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1. Improved biobleaching of mixed hardwood pulp and process optimization using novel GA-ANN and GA-ANFIS hybrid statistical tools

Author:
Kumar, Vishal; Kumar, Ashwani; Chhabra, Deepak; Shukla, Pratyoosh
Source:
Bioresource technology 2019 v.271 pp. 274-282
ISSN:
0960-8524
Subject:
hardwood,   etc   ; biobleaching; lignin; pulp; reducing sugars; xylanases;     Show all 6 Subjects
Abstract:
... The process parameters for xylanase biobleaching of mixed hardwood pulp like, reaction time (6–35 h), pulp consistency (2.5–15%) and xylanase dose (5–35 U) were optimized using OFAT approach and hybrid statistical tools viz. GA-ANN and GA-ANFIS. The biobleaching ability of xylanase in terms of reducing sugar yield increased up to 28.16 mg g−1 (28.05%) than OFAT optimization (21.99 mg g−1 of pulp) ...
DOI:
10.1016/j.biortech.2018.09.115

2. A facile method to concentrate cellulose nanofibril slurries

Author:
Sheng, Jie; Yang, Rendang
Source:
Cellulose 2019 v.26 no.2 pp. 679-682
ISSN:
0969-0239
Subject:
hardwood,   etc   ; bamboos; cellulose; freezing; melting; nanofibers; pulp; slurries;     Show all 8 Subjects
Abstract:
... A highly efficient approach to concentrate nanocellulose suspensions is urgently required for the application of nanocellulose at a large scale. In this paper, a facile method, freeze concentration, was used to concentrate a nanocellulose slurry. This method only includes two processes, first freezing of the slurry followed by melting. Most of the water in the slurries could be easily removed, and ...
DOI:
10.1007/s10570-018-2099-2

3. A regional scale assessment of habitat selection and home range of the eastern rat snake in pine-dominated forests

Author:
Howze, Jennifer M.; Sash, Kimberly J.; Carroll, John P.; Smith, Lora L.
Source:
Forest ecology and management 2019 v.432 pp. 225-230
ISSN:
0378-1127
Subject:
hardwood; hardwood forests,   etc   ; Pantherophis; Pinus palustris; Quercus; geographical distribution; habitats; home range; intraspecific variation; landscapes; snakes; trees; Florida; Georgia;     Show all 14 Subjects
Abstract:
... An animal’s spatial ecology may provide insight into how resources are distributed or potentially limiting across its home range. Some species with broad geographic distributions may exhibit intraspecific variation in space use among populations given the spectrum of available habitat across their range. Animals may need to move further in habitats with limited resources thereby lowering survival. ...
DOI:
10.1016/j.foreco.2018.09.018

4. Elastic characterization of wood by Resonant Ultrasound Spectroscopy (RUS): a comprehensive study

Author:
Longo, R.; Laux, D.; Pagano, S.; Delaunay, T.; Le Clézio, E.; Arnould, O.
Source:
Wood science and technology 2018 v.52 no.2 pp. 383-402
ISSN:
0043-7719
Subject:
hardwood,   etc   ; softwood; spectroscopy; vibration; viscoelasticity;     Show all 5 Subjects
Abstract:
... The main principle of Resonant Ultrasound Spectroscopy (RUS) measurement method is to excite a sample and to deduce its elastic constants from its free mechanical resonant frequencies. The goal of this paper is to propose an application of RUS in the case of wood cubic samples by: (1) using frequencies and mode shapes (or vibration patterns) of the free resonant modes in an iterative numerical pro ...
DOI:
10.1007/s00226-017-0980-z

5. Characterization of the chloroplast genome of Erythrophleum fordii (Fabaceae)

Author:
Huang, Songyi; Wu, Wei; Chen, Zheng; Zhu, Qiaoming; Ng, Wei Lun; Zhou, Qiujie
Source:
Conservation genetics resources 2019 v.11 no.2 pp. 165-167
ISSN:
1877-7252
Subject:
hardwood,   etc   ; Erythrophleum fordii; chloroplast genome; genes; nucleotide sequences; phylogeny; ribosomal RNA; transfer RNA; trees; China; Vietnam;     Show all 11 Subjects
Abstract:
... A popular hardwood tree and a Chinese traditional medicine, Erythrophleum fordii has been heavily exploited. It is listed in the Plant Red Data Books of China and Vietnam, and is considered as ‘Endangered’ in the IUCN Red List. Here we report the complete chloroplast genome sequence of E. fordii assembled from Illumina sequencing data. The complete chloroplast genome sequence of E. fordii was 160, ...
DOI:
10.1007/s12686-018-0990-7

6. A four-point electrical resistivity method for detecting wood decay and hollows in living trees

Author:
Soge, Ayodele O.; Popoola, Olatunde I.; Adetoyinbo, Adedeji A.
Source:
European journal of wood and wood products 2019 v.77 no.3 pp. 465-474
ISSN:
0018-3768
Subject:
hardwood,   etc   ; Acacia; Senna alata; decayed wood; electrical resistance; forests; laboratory experimentation; prototypes; risk assessment; trees;     Show all 10 Subjects
Abstract:
... An accurate method of detecting wood decay and hollows or cavities in living trees is useful for risk assessment and maintenance of both forest and urban trees. This study presents the implementation of the four-point electrical resistivity method for the early detection of the presence, location and extent of wood decay and hollows in living acacia trees (Senna alata L.). Electrical resistivity m ...
DOI:
10.1007/s00107-019-01402-1

7. Lignin–Enzyme Interactions in the Hydrolysis of Lignocellulosic Biomass

Author:
dos Santos, Antonio Carlos; Ximenes, Eduardo; Kim, Youngmi; Ladisch, Michael R.
Source:
Trends in biotechnology 2019 v.37 no.5 pp. 518-531
ISSN:
0167-7799
Subject:
hardwood,   etc   ; biomass; cell walls; cellulose; enzymatic hydrolysis; enzymes; hydrolysis; lignin; lignocellulose;     Show all 9 Subjects
Abstract:
... Lignin is central to overcoming recalcitrance in the enzyme hydrolysis of lignocellulose. While the term implies a physical barrier in the cell wall structure, there are also important biochemical components that direct interactions between lignin and the hydrolytic enzymes that attack cellulose in plant cell walls. Progress toward a deeper understanding of the lignin synthesis pathway – and the c ...
DOI:
10.1016/j.tibtech.2018.10.010

8. The influence of veneer thickness and knot proportion on the mechanical properties of laminated veneer lumber (LVL) made from secondary quality hardwood

Author:
Purba, Citra Yanto Ciki; Pot, Guillaume; Viguier, Joffrey; Ruelle, Julien; Denaud, Louis
Source:
European journal of wood and wood products 2019 v.77 no.3 pp. 393-404
ISSN:
0018-3768
Subject:
hardwood,   etc   ; Fagus; laminated veneer lumber; modulus of elasticity; modulus of rupture; nondestructive methods; polyvinyl acetate;     Show all 7 Subjects
Abstract:
... The first objective of this work was to study the influence of veneer quality on the mechanical properties of laminated veneer lumber (LVL) made of secondary quality hardwood. The second objective was to propose an adapted veneer thickness that provides the optimum mechanical properties of LVL, taking the veneer properties into account. Forty-eight LVL panels glued together using polyvinyl acetate ...
DOI:
10.1007/s00107-019-01400-3

9. Characterization of solvent-fractionated lignins from woody biomass treated via supercritical water oxidation

Author:
Ho Seo, Jin; Jeong, Hanseob; Lee, Hyung Won; Choi, Cheol Soon; Bae, Jin Ho; Lee, Soo Min; Kim, Yong Sik
Source:
Bioresource technology 2019 v.275 pp. 368-374
ISSN:
0960-8524
Subject:
hardwood,   etc   ; Quercus mongolica; biomass; fractionation; glass transition temperature; lignin; moieties; molecular weight; oxidation; solvents; thermal stability;     Show all 11 Subjects
Abstract:
... Crude supercritical lignin (SCL) extracted from hardwood (Quercus mongolica) treated via supercritical water (SCW) oxidation was subjected to sequential fractionation with four organic solvents; five lignin fractions (F1−F4 and FIN) were thus obtained. The molecular weight (MW) of the fractionated lignins gradually increased as fractionation proceeded. However, the content of methoxyl groups and p ...
DOI:
10.1016/j.biortech.2018.12.076

10. Potential of microwave scanning for determining density and tension strength of four European hardwood species

Author:
Weidenhiller, Andreas; Linsenmann, Peter; Lux, Christian; Brüchert, Franka
Source:
European journal of wood and wood products 2019 v.77 no.2 pp. 235-247
ISSN:
0018-3768
Subject:
hardwood,   etc   ; Castanea; Fagus; energy; forests; furniture; markets; microwave radiation; softwood; tensile strength;     Show all 10 Subjects
Abstract:
... As an effect of changing forest management—away from softwood monocultures to more robust mixed stands—the availability of hardwood on the European timber market increases. Thus, a more diversified spectrum of hardwood products is required between the established uses in furniture and energy production. Glued timber products are a promising option in this respect. One important prerequisite for ef ...
DOI:
10.1007/s00107-019-01387-x

11. Disentangling variables that influence growth response of balsam fir regeneration during a spruce budworm outbreak

Author:
Nie, Zhuoyi; MacLean, David A.; Taylor, Anthony R.
Source:
Forest ecology and management 2019 v.433 pp. 13-23
ISSN:
0378-1127
Subject:
hardwood,   etc   ; Abies balsamea; Choristoneura fumiferana; canopy; climate; defoliation; ground vegetation; models; softwood; vegetation cover;     Show all 10 Subjects
Abstract:
... Height increment of balsam fir (Abies balsamea (L.) Mill.) regeneration during a spruce budworm (Choristoneura fumiferana Clem.) outbreak can be affected by a variety of variables including defoliation, ground vegetation competition, canopy openness, the height of regeneration, and stand type. To disentangle how these variables interact to determine regeneration height increment, we sampled 36 plo ...
DOI:
10.1016/j.foreco.2018.10.050

12. Ordered mesoporous carbons from lignin: a new class of biobased electrodes for supercapacitors

Author:
Herou, Servann; Ribadeneyra, Maria Crespo; Madhu, Rajesh; Araullo-Peters, Vicente; Jensen, Anders; Schlee, Philipp; Titirici, Magdalena
Source:
Green chemistry 2019 v.21 no.3 pp. 550-559
ISSN:
1463-9270
Subject:
hardwood,   etc   ; carbon; electrochemistry; electrodes; energy; evaporation; formaldehyde; green chemistry; lignin; porous media; toxicity;     Show all 11 Subjects
Abstract:
... We report the synthesis of sustainable ordered mesoporous carbons (OMCs) produced from lignin, using the evaporation induced self-assembly (EISA) method. We demonstrated that it is possible to replace half of the phloroglucinol (a well-known carbon precursor currently not derived from bioprecursors) by hardwood organosolv lignin while obtaining a highly ordered pore structure. Notably, we also use ...
DOI:
10.1039/c8gc03497d

13. Chemical characteristics and stability of eucalyptus kraft pulps bleached with tertiary amine catalyzed hypochlorous acid

Author:
Afsahi, Ghazaleh; Rojalin, Tatu; Vuorinen, Tapani
Source:
Cellulose 2019 v.26 no.3 pp. 2047-2054
ISSN:
0969-0239
Subject:
hardwood,   etc   ; Eucalyptus; cellulose; chlorine; discoloration; hydrogen peroxide; kraft pulp; moieties; ozone; physicochemical properties; polymerization;     Show all 11 Subjects
Abstract:
... We recently found that subsequent treatments of hardwood kraft pulps with a tertiary amine (DABCO; 1,4-diazabicyclo[2.2.2]octane) catalyzed hypochlorous acid (Hcₐₜ), ozone (Z) and hydrogen peroxide (P) may provide full brightness with low chemical dosages in a short overall reaction time. Here we report chemical characteristics and stability of Hcₐₜ–Z–P bleached eucalyptus kraft pulps. In comparis ...
DOI:
10.1007/s10570-018-2172-x

14. Developing trapping protocols for wood-boring beetles associated with broadleaf trees

Author:
Rassati, Davide; Marini, Lorenzo; Marchioro, Matteo; Rapuzzi, Pierpaolo; Magnani, Gianluca; Poloni, Riccardo; Di Giovanni, Filippo; Mayo, Peter; Sweeney, Jon
Source:
Journal of pest science 2019 v.92 no.1 pp. 267-279
ISSN:
1612-4758
Subject:
hardwood,   etc   ; Buprestidae; bait traps; broadleaved trees; canopy; color; ethanol; forests; species richness; trapping; understory; Italy;     Show all 12 Subjects
Abstract:
... Longhorn and jewel beetles are often moved intercontinentally within woody materials. The common use of hardwoods in solid wood-packaging requires efficient trapping protocols for broadleaf-associated species. We tested the effect of lure (ethanol vs multi-lure), trap color (green vs purple), and trap height (understory vs canopy) on the longhorn and jewel beetle species trapped in multi-funnel tr ...
DOI:
10.1007/s10340-018-0984-y

15. A novel acetyl xylan esterase enabling complete deacetylation of substituted xylans

Author:
Razeq, Fakhria M.; Jurak, Edita; Stogios, Peter J.; Yan, Ruoyu; Tenkanen, Maija; Kabel, Mirjam A.; Wang, Weijun; Master, Emma R.
Source:
Biotechnology for biofuels 2018 v.11 no.1 pp. 74
ISSN:
1754-6834
Subject:
hardwood,   etc   ; enzyme activity; esterases; loci; moieties; xylan;     Show all 6 Subjects
Abstract:
... BACKGROUND: Acetylated 4-O-(methyl)glucuronoxylan (GX) is the main hemicellulose in deciduous hardwood, and comprises a β-(1→4)-linked xylopyranosyl (Xylp) backbone substituted by both acetyl groups and α-(1→2)-linked 4-O-methylglucopyranosyluronic acid (MeGlcpA). Whereas enzymes that target singly acetylated Xylp or doubly 2,3-O-acetyl-Xylp have been well characterized, those targeting (2-O-MeGlc ...
DOI:
10.1186/s13068-018-1074-3
PubMed:
29588659
PubMed Central:
PMC5863359

16. Comparison of two dye uptake measurement methods for dyed wood veneer assessment

Author:
Nguyen, Ngoc; Ozarska, Barbara; Fergusson, Macarthur; Vinden, Peter
Source:
European journal of wood and wood products 2018 v.76 no.6 pp. 1757-1759
ISSN:
0018-3768
Subject:
hardwood,   etc   ; color; dyes; liquids; spectroscopy; wood veneer;     Show all 6 Subjects
Abstract:
... Dyeing of veneer is an important value-adding process, particularly for young plantation hardwood species, which often have uneven colour and “dull appearance”. An important indicator in the assessment of the performance of veneer dyeing process is the dye uptake. This study compared two different methods of measuring dye uptake of dyed veneers; by using either liquid uptake based method or spectr ...
DOI:
10.1007/s00107-018-1344-6

17. Selective Depolymerization of Lignin: Assessment of Yields of Monomeric Products

Author:
Evstigneyev, Edward I.
Source:
Journal of wood chemistry and technology 2018 v.38 no.5 pp. 409-415
ISSN:
1532-2319
Subject:
hardwood,   etc   ; depolymerization; pulping; softwood; value-added products;     Show all 5 Subjects
Abstract:
... A method is developed to assess the limits of selective depolymerization, that is, splitting of aryl ether bonds to yield monomeric aromatic products, of native and technical lignins. The method and respective formula is based on measuring the difference between a sum of aryl ether bonds (α-О-4 and β-О-4) and sum of 5-5 and 4-O-5 bonds. The values calculated based on the proposed formula are corre ...
DOI:
10.1080/02773813.2018.1500607

18. Comparison of three systems for automatic grain angle determination on European hardwood for construction use

Author:
Schlotzhauer, Philipp; Wilhelms, Fritz; Lux, Christian; Bollmus, Susanne
Source:
European journal of wood and wood products 2018 v.76 no.3 pp. 911-923
ISSN:
0018-3768
Subject:
hardwood,   etc   ; Picea; electric field; softwood; tracheids;     Show all 5 Subjects
Abstract:
... This paper aims to sketch the research results on machine grain angle determination on six indigenous hardwoods and spruce as reference. The system widely used for softwood grain angle determination (tracheid effect) is only restrictedly suitable for hardwoods. Therefore, the systems microwave scanning and electrical field strength measurement were tested as well as the above-mentioned tracheid ef ...
DOI:
10.1007/s00107-018-1286-z

19. Correction to: Comparative characteristics of TEMPO-oxidized cellulose nanofibers and resulting nanopapers from bamboo, softwood, and hardwood pulps

Author:
Chen, Yufei; Geng, Biyao; Ru, Jing; Tong, Congcong; Liu, Hongzhi; Chen, Jinzhou
Source:
Cellulose 2018 v.25 no.1 pp. 895
ISSN:
0969-0239
Subject:
hardwood,   etc   ; bamboos; cellulose; cellulose microfibrils; softwood; China;     Show all 6 Subjects
Abstract:
... The affiliation “Collaborative Innovation Center of Bamboo Resources & Highly Efficient Utilization in Zhejiang Province” in the published article should be corrected to read “Zhejiang Provincial Collaborative Innovation Center of Bamboo Resources and High-Efficiency Utilization”. ...
DOI:
10.1007/s10570-017-1553-x

20. Determination of mode I and mode II fracture toughness of walnut and cherry in TR and RT crack propagation system by the Arcan test

Author:
Murata, Koji; Bachtiar, Erik Valentine; Niemz, Peter
Source:
Holzforschung 2017 v.71 no.12 pp. 985-990
ISSN:
1437-434X
Subject:
hardwood,   etc   ; cherries; energy; walnuts;     Show all 4 Subjects
Abstract:
... Two specimen types, each from walnut and cherry wood, were prepared for tangential-radial (TR) and radial-tangential (RT) crack propagation systems at 65% of RH and 20°C before mode I and mode II fracture toughness was determined through Arcan tests. It was found that fracture toughness in mode I is in agreement with literature data. In the mode II test, however, the crack propagated in the direct ...
DOI:
10.1515/hf-2017-0063