Sökning: "grey mould"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden grey mould.

1. 1. Preharvest Conditions Affecting Apple Quality, Antioxidant Responses and Susceptibility to the Infection by Grey mould (Botrytis cinerea)

   Författare :Tuyet Bui Thi Anh; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Malus x domestica; grey mould; preharvest weather; apples’ quality; antioxidants; harvest year;

   Sammanfattning : Apple fruits are rich in vitamin C and other antioxidants, which are beneficial for human health. During postharvest storage, there are losses as a result of diseases such as grey mould, caused by the fungus Botrytis cinerea. The present work has investigated how to obtain a high quality of apples, allowing long-term storage. LÄS MER

3. 2. Factors Related to the Formation of Gas Porosity in Grey Cast Iron: Investigation of Core Gas Evolution and Gas Concentrations in Molten Iron

   Författare :Jessica Orlenius; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; core binders; Gas porosity; hydrogen; grey iron; gas absorption; nitrogen; oxygen; gas evolution rate; green sand; mould filling; gas volume; gas solubility;

   Sammanfattning : Since gas porosity is a major casting problem, it is of greatest importance to increase the knowledge about the foundry process in order to minimise the presence of gas porosity and thereby improving the casting quality. Gas porosity is generally considered to originate from gases precipitated during solidification of iron and from entrained gas picked up by the metal during the mould filling. LÄS MER

4. 3. On microstructure formation and mechanical properties in grey cast iron

   Författare :Attila Diószegi; Preben N. Hansén; Linköpings universitet; []
   Nyckelord :grey iron; nucleation; primary austenite; eutectic cell; growth rate; inoculation; thermal analysis; TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : A major user of cast components is the automotive industry, where the functionality of the components is related to environmental demands. Internal combustion engines are constantly being improved to emit less pollution. A vital part in this development is to increase the material properties of engine components during their life cycle. LÄS MER

5. 4. Factors Influencing the Formation of Shrinkage Porosity in Grey Cast Iron

   Författare :Lennart Elmquist; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CET; Oxygen; Columnar zone; Grey iron; Shrinkage porosity; Equiaxed zone; Solidification; DAAS; Hydrogen; Primary austenite;

   Sammanfattning : The presence of shrinkage defects is of major concern in the production of grey iron castings. This type of defect can penetrate through the casting as a three-dimensional network. LÄS MER

7. 5. Metal Expansion Penetration During Solidification of Grey Cast Iron

   Författare :Izudin Dugic; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Grey cast iron; solidification; solidification modelling; graphite expansion; molar volume; casting simulation; thennal analysis; thermoanalysis cup; casting temperature; inoculation; inoculant; meta! expansion penetration; eutectic cell size.; TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : The meta! expansion penetration has been examined experimentally. The whole casting process was simulated using a commercial software, in order to investigate the solidification characteristics and the pore formation in the casting studied. LÄS MER