Výsledky vyhledávání - "Raymond C. Francis"

Akademický článek

KRAFT PULPING CHARACTERISTICS OF THREE MOROCCAN EUCALYPTI. PART 1. PHYSICAL AND CHEMICAL PROPERTIES OF WOODS AND PULPS

Autor: Mohammed El Moussaouiti,, Badr. Barcha,, Ericka F. Alves,, Raymond C. Francis

Publikováno v: BioResources, Vol 7, Iss 2, Pp 1558-1568 (2012)

Two eucalyptus hybrids (EGC 39, EGC 241), resulting from crosses between Eucalyptus grandis and Eucalyptus camaldulensis, were investigated to see if they could produce kraft papermaking fibers with low lignin and adequate physical properties. The tw

Externí odkaz: https://doaj.org/article/72ae19b3084246eebeff31f8478c1748

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Akademický článek

KRAFT PULPING CHARACTERISTICS OF THREE MOROCCAN EUCALYPTI. PART 2. COMPARISON OF THE GUAIACYL FRACTION OF THE NATIVE LIGNINS BY A NOVEL METHOD

Autor: Ericka F. Alves,, Raymond C. Francis,, Badr. Barcha,, Mohammed El Moussaouiti

Publikováno v: BioResources, Vol 7, Iss 2, Pp 1569-1581 (2012)

In Part 1 of this series it was observed that one of the eucalypti (EGC 39) was more reactive than the other two in kraft and soda-AQ (SAQ) cooking. However, the lignin in EGC 39 contained equal or less syringyl (S) units than the other two eucalypti

Externí odkaz: https://doaj.org/article/132f1f4a914f43ba9b0df0650cdf1f31

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Akademický článek

AN OXIDANT TO REPLACE NITROBENZENE IN LIGNIN ANALYSIS

Autor: Michael P. Masingale, Ericka F. Alves, Theresah N. Korbieh, Samar K. Bose, Raymond C. Francis

Publikováno v: BioResources, Vol 4, Iss 3, Pp 1139-1146 (2009)

Four metal organic frameworks (MOFs) are being evaluated as possible catalysts for alkaline lignin oxidation. One aspect of the screening process is the oxidation of in-situ hardwood lignin by a high mole ratio of Cu, Fe, or Cu + Fe contained in the

Externí odkaz: https://doaj.org/article/01e019a5031143ecaa9bcae22eacafe6

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Akademický článek

Estimation of hardwood lignin concentrations by UV spectroscopy and chlorine demethylation

Autor: Raymond C. Francis, Shigetoshi Omori, Todd S. Bolton, Ramesh Singh, Prasanna Parasuraman

Publikováno v: BioResources, Vol 2, Iss 3, Pp 459-471 (2007)

Major projects are underway in our laboratory focusing on mildly acidic (pH>3) and alkaline (pH

Externí odkaz: https://doaj.org/article/89b029d49c924ac0b92ad522b0002738

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Mechanistic Differences Between Kraft and Soda-AQ Pulping of Hardwoods with Regard to Lignin–Carbohydrate Complexes (LCC)

Autor: D. J. Nicholson, Raymond C. Francis, A. T. Leavitt, B. Stromberg

Publikováno v: Journal of Wood Chemistry and Technology. 37:307-322

The literature on biomass research contains many references to lignin–carbohydrate complexes (LCC) decreasing the rate of delignification in chemical pulping, decreasing the yield of cellulosic ethanol via fermentation, and decreasing forage digest

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0cc77c2b80b4c510ccc22ce4c677ea6c
https://doi.org/10.1080/02773813.2017.1299184

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Estimation of the S/G ratios of the lignins in three widely used North American hardwoods

Autor: Raymond C. Francis, Samar K. Bose, Candace Guilford, Daniel J. Nicholson, Adebukola Abiola

Publikováno v: July 2016. 15:449-457

Sugar maple (Acer saccharum), aspen (Populus tremuloides), and white birch (Betula papyrifera) are three hardwoods that are widely used by the North American pulp and paper industry. Because of their abundance, these species are also likely to be use

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b445e7484526e7a8542d9ee5490d7ca5
https://doi.org/10.32964/tj15.7.449

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Quantification of lignin-carbohydrate complexes in hardwood pulps, Part 2: Effects of bleaching chemicals

Autor: David J. Kiemle, David J. Nicholson, Aaron T. Leavitt, Gustavo V. Duarte, Raymond C. Francis, Ericka F. Alves

Publikováno v: October 2015. 14:663-670

High kappa number kraft and soda-anthraquinone (soda-AQ or SAQ) pulps from sugar maple (Acer saccharum) were investigated to see how the lignin-carbohydrate complexes (LCC) they contained affected lignin removal by oxygen, chlorine dioxide, and hydro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7ebc7eac26d7dc8d21230fa08c02766
https://doi.org/10.32964/tj14.10.663

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Trapping of p-Coumaryl and Coniferyl Alcohol during Soda–Anthraquinone Treatment: A Means of Estimating Uncondensed β-O-4 Structures in Native Lignin

Autor: Ericka Figueiredo Alves, Mohammed El Moussaouiti, Raymond C. Francis, Samar K. Bose

Publikováno v: Journal of Agricultural and Food Chemistry. 60:9202-9210

In most native lignins, at least 50% of the phenylpropane (C(9)) units are involved in β-O-4 linkages. It was recently observed that ethylguaiacol (EG) was efficient at trapping coniferyl alcohol generated from the cleavage of uncondensed β-O-4 dim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::895b819871e85f651232fcba7b41ce61
https://doi.org/10.1021/jf301977y

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