326 results about "Iodine solutions" patented technology

Authenticatable paper and paperboard products are prepared by printing images such as microdots on one or both surfaces of the paper using a starch containing authenticating solution. The images are not detectable by the human eye, but can be revealed with the application of a standard iodine solution.

The invention provides a method for leaching gold from a deserted printed circuit board. The method comprises the specified steps: Step 1: the deserted printed circuit board is crushed and smashed to separate metals and plastics; Step 2: the metals obtained from the Step 1 are mixed with nitric acid solution, stirring and reaction are carried out for 1h to 6h at the constant temperature of 10 DEG C to 80 DEG C, products are filtered, copper is leached from the filtrate, and the filter residue is washed and dried; Step 3: the filter residue obtained from the Step 2 is added into the blended solution of first iodine solution and a pro-oxidant, a reaction pH value is controlled at 3 to 9 by an inorganic acid and alkaline solution, reaction is carried out for 2h to 5h in a constant temperature oscillator at the temperature of 10 DEG C to 60 DEG C; and Step 4: products obtained from the Step 3 are filtered, with the filtrate fed into the cathode region of an electrobath, second iodine solution composed of iodine, water-soluble iodide and water is used as the electrolyte and fed into the anode region of the electrobath, electrolysis is carried out, the solution at the cathode region is filtered, then the filter residue obtained is gold mud, and the second iodine solution at the anode region is recovered. The method has high gold leaching ratio, low cost and less environmental pollution.

The invention relates to a method for preparing an antibacterial film of a quaternarized chitosan iodine complex. The method comprises the following steps: inserting quaternary ammonium salt on the hydroxyl group or amino group of a chitosan structure unit to prepare a quaternarized chitosan derivative; soaking a blend film of the quaternarized chitosan derivative and gelatin or poval into a simple substance iodine solution for 4-6 hours to obtain the antibacterial film of the quaternarized chitosan/gelatin or poval iodine complex, or directly preparing a quaternary ammonium salt chitosan iodine complex from the quaternarized chitosan derivative and simple substance iodine, and then mixing the quaternary ammonium salt chitosan iodine complex with gelatin or poval to prepare the blend antibacterial film containing iodine. By using the method, the water solubility and the biological activity of chitosan can be improved; simple substance iodine is stabilized and complexed by utilizing the affinity of a quaternary ammonium salt group and an iodine molecule; according to the different positions of a human body, the prepared antibacterial film can be compounded with other materials; a chitosan base has hemostasis, antiphlogosis and tissue repair functions on human body wound, can reduce the stimulation of iodine on the wound and controls the release of iodine, and the double effects of the chitosan base and iodine provide an ideal curing environment for a wound surface.

The polarizer of invention comprises a zinc-containing polyvinyl alcohol-based film which has been subjected at least to dyeing with an iodine solution containing iodine and potassium iodide, wherein the polarizer has a value of zinc content (% by weight)/potassium content (% by weight) of from 0.05 to 0.4, and a potassium content of from 0.2 to 12% by weight, and a value of zinc content (% by weight)/iodine content (% by weight) of from 0.012 to less than 0.05, and an iodine content of from 1 to 20% by weight. The polarizer can achieve high resistance to humidity.

The invention discloses gynecologic gel with antibacterial restoration activity and a preparation method thereof. The gynecologic gel is polyamino polysaccharide polypeptide complex iodine compound bioactive glass gel which is formed by taking a chitosan iodine solution and a bioactive glass as main active components, carbomer and sodium alginate as adhesives and gelatin as a shaping agent and has an antibacterial restoration function, wherein the chitosan iodine can not only kill pathogen by providing free iodine, but also promote the healing of a wound tissue part, the bioactive glass is permeated through the soakage of a human body fluid, and the surface activity of the bioactive glass can promote the generation of a growth factor positioned on the wound tissue part and promote cell proliferation after contacting with a wound tissue. The gynecologic gel disclosed by the invention can not only kill the pathogen by providing the free iodine, but also promote the healing of the wound tissue part, has good biocompatibility and is plastic gel which can be used for treating gynecological inflammation and has antibacterial restoration activity. The preparation method disclosed by the invention is simple, convenient and suitable for industrialized production.

Contaminants are filtered from a fluid flow stream and the filter is regenerated by a process including steps of:

• • providing a filter material comprising both carbon and potassium iodide;
  • passing a contaminated fluid stream in contact with the filter material;
  • adsorbing contaminants from the fluid stream onto surfaces in the filter material;
  • passing an electric current through the filter material with adsorbed contaminant thereon;
  • disassociating contaminant from the surfaces of the filter material; and
  • removing disassociated contaminant from the filter material by carrying away the disassociated contaminant in a fluid flow mass.

Separately, a stable, active iodine solution is also provided for numerous deodorizing and disinfecting applications.

The invention discloses a method for preparing a chitosan-based antibacterial membrane material. The method comprises the following steps of: dissolving chitosan into a diluted acid solution with a certain concentration; adding a polyvinylpyrrolidone iodine solution to agitate at a room temperature to react for more than 2.5 hours; after centrifuging and separating an agitated solution, taking liquid supernatant to pave a membrane; and drying at 40 DEG C to obtain a chitosan-based antibacterial membrane. The prepared chitosan-based antibacterial membrane material has the antibacterial activity which is more durable and effective, improves the stability of effective iodine and has good iodine slow-releasing performance and mechanical property. The novel antibacterial membrane material disclosed by the invention can be used for medical surgical dressings, the antibacterial membrane material and the like to have a wide application prospect in the fields including foods, medicines, textile industry and the like.

The invention relates to a solid phase synthetic method of plecanatide. The method comprises the following steps: splitting off polypeptide from resin by using a TFA (trans fatty acid) splitting agentto obtain Acm-protected free peptides at sites 2 and 10, wherein another pair of thiols of (5, 13 sites) Cys is exposed; under an alkaline condition, oxidizing the pair of thiols by using 30 percentof hydrogen peroxide/hydrogen peroxide of which the volume of a reaction solution is 0.5ml/g to 1ml/g so as to obtain monocyclic plecanatide with a pair of 5-13 disulfide bonds. The formation of the rest pair of disulfide bonds comprises the following steps: slowly dripping an iodine solution with certain concentration into a solution under an acidic condition; carrying out reaction for 3 hours; forming the pair of 2-10 disulfide bonds while Acm removal is carried out at the same time; adding ascorbic acid after the reaction is ended, and then removing an excessive amount of iodine; filtering,purifying and freeze-drying the reaction solution to obtain the powdery plecanatide. According to the application, a cyclizing route and conditions are optimized, accurate positioning can be achievedwhile the yield is ensured at the same time, the steps are simple, a cyclization process is controllable in real time, and final products are not needed to wait for confirming right or wrong, so thatthe efficiency is effectively improved.

The invention discloses a polyweitone iodine solution gel wound dressing and dressing making method, which comprises the following parts: 1-10% polyweitone iodine, 10-30% crosslinking hydrophilic polymer, 1-5% irradiation sensitizer, 1-5% plasticizer and water, wherein the pH value of the solution is maintained within 6-8. The making method comprises the following steps: blending gel material and water evenly; extracting into vacuum to debubble; freezing; solidifying; moulding; selecting the irradiation dose at 10-100kGy to crosslink irradiated by 60Co gamma-ray or electronic beam. The invention is fit for healing the burnt, superficial ulcer, superficial injury due to trauma and surgery, which antibioses and lessens pain to accelerate the healing of wound and reduce the formation of scar.

The invention relates to the technical field of medical detection and discloses a method and a kit for detecting amylase. The method for detecting the amylase provided by the invention comprises the following steps of: in a buffer solution with a pH value of 7.2, mixing a sample to be detected and soluble starch to obtain a mixed solution; mixing potassium iodide and acidic potassium iodate and mixing the mixture of the potassium iodide and the acidic potassium iodate with the obtained mixed solution; detecting absorbance in a 630nm wavelength; and calculating the concentration of the amylase in the sample to be detected according to the absorbance of a non-enzymatic blank tube which is subjected to the same treatment. In the method, the potassium iodide and the potassium iodate generate iodine under the acidic condition, and the iodine is combined with the unreacted starch to form a blue compound, so influence on reaction color development due to reduction of components caused by easiness in sublimation and volatilization of an iodine solution which is directly used is avoided, and the accuracy of a detection result is improved. The kit is good in stability, long in preservation time, wide in application range and convenient for popularization and can be applied to determination of the content of the amylase in serum or urine by hospitals, health departments and medical biological scientific research institutes at all levels.

A method for patterning a light transmitting electrically conductive member uses a light transmitting laminate material in which an electrically conductive layer including an overcoat layer and silver nanowires embedded therein is formed on a surface of a light transmitting base film and includes a step of treating a surface of the electrically conductive layer which is not covered with a resist layer using an iodine solution to at least partially iodize the silver nanowires and a step of applying a thiosulfate solution to the surface of the electrically conductive layer which is not covered with the resist layer to remove a silver iodide exposed to a surface of the overcoat layer. Since a white cloudy or a whitened silver iodide is removed, the optical transmission characteristics of the non-electrically conductive region can be improved.

The invention discloses a method for preparing iodopropargyl n-butyl carbamate, which comprises the following steps: a mode 1 reaction kettle, a mode 2 reaction kettle, a mode 3 reaction kettle, a mode 4 reaction kettle and a mode 5 reaction kettle are connected in series, wherein, projecting discs are arranged in the mode 3 reaction kettle and the mode 5 reaction kettle; return tubes and liquid stirrers are arranged in the mode 2 reaction kettle and the mode 4 reaction kettle; the mixed liquid composed of iodine solution and propargyl n-butyl carbamate is continuously charged into the projecting disc of the mode 5 reaction kettle, reaction liquid flows from the bottom of the mode 5 reaction kettle into the mode 4 reaction kettle continuously and flows from the return tube of the mode 4 reaction kettle into the projecting disc of the mode 3 reaction kettle continuously, and chloros water solution is continuously charged into the projecting disc of the mode 3 reaction kettle at the same time; the reaction liquid flows from the bottom of the mode 3 reaction kettle into the mode 2 reaction kettle continuously, and the return tube of the mode 2 reaction kettle into the mode 1 reaction kettle continuously; iodopropargyl n-butyl carbamate, the purity quotient of which is more than 99.0 percent, is obtained through washing, filtering and drying after the solvent is removed from the reaction liquid under the vacuum condition in the mode 1 reaction kettle. The product obtained by adopting the method has high purity quotient, large industrialization production is easy to be realized, the secondary reaction can be effectively reduced, and the utility ratio of iodine can be increased.

The invention relates to a preparation method of glucan embolism microspheres with a CT (computed tomography) visualization function. The preparation method is characterized by comprising the steps of dissolving polymethyl vinyl ether maleic anhydride grafted with beta-CD and modified glucan in water; uniformly stirring and then dropwise adding the solution into dimethyl silicone oil, wherein the volume ratio of a water phase to an oil phase is 1:5; under the condition of magnetic stirring, heating to 60-120 DEG C to react for 16-48 hours; after the reaction, standing and then removing supernatant fluid; cleaning microspheres deposited at the bottom of a container by using n-hexane; removing the remaining dimethyl silicone oil; and performing vacuum drying to remove the n-hexane on the surface to obtain gel microspheres with the particle size of 30+/-5 microns and good dimensional homogeneity. The gel microspheres are added into a developer iodine solution or iodized oil, and the microspheres are discovered to have an obvious gray level through micro-CT observation.

The invention discloses an artificial half-salt water ecological breeding method of enteromorpha. The method comprises the following steps: (1) preparing an artificial half-salt water culture solution for later use; (2) cleaning yellow green enteromorpha for several times, sucking dry the surface moisture, and semi-drying a drying box in which samples are positioned in the shade; (3) disinfecting enteromorpha samples semi-dried in the shade in artificial salt water containing an iodine solution for several minutes, after sheared algae section treatment, putting the samples into a culture vessel containing the artificial half-salt water culture solution and an attaching substrate, and sealing by using a preservative film; (4) culturing in an illumination incubator; (5) introducing zooplanktons and adding food yeasts after divergent enteromorpha spores or gametes are fully attached to the attaching substrate, so as to form an ecological breeding system in the culture vessel. The artificial half-salt water ecological breeding method of enteromorpha disclosed by the invention is easy to operate, has the advantages of readily available raw materials, low price, low cost and extensive culture and is particularly suitable for enteromorpha-related researches in inland areas or labs.

The invention relates to a method for analyzing arsenic in an ore sample, comprising the following steps of: adding nitric acid and potassium chlorate in a certain amount of sample; adding sulphuric acid heating, dissolving and evaporating until sulfur trioxide smother smokes for a few minutes, cooling and adding water and blowing and washing; heating and dissolving; adding copper sulfate and hydrochloric acid; then adding sodium hypophosphite until the yellow of Fe3<+> completely fades; excessively adding and boiling under the reducing acidity and keeping for a certain micro boiling time to enable the arsenic to settle and agglomerate; settling and filtering the arsenic; washing a beaker and the sedimentation by using a hydrochloric acid solution containing sodium hypophosphite; washing the beaker and the sedimentation by using an ammonium chloride solution until the pH value is 5; transferring a degreasing cotton wool to an original beaker; adding a buffer solution and a starch solution into the beaker; accurately adding an iodine standard liquid; and dropping a sodium thiosulfate standard liquid to blue until the blue color disappears, i.e. an end point is achieved. The method avoids the use of a rank poison of sodium arsenite, reduces the reducing acidity and improves the operation conditions. The invention can be directly used for titrating an excessive iodine solution with sodium thiosulfate without repeatedly titrating the standard liquid for multiple times, can obtain accurate and reliable result and is more applicable for analysis and measurement of a flow sample.

The invention relates to the preparation of 131I-thyroid stimulating hormone (TSH) and an application thereof, belonging to the field of radionuclide therapeutic drugs. The compound 131I-thyroid stimulating hormone is a radioiodine marker for thyroid stimulating hormone with pathoclisis in vivo acting on thyrocyte. A preparation method of the 131I-thyroid stimulating hormone comprises the following steps of: carrying out iodine 131 marking on the thyroid stimulating hormone by utilizing a chloramine-T method, a peroxide oxidation method or an iodogen method, and introducing radionuclide iodine 131 for treatment into tyrosine residues in thyroid stimulating hormone molecules. The marking rate of the prepared 131I-TSH is 85.9 percent, the radiochemical purity after purification achieves more than 90 percent, and the prepared 131I-TSH can be stored stably for more than one week at room temperature; the 131I-TSH is mainly metabolized through the liver and excreted through the kidneys; the percentage of ID/g of the 131I-TSH in the thyroid gland is not obviously reduced in four hours; and the 131I-TSH can be concentrated in thyroid gland issues sealed by an iodine solution. Concerning low/undifferentiated thyroid tumours incapable of iodine uptake, the 131I-TSH can increase the radioiodine uptake of thyroid gland cancer cells, and the radioiodine 131 can be chosen for treatment.

Provided is a saccharifying enzyme type time-temperature indicator. Dextrin solution and iodine solution are mixed to form mixing solution, the mixing solution and saccharifying enzyme liquid are independently packaged, and the mixing solution and the saccharifying enzyme liquid are mixed when in use. The purposes of indicating storage temperature and time are achieved by utilizing hydrolysis reaction of saccharifying enzyme and dextrin, using the iodine solution as indicating agents and displaying cumulative effects of time and temperature through color changes. The time-temperature indicator is stable in reaction system, obvious in color showing effect, low in cost and easy to practically apply.

The invention discloses a medical mechanical device capable of automatically treating wound and achieving disinfection. The device comprises an operation box, an operation cavity is formed in the operation box, a threaded rod penetrating through the operation cavity is fixedly arranged on the inner walls of the left side and the right side of the operation cavity, and a replacing device capable ofautomatically replacing a cotton swab after the wound is wiped is arranged on the threaded rod; the replacing device comprises a wiping box in threaded connection to the threaded rod, a rotating motor is fixedly arranged on the right side of the wiping box, a wiping cavity penetrating through the wiping box up and down is formed in the wiping box, a first electromagnet is fixedly arranged on theinner wall of the right side of the wiping cavity, and the first electromagnet controls a cross iron plate. According to the device disclosed by the invention, used cotton swabs and a second cotton swab dipped with iodine solution are used for disinfecting a wound through the replacing device, the used cotton swabs can be automatically put into a garbage can, and then the wound can be sutured through an extrusion device.

The invention provides a method for determining a starch content of cane juice or syrup. The method comprises steps of: 1) heating to boil the cane juice or the syrup and carrying out a pumping filtration to obtain a cane juice or syrup clear liquid; 2) adding high temperature amylase into the clear liquid from step 1) and reacting in a water-bath; 3) adding hydrochloric acid and the clear liquidfrom step 2) in series comparison tubes and mixing well; 4) then adding series starch solutions with different volumes into the series comparison tubes; 5) adding iodine solutions into the series comparison tubes respectively; 6) determining starch absorbances of series mixtures obtained in the step 5) and drafting a working curve of the absorbance and the starch content; 7) adding hydrochloric acid and iodine liquid into the clear liquid from step 1) and determining a starch content according to the working curve obtained from step 6). The determination method of the present invention is rapid, accurate, with small error and simply operated.

The invention discloses a solid enzyme type time-temperature indicator, and the indicator employs the hydrolysis reaction of saccharifying enzyme and starch, takes iodine solution as an indicator, and displays the time and temperature accumulative effect through color change, thereby achieving a purpose of indicating the time and temperature in a storage and conveying process. Starch and iodine solution are mixed together, and then are dried and smashed after color changing. The smashed mixture is mixed with emulgator solution and saccharifying enzyme microcapsules to form mash, and then mash is disposed on a paper board in a coating manner and is dried to form a color-changing bottom layer. Agar solution is prepared and cooled to form a cover plate with a certain shape for standby use. The bottom layer is combined with the cover plate, thereby activating the indicator. The indicator is apparent in color display effect, is lower in cost, and is convenient to use.

There is provided a method for producing a polarizer having improved cross transmittance. The method for producing a polarizer includes: dyeing a polyvinyl alcohol (PVA)-based film with molecular iodine by immersing the PVA-based film in an aqueous iodine solution (a dyeing step); absorbing the molecular iodine into the PVA-based film using an aqueous boric acid solution (a cross-linking step); arranging the molecular iodine in the certain direction by stretching the PVA-based film in a certain direction (an stretching step); and drying, in an oven, the PVA-based film in which the molecular iodine is oriented; wherein a phosphate compound is added to the iodine aqueous solution (the dyeing step) or the aqueous boric acid solution(the stretching step) so that a weight ratio of the boric acid:the phosphate compound is in a range of 1:0.1 to 1:10.

The invention belongs to the technical field of perovskite absorption materials, and discloses a two-dimensional perovskite light absorption material and a preparation method thereof. The molecular formula is (BEA)0.5(M)nPbnI3n+1. The preparation method comprises the following steps: (1) stirring 1,4-butanediamine and hydroiodic acid with the mass content of 50% to 60% according to a chemical metering molar ratio at room temperature for a reaction for 2 to 3 h to obtain a 1,4-butanediamine iodine solution; (2) synthesizing a (BEA)0.5(M)nPbnI3n+1 single crystal material: after mixing lead acetate, hydroiodic acid with the mass content of 50% to 60% and a hypophosphorous acid water solution with the mass content of 50% to 55%, stirring to form a uniform solution, controlling the temperatureat 60 to 80 DEG C for a stirring reaction for 1 to 2 h; then adding an iodine compound into the solution, then dropwise adding 1,4-butanediamine iodine solution, controlling the temperature at 100 to130 DEG C after dropwise adding is finished for a stirring reaction for 1 to 2 h; and finally washing and filtering to obtain the two-dimensional perovskite light absorption material. The prepared two-dimensional perovskite light absorption material is taken as a light absorption layer of a perovskite solar cell, and the corresponding solar cell has extremely high efficiency, and also has extremely high stability.

A method for rejuvenating a reverse osmosis (RO) membrane which is subject to biofilm and other contaminants in an aqueous system through the use of a free molecular iodine solution at a pH of about 2.2 to 4.0.

The invention relates to enzymolysis oat powder and a preparation method thereof. The enzymolysis oat powder is prepared from oat, thermostable amylase and composite phosphate and is characterized in that the adding amount of thermostable amylase is 0.05-0.3% of the weight of oat, and the adding amount of composite phosphate is 0.05-0.3% of the weight of oat. The production method comprises the following steps: pouring cleaned oat into a cooking tank, adding water and composite phosphate and heating to cook thoroughly, injecting hot water into an enzymolysis tank and adding 20% of thermostable amylase to prepare a hydrolysate, adding thoroughly cooked oat into hydrolysate for defibrination until the grain diameter is more than 40 meshes, then sieving to obtain a mixed slurry, adding the rest 80% of thermostable amylase into the mixed slurry, carrying out heat preservation for 60min at 95 DEG C, testing enzymolysis terminal by using an iodine solution, regulating pH to 7.05-7.15 after enzymolysis is finished, oscillating with a 100-mesh sieve and filtering to remove slag, and carrying out enzyme deactivation, sterilization, concentration and spray drying on the filtrate, thus obtaining the production disclosed by the invention. The enzymolysis oat powder is in accordance with the recommended proportion of dietary reference intakes of Chinese residents, is complete in nutrition, contains rich water soluble dietary fiber, is long in guarantee period, and tastes fine and smooth and thick in eating.

The invention relates to a method for determining the content of sulfite in a wet desulphurization slurry. The method comprises the following determination steps: 1, adding 50ml of an acetic acid-sodium acetate buffer solution having a pH value of 4.0-5.7 and 10.00ml of a 0.1mol/L iodine standard solution to a stopper possessed measuring flask; 2, adding a tested sample filtrate until the iodine solution becomes flavescent or tannish, and carrying to a laboratory under a dark condition; 3, adding 1ml of a 1% starch solution to make the tested sample become blue; 4, titrating the sample solution with a 0.1mol/L sodium hyposulfite standard solution until the blue color disappears, and recording the consumption amount of the sodium hyposulfite standard solution; carrying out a blank experiment; and 6, calculating to obtain the content of sulfite. The method which allows the buffer solution to be added in the sampling process has the advantages of avoiding of the oxidation in the sampling process, prevention of the interference of components comprising S2O3<2-> and the like in the test process, increase of the interference resistance of the slurry in the sampling and testing process, and improvement of the accuracy and the reliability of the test result.

The invention discloses a breeding method of sterile and maintainer lines of north glutinous sorghum. The breeding method comprises the following specific steps: 1, hybridizing by taking non-glutinous sorghum LgB/R5M874B of a maintainer line as a female parent and a glutinous sorghum maintainer line 45B as a male parent, and inbreeding generations by selecting single plants with three good characters of glutinousness, large spikes and early mature; 2, hybridizing by taking a non-glutinous sorghum sterile line A2V4A as a female parent and an F2 generation in the step one as a male parent, carrying out four-generation backcross transformation by adopting a method of carrying out stable hybridization together with backcross transformation and taking good single plants of a filial generation as a male parent, and breeding a glutinous sorghum sterile line by taking good sterility, glutinous grains and heat smut resistance as breeding standards, wherein in glutinousness identification in the step one or step two, only endosperm is cut for carrying out iodine solution reaction, so that normal sprouting of the glutinous grains is ensured, and embryo is prevented from being damaged due to length cutting of the grains. According to the breeding method disclosed by the invention, good characters of yield, quality, resistance, combining ability, appearance and the like of south and north sorghum are organically integrated, so that the sterile and maintainer lines can become basic parent lines of the north glutinous sorghum, and the germplasm resource of the glutinous sorghum is enriched.