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Uporabnost lesnih ostankov tujerodnih invazivnih drevesnih vrst za proizvodnjo peletov
Les Pub Date : 2021-06-08 DOI: 10.26614/les-wood.2021.v70n01a04
Dominika Gornik Bučar, Peter Prislan, Pavel Smolnikar, Darja Stare, Nike Krajnc, Bojan Gospodarič
{"title":"Uporabnost lesnih ostankov tujerodnih invazivnih drevesnih vrst za proizvodnjo peletov","authors":"Dominika Gornik Bučar, Peter Prislan, Pavel Smolnikar, Darja Stare, Nike Krajnc, Bojan Gospodarič","doi":"10.26614/les-wood.2021.v70n01a04","DOIUrl":"https://doi.org/10.26614/les-wood.2021.v70n01a04","url":null,"abstract":"Na laboratorijski peletirni napravi smo izdelali pelete iz petih izbranih tujerodnih invazivnih drevesnih vrst, ki rastejo na območju Slovenije in sicer: divjega kostanja (Aesculus hippocastanum), amerikanskega javora (Acer negundo), robinije (Robinia pseudoacacia), trnate gledičevke (Gleditsia triacanthos) in velikega pajesena (Ailanthus altissima) ter mešanic surovine omenjenih tujerodnih invazivnih vrst s smrekovino (Picea abies) v razmerjih 70 : 30 in 50 : 50. Pod enakimi proizvodnimi pogoji smo skupno izdelali 15 različnih vrst peletov. Izdelanim peletom smo določili pomembnejše fizikalne in mehanske lastnosti (vsebnost vode, gostoto nasutja, mehansko obstojnost in vsebnost pepela). Rezultate smo primerjali z mejnimi vrednostmi, opredeljenimi v standardu SIST EN ISO 17225-2:2014. Vsebnost vode in gostota nasutja vseh izdelanih vrst peletov sta zadostili zahtevam standarda za razvrstitev v najvišji kakovostni razred A1. Mehanske obstojnosti izdelanih peletov niso dosegale zahtev standarda in niso presegale 96,5 % (kar je mejna vrednost za B razred). Rezultati kažejo, da imajo med izbranimi tujerodnimi invazivnimi drevesnimi vrstami največji potencial za nadaljnjo optimizacijo peletirnega postopka robinija, trnata gledičevka in visoki pajesen.","PeriodicalId":52851,"journal":{"name":"Les","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42672542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood 热改性木耳木的化学和力学特性
Les Pub Date : 2021-05-13 DOI: 10.26614/LES-WOOD.2021.V70N01A02
M. A. Minkah, K. A. Afrifah, D. C. Batista, H. Militz
{"title":"Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood","authors":"M. A. Minkah, K. A. Afrifah, D. C. Batista, H. Militz","doi":"10.26614/LES-WOOD.2021.V70N01A02","DOIUrl":"https://doi.org/10.26614/LES-WOOD.2021.V70N01A02","url":null,"abstract":"Gmelina arborea (Roxb. ex. Sm.) wood samples were thermally modified at 180 °C, 200 °C and 220 °C for 3 h, by employing a process similar to ThermoWood®. The resulting effects on the basic chemical composition and mechanical properties were determined. The results were analyzed statistically with ANOVA, and Least Square Deviation was used to compare means. Generally, after the thermal modification (TM) process, the cellulose, hemicelluloses and extractives content decreased significantly. By contrast, lignin proportions increased significantly. Untreated wood and samples modified at 180 °C indicated comparable modulus of elasticity (MOE), modulus of rupture (MOR), degree of integrity (I), fine fraction (F) and resistance to impact milling (RIM). Noteworthy reductions however occurred at 200 °C and 220 °C. Significant increases in Brinell hardness (BH) took place at 180 °C, recording a high decrease at 220 °C. Gmelina arborea could be modified suitably at 180 °C for structural and other purposes. To take advantage of other improved properties, modification at 200 °C could be employed for non-structural uses. \u0000 ","PeriodicalId":52851,"journal":{"name":"Les","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42381016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Traite et esclavage dans l’enseignement de l’histoire à l’école élémentaire depuis 1945 自1945年以来，小学历史教学中的奴隶贸易
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0045
B. Falaize
{"title":"Traite et esclavage dans l’enseignement de l’histoire à l’école élémentaire depuis 1945","authors":"B. Falaize","doi":"10.3917/kart.desu.2021.01.0045","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0045","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74564889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Préface. Du commerce triangulaire au crime contre l’humanité : l’enseignement du fait esclavagiste en France 前言。从三角贸易到反人类罪:法国的奴隶教育
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0005
J. Hébrard
{"title":"Préface. Du commerce triangulaire au crime contre l’humanité : l’enseignement du fait esclavagiste en France","authors":"J. Hébrard","doi":"10.3917/kart.desu.2021.01.0005","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0005","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82479229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Empires africains et traites négrières médiévales en classe de 5e en France : une ouverture ambiguë ? 非洲帝国和中世纪奴隶条约在法国五年级:一个模糊的开端?
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0201
Marie-Albane de Suremain
{"title":"Empires africains et traites négrières médiévales en classe de 5e en France : une ouverture ambiguë ?","authors":"Marie-Albane de Suremain","doi":"10.3917/kart.desu.2021.01.0201","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0201","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78735769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
L’esclavage au xviiie siècle, entre la morale et la loi: une décennie d’éducation civique en Seconde de lycée général 18世纪的奴隶制，道德与法律之间:普通高中二年级公民教育十年
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0075
Jean-Louis Donnadieu
{"title":"L’esclavage au xviiie siècle, entre la morale et la loi: une décennie d’éducation civique en Seconde de lycée général","authors":"Jean-Louis Donnadieu","doi":"10.3917/kart.desu.2021.01.0075","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0075","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86003579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Une fresque À la mémoire des esclaves 一幅纪念奴隶的壁画
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0097
Constance Lagrange, K. Chabane
{"title":"Une fresque À la mémoire des esclaves","authors":"Constance Lagrange, K. Chabane","doi":"10.3917/kart.desu.2021.01.0097","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0097","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76928970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Entre choix du passé et poids du présent 在过去的选择和现在的重量之间
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0275
S. Ledoux
{"title":"Entre choix du passé et poids du présent","authors":"S. Ledoux","doi":"10.3917/kart.desu.2021.01.0275","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0275","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85302972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enseigner l’histoire des traites négrières et de l’esclavage colonial à des élèves de cours moyen 向中学学生讲授奴隶贸易和殖民奴隶制的历史
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0033
Delphine Leneveut
{"title":"Enseigner l’histoire des traites négrières et de l’esclavage colonial à des élèves de cours moyen","authors":"Delphine Leneveut","doi":"10.3917/kart.desu.2021.01.0033","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0033","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84898635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Le passé oublié 被遗忘的过去
Les Pub Date : 2021-01-21 DOI: 10.3917/kart.desu.2021.01.0163
Filipa Ribeiro Da Silva
{"title":"Le passé oublié","authors":"Filipa Ribeiro Da Silva","doi":"10.3917/kart.desu.2021.01.0163","DOIUrl":"https://doi.org/10.3917/kart.desu.2021.01.0163","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87338267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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