60 results about "Gracilaria gracilis" patented technology

The invention discloses a method for extracting agar from gracilaria with an enzymatic method. After gracilaria is soaked, cellulose and protease are added for enzymolysis, and gracilaria slag in enzymatic hydrolysate is filtered; after the gracilaria slag is subjected to bleaching, acidification and washing treatment, an appropriate amount of water is added, water is boiled to 95 DEG C for glue extraction, and enzyme activity is killed; a glue solution is filtered while hot, 95% ethyl alcohol with a volume of two to three times of that of the glue solution is added to the glue solution rapidly, precipitation is centrifuged or filtered, dehydration is performed twice with absolute ethyl alcohol, and drying is performed, so that an agar product is obtained. The main ingredient of agar in gracilaria is separated with a clean and efficient biological enzyme treatment technology, and the defects of a conventional alkali treatment technology are overcome; before glue extraction is performed on gracilaria, sodium hypochlorite is replaced with hydrogen peroxide for bleaching treatment, the bleaching effect is remarkable, and the problems of chloride ion residues and pollution caused by a sodium hypochlorite bleaching method are solved; and finally, agar is rapidly precipitated from the glue solution with a simple, convenient and feasible alcohol precipitation method, the production period is greatly shortened, and the cost is greatly reduced.

The invention relates to a method for improving gracilaria agar gel strength and belongs to the technical field of food production. The method aims to prepare high-strength agar by adding a microorganism enzyme namely transglutaminase into agar and specifically includes: dissolving agar powder in hot water to prepare 1.5% agar solution, boiling agar for a certain time until the agar is completely dissolved, adding transglutaminases of different concentrations within a certain temperature and pH range, stirring for reaction for a few minutes, standing at the room temperature to enable the surface to be solidified, placing at constant temperature for gelling for a few hours, and measuring the gel strength. The gel strength of the agar is evidently improved when addition amount of the transglutaminases is 0.01%-1.0% (g/g, relative to dry weight of agar powder). The method has the advantages that the agar is assuredly edible by using the biological method for improving gel strength, nontoxic, harmless and pollution-free, and the method is simple in operation and low in production cost.

The invention relates to a preparation method of temperature-sensitive type gracilaria agar complex gel, and belongs to the technical field of gel preparation. The method includes the steps of preparing gracilaria agar from fresh gracilaria serving as the raw materials together with thrice sterile water under specific conditions, mixing gracilaria agar with ethyl alcohol and other substances to form a gracilaria agar ethanol solution, making the solution mixed with chloroacetic acid and other substances under specific conditions, and conducting filtering, concentrating and drying to obtain the gel. The method has the advantages that the medicine carrying capacity is strong, the slow-release time is long, and high stability is achieved; the medicine utilization rate is high and is improved by 10-15%, the preparation steps are simple, and cost is low.

The invention provides a method for extracting agar from gracilaria. The method comprises the following steps: 1) performing alkali treatment: placing and treating gracilaria plants free of impuritiesin an alkali solution, and removing the alkali solution after the treatment is finished; 2) crushing: crushing the gracilaria prepared in step 1) to obtain a crushed feed liquid; 3) heating for extracting agar: supplementing water to the feed liquid obtained in step 2), and performing heating for extracting agar; 4) carrying out deslagging treatment through plate-frame filtration; 5) carrying outdecolorizing treatment by adopting activated carbon; and 6) performing dehydrating and drying to obtain the agar. The gracilaria subjected to alkali treatment is mechanically crushed to form a colloidal solution, the colloidal solution subjected to heating, agar extraction, squeezing and filtration is subjected to decolorizing by using powdered activated carbon, and then undergoes freezing dehydration or squeezing dehydration and drying to obtain the agar product, so the product has a stable yield, a stable quality and a slightly yellow or white appearance. Hydrochloric acid, oxalic acid andthe like are not needed in the whole processing and production process, a chemical bleaching agent is not needed, the water consumption is only about 40% of that of a traditional method, and the generated wastewater amount is also greatly reduced.

The invention discloses a mixed culturing method of gracilaria and epinephelinae. The method is characterized in that a pond culturing mode is adopted, a water inlet channel and a water outlet channel are formed in a pond, and cleaning, sterilizing and disinfecting need to be firstly carried out on a pond body; then seawater can be poured into the pond, and the water quality can be regulated to adapt to culturing; the depth of water in the pond is 0.3m-0.5m, and a pond-slope ratio is 1/5; the occupied culturing area of the gracilaria in the pond is more than 3/5, and the density for putting the epinephelinae is smaller than that of the epinepelinae which are independently cultured. According to the method disclosed by the invention, a high economic additional value and a high nutrient value of mixed culturing of the gracilaria and the epinephelinae are utilized; compared with the prior art, the mixed culturing technology has no need to apply a large amount of fertilizer to a water body, thus the pollution on the water body can be effectively avoided, substances of N and P in the water body can be effectively removed by the gracilaria in mixed culturing, the eutrophication of the water body can be effectively prevented, and higher ecological benefits can be obtained; meanwhile, the cost is low, the output is high, the economic benefit is good, and the method is a better source approach for supplementing the epinephelinae resource and broadening the gracilaria resource along the coast.

The invention relates to the technical field of biological culture for producing high-added-value products from microalgae, in particular to a haematococcus pluvialis culture medium, a preparation method thereof and a haematococcus pluvialis culture method. The haematococcus pluvialis culture medium comprises a basic culture medium, a gracilaria seaweed extract and lysine bacillus. According to the method, the gracilaria seaweed extract and the lysine bacillus are added in the haematococcus pluvialis culture process, so that the biomass of the haematococcus pluvialis and the yield of astaxanthin can be remarkably increased.

The invention discloses a technology with high utilization rate for extracting agar from gracilaria seaweed. Seaweed bodies are pretreated with a low-alkali high-temperature method, consumption of alkali is reduced, and product strength is improved; gel extraction is performed with a high-temperature pressurization method, and the gel output rate is effectively increased; the production cycle canbe shortened; a multi-stage vibrating screen filtration technology is developed, the seaweed with gel incompletely output is filtered and returned to secondary gel extraction, waste is reduced, and the gel extraction rate is increased; meanwhile, residues are modified and processed to form fertilizer and feed additives, so that the comprehensive utilization rate of raw materials is greatly increased.

The invention discloses a method for promoting growth of net cage apostichopus japonicus fry through macrophytic algae. The method comprises the following steps: (1) putting macrophytic algae: when the average water temperature of a pond is higher than 16 DEG C, selecting gracilaria lichevoides which grows vigorously and is healthy in color, removing miscellaneous algae, and putting gracilaria lichevoides into a 3 m * 1.5 m * 0.8 m net cage according to the density of 200-800 g/m < 2 >; (2) putting apostichopus japonicus fry: selecting disease-free healthy apostichopus japonicus fry, and putting 1 kg of apostichopus japonicus fry with the specification of 2000 fry per kilogram into each net cage; (3) performing illumination and water control: using a sunshade net to control the illumination at 3000-12000 lx in the daytime; controlling the temperature of the seawater in the pond as 16-33 DEG C, and controlling the salinity of the seawater at 25-34; (4) performing feeding and daily management: feeding once a day, wherein the feeding amount accounts for 5% of the weight of apostichopus japonicus fry. According to the method, the growth rate and the survival rate of apostichopus japonicus are increased, the production cost is greatly reduced, the production of apostichopus japonicus fry is ensured, and the wide popularization can be realized.

The present invention relates to the field of aquaculture, and particularly relates to a shallow sea ecological culture method for kelp, gracilaria, haliotis discus hanai, strongylocentrotus intermedius and apostichopus japonicus. The method comprises the specific steps of selecting a proper culture sea region; dividing the sea region into culture regions each with the area of 13 ha, wherein the two adjacent culture regions are an alga culture region and an abalone culture region respectively; and putting regular tetrahedron-shaped artificial fishing reefs at the bottoms of the alga culture region and the abalone culture region. The culture method effectively improves the system internal material and energy utilization efficiency, the annual production value per unit area is improved by 50% or above, the influence of culture production on the environment is effectively reduced, and ecological, efficient and low-carbon culture is realized.

The invention relates to an automatic agar filling and cooling system. The system comprises a gracilaria gel boiling device, an agar condensing device, a to-be-condensed agar conveying belt and a gelframe, the middle section of the to-be-condensed agar conveying belt is arranged below a discharge hole of the gracilaria glue boiling device; the to-be-condensed agar conveying belt extends leftwardsand penetrates into a condensation chamber; the agar condensing device is installed in the condensation chamber and comprises an agar condensation conveying frame, a first lifting conveying frame anda second lifting conveying frame, the left end of the second lifting conveying frame is in butt joint with a condensed agar conveying belt, and the condensed agar conveying belt penetrates out of theleft side wall of the condensation chamber; the gracilaria gel boiing device comprises a cooking tank body, a stirring mechanism and a cooking mechanism, the gel boiling speed and the gel gelling speed are effectively increased, workers can be effectively prevented from being scalded by agar, and the production efficiency is greatly improved.

The invention belongs to the technical field of seaweed cultivation, and particularly relates to an application of o-hydroxycinnamic acid in removal of harmful benthic diatom. The o-hydroxycinnamic acid is used as an algicide to remove the harmful benthic diatom, and the algicide-o-hydroxycinnamic acid used in the invention is an extract of gracilaria bailinae. Compared with a traditional diatom removal method, the application has the following remarkable advantages: (1) the diatom removal agent is easy to degrade in a natural environment and does not generate secondary pollution; (2) the effect is quick, the inhibition rate on adsorption type benthic diatom after 2 days, under the treatment of 3 mM/L o-hydroxycinnamic acid, exceeds 50%, operations are simple, and the manpower is saved; (2) the price is low and the acquisition is easy; therefore, the method for removing the harmful benthic diatom is an environment-friendly, efficient, and economical method of benthic diatom prevention and removal.