In Fridtjof Nansens Hunting & adventure in the Arctic (1924), the last polar travel account Nansen wrote, he writes about his first experience with the Arctic; when he as a young student in 1882 joined the sealboat Viking to the sealing grounds outsideGreenland. The account is a polyphonic book where both the young student and the 63 year old scientist and polar hero alternately speaks. The young ...

Introduction Perioperative acute kidney injury (AKI) is associated with increased morbidity and mortality. Estimated glomerular filtration rate (eGFR) is routinely used to monitor renal function. This is an imprecise tool in the non-steady state condition and much kidney function can be lost before it is detectable by the eGFR method. A continuous low-dose infusion of iohexol has been proposed as ...

Both nationally and internationally, there is a rising ambition to reduce carbon footprint to fight climate change. However, climate change should not be seen as a solitary challenge as the human population has more than tripled since the 1950ths. We are therefore moving towards the inevitable crossroad where the food needed to sustain humanity and the traditional utilized resources we have ...

Background: Self-reported data on educational level have been collected for decades in the Tromsø Study, but their validity has yet to be established. Aim: To investigate the completeness and correctness of self-reported educational level in the Tromsø Study, using data from Statistics Norway. In addition, we explored the consequence of using these two data sources on educational trends in ...

Context: Hormone reference intervals in pediatric endocrinology are traditionally partitioned by age and lack the framework for benchmarking individual blood test results as normalized z-scores and plotting sequential measurements onto a chart. Reference curve modeling is applicable to endocrine variables and represents a standardized method to account for variation with gender and age.<p> <p>Objective: ...

We report measurements of atomic sodium, iron and temperature in the mesosphere and lower thermosphere (MLT) made by ground-based lidars at the ALOMAR observatory (69°N, 16°E) during a major sudden stratospheric warming (SSW) event that occurred in January 2009. The high resolution temporal observations allow the responses of the Na and Fe layers to the SSW at high northern latitudes to be ...

Tags are elements or (remnant) clauses that attach to a sentence in order to signal various speech acts, e.g. the common question tags of the type is it? isn’t it?. An affirmative tag, which is used in order for the speaker to confirm the content of the matrix clause is presented in (1). (1) Pappa kan hämta dig vid stationen, kan han nog (#1435) (Swedish) dad can fetch you with station.DEF can ...

In this thesis, the relationship between vitamin D and health-related outcomes has been investigated. More than 21,000 individuals participated in the Tromsø Study 2015-16. The participants donated blood samples and filled in questionnaires regarding their health status, including questions about their sleep health. Using these data, the association between vitamin D and sleep duration, daytime ...

Introduction: There is an increasing amount of research regarding the impact of malocclusions on OHRQoL. Reviews on this topic has mostly focused on children and adolescents, and therefore the aim of this thesis is to investigate the impact of professionally assessed normative orthodontic treatment need on adult OHRQOL. Materials and methods: Four electronic databases (PubMed, EMBASE, Cochrane ...

Background: Recently a large number of short non-coding-RNAs (microRNAs, (miRNA)) have been identified. These miRNAs act as post-transcriptional regulators where they generally have an inhibitory function. miRNAs are present in all human cells, and they are also detected in serum or plasma. The miRNAs have a broad range of actions, and their biogenesis must therefore be under tight control. One ...