Talk:Lignin

This is the talk page for discussing improvements to the Lignin article.
This is not a forum for general discussion of the article's subject.

Put new text under old text. Click here to start a new topic.
New to Wikipedia? Welcome! Learn to edit; get help.

Article policies

Find sources: Google (books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL

Limnology and Oceanography Mid‑importance

	Oceans portal This article is part of the WikiProject Limnology and Oceanography to improve Wikipedia's coverage of the inland waters and marine environments. The aim is to write neutral and well-referenced articles on limnology- or oceanography-related topics, as well as to ensure that limnology and oceanography articles are properly categorized. Read Wikipedia:Contributing FAQ and leave any messages at the project talk page.Limnology and OceanographyWikipedia:WikiProject Limnology and OceanographyTemplate:WikiProject Limnology and OceanographyLimnology and Oceanography articles
Mid	This article has been rated as Mid-importance on the project's importance scale.

Chemicals Mid‑importance

	This article is within the scope of WikiProject Chemicals, a daughter project of WikiProject Chemistry, which aims to improve Wikipedia's coverage of chemicals. To participate, help improve this article or visit the project page for details on the project.ChemicalsWikipedia:WikiProject ChemicalsTemplate:WikiProject Chemicalschemicals articles
Mid	This article has been rated as Mid-importance on the project's importance scale.

Plants High‑importance

	Plants portal This article is within the scope of WikiProject Plants, a collaborative effort to improve the coverage of plants and botany on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PlantsWikipedia:WikiProject PlantsTemplate:WikiProject Plantsplant articles
High	This article has been rated as High-importance on the project's importance scale.

Wiki Education Foundation-supported course assignment[edit]

This article was the subject of a Wiki Education Foundation-supported course assignment, between 29 March 2021 and 15 June 2021. Further details are available on the course page. Student editor(s): Parkiski.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 00:06, 18 January 2022 (UTC)[reply]

Wiki Education Foundation-supported course assignment[edit]

This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): Awilson0.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 02:34, 17 January 2022 (UTC)[reply]

Buying lignin[edit]

Does anybody know where can I purchase lignin to analyze? I ordered some from Fisher, and it has huge background in Raman. I would like to try different source. Thanks! 21:27, 14 September 2007 (UTC)Lizardstone 21:27, 14 September 2007 (UTC)lizardstone[reply]

Kraft lignin may be hard to purchase since most of it is burned and there isn't much other use for it, despite a lot of effort. Lignosulfonate from the sulfite pulping process is more readily available. You could try contacting: [1] to request a sample. Silverchemist 01:36, 15 September 2007 (UTC)[reply]

Both these types of technical lignins are very different from natural lignin. I do not knew anyone selling natural lignin. The best is to prepare it yourself (there are descriptions in the litterature), or contact any academic department in wood chemistry - they mmight be able to help you. —Preceding unsigned comment added by 83.251.156.87 (talk) 16:18, 13 April 2008 (UTC)[reply]

Evolutionary origin[edit]

I'd love to see (and am incompetent to write) a section on the evolutionary history of lignin in this article. My hazy understanding is that lignin-producing plants originated in the Devonian and became widespread in the Carboniferous, but I'd like to know more about the evolutionary pressures that led to the development of lignin in the first place. arkuat (talk) 06:27, 2 June 2008 (UTC)[reply]

Eating Lignin[edit]

I arrived at this page from the Dietary Fiber entry hoping to learn more about food sources of Lignin and its effects on eaters. I hope somebody can contribute that to this article. Anotherviewkhh (talk) 00:20, 11 July 2010 (UTC)[reply]

The article indicates that lignin is not degraded by animal enzymes, so it cannot be absorbed into the bloodstream and has no direct nutritional value. If you Google the topic, you will find discussions of the beneficial effects of lignin on cows, but cows have rumens, and we dont. According to the lignin article, lignin actually detracts from the nutritional benefits of foods by blocking their absorption. The precursors to lignin, lignols are antioxidants and the type of things that certain food enthusiasts like to eat, but lignin cannot be reverted to lignols.--Smokefoot (talk) 13:40, 11 July 2010 (UTC)[reply]

Who determined the structure of plants ? Wow!! Does it "always look like that?"[edit]

That is one complicated molecule. The way it is presented in the article figure I assume that lignin is a well defined molecule (i.e. has that exact structure and does not normally appear as a range of MW variants like PEG). Anyone know if this is correct?Johnfravolda (talk) 18:21, 12 May 2011 (UTC)[reply]

Lignin is highly variable and the picture only represents an example of the entire molecule. It can be found in smaller fragments (mono-lignols) or huge structures. Native lignin is much larger than industrial lignin (Kraft etc). The MW is usually given as a broad range. Gibby is gibby (talk) 17:21, 31 January 2013 (UTC)[reply]

Rhodococcus jostii[edit]

identified as producing a lignin digesting enzyme, potentially increasing our capacity to produce biofuels from woody plant material.[2] [3](mercurywoodrose)75.61.141.184 (talk) 00:32, 12 June 2011 (UTC)[reply]

Degradation of Lignin while burning[edit]

This article does not mention the primary effect that burning lignin has on the flavor and/or aroma of food.Wjhonson (talk) 16:53, 8 July 2013 (UTC)[reply]

Composition[edit]

I would like to know what the elemental composition is – how much carbon, oxygen, and hydrogen. It probably varies from species to species, but can someone give us the ranges? Eric Kvaalen (talk) 20:13, 16 April 2014 (UTC)[reply]

This source [4] gives Carbon 63.4%, Hydrogen 5.9%, Oxygen 30.0%. Plantsurfer (talk) 08:06, 17 April 2014 (UTC)[reply]

External links modified[edit]

Hello fellow Wikipedians,

I have just modified 3 external links on Lignin. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

Added archive https://web.archive.org/web/20071009004745/http://www.lignin.org/whatis.html to http://www.lignin.org/whatis.html
Added archive https://web.archive.org/web/20120210165047/http://www.genesis.co.nz/Press+Releases/2007/GREEN+PLASTIC+PRODUCED+FROM+BIOJOULE+MATERIAL.html to http://www.genesis.co.nz/Press+Releases/2007/GREEN+PLASTIC+PRODUCED+FROM+BIOJOULE+MATERIAL.html
Added archive https://web.archive.org/web/20130731203227/http://www.flanderstoday.eu/content/news-brief-03042013 to http://www.flanderstoday.eu/content/news-brief-03042013

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 05:38, 23 December 2017 (UTC)[reply]

Angiosperm/Gymnosperm issue[edit]

The section describing the broad groupings of lignins by lignol source makes references to angiosperms as hardwoods and gymnosperms as softwoods/grasses. As a botanical definition this is incorrect because all grasses are angiosperms. I believe the wording of this section may be conflating the hard/soft wood as defined by industry (e.g., lumber, furniture, flooring) and the broad taxa encompassed by the gymnosperm and angiosperm groupings. I think it would be helpful to clarify the article by removing the references to gymnosperm and angiosperm. The softwood and hardwood grouping references can be left, perhaps with additional references to their common sources or features in usage. That seems like it would still adequately differentiate the two lignin groups involved without requiring a digression into the reproductive physiology of the source plant groups. Ajm1205 (talk) 00:50, 29 September 2022 (UTC)[reply]