Sökresultat

Stable carbon isotope curves derived from Lower Triassic carbonate rocks from three Iranian sections are established to investigate changes in the carbon cycle during the Early Triassic in this area. The sections are located in the south-center (Abadeh), north (Amol), and northwest (Zal) of Iran. All three curves show a similar pattern starting out with high δ13C values in the uppermost Permian de

Metastable nonradiative centers (supertraps) are significant energy loss channels in perovskite optoelectronic devices. In their active state, supertraps induce substantial energy loss through nonradiative recombination of free charge carriers. Transitions between active (energy loss) and passive (no energy loss) states result in photoluminescence (PL) blinking on timescales from milliseconds to s

Purpose To evade immunosurveillance many cancers convert tryptophan (Trp) into kynurenine (Kyn), which induces immunotolerance and suppresses immune responses. Elevated Kyn amounts have been found in blood from patients with cutaneous melanoma. This study aimed to investigate whether higher Kyn abundance and lower Trp abundance can be detected on the surface of cutaneous melanoma lesions compared

With the aim to understand prolonged and repeated marine anoxia after the Triassic-Jurassic massextinction event, a continuously cored, 338 metre thick succession of Rhaetian to Toarcian sediments was retrieved close to the village of Schandelah near Braunschweig (Lower Saxony, northern Germany). Here, preliminary biostratigraphical, lithological, sedimentological, geochemical, and geophysical bor

Background Recent decades have witnessed tangible improvements in childhood cancer survival. However, the prognosis for children with congenital heart disease (CHD), the most prevalent birth defect, remains unclear. Due to improved survival of CHD and childhood cancer, evaluating outcomes within this intersection is important for clinical practice. We aimed to assess mortality post-cancer diagnosi

Populations are presumed to be adapted to local environmental conditions via natural selection, with gene flow breaking up local adaptations. In birds, various aspects of feathers may reflect local adaptation. For example, the insulation capacity of feathers could be greater in colder regions, while colour variation may also play a role in adapting to local environmental conditions since darker fe

Background: Associations between high physical activity (PA) levels and incident atrial fibrillation (AF) is found in some earlier studies. We aim to study the association between levels of PA and AF in two cohorts. Methods: We used data from the Uppsala Longitudinal Study of Adult Men (ULSAM) study, initiated in 1970, included men aged 50 years, with 2202 included in the study. Examinations were

Several African countries, mainly the Democratic Republic of Congo, Burundi, and Uganda, are facing highly transmissible mpox clade Ib epidemics, prompting the World Health Organization to declare a Public Health Emergency of International Concern. It has spread to key travel hubs like Kinshasa, Bujumbura, and Kampala, increasing international spread risks. Current mitigation efforts focus mainly

The identification of biomarkers predicting the burden of brain alpha-synuclein (α-syn) pathology in vivo represents a research priority in Lewy body disease (LBD). Recently, some kinetic parameters of seed amplification assays (SAAs) for α-syn showed associations with measures of clinical progression. However, preanalytical and analytical factors significantly affect these parameters, reducing re

In June 2024, the community of Roxborough Park, Colorado conducted a wildfire evacuation exercise (or drill for short) that was observed by a team of researchers. This collaborative effort involved residents, community organizers, first responders, emergency managers, and researchers. The drill aimed to test and refine evacuation protocols, communication strategies, and coordination among various

In the Wadi Wasit area (Central Oman Mountains), Dienerian breccias are widespread. These breccias consist mostly of Guadalupian reefal blocks, often dolomitised, and some rare small-sized blocks of lowermost Triassic bivalve-bearing limestones, A unique block, with a size of about 200 m3, including Permian and earliest Triassic faunas has been studied in detail. The so-called Wadi Wasit block con

Aims/Hypothesis: Charcot foot (CF), a potentially debilitating complication of neuropathy, requires offloading to avoid foot deformities. Follow-up MRI examinations are often used to determine the optimal duration of total contact cast (TCC) offloading treatment. This study investigated the use of follow-up MRI during CF treatment and its relationship to offloading duration and risk of future surg

Dual-fuel engines are a way of transitioning the marine sector to carbon-neutral fuels like hydrogen and methanol. For the development of these engines, accurate simulation of the combustion process is needed, for which calculating the pilot’s ignition delay is essential. The present work investigates novel methodologies for calculating this. This involves the use of chemical kinetic schemes to co

The relationships among species in the genus Eranthis Salisb. were investigated using single nucleotide polymorphisms (SNPs) of the nuclear DNA internal transcribed spacer 1, 2 region (nrITS) and the chloroplast trnL-trnF interspacer region (cpIS). Phylogenetic relationships based on the nrITS and cpIS were inferred with posterior probabilities with STRUCTURE analysis and the neighbor-joining meth

Much attention has been given to the negative δ13C anomaly nearly coincident with the Permian-Triassic boundary. New data indicate a stepwise decline in δ13C initiating before the Latest Permian extinction event followed by highly variable δ13C values during the remaining Early Triassic. δ13C values appear much less erratic as global metazoan diversity increased in the Middle Triassic. Given the p

Partial differential equations (PDEs) are central in many scientific research areas, including modeling physical phenomena and economic forecasting. While the general solutions of PDEs can be complex, we can determine a particular solution by introducing boundary conditions and/or initial conditions. This is called an Initial Boundary Value Problem (IBVP). Thalassa is a framework that generates s

A new Early Triassic marine fauna is described from the Central Oman Mountains. The fauna is Griesbachian in age, on the basis of abundant conodonts and ammonoids, and was deposited in an oxygenated seamount setting off the Arabian platform margin. It is the first Griesbachian assemblage from a well-oxygenated marine setting and thus provides a test for the hypothesis that widespread anoxia preven