Sökning: "control of particle size"

Visar resultat 1 - 5 av 107 avhandlingar innehållade orden control of particle size.

  1. 1. Spray drying of particles intended for inhalation - Investigation of significant process variables and product characteristics, with focus on degradation and solid state properties

    Detta är en avhandling från Dept. of Pharmaceutics, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, DK-21 00 Copenhagen, Denmark

    Författare :Kristina Mosén; Lund University.; Lunds universitet.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Läkemedelsteknik och relaterad teknik; Pharmaceutical and related technologies; carbohydrate; insulin; process conditions; crystallinity; degradation; particle size; spray drying; inhalation;

    Sammanfattning : The interest in spray drying for production of inhalable particles has grown considerably since the late 1980s. However, which process variables that control degradation and the solid state properties have not been subject to extensive research. This thesis deals with how important characteristics of inhalation particles can be controlled, i.e. LÄS MER

  2. 2. Numerical computations of wind turbine wakes and wake interaction Optimization and control

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Karl Nilsson; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Actuator disc method; Actuator line method; Blade element momentum method; Wind turbine wake; Wake interaction; CFD; LES; EllipSys3D;

    Sammanfattning : In the present thesis the wake flow behind wind turbines is analyzed numerically using large-eddy simulations. The wind turbine rotors are modeled by using either the actuator disc method or the actuator line method in which the blades are represented by body forces computed with airfoil data. LÄS MER

  3. 3. Studies of aerosol particle formation from various sources using ion and electron beam analytical techniques

    Detta är en avhandling från LUND UNIVERSITY Lund Institute of Technology, Department of Physics, Division of Nuclear Physics, Box. 118, SE-22100 Lund, Sweden

    Författare :Arash Gharibi; Lund University.; Lunds universitet.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; GUPIX; TEM; SEM; EDX; biomass combustion; traffic; road; jet droplets; film droplets; Physics; Nuclear physics; Fysik; Kärnfysik; pollution control; Environmental technology; Aerosol particles; PIXE; sources emission; tire; Arctic; Miljöteknik; kontroll av utsläpp; Fysicumarkivet A:000;

    Sammanfattning : The thesis presents the results of studies of aerosol particle formation using ion and electron beam analytical techniques. The sources of aerosol particle formation studied are the following: 1. production of primary aerosol particles in the high Arctic region during summers 2. LÄS MER

  4. 4. A Study of Factors Affecting the Particle Size for Water Atomised Metal Powders

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Fredrik Persson; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; water atomisation; metal powders; particle size; modelling; viscosity; surface tension;

    Sammanfattning : The production of metal powders by water atomisation is a well established process, which can be used to produce a wide range of particle sizes. A careful control of the particle size distribution is necessary, to atomise powders with a high quality and at a low production cost. LÄS MER

  5. 5. Preparation of Pharmaceutical Powders using Supercritical Fluid Technology Pharmaceutical Applications and Physicochemical Characterisation of Powders

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Sitaram P. Velaga; Uppsala universitet.; [2004]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; PHARMACY Pharmaceutics; FARMACI Galenisk farmaci; Pharmaceutics; Supercritical fluid; Gas Anti-Solvent; SEDS; Crystallisation; Particle design; Polymorphs; Dry powder inhalation; Solid-state behaviour; Therapeutic proteins; Precipitation; Stability; Recombinant human growth hormone hGH ; Galenisk farmaci;

    Sammanfattning : The main aim of the thesis was to explore the potential of supercritical fluid (SF) techniques in the field of drug delivery. In particular, the relatively recently developed solution-enhanced dispersion by supercritical fluids (SEDS) technology has been employed in the preparation of particles/powders. LÄS MER