The value of forest biotechnology: a cost modelling study with loblolly pine and kraft linerboard in the southeastern USA

2007 ◽  
Vol 9 (5) ◽  
pp. 415 ◽  
Author(s):  
Gary F. Peter ◽  
David E. White ◽  
Rafael De La Torre ◽  
Rajan Singh ◽  
David Newman
Keyword(s):  
Loblolly Pine ◽  
Forest Biotechnology ◽  
Southeastern Usa ◽  
Cost Modelling ◽  
Modelling Study

Bioenergy production effects on SOM with depth of loblolly pine forests on Paleaquults in southeastern USA

2021 ◽  
pp. e00428
Author(s):  
Kevan J. Minick ◽  
Zakiya H. Leggett ◽  
Eric B. Sucre ◽  
Thomas R. Fox ◽  
Brian D. Strahm
Keyword(s):  
Loblolly Pine ◽  
Pine Forests ◽  
Southeastern Usa ◽  
Bioenergy Production ◽  
Production Effects

scholarly journals Snag characteristics and dynamics following natural and artificially induced mortality in a managed loblolly pine forest

2013 ◽  
Vol 43 (9) ◽  
pp. 817-825 ◽  
Author(s):  
Stanley J. Zarnoch ◽  
Mark A. Vukovich ◽  
John C. Kilgo ◽  
John I. Blake
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
High Mortality ◽  
Pine Forest ◽  
Canopy Density ◽  
Southeastern Usa ◽  
Wildlife Species ◽  
The Mean ◽  
Pine Stands ◽  
Pinus Taeda L

A 14-year study of snag characteristics was established in 41- to 44-year-old loblolly pine (Pinus taeda L.) stands in southeastern USA. During the initial 5.5 years, no stand manipulation or unusually high-mortality events occurred. Afterwards, three treatments were applied consisting of trees thinned and removed, trees felled and not removed, and artificial creation of snags produced by girdling and herbicide injection. The thinned treatments were designed to maintain the same live canopy density as the snag-created treatment, disregarding snags that remained standing. We monitored snag height, diameter, density, volume, and bark percentage; the number of cavities was monitored in natural snags only. During the first 5.5 years, recruitment and loss rates were stable, resulting in a stable snag population. Large snags (≥25 cm diameter) were common, but subcanopy small snags (10 to <25 cm diameter) dominated numerically. Large natural snags survived (90% quantile) significantly longer (6.0–9.4 years) than smaller snags (4.4–6.9 years). Large artificial snags persisted the longest (11.8 years). Cavities in natural snags developed within 3 years following tree death. The mean number of cavities per snag was five times greater in large versus small snags and large snags were more likely to have multiple cavities, emphasizing the importance of mature pine stands for cavity-dependent wildlife species.

Polysulfide-borohydride modification of southern pine alkaline pulping integrated with hydrothermal pre-extraction of hemicelluloses

TAPPI Journal ◽  
2011 ◽  
Vol 10 (7) ◽  
pp. 9-16
Author(s):  
SUNG-HOON YOON ◽  
HARRY CULLINAN ◽  
GOPAL A. KRISHNAGOPALAN
Keyword(s):  
Loblolly Pine ◽  
Sodium Borohydride ◽  
Kraft Pulping ◽  
Hot Water ◽  
Pulp Yield ◽  
Paper Strength ◽  
Southern Pine ◽  
Two Stage ◽  
Simultaneous Treatment ◽  
Process Modification

We studied three process modifications to investigate their effects on the property and yield recovery capabilities of kraft pulping integrated with hemicellulose pre-extraction of southern pine. Loblolly pine chips were pre-extracted with hot water until the sugar extraction yield reached the targeted value of 10% and then subjected to conventional and modified kraft pulping. Modification included polysulfide pretreatment; polysulfide-sodium borohydride dual pretreatment, and polysulfide followed by polysulfide-sodium borohydride dual pretreatment two-stage pretreatments prior to kraft pulping. In the first modification, about 5% of the lost pulp yield (total 7%) caused by hemicellulose pre-extraction could be recovered with 15%-20% polysulfide pretreatment. Complete recovery (7%) was achieved with simultaneous pretreatment using 15% polysulfide and 0.5% sodium borohydride with 0.1% anthraquinone in polysulfide-sodium borohydride dual pretreatment. Two-stage pretreatment using recycled 15% polysulfide followed by simultaneous treatment of 6% polysulfide and 0.4%–0.5% sodium borohydride with 0.1% anthraquinone also achieved 100% yield recovery. Continuous recycling of 15% polysulfide employed in the two-stage process modification maintained its yield protection efficiency in a repeated recycling cycle. No significant changes in paper strength were found in handsheets prepared from the three process modifications, except for a minor reduction in tear strength.

Urbanization impacts on production and recruitment of Fundulus heteroclitus in salt marsh creeks

2020 ◽  
Vol 645 ◽  
pp. 187-204
Author(s):  
PJ Rudershausen ◽  
JA Buckel
Keyword(s):  
Salt Marsh ◽  
Salt Marshes ◽  
Fundulus Heteroclitus ◽  
Multiple Factor Analysis ◽  
Southeastern Usa ◽  
Density Dependent ◽  
Dependent Relationship ◽  
Juvenile Abundance ◽  
The Relationship ◽  
Throw Trap

It is unclear how urbanization affects secondary biological production in estuaries in the southeastern USA. We estimated production of larval/juvenile Fundulus heteroclitus in salt marsh areas of North Carolina tidal creeks and tested for factors influencing production. F. heteroclitus were collected with a throw trap in salt marshes of 5 creeks subjected to a range of urbanization intensities. Multiple factor analysis (MFA) was used to reduce dimensionality of habitat and urbanization effects in the creeks and their watersheds. Production was then related to the first 2 dimensions of the MFA, month, and year. Lastly, we determined the relationship between creek-wide larval/juvenile production and abundance from spring and abundance of adults from autumn of the same year. Production in marsh (g m-2 d-1) varied between years and was negatively related to the MFA dimension that indexed salt marsh; higher rates of production were related to creeks with higher percentages of marsh. An asymptotic relationship was found between abundance of adults and creek-wide production of larvae/juveniles and an even stronger density-dependent relationship was found between abundance of adults and creek-wide larval/juvenile abundance. Results demonstrate (1) the ability of F. heteroclitus to maintain production within salt marsh in creeks with a lesser percentage of marsh as long as this habitat is not removed altogether and (2) a density-dependent link between age-0 production/abundance and subsequent adult recruitment. Given the relationship between production and marsh area, natural resource agencies should consider impacts of development on production when permitting construction in the southeastern USA.

MODELLING STUDY OF INTERSTELLAR ETHANIMINE ISOMERS

2016 ◽  
Author(s):  
Donghui Quan ◽  
George Hassel ◽  
Allison Durr ◽  
Joanna Corby ◽  
Eric Herbst
Keyword(s):  
Modelling Study

Characterization and Modelling Study of a Triple Porosity Fractured Reservoir

2007 ◽  
Author(s):  
Francois Michel Gouth ◽  
Sabah K. Aziz ◽  
Frederic Jeanjean ◽  
Christophe Soyeur ◽  
Laure Moen-Maurel
Keyword(s):  
Fractured Reservoir ◽  
Modelling Study
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