Sökning: "particle number size distribution."

Visar resultat 21 - 25 av 37 uppsatser innehållade orden particle number size distribution..

1. 21. Suitability of Spray Dried Powder containing Lipids for Inhalation Formulation based on Fine Particle Fraction and Particle Size Distribution

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Livsmedelsteknik och nutrition (master)

   Författare :Hung Nguyen; [2016]
   Nyckelord :Fine Particle Fraction: Particle Size Distribution; Drying; Inhalation; DPI; Dry Powder Inhaler; Powder; Inhaler; Spray drying; Lipids; Inhalation Formulation; Lysozyme; Pharmaceutical Technology; läkemedelsteknologi; Technology and Engineering;

   Sammanfattning : The aim of this master thesis is to provide an indication of the suitability, or otherwise usage, of spray-drying for production of powder aimed for inhalation formulation and comparing the characteristics of the product, with and without lipids. Lipids have a proven effect of delaying release of active drug substances in the cardiovascular system and pulmonary systemic delivery has a number of advantages, chiefly among them being bypassing the first pass metabolism. LÄS MER

3. 22. Assessment of numerical integration schemes and boundary conditions for Lagrangian tracking of marine debris

   Master-uppsats, Lunds universitet/Matematik LTH

   Författare :Joel Kronborg; [2016]
   Nyckelord :Lagrangian tracking; PARCELS; Runge-Kutta; time stepping; boundary conditions; Mathematics and Statistics;

   Sammanfattning : A growing environmental issue today is the amount plastic pollution in the ocean. To investigate how it might affect marine life, an important aspect is to study how plastics are transported by ocean currents and where it ends up. This can be done by use of Lagrangian simulation of plastic particles in computer ocean models. LÄS MER

4. 23. Spatially varying parameters in observed new particle formation events

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

   Författare :Jimmie Carpman; [2015]
   Nyckelord :Aerosol; aerosols; particle; modeling; new particle formation; NPF; climate; coagulation; dry deposition; CCN; banana; distribution; number size distribution; spatial variation; spatial; Earth and Environmental Sciences;

   Sammanfattning : Aerosol particles affect the global climate due to its influence on the scattering and absorption of short-wave and long-wave radiation. The extent of the influence of aerosol particles on the climate varies a lot by time and space, and needs to be quantified. LÄS MER

5. 24. Rapid soil quality assessment using portable visible near infrared (VNIR) spectroscopy

   Master-uppsats, SLU/Dept. of Soil and Environment

   Författare :Getachew Gemtesa Tiruneh; [2014]
   Nyckelord :visible-near infrared; soil; Ethiopia; PLS; spectroscopy;

   Sammanfattning : Visible-Near Infrared (VNIR) spectroscopy provides rapid, low cost, non-destructive and simultaneous measurements of several constituents from a single scan. The method has recently gained attention as an alternative to conventional soil analytical techniques in soil quality assessment. LÄS MER

7. 25. Investigation of possible non-additive behavior in the formation of secondary organic aerosol from a mixture of anthropogenic and biogenic VOC precursors

   Master-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

   Författare :John Falk; [2014]
   Nyckelord :Volatile organic compounds; Biogenic; Anthropogenic; Secondary organic aerosol; Non-additive; Flow reactor; Scanning Mobility Particle Sizer; Earth and Environmental Sciences;

   Sammanfattning : Secondary organic aerosol (SOA) mass yields were tested for six combinations of two anthropogenic volatile organic compounds (AVOC); m-xylene & toluene, and three biogenic volatile organic compounds (BVOC); α-pinene, myrcene & isoprene. The purpose was to investigate any non-additive results in SOA formation from mixtures of AVOCs and BVOCs by comparing experimental yield with corresponding two-product model yields. LÄS MER