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Archive 1 |
The Ecology section had the bold sentence in it:
An Indian study of seven bee species and 9 plant species found that 45 species from 16 genera colonise the nectaries of flowers and honey stomachs of bees. Most were members of the Candida genus; the most common species in honey stomachs was Dekkera intermedia and in flower nectaries, Candida blankii.[7] Flowers that are colonised by yeasts have less nectar to bees in them. Yeast colonising nectaries of the Stinking Hellebore have been found to raise the temperature of the flower, which may aid in attracting pollinators by increasing the evaporation of volatile organic compounds.[3][8]
Does anyone know what that was supposed to mean? It sounds like it's saying yeast inhibits nectar production, making flowers less attractive to bees, but that kind of goes against the next sentence. I've removed it for now since it was unintelligible, but someone who understands should rephrase and put it back... Personman ( talk) 17:15, 19 June 2010 (UTC)
The page states that kombucha is known in Eastern Europe as kvass. In fact, these are two different things - kombucha is made from tea, kvass is made from bread. Avatariks ( talk) 02:35, 2 May 2010 (UTC)
There is repeat of the same content of this page in topic " Yeast " and "Yeast_Cell" this may increase the data base volume the pages are,
http://en.wikipedia.org/wiki/Yeast_cell
http://en.wikipedia.org/wiki/Yeast
Introduction is way two complicated. Cut it down and just say what it is and were it is used. Be general! —Preceding
unsigned comment added by
69.110.5.244 (
talk)
21:56, 2 December 2007 (UTC)
I have made some minor changes to the Physiology section of yeast. The tone sounds like it might have been copied from some sort of childrens website. I have removed the signature "by James Boyd Dunaway" for GFDL reasons and if this content requires this signature for copyright reasons I suggest a total re-write of this 1st paragraph of that section. Re-reading it, there would seem to be straying off topic of physiology and giving a full description of yeast. -alex- 15:25, 28 October 2006 (UTC)
"Facultatively fermentative" is not normally used to describe microbial physiology. Rather, the term employed is "facultatively anaerobic". This indicates that the organism is capable of generating metabolic energy through substrate level phosphorylation - generally known as glycolysis.
Does yeast need light to carry out their life activities?
How do I develop a hypothesis?
Wow nevermind, kinda a blow to my pride but Yeast are indeed part of kingdom fungi. Strange, I guess now that I think about it fungus-like protista and normal fungi are more similar that I stated.- Moshe Constantine Hassan Al-Silverburg 06:25, 17 November 2005 (UTC)
This article should have more information on the history and natural condition of yeast because that is what I came here to find out about. I am surprised that such a major thing as yeast has such a small article. What does natural yeast look like, where and how does it grow/live? How was it originally "domesticated" and how has it been cultured over the ages?
i agree. Yeast is something that should have a lot of info on it and i am surprised that there is so little.
What about the evolution of yeast? This artical is sooo incomplete. —Preceding unsigned comment added by 69.110.5.244 ( talk) 21:52, 2 December 2007 (UTC)
I have removed some unnecessary language info from this article. Ajfweb 10:30, 29 November 2006 (UTC)
Please discuss whether to merge Yeast and Yeast (baking) at Talk:Yeast (baking). Thanks. — Quarl ( talk) 2006-12-18 02:27Z
These should also be merged somehow:
— Quarl ( talk) 2006-12-19 00:50Z
I see the point about Yeast extract. Let's hold off on that one for now but merge the others. — Quarl ( talk) 2006-12-23 03:26Z
I nominated this article for the improvement drive and i just want to thank everyone who voted for it and has contributed, this article is really looking very very good now. Thanks so much! Benbread 13:24, 27 December 2006 (UTC)
Yeast genetics and cell biology as ways to investigate eukaryotic cells isn't really dealt with. Both S cerevisiae and S pombe have fully-sequenced genomes, these aren't discussed. Vaginal yeast infections aren't discussed. Mention of conversion of sugars into ethanol as well as carbon dioxide in 'Baking' section, which affecs the flavour of bread.
Overall, excellent. TimVickers 05:17, 9 January 2007 (UTC)
There's some contradictory information in this and related articles, or at the very least a lack of detail. Specifically this phrase: "Many types of yeasts are used for making many foods: Baker's yeast in bread production, brewer's yeast in beer fermentation, yeast in wine fermentation and for xylitol[18] production."
According to the article on Saccharomyces cerevisiae, the term "baker's yest" and "brewer's yeast" both refer to S. cerevisiae (Although it mentions vaguely that other yeasts are used in brewing, without mentioning which ones). Josh 03:25, 31 August 2007 (UTC)
There should be a cite that yeast are "the worlds most primitive form of the reptilian genera." —The preceding unsigned comment was added by 69.231.75.66 ( talk) 19:17, 24 January 2007 (UTC).
I've noticed all the pictures in this article are floated right making it seems a little bit crowded, would it not be better to alternate left and right?-- Grimboy 20:58, 31 January 2007 (UTC)
In the second paragraph there is this confusing sentence:
It is also extremely important as a model organism in modern cell biology research, and is the most thoroughly researched eukaryotic microorganism, which gathers information into the biology of the eukaryotic cell and ultimately human biology.
My suggestion is to eliminate the dangling modifier like so:
It is an important model organism, and is the most thoroughly researched eukaryotic microorganism in cell biology research, which gathers information into the biology of the eukaryotic cell and ultimately human biology.
Jaco66
01:05, 8 March 2007 (UTC)
Support:
Comments:
1. Baker's yeast? 15-20° C (but what do you mean by "in any situation"?). Maikel 01:02, 18 September 2007 (UTC)
2. Does the ethonol that yeast produces kill it? —Preceding unsigned comment added by 80.148.27.246 ( talk) 00:12, 22 April 2009 (UTC)
I am not a mycologist, but I suggest that the sentence "By contrast, microscopic fungi that grow as multicellular filaments are called molds" be added somewhere in the first paragraph. Bayle Shanks 08:00, 14 July 2007 (UTC)
The caption on the photograph of grapes claims that the blush on the berries is yeast. It is not. The blush is wax on the grape surface. Yeast may be there also, but you can't see it. I think this photo and its caption should be removed. There are many opportunities to show pictures of bona fide interactions of yeast and grapes. Phytism 18:29, 6 August 2007 (UTC)
Quote: The use of potatoes, water from potato boiling, eggs, or sugar in a bread dough accelerates the growth of yeasts. ... this is not true to my knowledge for eggs and household sugar (succrose). The fat from the yolk inhbits the yeast growth, and the household sugar does likewise by binding essential water to itself. So in fact eggs and household sugar inhibit the growth of yeasts. Maikel 01:00, 18 September 2007 (UTC)
The resulting bread would have been lighter and more tasty than the normal flat, hard cake.
The bolded bit is POV in my opinion. lol!! Jake the Editor Man ( talk) 17:00, 13 December 2007 (UTC)
i looked through quickly and I saw no mention of yeast's taste —Preceding unsigned comment added by Phil Ian Manning ( talk • contribs) 12:32, 2 January 2008 (UTC)
Your more than welcome to go taste some... People don't normally eat plain yeast though... so I'm not sure it matters. —Preceding unsigned comment added by Frupert ( talk • contribs) 09:53, 10 June 2008 (UTC) The taste is important for beer and wine brewers. Over-fermented wine tastes, well, yeasty. — Preceding unsigned comment added by Dnlprck ( talk • contribs) 07:07, 20 April 2011 (UTC)
I found part of this part quite confusing to read, esp the "low ph (5.0 or lower)" which is at the first sentence.
Now I do realize what it means now, but I still suggest a rephrase of the phrase in the bracket...
How about (Numerically 5.0 or higher) —Preceding unsigned comment added by Wiknerd ( talk • contribs) 17:49, 6 May 2008 (UTC)
I've removed "Yeast is ver important to everyday life, men need it for beer and woen need it for wine, children need it to do experiments and it can be v" As it sounds like it was written by a two year old, makes no sense, and is most likely vandalism : D ~Frupert —Preceding unsigned comment added by Frupert ( talk • contribs) 09:11, 10 June 2008 (UTC)
Does yeasts have some intrinsic trait that qualifies a particular species as being a "yeast" rather than just generically being a "fungus"? What is special about all (or most) of the species of yeast that qualifies them as yeasts? -- Alecmconroy ( talk) 15:05, 2 July 2008 (UTC)
I believe that the term yeast is given to any fungus that exhibits a unicellular nonfilamentous (or nonmycelial) growth form. There are fungi that can grow unicellularly or as a mycelium, and they are usually referred to as dimorphic. Woodlore ( talk) —Preceding comment was added at 23:32, 9 July 2008 (UTC)
In the interest of fairness, if there is a section on kombucha, there should be one on kefir as well. elpincha ( talk) 17:30, 26 September 2008 (UTC)
From doing some reading there is a lot of information out there not currently included in the article. Here are some sources which could be incorporated:
Population genomics of domestic and wild yeasts - discussing the domestication of brewer's yeast
Smartse ( talk) 21:20, 14 February 2010 (UTC)
And another:
{{
cite journal}}
: Cite journal requires |journal=
(
help)SmartSE ( talk) 13:25, 20 January 2011 (UTC)
food safety, to distiguish its alternatives
--
222.67.217.239 (
talk)
10:21, 18 March 2010 (UTC)
Let the topic Ω — Yeast
--
222.64.27.154 (
talk)
02:06, 20 March 2010 (UTC)
-- 222.64.27.154 ( talk) 02:13, 20 March 2010 (UTC)
Additional info
-- 222.67.217.239 ( talk) 10:30, 18 March 2010 (UTC)
-- 222.67.217.239 ( talk) 10:38, 18 March 2010 (UTC)
-- 222.67.217.239 ( talk) 10:43, 18 March 2010 (UTC)
-- 222.64.27.154 ( talk) 02:23, 20 March 2010 (UTC)
It looks that few of the publications are there probably due to the fact that baker's yeast is heat resistant
-- 124.78.215.31 ( talk) 08:19, 20 March 2010 (UTC)
Does Yeast contain Starch or Glycogen? Interesting Question. —Preceding unsigned comment added by 86.152.45.91 ( talk) 14:34, 21 January 2011 (UTC)
![]() |
An image used in this article,
File:Marmite.jpg, has been nominated for deletion at
Wikimedia Commons in the following category: Deletion requests October 2011
Don't panic; a discussion will now take place over on Commons about whether to remove the file. This gives you an opportunity to contest the deletion, although please review Commons guidelines before doing so.
This notification is provided by a Bot -- CommonsNotificationBot ( talk) 12:17, 19 October 2011 (UTC) |
I have to question the logic and accuracy of this statement. I think the author meant to say that rising time was cut in half. Baking time would remain the same. — Preceding unsigned comment added by VaxAlpha ( talk • contribs) 18:53, 19 November 2011 (UTC)
The article refers in yeast#wine and the caption to the figure to yeasts on the surface of grapes forming a visible bloom. This is incorrect, although it may be a common misconception. The bloom has nothing whatsoever to do with yeast - it is caused by epicuticular wax crystals that are naturally secreted by the epidermis of the grape. Yeast is naturally present on the surfaces of grapes but not in sufficient numbers to form a visible coating. I suggest the article should be modified to remove this error. see e.g. Koch, K. and Ensikat, H.-J. The hydrophobic coatings of plant surfaces: epicuticular wax crystals and their morphologies, crystallinity and molecular self-assembly. Micron, 39, 759-772. Plantsurfer ( talk) 11:01, 6 April 2012 (UTC)
"A weak solution of water and sugar." Solution of what in what? Should mean a small amount of yeast and undefined amount of sugar dissolved in water? Does yeast dissolve or rather disperge in water?
"... and then left to rise, sometimes until it has doubled in size." Linearly, means to the 8-fold volume? -- Helium4 ( talk) 17:21, 29 July 2012 (UTC)
See http://www.flickr.com/search/?q=yeast&l=cc
1. What is the most ideal temperature for yeast to rise in any situation?
![]() | This is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
Archive 1 |
The Ecology section had the bold sentence in it:
An Indian study of seven bee species and 9 plant species found that 45 species from 16 genera colonise the nectaries of flowers and honey stomachs of bees. Most were members of the Candida genus; the most common species in honey stomachs was Dekkera intermedia and in flower nectaries, Candida blankii.[7] Flowers that are colonised by yeasts have less nectar to bees in them. Yeast colonising nectaries of the Stinking Hellebore have been found to raise the temperature of the flower, which may aid in attracting pollinators by increasing the evaporation of volatile organic compounds.[3][8]
Does anyone know what that was supposed to mean? It sounds like it's saying yeast inhibits nectar production, making flowers less attractive to bees, but that kind of goes against the next sentence. I've removed it for now since it was unintelligible, but someone who understands should rephrase and put it back... Personman ( talk) 17:15, 19 June 2010 (UTC)
The page states that kombucha is known in Eastern Europe as kvass. In fact, these are two different things - kombucha is made from tea, kvass is made from bread. Avatariks ( talk) 02:35, 2 May 2010 (UTC)
There is repeat of the same content of this page in topic " Yeast " and "Yeast_Cell" this may increase the data base volume the pages are,
http://en.wikipedia.org/wiki/Yeast_cell
http://en.wikipedia.org/wiki/Yeast
Introduction is way two complicated. Cut it down and just say what it is and were it is used. Be general! —Preceding
unsigned comment added by
69.110.5.244 (
talk)
21:56, 2 December 2007 (UTC)
I have made some minor changes to the Physiology section of yeast. The tone sounds like it might have been copied from some sort of childrens website. I have removed the signature "by James Boyd Dunaway" for GFDL reasons and if this content requires this signature for copyright reasons I suggest a total re-write of this 1st paragraph of that section. Re-reading it, there would seem to be straying off topic of physiology and giving a full description of yeast. -alex- 15:25, 28 October 2006 (UTC)
"Facultatively fermentative" is not normally used to describe microbial physiology. Rather, the term employed is "facultatively anaerobic". This indicates that the organism is capable of generating metabolic energy through substrate level phosphorylation - generally known as glycolysis.
Does yeast need light to carry out their life activities?
How do I develop a hypothesis?
Wow nevermind, kinda a blow to my pride but Yeast are indeed part of kingdom fungi. Strange, I guess now that I think about it fungus-like protista and normal fungi are more similar that I stated.- Moshe Constantine Hassan Al-Silverburg 06:25, 17 November 2005 (UTC)
This article should have more information on the history and natural condition of yeast because that is what I came here to find out about. I am surprised that such a major thing as yeast has such a small article. What does natural yeast look like, where and how does it grow/live? How was it originally "domesticated" and how has it been cultured over the ages?
i agree. Yeast is something that should have a lot of info on it and i am surprised that there is so little.
What about the evolution of yeast? This artical is sooo incomplete. —Preceding unsigned comment added by 69.110.5.244 ( talk) 21:52, 2 December 2007 (UTC)
I have removed some unnecessary language info from this article. Ajfweb 10:30, 29 November 2006 (UTC)
Please discuss whether to merge Yeast and Yeast (baking) at Talk:Yeast (baking). Thanks. — Quarl ( talk) 2006-12-18 02:27Z
These should also be merged somehow:
— Quarl ( talk) 2006-12-19 00:50Z
I see the point about Yeast extract. Let's hold off on that one for now but merge the others. — Quarl ( talk) 2006-12-23 03:26Z
I nominated this article for the improvement drive and i just want to thank everyone who voted for it and has contributed, this article is really looking very very good now. Thanks so much! Benbread 13:24, 27 December 2006 (UTC)
Yeast genetics and cell biology as ways to investigate eukaryotic cells isn't really dealt with. Both S cerevisiae and S pombe have fully-sequenced genomes, these aren't discussed. Vaginal yeast infections aren't discussed. Mention of conversion of sugars into ethanol as well as carbon dioxide in 'Baking' section, which affecs the flavour of bread.
Overall, excellent. TimVickers 05:17, 9 January 2007 (UTC)
There's some contradictory information in this and related articles, or at the very least a lack of detail. Specifically this phrase: "Many types of yeasts are used for making many foods: Baker's yeast in bread production, brewer's yeast in beer fermentation, yeast in wine fermentation and for xylitol[18] production."
According to the article on Saccharomyces cerevisiae, the term "baker's yest" and "brewer's yeast" both refer to S. cerevisiae (Although it mentions vaguely that other yeasts are used in brewing, without mentioning which ones). Josh 03:25, 31 August 2007 (UTC)
There should be a cite that yeast are "the worlds most primitive form of the reptilian genera." —The preceding unsigned comment was added by 69.231.75.66 ( talk) 19:17, 24 January 2007 (UTC).
I've noticed all the pictures in this article are floated right making it seems a little bit crowded, would it not be better to alternate left and right?-- Grimboy 20:58, 31 January 2007 (UTC)
In the second paragraph there is this confusing sentence:
It is also extremely important as a model organism in modern cell biology research, and is the most thoroughly researched eukaryotic microorganism, which gathers information into the biology of the eukaryotic cell and ultimately human biology.
My suggestion is to eliminate the dangling modifier like so:
It is an important model organism, and is the most thoroughly researched eukaryotic microorganism in cell biology research, which gathers information into the biology of the eukaryotic cell and ultimately human biology.
Jaco66
01:05, 8 March 2007 (UTC)
Support:
Comments:
1. Baker's yeast? 15-20° C (but what do you mean by "in any situation"?). Maikel 01:02, 18 September 2007 (UTC)
2. Does the ethonol that yeast produces kill it? —Preceding unsigned comment added by 80.148.27.246 ( talk) 00:12, 22 April 2009 (UTC)
I am not a mycologist, but I suggest that the sentence "By contrast, microscopic fungi that grow as multicellular filaments are called molds" be added somewhere in the first paragraph. Bayle Shanks 08:00, 14 July 2007 (UTC)
The caption on the photograph of grapes claims that the blush on the berries is yeast. It is not. The blush is wax on the grape surface. Yeast may be there also, but you can't see it. I think this photo and its caption should be removed. There are many opportunities to show pictures of bona fide interactions of yeast and grapes. Phytism 18:29, 6 August 2007 (UTC)
Quote: The use of potatoes, water from potato boiling, eggs, or sugar in a bread dough accelerates the growth of yeasts. ... this is not true to my knowledge for eggs and household sugar (succrose). The fat from the yolk inhbits the yeast growth, and the household sugar does likewise by binding essential water to itself. So in fact eggs and household sugar inhibit the growth of yeasts. Maikel 01:00, 18 September 2007 (UTC)
The resulting bread would have been lighter and more tasty than the normal flat, hard cake.
The bolded bit is POV in my opinion. lol!! Jake the Editor Man ( talk) 17:00, 13 December 2007 (UTC)
i looked through quickly and I saw no mention of yeast's taste —Preceding unsigned comment added by Phil Ian Manning ( talk • contribs) 12:32, 2 January 2008 (UTC)
Your more than welcome to go taste some... People don't normally eat plain yeast though... so I'm not sure it matters. —Preceding unsigned comment added by Frupert ( talk • contribs) 09:53, 10 June 2008 (UTC) The taste is important for beer and wine brewers. Over-fermented wine tastes, well, yeasty. — Preceding unsigned comment added by Dnlprck ( talk • contribs) 07:07, 20 April 2011 (UTC)
I found part of this part quite confusing to read, esp the "low ph (5.0 or lower)" which is at the first sentence.
Now I do realize what it means now, but I still suggest a rephrase of the phrase in the bracket...
How about (Numerically 5.0 or higher) —Preceding unsigned comment added by Wiknerd ( talk • contribs) 17:49, 6 May 2008 (UTC)
I've removed "Yeast is ver important to everyday life, men need it for beer and woen need it for wine, children need it to do experiments and it can be v" As it sounds like it was written by a two year old, makes no sense, and is most likely vandalism : D ~Frupert —Preceding unsigned comment added by Frupert ( talk • contribs) 09:11, 10 June 2008 (UTC)
Does yeasts have some intrinsic trait that qualifies a particular species as being a "yeast" rather than just generically being a "fungus"? What is special about all (or most) of the species of yeast that qualifies them as yeasts? -- Alecmconroy ( talk) 15:05, 2 July 2008 (UTC)
I believe that the term yeast is given to any fungus that exhibits a unicellular nonfilamentous (or nonmycelial) growth form. There are fungi that can grow unicellularly or as a mycelium, and they are usually referred to as dimorphic. Woodlore ( talk) —Preceding comment was added at 23:32, 9 July 2008 (UTC)
In the interest of fairness, if there is a section on kombucha, there should be one on kefir as well. elpincha ( talk) 17:30, 26 September 2008 (UTC)
From doing some reading there is a lot of information out there not currently included in the article. Here are some sources which could be incorporated:
Population genomics of domestic and wild yeasts - discussing the domestication of brewer's yeast
Smartse ( talk) 21:20, 14 February 2010 (UTC)
And another:
{{
cite journal}}
: Cite journal requires |journal=
(
help)SmartSE ( talk) 13:25, 20 January 2011 (UTC)
food safety, to distiguish its alternatives
--
222.67.217.239 (
talk)
10:21, 18 March 2010 (UTC)
Let the topic Ω — Yeast
--
222.64.27.154 (
talk)
02:06, 20 March 2010 (UTC)
-- 222.64.27.154 ( talk) 02:13, 20 March 2010 (UTC)
Additional info
-- 222.67.217.239 ( talk) 10:30, 18 March 2010 (UTC)
-- 222.67.217.239 ( talk) 10:38, 18 March 2010 (UTC)
-- 222.67.217.239 ( talk) 10:43, 18 March 2010 (UTC)
-- 222.64.27.154 ( talk) 02:23, 20 March 2010 (UTC)
It looks that few of the publications are there probably due to the fact that baker's yeast is heat resistant
-- 124.78.215.31 ( talk) 08:19, 20 March 2010 (UTC)
Does Yeast contain Starch or Glycogen? Interesting Question. —Preceding unsigned comment added by 86.152.45.91 ( talk) 14:34, 21 January 2011 (UTC)
![]() |
An image used in this article,
File:Marmite.jpg, has been nominated for deletion at
Wikimedia Commons in the following category: Deletion requests October 2011
Don't panic; a discussion will now take place over on Commons about whether to remove the file. This gives you an opportunity to contest the deletion, although please review Commons guidelines before doing so.
This notification is provided by a Bot -- CommonsNotificationBot ( talk) 12:17, 19 October 2011 (UTC) |
I have to question the logic and accuracy of this statement. I think the author meant to say that rising time was cut in half. Baking time would remain the same. — Preceding unsigned comment added by VaxAlpha ( talk • contribs) 18:53, 19 November 2011 (UTC)
The article refers in yeast#wine and the caption to the figure to yeasts on the surface of grapes forming a visible bloom. This is incorrect, although it may be a common misconception. The bloom has nothing whatsoever to do with yeast - it is caused by epicuticular wax crystals that are naturally secreted by the epidermis of the grape. Yeast is naturally present on the surfaces of grapes but not in sufficient numbers to form a visible coating. I suggest the article should be modified to remove this error. see e.g. Koch, K. and Ensikat, H.-J. The hydrophobic coatings of plant surfaces: epicuticular wax crystals and their morphologies, crystallinity and molecular self-assembly. Micron, 39, 759-772. Plantsurfer ( talk) 11:01, 6 April 2012 (UTC)
"A weak solution of water and sugar." Solution of what in what? Should mean a small amount of yeast and undefined amount of sugar dissolved in water? Does yeast dissolve or rather disperge in water?
"... and then left to rise, sometimes until it has doubled in size." Linearly, means to the 8-fold volume? -- Helium4 ( talk) 17:21, 29 July 2012 (UTC)
See http://www.flickr.com/search/?q=yeast&l=cc
1. What is the most ideal temperature for yeast to rise in any situation?