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162 results about "Periodic acid" patented technology

Periodic acid (/ˌpɜːraɪˈɒdɪk/ "per-i-OH-dic") is the highest oxoacid of iodine, in which the iodine exists in oxidation state VII. Like all periodates it can exist in two forms: orthoperiodic acid, with the chemical formula H₅IO₆ and metaperiodic acid, which has the formula HIO₄.

Method for preparing modified polysaccharides tanning agent

The invention discloses a method of preparing a modified polysaccharide tanning agent, and is characterized that polysaccharide which is 5 to 10 parts by weight and water which is 2 to 20 parts by weight are activated for 5 to 30 minutes through ultrasonic the power or which is 1000W, are filtered and dried to obtain activated polysaccharide the accessibility of which is increased; the activated polysaccharide which is 5 to 10 parts by weight, water which is 2 to 20 parts by weight, sodium hypochlorite which is 10 to 200 parts by weight, and sulfuric acid which is 1 to 10 parts by weight are evenly mixed and react for 2 to 6 hours under the temperature ranging from 30 to 60 DEG C; then sodium hydroxide which is 5 to 100 parts by weight is added in, and the mixed solution is evenly stirred, filtered and washed; then water which is 2 to 20 parts and periodic acid which is 5 to 10 parts are added, and an electric reaction is performed for 2 to 6 hours under the separation of a cationic membrane, wherein, the pressure is 5 to 10V, and the current is 25 to 50mA, the mixed solution is filtered, washed, and dried to obtain the modified polysaccharide tanning agent with aldehyde groups and carboxyl groups. In leather pale yellow which is tanned by the modified polysaccharide tanning agent, the grain tightness is smooth, the contraction temperature ranges from 80 to 85 DEG C, and the content of aldehydes in leathers are less than 40mg/kg in accordance with national standards.
Owner:SICHUAN UNIV

Method for preparing modified starch tanning agent

The invention discloses a method for preparing a modified starch tanning agent, comprising the following steps of: firstly, degrading corn starch; in the presence of HRP (Horse Radish Peroxidase)/ hydrogen peroxide (H2O2), grafting and modifying the degraded starch with sulfanilic acid, gallic acid and nekal; and then oxidizing the grafted starch with periodic acid. The invention has the innovation points that a nekal structure unit is introduced in the starch structure so as to improve the permeation wetting function of the modified starch tanning agent; the gallic acid structure unit is introduced to improve the tanning properties of the modified starch tanning agent, the sulfanilic acid is introduced to increase the dispersivity of the modified starch tanning agent, and dialdehyde action is used for improving the tanning properties of the modified starch tanning agent. The preparation method of the invention is peculiar and practical, and the obtained tanning agent is an environmentally-friendly leather tanning agent and is suitable for primary tanning and retanning. The shrinkage temperature (Ts) of pickled leather after primary tanning can be improved to 75-80 DEG C; and the retanned product has the advantages of wash resistance, high absorption rate on dyes and fatting agents and the like, is soft and plump.
Owner:SHAANXI UNIV OF SCI & TECH

Preparation and application of miniature high-efficiency clenbuterol immuno-affinity chromatography column

The invention relates to a preparation method and application of a miniature high-efficiency clenbuterol immuno-affinity chromatography column. The technical scheme is characterized by comprising the following steps of: preparing a high-quality antibody, synthesizing efficient prepared bromoacetyl chloride clenbuterol purified by a liquid chromatogram and thiolation hemocyanin into immunogen immune animals, and obtaining antiserum; reacting the purified bromoacetyl chloride clenbuterol with thiolation agarose to obtain clenbuterol-agarose padding, loading the padding into an antigen affinity chromatography column; and purifying a clenbuterol specific antibody in the antiserum by using the antigen affinity chromatography column. The preparation method of the clenbuterol immuno affinity chromatography column comprises the following steps of: coupling high-quality antibodies at high density to the agarose oxidized by periodic acid to prepare an antibody affinity padding, and placing 25 mul of padding in a small specially-made column to prepare the miniature immuno-affinity chromatography column. The immuno-affinity chromatography column provided by the invention can be used for specifically gathering clenbuterol in a sample to be tested at high efficiency and can increase the accuracy, reliability and sensitiveness of detection when being combined with an analytic instrument and colloidal gold test paper for use.
Owner:NANNING LANGUANG BLUE LIGHT BIOTECH

Improved periodic acid Schiff reaction rapid staining kit

InactiveCN102243226AAvoid the disadvantages of fast color development but no fungus color developmentAvoid the disadvantages of not being able to develop colorBiological testingBiological stainPeriodic Acid-Schiff Reaction
The invention relates to an improved periodic acid Schiff (PAS) rapid staining kit. The kit comprises: a staining liquid, shedding-proof films, and cover slips. The staining liquid is a mixture of active fuchsine liquid and active fast green liquid, which is diluted with 95% of ethanol and 0.5% of sodium binitrite solution. The kit is advantaged in that: fuchsine and fast green are firstly prepared into a rapid biological rapid staining liquid; the staining process is fast, wherein the staining process takes 10 seconds; the detection process is simple, wherein a result can be observed directly, and washing is not required; the application scope is wide, wherein the kit can be used for staining various clinic specimens such as scurf, mucous and vaginal secretion. Periodic acid is attached on object slides, such that packing materials of the product is saved, and the operation process is simplified. The kit is especially suitable for a large clinic specimen amount. Because periodic acid, which is a flammable and combustible product, is attached to the object slides, periodic acid turns from liquid into a dried status. Therefore, danger of periodic acid is greatly reduced, and a standardized operation is easy to achieve. Poor repeatability due to personal operation errors can be avoided.
Owner:北京世济合力生物科技有限公司
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