Sökning: "Johan Pettersson"

Hittade 4 avhandlingar innehållade orden Johan Pettersson.

  1. 1. Flow and Mixing of Pulp Suspensions

    Författare :Johan Pettersson; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; flow behaviour; boundary-layer; Medium Consistency MC ; mixing; yield stress; suspension; pulp; Laser Doppler Anemometry LDA ; turbulence; fibre;

    Sammanfattning : When producing pulp and paper, pulp suspensions are treated in a number of unit operations at medium consistency (MC) concentrations (3-15% by weight). Pulp suspensions at these concentrations behave as solids at low shear rates, but at sufficiently high shear rates they start to flow and can even be made to act as water. LÄS MER

  2. 2. New concepts and techniques for quantification and trace analysis by gas chromatography

    Detta är en avhandling från Kemi

    Författare :Johan Pettersson; KTH.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; quantitative accuracy; calibration; extenal standards; valume contraction; molar excess volume; Kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Sammanfattning : In the first part of this thesis, strategies for avoiding systematic errors when quantifying the main components in mixtures of solvents has been developed (paper I). It is shown that variations in density caused by variations in sample composition and/or volume contraction need to be taken into account. In this way, quantification can be improved. LÄS MER

  3. 3. Dissertatio gradualis de indispensabilitate legis naturæ, exemplis scripturæ sacræ non adversa, quam ... præside, ... Johanne Ihre, ... publice examinandam modeste proponit Abraham Pettersson. Verb. Div. Min. In Auditorio Carol. Maj. d. XIII Junii, anno MDCCXLVII. Horis ante meridiem solitis

    Detta är en avhandling från Holmiæ, Typis Laurentii Salvii

    Författare :Johan Ihre; Uppsala universitet.; [1747]

    Sammanfattning : .... LÄS MER

  4. 4. Dissertatio medica de angina arthritica. qvam venia ... med. ord. Ups. præside Joh. Gust. Acrel ... pro gradu doctoris publice ventilandam sistit Laurentius Sante Pettersson, Smolandus. In auditorio Gust. maj. d. I. Maji MDCCXCIII. Horis a. et p. meridiem solitis

    Detta är en avhandling från Upsaliæ, litteris viduæ direct. Joh. Edman

    Författare :Johan Gustaf Acrel; Uppsala universitet.; [1793]

    Sammanfattning : .... LÄS MER