Sökning: "SN"

Visar resultat 1 - 5 av 225 avhandlingar innehållade ordet SN.

1. 1. Observations of unusual Type II supernovae

   Författare :Francesco Taddia; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supernova; SN 2006V; SN 2006au; SN 2005ip; SN 2006jd; Astronomy; astronomi;

   Sammanfattning : .... LÄS MER

3. 2. Looking for the high-mass progenitors of stripped-envelope supernovae

   Författare :Emir Karamehmetoglu; Jesper Sollerman; Francesco Taddia; Punam Chandra; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supernova; Supernovae; Stripped-envelope supernovae; SN Type Ibc; SN; SNe; SN progenitor; Type Ibn; Astronomy; astronomi;

   Sammanfattning : Stripped-envelope supernovae were thought to be the explosions of very massive stars (& 20 M) that lost their outer layers of hydrogen and/or helium in strong stellar winds. However, recent studies have highlighted that most stripped-envelope supernovae seem to be arising from rela- tively lower-mass progenitor stars in the 12 20 M(sun) range, creating a mystery about the fate of the higher-mass stars. LÄS MER

4. 3. Bumpy light curves of interacting supernovae

   Författare :Anders Nyholm; Jesper Sollerman; Peter Lundqvist; Nils Ryde; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; iPTF13z; supernova; SN; circumstellar medium; CSM; SN Type IIn; intermediate Palomar Transient Factory; iPTF; Astronomy; astronomi;

   Sammanfattning : A supernova (SN) is the explosive destruction of a star. Via a luminous outpouring of radiation, the SN can rival the brightness of its SN host galaxy for months or years. LÄS MER

5. 4. Geochemistry of tin, tungsten and molybdenum in Swedish Proterozoic granitoids : its potential use in regional mineral exploration

   Författare :Karl-Magnus Drake; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Granitoid; lithogeochemistry; Sn; W; Mo; Li; geotectonic - chronologic subdivision; geochemical-statistical grouping; uni- and multivariate statistical analysis; computer programs; metallogenic element distributions; Sn-W-concentration patterns; ore-bearing potential; probability calculations; petrometallogenic element ratios; petrochemical trends; postmagmatic alterations; geochemical variability; normative composition; genesis; absolute age; bibliography; analysis databank; Proterozoic; Sweden; N5600 N6800 E2330 E1120;

   Sammanfattning : The primary aim of this broad regional study is to statistically determine the Li-Sn-W-Mo-bearing potential of various granitoids using geochemical criteria.Computer-based, univariate and multivariate statistical methods are applied to major and trace element data from ca 660 granitic rock samples and over 800 major element analyses, selected from the Swedish geological literature. LÄS MER

7. 5. Molecular Studies of Irradiation and SN-38 on Colorectal Cancer

   Författare :Åsa Wallin; Xiao-Feng Sun; Joar Svanvik; Peter Naredi; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Colorectal cancer CRC ; molecular changes; SN-38; Oncology; Onkologi;

   Sammanfattning : Colorectal cancer (CRC) is one of most common cancer diseases worldwide. In Swedenapproximately 5,000 new cases of CRC are generated each year, which makes it the thirdmost common cancer disease among both men and women. The past decades ofimproved treatment strategies have considerably increased the five-year survival for CRCpatients. LÄS MER