Search results

Filter

Filetype

Your search for "*" yielded 528642 hits

Kan bär förebygga och behandla typ 2-diabetes?

Bär är nyttiga och har hög näringstäthet i förhållande till mängden energi. Bär är även rika på polyfenoler som ger bären deras karakteristiska smak och färg. Polyfenolrika dieter har visats kunna skydda mot utveckling av vissa sjukdomar, till exempel typ 2-diabetes, men mekanismerna bakom de observerade effekterna är inte klarlagda. Flera olika mekanismer har föreslagits och involverar bland anna

Idacstar : A mcnp application to perform realistic dose estimations from internal or external contamination of radiopharmaceuticals

A Monte Carlo-based stand-alone program, IDACstar (Internal Dose Assessment by Computer), was developed, dedicated to perform radiation dose calculations using complex voxel simulations. To test the program, two irradiation situations were simulated, one hypothetical contamination case with 600 MBq of 99mTc and one extravasation case involving 370 MBq of 18F-FDG. The effective dose was estimated t

Neuropeptides : Active neuromodulators involved in the pathophysiology of suicidal behavior and major affective disorders

Neuropeptides, protein-like molecules used for direct communication between neurons, may play a critical role in the pathophysiology of mood disorders and suicidal behavior. This chapter aims to critically review the current literature on associations between neuropeptides, major affective disorders, and suicidal behavior. Most studies included in this overview reported an association between suic

Proposals for the establishment of national diagnostic reference levels for radiography for adult patients based on regional dose surveys in Russian Federation

In 2009-2014, dose surveys aimed to collect adult patient data and parameters of most common radiographic examinations were performed in six Russian regions. Typical patient doses were estimated for the selected examinations both in entrance surface dose and in effective dose. 75%-percentiles of typical patient effective dose distributions were proposed as preliminary regional diagnostic reference

Stable migration pattern of an ultra-short anatomical uncemented hip stem : A prospective study with 2 years radiostereometric analysis follow-up

Introduction: Shorter, anatomically shaped and proximally loading stems have been developed to achieve better stress distribution and be more bone preserving. The purpose of this prospective study was to evaluate the migration pattern of the Proxima™ ultra-short uncemented stem using radiostereometric analysis (RSA), and to review the literature regarding the migration of short stemmed hip arthrop

Large differences in proportions of harmful and benign amino acid substitutions between proteins and diseases

Genes and proteins are known to have differences in their sensitivity to alterations. Despite numerous sequencing studies, proportions of harmful and harmless substitutions are not known for proteins and groups of proteins. To address this question, we predicted the outcome for all possible single amino acid substitutions (AASs) in nine representative protein groups by using the PON-P2 method. The

Fluid evolution in CM carbonaceous chondrites tracked through the oxygen isotopic compositions of carbonates

The oxygen isotopic compositions of calcite grains in four CM carbonaceous chondrites have been determined by NanoSIMS, and results reveal that aqueous solutions evolved in a similar manner between parent body regions with different intensities of aqueous alteration. Two types of calcite were identified in Murchison, Mighei, Cold Bokkeveld and LaPaz Icefield 031166 by differences in their petrogra

Shock metamorphism and hydrothermal alteration of mafic impact ejecta from the Lockne impact structure, Sweden

The local geology at Kloxåsen is characterised by ejecta deposits from the 458 Ma Lockne marine impact. The Kloxåsen ejecta are located on a Caledonian parautochthonous unit, approximately 7 km from the centre of the 7.5-km-wide Lockne crater structure. The ejecta were deposited on the seafloor and were covered with seawater immediately after the impact event. Of special interest is a mafic impact

Evidence for an impact-induced biosphere from the δ34S signature of sulphides in the Rochechouart impact structure, France

The highly eroded 23 km diameter Rochechouart impact structure, France, has extensive evidence for post-impact hydrothermal alteration and sulphide mineralisation. The sulphides can be divided into four types on the basis of their mineralogy and host rock. They range from pyrites and chalcopyrite in the underlying coherent crystalline basement to pyrites hosted in the impactites. Sulphur isotopic

Elephant Moraine 96029, a very mildly aqueously altered and heated CM carbonaceous chondrite : Implications for the drivers of parent body processing

Elephant Moraine (EET) 96029 is a CM carbonaceous chondrite regolith breccia with evidence for unusually mild aqueous alteration, a later phase of heating and terrestrial weathering. The presence of phyllosilicates and carbonates within chondrules and the fine-grained matrix indicates that this meteorite was aqueously altered in its parent body. Features showing that water-mediated processing was

Anomalous supply of bioessential molybdenum in mid-Proterozoic surface environments

Granites aged 1.9. Ga to 1.5. Ga exhibit molybdenite mineralization globally. Sandstones deposited during the mid-Proterozoic have a provenance dominated by 1.9-1.7. Ga basement. The mid-Proterozoic surface environment was, consequently, receiving detritus from the molybdenum-rich granites. Thus there was a supply of molybdenum available in terrestrial or shallow marine environments at a time when

Aqueous alteration of chondrules from the Murchison CM carbonaceous chondrite : Replacement, pore filling, and the genesis of polyhedral serpentine

Forsterite and clinoenstatite in type IAB chondrules from the Murchison CM carbonaceous chondrite have been partially serpentinized, and the mechanisms of their alteration reveal crystallographic and microstructural controls on the reaction of silicate minerals with parent body aqueous solutions. Grains of forsterite were altered in two stages. Narrow veinlets of Fe-rich serpentine formed first an

Enhanced microbial activity in carbon-rich pillow lavas, Ordovician, Great Britain and Ireland

There is extensive evidence for the microbial colonization of seafloor basalts in the modern ocean and in the geological record. The sulfur isotope composition of pyrite in the basalts commonly indicates marked isotopic fractionation due to microbial sulfate reduction. Sections through the Nemagraptus gracilis zone (Ordovician) in Great Britain and Ireland are characterized by both widespread pill

The paradox between low shock-stage and evidence for compaction in CM carbonaceous chondrites explained by multiple low-intensity impacts

Petrographic analysis of eight CM carbonaceous chondrites (EET 96029, LAP 031166, LON 94101, MET 01072, Murchison, Murray, SCO 06043, QUE 93005) by electron imaging and diffraction, and X-ray computed tomography, reveals that six of them have a petrofabric defined by shock flattened chondrules. With the exception of Murchison, those CMs that have a strong petrofabric also contain open or mineraliz