Search for dissertations about: "onion"

Showing result 1 - 5 of 17 swedish dissertations containing the word onion.

  2. 1. Enzymatic hydrolysis coupled to hot water extraction for determination of flavonoids in plants

    Author : Sofia Lindahl; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; extraction; flavonoids; quercetin; biocatalysis; beta-glucosidase; sustainable chemistry; hyphenation; molecularly imprinted polymers; onion;

    Abstract : The word sustainability is more and more frequently used within the field of chemistry and in many other fields. Green or sustainable chemistry was introduced during the 90 ́s as a field of chemistry where the environmental and health impacts of processes and products are evaluated and improved. READ MORE

  4. 2. Pulsed Electric Field Treatment of Plant Tissue

    Author : Mustafa Fincan; Livsmedelsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bimodal Fickian diffusion model; Food and drink technology; Livsmedelsteknik; generalized Maxwell model; onion Neutral Red; visualization; red beetroot; potato; epidermis; plant tissue; electroporation; Cell permeabilization; Pulsed electric field; PEF;

    Abstract : A pulsed electric field (PEF) is a newly emerged non-thermal food processing technology which has characteristic effects on the cell membrane. PEF processing involves subjecting food to short, repeated pulses of a high electric field between an anode and a cathode. READ MORE

  5. 3. Exploring layers of factors for farmers' adoption of ecological approaches

    Author : Gaëlle Leduc; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Abstract : This thesis investigates different “layers” of factors for farmers’ adoption of ecological approaches, namely, individual, social and material layers of factors, with a mixed research methods approach. These layers of factors can be conceptualized using an onion as a metaphor, as factors influencing farmers’ behaviour can originate from the individual core, from the social environment or material environment, representing different layers in the onion. READ MORE

  6. 4. Molecular development of a thermostable β-glucosidase for modification of natural products

    Author : Sami Khan; Bioteknik; []
    Keywords : Thermotoga neapolitana; TnBgl1A; Mutagenesis; Flavonoid; Quercetin; Immobilisation; Chaperones;

    Abstract : The gene encoding a β-glucosidase originating from the extreme thermophile Thermotoga neopolitana has been cloned and expressed in Escherichia coli. The aim was to produce a thermostable enzyme that could be used to remove sugar residues from glucosylated natural products classified as flavonoids by applying a method combining extraction in hot pressurized water with enzymatic hydrolysis. READ MORE

  7. 5. Analysis of Acrylamide and Anthocyanins in Foods : Extraction Optimization for Challenging Analytes

    Author : Erik V. Petersson; Charlotta Turner; Johan Rosén; Rolf Danielsson; Marja-Liisa Riekkola; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Analysis; Extraction; Optimization; Acrylamide; Anthocyanins; Foods; Challenges; Analytical chemistry; Analytisk kemi; Analytical Chemistry; Analytisk kemi;

    Abstract : In this thesis, the main concern has been to improve the reliability of different parts of the analytical workflow (Paper I, II, IV &V). Additionally, one of the resulting optimized methods was used in a real application (Paper III). Paper I-II concerned the extraction of acrylamide (AA) from foods. READ MORE