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112 results about "Thinning skin" patented technology

Causes of thinning of the skin include: Aging is the most common cause of thin skin. Sunlight plays a significant role in thinning the skin over time. Smoking and drinking alcohol both speed up skin aging and can contribute to thinning of the skin over time. Steroid creams can make the cells in the epidermis smaller.

Method for extracting microcrystalline cellulose from sea squirts and preparing lyotropic cholesteric crystal

The invention relates to a method for extracting microcrystalline cellulose from sea squirts and preparing lyotropic cholesteric crystal, which comprises the steps of: soaking the sea squirts with distilled water, cleaning and only reserving tunics with thin skin scraped out; soaking the tunics with strong base for 6-24h to remove protein and lipid; subjecting the tunics in a buffering solution at 40-90 DEG C to reaction for 1-5h, and repeating the step 2-8 times; placing obtained cellulose on watch glass for drying; crushing to a micrometer or millimeter level; pouring into a beaker containing a proper amount of concentrated acid for hydrolysis, stirring to react for 30min-6h, and adding a large amount of distilled water again for terminating the reaction; and repeatedly centrifuging and dialyzing to remove acid in suspension so as to ensure that the solution outside a dialysis bag to be neutral or subacid finally, and then evaporating for concentration to obtain the lyotropic cholesteric crystal. The method has simple reaction processes, easier control of technological method, rich raw material resources, low cost, good repeatability, environmental protection, no toxicity and lower cost, is easier for mass production, and can be applied to industrial production.
Owner:QINGDAO UNIV OF SCI & TECH

Preparation method of polyvinyl alcohol composite nano-filtration membrane

The invention discloses a preparation method of a polyvinyl alcohol nano-filtration membrane. The preparation method comprises the following steps of: mixing ethanol and pure water according to a volume ratio of 1:1, adding a certain amount of 1,3,5-benzene tricarbonic acid and sodium dodecyl sulfate, and carrying out stirring for dissolution at a normal temperature to prepare a cross-linking agent solution; dissolving polyvinyl alcohol in pure water, carrying out heating and stirring at 95 DEG C for 1.5 hours to prepare an aqueous solution, and dropwise adding concentrated H2SO4 for later use; coating a predetermined amount of the cross-linking agent solution on a polysulfone base membrane by slit coating; and coating a predetermined amount of the polyvinyl alcohol aqueous solution on thesurface of the membrane by slit coating, and carrying out drying in an oven at a certain temperature to obtain a membrane, thereby forming an ultra-thin skin layer with a uniform thickness of 40-80 nanometers. According to the preparation method provided by the invention, the cross-linking agent with hydrophilic groups is selected to form a gradient cross-linked structure with gradually decreasing cross-linking degrees from bottom to top, so that the water flux can be greatly improved. Moreover, the wettability of the base membrane can be obviously improved, which is helpful for PVA to be uniformly and firmly attached to the base membrane.
Owner:ZHEJIANG UNIV OF TECH

Bud grafting method of precocity thin-skin walnut

The invention provides a bud grafting method of a precocity thin-skin walnut. The bud grafting method of the precocity thin-skin walnut comprises the following steps of (1) selecting a cut stem of a walnut seedling tree, and culturing 1-2 strong buds in the different directions for standby application after germination; (2) carrying out scion collection and preservation, wherein a developmental branch of the precocity thin-skin walnut is collected to serve as a scion in June or July of the current year, compound leaves and shoots need to be timely removed after the scion is picked, and a 1-2cm petiole is retained; (3) forming a grafting opening, wherein a rootstock notch is formed in the straight smooth portion of the lower half portion of a rootstock branch; (4) obtaining a bud tuber, wherein a bud tuber notch is formed in a full bud which is arranged on the lower half portion of the scion; (5) carrying out grafting, wherein the scion is embedded into the rootstock notch, and the bud tuber notch can be closely connected with the rootstock notch; (6) carrying out sealing on a connector, wherein a plastic strip is used for being tightly wound on the grafting portion from bottom to top, and the buds are exposed. The bud grafting method of the precocity thin-skin walnut can greatly short the breeding cycle, and improves correctness of variety breeding and breeding efficiency.
Owner:河南恒盈懿丰农牧有限公司

Thin skin milling device and method for milling by utilizing device

The invention relates to a thin skin milling device. The thin skin milling device comprises a vacuum platform, thin skin and a profiling compression clamp, wherein the thin skin is arranged on the vacuum platform, the profiling compression clamp is arranged on the thin skin, the surface area of the vacuum platform is larger than that of the profiling compression clamp, and the surface area of the profiling compression clamp is larger than that of the thin skin; the profiling compression clamp is a rectangular thick aluminum plate, cutting troughs matched with the outer contour of the thin skin are formed in the periphery, close to the edge, of a surface plane of the thick aluminum plate, sunken milling regions matched with sunken regions of the thin skin are formed in the surface of the thick aluminum plate, an outer contour compression region is arranged at the region, outside of the cutting troughs, on the profiling compression clamp, and an interior compression region is arranged at the region, inside the cutting troughs, on the profiling compression clamp. By milling the skin by virtue of the thin skin milling device, the phenomenon that skin is scrapped due to the overcutting as the skin is intermittently desorbed from the vacuum platform and looses and shakes in a milling process can be effectively avoided.
Owner:AVIC SAC COMML AIRCRAFT

Storage method for preventing dried Xinjiang Wen 185 thin-skin walnut from rancidity

InactiveCN103815013ARational storage processHighlight significant technical effectsSeed preservation by freezing/coolingTechnological researchThinning skin
The invention discloses a storage method for preventing a dried Xinjiang Wen 185 thin-skin walnut from rancidity. Research that temperature, relative humidity and gas components are key technical factors influencing the storage quality of the thin-skin walnut is started, the controllability of production operation of the Xinjiang thin-skin walnut is considered, and the storage temperature and the gas components are researched on the premise of certain relative humidity, so that the key problems of oxidative rancidity such as flavor change, color and lustre browning and nutritional quality reduction during the storage period of the Xinjiang thin-skin walnut are regulated and controlled; the storage temperature is controlled to be 4.5-5.5 DEG C under the relative humidity of 50-60%; a 100% carbon dioxide packaging environment is adopted; the technical research of a storage period quality regulation and control technique is developed; a reasonable storage technological process and a basic technological parameter are determined; the storage method for preventing the dried Xinjiang Wen 185 thin-skin walnut from the rancidity is provided; a good technical effect is achieved; and the storage method has an important actual development value.
Owner:XINJIANG AGRI UNIV
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