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Vår hud är hem för en stor grupp av mikroorganismer, hudens mikroflora, som påverkar vår hälsa och vårt välbefinnande. Ändå finns det många aspekter av detta ämne som ännu är outforskade. Detta projekt syftade till att optimera en metod för analys av hudens mikroflora och effekten av hudvårdsprodukter på hudens mikroflora, från provtagning och provberedning till analys med kvantitativ polymeraskedOur skin is home to a vast community of microorganisms, the skin micro flora, which affect our health and well-being. Yet, there are many aspects of this topic that are still unexplored. This project aimed to optimize a method for analysis of the skin micro flora and the effect of skin care products on the skin micro flora, from sampling and sample preparation to analysis with quantitative polymer

We investigate to what degree return on technology stocks are affected by industry-, country- and global factors. Furthermore, the analysis is extended to look deeper into the industry factors by examining what the exposure of technology stocks to industry-specific shocks is caused by. In previous studies, the aim has been to try to determine whether industry-, country- or global effects are the m

This paper examines the properties of the two recent structural break unit root tests developed in Harvey, Leybourne and Taylor (2013) and Narayan and Popp (2010). The properties are investigated by Monte Carlo simulations in an environment where two trend breaks of small to large magnitudes are present. We find that the Harvey, Leybourne and Taylor (2013) test has superior size and power properti

Globally, 500 million smallholder farmers require finance to secure a more productive, efficient, sustainable, and inclusive food system. Thus far, traditional financial services have been unsuccessful in reaching these farmers. Yet, mobile money services are proposed as a potential tool for enabling smallholder farmers access to financial services. Nonetheless, this proposed impact of mobile mone

Supply chain management (SCM) has become more challenging than ever, considering the effect of globalization on organizations as operating through transnational business networks. Conventional supply chains have been facing struggles such as lack of advanced technologies and traceability in operation, which then leads to operational inefficiencies. Blockchain (BC) technology offers a set of featur

The vehicle industry is making great strides in electric and hybrid technologies, representing a significant step towards reducing emissions from personal vehicles. In order to make the transition to new hybrid technologies as convincing as possible, well-functioning and smooth transitions between traditional combustion engines and electric motors are required. So-called mild hybrids enable a cos

Thesis purpose The purpose of our thesis is to explore how and why consumers with low prior knowledge educate themselves about sports supplements and what effect gender has. Methodology Our research derives from a pragmatic orientation. We conducted a multi-method qualitative study, combining observations and interviews in order to explore and understand the online customer journeys of consumers

The world continues to be shaped by crises in both new and familiar forms. International and non-international armed conflicts and disasters are barriers to individual wellbeing, development, stability, and in the case of the former, represent a basic challenge to peace. The aftermath of such crises, in which communities can be rebuilt and the fabric of society can be mended, can be a time for rec

Poly-3-D-hydroxybutyrate (PHB) is a biopolymer naturally produced by a range of bacterial species. PHB production both from glucose and xylose has also been enabled by engineering the robust baker’s yeast Saccharomyces cerevisiae, however yields remain low. In the present study, additional modifications were carried out in S. cerevisiae strains already expressing functional enzymatic pathways for

In today's society, much energy is used and all energy use (e.g. heat, electricity) affects the environment. Greenhouse gas emissions from energy affect the climate of the earth and increase the natural greenhouse effect. Environmental impact because of energy use causes both local and global problems. Efficient energy use in buildings is a prerequisite for dealing with climate issues and in t

Arbetsrelaterade skador orsakar personligt lidande och ekonomiska förluster för både företag och privatpersoner. Repetitivt arbete och statiska arbetsställningar med armarna kan leda till belastningsskador i axel- och halsregionen. Detta examensarbete har haft som syfte att utveckla ett mjukt bärbart robotsystem med Bioservo Technologies Soft Extra Muscle (SEM) teknik, som ska ge assistans vid lyfWork related injuries causes personal suffering and economic loss for both companies and individuals. Repetitive work and static postures with the arms can lead to musculoskeletal disorders (MSD) in the shoulder and neck region. This thesis set out to develop a wearable soft robotic arm lifting system using Bioservo Technologies’ Soft Extra Muscle (SEM) technology. The objective was to develop a f

Väpnade konflikter är komplexa och mångfacetterade – män och kvinnors roller och nivå av inblandning varier avsevärt. Med detta i åtanke är det nödvändigt för internationell rätt och dess utövare att erbjuda ett reellt skydd, där ansvarsutkrävande och upprättelse erbjuds på lika villkor för alla oavsett kön. Risken är annars att vissa grupper osynliggörs. Sammanfattningsvis krävs det en nyanserad

En två-kolonn MCSGP process för upprening av Liraglutid genomfördes i laboratorieskala. Den här processen är inte en kommersiell uppreningsprocess, utan att den är ett modellsystem med en realistisk peptidblandning och med en icke-kommersiell harts. Först modellerades processen med en konvektiv dispersiv modell för att beskriva koncentrationen genom kolonnen och den steriska massaktionsmodellen föA twin-column MCSGP process for the purification of Liraglutide was implemented at lab scale. This process is not a commercial separation step, but it is a model system with a realistic peptide mixture and with a non-commercial resin. First, the process was modeled using a convective dispersive model to describe the concentration along the column and the steric mass action model to describe the ad

This master’s thesis report describes the development of a new system for control and monitoring of a helium liquefaction plant which has been carried out at Kryolab, Lund University. At the plant, helium gas is purified and then cooled in several steps until it condensates. The plant is very similar to the ones constructed today, but Kryolab wished to replace the outdated control system. The new

A model of the Swedish power plant Mälardalen Energi, developed by Solvina AB was simulated in Dymola with different types of control strategies in order to evaluate if they could improve the operational flexibility of the plant and, thus, its ability to deliver frequency control to the Swedish power grid. Several different control strategies and process modifications were tested and compared to p

In order to transform the fossil fuel dependent transport sector the promotion of biofuels has been crucial in the European Union’s transition towards climate neutrality. To ensure the sustainability of biofuels the European Commission published a Delegated Act on March 13th 2019, proposing the gradual phase-out of high emitting biofuels that may cause indirect land use change (ILUC) – one of them

The Light Dark Matter Experiment (LDMX) is a fixed target experiment that will search for dark matter, but is still in the development phase. An important aspect for the experiment is the discrimination of signal and background events. Here this signal and background discrimination is inspected using a machine learning technique called a Boosted Decision Tree (BDT). This is done using Monte Carlo

This thesis set out to continue the development of a short-wave infrared (SWIR) optical parametric amplifier (OPA). The system is based on a Yb-ber chirped pulse amplification (CPA) laser delivering 400 fs long pulses, centered around 1030 nm, at 200 kHz repetition rate and 40 W average power. The thesis focuses on pulse characterization, through use of frequency-resolved optical gating (FROG), of

Cerebral Palsy (CP) has an impact on muscles and movement. This happens due to brain damage before the age of two years. Either sometimes before birth, during childbirth or after birth. According to hjarnfonden.se, 200 children are added annually in Sweden with CP. People living with CP have these weaknesses for the rest of their lives. CP is not progressive disorder, that means brain damage can’