1,186 research outputs found
Comparison of variables of torpor between populations of a hibernating subtropical/tropical bat at different latitudes
A program that "cannot conform to all". Economics and bureaucracy in the final years of the first peronist.
El presente artículo indaga en algunos aspectos de la política económica del gobierno peronista en el periodo que se abre a partir de 1953-1954, al momento de consolidación de los cambios introducidos a las políticas económicas iniciales luego de la crisis de 1949-1952. Específicamente se estudia un programa poco considerado por la historiografía, el Plan de Acción de Equilibrio para la Economía Nacional anunciado en octubre de 1954 y las transformaciones burocráticas que lo acompañaron. De esta forma, nuestro objetivo es anudar el análisis de las modificaciones operadas en los ámbitos de gestión económica con las medidas tomadas en materia de política económica e identificar las capacidades estatales e instrumentos diseñados por el peronismo.This article explores some aspects of the Peronist government’s economic policy in the period from 1953 to 1954 at the time of consolidation of the changes made to the initial economic policy after the crisis of 1949-1952. Specifically we study a program scarcely considered by the historians, the Action Plan for National Economic Balance of October 1954, and bureaucratic changes that accompanied it. Thus, our goal is to tie the analysis of the amendments made in the areas of economic management with the measures taken in regard to economic policy, with the specific purpose of identifying the links between the two areas and arrive at a more complete understanding of actions and determinants of these changes.Fil: Rougier, Marcelo Norberto. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Stawski, Martín Esteban. Universidad de Buenos Aires. Departamento de Ciencias Exactas; Argentina. Universidad Nacional Tres de Febrero; Argentin
Assessing the Need for a Specialist Service for People with Intellectual Disabilities and Mental Health Problems Living in Israel: A Qualitative Study
Background: It is well established that people with intellectual disabilities are at higher risk of developing mental illnesses. This study aimed to assess the need for a specialized service for people (children and adults) with intellectual disabilities and mental health problems living in Israel. Methods: Our research question was: is there a need for a specialist mental health service for people with intellectual disabilities living in Israel and, if so, what type of service would be most appropriate? We conducted a qualitative study using semi-structured interviews with 14 major stakeholders to identify key themes in response to our research question. The data were coded and themes were identified. Results: Participants were generally not satisfied with current mental health care for people with intellectual disabilities and there was a general agreement that services are in need of improvement. We identified three major themes from the data. These were: current services, future services, and ways to facilitate change. Conclusion: We hope that our findings will be instrumental in shaping the ongoing debate about the best form of delivery of services to this population in Israel. Specifically, we suggest the development of a more specialized system, with the formation of multidisciplinary regional assessment and treatment units in parallel with improved relevant training for all mental health workers and the possibility of referral to specialized teams in more complex cases
A new cue for torpor induction: charcoal, ash and smoke
Recent work has shown that the use of torpor for energy conservation increases after forest fires in heterothermic mammals, probably in response to the reduction of food. However, the specific environmental cues for this increased torpor expression remain unknown. It is possible that smoke and the novel substrate of charcoal and ash act as signals for an impending period of starvation requiring torpor. We therefore tested the hypothesis that the combined cues of smoke, a charcoal/ash substrate and food shortage will enhance torpor expression in a small forest-dwelling marsupial, the yellowfooted antechinus (Antechinus flavipes), because like other animals that live in fire-prone habitats they must effectively respond to fires to ensure survival. Activity and body temperature patterns of individuals in outdoor aviaries were measured under natural environmental conditions. All individuals were strictly nocturnal, but diurnal activity was observed shortly after smoke exposure. Overall, torpor in females was longer and deeper than that in males. Interestingly, while both males and females increased daily torpor duration during food restriction by >2-fold as anticipated, a combination of food restriction and smoke exposure on a charcoal/ash substrate further increased daily torpor duration by ∼2-fold in both sexes. These data show that this combination of cues for torpor induction is stronger than food shortage on its own. Our study provides significant new information on how a small forest-dwelling mammal responds to fire cues during and immediately after a fire and identifies a new, not previously recognised, regulatory mechanism for thermal biology in mammals
More functions of torpor and their roles in a changing world
Increased winter survival by reducing energy expenditure in adult animals is often viewed as the primary function of torpor. However, torpor has many other functions that ultimately increase the survival of heterothermic mammals and birds. In this review, we summarize new findings revealing that animals use torpor to cope with the conditions during and after natural disasters, including fires, storms, and heat waves. Furthermore, we suggest that torpor, which also prolongs longevity and was likely crucial for survival of mammals during the time of the dinosaur extinctions, will be advantageous in a changing world. Climate change is assumed to lead to an increase in the occurrence and intensity of climatic disasters, such as those listed above and also abnormal floods, droughts, and extreme temperatures. The opportunistic use of torpor, found in many heterothermic species, will likely enhance survival of these challenges, because these species can reduce energy and foraging requirements. However, many strictly seasonal hibernators will likely face the negative consequences of the predicted increase in temperature, such as range contraction. Overall, available data suggest that opportunistic heterotherms with their flexible energy requirements have an adaptive advantage over homeotherms in response to unpredictable conditions
Physiological and behavioral responses of an arboreal mammal to smoke and charcoal-ash substrate.
The recent observation that torpor plays a key role in post-fire survival has been mainly attributed to the reduced food resources after fires. However, some of these adjustments can be facilitated or amplified by environmental changes associated with fires, such as the presence of a charcoal-ash substrate. In a previous experiment on a small terrestrial mammal the presence of charcoal and ash linked to food restriction intensified torpor use. However, whether fire cues also act as a trigger of torpor use when food is available and whether they affect other species including arboreal mammals remains elusive. To evaluate whether smoke, charcoal and ash can act as proximate triggers for an impending period of food shortage requiring torpor for mammals, we conducted an experiment on captive sugar gliders (Petaurus breviceps), a small, arboreal marsupial, housed in outside aviaries under different food regimes and natural ambient conditions. When food was available, fire simulation via exposure to smoke and charcoal-ash substrate caused a significant earlier start of activity and a significant decrease in resting body temperature. In contrast, only when food was withheld, did smoke and charcoal-ash exposure significantly enhance torpor depth and duration. Thus, our study not only provides evidence that fire simulation does affect arboreal and terrestrial species similarly, but also suggests that smoke and ash were presumably selected as cues for torpor induction because they indicate an impending lack of food
Selection for high activity-related aerobic metabolism does not alter the capacity of non-shivering thermogenesis in bank voles
“On demand” triggered crystallization of CaCO3 from solute precursor species stabilized by the water-in-oil microemulsion
Can we control the crystallization of solid CaCO3 from supersaturated aqueous solutions and thus mimic a natural process predicted to occur in living organisms that produce biominerals? Here we show how we achieved this by confining the reaction between Ca2+ and CO32- ions to the environment of nanosized water cores of water-in-oil microemulsions, in which the reaction between the ions is controlled by the intermicellar exchange processes. Using a combination of in situ small-angle X-ray scattering, high-energy X-ray diffraction, and low-dose liquid-cell scanning transmission electron microscopy, we elucidate how the presence of micellar interfaces leads to the formation of a solute CaCO3 phase/species that can be stabilized for extended periods of time inside micellar water nano-droplets. The nucleation and growth of any solid CaCO3 polymorph, including the amorphous phase, from such nano-droplets is prevented despite the fact that the water cores in the used microemulsion are highly supersaturated with respect to all known calcium carbonate solid phases. On the other hand the presence of the solute CaCO3 phase inside of the water cores decreases the rigidity of the micellar surfactant/water interface, which promotes the aggregation of micelles and the formation of large (>2 μm in diameter) globules. The actual precipitation and crystallization of solid CaCO3 could be triggered “on-demand” through the targeted removal of the organic-inorganic interface and hence the destabilization of globules carrying the CaCO3 solute
Оценка средней скорости на 10-и метровой глубине для разрезов с высокоскоростным верхним слоем при микрорайонировании
Описываются способы оценки средней скорости поперечной волны на 10-и метровой глубине для разрезов, верхняя часть которых представлена уплотненным насыпным грунтом или мерзлыми породами
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