نتایج جستجو برای: salix nigra
تعداد نتایج: 10949 فیلتر نتایج به سال:
Tree barks are considerable waste streams in forest industries, and a potentially interesting resource for biorefineries. Barks of six relevant tree species, namely poplar (Populus × canadensis), black locust (Robinia pseudoacacia), red oak (Quercus rubra), willow (Salix sp.), Corsican pine (Pinus nigra subsp. laricio), larch (Larix decidua), were anatomically chemically characterized. Anatomic...
parkinson's disease is a degenerative disorder of the central nervous system. the motor symptoms of parkinson's disease result from the death of dopamine-generating cells in the substantia nigra, a region of the midbrain the cause of this cell death is unknown. homocysteine (hcy) is a non-protein amino acid. it is a homologue of the amino acid cysteine. the elevated levels of homocysteine in pl...
LB-7. Tarek Hassanein1,⇑ Karen D. Sims Michael Bennett Norman Gitlin Eric Lawitz Tuan Nguyen Lynn Webster Zobair Younossi Howard Schwartz Paul J. Thuluvath 11 non-financial support from AbbVie, Achillion, BioCryst, Biotica, Enanta, Gilead Sciences, Idenix, Janssen, Kadmon, Merck, Novartis, Presidio, Santaris, Theravance, and Vertex. L. Webster has received consulting fees from AcelRx, Acura, As...
Two new salicin derivatives, saliglandin (1) and 6'-O-(Z)-p-coumaroylsalicin (2), along with fourteen known analogues (3-16) were isolated from the twigs of Salix glandulosa Seemen. The structures of 1-16 were characterized by the use of NMR methods ((1)H and (13)C NMR, (1)H-(1)H COSY, HSQC and HMBC), chemical hydrolysis, and GC/MS. The full NMR data assignment of the known compounds 6, 13, and...
We investigated the association between ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) fungi and pioneer woody plant species in areas devastated by the eruption of Mt. Usu, Japan, in 2000. We observed 8 woody plant species at the research site, most of which were associated with ECM and/or AM fungi. In particular, dominant woody plant species Populus maximowiczii, Salix hultenii var. ang...
In the last decade, plant ecologists have focussed more on the occurrence of positive plant–plant interactions than ever before. Especially in severe environments, such as the Arctic, species removal experiments tend to find facilitative rather than competitive effects, casting doubt on the importance of competition under extreme growing conditions. Two approaches to measure plant–plant interac...
The morphological species concept is based on morpho-logical traits, which are often subject to subjectivity or artifact. Molecular evidence is needed to test the reliability of morphological classification of taxa that are controversial and to provide appropriate taxonomic de-limitation. In this study, we used 15 single-copy nuclear loci and 2 chloroplast fragments to verify the morphological ...
Research is related to the biology and ecology of white mistletoe (Víscum álbum L.), with an analysis its impact on dendroflora natural artificial ecosystems. The sequence stages invasive cycle mistletoe, starting from stage infection, intensity invasion (the degree spread in crown), suppression host trees, their death biodegradation, as well mechanism these processes. These have different dura...
جنس بید با تأسیس بیدستان در محیط یکنواخت که از قسمت های مختلف ایران جمع آوری شده بودند به طور تجربی و تاکزونومیکی کاملاً مرور شده اند. در این مطالعه تعداد کلی گونه های بید از 12 عدد به 31 گونه منفک و 7 دورگ افزایش یافته است. در این تحقیق s. issatissensis از s. excelsa var. rodonii به عنوان گونه مستقل ابقاء شده است و گونه های s. dinsmorei ،s. daviesii، s. persica و s. australior از حالت متراد...
تحقیق حاضر با هدف جمعآوری، شناسایی و ارزیابی مورفولوژیکی و فنولوژیکی بیدهای (salix spp.) کردستان از سال 1380 بهمدت هفت سال در سنندج اجرا شد. پس از تعیین و ثبت خصوصیات پایههای مادر در رویشگاه های بید استان، قلمه آنها گرفته شد و برای کاشت در کلکسیون، به نهالستان زاله سنندج منتقل شد. عمل جمعآوری تا سه سال (81-1379) ادامه یافت. انتقال نهال های ریشه و ساقه دو ساله پایهها (از هر پایه نه نهال) ب...
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