نتایج جستجو برای: birch tree
تعداد نتایج: 174023 فیلتر نتایج به سال:
Lichens are considered by researchers as bioindicators of environmental pollution artificial radionuclides, including 137Cs. One these bioindicator species is epiphytic lichen Hypogymnia physodes (L.) Nyl, the use which for radioecological monitoring can be modified several factors: tree species, placement on (branches – trunk), height sampling, etc. The purpose this study was to investigate sp...
Pollen records from the western Great Lakes region of North America show substantial increases in birch pollen percentages during the late Holocene. The vegetational and population dynamics underlying the birch increase have received little attention, in part because of the inability to discriminate among species of birch based on pollen morphology. We used analyses of pollen and plant macrofos...
BACKGROUND The character of immune responses to allergens during the first years of life may decide whether the individual will become tolerant or develop allergy later in life. OBJECTIVE To study the development of immune responses to the seasonal inhalant allergen birch over the first 7 years of life. METHODS Blood samples were obtained from 21 children who were followed prospectively fro...
BACKGROUND Birch pollen is an important outdoor allergen able to aggravate symptoms in atopic dermatitis (AD). Specific immunotherapy (SIT), an established procedure for allergic airway diseases, might also represent an attractive therapeutic option for the causal treatment of allergen-triggered cutaneous symptoms in these patients. Studies with house dust mite SIT have already shown beneficial...
On the basis of qualitative and quantitative analysis with liquid chromatography--electrospray ionisation mass spectrometry, the foliage of dwarf birch (Betula nana L.), silver birch (B. pendula Roth) and mountain birch (B. pubescens ssp. czerepanovii (Orlova) Hämet-Ahti) were found, for the first time, to contain the same individual HTs that were described earlier for white birch (B. pubescens...
The structure of forests has changed with an increase in soft-wooded broadleaved species over the past decade. demand for hard-wooded can be met by replacing them compressed wood species. Existing technologies do not fully take into account density variations that exist along height a tree trunk. In this study, we examined variability birch and aspen microstructures trunk, including vessels per...
While the availability of large and diverse datasets has contributed to significant breakthroughs in autonomous driving indoor applications, forestry applications are still lagging behind new forest would most certainly contribute achieving progress development data-driven methods for forest-like scenarios. This paper introduces a dataset called \textit{FinnWoodlands}, which consists RGB stereo...
BACKGROUND Late allergic reactions are common in the course of allergen-specific immunotherapy and even occur with allergy vaccines with reduced IgE reactivity. OBJECTIVE We sought to study atopy patch test (APT) reactions and T-cell responses to the recombinant birch pollen allergen Bet v 1 and recombinant hypoallergenic T-cell epitope-containing Bet v 1 fragments in patients with birch poll...
Material and Methods The clinical history and the positive SPT with the birch extract were the condition for qualifications. 23 patients included in the first group were only birch allergic. 35 patients in the other group had birch pollen allergy and they reported symptoms after eating apple, celery, carrot, tomato, banana, peach, peanut and hazelnut. The skin tests were performed and serum IgE...
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