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Wyświetlanie 1-3 z 3
Tytuł:
Soybean seed germinattion and seedling growth in response to deterioration and priming: effect of seed size
Autorzy:
Moshtaghi-Khavaran, Amir
Khomari, Saeid
Zare, Naser
Powiązania:
https://bibliotekanauki.pl/articles/2199614.pdf
Data publikacji:
2014-12-18
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
aging
germination
priming
seed size
soybean
Opis:
A laboratory experiment was conducted to determine if separation of soybean [Glycine max (L.) Merr.] seeds by size might be effective in germinability of aged and primed seeds and subsequent seedling vigour. A known soybean seed lot was separated into four size classes using round-hole screens. The seed lots were deteriorated by rapid aging and invigorated by hydro- and halo-priming. These pre-treated seeds were planted in rolled paper towels and the results were evaluated according to ISTA rules. The small soybean seeds had higher speed of germination than the other size classes. The seedlings produced from large and medium seeds were longer and heavier than those from other size classes. Our results indicated that the large seeds had less sensitivity to short-term aging condition owing to the number of normal seedlings, while the deterioration more increased the germination time of large and medium seeds, compared to small ones. The alleviatory effects of halo-priming on deterioration of seeds are greater compared with hydro-priming. Although there are some debates, the present data further indicate that larger soybean seeds are susceptible to aging condition.
Źródło:
Plant Breeding and Seed Science; 2014, 70; 55-67
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Relationship between Distributed Leadership and Work Self-Efficacy with the Mediating Role of Academic Optimism of the Teacher
Autorzy:
Zare, Mona
Nastiezaie, Naser
Powiązania:
https://bibliotekanauki.pl/articles/1967520.pdf
Data publikacji:
2019-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Distributed Leadership
Teacher’s Academic Optimism
work Self-Efficacy
Opis:
The purpose of this study was to investigate the relationship between distributed leadership and job self-efficacy with the mediating role of academic optimism of the teacher. This study is applied and correlation research based on structural equation modeling. 281 teachers of Zahedan city were selected using stratified random sampling. To collect information, three questionnaires were used: distributed leadership (Gholami, Sahranavard, & Azizi, 2014), job self-efficacy (Riggs & Knight, 1994) and teacher’s academic optimism (Beard, Hoy, & Woolfolk, 2010). For data analysis the Pearson correlation coefficient was calculated using SPSS and structural equation modeling was done using Lisrel software. Based on the results the direct effect of distributed leadership on job self-efficacy (β=0.33), the direct effect of distributed leadership on teacher’s academic optimism (β=0.76) and the direct effect of teacher’s academic optimism on job self-efficacy (β=0.42) was found to be significant. The indirect effect of distributed leadership on job self-efficacy was also found to be significant with the mediating role of organizational laziness (β=0.352). Therefore, it can be concluded that through applying a distributed leadership style in schools (with regard to trust-based leadership, a democratic climate, comprehensive support, and teachers’ professional development) the level of teachers’ academic optimism increases. With an increase in teachers’ academic optimism, their job performance can be expected to improve.
Źródło:
The New Educational Review; 2019, 58; 169-178
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of Thermoelectric Efficiency and Optical Properties of Hydrogen Absorption in SiC:Mn Nanotube
Autorzy:
Shahraki, Amir Toofani
Gol, Heydar Ali Shafiei
Kimiagar, Salimeh
Dehnavi, Naser Zare
Powiązania:
https://bibliotekanauki.pl/articles/2106575.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
DFT
SiC:Mn-H NT
electronic property
thermometric
optical property
Opis:
The effects of hydrogen absorption and manganese substitution on structural, electronic, optical, and thermoelectric properties of silicon-carbon nanotubes (SiCNT) are studied using the density functional theory and the GGA approximation. An examination of the PDOS curves and the electronic band structure showed that the Mn substitution leads to an increase in magnetic anisotropy and the occurrence of semi-metallic behavior and that the hydrogen absorption shifts the band gap toward the lower energies. A study of these nanostructures’ thermoelectric behavior reveals that the H absorption leads to a significant escalation in the figure of merit of the SiCNT to about 1.6 in the room temperature range. The effects of the H absorption on this nanotube’s optical properties, including the dielectric functions and its absorption spectra, are also investigated.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 397--403
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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