J
John Ralph
Researcher at Great Lakes Bioenergy Research Center
Publications - 471
Citations - 46226
John Ralph is an academic researcher from Great Lakes Bioenergy Research Center. The author has contributed to research in topics: Lignin & Monolignol. The author has an hindex of 109, co-authored 442 publications receiving 39238 citations. Previous affiliations of John Ralph include Michigan State University & University of Wisconsin-Madison.
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Journal ArticleDOI
Lignin Biosynthesis and Structure
TL;DR: Lignin is the generic term for a large group of aromatic polymers resulting from the oxidative combinatorial coupling of 4-hydroxyphenylpropanoids, deposited predominantly in the walls of secondarily thickened cells, making them lignin-like polymers.
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Paving the Way for Lignin Valorisation: Recent Advances in Bioengineering, Biorefining and Catalysis.
Roberto Rinaldi,Robin Jastrzebski,Matthew T. Clough,John Ralph,Marco Kennema,Pieter C. A. Bruijnincx,Bert M. Weckhuysen +6 more
TL;DR: This review provides a “beginning‐to‐end” analysis of the recent advances reported in lignin valorisation, with particular emphasis on the improved understanding of lign in's biosynthesis and structure.
Journal ArticleDOI
Lignins: Natural polymers from oxidative coupling of 4-hydroxyphenyl- propanoids
John Ralph,Knut Lundquist,Gösta Brunow,Fachuang Lu,Hoon Kim,Paul F. Schatz,Jane M. Marita,Ronald D. Hatfield,Sally A. Ralph,Jorgen Holst Christensen,Wout Boerjan +10 more
TL;DR: A recent challenge to the currently accepted theory of chemically controlled lignification, attempting to bring lignin into line with more organized biopolymers such as proteins, is logically inconsistent with the most basic details of the structure.
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Formaldehyde stabilization facilitates lignin monomer production during biomass depolymerization
Li Shuai,Masoud Talebi Amiri,Ydna M. Questell-Santiago,Florent Héroguel,Yanding Li,Yanding Li,Hoon Kim,Hoon Kim,Richard Meilan,Clint Chapple,John Ralph,John Ralph,Jeremy S. Luterbacher +12 more
TL;DR: This paper reports that adding formaldehyde during biomass pretreatment produces a soluble lignin fraction that can be converted to guaiacyl and syringyl monomers at near theoretical yields during subsequent hydrogenolysis, three to seven times those obtained without formaldehyde.
Journal ArticleDOI
Repression of lignin biosynthesis promotes cellulose accumulation and growth in transgenic trees
Wenjing Hu,Scott A. Harding,Jrhau Lung,Jacqueline L. Popko,John Ralph,Douglas D. Stokke,Chung-Jui Tsai,Vincent L. Chiang +7 more
TL;DR: In this article, the expression of a lignin biosynthetic pathway gene Pt4CL1 encoding 4-coumarate:coenzyme A ligase (4CL) has been downregulated by antisense inhibition.