Optične lastnosti navadnega vodnega oreška : diplomsko delo

Ferlin, Barbara (author), Gaberščik, Alenka (mentor)

Proučevali smo, kako so optične lastnosti listov navadnega vodnega oreška (Trapa natans L.) povezane z morfološkimi in biokemijskimi značilnostmi. Meritve smo opravili na plavajočih listih izbrane vrste makrofita. Odbojnost in presevnost smo izmerili v območju od 280 nm do 880 nm. Morfološka analiza listov je vključevala debelino listov in specifično listno površino. Biokemijske analize so obsegale meritve vsebnosti barvil (klorofilov a in b, karotenoidov, antocianov in UV-absorbirajočih snovi). Ugotovili smo, da je v UV-območju odbojnost nizka, presevnosti ni; v vidnem območju svetlobnega spektra je vrh pri odbojnosti in presevnosti najvišji v zelenem svetlobnem spektru. V NIR-območju sta odbojnost in presevnost visoki, vendar je odbojnost višja. Rezultati so pokazali, da morfološki parametri ne vplivajo na odbojne in presevne spektre. Največji vpliv na odbojnost in presevnost imajo UV-A in UV-B absorbirajoče snovi; na presevnost v zelenem svetlobnem spektru vpliva tudi klorofil b.

• Language: Slovenian
• Keywords: navadni vodni orešek, odbojnost, presevnost, optične lastnosti listov
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: PEF - Faculty of Education
• Publisher: [B. Ferlin]
• Year: 2015
• Number of pages: IX, 43 str.
• PID: 20.500.12556/RUL-72690
• UDC: 581.5:538.958(043.2)
• COBISS.SI-ID: 10716745
• Publication date in RUL: 29.09.2015

Secondary language

• Language: English
• Title: Optical properties of Trapa natans L.

Abstract

We studied how optical characteristics of plain water chestnut (Trapa natans L.) are connected to morphological and biochemical characteristics. The measurements were performed on floating leaves of the selected type macrophytes. Reflectance and transmittance were measured in the range 280 nm to 880 nm. Morphological analysis of leaves include leaf thickness and specific leaf area. Biochemical analyzes included measuring levels of colorants (chlorophyll a and b, carotenoids, anthocyanins and UV absorbing substances). We have found that, in the UV territory reflectivity is low and there is no transmittance; in the visible range of the spectrum the peak of reflectance and transmittance is maximum in the green specter. In the NIR range of the reflectance and transmittance is high, but reflectivity is higher. The results showed that morphological parameters do not affect the reflective and refractive spectra. The biggest influence on the reflectance and transmittance, have UV-A and UV-B absorbing compounds; in light transmittance in the green spectrum also affects chlorophyll b.

• Keywords: Trapa natans L