35results about How to "Achieve high-value conversion" patented technology

The invention discloses a method for preparing biodiesel by directly using cellulose through mixed fermentation. The mixed fermentation is performed by using a plant fiber degrading strain and a grease producing strain, and ethanol is produced by directly using natural plant fiber such as straws. The method comprises the following steps of: designing a culture medium for the mixed fermentation by optimization methods such as a response surface method, and optimizing to obtain the fermentation conditions such as the optimum temperature of mixed fermentation, optimum mixing proportion of strains and optimum mixing time of the strains by utilizing the methods such as orthogonal test and response surface methodology; according to the optimized fermentation conditions, by using the plant fiber as a carbon source, degrading the cellulose into fermentable sugar by using a cellulase producing strain, and adding grease-producing microorganisms into the culture system for the mixed fermentation; and by using the sugar which is produced by the constant enzymolysis of the plant fiber as the carbon source, fermenting to produce grease by using the grease producing strain, and performing methyl esterification reaction of the microbial grease to obtain the biodiesel.

The invention discloses a preparation method of a mulberry twig bark fiber/silk fibroin multilayer composite membrane. The preparation method includes the steps of: 1) initial separation of mulberry twig bark fibers; 2) identification of content and purity of the mulberry twig bark fibers; 3) modification of the mulberry twig bark fibers; 4) grafting of the mulberry twig bark fibers; 5) productionof single-layer membranes; and 6) production of the multilayer membrane. The multilayer composite membrane not only solves a problem of single physical mixing during preparation of composite membranes in the prior art, has good water absorption and moisture retention effect, has good thermostability, is reduced in crystallization degree, and is improved in mechanical properties.

The invention discloses a selenium and nitrogen co-doped biochar catalytic material as well as a preparation method and application thereof. High-toxicity selenite is reduced into low-toxicity biological nano-selenium under the biological detoxification action of bacteria (Bacillus megaterium B10 with the preservation number of CGMCC No.15753), then selenium-enriched thalli serve as a carbon source of biochar, a nitrogen source is added, and the novel selenium and nitrogen co-doped biochar catalytic material is prepared with a simple one-step carbonization method. The preparation method of theselenium and nitrogen co-doped biochar provided by the invention is simple, convenient, safe, cheap and easy to control, and can be used for large-scale production. Meanwhile, the reduction effect ofbacteria on high-valence selenium can rapidly achieve detoxification of selenite pollutants, the environment-friendly advantage is achieved, in addition, the biochar can effectively degrade refractory organic matter or pollutants by activating monopersulfate, the removal effect is good, the reaction speed is high, and the application prospect in the field of wastewater remediation is very wide.

The invention discloses a method for extraction of mulberry pectin via coupling of N-methyl morpholine oxide and cellulose, which comprises the following steps of: (1) processing mulberry barks with the N-methyl morpholine oxide: using the mulberry barks as raw materials, processing the mulberry barks with the N-methyl morpholine oxide for equal-component separation of pectin and cellulose in the mulberry barks, adding water after processing, so that the pectin is dissolved in water and the cellulose, hemicellulose, lignin and other components are precipitated; (2) processing the cellulase: taking the supernatant liquid, adding the cellulase for processing, and removing cellulose impurities; and (3) preparing the pectin: bleaching the supernatant liquid, adding ethyl alcohol for precipitation of the pectin, washing with absolute ethyl alcohol, and drying and grounding into powder to obtain the mulberry pectin. The N-methyl morpholine oxide is used as a processing agent to extract the pectin in the mulberry barks, the pectin can be extracted efficiently, only 20-50min is needed for processing with the NMMO (N-methyl morpholine oxide), the final yield of pectin can reach 11 percent, and the efficiency of extraction of the pectin from the mulberry barks can be increased.

The invention discloses a preparation method of mulberry protein active peptide. The method comprises the following steps that mulberry leaves and mulberry bark are washed, dried and smashed, a treating agent prepared from magnetic graphene oxide, dilute acid and hydrogen peroxide is added for digestion, the magnetic graphene oxide is recycled through a magnet, the pH value is adjusted to be 4.5-5.5, precipitate is obtained through centrifugation, water is added into the precipitate for dissolving and filtration, filtrate contains mulberry protein solution, heating treatment is carried out, cooling is carried out, the pH value is adjusted to be 7-8.5, protease is added for heat preservation, the product is placed in an ultrasonic field for ultrasonic assisted enzymolysis, high-temperature heating is carried out for inactivating enzyme, centrifugation is carried out, supernate is collected, decoloring, suction filtration, ultrafiltration, dialysis, ion exchange and concentration are carried out, and the mulberry active peptide is obtained. Mulberry leaves and mulberry bark are adopted as raw materials for preparing the active peptide, and the raw materials are agricultural waste, are low in cost and are of great significance in environmental protection and waste resource utilization. The mulberry protein extraction content and mulberry protein active peptide conversion efficiency are higher compared with a conventional method, and physical and chemical property is stable.

The invention discloses a method for extracting DNJ (1-deoxynojirimycin) in mulberry leaves through hydrothermal acid control alcohol extraction, and belongs to the technical field of extraction of active ingredients in natural products. According to the method, mulberry leaves are used as raw materials, and DNJ is obtained through three steps of raw material pretreatment, synchronous treatment of the mulberry leaves through hydrothermal acid catalysis and preparation of a DNJ (1-deoxynojirimycin) product. And a theoretical basis is provided for mulberry leaf medicinal resource development. The method can be widely applied to extraction of DNJ in mulberry leaves, can also be used for extraction of high-value natural products in biomass, and has important practical significance on improvement of the utilization value of mulberry leaves.

The invention relates to lycium ruthenicum extract with a liver protection function and evaluation of an inhibition effect of the lycium ruthenicum extract to non-alcoholic fatty liver and belongs to the field of biomedicines. A main raw material is natural food-borne lycium ruthenicum; a preparation method comprises: weighing the lycium ruthenicum; extracting the lycium ruthenicum with ethanol with the concentration of 50 percent to 70 percent according to the material-liquid ratio ranging from (1 to 1) to (1 to 20), wherein the extracting temperature is 30 DEG C to 100 DEG C and the extracting time is more than 15 minutes; after filtering, taking filtrate and repeating for 1 to 5 times; combining the obtained filtrate and concentrating at low temperature and in vacuum to obtain the extract. Mice which are fed by high fat are fed with the extract by gavage and an inhibition effect on the non-alcoholic fatty liver is evaluated; the extract can obviously inhibit the non-alcoholic fatty liver caused by high fat diet and complicated metabolic diseases is proved; the lycium ruthenicum extract has a remarkable liver function protection effect.

The invention discloses an application of a lotus leaf alcohol extract in preparation of a drug for inhibiting cancer metastasis and belongs to the technical field of biomedicine. Mice suffering frommetastatic cancer are used as experimental subjects, compared with a control group fed with normal feed, the mice which suffer from the metastatic cancer and are fed with feed containing the lotus leaf alcohol extract have obviously reduced weight and have the lung metastasis number reduced by about 45% and the total tumor weight at the metastasis part reduced by about 50%. The fact that the lotusleaf alcohol extract can be used for effectively inhibiting cancer metastasis is put forward for the first time, so that a new way is opened up for treatment of metastatic tumor, great significance is made in the development of edible and medicinal dual-purpose resources, high-value conversion of active plant resources is realized, and deep processing and utilization of agricultural products is promoted.

The invention belongs to the technical field of biomass resource utilization and electrode material preparation, and relates to a method for preparing a carbon-based transition metal sulfide compositeelectrode material based on pyrolysis bio-oil. The method comprises the following steps: firstly, dissolving nickel sulfate or cobalt sulfate into an alcohol/water solution to prepare a bio-oil absorption solution, capturing bio-oil generated by biomass pyrolysis by using the absorption liquid, drying the absorption liquid after the pyrolysis reaction is finished, calcining the absorption liquidin a reducing atmosphere, and cooling the absorption liquid to room temperature to obtain the composite electrode material. According to the invention, bio-oil generated by biomass pyrolysis is used as a raw material, and the prepared composite electrode material has excellent supercapacitor performance: under the current density of 1 A/g, the specific capacitance of the composite electrode material is as high as 1000 F/g or above. Besides, the biomass raw material is low in price, green and sustainable, the preparation process is simple, and a new way and idea are provided for biomass resource high-value conversion and preparation of the carbon-based transition metal sulfide composite electrode material.