Wood chemistry (8) Lignin

Throughout history, we have used wood in our everyday life to make fire, create tools, build shelters and more recently to make paper and engineered wood products. Wood allows for modern ways of construction using sustainable resources and its ability to store carbon contributes to our fight against global warming. As ordinary as it may seem, wood is actually an extremely complex composite material with unique features. In order to utilize the full potential of wood, it is essential that we understand its hierarchical, anatomical and chemical structure, the material behavior that results from its complex built-up and the environmental impact of wood products. This is why we created these short series that highlight the various aspects of wood.
The lecturer in this series is Prof. Dr. Callum Hill. He has been a senior lecturer in wood science at Bangor University and a Professor of Materials Science at the Centre for Timber Engineering, Edinburgh. He is now a Senior Visiting Research Fellow at the University of Bath and a Visiting Researcher at the Norwegian Institute of Bioeconomy Research and has his own consultancy that deals with life cycle assessment, carbon footprinting and sustainability assessments.
The videos were produced at Aalto University in Finland under the direction of Prof. Dr. Lauri Rautkari, who is leading the Wood Material Science and Technology research group (www.aalto.fi/e.... The videos are part of an open access Wood Science course (openlearning.a...) at the Aalto OpenLearning platform, designed by Lauri Rautkari, Michael Altgen and Daniela Altgen.
The videos were shot and edited by filmmaker Tone Anderson.
Keywords:
Cellulose, hemicellulose, lignin, pectin, sugars, glucose, starch, mannose, cellobiose, hydroxyl groups, hydrogen bonding, coniferyl, p-coumaryl , syringyl, guaicyl, cell wall, cell wall matrix

[@markwalker5295]

Question:
"The nature of lignin itself also has a great influence on the degradation behaviour function of fungi, for lignin is not a well defined chemical substance but rather a heterogeneous class of compounds (Otter 1996). Of these, the two phenylpropanoid units guaiacyl and syringyl are the most important monomers in the lignin of trees. Conifer wood lignin consists almost exclusively of guaiacyl monomers, whereas hardwood lignin consists of approximately equal portions of guaiacyl and syringyl (Whetten and Sederoff 1995)." F.W.M.R. Schwarze.
Where in the process of the formation of the two types of lignin does the above text relate, in relation the the described three fundamental building blocks of this video?

[@bluekenya4825]

It would help much if you avoided using dark pens against a dark background while wearing dark clothing.

[@jjj87484]

Im colorblind and this is a nightmare to watch

[@rachelandrafaniaofficial1109]

thank for the explanation Prof 😊

[@TrustintheSon1]

Is this guy writing backwards?

[@SetTheCurve]

Film a mirror reflecting a man in back of a window

[@Theclergymane]

@@SetTheCurvey’all some real ones

[@Acceleratedpayloads]

@1:10 talk amongs yourselves
Me: 😐

[@xtineawelo4349]

I can't see what you are writing but your lectures seems interesting, please improvement on your background colour

[@duncansteward4331]

brings back times from the 1970s at University

[@fredoindakut]

I’m curious of it in the body as well as cellucose

[@quocvytruong6462]

thank a lot for the lecture!

[@RGK147]

lignin the older brother of ligma

[@iMyriadFM]

Sinapyl C₁₁H₁₄O₄ -o6+ O4