7 research outputs found
ESTIMATIVA DA IDADE CRONOLÓGICA HUMANA POR MEIO DA AVALIAÇÃO DO ESTÁGIO DE MINERALIZAÇÃO DOS 3º MOLARES
Apesar de existirem métodos eficazes para estimar a idade cronológica de indivíduos vivos ou mortos, nem sempre esses métodos podem ser executados. Apesar de alguns estudos apontarem uma possível aplicação da avaliação do desenvolvimento dos terceiros molares na identificação cronológica, sua a utilização ainda necessita de maiores comprovações
LOCALIZAÇÃO RADIOGRÁFICA PELO MÉTODO DE CLARK: PRINCÍPIOS E INDICAÇÕES
A determinação do posicionamento de dentes retidos e impactados, corpos estranhos, e condutos radiculares são de grande importância para o planejamento de tratamento cirúrgicos e endodônticos em odontologia. As radiografias convencionais são exames de baixo custo associadas à baixas doses de radiação, valendo ressaltar que são exames de fácil execução no próprio consultório odontológico. No entanto, estes exames apresentam como limitação a produção de imagens bidimensionais, apenas com representação da largura e altura das estruturas. Existem modificações desses exames que representam uma maneira de diminuir essas desvantagens
Approaches in biotechnological applications of natural polymers
Natural polymers, such as gums and mucilage, are biocompatible, cheap, easily available and non-toxic materials of native origin. These polymers are increasingly preferred over synthetic materials for industrial applications due to their intrinsic properties, as well as they are considered alternative sources of raw materials since they present characteristics of sustainability, biodegradability and biosafety. As definition, gums and mucilages are polysaccharides or complex carbohydrates consisting of one or more monosaccharides or their derivatives linked in bewildering variety of linkages and structures. Natural gums are considered polysaccharides naturally occurring in varieties of plant seeds and exudates, tree or shrub exudates, seaweed extracts, fungi, bacteria, and animal sources. Water-soluble gums, also known as hydrocolloids, are considered exudates and are pathological products; therefore, they do not form a part of cell wall. On the other hand, mucilages are part of cell and physiological products. It is important to highlight that gums represent the largest amounts of polymer materials derived from plants. Gums have enormously large and broad applications in both food and non-food industries, being commonly used as thickening, binding, emulsifying, suspending, stabilizing agents and matrices for drug release in pharmaceutical and cosmetic industries. In the food industry, their gelling properties and the ability to mold edible films and coatings are extensively studied. The use of gums depends on the intrinsic properties that they provide, often at costs below those of synthetic polymers. For upgrading the value of gums, they are being processed into various forms, including the most recent nanomaterials, for various biotechnological applications. Thus, the main natural polymers including galactomannans, cellulose, chitin, agar, carrageenan, alginate, cashew gum, pectin and starch, in addition to the current researches about them are reviewed in this article.. }To the Conselho Nacional de Desenvolvimento Cientfíico e Tecnológico (CNPq) for fellowships (LCBBC and MGCC) and the Coordenação de Aperfeiçoamento de Pessoal de Nvíel Superior (CAPES) (PBSA). This study was supported by the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UID/BIO/04469/2013 unit, the Project RECI/BBB-EBI/0179/2012 (FCOMP-01-0124-FEDER-027462) and COMPETE 2020 (POCI-01-0145-FEDER-006684) (JAT)