Ability of new obturation materials to improve the seal of the root canal system: A review

http://www.septodont.ca/sites/default/files/Abstract%20JOE%20Oct%202011%20Acroseal.pdf

Physical Properties and Interfacial Adaptation of Three Epoxy Resin–based Sealers

Pulp‐dentin Biology in Restorative Dentistry

Objective The aim of this study was to evaluate the influence of apical foramen widening on the healing of chronic periapical lesions in dogs' teeth after root canal filling with Sealer 26 or Endomethasone. Study design Forty root canals of dogs' teeth were used. After pulp extirpation, the canals were exposed to the oral cavity for 180 days for induction of periapical lesions, and then instrumented up to a size 55 K-file at the apical cemental barrier. In 20 roots, the cemental canal was penetrated and widened up to a size 25 K-file; in the other 20 roots, the cemental canal was preserved (no apical foramen widening). All canals received a calcium hydroxide intracanal dressing for 21 days and were filled with gutta-percha and 1 of the 2 sealers: group 1: Sealer 26/apical foramen widening; group 2: Sealer 26/no apical foramen widening; group 3: Endomethasone/apical foramen widening; group 4: Endomethasone/no apical foramen widening. The animals were killed after 180 days, and serial histologic sections from the roots were prepared for histomorphologic analysis. Scores were assigned according to preestablished histomorphologic parameters and analyzed statistically by Kruskal-Wallis and Mann-Whitney U tests. Results Regarding new cementum formation, repair of cementum and bone resorption areas, presence of microorganisms, inflammatory cell infiltrate and periodontal ligament conditions, significantly better periapical healing was obtained when foramen widening was done and Sealer 26 was used. Conclusion Apical foramen widening and calcium hydroxide–containing sealer were more favorable to the healing of chronic periapical lesions.

Influence of apical foramen widening and sealer on the healing of chronic periapical lesions induced in dogs' teeth.

In the Pacific Ocean, air and ocean temperatures, atmospheric carbon dioxide, landings of anchovies and sardines, and the productivity of coastal and open ocean ecosystems have varied over periods of about 50 years. In the mid-1970s, the Pacific changed from a cool “anchovy regime” to a warm “sardine regime.” A shift back to an anchovy regime occurred in the middle to late 1990s. These large-scale, naturally occurring variations must be taken into account when considering human-induced climate change and the management of ocean living resources.

From Anchovies to Sardines and Back—Multidecadal Change in the Pacific Ocean

The archival digital preservation is an object of study that proposes standards, regulations, policies, criteria and procedures for digital preservation. To understand the theoretical and methodological approaches that have been published, there was a data collection of references on the subject of preservation
documents into digital files, mainly seeking recent writings related to archival. The digital documents become quickly due to the vulnerability of the digital environment. These are fragile and there is enough security to ensure their long-term digital preservation. This weakness may be in their rapid physical deterioration, obsolescence in technological complexity and costs. The answers to this challenge, there are digital preservation strategies which seek to incorporate all aspects related to this issue: costs, legislation, management, access, policies and criteria. These strategies together partial solutions before a complex problem, being involved, among other things, migration, emulation, archeology digital encryption, metadata, open technologies, open or as XML, HTML, Dublin Core. This descriptive showed that preservation is related to the digital storage capacity, migration and dissemination of information which is most often administered centrally. In order to solve this problem, there have been several proposals today for digital preservation. Including: refresher, Migration, Migration supports analog, update versions; Conversion to competing formats; Standardization; Migration application; Migration distributed; Emulation; Encapsulation; 4.1.5 The Digital Rosetta Stone, Digital Archaeology, Conservation of hardware and software.; Technology free or open as XML, HTML, PDF it, Reprographics. Of preservation strategies presented, it is emphasized that migration along with emulation, are the strategies that have evolved more and more are being used, Ferreira (2011).

https://periodicos.furg.br/biblos/article/download/2654/2395

Documentos Digitais: Preservação e Estratégias

Abstract Ten strains of entomopathogenic ascomycete fungi, sourced from commercial formulations of blastopore or conidiospore formulations, were tested in 14 different formulations in a primary acquisition/direct spray bioassay against adult Asian citrus psyllid ( Diaphorina citr i Kuwayama (Hemiptera: Liviidae)). The Cordyceps ( Isaria ) javanica Apopka 97-C (conidia) strain was used as the standard. A statistical ranking system was established in which top performing pathogenic strains were selected for further screening and eventual field trials. Modified Potter-type spray towers were utilized to deliver a range of doses of viable spores to adult D. citri in an aqueous spray consistent with the rate of spores per hectare often used in real-world spray applications. Mortality was assessed after a seven-day incubation period under controlled climate conditions reflecting those in the Lower Rio Grande Valley (LRGV) of Texas, USA. Of the 14 preparations, the strains Metarhizium anisopliae E9, C. fumosorosea Ifr9901, Beauveria bassiana ATCC 74040 and ANT-03, M. anisopliae ESALQ1037, and M. robertsii DWR2009, showed greater levels of mortality than the standard, Apopka 97-C, in the laboratory setting. Of those six, two (Ifr9901 and ANT-03) were selected for further evaluation based on efficacy, commercial availability, geographical registration, and market outlook on production. 

/pdf/screening-commercial-entomopathogenic-fungi-for-the-3uy9b6ke.pdf

Screening commercial entomopathogenic fungi for the management of Diaphorina citri populations in the Lower Rio Grande Valley, Texas, USA

Tendo em vista o advento do documento digital na Arquivologia em decorrencia dos avancos das Tecnologias da Informacao, surge a necessidade de preservar este patrimonio digital. Desta forma, procedimentos de preservacao digital sao fundamentais para a manutencao da integridade e da autenticidade, alem de garantir o acesso continuo em longo prazo aos documentos arquivisticos digitais. Este artigo tem por objetivo realizar uma reflexao sobre a implementacao de estrategias de preservacao digital considerando sua aplicacao na Arquivologia. A metodologia utilizada consiste na abordagem qualitativa de materiais previamente publicados, desta forma, os dados coletados sao analisados e confrontados a fim de realcar as vantagens e desvantagens das estrategias de preservacao digital abordadas. Os resultados obtidos estao em conformidade com as discussoes de diversos autores, evidenciando que nenhuma estrategia de preservacao digital podera ser implementada de forma isolada. Dentre os avancos mais significativos, destaca-se a convergencia entre as estrategias, apresentando um possivel cenario de interacao e complementacao. Alem disso, essa discussao expoe um maior aprofundamento das vantagens e desvantagens das estrategias abordadas. Desta forma, busca-se fortalecer as teorias de preservacao digital no âmbito da arquivistica.

Estratégias de preservação digital para documentos arquivísticos: uma breve reflexão

Este artigo analisa a utilizacao do Software Livre ICA-AtoM na atividade de descricao arquivistica e acesso por meio da internet ao acervo fotografico do Arquivo Historico Municipal de Santa Maria (AHMSM), RS. Esta ferramenta e amplamente compartilhada e utilizada com sucesso entre os arquivistas canadenses e espanhois, o que abre caminho aos arquivistas brasileiros para adapta-la a realidade arquivistica brasileira e usufruir dos recursos oferecidos por ela. E uma pesquisa exploratoria, descritiva e qualitativa. A revisao da literatura acerca dos requisitos teoricos exigidos para descricao arquivistica e a elaboracao da descricao de parte do acervo fotografico da instituicao possibilitaram uma discussao inicial sobre os aspectos funcionais do software em relacao a essa funcao arquivistica. Constatou-se nesta primeira fase da pesquisa que o ICA-AtoM possui uma gama de recursos tecnicos que flexibilizam e facilitam a atividade de descricao arquivistica; auxilia na preservacao dos documentos originais e na difusao de informacoes sobre o acervo, ao providenciar o acesso a documentacao por meio de representantes digitais, permitindo assim um alcance global atraves de sua interface multilingue na internet. A partir dos resultados obtidos nesta fase da pesquisa, pode-se afirmar que o uso adequado do ICA-AtoM, se aplicado de acordo com os criterios arquivisticos exigidos, pode facilitar atividades e trazer beneficios a instituicao detentora do acervo. As reflexoes decorrentes deste estudo prosseguirao por meio da continuidade da pesquisa, que ja abriu caminho para uma analise posterior de maior espectro sobre a utilizacao do software em outras realidades documentais.

Análise e aplicação do ICA-AtoM como ferramenta para descrição e acesso às informações do Patrimônio Documental e Histórico do município de Santa Maria – RS

Este artigo tem por objetivo discorrer sobre a evolucao da normatizacao acerca dos procedimentos relacionados a conversao de documentos fisicos para o meio digital (digitalizacao) e aos documentos arquivisticos digitais no âmbito da Administracao Publica Federal, sob o vies da legislacao nacional sobre a materia, bem como atraves das Resolucoes aprovadas pelo Conselho Nacional de Arquivos - CONARQ que orientam e estabelecem diretrizes a serem seguidas pelos orgaos e entidades integrantes do Sistema Nacional de Arquivos – SINAR. Nesse sentido, constata-se que a legislacao sobre essa questao, embora recente, embasa e promove o direcionamento para que as instituicoes integrantes do SINAR desenvolvam programas de gestao de documentos de arquivo voltados aos documentos digitais e digitalizados, pois regulamenta e estabelece procedimentos a gestao dos documentos digitais desde a producao, a tramitacao em sistemas informatizados, a preservacao digital e a guarda em repositorios arquivisticos digitais confiaveis, alem de estabelecer parâmetros para garantir a autenticidade, a integridade, a confiabilidade e a disponibilidade, o que garantira a preservacao e o acesso continuo a esses documentos a longo prazo.

/pdf/a-evolucao-da-legislacao-relacionada-a-digitalizacao-e-aos-js5vbqfhao.pdf

Daniel Flores

Papers

Documentos Digitais: Preservação e Estratégias

Screening commercial entomopathogenic fungi for the management of Diaphorina citri populations in the Lower Rio Grande Valley, Texas, USA

Estratégias de preservação digital para documentos arquivísticos: uma breve reflexão

Análise e aplicação do ICA-AtoM como ferramenta para descrição e acesso às informações do Patrimônio Documental e Histórico do município de Santa Maria – RS

A evolução da legislação relacionada à digitalização e aos documentos digitais no âmbito da administração pública federal