Recent Developments in the Applications of Fingerprinting Technology in the Food Field

info:eu-repo/semantics/publishedVersio

Mentoring in pre-service teaching: from reflection on practice to a didactic proposal

This article offers a review of different methodologies to mentor pre-service teachers’ pedagogical experience in EFL contexts in Colombia and their pedagogical implications when training future teachers. It also gives an overview of models presented for the purpose of mentoring. Finally, it proposes a model to guide the mentoring of pre-service teachers’ pedagogical experiences at schools in Bogotá considering the implications of talking about the mentoring in the teaching practicum and the roles of the participants. This model is a selection of mentoring strategies that can be extended to other contexts with similar characteristics

Differential volatile organic compounds signatures of apple juices from Madeira Island according to variety and geographical origin

One of the main food authenticity issues is related to products` false labelling concerning their variety or geo graphical origin. For this reason, the aim of this study was to establish distinctive characteristics for the dis crimination of apple juices according to regional varieties (Rijo, Verde, Ribeiro and Azedo) and geographical origin (Prazeres and Santo da Serra (Madeira Island)) on the basis of their volatile pattern by headspace solid phase microextraction combined with gas chromatography mass spectrometry (HS-SPME/GC–MS) combined with chemometric tools. The results obtained revealed a perfect discrimination between the different apple varieties, with Rijo apple juices as samples with the major relative concentration of ethanol, ethyl butanoate, ethyl 2-methylbutanoate and ethyl hexanoate. Moreover, this study allowed a geographical origin-based clas sification of Azedo apple juices, highlighting ethyl acetate, 2-methyl-1-propanol, ethyl hexanoate, and toluene (described for the first time in apple juices) as discriminatory features. This study demonstrated that volatile organic compounds (VOCs) could serve as authenticity indicators to verify variety and geographical origin of apple juices, providing local producers multiple benefits and legal protection against misuse of the products.info:eu-repo/semantics/publishedVersio

Formative research: challenges and tendencies

21st century teachers are not only required to develop top teaching skills, but also strong research ones that allow them to expand their understanding of teaching-learning phenomena and improve their school practices. This relatively recent trend has also impacted the Language Teaching field, making language programs in universities to develop different approaches to Formative Research for their student-teachers. This paper aims to contrast how two different universities (a private and a state one) understand and carry out formative research processes. The analysis attempts to specifically describe how two Bachelors of Arts in Education of teachers in Foreign Languages programs have dealt with formative research revealing goals and difficulties when initiating student-teachers in research

Determination of biosorption mechanism in biomass of agave, using spectroscopic and microscopic techniques for the purification of contaminated water

[Abstract] Lead (Pb2+) and copper (Cu2+) are polluting metals due to their toxicity; however, the extraction of these metals is essential for economic development, so it is important to look for efficient and low-cost alternatives that can remove heavy metals from the various bodies of water. One of the alternatives used in this work is biosorption, for which an agroindustrial waste (epidermis from Agave atrovirens) was used to evaluate the affinity of removal of lead and copper in aqueous solutions; in addition, spectroscopy and microscopy techniques were used to elucidate and corroborate the removal and affinity capacity of the agave epidermis for both metals studied. The optimal pH value for the removal of both metals was 3. The adsorption isotherms yielded a qmax of 25.7 and 8.6 mg/g for lead and copper, respectively. Adjusting to the Langmuir-Freundlich model, the adsorption kinetics were pseudo-second order, and it was found that the equilibrium time was at 140 min. The spectroscopy and microscopy analyses corroborated the affinity between metals and functional groups of the agave, as well as with the elemental analysis, which reported 17.38% of lead and 4.25% of copper.[Resumen] El plomo (Pb2+) y el cobre (Cu2+) son metales contaminantes debido a su toxicidad; sin embargo, la extracción de estos metales es indispensable para el desarrollo económico, por lo que es importante buscar alternativas eficientes y de bajo costo que puedan remover metales pesados de los diversos cuerpos de agua. Una de las alternativas utilizadas en este trabajo es la biosorción, para la cual se utilizó un residuo agroindustrial (epidermis de Agave atrovirens), para evaluar la afinidad de remoción del plomo y cobre en soluciones acuosas; adicionalmente, se emplearon técnicas de espesctroscopía y microscopía que permitieron elucidar y corroborar la capacidad de remoción y afinidad que tuvo la epidermis de A. atrovirens para ambos metales estudiados. El valor óptimo de pH para la remoción de ambos metales fue 3. Las isotermas de adsorción arrojaron una qmax de 25.7 y 8.6 mg/g para el plomo y cobre, respectivamente. Ajustando al modelo de Langmuir-Freundlich, las cinéticas de adsorción resultaron de pseudo-segundo orden, se encontró que el tiempo de equilibrio es a los 140 min. El análisis espectroscópico y microscópico, corroboró la afinidad entre metales y grupos funcionales del agave, así como con el análisis elemental, el cual reportó 17.38% de plomo y 4.25% de cobre

Typicality assessment of onions (Allium cepa) from different geographical regions based on the volatile signature and chemometric tools

Onion (Allium cepa L.) is one of the main agricultural commodities produced and consumed around the world. In the present work, for the first time, the volatile signature of onions from different geographical regions of Madeira Island (Caniço, Santa Cruz, Ribeira Brava, and Porto Moniz) was tested with headspace solid-phase microextraction (HS-SPME/GC-qMS) and chemometric tools, showing that the volatile signature was affected by the geographical region of cultivation. Sulfur compounds, furanic compounds, and aldehydes are the most dominant chemical groups. Some of the identified volatile organic metabolites (VOMs) were detected only in onions cultivated in specific regions; 17 VOMs were only identified in onions cultivated at Caniço, eight in Porto Moniz, two in Santa Cruz, two in Ribeira Brava, while 12 VOMs are common to all samples from the four regions. Moreover, some VOMs belonging to sulfur compounds (dipropyl disulfide, 3-(acetylthio)-2-methylfuran), furanic compounds (dimethylmethoxyfuranone, ethyl furanone, acetyloxy-dimethylfuranone), and lactones (whiskey lactone isomer), could be applied as potential geographical markers of onions, providing a useful tool to authenticate onions by farming regions where the influence of latitude seems to be an important factor for yielding the chemical profile and may contribute to geographical protection of food and simultaneously benefiting both consumers and farmers.info:eu-repo/semantics/publishedVersio

Untargeted fingerprinting of cider volatiles from different geographical regions by HS-SPME/GC-MS

The volatomic fingerprint of ciders produced in different geographical regions from Madeira Island was estab lished using headspace solid phase microextraction combined with gas chromatography mass spectrometry (HS SPME/GC–MS) in order to explore the effects of geographical region on the volatile pattern ciders in addition to identify potential molecular geographic markers. A total of 107 volatile organic compounds (VOCs) belonging to different chemical families were identified from which 50 VOCs are common to all ciders analysed. Significant differences in the relative content of VOCs from ciders of different geographical regions were observed. The potential of the identified VOCs for ciders discrimination according to region was assessed through chemometric tools, such as principal components analysis (PCA) and partial least squares-discriminant analysis (PLS-DA). The PCA showed significant differences among ciders from different island geographical regions. Fifteen VOCs re sponsible for ciders discrimination were identified by PLS-DA. Fifteen VOCs, namely five terpenoids, four al cohols, three acids and three esters, present variable importance in projection (VIP) values higher than one. Our findings provide relevant information related to volatile signature of ciders produced in Madeira Island, which may be a useful tool to cider-making process contributing to improve the quality of the final product. In addition, the geographical discrimination recognizes the unique and distinctive characteristics that will allow in the future to protect the quality and typicity of products originating in certain geographical regions.info:eu-repo/semantics/publishedVersio

Teachers’ Perspectives on CLIL and Classroom Innovation in a Method based on Drama Games

This paper presents an analysis of a set of semi-structured interviews conducted with a group of CLIL and non-CLIL teachers from Germany and Spain on topics related to CLIL and the use of drama games. The purpose of this study is to determine the conceptualizations and attitudes they have about these two methods and the combination of both. We conducted a thematic analysis and a case study, and determined the similarities and differences among the teachers interviewed. We also examined the degree of ‘investment’ (Norton, 2013) they may be willing to make regarding a new method resulting from the project ‘playingCLIL’.Este artículo presenta un análisis de un grupo de entrevistas estructuradas llevadas a cabo con un grupo de profesores CLIL y no-CLIL de Alemania y España. Estas entrevistas incluyen temas relacionados con CLIL y el uso de juegos teatrales. Nuestro propósito con este estudio es determinar las conceptualizaciones y actitudes que tienen acerca de estos dos métodos y de la combinación de ambos. Hemos llevado a cabo un análisis temático y un estudio de casos, y hemos determinado las similitudes y diferencias entre los profesores entrevistados. Además, hemos intentado establecer el grado de investment (Norton, 2013) que pueden tener, de acuerdo con un nuevo método emergente a partir del proyecto ‘playingCLIL’

Efectos del salario mínimo en el mercado laboral de Honduras, 2007-2011

In Honduras as at the regional level in Latin America, this theme of labor market is much addressed empirically lacking computerization of scientific objectivity. Immediately after it, this investigation centres on giving response to this situation by means of his general objectives in order to analyze the effects of the adjustments to the minimum wage in the economically active working population of the labor market, as well as his specific aims, directed in determining the relation of the adjustments to determine the incident to the minimum wage in the working population of the labor market during the period 2007-2011, to estimate the incident of the minimum wage in the visible and invisible underemployment of the economically active population of the labor market and to establish the levels of incident of the above mentioned adjustments in the wage-earning population (I publish, privately and domesticate).In this respect, the investigation develop on the basis of this information of the survey from the Permanent Survey of Homes of Multiple Intentions (EPHPM) of the National Institute of Statistics (INE), under the model use of linear simple regression, descriptive analysis and the support of interviews to experts in the topic. For your part we find that by every lempira of increase to the average monthly minimum wage there are generated 145 busy new ones, of which 64 belong to own account, 42 to familiar not remunerated workers and 39 to public, private employees and I domesticate. Considering that the agriculture, forestry, hunt and fishing is the activity economic that major number of occupied generates with regard to his totality.Revista Portal de la Ciencia, No. 7, diciembre 2014; 107-130En Honduras, como a nivel de América Latina, el tema del mercado laboral es abordado en forma empírica y carente de objetividad científica. En consecuencia, esta investigación se centra en dar respuesta a esta situación con el fin de analizar los efectos de los ajustes al salario mínimo en la población ocupada económicamente activa del mercado laboral, así como determinar la relación de los ajustes al salario mínimo en la población ocupada del mercado laboral durante el período 2007-2011, estimar la incidencia del salario mínimo en el subempleo visible e invisible de la población económicamente activa del mercado laboral y establecer los niveles de incidencia de dichos ajustes en la población asalariada (público, privado y doméstico).En este sentido, la investigación se desarrolló basándose en los datos de la encuesta permanente de hogares de propósitos múltiples (EPHPM) del Instituto Nacional de Estadísticas (INE), bajo el uso de modelos de regresión lineal simple, análisis descriptivo y el respaldo de entrevistas a expertos en el tema. Como parte de los resultados encontramos que por cada lempira de aumento al salario mínimo promedio mensual se generan 145 nuevos ocupados, de los cuales 64 pertenecen a cuenta propia, 42 a trabajadores familiares no remunerados y 39 a asalariados públicos, privados y doméstico; considerando que la agricultura, silvicultura, caza y pesca es la actividad económica que mayor número de ocupados genera respecto a su totalidad.Revista Portal de la Ciencia, No. 7, diciembre 2014; 107-13

Clinical outcome of renal transplant patients after coronary stenting

OBJECTIVE: To assess the clinical outcome of renal transplant patients who developed coronary artery disease and were treated with coronary stenting (TCA-ST). METHODS: A total of 3,334 renal transplants were performed in our service - Hospital do Rim e Hipertensão - HRH (Kidney and Hypertension Hospital) from July, 1998 to November, 2004. During this period, 33 of the renal transplant patients underwent TCA-ST to treat 62 severe stenoses in 54 coronary arteries. A retrospective analysis was performed with renal transplant patients undergoing TCA-ST at HRH. The clinical events were registered using medical charts, medical visits and phone calls. RESULTS: During the 30-month clinical follow-up after TCA-ST, 67% of the patients remained asymptomatic, 18% presented stable angina, 6% presented acute coronary syndrome without ST-segment elevation (ACSWSTE), and 3% presented acute coronary syndrome with ST-segment elevation (ACSSTE). No strokes, CHF or cardiac deaths were observed. Three non-cardiac deaths occurred. A restenosis rate of 9% was observed, which is comparable to those found in studies on drug-eluting stents. CONCLUSION: In conclusion, renal transplant patients who developed CAD and were treated with coronary stenting had a low rate of in-stent restenosis, probably related to the immunosuppressive regimen given to prevent kidney rejection.OBJETIVO: Avaliar a evolução clínica de pacientes submetidos a transplante de rim, portadores de doença arterial coronariana, que foram tratados com implante de stent coronariano (ATC-ST). MÉTODOS: Entre julho de 1998 e novembro de 2004, foram realizados, no total, 3.334 transplantes de rim em nossa Instituição (Hospital do Rim e Hipertensão). Desse total, 33 pacientes previamente submetidos a transplante de rim fizeram ATC-ST para o tratamento de 62 estenoses graves em 54 artérias coronárias, nos quais foi realizada análise retrospectiva. O registro dos eventos clínicos foi feito por meio de análise do prontuário médico, consulta médica e ligações telefônicas. RESULTADOS: No seguimento clínico de 30 meses, após a ATC-ST, observou-se que 67% dos pacientes permaneceram assintomáticos, 18% dos pacientes apresentaram quadro de angina estável, 6% apresentaram síndrome coronariana aguda sem supra de ST e 3% apresentaram síndrome coronariana aguda com supra de ST. Não houve pacientes com acidente vascular cerebral, insuficiência cardíaca congestiva ou morte cardíaca. Houve três mortes não-cardíacas. Foi observado índice de reestenose de 9%, que é comparável ao dos estudos de stent farmacológico. CONCLUSÃO: Concluímos que pacientes submetidos a transplante de rim que desenvolveram doença arterial coronariana e que foram tratados com stent coronariano tiveram baixo porcentual de reestenose clínica, provavelmente relacionado ao regime de imunossupressão administrado para evitar rejeição renal.Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Hospital do Rim e HipertensãoUNIFESP, EPM, Hospital do Rim e HipertensãoSciEL