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Wyświetlanie 1-15 z 17
Tytuł:
Analysis of genetic components of winter oilseed rape (Brassica napus ssp. oleifera ) regeneration ability under in vitro culture
Autorzy:
Turczynowska, A.
Siatkowski, I.
Broda, Z.
Powiązania:
https://bibliotekanauki.pl/articles/81013.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
winter oilseed rape
Brassica napus var.oleifera
in vitro culture
regeneration ability
general combining ability
specific combining ability
heritability
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of genetic components of winter oilseed rape (Brassica napus ssp. oleifera ) regeneration ability under in vitro culture
Autorzy:
Turczynowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/951192.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
winter oilseed rape
Brassica napus var.oleifera
in vitro culture
genotypic diversity
regeneration ability
plant regeneration
general combining ability
specific combining ability
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combining ability analysis of seven silk yield attributes in silkworm, Bombyx mori L.
Autorzy:
Bhargava, S K
Powiązania:
https://bibliotekanauki.pl/articles/2048119.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silkworm
silk yield
Bombyx mori
combining ability
Opis:
The combining ability effects of five silkworm (Bombyx mori L.) strains and their 20 F₁'s including reciprocals were analysed in a 5x5 diallel cross for seven silk yield attributes, viz. effective rate of rearing (ERR), a measure of survival, cocoon yield, cocoon weight, shell weight, raw silk percentage, silk filament length/cocoon and silk reelability. Higher values of specific combining ability (SCA) than the corresponding general combining ability (GCA) for all the attributes except ERR and cocoon yield are indicative of non-additive gene action. The parental strain JC2P was the best general combiner for all the attributes, except cocoon yield. The highest general combining ability effect for cocoon yield was shown by N4. The highest desirable or positive SCA effects resulted from N4 × SH2 (all the attributes except shell weight), JC2P × 14M (all the attributes except cocoon weight and shell weight), 14M × SH2 (all the attributes except ERR), N4 × SPJ1 (all the attributes except shell weight and raw silk percentage). Only one reciprocal, namely SPJ1 × N4, showed positive effects for all the attributes except silk reelability. The improvement of cocoon yield through mass selection followed by intermating and the use of the parental strain JC2P in future cross breeding are discussed.
Źródło:
Journal of Applied Genetics; 1995, 36, 1; 59-67
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Developments of employment by broad age-groups in Poland in the years 1998–2008. Do their determinants differ?
Autorzy:
Grabowska, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/418251.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
employment profiles
age groups
employment determinants
work ability.
Opis:
The latest Eurostat projections show that both population and labour force ageing change employment profiles by age in the European Union countries even in case of an increase in labour force participation and employment (The 2012 Ageing Report). My research question is how basic individual (such as age, education, household position, place of residence) and contextual characteristics (such as the business cycle and the regional labour market situation) influence on employment opportunities in Poland. I test whether the impact of different factors varies with age, which has been categorized to reflect different stages of the life course: youth and young adults (15–29 years old), prime aged (30–54 years old), and older workers (for women: 55–59, for men: 55–64). To answer the research question three types of multilevel logistic models were applied: (a) general models with age as one of the basic determinants, (b) models for each age group for non-agriculture and agriculture. The data used come from the Polish Labour Force Survey (BAEL) of the years 1998–2008 and regional labour market data. The analysis reveals that there are differences in influence of individual and context variables on employment odd ratios between age groups, sex and employment sectors.
Źródło:
Studia Demograficzne; 2014, 165, 1; 55-81
0039-3134
Pojawia się w:
Studia Demograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Language analytic ability in advanced FL learners: a comparative study
Autorzy:
Turula, Anna
Powiązania:
https://bibliotekanauki.pl/articles/577051.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
language aptitude
working memory
analytic language ability
CALP
BICS
Opis:
The article is intended as a voice in the discussion on language aptitude, with particular regard to its two components: memory and language analytic ability. It will be argued here that – unlike memory, favoured by Skehan (2003) – it may be the language analytic ability manifested, among others, as considerable dexterity in retrieving constructional schematizations to decode language innovation, which grows in importance with learner proficiency. It will also be argued here that both capacities, the said ability as well as memory, should be considered in relation to working memory, which should be understood in terms of storage and processing considered separately and ascribed to individual differences, and not as a homogenuous storage-and-processing space.
Źródło:
Linguistica Silesiana; 2011, 32; 275-287
0208-4228
Pojawia się w:
Linguistica Silesiana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduced Glass-Transition Temperature versus Glass-Forming Ability in FeCoB-Based Amorphous Alloys
Autorzy:
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/353224.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
glass-transition temperature
bulk amorphous alloys
glass-forming ability
Opis:
This work presents studies concerning the relationship between reduction of glass transition temperature Trg and the glass-forming ability of FeCoB-based alloys. On the basis of theoretical considerations, Turnbull [1] determined the reduced glass transition temperature (Tg/Tl) as being 2/3 of the Vogel–Fulcher–Tammann (VFT) temperature; since then, continuous research has been carried out, aiming to calculate the Trg parameter and describe its relationship with glass-forming ability. In the majority of research papers, the reduced glass transition temperature is calculated from the relationship Tg/Tm, proposed by Uhlmann and Davies [2, 3]. On the basis of differential scanning calorimetry (DSC) studies, undertaken in this current work, the values of the following temperatures have been found: Tg, Tx, Tm and Tl, in addition to the temperature ranges: ΔTx, ΔTm and ΔTl. The correlation between: Tg/Tm, Tg/Tl and the glass-forming ability also has been discussed. Finally, for the investigated alloys, it has been found that the relationship proposed by Turnbull is reliable over a wide range of ΔTm.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 1957-1962
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Buildability of Mortar Feedstock in Material Extrusion Additive Manufacturing
Autorzy:
Park, Jinsoo
Lee, Hojae
Choi, Hanshin
Powiązania:
https://bibliotekanauki.pl/articles/354837.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
mortar feedstock
shape retention ability
buildability
overlaying mode
Opis:
Mortar feedstock is extruded to form bead and it is selectively placed line by line in the material extrusion additive manufacturing. With respects to part building process healthiness, load-supporting ability of overlaid beads is emphasized as buildability. Buildability is primarily dependent on thixotropic properties of feedstock and vertical overlapping schedule. In the present study, water-to-binder (w/b) ratio was chosen as material aspect to assess buildability. Uneven bead shape evolution and premature failure were highlighted owing to low yield stress of high w/b ratio feedstock. Feedstock with optimum w/b ratio showed good buildability even at the interval time of 19 sec.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1069-1072
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maternal Parenting Attitudes and Preschoolers’ Hot and Cool Executive Functions
Autorzy:
Kamza, Anna
Putko, Adam
Złotogórska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/430701.pdf
Data publikacji:
2016-06-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
parent-child relationship
maternal attitudes
cool and hot executive functions
verbal ability
Opis:
The relationships between maternal parenting attitudes and preschoolers’ hot and cool executive functions (EF) were examined. Forty-eight children aged 3 to 4 years and their mothers took part in the study. Self-report questionnaire concerning parenting attitudes was obtained from the mothers of children who performed a set of EF tasks. Additionally, both maternal and child verbal ability were controlled. It was found that maternal parenting attitudes were related only to child cool EF. Protecting attitude was positively related to child inhibitory control and autonomy support was negatively related to child set-shifting ability. Further analyses revealed that maternal autonomy support accounted for unique variance in child set-shifting, above and beyond the child’s age. On the other hand, protecting attitude accounted for unique variance in child inhibitory control, above and beyond child verbal ability. The findings provide further evidence for the importance of mother-child relationships in children’s EF development.
Źródło:
Polish Psychological Bulletin; 2016, 47, 2; 236-246
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences between organically grown varieties of spring wheat, in response to weed competition and yield
Autorzy:
Feledyn-Szewczyk, B.
Jonczyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/66147.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
competitive ability
organic agriculture
plant variation
spring wheat
wheat
plant response
weed competition
yield
Opis:
When growing wheat, one of the non-chemical methods of weed regulation is to choose wheat varieties which have a high ability to compete with weeds. The first aim of the research was the estimation of the relationships between the morphological features and canopy parameters of six spring wheat varieties. The second aim was the estimation of the varieties’ competitive ability against weeds. The third aim was the estimation of the grain yield of the six varieties. The experiment was carried out in the 2011–2013 time period, on fields which had been organically managed since 1994. Different features affected the weed infestation levels of the spring wheat varieties. For Bombona, negative correlations between the number of weeds and the height, dry matter of wheat, and wheat density, were proved. For Brawura, Hewilla, and Żura, the height, number of tillers, and dry matter of wheat were the main factors influencing weed abundance. A strong negative correlation between the number of weeds and the dry matter of wheat was found for Parabola. Cluster analysis indicated that Bombona and Brawura were the most competitive against weeds, while Monsun and Parabola were characterized as being the least competitive against weeds. Weed number significantly affected the grain yield of spring wheat (r = –0.418). The grain yield was positively correlated with the number of tillers (r = 0.459) and ears (r = 0.355), and the height (r = 0.534) and wheat dry matter (r = 0.411). Bombona and Brawura were the lowest yielding varieties (3.03 and 3.20 t ∙ ha–1, respectively), whereas the highest yield was achieved by Żura (3.82 t ∙ ha–1, on average).
Źródło:
Journal of Plant Protection Research; 2015, 55, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the regeneration ability of Brassica interspecific hybrids in in vitro anther culture
Autorzy:
Wojciechowski, A.
Niemann, J.
Powiązania:
https://bibliotekanauki.pl/articles/951274.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
anther culture
haploid plant
homozygous line
interspecific hybrid
Brassica
regeneration ability
in vitro condition
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer- Aided Design of Steel Casting Taking into Account the Feeding Ability
Autorzy:
Polyakov, S.
Kuzyi, O.
Korotschenko, A.
Korovin, V.
Bast, J.
Powiązania:
https://bibliotekanauki.pl/articles/382561.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computer-aided design
casting
solidification
cast designer
freeCAD
feeding ability
riser
projektowanie wspomagane komputerowo
odlew
krzepnięcie
Opis:
A new Computer-Aided Design approach is introduced for design of steel castings taking into account the feeding ability in sand moulds. This approach uses the geometrical modeling by a CAD-program, in which the modul “Castdesigner” is implemented, which includes the feeding models of steel castings. Furthermore, the feeding ability is guaranteed immediately during the design by an interactive geometry change of the casting cross section, so that a directional feeding of the solidifying casting from the installed risers is assured.
Źródło:
Archives of Foundry Engineering; 2016, 16, 1; 49-54
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of growth regulators on the regeneration ability of flax (Linum usitatissimum L.) hypocotyl explants in in vitro culture
Autorzy:
Janowicz, J.
Niemann, J.
Wojciechowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/81289.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flax
Linum usitatissimum
Selena Cultivar
Modran cultivar
growth regulator
regeneration ability
in vitro culture
hypocotyl
6-benzylaminopurine
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2012, 93, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatoxin-a induces apoptosis of leukocytes and decreases the proliferative ability of lymphocytes of common carp (Cyprinus carpio L.) in vitro
Autorzy:
Bownik, A.
Rymuszka, A.
Sieroslawska, A.
Skowronski, T.
Powiązania:
https://bibliotekanauki.pl/articles/31172.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
anatoxin
apoptosis
leucocyte
proliferative ability
lymphocyte
common carp
Cyprinus carpio
in vitro culture
immunotoxicity
fish
anatoxin-a
cyanotoxin
necrosis
Opis:
Cyanobacteria (Cyanophyta, Cyanoprocaryota, Cyanobacteria) (blue-green algae) are procaryotic phototrophic microorganisms playing an important ecological role in the freshwater and marine environment as primary producers. However, as a consequence of water eutrophication observed in many reservoirs in different parts of the world, these microorganisms form massive scums, known as water blooms, releasing cyanotoxins hazardous to fish and other aquatic organisms. Cyanotoxins are cyanobacterial secondary metabolites of various chemical structures harmful to humans, terrestial and aquatic animals such as fish. The most abundant cyanotoxins are microcystins and hepatotoxins inducing toxic changes in fish liver, kidney, gills, digestive tract and immune system. Very little is known on the effects of alkaloid neurotoxic anatoxin-a on fish and their immunity. The aim of this study was to assess the in vitro influence of anatoxin-a on immune cells isolated from the common carp (Cyprinus carpio L.). The leukocyte intracellular level of ATP was reduced only at the highest concentration of anatoxin-a. Apoptotic and necrotic leukocytes were observed at the lower and the highest concentrations of anatoxin-a, respectively. Elevated activity of caspases 3/7 after 2 hours and a concentration-dependent decrease in the proliferative ability of T and B lymphocytes was also observed. The results suggest that anatoxin-a could be a possible immunotoxic agent in the aquatic environment and may increase the susceptibility of fish to infectious and neoplastic diseases. Therefore, constant monitoring of anatoxin-a and its producers in lakes and fish ponds should be performed.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dimensionality Reduction for Probabilistic Neural Network in Medical Data Classification Problems
Autorzy:
Kusy, M.
Powiązania:
https://bibliotekanauki.pl/articles/226697.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
probabilistic neural network
dimensionality reduction
feature selection
feature extraction
single decision tree
random forest
principal component analysis
prediction ability
Opis:
This article presents the study regarding the problem of dimensionality reduction in training data sets used for classification tasks performed by the probabilistic neural network (PNN). Two methods for this purpose are proposed. The first solution is based on the feature selection approach where a single decision tree and a random forest algorithm are adopted to select data features. The second solution relies on applying the feature extraction procedure which utilizes the principal component analysis algorithm. Depending on the form of the smoothing parameter, different types of PNN models are explored. The prediction ability of PNNs trained on original and reduced data sets is determined with the use of a 10-fold cross validation procedure.
Źródło:
International Journal of Electronics and Telecommunications; 2015, 61, 3; 289-300
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of nutrient shortage on the expression of combining ability effects for root characters in spring barley [Hordeum vulgare L.]
Autorzy:
Gorny, A G
Powiązania:
https://bibliotekanauki.pl/articles/2043156.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
root system
water shortage
heritability
dominance
low-input breeding
mineral shortage
additivity
nutrient shortage
root size
genotype
barley
Hordeum vulgare
combining ability
Źródło:
Journal of Applied Genetics; 2000, 41, 2; 63-73
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 17

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