نتایج جستجو برای: wood vesselsdiameter and ray dimensions in 4 species ulmus carpinifolia
تعداد نتایج: 21992108 فیلتر نتایج به سال:
Characterization of structural woods in historical buildings has a great importance in technological study of applied details. Herein, seven historical buildings located in Alborz, Isfahan and eastern Azerbaijan provinces related to Safavid and Qajar periods have been assessed. Samplings were done from structural woods of the buildings. Samples were prepared, sectioned and evaluated by transiti...
one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...
a one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (fccu) for gasoil feed has been developed in two distinct conditions, one for industrial fccu and another for fccu using various frequencies of microwave energy spaced at the height of the riser reactor (fccu-mw). in addition, in order to increase the accuracy of component and bulk diffusion, instanta...
Species in Phellinus s.s. are some of the most important wood-decaying fungal pathogens in northern temperate forests, yet data on species incidence in North America remains limited. Therefore, phylogenetic analyses were performed using four loci (ITS, nLSU, tef1 and rpb2) with isolates representing 13 species. Results of phylogenetic analyses using maximum likelihood and Bayesian inference rev...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
the addition of cottonwood and ash sapwood powder to ypssl2 medium influenced the mycelial growth of 13 species of freshwater lignicolous ascomycetes and hyphornycetes. these species fall into three groups with respect to their responses to the presence of leached or non-leached wood powder. neither wood type showed strong inhibitory effect on the mycelial growth of the species. leaching did no...
Sooty mold fungi are often associated with honeydew which insects secrete while feeding on the plant. A great variety of these fungi occur in the North of Iran, especially on Citrus ssp which is one of the most widely cultivated fruit trees in this region. During last 10 years, several collections of these fungi examined and 15 species have been recorded. In this paper seven previously unreport...
In this research, the effect of wood species and particle size on mechanicalproperties of wood plastic composites (WPC) made of fir (Abies alba) and beech(Fagus orientalis L.) sawdust and high density polyethylene (HDPE) wereinvestigated. Wood plastic composite (WPC) were made with 30% HDPE in abatch process at 185˚C, at two particle sizes of 40 mesh and 80 mesh. Maleicanhydride polypropylene (...
میزان مقاومت بیولوژیکی چوبدرون گونه های آزاد (Zelkova carpinifolia)، ملج (Ulmus glabra)، ممرز (Carpinusbetulus)، افرا (Acer laetum)، و زبان گنجشک (Pterocaria fraxinifolia) در مقابل حمله قارج رنگین کمان (Trametesversicolor) مورد مطالعه قرار گرفت. پس از 16 هفته، میانگین کاهش جرم نمونه ها به ترتیب 2.19% در آزاد، 41.69% در ملج، 45.64% در ممرز، 53.03% در افرا، و 43.08% در زبان گنجشک تعیین گردید. میز...
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