20.500.12556/RUL-446 Ugotavljanje insekticidnih lastnosti lesa modificiranega s sredstvom Meldur-DMES diplomsko delo - visokošolski strokovni študij 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. 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. les insekticidne lastnosti modifikacija Meldur-DMES wood insecticidal properties modification Meldur-DMES true false false [M. Uršič] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:25:38 2014-07-11 12:25:38 2022-07-11 10:24:58 0000-00-00 00:00:00 2009 0 Ljubljana 0 IX, 51 f., [8] f. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*841 1777801 UNI_Ursic_Marko_2009.pdf UNI_Ursic_Marko_2009.pdf 1 97D26EB4733D54106265173493184C8F e775e72d1c1599156b684bc6bf716933fd9d200eb5ccf275a10625b0d49e9acb 693d75b5-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/c93ee2ad-f6da-4501-afc6-e5bc6e9fffbd https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132490 Biotehniška fakulteta 0 0 0