Sökning: "MMA"

Visar resultat 21 - 25 av 30 avhandlingar innehållade ordet MMA.

  1. 21. Further characterisation and applications of the diffusive gradients in thin films technique : In situ measurements of anions and cations in environmental waters

    Författare :Helene Österlund; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Sammanfattning : As both the toxicity and the mobility of trace elements are related to chemical forms present, robust methods for element speciation analysis are of great interest. During the last 15 years, hundreds of scientific articles have been published on the development and applications of the diffusive gradients in thin films (DGT) passive sampling technique. LÄS MER

  3. 22. Arsenic exposure and early biomarkers of cardiovascular disease and cancer

    Författare :Syeda Shegufta Ameer; Avdelningen för arbets- och miljömedicin; []
    Nyckelord :Cardiovascular disease; DNA methylation; Telomere length; MtDNAcn; Gene expression; Cancer;

    Sammanfattning : AbstractInorganic arsenic exposure through drinking water is a serious public health concern because of its association to cancer and non-cancer diseases. More than one hundred million people world-wide are exposed to elevated levels of arsenic on a regular basis. LÄS MER

  4. 23. Social-ecological performance of collaborative wildlife governance : the case of Swedish moose management

    Författare :Sabrina Dressel; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : Natural resources such as wildlife are part of social-ecological systems, which are characterized by inherent complexity, uncertainty, and changes. Therefore, collaborative, decentralized, and adaptive approaches tend to be preferred in environmental governance. LÄS MER

  5. 24. Exploring bio-based and biodegradable polymers: free-radical polymerization, hydrolysis and applications

    Författare :Maryam Mousa; Eva Malmström; Magnus Jonsson; Anna Larsson Kron; Seema Agarwal; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Bio-based polymers; biodegradation; branched polyesters; thermally expandable microspheres; copolymerization; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Increasing concerns regarding the depletion of fossil-based resources and theaccumulation of plastic waste in the environment have resulted in extensiveresearch aimed at finding more sustainable alternatives to today’s plastics.In this work, bio-based and biodegradable polymers have been synthesizedusing free-radical polymerization in homogeneous and heterogeneoussystems. LÄS MER

  7. 25. Computational analysis and design optimization for acoustic devices

    Författare :Abbas Mousavi; Eddie Wadbro; Martin Berggren; Niels Aage; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Design optimization; computational analysis; viscothermal acoustics; material distribution topology optimization; acoustic black holes; finite element method;

    Sammanfattning : This thesis focuses on material distribution topology optimization for acoustic waveguides. The limitations of the material distribution approach are discussed in the context of acoustic waveguides with extensive viscous and thermal boundary losses. LÄS MER