Sökning: "halm"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet halm.

1. 1. Activity concentrations of radionuclides in energy production from peat, wood chips and straw

   Författare :Robert Hedvall; Kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Radionuclides; peat; wood; chips; straw; bioenergy; biomass; district heating; emission; Cs; Physics; Chernobyl; Radioactivity; Fysik; Technological sciences; Teknik; Fysicumarkivet A:1997:Hedvall;

   Sammanfattning : In this thesis quantitative analyses of radionuclide concentrations in bioenergy fuels such as peat, wood chips and straw are presented. For comparison a brief description is included of radionuclide concentrations and radiation doses from other sources of power and also from some industrial applications. LÄS MER

3. 2. Manufacture of straw MDF and fibreboards

   Författare :Sören Halvarsson; Håkan Edlund; Magnus Norgren; Thomas Amidon; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rice; Wheat; Straw; MDF; HDF; UF; MUF; MDI; Non-resin; binderless MDF; Ash; Silicon; SEM; Hot-pressing; MOR; MOE; IB; Thickness swelling; MDF properties; fibre swelling; WRV; Refining; Defibration.; NATURAL SCIENCES; NATURVETENSKAP; Chemical engineering; Kemiteknik; Chemical process and manufacturing engineering; Kemisk process- och produktionsteknik;

   Sammanfattning : The purpose of this thesis was to develop an economical, sustainable, and environmentally friendly straw Medium Density Fibreboard (MDF) process, capable of full-scale manufacturing and to produce MDF of requested quality. The investigated straw was based on wheat (Triticum aestivum L.) and rice (Oryzae sativa L.). LÄS MER

4. 3. Gasification of biochars: Evolution of pore structure, effects of alkalis and alkali release

   Författare :Saiman Ding; Klas Engvall; Efthymios Kantarelis; Jukka Konttinen; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gasification; alkali release; kinetic modelling; char reactivity; pore structure; alkalis effects; förgasning; frigörande av alkalier; kinetisk modellering; kolreaktivitet; porstruktur; alkalieffekter; Chemical Engineering; Kemiteknik;

   Sammanfattning : Renewable energy sources are indispensable to meet the rising demand of energy usage  while  reducing  the  negative  environmental  impact  of utilising fossil  fuels. Gasification  is  an  efficient  technology  to  convert  biogenic waste  into  valuable gaseous products. LÄS MER

5. 4. Anaerobic digestion of horse manure : renewable energy and plant nutrients in a systems perspective

   Författare :Åsa Hadin; Ola Eriksson; Karl Hillman; Nils Ryrholm; Högskolan i Gävle; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Horse manure; horse keeping; anaerobic digestion; nutrient recycling; systems perspective; bedding; methane potential; feedstock; biogas; biofertilizer; Hästgödsel; hästhållning; rötning; näringsåterföring; systemperspektiv; strömaterial; metanpotential; biogassubstrat; biogas; biogödsel;

   Sammanfattning : In horse keeping horse manure is produced, which can be utilized as a fertilizer or considered a waste. Horse manure constitutes a resource in terms of both plant nutrients and energy. In addition energy policies and objectives aim at replacing fossil fuels with renewable energy sources. LÄS MER

7. 5. "Wahrscheinlich sollte man reden miteinander" : Die narrativen Modi als Mittel der Gestaltung von Ehe und Beziehungsproblemen in Martin Walsers Novelle "Ein fliehendes Pferd"

   Författare :Bärbel Westphal; Dieter Krohn; Jochen Vogt; Dieter Vogt; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; German language; marriage; narratology; free indirect discourse; point of view; narrative frames; Martin Walser; Ein fliehendes Pferd; Tyska; German language; Tyska språket; Germanic languages; German;

   Sammanfattning : This thesis is centrally concerned both to investigate the depiction of marriage and relation-ship problems in Martin Walser's 'Ein fliehendes Pferd' ('A Runaway Horse') while at the same time giving a careful account of narrative techniques (notably free indirect discourse) and shedding light on their function. In terms of method, the two-fold aim entails on the one hand a thoroughgoing examination of prior material on the novella and on the other a critical discussion of certain defining models of narrative theory – whereby concepts such as narra-tive situation, modus, perspective and focalization are subjected to fresh scrutiny. LÄS MER