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Objective Facial asymmetries are common, especially deviated nose and chin. The clinician must consider these variables when establishing the smile, placement and angulation of the occlusal plane. The purpose of this article is to determine if nose and chin deviations affect the perception of laypeople towards different angulations of the occlusal plane cant. Materials and Method An asymmetric facial model was created from a symmetric facial model used in a previous study. Nose and chin were deviated 3 mm to the left and eight different pictures were created, each with different degrees of occlusal plane cant in both direction. Using a visual Likert scale delivered via Websurvey within the private practice setting, 120 randomly selected laypersons evaluated each image according to their own beauty preferences. Results In an asymmetric face, nose and chin deviated 3 mm to the left, a minor occlusal plane angulation of 2° can be perceptible regardless of the direction of the cant. Conclusions The occlusal plane should be as parallel to the interpupillary line as possible. If occlusal cant is present, less than 2° of angulation it is preferable, regardless of the direction of the nose and chin. Clinical Significance In the presence of an asymmetric face, the occlusal plane should be as parallel as possible to the interpupillary line. The direction of the deviation of the nose and the chin are irrelevant factors to determine the occlusal plane. An inclination of the occlusal plane can cause vertical discrepancy, which could subsequently create malocclusion. A complete dentofacial analysis can aim at assessing the angulation of the occlusal plane not only for esthetic outcomes, but for also allowing correct occlusal function.

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Objective Our study evaluated the performance of different two-chambered microbial fuel cell (MFC) prototypes, operated with variable distance between electrodes and Nafion membrane and specific inoculum concentration, applied for vinasse treatment. Results The performance of the developed MFC resulted in a maximum current density of 1200 mA m-2 and power density of 800 mW m-2 in a period of 61 days. MFC performed a chemical oxygen demand removal at a rate ranging from 51 to 60%. Conclusions Taking our preliminary results into consideration, we concluded that the MFC technology presents itself as highly promising for the treatment of vinasse.

Hydroxyurea (HU) crystals were investigated using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations combined with experimental optical absorption spectroscopy. The crystal properties were related to those of a single hydroxyurea molecule. Their electronic structures and optical response functions were obtained. The generalized gradient and local density approximations were employed and compared by including a dispersion correction scheme for obtaining an accurate description of the geometric and electronic structures of the HU crystal. A very good agreement between the optimized structures and those determined previously by X-ray diffraction, as well as between the computed optical-electronic properties and the optical absorption measurements, was obtained. The DFT calculated bandgap was of 5.03 eV, 0.30 eV less than the estimated experimental gap of 5.33 eV, while the use of the Δ-sol scheme to correct the bandgap predicted a value of 5.47 eV. For the molecule, the gap calculated using TD-DFT was 7.30 eV. The calculated optical absorption and complex dielectric functions are shown to be anisotropic with respect to the polarization state of the incident light.