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Visar resultat 1 - 5 av 89 uppsatser som matchar ovanstående sökkriterier.

  1. 1. The potential nitrous oxide emissions in a permanent grassland chronosequence

    Kandidat-uppsats, SLU/Dept. of Forest Mycology and Plant Pathology

    Författare :Sandra Lillsjö Kronblad; [2023]
    Nyckelord :nitrous oxide emission; permanent grasslands; denitrification; nitrous; reen house gas; agriculture;

    Sammanfattning : As a part of a larger project (Belowground biodiversity of grasslands – conservation needs and potential to promote sustainable agriculture), this study aims to investigate potential nitrous oxide (N2O) emissions and microbial gene abundances needed for the production (nirS and nirK) and reduction (nosZI and nosZII) of nitrous oxide in soil of permanent grasslands of various age. Thegrasslands have at different times been converted to permanent grasslands and are of interest because of the possibility to shed more light about the passage of time’s affects on the soil microbialcommunities and their activity. LÄS MER

  3. 2. Bedömning av gasproduktion i returfiber : En studie för att utvärdera alternativ för att inhibera gasproduktionen inom pappersmassaindustrin

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Viktor Forsmark; [2023]
    Nyckelord :Tannins; Lactobacillus; Pulp production; biocide; gas inhibition;

    Sammanfattning : In the pulp production industry one potential problem is the production of gas from microbial activity in the storage tank. If left unchecked such gas production can in extreme cases lead to an explosion. To prevent any such event the current method of maintaining microbial activity in pulp plants is to use hazardous biocides. LÄS MER

  4. 3. REINDEER GRAZING IN A NORTHERN BOREAL FOREST : Seasonal and reindeer-induced changes in nutrient availability and soil temperature

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Agnes Karlsson; [2023]
    Nyckelord :nutrient availability; soil temperature; reindeer grazing; seasonal nutrient cycling; boreal forest;

    Sammanfattning : Soil nutrient availability is a key component to understanding the boreal ecosystems, as it directly relates to plant productivity and ecosystem diversity. There is however little known about how the nutrient availability changes seasonally in the boreal forest. LÄS MER

  5. 4. Newly inundated forest landscapes - hotspots for mercury in water and benthic fauna

    Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Kirstine Evald Andersson; [2023]
    Nyckelord :Wetland restoration; Inundation; Mercury cycling; Beaver impoundments; Aquatic biogeochemis-try;

    Sammanfattning : Mercury (Hg) is a widespread contaminant in high-latitude aquatic ecosystems, where it can undergo microbial transfor-mation into toxic methylmercury (MeHg). Due to its chemical properties, MeHg tends to accumulate in the aquatic food chain and will eventually end up in predatory species at the top of the terrestrial food web. LÄS MER

  7. 5. The Production and Characteristics of an Orange Fleshed Sweet Potato Yogurt

    Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)

    Författare :Ariam Kunfu; [2023]
    Nyckelord :Sweet potato; fermentation; Ghana; yogurt; L. bulgaricus; S. thermophilus; food technology and nutrition; Agriculture and Food Sciences;

    Sammanfattning : Yogurt is an ancient food, used for a better preservation of milk. Milk gets fermented by Streptococcus thermophilicus and Lactobacillus bulgaricus (lactic acid bacteria, LAB) which converts the lactose present in the milk to lactic acid. These probiotics support the microbial population balance of the gastrointestinal tract. LÄS MER