نتایج جستجو برای: australian pine cones
تعداد نتایج: 79489 فیلتر نتایج به سال:
In this paper we show how to lift Lagrangian immersions in $\mathbb{C} P^{n-1}$ produce cones ^n$, and use process several families of examples special cones. Moreover cones, isotopic the Harvey-Lawson trivial whose projections are with few transverse double points.
Knowledge about the relationship between tree height (H) and diameter at breast height (D) is crucial for forest planning, monitoring, biomass estimation, and forest stands dynamics description. In this study, 20 different height-diameter models were evaluated to estimate accurately the height of the trees of Pinus brutia and Cupressus sempervirens var. horizontalis species in Arabdagh region (...
Background: Nanoparticles have been applied to medicine, hygiene, pharmacy and dentistry, and will bring significant advances in the prevention, diagnosis, drug delivery and treatment of disease. Green synthesis of metal nanoparticles has a very important role in nanobiotechnology, allowing production of non-toxic and eco-friendly particles.Objectives: Gr...
Extensive mortality of whitebark pine, beginning in the early to mid-2000s, occurred in the Greater Yellowstone Ecosystem (GYE) of the western USA, primarily from mountain pine beetle but also from other threats such as white pine blister rust. The climatic drivers of this recent mortality and the potential for future whitebark pine mortality from mountain pine beetle are not well understood, y...
Pine wilt disease caused by pine wood nematodes is endemic to North America. Pine wood nematodes have already spread to East Asia, including China, Taiwan and Korea in addition to Japan. The pine wood nematode, Bursaphelenchus xylophilus, was discovered in Portuguese pine forests in 1999. If it were to become established in the pine forests in Europe, it could become one of the most serious thr...
Motivated by pine cones and plant seeds that open or close in response to changes humidity thanks the shrinking swelling of hygroscopic bilayers, given recent interest artificial systems mimic motility seeds, we consider bilayers consisting two adhering elongated thin layers made gels, modeled as active, transversally isotropic elastic materials. The direction transverse isotropy is set one fib...
Biochar (BC) is a material that has many applications in agricultural and environmental activities. The aim of the study was to define influence BC produced low-temperature pyrolysis from various organic waste materials, including one-month-old compost (OMOC), pine bark (PB), needle mulch (NM), cones (PC) maple leaves (ML), on soil enzyme activity as well its relation with matter properties. A ...
Background: The antioxidant components have been identified in some pine species. Antioxidant properties of proantocyanidins reduce free radicals induced by DNA fragmentation and lipid proxidation and also proanthocyanidines could curb lipid peroxidation. Objective: In this study, we analyzed different parts of Pinus eldarica (bark, seed and needle) and assessed their antioxidant contents. ...
Nacrtak Roadside chipping is a common harvesting system to produce chips in Australian plantations. This study investigated the productivity and cost of road-side chipping operation (chipping logs extracted by forwarder to the road side) using a Morbark chipper with flail delimber in a first thinning of Pinus radiata stands. An elemental time study method was used to collect the time working cy...
In this research, the possibility of using dried leaves of pine (Pi), tire-rubber wastes (TR) and rice hull (Ri) as tomato growth media in soilless culture system was investigated. Tomato seeds were grown in sterilized sand and after one month, the seedlings were transplanted to various growth media including dried leaves of pine- perlite (Pi:Pe), dried leaves of pine- rubber wastes (Pi:TR), co...
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