Search results

Filter

Filetype

Your search for "*" yielded 532511 hits

Erythropoietin suppresses the activation of pro-apoptotic genes in head and neck squamous cell carcinoma xenografts exposed to surgical trauma.

Several studies on the use of erythropoietin (Epo) to treat anaemia in patients undergoing cancer treatment have shown adverse effects on tumour control and survival. Experimental studies indicate that this could be linked to an interaction with wound healing processes and not an effect on tumour cells per se. We have previously shown that erythropoietin in combination with surgical trauma stimula

Improved spectral sensitivity by combining periodic shadowing and high dynamic range imaging

Most emission spectra are characterized by lines of various intensities, a feature making them difficult to probe in their entirety - the limited dynamic range of the detector prohibits the simultaneous observation of both weak and intense spectral features. A further known complication in spectroscopy concerns the generation and detection of stray light, which is an undesired contribution of ligh

Temperature Dependence of the Laminar Burning Velocity of Methanol Flames

To better understand and predict the combustion behavior of methanol in engines, sound knowledge of the effect of the pressure, unburned mixture temperature, and composition on the laminar burning velocity is required. Because many of the existing experimental data for this property are compromised by the effects of flame stretch and instabilities, this study was aimed at obtaining new, accurate d

Male Subfertility and Prostate Cancer Risk: Epidemiological and Genetic Studies

Popular Abstract in Swedish De manliga könshormonerna, sk. androgener, spelar en nyckelroll under foster-utvecklingen av de manliga inre (t ex. blåshalskörtel/prostata) och yttre (t ex. penis) könsorganen. Androgenerna stimulerar även tillväxten av desamma under puberteten samt upprätthåller de manliga kroppsegenskaperna under vuxenlivet. De två huvudsakliga androgenerna är testosteron (T) samt 5αAndrogen action plays a pivotal role in male reproductive tract physiology and pathology. The androgen receptor (AR) gene harbors two codon repeat tracts: the CAG and GGN repeats, encoding corresponding amino acid sequences of variable length; the polyglutamine and polyglycine stretches, respectively. Variation in CAG repeat length had been associated with a number of andrological disorders, where

A Novel Method to Simulate the Progression of Collagen Degeneration of Cartilage in the Knee: Data from the Osteoarthritis Initiative.

We present a novel algorithm combined with computational modeling to simulate the development of knee osteoarthritis. The degeneration algorithm was based on excessive and cumulatively accumulated stresses within knee joint cartilage during physiological gait loading. In the algorithm, the collagen network stiffness of cartilage was reduced iteratively if excessive maximum principal stresses were

Distribution and Function of the Hydrogen Sulfide-Sensitive TRPA1 Ion Channel in Rat Urinary Bladder

OBJECTIVES: To investigate the distribution of the transient receptor potential (TRP) A1 ion channel in the rat urinary bladder, and to study the effects of hydrogen sulfide (H(2)S) and known TRPA1 activators on micturition in conscious rats and on heterologously expressed ion channels. METHODS: The expression of TRPA1 in urinary bladder was studied with fluorescence immunohistochemistry and real-

Physical workload in various types of work: Part I. Wrist and forearm

The quantitative relationship between exposure to physical risk factors and upper extremity work-related musculoskeletal disorders (UE-WMSDs) is virtually unknown. To explore the variation, objective measurements were derived in 43 types of work (686 individuals), using goniometry for the wrists and electromyography (EMG) for the forearm extensor muscles. The variations due to work were great for

Simulation of critical evacuation conditions for a fire scenario involving cables and comparison of two different cables

Previous studies on the evaluation of irritant species from burning cables in a modified prEN 50399 fire test produced FEC/FED values based on ISO TS 13571. However, the ISO standard mentions in its scope that these indices can only be used within e.g. modelling. For this reason Europacable (ECBL) initiated a preliminary case-study to asses the possibility of using modern fire safety engineering t

The effects of 55 years of different inorganic fertiliser regimes on soil properties and microbial community composition

Agricultural fertilisation increases crop yields but can cause environmental damage, thus reductions in inorganic fertiliser application have been advocated. Farmer usage of phosphate rock has declined over the last decade, which may lead to soil nutrient depletion that undermines future crop production. We investigated the long-term (55 years) effects of eight different inorganic fertiliser regim

Pharmacological modulation of glutamate transmission in a rat model of L-DOPA-induced dyskinesia: effects on motor behavior and striatal nuclear signalling.

L-DOPA-induced dyskinesia (LID) in Parkinson's disease has been linked to altered dopamine and glutamate transmission within the basal ganglia. In the present study, we compared compounds targeting specific subtypes of glutamate receptors or calcium channels for their ability to attenuate LID and the associated activation of striatal nuclear signalling and gene expression in the rat. Rats with 6-h

Dual-conjugate adaptive optics for wide-field high-resolution retinal imaging

We present analysis and preliminary laboratory testing of a real-time dual-conjugate adaptive optics (DCAO) instrument for ophthalmology that will enable wide-field high resolution imaging of the retina in vivo. The setup comprises five retinal guide stars (GS) and two deformable mirrors (DM), one conjugate to the pupil and one conjugate to a plane close to the retina. The DCAO instrument has a cl

The effects of dilution with nitrogen and steam on the laminar burning velocity of methanol at room and elevated temperatures

Dilution of flames using recirculated exhaust gas or water vapor is an important NOx reduction technique in various combustion applications. Dilution, however, can also lead to combustion instabilities due to reduced burning velocities. For methanol/air flames this subject is largely unexplored. Therefore, the current work examines the effects of diluting methanol/air flames with nitrogen and wate

Improving outcomes in patients with coronary heart disease using national registers and platelet function testing

Popular Abstract in Swedish Hjärt och kärlsjukdomar utgör idag den vanligaste orsaken till död världen över. I denna avhandling studerades patienter med hjärt-kärlsjukdom inom svenska register för att analysera betydelsen av olika komponenter av behandlingen vid hjärt-kärlsjukdom. Komponenter som utvärderades var tid till primär perkutan (endovaskulär) kranskärlsintervention (PCI), dvs ballongvidgIntroduction: Ischemic heart disease is the leading cause of death worldwide. The aims of this thesis were to evaluate different contemporary approaches in coronary care with regard to mortality and myocardial infarction. Methods: The thesis consists of 6 papers with 4 papers evaluating different exposures and their outcomes (clopidogrel pre-treatment, 5 different anti-platelet protocols, ticagrel

Characterization of genetic variation in TLR8 in relation to allergic rhinitis.

A previous investigation of all 10 TLR-genes for associations with allergic rhinitis (AR) detected a number of significant SNPs in the TLR8 locus. The associations indicated that an accumulation of rare variants could explain the signal. The present study therefore searches for rare variants in the TLR8 region and also investigates the reproducibility of previous SNP associations.

Boreal forest dynamics in north-eastern Sweden during the last 10,000 years based on pollen analysis

A pollen record obtained from a 2.2-m sediment succession deposited in a small lake in the province of Vasterbotten, north-eastern Sweden, reveals the presence of continuous forest cover since 8,500 calendar years before present (cal B.P.). Forest with abundant Pinus (pine) and Betula (birch) initially colonized the area, followed by a dominance of deciduous trees, primarily Betula, from ca. 8,000

Metabolite Profiles Reveal Energy Failure and Impaired Beta-Oxidation in Liver of Mice with Complex III Deficiency Due to a BCS1L Mutation.

AIMS: Liver is a target organ in many mitochondrial disorders, especially if the complex III assembly factor BCS1L is mutated. To reveal disease mechanism due to such mutations, we have produced a transgenic mouse model with c.232A>G mutation in Bcs1l, the causative mutation for GRACILE syndrome. The homozygous mice develop mitochondrial hepatopathy with steatosis and fibrosis after weaning. Our a

Sverige som partner 1309-1905 : ett perspektiv

Här behandlas Sveriges förbindelser med andra politisk-territoriella enheter, frånmedeltidens dynastiska unioner över de tidigmoderna konglomeratstaterna till1800-talets union av två nationalstater. Med hjälp av befintlig forskning fokuserasstatens växlande sammansättning och vikten av att skilja mellan riket och staten.Ett sådant perspektiv visar nya aspekter och ställer frågor som ett traditioneDuring most of the period from 1319 to 1905, the kingdom of Sweden formed part of a larger state, either through union with other states or through the possession of provinces that were not part of the kingdom proper. This is a neglected theme in Swedish historiography, where Sweden is described as a trans-historical entity, sometimes larger and sometimes smaller than the present state but still b

When patient empowerment encounters professional autonomy: The conflict and negotiation process of inscribing an eHealth service

In Sweden, as in many other European countries, government and public agencies have promoted the expansion of eHealth over the past years, arguing that this development enhances patient participation, empowerment and cost efficiency. This paper presents a longitudinal study of the deployment of My medical records on the Internet, a civic service originally inspired by the home banking concept. The

QM/MM study of the insertion of metal ion into protoporphyrin IX by ferrochelatase

Ferrochelatase catalyzes the metallation of protoporphyrin IX in the terminal step of heme biosynthesis. Mutations in the ferrochelatase gene can lead to the disease erythropoietic porphyria. The catalyzing mechanism of ferrochelatase is still not fully understood. In this paper, we have studied the insertion of Fe2+ into the protoporphyrin IX ring by Bacillus subtilis ferrochelatase using combine