Sökning: "antioxidants"

Visar resultat 11 - 15 av 181 avhandlingar innehållade ordet antioxidants.

1. 11. Pressurised Fluid Extraction of Bioactive Species in Tree Barks : Analysis using Hyphenated Electrochemical Mass Spectrometric Detection

   Författare :Michelle Co; Charlotta Turner; Per J.R Sjöberg; Kari Hartonen; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pressurised fluid extraction; antioxidants; DPPH; water; ethanol; antioxidant activity; antioxidant capacity; electrochemial detection; mass spektrometry; Chemistry; Kemi; Analytical Chemistry; Analytisk kemi;

   Sammanfattning : Analytical chemistry has developed throughout time to meet current needs. At present, the interest in biorefinery is growing, due to environmental awareness and the depletion of fossil resources. Biomass from agricultural and forestry industries has proven to be excellent raw material for different processes. LÄS MER

3. 12. Congenital malformations in experimental diabetic pregnancy : Aetiology and antioxidative treatment

   Författare :Martin Simán; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cell biology; Diabetes; pregnancy; teratology; malformations; embryo; fetus; cataract; sorbitol; antioxidants; butylated hydroxytoluene; vitamin E; vitamin C; TBARS; neural crest cells; Cellbiologi; Cell biology; Cellbiologi; medicinsk cellbiologi; Medical Cell Biology;

   Sammanfattning : Diabetes mellitus in pregnancy causes congenital malformations in the offspring.The aim of this work was to characterize biochemical and morphologic anomaliesin the conceptus of an animal model of diabetic pregnancy. In addition, apreventive treatment against diabetes-induced dysmorphogenesis was developed. LÄS MER

4. 13. Consumption and loss of commercial stabilisers in polyethylene exposed to different natural environments

   Författare :Nadejzda Haider; KTH; []
   Nyckelord :LDPE; MDPE; ultrasonic extraction; polymer additives; stabilisers; antioxidants; HALS; Irganox 1010; Irgafos 168; migration; consumption; GC-MS; additive degradation products;

   Sammanfattning : A procedure for the extraction and analysis of commercialstabilisers in low density and medium density polyethylene(LDPE and MDPE) films was developed and used to study theconsumption of stabilisers in polymers exposed to differentnatural environments. An ultrasonic technique was applied toextract HALS-3 (Chimassorb 944) from LDPE film and antioxidants(Irganox 1010 and Irgafos 168) from MDPE film. LÄS MER

5. 14. Exploring Novel Catalytic Chalcogenide Antioxidants

   Författare :Henrik Johansson; Lars Engman; Helena Grennberg; Troels Skrydstrup; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; antioxidant; tellurium; selenium; catalytic; toxicity; ROS; neutrophil; glutathione peroxidase mimic; macrophage.; Organic chemistry; Organisk kemi; Kemi med inriktning mot organisk kemi; Chemistry with specialization in Organic Chemistry;

   Sammanfattning : This thesis is concerned with the synthesis and evaluation of regenerable chalcogen containing antioxidants. Variously substituted 2,3-dihydrobenzo[b]selenophene-5-ol antioxidants were evaluated in order to gain information about structure/reactivity-relationships. LÄS MER

7. 15. Preharvest Conditions Affecting Apple Quality, Antioxidant Responses and Susceptibility to the Infection by Grey mould (Botrytis cinerea)

   Författare :Tuyet Bui Thi Anh; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Malus x domestica; grey mould; preharvest weather; apples’ quality; antioxidants; harvest year;

   Sammanfattning : Apple fruits are rich in vitamin C and other antioxidants, which are beneficial for human health. During postharvest storage, there are losses as a result of diseases such as grey mould, caused by the fungus Botrytis cinerea. The present work has investigated how to obtain a high quality of apples, allowing long-term storage. LÄS MER