natural, renewable, biodegradable and low pollution hemp fibers are an alternative to trees xylem and artificial fibers. in this study, xylem and bast fiber properties of six iranian hemp populations including length, width, wall thickness, lumen width and wall index were measured and compared. to this purpose, collected population seeds from different parts of iran were nursed in a controlled ...

In this study, it was found that the addition of wood had a reducing effect on water absorption (WA) and thickness swelling (TS) properties in gypsum-based boards. The lowest WA value 41.56% sample prepared with cedrus’s bark/needle mixture (KaI3; 3:2 by weight). It has also been realized experimental boards made only bark-gypsum (SKa6), cone-gypsum (SKo6) needle-gypsum (SI6) proportions show T...

• Bark thickness at breast height can be predicted by a species-specific, DBH-based model. Combining stem taper and bark models is suggested to predict profile. Upper lower portions of tree reliably the two-stage method. Polynomial profile more accurately than variable-exponent models. Tree bark, as outermost protective layer stems, an important indicator evaluate fire resistance properties tre...

Journal: Canadian Journal of Forest Research Manuscript ID cjfr-2017-0091.R1 Manuscript Type: Article Date Submitted by the Author: 13-Jun-2017 Complete List of Authors: Eberhardt, Thomas; USDA Forest Service, Forest Products Laboratory Dahlen, Joseph; University of Georgia, Warnell School of Forestry and Natural Resources Schimleck, Laurie; Oregon State University, College of Forestry Keyword:...

Red-cockaded woodpeckers (Picoides borealis) forage on the boles of living pine trees for a variety of arthropods. To assess the availability of prey under differing stand conditions, we sampled arthropods that crawled up the boles of 300 living longleaf pine trees (Pinus palustrtis) ranging in age from 20-100 years with passive traps over a l-year period. We identified, counted, ovendried, and...

Control of wound infections, especially those associated with methicillin-resistant Staphylococcus aureus, is necessary for the wound healing process. Selection of topical agents should be based not only on their ability to eliminate pathogenic bacteria, but also on whether they may be detrimental to tissue repair. Two randomized, controlled in vivo studies using different porcine models were c...

A study concerning the effects of elevation and exposure of the spruce forests on defoliation levels of oriental spruce (Picea orientalis (L.) Link.) by Ips typographus L. was carried out during 2005 and 2006 in Artvin-Hatila National Park, Turkey Nine spruce stands were selected at 3 zones of elevations (1000-1350 m, 1350-1700 m and 1700-2000 m) and at different aspects to assess the role of e...

Objective: The present study aimed to develop transdermal patches containing alkaloid fraction, flavonoid fraction and tannin fraction from Ficus racemosa bark and to assess its wound healing potency. Methods: In the present investigation, herbal transdermal patches were formulated using natural polymer Protanal LF10/60 by solvent evaporation technique. The physicochemical parameters like flexi...