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Tytuł:
Periodontal condition and periodontal risk assessment in adult patients with cystic fibrosis
Autorzy:
Pawlaczyk-Kamieńska, T.
Borysewicz-Lewicka, M.
Śniatała, R.
Powiązania:
https://bibliotekanauki.pl/articles/2085683.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
cystic fibrosis
periodontal diseases
periodontal condition
periodontal risk assessment
Opis:
Introduction. The presence of chronic inflammation in the mouth, such as infectious disease of the periodontal tissues, may be the reservoir of microorganisms that are not usually present, including Pseudomonas aeruginosa. Objective. The purpose of the study was to create a profile of periodontal conditions and periodontal risk assessment in adult patients with cystic fibrosis. Materials and method. The study involved 22 patients with cystic fibrosis (CF) aged 29.43 years. The following parameters were included in the clinical study: number and cause of permanent teeth loss (excluding third molars), the presence of plaque (PCR), bleeding on probing (BOP), probing pocket depth (PPD), clinical attachment level (CAL). On the basis of obtained clinical data, the periodontal status and the periodontal risk were determined. Results. The study showed healthy periodontal tissues in 9 people (41%), gingivitis in 5 (23%), and mild periodontitis in 8 (36.36%). The periodontal risk in the vast majority of patients (90.91%) was at a low level – only 2 people, on average. Conclusions. The poor oral hygiene in CF patients indicates the need to develop standards of dental care for this group aimed at education and elimination of risk factors for oral diseases. The obtained results of clinical trials do not rule out the likelihood of auto-infections of the respiratory system originating from periodontal tissues, which, in CF patients, may adversely affect the general state of health and conducted therapy.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 2; 235-239
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical activity, physical fitness and quality of life of the University of the Third Age students
Autorzy:
Pieczyńska, A.
Zasadzka, E.
Trzmiel, T.
Pawlaczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/2088289.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
physical activity
University of the Third Age
quality of life
elderly people
physical fitness
Opis:
Background: Physical activity (PA) has a positive effect on human health at all ages and it is especially important in older people. When insufficient, it may lead to the deterioration of a person’s health status. Aim of the study: The aim of the study was to assess the declared PA of the Universities of the Third Age (U3A) students and to examine the relationship between the level of PA, physical performance, and quality of life in this population. Material and methods: The study included 99 subjects, aged ≥60 years, with a Mini Mental State Examination score ≥24. Participants were examined using the International Physical Activity Questionnaire (IPAQ), the Short Form Health Survey (SF-36) questionnaire, the Short Physical Performance Battery (SPPB), the Activities of Daily Living scale (ADL), the Lawton Instrumental Activities of Daily Living scale (IADL), and the short form of the geriatric depression scale (GDS). Handgrip strength (HS) was measured using the baseline hydraulic dynamometer. Results: Statistically significant differences in the results of women and men were demonstrated in 5 variables: the level of PA measured with the IPAQ, physical component summary of the SF-36 questionnaire, the total SPPB score, HS of the dominant hand and the non-dominant hand. In all examinations, men obtained higher scores than women. Positive correlations between PA and the result of the ADL, IADL, SPPB, HS and physical component summary of the SF-36 questionnaire were shown. Conclusions: The study confirmed that the participants of the U3A classes mostly meet the recommendations regarding minimum PA and they willingly undertake regular PA. It translates into high functional and physical fitness, stronger muscles and a good QoL.
Źródło:
Medical Science Pulse; 2019, 13, 3; 10-15
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza parametrów fizykalnych dachów zielonych i ich złączy w świetle nowych wymagań cieplnych
Analysis of physical parameters of green roofs and their partition in light of current thermal requirements
Autorzy:
Pawlaczyk, M.
Pawłowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/2065418.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska
Tematy:
dachy zielone
budownictwo energooszczędne
nowoczesne materiały termoizolacyjne
green roof
low energy building
modern thermal insulation materials
Opis:
W pracy poruszono tematykę dachów zielonych z wykorzystaniem różnych materiałów termoizolacyjnych. Określono minimalne grubości materiałów termoizolacyjnych konieczne dla spełnienia nowych wymagań cieplnych i zaproponowano prawidłową konstrukcję wybranego złącza. Na podstawie przeprowadzonych obliczeń parametrów fizykalnych można stwierdzić, że zaprojektowanie przegrody dachowej z użyciem nowoczesnych materiałów spełniające wymagania prawne w zakresie budownictwa niskoenergetycznego po 2021 roku jest możliwe.
In this paper was raised up the subject of green roofs using different insulating materials. It was specified the minimum thickness of the insulating materials necessary to fulfillment the new thermal requirements and proposed some correct joints structure. On the basis of physical parameters calculations can be determined, that it is possible, to design a roof barrier with modern materials which meet legal requirements in the construction of low energy after 2021.
Źródło:
Budownictwo o Zoptymalizowanym Potencjale Energetycznym; 2017, 1 (19); 55--60
2299-8535
2544-963X
Pojawia się w:
Budownictwo o Zoptymalizowanym Potencjale Energetycznym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variation of silver fir progeny from Tisovik Reserve population determined via microsatellite and isozyme markers
Autorzy:
Pawlaczyk, E.M.
Baczkiewicz, A.
Buczkowska, K.
Bobowicz, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/38542.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2017, 59, 1
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hearing Status in Young People Using Portable Audio Players
Autorzy:
Pawlaczyk-Łuszczyńska, M.
Zaborowski, K.
Zamojska-Daniszewska, M.
Rutkowska-Kaczmarek, P.
Dudarewicz, A.
Śliwinska-Kowalska, M.
Powiązania:
https://bibliotekanauki.pl/articles/176501.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
portable audio players
PAPs
pure-tone audiometry
transient-evoked otoacoustic emissions
TEOAEs
hearing threshold levels
high-frequency notches
noise-induced hearing loss
Opis:
The aim of this study was to evaluate the hearing status in young adults using portable audio players (PAPs) in relation to their listening habits. The study included 58 subjects, aged 22.8±2.8 years, non-occupationally exposed to noise. Questionnaire inquiry aimed at collecting personal data, the information on PAPs usage habits, self-assessment of hearing status and identification of risk factors for noise-induced hearing loss (NIHL) were performed in study subjects. Hearing tests included pure-tone audiometry (PTA) and transient-evoked optoacoustic emission (TEOAE). All subjects were PAPs users. Depending on listening habits they were divided into the subgroups of “frequent” users (>1 h/day) and “non-frequent” users (≤1 h/day). There were no significant differences between subgroups in prevalence of NIHL risk factors and self-assessment of hearing status. However, frequent users more often complained of tinnitus and hyperacusis. Majority (81.9 %) of participants had normal hearing. Nevertheless, 6.9 % of audiograms showed high-frequency notches typical for NIHL. Both, the PTA and TEOAE indicated worse hearing in non-frequent users compared to frequent users. No significant differences in prevalence of high-frequency notches between subgroups were noted. The outcomes do not support some previous studies results that the excessive exposure to music listened through PAPs might result in accelerating of development of NIHL loss in young adults.
Źródło:
Archives of Acoustics; 2017, 42, 1; 113-120
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morfologiczne i anatomiczne zróżnicowanie populacji kosodrzewiny (Pinus mugo Turra) z polskich Tatr wyrażone w cechach igieł
Population differences in morphological and anatomical traits of Pinus mugo Turra needles from the Polish part of the Tatra Mountains
Autorzy:
Pawlaczyk, E.M.
Bączkiewicz, A.
Wawrzyniak, P.
Czołpińska, M.
Gonera, P.
Buczkowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/1293462.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
Tatry
sosna gorska
Pinus mugo
igly sosny
budowa anatomiczna
zmiennosc morfologiczna
czynniki siedliska
podloza
wysokosc nad poziomem morza
dwarf mountain pine
Tatra Mts.
variability
needle
altitude
substrate
Opis:
The main aim of this study was to describe the variation between the populations of the dwarf mountain pine Pinus mugo Turra based on the morphological and anatomical traits of their needles, and to investigate the relationship between the observed variation and environmental conditions (altitude and substrate).Two-year-old needles were collected from 180 individuals of six populations of P. mugo growing in the Tatra Mts. Two populations were classified as dense, located at 1360–1450 m altitude, and the remaining four formed loose clusters and were situated at 1500–1650 m altitude. Four of the populations are growing on granite and two on a limestone substrate. The natural variation of 10 morpho-anatomical and 3 synthetic needle traits was measured. In addition to descriptive statistics, the analyses of variance (ANOVA) with a Tukey test and principal component analysis were computed. We also estimated Pearson correlation coefficients for the examined needle traits and altitude as well as substrate. Our results indicate that the P. mugo populations differ significantly with regard to the investigated traits for which the Trzydniowiański Wierch population was the most distinct. The observed pattern of variability is largely caused by differences in stomatal traits and these features are positive correlated with altitude. Additionally, populations growing on granite have larger values for most of the examined traits compared to populations growing on limestone.
Źródło:
Leśne Prace Badawcze; 2017, 78, 1
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Hearing Threshold of Employees Exposed to Noise Generated by the Low-Frequency Ultrasonic Welding Devices
Autorzy:
Dudarewicz, A.
Zaborowski, K.
Rutkowska-Kaczmarek, P.
Zamojska-Daniszewska, M.
Śliwińska-Kowalska, M.
Zamysłowska-Szmytke, E.
Pawlaczyk-Łuszczyńska, M.
Powiązania:
https://bibliotekanauki.pl/articles/178077.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
noise-induced hearing loss
noise
ultrasonic noise
occupational exposure
Opis:
The aim of the study was to assess the hearing threshold levels (HTLs) in employees exposed to noise generated by low-frequency ultrasonic technological equipment in comparison with the HTLs of workers exposed to audible noise at the similar A-weighted equivalent-continuous sound pressure level. The study includes measurements of ultrasonic and audible noise at workplaces and hearing tests, i.e. conventional pure-tone audiometry and extended high-frequency audiometry. The study group comprised 90 workers, aged 41.4 ± 10.0 years (mean±SD), exposed for 17.3 ± 9.8 years to noise generated by ultrasonic devices at mean daily noise exposure level (‹LEX,8h›) of 80.6 ± 2.9 dB. The reference group consists of 156 subjects, exposed to industrial noise (without ultrasonic components) at similar A-weighted equivalent-continuous sound pressure level (‹LEX,8h› = 81.8 ± 2.7 dB), adjusted according to age (39.8 ± 7.7 years), gender and job seniority (14.0 ± 7.0 years). This group was selected from database collected in the Nofer Institute of Occupational Medicine. Audiometric hearing threshold levels in the frequency range of 0.5–6 kHz were similar in both groups, but in the frequency range of 8–12.5 kHz they were higher in the group of employees exposed to ultrasonic noise. The findings suggest that differences in the hearing threshold (at high frequencies) in analyzed groups may be due to differences in spectral composition of noise and show the need to continue the undertaken studies.
Źródło:
Archives of Acoustics; 2017, 42, 2; 199-205
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Torfowiska jako zbiorniki węgla - zamierzenie renaturyzacji torfowisk w Słowińskim Parku Narodowym
Peatlands as carbon sinks - peatlands restoration project in Slowinski National Park
Autorzy:
Bociag, K.
Chlost, I.
Cieslinski, R.
Gos, K.
Kujawa-Pawlaczyk, J.
Makles, M.
Pawlaczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/880849.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
Slowinski Park Narodowy
torfowiska
renaturyzacja
rosliny torfotworcze
wyspy plywajace
gazy cieplarniane
ograniczanie emisji
zmiany klimatyczne
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2017, 19, 2[51]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of morphological needle traits of Scots pine (Pinus sylvestris L.) among populations from mountain and lowland regions of Poland
Autorzy:
Labiszak, B.
Lewandowska-Wosik, A.
Pawlaczyk, E.M.
Urbaniak, L.
Powiązania:
https://bibliotekanauki.pl/articles/38659.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2017, 59, 2
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wieloszczelinowe rdzenie w dławikach filtrów sinusoidalnych
Multi-gap cores in chokes applied in sine-wave filters
Autorzy:
Łukiewski, M.
Łukiewska, A.
Pawlaczyk, L.
Powiązania:
https://bibliotekanauki.pl/articles/1199523.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
filtry sinusoidalne
dławiki rdzeniowe
rdzenie wieloszczelinowe
sine wave filters
core reactors
multi-gap cores
Opis:
Selected issues related to the construction of the core chokes applied in sine wave filters were described in this paper. Comparison of test results and simulations of the impact of multi-gap core construction on the losses and acoustic field around the filter were presented. The tests were performed for the sine wave FluxSIN type filter. Simulation parameters were calculated with the help of the design software by RALE Engineering GmbH.
W artykule omówiono wybrane zagadnienia związane z budową dławików rdzeniowych stosowanych w filtrach sinusoidalnych układów napędowych. Przedstawiono porównanie wyników badań oraz symulacji wpływu konstrukcji rdzenia wieloszczelinowego na straty dławika i pole akustyczne wokół filtru. Badania przeprowadzono dla filtru sinusoidalnego typu FluxSIN. Parametry symulacyjne wyznaczono wykorzystując oprogramowanie projektowe firmy RALE Engineering GmbH.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2017, 2, 114; 185-188
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność taborskiej sosny zwyczajnej (Pinus sylvestris L.) z Nadleśnictwa Miłomłyn wyrażona w analizie cech morfologii igieł oraz polimorfizmie mikrosatelitarnego DNA
Variability of Scots pine (Pinus sylvestris L.) called Taborz pine (Forest District Milomlyn) expressed in analysis of morphology of needle traits and polymorphism of microsatellite DNA
Autorzy:
Lesiczka, P.
Pawlaczyk, E.M.
Łabiszak, B.
Urbaniak, L.
Powiązania:
https://bibliotekanauki.pl/articles/1292493.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
Nadlesnictwo Milomlyn
drzewa lesne
sosna zwyczajna
Pinus sylvestris
zmiennosc
sosna taborska
igly sosny
cechy morfologiczne
DNA mikrosatelitarny
polimorfizm genetyczny
markery molekularne
genom jadrowy
genom chloroplastowy
Scots pine from Tabórz
needle morphology
nuclear (nrSSR) and chloroplast (cpSSR) microsatellite DNA
genetic
variation
Opis:
Scots pine (Pinus sylvestris L.) is one of the most widespread forest trees in the world, ranging from southern Mediterranean mountains to eastern Siberia. 30 trees of Scots pine from the Miłomłyn Forest District were analyzed in terms of 7 nuclear and 8 chloroplast microsatellite DNA loci as well as 7 morphological needle traits. Nuclear microsatellites (Simple Sequence Repeats) have proved to be useful in studying phylogeographic and gene flow patterns in conifers and are being used to infer the demographic history of tree species. A population’s genetic diversity, in fact, represents an important criterion which could be applied in planning future forest management and breeding. Additionally, many elements of Scots pine morphology, including needle traits, are subject to environmental modification. However, the adaptability of those traits remains, to some extent, under genetic control. The trees we investigated here are called Tabórz pine located in the northeast of Poland. This population is described as one of the best in Poland and even in Europe regarding bio mass production, ductility and wood quality. The aim of the study was to determine variation and genetic structure within this population. An analysis of phenotypic differentiation showed that the traits which differed the most between individuals were needle length, the number of serrations per 2 mm of needle length along the right edge and the number of stomatal rows on the convex side of the needles. In Tabórz pine, we detected 30 different genotypes with 87 alleles as well as 28 haplotypes with 30 alleles. We also revealed a slight excess of homozygotes, but the population is still in Hardy-Weinberg equilibrium. The Scots pine population from Tabórz furthermore showed a higher level of genetic diversity compared to stands from other Polish and European regions. This diversity may be the main factor impacting on the population’s wood quality and its breeding value.
Źródło:
Leśne Prace Badawcze; 2017, 78, 2
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molekularna identyfikacja gatunków z rodzaju Abies na podstawie polimorfizmu DNA mitochondrialnego
Molecular identification of species from Abies genus based on the mitochondrial DNA polymorphism
Autorzy:
Pawlaczyk, E.M.
Staniak, J.
Maliński, T.
Bobowicz, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/989708.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
genetyka roslin
jodla
Abies
gatunki roslin
identyfikacja
haplotypy
DNA mitochondrialny
polimorfizm DNA
abies species
haplotype
capillary electrophoresis
mitochondrial marker
Opis:
The plant material was collected on 34 individuals growing in the Dendrological Garden of Poznań University of Life Sciences (52°25'32,95" N 16°53'39,83" E) and Botanical Garden of Adam Mickiewicz University in Poznań (52°25'11,70" N 16°52'55,07" E). The species for this study originated from Europe, Asia Minor, central and eastern Asia and North America and included: Abies alba, Abies cephalonica, Abies cilicica, Abies equi−trojani, Abies sibirica, Abies koreana, Abies pinsapo, Abies ×insignis, Abies bornmulleriana, Abies homolepsis, Abies holophylla, Abies grandis, Abies concolor, Abies concolor var. violacea, Abies concolor var. lowiana, Abies nordmanniana, Abies ×arnoldiana, Abies nephrolepis and Abies balsamea. The aim of this study was to define the species haplotypes (the length of allele) on the basis of nad5−4 mitochondrial DNA marker detected by capillary electrophoresis. This marker has been suggested as an easy−to−use tool to distinguish species of the Abies genus and it could be species−specific. Seven different haplotypes were identified. The first one appears in the species from Europe, Asia and North America. The second one was detected in firs from Europe and Asia Minor. A. cephalonica and A. sibirica were identified by the third haplotype, which occurs also in A. alba from the Balkan region. The fourth haplotype is characteristic for species from Asia and North America. The fifth and sixth haplotypes were identified in A. pinsapo and A. numidica. The seventh haplotype was detected only in A. holophylla. Applied marker is a very useful for verification of fir species especially allopatric species, less for parapatric ones. This marker is more helpful to exclude the species than to precisely identify them.
Źródło:
Sylwan; 2015, 159, 08; 675-683
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Annoyance Related to Wind Turbine Noise
Autorzy:
Pawlaczyk-Łuszczyńska, M.
Dudarewicz, A.
Zaborowski, K.
Zamojska-Daniszewska, M.
Waszkowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/178067.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wind turbines
noise
annoyance
Opis:
A questionnaire inquiry on response to wind turbine noise was carried out on 361 subjects living in the vicinity of 8 wind farms. Current mental health status of respondents was assessed using Goldberg General Health Questionnaire GHQ-12. For areas where respondents lived, A-weighted sound pressure levels (SPLs) were calculated as the sum of the contributions from the wind power plants in the specific area. Generally, 33.0% of respondents were annoyed outdoors by wind turbine noise at the calculated A-weighted SPL of 31–50 dB, while indoors the noise was annoying to 21.3% of them. The propor- tion of subjects evaluating the noise produced by operative wind turbines as annoying decreased with increasing the distance from the nearest wind turbine (27.6% at the distance of 400–800 m vs 14.3% at the distance above 800 m, p < 0.016). On the other hand, the higher was the noise level, the greater was the percentage of annoyed respondents (14.0% at SPL up to 40 dB vs 28.1% at SPL of 40–45 dB, p < 0.016). Besides noise and distance categories, subjective factors, such as general attitude to wind turbines, sensitivity to landscape littering and current mental health status, were found to have significant impact on the perceived annoyance. About 50% of variance in annoyance rating might be explained by the aforesaid subjective factors.
Źródło:
Archives of Acoustics; 2014, 39, 1; 89-102
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of resin composites modified with nanogold and nanosilver
Autorzy:
Sokołowski, J.
Szynkowska, M. I.
Kleczewska, J.
Kowalski, Z.
Sobczak-Kupiec, A.
Pawlaczyk, A.
Sokołowski, K.
Łukomska-Szymańska, M.
Powiązania:
https://bibliotekanauki.pl/articles/306218.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
anogold
nanosilver
composite
diametral tensile strength
microhardness
ion release
light transmission
nanosrebro
kompozyty
mikrotwardość
transmisja światła
Opis:
Silver and gold have been used for centuries as antimicrobial agents. The aim of the study was to investigate diametral tensile strength, microhardness, ion release and light transmission of experimental resin composites. Flowable dental composite SDR (Dentsply, United Kingdom) was modified by nanogold, nanosilver and silica addition. The metal ion release, light transmission study, microhardness, Diametral Tensile Strength were evaluated. The experimental nanosilver-containing composites released significant amounts of Al, Si, Sr and Ba ions up to 30 days, and negligible silver ion amounts. Significant Ag ion release occurred in nanosilver- and nanogoldmodified composite. Resin composites modified with nanogold and nanosilver deposited on silica carrier exhibit lower light transmission and have opaque appearance. All experimental composites exhibited higher microhardness in comparison to non-modified resin composites. Diametral Tensile Strength of the experimental composites was comparable to the control group.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 1; 51-61
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proportion of sapwood and heartwood in stems of European Larch (Larix decidua Mill.) origin from provenances experimental plot
Udział drewna bielastego i twardzielowego w strzałach modrzewia europejskiego (Larix decidua Mill.) pochodzącego z powierzchni proweniencyjnej
Autorzy:
Jakubowski, M.
Szaban, J.
Kowalkowski, W.
Pawlaczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/7922.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Opis:
Proportion of sapwood and heartwood in stems of European Larch (Larix decidua Mill.) origin from provenances experimental plot. The aim of this work was to statě wether the wood from different provenances of European Larch (Larix decidua Mili.) show differences in proportion of sapwood and heartwood in stems. Research were carried out on 56 trees erepresenting 6 provenances of larch: Bliżyn (10), Czerniejewo (5), Konstancjewo-Tomkowo (3), Krościenko (15), Rawa Mazowiecka-Trębaczew (6), Skarżysko (9). This plot is a part of unique research area established in 1966. Results show important differences between heartwood-sapwood proportion for two provenances: Krościenko - the heighest proportion (largest volume of heartwood) and Bliżyn the lowes proportion (least volume of heartwood). The other provenances show similar proportions.
Udział drewna bielastego i twardzielowego w strzałach modrzewia europejskiego (Larix decidua Mill.) pochodzącego z powierzchni proweniencyjnej. Celem pracy było stwierdzenie, czy drewno pochodzące z różnych proweniencji modrzewia europejskiego (Larix deciuda Mill.) wykazuje różnice w udziale drewna bielastego i twardzielowego. Badania przeprowadzono wzdłuż osi strzał 56 drzew reprezentujących 6 pochodzeń modrzewia: Bliżyn (10), Czerniejewo (5), Konstancjewo-Tomkowo (3), Krościenko (15), Rawa Mazowiecka-Trębaczew (6), Skarżysko (9). Do badań udziału twardzieli wykorzystano współczynnik T będący stosunkiem szerokości drewna twardzieli do szerokości drewna bielu na przekroju poprzecznym. Udział twardzieli badano na całej długości strzały w odległościach co 2 m począwszy od podstawy pnia. W badaniach stwierdzono istotne różnice we względnym udziale drewna bielastego i twardzielowego w dwóch proweniencjach (Krościenko - największy udział twardzieli oraz Bliżyn - najmniejszy udział twardzieli).
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2014, 88
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 38

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