Aspectos morfoanatômicos de Eleocharis laeviglumis (Cyperaceae) ocorrente em ambiente contaminado e não contaminado por Drenagem Ácida de Mina (DAM)

TCC(graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Biológicas. Biologia.A mineração de carvão é uma atividade utilizada por indústrias siderúrgicas para geração de energia elétrica. Porém, os impactos desse processo vêm afetando consideravelmente o meio ambiente, através da liberação de efluentes, como a drenagem ácida de mina (DAM), ricos em metais pesados. Este trabalho analisou comparativamente a morfoanatomia de espécimes da macrófita Eleocharis laeviglumis ocorrente naturalmente em ambiente contaminado (DAM+), coletados em Siderópolis/SC, Lagoa Língua do Dragão, e ambiente não contaminado (DAM-), coletados em Florianópolis/SC, Lagoa Pequena. Amostras do escapo floral, rizoma e raízes foram fixados e processados de acordo com técnicas usuais em anatomia vegetal. No escapo, foram mensurados altura, diâmetro, área total, área proporcional do aerênquima em secção transversal (AA), altura total do parênquima paliçádico (APP) e da sua da camada mais externa (ACE) e densidade estomática (DE). No escapo, rizoma e raízes foram realizados testes histoquímicos padrão. Morfologicamente os indivíduos DAM(+) apresentam menor altura, maior diâmetro e maior área total do escapo, e anatomicamente, mostram menor APP, ACE, DE e maior AA em relação aos indivíduos DAM(-). A redução do tecido fotossintetizante em DAM(+) pode estar associada ao excesso de Fe disponível, o qual tende a interferir na distribuição de cálcio, essencial para a constituição das paredes celulares. O aumento da AA e diminuição da DE podem ser estratégias compensatórias para armazenar oxigênio e reduzir a área de transpiração, respectivamente, em condições de hipóxia. Os testes histoquímicos revelaram diferenças qualitativas entre os indivíduos analisados, quanto às fibras subepidérmicas do escapo, que apresentam-se mais espessadas em DAM(-), e raiz dos indivíduos DAM(-), cujas células da endoderme e exoderme apresentam-se lignificadas, o que não ocorreu em DAM(+). Os resultados obtidos indicam que E. laeviglumis é tolerante a DAM, apresentando variações estruturais em relação aos indivíduos ocorrentes em ambiente não contaminado por DAM

Los valores patrióticos y Malvinas en dos obras de Juan Luis Gallardo

El presente trabajo aborda dos obras de Juan Luis Gallardo: "El penúltimo ataque" y "Las Lecciones del capitán", y trata de rescatar en ellas los valores patrióticos que el autor ha tratado de reflejar, sobre todo puntualmente con Malvinas. Se establecen diferencias de modalidades discursivas y la confluencia de temas comunes. Se prevé una valoración de la adecuación de estas obras en relación a la literatura juvenil.Fil: Brandalise, Antonio Fabián. Universidad FAST

Laparoscopic treatment of giant circumferential leiomyoma of the distal esophagus

Introduction: Leiomyomas are rare esophagus tumors, with 0.4-1% incidence of all esophagus tumors, being more frequent in medium and distal portions1. Only 5% grow to the point of being called giant tumors, measuring more than 10cm2. Symptoms usually begin on tumors equal to or bigger than 5cm. Objectives: The following case objectifies reporting a new therapeutic course of action to giant leiomyomas of distal esophagus. Case Report: VCA, female, 38 years old, presented retrosternal oppression for 4 months. Having realized a computed tomography (CT) on another service 5 days ago which demonstrated a tumor injury on the distal esophagus and suggestive of leiomyoma. Patient was submitted through endoscopy exam 4 months ago, for complaint of heartburn and mild dysphagia. It was determined a hiatal hernia of 2cm and mild gastritis. Patient was submitted to complete excision of tumor without mucosal lesion and reconstruction of the external muscular wall, by the video laparoscopic method. Hiatoplasty and partial esophagogastrogemorplication were associated. The anatomic pathological examination confirmed the leiomyoma, with 10x5x2cm. Patient evolved clinically in the long term without the appearance of the heartburn or dysphagia. The patient underwent contrast examination of the esophagus after 6 months and endoscopy and tomography for the following 4 years, all normal. The classic treatment of giant leiomyomas larger than 10cm, includes thoracotomy with esophagectomy. Considering that in 80% of the cases it is found in the middle and lower thirds of the esophagus, the videolaparoscopic approach by transhiatal route becomes possible3. The reconstruction of the external muscular layer is important to prevent a possible prolapse of the mucosa1. Also, the realization of the fundoplication in addition to avoiding the gastroesophageal reflux, allows the suture area of the esophageal muscular wall to be covered, increasing the safety in the treatment4. In services with experience in the surgical treatment of diseases of the gastric esophagus transition through the videolaparoscopic method, it is possible to perform with adequate safety the surgical treatment of the tumor lesions of the distal esophagus. The method provides the patient with greater postoperative comfort and prompt clinical surgical recovery

Laparoscopic treatment of giant circumferential leiomyoma of the distal esophagus: relato de caso

Introdução: O leiomioma é um tumor de esôfago raro, com incidência de 0,4-1% dos tumores de esôfago. Apenas 5% crescem a ponto de serem denominados gigantes, maiores do que 10 cm. Sintomas costumam surgir nos tumores iguais ou maiores que 5 cm. Objetivo: Relatar um novo curso de ação terapêutica para leiomiomas gigantes do esôfago distal. Caso Clínico: VCA, sexo feminino, 38 anos, apresentava há 4 meses sensação de opressão retroesternal. Realizou tomografia computadorizada(CT) em outro serviço demonstrando lesão de esôfago distal sugestivo de leiomioma. No exame de endoscopia, realizado por queixa de azia e leve disfagia, foi determinado hiato alargado em 2cm e gastrite leve. Paciente submetida a exérese de lesão tumoral íntegra sem lesão mucosa e reconstrução da parede muscular externa, pelo método videolaparoscópico. Associou-se hiatoplastia e esofagogastrofundoplicatura parcial. O exame anátomo patológico confirmou o leiomioma, com 10x5x2cm. Evolução: Evoluiu clinicamente a longo prazo sem o aparecimento de azia ou disfagia. Submetida a exame contrastado do esôfago após 6 mese, tomografia e endoscopias de controle pelos próximos 4 anos, todos normais. Discussão: O tratamento clássico do leiomioma gigante inclui toracotomia com esofagectomia. Considerando que em 80% dos casos a lesão se encontra nos terços médio e inferior do esôfago, a abordagem videolaparoscópica por via transhiatal se torna possível. A reconstrução da muscular externa é importante para prevenir um possível prolapso da mucosa. A realização da fundoplicatura além de evitar o refluxo gastroesofágico, possibilita que a área de sutura da parede muscular do esôfago seja recoberta, aumentando a segurança no tratamento. Comentários Finais: Em serviços com experiência na realização de tratamento cirúrgico das doenças da transição esôfago gástrica pelo método videolaparoscópico, é possível realizar tal o tratamento cirúrgico com adequada segurança. O método proporciona ao paciente um maior conforto pós operatório e pronta recuperação clínico cirúrgica.Introduction: Leiomyomas are rare esophagus tumors, with 0.4-1% incidence of all esophagus tumors. Only 5% grow to the point of being called giant tumors, measuring more than 10cm. Symptoms usually begin on tumors bigger than 5cm. Objective: Reporting a new therapeutic course of action to giant leiomyomas of distal esophagus. Case Report: VCA, female, 38 years old, presented retrosternal oppression for 4 months. Having realized a computed tomography on another service which demonstrated a mass suggestive of leiomyoma. On the endoscopy exam, performed for heartburn complaint and mild dysphagia, was determined a hiatal hernia of 2cm and mild gastritis. Patient submitted to complete excision of tumor without mucosal lesion and reconstruction of the external muscular wall, by the video laparoscopic method. Hiatoplasty and partial esophagogastrofundoplication were associated. The anatomic pathological examination confirmed leiomyoma, with 10x5x2cm. Patient evolved clinically without the appearance of the heartburn or dysphagia. With contrast examination of the esophagus after 6 months and endoscopy and tomography the following 4 years, all normal. The classic treatment of giant leiomyomas, includes thoracotomy with esophagectomy. Considering that in 80% of the cases it is found in the middle and lower thirds of the esophagus, the videolaparoscopic approach by transhiatal route becomes possible. The reconstruction of the external muscular layer is important to prevent a possible prolapse of the mucosa. Also, the realization of the fundoplication in addition to avoiding the gastroesophageal reflux, allows the suture area of the esophageal muscular wall to be covered, increasing the safety in the treatment. In services with experience in the surgical treatment of diseases of the gastric esophagus transition through the videolaparoscopic method, it is possible to perform with adequate safety the surgical treatment of the tumor lesions of the distal esophagus. The method provides greater postoperative comfort and prompt clinical surgical recovery

A typology for describing and assessing Visual Management in construction projects

Visual Management (VM) is a strategy for making information clear and accessible, strongly related to the lean production principle of increasing process transparency. VM also presents a very important role in promoting effective communication and seamless collaboration among team members. It is not an end but consists of practices that improve production system performance. VM practices include both VM devices (the observable portion of a managerial system) and the non-visual work involved in producing information. VM system is a set of interconnected practices deliberately designed to facilitate information sharing. This set of practices must be complementary and have common purposes, which increases the impact of VM, in comparison to isolated VM practices. Therefore, VM seems to be particularly useful for supporting the management of construction projects that can be considered a complex sociotechnical system, in which many dynamically interacting elements combined with their wide diversity may cause unanticipated variability and asset resilience. Several studies about VM in construction have been developed. However, instead of being based on a sound theoretical basis, VM tends to be implemented in construction projects mostly through efforts made by trial and error, many times only copying applications from other contexts such as manufacturing. Hence, there is a need to broaden the development of theory building related to VM. Moreover, it is also important to find innovative ways of disseminating related concepts by active methodologies, such as serious games. The aim of this thesis is to propose a typology for describing and assessing VM in construction projects. Design Science Research is the methodological approach adopted in this investigation, which is based on three academic papers. The first paper develops the first version of the typology, extending the contribution of taxonomies previously proposed in the literature, by emphasizing the role of collaboration and communication, as well as the need to integrate VM practices into managerial routines and other practices. The second paper is focused on a serious game, named VM Game. It is a tool for learning and discussing a set of VM taxonomies regarding purposes, the role of communication, the role of collaboration, and requirements. The third paper devises some propositions to explain the role and impact of VM systems in construction projects, highlighting their purpose and how they support dealing with complexity. Therefore, the typology could be refined to a final version, with ten types of analysis divided into three main levels, from a lower to a higher level of complexity and context-dependence: VM device, practice, and system. The target audience for using the artifacts devised in this investigation is the academic community interested in advancing the prescriptive knowledge on VM, besides construction companies that use VM as a strategy for information management

Volatility behavior of virtual currencies

In order to do a volatility analysis, since the exchange rate is higher than the average risk, the higher the average rate of return, the higher the average growth rate of the year. applied the method of data analysis. An attempt to volatility analysis can be made in one year, in the middle of the end of 2016

É POSSÍVEL APRENDER A METODOLOGIA DA RESOLUÇÃO DE PROBLEMAS NUM CURSO DE LICENCIATURA EM MATEMÁTICA A DISTÂNCIA?

Este artigo traz um reflexão teórico-prática a respeito do estudo da metodologia da resolução de problemas num curso de formação inicial de professores de Matemática na modalidade a distância. A pesquisa qualitativa, de cunho exploratório-descritivo, objetivou identificar se é possível aprender a metodologia da resolução de problemas num curso de Licenciatura a distância e adotou como procedimento de coleta a análise documental das atividades realizada pelos alunos no ambiente virtual de aprendizagem. Analisando-se as tarefas postadas pelos pelos acadêmicos na disciplina de Instrumentação para o Ensino da Matemática IV, ofertada no curso no segundo semestre de 2010 foi possível observar as formas diferenciadas de resolução dos problemas propostos o que possibilitou concluir a importância dessa vivência pelo futuro professor de Matemática

Analysis of economic viability with the use of monte carlo simulation for microgeneration of photovoltaic energy

A series of public policies are being adopted worldwide to seek greater participation of renewable energy sources in the energy matrix. Brazil is a country that has a predominantly renewable energy source, with hydroelectric energy being responsible for the largest portion, but with enormous potential to be exploited for solar energy. The objective of this study was to carry out an analysis of the economic viability of a photovoltaic matrix in the distributed microgeneration model from the residential consumer perspective. Through the Monte Carlo simulation, 10.000 iterations were performed and the NPV was calculated in each of them, then counted to recover the corresponding output probability distribution and verified the NPV probability to be greater than zero. The developed method has proved to be a reliable tool to support decision making and can be applied to several scenarios. The scenario adopted for the design of the photovoltaic system presented a 95.2% probability of returning with an NPV above zero and this makes it economically feasible. The main contribution of this paper is the replicability of the methodology used for other economic analysis studies