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Wyszukujesz frazę "Drozdowski, H." wg kryterium: Autor


Tytuł:
X-ray Analysis of Intermolecular Interactions in Liquid 2-chloronaphthalene at 353 K
Autorzy:
Drozdowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/2036984.pdf
Data publikacji:
2003-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.25.Em
Opis:
The aim of the study was to examine the structure of liquid 2-chloronaphthalene C$\text{}_{10}$H$\text{}_{7}$-Cl at 353 K by the X-ray diffraction method. Monochromatic radiation Mo K$\text{}_{α}$,λ= 0.71069Å was used to determine the scattered radiation intensity between S$\text{}_{min}$=4πsinθ$\text{}_{min}$/λ=0.430Å$\text{}^{-1}$ and S$\text{}_{max}$= 4π sinθ$\text{}_{max}$/λ=14.311Å$\text{}^{-1}$. The curves of reduced intensity were analysed by the reduction method of Blum and Narten. Experimental distribution of X-ray scattered intensity was compared with theoretical results predicted for a proposed model of 2-chloronaphthalene molecule. The differential radial distribution function 4π r$\text{}^{2}$Σ$\text{}_{j,k}^{n}$ K$\text{}_{j}$[ρ$\text{}_{k}$(r)-ρ$\text{}_{0}$] was calculated and some intra- and intermolecular distances in liquid 2-chloronaphthalene were determined. X-ray structural analysis was applied to determine the packing coefficient of 2-chloronaphthalene molecules at 353 K. The intermolecular distance Cl ··· Cl' was also determined as 7.90±0.15Å. A simple model of short-range arrangement of the molecules was proposed, which seems to be valid for other weakly polar monosubstituted naphthalene derivatives in the liquid phase.
Źródło:
Acta Physica Polonica A; 2003, 104, 5; 441-458
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray Analysis of Liquid 1-Methylnaphthalene Structure at 293 K
Autorzy:
Drozdowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/2014543.pdf
Data publikacji:
2000-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.25.Em
Opis:
The paper reports results of the X-ray diffraction structural studies of liquid 1-methylnaphthalene, C$\text{}_{10}$H$\text{}_{7}$-CH$\text{}_{3}$ at 293 K, using Mo K$\text{}_{α}$ radiation of the wavelength λ=0.71069 A. The interpretation of the results was carried out using the reduction method of Blum and Narten. Experimental distribution of X-ray scattered intensity was compared with theoretical results predicted for a proposed model of 1-methylnaphthalene molecule. The electron-density radial-distribution function was calculated and some intra- and intermolecular distances in liquid 1-methylnaphthalene were determined. The structural data obtainable by X-ray analysis for liquid 1-methylnaphthalene are discussed. X-ray structural analysis was applied to determine the packing coefficient of 1-methylnaphthalene molecules. The electron-density radial-distribution function 4πr$\text{}^{2}$ ∑$\text{}_{j,k}^{n}\overline{K}\text{}_{j}$[ρ$\text{}_{k}$(r) — ρ$\text{}_{0}$] was calculated and some intra- and intermolecular distances in liquid 1-methylnaphthalene were determined. The structural data obtainable by X-ray analysis for liquid 1-methylnaphthalene are discussed. X-ray structural analysis was applied to determine the packing coefficient of 1-methylnaphthalene molecules.
Źródło:
Acta Physica Polonica A; 2000, 98, 6; 691-703
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray Diffraction Studies of Liquid Methylcyclohexane $C_6H_{11}-CH_3$ Structure at 293 K
Autorzy:
Drozdowski, H.
Nowakowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1812249.pdf
Data publikacji:
2008-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.25.Em
Opis:
The structure of methylcyclohexane $C_6H_{11}-CH_3$ at 293 K was investigated using the X-ray diffraction method. An angular distribution of X-ray radiation scattered in liquid methylcyclohexane was measured. The observable range of scattering angles was 6°≤2Θ≤120°. Monochromatic radiation Mo K_αenabled determination of the scattered intensity between $S_\text{min}=0.92 Å^{-1}$ and $S_\text{max}=15.313 Å^{-1}$. The differential radial distribution function of electron density was calculated. The mean structural parameters of liquid methylcyclohexane (inter- and intramolecular distances, radii of coordination spheres, and packing coefficient) were determined and discussed. The most probable binary radial correlation of molecules in liquid methylcyclohexane was proposed. The approach proposed in this paper gives a good description of intermolecular interactions in liquids and is a useful X-ray method for their analysis. The paper presents the structure and molecular correlations in liquid methylcyclohexane determined for the first time by the X-ray diffraction method. The study of methylcyclohexane is a continuation of our studies of cyclohexane derivatives cyclohexylamine and 2-methylcyclohexane. The aim of the study was to establish a relation between the cis and trans isomers and the conformation of the cyclohexane derivatives in the liquid phase.
Źródło:
Acta Physica Polonica A; 2008, 114, 2; 383-389
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular Correlations in Liquid mono- and Dlichloroalkanes
Autorzy:
Bochyński, Z.
Drozdowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/1945392.pdf
Data publikacji:
1996-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.25.Em
Opis:
This paper reports results of the X-ray diffraction structural studies of a series of liquid monochloroalkanes (chlorohexane, chlorooctane, chlorodecane, chlorododecane) and dichloroalkanes (1, 6-dichlorohexane, 1, 8-dichlorooctane, 1, 10-dichlorodecane, 1, 12-dichlorododecane) performed at 20 and 40°C. From the X-ray diffraction patterns, obtained using Mo K$\text{}_{α}$ radiation of the wavelength λ = 0.7107 Å, the mean angular distributions of intensities were determined. Then, the functions of radial distributions of electron density were numerically found using Fourier analysis. The mean structural parameters of the studied liquids (the inter- and intramolecular distances, the radii of coordination spheres, the coordination numbers) and the local arrangement of their molecules were established. The intermolecular arrangements in the studied liquid mono- and dichloroalkanes were found to be similar. Correlations were found between certain physical and chemical properties of the studied compounds and the spatial arrangement of their molecules.
Źródło:
Acta Physica Polonica A; 1996, 89, 4; 547-554
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ przygotowania gleby na zagęszczenie, wzrost i jakość samosiewów sosny w warunkach podokapowych
The effect of soil preparation on density, growth and quality of natural regeneration of pine under the canopy
Autorzy:
Andrzejczyk, T.
Drozdowski, S.
Szeligowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/1026387.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany sosnowe
wzrost roslin
samosiewy
hodowla lasu
przygotowanie gleby
lesnictwo
odnowienia naturalne
odnowienia podokapowe
scots pine
natural regeneration
soil preparation
Opis:
The studies were conducted in the years of 1997−2001. The effect of four methods of soil preparation (ploughing with double mouldboard plough LPZ−75, disc plough PTL−2, disc harrowing and ridge formation) on natural regeneration of pine under the canopy shelter was analysed. Significant differences in the density, height and vitality of seedlings in the variant II (ploughing with disc plough) and variant IV (ridge formation) were found in the second and third year of studies. In the following years the differences between the variants were insignificant due to the heavy damage of seedlings caused by the cockchafer larvae. Neither of the methods applied protected the seedlings against this damage.
Źródło:
Sylwan; 2003, 147, 03; 19-27
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ mechanicznego przygotowania gleby na zrębie na jej cechy
Effect of mechanical site preparation on features of the soil in a clear-cut area
Autorzy:
Aleksandrowicz-Trzcińska, M.
Drozdowski, S.
Żybura, H.
Powiązania:
https://bibliotekanauki.pl/articles/986611.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
zreby
przygotowanie gleby
zabiegi mechaniczne
maszyny lesne
plug LPZ
plug aktywny jednotalerzowy
frez lesny
gleby lesne
wlasciwosci fizyczne
wlasciwosci chemiczne
forest plough
active plough
forest mill
soil scarification
clear−cut
Opis:
In most cases, mechanical site preparation (MSP) is a precondition if high−quality (natural or artificial) regeneration of forests is to be achieved. However, the measures involved here may differ in terms of the level of intervention of the soil environment, at both the surface and deeper down. The choice of MSP methods should be based on climatic conditions, site type and the species whose renewal is sought, while the effect should improve conditions for the emergence and growth of the young generation of trees, with the influence on the soil environment being limited as far as possible. The research sought to compare physical and chemical features of the soils of the microhabitats created in clear−cut areas as a result of MSP using either an LPz double mould−board forest plough (furrow and ridge), an active plough (furrow and ridge) and a forest mill (belt and beyond the belt) as compared with unscarified soil. Investigated physical features included grain size (content of sand, silt and clay), bulk density and actual moisture, while the chemical ones: pHH2O and pHKCl, exchangeable acidity, total content of N and C and the C/N ratio, P2O5 content and base cations Mg2+, Ca2+, K+ and Na+. The most invasive MSP method for the soil environment is the active plough, which leaves the ridge exposed to processes of the decomposition of organic matter (and the highest content of N, C, Mg2+, Ca2+ and K+). Equally, this method may pose the greatest threat of mineral components of the soil being leached, with impoverishment of the habitat ensuing. The forest mill in turn offers the least invasive MSP. Most of the physical and chemical features of soil (other than exchangeable acidity and pHH2O and pHKCl) both in the belt areas and beyond them differed little from the those characterising non−scarified soil. Also the analysed features determined for the furrows ploughed by the active or LPz ploughs or the belt prepared using the forest mill did not differ significantly.
Źródło:
Sylwan; 2018, 162, 08; 648-657
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ rodzaju podłoża, sterowanej mikoryzacji i aplikacji fungicydów w szkółce na wzrost dębu szypułkowego w uprawie
Effect of the substrate type, controlled mycorrhization and application of fungicides in the nursery on the growth of pedunculate oak in the plantation
Autorzy:
Aleksandrowicz-Trzcińska, M.
Żybura, H.
Drozdowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/992254.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
szkolki lesne
produkcja sadzonek
podloza uprawowe
mikoryzowanie sadzonek
ochrona roslin
fungicydy
Bayleton 25 WP
Falcon 460 EC
Nimrod 250 EC
Siarkol Extra 80 WP
sadzonki
dab szypulkowy
Quercus robur
uprawy lesne
wzrost roslin
fungicides
quercus robur
mycorrhization
plantation
seedling growth
powdery mildew
Opis:
The effect of the controlled mycorrhization with the fungus Hebeloma crustuliniforme, the application of fungicides (Bayleton 25 WP, Falcon 450 EC, Nimrod 250 EC and Siarkol Extra 80 WP) in the nursery and the use of two types of substrate (a mixture of sterilized Estonian peat with vermiculite and unsterilized Polish peat with perlite) on the growth, level of infestation by powdery mildew and form (single, multi−stem) of oak trees in the first four years after planting was analysed. The type of the substrate and controlled mycorrhization did not affect the growth of young trees. Oaks treated with Nimrod in the nursery were the tallest after outplanting, but grew slower compared to trees in other variants. The oaks protected with the triazole fungicides (Falcon and Bayleton) in the nursery showed higher level of infestation by powdery mildew in the plantation.
Źródło:
Sylwan; 2013, 157, 03; 187-196
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wysokość siedmioletnich odnowień dębowych na gniazdach w różnych warunkach siedliskowych
The height of seven-year-old oaks growing in gaps in different forest habitats
Autorzy:
Bolibok, L.
Andrzejczyk, T.
Drozdowski, S.
Szeligowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/45960.pdf
Data publikacji:
2011
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
hodowla lasu
rebnie gniazdowe
odnowienia lasu
drzewa lesne
dab szypulkowy
Quercus robur
wysokosc drzew
warunki siedliskowe
wielkosc gniazd
zyznosc siedliska
Źródło:
Leśne Prace Badawcze; 2011, 72, 2
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sposób powstawania, struktura i produkcyjność drzewostanów bukowo-modrzewiowych w Polsce
Polish beech-larch stands: their structure, productivity and processes of generation
Autorzy:
Andrzejczyk, T.
Bolibok, L.
Drozdowski, S.
Szeligowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/45706.pdf
Data publikacji:
2011
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
drzewostany mieszane
drzewostany dwupietrowe
drzewostany bukowo-modrzewiowe
zasobnosc drzewostanu
struktura drzewostanu
wiek drzew
buk zwyczajny
Fagus sylvatica
odnowienia lasu
Źródło:
Leśne Prace Badawcze; 2011, 72, 4
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Południkowa zmienność warunków radiacyjnych w obrębie gniazd na terenie Polski – wyniki modelowania
Latitudinal variability of the radiation microclimate in artificial forest gaps in Poland – the modelling perspective
Autorzy:
Bolibok, L.
Brach, M.
Drozdowski, S.
Szeligowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/46188.pdf
Data publikacji:
2016
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
rebnie gniazdowe
gniazda
warunki radiacyjne
promieniowanie sloneczne
natezenie promieniowania slonecznego
szerokosc geograficzna
zmiany warunkow radiacyjnych
modelowanie
Źródło:
Leśne Prace Badawcze; 2016, 77, 1
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wybranych cech jodły pospolitej (Abies alba Mill.) na powierzchni proweniencyjnej w Rogowie
Characteristics of silver fir (Abies alba Mill.) in a provenance trial in Rogow
Autorzy:
Szeligowski, H.
Bolibok, L.
Buraczyk, W.
Drozdowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/46281.pdf
Data publikacji:
2011
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
hodowla lasu
drzewa lesne
jodla pospolita
Abies alba
proweniencje
przezywalnosc
wzrost roslin
wysokosc drzew
piersnice drzew
zywotnosc drzew
wartosc hodowlana
Źródło:
Leśne Prace Badawcze; 2011, 72, 3
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wartość hodowlana polskich populacji sosny zwyczajnej na powierzchni doświadczalnej w Rogowie
Silvicultural value of Scots pine provenances from Poland on the experimental plot in Rogow
Autorzy:
Szeligowski, H.
Buraczyk, W.
Drozdowski, S.
Gawron, L.
Powiązania:
https://bibliotekanauki.pl/articles/973327.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
hodowla lasu
sosna zwyczajna
Pinus sylvestris
proweniencje
LZD Rogow
leśnictwo
wartość hodowlana
doświadczenia prowieniencyjne
scots pine
provenance variation
silvicultural value
yield
Opis:
The paper analyses the variability of selected adaptive, growth and morphological parameters of 16 Scots pine provenances from Poland. Their silvicultural value and usefulness under the growth conditions in Central Poland were assessed. The empirical part was carried out on the experimental plot established in spring 1966 in Lipce Reymontowskie Forest Range, Rogów Forest Experimental Station. In subsequent surveys, the following characteristics were determined for each tree: diameter at the breast height, height, height of crown base and diameter of branches. All trees were also classified into 4 quality classes related to the stem straightness. The following analyses were performed: survival rate, course of height growth and diameter increment over age, variation of volume at single trees and whole stands level, diameter of branches, stem straightness, selected genetics and silvicultural properties. The assessment of silvicultural values pointed out that the best provenances include Dłużek, Karsko, Bolewice and Rychtal. Local provenances from Rogów and Spała are classified as the weak ones. Therefore in local Scots pine stands there is a need to improve quality, stability and yield. Obtained results deepen an existing knowledge on variability of Scots pine stands and demonstrate possibilities for verification of seed regionalization principles in Poland.
Źródło:
Sylwan; 2015, 159, 12; 997-1007
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ sposobu przygotowania gleby na cechy odnowienia naturalnego sosny zwyczajnej (Pinus sylvestris L.) w Nadleśnictwie Spychowo
Effect of mechanical site preparation methods on characteristics of the natural regeneration of Scots pine (Pinus sylvestris L.) in Spychowo Forest District
Autorzy:
Aleksandrowicz-Trzcińska, M.
Drozdowski, S.
Ligocki, M.
Żybura, H.
Powiązania:
https://bibliotekanauki.pl/articles/987039.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
Nadlesnictwo Spychowo
odnowienia naturalne
przygotowanie gleby
sosna zwyczajna
Pinus sylvestris
siewki
zageszczenie roslin
przezywalnosc
wzrost roslin
soil scarification
self−sowing
seedling density
seedling growth
clear−cut
Opis:
Mechanical site preparation is recommended to create optimum conditions for seed germination and seedling growth in a clear−cut area. Lack of soil scarification or less−intense methods may be more suitable from an environmental point of view, but can result in a failure to obtain natural regeneration. This study compared the effects of three mechanical site preparation methods (SPM) characterized by different levels of soil scarification (i.e. double mould−board forest plough (LPz), active plough (PA) or forest mill (FL)), as well as a control variant without mechanical site preparation, on height, density, spatial distribution and survival among naturally regenerating Scots pines (Pinus sylvestris L.) in the first 2 years of growth in a clear−cut area of NE Poland. The experiment was based around a four−block randomized block design involving the four variants. Seedling height was measured at the end of the first and second growing seasons, with measurements performed on 8 meter−wide transects extending across the entire width of the cleat−cut. We found no effect of SPM on seedling height, though the density of seedlings regenerating naturally was found to be dependent. After two years, the highest density was achieved in the PA variant (8.1 seedlings/m2) and the FL variant (7.0 seedlings/m2). A significantly lower density characterized the LPz variant (5.1 seedlings/m2) and the lowest of all the variant without soil scarification (3.2 seedlings/m2). The most homogeneous natural regeneration was achieved following the use of PA (2.6% of 1 m2 plots without seedlings after two growing seasons), while the least homogeneous was the variant without soil scarification (22.4% of 1 m2 plots). Survival of pines after the second growing seasons was quite high (over 80%), and did not differ significantly depending on the SPM. Our research therefore confirmed that, in the absence of mechanical site preparation, natural regeneration of sufficient density and homogeneity cannot be obtained. The best natural regeneration was obtained on sites prepared with PA, and FL scarification being only slightly less favorable. The low density and uneven distribution of seedlings on the soil prepared with LPz was a surprising result. The probable reason for this lay in the high precipitation in the first growing season. On one hand, this provided very good moisture conditions for seed germination and seedling growth on a substrate with high porosity in the PA and FL variants, but on the other the high bulk density of mineral soil in the LPz variant led to oxygen deficit.
Źródło:
Sylwan; 2017, 161, 03; 196-207
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wilgotności i gatunku gleby na wzrost mikoryzowanych sadzonek sosny zwyczajnej (Pinus sylvestris L.)
Effect of soil moisture and soil type on the growth of mycorrhizal seedlings of Scots pine (Pinus sylvestris L.)
Autorzy:
Buraczyk, W.
Szeligowski, H.
Drozdowski, S.
Aleksandrowicz-Trzcinska, M.
Powiązania:
https://bibliotekanauki.pl/articles/46371.pdf
Data publikacji:
2012
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
szkolkarstwo lesne
mikoryzowanie sadzonek
grzyby mikoryzowe
Hebeloma crustuliniforme
sosna zwyczajna
Pinus sylvestris
sadzonki mikoryzowane
wzrost roslin
doswiadczenia wazonowe
podloza uprawowe
piasek
pyly
wilgotnosc podloza
zyznosc gleb
Źródło:
Leśne Prace Badawcze; 2012, 73, 1
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł

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