Autor: Naczk, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wpływ dodatku trehalozy na wybrane cechy jakościowe pieczywa pszennego
Influence of trehalose addition on selected quality features of wheat bakery products
Autorzy:: Korzeniowska-Ginter, R.
Naczk, A.
Powiązania:: https://bibliotekanauki.pl/articles/2070336.pdf
Data publikacji:: 2009
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: trehaloza
pieczywo pszenne
trehalose
wheat bakery products
Opis:: Celem badań było określenie wpływu zróżnicowanego dodatku dwucu-kru trehalozy do ciasta pszennego na cechy sensoryczne i fizykochemiczne bułek kajzerek. Dodatek trehalozy nie spowodował istotnego pogorszenia cech sensorycznych i fizykochemicznych produktu. Bułki kajzerki z dodatkiem trehalozy w ilości 0,5 i 1% w stosunku do mąki cechowały się dobrą jakością.
The aim of experiments was to investigate an influence of the additi of disaccharide trehalose to wheat dough on sensory and physicocl mical properties of Kaiser rolls. It was stated that the addition oft halose did not worsen sensory and phvsicochemical properties of t product. Kaiser rolls with the addition of 0.5 and 1% trehalose in p portion to flour were characterized by good quality.
Źródło:: Inżynieria i Aparatura Chemiczna; 2009, 2; 72-73
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Genetic diversity of Dactylorhiza incarnata (Orchidaceae) in northern Poland
Autorzy:: Naczk, A.M.
Chybicki, I.J.
Zietara, M.S.
Powiązania:: https://bibliotekanauki.pl/articles/57961.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Botaniczne
Opis:: The genetic structure of Dactylorhiza incarnata var. incarnata populations is shaped not only by historical events such as recolonization after ice sheet retreat or limited seed and pollen dispersal, but also the bottleneck effect. During the last decade, D. incarnata var. incarnata has also experienced a strong decline in population numbers and sizes, due to habitat loss and fragmentation. In the present research genetic diversity was examined in eight populations located in northern Poland, using six nuclear microsatellites loci. At the species level our results showed a moderate mean level of genetic diversity (A = 4.67; Ae = 2.73; Rs = 4.48; Ho = 0.438; FIS = 0.224), which varied among the studied populations (A: 2.17–3.67; Ae: 1.55–2.69; Rs: 1.31–1.61; Ho: 0.292–0.631; FIS: −0.283–0.340). A considerable overabundance of homozygotes was detected in four populations (FIS within the range of 0.067–0.340), and in the remaining populations an excess of heterozygotes was observed. The average apparent out-crossing rate was also calculated (ta = 0.980), and primarily indicated a tendency to out-cross within the species. Moderate genetic differentiation was found among the studied populations (FST = 0.149; RST = 0.174; p < 0.05). The differentiation of the populations corresponded to relatively low gene flow value (Nm = 0.426) among populations, which amounted to only one migrant every second generation.
Źródło:: Acta Societatis Botanicorum Poloniae; 2016, 85, 2
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Exogenous steroid hormones stimulate full development of autonomous endosperm in Arabidopsis thaliana
Autorzy:: Rojek, J.
Pawelko, L.
Kapusta, M.
Naczk, A.
Bohdanowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/59176.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: steroid hormone
endosperm
Arabidopsis thaliana
apomixis
DNA methylation
Opis:: Most flowering plants, including important crops, require double fertilization to form an embryo and endosperm, which nourishes it. Independence from fertilization is a feature of apomictic plants that produce seeds, from which the plants that are clones of the mother plant arise. The phenomenon of apomixis occurs in some sexual plants under specific circumstances. Since the launch of a fertilization-independent mechanism is considered a useful tool for plant breeding, there have been efforts to artificially induce apomixis. We have been able to produce fertilization-independent endosperm in vitro in Arabidopsis over the last few years. This paper demonstrates the methods of improving the quality of the endosperm obtained using plant and mammalian steroid hormones. Additionally, it shows the study on the autonomous endosperm (AE) formation mechanism in vitro. This paper examines the effect of exogenous steroid hormones on unfertilized egg and central cell divisions in culture of unpollinated pistils of Arabidopsis Col-0 wild-type andfie-1 mutant. All media with hormones used (estrone, androsterone, progesterone, and epibrassinolide) stimulated central cell divisions and fertilization-independent endosperm development. The stages of AE development followed the pattern of Arabidopsis thaliana wild type after fertilization. Subsequent stages of AE were observed from 2-nuclear up to cellular with the most advanced occurring on medium with 24-epibrassinolide and progesterone. The significant influence of mammalian sex hormones on speed of AE development and differentiation was noticed. Using restriction analysis, the changes in methylation of FIE gene was established under in vitro condition. The authors of this paper showed that Arabidopsis thaliana has a high potency to fertilization-independent development.
Źródło:: Acta Societatis Botanicorum Poloniae; 2015, 84, 2
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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