Lactic acid - Revision history

Matthew: /* Chemical and physical properties */

2025-02-27T15:58:04Z

Chemical and physical properties

← Older revision		Revision as of 15:58, 27 February 2025
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	==Chemical and physical properties==		==Chemical and physical properties==
	Lactic acid is a low molecular-weight acid, with a boiling point of ~~122 C~~ under standard conditions and a vapor pressure around 10 Pa at room temperature. With a lower vapor pressure than acetic acid, lactic acid is less volatile and only contributes slightly to the odor of Lambic. Lactic acid is ten times more acidic than acetic acid, as measured by the propensity to lose a proton. This gives lactic acid a soft, acidic taste even in low concentrations. Lactic acid is a common part of many food products and is primarily responsible for the tart, fresh taste of yogurt, keffir, cottage cheese, and other sour milk products as well as many non-dairy products such as kombucha, sourdough bread, and ~~Lambic~~.		Lactic acid is a low molecular-weight acid, with a boiling point of 122ºC under standard conditions and a vapor pressure around 10 Pa at room temperature. With a lower vapor pressure than acetic acid, lactic acid is less volatile and only contributes slightly to the odor of Lambic. Lactic acid is ten times more acidic than acetic acid, as measured by the propensity to lose a proton. This gives lactic acid a soft, acidic taste even in low concentrations. Lactic acid is a common part of many food products and is primarily responsible for the tart, fresh taste of yogurt, keffir, cottage cheese, and other sour milk products as well as many non-dairy products such as kombucha, sourdough bread, and lambic.

	==In Lambic==		==In Lambic==

Matthew: /* As a precursor to other molecules in Lambic */

2025-02-27T15:55:30Z

As a precursor to other molecules in Lambic

← Older revision		Revision as of 15:55, 27 February 2025
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	Lactic acid can combine with ethanol to form the ester ethyl lactate, via the reaction:		Lactic acid can combine with ethanol to form the ester ethyl lactate, via the reaction:

	CHOHCOOH + ~~CH3CH2OH~~ -> ~~CHOHCOOCH2CH3~~ + ~~H2O~~		CHOHCOOH + CH₃CH₂OH -> CHOHCOOCH₂CH₃ + H₂O

	Ethyl lactate has a buttery, coconut like scent in the concentrations that are likely to be found in lambic [ref].		Ethyl lactate has a buttery, coconut like scent in the concentrations that are likely to be found in lambic [ref].

Matthew: /* In Lambic */

2025-02-27T15:42:24Z

In Lambic

← Older revision		Revision as of 15:42, 27 February 2025
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	==In Lambic==		==In Lambic==
	Lactic acid is an important component of lambic and is normally found in concentrations of 4-8 g/l in the final product. Much of the "sourness" of lambic can be directly attributed to the presence of lactic acid. ~~Inital~~ quantities of lactic acid are produced by the enteric bacteria in the first weeks of fermentation, usually increasing to around 1 g/l, which remains roughly constant until 4-8 months, at which point lactic acid bacteria begin to dominate the bacteria flora in the lambic <ref name=Oevelen77 >D. Van Oevelen, M. Spaepen, P. Timmermans and H. Verachtert, [http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.1977.tb03825.x/abstract\|MICROBIOLOGICAL ASPECTS OF SPONTANEOUS WORT FERMENTATION IN THE PRODUCTION OF LAMBIC AND GUEUZE], 1977</ref>. Excessive activity at this point can lead to concentrations of lactic acid of up to 13 g/l[ref] as well as sugar/protein chains that cause the Lambic to take on a "ropy" texture. Normally, these ropes are hydrolized by Brettanomyces, but in excessively ropy lambic, the condition may persist.		Lactic acid is an important component of lambic and is normally found in concentrations of 4-8 g/L in the final product. Much of the "sourness" of lambic can be directly attributed to the presence of lactic acid. Initial quantities of lactic acid are produced by the enteric bacteria in the first weeks of fermentation, usually increasing to around 1 g/L, which remains roughly constant until 4-8 months, at which point lactic acid bacteria begin to dominate the bacteria flora in the lambic <ref name=Oevelen77 >D. Van Oevelen, M. Spaepen, P. Timmermans and H. Verachtert, [http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.1977.tb03825.x/abstract\|MICROBIOLOGICAL ASPECTS OF SPONTANEOUS WORT FERMENTATION IN THE PRODUCTION OF LAMBIC AND GUEUZE], 1977</ref>. Excessive activity at this point can lead to concentrations of lactic acid of up to 13 g/L[ref] as well as sugar/protein chains that cause the Lambic to take on a "ropy" texture. Normally, these ropes are hydrolized by Brettanomyces, but in excessively ropy lambic, the condition may persist.

	==As a precursor to other molecules in Lambic==		==As a precursor to other molecules in Lambic==

Nick: /* In Lambic */

2015-01-17T00:31:33Z

In Lambic

← Older revision		Revision as of 00:31, 17 January 2015
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	==In Lambic==		==In Lambic==
	Lactic acid is an important component of lambic and is normally found in concentrations of 4-8 g/l in the final product. Much of the "sourness" of lambic can be directly attributed to the presence of lactic acid. Inital quantities of lactic acid are produced by the enteric bacteria in the first weeks of fermentation, usually increasing to around 1 g/l, which remains roughly constant until 4-8 months, at which point lactic acid bacteria begin to dominate the bacteria flora in the lambic [ref]. Excessive activity at this point can lead to concentrations of lactic acid of up to 13 g/l[ref] as well as sugar/protein chains that cause the Lambic to take on a "ropy" texture. Normally, these ropes are hydrolized by Brettanomyces, but in excessively ropy lambic, the condition may persist.		Lactic acid is an important component of lambic and is normally found in concentrations of 4-8 g/l in the final product. Much of the "sourness" of lambic can be directly attributed to the presence of lactic acid. Inital quantities of lactic acid are produced by the enteric bacteria in the first weeks of fermentation, usually increasing to around 1 g/l, which remains roughly constant until 4-8 months, at which point lactic acid bacteria begin to dominate the bacteria flora in the lambic <ref name=Oevelen77 >D. Van Oevelen, M. Spaepen, P. Timmermans and H. Verachtert, [http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.1977.tb03825.x/abstract\|MICROBIOLOGICAL ASPECTS OF SPONTANEOUS WORT FERMENTATION IN THE PRODUCTION OF LAMBIC AND GUEUZE], 1977</ref>. Excessive activity at this point can lead to concentrations of lactic acid of up to 13 g/l[ref] as well as sugar/protein chains that cause the Lambic to take on a "ropy" texture. Normally, these ropes are hydrolized by Brettanomyces, but in excessively ropy lambic, the condition may persist.

	==As a precursor to other molecules in Lambic==		==As a precursor to other molecules in Lambic==

Adam at 02:34, 10 January 2015

2015-01-10T02:34:21Z

← Older revision		Revision as of 02:34, 10 January 2015
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	Lactic acid is an organic compound formed by lactic acid bacteria, such as Lactobacillus, Pediococcus, and Enterococcus, and to a lesser degree by Brettanomyces in lambic. It is chemically similar to acetic acid, differing in that lactic acid has an alcohol group attached to the second carbon. Lactic acid is chiral and posesses two optical isomers, (S)-lactic acid and (R)-Lactic Acid. In nature, the (S)- isomer is by far the most common.		Lactic acid is an organic compound formed by lactic acid bacteria, such as Lactobacillus, Pediococcus, and Enterococcus, and to a lesser degree by Brettanomyces in lambic. It is chemically similar to acetic acid, differing in that lactic acid has an alcohol group attached to the second carbon. Lactic acid is chiral and posesses two optical isomers, (S)-lactic acid and (R)-Lactic Acid. In nature, the (S)- isomer is by far the most common.


	==Chemical and physical properties==		==Chemical and physical properties==
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	Ethyl lactate has a buttery, coconut like scent in the concentrations that are likely to be found in lambic [ref].		Ethyl lactate has a buttery, coconut like scent in the concentrations that are likely to be found in lambic [ref].

			==References==

			<references />

Nick: /* Chemical and physical properties */

2015-01-10T00:41:59Z

Chemical and physical properties

← Older revision		Revision as of 00:41, 10 January 2015
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	==Chemical and physical properties==		==Chemical and physical properties==
	Lactic acid is a low molecular-weight acid, with a boiling point of 122 C under standard conditions and a vapor pressure around 10 Pa at room temperature. With a lower vapor pressure than acetic acid, lactic acid is less volatile. Lactic acid is ten times more acidic than acetic acid, as measured by the propensity to lose a proton. This gives lactic acid a soft, acidic taste even in low concentrations. Lactic acid is a common part of many food products and is primarily responsible for the tart, fresh taste of yogurt, keffir, cottage cheese, and other sour milk products as well as many non-dairy products such as kombucha, sourdough bread, and Lambic.		Lactic acid is a low molecular-weight acid, with a boiling point of 122 C under standard conditions and a vapor pressure around 10 Pa at room temperature. With a lower vapor pressure than acetic acid, lactic acid is less volatile and only contributes slightly to the odor of Lambic. Lactic acid is ten times more acidic than acetic acid, as measured by the propensity to lose a proton. This gives lactic acid a soft, acidic taste even in low concentrations. Lactic acid is a common part of many food products and is primarily responsible for the tart, fresh taste of yogurt, keffir, cottage cheese, and other sour milk products as well as many non-dairy products such as kombucha, sourdough bread, and Lambic.

	==In Lambic==		==In Lambic==

Nick at 00:36, 10 January 2015

2015-01-10T00:36:41Z

← Older revision		Revision as of 00:36, 10 January 2015
Line 3:		Line 3:

	==Chemical and physical properties==		==Chemical and physical properties==
	Lactic acid is a low molecular-weight acid, with a boiling point of 122 C under standard conditions. Lactic acid is ten times more acidic than acetic acid, as measured by the propensity to lose a proton. This gives lactic acid a soft, acidic taste even in low concentrations. Lactic acid is a common part of many food products and is primarily responsible for the tart, fresh taste of yogurt, keffir, cottage cheese, and other sour milk products as well as many non-dairy products such as kombucha, sourdough bread, and Lambic.		Lactic acid is a low molecular-weight acid, with a boiling point of 122 C under standard conditions and a vapor pressure around 10 Pa at room temperature. With a lower vapor pressure than acetic acid, lactic acid is less volatile. Lactic acid is ten times more acidic than acetic acid, as measured by the propensity to lose a proton. This gives lactic acid a soft, acidic taste even in low concentrations. Lactic acid is a common part of many food products and is primarily responsible for the tart, fresh taste of yogurt, keffir, cottage cheese, and other sour milk products as well as many non-dairy products such as kombucha, sourdough bread, and Lambic.

	==In Lambic==		==In Lambic==
	Lactic acid is an important component of lambic and is normally found in concentrations of 4-8 g/l in the final product. Much of the "sourness" of lambic can be directly attributed to the presence of lactic acid. Inital quantities of lactic acid are produced by the enteric bacteria in the first weeks of fermentation, usually increasing to around 1 g/l, which remains roughly constant until 4-8 months, at which point lactic acid bacteria begin to dominate the bacteria flora in the lambic [ref]. Excessive activity at this point can lead to concentrations of lactic acid of up to 13 g/l[ref] as well as sugar/protein chains that cause the Lambic to take on a "ropy" texture. Normally, these ropes are hydrolized by Brettanomyces, but in excessively ropy lambic, the condition may persist.		Lactic acid is an important component of lambic and is normally found in concentrations of 4-8 g/l in the final product. Much of the "sourness" of lambic can be directly attributed to the presence of lactic acid. Inital quantities of lactic acid are produced by the enteric bacteria in the first weeks of fermentation, usually increasing to around 1 g/l, which remains roughly constant until 4-8 months, at which point lactic acid bacteria begin to dominate the bacteria flora in the lambic [ref]. Excessive activity at this point can lead to concentrations of lactic acid of up to 13 g/l[ref] as well as sugar/protein chains that cause the Lambic to take on a "ropy" texture. Normally, these ropes are hydrolized by Brettanomyces, but in excessively ropy lambic, the condition may persist.

			==As a precursor to other molecules in Lambic==
			Lactic acid can combine with ethanol to form the ester ethyl lactate, via the reaction:

			CHOHCOOH + CH3CH2OH -> CHOHCOOCH2CH3 + H2O

			Ethyl lactate has a buttery, coconut like scent in the concentrations that are likely to be found in lambic [ref].

Nick at 00:21, 10 January 2015

2015-01-10T00:21:29Z

← Older revision		Revision as of 00:21, 10 January 2015
Line 1:		Line 1:
	Lactic acid is an organic compound formed by ~~_____~~ in lambic. It is chemically similar to acetic acid, differing in that lactic acid has an alcohol group attached to the second carbon. Lactic acid is chiral and posesses two optical isomers, (S)-lactic acid and (R)-Lactic Acid. In nature, the (S)- isomer is by far the most common.		Lactic acid is an organic compound formed by lactic acid bacteria, such as Lactobacillus, Pediococcus, and Enterococcus, and to a lesser degree by Brettanomyces in lambic. It is chemically similar to acetic acid, differing in that lactic acid has an alcohol group attached to the second carbon. Lactic acid is chiral and posesses two optical isomers, (S)-lactic acid and (R)-Lactic Acid. In nature, the (S)- isomer is by far the most common.


			==Chemical and physical properties==
			Lactic acid is a low molecular-weight acid, with a boiling point of 122 C under standard conditions. Lactic acid is ten times more acidic than acetic acid, as measured by the propensity to lose a proton. This gives lactic acid a soft, acidic taste even in low concentrations. Lactic acid is a common part of many food products and is primarily responsible for the tart, fresh taste of yogurt, keffir, cottage cheese, and other sour milk products as well as many non-dairy products such as kombucha, sourdough bread, and Lambic.

			==In Lambic==
			Lactic acid is an important component of lambic and is normally found in concentrations of 4-8 g/l in the final product. Much of the "sourness" of lambic can be directly attributed to the presence of lactic acid. Inital quantities of lactic acid are produced by the enteric bacteria in the first weeks of fermentation, usually increasing to around 1 g/l, which remains roughly constant until 4-8 months, at which point lactic acid bacteria begin to dominate the bacteria flora in the lambic [ref]. Excessive activity at this point can lead to concentrations of lactic acid of up to 13 g/l[ref] as well as sugar/protein chains that cause the Lambic to take on a "ropy" texture. Normally, these ropes are hydrolized by Brettanomyces, but in excessively ropy lambic, the condition may persist.

Nick: Lactic acid

2015-01-10T00:05:18Z

Lactic acid

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Lactic acid is an organic compound formed by _____ in lambic. It is chemically similar to acetic acid, differing in that lactic acid has an alcohol group attached to the second carbon. Lactic acid is chiral and posesses two optical isomers, (S)-lactic acid and (R)-Lactic Acid. In nature, the (S)- isomer is by far the most common.