Energy balance for ethyl alcohol production from crops

Energy requirements to produce ethyl alcohol from three different crops in Brazil (sugarcane, cassava, and sweet sorghum) were calculated. Figures are presented for the agricultural and industrial phases. The industrial phase is always more energy-intensive, consuming from 60 to 75 percent of the total energy. Sugarcane is the more efficient crop for ethyl alcohol production, followed by sweet sorghum and cassava from a net energy viewpoint. The utilization of sweet sorghum stems might increase the total energy gain from this crop to almost the same level as sugarcane. Cassava has a lower energy gain at the present state of agriculture in Brazil. Copyright © 1978 AAAS.

Optical parameters and crystallization of flash evaporated amorphous gallium antimonide films

Flash-evaporated GaSb films are analysed using a combination of optical, surface and x-ray diffraction techniques. The effects of thermal annealings on nearly stoichiometric GaSb films are studied.

Cone-beam evaluation of pharyngeal airway space in class I, II, and III patients

The purpose of this study is to make a 3-dimensional (3-D) evaluation of the pharyngeal airway space (PAS) in patients with class I, II, and III malocclusion. Sixty patients were evaluated. The patients were divided in 3 groups according to their occlusion classification. The volume and area of PAS were evaluated using the software Dolphin 3-D Imaging in the preoperative period for orthognathic surgery. PAS volume and area were influenced by different patterns of malocclusion. The mean volume and area for class III patients were statistically bigger than for classes I and II patients (P < .001). There was also a significant difference for volume values between class I and II patients, being the bigger volume for the class I patients (P < .05). It was possible to conclude that the class III patients presented a bigger PAS compared with classes I and II patients.

Determination of furanic aldehydes in sugarcane bagasse by high-performance liquid chromatography with pulsed amperometric detection using a modified electrode with nickel nanoparticles

A glassy carbon electrode chemically modified with nickel nanoparticles coupled with reversed-phase chromatography with pulsed amperometric detection was used for the quantitative analysis of furanic aldehydes in a real sample of sugarcane bagasse hydrolysate. Chromatographic separation was carried out in isocratic conditions (acetonitrile/water, 1:9) with a flow rate of 1.0 mL/min, a detection potential of -50 mV vs. Pd, and the process was completed within 4 min. The analytical curves presented limits of detection of 4.0 × 10(-7) mol/L and 4.3 × 10(-7) mol/L, limits of quantification of 1.3 × 10(-6) and 1.4 × 10(-6) mol/L, amperometric sensitivities of 2.2 × 10(6) nA mol/L and 2.7 × 10(6) nA mol/L for furfural and 5-hydroxymethylfurfural, respectively. The values obtained in this sample by the standard addition method were 1.54 ± 0.02 g/kg for 5-hydroxymethylfurfural and 11.5 ± 0.2 g/kg for furfural. The results demonstrate that this new proposed method can be used for the quick detection of furanic aldehydes without the interference of other electroactive species, besides having other remarkable merits that include excellent peak resolution, analytical repeatability, sensitivity, and accuracy.

Micromundo hipertextual & educação matemática

Pós-graduação em Educação Matemática - IGCE

Crystallization process of amorphous GaSb films studied by Raman spectroscopy

Thermal annealings of amorphous gallium antimonide films were accompanied using Raman spectroscopy, both for stoichiometric and nonstoichiometric compositions. The films were prepared by flash evaporation on silicon substrates. Structural changes were induced by the heat treatments: an increasing degree of crystallization as a function of the annealing temperature is observed. Sb clusters are found to crystallize before GaSb does, and the dependence of the corresponding Raman peak intensity with the annealing temperature (occurring in two regimes) is explained. A mechanism for the crystallization of the amorphous GaSb is proposed, based on the prior migration of the Sb excess outside the GaSb region to be crystallized. © 1995 American Institute of Physics.

Epidemiological aspects of dog bites considering biter dogs and victims

The aim of this study was to characterize dog bites using data on biter dogs and victims. An exploratory cross-sectional study was performed using 203 records of individuals who had attended in public health services in 2009 in the municipality of Araçatuba, São Paulo, Brazil, after they had been bitten by a dog. Over 70% (92/129) of the biter dogs were male and most of them (71%) received as a gift. Dog owners reported companionship as the main reason for acquiring the dog. The victims who were children were predominantly male, while the victims who were elderly were predominantly female. Most children were bitten on the head/neck, while adults were bitten on the hands/feet and lower limbs (p<0.0001). The owner of the dog was known in 83.2% of cases. However, rabies observation of the biter dog following the attack was only reported in 59.4% of cases. Situations involving aggression were related to dogs having escaped from their home (18.7%) or roaming free on the streets (17.0%). The analysis of biting dog characteristics using information obtained from dog bite victims and biting dog owners can help direct the medical treatment for dog bite victims. Moreover, concepts of responsible dog ownership can reduce the occurrence of bites.

Análise da percepção de desconforto em diferentes regiões dos pés

The comfort is is an important feature for acquiring shoes. Matching this product to the characteristics of their customers is one of the requirements for a comfortable shoe. In this study, there were evaluated the discomfort perception in different parts of the feet by obese and nonobese volunteers.

Antropometria da mão humana: influência do gênero no design ergonômico de instrumentos manuais

The wrong sizing of handle instruments can generate ergonomic problems. To know the anthropometry of the hands is indispensable for a correct sizing, especially how much the gender influences in this aspect. The objective of this study was quantitatively to evaluate the influence of the sort in the anthropometry of the hand human being. The results indicate that the differences are significant and that this factor must be considered in design of manual instruments.

A linguagem do espaço-tempo

This study sought to offer a didactic approach in relation with the fundamentals of cubism temporal space derived of the theory of relativity, since the exhaustive character on the matter considering the need for a more consistent explanation of the physics Einsteinium postulates which is not an exactly research theme, despite being at its heart.

Mondrian e o percurso de uma poética

This dissertation titled Mondrian “The Way of Poetry” was developed during the period of the first half of 1991 to the first half of 1993 in the Graduate course “ Projeto, Arte e Sociedade “, in the Visual Poetics area of concentration.This paper proposed the approach of determinism versus creative activity in the course of the work of Mondrian which conventionalized the term “The Way of Poetry.”

O design diferencial de Aloisio Magalhães

This article presents some definitions about design concepts and makes a comparison of Aloísio Magalhães’performance, a brazilian designer considered for many authors one of the most influential 20th century designers. By reviewing the bibliography, it is possible to evidence and debate the engagement and the perspicuity of Aloísio Magalhães, related to his job. This article also presents a short view about life and works of this designer.

Bauhaus: conjuntura política e trajetórias

The Bauhaus began its activities in 1919, in Weimar - Germany, under the direction of architect Walter Gropius, as an association of craftsmen without distinction. For his inclusive approach, its professors were many artists, architects and craftsmen from different ideals. Thus were brought together painters, sculptors, decorators, architects and other professionals from many different locations. With their existence tied to political events of the interwar period, this school has several limitations and had to move its headquarters several times. The aim of this paper is to report briefly the main events in the short existence of this school forerunner of contemporary design.

Um estudo sobre o desenho aplicado ao design

Although technological development has created several tools and techniques of graphic representation, we highlight here the importance of the manual drawing abilities for the design creative process. Freehand drawing is used to facilitate the development of projects and show them more quickly and efficiently, and is an essential technique for any designer, regardless is informational, product or fashion designer.