Search results for "XAS"
showing 10 items of 49 documents
Speciation of Sb in airborne particulate matter, vehicle brake linings, and brake pad wear residues
2013
Insights into the speciation of Sb in samples of brake linings, brake pad wear residues, road dust, and atmospheric particulate matter PM10 and PM2.5 were obtained combining several well established and advanced characterization techniques, such as scanning electron microscopy e energy dispersive spectrometry (SEM-EDS), inductively coupled plasma mass spectrometry (ICP-MS) and synchrotron radiation X-ray absorption spectroscopy (SR-XAS). The advantage of SR-XAS is that samples do not undergo any chemical treatment prior to measurements, thus excluding possible alterations. These analyses revealed that the samples of wheel rims dust, road dust, and atmospheric particulate matter are composed…
Helminth parasites in faecal samples from the endangered Iberian lynx (Lynx pardinus).
2011
The Iberian lynx is the most endangered felid in the world. Enteropathogens may threaten its survival, and therefore we analysed faecal samples from 66 different individuals (37 males and 29 females), the largest population representation studied to date. The samples were obtained from November 2005 to October 2008 in the two areas where the Iberian lynx survives: Sierra Morena and Donana (Andalusia, southern Spain). A total of 56.1% samples were parasitized with at least 6 species of helminths, including two cestodes (Hymenolepis spp. and Taenia spp.) and four Nematodes (Ancylostoma spp., Toxocara spp., Toxascaris leonina, and Capillaria sp.). In this work, the presence of Hymenolepis is r…
Impact of freeze-thaw cytoablation on aqueous outflow patterns in ex vivo anterior chamber perfusion cultures and whole eyes
2022
Background: Porcine eyes have been widely used as ex vivo models in glaucoma research, as they share similar features with human eyes. Freeze-thawing is a non-invasive technique that has been used to obliterate living cells in anterior segment ex vivo cultures, to prepare them for further research such as cellular repopulation. This technique has previously been shown to reduce the intraocular pressure (IOP) in porcine eyes. The aim of this study was to investigate whether freeze-thaw cytoablation causes corresponding canalogram outflow changes in perfused anterior segment cultures (AFT) and whole porcine eyes (WFT). We hypothesized that the known IOP drop in AFT after trabecular meshwork a…
Ecological divergence of closely related Diplostomum (Trematoda) parasites.
2006
Parasite life-cycles present intriguing model systems to study divergence in resource use and ecology between parasite taxa. In ecologically similar taxa, consistent selective forces may lead to convergence of life-history traits, but resource overlap and similarity of life-cycles may also promote divergence between the taxa in (1) use of host species or (2) specific niche within a host. We studied the life-history characteristics of 2 sympatric species of Diplostomum parasites, D. spathaceum and D. gasterostei, concentrating particularly on differences in intermediate host use and characteristics of the infective stages between the species. This group of trematodes is a notoriously difficu…
L'episteme e la sua giustificabilità razionale nella terza definizione del Teeteto: verso una teoria della responsabilità cognitiva
2010
"Salvation from unhappines by doing one's best" : a rhetorical analysis on Joel Osteen's sermons in the light of the US culture and values
2014
Tiivistelmä – Abstract Tämä laadullinen tutkimus keskittyy Joel Osteenin saarnoihin. Hän johtaa maan suurinta seurakuntaa, Lakewood-kirkkoa Texasin Houstonissa, USA:ssa. Tutkielma pyrkii vastaamaan kahteen tutkimuskysymykseen: 1) Mitkä ovat Osteenin eniten käyttämät retoriset keinot, ja kuinka ne näkyvät hänen saarnoissaan? 2) Miten Osteen käyttää hyväkseen kristillisiä oppeja ja Raamatun auktoriteettia vedotakseen kuulijoidensa kulttuurillisiin arvoihin? Aineiston prominentit retoriset keinot ovat toisto, kielikuvat, pronominien käyttö sekä pronominien suhde neuvojen ja käskyjen antamiseen. Tarkasteltavat kolme kulttuurista pääarvoa ovat individualismi, itsehoito sekä materialismi. Näiden …
A classification scheme for mobilization regions of bacterial plasmids
2003
Transmissible plasmids can be classified according to their mobilization ability, as being conjugative (self-transmissible) or mobilizable (transmissible only in the presence of additional conjugative functions). Naturally occurring mobilizable plasmids carry the genetic information necessary for relaxosome formation and processing, but lack the functions required for mating pair formation. Mobilizable plasmids have a tremendous impact in horizontal gene transfer in nature, including the spread of antibiotic resistance. However, analysis of their promiscuity and diversity has attracted less attention than that of conjugative plasmids. This review will focus on the analysis of the diversity …
Development and Implementation of the AIDA International Registry for Patients With VEXAS Syndrome
2022
ObjectiveThe aim of this paper is to present the AutoInflammatory Disease Alliance (AIDA) international Registry dedicated to Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic (VEXAS) syndrome, describing its design, construction, and modalities of dissemination.MethodsThis Registry is a clinical, physician-driven, population- and electronic-based instrument designed for the retrospective and prospective collection of real-life data. Data gathering is based on the Research Electronic Data Capture (REDCap) tool and is intended to obtain real-world evidence for daily patients' management. The Registry may potentially communicate with other on-line tools dedicated to VEXAS syndrome, thu…
NiO režģa dinamikas pētījumi ar apgriezto Monte-Karlo metodi
2022
NiO režģa dinamika tika izpētīta pie septiņām temperatūrām no 10K līdz 300K, izmantojot Ni K malas rentgenabsorbcijas spektroskopiju apvienojumā ar apgrieztā Monte Carlo simulācijām. Salīdzinājumam veica režģa dinamikas aprēķinus ar empīrisko potenciālu. Potenciāla modeli apstiprināja, salīdzinot eksperimentālos NiO Ni K malas izstieptās rentgenabsorbcijas sīkstruktūras (EXAFS) spektrus ar molekulārās dinamikas modelēšanas rezultātiem pie 300 K. Ni-O un Ni-Ni atomu pāru vidējās kvadrātiskās relatīvās nobīdes (MSRD) noteica ar divām metodēm un salīdzināja ar literatūrā pieejamajiem datiem.
Spēles ar nepilnīgu informāciju, Texas holdem spēles situāciju modelēšana
2020
Bakalaura darbā pētītas pretinieku modelēšanas metodes, risināti un analizēti spēlētāju stratēģiju veidi. Lai to paveiktu, ir nepieciešams iepazīties ar Spēļu teoriju. Skaidrākam kontekstam tiek aplūkoti spēļu teorijas jēdzieni, spēļu klasifikācija, tuvāk apskatītas spēles ar nepilnīgu informāciju, kas sevī iekļauj arī Beijesa formulas pielietošanu praktiski, kas nepieciešama, lai sekmīgi analizētu spēli. Kā pētāmā spēle izmantota pokera veids – Texas Hold’em, kuras noteikumi un izspēles gaita ir aprakstīta darbā. Spēlei ir izveidotas pretinieku modelēšanas metodes un aprēķinātas uzvaras varbūtības pie noteiktu izspēļu variantiem. Darba noslēgumā ir simulēta 2 spēlētāju spēle, lai praktiski…