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Under den tidigare delen av mesozoikum inträffade två massutdöende som i stor utsträckning kom att påverka jordens ekosystem. Det första inträffade i slutet av trias och påverkade både marina organismer och terrestrisk biota. Det andra mesozoiska utdöendet skedde under tidig toarcian i samband med ett anoxiskt event. Trots att den Australienska sen triassiska floran behandlats i ett flertal studieDuring the early Mesozoic two mass-extinction events profoundly reshaped the world’s biota. The first of these took place at the end of the Triassic and affected both marine organisms and terrestrial floras. The second occurred as an oceanic anoxic event during the early Toarcian. Although the Late Triassic floral assemblages of Australia have been the focus of many studies, there have been few in

An initial occupational survey (OS) was initiated to investigate the prevalence of venous gas embolism (VGE) in chamber attendants assisting hyperbaric oxygen (HBO2) treatments. Nine female subjects were exposed for three consecutive days to the routine hospital procedure of compressed air exposure to 240 kPa for approximately 115 min with 12 min of terminal oxygen (O2) breathing. VGE was monitore

Control of emission by intermolecular fluorescence resonant energy transfer (IFRET) and intermolecular charge transfer (ICT) is investigated with the quantum-chemistry method using two-dimensional (2D) and three-dimensional (3D) real space analysis methods. The work is based on the experiment of tunable emission from doped 1,3,5-triphenyl-2-pyrazoline (TPP) organic nanoparticles (Peng, A. D.; et a

Acute otitis media (AOM) is the most common reason for outpatient antimicrobial therapy. Mixed infections pose a potential problem, since the first-line drug used for the treatment of AOM, amoxicillin, can be neutralized by ß-lactamase-producing pathogens of the upper respiratory tract. To study the effects of a 5-day course of amoxicillin on a mixed middle ear infection, rats were challenged with

The critical role of polyamines in key processes such as cell growth, differentiation and macromolecular synthesis makes the enzymes involved in their synthesis potential targets in the treatment of certain types of cancer and parasitic diseases. Here we present a study on the inhibition of human and Leishmania donovani ODC (ornithine decarboxylase), the first committed enzyme in the polyamine bio

Dryland ecosystems are globally important, yet state-of-the-art dynamic vegetation models often lack specific processes or parameterizations that are critical for accurately simulating dryland dynamics. These missing processes include a realistic calculation of soil water movement, detailed plant–water relations, or a representation of deep water uptake. In this study, we show how including a proc

Who conducts biological research, where they do it and how results are disseminated vary among geographies and identities. Identifying and documenting these forms of bias by research communities is a critical step towards addressing them. We documented perceived and observed biases in movement ecology, a rapidly expanding sub-discipline of biology, which is strongly underpinned by fieldwork and te

Cancer is a disease of the genome caused by oncogene activation and tumor suppressor gene inhibition. Deep sequencing studies including large consortia such as TCGA and ICGC identified numerous tumor-specific mutations not only in protein-coding sequences but also in non-coding sequences. Although 98% of the genome is not translated into proteins, most studies have neglected the information hidden

Until now, computationally designed enzymes exhibited low catalytic rates1, 2, 3, 4–5 and required intensive experimental optimization to reach activity levels observed in comparable natural enzymes5, 6, 7, 8–9. These results exposed limitations in design methodology and suggested critical gaps in our understanding of the fundamentals of biocatalysis10,11. We present a fully computational workflow

Background: Cerebrospinal fluid (CSF) biomarkers have gained increasing importance in the diagnostic work-up of Alzheimer's disease (AD). The core CSF biomarkers related to AD pathology (Aβ42, t-tau and p-tau) are currently used in CSF diagnostics, while candidate markers of amyloid metabolism (Aβ38, Aβ40, sAPPα, sAPPβ), synaptic loss (neurogranin), neuroinflammation (YKL-40), neuronal damage (VIL

Aquaporins are integral membrane proteins that function as water channels highly specific for water or as aquaglyceroporins permeable to water as well as small solutes such as glycerol and urea. The model plant Arabidopsis thaliana has 35 genes encoding aquaporin proteins. Identifying the complete set of aquaporins in Arabidopsis constitutes an unique opportunity to comprehensively classify and re

The accuracy of NOAA AVHRR NDVI maximum value composites can be poor due to interference from several sources, including cloud cover. The objectives of this paper are; 1. to accurately quantify noise in this imagery over Africa using geostatistics, and 2. to test four compositing techniques that may be able to reduce this noise. The nugget of the variogram model is used to compute standardized noi

The resistivity method is an established geophysical method with a broad range of engineering and environmental applications. It has been tried numerous times on embankment dams, mainly for seepage investigations, dam status control and investigations of known defects. In previous use of the method on embankment dams some success has been reported, but only occasionally. The method is still not co

The diffusion of digital technologies has strongly affected the way scholars and researchers use and perceive the archaeological information detected during the field investigation process. Archaeologists are still only beginning to realize the full potential of these applications beyond the attraction of providing visually engaging documentation and focus on the analytical and interpretive power.

Many people have experienced computers not doing what they were expected to do or, perhaps more often, met with computers that deliver faulty results. Frequently, if not always, such behavior is blamed the lack of a complete requirements specification. hi this assertion, it is tacitly understood that if a specification is correct and comprehensive enough then it is possible to avoid computing erro

Stress corrosion, SC, in some cases gives rise to stress corrosion cracking, SCC, which differs from purely stress intensity driven cracks in many aspects. They initiate and grow under the influence of an aggressive environment in a stressed substrate. They grow at low load and may branch. The phenomenon of SCC is very complex, both the initiation phase and crack extension itself of SCC is seeming

Sensor based control systems increase flexibility and autonomy in robotics. One of the most common applications in robotics is welding, which is often limited to objects with fine tolerances. To be able to manage objects with relatively large tolerances, such as ship-hulls, sensor guided control systems have to be incorporated that are able to handle large deviations from the drawings. To be able

Examensarbetet fokuserar på utvärdering samt testning av FLEXNET, ett Unattended Ground Sensor (UGS) system utvecklat av Bertin Exensor. FLEXNET:s grund-läggande syfte är att övervaka stora områden utan att kräva omfattande resurser i form av personal som aktivt övervakar och underhåller systemet på plats. Vid utvecklandet av större system kan det ofta vara besvärligt att utföra fullskaliga test

The trend towards greater globalisation brings the matter of cultural identity to the foreground. Transnational corporations or business networks are culturally diverse places where cultural othering – simply put, the assumption that someone is fundamentally different from you based on the cultural identity projected on- or associated with them – can significantly impact operations across the hier

Bakgrund: Folkhögskolan är ett unikt nordiskt fenomen med stor möjlighet till anpassning av studierna. Studier i sig påverkar aktivitetsbalansen, vilken är upplevelsen av balans mellan måsten och meningsfulla aktiviteter. Folkhögskolestuderande är en underbeforskad grupp framförallt inom arbetsterapi. För att beskriva komplexiteten i aktivitetsbalans används aktivitetsvetenskapliga modeller. SyfteBackground: Folk high schools are a uniquely Nordic phenomenon with individualized pedagogy. Studying affects occupational balance, which is the experience of balance between tasks and meaningful activities. Folk high school students as a group are not widely researched, particularly in combination with occupational therapy. To describe the complexity of occupational balance, models linked to occu