Sökning: "antioxidant properties"

Visar resultat 11 - 15 av 77 avhandlingar innehållade orden antioxidant properties.

1. 11. Selenium Compounds and Antioxidant Capacity in Bovine Milk. Studies on Glutathione Peroxidase, Bioavailability and Electrochemical Techniques

   Författare :Jun Chen; Kemiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; General biomedical sciences; Biomedicinska vetenskaper allmänt ; Kemiteknik och kemisk teknologi; Chemical technology and engineering; Livsmedelsteknik; Food and drink technology; amperometry; voltammetry; antioxidant capacity; ileostomy; bioavailability; glutathione peroxidase; bovine milk; selenium;

   Sammanfattning : The efficacy and function of antioxidants have been intensively studied in foods and other biological systems in recent decades. This thesis concerns different aspects of the antioxidant properties of bovine milk, with emphasis on measurement of the total antioxidant capacity (TAC), the activity of the selenium-containing glutathione peroxidase (GSHPx), and the bioavailability of selenium from bovine milk in humans. LÄS MER

3. 12. Regeneration of the antioxidant ubiquinol by flavoenzymes and the role of antioxidant defence in experimental hepatocarcinogenesis

   Författare :Ling Xia; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : In the environment, to which we have adapted and thrive, we are constantly exposed to reactive molecules with the potential to cause intracellular damage and cellular malfunction. One of the molecules that is transformed to very reactive free radicals is oxygen that can give rise to a variety of reactive oxygen species formed in close vicinity to sensitive structures in different compartments of the cell. LÄS MER

4. 13. Synthesis, properties and applications of chalcogen-containing antioxidants

   Författare :Jonas Malmström; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; Chemistry; Kemi; organisk kemi; Organic Chemistry;

   Sammanfattning : In the first part, the preparation and properties of chalcogen-containing vitamin E analogues are described. The sulfur compound 3,3,4,6,7-pentamethyl-2,3-dihydrobenzo[b]thiophene-5-ol was prepared by two different routes using ionic and radical chemistry. Interesting rearrangements were observed in the two synthetic pathways. LÄS MER

5. 14. Development of biocatalytic processes for selective antioxidant production

   Författare :Io Antonopoulou; Paul Christakopoulos; Ulrika Rova; Evangelos Topakas; Anne S. Meyer; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biokemisk processteknik; Biochemical Process Engineering;

   Sammanfattning : Feruloyl esterases (FAEs, EC 3.1.1.73) represent a subclass of carboxylic acid esterases that under normal conditions catalyze the hydrolysis of the ester bond between hydroxycinnamic acids (ferulic acid, sinapic acid, caffeic acid, p-coumaric acid) and sugar residues in plant cell walls. LÄS MER

7. 15. Alpha-1-microglobulin, heme-binding protein, reductase and antioxidant

   Författare :Maria Allhorn; Infektionsmedicin; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; reduction; inflammation; chronic ulcers; collagen; low density lipoproteins; Medicin människa och djur ; Medicine human and vertebrates ; antioxidation; heme; hemoglobin; alpha-1-microglobulin; lipocalin;

   Sammanfattning : This thesis describes structural and functional studies of alpha-1-microglobulin (a1m), a 26 kDa plasma and tissue protein that is evolutionarily well-conserved and belongs to the lipocalin superfamily. The lipocalins are polypeptides of 160-190-amino acids that are folded into an 8-stranded beta-barrel forming a pocket with a hydrophobic interior. LÄS MER