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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
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Umesh Agarwal
Umesh Agarwal

Umesh P. Agarwal

Fiber and Chemical Sciences Research
Unit: FPL-4709
Research Chemist
One Gifford Pinchot Drive
Madison, WI
United States
53726-2398

Phone: 608-231-9441
uagarwal@fs.fed.us

Current Research

Current research interests are extended in a number of areas. The focus is on both applied and fundamental investigations. Understanding the roles of lignin and cellulose-crystallinity in the enzyme hydrolysis of wood is an area that will have impact on the biofuel economy. Advances in wood cell wall nanostructure will permit better understanding of the complex ultrastructural interactions incorporating cellulose nanofibril, hemicellulose and lignin. Past and ongoing Raman spectroscopy research at FPL has made it possible to obtain useful information when cellulose and lignin based materials are analyzed. Such analysis can now be carried out both at macro- and micro-levels. For determining the crystallinities of nano-celluloses and other cellulose containing materials, including wood, development of new methods based on Raman spectroscopy is an active area of research. For lignin analysis, a new method based on use of silver metal particles was recently developed that lets trace amounts of lignin to be detected. Development and utilization of Raman spectroscopy for characterization of cellulose nanomaterials and their composites is an area of interest. Lastly, the objective of the Raman database project is to generate information from the lignin models that will help decipher lignin spectrum in a material.


Research Interest

  • Understanding roles of lignin and cellulose-crystallinity in enzyme hydrolysis of wood
  • Wood cell wall nanostructure
  • Advancing Raman spectroscopy for characterzation of nanocelluloses, nanocellulose composites, and woody tissue
  • Methods for estimating crystallinity of cellulose containing materials
  • Using nano- and micro-particles of silver and other metals in lignin analysis
  • Raman database of lignin model compounds and spectral interpretation


Research Importance

Understanding roles of lignin and cellulose-crystallinity in enzyme hydrolysis of wood: For the conversion of wood to ethanol, the enzymatic hydrolysis of cellulose via glucose and fermentation is one of the most practical approaches and therefore, is an important area of research. Cellulose and lignin are essential components of wood but due to the inaccessibility of cellulose to enzymes within the complex cell wall matrix cellulose is not easily hydrolyzed. In addition to accessibility to cellulose its crystallinity remains an issue. Therefore, effects of cellulose crystallinity and lignin removal are two factors important that need to be the focus of investigation.Wood cell wall nanostructure: The problem of composition and architecture of wood cell wall is an important research topic and efforts over the years have revealed that the ultrastructure is complex and remains inadequately understood. The research objectives of the project “understanding the nanostructure of the wood cell wall” consist of (1) characterizing, non-invasively, plant cell wall in a number of tissue types, at the molecular level using Raman mapping and (2) understanding distribution and organization of lignin and cellulose in various morphological regions of woody tissues. The findings are expected to have important implications for several areas of research. A few examples of where such information may be of significance are, “structure-property relationships of cell-wall and wood-fiber”, “lignin biosynthesis and topochemistry”, and “deconstruction of plant cell walls” (where the recalcitrance of plant biomass to degradation is a function of how polymers crosslink and aggregate within walls). Advancing Raman spectroscopy for characterizing, nanocelluloses, nanocellulose-polymer composites, and woody tissue: Cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) are important new materials in field of cellulose science and technology. These materials have generated remarkable excitement in the scientific community. The materials have unique physicochemical properties and have been used as reinforcing components in nanocomposites. Additional benefits arise from the fact that they are derived from the biomass that is both renewable and sustainable. Methods for accurately estimating crystallinity of nanocelluloses and cellulose containing materials: Crystallinity has an important effect on the physical, mechanical, and chemical properties of cellulose based materials. Raman spectroscopy has become an important analytical technique for nondestructive, qualitative, and quantitative analysis of cellulose-containing materials. Recent research performed in the scientist's group has shown it is possible to develop Raman spectroscopy based methods to accurately estimate crystallinity of plant based biomaterials. However, further research is needed to fully develop this approach and address a number of remaining issues. Using nano- and micro-particles of silver and other metals in lignin analysis: Because of the heterogeneous nature of lignin structure, the structures of lignins have proven to be difficult to study even in their native states. Lack of detailed information on lignin structures has hindered progress in a number of science and technology fields. Although a number of Raman techniques have been used to study lignin, the focus under this project is to develop Surface-enhanced Raman scattering (SERS) for this purpose. Raman database of lignin model compounds and spectral interpretation: The objective is to develop a Raman database of lignin model compounds which will be ideal for interpretation and classification of spectra of lignins and/or lignocellulosics. Such information is deemed essential for analyzing the spectra of woods and other lignin containing materials.


Below are the 83 US Forest Service publications sorted by year. You may re-sort the list by: Title, Date Posted, Category, Publication or Year.

Publication Year: 2018
 
Title: Current characterization methods for cellulose nanomaterials
Source: Chemical Society Reviews. 47(8): 2609-2679.
Author(s) Foster, E. Johan; Moon, Robert J.; Agarwal, Umesh P.; Bortner, Michael J.; Bras, Julien ; Camarero-Espinosa, Sandra ; Chan, Kathleen J.; Clift, Martin J. D.; Cranston, Emily D.; Eichhorn, Stephen J.; Fox, Douglas M.; Hamad, Wadood Y.; Heux, Laurent ; Jean, Bruno ; Korey, Matthew ; Nieh, World ; Ong, Kimberly J.; Reid, Michael S.; Renneckar, Scott ; Roberts, Rose ; Shatkin, Jo Anne; Simonsen, John ; Stinson-Bagby, Kelly ; Wanasekara, Nandula ; Youngblood, Jeff
Year: 2018   view abstract, download publication »
Title: New cellulose crystallinity estimation method that differentiates between organized and crystalline phases
Source: Carbohydrate Polymers. 190: 262-270.
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Reiner, Richard S.; Baez, Carlos
Year: 2018   view abstract, download publication »
Title: Performance of high lignin content cellulose nanocrystals in poly(lactic acid)
Source: Polymer. 135: 305-313.
Author(s) Wei, Liqing; Agarwal, Umesh P.; Matuana, Laurent; Sabo, Ronald C.; Stark, Nicole M.
Year: 2018   view abstract, download publication »
Title: The nanostructures of native celluloses, their transformations upon isolation, and their implications for production of nanocelluloses
Source: In: ACS symposium series. Washington, D.C.: American Chemical Society: 18 p. Chapter 1.
Author(s) Atalla, Rajai H.; Atalla, Rowan S; Agarwal, Umesh P.
Year: 2018   view abstract, download publication »
Publication Year: 2017
 
Title: Chemical modification of nanocellulose with canola oil fatty acid methyl ester
Source: Carbohydrate Polymers. 169(2017): 108-116
Author(s) Wei, Liqing; Agarwal, Umesh P.; Hirth, Kolby C.; Matuana, Laurent M.; Sabo, Ronald C.; Stark, Nicole M.
Year: 2017   view abstract, download publication »
Title: Effect of sample moisture content on XRD-estimated cellulose crystallinity index and crystallite size
Source: Cellulose. 24(5): 1971-1984.
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Baez, Carlos; Reiner, Richard S.; Verrill, Steve P.
Year: 2017   view abstract, download publication »
Title: Nanocomposites from lignin-containing cellulose nanocrystals and poly(lactic acid)
Source: In: Society of Plastic Engineers, ISBN: 978-0-692-88309-9: Paper prepared for: ANTEC® 2017. Anaheim, CA. 5 p.
Author(s) Wei, Liqing; Agarwal, Umesh; Stark, Nicole; Sabo, Ronald
Year: 2017   view abstract, download publication »
Title: Preparation and characterization of the nanocomposites from chemically modified nanocellulose and poly(lactic acid)
Source: Journal of Renewable Materials. 5(5): 410-422.
Author(s) Wei, Liqing; Luo, Shupin; McDonald, Armando G.; Agarwal, Umesh P.; Hirth, Kolby C.; Matuana, Laurent M.; Sabo, Ronald C.; Stark, Nicole M.
Year: 2017   view abstract, download publication »
Title: Production of Cellulose Nanocrystals from Raw Wood Via Hydrothermal treatment
Source: U.S. Patent
Author(s) Agarwal, Umesh; Ralph, Sally; Reiner, Richard; Baez, Carlos
Year: 2017   view abstract, download publication »
Title: Raman spectroscopy in the analysis of cellulose nanomaterials
Source: In: Nanocelluloses: their preparation, properties, and applications, ACS symposium series. Washington, D.C.: American Chemical Society: 75-91. Chapter 4.
Author(s) Agarwal, Umesh P.
Year: 2017   view abstract, download publication »
Title: Raman spectroscopy of CNC-and CNF-based nanocomposites
Source: In: Handbook of Nanocellulose and Cellulose Nanocomposites. John Wiley & Sons: 609-625. Chapter 18.
Author(s) Agarwal, Umesh P.
Year: 2017   view abstract, download publication »
Title: Using a fully recyclable dicarboxylic acid for producing dispersible and thermally stable cellulose nanomaterials from different cellulosic sources
Source: Cellulose. 24(6): 2483-2498.
Author(s) Jia, Chao; Chen, Liheng; Shao, Ziqiang; Agarwal, Umesh P.; Hu, Liangbing; Zhu, J. Y.
Year: 2017   view abstract, download publication »
Publication Year: 2016
 
Title: Probing crystallinity of never-dried wood cellulose with Raman spectroscopy
Source: Cellulose
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Reiner, Richard S.; Baez, Carlos
Year: 2016   view abstract, download publication »
Title: Techniques for characterizing lignin
Source: Lignin in Polymer Composites
Author(s) Stark, Nicole M.; Yelle, Daniel J.; Agarwal, Umesh P.
Year: 2016   view abstract, download publication »
Publication Year: 2015
 
Title: Comparison of Cellulose Supramolecular Structures Between Nanocrystals of Different Origins
Source: Proceedings of the 18th ISWFPC (International Symposium on Wood, Fiber, and Pulping Chemistry) held in Vienna (Sept 9 -11, 2015). 2015; pp. 6-9.
Author(s) Agarwal, Umesh P.; Reiner, Richard S.; Hunt, Christopher G.; Catchmark, Jeffery; Foster, E. Johan; Isogai, Akira
Year: 2015   view abstract, download publication »
Title: Estimation of S/G ratio in woods using 1064 nm FT-Raman spectroscopy
Source: Proceedings of the 18th ISWFPC (International Symposium on Wood, Fiber, and Pulping Chemistry) held in Vienna (Sept 9 -11, 2015). 2015; pp. 333-336.
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Padmakshan, Dharshana; Liu, Sarah; Karlen, Steven D.; Foster, Cliff; Ralph, John
Year: 2015   view abstract, download publication »
Title: Formation of Irreversible H-bonds in Cellulose Materials
Source: Proceedings of the 18th ISWFPC (International Symposium on Wood, Fiber, and Pulping Chemistry) held in Vienna (Sept 9 -11, 2015). 2015; pp. 18-21.
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Reiner, Rick S.; Stark, Nicole M.
Year: 2015   view abstract, download publication »
Title: New Model of Wood Cell Wall Microfibril and Its Implications
Source: Proceedings of the 18th ISWFPC (International Symposium on Wood, Fiber, and Pulping Chemistry) held in Vienna (Sept 9 -11, 2015). pp. 142-145.
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Reiner, Rick S.; Baez, Carlos
Year: 2015   view abstract, download publication »
Title: Tailoring the yield and characteristics of wood cellulose nanocrystals (CNC) using concentrated acid hydrolysis
Source: Cellulose
Author(s) Chen, Liheng; Wang, Qianqian; Hirth, Kolby; Baez, Carlos; Agarwal, Umesh P.; Zhu, J. Y.
Year: 2015   view abstract, download publication »
Publication Year: 2014
 
Title: 1064nm FT-Raman spectroscopy for investigations of plant cell walls and other biomass materials
Source: Frontiers in Plant Science, Plant Biophysics and Modeling, September 2014, Volume 5, Article 490, 2014; 12 p.
Author(s) Agarwal, Umesh P.
Year: 2014   view abstract, download publication »
Title: Impacts of fiber orientation and milling on observed crystallinity in jack pine
Source: Wood Sci Technol, February 6, 2014; 15 p.
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Reiner, Richard S.; Moore, Roderquita K.; Baez, Carlos
Year: 2014   view abstract, download publication »
Title: On the conflicting findings of Role of Cellulose-Crystallinity in Enzume Hydrolysis of Biomass
Source: Prepr. Pap.-Am. Chem. Soc., Div. Energy Fuels 2014, Volume 59, Number 1, 2014; pp. 712-715.
Author(s) Agarwal, Umesh; Ralph, Sally
Year: 2014   view abstract, download publication »
Publication Year: 2013
 
Title: A comparative study of cellulose nanofibrils disintegrated via multiple processing approaches
Source: Carbohydrate Polymers, Volume 97, 2013; pp. 226-234.
Author(s) Qing, Yan; Sabo, Ronald; Zhu, J.Y.; Agarwal, Umesh; Cai, Zhiyong; Wu, Yiqiang
Year: 2013   view abstract, download publication »
Title: Chapter 1.1 Crystallinity of Nanocellulose Materials by Near-IR FT-Raman Spectroscopy
Source: In: Production and applications of Cellulose nanomaterials, TAPPI Press, Chapter 1.1, 2013; pp. 43-44.
Author(s) Agarwal, Umesh P.; Reiner, Richard S.; Ralph, Sally A.
Year: 2013   view abstract, download publication »
Title: Chapter 1.4: Spatially Resolved Characterization of CNC-Polypropylene composite by Confocal Raman Microscopy
Source: In: Production and applications of Cellulose Nanomaterials, Chapter 1.4, TAPPI Press. 2013; pp. 113-114.
Author(s) Agarwal, Umesh; Sabo, Ronald; Reiner, Richard; Clemons, Craig; Rudie, Alan
Year: 2013   view abstract, download publication »
Title: Enzymatic hydrolysis of loblolly pine: effects of cellulose crystallinity and delignification
Source: Holzforschung 2013; Volume 67, Number 4: 2013; pp. 371–377.
Author(s) Agarwal, Umesh P.; Zhu, J.Y.; Ralph, Sally A.
Year: 2013   view abstract, download publication »
Title: Estimation of Cellulose Crystallinity of Lignocelluloses Using Near-IR FT-Raman Spectroscopy and Comparison of the Raman and Segal-WAXS Methods
Source: J. Agric. Food Chem. Volume 61, 2013; pp. 103-113.
Author(s) Agarwal, Umesh P.; Reiner, Richard R.; Ralph, Sally A.
Year: 2013   view abstract, download publication »
Publication Year: 2012
 
Title: Spatially Resolved Characterization of Cellulose Nanocrystal-Polypropylene Composite by Confocal Raman Microscopy
Source: Applied Spectroscopy, Volume 66, Number 7, 2012
Author(s) Agarwal, Umesh P.; Sabo, Ronald; Reiner, Richard S.; Clemons, Craig M.; Rudie, Alan W.
Year: 2012   view abstract, download publication »
Title: Thermal Conversion of Pine Wood Char to Carbon Nanomaterials in the Presence of Iron Nanoparticles
Source: Forest Prod. J. Volume 62, Number 6, 2012; pp.462–466.
Author(s) Mun, Sung Phil; Cai, Zhiyong; Watanabe, Fumiya; Agarwal, Umesh P.; Zhang, Jilei
Year: 2012   view abstract, download publication »
Publication Year: 2011
 
Title: Cellulose crystallinity of woods, wood pulps, and agricultural fibers by FT-Raman Spectroscopy
Source: In: Proceedings 16th international symposium on wood, fiber and pulping chemistry. 2011 June 8-10. Tianjin, China. Beijing, China: China Light Industry Press: 69-74. 2011
Author(s) Agarwal, Umesh P.; Reiner, Richard R.; Ralph, Sally A.
Year: 2011   view abstract, download publication »
Title: Enzymatic hydrolysis of biomass: Effects of crystallinity, particle size, and lignin removal
Source: In: Proceedings 16th international symposium on wood, fiber and pulping chemistry. 2011 June 8-10. Tianjin, China. Beijing, China: China Light Industry Press: 910-914. 2011
Author(s) Agarwal, Umesh P.; Zhu, J.Y.; Ralph, Sally A.
Year: 2011   view abstract, download publication »
Title: FT-Raman Investigation of Milled-Wood Lignins: Softwood, Hardwood, and Chemically Modified Black Spruce Lignins
Source: Journal of Wood Chemistry and Technology, 31:324-344, 2011
Author(s) Agarwal, Umesh P.; McSweeny, James D.; Ralph, Sally A.
Year: 2011   view abstract, download publication »
Title: Lignin quantitation by FT-Raman Spectroscopy
Source: In: Proceedings 16th international symposium on wood, fiber and pulping chemistry. 2011 June 8-10. Tianjin, China. Beijing, China: China Light Industry Press: 170-173. 2011
Author(s) Agarwal, Umesh P.
Year: 2011   view abstract, download publication »
Title: Restructuring the Crystalline Cellulose Hydrogen Bond Network Enhances Its Depolymerization Rate
Source: J. Am. Chem. Soc. 2011, 133, 11163-11174; 2011
Author(s) Chundawat, Shishir P.S.; Belesia, Giovanni; Uppugundla, Nirmal; Sousa, Leonardo da Costa; Gao, Dahai; Cheh, Albert M.; Agarwal, Umesh P.; Bianchetti, Christopher M.; Phillips, Jr., George N.; Langan, Paul; Balan, Venkatesh; Gnanakran, S.; Dale, Bruce E.
Year: 2011   view abstract, download publication »
Publication Year: 2010
 
Title: Advancing Raman Spectroscopy for Lignin Applications
Source: In: Proceedings 4th International Symposium on Emerging Technologies of Pulping and Papermaking, November 8-11, 2010, South China University of Technology Press, Guangzhou, China, pp. 319-322; CD ISBN # 978-7-900759-122 ; 2010
Author(s) Agarwal, Umesh P.
Year: 2010   view abstract, download publication »
Title: Cellulose I crystallinity determination using FT-Raman spectroscopy: univariateand multivariate methods
Source: Cellulose (2010) 17:721-733; 2010
Author(s) Agarwal, Umesh P.; Reiner, Richard S.; Ralph, Sally A.
Year: 2010   view abstract, download publication »
Title: Crystallinities of Nanocrystalline and Nanofibrillated Celluloses by FT-Raman Spectroscopy
Source: In: Proceedings of the 2010 TAPPI International Conference on Nanotechnology for the Forest Product Industry, Sept 27-29, 2010 Espoo, Finland.
Author(s) Agarwal, Umesh P.; Reiner, Richard S.; Filpponen, Ilari; Isogai, Akira; Argyropoulos, Dimitris S.
Year: 2010   view abstract, download publication »
Title: Vibrational Spectroscopy Chapter 4
Source: In: Lignin and Lignans: Advances in Chemistry; pp. 103-136; 2010
Author(s) Agarwal, Umesh P.; Atalla, Rajai H.
Year: 2010   view abstract, download publication »
Publication Year: 2009
 
Title: Determination of Cellulose I Crystallinity by FT-Raman Spectroscopy
Source: In: Proceedings of the 15th International Symposium on Wood, Fiber and Pulping Chemistry, Oslo, Norway (June 15-18, 2009). Paper number: P-053_ISWFPC_Cellulose_Crystallinity. Oslo, Norway : Congress-Conference AS, 2009. 1 flash drive.
Author(s) Agarwal, U.P.; Reiner, R.S.; Ralph, S.A.
Year: 2009   view abstract, download publication »
Title: Near-IR surface-enhanced Raman spectrum of lignin
Source: J. Raman Spectrosc. 2009, 40, 1527-1534; 2009
Author(s) Agarwal, Umesh P.; Reiner, Richard S.
Year: 2009   view abstract, download publication »
Title: Raman Analysis and Maping of Cellulose nanocrystal Polypropylene Composite
Source: In: Proceedings of the 15th International Symposium on Wood, Fiber and Pulping Chemistry, Oslo, Norway (June 15-18, 2009). Paper number: P-131_ISWFPC_Nano_composite_mapping. Oslo, Norway : Congress-Conference AS, 2009. 1 flash drive.
Author(s) Agarwal, U.P.; Sabo, R.; Reiner, R.S.; Clemons, C.M.; Rudie, A.W.
Year: 2009   view abstract, download publication »
Title: Surface Enhanced Raman Spectroscopy for Lignin Analysis
Source: In: Proceedings of the 15th International Symposium on Wood, Fiber and Pulping Chemistry, Oslo, Norway (June 15-18, 2009). Paper number: O-003_ISWFPC_SERS. Oslo, Norway : Congress-Conference AS, 2009. 1 flash drive.
Author(s) Agarwal, U. P.; Reiner, R.S.; Beecher, J.F.
Year: 2009   view abstract, download publication »
Publication Year: 2008
 
Title: Determination of ethylenic residues in wood and TMP of spruce by FT-Raman spectroscopy
Source: Holzforschung. Vol. 62, no. 6 (Nov. 2008): Pages 667-675.
Author(s) Agarwal, Umesh P.; Ralph, Sally A.
Year: 2008   view abstract, download publication »
Title: Raman spectroscopic characterization of wood and pulp fibers
Source: Characterization of lignocellulosic materials. Oxford, UK ; Ames, Iowa : Blackwell, 2008: Pages [17]-35.
Author(s) Agarwal, Umesh Prasad
Year: 2008   view abstract, download publication »
Publication Year: 2007
 
Title: Higher acid-chlorite reactivity of cell corner middle lamella lignin in black spruce
Source: Proceedings of the 14th International Symposium on Wood Fibre and Pulping Chemistry, held in Durban, South Africa, Technical Association of the Pulp and Paper Industry, TAPPSA, 6/25-6/28/2007. [S.l. : s.n.], 2007: [6] p.
Author(s) Agarwal, Umesh P.
Year: 2007   view abstract, download publication »
Title: Revealing organization of cellulose in wood cell walls by Raman imaging
Source: Proceedings of the 14th International Symposium on Wood Fibre and Pulping Chemistry, held in Durban, South Africa, Technical Association of the Pulp and Paper Industry, TAPPSA, 6/25-6/28/2007. [S.l. : s.n.], 2007: [8] pages
Author(s) Agarwal, Umesh P.; Ralph, Sally A.
Year: 2007   view abstract, download publication »
Publication Year: 2006
 
Title: Raman imaging to investigate ultrastructure and composition of plant cell walls : distribution of lignin and cellulose in black spruce wood (Picea mariana)
Source: Planta. Vol. 222 (2006): pages 1141-1153.
Author(s) Agarwal, Umesh P.
Year: 2006   view abstract, download publication »
Title: Using nano- and micro-particles of silver in lignin analysis
Source: 2006 TAPPI International Conference on Nanotechnology : April 26-28, 2006, Atlanta, Georgia. Atlanta, GA : TAPPI Press, c2006: [11] pages.
Author(s) Agarwal, Umesh P.; Reiner, Richard S.; Ralph, Sally A.
Year: 2006   view abstract, download publication »
Title: Using Nano- and Micro-Particles of Silver in Lignin Analysis
Source: In: Proceedings of the 2006 TAPPI Intl Conf on Nanotechnology; CD (TAPPI Press) of the TAPPI
Author(s) Agarwal, Reiner, Ralph; Richard S. Reiner; Sally A. Ralph
Year: 2006   view abstract, download publication »
Publication Year: 2005
 
Title: 'Self-absorption' phenomenon in near-infrared Fourier transform Raman spectroscopy of cellulosic and lignocellulosic materials
Source: Applied spectroscopy. Vol. 24, no. 3 (2005): Pages 385-388.
Author(s) Agarwal, Umesh P.; Kawai, Nancy
Year: 2005   view abstract, download publication »
Title: Paper Permanence
Source: USDA Forest Service, Forest Products Laboratory, Techlines, 2005
Author(s) Agarwal, Umesh P.
Year: 2005   view abstract, download publication »
Title: Predicting photoyellowing behaviour of mechanical pulp containing papers
Source: Proceedings of the 59th APPITA Annual Conference and Exhibition incorporating the 13th ISWFPC (International Symposium on Wood, Fibre, and Pulping Chemistry), held in Auckland, New Zealand (May 16-19, 2005). [Carlton, Victoria, Australia]: APPITA, c2005.
Author(s) Agarwal, Umesh P.
Year: 2005   view abstract, download publication »
Title: Raman imaging of lignin and cellulose distribution in black spruce wood (Picea mariana) cell walls
Source: Proceedings of the 59th APPITA Annual Conference and Exhibition incorporating the 13th ISWFPC (International Symposium on Wood, Fibre, and Pulping Chemistry), held in Auckland, New Zealand (May 16-19, 2005). [Carlton, Victoria, Australia]: APPITA, c2005.
Author(s) Agarwal, Umesh P.
Year: 2005   view abstract, download publication »
Title: Raman spectra of lignin model compounds
Source: Proceedings of the 59th APPITA Annual Conference and Exhibition incorporating the 13th ISWFPC (International Symposium on Wood, Fibre, and Pulping Chemistry), held in Auckland, New Zealand (May 16-19, 2005). Carlton, Victoria, Australia]: APPITA, c2005. P
Author(s) Agarwal, Umesh P.; Reiner, Richard S.; Pandey, Ashok K.; Ralph, Sally A.; Hirth, Kolby C.; Atalla, Rajai H.
Year: 2005   view abstract, download publication »
Title: Structural changes of residual lignin of softwood and hardwood kraft pulp upon oxidative treatment with polyoxometalates
Source: Proceedings of the 2005 TAPPI Engineering, Pulping & Environmental Conference, 2005 August 28-31, Philadelphia, PA. Norcross, GA : TAPPI Press, 2005: 13 pages.
Author(s) Bujanovic, Biljana; Reiner, Richard S.; Ralph, Sally A.; Agarwal, Umesh P.; Atalla, Rajai H.
Year: 2005   view abstract, download publication »
Publication Year: 2004
 
Title: FT-Raman investigation of bleaching of spruce thermomechanical pulp
Source: Journal of pulp and paper science. Vol. 30, no. 10 (Oct. 2004): Pages 269-274
Author(s) Agarwal, U.P.; Landucci, L.L.
Year: 2004   view abstract, download publication »
Publication Year: 2003
 
Title: Aging of printing and writing paper upon exposure to light. Part 2, Mechanical and chemical properties
Source: 12th ISWPC International Symposium on Wood and Pulping Chemistry : Madison, Wisconsin, June 9-12, 2003, proceedings. Volume III, Poster presentations. [Madison, WI : University of Wisconsin--Madison, Dept. of Forest Ecology and Management, 2003]: Pages 23
Author(s) Hunt, Chris; Yu, Xiaochun; Bond, James; Agarwal, Umesh; Atalla, Raj
Year: 2003   view abstract, download publication »
Title: FT-Raman spectra of cellulose and lignocellulose materials : 'self-absorption' phenomenon and its implications for quantitative work
Source: 12th ISWPC International Symposium on Wood and Pulping Chemistry : Madison, Wisconsin, June 9-12, 2003, proceedings. Volume III, Poster presentations. [Madison, WI : University of Wisconsin--Madison, Dept. of Forest Ecology and Management, 2003]: Pages 12
Author(s) Agarwal, Umesh; Kawai, Nancy
Year: 2003   view abstract, download publication »
Title: FT-Raman spectroscopy for direct measurement of lignin concentrations in kraft pulps
Source: TAPPI JOURNAL JANUARY 2003 ; pp. 22-26
Author(s) Agarwal, Weinstock, Atalla
Year: 2003   view abstract, download publication »
Title: FT-Raman study of dehydrogenation polymer (DHP) lignins
Source: 12th ISWPC International Symposium on Wood and Pulping Chemistry : Madison, Wisconsin, USA, June 9-12, 2003 : proceedings, volume III : poster presentations. Madison, WI : University of Wisconsin-Madison, Dept. of Forest Ecology and Management, 2003: p. 1
Author(s) Agarwal, Umesh P.; Terashima, Noritsugu
Year: 2003   view abstract, download publication »
Title: In situ quantitation of ring-conjugated ethylenic lignin-units in spruce thermomechanical pulps by FT-Raman spectroscopy
Source: 12th ISWPC International Symposium on Wood and Pulping Chemistry : Madison, Wisconsin, June 9-12, 2003, proceedings. Volume III, Poster presentations. [Madison, WI : University of Wisconsin--Madison, Dept. of Forest Ecology and Management, 2003]: Pages 11
Author(s) Agarwal, Umesh; Ralph, Sally A.
Year: 2003   view abstract, download publication »
Title: Raman microprobe analysis of single ramie fiber during mercerization
Source: 12th ISWPC International Symposium on Wood and Pulping Chemistry : Madison, Wisconsin, June 9-12, 2003, proceedings. Volume III, Poster presentations. [Madison, WI : University of Wisconsin--Madison, Dept. of Forest Ecology and Management, 2003]: Pages 26
Author(s) Isogai, Akira; Agarwal, Umesh P.; Atalla, Rajai H.
Year: 2003   view abstract, download publication »
Publication Year: 2000
 
Title: Ranking mechanical pulps for their potential to photoyellow
Source: Sixth European Workshop on Lignocellulosics and Pulp : Sept. 3-6, 2000, Bordeaux, France. Bordeaux, France : Bordeaux Universite, 2000: Pages 95-98
Author(s) Agarwal, Umesh P.
Year: 2000   view abstract, download publication »
Publication Year: 1999
 
Title: An FT-raman study of softwood, hardwood, and chemically modified black spruce MWLS
Source: [10th International Symposium on Wood and Pulping Chemistry, Main Symposium, 1999 June 07-10, Yokohama, Japan]. Atlanta, GA : TAPPI Press, 1999.:p. 136-140 : ill.
Author(s) Agarwal, Umesh P.; McSweeny, James D.; Ralph, Sally A.
Year: 1999   view abstract, download publication »
Title: On the importance of hydroquinone/p-quinone redox system in the photoyellowing of mechanical pulps
Source: [10th International Symposium on Wood and Pulping Chemistry, Main Symposium, 1999 June 07-10, Yokohama, Japan]. Atlanta, GA : TAPPI Press, 1999.:p. 694-697 : ill.
Author(s) Agarwal, Umesh P.
Year: 1999   view abstract, download publication »
Title: The Aging of lignin rich papers upon exposure to light : its quantification and prediction
Source: [10th International Symposium on Wood and Pulping Chemistry, Main Symposium, 1999 June 07-10, Yokohama, Japan]. Atlanta, GA : TAPPI Press, 1999.:p. 500-504 : ill.
Author(s) Bond, James S.; Atalla, Rajai H.; Agarwal Umesh P.; Hunt, Chris G.
Year: 1999   view abstract, download publication »
Publication Year: 1998
 
Title: Assignment of the Photoyellowing-Related 1675 cm-1 Reman/IR Band to p-Quinones and its implications to the Mechanism of Color Reversion ...
Source: J WOOD CHEMISTRY AND TECHNOLOGY, 18(4), 381-402 (1998)
Author(s) Agarwal, Umesh P.
Year: 1998   view abstract, download publication »
Publication Year: 1997
 
Title: Assignment of the Photoyellowing Related 1675 cm-1 Raman/ IR Band and its Implication to the Mechanism of Color Reversion in Mechanical Pulps
Source: 9th International Symposium on Wood and Pulping Chemistry, 1997 Oral Presentations , pp.1-4
Author(s) Agarwal, Umesh P.
Year: 1997   view abstract, download publication »
Title: FT RAMAN SPECTROSCOPIC STUDY OF SOFTWOOD LIGNIN
Source: 1997 ISWPC, pp. 8-1--8-4
Author(s) Agarwal, Umesh P.; Ralph, Sally A.; Atalla, Rajai H.
Year: 1997   view abstract, download publication »
Title: FT-Raman Spectroscopy of Wood: Identifying contributions of Lignin and Carbohydrate Polymers in the Spectrum of Black Spruce (Picea mariana)
Source: Applied Spectroscopy, Vol 51, Number 11, 1997; pp. 1648-1655
Author(s) Agarwal, Umesh P.; Ralph, Sally A.
Year: 1997   view abstract, download publication »
Title: Photoyellowing of thermomechanical pulps: looking beyond a-carbonyl and ethylenic groups as the initiating structures
Source: JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 17(l&2), 1-26 (1997)
Author(s) Agarwal, Umesh P.; McSweeny, James D.
Year: 1997   view abstract, download publication »
Publication Year: 1996
 
Title: Heterogeneity of lignin concentation in cell corner middle lamellae appeared in Wood Science and Technology 30 (1996) 99-104
Source: Wood Science and Technology 30 (1996) 505-506
Author(s) Tirumalai, V.C.; Agarwal, U.P.; Obst, J.R.
Year: 1996   view abstract, download publication »
Title: Heterogeneity of lignin concentration in cell corner middle lamella of white birch and black spruce
Source: Wood Science and Technology, 30 (1996) 99-104; Springer-Verlag 1996
Author(s) Tirumalai, V.C.; Agarwal, U.P.; Obst, J.R.
Year: 1996   view abstract, download publication »
Publication Year: 1995
 
Title: FT RAMAN SPECTROSCOPY: WHAT IT IS AND WHAT IT CAN DO FOR RESEARCH ON LIGNOCELLULOSIC MATERIALS
Source: 8th Intl Symposium on Wood and Pulping Chemistry, June 6-9, 1995
Author(s) Agarwal, Umesh P.; Attalla, Rajai H.
Year: 1995   view abstract, download publication »
Title: Raman Spectroscopy
Source: Surface Analysis of Paper. Boca Raton, FL
Author(s) Agarwal, Umesh P.; Atalla, Rajai H.
Year: 1995   view abstract, download publication »
Title: Sequential Treatment of Mechanical and Chemimechanical Pulps with Light and Heat: A Raman Spectroscopic Study
Source: Holzforshung, 49 (1995); 300-312
Author(s) Agarwal, Umesh P.; Atalla, Rajai H.; Forsskahl, Ingegerd
Year: 1995   view abstract, download publication »
Publication Year: 1994
 
Title: An FT Raman Study of Residual Lignin In Kraft Pulps
Source: In: Yu, N.-T.; X-Y., eds. ICORS Hong Kong '94: Proceedings of 14th International conference on Raman spectroscopy; 1994 August 22-26; Hong Kong. New York: John Wiley Sons; 1994: 888-889
Author(s) Agarwal, U.P.; Weinstock, I.W.; Atalla, R.H.
Year: 1994   view abstract, download publication »
Title: Raman Spectral Features Associated With Chromophores In High-Yeild Pulps
Source: Journal of wood Chemistry and Technology, 14,(2),227-241 (1994)
Author(s) Agarwal, U.P.; Atalla, Rajai H.
Year: 1994   view abstract, download publication »
Publication Year: 1993
 
Title: Chapter 2 : Raman Spectroscopic Evidence for Coniferyl Alcohol Structures in Bleached and Sulfonated Mechanical Pulps
Source: Proceedings of 203rd national meeting of the American Chemical Society; 1992 April 5-10; San Francisco. Washington, DC: American Chemical Society; 1993: 26-44
Author(s) Agarwal, Umsesh P.; Atalla, Rajai H.
Year: 1993   view abstract, download publication »
Title: Fourier transform Raman spectroscopic studies of a novel wood pulp bleaching system
Source: Spectrochimica Acta, Volume 49A, Number 5/6, pp. 819-829, 1993
Author(s) Weinstock, Ira A.; Atalla, Rajai H.; Agarwal, Umesh P.; Minor, James L.; Petty, Chris
Year: 1993   view abstract, download publication »
Title: FT Raman and UV visible spectroscopic studies of a highly selective polyoxometalate bleaching system
Source: In: Proceedings of 1993 Pulping conference; 1993 November 1-3; Atlanta, GA. TAPPI Press; 1993: 519-532. Book 2.
Author(s) Weinstock, Ira A.; Minor, James L.; Reiner, Richard S.; Agarwal, Umesh P.; Atalla, Rajai H.
Year: 1993   view abstract, download publication »
Publication Year: 1992
 
Title: 4.6 Raman Spectroscopy
Source: Methods in lignin chemistry. New York: Springer-Verlag : 162-176; 1992
Author(s) Atalla, R.H.; Agarwal, U.P.; Bond, J.S.
Year: 1992   view abstract, download publication »
Publication Year: 1986
 
Title: In-situ Raman microprobe studies of plant cell walls: macromolecular organization and compositional variability in the secondary wall of Picea mariana (Mill.) B.S.P.
Source: Planta. Vol. 169 (1986): Pages 325-332.
Author(s) Agarwal, U.P.; Atalla, R.H.
Year: 1986   view abstract, download publication »
 
Publication Year: 2016
Cross-section of wood cell wall. U.S. Department of Agriculture Forest Service.
Highlight ID: 659
Heat Treatment of Green Wood Accomplishes Crystal Hardening

After centuries of study, the structure of the woody cell wall remains poorly understood. Regarding cellulose crystals in green wood, X-ray methods demonstrate the repeating structure of a crystal, but Raman Spectroscopy methods reveal a high level o ...

 
Publication Year: 2015
New model of wood cellulose in never-dried and dried states. Umesh Agarwal, USDA Forest Service.
Highlight ID: 619
Using Raman Spectroscopy to Analyze Wood, Cellulose-Nanomaterials, and Their Composites

Raman spectroscopy provides information based on molecular vibrations and is well-suited to analyze wood and cellulose-nanomaterials. Using a recently developed method to determine the fraction of cellulose that is in a crystalline region, this resea ...

Research Projects serving in the role of Principal Investigator
 
Project NameStart DateEnd Date
 
Wood Fiber and Chemical Products

Total affiliated publications: 31
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