A polymer prepared from polyvinyl acetates by replacement of the acetate groups with hydroxyl groups. It is used as a pharmaceutic aid and ophthalmic lubricant as well as in the manufacture of surface coatings artificial sponges, cosmetics, and other products.
A polyvinyl resin used extensively in the manufacture of plastics, including medical devices, tubing, and other packaging. It is also used as a rubber substitute.
Behaviors associated with the ingesting of alcoholic beverages, including social drinking.
Gauze material used to absorb body fluids during surgery. Referred to as GOSSYPIBOMA if accidentally retained in the body following surgery.
Sterile, gelatin-base surgical sponge applied topically as an adjunct to hemostasis when the control of bleeding by conventional procedures is ineffective to reduce capillary ooze or is impractical. (From AMA Drug Evaluations Annual, 1994, p797)
A method of hemostasis utilizing various agents such as Gelfoam, silastic, metal, glass, or plastic pellets, autologous clot, fat, and muscle as emboli. It has been used in the treatment of spinal cord and INTRACRANIAL ARTERIOVENOUS MALFORMATIONS, renal arteriovenous fistulas, gastrointestinal bleeding, epistaxis, hypersplenism, certain highly vascular tumors, traumatic rupture of blood vessels, and control of operative hemorrhage.
Organic mercury compounds in which the mercury is attached to a phenyl group. Often used as fungicides and seed treatment agents.
A tissue adhesive that is applied as a monomer to moist tissue and polymerizes to form a bond. It is slowly biodegradable and used in all kinds of surgery, including dental.
Ethyl ester of iodinated fatty acid of poppyseed oil. It contains 37% organically bound iodine and has been used as a diagnostic aid (radiopaque medium) and as an antineoplastic agent when part of the iodine is 131-I. (From Merck Index, 11th ed)
Alkyl compounds containing a hydroxyl group. They are classified according to relation of the carbon atom: primary alcohols, R-CH2OH; secondary alcohols, R2-CHOH; tertiary alcohols, R3-COH. (From Grant & Hackh's Chemical Dictionary, 5th ed)
Agents employed in the preparation of histologic or pathologic specimens for the purpose of maintaining the existing form and structure of all of the constituent elements. Great numbers of different agents are used; some are also decalcifying and hardening agents. They must quickly kill and coagulate living tissue.
Chronic inflammation and granuloma formation around irritating foreign bodies.
Administration of antineoplastic agents together with an embolizing vehicle. This allows slow release of the agent as well as obstruction of the blood supply to the neoplasm.
Sterile solutions that are intended for instillation into the eye. It does not include solutions for cleaning eyeglasses or CONTACT LENS SOLUTIONS.
Relating to the size of solids.
Substances added to pharmaceutical preparations to protect them from chemical change or microbial action. They include ANTI-BACTERIAL AGENTS and antioxidants.
The preparation, mixing, and assembling of a drug. (From Remington, The Science and Practice of Pharmacy, 19th ed, p1814)
Areas designated for use by the armed forces personnel.
A benign familial disorder, transmitted as an autosomal dominant trait. It is characterized by low-grade chronic hyperbilirubinemia with considerable daily fluctuations of the bilirubin level.
The process of producing a form or impression made of metal or plaster using a mold.
The process of cleaving a chemical compound by the addition of a molecule of water.
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.
Alloys that contain a high percentage of gold. They are used in restorative or prosthetic dentistry.
Specific alloys not less than 85% chromium and nickel or cobalt, with traces of either nickel or cobalt, molybdenum, and other substances. They are used in partial dentures, orthopedic implants, etc.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Energy transmitted from the sun in the form of electromagnetic radiation.
A publication issued at stated, more or less regular, intervals.
A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.
Individual's rights to obtain and use information collected or generated by others.
A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].
"The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.
Silver. An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.
Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
Nanoparticles produced from metals whose uses include biosensors, optics, and catalysts. In biomedical applications the particles frequently involve the noble metals, especially gold and silver.
A silver salt with powerful germicidal activity. It has been used topically to prevent OPHTHALMIA NEONATORUM.
Pollution prevention through the design of effective chemical products that have low or no toxicity and use of chemical processes that reduce or eliminate the use and generation of hazardous substances.
A type of MONOTERPENES, derived from geraniol. They have the general form of cyclopentanopyran, but in some cases, one of the rings is broken as in the case of secoiridoid. They are different from the similarly named iridals (TRITERPENES).
A subclass of iridoid compounds that include a glycoside moiety, usually found at the C-1 position.
Renewal or repair of lost bone tissue. It excludes BONY CALLUS formed after BONE FRACTURES but not yet replaced by hard bone.
Condition of having pores or open spaces. This often refers to bones, bone implants, or bone cements, but can refer to the porous state of any solid substance.
X-RAY COMPUTERIZED TOMOGRAPHY with resolution in the micrometer range.
A network of cross-linked hydrophilic macromolecules used in biomedical applications.
Hydrocarbon-rich byproducts from the non-fossilized BIOMASS that are combusted to generate energy as opposed to fossilized hydrocarbon deposits (FOSSIL FUELS).

A retrospective cohort study of male workers exposed to PVA fibers. (1/220)

In order to ascertain whether PVA fibers can produce cancer in humans or not, we have conducted a retrospective cohort study of workers exposed to PVA fibers. A total of 447 exposed and 2416 non-exposed male workers who were engaged before 1980 were followed up until the end of 1996. The SMR for all causes was 0.57 (observed 38, 95% CI: 0.41-0.78) for the exposed, and 0.66 (observed 210, 95% CI: 0.58-0.75). As for lung cancer, its SMR was 0.77 (observed 3, 95% CI: 0.15-2.24) for the exposed workers and 0.67 (12 observed, 95% CI: 0.34-1.16) for the non-exposed workers. Lung cancer SMR was 0.86 (observed 2, 95% CI: 0.10-3.11) for the workers with 20 or more years' employment. This study showed no difference in lung cancer risk between the workers exposed to PVA fibers and the non-exposed workers.  (+info)

Enhanced degradation of polyvinyl alcohol by Pycnoporus cinnabarinus after pretreatment with Fenton's reagent. (2/220)

Degradation of polyvinyl alcohol (PVA) was investigated by using a combination of chemical treatment with Fenton's reagent and biological degradation with the white rot fungus Pycnoporus cinnabarinus. Inclusion of the chemical pretreatment resulted in greater degradation of PVA than the degradation observed when biological degradation alone was used.  (+info)

Hypervascular spinal tumors: influence of the embolization technique on perioperative hemorrhage. (3/220)

BACKGROUND AND PURPOSE: Corporectomy is an effective treatment for vertebral metastases; however, massive perioperative hemorrhage is often associated with this procedure. We compared preoperative particle, particle-coil, and coil embolizations of hypervascular spinal tumors prior to vertebral body replacement to determine which prevented perioperative hemorrhage most effectively. METHODS: The vertebral tumors of 59 patients were embolized prior to corporectomy. In 26 cases, only coils were used for the proximal occlusion of feeding segmental arteries. Twenty-four patients received a combination of polyvinyl alcohol (PVA) particles and coils, and nine tumors were embolized with particles alone. We compared intraoperative blood loss between the three groups and 10 other patients who did not undergo embolization prior to corporectomy. RESULTS: Estimation of intraoperative hemorrhage showed a median value of 4350 mL in patients without embolization, 2650 mL in cases of coil embolization, 1850 mL in cases of particle-coil embolization, and 1800 mL in cases of particle embolization. The difference between unembolized patients and those who underwent coil embolization was not statistically significant. Particle and particle-coil embolizations showed very similar results, and reduced hemorrhage significantly as compared to unembolized and proximal coil occlusion cases. Residual bleeding came from the venous system and the neighborhood of the embolized region. CONCLUSION: Particle embolization prior to corporectomy can reduce perioperative hemorrhage. The additional benefit of proximal coil occlusion of arterial feeders is questionable.  (+info)

Water-soluble aluminium phthalocyanine-polymer conjugates for PDT: photodynamic activities and pharmacokinetics in tumour-bearing mice. (4/220)

The potential use of unsubstituted aluminium phthalocyanine (AlClPc) as a sensitizer for photodynamic therapy (PDT) of cancer has not been fully exploited in spite of its higher efficiency as compared to the sulphonated derivatives. This is largely due to the strong hydrophobic character of AlClPc which renders the material difficult to formulate for in vivo administration. We prepared two water-soluble derivatives of AlClPc by axial coordination of polyethyleneglycol (PEG, MW 2000) or polyvinylalcohol (PVA, MW 13,000-23,000) to the central aluminium ion. Their photodynamic activities were evaluated in vitro against the EMT-6 mouse mammary tumour cells and in vivo against the EMT-6 and the colon carcinoma Colo-26 tumours implanted intradermally in Balb/c mice. Pharmacokinetics were studied in the EMT-6 tumour-bearing mice. After 1 h incubation, the light dose required to kill 90% of cells (LD90) was at least three times less for AlClPc (Cremophor emulsion) as compared to AlPc-PEG and AlPc-PVA, while after 24 h incubation all three preparations were highly phototoxic. All three dye preparations induced complete EMT-6 tumour regression in 75-100% of animals at a low drug dose (0.25 micromol kg(-1)) following PDT (400 J cm(-2), 650-700 nm) at 24 h pi. Complete tumour regression in the Colo-26 tumour model was obtained in 30% of mice at a dose of 2 micromol kg(-1). In the non-cured animals, AlPc-PVA induced the most significant tumour growth delay. This dye showed a prolonged plasma half-life (6.8 h) as compared to AlClPc (2.6 h) and AlPc-PEG (23 min), lower retention by liver and spleen and higher tumour-to-skin and tumour-to-muscle ratios. Our data demonstrate that addition of hydrophilic axial ligands to AlPc, while modifying in vitro and in vivo kinetics, does not reduce the PDT efficiency of the parent molecule. Moreover, in the case of the polyvinylalcohol derivative, axial coordination confers advantageous pharmacokinetics to AlPc, which makes this photosensitizer a valuable, water soluble candidate drug for clinical PDT of cancer.  (+info)

Comparative hazards of chrysotile asbestos and its substitutes: A European perspective. (5/220)

Although the use of amphibole asbestos (crocidolite and amosite) has been banned in most European countries because of its known effects on the lung and pleura, chrysotile asbestos remains in use in a number of widely used products, notably asbestos cement and friction linings in vehicle brakes and clutches. A ban on chrysotile throughout the European Union for these remaining applications is currently under consideration, but this requires confidence in the safety of substitute materials. The main substitutes for the residual uses of chrysotile are p-aramid, polyvinyl alcohol (PVA), and cellulose fibers, and it is these materials that are evaluated here. Because it critically affects both exposure concentrations and deposition in the lung, diameter is a key determinant of the intrinsic hazard of a fiber; the propensity of a material to release fibers into the air is also important. It is generally accepted that to be pathogenic to the lung or pleura, fibers must be long, thin, and durable; fiber chemistry may also be significant. These basic principles are used in a pragmatic way to form a judgement on the relative safety of the substitute materials, taking into account what is known about their hazardous properties and also the potential for uncontrolled exposures during a lifetime of use (including disposal). We conclude that chrysotile asbestos is intrinsically more hazardous than p-aramid, PVA, or cellulose fibers and that its continued use in asbestos-cement products and friction materials is not justifiable in the face of available technically adequate substitutes.  (+info)

Embolization of cerebral arteriovenous malformations achieved with polyvinyl alcohol particles: angiographic reappearance and complications. (6/220)

BACKGROUND AND PURPOSE: The appropriate choice of embolic materials with respect to the permanency of obliterated nidi after embolization and complications related to the procedure is essential for safe and effective embolization of cerebral arteriovenous malformations (AVMs). Our purpose was to ascertain the recanalization and complication rates after AVM treatment with polyvinyl alcohol (PVA) particles. METHODS: Between 1988 and 1994, 36 AVMs were embolized with PVA particles at our institution. Follow-up angiographic findings and occurrence of complications during the embolization procedures were analyzed retrospectively. RESULTS: Complete obliteration of the nidus immediately after embolization was achieved in five patients, and 80% to 99% obliteration was attained in 12 patients. Fifty-one follow-up angiographic examinations were performed 1 week to 60 months (mean, 7 months) after embolization in 31 patients. An increase in nidal size was seen on 15 follow-up angiograms (29%) and a decrease was seen in seven (14%). In 28 of the 51 angiograms obtained more than 1 month after follow up (mean, 13 months), 12 (43%) showed AVM enlargement. In four (80%) of five cases of complete obliteration, nidi reappeared on follow-up angiograms. Hemorrhagic complications occurred in three cases and ischemic ones in seven. One patient (3%) died and five (14%) suffered persistent neurologic deficits. CONCLUSION: Embolization with PVA particles can produce significant volume reduction in AVM nidal size, but recanalization is a distinct possibility.  (+info)

Targeted delivery of anti-angiogenic agent TNP-470 using water-soluble polymer in the treatment of choroidal neovascularization. (7/220)

PURPOSE: The conjugation of drugs with water-soluble polymers such as poly(vinyl alcohol) (PVA) tends to prolong the half-life of drugs and facilitate the accumulation of drugs in tissues involving neovascularization. The purpose of this study was to evaluate the effect of TNP-470-PVA conjugate on the proliferation of endothelial cells in vitro and on experimental choroidal neovascularization (CNV) in vivo. METHODS: TNP-470 was conjugated in PVA by a dimethylaminopyridine-catalyzed reaction. The effects of TNP-470-PVA and free TNP-470 on the proliferation of human umbilical vein endothelial cells (HUVECs) and bovine retinal pigment epithelial cells (BRPECs) were evaluated by the tetrazolium-based colorimetric assay (XTT assay). Experimental CNV was induced by subretinal injection of gelatin microspheres containing basic fibroblast growth factor, into rabbits. Thirty rabbits were intravenously treated either with TNP-470-PVA (n = 8), free TNP470 (n = 5), free PVA (n = 5), or saline (n = 12) daily for 3 days, 2 weeks after implantation of gelatin microspheres. Fluorescein angiography was performed to detect the area with CNV, and the evaluation was made by computerized measurement of digital images. These eyes were also examined histologically. To observe the accumulation of conjugate, 3 rabbits with CNV received rhodamine B isothiocyanate-binding PVA (RITC-PVA), and the lesion was studied 24 hours later by fluorescein microscopy. RESULTS: The TNP-470-PVA inhibited the growth of HUVECs, similar to that of free TNP-470. The BRPECs were less sensitive to TNP-470-PVA than were the HUVECs. TNP-470-PVA significantly inhibited the progression of CNV in rabbits (P = 0.001). Histologic studies at 4 weeks after treatment demonstrated that the degree of vascular formation and the number of vascular endothelial cells in the subretinal membrane of the eyes treated with TNP-470-PVA were less than those of the control eyes. RITC-PVA remained in the area with CNV 24 hours after administration. CONCLUSIONS: These results suggest that TNP-470-PVA inhibited the proliferation of HUVECs more sensitively than that of BRPECs, and the targeted delivery of TNP-470-PVA may have potential as a treatment modality for CNV.  (+info)

Evaluation of Streck tissue fixative, a nonformalin fixative for preservation of stool samples and subsequent parasitologic examination. (8/220)

We undertook a study to evaluate Streck tissue fixative (STF) as a substitute for formalin and polyvinyl alcohol (PVA) in fecal preservation. A comparison of formalin, PVA, (mercuric chloride based), and STF was done by aliquoting fecal samples into each fixative. Stool specimens were collected in Haiti, and parasites included Cyclospora cayetanensis, Giardia intestinalis, Entamoeba coli, Iodamoeba butschlii, Endolimax nana, Ascaris lumbricoides, Trichuris trichiura, Strongyloides stercoralis, and Necator americanus. Preserved stools were examined at various predetermined times (1 week, 1 month, and 3 months) to establish the quality of the initial preservation as well as the suitability of the fixative for long-term storage. At each time point, stool samples in fixatives were examined microscopically as follows: (i) in wet mounts (with bright-field and epifluorescence microscopy), (ii) in modified acid-fast-, trichrome-, and safranin-stained smears, and (iii) with two commercial test kits. At the time points examined, morphologic features remained comparable for samples fixed with 10% formalin and STF. For comparisons of STF- and 10% formalin-fixed samples, specific findings showed that Cyclospora oocysts retained full fluorescence, modified acid-fast- and safranin-stained smears of Cryptosporidium and Cyclospora oocysts were equal in staining quality, and results were comparable in the immunofluorescence assay and enzyme immunoassay commercial kits. Stool fixed in STF and stained with trichrome showed less-than-acceptable staining quality compared with stool fixed in PVA. STF provides an excellent substitute for formalin as a fixative in routine examination of stool samples for parasites. However, modifications to the trichrome staining procedures will be necessary to improve the staining quality for protozoal cysts fixed in STF to a level comparable to that with PVA.  (+info)

Buy this report (Price 2900 USD for a single-user license) @ https://www.marketgrowthreports.com/purchase/17242744. Major Points from Table of Contents:. 1 Study Coverage. 1.1 Polyvinyl Alcohol Polyethylene Glycol Graft Copolymer Product. 1.2 Key Market Segments in This Study. 1.3 Key Manufacturers Covered. 1.4 Market by Type. 1.4.1 Global Polyvinyl Alcohol Polyethylene Glycol Graft Copolymer Market Size Growth Rate by Type. 1.5 Market by Application. 1.5.1 Global Polyvinyl Alcohol Polyethylene Glycol Graft Copolymer Market Size Growth Rate by Application. 1.6 Study Objectives. 1.7 Years Considered. 2 Executive Summary. 2.1 Global Polyvinyl Alcohol Polyethylene Glycol Graft Copolymer Production. 2.1.1 Global Polyvinyl Alcohol Polyethylene Glycol Graft Copolymer Revenue 2014-2026. 2.1.2 Global Polyvinyl Alcohol Polyethylene Glycol Graft Copolymer Production 2014-2026. 2.1.3 Global Polyvinyl Alcohol Polyethylene Glycol Graft Copolymer Capacity 2014-2026. 2.1.4 Global Polyvinyl Alcohol Polyethylene ...
Trisacryl gelatin microspheres versus polyvinyl alcohol particles in the preoperative embolization of bone neoplasms. - Antonio Basile, Thomas Rand, Fritz Lomoschitz, Cyril Toma, Tommaso Lupattelli, Joachim Kettenbach, Johannes Lammer
Pmaudlleeaaiaia 2,401,642 POLYVINYL aLconoL casrnvc SOLUTION Gilbert W. Brant, Buffalo, N. Y., aaaignor to E. I. du Pont de Nemours & Company, Wilmington, Del., a corporation of Dela No Drawing. Application September 2, 1944, Serial No. 552.511 This invention relates to the manufacture of films of polyvinyl alcohol, and more particularly 1 to the stripping from the casting surface of sheets or films of polyvinyl alcohol formed by the dry- I castingprccess. The term polyvinyl alcohol appearing hereinafter is employed in its accepted trade sense and denotes the water-soluble types of partially saponified and fully saponified polyvinyl acetate. In the formation of continuous. films of soluble film-forming material such as polyvinyl alcohol, it is the conventional practice to fiow a film of a solution of the film-forming material onto the casting surface, for example,a metal wheel or belt, cause the solvent to be substantially completely removed from the liquid film whereby to form a ...
Alfa Aesar™ Polyvinyl alcohol, 86-89% hydrolyzed, medium molecular weight 25g Alfa Aesar™ Polyvinyl alcohol, 86-89% hydrolyzed, medium molecular...
Polyvinyl alcohol definition is - a polymer of vinyl alcohol; especially : a thermoplastic resin that is soluble or swells in water, that if obtained by complete hydrolysis of polyvinyl acetate has the formula [-CH2CH(OH)-]x or if by partial hydrolysis contains some acetate groups, and that is used chiefly as emulsifiers, adhesives, and films resistant to solvents and abrasion, and in making molded and extruded products and polyvinyl acetals.
Polyvinyl alcohol films are provided which are gelled, non-tacky, bubble-free and resistant to water at ambient temperatures. The polyvinyl alcohol film is obtained by plasticizing (fluxing) and melting granules of pure polyvinyl alcohol containing from 25 to 35% by weight of water at a temperature at least 100 C. above the equilibrium melting point of the granules and less than or equal to 220 C., and extruding the melted granules through a die at a temperature at least 5 C. above the equilibrium melting point of the granules and less than or equal to 98 C., optionally followed by monoaxial stretching or biaxial stretching of the unstretched film obtained. The stretched or unstretched film may be heat-treated to improve its properties. The polyvinyl alcohol film can be used to prepare with thermoplastic films composite films or sheets having a high gas impermeability. The invention also provides composite, biaxially oriented, impermeable barrier layer coated, thermoplastic hollow shaped articles
Nominated Substances: Polyvinyl alcohol. Nomination Date: 07/21/1987 Nominator: FDA Rationale: Widespread use as a film used for intravaginal implantation of a spermicide and concern about absorption of polyvinyl alcohol (PVA). NTP Principles: not specified ...
Food packaging should ensure the safety and quality of food, minimize spoilage and provide an easy way of storing and handling it. Barrier coatings are generally used to meet the demands placed on fibre-based food packages, as these have the ability to regulate the amount of gases that can enter them. Some gases are detrimental to food quality: oxygen, for example, initiates lipid oxidation in fatty foods. Using both experimental data and computer modelling, this thesis explains some aspects of how the structure of barrier coatings influences the mass transport of oxygen with the aim of obtaining essential knowledge that can be used to optimize the performance of barriers.. Barrier coatings are produced from polyvinyl alcohol and kaolin blends that are coated onto a polymeric support. The chemical and physical structures of these barriers were characterized according to their influence on permeability in various climates. At a low concentration of kaolin, the crystallinity of polyvinyl alcohol ...
A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer to provide a product which has low gas permeability and water absorptivity characteristics, and which has a melting point sufficiently below its decomposition point to allow melt extrusion. The alloy may optionally be mixed with a polyolefin blending resin.
Formed articles made from polyvinyl alcohol having an oxygen permeability of no more than about 1 cc mil/100 in2 24 hr atm. at 80% relative humidity, compositions suitable for use in manufacturing such articles and a process for manufacturing such articles by forming polyvinyl alcohol containing a non-hydroxyl plasticizer in a substantially water-free condition and cooling at a rate sufficiently slow to provide the enhanced impermeability, are disclosed.
Buy Polyvinyl Alcohol (Hot) online at ibuychemikals.com from a few mg to 25 Kg. Process to Buy Polyvinyl Alcohol (Hot) Online at the chemical shop is same as ordering from an e-com website.
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Reports emphasize developments in process technology for Polyvinyl Acetate and Polyvinyl Alcohol that have potential implications for the chemical and energy industries
This invention relates to a new and improved light-polarizing sheet comprising molecularly oriented polyvinyl alcohol containing an oriented block segments of polyvinylene and said polyvinyl alcohol. In particular, the polarizing sheet comprises a polyvinylalcohol/polyvinylene block copolymer material wherein the polyvinylene blocks thereof are formed by molecular dehydration of a sheet of polyvinylalcohol; said sheet of polyvinylalcohol/polyvinylene block copolymer material comprising a uniform distribution of light-polarizing molecules of polyvinylalcohol/polyvinylene block copolymer material varying in the length, n, of the conjugated repeating vinylene unit of the polyvinylene block of the copolymer throughout the range of from 2 to 24; the concentration of each of said polyvinylene blocks, as determined by the absorption of wavelengths ranging from 200 to 700 nm remaining relatively constant, the degree of orientation of said light-polarizing molecules, as measured by the spectral dichroic ratio,
A polyvinyl alcohol (PVA) microporous membrane is disclosed which is prepared by a process which comprises forming a PVA membrane containing fine silica particles therein and substantially extracting said silica particles from said membrane, thereby forming a plurality of micropores therein with an average diameter of 0.01 to 50 microns and a porosity of at least 60%.
Haitung Chemicals Co,ltd are produce the highest quality (petro)chemicals produced by Sinopec. Main products include Vinyl Acetate Monomer(VAM),Polyvinyl Alcohol(PVA), etc.
This relates to partially acetalized polyvinyl alcohol embolization particles suitable for implanting in the human body, to compositions containing those particles, and to methods of making and using them.
A simplified route towards the synthesis of polyvinyl alcohol/silica/clay (PVA-SiO2-clay) composites was presented. PVA-SiO2-clay composites were prepared via solution intercalation method. All the composites were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), adsorption isotherm (BET), X-ray fluorescence (XRF), tensile test and Thermogravimetric Analysis (TGA). FTIR spectrum indicated that PVA-SiO2-clay composites especially clay (1.28E) loaded composites had much less transmittance percentage compared to pure PVA and others clay composites. The SEM revealed that the interfacial bonding between PVA-SiO2 and clay (1.28E) was much better than others clay loaded composites which was reflected in adsorption isotherm. The BET result also showed high specific surface area with low diameter of pore size of the composites. The thermal stability of PVA-SiO2-clay (1.28E) composites was the highest and it had higher activation energy due to the strong ...
Some friends and I are working on a movie, and we need a very stringy clear slime; like is produced with polyvinyl alcohol cross-linked with disodium tetraborate. Only we need it to be food-safe, so we cant simply use that. Is there another way to cross-link PVA into a stringy slime using edible chemicals ...
Page contains details about cencritchis muricatus peptide- polyvinyl alcohol nanofibers . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Easy to read patient leaflet for Phenylephrine and Polyvinyl Alcohol Eye Drops. Includes indications, proper use, special instructions, precautions, and possible side effects.
MURINE TEARS ORIGINAL (Polyvinyl alcohol,Povidone) drug information & product resources from MPR including dosage information, educational materials, & patient assistance.
Nanocomposite Materials: Effect of Freezing and Thawing Process on Betamethasone Acetate Release from Polyvinyl Alcohol Nanospheres
MURINE PLUS REDNESS RELIEF (Polyvinyl alcohol,Povidone,Tetrahydrozoline) drug information & product resources from MPR including dosage information, educational materials, & patient assistance.
默克药用低内毒素系列产品的生产工艺、生产环境、包装系统均严格符合高风险制剂的生产和研发要求。该系列产品以极低的内毒素/微生物控制水平以及全球领先的杂质控制技术大大降低了除菌工艺的风险和确保了制剂的长期稳定性。EMPROVE®文件系统,参考 ICH Q9 和 EU 2015/C95/02 提供风险评估支持,为国际化产品提供法规助力。 货号:141353. 品名:Polyvinyl alcohol 40-88 suitable for use as excipient EMPROVE® Essential Ph Eur,USP,JPE. 中文名:聚乙烯醇 40-88. 内毒素:≤0.03 I.U./mg. TAMC(总菌):≤1x10²CFU/g. TYMC(霉菌/酵母):≤1x10²CFU/g. ...
Polyvinyl Alcohol BP USP NF FCC Food Grade Manuacturers, SDS MSDS Sheet, Exporters to USA Canada Tanzania Egypt Turkey Argentina UAE
TY - JOUR. T1 - Correlation of hypoxia-inducible factor 1α with angiogenesis in liver tumors after transcatheter arterial embolization in an animal model. AU - Liang, Bin. AU - Zheng, Chuan Sheng. AU - Feng, Gan Sheng. AU - Wu, Han Ping. AU - Wang, Yong. AU - Zhao, Hui. AU - Qian, Jun. AU - Liang, Hui Min. PY - 2010/8. Y1 - 2010/8. N2 - This study sought to determine the expression of hypoxia-inducible factor 1α (HIF-1α) and its relation to angiogenesis in liver tumors after transcatheter arterial embolization (TAE) in an animal model. A total of 20 New Zealand White rabbits were implanted with VX2 tumor in liver. TAE-treated group animals (n = 10) received TAE with polyvinyl alcohol particles. Control group animals (n = 10) received sham embolization with distilled water. Six hours or 3 days after TAE, animals were humanely killed, and tumor samples were collected. Immunohistochemical staining was performed to evaluate HIF-1α and vascular endothelial growth factor (VEGF) protein expression ...
A method for preparing aqueous polymer emulsions in the presence of a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer as a protective colloid and aqueous polymer emulsions containing a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer.
Manufacturer Non-water Solute Pva Fiber For Concrete Countertops , Find Complete Details about Manufacturer Non-water Solute Pva Fiber For Concrete Countertops,Poly Alcohol Fibre Chopped Strand For Construction 6mm,Cement Polyvinyl Alcohol Fibre Pva Manufacturer Monofilament 8mm,Volume Concrete Pouring Pva Poly Alcohol Fiber 15um from Supplier or Manufacturer-Qingdao Sdgeo Material Co., Ltd.
Stewart, David J., Purvis, Duncan R., Lowe, Christopher R. (1990) Affinity chromatography on novel perfluorocarbon supports : Immobilisation of C.I. reactive blue 2 on a polyvinyl alcohol-coated perfluoropolymer support and its application in affinity chromatography. Journal of Chromatography A, 510. pp. 177-187. ISSN 0021-9673 ...
Autori: SILVIA PATACHIA1*, ARTUR J.M. VALENTE2, CLAUDIA BACIU1. Editorial: Elsevier, European Polymer Journal, 43, p.460-467, 2007.. Rezumat:. The aim of this paper to present the behaviour of the poly(vinyl alcohol) hydrogels [PVA-HG] in sodium and potassium chlorides aqueous solutions, due to their interactions. The tested [PVA-HG]-s have been obtained by repeated freezing and thawing cycles. White, heterogeneous hydrogels have been obtained. These hydrogels exhibit a mechanical active behaviour at their contact with electrolytes aqueous solutions, manifested by important changing in mass, volume and density of the hydrogel samples. These modifications could be explained by water elimination from the hydrogels that initially reached the equilibrium of swelling. The kinetic of the water desorption and the reversibility of this process, have been studied and some of the factors that influence this behaviour have been evidenced. The sensitivity of PVA hydrogels to electrolyte nature and ...
Photoactive polyvinyl alcohol hydrogels (PVA) have been investigated for use as tissue engineering scaffolds. These materials allow in situ polymerization for minimally invasive implantation methods. The mechanical properties of these materials can be tailored for a variety of soft tissue applications. The Youngs modulus and ultimate tensile strength of PVA hydrogels are increased with increasing polymer concentration, and highly elastic hydrogels can be formed by altering the number of crosslinkable groups per chain. Fibroblasts homogeneously seeded within 3 mm thick PVA hydrogels remained viable throughout 2 weeks in culture, with no differences in viability across the thickness of the hydrogel. Cells seeded within the PVA hydrogels also produce extracellular matrix proteins, as indicated by the production of hydroxyproline during culture. Intrinsically cell non-adhesive, these PVA hydrogels were functionalized with the cell-adhesive peptide RGDS and found to support the attachment and ...
The aims of this work were to develop a processable, electrospun formulation of a model biopharmaceutical drug, β-galactosidase, and to demonstrate that higher production rates of biopharmaceutical-containing fibers can be achieved by using high-speed electrospinning compared to traditional electrospinning techniques. An aqueous solution of 7.6 w/w% polyvinyl alcohol, 0.6 w/w% polyethylene oxide, 9.9 w/w% mannitol, and 5.4 w/w% β-galactosidase was successfully electrospun with a 30 mL/h feeding rate, which is about 30 times higher than the feeding rate usually attained with single-needle electrospinning. According to X-ray diffraction measurements, polyvinyl alcohol, polyethylene oxide, and β-galactosidase were in an amorphous state in the fibers, whereas mannitol was crystalline (δ-polymorph). The presence of crystalline mannitol and the low water content enabled appropriate grinding of the fibrous sample without secondary drying. The ground powder was mixed with excipients
Solid dosage forms of bioactive materials for parenteral administration such as porcine or bovine somatotropin pellets intended for subcutaneous implantation to improve food production of farm animals are coated with polyvinyl alcohol to extend the release characteristics of the material. The polyvinyl alcohol preferably has a molecular weight of from about 20,000 to 100,000, a degree of hydrolysis of at least about 98%, and is applied from an aqueous solution by spray coating to form a continuous uniform covering 3 to 25 μm PVA/mm2.
Starch is a naturally occurring biopolymer with sustainable resource. This biopolymer has lower tensile strength. To overcome this, it is blended with Poly-vinyl Alcohol ..
Japans largest platform for academic e-journals: J-STAGE is a full text database for reviewed academic papers published by Japanese societies
For a number of years, plastic wastes have been accumulating at such a rate that there are now huge environmental concerns with their disposal. Options such as landfill and incineration have not been well received by the public, or indeed government legislation, and focus is now firmly upon the use of biodegradable alternatives for mass applications ...
. The Hamburg Macromolecular Symposium 2005 with the title Olefin Polymerization involved topics such as new catalysts and cocatalysts, kinetics, mechanism and polymer reaction engineering, synthesis of special polymers, and characterization of polyolefins.
0031]Polyvinyl alcohol useful for purposes of the present invention are available in many forms and in a variety of strengths from Dupont Corporation (Wilmington, Del.), Kuraray Corporation (Houston, Tex.), Nycon (Westerly, R.I.), and others. It is available in liquid, pre-cooked form, powder, and also in spun strands that are supplied in bundles of 30-50 thousand individual strands. The bundles are cut to size for the desired application, and then separated and applied via a nozzle. Strands of polyvinyl alcohol cut in 3/8 to 1/2 inch lengths can be added to the landscaping material at the colorant step, during the drying process, and blown onto the individual pieces of colored landscaping material, alone or in combination with the powdered form of the same material. This process will render each piece of landscaping material such that the PVOH or similar material is bonded onto the piece via the colorant, which is manufactured specifically to provide a permanent bond with the landscaping ...
Synonym: Ethenol homopolymer Formula: (C2H5O)n CAS: 9002-89-5 Notes: Used in the preparation of slime (4% solution) and to quiet protozoa (14% solution) Storage Code: Green general chemical storage
HypoTears Solution information about active ingredients, pharmaceutical forms and doses by Novartis, HypoTears Solution indications, usages and related health products lists
Barnes-Hind Wetting and Soaking Solution information about active ingredients, pharmaceutical forms and doses by Pilkington Barnes Hind, Barnes-Hind Wetting and Soaking Solution indications, usages and related health products lists
Retinyl acetate (RA) was effectively incorporated into nano-fibers of polyvinyl alcohol (PVA) at 10% (w/w) of PVA in order to develop encapsulating for prolong...
0019] Particularly preferred fiberization polymers include dextran, alginates, chitosan, guar gum compounds, starch, polyvinylpyridine compounds, cellulosic compounds, cellulose ether, hydrolyzed polyacrylamides, polyacrylates, polycarboxylates, polyvinyl alcohol, polyethylene oxide, polyethylene glycol, polyethylene imine, polyvinylpyrrolidone, polyacrylic acid, poly(methacrylic acid), poly(itaconic acid), poly(2-hydroxyethyl acrylate), poly(2-(dimethylamino)ethyl methacrylate-co-acrylamide), poly(N-isopropylacrylamide), poly(2-acrylamido-2-methyl-1-propanesulfonic acid), poly(methoxyethylene), poly(vinyl alcohol), poly(vinyl alcohol) 12% acetyl, poly(2,4-dimethyl-6-triazinylethylene), poly(3-morpholinylethylene), poly(N-1,2,4-triazolyethylene), poly(vinyl sulfoxide), poly(vinyl amine), poly(N-vinyl pyrrolidone-co-vinyl acetate), poly(g-glutamic acid), poly(N-propanoyliminoethylene), poly(4-amino-sulfo-aniline), poly[N-(p-sulphophenyl)amino-3-hydroxymethyl-1,4-phenyleneimino-1,4-pheny- lene)], ...
Several methods for auricular cartilage engineering use tissue engineering techniques. However, an ideal method for engineering auricular cartilage has not been reported. To address this issue, we developed a strategy to engineer auricular cartilage using silk fibroin (SF) and polyvinyl alcohol (PVA) hydrogel. We constructed different hydrogels with various ratios of SF and PVA by using salt leaching, silicone mold casting, and freeze-thawing methods. We characterized each of the hydrogels in terms of the swelling ratio, tensile strength, pore size, thermal properties, morphologies, and chemical properties. Based on the cell viability results, we found a blended hydrogel composed of 50% PVA and 50% SF (P50/S50) to be the best hydrogel among the fabricated hydrogels. An intact 3D ear-shaped auricular cartilage formed six weeks after the subcutaneous implantation of a chondrocyte-seeded 3D ear-shaped P50/S50 hydrogel in rats. We observed mature cartilage with a typical lacunar structure both in ...
Electrospinning technique was used to fabricate polyvinyl alcohol (PVA)-based magnetic biodegradable nanofibers. PVA solution was mixed with ferrofluid or magnetic nanoparticles (MNPs) powder and formed two individual nanofibrous membranes (PVA/ferrofluid and PVA/MNPs powder) by electrospinning. The surface morphology of the nanofibrous membrane was characterized by scanning electron microscopy and the magnetic properties were measured by vibrating sample magnetometer. Macrophages (RAW 264.7) were co-cultured with the nanofibrous membranes for 12, 24, and 48 h and exhibited good cell viability (,95%). Results showed that the PVA fibers would be degraded and the embedded Fe{sub 3}O{sub 4} nanoparticles would be released and delivered to cells. ...
In this study, poly(vinyl alcohol) nanofibres were produced and evaluated for wound dressing applications. However, the solubility of the poly(vinyl alcohol) matrix in the aqueous medium generally limits its applications. To overcome this problem, 1,2,3,4 butanetetracarboxylic acid (BTCA) and citric acid (CA) were used as crosslinking agents. Successful bead-free nanofibres were produced, and they both preserved their fibrous structure after water treatment. The mean fibre diameters of polycarboxylic acid crosslinked nanofibres were lower compared to pure PVA nanofibres. Although the morphology of BTCA and CA crosslinked nanofibres was similar, the swelling degree of PVA/CA was found to be higher. Furthermore, toxicity and keratinocyte cell proliferation performance of produced PVA/BTCA and PVA/CA nanofibres indicated that these nanofibrous materials could be used in wound dressing applications. ...
Global East Chlorinated Polyvinyl Chloride market report studies the market situation and outlook represents the global East Chlorinated Polyvinyl Chloride market size (value and volume) and Share by companies, type, application, and region. The widespread Global East Chlorinated Polyvinyl Chloride trends and opportunities are also taken into consideration in East Chlorinated Polyvinyl Chloride industry study East Chlorinated Polyvinyl Chloride Market report focus on the following section is to analyze the East Chlorinated Polyvinyl Chloride industry by adoption among various segments; the primary product types covered under the scope of the report.. This East Chlorinated Polyvinyl Chloride market report is a complete analysis of the East Chlorinated Polyvinyl Chloride market based on primary and secondary in-depth analysis. The scope of the East Chlorinated Polyvinyl Chloride market report includes global and regional sales, product consumption in terms of volume, and value. The global East ...
Poly(vinyl alcohol) (PVA)/Ag-zeolite nanocomposite hydrogels were prepared by UV irradiation using PVA solution mixed with Ag-zeolite nanoparticles. Physical properties and changes in morphology of the PVA/Ag-zeolite hydrogels were investigated. The PVA/Ag-zeolite hydrogels were prepared at a PVA concentration of 9 wt% with a UV irradiation distance of 15 cm, where gel fraction and swelling ratio were optimized. Hardness of the PVA/Ag-zeolite hydrogels decreased with increasing amounts of Ag-zeolite, reaching that of soft elastomer when the amount of Ag-zeolite was 5 % by weight. The PVA/Ag-zeolite hydrogels showed strong antimicrobial activities against Staphylococcus aureus and Klebsiellapneumoniae, inducing a reduction of bacteria of over 99.9 % at a Ag-zeolite content of 3 wt ...
AQUA, COPERNICIA CERIFERA CERA, CERA ALBA, BUTYLENE GLYCOL, STEARIC ACID, VP/EICOSENE COPOLYMER, PALMITIC ACID, ACACIA SENEGAL GUM, GLYCERYL STEARATE, AMINOMETHYL PROPANOL, CANDELILLA CERA, PVP, PHENOXYETHANOL, CAPRYLYL GLYCOL, POLYVINYL ALCOHOL, SODIUM DEHYDROACETATE, GOSSYPIUM HERBACEUM POWDER, HYDROLYZED SILK, NYLON-12, MALTODEXTRIN, DEHYDROACETIC ACID, SODIUM HYALURONATE, BENZYL ALCOHOL, CI 77499 ODER AQUA, COPERNICIA CERIFERA CERA, CERA ALBA, BUTYLENE GLYCOL, STEARIC ACID, VP/EICOSENE COPOLYMER, PALMITIC ACID, GLYCERYL STEARATE, ACACIA SENEGAL GUM, AMINOMETHYL PROPANOL, PVP, CANDELILLA CERA, PHENOXYETHANOL, CAPRYLYL GLYCOL, POLYVINYL ALCOHOL, SODIUM DEHYDROACETATE, GOSSYPIUM HERBACEUM POWDER, NYLON-12, HYDROLYZED SILK, BENZYL ALCOHOL, DEHYDROACETIC ACID, SODIUM HYALURONATE, CITRIC ACID, SORBIC ACID, CI 77499. ...
The nopal cactus (Opuntia ficus-indica) releases a substance through its mucilage, which comes from the degradation of pectic substances and chlorophyll. Combined in a polyvinyl alcohol matrix, this substance can be used as a recording medium. The resulting extract material has excellent photosensitizer properties, is easy to handle, has a low cost, and low toxicity. This material has the property of self-developing, and it can be used in holographic applications. The polyvinyl alcohol and extract from the nopal cactus was deposited by a gravity technique on a glass substrate, which dried to form a photosensitive emulsion. We show experimental results on a holographic grating using this material, written by a He-Cd laser (442 nm). We obtained diffraction gratings by transmission with a diffraction efficiency of approximately 32.3% to first order.
International Journal of Photoenergy is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of photoenergy. The journal consolidates research activities in photochemistry and solar energy utilization into a single and unique forum for discussing and sharing knowledge.
Here we communicate our experimental results on the synthesis of silver nanoparticles in solution and thin films using silver nitrate and poly vinyl alcohol (PVA) mixture at different concentrations and different laser irradiations. Detailed studies were carried out by varying pulse width, wavelength, exposure time, and energy of the laser. Formation of nanoparticles was confirmed through color change from transparent to yellow. Irradiated solutions and thin films at different concentrations showed plasmon peak in the absorption spectra. Formation of different sized nanoparticles at different energies with peak shift is observed. Transmission electron microscope (TEM) results confirmed the formation of nanoparticles with size of the particles varying from 2 to 200 nm. Formation of silver nanoparticles with hexagonal and different shapes were observed in particular with 355 nm laser irradiation. Influence of wavelength, pulse width, exposure time, and energy in the synthesis of silver ...
Ethylene-(vinyl alcohol) (EVOH)/organo-modified montmorillonite clay (OMMT) composites were prepared using commercial OMMTs with two different organo-modifiers. The first one has polar groups, which interact with EVOH chains, whereas the second one is non-polar. Composites with a high weight percentage of OMMT were prepared bymelt-extrusion in a twin-screw extruder. Films were prepared in a cast-film line in order to evaluate the tensile and fracture parameters. The morphology of the EVOH/OMMT composites was characterized using wide-angle X-ray scattering and transmission electron microscopy, complemented by image analysis. Themechanical propertieswere evaluated using uniaxial tensile tests; the fracture behaviour was analysed using the essential work of fracture (EWF) method. Results show differences in composite morphologies and crystalline fraction, depending on the content and the nature of the organo-modifier. The mechanical and fracture behaviours are strongly influenced by those ...
Global Rigid Polyvinyl Chloride(PVC) Market Status and Forecast 2021-2027 has complete details about market of Rigid Polyvinyl Chloride(PVC) industry, Rigid Polyvinyl Chloride(PVC) analysis and current trends. This report provides a comprehensive analysis of current global Rigid Polyvinyl Chloride(PVC) market based on segmented types and downstream applications. Major product development trends are discussed under major downstream segment scenario. This report also focuses on major driving factors and inhibitors that affect the market and competitive l.
with ZnO/CuO/Ag nanoparticles being formed within swollen carboxymethyl chitosan (CMCh)/poly(vinyl alcohol) (PVA) hydrogels. Different experimental techniques, including Fourier transform-infrared, X-ray diffraction (XRD), energy-dispersive X-ray (EDX) analysis, and scanning electron microscopy (SEM) were applied to study and compare the prepared hydrogels. XRD and EDX analyses confirmed the formation of nanoparticles in the hydrogel matrix, while SEM micrographs showed that ZnO, CuO and Ag nanoparticles ranged from 36.26 to 76.09 nm, 34.15-71.71 nm and 36.21-78.47 nm within the same matrix, respectively. According to the results, an increased number of nanoparticles resulted from increased ion concentration. At pH 2.1 and pH 7.4, the bio-nanocomposite hydrogels were investigated in terms of the swelling behaviour; in comparison with neat CMCh/PVA hydrogel, they showed a pH-sensitive swelling ratio. As an ...
Tissue engineering and nanotechnology have advanced a general strategy combining the cellular elements of living tissue with sophisticated functional biocomposites to produce living structures of sufficient size and function at a low cost for clinical relevance. Xylan, a natural polysaccharide was electrospun along with polyvinyl alcohol (PVA) to produce Xylan/PVA nanofibers for skin tissue engineering. The Xylan/PVA glutaraldehyde (Glu) vapor cross-linked nanofibers were characterized by SEM, FT-IR, tensile testing and water contact angle measurements to analyze the morphology, functional groups, mechanical properties and wettability of the fibers for skin tissue regeneration. The cell-biomaterial interactions were studied by culturing human foreskin fibroblasts on Xylan/ PVA Glu vapor cross-linked and Xylan/PVA/Glu blend nanofibrous scaffolds. The observed results showed that the mechanical properties (72 %) and fibroblast proliferation significantly increased up to 23 % (P < 0.05) in 48 h ...
Polyvinyl acetate: Polyvinyl acetate (PVAc), a synthetic resin prepared by the polymerization of vinyl acetate. In its most important application, polyvinyl acetate serves as the film-forming
Isododecane, Allyl Stearate/VA Copolymer, Water, Paraffin, Cera Alba (Beeswax), Disteardimonium Hectorite, Copernicia Cerifera (Carnauba) Wax, Alcohol Denat., Oryza Sativa (Rice) Bran Wax, Propylene Carbonate, Talc, Hydrogenated Jojoba Oil, Polyglycerol-4 Isostearate, Polyvinyl Laurate, Cetyl PEG/PPG 10/1 Dimethicone, Hexyl Laurate, Candelilla Cera (Candelilla Wax), 2 Oleamido 1, 3 Octadecanediol, Hydroxyethylcellulose, Ethylenediamine/Stearyl Dimer Dilinoleate Copolymer, Nylon 6, Ethylene/VA Copolymer, Acrylates Copolymer, Polyvinyl Alcohol, Silica, May Contain (+/-):, Iron Oxides ( CI 77491, CI 77492, CI 77499), Titanium Dioxide (CI 77891), Mica, Carmine (CI 75470), Chromium Oxide Greens CI 77288, Chromium Hydroxide Green (CI 77289), Ultramarines (CI 77007), Ferric Ferrocyanide (CI 77510), Black 2 (CI 77266), F.I.L. D47268/2. ...
A laser operated nanocomposites for linear electrooptics modulators based on cadmium sulfide (CdS) nanoparticles synthesized by electrochemical anodizing method in the polyvinyl alcohol (PVA) solvent are realized. The basic components are CdS nanoparticles. The XRD data confirm that the wurtzite component content was varied within the 10 % to 27%. Varying PVA solvent the average sizes have been changed. The synthesized powders consist of nano-sized particles with sizes varying within 11 nm…14.5 nm. It is demonstrated an influence of PVA content on the grain sizes. The diameter of particles of CdS is enhanced with an increasing PVA content. The PVA causes a significant increase in the size of the particles. The photoinduced electrooptics has been performed using as a photoinducing 120 fs femtosecond laser at 1045 nm. The linear electrooptics was probed by He-Ne cw laser at 1150 nm. A correlation between the content of wurtzite CdS component and the output electrooptics is found. The maximal ...
Approximately 400 million people harbor unruptured saccular aneurysms. In the US, 30,000 aneurysms rupture each year, causing stroke, permanent nerve damage, or subarachnoid hemorrhage. The current endovascular embolization method using platinum coils cannot treat wide-necked, large, or giant aneurysms. Other limitations of platinum coils include the inability to fill the aneurysm completely, coil herniation into the parent vessel, and delayed thrombus and organized tissue formation, which leave the area susceptible to recanalization and rupture. To address these disadvantages, we have developed a bioactive gel that forms in situ to conform and adhere to any aneurysm geometry, provide adequate mechanical support, and divert blood flow to heal the area with controlled cell adhesion and migration. We have synthesized a biocompatible, non-degradable, radiopaque, photopolymerizable polyvinyl alcohol (PVA) embolic material for in situ gelation. Evaluation of the material properties, including ...
Displacement by plasma of radiolabeled thrombin and radiolabeled thrombin-antithrombin III inactive complex from a heparinized surface (heparin-PVA) was measured and found to be significant. For example, 63% of the thrombin and 90% of the complex that could not be removed by PBS alone was displaced by heat defibrinated plasma. Preliminary characterization (molecular weight, antithrombin III content) suggests that the eluting product consists largely of thrombin-antithrombin III complex and post complex antithrombin III. Heparin polyvinyl alcohol (PVA) gel beads were prepared by acetal coupling of the heparin to PVA using glutaraldehyde with MgCl2 catalysis. Although permanently bound to the PVA (heparin removal rate was 1.67 × 10-2 mg/g gel⋅min), the heparin retained at least part of its activity in thrombin time, recalcification time, chromogenic substrate and AV shunt assays. Thus, heparin need not be lost from a surface to impart thromboresistance. Our results further suggest that the ...
A small nick is made in the skin, usually in the right groin (less than 1/8 of an inch), at the crease at the top of the leg. A tiny tube (catheter) is inserted into the artery at this level. Local anesthesia will be given so that this needle puncture is not painful. Thus, the only thing the patient should feel during the examination is the initial numbing and the remainder of the procedure should be painless.. Using x-ray guidance the radiologist will guide the catheter into the appropriate place within the uterine artery and perform the embolization.. The Interventional Radiologist will then slowly inject tiny particles (polyvinyl alcohol, gel foam, or Embosphere®) into the artery. These particles flow to the fibroid first and wedge in these vessels and remain there. After a few minutes the arteries are slowly blocked. The same procedure is repeated on the other side so that the blood flow is blocked from the right and left uterine arteries. Once the embolization is complete, an arterogram is ...
This research has investigated the use of pentablock copolymers and polyanhydride nanoparticles in combination to form a hydrogel matrix giving controlled and sustained release of model protein ovalbumin (OVA) for vaccine delivery applications. To investigate the influence of hydrogel composition on release of OVA, the weight percent of polyvinyl alcohol (PVA), form of OVA, and molecular weight of pentablock copolymer were varied. The weight percent of PVA was tested for 20% and 30%. Molecular weight of the pentablock copolymer was also varied giving a low molecular weight or high molecular weight copolymer. Lastly, OVA was incorporated into hydrogels either in a free form, encapsulated in polyanhydride nanoparticles, or a combination of the two. For all trials, the total OVA amount loaded was constant, and release curves of protein with time were observed for 4 days. Overall, these release curves confirmed gradual and controlled release of OVA. They also showed that the amount of OVA released from 20%
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In this investigation, single and hybrid immobilization techniques for whole cells of Pseudomonas sp. SA01 were employed to enhance phenol degradation rate. The single immobilization was achieved using alginate (2-4%) and pectin (3-5%) together with the combined immobilization systems which consisted of alginate-chitosan-alginate (ACA), polyvinyl alcohol (PVA)-alginate capsules. The freely suspended cellsof Pseudomonas sp. SA01 was able to degrade phenol in concentrations up to 1000 mg/L 84 h. The complete degradation of the same concentration of phenol by cells entrapped in alginate (3%), in hybrid immobilization system alginate-chitosan-alginate (ACA), and in PVA-alginate encapsulated cells were achieved as low as 30 h. However, the cells immobilized in pectin (5 %) could degrade the same concentration of phenol at 35 and 40 h respectively. The cell loading capacity is increased in PVA-alginate hybrid capsules owing to the reduction of cell leakage from the beads, resulted in higher activity ...
Acceptable Specimens:Stool in Parasitology Transport Kit (1 vial 10% formalin, 1 vial polyvinyl alcohol fixative). Stool should be added to each vial to bring liquid level up to Fill to Here line; approximately 5 mL of stool for each vial.. Collection Procedure:. Using a Parasitology Transport Kit, collect stool as described in instructions provided with each kit. (Swab or specimen contaminated with urine or water is not acceptable.). Note: 1. Do not collect stool if the patient has been ...
A new practical experiment involving silver and gold nanoparticle syntheses was introduced in an inorganic chemistry laboratory course for undergraduate students at the Institute of Chemistry, UNICAMP. The nanoparticles were synthesized by the reduction of silver nitrate and tetrachloroauric acid with sodium borohydride and sodium citrate in an aqueous medium. Stabilities of the suspensions were tested using several different reactants including sodium chloride, polyvinylpyrrolidone, polyvinyl alcohol and cistamine. Changes in optical properties were observed by electronic spectra and also by transmission electronic microscopy, which also yielded data for estimating particle size ...
Adhesives comprising microparticles of acrylate copolymers are formed from higher homologs of acrylates and methacrylates. By varying the type and amount of monomers used in the starting solution the tack level may be varied. Very high tack levels are achieved with compositions made from isodecyl acrylate and 2-ethylhexyl acrylate where acrylic acid, isobornyl acrylate and vinyl pyrrolidone are included in the starting mixture and where polyvinyl alcohol is used to avoid agglomeration.
A number of delivery systems have been developed for treating ocular diseases. Most ophthalmic drugs are delivered in solutions, but for compounds with limited solubility, a suspension form facilitates delivery. Properties of varying ocular routes of administration are outlined in Table 64-1. Several formulations prolong the time a drug remains on the surface of the eye. These include gels, ointments, solid inserts, soft contact lenses, and collagen shields. Ophthalmic gels (eg, pilocarpine 4% gel) release drugs by diffusion following erosion of soluble polymers. The polymers used include cellulosic ethers, polyvinyl alcohol, carbopol, polyacrylamide, polymethylvinyl ether-maleic anhydride, poloxamer 407, and pluronic acid. Ointments usually contain mineral oil and a petrolatum base and are helpful in delivering antibiotics, cycloplegic drugs, or miotic agents. Solid inserts, such as the ganciclovir intravitreal implant, provide a zero-order rate of delivery by steady-state diffusion, whereby ...
Meneghello, G., Ainsworth, B., Perera, S., Chaudhuri, J., Ellis, M. and De Bank, P., 2008. Effect of Polyvinyl Alcohol and Sodium Hypochlorite on Porosity and Hydrophilicity of PLGA Hollow Fibre Membrane Scaffolds. In: TERMIS: tissue engineering and regenerative medicine international society ...
hydroxyzine hydrochloride, lactose monohydrate, cellulose, microcrystalline, crospovidone, silicon dioxide, magnesium stearate, carnauba wax, polyvinyl alcohol, polyethylene glycols, titanium dioxide, talc, fd&amp;c yellow no.6, ferricoxide yellow, hypromelloses, ...
Wcam, 2002 no viagra generic cheap prescription. Sharp cutting edge, do the same procedure as well as clinical presentation is a fine pointed scissors with curved. Hemorrhage from femoral vessels, deep vein thrombosis papilloedema ocular palsies with diplopia, ptosis, slightblurring of vision night blindness (xn), conjunctival xerosis artificial tears (0.5 percent hydroxypropyl methyl cellulose or 0.2 percent hypromellose or polyvinyl alcohol (1.6%). (beaumont et al., adamts-12 deficiency: Can it cause chronic renal failure. The introduction of new cases, the ultrasound findings, mr urography will take place in mild and severe symptoms needing surgical intervention is indicated in children younger than 26 ng/ml. Delay extubation until the bladder to check the repair, divide the vein and vena cava; ( 2 ) occlude the suprapubic and urethral function to produce a metastatic tumor cells.570 other data, however, suggest that appropriate interventions may have even been implicated as the radius. If ...
In the early 20th century, many cosmetic breast prosthetic techniques and materials were used for implants; these included polyvinyl alcohol prostheses, paraffin injections, and injections of free silicone. All of these techniques and materials had notable drawbacks and for the most part were abandoned.
Properly formulated cosmetic compositions can stimulate the receptors to produce very positive pleasant effects. One of the oldest stimulants is 1menthol; it imparts a cooling sensation to the skin. Menthol and related terpenes do not really cool through the effect of latent cold. Actually they heighten the perception of cold in the nerve endings in the skin, so that the surface of skin feels cold. ; John Joseph (Mocksville, NC) Assignee(s): R. J. Reynolds Tobacco Company (Winston-Salem, NC) Patent Number: 6,692,835 Date filed: September 14, 2000 Abstract: Polyvinyl alcohol (PVOH) is used as a slip coating on a cigarette package innerwrap to prevent the innerwrap from sticking to the rollers of cigarette packaging machinery during processing of the innerwrap material. Cmd=Retrieve&db=pubmed&dopt=A bstract&list_uids=14982706 • Menthol: effects on nasal sensation of airflow and the drive to breathe. Author(s): Eccles R. Source: Curr Allergy Asthma Rep. 2003 May; 3(3): 210-4. Review. ...
1.7 fl.oz. 50ml 8.5 fl.oz. 250ml. ​. Active Ingredients. Ethanol, content ≥ 70% (V / V). ​. Active Ingredients. Deionized water, carbomer, glycerin, medical grade polyvinyl alcohol, essence, triethanolamine, sodium hydroxide, citric acid, etc.. ​. Warnings:. For external use only.. Flammable, keep away from heat and flame.. Do not use in ears, eyes or mouth.. Keep out pf reach of children. Children should be supervised when using this product.. Stop use and ask a doctor if redness or irritation develop and persist for more than 72 hours.. Directions: Apply a small amount into palms and spread on both hands. Rub into skin until dry.. ​. ​. Executive Standard: Q/JDNM 010-2020 ...
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Interdisciplinary Nanoscience Center - INANO-MBG, iNANO-huset, Interdisciplinary Nanoscience Center, Science and Technology, Aarhus ...
Polyvinyl acetate, PVA, PVAc, poly(ethenyl ethanoate), is a rubbery synthetic polymer with the formula (C4H6O2)n. It belongs to the polyvinyl esters family with
Otai Polyvinyl Chloride (PVC) waterproofing membrane is a type of new high macro-molecular waterproofing membrane by adding plasticizer , filler ,anti-oxidizer , ultraviolet light absorber and other auxiliaries with polyvinyl chloride resins as raw...
Item Name= VXB004075PVC Medium Duty Wheel Diameter= 75mm Wheel Width= 30mm Wheel Diameter= 3 Inch = 75mm Overall Height= 105mm Overall Height Inch= 4.134 Mounting Type= Top Plate Top Plate Size= 93mm x 62mm Hole distance= 73mm x 45mm Wheel Core= Polyvinyl Chloride Tire= Polyvinyl Chloride
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Chlorinated Polyvinyl Chloride (CPVC) is white or light yellow, non-toxic loose grain or powder. It is a thermoplastic produced by chlorination of polyvinyl chloride (PVC) resin. It is mainly used as ...
This specification covers polyvinyl chloride insulated conductor electric wires made with tin-coated copper conductors or silver-coated copper alloy conductors as specified in the applicable military specification sheet. The polyvinyl chloride insulation of these wires may be used alone or in combination with other insulating or protective materials ...
Polyvinyl Chloride Market - Global Industry Analysis and Opportunity Assessment, 2019-2029. A recent market study published by Future Market Insights on the polyvinyl chloride market includes global industry analysis for 2014-2018 and opportunity assessment for 2019-2029, and delivers a comprehensive assessment of the most important market dynamics
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used polyvinyl alcohol. In order to remove or recover the extracted solute, SIR particles can be regenerated using low pressure ...
... , also known as Vinalon, is a synthetic fiber produced from polyvinyl alcohol, using anthracite and limestone as raw ...
Poly(vinyl alcohol) (PVA, PVOH)Edit. Poly(vinyl alcohol) is one of the few biodegradable vinyl polymers that is soluble in ... Chiellini, Emo; Corti, Andrea; D'Antone, Salvatore; Solaro, Roberto (June 2003). "Biodegradation of poly (vinyl alcohol) based ...
ISBN 0-7872-2741-2. Cassassa, E. Z.; A. M. Sarquis; C. H. Van Dyke (January 1986). "The Gelation of Polyvinyl Alcohol with ... or Slime are common names referring to a rubbery polymer formed by cross-linking of polyvinyl alcohol (PVA) with a boron ... Flubber can be made by combining polyvinyl-acetate-based adhesives such as Elmer's Glue with baking soda, borax, and ( ...
polyvinyl alcohol (PVA) - These are permanent agents. They are tiny balls 50-1200 um in size. The particles are not meant to ... The alcohol does need some time to denature proteins of the endothelium and activate the coagulation system to cause a blood ... It contains 2% benzyl alcohol, so it is less painful than ethanol. However it does cause hemolysis and kidney failure in large ...
Poly(vinyl alcohol) is one of the few biodegradable vinyl polymers that is soluble in water. Due to its solubility in water (an ... Chiellini, Emo; Corti, Andrea; D'Antone, Salvatore; Solaro, Roberto (June 2003). "Biodegradation of poly (vinyl alcohol) based ...
Poly(vinyl chloride) (PVC) 80 176[25] Poly(vinyl alcohol) (PVA) 85 185[25] ...
Peppas was the first to develop novel toxic-free poly(vinyl alcohol) gels by the freezing-thawing technique in 1975. These gels ... Peppas, N.A.; Benner Jr, R.E. (1980). "Method of intracordal injection and gelation of poly (vinyl alcohol) solution in vocal ... Mongia, N.K.; Anseth, K.S.; Peppas, N.A. (1996). "Mucoadhesive Poly(vinyl alcohol) Hydrogels Produced by Freezing/Thawing ... Retrieved 2008-12-31.CS1 maint: archived copy as title (link) Peppas, N.A. (1975). "Turbidimetric studies of aqueous poly(vinyl ...
Merrill, EW; Salzman, EW; Wong, PS; Ashford, TP; Brown, A. H.; Austen, WG (1970). "Polyvinyl alcohol--- heparin hydrogel "G"". ... He developed new heparinized biomedical surfaces based on poly (vinyl alcohol) and hydroxylated SBS-block copolymer systems ( ... Peppas, Nikolaos A.; Merrill, Edward W. (1977). "Development of semicrystalline poly(vinyl alcohol) hydrogels for biomedical ...
Poly(vinyl alcohol) in aqueous solution is used for cigarette adhesives. Permeability is defined as the measure of the volume ... The tip paper may be covered with polyvinyl alcohol. Cigar or cigarillo casing paper holds the chopped tobacco together and ... 1-8, doi:10.1002/14356007.a26_163 Manfred L. Hallensleben (2007), "Polyvinyl Compounds, Others", Ullmann's Encyclopedia of ... "Vinyl Alcohol Polymers", Kirk-Othmer Encyclopedia of Chemical Technology (5th ed.), Wiley, p. 26, doi:10.1002/ ...
"Micropatterning of silver nanoclusters embedded in polyvinyl alcohol films". Optics Letters. 41 (15): 3627-3630. Bibcode: ...
The tip paper may be coated with polyvinyl alcohol. The tobacco industry determined that the illusion of filtration was more ... 1-70, doi:10.1002/14356007.a01_221 F. L. Marten (2002), "Vinyl Alcohol Polymers", Kirk-Othmer Encyclopedia of Chemical ...
Chung, Jinwook; Kim, Seungjin; Choi, Kwangkeun; Kim, Jong-Oh (17 June 2015). "Degradation of polyvinyl alcohol in textile waste ... Microbacterium barkeri has the ability to degrade polyvinyl alcohol. Parte, A.C. "Microbacterium". LPSN. "Microbacterium ...
Poly(vinyl alcohol) (PVA) hydrogels were used in this study. It was difficult to meet the mechanical properties of articular ... Bray JC, Merrill EW (September 1973). "Poly(vinyl alcohol) hydrogels for synthetic articular cartilage material". Journal of ...
In another study, porous cellulose nanocrystals and poly(vinyl alcohol) CNC/PVA nanocomposite films with a thickness of 25−70 ... "Biosensors Based on Porous Cellulose Nanocrystal-Poly(vinyl Alcohol) Scaffolds". ACS Applied Materials & Interfaces. 6 (15): ...
Polyvinyl alcohol particles are then injected into the prostatic artery. They function by causing embolization (blockage of the ... "Relief of benign prostatic hyperplasia-related bladder outlet obstruction after transarterial polyvinyl alcohol prostate ...
A typical formulation is composed of 25% polyethylene glycol (PEG) and 75% polyvinyl alcohol (PVA); where the vinyl alcohol ... Polyethylene glycol-polyvinyl alcohol (PEG-PVA) brand name Kollicoat IR (BASF) is a multifunctional excipient[citation needed] ... Polyvinylpolypyrrolidone Kevin Williams (November 30, 2015). "Polyethylene Glycol-Polyvinyl Alcohol Graft Copolymer: A Peroxide ...
Polyvinyl alcohol Vinyl propionate "Public Health Statement for Vinyl Acetate". Agency for Toxic Substances and Disease ... Vinyl acetate is the acetate ester of vinyl alcohol. Since vinyl alcohol is highly unstable (with respect to acetaldehyde), the ... This colorless liquid is the precursor to polyvinyl acetate, an important industrial polymer. The worldwide production capacity ... polyvinyl chloride acetate (PVCA), and polyvinylpyrrolidone (Vp/Va Copolymer, used in hair gels). Due to the instability of the ...
H-sheet is a polyvinyl alcohol (PVA) polymer impregnated with iodine. During manufacture, the PVA polymer chains are stretched ...
One of the most common suspending agents is polyvinyl alcohol (PVA). Usually, the monomer conversion is complete unlike in bulk ... This process is used in the production of many commercial resins, including polyvinyl chloride (PVC), a widely used plastic, ...
Vinyl acetate polymers include polyvinyl acetate, polyvinyl alcohol and polyvinyl acetal; all come from reaction products of ... Additionally, polyvinyl acetate mixtures tend to degrade in storage and release acetic acid, which in some cases can corrode ... One of the major advantages of B-72 as a consolidate is that it is stronger and harder than polyvinyl acetate without being ... The mixture consists of polyvinyl acetate (PVAC) AYAC, ethylene acrylic acid (EAA) copolymers A-C 540, and 580, antioxidants ...
The first synthetic absorbable was based on polyvinyl alcohol in 1931. Polyesters were developed in the 1950s, and later the ...
Wu, Ting Kai; Sheer, M. Lana (1977). "Carbon-13 NMR Determination of Pentad Tacticity of Poly(vinyl alcohol)". Macromolecules. ... Polymers that are formed by free-radical mechanisms such as polyvinyl chloride are usually atactic. Due to their random nature ...
Cite journal requires ,journal= (help) Ji Guobiao; Shi Meiwu; Ye Guangdou (1999). "High Strength Polyvinyl Alcohol Fiber ... Cite journal requires ,journal= (help) "Vliestoffe: Polyvinyl Alkohol Faser". German: WILEY-VCH. 2001. Cite journal requires , ...
Beltman, H.; Lyklema, J. (1974). "Rheological monitoring of the formation of polyvinyl alcohol-Congo Red gels". Faraday Discuss ... "Mechanical and electrical relaxation distribution functions of two compositions of polyvinyl chloride and dimethylthianthrene ...
The device used an electrolyte made of potassium hydroxide in polyvinyl alcohol. The device can also be used as a ...
Preparations can contain carboxymethyl cellulose, polyvinyl alcohol, hydroxypropyl methylcellulose (a.k.a. HPMC or hypromellose ... polyvinyl alcohol-based tears. Sjögren's syndrome "Keratoconjunctivitis, Sicca". eMedicine. WebMD, Inc. 2006-04-21. Archived ...
"Role of Poly(vinyl alcohol) in the Crystal Growth of Ammonium Perchlorate". Vargeese, Anuj A.; Joshi, Satyawati S.; ...
The most commonly used membranes were polyvinyl alcohol, porous hydrophilic membranes etc. A defined microbial consortium can ...
Pure polyvinyl chloride is a white, brittle solid. It is insoluble in alcohol but slightly soluble in tetrahydrofuran. ... Polyvinyl chloride (colloquial: polyvinyl, vinyl;[6] abbreviated: PVC) is the world's third-most widely produced synthetic ... PolyVinyl (Poly Vinyl Chloride) in Construction. Azom.com (26 October 2001). Retrieved on 6 October 2011. ... Wikimedia Commons has media related to Polyvinyl chloride.. *The European PVC Portal (European Council of Vinyl Manufacturers) ...
Distilled alcoholic beverage purification[edit]. See also: Lincoln County Process. Activated carbon filters (AC filters) can be ... Youssef A.M.; Abdelbary E.M.; Samra S.E.; Dowidar A.M. (1991). "Surface-properties of carbons obtained from polyvinyl-chloride ... impure vodka through an activated carbon filter at the proper flow rate will result in vodka with an identical alcohol content ...
... impregnated with furfural alcohol in a vacuum chamber, and cured-pyrolized to convert the furfural alcohol to carbon. To ... Polyvinyl chloride (PVC) is widely used, inexpensive, and annual production quantities are large. It lends itself to a vast ... Plastics which have been around, and which are in current widespread use, include polyethylene, polypropylene, polyvinyl ...
Plastics: High-density polyethylene (HDPE) is compatible but polyvinyl chloride (PVC) is slowly degraded.[5] Polystyrene is ... as it is the cheapest alcohol available, though ethanol can be used to produce an ethyl ester (commonly referred to as Fatty ... with an alcohol producing fatty acid esters. ...
113,0 113,1 113,2 Adams K. E., Rans T. S. (December 2013)։ «Adverse reactions to alcohol and alcoholic beverages.»։ Annals of ... Jaakkola J.J., Knight T.L. (July 2008)։ «The role of exposure to phthalates from polyvinyl chloride products in the development ...
Ethanol (alcohol) -. *Ethyl maltol - aroma arttırıcı. *Ethyl methyl cellulose - kıvam arttırıcı, bitkisel sakız, emülgatör ... Poly vinyl pyrrolidone -. *Polydextrose - hümektasyon (humectant). *Polyethylene glycol 8000 - köpürme engelleyici. * ...
The hydroformylation (oxo reaction) of ethylene results in propionaldehyde, a precursor to propionic acid and n-propyl alcohol. ... Some products derived from this group are polyvinyl chloride, trichloroethylene, perchloroethylene, methyl chloroform, ...
... impregnated with furfural alcohol in a vacuum chamber, and cured/pyrolized to convert the furfural alcohol to carbon. In order ... polyvinyl chloride, polystyrene, nylons, polyesters, acrylics, polyurethane, and polycarbonates, and silicon-based silicones. ...
PVA - polyvinyl alcohol, not polyvinylacetate which is used in adhesives such as wood glue. PVA monomers are dispersed in the ...
vinyl chloride - monomer for polyvinyl chloride *polyvinyl chloride (PVC) - type of plastic used for piping, tubing, other ... isopropyl alcohol - 2-propanol; often used as a solvent or rubbing alcohol ... Polyvinyl chloride (PVC). Polyethylene (PE) Polyethylene terephthalate (PET). Polyol. Polypropylene (PP). Polystyrene (PS). ... solvents - liquids used for dissolving materials; examples often made from petrochemicals include ethanol, isopropyl alcohol, ...
... polyvinyl chloride (PVC), stainless steel, and fiberglass reinforced plastic (FRP, with a resistant liner).[13] ...
The specimen is embedded in a gel like medium called OCT and consisting of poly ethylene glycol and polyvinyl alcohol; this ...
It was found that an easily oxidized alcohol was an essential ingredient. A thin layer of about 10-15 µm was applied, which ... This used zinc tetroxychromate dispersed in a solution of polyvinyl butyral. An 8% solution of phosphoric acid in solvent was ...
Alcohol (causing head and neck cancers). *Other ionizing radiation (X-rays, gamma rays, etc.) ... Production of polyvinyl chloride. *Adhesive for plastics. *Former use in pressurized containers ...
The tip paper may be coated with polyvinyl alcohol.[15] ... F. L. Marten (2002), "Vinyl Alcohol Polymers", Kirk-Othmer ...
Precursor for boric acid, a tackifier ingredient in polyvinyl acetate, polyvinyl alcohol based adhesives ... can be made by cross-linking polyvinyl alcohol with borax. Making flubber from polyvinyl acetate-based glues, such as Elmer's ...
Polyurethane foams Polyvinyl acetate Polyvinyl alcohol Polyvinyl chloride Polyvinyl pyrrolidone Ponceau SX Potassium bis(2- ...
... is also used as an alternative to polyvinyl chloride (PVC) as insulation for electrical cables for LSZH cable in ... Also it is recommended to clean with mineral spirits or similar alcohol prior to gluing to remove any oils or other ...
... polyvinyl alcohol or chitosan can be used to impede ice crystal growth along with traditional small molecule cryoprotectants.[2 ...
Almost half of acetic acid production is consumed in the production of vinyl acetate, precursor to polyvinyl alcohol, which is ... "Acetate Causes Alcohol Hangover Headache in Rats". PLoS ONE. 5 (12): e15963. Bibcode:2010PLoSO...515963M. doi:10.1371/journal. ...
Alcohol (causing head and neck cancers). *Other ionizing radiation (X-rays, gamma rays, etc.) ... Production of polyvinyl chloride. Shift work that involves circadian disruption[30]. *Breast ...
... polyvinyl alcohol-formaldehyde polymer sponge), a polyethylene sac with Ivalon, polyether foam sponge (Etheron), polyethylene ...
From December 1935 to August 1936 the staff at the museum in Brussels treated the problem with a combination of alcohol, ... hide glue and gelatine were removed and impregnated with polyvinyl acetate and cyanoacrylate and epoxy glues.[33] Modern ... This combination was intended to simultaneously penetrate the fossils (with alcohol), prevent the development of mold (with ...
The first synthetic absorbable was based on polyvinyl alcohol in 1931. Polyesters were developed in the 1950s, and later the ...
Distilled alcoholic beverage purificationEdit. See also: Lincoln County Process. Activated carbon filters (AC filters) can be ... Youssef A.M.; Abdelbary E.M.; Samra S.E.; Dowidar A.M. (1991). "Surface-properties of carbons obtained from polyvinyl-chloride ... or alcohol. Activated carbon will not prevent these chemicals from being absorbed into the human body.[6] ... impure vodka through an activated carbon filter at the proper flow rate will result in vodka with an identical alcohol content ...
... about two-thirds of them organic chemicals such as polyvinyl chloride, and many intermediates for the production of plastics ... vinyl chloride and its polymer polyvinyl chloride (PVC), aluminium trichloride for catalysis, the chlorides of magnesium, ...
Most animal glues are soluble in water, useful for joints which may at some time need to be separated.[21] Alcohol is sometimes ... Animal glue was the most common woodworking glue for thousands of years until the advent of synthetic glues, such as polyvinyl ...
Sometimes organic binders such as polyvinyl alcohol are added to hold the green body together; these burn out during the firing ...
Type 3 (polyvinyl chloride) includes items such as shampoo bottles, shower curtains, hula hoops, credit cards, wire jacketing, ... For some polymers, it is possible to convert them back into monomers, for example, PET can be treated with an alcohol and a ...
Polyvinyl acetals: Polyvinyl acetals are prepared by reacting aldehydes with polyvinyl alcohol. Polyvinyl butyral (PVB) and ... Polyvinyl nitrate. References[edit]. *^ "Poly(vinyl alcohol)_msds".. .mw-parser-output cite.citation{font-style:inherit}.mw- ... Polyvinyl alcohol is used as an emulsion polymerization aid, as protective colloid, to make polyvinyl acetate dispersions. This ... Preparation of polyvinyl butyral is the largest use for polyvinyl alcohol in the U.S. and Western Europe. ...
... polyvinyl alcohol (en-gb); Պոլիվինիլային սպիրտ (hy); 聚乙烯醇 (zh); പോളി വൈനൈൽ ആൽക്കഹോൾ (ml); Polyvinyl alcohol (en-ca); ポリビニルアルコール ... Polyvinylalcohol (nl); 폴리비닐 알코올 (ko); पोलिभिनाइल अल्कोहल (hi); alcohol de polivinil (ca); Polyvinyylialkoholi (fi); polyvinyl ... Media in category "Polyvinyl alcohol". The following 12 files are in this category, out of 12 total. ... Polyvinyl alcohol, PVA (en); polyvinylalkohol (nn); PVOH (pt-br); PVA, PVAL (cs) ...
Sno tears eye drops contain the active ingredient polyvinyl alcohol, which is a type of medicine known as an eye lubricant. It ... Sno tears (polyvinyl alcohol). Sno tears eye drops contain the active ingredient polyvinyl alcohol, which is a type of medicine ... Polyvinyl alcohol works by decreasing the surface tension of the tears so that they spread more easily over the surface of the ... Sno tears eye drops contain the active ingredient polyvinyl alcohol, which is a type of medicine known as an eye lubricant. It ...
The United States International Trade Commission is an independent, nonpartisan, quasi-judicial federal agency that fulfills a range of trade-related mandates. We provide high-quality, leading-edge analysis of international trade issues to the President and the Congress. The Commission is a highly regarded forum for the adjudication of intellectual property and trade disputes.
Plasticizer containing polyvinyl alcohol granules. US4440830 *. Oct 28, 1982. Apr 3, 1984. Wempe Lawrence K. Substrates coated ... Plasticizer-containing polyvinyl alcohol granules. US5645751 *. Jan 26, 1995. Jul 8, 1997. Amway Corporation. Fabric finishing ... The term polyvinyl alcohol" appearing hereinafter is employed in its accepted trade sense and denotes the water-soluble types ... Polyvinyl alcohol compositions containing a plasticizer mixture. US4323492 *. Dec 1, 1980. Apr 6, 1982. Hoechst ...
... a polymer of vinyl alcohol; especially : a thermoplastic resin that is soluble or swells in water, that if obtained by complete ... and in making molded and extruded products and polyvinyl acetals. ... hydrolysis of polyvinyl acetate has the formula [-CH2CH(OH)-]x ... Share polyvinyl alcohol. Post the Definition of polyvinyl alcohol to Facebook Share the Definition of polyvinyl alcohol on ... Resources for polyvinyl alcohol. Time Traveler: Explore other words from the year polyvinyl alcohol first appeared Time ...
In enzymology, a polyvinyl-alcohol oxidase (EC 1.1.3.30) is an enzyme that catalyzes the chemical reaction polyvinyl alcohol + ... oxidized polyvinyl alcohol + H2O2 Thus, the two substrates of this enzyme are polyvinyl alcohol and O2, whereas its two ... polyvinyl alcohol, and PVA oxidase. Shimao M, Nishimura Y, Kato N, Sakazawa C (1985). "Localization of Polyvinyl Alcohol ... The systematic name of this enzyme class is polyvinyl-alcohol:oxygen oxidoreductase. Other names in common use include ...
Polyvinyl alcohol has not been evaluated previously by the Committee. Polyvinyl alcohol (synonyms, vinyl alcohol polymer, PVA, ... Mean intake of polyvinyl alcohol: all respondents (g/person per day). Polyvinyl alcohol intake: consumers only (g/person per ... Polyvinyl alcohol and preparations containing polyvinyl alcohol were not genotoxic in a range of studies in vitro and in vivo ( ... absorption of polyvinyl alcohol administered by this route was greater than that of polyvinyl alcohol administered orally. The ...
View information & documentation regarding Polyvinyl alcohol 5-88, including CAS, MSDS & more. ... Sigma-Aldrich offers a number of Polyvinyl alcohol 5-88 products. ...
A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer ... The Polyvinyl Alcohol Polymer. Polyvinyl alcohol polymers suitable for use in this invention are polyvinyl alcohol homopolymers ... A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer ... A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer ...
This relates to partially acetalized polyvinyl alcohol embolization particles suitable for implanting in the human body, to ... Polyvinyl alcohol particles have been used to embolize various sites for a number of years. See, Barr et al, "Polyvinyl Alcohol ... with the polyvinyl alcohol reactant.. The polyvinyl alcohol reactant may have a viscosity average molecular weight in a range ... Microspheric embolic materials having a dual structure of poly(vinyl acetate) core and poly(vinyl alcohol) shell and method for ...
... Abdullah Uzum,1 Taiki Ashikaga,1 Takuma Noguchi,1 ...
... and polyvinyl alcohol (PVA) of different proportions (considering chitosan as the main component) were prepared. The ... Preparation and Characterization of Chitosan/Polyvinyl Alcohol Blends-A Rheological Study. Esam A. El-Hefian,1 Mohamed Mahmoud ... Preparation and Characterization of Chitosan/Polyvinyl Alcohol Blends-A Rheological Study,. Journal of Chemistry,. vol. 7. ,. ... Blends of chitosan (CS) and polyvinyl alcohol (PVA) of different proportions (considering chitosan as the main component) were ...
Synonym: Ethenol homopolymer Formula: (C2H5O)n CAS: 9002-89-5 Notes: Used in the preparation of slime (4% solution) and to quiet protozoa (14% solution) Storage Code: Green general chemical storage
... of internal friction and temperature variation in the frequency of free damped torsional vibrations excited in a polyvinyl ... alcohol (PVA) sample in the temperature range from -150 to 0°C... ... Lomovskaya, N. A. Abaturova, D. M. Sakov, and V. A. Lomovskoi, "Relaxation processes in a polyvinyl alcohol-water system," ... Lomovskaya, and O. A. Khlebnikova, "Internal-friction spectra of poly (vinyl alcohol) with various molecular masses," Polymer ...
Gels formed from commercially available polyvinyl alcohol (PVA) and 1,4-benzene diboronic acid (BdBA) in DMSO absorb NaOH ... Polyvinyl alcohol-boronate gel for sodium hydroxide extraction G. M. Peters, X. Chi, C. Brockman and J. L. Sessler, Chem. ... Gels formed from commercially available polyvinyl alcohol (PVA) and 1,4-benzene diboronic acid (BdBA) in DMSO absorb NaOH ...
Synthesis of Silver Nanoparticles in Poly(vinyl alcohol) Matrix in Solution and Thin Films Through Laser Irradiation ... results on the synthesis of silver nanoparticles in solution and thin films using silver nitrate and poly vinyl alcohol (PVA) ...
Polyvinyl acetals: Polyvinyl acetals are prepared by reacting aldehydes with polyvinyl alcohol. Polyvinyl butyral (PVB) and ... See more specific polyvinyl alcohol uses. The North Korean-manufacture fiber Vinalon is produced from polyvinyl alcohol. ... Polyvinyl alcohol is the raw material to make other polymers like:. *Polyvinyl nitrate (PVN): It is an ester of nitric acid and ... Preparation of polyvinyl butyral is the largest use for polyvinyl alcohol in the U.S. and Western Europe. ...
Bone regeneration potential of optimized genipin cross-linked polyvinyl alcohol-gelatin (PVA20) hydrogels was assessed by ... Polyvinyl alcohol gelatin hydrogels were fabricated using genipin as a crosslinking agent for bone regeneration application. ... "Genipin Cross-Linked Polyvinyl Alcohol-Gelatin Hydrogel for Bone Regeneration" written by Thi-Hiep Nguyen, Reiza Ventura, Young ... Multi-scale investigation of gelatin/poly(vinyl alcohol) interactions in water. Colloids and Surfaces A: Physicochemical and ...
... functionalized with quaternary ammonium groups are prepared from polyvinyl alcohol for alkaline polymer electrolyte fuel cell ( ... Shin M-S, Byun Y-J, Choi Y-W, Kang M-S, Park J-S (2014) On-site crosslinked quaternized poly(vinyl alcohol) as ionomer binder ... Fu J, Qiao J, Lv H, Ma J, Yuan X-Z, Wang H (2010) Alkali doped poly(vinyl alcohol) (PVA) for anion-exchange membrane fuel cells ... Liao G-M, Yang C-C, Hu C-C, Pai Y-L, Lue SJ (2015) Novel quaternized polyvinyl alcohol/quaternized chitosan nano-composite as ...
Poly(vinyl alcohol), Cellulose nanocrystals, Rheology, Nanocomposite, Cellulose, Viscoelasticity, Poly(vinyl alcohol), ... Rheological behavior of highly loaded cellulose nanocrystal/poly(vinyl alcohol) composite suspensions. Cellulose. 23(5): 3001- ... poly(vinyl alcohol) (PVA). Specifically, small amplitude oscillatory shear measurements were performed on neat PVA solutions ...
polyvinyl alcohol solution thermal properties. polyvinyl alcohol solution thermal properties. silebi66 (Chemical). (OP) ... polyvinyl alcohol) in water ? Thank you so much. ...
Reports emphasize developments in process technology for Polyvinyl Acetate and Polyvinyl Alcohol that have potential ... Polyvinyl alcohol by hydrolysis of polyvinyl acetate.. Each of the three PVAc processes was evaluated at a plant capacity of 50 ... This report is an evaluation of selected processes for the production of polyvinyl acetate (PVAc) and polyvinyl alcohol (PVAL) ...
Blending poly(vinyl alcohol) (PVA) with a potentially useful natural biopolymers such as hydroxypropyl cellulose (HPC) seems to ... Brunelli, D.D., Barboza, V.C., Joekes, I. and Atvars, T.D.Z. (1998) Mapping phases of poly(vinyl alcohol) and poly(vinyl ... Hyon, S.H., Cha, W.I., Ikada, Y., Kita, M., Ogura, Y. and Honda, Y. (1994) Poly(vinyl alcohol) hydrogels as soft contact lens ... Kim, J.H., Kim, J.Y., Lee, Y.M. and Kim, K.Y. (1992) Properties and swelling characteristics of cross-linked poly(vinyl alcohol ...
Processing and Applications Review Report provides a concise introduction to polyvinyl alcohol - the material itself, the ... Polyvinyl Alcohol: Materials, Processing and Applications Review Report provides a concise introduction to polyvinyl alcohol - ... One material that has been considered for mass application has been polyvinyl alcohol (PVOH). To date, the use of this material ...
... vinyl alcohol) for your research needs. Find product specific information including CAS, MSDS, protocols and references. ... Polyvinyl alcohol is normally prepared by hydrolysis of the acetate, CH3(C=O)O, groups of polyvinylacetate, to leave behind the ... Product P8136, poly(vinyl alcohol), should be solubilized in cold water with adequate agitation to ensure complete wetting of ... What is the best way to prepare a solution of Product P8136, poly(vinyl alcohol)? ...
フルルビプロフェンの PVA エマルションゲル坐剤からの直腸吸収 [in Japanese] Rectal Absorption of Flurbiprofen from Poly(vinyl alcohol) Emulsion Gel ... Anomalous increase of the elastic modulus od frozen poly (vinyl alcohol) gels WATASE M. ... Rectal Absorption of Insulin in Rat from Poly(Vinylalcohol) Gel Suppositories Containing Insulin and Sodium EDTA [in Japanese] ... Preparation of Freeze-Thaw Poly (vinylalcohol) Emulsion Gel Suppository [in Japanese] TAKAMURA Akira , ISHII Fumiyoshi ...
Latest Adhesive Polyvinyl Alcohol from Quality Vinyl Chloride Vinyl Acetate Copolymer Resin, HENAN GP CHEMICALS CO., LTD - a ... Adhesive Polyvinyl Alcohol Polyvinyl Alcohol. Henan GP Chemicals Co.,Ltd is one of the leading polyvinyl alcohol suppliers and ... Hot Tags: polyvinyl alcohol China, manufacturer, suppliers, factory, buy, bulk, pva, poly(vinyl alcohol) ... Henan GP Chemicals Co.,Ltd is one of the leading polyvinyl alcohol suppliers and also a professional such manufacturer in China ...
  • Poly(vinyl alcohol) ( PVOH , PVA , or PVAl ) is a water - soluble synthetic polymer . (wikipedia.org)
  • Lomovskaya, and O. A. Khlebnikova, "Internal-friction spectra of poly (vinyl alcohol) with various molecular masses," Polymer Sci. (springer.com)
  • Synthesis of Silver Nanoparticles in Poly(vinyl alcohol) Matrix i. (ingentaconnect.com)
  • Here we communicate our experimental results on the synthesis of silver nanoparticles in solution and thin films using silver nitrate and poly vinyl alcohol (PVA) mixture at different concentrations and different laser irradiations. (ingentaconnect.com)
  • Therefore, the objective of this research is to characterize the viscoelastic behavior of aqueous nanocomposite suspensions containing cellulose nanocrystals (CNCs) and a water-soluble polymer, poly(vinyl alcohol) (PVA). (usda.gov)
  • Blending poly(vinyl alcohol) (PVA) with a potentially useful natural biopolymers such as hydroxypropyl cellulose (HPC) seems to be an interesting way of preparing a polymeric blends. (scirp.org)
  • Prichard, G.J. (1970) Poly(vinyl alcohol): Basis principles and uses. (scirp.org)
  • Brunelli, D.D., Barboza, V.C., Joekes, I. and Atvars, T.D.Z. (1998) Mapping phases of poly(vinyl alcohol) and poly(vinyl acetate) blends by Ft-Ir microspectroscopy and optical fluorescence microscopy. (scirp.org)
  • Kim, J.H., Kim, J.Y., Lee, Y.M. and Kim, K.Y. (1992) Properties and swelling characteristics of cross-linked poly(vinyl alcohol)/chitosan blend membrane. (scirp.org)
  • Peppas, N.P. and Merril, E.W. (1977) Development of semicrystalline poly(vinyl alcohol) hydrogels for biomedical application. (scirp.org)
  • El-Zaher, N.A. and Osiris, W.G. (2005) Thermal and structural properties of poly(vinyl alcohol) doped with hydroxypropyl cellulose. (scirp.org)
  • What is the best way to prepare a solution of Product P8136, poly(vinyl alcohol)? (sigmaaldrich.com)
  • Product P8136, poly(vinyl alcohol), should be solubilized in cold water with adequate agitation to ensure complete wetting of the particles. (sigmaaldrich.com)
  • The water stability of electrospun poly(vinyl alcohol) (PVA) nanofibres was improved significantly by annealing with poly(acrylic acid) (PAA). (degruyter.com)
  • Thereafter, the composite hydrogels of poly(vinyl alcohol) (PVA) and different content of the oxidized polysaccharides were prepared by the freezing/thawing method. (mdpi.com)
  • Factory supply and free sample PVA/Poly(vinyl alcohol ) cas 9002-89-5 1,Brief Introduction of Poly(vinyl alcohol ) CAS NO 9002-89-5: Product name: Poly(vinyl alcohol ) Other names: Polydesis;Polysizer 173;Polyvinol;Polyviol;Polyviol. (bushorchimp.com)
  • Poly(vinyl alcohol), 98.0%-98.8% hydrolyzed, M.W. approx. (fishersci.com)
  • On the basis of application, the market is segmented as ethylene vinyl acetate, ethylene vinyl alcohol, poly vinyl acetate, poly vinyl alcohol and others. (sbwire.com)
  • This work reports a study on the effects of different types and aspect ratios of cellulose nanocrystals (CNCs) on properties of poly (vinyl alcohol) (PVA) composite fibers. (usda.gov)
  • In this study, cellulose nanocrystals/zinc oxide (CNCs/ZnO) nanocomposites were dispersed as bifunctional nano-sized fillers into poly(vinyl alcohol) (PVA) and chitosan (Cs) blend by a solvent casting method to prepare PVA/Cs/CNCs/ZnO bio-nanocomposites films. (mdpi.com)
  • In this work, we investigated the H-bonding structure and physical properties of molten poly(vinyl alcohol-\textit{co}-vinyl acetate) with different monomer sequences to clarify the effect of the sequence distribution. (aps.org)
  • Assessment of Poly (vinyl alcohol) Coated Flutamide Nanoparticulates and their Efficacy on Prostate Cancer Cells. (amrita.edu)
  • Poly (vinyl alcohol) (PVA) coated flutamide nanoparticles (PVA FLT NPs) were formulated by nanoprecipitation method and characterized by DLS, TEM, FTIR, Drug release profile and biological assays. (amrita.edu)
  • In this article we report on the preparation of polymer composites from poly(vinyl alcohol), cattle horn meal and glycerol, which is the byproduct of biodiesel production. (vdu.lt)
  • To overcome this, it is blended with Poly-vinyl Alcohol (PVA), which is a synthetic polymer but biodegradable and biologically safe. (omicsonline.org)
  • Poly vinyl alcohol is purchased from Loba Chemie Pvt. (omicsonline.org)
  • The biodegradable composite films were prepared from corn stalk microcrystalline cellulose as filler and poly(vinyl alcohol)(PVA) as polymeric matrix. (scientific.net)
  • The aim of this paper to present the behaviour of the poly(vinyl alcohol) hydrogels [PVA-HG] in sodium and potassium chlorides aqueous solutions, due to their interactions. (ad-astra.ro)
  • Polyvinyl alcohol is used as an emulsion polymerization aid, as protective colloid, to make polyvinyl acetate dispersions. (wikipedia.org)
  • The term polyvinyl alcohol" appearing hereinafter is employed in its accepted trade sense and denotes the water-soluble types of partially saponified and fully saponified polyvinyl acetate. (google.com)
  • Polyvinyl alcohol is a synthetic resin that is prepared by polymerization of vinyl acetate, followed by partial hydrolysis of the resulting ester in the presence of an alkaline catalyst. (inchem.org)
  • The number of acetate groups in polyvinyl alcohol is determined by the degree of hydrolysis (86.5 89.0% hydrolysis for this food additive specification). (inchem.org)
  • The primary raw material used in the manufacture of polyvinyl alcohol is vinyl acetate monomer dissolved in methanol. (inchem.org)
  • Its largest application in China is its use as a protective colloid to make polyvinyl acetate dispersions. (wikipedia.org)
  • Instead, PVA is prepared by hydrolysis of polyvinyl acetate, or sometimes other vinyl ester-derived polymers with formate or chloroacetate groups instead of acetate. (wikipedia.org)
  • This report is an evaluation of selected processes for the production of polyvinyl acetate (PVAc) and polyvinyl alcohol (PVAL) from vinyl acetate monomer (VAM). (ihs.com)
  • Polyvinyl alcohol by hydrolysis of polyvinyl acetate. (ihs.com)
  • Polyvinyl alcohol is normally prepared by hydrolysis of the acetate, CH3(C=O)O, groups of polyvinylacetate, to leave behind the polyvinyl backbone with the OH groups. (sigmaaldrich.com)
  • A thermoplastic , water-soluble polymer derived from the hydrolysis (the splitting of a compound into separate compounds through chemical reaction with water) of polyvinyl acetate , used as a resin in printing inks. (printwiki.org)
  • In this research, polyvinyl alcohol nanospheres loaded by betamethasone acetate were prepared by oil in water emulsion method after which they were exposed to 1, 2 and 4 cycles of freeze-thawing (F-T) process including 24 hours freezing cycle at -25 °C and 24 hours thawing at ambient temperature. (scientific.net)
  • Retinyl acetate (RA) was effectively incorporated into nano-fibers of polyvinyl alcohol (PVA) at 10% (w/w) of PVA in order to develop encapsulating for prolong shelf-life and thermal stability assisting by β-cyclodextrin inclusion complex (β-CD-IC). (omicsonline.org)
  • Polyvinyl Alcohol Market Research Report- Forecast to 2023 Polyvinyl Alcohol Market - Overview Polyvinyl Alcohol (PVA) is produced by polymerization of vinyl acetate monomer followed by hydrolysis. (issuu.com)
  • Polyvinyl alcohol (synonyms, vinyl alcohol polymer, PVA, ethenol homopolymer) is a water-soluble synthetic resin, prepared by the polymerization of vinyl acetate, followed by partial or complete catalysed hydrolysis. (inchem.org)
  • The conversion of the polyvinyl esters is usually conducted by base-catalysed transesterification with ethanol: [CH2CH(OAc)]n + C2H5OH → [CH2CH(OH)]n + C2H5OAc The properties of the polymer are affected by the degree of transesterification. (wikipedia.org)
  • Mechanical, thermal, and microstructural analyses characterized solution-cast polyvinyl alcohol (PVA)/montmorillonite (MMT) nanocomposite properties over compositions ranging from the neat polymer to 25% volume fraction of MMT nanoclay. (hindawi.com)
  • A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer to provide a product which has low gas permeability and water absorptivity characteristics, and which has a melting point sufficiently below its decomposition point to allow melt. (google.com)
  • c) thereafter reacting said polyvinyl alcohol polymer with less than a stoichiometric amount of said functional polymer to provide a mixture of grafted and ungrafted polyvinyl alcohol polymers, said grafted polyvinyl alcohol polymer having less than all available hydroxyl groups reacted with said functional groups, said polyvinyl alcohol polymer comprising at least about 70 weight percent of said mixture. (google.com)
  • 2. The alloy of claim 1 wherein said polyvinyl alcohol polymer is between about 70 and 90 mole percent hydrolyzed prior to reaction with said functional polymer. (google.com)
  • We synthesized a photoluminescent conductor polymer composed of polyvinyl alcohol, which was doped with nickel chloride to decrease its resistivity (300 Ωcm) and benzalkonium chloride to obtain photoluminescence properties, when it is radiated with a green laser beam (532 nm). (spie.org)
  • Polyvinyl alcohol (PVA) is a synthetic polymer that has features such as being semi-crystalline, water soluble, biodegradable, and biocompatible with human tissues. (springer.com)
  • Gels based on polyvinyl alcohol (PVA) can be formed by repeated freezing and thawing of a solution of the polymer. (uwo.ca)
  • Preferred are polyvinyl alcohol/2-methylacrylamido-2 methyl propane sulfonic acid resins (PVOH/AMPS) which may be purchased commercially with relatively higher or relatively lower characteristic viscosity. (freepatentsonline.com)
  • One material that has been considered for mass application has been polyvinyl alcohol (PVOH). (azocleantech.com)
  • The permeability of dispersion barriers produced from polyvinyl alcohol (PVOH) and kaolin clay blends coated onto polymeric supports has been studied by employing two different measurement methods: the oxygen transmission rate (OTR) and the ambient oxygen ingress rate (AOIR). (diva-portal.org)
  • Celanese Corporation has sold its polyvinyl alcohol (PVOH) business to Sekisui Chemical Co., Ltd., a Japan-based company engaged in the manufacture of chemicals and resin processing. (alacrastore.com)
  • Polyvinyl butyral (PVB) and polyvinyl formal (PVF) are examples of this family of polymers. (wikipedia.org)
  • Polyvinyl alcohol is classified into grades of partially and fully hydrolysed polymers with different intended functional uses. (inchem.org)
  • Unlike most vinyl polymers, PVA is not prepared by polymerization of the corresponding monomer as the monomer, vinyl alcohol, is thermodynamically unstable with respect to its tautomer acetaldehyde. (wikipedia.org)
  • 12. The alloy of claim 1 which additionally contains a blending resin comprising an olefin homopolymer or copolymer compatible with said mixture of grafted and ungrafted polyvinyl alcohol polymers melt blended with said mixture. (google.com)
  • Global polyvinyl alcohol films market size was estimated at USD 229.6 billion in 2013. (grandviewresearch.com)
  • Based on product, the global polyvinyl alcohol fibers market has been bifurcated into filaments and staples. (clickpress.com)
  • In terms of application, the global polyvinyl alcohol fibers market has been segmented into cement additives, textiles, nonwovens, and others (including fishing nets, tire cords, and ropes). (clickpress.com)
  • The cement additives segment accounted for the leading share of the global polyvinyl alcohol fibers market in 2017. (clickpress.com)
  • Based on region, the global polyvinyl alcohol fibers market has been classified into North America, Europe, Asia Pacific, Middle East & Africa, and Latin America. (clickpress.com)
  • In terms of value and volume, Asia Pacific was the leading region of the global polyvinyl alcohol fibers market in 2017. (clickpress.com)
  • These two regions accounted for small share of the global polyvinyl alcohol fibers market in terms of demand in 2017. (clickpress.com)
  • The study includes drivers and restraints of the global polyvinyl alcohol fibers market. (clickpress.com)
  • Polyvinyl acetals are prepared by reacting aldehydes with polyvinyl alcohol. (wikipedia.org)
  • Medically, it may also used as the embolic agent in a Uterine Fibroid Embolectomy (UFE) Polyvinyl acetals are prepared by treating PVA with aldehydes. (wikipedia.org)
  • SRI Consulting CEH Report Polyvinyl Alcohol, published March 2007, abstract retrieved July 30, 2008. (wikipedia.org)
  • In this study, electrospun nanofibrous mats (ENMs) and casting films (CFs), comprising polyvinyl alcohol (PVA)/SPI, were prepared and compared. (springer.com)
  • Electrospinning technique was used to fabricate polyvinyl alcohol (PVA)-based magnetic biodegradable nanofibers. (osti.gov)
  • Thus to enhance its properties it is mixed with Polyvinyl alcohol (PVA), which is synthetic but non toxic, biodegradable and food safe. (omicsonline.org)
  • Sno tears eye drops contain the active ingredient polyvinyl alcohol, which is a type of medicine known as an eye lubricant. (netdoctor.co.uk)
  • What do I need to tell my doctor BEFORE I take Phenylephrine and Polyvinyl Alcohol Eye Drops? (drugs.com)
  • If you have an allergy to phenylephrine or any other part of this medicine ( phenylephrine and polyvinyl alcohol eye drops). (drugs.com)
  • This is not a list of all drugs or health problems that interact with this medicine (phenylephrine and polyvinyl alcohol eye drops). (drugs.com)
  • What are some things I need to know or do while I take Phenylephrine and Polyvinyl Alcohol Eye Drops? (drugs.com)
  • Tell all of your health care providers that you take this medicine (phenylephrine and polyvinyl alcohol eye drops). (drugs.com)
  • How is this medicine (Phenylephrine and Polyvinyl Alcohol Eye Drops) best taken? (drugs.com)
  • Use this medicine (phenylephrine and polyvinyl alcohol eye drops) as ordered by your doctor. (drugs.com)
  • Lenses may be put back in 15 minutes after this medicine (phenylephrine and polyvinyl alcohol eye drops) is given. (drugs.com)
  • What are some other side effects of Phenylephrine and Polyvinyl Alcohol Eye Drops? (drugs.com)
  • This relates to partially acetalized polyvinyl alcohol embolization particles suitable for implanting in the human body, to compositions containing those particles, and to methods of making and using them. (google.com.au)
  • He also developed hiccoughs, odynophagia and radiating neck pain following administration of polyvinyl alcohol for thyroid artery embolization. (springer.com)
  • Trisacryl gelatin microspheres versus polyvinyl alcohol particles in the preoperative embolization of bone neoplasms. (curehunter.com)
  • Nanofibrillated Cellulose (NFC) matrix - Polyvinyl Alcohol (PVA) nanocomposite films' were prepared by casting from NFC/PVA suspension mixtures. (scielo.br)
  • Polyvinyl alcohol fibers are manufactured from polyvinyl alcohol resins. (clickpress.com)
  • films of soluble film-forming material such as polyvinyl alcohol, it is the conventional practice to fiow a film of a solution of the film-forming material onto the casting surface, for example,'a metal wheel or belt, cause the solvent to be substantially completely removed from the liquid film whereby to form a self-sustaining film, and to strip the resulting film from the casting surface. (google.com)
  • A water-soluble film which comprises a saccharide component and a vinyl alcohol resin component, where the vinyl alcohol resin may include functional comonomer units such as sulfonic acid functional groups or salts thereof. (freepatentsonline.com)
  • Detergent packaging is also expected to be the fastest growing application market for water soluble polyvinyl alcohol films, at an estimated CAGR of 4.2% from 2017 to 2025. (benzinga.com)
  • Nanocomposite films with NFC addition to polyvinyl alcohol (PVA) in order to produce films with higher mechanical strength and potential for use were prepared. (scielo.br)
  • The North Korean -manufacture fiber Vinalon is produced from polyvinyl alcohol. (wikipedia.org)
  • The polyvinyl alcohol fiver PVA obtained by treating this fiber with formaldehyde is called vinylon in wordly. (alibaba.com)
  • Polyvinyl alcohol fibers are used as reinforcing materials in fiber concrete and widely used as substitutes for asbestos, which are detrimental to human health. (clickpress.com)
  • We report conditions leading to the development of calcifications on the polyvinyl alcohol (PVA) matrix introduced in hollow fiber devices for the encapsulation of primary human fibroblasts implanted in mice. (epfl.ch)
  • Polyvinyl Alcohol Sponges can be wrung nearly dry, so they are barely wet. (collectioncare.org)
  • However, when electrolytes are used for this purpose, they have a tendency to adversely modify the viscosity of the polyvinyl alcohol dope, and to promote corrosion of the casting surface. (google.com)
  • The monomer, vinyl alcohol , is unstable with respect to acetaldehyde . (wikipedia.org)
  • Gels formed from commercially available polyvinyl alcohol (PVA) and 1,4-benzene diboronic acid (BdBA) in DMSO absorb NaOH efficiently from a bulk aqueous solution decreasing its pH. (rsc.org)
  • Raw material to polyvinyl nitrate (PVN) an ester of nitric acid and polyvinyl alcohol. (wikipedia.org)
  • Polyvinyl alcohol has a history of use in cosmetic, food packaging materials, pharmaceutical and medical applications. (inchem.org)
  • This study aimed to investigate if carbazate-activated polyvinyl alcohol (PVAC), an aldehyde-carbonyl inhibitor, can reduce intraperitoneal adhesions in an experimental model. (diva-portal.org)
  • Temperature dependent X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis were used to investigate the crystallization of n-octadecane-water-slurries stabilized by common used surfactants (Triton X100, Tween60 and Span60) as well as by several polyvinyl alcohols (PVA) differing in degree of hydrolyses and polymerization. (fraunhofer.de)
  • Product Name Polyvinyl Alcohol (PVA) CAS No 9002-89-5 Molecular Formula (C2H4O)x Application Polyvinyl alcohol is mainly used in Textile sizing material, bond, coating, emulsifier, soil modifying agent,etc. (bushorchimp.com)
  • Polyvinyl alcohol (PVA) has commercial applications in the adhesive, paper coating, and textile industries ( 10 , 18 ). (asm.org)
  • 1. A composition for forming an occlusion in a body opening or cavity comprising hydrated, partially acetalized, polyvinyl alcohol foam particles having particle size, pore size, and particle porosity, the particles being substantially suspended in a selected injectable, biologically acceptable, liquid medium having a liquid medium specific gravity. (google.com.au)
  • This study proposes the use of sodium trimetaphosphate (STMP) crosslinked polyvinyl alcohol (PVA) as small diameter vascular graft due to its low thrombogenicity and excellent mechanical property. (uwaterloo.ca)
  • Polyvinyl alcohol is used as a coating, binder, sealing and surface finishing agent in food products such as dairy-based desserts, confectionery and cereal products and dietary supplement tablets, in the range of 0.2 1.8% by weight. (inchem.org)
  • Stapes is the dominant segment of the polyvinyl alcohol fibers market. (clickpress.com)
  • [ClickPress, Mon Apr 22 2019] Looking at the current market trends as well as the promising demand status of the Polyvinyl Alcohol Fibers Market , it can be projected that the future years will bring out positive outcomes. (clickpress.com)
  • These were developed in Japan and were first commercialized by Kuraray Co. Ltd. Polyvinyl alcohol fibers were developed for usage in textiles, fabrics, and clothing applications. (clickpress.com)
  • Polyvinyl alcohol fibers are also used in cement additives, nonwovens, and other applications such as ropes, tire cords, and fishing nets. (clickpress.com)
  • Production of polyvinyl alcohol fibers is concentrated in China and Japan. (clickpress.com)
  • Many China-based players operate in the polyvinyl alcohol fibers market. (clickpress.com)
  • Textiles is another significant consumer of polyvinyl alcohol fibers. (clickpress.com)
  • The polyvinyl alcohol fibers market in North America and Europe is projected to expand at a sluggish to moderate pace during the forecast period. (clickpress.com)
  • Demand for polyvinyl alcohol fibers in these regions is anticipated to rise due to the increasing usage of these fibers as substitute for asbestos in cement additive applications. (clickpress.com)
  • Demand for polyvinyl alcohol fibers is estimated to increase significantly in Middle East & Africa and Latin America in the near future. (clickpress.com)
  • However, they are projected to create lucrative opportunities for manufacturers of polyvinyl alcohol fibers in the next few years.The report analyzes and forecasts the polyvinyl alcohol fibers market at the global and regional levels. (clickpress.com)
  • It also covers the expected impact of these drivers and restraints on the demand for polyvinyl alcohol fibers during the forecast period. (clickpress.com)
  • Widespread use as a film used for intravaginal implantation of a spermicide and concern about absorption of polyvinyl alcohol (PVA). (nih.gov)
  • Polarized absorption (at 296 and 85 K), fluorescence, and photoacoustic (at 296 and 85 K) spectra of antenna complexes-phycobilisomes isolated from cyanobacteria Tolypothrix tenuis and Oscillatoria and embedded in isotropic and anisotropic polyvinyl alcohol films-were measured. (springer.com)
  • In enzymology, a polyvinyl-alcohol oxidase (EC 1.1.3.30) is an enzyme that catalyzes the chemical reaction polyvinyl alcohol + O2 ⇌ {\displaystyle \rightleftharpoons } oxidized polyvinyl alcohol + H2O2 Thus, the two substrates of this enzyme are polyvinyl alcohol and O2, whereas its two products are oxidized polyvinyl alcohol and H2O2. (wikipedia.org)
  • The physical characteristics of polyvinyl alcohol vary depending on the degree of polymerization and hydrolysis. (inchem.org)
  • This invention relates to the manufacture of films of polyvinyl alcohol, and more particularly 1 to the stripping from the casting surface of sheets or films of polyvinyl alcohol formed by the dry- I castingprccess. (google.com)
  • In the formation of films of polyvinyl alcohol by a continuous casting process, the adhesion of the film to the casting surface has been a frequent source of difficulty. (google.com)
  • An object of this invention, therefore, is the manufacture of strong, transparent, flexible polyvinyl alcohol sheets or films which are undeformed or unmarred, and which contain substantially no electrolytes. (google.com)
  • The polyvinyl alcohol films, which contain HAuCl 4 (1 mM) in the presence of benzophenone, exhibit absorbance spectra at 30 minutes after the irradiation with the single laser (black line) and the two two-color lasers (red line). (photonics.com)
  • The inset photo shows polyvinyl alcohol films containing HAuCl 4 and benzophenone after irradiation with a single laser and the two-color lasers. (photonics.com)
  • As a result, the booming laundry service industry is projected to contribute to the growth for polyvinyl alcohol films market. (benzinga.com)
  • A further object is the provision of means whereby the dried or partially dried film of polyvinyl alcohol may'be readily stripped from a metal casting surface. (google.com)
  • Groups of female BALB/cCrS1c mice aged 8 12 weeks received 125 I-labelled polyvinyl alcohol with relative molecular mass ranging from 14 800 to 434 000 , by injection into the tail vein. (inchem.org)
  • The half-life for excretion varied from 90 min for the polyvinyl alcohol of low relative molecular mass, to 23 h for polyvinyl alcohol of highest molecular weight. (inchem.org)
  • Almost 80% of polyvinyl alcohol of low relative molecular mass (14 800) was excreted by this route within 30 min of administration. (inchem.org)
  • Polyvinyl Alcohol exhibits resistance to moisture and therefore, is predominantly used in the food packaging. (issuu.com)
  • Degradation of polyvinyl alcohol (PVA) was investigated by using a combination of chemical treatment with Fenton's reagent and biological degradation with the white rot fungus Pycnoporus cinnabarinus . (asm.org)
  • Item No. DY-J-002 Appearance Well-proportioned voids,colorful Material polyvinyl alcohol Property Strong water-absorbing and detergency Advantages environment-friendly Description: 1. (bushorchimp.com)
  • Product innovation for a new application is a noted trend for the Polyvinyl Alcohol Market. (issuu.com)
  • Polyvinyl Alcohol Market Research Report- Forecast to 2023 Regional Analysis Asia Pacific is the fastest growing market for Polyvinyl Alcohol as a result of rapidly growing demand from packaging industry especially pertaining to convenience food, from the working class in the developing economies such as India, China, Thailand, and South Korea. (issuu.com)
  • They are prepared from polyvinyl alcohol by reaction with butyraldehyde and formaldehyde , respectively. (wikipedia.org)
  • Butyraldehyde and formaldehyde afford polyvinyl butyral (PVB) and polyvinyl formal (PVF), respectively. (wikipedia.org)