Sökning: "ultraviolet radiation"

Visar resultat 11 - 15 av 25 uppsatser innehållade orden ultraviolet radiation.

1. 11. Microbial test organisms for sterilization processes in food industry

   Master-uppsats, Lunds universitet/Bioteknik; Lunds universitet/Teknisk mikrobiologi

   Författare :Yasmin Nabila; [2018]
   Nyckelord :Aseptic processing and packaging; validation; test organisms; Aspergillus brasiliensis; Bacillus atrophaeus; Bacillus subtilis; sterilization; disinfection; applied microbiology; teknisk mikrobiologi; Technology and Engineering; Agriculture and Food Sciences;

   Sammanfattning : The importance of sterilization processes has been a major topic in the food manufacturing industry since it preserves the quality and provides longer shelf-life by preventing microbiological recontamination of products. Aseptic packaging is an alternative technique to pack commercially sterile products into containers with a very low recontamination rate, thus, the entire production chain must be designed according to the aseptic condition, including the packaging material, the filling machines, and the surrounding area where the process takes place. LÄS MER

3. 12. Evaluation Analysis of the UV-detector on the Mini-EUSO Space Telescope

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Matej Lukanovic; [2018]
   Nyckelord :Mini-EUSO; EUSO; Space Telescope;

   Sammanfattning : Extragalactic charged particles, each with energies rising up to and beyond 1 Joule, have been studied for almost a century. Yet, no precise evidence have proven to show where they might originate from as their energy levels rise above the current familiar acceleration sources in outer space. LÄS MER

4. 13. Response of Daphnia magna from Natural Populations to Ultraviolet Radiation

   Master-uppsats, Lunds universitet/Examensarbeten i biologi

   Författare :Luo Zheng; [2018]
   Nyckelord :Biology and Life Sciences;

   Sammanfattning : Diel vertical migration (DVM) is performed by various zooplankton taxa. The general movement pattern of DVM has been well studied while the possible clonal differences of this movement largely remain unknown. My master thesis focus on investigating the effects of environmental stressors on Daphnia magna strains isolated from natural populations. LÄS MER

5. 14. The thermal structure of exoplanet atmospheres

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

   Författare :Matthew Agnew; [2015]
   Nyckelord :exoplanet; atmospheres; cold trap; hot jupiter; thermal inversion; thermal structure; Physics and Astronomy;

   Sammanfattning : Context. The discovery of hot Jupiters, giant gas exoplanets on tight orbits close to their host star, has proven instrumental in the study of exoplanet atmospheres through transit spectroscopy. LÄS MER

7. 15. Improvement of Ultraviolet Protection of Polyester Nonwoven -A Study of Volvos Parcel Shelves

   Kandidat-uppsats, Högskolan i Borås/Institutionen Textilhögskolan

   Författare :ELIN LUNDIN; MIKAELA HÄGG TURESSON; [2014]
   Nyckelord :Parcel shelf; ultraviolet radiation; ultraviolet absorbers; ultraviolet absorbers; ultraviolet protection; polyester; nonwoven; disperse dyes.;

   Sammanfattning : The parcel shelf in a car is one of the things that are most exposed to ultraviolet light and heat. The sunlight causes ultraviolet radiation and excessive heat to this area. This can cause the material to degrade, fade or drift in colour. The parcel shelf production is today divided between three producers. LÄS MER