Sökning: "particle number size distribution."

Visar resultat 6 - 10 av 37 uppsatser innehållade orden particle number size distribution..

1. 6. Fragmentation in graupel snow collisions

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Martanda Gautam; [2022]
   Nyckelord :Ecosystem Analysis; Clouds; Snow; Graupel; SIP; Fragmentation; CKE; Rime Fraction; Earth and Environmental Sciences;

   Sammanfattning : Aircraft observations of precipitating clouds with cloud top temperatures higher than -38°C have revealed that Secondary Ice Production (SIP) is responsible for presence of majority of ice particles. One such SIP mechanism is fragmentation via collisions between ice particles. LÄS MER

3. 7. Comparing different methods of measuring particle size for pharmaceutical excipients

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

   Författare :Jiawen Wang; [2022]
   Nyckelord :particle size; comparison; Malvern analysis; Qicpic analysis; Pharmaceutical technology; Technology and Engineering;

   Sammanfattning : In pharmaceutical science, particle size is one of the most fundamental parameters of materials, but different particle-sizing analysis methods lack a uniform standard for measuring irregular particle size, making it difficult to compare the accuracy and applicability of different particle-sizing analysis methods. Experiments on excipients used in pharmaceuticals are carried out in this paper by laser diffraction analysis (Malvern wet and dry), dynamic image analysis (Qicpic), and microscopic methods (Qicpic, SEM, and light microscopy) to determine the applicability and limitations of each method, as well as to clarify their advantages and disadvantages. LÄS MER

4. 8. Atmospheric Attenuation for Lidar Systems in Adverse Weather Conditions

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

   Författare :Johan Viklund; [2021]
   Nyckelord :Lidar; Lidar equation; Extinction coefficient; Signal attenuation;

   Sammanfattning : In this study, the weather impact on lidar signals has been researched. A lidar system was placed with a target at approximately 90 m and has together with a weather station collected data for about a year before this study. LÄS MER

5. 9. The Aerosol-Chase Project. A continental Lagrangian experiment.

   Master-uppsats, Lunds universitet/Kärnfysik

   Författare :Adrian Reyes Martin; [2021]
   Nyckelord :Science General; Earth and Environmental Sciences; Technology and Engineering; Physics and Astronomy;

   Sammanfattning : Determining how aerosol particle number size distributions evolve during long range transport and how aerosol sources contribute to the aerosol population is one of the greatest conundrums in aerosol science. Current monitoring of particle size distribution is done in fixed stations that provide limited information about the reasons why size distribution changes with time. LÄS MER

7. 10. Development and examination of liquid plant-based young child formulae

   Master-uppsats, Lunds universitet/Innovation

   Författare :Irineos Georgiou; [2021]
   Nyckelord :Technology and Engineering;

   Sammanfattning : This study evaluated the pilot-scale rapid-prototyping development of liquid plant-based young child formulae, by exploring different sources of proteins, carbohydrates, lipids, and flavours. The study was undertaken in collaboration with an industrial partner thus confidential information was blinded. LÄS MER