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Your search keyword '"Freitag, Camille"' showing total 29 results
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29 results on '"Freitag, Camille"'

1. Performance of Internal Remedial Treatments on Douglas-Fir Poles: A Large-Scale Field Trial

Author

Konkler, Matthew J., Cappellazzi, Jed, Love, Connie S., Freitag, Camille, and Morrell, Jeffrey J.

Subjects
Clinical trials, Fumigants, Timber, Borates, Boron compounds, Business, Forest products industry
Abstract

Internal decay is a common problem in poles or timbers of thin sapwood species. Several internal treatments have been developed to arrest this attack, and these systems are widely used in North America. Although these treatments have been evaluated in numerous independent field trials, there is no single test of all treatments. The objective of this study was to assess the chemical distribution and fungal colonization in Douglas-fir poles treated with each of 13 different internal remedial treatments over a 10-year period. Metam sodium treatments provided the shortest protective period, with little evidence of residual chemical 3 years after treatment. Methylisothiocyanate (MITC) in pure form provided a very high initial flush of active ingredient and a longer protective period extending from 5 to 8 years after treatment. Dazomet, which must decompose to produce MITC, took slightly longer to reach effective levels, but was still present at effective levels 10 years after treatment. Chloropicrin, which has strong interactions with wood, was associated with the highest chemical levels after 10 years. Borates took longer to reach effective levels in the poles and their protective zone was narrower than the fumigants, but boron was still present at effective levels 10 years after application. The results illustrate the different properties provided by each treatment, but also show that all tested remedial treatments were effective within certain limitations., Pressure treatment of large timbers and poles of thin sapwood species generally produces a shallow shell of protection surrounding the untreated heartwood core (Graham 1983). The treatment remains protective if [...]

Published
2019
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5. Effect of copper on long-term performance of dazomet as an internal remedial treatment in Douglas-fir poles

Author

Love, Connie S., Freitag, Camille, and Morrell, Jeffrey J.

Subjects
Company business management, Woodworking industry -- Management -- Analysis, Wood preservatives -- Analysis
Abstract

Abstract A solid, crystalline fumigant (dazomet) with and without a supplemental copper compound was evaluated as an internal decay control treatment on Douglas-fir poles in two long-term field tests. Methylisothiocyanate [...]

Published
2010

6. Preventing fungal attack of freshly sawn lumber using cinnamon extracts

Author

Li, Shojun, Freitag, Camille, and Morrell, J.J.

Subjects
Lumber -- Protection and preservation -- Equipment and supplies -- Usage -- Production management, Antifungal agents -- Usage -- Equipment and supplies -- Protection and preservation -- Production management, Lumber industry -- Production management -- Equipment and supplies -- Protection and preservation, Business, Forest products industry, Usage, Protection and preservation, Production management, Equipment and supplies
Abstract

Abstract The potential for using cinnamon oil as an antimold and stain compound was investigated on ponderosa pine sapwood. This material is available as a food grade additive and offers [...]

Published
2008

7. Migration of boron from Douglas-fir lumber subjected to simulated rainfall

Author

Mitsuhashi, June, Love, Connie S., Freitag, Camille, and Morrell, Jeffrey J.

Subjects
Pentachlorophenol -- Analysis, Boron -- Analysis, Business, Forest products industry, Analysis
Abstract

Abstract The potential for migration of boron from wood pressure-treated with disodium octaborate tetrahydrate (DOT) during rainfall events was assessed using sawdust, small blocks, and sections of Douglas-fir boards. Boron [...]

Published
2007

8. Development of threshold values for boron and fluoride in non-soil contact applications

Author

Freitag, Camille and Morrell, Jeffrey J.

Subjects
Fungal diseases of plants -- Prevention, Wood -- Protection and preservation, Business, Forest products industry, Prevention, Methods
Abstract

Abstract The thresholds of boron and fluoride against selected decay fungi (Postia placenta, Gloeophyllum trabeum, and Trametes versicolor) were determined in Douglas-fir sapwood and heartwood in non-soil contact exposures. Even [...]

Published
2005

9. Preservative treatment of Scots pine and Norway spruce

Author

Rhatigan, Ron, Freitag, Camille, El-Kasmi, Silham, and Morrell, Jeffrey J.

Subjects
Scots pine -- Storage -- Research -- Methods, Wood -- Protection and preservation, Spruce -- Storage -- Research -- Methods, Business, Forest products industry, Research, Storage, Methods
Abstract

Abstract The ability to treat Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) with oilborne copper-8-quinolinolate or with waterborne chromated copper arsenate, ammoniacal copper zinc arsenate, or ammoniacal copper [...]

Published
2004

10. Ability of bleach and other biocide treatments to remove and prevent mold growth on Douglas-fir lumber

Author

Taylor, Adam M., Freitag, Camille M., and Morrell, Jeffrey J.

Subjects
Wood -- Testing -- Usage, Lumber -- Protection and preservation -- Usage, Bleaching materials -- Usage, Douglas fir -- Protection and preservation -- Usage, Business, Forest products industry, Testing, Usage, Protection and preservation
Abstract

Abstract Molds are an increasingly important issue for all building materials, including wood. While washing with bleach is a commonly recommended method for removing molds, and the associated discolorations, there [...]

Published
2004

12. Fumigant treatment of Douglas-fir bridge timbers

Author

Morrell, Jeffrey J., Love, Connie S., and Freitag, Camille

Subjects
Fumigants -- Analysis, Douglas fir -- Analysis, Business, Forest products industry
Abstract

Abstract The residual protective effect of sodium n-methyldithiocarbamate (NaMDC) fumigant was investigated in Douglas-fir timbers in a bridge in western Oregon using fungal colonization and levels of methylisothiocyanate (MITC; the [...]

Published
2013
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14. Properties of 'enhanced' OSB subfloor panels

Author

Taylor, Adam, Wang, Siqun, Freitag, Camille, and Morrell, Jeffrey J.

Subjects
Business, Forest products industry, Usage, Properties, Product development
Abstract

Abstract Oriented strandboard (OSB) manufacturers have developed 'enhanced' OSB subfloor products that they claim have improved thickness swell properties. Examples of these enhanced OSB panels were found to have reduced [...]

Published
2008

15. Potential for the use of hydroxylamine derivatives as wood preservatives

Author

Freitag, Camille, Li, Kaichang, and Morrell, J.J.

Subjects
Wood preservatives -- Research -- Usage, Business, Forest products industry, Usage, Research, Properties
Abstract

Abstract The potential of 17 hydroxylamine derivatives as wood preservatives was assessed on ponderosa pine sapwood blocks exposed to one of two decay fungi: Gloeophyllum trabeum or Trametes versicolor. Weight [...]

Published
2003

18. Decay resistance of China-fir (Cunninghamia lanceolata (Lambert) Hooker)

Author

Freitag, Camille and Morrell, J.J.

Subjects
Lumber -- Properties -- Evaluation, Biodegradation -- Evaluation, Business, Forest products industry, Evaluation, Properties
Abstract

Abstract The decay resistance of China-fir (Cunninghamia lanceolata) was evaluated in several tests using white- and brown-rot fungi in an American Wood Preservers' Association soil-block test. Although there was some [...]

Published
2006

26. ANTIFUNGAL EFFECTS OF HINOKITIOL AND ITS SODIUM SALT FOR WOOD PROTECTION.

Author

Shujun Li, Freitag, Camille M., Morrell, Jeffrey J., and Okabe, Toshihiro

Subjects
*ANTIFUNGAL agents, *WOOD, *PHARMACODYNAMICS, *SODIUM salts, *PLANT protection, *FUNGAL diseases of plants, *TRAMETES versicolor, *LEACHING
Abstract

The ability of natural and synthetic hinokitiol, as well as a water soluble derivative (hinokitiol sodium salt), to protect wood against fungal attack was examined. Synthetic and natural hinokitiol provided similar protection. All three materials exhibited similar antifungal activity against Aspergillus niger and Penicillium citrinum on yellow poplar wafers at concentrations of 1 mg/mL or greater. Fungal attack by Gloeophyllum trabeum or Trametes versicolor was completely inhibited in soil block tests in wood treated with any of the three extracts at concentrations of 20 mg/mL or greater. The water soluble hinokitiol sodium salt was highly susceptible to leaching, and blocks subjected to leaching had little resistance to fungal attack. The results suggest that further formulation development will be necessary to produce a water-soluble hinokitiol system that can resist leaching and retain biological activity. [ABSTRACT FROM AUTHOR]

Published
2012
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27. AN INTEGRATED APPROACH USING Bacillus subtilis B26 AND ESSENTIAL OILS TO LIMIT FUNGAL DISCOLORATION OF WOOD.

Author

Yu Wang, Jianmin Chang, Morrell, Jeffrey J., Freitag, Camille M., and Karchesy, Joseph J.

Subjects
BACILLUS subtilis, WOOD-decaying fungi, WOOD discoloration, WOOD-staining fungi, TRICHODERMA
Abstract

Bacillus subtilis and essential oils have been explored separately for their ability to limit colonization by wood stain and mold fungi, but neither approach has been completely effective. One alternative strategy would be to combine the bacterial biocontrol with one or more natural products extracts. In this report, the ability of combinations of B. subtilis B26 and 20 essential oils to limit fungal stain was explored on Douglas-fir sapwood wafers under controlled laboratory conditions. A number of extracts markedly improved the anti-fungal activity of B. subtilis B26, including 0.25% myrtlewood oil, 0.5% orange oil, 0.5% lime oil, and 1% Leyland cypress needles oil, which yielded improvements by 2 to 8 times. However, none of the combinations completely protected the wood from fungal attack. The results illustrate the difficulties associated with controlling the diverse array of organisms that can colonize freshly cut wood. [ABSTRACT FROM AUTHOR]

Published
2012
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29. Heartwood decay resistance by vertical and radial position in Douglas-fir trees from a young stand

Author

Morrell, Jeffrey J., Gartner, Barbara L., Freitag, Camille M., and Spicer, Rachel

Subjects
GENETICS, FOREST management, DOUGLAS fir, BOTANY
Abstract

Heartwood durability of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) was studied as a function of vertical and radial position in boles of trees with a wide range of leaf area/sapwood area ratios. Six 34-year-old trees were harvested from each of three plots established 14 years before: very dense, thinned, and thinned and fertilized. Heartwood samples from three radial positions and five heights were incubated with the decay fungus Postia placenta (Fr.) M.Larsen et Lombard. There were no significant differences in wood mass loss (decay resistance) by vertical or radial position. One could expect that trees with high leaf area/sapwood area could have the carbon to produce heartwood that is more resistant to decay than trees with lower leaf area/sapwood area. However, we found no relationship between leaf area above node 20, sapwood area there, or their ratio, and the decay resistance of outer heartwood at that node. These resultssuggest that, for young Douglas-fir trees, heartwood durability doesnot vary with position in the bole or with environments that alter the tree's balance of sapwood and leaf area. We suggest that young stands may thus be robust with respect to the effect of silvicultural regimes on heartwood durability. [ABSTRACT FROM AUTHOR]

Published
1999

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