Accuracy of clinical diagnosis for the identification of potentially malignant disorders and malignant lip lesions

The aim of this study was to assess the accuracy of clinical diagnosis for lip lesions based on sensitivity and specificity. The retrospective analysis focused on the detection of lesions caused by potentially malignant disorders (PMDs) and malignant lesions (n = 1195). All cases were classified as benign, PMD, and malignant lesions. Concordance between diagnoses based on clinical examination and those based on histopathological analysis was assessed, and accuracy for the identification of PMD and malignant lesions was calculated. Histopathological analysis revealed 44 lesion types; PMD and malignant lesions comprised 8.3% of all cases. Compared with histopathological analysis, clinical examination showed 97.4% accuracy for the identification of non-malignant and potentially malignant/malignant cases. Degrees of specific sensitivity ranged from 34% to 77% for different lesions, and were highest for autoimmune (77%) and reactive (72%) lesions. Positive and negative predictive values for the identification of PMD and malignant lesions were 81.9% and 98.9%, respectively. Clinical examination showed a high degree of accuracy for the detection of PMD and malignant lip lesions, indicating good reliability

Plaster Layout Process in Civil Works with a Focus on Clean Production

The constant expansion of civil construction and the increasing use of plaster gives rise to a solid waste generation problem causing difficulties for the disposal or reuse of this material. The generation of plaster waste represents an economic problem, with serious consequences and impacts. In order to contribute to sustainability, this study sought to evaluate the reduction of plaster waste in an apartment construction project, employing the layout method. With the adequate arrangement of plates, a reduction of 4.41% in the use of plaster could be obtained, This reduction will consequently result in the minimization of waste from civil works, bringing invaluable economic and environmental benefits

Adsorption and incorporation of the zinc oxide nanoparticles in seeds of corn: germination performance and antimicrobial protection

The treatments of the seeds are important procedures applied by the agronomical area to improve the culture yield. From these procedures the micronutrients are available for the seeds before and during the germination stages. One high challenge is make efficient these treatment processes and to ensure the adsorption and the incorporation of these micronutrients in the seeds and to improve its performance in the germination phase. In this work studies explored the optimization of the incorporation process and the characteristics of the zinc oxide clusters adsorbed on the surface of the seed. The results were associated with the agronomic responses during the germinations stages of the seeds of corn. The seeds were treated in suspensions containing different concentrations of nanoparticles of zinc oxide and during different treatment times. The adsorptions in the corn surface and the absorption of the nanoparticles for the inner of the seeds were studied together with its antibacterial characteristics and correlated with the germinations indicators. The results showed that is possible to incorporate nanoparticles of zinc oxide in inner of the seeds of corn and improve the germinations indicators. Antibacterial protection was aggregated on the seeds of corn. It´s possible to incorporate 0.280 mg of zinc oxide nanoparticle per seed mass in inner of seeds with the optimal treatment conditions with nanoparticle concentration of 50 mg/L in the suspension and with treatment time of 180 minutes. With the optimal treatment concentration the normal plant percentage increase of 2.70% in relationship to the seeds not treated

Propriedades qualitativas e quantitativas da cevada submetida ao tratamento de sementes com nanopartículas de óxido de zinco

A cevada apresenta potencial produtivo para diversas regiões do País, porém seu cultivo ainda é limitado em razão de problemas quanto à incidência de moléstias e à elevada exigência nutricional que restringe a produção, como a deficiência de zinco. O presente estudo teve como objetivo avaliar os efeitos do tratamento de sementes de cevada com nanopartículas de óxido de zinco (ZnO). O delineamento experimental foi de blocos completos ao acaso em esquema de parcela subdividida (2 x 4 x 6), com três repetições, em que foram alocados os cultivares ANAG 01 e BRS BRAU, o tempo de exposição às nanopartículas foi de 90, 180, 270 e 360 minutos e as concentrações foram de 0 mg/L, 75 mg/L, 150 mg/L, 225 mg/L, 300 mg/L e 375 mg/L. Foram realizadas avaliações da cultura: teor de clorofila, número de grãos por espiga, número de afilhos por linha, número de espigas por linha, área foliar dos afilhose rendimento. Para as variáveis teor de clorofila, área foliare rendimento somente os cultivares diferiram significativamente. O número de grãos por espiga apresentou interação cultivar versus tempo de aplicação. As variáveis número de afilhos e de espigas por linha apresentam interação dos fatores tempo e concentração. Em face dos resultados obtidos há necessidade de maior aprofundamento no estudo para padronizar tempo e concentração em relação aos cultivares utilizados, para, assim, averiguar possíveis efeitos de sua utilização em tratamentos para sementes de cevada.Palavras-chave: Hordeum vulgare L. Nanotecnologia. Nutrição. Óxido de zinco