89 results about "Acidity.titratable" patented technology

The invention discloses a storage and prevention two-stage compound pretreatment method for apples and pears, which comprises the following steps: firstly, performing fumigation treatment on the picked apples and pears at normal temperature by using 1-methylcycloproene, wherein the content of 1-methylcycloproene is between 500 and 1,000nL L-1 and the fumigation time is between 18 and 24 hours; then, soaking the apples and the pears in 3 to 6 percent aqueous solution of CaCl2 for 3 to 5 minutes; and taking the apples and the pears out, drying the apples and the pears, and refrigerating the apples and the pears by the conventional method. The method can effectively prevent surfaces of the apples and the pears from browning, preserve the senescence of fruit, prevent the flesh of fruit from softening and preserve the nutritional quality, particularly can make contents of hardness, titratable acid, ascorbic acid and Vc of the fruit in a high level index in the later period of storing, is obviously superior to the effect of single treatment, and makes the surface brown index of bagged Huangguan pears declined by 71.6 percent.

The invention relates to a special bio-organic fertilizer for peaches and a preparation method thereof. The bio-organic fertilizer comprises the following components in parts by weight: 15-85 parts of a fertilizer organic matter; 0-30 parts of an organic compound; 0-50 parts of an inorganic compound; 0-10 parts of sulfuric acid; 0-2 parts of souring and ripening powder; 0-2 parts of a deodorant; and 5-35 parts of biological bacteria liquid. The bio-organic fertilizer of the invention can improve fruit setting percentage, average weight of single fruit, yield and quality factors of peach trees, and lower the content of titratable acid, thus greatly improving the economic benefit of peach farmers.

The invention discloses application of melatonin to fruit and vegetable preservation and a fruit and vegetable preservation method. After fruits and vegetables are treated by the exogenous melatonin with proper concentration, the weight loss ratios of the fruits and the vegetables can be remarkably reduced in the storage process, the respiratory rate and the ethylene release rate of fruits can be inhibited, and the basic metabolism of the fruits and the vegetables can be weakened. Therefore, high pulp hardness as well as high content of soluble solids and titratable acid of the fruits and the vegetables can be maintained. Furthermore, after the fruits and the vegetables are treated by the exogenous melatonin, the nutritional ingredient loss of the fruits and the vegetables can be remarkably reduced, and the content of ascorbic acid and total phenols of pulp can be effectively maintained.

The invention relates to a method for sterilizing fruit and vegetable juice. The method comprises the following steps: preheating the fruit and vegetable juice, and carrying out ultrahigh pressure homogenization treatment and mild heat treatment on the fruit and vegetable juice, wherein the feeding temperature in the ultrahigh pressure homogenization treatment is 50-60 DEG C, the pressure is 100-400MPa, and the temperature of the mild heat treatment is 50-60 DEG C. By adopting the method provided by the invention, indigenous flora in the fruit and vegetable juice can meet the national food hygiene standard, and escherichia coli is decreased by at least 5.0 log units to meet the requirements on health and safety of non-thermal sterilization regulated by American FDA. The quality and the nutritional ingredients of the fruit and vegetable juice prepared in the invention can be well kep under the condition of guaranteeing the requirements on the health and safety, and the color and luster, pH, titratable acid, soluble solids and antioxidant capacity have no remarkable change; sensory evaluation and analysis show that the smell, taste and flavor are much better than those of pasteurized fruit and vegetable juice.

The invention relates to a production process and a product of a drink prepared from Citruswilsonii Tanaka, and belongs to the field of the deep processing of agricultural products. The Citruswilsonii Tanaka at the yellow ripening stage, which is dulcet in aroma but sour and bitter in taste and not suitable for fresh eating, is served as a raw material, wherein the raw Citruswilsonii Tanaka juice contains 3.0% to 10.8% of Brix as a soluble solid, 7.3% to 20% of titratable acid, 150mg/L to 190mg/L of naringin and 120mg/L to 310mg/L of limonin. The production process comprises the following steps: cleaning, crushing, squeezing and filtering the Citruswilsonii Tanaka, thereby obtaining the raw Citruswilsonii Tanaka juice; and debitterizing, blending, homogenizing, degassing, sterilizing and filling the raw Citruswilsonii Tanaka juice, thereby obtaining the Citruswilsonii Tanaka juice drink. The Citruswilsonii Tanaka juice drink contains 5% to 10% of the raw Citruswilsonii Tanaka juice by mass percent. By fully utilizing the Citruswilsonii Tanaka rich in nutritive and active ingredients, the obtained drink is sour and sweet and has the delightful aroma characteristic of the Citruswilsonii Tanaka as well as the health-care function.

The invention belongs to the technical field of fruit planting and particularly relates to a cultivation method capable of increasing cherry nutrition content. The cultivation method specifically includes the steps of firstly, before cherry trees germinate, planting field soil is deeply ploughed at the depth of 20-22cm, watering is continuously performed twice, the time interval between two watering is 4-5 days, the watering quantity of each watering is 670-680mL/plant, furrowing is performed 2-3 days after the watering, biological organic fertilizer is applied to the roots of the cherry trees, the root application depth is 18-20cm, and compacting the soil after the root application; secondly, nutritional liquid is sprayed to leaf surfaces once before blossoming, the nutritional liquid is sprayed to the leaf surfaces once before fruiting, and weak flowers and weak fruits are removed before the nutritional liquid spraying; a calcium superphosphate aqueous solution is applied to the roots of the cherry trees from the period before blossoming until harvesting, the root application is performed every other 16-18 days, and the root application quantity of each time is 245-250mL/plant. By the method, the soluble solid content, titratable acid content and VC content of cherries can be increased effectively, and the flavor and nutritional value of the cherries can be increased.

The invention discloses a method for keeping papayas fresh. In the method, the papayas are soaked in hot water, of which the temperature is between 60 and 65 DEG C, and the fruits are naturally cooled after 5 to 300 seconds; moreover, the papaya fruits are stored and kept fresh in the pedicel processing mode, so that the freshness keeping effect is quite obvious. The method optimizes heat treatment steps and conditions of the papayas, greatly shortens the time of heat treatment for keeping the papayas fresh, prolongs the shelf period of the papaya fruits, guarantees the hardness and the certain amount of soluble solid matters and titratable acid of the fruits, improves the quality and the commodity rate of the papaya fruits, and effectively improves the working efficiency of the heat treatment. The method is nontoxic and environment-friendly, adopts a simple operating process, and is low in cost and suitable for large-scale commercialized storage.

The invention discloses a compound preservative for strawberry. The compound preservative comprises the following components in percentage by weight: 1% of chitosan, 0.81% of kojic acid, 0.36% of calcium chloride, 0.03% of natamycin and 97.8% of water. The invention further discloses a method for processing strawberries by using the compound strawberry preservative; the method comprises the following steps: (1) selecting strawberries and washing with water; (2) immersing the drained strawberries in the compound preservative for 1 minute, taking out the strawberries, and naturally drying; (3) putting the strawberries in a fresh-keeping tray, covering the strawberries with a preservative film, and storing at room temperature. The compound strawberry preservative provided by the invention can be used for effectively reducing the loss of external composite index, respiration intensity, titratable acid, soluble solids and sugar content of strawberry, and preventing rot; the compound preservative which can be used for processing the strawberries is high in safety, pollution-free and easy to clean; and the method is a safe and efficient fresh keeping method.

The invention belongs to the field of genetic breeding, and provides a molecular marker of single fruit weight major quantitative trait loci (QTL) of August red pyrus L. fruits and application of the molecular marker. The genetic linkage map of August red is constructed by using SRAP (sequence-related amplified polymorphism), SSR (simple sequence repeats) and AFLP (amplified fragment length polymorphism), phenotype identification on single fruit weight of pyrus L. is combined, and an interval mapping method is used to analyze linkage groups, thus major QTL is detected on the seventh linkage group of August red and can explain 30.9% of characteristics of single fruit weight. The point which is the nearest to the major QTL site Pfw-1 is marked to be EACAMCAC-2000m, and the nearest distance is 1.019cM. The obtained titratable acid major QTL molecular marker has significant theoretical and practical means for quickening genetic improvement process of pyrus L. varieties and improving breeding selection efficiency.

There is provided an infusion solution for peripheral intravenous administration comprising a multichamber vessel constructed in a connectable manner, which separately houses a sugar solution containing sugars, electrolytes and vitamin B1, and an amino acid solution containing amino acids, electrolytes and a sulfite, whereby the vitamin B1 and amino acids are stably maintained. In the infusion solution for peripheral intravenous administration, the sugar solution contains calcium gluconate, contains no greater than 1.4 g/L sodium lactate, has a pH of 4.0-4.7 and has a titratable acidity of 2-4, the amino acid solution contains 4.0-8.0 g/L sodium lactate, contains no calcium gluconate, has a pH of 6.8-7.2, contains free L-cysteine as cysteine and contains 0.05-0.2 g/L sodium hydrogen sulfite, and after the sugar solution and amino acid solution have been mixed, the infusion solution has a pH of 6.5-7.1 and a titratable acidity of 5-10.

The invention provides a method for detecting the maturity of actinidia arguta. The method comprises the steps of from 70-97 days after full-bloom stage, picking fruits optionally every day, measuring the basic indexes of the picked actinidia arguta in the same day, detecting the six physiological and biochemical indexes including fruit hardness, soluble solid, titratable acid, starch, tannin and fruit and seed degreening index, and correspondingly establishing four classification standards of the maturity; measuring classification standard maturity ranges of the four or more physiological and biochemical indexes of the sample to confirm grade of maturity of the fruits of the sample. After the method is adopted, the maturity of the actinidia arguta can be effectively detected, so that the best picking times of the actinidia arguta with different selling demands can be confirmed, the freshness, the color, the aroma and the taste of the fruits can be guaranteed in the subsequent storage or processing process, the demands of the market and the business can be well met, the economical benefit is increased, and powerful technical support is provided for the actinidia arguta industry.

The invention discloses a fertilizer application combination applicable to planting gala apples in mountainous regions, as well as a ground management method. The ground management method comprises the following four steps: (1) confirming the fertilizer application quantity; (2) confirming fertilizer application stages and the fertilizer application quantity at each fertilizer application stage; (3) applying a fertilizer by adopting a hole sowing manner; and (4) strictly controlling the irrigation quantity. Through the steps, the solid content of gala apples can achieve 13.8-14.5% (control is at 12.5-13.2%), the content of titratable acid is in general at 0.27-0.33% (control is not less than 0.38%), the acidity is reduced while the solid content is increased, the flavor and storage of fruit can be improved, and the degradation of variety can be effectively prevented; by adopting the hole sowing fertilizer application method instead of deep-groove fertilizer application mode, the fertilizer application quantity can be greatly decreased by more than 50%, the labor for fertilizer application can be reduced, and the planting cost can be effectively lowered; in addition, by adopting farmyard manure combination, fruit trees are facilitated to take in various needed nutrients during growth; the irrigation quantity is strictly controlled, so that not only can the water demand of fruit trees be met, but also water can be saved.

The invention provides a method for improving the quality of a loquat fruit by agricultural measures, which combines the reflection film spreading in an orchard and the suspension of magnets. The invention can accurately and effectively adjust and control key enzymes for forming and degrading the main organic acid (malic acid) of the loquat fruit. At the early growth stage of the fruit, the invention improves the activity of phosphoenolpyruvate carboxykinase and NAD-malic dehydrogenase in the pulp; and at the most critical stage for the accumulation of organic acid of the fruit, the invention can promote the activity decline of the PEPC in the pulp, obviously inhibit the activity of the NAD-MDH and enables the activity of NADP-ME in the pulp, reduce the synthesis of malic acid and enhance the degradation of malic acid, thereby obviously reducing the organic acid content of the fruit of the high-acid content loquat, and simultaneously increasing the TSS content of the mature pulp. The invention can obviously reduce the titratable acid (TA) in the fruit and increase the soluble solid (TTS) content of the mature pulp and the weight of a single mature fruit, thereby obviously improving the quality of the mature loquat fruit.

A natural fruit and vegetable preservative containing a solomonseal rhizome extract product and a preparing method thereof are disclosed. The preservative comprises following components by weight: 5-20% of the solomonseal rhizome extract product and 10-30% of an emulsifying agent, with the balance being water. A preparation of the solomonseal rhizome extract product, which has a content of 12.5 g/L, reduces the rotting rate and the rate of water loss of fruits and vegetables in in-vitro preservative experiments of apple and pepper, improves flavor and quality of fruits (namely contents of soluble sugar, titratable acids, vitamin C, chlorophyll, and the like are increased), and prevents senescence of fruits and vegetables (with generation of malonaldehyde being reduced, and activity of catalase being maintained). The preservative is easily available in raw materials, simple to process and safe to the environment, has antiseptic and fresh keeping effects, and is a natural fruit and vegetable preservative suitable for production of pollution-free agricultural products.

The invention relates to the field of agricultural science and technology, in particular to a color card for determining the maturity level of blueberry fruit. The color card is established by linkinginternal physiological and biochemical change of the fruit and external color and structural features of the fruit according to the relationship between the color of the blueberry fruit and the fruitquality and capable of reflecting different maturity periods of the blueberry fruit. The blueberry fruit of different maturity levels is divided into 6 stages according to the color to serve as a research sample determine size, quality, hardness, titratable acid, soluble solid matter, pectin, total phenol, flavonoids, anthocyanin and ABA content of the blueberry fruit in different periods. The relation between the color of the blueberry fruit and the fruit quality is analyzed. The color card capable of reflecting the different maturity periods of the blueberry fruit is developed to provide atheoretical basis for selecting suitable harvesting or purchasing time. The color card succinctly reflects the maturity level of the fruit, so that a user can select the suitable fruit conveniently.

The invention provides a method for improving the quality of loquat fruits. In the method, a light reflection film is laid and ethylchlozate is sprayed. The method can obviously lower the organic acid in the loquat fruit, and improves the soluble solid state material in the fruit and the fruit quality. The light reflection film is laid and ethylchlozate is sprayed in an orchard to obviously lower the titratable acid (TA) in the fruit and improve the content of the total soluble solid (TSS) of ripening pulp, and the weight of the single fruit of the ripening fruit, thus obviously improving the ripening fruit quality of the loquat.

The invention discloses a method for preserving red date by coating, and belongs to the technical field of fruit and vegetable preservation. The method is mainly technically characterized in that: the red dates are coated with a composite preservation consisting of chitosan, corn starch and CaCl2. By the method, the hardness and Vc content of the red dates can be effectively kept, rot and browning are inhibited, and the content of soluble solid state materials and titratable acid is reduced, so that the storage period of the fresh red dates is effectively prolonged. The invention has the advantages that: the preservation method has characteristics of simplicity, convenience, high efficiency, safety and practicability, the red dates can be stored for 6 months at low temperature or more than 1 month at normal temperature and the original quality of the fresh red dates is kept. The method is suitable for large-scale commercial application, and has wide application prospect and good economic and social benefits.

The invention relates to a fruit and vegetable fresh-keeping method, a fruit and vegetable fresh-keeping agent and an application. The fruit and vegetable fresh-keeping method comprises treating fruits and vegetables to be refrigerated by using the fresh-keeping agent, wherein the fresh-keeping agent contains arachidonic acid. The fruit and vegetable fresh-keeping method, the fruit and vegetable fresh-keeping agent or the application provided by the invention relates to arachidonic acid, and has the effects of obviously reducing chilling injury indexes of the fruits and vegetables, inhibitingthe increase of cell membrane permeability of the fruits and vegetables and the accumulation of malondialdehyde, relieving the occurrence of chilling injuries of the fruits and vegetables, delaying the decline of the content of soluble solids in the fruits and vegetables, inhibiting the increase of the content of titratable acid, and thus improving the quality of the fruits and vegetables under low-temperature storage.

The invention discloses a method for predicting titratable acid content after mango impact damage based on hyperspectrum. The method comprises dividing mango samples into an undamaged control group and a damaged experimental group, making the samples in the experimental group freely fall from different heights, acquiring hyperspectral images of all the samples through a hyperspectral imaging system, simultaneously, determining titratable acid content of the mango through an indicator titration method, and building a fruit titratable acid content predicting model through combination of a spectrum pretreatment method, a characteristic wavelength extraction method and a statistical method, wherein the model is used for predicting titratable acid content after mango impact damage. The method effectively evaluates the influence caused by mechanical damage on the mango fruit titratable acid content based on the hyperspectral imaging technology and the mathematical modeling process, has the advantages of no damage, rapidness and accuracy and effectively detects titratable acid content change of the damaged mango.

The invention discloses a composite preservation method for a winter jujube. The composite preservation method comprises the following steps: firstly taking and purchasing 200g of raw propolis, smashing, extracting with 1L of ethanol with the concentration of 95% in a room-temperature dark condition for 10 days, filtering to obtain a propolis and ethanol extract liquid; according to the initial concentration, preparing a propolis coating preservative with the concentration of 4% from the propolis extract liquid with distilled water; carrying out acetic acid fumigation treatment on the winter jujube fruit at 22+/-1 DEG C for 40 minutes, airing and then carrying out coating treatment with the propolis coating preservative; airing the winter jujube and then packing into a clear preservation bag; and storing in a refrigeration house at -2-1 DEG C to -2+1 DEG C when Rh is 90%+/-5%. Various testing indexes of the winter jujube show good quality and freshness; the rotting rate can be reduced to about 7%; hardness reduction is effectively inhibited; relatively high VC content is kept; the change of the soluble solid content and the titratable acid content of the jujube fruit is relatively small and stable; and the preservation quality of the winter jujube in large-scale storage is improved.

The invention relates to an application of high voltage electric filed in fruitage, in particular to a method for treating tomato with an alternative electric field. The method of the invention solves such critical problems of the prior art as long time for treating tomato under a constant high voltage electrostatic field , complicated operation and big electricity leakage while a high voltage is loaded. The tomatoes are placed in a high voltage alternative electric field environment at a frequency of 40kHz, an electric field intensity of 200kV/m and treated for 2 hours at a time, which can delay the ripening process of fruitage such as reddening and softening. The invention has the effects of deferring the hardness of fruitage, the decrease of soluble sugar content in the fruitage and chlorophyll content in fruit peel, the rising of titratable acid and lycopene content, etc.

The invention discloses a grape labor-saving shaping and pruning cultivation method. The method comprises the steps of constructing shed frames, digging field planting pits, conducting field planting,conducting fertilizer water management, conducting shaping and pruning, conducting flower and fruit management, conducting ear bagging, conducting plant disease and insect pest management and the like. According to the method, a traditional cultivation method of grapes is improved, a scientific method is provided for field planting management, fertilizer water management and flower and fruit management and particularly for shaping and pruning of the grapes to facilitate germination of sprouts, forming of fruit branches and growing of new shoots, maturation period is a week earlier than the traditional cultivation method, soluble solid content and anthocyanin content are significantly improved, titratable acid content is reduced to an extent, single fruit quality of the grapes is significantly improved, and the method is superior to a conventional shed frame cultivation method. The cultivation method has the advantages that the method is easy to understand, specific operation is labor-saving, and technical supports are provided for expanding development scale of grape cultivation, achieving long-term stable supplying of fresh grapes and improving economic benefits of growers.

The invention discloses a planting method of Holboellia latifolia. The planting method includes the steps of firstly, selecting a field; secondly, preparing soil; thirdly, culturing seedlings throughcuttage; fourthly, transplanting; fifthly, sowing Astragalus sinicus through broadcast sowing; sixthly, performing Holboellia latifolia field management. The planting method has the advantages that the Astragalus sinicus is planted below the canopy frame of the Holboellia latifolia, a good rhizosphere environment is provided for the Holboellia latifolia, soil moisturizing is benefited, the nitrogen fixation effect of the Astragalus sinicus is utilized to save nitrogen fertilizer, disease control is performed by using fruit and vegetable fermentation liquor in a fruiting period, insect killingand sterilizing are achieved while nutrition is provided, and the method conforms to the production concept of organic green food; the edible rate of the Holboellia latifolia planted by the method is19.80%, the Vc content of the Holboellia latifolia planted by the method is 0.75g/100g, the total soluble sugar content of the Holboellia latifolia planted by the method is 2.10%, and the titratable acid content of the Holboellia latifolia planted by the method is 0.43%.