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Ugotavljanje insekticidnih lastnosti lesa modificiranega s sredstvom Meldur-DMES : diplomsko delo - visokošolski strokovni študij
ID Uršič, Marko (Author), ID Pohleven, Franc (Mentor) More about this mentor... This link opens in a new window, ID Humar, Miha (Reviewer)

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PID: 20.500.12556/rul/c93ee2ad-f6da-4501-afc6-e5bc6e9fffbd

Abstract
Pri uvajanju novih zaščitnih sredstev je treba izvesti vrsto raziskav in preizkušanj. Sredstvo Meldur-DMES smo testirali, da bi ugotovili njegovo učinkovitost proti termitom. Vzorce lesa bora in smreke smo modificirali s koncentracijama reagenta (5 in 10 % z in brez katalizatorja), nato pa smo jih še termično modificirali pri temperaturi 170 °C. S tem se je lesu izboljšala odpornost na biotične dejavnike in povečala dimenzijska stabilnost. Pred izpostavitvijo rumenovratemu termitu - Kalotermes flavicollis, smo vzorce sprali/umetno starali po standardu SIST EN 84. Ugotovili smo, da je sredstvo učinkovito, vendar le, če so vzorci kemično modificirani z višjo koncentracijo Meldur-DMES-a. Odpornost na termite se še izboljša s termično modifikacijo pri 170 °C. Vzorci modificirani z Meldur-DMESom s katalizatorjem (borova kislina) in temperaturo 170 °C so najbolj odporni na termite, saj je smrtnost največja, poškodbe vzorcev pa minimalne.

Language:Slovenian
Keywords:les, insekticidne lastnosti, modifikacija, Meldur-DMES
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Place of publishing:Ljubljana
Publisher:[M. Uršič]
Year:2009
Number of pages:IX, 51 f., [8] f. pril.
PID:20.500.12556/RUL-446 This link opens in a new window
UDC:630*841
COBISS.SI-ID:1777801 This link opens in a new window
Publication date in RUL:11.07.2014
Views:1432
Downloads:264
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Secondary language

Language:English
Abstract:
At introduction of new protective means lots of researches and testings have to be done. The efficiency of Meldur-DMES, a protective means against termites, was tested. Samples of boron and spruce were modified with 2 concentrations of reagent (5 and 10 % with and without a catalyzer), and afterwards thermally modified at 170 °C. These 2 procedures improved the resistance of wood on biotic stability and increased its dimension stability. Before exposing samples to yellowneck termite (Kalotermes flavicollis) they were washed/artificially aged according to standard SIST EN 84. It was found out that this means is effective only when the samples are modified with higher concentration of Meldur-DMES. Thermal modification at 170 °C improves the resistance on thermites even more.Samples, modified with Meldur-DMES with catalyzer (boric acid) at 170 °C show the best thermite resistance, because at these conditions the mortality rate is the biggest and injury of samples minimal.

Keywords:wood, insecticidal properties, modification, Meldur-DMES

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