Essays about: "UV-ljus"

Showing result 1 - 5 of 28 essays containing the word UV-ljus.

  1. 1. The effect of temperature on the chemical stability of Vitamin C in a cosmetic product – Development of an HPLC-method for quantitative analysis

    University essay from KTH/Tillämpad fysikalisk kemi

    Author : Sofia Thuresson; [2022]
    Keywords : Vitamin C; HPLC; Stability; Degradation; Antioxidant; Vitamin C; HPLC; Stabilitet; Nedbrytning; Antioxidant;

    Abstract : Vitamin C är en populär ingrediens i hudvårdsprodukter, bland annat på grund av dess positiva effekter på kollagen-produktionen i huden och dess antioxidativa egenskaper. Dessvärre är vitamin C en känslig ingrediens som lätt bryts ned av ljus, syre, hög temperatur eller fel pH-värde. READ MORE

  3. 2. UV Curable Polymers for use in Additively Manufactured Energetic Materials

    University essay from KTH/Fiber- och polymerteknologi

    Author : Alexis Delorme; [2022]
    Keywords : Additive manufacturing; 3D printing; UV curing; mechanical properties; solid rocket motor; propellant; polymers; depth of cure; Additiv tillverkning; 3D-utskrift; UV-härdning; mekaniska egenskaper; fast-bränsleraketmotor; drivmedel; polymerer; härdningsdjup;

    Abstract : Fast-bränsle-raketer (SRM) har funnit sin plats i en stor mängd tillämpningar sedan deras framkomst mer än 2000 år sedan. En SRMs prestanda är förutbestämd av geometrin av drivmedelskrutet och är begränsad av gjutningsmetoden, som idag främst används i produktion. READ MORE

  4. 3. Development of an absorption model for gas discharge lamp simulation

    University essay from Malmö universitet/Institutionen för materialvetenskap och tillämpad matematik (MTM)

    Author : Oscar Vigstrand; [2021]
    Keywords : Discharge lamp; Plasma; UV radiation;

    Abstract : Ultraviolet (UV) light has been used for disinfection purposes for over 100 years. Irradiation by UV light is a method to disinfect surfaces in order to prevent microbiological growth. At Tetra Pak this is of great importance as they are manufacturer of filling machines. READ MORE

  5. 4. Individuella skillnader i hägnutnyttjande och solande hos strålsköldpaddor som hålls i grupp

    University essay from SLU/Dept. of Animal Environment and Health

    Author : Johan Deander; [2021]
    Keywords : strålsköldpadda; Astrochelys radiata; hägnutnyttjande; elektivitetsindex; solande; UV-ljus; temperaturreglering; djurpark;

    Abstract : The thermal environment is of great importance to all animals, but even more so for ectothermal species that are dependent on external heat provision. Surrounding temperature can be linked to the behaviour and welfare of the animals and the artificial heat and light sources in captivity must be of high quality to enable physiological function, natural behaviour and good health. READ MORE

  6. 5. The possibilities of recycling wash water at Vidinge

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Julia Mauritzson; [2020]
    Keywords : reuse; treatment; fresh-cut; water engineering; environmental engineering; avloppsteknik; vattenförsörjningsteknik; Technology and Engineering;

    Abstract : Water is a resource of importance and with drier weather around the world, including Swe-den, there is a risk of too low levels of water to satisfy for instance households, animals and industries in the future. Fresh-cut fruit and vegetable industries are water intense and almost all process water is used in the washing process. READ MORE