Universidade Positivo

About: Universidade Positivo is a education organization based out in Curitiba, Brazil. It is known for research contribution in the topics: Population & Biodiversity. The organization has 1290 authors who have published 1237 publications receiving 9335 citations. The organization is also known as: Positive University.

Functional leaf traits of 57 woody species of the Araucaria Forest, Southern Brazil

Abstract: The objective of this study was to evaluate the leaf morphology of 57 tree species to determine if there is a dominant leaf pattern in a remnant of the Araucaria Forest, Curitiba, PR, Brazil that can be used as ecological indicator of this forest. We also determined the quantitative morphological and anatomical traits of all species, distributed in 4 different strata, to identify a dominant leaf type of each stratum, regarding light exposure. Thirty mature leaves were collected for each species and were classified morphologically. Leaf area and size, dry mass, specific leaf area, stomata density, total thickness of leaf blade, epidermis, palisade, and spongy parenchyma thickness were also analyzed. Leaves with entire margin, acuminate apex, and microphyllous were predominant among the studied species. All of them presented hypostomatic leaves, except Araucaria angustifolia. All 57 species presented thin leaves and high specific leaf area, indicating mesophyll, characteristic of rain forests as observed in studies in similar dense forests. Low light intensity, in understory species, appears to be determinant of leaf morphology and anatomy differences, associated to high rainfall and relatively low temperature of the study area, both being the characteristics of this Atlantic Forest formation. Considering the results, no specific leaf pattern for the Araucaria Forest was found. Only the lowest stratum showed more differences comparing with the others, and no specific leaf trait could be correlated to light exposure in the present study.

Cosmetic Remodeling of the Smile: Combining Composite Resin and Ceramics over Teeth and Implants.

Abstract: The aim of this paper is to describe a restorative approach to the cosmetic remodeling of the teeth of a young adult patient with right maxillary lateral hypodontia and left lateral microdontia. A conservative restorative management was proposed to improve smile esthetics by combining direct composite resins and ceramics. Initially, periodontal therapy and dental bleaching were performed. Subsequently, direct composite resins were applied to the central incisors and canines to reestablish the sizes and shapes of these teeth. Finally, ceramics were placed on the implant and the microdontia to unite with the new alignment and color of the anterior teeth. Thus, conservative remodeling to improve the harmony of the smile was provided.

Caracterização das propriedades de pasta e térmicas de amidos de feijão branco, carioca, fradinho e preto

Abstract: Resumo O amido e um carboidrato encontrado em abundância na natureza, podendo ser extraido de diversas fontes botânicas. Este polimero natural possui potencial aplicacao em diversos ramos da industria com destaque para o ramo alimenticio. O feijao e altamente consumido e produzido no Brasil, porem existem muitas perdas devido as condicoes de armazenamento inadequadas. Devido a isso a extracao do amido dos feijoes que tiveram sua qualidade prejudicada e uma opcao encontrada para reduzir o desperdicio. O amido de feijao pode ser aplicado em diversos processos tecnologicos. Para isso seu comportamento deve ser estudado e conhecido, por meio de tecnicas que determinam suas propriedades de pasta, termica e de degradacao quando submetido ao calor. Abstract Starch is an abundant carbohydrate in nature and can be extracted from several botanical sources. This natural bio-polymer has many industrial applications, mainly in the food sector. Beans are highly consumed and produced in Brazil, but there are many losses due to inadequate storage conditions. One option to reduce losses is to isolate the bean starch, which can then be applied in many technological processes. For that its behavior must be studied and known, by techniques that determine the paste property and the thermal degradation. Keywords: beans, Phaseolus vulgaris , Vigna unguiculata Trabalho SiAT 24 CARACTERIZACAO DAS PROPRIEDADES DE PASTA E TERMICAS DE AMIDOS DE FEIJAO BRANCO, CARIOCA, FRADINHO E PRETO. Trabalho apresentado no VII SiAT – Simposio de Analise de Termica realizado no periodo de 19 a 21 de julho de 2015 em Bauru, na Faculdade de Ciencias – UNESP.

Topographic outcomes after corneal collagen crosslinking in progressive keratoconus: 1-year follow-up.

Abstract: Purpose: We aimed to report and analyze topographic and refractive outcomes following corneal collagen crosslinking (CXL) in patients with progressive keratoconus (KC). Methods: We performed a retrospective, analytical, and observational study of 100 eyes from 74 progressive KC patients who underwent CXL at the Eye Hospital of Parana. Keratometric values were analyzed preoperatively as well as 3 and 12 months postoperatively. Results: For a total of 100 eyes, 68 belonged to male patients. The mean age of our study population was 19.9 ± 5.61 years. The average visual acuity and topographic parameters overall were stable after 1 year (p<0.05). After 3 months, steepest keratometry reading (K2) and maximum keratometry (Kmax) were significantly decreased (p<0.05). Regarding topographic astigmatism (dK), there was no significant difference between the 3-month and 12-month follow-ups. When we made comparisons between genders following CXL, there were no significant differences related to the changes in Kmax, K2, and spectacle-corrected distance visual acuity (SCDVA). Conclusions: CXL promoted stabilization or improvement of keratometric values and visual acuity. We found that keratoconus apex stability may be achieved 3 months after the procedure. There was no significant difference in keratometric and refractive values measured between male and female patients.

Trigeminal neuralgia recurrence: a comparison of microvascular decompression and percutaneous balloon compression: a five years follow-up study

Abstract: Background: About 50% of patients that suffer from trigeminal neuralgia do not experience sustained benefit from the use of oral medication. For their adequate management, a few surgical procedures are available. Of these, percutaneous balloon compression (PBC) and microvascular decompression (MD) are two of the most performed worldwide. In this retrospective study, we present the outcomes of these techniques through estimation of initial pain relief and subsequent recurrence rate. Methods: Thirty-seven patients with medically refractory trigeminal pain surgically treated at Hospital Cajuru, Curitiba, Brazil, with PBC, MD or both between 2013 and 2018 were enrolled into this retrospective study. The post-procedural rate for pain relief and recurrence and associations between patient demographics and outcomes were analyzed. Results: MD had an earlier recurrence time than balloon compression. Of the 37 patients, the mean age was 61.6 years, approximately one third were male and most had type I neuralgia. The most affected branch was the maxillary (V2). The time for recurrence after surgery was on average 11.8 months for PBC and 9.0 months for MD. Complications were seen only with microsurgery. Conclusions: MD presented with a more precocious recurrence of pain than PBC in this article. Moreover, it had a higher recurrence rate than described in the literature as well, which is possibly explained by the type of graft (muscle) that was used to separate the neurovascular structures.