38 results about "Bivalve mollusk" patented technology

The invention belongs to the technical field of biological monitoring environment, and specifically relates to a shellfish monitoring method for ocean oil spill pollution. The shellfish monitoring method comprises the steps of utilizing typical bivalve mollusk such as short-necked clam and chlamys farreri in China to determine the shellfish visceral mass autioxidant enzyme activities including superoxide dismutase, glutathione glutathione S-transferase, peroxidase, glutathione peroxidase and catalase activity, integrating the enzyme activities so as to form an integration biomarker responding index (IBR), establishing a dose-effect relationship between the IBNNR and petroleum concentration, adopting a one-dimensional variance components method (ANOVA) to carry out notable difference analysis, determining the forcing degree of petroleum pollution on organisms, and finally judging pollution level of the ocean oil spill.

An optimization feeding method for shrimp culture includes feeding according to the current feeding time and mode, its characteristcs are during the maturation period of shrimp to adopt natural animal baits and compound feeds by 2-4 :1 frequency or weight ratio to feed in turn; the said natural animal baits are sleeve-fishs, clamworms, minitype shrimps and crabs or bivalve mollusks which can be fed naturally by shrimp; the said compound feeds are juvenile shrimp or adult shrimp containing protein over 40 percent. To adopt this feeding mode of the present invention can promote shrimp growth, improve feed conversion efficiency and avoid feed resource waste caused by selectivity.

The invention belongs to the technical field of marine biology, and in particular relates to a universal RPA nucleic acid isothermal amplification primer, a kit and an application thereof for bivalve mollusks infected with herpes virus OsHV‑1. The primers are a set of amplification primers, consisting of upstream and downstream primers and probe primers; the upstream primers are shown in SEQ ID NO.1; the downstream primers are shown in SEQ ID NO.2; the probe primers are shown in SEQ ID NO.3 shown. The present invention designs general-purpose RPA amplification detection primers for 7 kinds of OsHV-1 mutant strains in currently known four kinds of bivalve hosts, and establishes a test strip RPA detection system and method for OsHV-1. On-site rapid screening and detection of OsHV‑1 is of great value and has broad market application prospects.

The invention relates to the field of aquatic biology, in particular to a method for accurately obtaining the shape of a bivalve shell cavity and measuring its volume. Filling the shell cavity of the bivalve mollusc to be treated with material, so that the filler fills and shapes the entire cavity; after compaction, the cavity filling material is taken out to obtain the complete shell cavity shape of the bivalve mollusk. The application of the method to obtain the morphology of the shellfish shell cavity in determining the volume of the shell cavity. The method can accurately obtain the shell cavity volume of the measured shellfish, and the method has universal applicability to bivalve shellfish, not only applicable to shellfish with regular shell shapes such as clams, but also to shellfish with irregular shell shapes such as oysters, and scallops, etc. The same applies to shellfish whose shell cavity cannot be completely closed.

The invention relates to a device used for matching with the measurement for respiration and excretion of aquatic animals, in particular to an attachment used for matching with various dissolved oxygen probes to measure the respiration and the excretion of various aquatic animals such as fish, shrimps as well as crabs, bivalve mollusks, sea cucumbers, etc. living in freshwater or seawater. The device takes an organic glass slab-bottom at the bottom of a crude organic glass tube as a back cover to form a vessel; a concentric-circle organic glass flange provided with holes is sleeved on the upper end of the crude organic glass tube at the height parallel to a nozzle; an organic glass cover plate is arranged on the top of the organic glass flange to be used as an upper cover; a fine organic glass tube and a PVE tube cuff are arranged on the organic glass cover plate; the PVE tube cuff is inserted into the dissolved oxygen probes in a sealing way; a diving pump is arranged under the PVE tube cuff. The device solves the problems that the prior art cannot reflect the metabolic status of the aquatic animals factually and accurately, etc., and has the advantages of simple structure, low manufacturing cost, being easy to match with correlated instruments to detect accurately, etc.

The invention discloses a technique for controlling mesoplasm in processing instant scallop, which is a proper processing technique established aiming at the variation of myofibril of scallop through systematically studying the protein compositions of marine bivalve mollusk of pectinidae and the characteristics of the processing process. The technique comprises the following steps of: eviscerating the hot myofibril, the frozen myofibril or the directly fetched myofibril at 20-40 DEG C, immersing in 0.5-3% NaCl for 20-50 min, leachating for using; immersing molluse meat in spice soup with 1-2 times of mass at 50-70 DEG C for 0.5-5 h to achieve tasty effect and shaping the shape of protein tissue; and then slowly heating to be cured in the original spice soup; immersing the edible muscle parts of the fully cured mollusk in an envelope solution containing sodium alga acid and konjaku powder for 3-10 S, and then taking out and leachating; directly vacuuming and packaging the enveloped raw materials, or introducing nitrogen to package, or quickly freezing in an instant freezer to shape the state, and then rapidly vacuuming and packaging, or introducing nitrogen to package; directly freezing the packaged myofibril products for selling, or sterilizing at 90-120 DEG C for 30-60 min, freezing, storing in cold, or being ready for selling at the normal temperature.

The invention discloses an induction and extraction separation method of marine organism-sourced high-efficiency heavy metal removing agent shellfish metallothionein. The induction and extraction separation method comprises following steps: (1) a selected bivalve mollusk is subjected to 2 to 7 days of temporary rearing in clean seawater, and dead ones are removed; (2) directional induction is carried out; (3) shells are open so as to collect shellfish meat, a buffer solution is added at a certain ratio, and an obtained extracted solution is subjected to thermal treatment so as to remove impurity protein; (4) the extracted solution is cooled, and is delivered through a screen so as to remove precipitates via filtering, an obtained supernate is subjected to multi-stage ultrafiltration and microfiltration, is delivered through a nanofiltration multielement film integrated purification system so as to remove macromolecules, and is subjected separation purification and concentration so as to obtain a MT crude product; and (5) the MT crude product is subjected to dextrangel and ion-exchange column chromatography combined-purification separation, and drying so as to obtain a high-purity marine organism-sourced MT product. The induction and extraction separation method is capable of increasing metallothionein content in shellfish effectively, and obtaining marine organism-sourced high-efficiency heavy metal antidote products which possess high efficiency removing effects on heavy metal, and are safer.

The invention relates to the technical field of purifying heavy metal in edible marine products, and discloses a method for purifying cadmium in bivalve mollusc, which comprises the following steps: adding nano calcium carbonate suspension, magnesium ion water solution, vitamin C and casein phosphopeptide into the water body cultivating the bivalve mollusc; replacing the water body every day, reading nano calcium carbonate suspension, magnesium ion water solution, vitamin C and casein phosphopeptide. According to the invention, the method is simple in operation, the purification cost is low and the operation time is short, the Cadmium ion residue in the edible bivalve bodies can be efficiently purified, and the product quality and flavor are not affected. According to the invention, when the bivalve mollusc polluted by Cadmium is treated by using the method, the removal rate of cadmium in the bivalve mollusk bodies can reach 36.5-38.4% after 7 days.