Search for dissertations about: "essential oil composition"

Showing result 1 - 5 of 16 swedish dissertations containing the words essential oil composition.

2. 1. Possibilities to Utilize Species from the Mozambican Forest Biomass for the Production of Essential Oils : Study of Eucalyptus and Pinus Species and Application of Citronellal as Raw Material for Flavour Chemistry

   Author : Felisberto P. Pagula; KTH; []
   Keywords : Eucalyptus species; essential oil composition; citronellal; hydroxycitronellal;

   Abstract : This thesis deals partly with the isolation and chemicalanalysis of essential oils from selected Eucalyptus and Pinusspecies grown in Mozambique, and partly with the synthesis ofmore valuable compounds from citronellal isolated fromEucalyptus citriodora Hook oil.More than 60 constituents in the volatile oils wereidentified by gas chromatography and gas chromatography-massspectrometry by comparison with authentic substances andliterature data. READ MORE

4. 2. On the Extraction of Essential Oils by Supercritical Carbon Dioxide and its Influence on the Mesomorphic Phase Structures

   Author : José da Cruz Francisco; Kemiska institutionen; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Natural oils; fats and waxes technology; Naturliga oljor; fetter; vax; Kemiteknik och kemisk teknologi; Chemical technology and engineering; Livsmedelsteknik; Food and drink technology; phase behavior; soybean lecithin; monoolein; cineole; terpenes; eucalyptus; extraction; Essential oils; supercritical carbon dioxide;

   Abstract : A comparison of essential oils from leaves of Eucalyptus camaldulensis Dehn. obtained by hydrodistillation (HD) and supercritical carbon dioxide (SC-CO2) extraction is presented. Selected major components of the oils showed a predominance of higher molecular weight components in the SC-CO2 extracts than in those obtained by HD. READ MORE

5. 3. Plants as Sources of Natural and Effective Acaricides : Against Ixodes ricinus  (Acari: Ixodidae)

   Author : Fawzeia Elmhalli; Giulio Grandi; Richard Wall; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acaricidal; Ixodes ricinus; Libyan plants; essential oils; Plant-derived acaricides.; Biology with specialization in Systematics; Biologi med inriktning mot systematik;

   Abstract : Ticks and tick-borne diseases are major health hazards worldwide, with increasing numbers of cases of Lyme disease and tick-borne encephalitis reported yearly. Meanwhile, concerns about the environmental impact and safety of chemical acaricides are driving research into alternative control methods, such as plant-based acaricides. READ MORE

6. 4. The specificities of plant enzymes and their effects on the seed oil quality

   Author : Simon Jeppsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Abstract : Triacylglycerols, glycerides with three fatty acids, are the chemical constituent of seed oils. The fatty acid composition determines the chemical and physical characteristics of an oil. Conventional vegetable oils contain a few reoccurring fatty acids, but plants can produce several hundreds of different fatty acids. READ MORE

7. 5. The impact of macronutritional composition and ketosis on cognitive health : from normal aging to Alzheimer’s disease

   Author : Jakob Norgren; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : Ketogenic diets (KD) are increasingly investigated for the prevention of cognitive decline and Alzheimer’s disease (AD). Without explicitly investigating a KD, this thesis disentangles two of its hallmarks: a reduced dietary carbohydrate/fat-ratio (CFr) and the metabolic state ketosis. READ MORE