Sökning: "vacuum impregnation"

Visar resultat 6 - 10 av 12 uppsatser innehållade orden vacuum impregnation.

1. 6. Application of pulsed electric fields and vacuum impregnation to improve the freezing tolerance of fresh Origanum vulgare leaves

   Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)

   Författare :Iliana Karasa; [2018]
   Nyckelord :Oregano leaves; Freezing; Freezing tolerance; Pretreatments; Vacuum Impregnation; Pulsed electric fields; food engineering; livsmedelsteknik; Agriculture and Food Sciences; Technology and Engineering;

   Sammanfattning : One of most ancient food preservation methods is freezing because there are not caused significant changes the sensory characteristics and nutritional value of foods. Last decade, have been made great steps for the optimization of freezing tolerance of fresh vegetables, fruits and species. LÄS MER

3. 7. Study of the effect of vacuum impregnation with different substances on respiration and color of packed baby spinach leaves.

   Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)

   Författare :Ahmad Husain; [2017]
   Nyckelord :modified atmosphere; Spinach; minimal processing; metabolic activity; quality; GABA.; Agriculture and Food Sciences;

   Sammanfattning : In this study, vacuum impregnation (VI) was used to investigate the effect of different solutions: sucrose 21 % (w/v), calcium lactate 1 % (w/v), ascorbic acid 0.1 % (w/v), and GABA 0.075 % (w/v) on atmospheric composition, color, and shelf life of packed baby spinach leaves. VI was performed at two different temperatures: 21 C and 7. LÄS MER

4. 8. The use of cryoprotectants in unrooted cuttings of Pelargonium zonale, in order to increase their life expectancy

   Kandidat-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

   Författare :Maria Hellström; [2017]
   Nyckelord :cryoprotectants; mother plants; Pelargonium cuttings; pulsed electric fields; vacuum impregnation; unrooted;

   Sammanfattning : The rooting capacity of an unrooted Pelargonium zonale cutting decreases immensely 96 hours after being cut. The aim of this paper was to evaluate if two different cryoprotectants, 25% glucose and 30% trehalose, with the help of vacuum impregnation and pulse electric fields could result in an increase in the life expectancy of these cuttings. LÄS MER

5. 9. Preparation and evaluation of sulfided NiMo/γ-Al2O3 hydrotreating catalysts

   Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

   Författare :ALI KAMYAB; [2016]
   Nyckelord :NiMo catalyst; hydrotreating; phosphorous; catalysis; preparation;

   Sammanfattning :   Four nickel-molybdenum catalysts were synthesized on gamma alumina with higher surface area and on NiMo catalyst was prepared using gamma alumina with lower surface area. Catalysts with higher-surface-area support were prepared by co-impregnation, sequential impregnation and adding phosphorous. Theses catalysts were calcined at 500  ͦC. LÄS MER

7. 10. Fabrication of a light-weight SOFC using ceramic fibre paper as substrate

   Master-uppsats, Lunds universitet/Centrum för analys och syntes

   Författare :Philip Löfkvist; [2015]
   Nyckelord :inorganic chemistry; solid oxide fuel cell; unmanned aerial vehicle; high temperature heat treatment; yttria stabilized zirconia; ceramic fibre paper; catator; nickel oxide; impregnation; paste manufacturing; ultra-sonication; ball-milling; optical microscopy; materials chemistry; scanning electron microscopy; materialkemi; Technology and Engineering;

   Sammanfattning : A novel method for the fabrication of a light-weight solid oxide fuel cell (SOFC) has been evaluated at Catator. This was conducted in order to lower the weight and thus cost of an unmanned aerial vehicle. The main aim for this thesis was to achieve a thin, dense and crack-free electrolyte using a ceramic fibre paper as substrate. LÄS MER