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Perfluoroktansulfonsyra, PFOS en av människan tillverkad organisk syra, vars väteatomer har blivit utbytta mot fluoratomer och är en nyligen upptäckt förorening som tros finnas i 3,6 miljoner svenskars dricksvatten. Den här kandidatuppsatsen är en litteraturstudie i vilken förekomsten av PFOS i grundvattnet studeras. Det är förmågan att bilda ytbeläggningar som är avvisande mot smuts, fett och vatThe manufacture of products containing PFOS started in the 1950s, and has mainly been used as fire-fighting foam, (Aqueous Film Forming Foam), flooring, textiles, leather impregnation, cleaning and in impregnated paper. This has resulted in a global contamination that is widely spread in the hydrosphere, biosphere and the atmosphere; due to long and intensive use without any regulations. PFOS is a

“Because you cannot recommend yourself” – An exploratory study of practitioner perceptions on the use and challenges ofblogs as a medium in PR In the 21st century, an overwhelming majority of all information generated by companies and consumers is digital. Having gone from passive audiences to actively coproducing content for PR and marketing, consumers are better positioned than ever to share the

Climate change and the associated temperature increments are a reality, with temperature already rising in the last century. With a changing climate dissolved oxygen levels in the water will also suffer changes. The combination of changes due to alterations in the climate affects fish stocks, through alterations in the spawning-stock biomass. One of the fish stocks that are being affected is the A

This paper presents a structured methodology for the constrained multi-objective optimization (MO) of a continuous cross-flow atomic layer deposition (ALD) reactor model with temporal precursor pulsing. The process model has been elaborated and experimentally validated in the first two papers of this series (33 and 34). A general constrained MO problem (MOP) was formulated to simultaneously optimi

Many commercial dye preparations are cocktails of active dyes and various by-products that are recalcitrant to biological degradation and end up in significant amounts in the effluent after the dyeing process. Conventional wastewater treatment processes are not able to degrade such compounds and detoxify the effluent, thus alternative treatments should be developed. In our work we suggest to use p

Life’s Essential 8 (LE8) is a score that includes modifiable risk factors for cardiovascular disease. Four health behaviors (diet, physical activity, nicotine exposure and sleep health) and four health factors (non-HDL cholesterol, blood glucose, blood pressure and body mass index) are included. These modifiable risk factors promote inflammation, and inflammation is one of the biological mechanism

The influence of soil physicochemical properties on microbial communities can be large, especially in developing soils of glacier forefield chronosequences. However, small-scale expositional differences in bare soils and their impacts on soil microbial communities have so far been largely neglected. Here we studied the changes of microbial communities in three deglaciated unvegetated sites along a

BACKGROUND: The current trend of upgrading undervalued agricultural by-products involves the recovery of natural antioxidants. The purpose of this study was to recover phenols from fresh olive mill wastewater (OMW) with their dispersion in 85 mL ethanol per 100 mL and to investigate the effect of processing parameters on the phenol content and antioxidant capacity of the extracts. Moreover, all th

Abstract in UndeterminedSoil loss estimation remains one of the most difficult research tasks all over the world. Current simulation tools are still not detailed enough to allow for realistic scenarios to handle soil erosion problems. A common problem is the lack of rainfall data at a sufficient level of detail. The present study uses a cascade disaggregation model to generate short time scale rai

NADH:quinone oxidoreductase or complex I is a large membrane bound enzyme complex that has evolved from the combination of smaller functional building blocks. Intermediate size enzyme complexes exist in nature that comprise some, but not all of the protein subunits in full size 14-subunit complex I. The membrane spanning complex I subunits NuoL, NuoM and NuoN are homologous to each other and to tw

Introduction: Regenerative agriculture commonly aims to increase soil carbon sequestration, with potential benefits for human and ecosystem health, climate mitigation, and biodiversity. However, the effectiveness of various regenerative practices at increasing carbon sequestration is unclear. Methods: This study identified and quantified the yearly soil carbon sequestration rate of regenerative pr

We have studied the effects of cholesterol and steroid-based antibiotic fusidic acid (FA) on the behavior of lipid bilayers using a variety of experimental techniques together with atomic-scale molecular dynamics simulations. Capillary electrophoretic measurements showed that FA was incorporated into fluid 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine membranes. Differential scanning calorimetr

The c-myc proto-oncogene was analyzed in 311 cases of primary breast cancer, in 8% of which it was found to be amplified, usually at moderately increased copy number (2-5 copies). The adjacent pvt gene was co-amplified with c-myc in all tumors analyzed. C-myc amplification was significantly correlated to a high S-phase fraction and to amplification of the c-erbB-2 proto-oncogene. Weak relationship

Organ-specific lymphocyte homing is dependent on the expression of tissue-specific homing receptors and selected chemokine receptors. During the effector phase of an immune response, IgA and IgG antibody-secreting cells (ASC) are differently distributed in the body. Still, B cell expression of L-selectin and the mucosal homing receptor integrin alpha 4 beta 7 is not related to the isotype produced

Background: In Malmo approximately 250 000 citizens live in 17 administrative areas with substantial socioeconomic differences. At the single centre for arterial reconstruction, Malmo University Hospital, all procedures are registered prospectively. Methods: Between 1987 and 2002, 1832 Malmo citizens underwent reconstruction for peripheral arterial disease, either intermittent claudication (IQ or

The isotopic analysis of particles containing sub-pg to pg levels of uranium, released from nuclear material handling, has been proven as an efficient tool for international safeguard purposes. Precise and accurate measurement of both enrichment and the minor isotopes is, however, a challenging analytical task due to the low levels of material. One of the mainstay techniques for particle measureme

Cellulose, a polysaccharide consisting of beta-1,4-linked glucose, is the major component of plant cell walls and consequently one of the most abundant biopolymers on earth. Carbohydrate polymers such as cellulose are molecules with vast diversity in structure and function, and a multiplicity of hydrolases operating in concert are required for depolymerisation. The bacterium Rhodothermus marinus,

OBJECTIVE: The reason that only a minority of smokers develop chronic obstructive pulmonary disease (COPD) is still largely unknown. Glycosylation defects are involved in the pathological mechanisms in cystic fibrosis (CF), where chronic progressive obstructive lung disease dominates the clinical picture. Whether defects of protein glycosylation occur in COPD has not previously been examined. Incr

Over the years, there has been much debate regarding the conformational behavior of flexible polyelectrolytes with electrostatic interactions described by the D bye-Huckel approximation. In particular, the electrostatic persistence length has been reported to depend both quadratically and linearly on the screening length as well as having no consistent power-law dependence at all. On the basis of

The conversion of biomass to transportation fuels and value-added chemicals is a promising method to reduce the reliance on fossil fuels. Mo-based catalysts have been shown to be highly active in the hydrodeoxygenation of biomass-derived phenolic compounds. The catalyst active phase, surface species, and the effect of adding additional metals are not comprehensively understood. Here we compare the