Sökning: "chemical cluster"

Visar resultat 1 - 5 av 32 uppsatser innehållade orden chemical cluster.

1. 1. Finding new members of the VelHel-4 stream

   Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

   Författare :Lucas Johansson; [2023]
   Nyckelord :Galactic Archaeology; Milky Way; Stellar Streams; Streams; Stellar Halo; Stars; Globular Cluster; Astronomy; Astrophysics; Gaia; Chemical Abundance; Spectroscopy;

   Sammanfattning : According to the paradigm of lambda-CDM cosmology, the stellar halo ofour Galaxy has been built-up over time through the accretion of other galaxiesand star clusters. The remnants of some of these are still observable today asstellar streams, but are typically very faint and difficult to resolve amidst the farmore numerous foreground Milky Way stars. LÄS MER

3. 2. Lithium abundances through distinct stellar populations in Omega Centauri

   Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

   Författare :Brais Gesto Herrera; [2023]
   Nyckelord :;

   Sammanfattning : The renowned Omega Centauri (NGC 5139) is one of the most massive and complex known globular clusters in terms of multiple populations. In this project, we aim to investigate the chemical abundance of lithium in RBG stars in this cluster in pursuit of unraveling the that govern the formation of these distinct populations. LÄS MER

4. 3. Production of succinic acid by Actinobacillus succinogenes in attached-growth bioreactors and dynamic modelling of biofilm formation

   Master-uppsats, Lunds universitet/Teknisk mikrobiologi

   Författare :Henrik Östberg; [2023]
   Nyckelord :Actinobacillus succinogenes; Succinic acid; Biofilm; Attached-growth bioreactor; Dynamic modelling; Cell cultivation; Applied microbiology; Biology and Life Sciences;

   Sammanfattning : Actinobacillus succinogenes is a microorganism is a very efficient producer of succinic acid, a chemical with a wide range of industrial applications. The bacterium is prone to form biofilm, a flocculation of cells attached to a surface. LÄS MER

5. 4. Quantum chemical studies of the reactivity of gold nanoparticles towards molecular radicals

   Master-uppsats, KTH/Kemi

   Författare :Sofia Larsson; [2022]
   Nyckelord :gold nanoparticles; surface electrostatic potential; average local ionization energy; electron attachment energy; free molecular radicals; guldnanopartiklar; elektrostatisk ytpotential; genomsnittlig lokal joniseringsenergi; fria molekylära radikaler;

   Sammanfattning : Kvantkemiska studier av reaktiviteten hos guldnanopartiklar Au3-Au11 och Au13 mot O- centrerade molekylradikaler OH , OOH , OCH3   och H2O undersöks. Olika molekylära ytegenskaper tas med i beräkningen, elektrostatiska ytpotentialen, den genomsnittliga lokala joniseringsenergin, electron attachment energy och spinndensiteten (VS(r), IS(r), TS(r), ES(r) och S(r)). LÄS MER

7. 5. Application of data-driven models in exploring cyanobacterial bloom risks in Lake Mälaren

   Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

   Författare :Abigail Huertas Herrera; [2021]
   Nyckelord :Random Forest; blue-green algae; WHO Alert Level Framework; drinking water supply; cyanobacterial blooms;

   Sammanfattning : Cyanobacteria are a unique organism, a bacterium that develop photosynthesis, thus it contains chlorophyll, a pigment commonly associated to algae. For this reason, cyanobacteria are also known as blue-green algae. One of the secondary metabolites of cyanobacteria is cyanotoxin, a substance which is hepatoxic, neurotoxic, and dermatoxic. LÄS MER