Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 38

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Wpływ grubości drzew na wartości wybranych parametrów i wskaźników struktury włókien drewna brzozy brodawkowatej (Betula pendula Roth.)

100%
Lachowicz H.
Przegląd Papierniczy
|
2011
|
tom 67
|
nr 05
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Struktura wlokien drewna brzozy brodawkowatej [Betula pendula Roth.] w polnocno-wschodniej Polsce

100%
Lachowicz H.
Leśne Prace Badawcze
|
2010
|
tom 71
|
nr 1
39-50
3

Tensile strength parallel to the grain of silver birch wood in north-eastern Poland

100%
Lachowicz H.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2008
|
tom 64
4

Na wagę złota. Rośliny zapachowe w Biblii – kadzidła i wonności

100%
Lachowicz H.
Las Polski
|
2011
|
nr 01
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wybrane wskazniki jakosci technicznej drewna brzozy brodawkowatej [Betula pendula Roth.] w polnocno-wschodniej Polsce

100%
Lachowicz H.
Leśne Prace Badawcze
|
2010
|
tom 71
|
nr 2
135-147
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wpływ grubości drzew na wybrane właściwości strukturalne i fizyko-mechaniczne drewna brzozy brodawkowatej (Betula pendula Roth.)

100%
Lachowicz H.
Sylwan
|
2011
|
tom 155
|
nr 09
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wieloczynnikowa analiza zmienności gęstości drewna brzozy brodawkowatej (Betula pendula Roth.)

100%
Lachowicz H.
Sylwan
|
2012
|
tom 156
|
nr 06
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wpływ położenia i wieku drzew na wartości współczynników jakości wytrzymałościowej drewna brzozy brodawkowatej (Betula pendula Roth.)

100%
Lachowicz H.
Sylwan
|
2011
|
tom 155
|
nr 08
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Analiza uwarunkowan prawnych uzytkowania lasu w Polsce

75%
Lachowicz H.
Sylwan
|
2001
|
tom 145
|
nr 12
59-74
10
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Drewno w budownictwie oraz przedmiotach życia codziennego na terenie Kielecczyzny od końca XVII do początku XX wieku

63%
Konofalska E., Lachowicz H.
Sylwan
|
2018
|
tom 162
|
nr 08
The aim of the study was to research which wood species were used to make constructions and everyday objects in the Świętokrzyski, Rural Town, and Manor sectors of the Ethnographic Park (an open−air museum) in Tokarnia (central Poland). The objects on display are in the natural village environment. Apart from the traditional architecture there are also permanent exhibitions of furnishings belonging to people of different social classes. In all investigated sectors we found thirty five items. Wood species were determined using the macroscopic method. The Ethnographic Park archives contain residual information about wood species. Larch was the most commonly used wood species in the whole area. Other species used in the architecture include oak, pine and fir. Chairs and beds were made from pine and oak. For upright furniture, oak and less often pine were used. The other wood species used in this kind of furniture were larch, ash, beech and walnut. Kitchen utensils were mostly made from pine, poplar, birch, beech and oak. School utensils were made from beech, birch and pine. Oak, beech and birch were used in others items. Wood species used in construction and the production of everyday objects in the Kielce region from the end of the 17 th century to the beginning of the 20 th century. Localization and investigation into others traditional objects in świętokrzyskie voivodeship should be further discussed in the next study. Moreover, maps of tree stands from the end of the 17th century to the beginning of the 20 th century should be analysed. Consideration of these aspects may help find the reason why larch was the most popular wood species in the Ethnographic Park in Tokarnia.
11
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Drewniane chordofony w polskich zbiorach archeologicznych

63%
Poplawska D., Lachowicz H.
Sylwan
|
2017
|
tom 161
|
nr 08
The article describes eight wooden string instruments found during archaeological excavations in Poland. The instruments are currently housed in Polish museums and research institutes and are a part of the national heritage. They date back to the period between the end of the 10th century and the first half of the 16th century. The instruments originating from the Middle Ages and early Renaissance reflect a high wood culture in Poland in the early centuries of its history. These archaeological collections include four different types of string instruments: lyres, vielles (fiddles), rebecs, and lutes. Individual parts of all the instruments were subjected to detailed measurements including the total length, width and thickness of the body, the total length, width and thickness of the soundboard and the wall height. The type of wood used for their construction was also determined and included: Norway spruce (Picea abies) – the older lyre from Opole and the soundboards of the gittern from Elbląg, lime (Tilia sp.) – the younger lyre from Opole and the lyre from Gdańsk, aspen (Alnus sp.) – the bodies of the vielles from Elbląg and Płock and the body of the gittern from Elbląg, European beech (Fagus sylvatica) – the peg board of the hypothetical rebec from Ostrów Lednicki, as well as Scots pine (Pinus sylvestris) – the soundboards of the vielles from Płock and of the supposed nyckelharp from Wolin. The soundboards of the vielles from Elbląg was made of alder or poplar, while the pegs and bridges – of maple (Acer sp.), birch (Betula sp.) and oak (Quercus sp.). The body of the instruments: the soundbox with the neck and with a peg board or pegbox was usually made of one piece of wood and covered with a separate soundboard made of different or the same type of wood as the body. However, the soundboards are found less often than the instrument bodies because the plates with a few−millimetre thickness are more prone to decay.
12

Analiza zmienności gęstości umownej drewna sosny zwyczajnej (Pinus sylvestris L.) wzdłuż wysokości pnia w zależności od wybranych czynników

63%
Witkowska J., Lachowicz H.
Przegląd Papierniczy
|
2012
|
tom 68
|
nr 09
13
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Zmienność gęstości umownej drewna sosny zwyczajnej (Pinus sylvestris L.) w zależności od wybranych czynników

63%
Witkowska J., Lachowicz H.
Sylwan
|
2013
|
tom 157
|
nr 05
Paper presents analysis of differences in conventional wood density of Scots pine measured at breast height regarding the geographical location of stands, forest habitat type, stand age and associated parameters such as density in the mid−length of the stem, density in the upper end of the stem and diameter at breast height. To investigate the impact of these factors, an analysis of covariance was used in accordance with two models specifically developed for this purpose. We found dependence of conventional wood density on the type of forest habitat and geographical location of the stand. The highest density was detected in dry coniferous forests, while the smallest in fresh mixed coniferous forests. Scots pine wood from Zielona Góra Forest (western Poland) characterised with the highest density, while from the Knyszyn Primeval Forest (eastern Poland)− with the lowest.
14
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Charakterystyka jakości technicznej drewna paulowni COTE-2

63%
Lachowicz H., Giedrowicz A.
Sylwan
|
2020
|
tom 164
|
nr 05
Seedlings of Paulownia (Paulownia sp.) has increasingly appeared in the merchant offers in Poland. However, the knowledge of the technical characteristics of its wood is still insufficient because comprehensive studies of wood properties for this species have not been performed. The main aim of this study was to determine the selected physical and mechanical properties of Paulownia COTE−2 wood. The wood comes from the plantation of Paulownia COTE−2 located in Granada region in Spain. The investigation were carried on 162 samples, according to Polish standards. We analysed the following physical properties: air−dry density, oven−dry density, basic density, proportion of wood substance, wood porosity, total shrinkage of wood in longitudinal, tangential and radial anatomical directions, volumetric shrinkage, coefficients of each of mentioned shrinkage, the anisotropy index of shrinkage and mechanical properties: compression strength, static bending, modulus of elasticity in static bending, including the coefficients of the mechanical properties mentioned before. The results show that Paulownia wood is very light, with the density of 270 kg/m³ and low shrinking (volumetric shrinkage equaled to 7%). The mechanical properties of Paulownia wood are closely related to its density. Static bending equaled to 38 MPa and compression strength parallel to grain amounted to 24 MPa.
15
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Zmiany cen, ilości i wartości surowca drzewnego sprzedawanego w Lasach Państwowych

63%
Wysocka-Fijorek E., Lachowicz H.
Sylwan
|
2018
|
tom 162
|
nr 01
The State Forests in Poland operate according to the principles of sustainable forest management combining and fulfilling diverse functions. Wood production is one of them. In this context, the question arises whether the species composition of forest stands has a greater impact on timber sales than the optimization of the assortment structure of harvested timber. The aim of the paper is to present the dynamics of prices, volume and value of timber sold by the State Forests and to examine the impact of the price and volume on the value of timber sales. The analysis of the dynamics measures was based on the data in the financial reports published annually on the websites of the State Forests as well as on the announcements of the Central Statistical Office in Poland on the average price of timber, calculated from the average price of timber sold by forest districts in the first three quarters of the year. The aggregate indices were calculated using the data on the volume, prices and value of the sold timber included in the State Forests Information System. The data were obtained by dividing wood assortments and species into groups. The analysis focused on years 2012−2014. It included seven tree species: pine, spruce, fir, oak, beech, alder and birch as well as the most common groups of wood assortments: WA, WB, WC, WD, WBCK, WCK, S1, S2, S4, M1 and M2, for which the weighted average price of timber and the amount of timber sold were calculated in individual years. Of the analysed characteristics (price, volume, value), the average rate of changes in timber prices was the lowest and amounted to 1.9% per year. The volume of timber offered on the market increased by 3.01% annually. The cumulative effect of the increase in the price and volume of timber offered for sale was 5.94% of the annual value of timber sold.
16
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Impact of a fresh broadleaved forest site and fresh mixed broadleaved forest site on selected parameters and ratios of silver birch (Betula pendula Roth.) wood fibre structure

63%
Lachowicz H., Paschalis-Jakubowicz P.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
|
2014
|
tom 57
|
nr 193
The variability of selected ratios characterising the dimensions and shape of silver birch wood fibres was determined based on the site where the trees grow. Two sampling areas were selected, located in the Biała Podlaska Forest District in eastern Poland. Samples for testing were taken from trees approx. 45–50 years old, growing on a fresh broadleaved forest site and on a fresh mixed broadleaved forest site. On these two sites, silver birch occurs most widely as a dominant species, both in terms of stand area and volume, in Poland. A statistical analysis was performed of selected parameters of the wood fibre structure such as length, width, lumen and cell wall thickness, as well as of the wood fibre structure ratios belonging to the basic properties of fibrous pulp: the felting power, flexibility ratio, coefficient of rigidity, Runkel and Mühlsteph ratios, as well as the compactness index. It was demonstrated that the site from which birch material originates has a significant impact on the average values of: fibre length, lumen, flexibility ratio, and the coefficient of rigidity, as well as the Runkel and Mühlsteph ratios. However, analyses did not prove any major impact of the site on the average values of: fibre width and wall thickness, the felting power or the compactness index of silver birch wood.
17
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Drewniane flety proste z wykopalisk archeologicznych na terenie Europy

63%
Poplawska D., Lachowicz H.
Sylwan
|
2014
|
tom 158
|
nr 01
The article describes twelve recorders excavated from archaeological sites dating back to the Mediaeval times and the Renaissance. Three of them are in the museums in Germany, two in the Netherlands and one in Estonia. Six are in Polish museum collections. The flutes from five locations (Puck, Nysa, Płock, Toruń and Warsaw) are described in this paper for the first time. All the instruments from the Polish territory have been accurately measured and identified for the kind of wood from which they were made. All the flutes were made from one piece of wood of the following tree genera: lilac (Nysa, Płock), plum (Dordrecht, Göttingen), cherry (Würzburg), maple (Elblag, Toruń, Tartu), boxwood (Esslingen, Amsterdam) and spruce (Puck, Warsaw). The oldest known recorders were primarily made of fruit tree wood (Würzburg, Dordrecht, Göttingen). Interesting was the use of spruce wood (softwood) for making aerophones, absent in the later preserved instruments of this type.
18
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Zmienność wybranych wskaźników struktury włókien drewna brzozy brodawkowatej (Betula pendula Roth.) w północno-wschodniej Polsce

63%
Lachowicz H., Paschalis-Jakubowicz P.
Sylwan
|
2011
|
tom 155
|
nr 07
19
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Potencjalna ilość surowca drzewnego najwyższych klas jakości w Polsce

51%
Paschalis-Jakubowicz P., Kulik P., Lachowicz H.
Sylwan
|
2015
|
tom 159
|
nr 03
20
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wpływ siedliska na wybrane właściwości strukturalne i fizyko-mechaniczne drewna brzozy brodawkowatej (Betula pendula Roth.)

51%
Lachowicz H., Jednoralski G., Paschalis-Jakubowicz P.
Sylwan
|
2014
|
tom 158
|
nr 04
The aim of the research was to determine the habitat−related variation in the selected structural and physical− −mechanical properties of silver birch. Two sample plots were established in the territory of the Biała Podlaska Forest District in eastern Poland. Samples for measurement were taken from the plots with trees aged 45−50 years growing in the fresh deciduous (Lśw) and fresh mixed deciduous (LMśw) forest habitats. The following properties were subjected to statistical analysis: the average width of annual rings, wood density determined for the samples of 20×20×300 mm, 20×20×30 mm, and 30×2.66×0.1 mm in size (the last dimension parallel to grain), tensile strength parallel to grain, compression strength parallel to grain, static bending, modulus of elasticity in static bending and the coefficients of tensile strength parallel to grain, compression parallel to grain, static bending, and modulus of elasticity in static bending. The research confirmed a significant effect of the habitat on the mean values of birch wood density for all examined sample sizes, tensile strength parallel to grain, static bending and modulus of elasticity in static bending. No significant effect of the habitat on the mean values of annual ring width, tensile strength parallel to grain and the coefficients of tensile strength parallel to grain, compression strength parallel to grain, static bending and modulus of elasticity in static bending for birch wood samples was found.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.