9 results about "Pith" patented technology

The invention relates to the technical field of adsorbents, and discloses a preparation method and application of a sunflower stem pith foam adsorption material.The preparation method comprises the steps that microfibrillated cellulose, quaternized chitosan and sunflower stem pith powder are put into a beaker to be mixed, a cross-linking agent is added, and stirring cross-linking is conducted; and then cryopreserving and thawing to prepare the composite sunflower stem pith foam adsorption material with the dispersed sunflower stem pith powder wrapped by the chitosan. Chitosan is used as a support to support and disperse sunflower stem pith powder, so that sunflower stem pith agglomeration is avoided, and active adsorption sites are increased. The adsorption capacity of the sunflower stem pith foam adsorption material prepared by the method is greatly increased, the adsorption capacity of Congo red is 9 times that of uncompounded sunflower stem pith, the performance is greatly improved, and the sunflower stem pith foam adsorption material can be applied to adsorption of hydrophobic and anionic azo dyes and has a good application prospect. The adsorbent has the advantages of low cost, simplicity in preparation, no chemical pollution, reproducibility, excellent adsorption performance and the like.

The invention relates to the technical field of biomass resource utilization and medical biological materials, in particular to a method for preparing a hemostatic sponge based on sunflower stem pith and application of the hemostatic sponge. The hemostatic sponge is prepared from sunflower stem pith fragments and an adhesive through a deconstruction-recombination technology and meets the requirements of isotropic liquid absorption, non-isotropic liquid absorption and non-isotropic liquid absorption; the difference between the axial blood suction rate and the radial blood suction rate is smaller than or equal to 10%, the shape memory recovery rate within 30 seconds after blood suction is larger than or equal to 85%, and the blood coagulation time is 60-100 seconds. According to the sunflower stem pith-based hemostatic sponge, sunflower byproducts serve as raw materials, the water absorption capacity and the hemostatic efficiency of the sponge are improved by means of the hydrophilicity and the procoagulant characteristic of the sunflower byproducts, and the raw material cost is reduced by 90% or above compared with that of existing synthetic sponge; the sunflower stem pith-based hemostatic sponge is constructed based on deconstruction and structural recombination, the limitation of a natural sunflower stem pith anisotropic microstructure is improved, the sponge has isotropic liquid absorption, the difference between axial and radial blood absorption rates is smaller than or equal to 10%, the sponge has shape memory ability, the sponge is compressed to 50% of the original volume after blood absorption, and the recovery rate is larger than or equal to 85% within 30 s.

The utility model relates to the technical field of tetrapanax papyriferus processing equipment, in particular to a modularized automatic coring device for tetrapanax papyriferus, which comprises a feeding mechanism, a section cutting mechanism, a feeding mechanism and a coring mechanism. The tetrapanax papyriferus stem cutting machine is reasonable and compact in structure, the feeding mechanism can automatically arrange tetrapanax papyriferus stems in order and continuously convey the whole tetrapanax papyriferus stems to the belt conveyor one by one, the shape righting mechanism can straighten bent tetrapanax papyriferus, the section cutting mechanism can automatically cut the whole tetrapanax papyriferus stems into a plurality of sections according to the set length, and the cutting efficiency is improved. The cut tetrapanax papyriferus stem sections can enter the feeding mechanism along the guide plate and are conveyed to the clamping assembly to be clamped, and finally tetrapanax papyriferus cores are jacked out of the tetrapanax papyriferus stem sections through the core taking mechanism. In the process, manual cutting is not needed, the degree of dependence on manpower can be greatly reduced, potential safety hazards are avoided, the ricepaperplant pith coring operation efficiency is high, the labor intensity of operators is reduced, all procedures can be automatically linked, and ricepaperplant pith coring operation can be continuously carried out.

The invention discloses a pentacyclic triterpenoid compound as well as a preparation method and application thereof.The pentacyclic triterpenoid compound is a compound shown in a formula A and a formula B. The pentacyclic triterpenoid compound is extracted from peeled and demarinated stems of Tibetan medicine rubus corchorifolius. The pentacyclic triterpenoid compound has anti-inflammatory activity and anti-tumor activity; the compound has the potential of being developed into anti-inflammatory drugs and anti-tumor drugs.

A concrete composition based on binder, sand, gravel, water, and an elongated plant aggregate is described, where the binder comprises cement and the concrete composition, based on parts by weight per part cement, comprises 0.2 – 0.7 parts water, 1.8 - 3.0 parts sand, and 2.5 – 5.0 parts gravel and / or aggregate, and the elongated plant aggregate is selected from cut stem sections of grasses, hemp, Jerusalem artichoke, or flax or palm plumes and mixtures thereof, and where the elongated plant aggregate is formed by plant stem sections with a length of 10 – 80 mm which naturally comprise a hard, substantially dimensionally stable bark and a compressible pith, of which the natural volume of the pith is greater than the natural volume of the bark, from which pith has been removed, where the volume of the pith after removal is less than the volume of bark.

The application relates to a high-efficiency grafting method for shortening the breeding cycle of Pinus pumila, and relates to a Pinus pumila grafting method.The application aims to solve the problem of low grafting survival rate of the existing Pinus pumila grafting method.A high-efficiency grafting method for shortening the breeding cycle of Pinus pumila: I. treatment before grafting of a rootstock;II. selection of a Pinus pumila mother tree;III. collection and treatment of a scion;IV. grafting in the middle and late May in a way of pith cambium grafting;V. management after grafting.The advantages are that the survival rate of Pinus pumila is greatly improved, the breeding cycle is greatly shortened, high-quality germplasm resources are effectively preserved, and the genetic gain of Pinus pumila is obviously improved.The application is mainly used for Pinus pumila grafting.

The application relates to a method for cultivating insect-resistant transgenic poplar trees. In order to solve the problem of poor insecticidal effect caused by uneven expression or unreasonable distribution of toxic proteins of the transgenic poplar plants, the application optimizes infection conditions and a vector system, introduces a plant genome on the main stem of a naturally grown poplar seedling, and the genetic stability of the transgenic plant, the target gene can be stably inherited and expressed in the offspring plants, and the transformation efficiency is high. The content of the toxic proteins in the cortex, phloem, xylem and pith of the transgenic plants obtained by the method is obviously increased, the content of the toxic proteins in the cortex is the highest, the content of the toxic proteins in the phloem, xylem and pith is uniform, and the transgenic plants have good insecticidal effect or good effect of inhibiting the development of larvae. Moreover, the content of the toxic proteins in the transgenic plants can be maintained stable for a long time in the plant, and the content of the toxic proteins changes by not more than 4% between April and the top sealing period.

The utility model relates to the technical field of ricepaperplant pith coring, and discloses an efficient ricepaperplant pith coring device which comprises a rack, an efficient coring mechanism is arranged in the rack, and the efficient coring mechanism comprises an electric conveying belt, a feeding hopper and an electric telescopic rod. According to the efficient ricepaperplant pith coring device, by arranging the key controller, the electric conveying belt can be controlled to periodically advance step by step, the stepping motor can be controlled to rotate step by step, the electric telescopic rod can be controlled to be electrified to stretch out and draw back, and the air cylinder can be controlled to stretch out and draw back; furthermore, the equal-length tetrapanax papyriferus rhizomes placed in the feeding hopper can fall on a certain group of first lower clamps or second lower clamps one by one along with the rotation of the feeding groove column, so that a plurality of rhizomes move to the lower part of the pressing plate one by one along with the stepping of the electric conveying belt; the electric telescopic rod is electrified to extend so that the upper clamp, the second back-jacking spring and the upper jacking block can be matched with the first lower clamp, the lower jacking block and the first back-jacking spring or the second lower clamp, the lower jacking block and the first back-jacking spring to clamp rhizomes one by one.

A growth medium for replacement of Sphagnum suitable for acid soil plants, as litter for chickens and as ground cover. A method to prepare such a growth comprises after harvest of a cellulosic plant material, a separation of the cellulose from pith material of the plant, a disinfection and an enrichment of the separated cellulosic material. Suitable plant material contains fiber with a high cellulose-content larger than 50weight%, where content of crystalline cellulose must be above 54%.