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Vision is the most important tool for flying insects to control their flight behaviour. It is especially important for tropical stingless bees living in a cluttered environment, for example the rainforest, were there vegetation is dense making it difficult to navigate through. Stingless bees posses apposition compound eyes, and there is still only a little information about how volume of different
Nanomedicine is a growing field with great potential. When nanoparticles (NPs) come in contact with biological fluids a protein corona is formed on the surface. The protein corona has an effect on the pharmacokinetics and biological response. This might in turn lead to disadvantageous drug delivery and needs to be addressed when using NPs as drug delivery tools. How to build the protein corona and
The complexity and importance of the eyes of a rather simple organism, the bee, is apparent when looking at the adaptation to their environment. The so called compound eyes consists of multiple facets, each having their own point of view and combined results in a larger image. For being able to study the magnificent eyes on a bee's head, there have been in recent studies an increase by X-ray t
Äggulans komposition av fettsyror påverkar fostrets utveckling och ungens chanser till överlevnad efter kläckning. Detta är en följd av lipidernas roll som anti-inflammatoriska ämnen, energiresurser och nödvändiga komponenter för utveckling av organ och nervsystem. Tidigare studier har visat att kompositionen av fetter påverkas av honans tillgång på dessa fetter i hennes föda, och de ägg som honan
I denna rapport undersöks huruvida hög ålder och stor omkrets på en ek påverkar artrikedomen och antalet signalarter av mossor och lavar som lever på dess stam. Detta är viktigt då information om arters existens och deras eventuella samband med ålder och omkrets på trädet möjliggör för ett framtida skydd av gamla träd och dess arter, särskilt eftersom många mossor och lavar idag riskerar rödlistni
Microplastic particles are of increasing environmental concern around the globe and recent studies have shown that these particles are present in the entire water column, thus affecting a range of zooplankton including copepods that have a vital role in the marine food web. This study investigated whether microplastic beads have an effect in the filtration rate in the copepod Acartia tonsa, which
Genetically modified plants (GM-plants) have been controversial since they began being cultivated, especially within the European Union (EU). It is not well known how their unique properties affect both humans’ health and natural ecosystems and therefore lawmaking in EU has been very restrictive around cultivation of the plants. The AMIGA-project (Assessing and Monitoring the Impacts of Geneticall
Lodging, the tendency in barley to lie down on the ground when exposed to hail and heavy fertilising, is one of the most important traits that barley breeding is trying to remove from the barley cultivars. This may be an even greater challenge when future climate changes may lead to more extreme weather leading to more severe storms with heavy rain and hail. In this project, 8 breviaristatum (ari)
Kunskap om markens uppbyggnad är viktig både för konstruktions och prospekteringsändamål. Geofysiska undersökningsmetoder kan användas för att skapa en överblick att basera vidare undersökningar på. I den här studien används likströms resistivitet och inducerad polarisation, IP. Datan är inverterad med en Cole-Cole modell i programmet ÅrhusInv och använd för att karakterisera berggrunden vid ÖnnesFor both construction and exploration purposes, knowledge of the subsurface is important. Geophysical exploration methods can be used to acquire an overview of an area on which further investigations can be based. In this study direct current resistivity and induced polarization data, inverted with a Cole-Cole model in program AarhusInv, are used to characterize the bedrock at Önneslöv in Scania,
The recent upgrade of the Large Hadron Collider (LHC) benefits searches for new physics phenomena using multijet final states. The increased center-of-mass energy opens new possibilities to probe new physics at scales beyond the Tera-electron volt (TeV), especially in di-jet final states. However, in the sub-TeV mass region, the QCD background to dijet searches is overwhelming and not all events c
Epitaxial lift-off-layers (ELO) were developed in order to create nanowire array membranes, with the intent to pave the way for solar cells in tandem. Ultimately this thesis project focused only on growing and characterizing the ELO layers on (111)B oriented GaAs substrates with MOCVD, as this process step is not thoroughly understood in literature. In this thesis, temperature and V/III ratio de
This thesis work is part of a larger project with final goal to be able to measure the oxygen concentration in the lungs of infants, using non-invasive laser spectroscopy. This thesis is specifically dealing with simulations of light transport through the upper body of infants, as well as constructing a tissue-like model (phantom) that can be used in experiments. The goal is to use these simulatio
Perovskites have proven to have very promising properties applicable in future higher efficient technological devices such as light emitters and solar cells. In further development of perovskite solar cell devices there are however serious material drawbacks such as instability and toxicity, causing the perovskite research community to question if and how these obstacles can be overcome. In this
Bees are mostly diurnal insects and rely on their vision to perform daily tasks. Their apposition compound eyes play a big part in regulating vision. To improve our knowledge of how vision functions, we will observe these apposition compound eyes using micro CT. The aim of this report was to compare two different methods of preparing and scanning the bees. The first method uses resin to embed the
As the most diverse group of animals in the world with more than a million describes species, insects varies in many aspects of their ecology. Bees are insects that can be found in many different habitats across the world. Some live in open landscapes while others live in denser vegetation, some are active in the night while others are active during the day. Since bees use their vision to navigate
Ekosystemtjänster är ett viktigt begrepp för att sprida förståelse om naturens värde för människan och det finns ett flertal kategorier av tjänster som naturen bidrar med. Vissa tjänster är mer aktuella än andra beroende på vilken miljö man fokuserar på, och i detta arbete ligger fokus på att utvärdera reglerande ekosystemtjänster i stadsmiljön då grönytor i dagens städer hotas allt mer och mer av
The language learning process by third age learners has recently become a field of interest for linguistic research. However, it has been studied mostly regarding psychological and cognitive considerations (stress, motivation, attention, memory, etc.), rather than according to language internal factors. The present study aims to provide a contribution by investigating the mastery of Italian gramma
