article{1208426, author = {Jo{\o}, {\E}va and Dewulf, Jo and Amelynck, Crist and Schoon, Niels and Pokorska, Olga and Simpraga, Maja and Steppe, Kathy and Aubinet, Marc and Van Langenhove, Herman}, issn = {1352-2310}, journal = {ATMOSPHERIC ENVIRONMENT}, keyword = {TEMPERATURE,UNITED-STATES,VOC EMISSIONS,FAGUS-SYLVATICA,LIGHT-INTENSITY,SCOTS PINE,SESQUITERPENE EMISSIONS,SEASONAL-VARIATION,MONOTERPENE EMISSIONS,ORGANIC-COMPOUND EMISSIONS,Induced VOC,Pseudotsuga menziesii,Fagus sylvatica L,Stress,Methyl salicylate,Sesquiterpene}, language = {eng}, number = {22}, pages = {3655--3662}, title = {Constitutive versus heat and biotic stress induced BVOC emissions in Pseudotsuga menziesii}, url = {http://dx.doi.org/10.1016/j.atmosenv.2011.04.048}, volume = {45}, year = {2011 ...
Ukrainetz, N.K.; Kang, K.-Young; Aitken, S.N.; Stoehr, M.; Mansfield, S.D., 2008: Heritability and phenotypic and genetic correlations of coastal Douglas-fir (Pseudotsuga menziesii) wood quality traits
1 Four O-acylated flavonol glycosides, new in the plant kingdom, were isolated from the needles of Pseudotsuga menziesii. Their structures were established by 1D and 2D NMR and MS data as: daglesioside I [kaempferol 3-O-[2,5-O-(4,4IV-dihydroxy)-β- truxinoyl]-α-L-arabinofuranoside] (), daglesioside II [kaempferol 3-O-[2,5-O-(4- hydroxy)-β-truxinoyl]-α-L-arabinofuranoside] ( 2 ), daglesioside III [kaempferol 3-O-[2,5- di-O-(E)-p-coumaroyl]-α-L-arabinofuranoside] ( 3 ), and daglesioside IV [kaempferol 3-O-[3,6-di-O-(E)-cinnamoyl]-β-D-glucopyranoside] ( 4 ). In addition, the known fl avonoids (E)-tiliroside, (E)-ditiliroside, astragalin (kaempferol 3-O-β-D-glucopyranoside), isorhamnetin, kaempferol, and quercetin were identifi ed. The cytotoxic activity of... compounds 1 and 3 was evaluated towards the HL-60, HeLa, and MDA-MB468 cell lines. ...
Fecht M, Maier P, Horst WJ. 2001. Peroxidase activity in the leaf apoplast is a sensitive marker for Mn toxicity and Mn tolerance in Vigna unguiculata (L.) Walp. In: HorstWJ, SchenkMK, BürkertA, ClaassenN, FlessaH, FrommerWB, GoldbachH, OlfsHW, RömheldV, SattelmacherB, SchmidhalterU, SchubertS, WirénNV, WittenmayerL, eds. Plant nutrition - food security and sustainability of agro-ecosystems. Dordrecht, The Netherlands: Kluwer Academic Publishers, 264-265 ...
REFERENCES : 1. Agee, James K. 1991. Fire history along an elevational gradient in the Siskiyou Mountains, Oregon. Northwest Science. 65(4): 188-199. [16293] 2. Agee, James K.; Finney, Mark; DeGouvenain, Roland. 1990. Forest fire history of Desolation Peak, Washington. Canadian Journal of Forest Research. 20: 350-356. [11035] 3. Agee, James K.; Huff, Mark H. 1980. First year ecological effects of the Hoh Fire, Olympic Mountains, Washington. In: Martin, Robert E.; Edmonds, Donald A.; Harrington, James B.; [and others], eds. Proceedings, 6th conference on fire and forest meteorology; 1980 April 22-24; Seattle, WA. Bethesda, MD: Society of American Foresters: 175-181. [10201] 4. Agee, James K.; Kertis, Jane. 1987. Forest types of the North Cascades National Park Service Complex. Canadian Journal of Botany. 65: 1520-1530. [6327] 5. Arno, Stephen F.; Hammerly, Ramona P. 1977. Northwest trees. Seattle, WA: The Mountaineers. 222 p. [4208] 6. Atzet, Thomas; McCrimmon, Lisa A. 1990. Preliminary plant ...
T.P Sullivan published a paper on a survey of Saturna Island Ecological reserve provided a description of its virgin Douglas Fir (Pseudotsuga menziesii) forest. The vegetation was quantitatively analyzed with respect to structure and composition. The tree strata dominated the structure of this reserve followed secondarily by the low shrub ad bryophyte strata. Pseudotsuga menziesii was the most important tree species with Tsuga heterophylla ( Western Hemlock) and Thuja plicata ( western red cedar) probably limited by low precipitation and soil structure. Gaultheria shallon ( salal) was the dominant understory species with Gaultheria shallon ( salal) and Hylocomium splendens dominating the Bryophyte stratum .. See the PDf file: Sullivan_DouglasFirForest. ...
This dwarf cultivar is spherical in shape and has green foliage. Needles are flat, soft and thin, and the branching is open. This plant enjoys full sun and
This cultivar is pyramidal in shape and has open, short branches. Needles are short, soft and thin with blunt tips. This plant enjoys full sun and a moist,
The same fungal individual can physically link plant individuals of the same and different species. Significant quantities of resources can also be passed between plants via these common mycorrhizal networks (CMNs), which may a large impact on plant ecology through facilitation of seedling establishment and mediation of competition. I examined this topic in a study of mycorrhizal fungi associated with Pseudotsuga menziesii and Lithocarpus densiflora. Typically Pseudotsuga dominates the canopy of mixed evergreen forests while Lithocarpus occurs mostly in the forest understory. Using a combination of restriction fragment length polymorphism (RFLP) and DNA sequencing to identify the fungi, I was able to show that there was a high potential for Pseudotsuga and Lithocarpus to be connected by CMNs in the field. While other studies had demonstrated that plants could be connected by CMNs in the field, my work was one of the first to show CMNs could occur between tree species that are distantly related ...
In February 1984, 2-yr-old bare-root Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings with symptoms typical of Phytophthora root rot (stunting, chlorosis, poor rootdevelopment) were infrequently found in a coastal forest nursery in southwest British Columbia. Phytophthora cryptogea Peth. & Laf. and P. drechsleri Tucker were isolated from diseased roots using cornmeal agar containing 20 μg/ml pimaricin. This nursery has relatively heavy (clay) soils, characteristic of forest nurseries in Washington and Oregon with Phytophthora-root-rot problems. This is the first report of Phytophthora root rot in a forest nursery in British Columbia and extends the northern range of this disease on Douglas fir.. References: Hansen, E. M., et al. Plant Dis. Rep. 63:307, 1979.. ...
Swiss needle cast (SNC) is a disease specific to Douglas-fir (Pseudotsuga menziesii) caused by the ascomycete Phaeocryptopus gaeumannii. Here we examine characteristics of the EM fungus community that are potentially useful in predictive models that would monitor forest health. We found that mean EM density (number of colonized root tips/soil core) varied nearly 10-fold among sites of varying levels of SNC, while mean EM fungus species richness (number of species/soil core) varied by about 2.5 times. Strong relationships were found between EM and SNC parameters: EM species richness was positively correlated with both Douglas-fir needle retention (R² = 0.93) and EM density (R² = 0.65); EM density also was significantly correlated with Douglas-fir needle retention (R² = 0.70). These simple characteristics of the EM fungus community could be used to monitor forest health and generate predictive models of site suitability for Douglas-fir. Based on previous findings that normally common EM types ...
Red alder (Alnus rubra Bong.) is well recognized as an effective host plant for the symbiotic fixation of N. While this fixation process leads to the rapid accumulation of N within the ecosystem, it also enhances nutrient accumulation in biomass and soil organic matter and increases nitrification and cation leaching. We hypothesized that changes in soil properties resulting from these processes would decrease site productivity for second rotation red alder. Adjacent stands of 55 yr old alder and Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) were studied at the Thompson Research Center on the Cedar River Watershed in western Washington, USA. The presence of red alder oaused the following soil changes: decreased soil solution pH, increased CEC, increased exchangeable acidity accompanied by a decreased soil pH and base saturation. This decreased soil and soil solution pH resulted in increased A1 concentration in the soil solution and on exchange sites as well as decreased P availability. To
Authors describe nineteen shrub-steppe communities in the Middle Fork and East Fork of the Salmon River, Idaho. Bluebunch wheatgrass (Pseudoroegneria spicata) and Idaho fescue (Festuca idahoensis) occur as dominants or major subdominants throughout the region. Big sagebrush (Artemesia tridentata), threetip sagebrush (A. tripartita), and low sagebrush (A.arbuscula) are dominants, especially in the East Fork and southern Middle Fork. Antelope bitterbrush (Purshia tridentata) communities exist throughout the region but are most abundant along the Middle Fork, where the species also occurs as a dominant in the understory of ponderosa pine (Pinus ponderosa) and Douglas fir (Pseudotsuga menziesii) stands on drier sites. Cliffy areas in all regions have curlleaf mountain mahogany (Cercocarpus ledifolius) and little greenbush (Glossopetalon nevadense) stands, reflecting the specialized habitats on which these communities occur. Shadscale saltbush (Atriplex confertifolia) communities occupy the driest ...
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Research published in the International Journal of Biomedical Nanoscience and Nanotechnology suggests that the needles of the plant Pseudotsuga menziesii, commonly known as the Douglas fir, could be used to sterilize nano devices destined for medical applications.
August 2014 by Wechsler & Montana Species by Common Name N=Natural Native P=Planted Native *=Nonnative Planted and/or Naturalized O=Nonnative ornamental H=High frequency M=Moderate frequency L=Low frequency Trees N/M - Big Leaf Maple (Acer macrophyllum) N/M - Bitter Cherry (Prunus emarginata) P/L - Cascara (Frangula purshiana) N&P/H - Douglas Fir (Pseudotsuga menziesii) P/L - Garry Oak…
This study had three objectives: (1) to determine the degree to which within-source genetic variation and genetic correlations differ among elevational sources of Douglas-fir [Pseudotsuga menziesii (Mirb). Franco var. menziesii]; (2) to ascertain the degree to which phenotypic stability differs among and within elevational sources; and (3) to compare the relationships among four measures of stability (variance, regression slope coefficient, deviation from regression and ecovalence). To accomplish the objectives seeds were collected from 10 parent trees in three populations from each of three elevations. Nine traits were measured on two-year-old seedlings grown in four test environments that factorially combined heated and unheated air and soil. Results support the hypothesis that the magnitude of within-source genetic variation is homogeneous among elevations. However1 genetic correlations between growth and phenological traits varied by elevation. For example, increased height was positively ...
In recent years, warming climate and increased fire activity have raised concern about post-fire recovery of western U.S. forests. We assessed relationships between climate variability and tree establishment after fire in dry ponderosa pine forests of the Colorado Front Range. We harvested and aged over 400 post-fire juvenile ponderosa pine (Pinus ponderosa) and Douglas-fir (Pseudotsuga menziesii) trees using an improved tree-ring based approach that yielded annually-resolved dates and then assessed relationships between climate variability and pulses of tree establishment. We found that tree establishment was largely concentrated in years of above-average moisture availability in the growing season, including higher amounts of precipitation and more positive values of the Palmer Drought Severity Index. Under continued climate change, drier conditions associated with warming temperatures may limit forest recovery after fire, which could result in lower stand densities or shifts to non-forested
Deterioration of fire-killed timber in the coastal mountains of southern Oregon and northern California was monitored over a 3 yr period (1988-1990). Defect was identified and measured on felled and bucked sample trees by using Scribner and cubic scaling rules. Douglas-fir (Pseudotsuga menziesii), grand fir (Abies grandis), white fir (A. concolor), ponderosa pine (Pinus ponderosa), and sugarpine (Pinus lambertiana), covering a wide range of geographic areas, site conditions, and tree size and age, were studied. One year afer death, Douglas-fir, sugarpine, and ponderosa pine had lost about 1% and the true firs 5% of their cubic volume. The sapwood of the pines was heavily stained. The occurrence of sap rot and weather checks increased the second year. Percent loss in all species was correlated with small-end scaling diameter. A logistic regression model predicting the incidence of cull was developed for use on logs that have been dead for 3 yr. ...
Where belowground resources are relatively abundant, naturally established trees sometimes occur in very close proximity to one another. We conducted a two-year study to assess the aboveground interactions between Douglas-fir (Pseudotsuga menziesii), grand fir (Abies grandis) and noble fir (Abies procera) seedlings planted in closely spaced (stems 10 cm apart) conspecific and heterospecific pairs. Paired seedling growth also was compared to seedlings planted with no neighbor. Stem height growth was not affected by the presence of a neighbor seedling, although diameter growth was slightly reduced. Branch diameter growth and weight were reduced where seedling crowns overlapped; branch morphological data suggested that this was caused by shading rather than mechanical interactions. Light measurements showed the potential for significant shading, particularly by the relatively large, dense crowns of Douglas-fir. Heterospecific pairs including Douglas-fir demonstrated the competitive production ...
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The two more or less disjunct areas in which this species occurs: Pacific coastal mountains and Rocky Mountains, experience a different climate and therefore sustain different forest types. The mostly much wetter (winter rainfall, up to 6,600 mm p.a.) and milder coastal ranges support the tallest conifer forests in the world, with Sequoia sempervirens in the southern part exceeding 110 m and with Abies grandis to 80 m, A. procera 85 m, Picea sitchensis 87 m, Pinus lambertiana 75 m, Pseudotsuga menziesii 100 m, and Tsuga heterophylla to 80 m tall. Many of these trees also exceed any of their congeners elsewhere in overall size (Van Pelt 2001). Thuja plicata, with max. 75 m, is one of the longest-lived in these forests, with veteran trees often in excess of 1,000 years. Other conifers in these coastal forests are Chamaecyparis lawsoniana (extreme southern part of range), Xanthocyparis nootkatensis, Calocedrus decurrens, Abies amabilis, Pinus monticola, Tsuga mertensiana, and Taxus brevifolia in ...
Forest habitats after harvesting or wildfire disturbance are usually dominated by early successional vegetation for up to 5-10 years, as well as downed wood or coarse woody debris (CWD). Abundance of Microtus voles is often highest in these sites with sufficient plant cover being crucial for population increases. The role of CWD for voles is less clear. We tested the hypotheses (H) that (H1) abundance and reproduction of meadow vole (Microtus pennsylvanicus) and long-tailed vole (Microtus longicaudus) populations would be higher on sites with greater amounts of downed wood and that (H2) this relationship would be stronger on sites with sparse vegetation cover. There were two study areas: a dry Douglas-fir (Pseudotsuga menziesii)-lodgepole pine (Pinus contorta) forest and a high-elevation Engelmann spruce (Picea engelmannii)-subalpine fir (Abies lasiocarpa) forest in southern British Columbia, Canada. We monitored the responses of meadow voles and long-tailed voles to three levels of downed wood ...
Fabrication and Properties of Polyethylene Glycol-Modified Wood Composite for Energy Storage and Conversion. Yun Li,a Xianjun Li,a,* Dandan Liu,b Xiyi Cheng,a Xia He,a Yiqiang Wu,a Xingong Li,a and Qiongtao Huang c. Green fir wood (Pseudotsuga menziesii) was modified with polyethylene glycol (PEG) to produce wood composites for energy storage and conversion. The PEG-modified wood composites were evaluated based on their dimensional stability, durability, and thermal properties by various analytical methods. The differential scanning calorimetry (DSC) results showed the melting temperature and the latent heat of the phase change material (PCM) composite were 26.74 °C and 73.59 J/g, respectively. Thermal cycling tests and thermogravimetric analysis confirmed the composite exhibited good thermal stability, reliability, and chemical stability. All treated specimens were free from noticeable defects, and the addition of a surface varnish coating prevented PEG from leaching. The PEG-modified ...
Douglas-fir (Pseudotsuga menziesii) and lodgepole pine (Pinus contorta) in southwestern Alberta were studied to determine the water sources used and the effect of changing soil moisture on tree ecophysiological function ...
Chemist Poushpi Dwivedi of MNNIT [Motilal Nehru National Institute of Technology] in Allahabad, India, and colleagues explain that one of the most troubling problems in biomedicine is bacterial infection at the site of implanted medical devices, prosthetics and sensors. They explain that despite advances in sterilization procedures and aseptic measures pathogenic microbes can still invade biomaterials and tissues. The researchers are developing an antimicrobial, self-sterilizing composite material derived from Douglas fir needles that is essentially a silver/chitosan bionanocomposite that can be used to safely coat medical implants and surgical devices to preclude microbial growth.. …. The team has now used an extract from Pseudotsuga menzietii together with silver nitrate solution to generate nanoparticles. These particles can then be readily dispersed in chitosan polymer to make a material that can coat metals and other materials. The plant extract acts as a natural chemical reducing agent ...
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Aerogel is a material with porous network structure, low density, high specific surface area, and low thermal conductivity. Aerogel has been used for thermal insulator, supercapacitor, storing medium, filter material for extremely fine particles, drug delivery systems, and drug coating. In the present study, whole biomass aerogels with high porosity, large surface area and low-density open pore 3D structure were prepared from Douglas fir without hemicellulose removal and delignification process. Lithium bromide molten hydrate was used to dissolve â?? regenerate the cellulose or biomass to form cellulosic network structure. The results indicated that the density of the aerogels prepared from Douglas fir whole biomass ranged from 4.6 to 29 mg/cm3 with porosity from 99.7% to 98.1%. The aerogel properties changes with biomass pretreatment, different reaction conditions, and biomass loading were investigated ...
Tis the season when many people purchase decorative conifer trees; otherwise they own some ersatz version thereof. No option exists in our household because Mrs. Phactor is of the most firm opinion that only a natural tree will do. On an ecological basis cut conifers are grown as a crop and can be fully recycled. So here is your holiday conifer primer. 1. Evergreen is not synonymous with "pine tree" or "conifer". 2. The vast majority of trees sold this time of year are firs, douglas-firs, or pines, and these are three different genera (Abies, Pseudotsuga, and Pinus respectively). 3. Douglas-fir is not a true fir, but most confusingly its also called Oregon pine and Douglas spruce. See the problem with common names? ...
0019]That is, the present invention relates to the herbicidal composition and weed controlling method as described below. [0020]1. A herbicidal composition comprising an oily extract obtained from a lumber of trees belonging to the order Pinales. [0021]2. The herbicidal composition as described in 1 above, wherein the trees belonging to the order Pinales are trees belong to the family Cupressaceae or Pinaceae. [0022]3. The herbicidal composition as described in 2 above, wherein the trees belonging to the order Pinales are the trees belong to the genus Cryptomeria, Thuja, Thujopsis, Chamaecyparis, Cupressus or Juniperus belonging to the family Cupressaceae; or to the genus Picea, Tsuga, Cedrus, Pseudotsuga, Larix, Pinus or Abies belonging to the family Pinaceae. [0023]4. The herbicidal composition as described in 3 above, wherein the tree belonging to the order Pinales is Cryptomeria japonica in the genus Cryptomeria in the family Cupressaceae. [0024]5. The herbicical composition as described in ...
Xiao-Xin Wei, Zu-Yu Yang, Yan Li og Xiao-Quan Wang (2010). «Molecular phylogeny and biogeography of Pseudotsuga (Pinaceae): insights into the floristic relationship between Taiwan and its adjacent areas». Molecular Phylogenetics and Evolution. 55 (3): 776-785. ISSN 1055-7903. PMID 20214996. doi:10.1016/j.ympev.2010.03.007 ...
in Plant and Soil (2010), 336(1-2), 99-106. Abstract : Silicon uptake by terrestrial plants impacts the Si land-ocean fluxes, therefore inducing significant modifications for biogeochemical cycle of Si. Understanding the mechanisms that control Si ... [more ▼]. Abstract : Silicon uptake by terrestrial plants impacts the Si land-ocean fluxes, therefore inducing significant modifications for biogeochemical cycle of Si. Understanding the mechanisms that control Si uptakes by forest vegetation is of great interest for the study of the global Si cycle as the worlds total forest area corresponds to about 30% of the land area. Our study compares Si uptake in controlled conditions by two coniferous species (Pseudotsuga menziensii and Pinus nigra) exhibiting contrasting Si uptake in the field. For this purpose, seedlings were grown for 11 weeks under controlled conditions in hydroponics with different Si concentrations (0.2 to 1.6 mM) in nutrient solutions. The Si concentrations were greater in ...
Researchers at Portland State University and Oregon State University looking at the aftermath of wildfires in southwestern Oregon and northern California found that after 20 years, even in severely burned areas, Douglas fir ...
The 2016 Report on Interior and Exterior Panel Douglas Fir Doors and Doors with Glazed Sections: World Market Segmentation by City The 2016 Report on - Market research report and industry analysis - 9140325
Douglas Fir Balboa Smooth Brace from Ekena Millwork brings a creative and innovative look to your outdoor living space. Easy to install.
|p|Douglas David was born in 1971 into the Nuu-chah-nulth nation, on his father’s side and the Sioux Dakota nation on his mother’s side. Both his parents are artists, and from birth Douglas has been exposed to the traditional art of these cultures. At the age of eight Douglas realized his visions could be transferred from thought to hand and has been carving ever since. Douglas acknowledges his father Joe David, a renowned master carver along with Douglas’s mother and ancestral spirits as his teachers and mentors.|/p||p|Douglas’s specific crests belonging to the Nuu Chah Nulth nation are the Wolf, Killerwhale, and Thunderbird. These crest images are prevalent in his works on wood and raw hide. Douglas currently resides in Port Alberni with his wife, Angela and their seven children. |/p| |p| Douglas is an experienced carver and his works are in various collections worldwide. He is considered part of the next generation of master artists of the Northwest Coast. |/p|
Flower bisexual, generally radial; calyx lobes generally 5, generally fused at base, generally persistent, enlarging in fruit; corolla generally deciduous, rotate to cylindric, lobes generally 5, appendages in pairs on tube between filaments or 0; stamens generally 5, epipetalous, filament base sometimes appendaged, appendages scale-like; ovary generally superior, chamber 1, placentas 2, parietal, enlarged into chamber, sometimes meeting so ovary appears 2 5-chambered, styles 1 2, stigmas generally head- ...
Reference: 10054. MEGASTIGMUS SPERMOTROPHUS . Douglas fir cones to show development at time of spraying against fir wasp on 30th May . Location: New Forest, Hampshire , England ...
Reference: 10051. MEGASTIGMUS SPERMOTROPHUS . Douglas fir cones to show development at time of spraying against fir wasp on 30th May . Location: Bedgebury Pinetum , Kent , England ...
Worldwide it seems like Douglas Fir, Fraser Fir, Scots Pine and Easter Cedar are the favourite choices for Yule and Christmas Trees. It is the Scotch Pine that surpasses them all in Europe, but in the USA the Douglas Fir in the North and Fraser Fir...
Native across the western half of North America, Douglas fir is a needled conifer that reaches great heights when mature. In fact, it is the largest member of the pine family. Young trees have pleasing pyramidal habits, making them ideal as cut Christmas trees. Wild populations tend to be found at high elevations and favor sunny, dry, rocky slopes. Farther north in its range this tree is most commonly found on the south side of hills and mountains.. The spreading branches of this majestic tree are lined with whorls of flattened, resinous needles that are dark green on top and have whitish waxy bands beneath. The branchlet tips have pointed imbricate buds that are butterscotch brown. Distinctive female cones with unique tongue-like appendages hang from the branches, often by twos. Douglas Fir grows best in full sun and prefers slightly acid, well-drained soil. Young trees are pyramidal, with branches that extend to the ground, so they make effective screens. But, as the years go by the bottom ...
A gene-switching mechanism dating back 400 million years to the very first plants that made it onto land has been found by plant biologists at UC Davis. A family of genes required for stem and leaf development in flowering plants is controlled in the same way in everything from mosses to a Douglas fir, according to postdoctoral researcher Sandra Floyd and John Bowman, professor of plant biology at UC Davis.. The mechanism depends on microRNAs, short pieces of RNA that switch genes off by interfering with messenger RNAs that are produced when genes are read. Floyd and Bowman looked at a family of genes found in all major groups of land plants called class III HD-Zip genes. They found that these genes are controlled by microRNAs and that the microRNA binding region is almost identical in moss, liverworts, club moss, ferns, Douglas fir, Mexican yew and Arabidopsis, a flowering plant often used in laboratory research. Not only are the amino acid sequences of the proteins highly conserved, but also ...
Jim, the issue is not so much the heat- but having said that waaay too much heat will destroy any wood, but its rather the heat being applied while the mc of the wood is very high, and the heat is used ( and sometimes steam is used in the kilns too) to expel the moisture in the wood, and as time is money in the mills, this is done at a rate that the cell walls cannot handle. The consequences are an excessive expansion of the moisture in the cells and the very rapid movement of the moisture from the core of the piece of lumber towards the outside that it actually ruptures the cell walls ...
Abstract. This study investigated catalytic microwave pyrolysis of Douglas fir sawdust pellets using carbon catalysts produced from corn stover. The effects of catalyst to biomass ratio on the bio-oil, syngas, and biochar yields were determined. Functional groups (carbonyls, phenolics, lactones, carboxyls) of carbon catalysts and GC/MS analysis were used to study the catalytic pyrolysis of Douglas fir sawdust pellets. Surface functional groups of carbon catalysts were quantified by titration with bases of different ionization potential before and after catalytic pyrolysis. GC/MS analysis results showed that the phenols and hydrocarbons in bio-oil increased with the increase of the carbon catalyst loading while the guaiacol decreased. Comparison between the carbon catalyst from before and after microwave catalytic pyrolysis showed that the variation in the amount of carbonyl group has a close relationship with the upgrading bio-oils. The carbon catalyst might be served as a cost-competitive ...
I have both blue and orange home centers near where I live, but I am also fortunate to live near a locally owned lumberyard/home center that carries a large stock of Douglas fir 2X lumber. (We dont have much Southern Yellow Pine in upstate New York unless its pressure treated, or 5/4 stair tread.) Last fall, when planning to build a Knock-Down Nicholson workbench, I went to the local lumberyard/home center to get some bolts and screws. As usual, I wandered out to the lumber yard to check out the Douglas Fir 2 X 12s. They carry these in 8′, 10′, 12′, 16′, 22′, and 24′ lengths. Walking past the 24′ stack, a beautiful straight, relatively clear 2X12 caught my eye. It was cut near the pith, so a large portion of it was quarter-sawn. Damn, I didnt have my saw or my sawhorses with me! Well, I figured, there are plenty of boards to choose from, even if this one was gone when I came back.. I had dropped my wife off at the grocery store before going to get the bolts and screws. When I ...
FRANCO uses two-dimensional finite element theory and applications for mechanical deformation and heat conduction, and determines the temperature distribution from the fuel center to the coolant adjacent to the clad at a position along the fuel rod axis. FRANCO calculates the average temperature of each radial division, the nodal displacement, and strain and stress within the fuel pellet and clad. The principal stresses, which represent maximum and minimum stresses within an element, result from Mohrs circle relationship between normal stresses. FRANCO is capable of predicting the thermo-mechanical behavior in the radial direction of a single fuel rod for both boiling water reactors (BWRs) and pressurized water reactors (PWRs). The cross sectional plane geometry of fuel rod is modeled using three-node constant strain triangular finite elements, and both thermal and mechanical solutions are computed with the same finite element configurations. The local linear heat generation rate is modeled ...
In September 1939 World War II began. On October 23, 1940, Hitler and Franco met in Hendaye in France to discuss the possibility of Spains entry on the side of the Axis. However, Francos demands, including supplies of food and fuel, as well as Spanish control of Gibraltar and French North Africa, proved too much for Hitler. At the time Hitler did not want to risk damaging his relations with the new Vichy French government. (An oft-cited remark attributed to Hitler is that the German leader said that he would rather have some of his own teeth extracted than to have to personally deal further with Franco.)[65][66] Franco had received important support from Adolf Hitler and Benito Mussolini during the Spanish Civil War, and he had signed the Anti-Comintern Pact. He described Spain as part of the Axis in official documents, while offering various kinds of support to Italy and Germany. He allowed Spanish soldiers to volunteer to fight in the German Army against the USSR (the Blue Division), but ...
By now, it should be clear to all that James Franco is full of boundless energy, ambition and curiosity, a one-man Renaissance. Most recently, he made his Broadway debut in a revival of Of Mice and Men; directed a play off-Broadway, The Long Shrift; published a book of poetry, Directing Herbert White; starred in Gia Coppolas adaptation of his book of short stories, Palo Alto; and starred in Paul Haggis Third Person. With all that, Franco still found time to produce Kink, a documentary that goes behind the scenes at the San Francisco fetish porn purveyor of the title. A small role in the 2012 drama About Cherry, co-written by Kink actress Lorelei Lee and shot largely at Kinks Armory studios, piqued Francos curiosity, and the documentary is a product of his Rabbit Bandini production company. Kink premiered at the Sundance Film Festival, where Franco, 36, explained his involvement and his fascination with adult subject matter. When I got to the Armory building, one of the head guys
At 1,311 pounds, Juan Pedro Franco was the heaviest man in the world-and he was not happy about it.. The 33-year-old was bedridden for seven years.. He finally got biliopancreatic bypass surgery.. He is returning home just over a week after his operation. Doctors are pleased with his recovery.. "I can tell you he has recovered adequately and satisfactorily. We thought the recovery would be more complex, but it has been very, very good," said surgeon Jose Antonio Castaneda.. Francos life is still at risk due to his obesity. His organs could simply give up and shut down at any time.. Franco is unfazed. He has been living with the risk of death for a decade. Now he also has a glimmer of hope.. "The doctors have said I am doing well, they have told me up to now there have not been any complications, we have not had any setbacks," Franco said.. "At the moment I am on a strict diet they have set, but hey, lets do it," he said.. ...