30results about How to "Raise the F value" patented technology

The invention discloses a double-telecentric fixed-focus lens, which is sequentially provided with a first single positive spherical lens, a second single positive spherical lens, a third single negative spherical lens, a fourth single negative spherical lens, The fifth single negative spherical lens, the sixth single positive spherical lens and the seventh single positive spherical lens; the second single positive spherical lens and the third single negative spherical lens are combined into cemented lenses; the fifth single negative spherical lens and the sixth single The combination of positive spherical lenses is cemented lenses; a diaphragm is arranged between the third single negative spherical lens and the fourth single negative spherical lens. The bi-telecentric fixed-focus lens of the present invention reduces the number of lenses, making the production cost lower; on the premise of less lenses, the structure is simpler, smaller in size, and lighter in weight. At the same time, the bi-telecentric fixed-focus lens also has The lens has the characteristics of small total length, large F value, and large maximum imaging surface.

The invention provides a method for preparing high-F-value oligopeptide by taking chlorella powder as a raw material. The method comprises the following steps: adding trypsin into chlorella protein according to 70000-90000 U / mg protein under the conditions that the pH is 8 and the temperature is 27-52 DEG C to carry out first enzymolysis; then carrying out second enzymolysis by using recombinant carboxypeptidase derived from aspergillus niger, wherein the enzymolysis conditions are as follows: the pH is 6.5-7.5, the enzyme addition amount is 3-7% of the protein amount and the enzymolysis temperature is 27-40 DEG C; and then adjusting the pH to 4.5, adding activated carbon according to a solid-to-liquid ratio of 1 to 10 to remove impurities, and conducting filtering to obtain a high-F-valueoligopeptide solution. According to the method for preparing the high-F-value oligopeptide, chlorella is taken as the raw material, the protein content is high, the cost is low and the yield is high.The F value of the product is easy to elevate, the production cost of an enzyme method is reduced, the energy consumption in a later purification process is reduced, environmental pollution is reduced, the high-F-value oligopeptide is effectively prepared, and industrial production and application of the high-F-value oligopeptide are promoted.

The invention discloses a method of preparing high F-value collagen peptide by hydrolyzing anglerfish fishskins. The method comprises the following steps: by taking anglerfish fishskins as a raw material, extracting collagen by acid liquor; then, fractionally hydrolyzing fishskin collagen by using stomach protease and flavourzyme under an ultrasonic condition; and finally, removing aryl and color, and after vacuum concentration, carrying out spray drying to obtain the high F-value collagen peptide. According to the method disclosed by the invention, leftovers of the anglerfish fishskins are effectively utilized, and the high F-value collagen peptide is prepared by hydrolyzing the anglerfish fishskins, so that not only is high nutritional value of collagen peptide extracted from the anglerfish fishskins utilized, but also the problem that the leftovers of the anglerfish fishskins pollute the environment and lead to waste of resources is further solved. The collagen peptide prepared by the method disclosed by the invention has high F value and small relative molecular weight and is beneficial to be absorbed by the human body. The value of the collagen peptide is higher than that of common collagen peptide.

Provided is a preparation method for a high-F ratio oligopeptide, comprising the following steps: adding an alkaline protease to a yeast protein solution, and performing enzymolysis under conditions of pH 7.0-9.0 at 45 to 55 °C to obtain a yeast extract; concentrating the yeast extract to remove molecules having a molecular weight of 500 Da or less to obtain a concentrate; adding alpha-chymotrypsin to the concentrate, and performing enzymolysis under the conditions of pH 6.5-8.5 at 35 °C to 45 °C for 2 to 8 h; and inactivating enzymes, adding carboxypeptidase A to the enzymatic hydrolysate, performing enzymolysis under conditions of pH 6.5-7.5 at 35 °C to 45 °C for 4 to 8h, inactivating said enzyme, and using activated carbon to adsorb and remove impurities, so as to obtain the high F-ratio oligopeptide.

The invention discloses a method for preparing shellfish high F-value oligopeptides by a subcritical water-assisted enzymatic method, comprising the following steps: 1) subcritical water treatment: homogenate shellfish processing by-products and mix them with water, use subcritical water Extract with critical water and filter to obtain the extract; 2) Enzymolysis: Use endoprotease to enzymolyze the extract obtained in step 1), and then use exoprotease to enzymolyze to obtain enzymolysis; 3) Clarification: Remove the solid particles in the enzymatic hydrolysis solution obtained in step 2) to obtain a clarified enzymatic hydrolysis solution; 4) Decolorization: use activated carbon to decolorize the clarified enzymatic hydrolysis solution obtained in step 3) to obtain a decolorized enzymatic hydrolysis solution; 5) Refining: The decolorized enzymatic hydrolyzate obtained in step 4) is first subjected to ultrafiltration and then nanofiltration to obtain a high F value oligopeptide filtrate; and the high F value oligopeptide filtrate is dried. The invention effectively improves the F value of the product, greatly shortens the production time, reduces energy consumption, and reduces production costs.

The present invention discloses a preparation method of shellfish high F value oligopeptides. The preparation method comprises the following steps: shellfish meat is washed clean, the washed shellfishmeat is homogenized, then enzymatic hydrolysis is conducted to obtain an upper layer enzymatic hydrolysate, a dendrimer is used to prepare a molecular imprinting material, the molecular imprinting material adsorbs aromatic amino acids in the enzymatic hydrolysate to obtain a high F value oligopeptide solution, and high F value oligopeptide powder is prepared by freeze-drying. The raw materials ofthe product are liable to obtain and cheap, the preparation method is simple and convenient for industrial production, has a product yield of 75% or more, and the product has a F value of 50 or moreand can be used as a dietary source component for patients with liver diseases.

The invention discloses a double-telecentricity fixed-focus lens. A first single positive spherical lens, a second single positive spherical lens, a third single negative spherical lens, a fourth single negative spherical lens, a fifth single negative spherical lens, a sixth single positive spherical lens and a seventh single positive spherical lens are successively arranged from an end of a tested object; the second single positive spherical lens and the third single negative spherical lens are combined into a bonding lens; the fifth single negative spherical lens and the sixth single positive spherical lens are combined into a bonding lens; and a diaphragm is positioned between the third single negative spherical lens and the fourth single negative spherical lens. The double-telecentricity fixed-focus lens reduces quantity of the lenses, lowers the manufacture cost, and enables the structure to be simple, smaller in volume and lighter in weight on the premise that the lenses are few, Meanwhile, the double-telecentricity fixed-focus lens is small in total length of the lens, big in an F value and big in a maximum imaging surface.

The invention relates to a high-F (Fischer)-value tuna oligopeptide preparation method. The high-F-value tuna oligopeptide preparation method includes: soaking unfreezed minced tuna in a soak solution, taking the soaked minced tuna out, washing the soaked minced tuna clean by deionized water and homogenizing to obtain tuna paste; subjecting the tuna paste to enzymolysis, subjecting enzymatic hydrolysate to microfiltration, and performing chromatography circularly to obtain a high-F-value tuna oligopeptide solution. The high-F-value tuna oligopeptide preparation method has the advantages that the preparation method is simple, convenient for industrial production; the high-F-value tuna oligopeptide is capable of resisting fatigue and free from environmental pollution, thereby being particularly suitable for fatigue groups to consume and meeting environmental protection requirements; a preparation process is simple, technologies are simplified, product yield is increased to 75-88%, industrial production is facilitated, and an F value is as high as 25-35.

The invention provides a method for preparing high F ratio oligopeptide by virtue of ultrasonically destructed wheat protein. The method sequentially comprises the following steps: (1) preparing a wheat protein suspension according to a material-to-water ratio of 1: (8-13) by mass, and implementing ultrasonic destruction under a power of 220-250W for 8-2min; (2) adding 1.5-3.0% of papain by mass, uniformly mixing all materials, regulating pH value to 6.5-8.5, and preserving a constant-temperature condition of 35-55 DEG C for 120-60min; (3) adding 8-12% of carboraffin in terms of a total volume, regulating pH value to 6.0-7.5, implementing stirring at 40-50 DEG C, implementing decolorizing and debitterizing treatment for 4-3h, then implementing fine filtration, removing the carboraffin, and implementing sterilizing treatment, so that an oligopeptide fine filtrate is obtained; and (4) implementing drying. According to the method provided by the invention, the wheat protein is degraded by virtue of an ultrasonic destruction technique instead of alcalase and excision flavourzyme; therefore, the method is simple in process, low in cost and convenient for implementation of large-scale industrial production. The finished product (the high F ratio oligopeptide) prepared by the invention is applicable to biological medicines, food, health-care products, flavors and fragrances as well as animal feeds.

The invention relates to a method for summarizing case-related public opinion news texts based on case elements and BiGRU, and belongs to the technical field of natural language processing. The present invention first constructs a data set of public opinion news abstracts involved in the case and defines relevant case elements, then integrates the case element information into the word and sentence double-layer encoding process of the news text through the attention mechanism, and generates a news text representation with the case element information, and finally Sentences are classified using a multi-feature classification layer to obtain summaries. The invention realizes obtaining important information as a brief summary from the public opinion news text related to a specific case. It plays an important role for relevant personnel to quickly control the situation of public opinion.

The invention relates to a text sequence iterative method for semantic understanding. The text sequence iterative method for semantic understanding aims at solving the problems that in the prior art, a method for crawling searching of the engine retrieval number is adopted on the aspect of semantics similarity computation, the efficiency is low, recurrence cost is oversize, depending on an ontology base and a semantic resource, manual checking or purely manual construction is needed, the expandability aspect needs improving, and the practical application is limited to some extent. According to the technical scheme, the method comprises the steps that 1, an original text triad and a background knowledge base triad are extracted; 2, a real number vector of the original text triad and a real number vector of the background knowledge base triad are calculated; 3, the semantic similarity is calculated; 4, the weighted value of the real number vector of the background knowledge base triad is calculated; 5, a sequence iterative model is constructed; 6, text classification is conducted on a text through a support vector machine, and estimation is conducted on classification performance. The text sequence iterative method for semantic understanding is applied to computer fields.