Sökning: "microbial activity"
Visar resultat 1 - 5 av 89 uppsatser innehållade orden microbial activity.
1. The potential nitrous oxide emissions in a permanent grassland chronosequence
Kandidat-uppsats, SLU/Dept. of Forest Mycology and Plant PathologySammanfattning : 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
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 geovetenskapSammanfattning : 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
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 geovetenskapSammanfattning : 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
4. Newly inundated forest landscapes - hotspots for mercury in water and benthic fauna
Master-uppsats, SLU/Dept. of Aquatic Sciences and AssessmentSammanfattning : 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
5. The Production and Characteristics of an Orange Fleshed Sweet Potato Yogurt
Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)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