Search results for "ops"
showing 10 items of 5435 documents
Mitochondrial DNA deletion and male infertility
2010
MITOCHONDRIAL DNA DELETIONS AND MALE INFERTILITY Salerno Barbara, Gerardi Eliana and Elena Carra Dipartimento di Biologia Cellulare e dello Sviluppo,Università di Palermo Viale delle Scienze, Palermo, Italy; In men, oligozoospermia, asthenozoospermia, teratozoospermia and azoospermia are the main causes of infertility. The present research is aimed to investigate if mtDNA deletions can cause sperm defects in idiopathic astenozoospermic patients with different sperm motility and sperm concentration. The aim of this investigation was to test the hypothesis that whole sperm samples with lower levels of motility would have a higher incidence of spermatozoa with deletions in mitochondrial genome…
Brain Opioid Activity and Oxidative Injury: Different Molecular Scenarios Connecting Celiac Disease and Autistic Spectrum Disorder
2020
Celiac Disease (CD) is an immune-mediated disease triggered by the ingestion of wheat gliadin and related prolamins from other cereals, such as barley and rye. Immunity against these cereal-derived proteins is mediated by pro-inflammatory cytokines produced by both innate and adaptive system response in individuals unable to adequately digest them. Peptides generated in this condition are absorbed across the gut barrier, which in these patients is characterized by the deregulation of its permeability. Here, we discuss a possible correlation between CD and Autistic Spectrum Disorder (ASD) pathogenesis. ASD can be induced by an excessive and inappropriate brain opioid activity during the neon…
A new perspective on adolescent athletes’ transition into upper secondary school : A longitudinal mixed methods study protocol
2016
The challenge of combining elite sport and education into a dual career pathway remains to be a source of concern for many high-performance athletes. Previous research findings suggest that committed participation in both domains is highly demanding and success in one pursuit often comes at the expense of the other. There are emergent studies, however, that argue for the beneficial and complementary nature of dual career pathways. Consequently, we emphasize the importance of understanding the processes underlying differences in the development of athletes’ life trajectories. This article presents a study protocol to explore new methodological and analytical approaches that may extend curren…
Effects of Transcranial Direct Current Stimulation on Baseline and Slope of Prefrontal Cortex Hemodynamics During a Spatial Working Memory Task
2020
Background: Transcranial direct current stimulation (tDCS) has been shown to be an inexpensive, safe, and effective way of augmenting a variety of cognitive abilities. Relatively recent advances in neuroimaging technology have provided the ability to measure brain activity concurrently during active brain stimulation rather than after stimulation. The effects on brain activity elicited by tDCS during active tDCS reported by initial studies have been somewhat conflicted and seemingly dependent on whether a behavioral improvement was observed. Objective: The current study set out to address questions regarding behavioral change, within and between-participant designs as well as differentiatin…
"Jotain rumpujuttuja Afrikasta" : alakoulun opettajien näkemyksiä maailmanmusiikin opettamisesta
2015
Tässä tutkimuksessa pohditaan maailmanmusiikin käsitettä niin musiikillisesta kuin sosioekonomisesta näkökulmasta, sen määrittelyyn liittyviä ongelmia, maailmanmusiikin opettamisen pedagogiikkaa sekä peruskoulun ja maailmanmusiikin välistä suhdetta. Aihe tulee olemaan tärkeä globalisaation kiihtyvän tahdin myötä. Kansainvälistymiseltä ei voi enää välttyä. Lisäksi vuonna 2016 portaittain voimaan astuva opetussuunnitelma tukee vahvasti monikulttuurisuuteen liittyviä teemoja. Puolistrukturoituna haastattelututkimuksena toteutettu empiirinen osio sisältää kahdeksan Pirkanmaan alueella työskentelevän, musiikkia ainakin jonkin verran opettavan opettajan näkemyksiä aiheesta. Informantteja pyydetti…
Comparison of Exposure Techniques and Vitality Assessment of Mosses in Active Biomonitoring for Their Suitability in Assessing Heavy Metal Pollution …
2021
The most widespread and used technique is the moss-bag method in active biomonitoring of air pollution using mosses. In the literature, we can find various studies on the standardization of this method, including attempts to standardize treatments and preparation procedures for their universal application. Few works comprehensively focus on other methods or compare other techniques used in active biomonitoring with mosses, especially including measurements of their vital parameters. Our experiment aimed to assess air pollution by selected heavy metals (Cu, Zn, Cd, Pb, Mn, Fe, and Hg) using three moss species (Pleurozium schreberi, Sphagnum fallax, and Dicranum polysetum) during a 12-week ex…
First year chemistry experience : kokonaisvaltainen hyvinvointi kemian opiskelun perustana
2016
Tutkimuksessa selvitettiin ensimmäisen vuoden kemian opiskelijoiden motivaatiota kemian opiskelua kohtaan tarkastelemalla vuosien 2012 - 2015 Alkukeitos-kurssin lomakkeiden vastauksia. Niistä poimittiin syitä kemian opiskelun aloittamiselle ja pohdittiin näiden vaikutusta motivaatioon opiskella kemiaa. Lomakkeiden vastauksista kerättiin myös aloittaneiden opiskelijoiden odotuksia kemian opinnoista ja verrattiin näitä keväällä 2016 ensimmäisen vuoden opiskelijoille suoritetun kyselyn vastauksiin. Kyselyn vastausten avulla pyrittiin määrittämään vastaavatko kemian ensimmäisen vuoden opinnot opintonsa aloittaneiden odotuksia, kokevatko ensimmäisen vuoden opiskelijat opintonsa motivoiviksi ja o…
Prosessiteoreettinen näkökulma, joka selittää henkilökohtaisen tietokoneen käyttöön liittyvää tietoturvakäyttäytymisen muutosta
2016
IS security behavior has become a mainstream topic in information systems. Extent research is dominated with the viewpoint for discovery of generic and stable predictors. The viewpoint rests on the implicit assumption that information security behavior can be explained by discovering these factors. The best know examples are IS security behavior models grounded upon Protection Motivation Theory (PMT) and the Deterrence Theory (DT). The success of this perspective hinges on the question as to what extend the IS security behavior and the reasons for it, are constant from time to time and from one specific security situation to another. The viewpoint is successful if computer users have built …
Web-sovellus ohjelmoijien motivaation ja motivaatio-ongelmien kartoittamiseen ja korjaamiseen
2017
Tämä tutkielma pyrkii antamaan vastauksen siihen, kuinka voidaan toteuttaa www-sovellus, jolla voidaan mitata ja analysoida ohjelmoijien motivaatiota organisaatiossa ja kuinka voidaan laatia motivaatiosuunnitelma heikkojen motivaatioalueiden korjaamiseksi. Työn teoriaosuudessa käsitellään ensin taustateoriaa työtyytyväisyydestä ja motivaatiosta ja käydään läpi eräitä tärkeitä motivaatiomalleja. Tämän jälkeen valitaan kaksi motivaatiomallia, joille laaditaan toiminnalliset määrittelyt, joilla ne on mahdollista muuntaa mitattavaan ja laskettavaan muotoon. Teoriaosuudessa esitetään myös, kuinka motivaatiosuunnitelma tehdään ja kuinka voidaan laatia motivaatiota korjaavia toimenpiteitä. Teoriao…
Neural Correlates of Age-Related Changes in Precise Grip Force Regulation: A Combined EEG-fNIRS Study
2020
Motor control is associated with suppression of oscillatory activity in alpha (8–12 Hz) and beta (12–30 Hz) ranges and elevation of oxygenated hemoglobin levels in motor-cortical areas. Aging leads to changes in oscillatory and hemodynamic brain activity and impairments in motor control. However, the relationship between age-related changes in motor control and brain activity is not yet fully understood. Therefore, this study aimed to investigate age-related and task-complexity-related changes in grip force control and the underlying oscillatory and hemodynamic activity. Sixteen younger [age (mean ± SD) = 25.4 ± 1.9, 20–30 years] and 16 older (age = 56.7 ± 4.7, 50–70 years) healthy men were…