Search results for "57"

Sex Allocation Theory for Facultatively Sexual Organisms Inhabiting Seasonal Environments: The Importance of Bet Hedging

2018

Adaptive explanations for dormancy often invoke bet hedging, where reduced mean fitness can be adaptive if it associates with reduced fitness variance. Sex allocation theory typically ignores variance effects and focuses on mean fitness. For many cyclical parthenogens, these themes become linked, as only sexually produced eggs undergo the dormancy needed to survive harsh conditions. We ask how sex allocation and the timing of sex evolve when this constraint exists in the form of a trade-off between asexual reproduction and sexual production of dormant eggs—the former being crucial for within-season success and the latter for survival across seasons. We show that male production can be tempo…

TALPID3/KIAA0586 Regulates Multiple Aspects of Neuromuscular Patterning During Gastrointestinal Development in Animal Models and Human

2021

TALPID3/KIAA0586 is an evolutionary conserved protein, which plays an essential role in protein trafficking. Its role during gastrointestinal (GI) and enteric nervous system (ENS) development has not been studied previously. Here, we analyzed chicken, mouse and human embryonic GI tissues with TALPID3 mutations. The GI tract of TALPID3 chicken embryos was shortened and malformed. Histologically, the gut smooth muscle was mispatterned and enteric neural crest cells were scattered throughout the gut wall. Analysis of the Hedgehog pathway and gut extracellular matrix provided causative reasons for these defects. Interestingly, chicken intra-species grafting experiments and a conditional knockou…

Maturation of Epidermal Langerhans Cells In Vitro Is Accompanied by Downregulation of 4F2 (CD98) as Determined by Differential Display

1998

Following short-term culture, Langerhans cells mature morphologically and functionally into potent immunostimulatory cells. As regulation of gene expression accompanies this maturation process, it is likely that differentially expressed genes are involved in the maturation events. Using the recently described method of differential display, we generated cDNA expression patterns starting with mRNA of murine epidermal Langerhans cells isolated either directly (fLC) or following 3 d cultivation (cLC). Five hundred putative differentially expressed cDNA fragments were recovered from the gel. For a part of the fragments differential expression was confirmed by dot blot and Southern hybridization…

Antennal lobe representations are optimized when olfactory stimuli are periodically structured to simulate natural wing beat effects

2014

Animals use behaviors to actively sample the environment across a broad spectrum of sensory domains. These behaviors discretize the sensory experience into unique spatiotemporal moments, minimize sensory adaptation, and enhance perception. In olfaction, behaviors such as sniffing, antennal flicking, and wing beating all act to periodically expose olfactory epithelium. In mammals, it is thought that sniffing enhances neural representations; however, the effects of insect wing beating on representations remain unknown. To determine how well the antennal lobe produces odor-dependent representations when wing beating effects are simulated, we used extracellular methods to record neural units an…

Nèstor NOVELL i Josep SORRIBES: Nou Viatge pel País Valencià Universitat d'Alacant, Universitat de València i Institució Alfons el Magnànim, 2017, 15…

2018

Ti Alloyed α-Ga2O3: Route towards Wide Band Gap Engineering

2020

The suitability of Ti as a band gap modifier for &alpha

Global urban environmental change drives adaptation in white clover

2022

Made available in DSpace on 2022-04-28T19:52:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-03-18 Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban-rural gradients were associated with the evolution of clines in defense in 47% of cities throughout the world. Variation in the strength of clines was explained by environmental changes in drought stress and vegetation cover that varied am…

“Det sitter i veggene”. Materialitet og mennesker i distriktspsykiatriske sentra

2009

This dissertation examines the impact that the materiality of institutions has on patients and staff. Fieldwork has been carried out at five district psychiatric centres (Distriktspsykiatriske sentra, DPS) that were originally built as tuberculosis institutions. The patients’ and employees’ experiences of being present in the physical and social space of these institutions has been examined, interpreted and reflected upon. The paper provides knowledge about the significance institutions’ materiality and inner life has on the informants, and how the informants influence the materiality. Background Mental health care has moved away from institutions and towards the local community. The treatm…

La inscripción de la ciudadanía en la cuba neocolonial (1902-1919) : Sucinta referencia histórico-jurídica

2021

This historical-legal account brieflycovering 17 years of civil registration activity carried out during the neocolonial period by Municipal Judges and Secretaries, specifically that related to registration of Cuban citizens)becomes considerably relevant to understand and to godeeper into the origins of this complex process, as well asto achieve a re-encounter with the history of those who passed through those times, currently a hidden history in the shadows of Civil Registration offices, but still alive and thus allowing us to find all the beauty that there was in it.

La calidad percibida de los servicios deportivos: diferencias según instalación, género, edad y tipo de usuario en servicios náuticos. (The perceptio…

2008

En el ambito de la gestion deportiva, la calidad de losservicios deportivos y la satisfaccion de los usuarios es un area de gran desarrollo. Este trabajo pretende determinar el grado de calidad percibida en unos servicios deportivos de caracter publico como son unas escuelas de actividades nauticas. Para ello se analizaron 2375 usuarios de estas escuelas que contestaron un cuestionario sobre calidad de servicio percibida y satisfaccion con el servicio recibido. La escala de calidad percibida utilizada determino diez dimensiones de calidad: las clases, el tiempo libre, el entorno nautico, los horarios, la comida, el material nautico, la comida complementaria, la conserjeria, la limpieza y la…