Zobrazeno 1 - 10
of 41
pro vyhledávání: '"CYRIL HEITNER"'
Publikováno v:
BioResources, Vol 2, Iss 3, Pp 334-350 (2007)
In NaHSO3-solutions of coniferaldehyde and its methyl ether (models for lignin chromophores of the cinnamaldehyde type) a dynamic equilibrium between the aldehydes and their hydrogen sulfite adducts is set up. A comparatively slow addition of hydroge
Externí odkaz:
https://doaj.org/article/d83387794ac34beab00164e8802e3e02
Publikováno v:
Lignin and Lignans: Advances in Chemistry
Overview D. Dimmel Determining Lignin Structure by Chemical Degradations C. Lapierre Electronic Spectroscopy of Lignins J. A. Schmidt Vibrational Spectroscopy U. P. Agarwal and R. H. Atalla NMR of Lignins J. Ralph and L. L. Landucci Heteronuclear NMR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21a822e2fa298289d628abbf3c372003
https://doi.org/10.1201/ebk1574444865
https://doi.org/10.1201/ebk1574444865
Publikováno v:
March 2009. 8:32-40
Although loblolly pine (Pinus taeda) is less costly than northern softwoods, loblolly pine mechanical pulps tend to be of poor quality and are mainly used in low-value grades such as newsprint. We evaluated various mechanical pulping processes for ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d64d59c34e1c1fc950b9761f6a3d6d50
https://doi.org/10.32964/tj8.3.32
https://doi.org/10.32964/tj8.3.32
Autor:
John Schmidt, Peter F. McGarry, Thomas Friend Thompson, Andrew Rodenhiser, R. St. John Manley, Glen T. Cunkle, Cyril Heitner
Publikováno v:
Journal of Photochemistry and Photobiology A: Chemistry. 151:145-155
UV screens used to photostabilise high-yield pulp do not work as well when deposited from water as they do when deposited from organic solvents. For a water-soluble ultraviolet absorber (UVA) based on 2-hydroxybenzophenone, the water-effect is dramat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16e909d01625289ff18894b4fb553ac9
https://doi.org/10.1016/s1010-6030(02)00029-1
https://doi.org/10.1016/s1010-6030(02)00029-1
Autor:
John Schmidt, Cyril Heitner
Publikováno v:
Journal of Wood Chemistry and Technology. 15:223-245
We have compared the light-induced yellowing of three peroxide-bleached mechanical pulps: softwood TMP (spruce/balsam fir mixture), softwood CTMP (spruce), and aspen CTMP. We attribute dissimilarities in the absorption difference spectra of softwood
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b023cd04c4e8b3e7d80b07dc97265f3f
https://doi.org/10.1080/02773819508009509
https://doi.org/10.1080/02773819508009509
Publikováno v:
Research on Chemical Intermediates. 21:263-274
Unbleached and alkaline hydrogen peroxide bleached black spruce (picea mariana) stone groundwood samples were irradiated with a weak light source over a period of six days in an effort to probe the early photochemical events occurring during the ligh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::848fc2e96307c3579b23a5f75770c8b5
https://doi.org/10.1007/bf03052257
https://doi.org/10.1007/bf03052257
Autor:
Lenizart Salnzén, Cyril Heitner
Publikováno v:
Nordic Pulp & Paper Research Journal. 9:182-186
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5f0523d7bbae4b36a4a0188c4c5cb03
https://doi.org/10.3183/npprj-1994-09-03-p182-186
https://doi.org/10.3183/npprj-1994-09-03-p182-186