Search for dissertations about: "tef"

Showing result 1 - 5 of 8 swedish dissertations containing the word tef.

  2. 1. Rainfall variability, soils and land use changes in the Ethiopian highlands

    Author : Staffan Rosell; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; rainfall change; soil productivity; tef; land-use changes; South Wollo; water harvesting;

    Abstract : Most farmers in the Ethiopian highlands are dependent on rain-fed agriculture. The indigenous cereal tef is the most important crop for the farmers in the highlands. The central highland is an environmentally fragile area and a marginal area of Ethiopia with a recurring problem for the farmers to sustain an adequate agricultural production. READ MORE

  4. 2. Liver tumour promoting effects by polychlorinated biphenyls

    Author : Marie Haag Grönlund; Karolinska Institutet; Karolinska Institutet; []
    Keywords : tumour promotion; altered hepatic foci; rat liver; PCB; potency; TEF; interactions; antagonism; biologically based cancer growth models; TCDD;

    Abstract : PCBs cause a number of toxic effects and are present in a variety of biological samples including fish, meat and diary products. Cancer is a serious toxic effect by PCBs that has been observed in animal experiments but the knowledge about PCB induced carcinogenicity is still scarce. READ MORE

  5. 3. Cumulative assessment of persistent organic pollutant toxicity in vivo

    Author : Emma Westerholm; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Humans are continuously exposed to a multitude of compounds present in the environment and in food. A major challenge in risk assessment is to determine the degree of exposure to multiple chemicals and the hazards associated with such combined exposure. READ MORE

  6. 4. Mechanistical studies on gap junctions and their role in tumour promotion : structure-activity relationships of polychlorinated biphelyls

    Author : Yvonne Bager; Karolinska Institutet; Karolinska Institutet; []
    Keywords : gap junctional intercellular communication; phosphorylation; tumour promotion; alteredhepatic foci; rat liver; potency; PCBs; TCDD.Doctoral Thesis Yvonne Bager;

    Abstract : Chemically induced carcinogenesis is a multi-stage process that can be divided into at least three major stages, initiation, promotion and progression. The promotion stage involves clonal expansion of genetically altered cells (i.e. initiated cells). READ MORE

  7. 5. Computational methods for analyzing dioxin-like compounds and identifying potential aryl hydrocarbon receptor ligands : multivariate studies based on human and rodent in vitro data

    Author : Malin Larsson; Patrik Andersson; Anna Linusson; Mats Tysklind; Scott Boyer; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; dioxin-like compounds; multivariate analysis; toxic equivalency factor; quantitative structure-activity relationship; descriptors; virtual screening; in vitro; species variation; aryl hydrocarbon receptor;

    Abstract : Polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) are omnipresent and persistent environmental pollutants. In particular, 29 congeners are of special concern, and these are usually referred to as dioxin-like compounds (DLCs). READ MORE