Redesenho do espaço público para a vivência slow : o caso da zona da muralha aveirense

Mestrado Integrado em ArquitecturaExame público realizado em 28 de Janeiro de 2016A vida social no Espaço Público hoje é reduzida à presença de pessoas mais idosas, as quais desde sempre cresceram com a noção de que, as praças, por exemplo, são o centro da vida social. Percebe-se que as gerações mais jovens frequentam com mais regularidade os centros comerciais, essa nova tipologia do espaço público, mas que é privada, e assim abandonam-se as praças, os largos, os terreiros, no geral, os espaços públicos descobertos, que se encontram espalhados pelas cidades e eram geradores de relações entre as pessoas. Tem-se como estratégia devolver a vida e a memória desses espaços e introduzir novas estratégias que permitam que o Homem volte a usar “a rua”, para recuperar a vida social, mas também para que este consiga encontrar nela a sua calma e o seu equilíbrio, contribuindo também assim para eliminar o ritmo frenético vivêncial que assola hoje a vida das pessoas.The social life in the public space is now reduced to the presence of older people, who have always grown up with the notion that, the squares, for example, are the center of social life. It is noticed that the younger generations attend more regularly the shopping centers, this new type of public space, but private, and so they leave the streets, the squares, the terraces, in general, public spaces discovered, that they are spread through the towns and were are generating relationships between people . It has been a strategy to return the life and the memory of these spaces and introduce new strategies to make the man using again "the street " to retrieve the social life, but also to ensure that it can find your own quiet and balance, contributing also to eliminate the frenetic rhythm that plagues the lives of people today

Studies on the solubility of phenolic compounds

Mestrado com dupla diplomação com a Universidade Tecnológica Federal do ParanáPhenolic compounds generally act as antioxidant and free radical scavengers, having several practical applications in the pharmaceutical, food, oil and chemical industrial processes. Among those compounds, phenolic acids represent a group that is widely present in some natural products, showing interesting properties, such as preventers of some degenerative diseases, with application in the pharmaceutical industry. Furthermore, solubility studies play a key role to obtain a significant yield and a representative product, being an important parameter for the development of new drugs as well as the optimization of already existent processes. In this context, the main objective of this work is to measure the solubility of gallic, protocatechuic, gentisic and α-resorcylic acids in water and organic solvents (methanol, ethanol, 1-propanol, isopropanol, 2-butanone, ethyl acetate, dimethylformamide and acetonitrile) at 298.15 and 313.15 K and to employ the NRTL-SAC thermodynamic model coupled to the Reference Solvent Approach (RSA) to describe the solubility data. The experimental methodology was the shake-flask method coupled to the gravimetric method and, in general, the results obtained were satisfactorily consistent with the information available in literature for gallic and protocatechuic acids. For gentisic and α-resorcylic acids, no solubility studies were found at the analyzed temperatures until now. Melting points and enthalpies of fusion of the selected phenolic acids were also measured via Differential Scanning Calorimetry (DSC). Finally, the NRTL-SAC segment descriptors were obtained by fitting the solubility data in seven solvents, obtaining average relative deviations (ARD) between 25 and 34%. The model was then applied to predict the solubility in 1-propanol and dimethylformamide and the ARD% were 70 and 78%, respectively. Those values are satisfactory for semi-predictive models, using a limited set of solvents, showing that the NRTL-SAC is adequate to model binary systems containing the selected phenolic acids.Compostos fenólicos geralmente agem como antioxidantes e sequestradores de radicais livres, possuindo diversas aplicações práticas, tais como em processos farmacêuticos, alimentícios, na indústria de petróleo e na indústria química. Dentre esses compostos, os ácidos fenólicos representam um grupo amplamente presente in alguns produtos naturais, apresentando propriedades interessantes, como preventivos de algumas doenças degenerativas, o que os torna amplamente utilizados na indústria farmacêutica. Além disso, estudos de solubilidade desempenham um papel chave para a obtenção de rendimentos significativos e produtos representativos na indústria farmacêutica, sendo a solubilidade um parâmetro primordial no desenvolvimento de novos medicamentos bem como na otimização de processos já implementados. Nesse contexto, o principal objetivo deste trabalho é a medição de solubilidade dos ácidos gálico, protocatechuico, gentísico e α-resorcílico em água e em solventes orgânicos (metanol, etanol, 1-propanol, 2-propanol, 2-butanona, acetato de etilo, acetonitrilo e dimetilformamida) a 298,15 e 313,15 K e aplicar o modelo termodinâmico NRTL-SAC combinado com a abordagem do Solvente Referência para descrever os dados de solubilidade. A metodologia experimental utilizada foi o método do frasco agitado combinado com o método gravimétrico e, em geral, os resultados obtidos foram consistentes com a informação disponível na literatura para os ácidos gálico e protocatechuico. Em relação aos ácidos gentísico e α-resorcílico, nenhum estudo de solubilidade foi encontrado nas temperaturas analisadas até o momento. Pontos e entalpias de fusão dos compostos selecionados também foram medidos por Calorimetria Diferencial de Varrimento (DSC). Finalmente, os descritores de segmentos NRTL-SAC forram obtidos através de ajuste de dados de solubilidade em sete solventes, obtendo-se um erro relativo médio (ARD) entre 25 e 34%. O modelo foi então aplicado na previsão da solubilidade em 1-propanol e em dimetilformamida e os ARD% foram de 70 e 78%, respectivamente. Esses valores são satisfatórios para modelos semipreditivos, com base em um pequeno conjunto de solventes, o que indica o modelo NRTL-SAC como adequado para modelar sistemas binários contendo os ácidos fenólicos selecionados.This work is a result of project “AIProcMat@N2020 - Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020”, with the reference NORTE-01-0145-FEDER-000006, supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF) and of Project POCI-01-0145-FEDER-006984 – Associate Laboratory LSRE-LCM funded by ERDF through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI) – and by national funds through FCT - Fundação para a Ciência e a Tecnologia

“SER PROFESSOR”: quem sou eu e porquê?

INTRODUÇÃO: Ser profissional da saúde e simultaneamente docente, abrange diferentes campos de conhecimento e distintas identidades profissionais, atuando na formação do futuro profissional de saúde. Compatibilizar esses campos constitui assim uma questão essencial. OBJETIVOS: Entender o processo de formação da identidade docente, seu profissionalismo e cotejar nossos dados analiticamente com a literatura. METODOLOGIA: A partir de uma oficina com duração de 04 horas de discussão, destinada a professores do curso de medicina, perguntou-se sobre suas motivações para a docência, sobre suas dificuldades e estratégias desenvolvidas para sua superação. Além de médicos, outros profissionais não médicos foram envolvidos. RESULTADOS: 21 professores participaram. As motivações identificadas foram: 1. Identificação; 2. Renovação. As dificuldades relatadas foram: 1. Dificuldade de equilibrar vida profissional e pessoal; 2. Diferenças geracionais; 3. Remuneração. Estratégias identificadas: 1. Melhor uso do tempo; 2. Renovação pessoal; 3. Senso de humor; 4. Aprendizado sobre novas tecnologias; 5. Compartilhamento de problemas na busca de soluções. DISCUSSÃO: Este trabalho propiciou a criação de um espaço de discussão sobre significado profissional, identificando suas motivações e dificuldades encontradas. Desenvolveu-se assim a busca de um novo olhar para atuação do docente da área de saúde. CONCLUSÕES: A experiência mostrou que a promoção de oportunidades de reflexão do papel docente, de sua identidade, construída na prática, e a importância do envolvimento institucional, é fundamental na promoção destas atitudes

Octanol–water partition coefficients and aqueous solubility data of monoterpenoids: experimental, modeling, and environmental distribution

Terpenes and terpenoids encompass one of the most extensive and valuable classes of secondary metabolites. Their ten-carbon-containing oxygenated representatives, monoterpenoids, are the main components of plant essential oils, being widely exploited in the cosmetic, pharmaceutical, and food industrial areas. Due to its widespread use, it is crucial to investigate their environmental distribution. Thus, new water solubility data were obtained for six monoterpenoids ((1R)-(+)-camphor, (S)-(+)-carvone, eucalyptol, (1R)- (−)-fenchone, L-(−)-menthol, and (−)-menthone) at 298.2 and 313.2 K. Furthermore, octanol−water partition coefficients of 12 monoterpenoids (the six mentioned above plus carvacrol, (±)-β-citronellol, eugenol, geraniol, linalool, and thymol) were measured at 298.2 K. The COSMO-RS thermodynamic model and other more empirical approaches were evaluated for the description of the solubilities and partition coefficients, showing reliable predictions. Lastly, the distribution of the monoterpenoids in the different environmental compartments was assessed through an intuitive two-dimensional chemical space diagram based on the physicochemical equilibrium information reported.This work was developed within the scope of the project CIMO-Mountain Research Center, UIDB/00690/2020, and CICECO-Aveiro Institute of Materials, UIDB/50011/2020 and UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology (FCT)/MCTES. S.M.V.-B. thanks FCT and the European Social Fund (ESF) for his Ph.D. grant (SFRH/BD/138149/2018). M.C.d.C. would also like to thank CNPq (306666/ 2020-0) and FAPESP (2014/21252-0).info:eu-repo/semantics/publishedVersio

The role of the anion in imidazolium-based ionic liquids for fuel and terpenes processing

Abstract: The potentialities of methylimidazolium-based ionic liquids (ILs) as solvents were evaluated for some relevant separation problems—terpene fractionation and fuel processing—studying selectivities, capacities, and solvent performance indices. The activity coefficients at infinite dilution of the solute (1) in the IL (3), g¥ 13, of 52 organic solutes were measured by inverse gas chromatography over a temperature range of 333.2–453.2 K. The selected ILs are 1-butyl-3-methylimidazolium hexafluorophosphate, [C4mim][PF6], and the equimolar mixture of [C4mim][PF6] and 1-butyl-3-methylimidazolium chloride, [C4mim]Cl. Generally, low polar solutes follow g¥ 1,[C4mim]Cl > g¥ 1,[C4mim][PF6]+[C4mim]Cl > g¥ 1,[C4mim][PF6] while the opposite behavior is observed for alcohols and water. For citrus essential oil deterpenation, the results suggest that cations with long alkyl chains, such as [C12mim]+, promote capacity, while selectivity depends on the solute polarity. Promising results were obtained for the separation of several model mixtures relevant to fuel industries using the equimolar mixture of [C4mim][PF6] and [C4mim]Cl. This work demonstrates the importance of tailoring the polarity of the solvents, suggesting the use of ILs with mixed anions as alternative solvents for the removal of aliphatic hydrocarbons and contaminants from fuels.This research was funded by the European Regional Development Fund (ERDF) through the Regional Operational Program North 2020, within the scope of Project GreenHealth—Digital strategies in biological assets to improve well-being and promote green health, Norte-01-0145-FEDER- 000042, to which A. Zambom is thankful for her grant. S. M. Vilas-Boas thanks FCT and the European Social Fund (ESF) for his Ph.D. grant (SFRH/BD/138149/2018 and COVID/BD/152936/2022). L.P.Silva acknowledges FCT for her Ph.D. grant (SFRH/BD/135976/2018).info:eu-repo/semantics/publishedVersio

Estimativa da concentração de metais pesados em solos dos tabuleiros do Recôncavo da Bahia

Cadernos de Geociências, v. 13, n. 1 - Especial UFBA 70 anos, Jul. 2016.Original publicado em Cadernos de Geociências, v. 7, n.1, Maio 2010

Palynology and palynofacies studies in the lowermost Jurassic of the Lusitanian Basin (Pereiros Formation of the Silves Group), Portugal: evidence of the first transgressive episode

The Silves Group of the Lusitanian Basin in Portugal represents the initial infill of the continental rifting basins that formed during the breakup of northern Pangaea regions. Evaporites, especially halite, mark the transition from continental to marine settings and the beginning of the deposition in passive margin basins. This work presents the results of the palynostratigraphic and palynofacies analysis of two partial sections from the Pereiros Formation at the top of the Silves Group. The two sections are composed of sandstones, mudstones and dolostones interpreted as deposited in fluvial and lacustrine settings without apparent marine influence. The palynological content is diverse and wellpreserved, dating both sections to the early Hettangian (Lower Jurassic), indicated by the presence of spores Ischyosporites variegatus, Kraeuselisporites reissingeri, Porcellispora longdonensis and the pollen grains Perinopollenites elatoides and Pinuspollenites minimus. The palynological content of one of the sections (Lamas I) is noticeable by microforaminifera linings, suggesting evidence for a hitherto marine incursion at this age in the Silves Group stratigraphy. The beds that yielded the microforaminifera linings are interpreted as having been deposited in an estuarine-type setting, created by the first and short-lived marine transgressive event in the Lusitanian Basin during the early Hettangian.PRIN 2017RX9XXXYinfo:eu-repo/semantics/publishedVersio

Estimativa da concentração de metais pesados em solos dos tabuleiros do Recôncavo da Bahia.

O objetivo deste trabalho foi analisar a correlação e a formulação de equações de regressão múltipla para cálculo de concentração de alguns metais pesados a partir de valores encontrados para alguns atributos do solo. As amostras foram coletadas de 0,0 a 0,2m e de 0,8 a 1,0m, em latossolos derivados da Formação Barreiras, abertas em mistura ácida e analisadas por ICPOES. O manganês, o titânio, o ferro e o alumínio apresentaram-se como as melhores variáveis preditoras para a regressão linear múltipla, enquanto que o cobalto e o titânio apresentaram a correlação mais forte nas duas profundidades estudadas

Vapor pressure and thermophysical properties of eugenol and (+)-carvone

In this work, vapor pressures, liquid-phase heat capacities, and phase behavior of two monoterpenoids, (þ)-carvone and eugenol were studied. The vapor pressure experiments were performed using a static method over an environmentally relevant range of temperatures, from 258 K to 308 K. Liquid-phase heat capacities were measured by Tian-Calvet calorimetry between 265 K and 355 K. The phase behavior was investigated by heat-flux differential scanning calorimetry from 183 K. Experimental data were supplemented by ideal-gas thermodynamic properties obtained by combining quantum chemical and statistical thermodynamic calculations. Vapor pressures and heat capacities obtained in this work along with selected literature values were treated simultaneously by multi-property correlation in order to obtain a consistent description of thermodynamically linked properties. To our knowledge, liquid-phase heat capacities and phase behavior of eugenol are reported for the first time in this work.The authors M.F., K.R., V. S., and V.P. acknowledge financial support from the Czech Science Foundation (GACR no. 17-03875S) and specific university research (MSMT No. 20-SVV/2018). The authors S.M.V., O.F., and S.P.P. acknowledge financial support from the project POCI-01-0145-FEDER-006984 e Associate Laboratory LSRE-LCM (UID/EQU/50020/2019) funded by national funds through FCT/MCTES (PIDDAC). S.M.V. also acknowledges FCT for his PhD grant (SFRH/BD/138149/2018).info:eu-repo/semantics/publishedVersio

Water activity and freezing points in aqueous solutions of manganese nitrate: experimental and modeling

The water activities of manganese nitrate solutions were measured using a humidity sensor instrument up to almost the saturation molality at 298.15 K; the thermodynamic properties of the system were described by the Pitzer model and specific interaction theory (SIT). The evaluation of the ion interaction parameters for the Pitzer model and SIT were carried out using experimental freezing points and osmotic coefficients of manganese nitrate aqueous solutions, collected from the open literature, and the water activity data measured in this work. A set of Pitzer and SIT parameters were estimated using a temperature dependency, that enables us to cover wider temperature ranges, and consequently calculate system properties to higher molalities. Both approaches represent very satisfactorily, and with similar accuracy, the experimental data and the calculated manganese nitrate molal activity coefficients are comparable to those already published for analogous systems. Additionally, the Pitzer model was also able to calculate the ice curve and the solubility branch of manganese nitrate hexahydrate up to a salt solution 6.5 mol-kg-1.This work was developed in the scope of the projects POCI-01-0145-FEDER- 006984—Associate Laboratory LSRE-LCM both funded by European Regional Development Fund (ERDF) through COMPETE2020—Programa Operacional Competitividade e Internacionalização (POCI)—and by national funds through FCT—Fundação para a Ciência e a Tecnologia. This work is also a result of project ‘‘AIProcMat@N2020—Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020’’, with the reference NORTE-01-0145-FEDER-000006, supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through ERDF.info:eu-repo/semantics/publishedVersio