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Wyszukujesz frazę "oak wood" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Analiza jakościowa i wartościowa drewna dębowego w sprzedaży submisyjnej drewna cennego w RDLP w Katowicach
Quality and value analysis of oak wood in the submission sale of valuable wood in the Regional Directorate of the State Forests in Katowice
Autorzy:
Mirski, R.
Malinowski, Z.
Wieruszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/979172.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
oak wood
submission sales
wood defects
raw material price
Opis:
In special trade of the valuable wood raw material, in addition to system sales, the submission form is preferred. Increasing demand for high quality wood leads to an increase in market prices. Oak is that species that is devoted for the sale in the group of valuable wood in Poland. Oak timber have a number of features limiting their industrial significance. Its suitability is affected by quality and technical properties. The price level, which is a measure of the economic usefulness of wood, is affected by the share of defects and offered dimensions. The paper reviews the impact of not only the quality factor, but also indicates the correlation between the dimensional parameters of oak wood offered and the average sales prices of special raw material in the submission sales in the Regional Directorate of State Forests in Katowice. Attention was drawn to the influence of both the diameter of wood directed to trade at a constant log length. The paper presents the variability of oak wood prices, where a characteristic factor translating into an increase in the value of the raw material is undoubtedly the diameter of the logs of the valuable raw material.
Źródło:
Sylwan; 2020, 164, 06; 467-473
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasięg oddziaływania iniekcji hydrostatycznych w drewnie dębu szypułkowego (Quercus robur L.)
Autorzy:
Zarzyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/1022214.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drewno debowe
iniekcja hydrostatyczna
Quercus robur
lesnictwo
dab szypulkowy
zasieg dzialania
drzewa lesne
hydrostatic injections
sessile oak wood
effect range
Opis:
Hydrostatic injections are the method of applying chemicals directly into the wood of living trees. Laboratory tests proved their usefulness. However, still an open question remained the range of penetration of the liquid fed into the tree this way. To answer this question, a series of experiments were performed, using water with an addition of methylene blue – a dye leaving durable effects in the wood – as the working liquid. This paper depicts the results of this experiment.
Źródło:
Sylwan; 2005, 149, 04; 15-20
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości i możliwości wykorzystania drewna czarnego dębu pochodzącego ze znalezisk krajowych
Svojstva i vozmozhnosti ispolzovanija dreviesiny chernogo duba proishodjashhego iz otechestvennykh raskopok
Properites and possibilites of utilization of black oak originatting from the home discoveries
Autorzy:
Kokocinski, W.
Powiązania:
https://bibliotekanauki.pl/articles/805874.pdf
Data publikacji:
1990
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
wykorzystanie
drewno
czarny dab
znaleziska krajowe
material drzewny
budowa drewna
wlasciwosci
utilization
wood
bog oak
wood material
wood anatomy
wood property
Opis:
Представленные в статье исследования были направлены на рпределение числовых данных об основных химических, физических и механичеcких свойствах древесины черного дуба происходящей из отечественных pаскопок локализованных на речной террасе Вислоки и заливной террае реки Бобр. Проведенные исследования показали, что древесина черного дуба после сушки до воздушно-сухого состояния характеризуется высокими механическими свойствами. Одним из существенных недостатков древеcины ископаемых дубов является ее повышенная склонность к десорбционным трещинам в сравнении с современной древесиной. Можно констатировать, что древесина черных дубов пригодна для использования в деревоперерабатывающей промышленности и в художественном ремесле для производства ряда очень ценных издений.
The aim of the investigations as presented in the paper was to determine the numerical data about basic chemical, physical and mechanical properties of black oak wood originating from home discoveries located on a terrace of the Wisłoka river and on the flooded terrace of the Bóbr river. The investigations have proved that the black oak wood after drying to the air-dry state is characterized by high mechanical properties. One of the significant shortcomings of the fossil oak wood is its greater susceptibility to desorption crackings as compared with the contemporary wood. One can presume that the black oak wood originating from both discovery places could be made use of in the wood processing industry and artistic craft for production of many very valuable articles.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1990, 379
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Galasy rodzimych gatunków dębu jako potencjalny surowiec garbnikowy
Gall-nuts of native oak species as a potential tannin raw material
Autorzy:
Bilek, M.
Kozlowska-Tylingo, K.
Gostkowski, M.
Staniszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/980195.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
uboczne uzytkowanie lasu
dab
Quercus
galasy
garbniki
taniny
zawartosc garbnikow
forest utilisation
non−wood forest products
oak
oak gall−nuts
tannins
Opis:
Oak gall−nuts are pathological excrescences on the leaves of oaks (in Poland: Quercus robur L. and Q. petraea Liebl.) created by the Cynips quercusfolii L. The potential medical use of these non−wood forest products should be taken under consideration because of widespread use in folk medicine, but also because of the presence of gall−nuts of Middle Eastern oak species Quercus infectoria in the current Farmakopea… [2017]. The aim of this study was the preliminary analyzes of Quercus robur L. galls in the context of the diversity of the raw material and its possible consequences for the variability in tannin content, and therefore for the therapeutic value. The galls were collected in September 2018 from five living trees forming compact mid−field tree plantation in Podkarpackie Region (SE Poland). To determine the tannin content, hide powder method was used, while mass spectrometry was used for determining the identity of the raw material. The tannin content was found to be between 10.02 ±0.2% and 15.47 ±0.07%. There were no statistical differences between the tannin content of four weight groups of tested gall−nuts. The analysis of mass spectra showed the presence of gallic acid and tannin disintegration products. The results indicate that the tannin content in domestic oak galls is lower than in Quercus infectoria ones, for which less than 20% is required, however Polish galls are still the richest native tannin raw material. It was not proved that the content of tannins in oak galls was influenced by their size. A large variation in tannin content depending on the sample suggests that it might be possible to identify i.e. forest sites or climatic zones, where the obtained gall−nuts will be characterized by the high tannin content.
Źródło:
Sylwan; 2019, 163, 09; 746-753
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zespół grzybów rozkładających drewno sędziwych dębów i lip
Associations of wood?decaying fungi in ancient oak and lime trees
Autorzy:
Zarzyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/1023386.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
grzyby
drzewa pomnikowe
biodegradacja
drzewa stare
Quercus
lesnictwo
lipa
dab
Tilia
drzewa lesne
oak
lime
wood−decaying fungi
ancient trees
poland
Opis:
Oak and lime trees constitute nearly 2/3 of an overall number of trees considered as nature monuments in Poland. Being exposed to a number of agents their health condition often is poor. The wood−decaying fungi are the major age−limiting agents for trees. This paper presents the results of studies on the presence of various fungal species on 160 oak and lime trees. The author makes an attempt to define associations of fungi causing wood decay in ancient oak and lime trees in Poland.
Źródło:
Sylwan; 2004, 148, 04; 22-26
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zbiorowiska grzybów w rozkładającym się drewnie dębu i sosny
Communities of fungi in decomposed wood of oak and pine
Autorzy:
Kwaśna, H.
Mazur, A.
Łabędzki, A.
Kuźmiński, R.
Łakomy, P.
Powiązania:
https://bibliotekanauki.pl/articles/1294810.pdf
Data publikacji:
2016
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
fitopatologia lesna
dab
Quercus
sosna
Pinus
drewno martwe
rozklad drewna
grzyby
zbiorowiska grzybow
communities of fungi
oak
Scots pine
succession
wood decomposition
Opis:
The abundance and diversity of wood decomposing fungi were investigated by isolating and cultivating filamentous fungi from wood and by detection of fruit bodies of ascomycetous and basidiomycetous fungi. The objective was to study the impact of forest management on fungi in 100-year-old oak and 87-year-old Scots pine forests in Northern Poland. Fungi were found on coarse woody debris of decayed stumps and fallen logs, boughs and branches in each of the three (managed and unmanaged) examined stands. In total, 226 species of Oomycota and fungi were recorded. Oak wood was colonized by one species of Oomycota and 141 species of fungi including Zygomycota (19 species), Ascomycota (103 species) and Basidiomycota (19 species). Scots pine wood was also colonized by one species of Oomycota and 138 species of fungi including Zygomycota (19 species), Ascomycota (90 species) and Basidiomycota (29 species). In the first, second and third stages of decomposition, the oak wood was colonized by 101, 89 and 56 species of fungi respectively and pine wood was colonized by 82, 103 and 47 species respectively. Eighty three of the observed species (37%) occurred on both types of wood, while the other species displayed nutritional preferences. A decrease in the number of species with advancing decay indicates the necessity for a continuous supply of dead wood to the forest ecosystem. This supply would secure the continuity of fauna and flora and guarantee a stable forest development. The nutritional and ecological preferences of many fungal species furthermore indicate the necessity of supplying the forests with wood of different species. In commercially managed forests the results obtained here will aid in: (i) the development of strategies for effective dead wood management in the context of forest productivity and future wood stock growth, as well as (ii) finding a compromise between forest management requirements and environmental protection.
Źródło:
Leśne Prace Badawcze; 2016, 77, 3
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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