Sökning: "dry air"

Visar resultat 16 - 20 av 158 avhandlingar innehållade orden dry air.

1. 16. Exposure to household air pollution among women and children in Ethiopia: Socio-cultural factors and the association with airway health

   Författare :Mulugeta Tamire; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Household air pollution; Solid fuel use; Streptococcus pneumoniae; Particulate matter; socio-cultural barriers; Ethiopia;

   Sammanfattning : Abstract Using solid fuel generates emissions of many health-damaging pollutants including inhalable fine particulate matter (PM2.5). Such exposure is known to cause morbidity and mortality in low- and middle-income countries, including Ethiopia, where solid fuel, mainly wood, is a primary source of energy. LÄS MER

3. 17. Disperson and Flocculation in a Dry Mat-Forming Process

   Författare :Robert Rundqvist; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The absorption cores in disposable nappies, incontinence pads and female hygiene products are manufactured by a dry mat-forming process. Cellulose fibers and super-absorbing particles are suspended in air and blown onto a forming wheel on which the cores are formed. LÄS MER

4. 18. Urban Climate and Air Pollution in Ouagadougou, Burkina Faso

   Författare :Jenny Lindén; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sub-Saharan Africa; Sahel; semi arid; nocturnal cooling; urban vegetation; evening evaporative cooling; cooling rate; atmospheric stability; thermal wind; carbon monoxide; particulate matter; road dust; exposure differences;

   Sammanfattning : ABSTRACT Africa has recently been singled out by UN Habitat as the fastest urbanizing continent in the world. The most extreme case was found in the Sahelian city of Ouagadougou, Burkina Faso, where the population is expected to almost double over the next ten years. LÄS MER

5. 19. Emissions, dynamics and dispersion of particles in polluted air

   Författare :Lars Gidhagen; Hans-Christen Hansson; Christer Johansson; Joakim Langner; Øystein Hov; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Meteorology; Meteorologi;

   Sammanfattning : The main objective of this thesis is to yield information on how atmospheric fine and ultrafine particles are dispersed in populated areas. Quantitative information on emissions, transport and removal is needed to assess the health risks of inhalable particles. LÄS MER

7. 20. Modification of fluff pulp fibres: Cross-linking and alkali extraction

   Författare :Kristoffer Lund; Chalmers tekniska högskola; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; fibre network; dry defibration; network strength; fluff pulp; Absorption; cross-linking; alkali extraction; kraft pulp;

   Sammanfattning : Fluff pulp has been one of the key components of hygienic products, such as diapers, for many years. Fluff pulp is dry defibrated and air-laid into the absorption core of diapers. The introduction of superabsorbent polymers (SAPs) in the 1980s decreased the dependence on fluff pulp, as the SAPs became the main absorbing material. LÄS MER