diplomsko delo
Jožica Janežič (Author), Alenka Gaberščik (Mentor), Tadeja Trošt Sedej (Thesis defence commission member), Mateja Germ (Thesis defence commission member)

Abstract

Preučevali smo optične lastnosti šotnega mahu vrste Sphagnum teres. Primerjali smo optične lastnosti pri sveži in suhi blazinici. Ugotavljali smo odbojnost kapituluma šotnega mahu, določili vsebnosti barvil (klorofilov a in b, karotenoidov, antocianov) ter UV absorbirajočih snovi. Preučevali smo tudi fotokemično učinkovitost šotnega mahu. Odbojnost in fotokemično učinkovitost smo merili tudi pri ponovnem namakanju osušene blazinice. Rezultati so pokazali, da se optične lastnosti sveže in suhe blazinice šotnega mahu statistično značilno razlikujejo. Odbojni spektri suhe blazinice šotnega mahu so višji kot odbojni spektri sveže blazinice. Odbojnost je bila najbolj podobna v vidnem delu spektra, razlikovala pa se je v UV in NIR območju. Ugotovili smo, da ni bilo statistično značilnih razlik v vsebnosti barvil v suhi in sveži blazinici. Pri sveži blazinici je bila izmerjena značilno višja fotokemična učinkovitost. Ugotovili smo, da si po ponovnem namakanju odtrgane rastline vrste Sphagnum teres ne opomorejo neposredno po namočenju.

Keywords

šotni mah;optične lastnosti;odbojnost;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [J. Janežič]
UDC: 582.32(043.2)
COBISS: 28116227 Link will open in a new window
Views: 205
Downloads: 19
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Other data

Secondary language: English
Secondary title: Optical properties of Sphagnum Moss
Secondary abstract: The present study focuses on the optical properties of the peat moss species Sphagnum teres by contrasting the optical properties of a fresh and a dry moss. We examined parameters such as the reflectance of the moss capitulum, the content of chlorophylls, carotenoids, antocyanins and UV absorbents, and the photochemical efficiency of the peat moss. Reflectance and photochemical efficiency were also measured after rehydration of the dried pad. The results have shown a statistically significant difference between the optical properties of the fresh and the dry moss. The reflectance spectra of the dry peat moss pad were higher than the reflectance spectra of the fresh moss. The reflectances of the wet and dry moss were the most similar in the visible part of the spectrum, but differ in the UV and NIR ranges. No statistically significantly differences were found in the pigment content between the dry and the fresh moss. The photochemical efficiency was significantly higher in the fresh moss. It was also found that Sphagnum teres plants do not recover shortly after rehydration.
Secondary keywords: biology;biologija;
File type: application/pdf
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Ljubljani, Pedagoška fak., Dvopredmetni učitelj biologije in kemije
Pages: 21 f.
ID: 12021134