257 research outputs found
Insecta, Coleoptera, Cerambycidae, Cerambycinae, Trachyderini: New state and country records from South America
Based on the revision of the collections of the Museu Nacional, Universidade Federal do Rio de Janeiro andthe National Museum of Natural History, Smithsonian Institution, the current work provides new localities for 32 speciesand two subspecies of Trachyderini from South America. Thirteen new country records from Argentina, Brazil, Colombia,Ecuador, Peru, Surinam and Venezuela and 35 new state records from Brazil are registered
Efeito dos modos de transferência e da composição de gás de protecção na emissão de partículas ultrafinas na soldadura MAG de aços
The present study aims to characterize ultrafine particles emitted during gas metal arc welding of mild steel and stainless steel, using different shielding gas mixtures, and to evaluate the effect of metal transfer modes, controlled by both processing parameters and shielding gas composition, on the quantity and morphology of the ultrafine particles. It was found that the amount of emitted ultrafine particles (measured by particle number and alveolar deposited surface area) are clearly dependent from the main welding parameters, namely the current intensity and the heat input of the Welding process. The emission of airborne ultrafine particles increases with the current intensity as fume formation rate does. When comparing the shielding gas mixtures, higher emissions were observed for more oxidizing mixtures, that is, with higher CO2 content, which means that these mixtures originate higher concentrations of ultrafine particles (as measured by number of particles. by cubic centimeter of air) and higher values of alveolar deposited surface area of particles, thus resulting in a more hazardous condition regarding welders exposure
RELAX Alternatives to Anger: Examining the Experiences of Latino Adults in an Anger Management Program
Anger Management Education (AME) is a growing genre of Family Life Education and Extension that shows promise in helping individuals manage the frequency and intensity of their anger. The majority of research using AME, however, has primarily examined outcomes from high-risk populations such as incarcerated populations, delinquent youth, and couples in relationship duress. This study examines the perceived benefits and experiences of 36 Latino adult participants in the RELAX: Alternatives to Anger family life education program. Five themes emerged using data from five focus group interviews depicting positive evaluative findings among participants, including (1) anger management strategies, (2) understanding anger, (3) improved relationships, (4) social support, and (5) cultural influence of anger. Implications for developing and implementing AME programming for Latino audiences are described
UV-C light: a promising preservation technology for vegetable-based nonsolid food products
A variety of bioactive substances present in fruit- and vegetable-processed products have health-promoting properties. The consumption of nutrient-rich plant-based products is essential to address undernutrition and micronutrient deficiencies. Preservation is paramount in manufacturing plant-based nonsolid foods such as juices, purees, and sauces. Thermal processing has been widely used to preserve fruit- and vegetable-based products by reducing enzymatic and microbial activities, thereby ensuring safety and prolonged shelf life. However, the nutritional value of products is compromised due to the deleterious effects of thermal treatments on essential nutrients and bioactive compounds. To prevent the loss of nutrients associated with thermal treatment, alternative technologies are being researched extensively. In studies conducted on nonsolid food, UV-C treatment has been proven to preserve quality and minimize nutrient degradation. This review compiles information on the use of UV-C technology in preserving the nutritional attributes of nonsolid foods derived from fruit and vegetables. The legislation, market potential, consumer acceptance, and limitations of UV-C are reviewed.PRIMA Horizon 2020 (H2020) grant number 2032, Functionalized Tomato Products (FunTomP) project.info:eu-repo/semantics/publishedVersio
Advances in the food packaging production from Agri-Food waste and by-products: Market trends for a sustainable development
Agricultural waste has been a prominent environmental concern due to its significant negative impact on the environment when it is incinerated, disposed of in landfills, or burned. These scenarios promoted innovations in the food packaging sector using renewable resources, namely agri-food waste and by-products such as bagasse, pulps, roots, shells, straws, and wastewater for the extraction and isolation of biopolymers that are later transformed into packaging materials such as bioplastics, biofilms, paper, and cardboards, among others. In this context, the circular bioeconomy (CBE) model is shown in the literature as a viable alternative for designing more sustainable production chains. Moreover, the biorefinery concept has been one of the main links between the agri-food chain and the food packaging industry. This review article aimed to compile recent advances in the food packaging field, presenting main industrial and scientific innovations, economic data, and the challenges the food packaging sector has faced in favor of sustainable development.Project PRIMA/2032/2021info:eu-repo/semantics/publishedVersio
Predicting sars-cov-2 weather-induced seasonal virulence from atmospheric air enthalpy
Following the coronavirus disease 2019 (COVID-19) pandemic, several studies have examined the possibility of correlating the virulence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes COVID-19, to the climatic conditions of the involved sites; however, inconclusive results have been generally obtained. Although neither air temperature nor humidity can be independently correlated with virus viability, a strong relationship between SARS-CoV-2 virulence and the specific enthalpy of moist air appears to exist, as confirmed by extensive data analysis. Given this framework, the present study involves a detailed investigation based on the first 20-30 days of the epidemic before public health interventions in 30 selected Italian provinces with rather different climates, here assumed as being representative of what happened in the country from North to South, of the relationship between COVID-19 distributions and the climatic conditions recorded at each site before the pandemic outbreak. Accordingly, a correlating equation between the incidence rate at the early stage of the epidemic and the foregoing average specific enthalpy of atmospheric air was developed, and an enthalpy-based seasonal virulence risk scale was proposed to predict the potential danger of COVID-19 outbreak due to the persistence of weather conditions favorable to SARS-CoV-2 viability. As an early detection tool, an unambiguous risk chart expressed in terms of coupled temperatures and relative humidity (RH) values was provided, showing that safer conditions occur in the case of higher RHs at the highest temperatures, and of lower RHs at the lowest temperatures. Despite the complex determinism and dynamics of the pandemic and the related caveats, the restriction of the study to its early stage allowed the proposed risk scale to result in agreement with the available infectivity data highlighted in the literature for a number of cities around the world
On the critical energy required for homogeneous nucleation in bubble chambers employed in dark matter searches
Two equations for the calculation of the critical energy required for
homogeneous nucleation in a superheated liquid, and the related critical radius
of the nucleated vapour bubble, are obtained, the former by the direct
application of the first law of thermodynamics, the latter by considering that
the bubble formation implies the overcoming of a barrier of the free enthalpy
potential. Comparisons with the currently used relationships demonstrate that
the sensitivity of the bubble chambers employed in dark matter searches can be
sometimes notably overestimated.Comment: 15 pages, 5 figures, 1 tabl
Espécies de Meloidae (Coleoptera) Ocorrentes no Estado do Rio de Janeiro, Brasil
A list of species of Meloidae that occurs in State of Rio de Janeiro is presented, based on literature and two entomological collections. Twenty-seven species of Meloidae are registered and information about geographical distribution and biology are added. A map with species distribution is provided.É apresentada uma lista das espécies de Meloidae que ocorrem no Estado do Rio de Janeiro, baseada em dados da literatura e duas coleções entomológicas. São registradas 27 espécies de Meloidae e informações sobre distribuição geográfica e biologia são adicionadas. Um mapa com a distribuição das espécies é fornecido
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