diplomsko delo - univerzitetni študij
Gašper Rainer (Author), Franc Pohleven (Reviewer), Miha Humar (Mentor)

Abstract

Bakrove in borove pripravke pogosto uporabljamo za preventivno zaščito lesa, saj že pri nizkih koncentracijah delujejo kot zanesljivi fungicidi, borove spojine pa tudi kot insekticidi. Kljub temu, da se borove učinkovine že dolgo uporabljajo v zaščiti lesa, v literaturi ni zaslediti zanesljivih podatkov o minimalnih kurativnih inhibitornih koncentracijah za glive razkrojevalke lesa. Ugotavljali smo s kakšno koncentracijo pripravka moramo prepojiti les, da preprečimo nadaljnji razvoj lesnih gliv. Za primerjavo smo uporabili še zaščitne pripravke na osnovi bakrovega(II) sulfata pentahidrata. Testirali smo 3 vrste gliv rjave (Antrodia vaillantii, Gloeophyllum trabeum, Serpula lacrymans) in 3 vrste gliv bele trohnobe (Trametes versicolor, Hypoxylon fragiforme, Pleurotus ostreatus). Rezultati testiranja kažejo, da je kurativna učinkovitost bakrovega(II) sulfata pentahidrata bistveno slabša od borove kisline. Opazili smo, da zaustavimo delovanje večine gliv, če lesne vzorce prepojimo s pripravki s 5.000 ppm bora. Največjo toleranco na borove pripravke sta izkazali (Antrodia vaillantii) in (Serpula lacrymans). Za zaustavitev rasti omenjenih gliv smo morali les prepojiti s pripravki, ki so vsebovali 8.700 ppm bora.

Keywords

zaščita lesa;bakrovi pripravki;borovi pripravki;glive razkrojevalke lesa;minimalna inhibitorna koncentracija;

Data

Language: Slovenian
Year of publishing:
Source: Ljubljana
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [G. Rainer]
UDC: 630*844.2
COBISS: 1772425 Link will open in a new window
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Other data

Secondary language: English
Secondary title: Determination of minimal curative concentrations of boric acid and copper sulphate against wood decay fungi
Secondary abstract: Copper and boron based biocides are frequently used for wood preservation, their compounds being very effective at relatively low concentrations. Additionally, boron compounds have insecticidal properties as well. In spite of the relatively extensive use of copper and boron based preservative solutions, exact minimal remedial concentrations are not elucidated yet. The thesis tries to determine the concentration of boron and copper based aqueous solutions to inhibit fungal growth in infested wood. 3 brown rot fungi (Antrodia vaillantii, Gloeophyllum trabeum, Serpula lacrymans) and 3 white rot fungi (Trametes versicolor, Hypoxylon fragiforme, Pleurotus ostreatus) were utilized for testing. The results show that the curative efficacy of copper compounds is much lower than that of copper compounds. The growth of the great majority of the fungi tested is inhibited after submersion to aqueous solution of 5,000 ppm of boron. The highest tolerance against boron based biocides was determined at (Antrodia vaillantii). To prevent growth of these fungi in infested wood, the preservative solution containing 8,700 ppm of boron is required.
Secondary keywords: wood preservation;boron based biocides;copper based preparation;wood decay fungi;minimal inhibitory concentration;
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Ljubljani, Biotehniška fakulteta, Odd. za lesarstvo
Pages: XI, 66 f.
Keywords (UDC): applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;forestry;gozdarstvo;forest products and their utilization;gozdni proizvodi in njihova uporaba;
ID: 21711