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Sally A. Ralph
Researcher at United States Department of Agriculture
Publications - 65
Citations - 5221
Sally A. Ralph is an academic researcher from United States Department of Agriculture. The author has contributed to research in topics: Lignin & Raman spectroscopy. The author has an hindex of 30, co-authored 63 publications receiving 4602 citations. Previous affiliations of Sally A. Ralph include Great Lakes Bioenergy Research Center & United States Forest Service.
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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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FT-Raman Spectroscopy of Wood: Identifying Contributions of Lignin and Carbohydrate Polymers in the Spectrum of Black Spruce (Picea Mariana):
Umesh P. Agarwal,Sally A. Ralph +1 more
TL;DR: In this paper, the spectral features of black spruce (Picea mariana) wood were associated with lignin and/or carbohydrate polymers, namely cellulose and hemicellulose.
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Cellulose I crystallinity determination using FT–Raman spectroscopy: univariate and multivariate methods
TL;DR: In this article, two new methods based on FT-Raman spectroscopy, one simple, based on band intensity ratio, and the other using a partial least squares (PLS) regression model, are proposed to determine cellulose I crystallinity.
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Effects of Coumarate 3-Hydroxylase Down-regulation on Lignin Structure
John Ralph,John Ralph,Takuya Akiyama,Hoon Kim,Hoon Kim,Fachuang Lu,Fachuang Lu,Paul F. Schatz,Jane M. Marita,Sally A. Ralph,M. S. Srinivasa Reddy,Fang Chen,Richard A. Dixon +12 more
TL;DR: NMR revealed structural differences in the interunit linkage distribution that characterizes a lignin polymer that form a basis for explaining differences in digestibility and pulping performance of C3H-deficient plants.
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Tricin, A Flavonoid Monomer in Monocot Lignification
Wu Lan,Fachuang Lu,Matthew R. Regner,Yimin Zhu,Jorge Rencoret,Sally A. Ralph,Uzma I. Zakai,Kris Morreel,Wout Boerjan,John Ralph +9 more
TL;DR: Nuclear magnetic resonance characterization of gel permeation chromatography-fractionated acetylated maize (Zea mays) lignin revealed that the tricin moieties are found in even the highest molecular weight fractions, ether linked to lignIn units, demonstrating that tricIn is indeed incorporated into the lign in polymer.