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Composition

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Wikipedia About Hydrogel

Hairgel.JPG

Composition

A solid network spans the volume of a liquid medium. Both by weight and volume, gels are mostly liquid in composition and thus exhibit densities similar to liquids. However, they have the structural coherence of a solid. The network can be composed of a wide variety of materials, including particles, polymers and proteins.

Cationic polymers

Cationic polymers are positively charged polymers. Their positive charges prevent the formation of coiled polymers. This allows them to contribute more to viscosity in their stretched state, because the stretched-out polymer takes up more space than a coiled polymer and thus resists the flow of solvent molecules around it. Cationic polymers are a main functional component of hair gel, because the positive charged polymers also bind the negatively charged amino acids on the surface of the keratin molecules in the hair. More complicated polymer formulas exist, e.g., a copolymer of vinylpyrrolidone, methacrylamide, and hydrogel N-vinylimidazole.

Hydrogels

Hydrogel is a network of polymer chains that are water-insoluble, sometimes found as a colloidal gel in which water is the dispersion medium. Hydrogels are superabsorbent (they can contain over 99% water) natural or synthetic polymers. Hydrogels also possess a degree of flexibility very similar to natural tissue, due to their significant water content.

Common uses for hydrogels include

  • currently used as scaffolds in tissue engineering. When used as scaffolds, hydrogels may contain human cells in order to repair tissue.
  • environmentally sensitive hydrogels. These hydrogels have the ability to sense changes of pH, temperature, or the concentration of metabolite and release their load as result of such a change.
  • as sustained-release delivery systems
  • provide absorption, desloughing and debriding capacities of necrotics and fibrotic tissue.
  • hydrogels that are responsive to specific molecules, such as glucose or antigens can be used as biosensors as well as in DDS.
  • used in disposable diapers where they "capture" urine, or in sanitary napkins
  • contact lenses (silicone hydrogels, polyacrylamides)
  • medical electrodes using hydrogels composed of cross linked polymers (polyethylene oxide,polyAMPS and polyvinylpyrrolidone)
  • Water gel explosives

Other, less common uses include

  • breast implants
  • granules for holding soil moisture in arid areas
  • dressings for healing of burn or other hard-to-heal wounds. Wound GEL are excellent for helping to create or maintain environment.
  • reservoirs in topical drug delivery; particularly ionic drugs, delivered by iontophoresis (see ion exchange resin)

Search results for Hydrogel

Official Site of Silicone Hydrogel Lenses

Case Studies using Silicone Hydrogel Lenses. This patient has slight hayfever currently. ... wear of HEMA and silicon-hydrogel lens wear causes significant changes to ...www.siliconehydrogels.org/index.asp

Hydrogel - Compare & Buy At The Lowest Prices - Pronto.com

Browse Pronto.com's most popular hydrogel offers. Compare and buy hydrogel products at the lowest prices. Comparison shopping made easy.www.pronto.com/mpm/search-hydrogel/

Woun'dres Collagen Hydrogel | DevineMedical.us

Find Woun'dres Collagen Hydrogel at DevineMedical.us. Offering aids to daily living, blood pressure monitors, diabetes care products and more at wholesale prices.store.devinemedical.us/col7690.html

Hydrogel Contact Lenses - NexTag.com

Compare Cheap Prices for Hydrogel Contact Lenses at NexTag.com. Shop for Bargain Sporting Goods, Toys, Collectibles, Car Parts, Food, and the Good Things in Life.www.nextag.com/hydrogel-contact-lenses

Skintegrity Hydrogel

Skintegrity Hydrogel. Skintegrity Wound Cleanser. Sureprep. Suresite. TenderWet Active ... Hydrogel Cytotoxicity Testing. Skintegrity Hydrogel Preservative ...www.medline.com/woundcare/products/skintegrityhydrogel/docum...

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News about Hydrogel

High Growth Reported for the World Medical Adhesives & Sealants Market

Marketwire via Yahoo! Finance Reportlinker.com announces that a new market research report related to the Pharmaceutical industry industry is available in its catalogue.http://biz.yahoo.com/iw/080910/0432650.html

Nerites Corporation Awarded Phase II SBIR Grant for Anti-Fouling Coatings

PR Newswire via Yahoo! Finance It is not pleasant to think about, but the small pipes and hoses that carry water to your mouth in dentists' offices can easily become contaminated.http://biz.yahoo.com/prnews/080909/aqtu093.html?.v=65

New Hope In Sight For Cataract Patients: Coated Lenses Set To Reduce Post-Op Infection

Medical News TodayResearch presented at the British Pharmaceutical Conference (BPC) in Manchester reveals that coating an artificial lens with antibiotics could significantly reduce the risk of post-operative infection, and even blindness, for cataract patients.http://www.medicalnewstoday.com/articles/120629.php

Researchers Use Light In MRSA Fight

Medical News TodayNew treatment using a light-activated drug could revolutionise the fight against hospital "superbug", MRSA (otherwise known as meticillin resistant staphylococcus aureus) it was revealed at the British Pharmaceutical Conference (BPC) in Manchester.http://www.medicalnewstoday.com/articles/120636.php

Light-drug to treat superbug MRSA

Channel 4Patients with the hospital superbug MRSA could receive more effective treatment from a light-activated drug, according to new research.http://www.channel4.com/news/articles/society/health/lightdr...

News about Hydrogel

Proper Use and Care More Important than New Lens Types for Contact ...

Science DailyThe largest combined study of this problem to date was conducted by Australian and United Kingdom researchers, who were especially interested in whether the new silicone hydrogel lenses would reduce infection risk as a result of their improved oxygen ... http://www.sciencedaily.com/releases/2008/10/081001125954.ht...

Carson City students take first steps toward science careers

Nevada Appeal ... school science club," said Jim Barcellos, a Cooperative Extension instructor along with Leticia Servin. "These same youth, in turn, will teach the experiments to their fellow after-school students next week." The youth demonstrated how well hydrogel ... http://www.nevadaappeal.com/article/20081010/NEWS/110109994/...

Senate wants FCC to conduct "advanced blocking" study

Ars TechnicaA new scaffold to treat arthritis Scientists created a new hydrogel that can act as a scaffold for cartilage growth, which would help people suffering from osteoarthritis.http://arstechnica.com/news.ars/post/20081005-senate-wants-f...

Putting patients ‘on ice’ reduces brain damage

Daily GazetteHydrogel-coated pads are placed along the patient’s flanks and legs, similar to using ice packs. A temperature probe placed in a Foley catheter continuously monitors body temperature and reports it to the Arctic Sun System. The water temperature in ... http://www.dailygazette.com/news/2008/oct/06/1007_ice/

Nobel Intent

Ars TechnicaSimultaneously, the hydrogel would form a scaffold that supports cell growth, allowing the preferred hyaline cartilage to form. To accomplish all this, the hydrogels must stay in place at the damaged site, be biocompatible, and biodegrade naturally ... http://arstechnica.com/journals/science.ars/2006/5/2/3819/p2

Search results for Hydrogel

hydrogel - definition of hydrogel in the Medical dictionary - by the ...

hy·dro·gel (h dr-j l) n. A colloidal gel in which the particles are dispersed in water. hydrogel. a gel that contains water. hydrogel Wound care A polymer absorptive wound ... http://medical-dictionary.thefreedictionary.com/hydrogel

Hydrogel Dressings

Hydrogel Dressings Offer Advancements In Wound Healing. By Sheri H. Smith, RN, PhD. CETN Carrington Laboratories, Inc. Hydrogel dressings were among the first "advanced" wound care ... http://www.iasc.org/smith.html

Official Site of Silicone Hydrogel Lenses

Offers information about silicone hydrogels, a class of highly oxygen permeable contact lens materials.http://www.siliconehydrogels.org/

Hydrogel :: tailor made for submerged aquatic weed management

Hydrogel, the ideal aquatic herbicide additive. Tailor made for submerged aquatic weed management, available from Bettersafe Pest and Weed Management Pty Ltd.http://www.hydrogel.com.au/

Terra-Sorb Hydrogel : Hallson Gardens

Terra-Sorb Hydrogel Crystals - Water absorbing, nutrient conserving soil amendment. ... Terra-Sorb TM Hydrogel Crystals. Water absorbing, nutrient conserving soil amendment.http://www.perennialnursery.com/tools/hydrogel.html
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Videos found for Hydrogel

Get Healthy The Simple Way - Proven...

Get Healthy The Simple Way - Proven HydroGel Technology!Insulating electrical rotors by spray coating technology.Hourly production: 550 pieces.Flash - Video

USA - SCIENCE: Growing human organs...

USA - SCIENCE: Growing human organs and tissue in a lab may be possible with a new gel invented by U...In what appears like something out of a science fiction movie, researchers are getting ready to print out copies of human organs - then re-grow them in the lab. A clear, odorless...MPEG 4 - Video

3D Printer Robot for TE: Generating...

3D Printer Robot for TE: Generating Hydrogel ChannelsBrief introduction regarding how to generate hydrogel channels for tissue engineered product. This innovative technology, using 3D printing techniques to directly print channels...Flash - Video

How to Fight a Summer Migraine

How to Fight a Summer MigraineOne in six 16 to 65 years olds in the UK suffer from migraines, and for many of those summer means pain. The symptoms of migraine - throbbing headaches, nausea and vomiting - can...Flash - Video

New Medical Gel Could Grow Human Or...

New Medical Gel Could Grow Human Organs - videoGrowing human organs and tissue in a lab may be possible with a new gel invented by Utah... 11/2005 ReutersWindows Media - Video

Videos found for Hydrogel

movie4490.mpg

movie4490.mpgManipulation of Micro Particles by Using Dielectrophoresis [Slide Show *], [Movie 1 ], [Movie 2 ], [ Movie 3 ] by Martin Ma * This slide show contains movies that may or may not work on all computers....mpeg: 8.5 MB w:352px - h:240px

top_phase_change.avi

top_phase_change.aviincluding the regimes of unstable and stable phase transitions, surface pattern formation, and bulk phase separation. This paper is available in pdf form (35 pages, ~7.1 MB)avi: 7.5 MB w:673px - h:584px

inchworm2.mpg

inchworm2.mpgthe motion of the gel. The scales are oriented at 60 degrees to the vertical. (Frequency = 80 Hz, displacement amplitude = 0.55 mm, filament length = 4.2 cm, filament radius = 2.25 mm). inchworm2.mpg ...mpeg: 4.0 MB w:352px - h:288px

asym_mov.mpg

asym_mov.mpgto the left, when the plate motion follows an periodic exponential rise pattern (frequency = 100 Hz, displacement amplitude = 0.11 mm, filament length = 2 cm, filament radius = 2.25 mm). asym_mov.mpg ...mpeg: 1.7 MB w:352px - h:288px

YouTube - tecnologia parches 2/4

YouTube - tecnologia parches 2/4tecnologia hydrogelflash: 2.8 MB w:450px - h:356px

Answers for Hydrogel

ButtaHow safe is Hydrogel?Buttabelieve its really sore dont do itBellatrixHow many types of silicon hydrogel conact lenses are there, who makes them?BellatrixThere are three types. Accuvue makes them, a division of Johnsons and Johnson.gabrooAre there any daily disposable contact lenses made from Silicone Hydrogel?gabrooYea, Acuvue makes Soft Daily Disposable contact lenses.loren di live in pensacola fl and i wanna know where can i find hydrogel implants at ?loren dPANDA PIGS! unipers. weh lost. i play sucker all the time in paris! DANG I funneh! Owwwww Mom, I'm changing! WHAT SPRINKLERS WARE? =D Joe Jonas? Whaaaaaaaaaaaaaaaaaaaaaat! WHAT! She has ch...cham_syoWhat is a hydrogel wound dressing?cham_syoIT'S STERILE WATER IN A GEL FORM USED TO KEEP WOUNDS MOIST.
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