The Universe is shaped as a web-like structure, formed by clusters, filaments, and walls that leave large volumes in between named voids. Galaxies in voids have been found to be of a later type, ...bluer, less massive, and to have a slower evolution than galaxies in denser environments (filaments and walls). However, the effect of the void environment on their stellar population properties is still unclear. We aim to address this question using 118 optical integral field unit datacubes from the Calar Alto Void Integral-field Treasury surveY (CAVITY), observed with the PMAS/PPaK spectrograph at the 3.5m telescope at the Calar Alto Observatory (Almería, Spain). We used the non-parametric full spectral fitting code STARLIGHT to estimate their stellar population properties: stellar mass, stellar mass surface density, age, star formation rate (SFR), and specific star formation rate (sSFR). We analysed the results through the global and spatially resolved properties. Then, we compared them with a control sample of galaxies in filaments and walls from the CALIFA survey, matched in stellar mass and morphological type. Key findings include void galaxies having a slightly higher half-light radius (HLR), lower stellar mass surface density, and younger ages across all morphological types, and slightly elevated SFR and sSFR (only significant enough for Sas). Many of these differences appear in the outer parts of spiral galaxies in voids (HLR > 1), which are younger and exhibit a higher sSFR, indicative of less evolved discs. This trend is also found for early-type spirals, suggesting a slower transition from star-forming to quiescent states in voids. Our analysis indicates that void galaxies, influenced by their surroundings, undergo a more gradual evolution, especially in their outer regions, with a more pronounced effect for low-mass galaxies.
Void galaxies are essential for understanding the physical processes that drive galaxy evolution because they are less affected by external factors than galaxies in denser environments, that is, in ...filaments, walls, and clusters. The stellar metallicity of a galaxy traces the accumulated fossil record of the star formation through the entire life of the galaxy. A comparison of the stellar metallicity of galaxies in various environments, including voids, filaments, walls, and clusters can provide valuable insights into how the large-scale environment affects the chemical evolution of the galaxy. We present the first comparison of the relation of the total stellar mass versus central stellar metallicity between galaxies in voids, filaments, walls, and clusters with different star formation history (SFH) types, morphologies, and colours for stellar masses between \(10^{8.0}\) to \(10^{11.5}\) solar masses and redshift \(0.01<z<0.05\). We applied non-parametric full spectral fitting techniques (pPXF and STECKMAP) to 10807 spectra from the SDSS-DR7 (987 in voids, 6463 in filaments and walls, and 3357 in clusters) and derived their central mass-weighted average stellar metallicity (\(\rm M/H_M\)). We find that galaxies in voids have slightly lower stellar metallicities on average than galaxies in filaments and walls (by~\(\sim~0.1\)~dex), and they are much lower than those of galaxies in clusters (by~\(\sim~0.4\)~dex). These differences are more significant for low-mass (\( \sim~10^{9.25}~{\rm M_\odot}\)) than for high-mass galaxies, for long-timescale SFH (extended along time) galaxies than for short-timescale SFHs (concentrated at early times) galaxies, for spiral than for elliptical galaxies, and for blue than for red galaxies.
Neural tube defects are congenital malformations of brain and spinal cord. There is evidence that adequate amounts of folic acid supply to women before and during early pregnancy decreases the risk ...of having a neural tube defects affected child. Main sources of folic acid are food rich in folic acid, multivitamins with folic acid supplementation, and folic acid fortification of cereal products.
To assess folic acid consumption from food and from medication in a group of mothers. To analyze their knowledge about using folic acid to prevent neural tube defects. To evaluate association between inadequate consumption and information, level of education, and concurrence to private or public health sector. To measure the amount of folic acid in bread sold within the region.
Observational cross-sectional study.
Mothers of children under 2 months of age that were assisted by 38 pediatricians in five cities in the Region, collected between November 2006 and March 2007. Amount of folic acid in bread: bread samples acquired in the same cities.
327 surveys were collected. The average daily intake of folic acid from food was 481 Hg; 43,4% of women consume less than 400 Hg daily. Medical supplementation was suitable in 27,8% of the sample. 52,9% had appropriated knowledge about folic acid and prevention of neural tube defects. Differences were observed between mothers concurring to private or public health sector, and those who had or had not completed secondary school in relation to both supplementation and knowledge of folic acid. The media amount of folic acid in bread samples was 192,34 Hg / 100 g. All samples were manufactured with fortified flour.
Effectiveness of a hot water dip conditioning (3 min, 53C) to prevent chilling injury was evaluated with Persian lime (Citrus latifolia Tanaka) fruits stored at 4, 8, 13 and 25C and 80% RH. ...Conditioning caused a significant increase in peroxidase and superoxide dismutase activities and lipoperoxidation levels in the flavedo of fruits immediately after treatment. During storage enzyme activities diminished until they reached control levels. Conditioned limes kept at 25C maintained higher lipoperoxidation levels than those stored at refrigerated temperatures during all storage periods. Lipoperoxidation decreased slowly in refrigerated fruits until they reached similar levels to control fruits. Chilling injury was observed at 4 and 8C, however, it showed the highest levels in heated fruits. Therefore, conditioning by heat did not act as a protective treatment against chilling injury of Persian limes, possibly because it was not able to sustain the increased antioxidant system during the entire storage period., 27 December 2003.
Air pollution is a phenomenon that combines and rapidly spreads solid particles and gases in the air, being one of the greatest problems that affects the environment and health of living beings ...worldwide. These agents are emitted by car gases, chemical compounds from industries, dust, and mold spores that are fund as suspended particles in the air, and its aspiration increases the risk of health problems in the population, affecting organs such as the heart and lung. The aim of this article is to use ICT to develop an expert system to detect the concentration levels of air pollutants such as carbon monoxide (CO), ozone (O3), sulfur dioxide (SO 2 ), nitrous oxide (NO2), and suspended particles such as: dust, dirt, soot, or smoke (PM2.5 and PM10) and to diagnose the impact on a person's health in real time. A descriptive-applied methodology was use, through the hypothetical-deductive scientific method. The software engineering methodology used was Buchanan, consisting of four stages: identification, conceptualization, formulation, and development. The result obtained was a prototype of an online platform that generates indicators on the levels of pollution in the air, where an expert system based on rule is integrated using the Horn clause, allowing users to detect the levels of the different air pollutants and to know what the health affectation is, depending on their current health status.
