Sökning: "Pulsed electric fields"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Pulsed electric fields.

1. 1. RF Compressor (SLED) Phase-Modulation to Reduce Peak Fields in the MAX IV Linear Accelerator

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Joel Ekström; [2023]
   Nyckelord :Accelerator; MAX IV; LINAC; Phase-modulation; SLED; Pulse compression; Technology and Engineering;

   Sammanfattning : Modern particle accelerators need strong electric fields in order to produce high energy particles. Such high voltages are typically reached by injecting pulsed radio frequency power through several steps of amplification. At the end, pulse compression is used to further improve the energy gain at the cost of pulse-length. LÄS MER

3. 2. Machine Concept for Pulsed Electric Field Treatment of Leafy Products

   Master-uppsats, Lunds universitet/Innovation

   Författare :Patrik Johansson; [2022]
   Nyckelord :Product development; Opticept; PEF; Leafy Products; Prototyping; Technology and Engineering;

   Sammanfattning : This master thesis, executed in collaboration with Opticept Technologies, has the purpose of developing a machine concept that enables the treatment of leafy products with Pulsed Electric Fields (PEF). PEF is an emerging technology within the food industry that works by changing the cell membrane structure of food products by exposing them to high-voltage electric fields. LÄS MER

4. 3. Effects of Vacuum Impregnation with Various Substances in Combination with Pulsed Electric Field to Improve the Freezing Tolerance of Arugula Leaves

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

   Författare :George Lukhava; [2021]
   Nyckelord :Food Engineering; Food Preservation; Pulsed Electric Fields; PEF; Vacuum Impregnation; VI; Arugula; Cryoptrotectant; Glycerol; Secondary Metabolites; Folic Acid; Folate; Folacin; Vitamin B1; Thiamine; Thiamin; Agriculture and Food Sciences;

   Sammanfattning : As of 2020 an estimated number of 821 million people across the world are undernourished and that figure is expected to grow by 2 billion before the end of 2050 (United Nations Sustainable Development 2020). Despite this, every year over 1/3 of food produced globally is disposed of without consumption (Global Panel on Agriculture and Food Systems for Nutrition 2018), and the actual number might be much higher. LÄS MER

5. 4. Pulse Electric Field as a Pre-treatment Method of Wastewater Sludge prior to Anaerobic Digestion

   Master-uppsats, Lunds universitet/Kemiteknik (CI)

   Författare :Milton Matilde; [2020]
   Nyckelord :PEF; AD; biogas yield; sludge pre-treatment; water engineering; environmental engineering; avloppsteknik; vattenförsörjningsteknik; Technology and Engineering;

   Sammanfattning : This work analyzed the impact caused by different intensities of Pulsed Electric Fields (PEF) pre-treatment on the biogas production from small-scale anaerobic digesters of wastewater sludge under thermophilic conditions. PEF technology consists of passing the substrate through an electric field which generates a potential difference across the cells, resulting in electroporation. LÄS MER

7. 5. 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