20.500.12556/RUL-158874 Učinkovitost pripravkov na osnovi borove kisline in kvartarnih amonijevih spojin na glive modrivke in plesni diplomsko delo - univerzitetni študij Efficacy of preservative solution based on boric acid and quternary amonium compounds against blue stain fungi and moulds graduation thesis - university studies Borove spojine so že v majhnih koncentracijah učinkoviti biocidi. Njihova velika prednost pred ostalimi aktivnimi učinkovinami je, da so okolju neškodljive. Njihova slabost je, da se iz lesa lahko izpirajo, zato smo njihovo vezavo izboljšali s kvartarnimi amonijevimi spojinami in etanolaminom. Naš namen je bil, da določimo minimalno inhibitorno koncentracijo na glive modrivke in plesni. Uspešnost delovanja posamezne raztopine pripravka smo določali s pomočjo standarda SIST EN 152-1 (1996). Testirali smo različne kombinacije aktivnih učinkovin: borove kisline, etanolamina, kvartarne amonijeve spojine in zmes vseh treh pripravkov (EABQ). Laboratorijski vzorci so bili pripravljeni iz lesa bora predpisanih dimenzij in oblik, terenski vzorci so bili izdelani iz sveže smrekovine. Spoznali smo, da se uspešnost delovanja pripravkov pri našem poizkusu povečuje z naraščanjem koncentracije biocidnih učinkovin v pripravku. Test smo izvajali tudi na terenu in tako poizkus poizkušali približati dejanskemu problemu modrenja in razraščanja plesni med transportom in skladiščenjem lesa. Rezultati terenskega in laboratorijskega testa so se po pričakovanjih zaradi dejavnikov okolja na terenu razlikovali. Boron compounds are effective biocides in rather low concentrations. Boron is considered as environmentally friendly preservative. However, its key disadvantage is, that they can be leached from wood in wet conditions. Therefore, boron fixation was improved with quaternary ammonium compounds and ethanolamine. Our aim was to determine the minimum inhibitory concentration of different combinations of active ingredients: boric acid, ethanolamine, quaternary ammonium compounds, and a mixture of all three preparations (EABQ) against mold and blue%stain fungi. Performance of respective aqueous solutions was determined according to EN 152-1 (1996) standard. Laboratory samples were made of Scots pine sapwood in prescribed dimensions and shape. On the other hand, field test samples were prepared from fresh spruce wood. The results clearly indicates, that the efficacy of the products increases along with thin creasing concentration of active ingredients in the solution. The test was also carried out in the field test site, in order to elucidate the problem of staining fungi during timber shipping and storage. As expected, the results of field and laboratory tests differed due to environmental factors on the field. lesne glive modrenje zaščita lesa borove spojine plesni blue staining fungi wood ihabiting fungi wood preservation boron compounds moulds true false false M. Dolenc Slovenski jezik Angleški jezik Diplomsko delo 2024-06-21 12:03:49 2024-06-21 12:03:52 2024-07-05 03:44:31 0000-00-00 00:00:00 2016 0 Ljubljana 2016 Ljubljana IX, 37 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*84 2634889 UNI_Dolenc_Matej_2016.pdf UNI_Dolenc_Matej_2016.pdf 1 1EE361F704B5A18BAAACFAF06BD1B4B9 070c939377e41df9d0de5bf566debcf21309bfed9749b6ec4ac1f501767f47d1 8feba9fb-2fb5-11ef-a25b-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186603 Biotehniška fakulteta 0 0 0