hyaluronic acid - ορισμός. Τι είναι το hyaluronic acid
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Τι (ποιος) είναι hyaluronic acid - ορισμός

AN ANIONIC, NONSULFATED GLYCOSAMINOGLYCAN DISTRIBUTED WIDELY THROUGHOUT CONNECTIVE, EPITHELIAL, AND NEURAL TISSUES
Hyaluronate; Hyalgan; Synvisc; Viscosupplementation; Duralane; Highly ironic acid; Hyaluronin; Supartz; Durolane; ATC code D03AX05; ATCvet code QD03AX05; ATC code M09AX01; ATCvet code QM09AX01; ATC code R01AX09; ATCvet code QR01AX09; ATC code S01KA01; ATCvet code QS01KA01; Hylauronic acid; Hylaform Fine Lines; Synvisc-One; Rooster comb injections; Hyaluronan; Fasciacyte
  • A joint hydration supplement that uses hyaluronic acid
  • Precursor 1: Synthesis of UDP-Glucuronic Acid
  • Precursor 2: Synthesis of UDP-N-Acetylglucosamine
  • Final step of HA Synthesis

hyaluronic acid         
[?h???lj??'r?n?k]
¦ noun Biochemistry a viscous fluid carbohydrate present in connective tissue, synovial fluid, and the humours of the eye.
Origin
1930s: from a blend of hyaloid and uronic acid (an oxidized sugar, from uro-1 'urine').
hyaluronate         
[?h???'lj?r?ne?t]
¦ noun Biochemistry a salt or ester of hyaluronic acid.
acidity         
  • [[Acetic acid]], a [[weak acid]], donates a proton (hydrogen ion, highlighted in green) to water in an equilibrium reaction to give the [[acetate]] ion and the [[hydronium]] ion. Red: oxygen, black: carbon, white: hydrogen.
  • Svante Arrhenius
  • 374px
  • year = 1978}}</ref> Point 2 is the first equivalent point where the amount of NaOH added equals the amount of alanine in the original solution.
  • Carbonated water (H<sub>2</sub>CO<sub>3</sub> aqueous solution) is commonly added to soft drinks to make them effervesce.
CHEMICAL COMPOUND GIVING A PROTON OR ACCEPTING AN ELECTRON PAIR
Acidic; Polyprotic acid; Polyprotic; Acid (chemistry); Naming acids; List of Acids; Acids; Acidity; List of acids; Diprotic acid; Protic acid; Acids, acyclic; Amino acid transport systems, acidic; Monoprotic acid; Diprotic Acid; Monoprotic Acid; Diprotic; Acidified; Monoprotic Acids; Monobasic acid; Mono-basic acid; Dibasic acid; Tribasic acid; Active acidity; Polyprotic acids; Polyprotic Acid; Triprotic; Monoprotic; Monoacid; Diprotic acids; Monoprotic acids; Protolysis; Free acid; Triprotic acid; Polybasic acid; Tetraprotic acid; Pentaprotic acid; Hexaprotic acid; Heptaprotic acid; Protolyze; Protolyse; Acidic acid
n.
Acidness, sourness, tartness, sharpness.

Βικιπαίδεια

Hyaluronic acid

Hyaluronic acid (; abbreviated HA; conjugate base hyaluronate), also called hyaluronan, is an anionic, nonsulfated glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues. It is unique among glycosaminoglycans as it is non-sulfated, forms in the plasma membrane instead of the Golgi apparatus, and can be very large: human synovial HA averages about 7 million Da per molecule, or about 20,000 disaccharide monomers, while other sources mention 3–4 million Da.

The average 70 kg (150 lb) person has roughly 15 grams of hyaluronan in the body, one-third of which is turned over (i.e., degraded and synthesized) per day.

As one of the chief components of the extracellular matrix, it contributes significantly to cell proliferation and migration, and is involved in the progression of many malignant tumors. Hyaluronic acid is also a component of the group A streptococcal extracellular capsule, and is believed to play a role in virulence.

Παραδείγματα από το σώμα κειμένου για hyaluronic acid
1. Moisturizing creams and lotions contain humectants, like glycerin or hyaluronic acid, which attract moisture from the air and from the deeper layers of skin.
2. "Hyaluronic acid is, in fact, widely recognised by dermatologists as a high–powered hydrating ingredient which is naturally present in the skin, and which helps lock moisture in the skin." Share this article: What is this?
3. Television adverts are filled with references to pentapeptides, lipopeptides and hyaluronic acid and claim products will "refuel surface skin cells" resulting in a "dewy glow". But after posing as a customer and contacting three companies for a better explanation, Which? said the "evidence" to back up the claims is confusing – even to a trained scientist.
4. It said: "Pentapeptides, hyaluronic acid and omega 3 might sound impressive, but scratch beneath the surface of the glossy cosmetic adverts and the claims of some companies don‘t make a whole lot of sense." The consumer magazine said it approached customer services at Olay Regenerist, Garnier Nutritionist Omega Skin and L‘Oreal Derma Genesis and asked how its ingredients actually worked on the skin.