Search results for "beta"

Radiofrekvences katetra ablācijas metodes ilgtermiņa efektivitāte pacientiem ar mirdzaritmiju

2016

Ievads: Priekškambaru mirdzaritmija jeb ātriju fibrilācija (ĀF) ir visbiežāk sastopamais aritmijas veids, kas skar aptuveni divus procentus no kopējas populācijas. Risks saslimt ar ĀF pieaug līdz ar vecumu. Pēdējos gados pasaulē un arī Latvijā tiek izmantota mazinvazīva procedūra - radiofrekvences katetra ablācija (RFKA). Šī ārstēšanas metode ir indicēta pacientiem ar ĀF, kura turpina persistēt un recidivēt, neskatoties uz adekvātu medikamentozu terapiju. Ablācijas metodes pamata mērķis ir izārstēt ĀF un uzlabot pacienta dzīves kvalitāti, samazinot slimības simptomātiku. Pētījuma mērķis: Novērtēt radiofrekvences katetra ablācijas ilgtermiņā efektivitāti pacientiem ar ĀF. Materiāli un metode…

Rare beta decays and the spectrum-shape method

2017

This is a thesis consisting of seven publications and an introductory part on theoretical studies on rare single beta decays. Firstly, the theoretical framework is applied to the computation of partial half-lives for few selected cases of rare single beta-decay transitions. This includes the study on a possible ultra-low-Q-value decay branch of 115Cd as well as the highly forbidden beta decays of 48Ca and 50V. The double magic 48Ca is one of the few experimentally verified nuclei that decay via the two-neutrino mode of double beta decay. A theoretical study on the single beta-decay branches was used to inspect the competition between the single and double beta-decay channels. In the case of…

Mecanismos moleculares del deterioro cognitivo en encefalopatía hepática mínima. Papel de la neuroinflamación en la alteración de la neurotransmisión

2018

La encefalopatía hepática (EH) es un síndrome neuropsiquiátrico que afecta a un gran número de pacientes con diversas enfermedades hepáticas, especialmente cirrosis, como consecuencia de la acumulación de deshechos metabólicos mal detoxificados, sobre todo amonio. En su forma más leve, la EH mínima cursa con déficit cognitivo y motor leve que es reproducido por las ratas hiperamonémicas, uno de los modelos empleados para su estudio. Además, estas ratas presentan neuroinflamación, otro de los factores desencadenantes de este síndrome. Se ha visto que las ratas hiperamonémicas presentan alteraciones en la expresión en membrana de receptores de glutamato en el hipocampo, lo cual se ha relacion…

Subtropical streams harbour higher genus richness and lower abundance of insects compared to boreal streams, but scale matters

2018

Aim: Biological diversity typically varies between climatically different regions, and regions closer to the equator often support higher numbers of taxa than those closer to the poles. However, these trends have been assessed for a few organism groups, and the existing studies have rarely been based on extensive identical surveys in different climatic regions. Location: We conducted standardized surveys of wadeable streams in a boreal (western Finland) and a subtropical (south-eastern Brazil) region, sampling insects identically from 100 streams in each region and measuring the same environmental variables in both regions. Taxon: Aquatic insects. Methods: Comparisons were made at the scale…

Off-Adherence Keeping (OAK) observational study: intentional off-adherence immunomodulatory multiple sclerosis treatment

2022

Aims: To evaluate how improved treatment adherence with a lower-frequency regimen/treatment of intramuscular (IM) IFN beta-1a impacts therapeutic effectiveness in relapsing-remitting multiple sclerosis (MS) patients switching from a higher-frequency injectable regimen/treatment. Patients & methods: Italian patients with relapsing-remitting MS and prior poor adherence to high-frequency injectable treatments (n = 181) were followed for 24 months after starting IM IFN beta-1a. Results: During the study, 97.4% of patients were treatment adherent; 22.1% of patients reported a relapse. The estimated probability of remaining relapse-free after 2 years was 78%. A high dropout rate (52.5%) led t…

Grāmatu kultūra Tibetas budismā

2019

Grāmata ir kaut kas vairāk nekā tikai reliģisko doktrīnu avots, tā drīzāk ir daļa no rituālas prakses, kura iedarbojas uz pieredzi. Tas ir sakrāls objekts jeb relikvija, kurš iemieso sevī Budas prātu un ķermeni materiālā pasaulē. Mūsdienās grāmatas materialitāte kļūst par novecojušu konceptu, jo grāmatā saturiskas ‘idejas’ formā dominē pāri tās ‘materiālam’ aspektam. Pētījumā mērķis ir noskaidrot vai materiālās kultūras pētniecība spēj dod jaunu skatījumu uz Tibetas budisma tradīcijas sociāli-kulturālo un reliģisko dzīvi. Tēze tiek atvasināta no aktuāliem reliģijas pētniecības jautājumiem – reliģiskā materialitāte jeb materiālā kultūra. Pēc uzbūves pētījums sastāv no trijām nodaļām: materiā…

Medium-term effects of bisoprolol administration on renal hemodynamics and function in mild to moderate essential hypertension

2007

Arterial hypertension is a significant cause of end-stage renal failure; effective treatment of hypertensive patients reduces the rate of progression of this disorder. ss-Blockers, particularly nonselective agents, are associated with deterioration of renal function in patients with chronic renal failure. Previous studies on the interaction of the beta1-selective adrenergic antagonist bisoprolol with kidney function have been performed only acutely and over the short term. This study was designed to evaluate the antihypertensive efficacy and effects on renal hemodynamics and function of bisoprolol during medium-term (6 mo) treatment of patients with mild to moderate essential hypertension. …

On repeated moral hazard with a present biased agent

2013

Total Absorption Spectroscopy of Fission Fragments Relevant for Reactor Antineutrino Spectra and Decay Heat Calculations

2016

Beta decay of fission products is at the origin of decay heat and antineutrino emission in nuclear reactors. Decay heat represents about 7% of the reactor power during operation and strongly impacts reactor safety. Reactor antineutrino detection is used in several fundamental neutrino physics experiments and it can also be used for reactor monitoring and non-proliferation purposes. 92,93Rb are two fission products of importance in reactor antineutrino spectra and decay heat, but their β-decay properties are not well known. New measurements of 92,93Rb β-decay properties have been performed at the IGISOL facility (Jyväskylä, Finland) using Total Absorption Spectroscopy (TAS). TAS is complemen…

Occupation probabilities of single particle levels using the microscopic interacting boson model: Application to some nuclei of interest in neutrinol…

2016

We have developed a new method to calculate the occupancies of single particle levels in atomic nuclei. This method has been developed in the context of the microscopic interacting boson model, in which neutron and proton degrees of freedom are treated explicitly. The energies of the single particle levels constitute a very important input for the calculation of the occupancies in this method. In principle these energies can be considered as input parameters that can be fitted to reproduce the experimental occupancies. Instead of fitting, in this study we have extracted the single particle energies from experimental data on nuclei with a particle more or one particle less than a shell closu…