Definitions for lactic acid
lac·tic acid

Princeton's WordNetRate this definition:0.0 / 0 votes

1. lactic acidnoun

   a clear odorless hygroscopic syrupy carboxylic acid found in sour milk and in many fruits

WiktionaryRate this definition:0.0 / 0 votes

1. lactic acidnoun

   2-hydroxy-propanoic acid (CH.CHOH.COH), a syrupy liquid, soluble in water; found in milk, wine and many fruits; used as a food additive and in many industrial applications.

WikipediaRate this definition:0.0 / 0 votes

1. Lactic acid

   Lactic acid is an organic acid. It has a molecular formula CH3CH(OH)COOH. It is white in the solid state and it is miscible with water. When in the dissolved state, it forms a colorless solution. Production includes both artificial synthesis as well as natural sources. Lactic acid is an alpha-hydroxy acid (AHA) due to the presence of a hydroxyl group adjacent to the carboxyl group. It is used as a synthetic intermediate in many organic synthesis industries and in various biochemical industries. The conjugate base of lactic acid is called lactate (or the lactate anion). The name of the derived acyl group is lactoyl. In solution, it can ionize by loss of a proton to produce the lactate ion CH3CH(OH)CO−2. Compared to acetic acid, its pKa is 1 unit less, meaning lactic acid is ten times more acidic than acetic acid. This higher acidity is the consequence of the intramolecular hydrogen bonding between the α-hydroxyl and the carboxylate group. Lactic acid is chiral, consisting of two enantiomers. One is known as L-lactic acid, (S)-lactic acid, or (+)-lactic acid, and the other, its mirror image, is D-lactic acid, (R)-lactic acid, or (−)-lactic acid. A mixture of the two in equal amounts is called DL-lactic acid, or racemic lactic acid. Lactic acid is hygroscopic. DL-Lactic acid is miscible with water and with ethanol above its melting point, which is about 16 to 18 °C (61 to 64 °F). D-Lactic acid and L-lactic acid have a higher melting point. Lactic acid produced by fermentation of milk is often racemic, although certain species of bacteria produce solely D-lactic acid. On the other hand, lactic acid produced by anaerobic respiration in animal muscles has the (L) enantiomer and is sometimes called "sarcolactic" acid, from the Greek sarx, meaning "flesh". In animals, L-lactate is constantly produced from pyruvate via the enzyme lactate dehydrogenase (LDH) in a process of fermentation during normal metabolism and exercise. It does not increase in concentration until the rate of lactate production exceeds the rate of lactate removal, which is governed by a number of factors, including monocarboxylate transporters, concentration and isoform of LDH, and oxidative capacity of tissues. The concentration of blood lactate is usually 1–2 mM at rest, but can rise to over 20 mM during intense exertion and as high as 25 mM afterward. In addition to other biological roles, L-lactic acid is the primary endogenous agonist of hydroxycarboxylic acid receptor 1 (HCA1), which is a Gi/o-coupled G protein-coupled receptor (GPCR).In industry, lactic acid fermentation is performed by lactic acid bacteria, which convert simple carbohydrates such as glucose, sucrose, or galactose to lactic acid. These bacteria can also grow in the mouth; the acid they produce is responsible for the tooth decay known as caries. In medicine, lactate is one of the main components of lactated Ringer's solution and Hartmann's solution. These intravenous fluids consist of sodium and potassium cations along with lactate and chloride anions in solution with distilled water, generally in concentrations isotonic with human blood. It is most commonly used for fluid resuscitation after blood loss due to trauma, surgery, or burns.

ChatGPTRate this definition:0.0 / 0 votes

1. lactic acid

   Lactic acid, also known as milk acid, is an organic acid compound. It is a colorless or yellow liquid that is water-soluble. It is produced both naturally and synthetically. In the human body, it is produced during normal metabolism and exercise when oxygen levels are low and the body converts glucose into energy, a process known as anaerobic metabolism. It is also used in food preservation, dyeing, tanning and it contributes to the sour taste of fermented foods. Its chemical formula is C3H6O3.

WikidataRate this definition:0.0 / 0 votes

1. Lactic acid

   Lactic acid, also known as milk acid, is a chemical compound that plays a role in various biochemical processes and was first isolated in 1780 by the Swedish chemist Carl Wilhelm Scheele. Lactic acid is a carboxylic acid with the chemical formula C3H6O3. It has a hydroxyl group adjacent to the carboxyl group, making it an alpha hydroxy acid. In solution, it can lose a proton from the acidic group, producing the lactate ion CH3CHCOO−. Compared to acetic acid, its pKa is 1 unit smaller, meaning lactic acid deprotonates ten times as easily as acetic acid does. This higher acidity is the consequence of the intramolecular hydrogen bridge between the α-hydroxyl and the carboxylate group, making the latter less capable of strongly attracting its proton. Lactic acid is miscible with water or ethanol, and is hygroscopic. Lactic acid is chiral and has two optical isomers. One is known as L--lactic acid or-lactic acid and the other, its mirror image, is D--lactic acid or-lactic acid. In animals, L-lactate is constantly produced from pyruvate via the enzyme lactate dehydrogenase in a process of fermentation during normal metabolism and exercise. It does not increase in concentration until the rate of lactate production exceeds the rate of lactate removal, which is governed by a number of factors, including monocarboxylate transporters, concentration and isoform of LDH, and oxidative capacity of tissues. The concentration of blood lactate is usually 1–2 mmol/L at rest, but can rise to over 20 mmol/L during intense exertion.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Lactic Acid

   A normal intermediate in the fermentation (oxidation, metabolism) of sugar. The concentrated form is used internally to prevent gastrointestinal fermentation. (From Stedman, 26th ed)

Matched Categories

1. • Carboxylic Acid

How to pronounce lactic acid?

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How to say lactic acid in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of lactic acid in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of lactic acid in Pythagorean Numerology is: 2

Examples of lactic acid in a Sentence

1. Lia Thomas:

   I'm a little bit more hopeful because I think that, at least as swimmers, we kind of realize that it's not just testosterone levels, it's testosterone levels from the last 20 years and how that affected, you know, the fact that [Thomas] went through male puberty and the way that built her heart and lungs and her hands and the way she circulates blood and the lactic acid and all that stuff.

2. Lund University researcher Tobias Olofsson:

   Well, we've seen in our research that the honey bees actually add great flora of lactic acid bacteria in honey so the mead, when produced, is actually fermented by these lactic acid bacteria together with wild yeasts and the lactic acid bacteria can really kill off all the dangerous pathogens that are even resistant against antibiotics. So our thinking is that the mead, when you consume the mead, these (antibacterial substances in) lactic acid bacteria in the drink can actually be transferred to your blood and help you when you are infected with dangerous bacteria or promote health, preventing infections.

3. Julia Mancuso:

   I personally love doing hot/cold, it’s a great way to recover, if you’re going into the hot tub make sure you periodically get out and into a cold shower. For every 5 minutes in hot I do 1 minute in cold-- and the more time you spend in the cold, the better the effect will be-- it helps flush out the lactic acid.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=lactic acid
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Lactic_Acid
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Lactic_Acid
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=lactic acid