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Tytuł:
Growth of Heterobasidion annosum (Fr.) Bref. through bark of one-year-old Pinus sylvestris seedlings grown in vitro
Autorzy:
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/41412.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Heterobasidion annosum
root rot fungi
pathogen
root infection
Pinus sylvestris
bark
seedling
growth
in vitro
host reaction
Opis:
Pinus sylvestris L. seedlings grown for 12-17 months in pure culture after inoculation with S and P strains of Heterobasidion annosum (Fr.) Bref. were studied with the help of light and transmission electron microscopy. Standardized inoculation procedure and uniform in vitro conditions allowed evaluation of the host/pathogen interactions. Necrotic reaction of the bark cells associated with the accumulation of dark-stained material in vacuoles, and lignification of their walls in root regions in proximity to mycelium were the common host reaction. Hypertrophy of the bark cells in areas invaded by hyphae caused a tension that was responsible for strong deformation of the bark cells. Injury to the vascular cambium resulted in formation of barrier zone parenchyma and abnormal xylem elements. High amount of polyphenolic material accumulated in new formed parenchyma cells was an effective chemical “barrier” to the centripetal spread of hyphae. Resin-plugged tracheids and row parenchyma cells rich in polyphenolic material were common in wood areas colonized by the fungus.
Źródło:
Dendrobiology; 2001, 46
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring the accuracy of producing free-form surfaces with the use of the coordinate measuring method
Autorzy:
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/386542.pdf
Data publikacji:
2010
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
produkcja
CAD
CNC
powłoka
model 3D
production
surface
3D modeling
Opis:
The present paper presents a method of determining errors in processing complex-shape surfaces produced with the use of a CNC machine tool. In order to achieve this, the whole process of making a three-dimensional object was performed, from creating a CAD model to generating a processing programme for a CNC machine tool and producing the actual object. The obtained surface was measured with a Brown & Sharpe Mistral coordinate measuring machine with the use of a Renishaw TP200 measuring probe.
Źródło:
Acta Mechanica et Automatica; 2010, 4, 4; 99-101
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coordinate measurements of free-form surfaces in reverse engineering process
Autorzy:
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/386544.pdf
Data publikacji:
2010
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
CAD
powłoka
pomiar
model 3D
surface
measurement
3D modeling
Opis:
This paper presents the issues of coordinate measurements of three-dimensional objects whose shape is defined with the use of parametric surface description methods applied in CAD systems. The paper also describes a mathematical as well as a geometrical presentation of surfaces used CAD systems, and discusses coordinate measurement techniques applied in measuring objects of this class. Further in the article, a practical implementation of the methodology of reconstruct- ing objects described with the use of free-form surface patches has been presented. The methodology includes subsequent object measurements and reconstructing the object’s geometric model, and concentrates on the possibly most accurate reconstruction of the shapes and dimensions of the researched object.
Źródło:
Acta Mechanica et Automatica; 2010, 4, 4; 102-105
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Host specialization of IS-group isolates of Heterobasidion annosum to Scots pine, Norway spruce and common fir in field inoculation experiments
Autorzy:
Werner, A
Lakomy, P.
Powiązania:
https://bibliotekanauki.pl/articles/41469.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
sapwood
Norway spruce
Scotch pine
host preference
Heterobasidion annosum
host tree
wounding method
vertical spread
intersterile group
common fir
host
Opis:
Two field inoculation experiments were conducted to study intraspecific variation in vertical spread of the P-, S- andF-IS-group isolates of Heterobasidion annosum in stems of Pinus sylvestris, Picea abies and Abies alba. Host-plants were inoculated with four isolates of each IS group after 10 mm long wounds made with a sterile knife (experiment 1) or 3 mm diameter radial holes made with a drill (experiment 2). On pine, the P-group isolates were more virulent than S andF isolates in terms of infection frequency, mortality rate andvertical spread in sapwood. The S isolates had higher incidence of infection and extensive growth on spruce than on pine. The F isolates were significantly less virulent on pine andspruce than on fir. Vertical spreadof all IS groups on fir was similar. In spite of between-strain-within-IS group variation in vertical spreadon each host, the study provided strong evidence for the occurrence of intraspecific differences in the host preference. In the interspecific analysis with three hosts, the isolates, IS groups andhost × strain andhost × IS group interactions accountedfor most of the explainedvariation, while host-plants accountedfor the smallest portion of the variance.
Źródło:
Dendrobiology; 2002, 47
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction between microfungi from arable and fallow land soils and Heterobasidion annosum in vitro
Autorzy:
Werner, A
Zadworny, M.
Powiązania:
https://bibliotekanauki.pl/articles/41051.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
microfungi
arable land
arable soil
Heterobasidion annosum
soil fungi
growth measurement
fallow
in vitro
Opis:
Interactions between members of microfungal communities of three arable and two fallow land soils and three P strains of Heterobasidion annosum were investigated in vitro. The effect of soil fungi on the pathogen was evaluated with two methods. In the first, the mycelial growth of H. annosum strains was measured and the experimental data were analysed using statistics. In the second, the biotic series method was used. The differences between the effects of soil fungi dominating in arable and fallow land soils were statistically significant. The microfungal communities of fallow land soils inhibited the growth of the pathogen more than those inhabiting arable soils. Evaluation of suppressive effect of the soil fungi on the pathogen with biotic series method showed also far more negative influence of microfungal communities of fallow land soils on the growth of H. annosum strains. Considering the positive effect of chemical and biological properties of the fallow land soils on the growth of Scots pine and highly suppressive effect of microfungal communities of these soils on the growth of H. annosum observed in the presented study, it may be concluded that arable soils left barren for many years are more beneficial for establishing of Scots pine plantations than cultivated soils.
Źródło:
Dendrobiology; 2002, 47
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation tests of the method for determining a CAD model of free-form surface deterministic deviations
Autorzy:
Poniatowska, M.
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/221700.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coordinate measurement
geometric deviation
free-form surface
regression analysis
CAD model
Opis:
Geometric deviations of free-form surfaces are attributed to many phenomena that occur during machining, both systematic (deterministic) and random in character. Measurements of free-form surfaces are performed with the use of numerically controlled CMMs on the basis of a CAD model, which results in obtaining coordinates of discrete measurement points. The spatial coordinates assigned at each measurement point include both a deterministic component and a random component at different proportions. The deterministic component of deviations is in fact the systematic component of processing errors, which is repetitive in nature. A CAD representation of deterministic geometric deviations might constitute the basis for completing a number of tasks connected with measurement and processing of free-form surfaces. The paper presents the results of testing a methodology of determining CAD models by estimating deterministic geometric deviations. The research was performed on simulated deviations superimposed on the CAD model of a nominal surface. Regression analysis, an iterative procedure, spatial statistics methods, and NURBS modelling were used for establishing the model.
Źródło:
Metrology and Measurement Systems; 2012, 19, 1; 151-158
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antagonism of higher fungi to Heterobasidion annosum (Fr.) Bref. in laboratory conditions
Badania nad antagonizmem pomiędzy grzybami mikoryzowymi a grzybem Heterobasidion annosum (Fr.) Bref. w warunkach in vitro
Autorzy:
Napierala-Filipiak, A.
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/41433.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Heterobasidion annosum
antagonism
mycorrhizal fungi
higher fungi
fungi
laboratory condition
Opis:
Interactions between 42 higher fungi and six strains of Heterobasidion annosum (Fr.) Bref., representing P and S intersterility groups were studied in vitro. Part of the higher fungi was represented by strains of ectomycorrhizal fungi indigenous to old disease centres caused by H. annosum in pine stands. Variation in antagonism to the pathogen was observed both within and between the species. The antagonism was dependent on growth rates of fungi in control. Fungi growing faster displayed a greater ability to arrest the development of the pathogen mycelia. The same tendency was observed in the strains of H. annosum, which generally grew faster and their growth was restricted less than that of higher fungi. Two strains of an ectedomycorrhizal fungus Mrg X, accompanied by a helper bacteria reduced mycelial extension of H. annosum by 72% and 76%. Among ectomycorrhizal fungi, the most effective antagonists were strains of Xerocomus subtomentosus, Amanita muscaria, A. citrina and Laccaria laccata. Three various types of interaction between the studied fungi were observed. Inhibition zone between interacting mycelia appeared often, however the fungi displayed this antagonistic property not to all strains of the pathogen. Although mycelia of H. annosum invaded colonies of the other fungi frequently, in none of the treatments growth of the higher fungus over the opposing colony of the pathogen was observed.
W warunkach in vitro przebadano wpływ czterdziestu dwóch szczepów grzybów wyższych naogra niczanie wzrostu sześciu szczepów Heterobasidion annosum należących do dwóch intersterylnych grup P i S. Badania prowadzono według metody opisanej przez Marxa (1969). Grzyby hodowano w szalkach Petriego, na pożywce Pp (Pachlewski 1983). Po dwóch tygodniach mierzono powierzchnię kolonii obu grzybów (w cm2), strefę inhibicji (w mm) oraz opisano sytuację zaistniałą na szalce. Badane grzyby wyższe wykazywały znaczne zróżnicowanie stopnia ograniczania wzrostu grzyba H. annosum. Najlepszymi antagonistami w stosunku do sześciu badanych szczepów patogena okazały się szczepy grzyba ektendomikoryzowego oznaczonego symbolem Mrg X (18–1z i 19–1z), których grzybnie wykazywały obecność bakterii, szczep grzybaektomikoryzowego z gatunku Amanita muscaria (16–3), szczep grzybaniemikoryzowego Hygrophoropsis aurantiaca (55–1) oraz grzyba Phallus impudicus (26–1) nie tworzącego z sosną symbiozy. Obok zmienności międzygatunkowej stwierdzono dużą zmienność wewnątrzgatunkową. Różnice pomiędzy szczepami z gatunków: A. muscaria, Suillus luteus, Paxillus involutus czy H. aurantiaca były niekiedy bardziej znaczące niż pomiędzy gatunkami. Badane grzyby mikoryzowe cechowały się stosunkowo wolnym wzrostem na pożywce, natomiast większość badanych szczepów H. annosum wzrastała szybko. Stwierdzono zależność pomiędzy szybkością wzrostu a stopniem negatywnego oddziaływanianawzrost grzybów w bikulturach. Szczepy grzybów wyższych charakteryzujące się szybszym wzrostem przejawiały większą zdolność hamowania wzrostu szczepów grzyba H. annosum i jednocześnie wykazywały większą tolerancję na obecność patogena.
Źródło:
Dendrobiology; 2000, 45
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tolerance of intersterility group isolates of Heterobasidion annosum to low pH and aluminium on solid medium
Autorzy:
Majewska, B
Werner, A.
Lakomy, P.
Powiązania:
https://bibliotekanauki.pl/articles/40967.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
plant pathogenic fungi
pathogenic fungi
root rot
Heterobasidion annosum
low pH
aluminium
tolerance
plant root
Opis:
Tolerance of several strains of the P-, S-, and F- intersterility groups of Heterobasidion annosum to low pH and high concentration of aluminium ions was studied on malt extract agar. There were marked intraspecific, but not intergroup, variations in tolerance to both factors. Some strains were relatively tolerant or sensitive to low pH and aluminium, while the others were tolerant to low pH but sensitive to Al. There was no relationship between tolerance of the strains to low pH and their tolerance to aluminium stress.
Źródło:
Dendrobiology; 2004, 51; 37-41
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Machining Error Compensation for Objects Bounded by Curvilinear Surfaces
Autorzy:
Czerech, Ł.
Kaczyński, R.
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/387059.pdf
Data publikacji:
2012
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
CNC
CAD
CAM
współrzędnościowa maszyna pomiarowa
NURBS
CNC machines
coordinate measuring machine
Opis:
The paper is devoted to topic related with machining error correction for objects bounded by curvilinear surfaces manufactured on numerically controlled milling machine. Currently it is realized by two techniques. The first of them is called on-line and requires continuous correction of toolpath during the machining process. This approach requires expanded adaptive control systems. The second method called off-line is based on correction of machining control system outside the machine (on the basis of control measurement results). This paper shows methodology of machining shape error correction with off-line technique (with no constant and direct connection to CNC machine tool). This method is based on usage of CAD/CAM systems, numerically controlled milling machine and coordinate measuring machine. Manner of procedure proposed in this paper was verified on the example of ruled surface profile described with NURBS technique. Realization of this proposed methodology of machining error correction has shown significant accuracy correction of manufactured element.
Źródło:
Acta Mechanica et Automatica; 2012, 6, 1; 26-30
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic diversity of Heterobasidion spp. in Scots pine, Norway spruce and European silver fir stands
Zróżnicowanie genetyczne grzybów rodzaju Heterobasidion w drzewostanach: sosnowym, świerkowym i jodłowym
Autorzy:
Lakomy, P.
Broda, Z.
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/66981.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
Investigations of genetic diversity of Heterobasidion spp. in Scots pine, norway spruce and european silver fir stands indicated that almost all of identified genets occurred in those stands were small occupied only a single stump. in some cases two, three or even four genets could effectively exist in an individual stump. genetic similarity of H. annosum s.s. genets varied from 0% to 62%, H. parviporum from 0% to 38% and H. abietinum from 0% to 55%. the oldest and biggest genet was found in laying fir log and overgrew the wood for at least 14 years. this genet belonged to H. abietinum. the size of genets was related to thinning operation, spore dispersal, age of stand or competition in wood colonization.
Badania nad zróżnicowaniem genetycznym gatunków rodzaju Heterobasidion w drzewostanach sosnowym, świerkowym i jodłowym wskazały, że niemalże wszystkie genotypy wystę-pujące w badanych drzewostanach były małe i zasiedlały co najwyżej jeden pniak. wkilku przypadkach stwierdzono występowanie dwóch, trzech, a nawet czterech genotypów w jednym pniaku. Podobieństwo genetyczne genotypów H. annosum s. s. wynosiło od 0% do 62%, H. parviporum od 0% do 38%, a H. abietinum od 0% do 55%. najstarszy i największy genotyp stwierdzono w leżącej kłodzie jodłowej, której drewno przerastał, przez co najmniej 14 lat. ten genotyp należał do H. abietinum. rozmiar genotypów był związany z intensywnością cięć pielęgnacyjnych w drzewostanach, rozprzestrzenianiem zarodników, wiekiem drzewostanów oraz konkurencją w zasiedlaniu drewna pomiędzy genotypami.
Źródło:
Acta Mycologica; 2007, 42, 2
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of cryptosporidiosis in livestock in Wielkopolska Region
Autorzy:
Majewska, A.C.
Werner, A.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/840450.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
prevalence
cryptosporidiosis
Polska
economic loss
cryptosporidial infection
farm animal
Cryptosporidium
Wielkopolska region
livestock
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of different techniques in the diagnosis of cryptosporidiosis in human and animals
Autorzy:
Werner, A.
Majewska, A.C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/840659.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
cryptosporidiosis
man
diagnosis
animal
Cryptosporidium
oocyst
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neighbourhood coefficients of cellular automata for research on land use changes with map algebra
Autorzy:
Werner, Piotr A.
Powiązania:
https://bibliotekanauki.pl/articles/2035797.pdf
Data publikacji:
2012-11-10
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Spatio-temporal modelling
land use
cellular automata
map algebra
neighbourhood coefficients
Opis:
The dependency of land use and the neighbouring land cover patches is related to the existing neighbourhood or the predominant land use types in a given region, which stimulates further land changes of the lot being observed. Land use changes can be considered a complex and (to an extent) random process. The complexity of interactions means that the conventional deductive models are constrained, particularly in the case of the spatio-temporal phenomena, and implies the application of cellular automata to spatial research. Cellular automata are similar to the map algebra models in GIS. The concept of using neighbourhood coefficients in the analysis of land use changes is based on the combination of map algebra with two-dimensional cellular automata. The aims of this research included formulating the theoretical structure of neighbourhood coefficients, analysing their operationalization and testing their practical application. The verification of research and procedures included maps and statistics of simulations of land use changes in Poland.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2012, 16, 1; 57-63
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of intestinal amoebae and flagellates in animals of the Zoological Garden in Poznan
Autorzy:
Majewska, A.C.
Kasprzak, W.
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/837562.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
flagellate
prevalence
Poznan Zoological Garden
zoological garden
Polska
intestinal amoeba
amoeba
animal
parasitic infection
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of intestinal amoebae in livestock
Autorzy:
Majewska, A.C.
Werner, A.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/838666.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
Entamoeba polecki
prevalence
Lodamoeba butschlii
intestinal amoeba
amoeba
epidemiology
livestock
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł

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