scholarly journals Вплив нанесення лакофарбових матеріалів на блиск термомеханічно модифікованого березового (Betula Verrucosa) шпону

2019 ◽  
Vol 29 (10) ◽  
pp. 66-70
Author(s):  
Yu. V. Maksymiv ◽  
T. Krystofiak
Keyword(s):  
Betula Verrucosa

Зовнішній вигляд деревини та виробів з неї є одним з ключових факторів у виборі матеріалів. Одними з основних властивостей поверхні матеріалу є колір та блиск. Високий рівень блиску поверхні надає продукту більш преміального та приємного вигляду. Шпонування, як одна з технологій термічного модифікування, призначене для покращення деяких механічних, а також естетичних властивостей деревини, зокрема її блиску. Нанесення лакофарбових виробів здійснюють з подібною метою – покращення зовнішнього вигляду поверхні та її захист від зовнішніх впливів. Мета цього дослідження – встановити динаміку зміни рівня показника блиску термомеханічно модифікованої деревини після нанесення лакового покриття та порівняння його з немодифікованою деревиною. Для цього використано шпон, виготовлений з берези способом лущення (Betula verrucosa), модифікований за температури 150, 180 та 210 °С за допомогою контрольованого пресу ХОМко. На модифікований шпон було нанесено один або два шари лакового покриття, із або без міжшарового шліфування. Оцінювали блиск під кутами 20, 60 та 85° за допомогою блискоміра Erichsen PICOGLOSS 503. Проаналізувавши результати експерименту, з'ясовано, що в разі нанесених двох шарів лаку рівень блиску вищий, ніж за одного, що міжшарове шліфування не дає відчутного ефекту на блиск поверхні лакованої термомеханічно модифікованої деревини та що вибір клею може вплинути на кінцевий показник рівня блиску.

Quantification in mass units of Bet v 1, the main allergen of Betula verrucosa pollen, by a monoclonal antibody based-ELISA

1997 ◽  
Vol 27 (8) ◽  
pp. 926-931 ◽  
Author(s):  
J. RAMiREZ ◽  
J. A. CARPIZO ◽  
H. IPSEN ◽  
J. CARREIRA ◽  
M. LOMBARDERO
Keyword(s):  
Monoclonal Antibody ◽  
Bet V 1 ◽  
Betula Verrucosa

Polyprenols of Wood and Leaf Tissue of the Silver Birch, Betula verrucosa

Nature ◽  
1966 ◽  
Vol 212 (5068) ◽  
pp. 1364-1366 ◽  
Author(s):  
A. R. WELLBURN ◽  
F. W. HEMMING
Keyword(s):  
Leaf Tissue ◽  
Silver Birch ◽  
Betula Verrucosa

scholarly journals 17 Sensitization to Betula verrucosa and RBET V1 in Spain

2012 ◽  
Vol 5 ◽  
pp. S6
Author(s):  
Barbara Cases ◽  
Ramon Orjales ◽  
Guro Gafvelin ◽  
Francisco Carballada ◽  
Manuel Boquete ◽  
...  
Keyword(s):  
Betula Verrucosa

scholarly journals Classification of trees and tree species in Obrenovac “Mali park” by the elements of growth, vitality and ornamentalness

2010 ◽  
Vol 62 (4) ◽  
pp. 1119-1124 ◽  
Author(s):  
N. Stavretovic ◽  
M. Vuckovic ◽  
B. Stajic
Keyword(s):  
Tree Species ◽  
Juglans Regia ◽  
Platanus Acerifolia ◽  
Homogeneous Groups ◽  
Tree Vitality ◽  
Direct Measurements ◽  
Betula Verrucosa ◽  
The Town ◽  
Celtis Australis

The study was performed in Mali Park, in the town of Obrenovac. Our findings are based on the data obtained after direct measurements of elements of growth and the derived indicators of tree vitality and ornamentalness. Cluster analysis was applied to determine the relatively homogeneous groups of tree species. The results show that the group with the best functional characteristics includes Platanus acerifolia, Tilia grandifolia and Fraxinus ornus, and the group of species with inferior characteristics includes Betula verrucosa, Juglans regia, Celtis australis, Acer platanoides, Cedrus atlantica and Acer negundo.

scholarly journals Impact of Tree Pollen Distribution on Allergic Diseases in Serbia: Evidence of Implementation of Allergen Immunotherapy to Betula verrucosa

Medicina ◽  
2020 ◽  
Vol 56 (2) ◽  
pp. 59 ◽  
Author(s):  
Rajna Minić ◽  
Mirjana Josipović ◽  
Vesna Tomić Spirić ◽  
Marija Gavrović-Jankulović ◽  
Aleksandra Perić Popadić ◽  
...  
Keyword(s):  
Allergen Immunotherapy ◽  
Practical Importance ◽  
Allergic Diseases ◽  
Pollen Concentration ◽  
Tree Pollen ◽  
Starting Point ◽  
Pollen Species ◽  
Allergenic Plants ◽  
Betula Verrucosa ◽  
The Relationship

Background and objectives: The relationship between air pollen quantity and the sensitization of allergic patients is crucial for both the diagnosis and treatment of allergic diseases. Weather conditions influence the distribution of allergenic pollen and increases in pollen concentration may negatively affect the health of allergic patients. The aim of this study was to analyze the implementation of allergen immunotherapy with regard to air pollen concentration. Material and Methods: Here we examined the relationship between Betula air pollen concentration and the usage of Betula verrucosa allergen immunotherapy in Serbia. Examination covered the period from 2015 to 2018. Measurement of airborne pollen concentration was performed with Lanzoni volumetric pollen traps. The evidence of the usage of sublingual allergen immunotherapy (SLIT) was gathered from patients with documented sensitization to specific pollen. Results: During this period tree pollens were represented with 58% ± 21% of all measured air pollen species, while Betula pollen represented 15% ± 8% of all tree pollens. Betula pollination peaked in April. Allergen immunotherapy to Betula verrucosa in Serbia is entirely conducted as sublingual immunotherapy and represents 47.1% ± 1.4% of issued tree pollen SLIT. The use of pollen SLIT increased by 68% from 2015 to 2018, with an even greater increase in usage recorded for Betula SLIT—80%. Conclusions: This analysis shows a clear causative relationship between pollination and the type/prevalence of applied allergen immunotherapy. Information about the flowering seasons of allergenic plants is very important for people who suffer from allergy, for clinical allergologists, as well as for governing authorities. The presented data is of practical importance to the proper timing of immunotherapy initiation and of importance for urban landscaping. The obtained data can be the starting point for the instatement of a thorough epidemiological study and the inclusion of Serbia on the pollen map of Europe.

Quantification in mass units of Bet v 1, the main allergen of Betula verrucosa pollen, by a monoclonal antibody based-ELISA

1997 ◽  
Vol 27 (8) ◽  
pp. 926-931 ◽  
Author(s):  
J. RAMÍREZ ◽  
J. A. CARPIZO ◽  
H. IPSEN ◽  
J. CARREIRA ◽  
M. LOMBARDERO
Keyword(s):  
Monoclonal Antibody ◽  
Bet V 1 ◽  
Betula Verrucosa

BIOLOGICAL CHARACTERISTICS OF FOMES FOMENTARIUS, FOUND ON SPRUCE AND BIRCH

1967 ◽  
Vol 45 (10) ◽  
pp. 1853-1857 ◽  
Author(s):  
P. A. Suvorov
Keyword(s):  
Growth Rates ◽  
Biological Characteristics ◽  
Fruiting Bodies ◽  
Entire Surface ◽  
Oak Wood ◽  
Fomes Fomentarius ◽  
Pure Cultures ◽  
Betula Verrucosa ◽  
Picea Excelsa ◽  
Rates Of Growth

The comparative growth rates and wood destructive ability of two isolates of Tomes fomentarius (Fries) Kickx. were investigated under laboratory conditions. The pure cultures were obtained from 2-year-old fruiting bodies, growing on stumps of birch (Betula verrucosa Ehrh.) and spruce (Picea excelsa L.) trees situated in the same locality. Comparing the rates of growth of these isolates, on beer-must agar, it was found that isolates from spruce stumps grew faster and covered the entire surface of the medium in 11 days, whereas isolates from birch overgrew the same area in 16 days. The wood-destroying ability of spruce isolates was greater on pine, spruce, and oak wood blocks, whereas birch isolates were more destructive to birch, beech, aspen, alder, linden, and maple. The macro-and micro-scopic characteristics of mycelial mats of both isolates, as well as the fruiting bodies, revealed no difference between them.

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