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Wyświetlanie 1-2 z 2
Tytuł:
The dependence of dental caries on oral hygiene habits in preschool children from urban and rural areas in Poland
Autorzy:
Kamińska, Aneta
Szalewski, Leszek
Batkowska, Justyna
Wallner, Jan
Wallner, Eliza
Szabelska, Anna
Borowicz, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/987122.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Tematy:
dental caries
preschool children
dental health
hygiene practices
dft index
Opis:
Introduction. Dental caries is considered to be a modern civilization disease;however, the state of oral health negatively influences psychological and sociological relations in children which leads to feelings of discomfort from early age. Objective. The aim of study was evaluation of the association between incidence of dental caries (d3ft index) in preschool children from urban and rural areas, and determining the relationship between dental caries intensity and hygienic habits. Materials and Method. 844 children aged 3–6 years from the city and the countryside were examined. The survey was conducted among parents/care givers regarding dental care of children. With parents’ consent, the children had a dental examination. Results. The incidence of caries was recorded at the level of 52.61%, with an average value of 4.31 on the d3ft index; however, for the children from the urban area this ratio amounted to 4.15, and in the countryside it reached the value of 4.7. A correlation was found between age and area of residence of the children and various components of hygienic behavior model. Conclusions. More than a half of the children had dental caries in combination with a high frequency of unsatisfactory hygiene needs. There is a relationship between oral hygiene habits and age of the children, depending on the place of residence.
Źródło:
Annals of Agricultural and Environmental Medicine; 2016, 23, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of different optical properties for cubic titanium dioxide: an AB-INITIO approach
Autorzy:
Dash, Debashish
Pandey, Chandan K.
Chaudhury, Saurabh
Tripathy, Susanta K.
Powiązania:
https://bibliotekanauki.pl/articles/102957.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
DFT
cubic TiO2
refractive index
absorption coefficient
reflectivity
TiO2
współczynnik załamania światła
współczynnik absorpcji
współczynnik odbicia
Opis:
This paper presents an analysis of optical properties of cubic titanium dioxide (TiO2) using Orthogonalized Linear Combinations of Atomic Orbitals (OLCAO) basis set under the framework of Density Functional Theory (DFT). Many optical properties such as refractive index, extinction coefficient, reflectivity, absorption coefficient, photoconductivity, and loss coefficient have been studied and analyzed thoroughly. From the analysis of optical properties, it is seen that, cubic TiO2 supports interband transition between states. Reflectivity of pyrite structure TiO2 lies within IRvisible – UV region due to which it qualifies for coating industry. Furthermore, the results are compared with previous theoretical as well as with experimental results. It is found that DFT based simulation produces results which are close approximation to experimental results.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 3; 223-232
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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