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Showing result 1 - 5 of 15 essays matching the above criteria.

  1. 1. Perfluorooctane sulfonate (PFOS) and related chemicals in eggs from Sweden and China

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Yasmin Karimi; [2019]
    Keywords : PFOS; PFOA; Chicken Egg; LC-MS MS; Organic egg; Conventional egg;

    Abstract : Dietary intake is one of the major routes of human exposure to perfluoroalkyl and/or polyfluoroalkyl substances (PFAS). The objective of this study was to measure perfluorooctane sulfonic acid (PFOS), perfluorooctanoic acid (PFOA) and perfluorohexane sulfonic acid (PFHxS) in organic and conventional egg from Sweden (n=8, consisted of 4 pooled eggs and 4 individuals) and China (n=9, consisted of 4 pooled eggs and 5 individuals) and compare the concentrations of PFAS between the two categories (organic and conventional). READ MORE

  2. 2. Feeding the 45 million : substituting soybean protein with insect protein within EU poultry and egg production

    University essay from SLU/Dept. of Ecology

    Author : Douglas Hunter; [2019]
    Keywords : insects; insect production; livestock feed; entomophagy; land use; futures research; food security; energy security; black soldier fly; mealworm; house cricket; sustainable development;

    Abstract : A global population increasing both in number and in resource consumption per capita has resulted in food, livestock feed and energy crop demands that are increasingly difficult to meet on rapidly degrading soils within a diminishing available area of arable land. With further expansion of agricultural land infeasible and yield increases through further intensification insufficient to meet the scale of predicted crop demand, the use of insects as an animal feed has gained traction as a method of not only reducing competition for arable land, but also some of the detrimental environmental consequences of livestock and conventional feed production. READ MORE

  3. 3. Search for High-Mass Dijet Resonances Decaying into Top Quark Pairs using Machine Learning Techniques in the ATLAS Experiment

    University essay from Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

    Author : Stefio Yosse Andrean; [2018]
    Keywords : ATLAS; LHC; jet; dijet; resonance; top; machine learning; BDT; DNN; topocluster; Physics and Astronomy;

    Abstract : This thesis presents an application of machine learning techniques in a search for a high-mass resonance particle decaying into top quark pairs in high energy dijet events using the ATLAS experiment at the Large Hadron Collider. Top tagging is applied to the dijet events to select the events with top signature and suppress the background, increasing the sensitivity of the search. READ MORE

  4. 4. Vilka ägg ska man köpa – en guide för den medvetne konsumenten : – en guide för den medvetne konsumenten

    University essay from SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Author : Kajsa Witthuhn; [2018]
    Keywords : värphöns; inhysningssystem; ägg; välfärd; miljö; hållbarhet;

    Abstract : I dagens samhälle ställs vi inför allt fler val i livsmedelsaffären. Ett exempel på detta är valet av ägg, ett livsmedel som ökar i popularitet globalt. I EU finns fyra olika inhysningssystem för värphöns; inredd bur, frigående inomhus, frigående med tillgång till utevistelse och höns inom ekologisk produktion. READ MORE

  5. 5. Potentiella källor till dioxiner och dioxinliknande PCB i ekologiska ägg

    University essay from SLU/Dept. of Animal Nutrition and Management

    Author : Martina Lundin; [2017]
    Keywords : dioxiner; dioxinliknande polyklorerade bifenyler; ekologiska ägg; persistenta organiska föroreningar; dl-PCB; PCDD; PCDF; TCDD;

    Abstract : Livsmedelsverket utförde en studie 2003 med syfte att undersöka halter av dioxiner och dioxinliknande Polyklorerade Bifenyler (PCB) i ekologiska och konventionella ägg. Förhöjda halter av dioxiner och dioxinliknande PCB (dl-PCB) påträffades i ekologiska ägg och gemensamt för de ägg med förhöjda halter var att värphönsen utfodrats med en fodertyp som innehöll fiskmjöl. READ MORE