoction which is formed by mixing the citric acid, malic acid, lactic acid, and ascorbic acid and contains 0.3 to 0.5 mass percent of the calcium lactate; and obtaining the product by vacuumizing, sealing, sterilizing and cooling. Boiled lotus root slices prepared by the technology have the characteristics of milky color and luster, tender and crisp texture, safety and sanitation, and convenient eating.

The present invention belongs to the field of fruit and vegetable processing technology, and aims at solving the browning problem during producing freeze stored sweet potato chip. The freeze stored sweet potato chip producing process includes the following main steps: 1) sorting sweet potato material, washing and slicing into 4 mm thick chips; 2) scalding the chip at 100 deg.c for 15 sec; and freezing; 3) soaking the frozen chip at 25 deg.c for 30 mm to protect color; 4) amending the chip through vacuum penetration at vacuum of 0.08-0.10 MPa for 30 min, freezing to -18 deg.c fast and packing; and 5) cold storing at low temperature from -28 deg.c to -18 deg.c. Thus produced sweet potato chip has good color, no browning, long storing period and other features.

The invention discloses a processing method of canned tunas. Compared with the generally processed canned tunas, the invention has the advantages that cheap tunas such as frigate mackerels and the like are used as raw materials, and aiming at the inherent defects of sour taste, dark color, easy browning and the like of frigate mackerel tunas, the invention provides two solutions correspondingly in the processing method, wherein one solution is color protection treatment, namely a brine soaking method is used for removing partial blood water and soluble protein in tuna bodies by adding citric acid and vitamin C into brine to perform the function of color protection; and the other solution is to add the soup of the invention into the canned tuna meat after the raw materials are processed and cooked to perform the functions of preventing the tuna meat from being oxidized, preventing the tuna meat from browning and improving the taste of the tuna meat, wherein the soup comprises salt, monosodium glutamate, sodium pyrophosphate, sodium tripolyphosphate, citric acid and vitamin C. The invention overcomes the inherent defects of cheap tunas, can be used for processing the cheap tunas used as can raw materials into the canned tunas, and improves the economic benefit and the development prospect of the products.

The invention discloses a shrimp preservative which comprises the following basic components: 0.5-50g/L of pulullan polysaccharide, 0-1g/L of natamycin, 0-5g/L of nisin from streptococcus lactis, 0-20g/L of ascorbic acid, 0-10g/L of polyglutamic acid, 0-20g/L of other antioxidants, 0-30g/L of other antibacterial components, 0-20g/L of other gum components and water as a solvent. When shrimps are soaked, sprayed and/or rubbed with the preservative, the refreshing time of the treated shrimps can be effectively prolonged for 3-4 days. The preservative has the advantages of good filming and preservation property, high security, high antibacterial and anti-oxidation efficiency, long action time and the like.

The invention provides a preparation method of freeze-dried fruit, vegetable, nut and cereal yoghourt nutritive cubes. The preparation method comprises the following steps of cleaning fruits and vegetables, performing pulping, mixing and blending pulp with yoghourt, performing homogenizing, adding cereals, nuts and fruit granules, performing stirring, performing membrane filling, performing quick-freezing, performing demolding, performing vacuum freeze drying, and performing packaging so as to obtain the freeze-dried fruit, vegetable, nut and cereal yoghourt nutritive cubes. The freeze-dried fruit, vegetable, nut and cereal yoghourt nutritive cubes are produced by a vacuum freeze drying technique, so that original thermal sensitivity components and antioxidation components of products canbe sufficiently guaranteed, the color and the fragrance of fruits and vegetables and the activity of probiotics can also be guaranteed, and transportation and long term storage are facilitated; and besides, the cereals, the nuts and the fruits cooperate, so that the nutrition is more balanced.

The process of extracting pueraria polysaccharide includes the following steps: milling slurry with kudzu vine root, adding cellulase and protease into the slurry for enzymolysis and simultaneous low strength ultrasonic treatment, adding vitamin C and xylose for protecting color, filtering to eliminate fiber, centrifugally separating the filtrate to eliminate starch, vacuum concentrating the centrifugate, adding alcohol before further centrifugally separating to obtain wet pueraria polysaccharide, and drying to obtain pueraria polysaccharide product. The present invention has raised enzyme activity and substrate converting rate, raised extraction rate of polysaccharide and flavone, effective prevention of browning, and natural color of the product.

The invention discloses a composition for preventing browning of a plant tissue culture. The composition contains a direct antioxidant against phenolic substances and a plant antioxidase system reinforcing agent, and can play the systematic synergic action of two anti-browning mechanisms during the plant tissue culture process, on the one hand, the anti-oxidation action of the anti-oxidant can be realized against the phenolic substances infiltrating into a culture medium so as to reflect the direct reduction action, on the other hand, the plant antioxidase system reinforcing agent can reinforce the activity of antioxidase in strawberry tissues in plant tissues, and the production and the expansion of basic factors of the browning, namely quinone type substances can be reduced; and the combination of the two can effectively prevent the browning phenomenon in primary culture of strawberries and reduce the browning rate from the conventional level of above 30% to below 20%. The composition disclosed by the invention is widely suitable for various plants which are prone to browning in different tissue culture stages. The invention further discloses a using method of the composition.

The present invention discloses a preparation method for high-fiber recombinant asparagus chips, and belongs to the deep processing field of fruits and vegetables. The asparagus chips use discarded scraps of old stems and old roots from asparagus production enterprises as raw materials, and are prepared by the following steps: pre-treating the raw materials, blanching the materials in hot water, preserving color, conducting beating, mixing the materials with adjuvant materials, cooking the mixture for a short time, placing the mixture on plates, drying the mixture under vacuum by two section-type microwave to a moisture content of 10% -15%, drying the mixture by short- and medium-wave infrared method under vacuum to a moisture content below 5%, and packaging the mixture to obtain the end products. The dietary fiber content of the asparagus chips is 8.35% - 10.27%, and every 100g of the chips contains flavonoids 12.73-16.86 mg, polysaccharide 9.34-11.28 mg. The preservation rate of chlorophyll is 70% to 75% after processing, and the chip breaking force is 1123-1443 g. The preparation method provides a novel method for taking full advantage of asparagus scraps, and the microwave vacuum drying and the short- and medium-wave infrared vacuum drying have advantages of quick drying, low temperature and higher nutrient retention rate, etc. The asparagus chips are high in cellulose content, rich in flavonoids, polysaccharide and other active substances, crispy and delicious in taste and high in nutritional value. Therefore, the asparagus chips are leisure crisps for people of all ages.

The invention discloses a processing method for drying litchi pulp and longan pulp. The method comprises the following steps of: selecting litchi or longan fruits as a raw material, performing blanching and color protecting treatment on the shelled and denucleated pulp, drying the treated pulp by using hot air to obtain a semi-dry product, and performing microwave vacuum drying till the water content of the product is 10 to 15 percent. The product is golden, thick in flavor, sweet and sour and attractive in appearance; the nutritional components are kept well; and the quality of the product is obviously superior to that of the traditional dehydrated litchi pulp or longan pulp product. The processing method has the characteristics of health, environmental friendliness, short production period, low operating cost and high energy utilization rate, and is favorable for improving the market competitiveness of the dried litchi and longan products.

The invention relates to a method for preparing high-concentration soya-bean milk. In the method for preparing the high-concentration soya-bean milk, the high-concentration soya-bean milk is prepared by sorting, cleaning and immersing soybeans, pulping, batching, stewing pulp, deactivating enzyme, performing superfine grinding, homogenizing, degassing, performing quantitative packaging, sterilizing, cooling, and blowing dry sequentially. Compared with the prior art, the method for preparing the high-concentration soya-bean milk has the advantages that: the high-concentration soya-bean milk has high nutritional value by adding abundant edible ingredients, and due to the full utilization of bean dregs, the content of dietary fibers in the soya-bean milk is improved. In addition, in the preparation process, bean immersing water is utilized effectively to realize the zero release of production and protect environment.

This inventionm discloses a method for brewing dry-type lichee wine including taking lichees as the raw material, squeezing them, fermenting with barm at low temperature, hydrolyzing them with bio-enzymes, metabolic controlling fermentation and clarifying and filtering them to get the raw wine, which is processed for stability including: adding metal ionic complexant to coordinate metallic ions in the spirit to suppress browning of non-biologies, adding silica gel at low temperature to adsorb cold turbid proteins in the spirit and adding bio-antioxidation enzyme resisting against oxidation browning of the lichee wine.

The invention belongs to the technical field of storage and preservation of agricultural products and particularly relates to a crystal grape storage and preservation method, comprising the steps of (1) spraying 1500-2000 times of Trichoderma agent, namely natamycin composite bacteriostatic agent one day before bagging, and picking when reaching 70-80% of maturity; (2) removing bags after picking, picking out rotten fruits, waxing pedicles, subpackaging PE preservation bag lined transfer boxes, healing at normal temperature in the shade for 12-24 h, placing the transfer boxes in a cold store, and sterilizing the cold store and fruits with ozone or ultraviolet; (3) precooling in the cold store at 1.0+/-0.5 DEG C for 24 h, adding a sterilizing agent and an ethylene blocking agent, tying the bags and storing. Severe biological disease damage, short shelf life, proneness to browning and other problems in existing crystal grape are solved, the shelf life of crystal grape is extended from 7 days to 60 days which leaves 6 days for the sales time, and the crystal grape storage and preservation method is simple to perform, high in efficiency and good in safety.

The invention discloses grenadine juice and a preparation method thereof, which belongs to the field of fruit juice processing. The grenadine juice is prepared by mixing the following components in mass ratio: 1000 parts of 100 percent of raw grenadine juice, 0.1-0.3 parts of vitamin C and 1-3 parts of citric acid. In the preparation method for the grenadine juice, an ultrahigh-pressure treatmenttechnology is adopted to carry out sterilization and enzyme deactivating, and whole grenadine fruits are pulped, thus, the original flavor and mouth feeling are kept in the processed grenadine juice,and moreover, the effective components in grenadine hulls and seeds are kept to the maximum. The grenadine juice has the effects of promoting the production of body fluid to quench thirst, killing insects, inducing astringency, astringing intestines, relieving diarrhea, stopping bleeding and the like. Through proper blending, certain peculiar smells of the grenadine juice are removed, the grenadine juice is effectively prevented from browning in the storage process, and the shelf life is prolonged.