Sökning: "spectrophotometer"

Visar resultat 1 - 5 av 55 uppsatser innehållade ordet spectrophotometer.

  1. 1. A new generation ofsmart food packaging : A combination of releasing anti-microbial and generation carbon dioxide inmeat packaging

    Master-uppsats, Karlstads universitet

    Författare :samar salahieh; [2023]
    Nyckelord :adsorption isotherms; desorption kinetics; benzoic acid; thymol; modified calcium carbonate; silica gel; carbon dioxide; food pad.; adsorptionsisotermer; desorptionskinetiken; bensoesyra; tymol; modifierat kalciumkarbonat; kisel gel; koldioxid; food pad.;

    Sammanfattning : Abstract Food sustainability depends significantly on packaging since it helps maintainfood safe and fresh throughout its shelf life, resulting in the least amount ofwaste and the least negative environmental impact. The main objective of thisstudy is to determine the adsorbed and released amount of antimicrobial agents(benzoic acid and thymol) on modified calcium carbonate (MCC) by investigating adsorption isotherm at 25°C and desorption kinetics at both 22°C and5°C of anti-microbial to identify potential solutions to enhance the long-termsustainability of fresh products such as meat. LÄS MER

  3. 2. Continuous leaching of phosphorus from sewage sludge ash

    Uppsats för yrkesexamina på grundnivå, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Sofie Göransson; [2022]
    Nyckelord :Ash leaching; Continuous stirred tank reactor; CSTR; Phosphorus recovery; Sewage sludge ash;

    Sammanfattning : The global demand for food is increasing. Different nutrients are used to increase growth in agriculture and are thus essential for the world ́s food supply. An important and common nutrient is phosphorus. It can be mined, in the form of phosphate, from phosphate rock. LÄS MER

  4. 3. Adsorption studier av antimikrobiella komponenter på olika adsorption : Adsorption vid gränssnittet fast/vätska

    Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper (from 2013)

    Författare :Hiam Sukkar; [2022]
    Nyckelord :;

    Sammanfattning : In this study, we examined the effects of temperature, heat treatment which were heated in oven for an hour in 200 ℃, and solvent on the adsorption isotherm for thymol and benzoic acid on the three surfaces (modified calcium carbonate, silica gel, and perlite). For the first effect, the adsorption isotherm for benzoic acid on modified calcium carbonate was determined at temperatures of 25, 35, 45 and 55 ℃ in ethanol solvent. LÄS MER

  5. 4. Prolongation of shelf life of minimally processed spinach by combining vacuum impregnation and electric field treatments

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

    Författare :Sophia Leffler; [2022]
    Nyckelord :spinach; pulsed electric field; moderate electric field; reversible electroporation; vacuum impregnation; shelf life; metabolic activity; respiration; food engineering; Agriculture and Food Sciences;

    Sammanfattning : A continuous growth of the world population raises the importance of preserving food resources while maintaining their nutrient value. Leafy vegetables such as spinach are a food category which decay quickly, and a large amount ends up as food waste. LÄS MER

  7. 5. Metodutveckling och påbörjan till validering med HPLC för formalin

    M1-uppsats, Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Författare :Frida Johansson; Hanne Pettersson; [2022]
    Nyckelord :HPLC; formalin; formaldehyd; metodutveckling; validering; kalibrering;

    Sammanfattning : Formalin är ett ämne som finns naturligt både i naturen och i människokroppen. Formalin syntetiseras i dagsläget industriellt bland annat på grund utav sina goda egenskaper för desinficering. Det används till exempel i autoklaver på sjukhus för sterilisering av verktyg. LÄS MER