Kevin M. Holtman

Works (5)

Updated: July 5th, 2023 16:00

2007 journal article

An NMR comparison of the whole lignin from milled wood, MWL, and REL dissolved by the DMSO/NMI procedure

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 27(3-4), 179–200.

By: K. Holtman*, H. Chang n & J. Kadla*

author keywords: lignin isolation; milled wood lignin (MWL); residual enzyme lignin (REL); HMQC NMR spectroscopy; quantitative C-13 NMR spectroscopy; GPC
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Quantitative C-13 NMR characterization of milled wood lignins isolated by different milling techniques

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 26(1), 21–34.

By: K. Holtman n, H. Chang n, H. Jameel n & J. Kadla*

author keywords: lignin; characterization; quantitative C-13 NMR; milled wood lignin (MWL); vibratory ball-milling; rotary ball-milling
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Solution-state nuclear magnetic resonance study of the similarities between milled wood lignin and cellulolytic enzyme lignin

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 52(4), 720–726.

By: K. Holtman n, H. Chang n & J. Kadla n

author keywords: lignin; lignin isolation; milled wood lignin (MWL); cellulolytic enzyme lignin (CEL); HMQC NMR spectroscopy; quantitative C-13 NMR spectroscopy; thioacidolysis; GPC
MeSH headings : Carbon / analysis; Cell Wall / chemistry; Cellulase / metabolism; Hydrogen / analysis; Lignin / chemistry; Magnetic Resonance Spectroscopy; Molecular Structure; Molecular Weight; Solutions; Wood
TL;DR: Carohydrate analysis revealed that the MWL may contain a higher proportion of middle lamella material as compared to the CEL, which could explain the differences in beta-O-4' and degree of condensation. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2003 journal article

Elucidation of lignin structure through degradative methods: Comparison of modified DFRC and thioacidolysis

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 51(12), 3535–3540.

By: K. Holtman n, H. Chang n, H. Jameel n & J. Kadla n

author keywords: lignin thioacidolysis; derivatization followed by reductive cleavage (DFRC); HMQC NMR spectroscopy; milled wood lignin (MWL); GPC; beta-O-4 linkages
MeSH headings : Chemistry, Organic / methods; Chromatography, Gas / methods; Lignin / chemistry; Magnetic Resonance Spectroscopy / methods; Oxidation-Reduction; Wood
TL;DR: Results indicate that the DFRC method does not completely or efficiently degrade the lignin polymer, and indicates inefficiency in the chemistry of the method, probably due to steric constraints of the polymeric nature of lignIn. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2002 journal article

Studies on the effect of ball milling on lignin structure using a modified DFRC method

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 50(1), 129–135.

By: T. Ikeda  n, K. Holtman n, J. Kadla n, H. Chang n & H. Jameel n

author keywords: aryl other bonds; milled wood lignin (MWL); cellulolytic enzyme lignin (CEL); ball milling; native lignin; structure
MeSH headings : Chemistry, Organic / methods; Chromatography, Gas / methods; Lignin / chemistry; Molecular Structure; Oxidation-Reduction; Pinus / chemistry; Plant Extracts / chemistry; Wood
TL;DR: Results show that MWL and CEL are structurally identical, with an increased phenolic beta-O-4 content compared to that of the original Wiley milled wood, which indicates that the portion of lignin linked to carbohydrates and that not linked to carbohydrate are structural the same. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

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