Search results for "rex"
showing 10 items of 701 documents
Target Analogue Imprinted Polymers with Affinity for Folic Acid and Related Compounds
2001
Two approaches to synthesize molecularly imprinted polymers with affinity for folic acid and other substituted pteridines have been compared. In the first approach, the folic acid analogue methotrexate was used as template and functional monomers capable of generating selective binding sites were searched in a miniaturized screening system based on binding assessment in the batch mode. Highest selectivity was seen using 2-vinylpyridine as functional monomer, which was confirmed in the chromatographic mode for a batch synthesized on a gram scale. However, the retentivity and selectivity of this phase were insufficient for anticipated applications. In a second approach, using methacrylic acid…
First real–time detection of solar pp neutrinos by Borexino
2014
International audience; Solar neutrinos have been pivotal to the discovery of neutrino flavour oscillations and are a unique tool to probe the reactions that keep the Sun shine. Although most of solar neutrino components have been directly measured, the neutrinos emitted by the keystone pp reaction, in which two protons fuse to make a deuteron, have so far eluded direct detection. The Borexino experiment, an ultra-pure liquid scintillator detector running at the Laboratori Nazionali del Gran Sasso in Italy, has now filled the gap, providing the first direct real time measurement of pp neutrinos and of the solar neutrino luminosity.
Dysfunction of the mesolimbic circuit to food odors in women with anorexia and bulimia nervosa: A fMRI study
2019
Brain reward dysfunction in eating disorders has been widely reported. However, whether the neural correlates of hedonic and motivational experiences related to food cues are differentially affected in anorexia nervosa of restrictive type (ANr), bulimia nervosa (BN), and healthy control (HC) participants remains unknown. Here, 39 women (14 ANr, 13 BN, and 12 HC) underwent fMRI while smelling food or non-food odors in hunger and satiety states during liking and wanting tasks. ANr and BN patients reported less desire to eat odor-cued food and odor-cued high energy-density food (EDF), respectively. ANr patients exhibited lower ventral tegmental area (VTA) activation than BN patients to food od…
A call to experimentally study acute affect-regulation mechanisms specific to driven exercise in eating disorders.
2020
Driven exercise (i.e., feeling compelled to exercise to control one's weight or shape, to obtain other positive consequences of exercising, or to avoid other negative consequences of not exercising) is a common phenomenon in individuals with eating disorders (EDs), typically associated with negative clinical outcomes. Current theoretical models of driven exercise highlight the short-term affect-regulating outcome of acute driven exercise, which is implicated to maintain this symptom either by positive or negative reinforcement. However, few studies have actually investigated cognitive, affective, and psychobiological mechanisms related to acute driven exercise. In particular, experimental s…
Continental-scale patterns of pathogen prevalence: a case study on the corncrake
2014
Pathogen infections can represent a substantial threat to wild populations, especially those already limited in size. To determine how much variation in the pathogens observed among fragmented populations is caused by ecological factors, one needs to examine systems where host genetic diversity is consistent among the populations, thus controlling for any potentially confounding genetic effects. Here, we report geographic variation in haemosporidian infection among European populations of corncrake. This species now occurs in fragmented populations, but there is little genetic structure and equally high levels of genetic diversity among these populations. We observed a longitudinal gradient…
Sterliņu mārciņas kursa izmaiņu, saistība ar Brexit procesu attīstību, ietekme uz apvienotas karalistes eksporta un importa vērtību
2019
Darbs ir veltīts sterliņu mārciņas valūtas kursa izmaiņu, ko izraisīja Brexit procesi, ietekmi pētīšanai uz Apvienotās Karalistes ārējo tirdzniecību. Īpaša uzmanība tiek piešķirta jau esošo pētījumu analīzei par valūtas kursa ietekmi uz valsts ārējo tirdzniecību, tai skaitā tiek aplūkoti gan klasiskā pieeja šai teorijai, gan arī šī virziena mūsdienīgie pētījumi. Darbā, ar lineārās regresijas palīdzību, ir veikta reālā efektīvā mārciņas kursa ietekmes detalizētā analīze uz valsts eksporta un importa vērtību īstermiņa un ilgtermiņa periodā. Regresijas rezultāti parādīja, ka reālajam efektīvajam valūtas kursam ir diezgan ievērojama ietekme uz valsts eksportu un importu, tomēr autore nonāca pie…
Embarazo ectópico intersticial tratado con metotrexato y cirugía: caso clínico
2019
RESUMEN Antecedentes: El embarazo intersticial es muy inusual y representa <2,4% de todos las gestaciones ectópicas. Objetivo: Se presenta el caso de un embarazo ectópico intersticial tratado de forma médica y quirúrgica. Se realiza una revisión literaria sobre las opciones de manejo y tratamiento. Caso clínico: Paciente primigesta de 36 años con gestación ectópica cornual derecha tras 11 días de la transferencia de un embrión criopreservado. Se decide tratamiento con metotrexato (MTX) sin éxito y con progresión del embarazo, obligándonos por lo tanto a realizar una evacuación quirúrgica de la gestación, exponiendo a la paciente tanto a los efectos secundarios del tratamiento médico como a …
Ensayo clínico multicéntrico, aleatorizado y enmascarado con topiramato versus placebo para el tratamiento de recién nacidos con encefalopatía hipóxi…
2021
Antecedentes: La encefalopatía hipóxico-isquémica (EHI) perinatal constituye una de de las principales causas de muerte o discapacidad a largo plazo en recién nacidos a término en el mundo occidental, afectando a aproximadamente 1-4 por cada 1000 nacidos vivos y, en consecuencia, a alrededor de 5000-20000 recién nacidos por año en Europa. La hipotermia terapéutica se ha convertido en el tratamiento estándar de la EHI moderada o grave, siendo una terapia segura y eficaz para mejorar el desarrollo neurológico tras un insulto hipóxico-isquémico perinatal. A pesar de la hipotermia y las mejoras en los cuidados intensivos neonatales, el 45-50% de los recién nacidos con EHI moderada o grave muere…
Zirkadiane Serotonin- und Melatonin-Serumspiegel bei Anorexia-nervosa-Patientinnen im Vergleich zu normal-menstruierenden Frauen
1996
Day and night rhythms of melatonin and serotonin were measured in four female anorexia nervosa patients and for comparison in a control group with normal 28-day menstrual cycle. In the anorexia nervosa group the levels of gonadotropins and sexual steroids were distinctly lowered. In the LHRH test the hormonal profile showed pubertal to prepubertal patterns of secretion with an only moderate increase of LH and distinct shifting of the LH/FSH ratio in direction of FSH. For both groups the 24-hour profiles of melatonin and serotonin showed a normal cycle, i.e. melatonin had its maximum by night, whereas serotonin in contrast displayed its highest values by day. However, in the group of patient…
Acute selective ablation of rat insulin promoter-expressing (RIP HER ) neurons defines their orexigenic nature
2012
Rat insulin promoter (RIP)-expressing neurons in the hypothalamus control body weight and energy homeostasis. However, genetic approaches to study the role of these neurons have been limited by the fact that RIP expression is predominantly found in pancreatic β-cells, which impedes selective targeting of neurons. To define the function of hypothalamic RIP-expressing neurons, we set out to acutely and selectively eliminate them via diphtheria toxin-mediated ablation. Therefore, the diphtheria toxin receptor transgene was specifically expressed upon RIP-specific Cre recombination using a RIP-Cre line first described by Herrera (RIP HER -Cre) [Herrera PL (2000) Development 127:2317–2322]. Usi…