Araraquara, Brazil
Araraquara, Brazil
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Moraes F.A.B.,UNIARA | Piratelli C.L.,UNIARA | Achcar J.A.,UNIARA | Achcar J.A.,University of Sao Paulo
Producao | Year: 2014

This study presents a statistical modeling approach for wood consumption in the cellulose industry. One of the goals of the cellulose industry is to identify the factors that can affect wood consumption (CEM) and cause high variability in production costs. Multiple linear regression models were used for this purpose. After the factors of influence were identified (for optimal conditions), the goal was to determine their appropriate values to minimize CEM in the production process, using response surface methods. The results showed that three factors affect wood consumption: the basic density (DB) of the wood received, the Kraft pulp yield (REND), and wood losses that occur during the production process (PERDAS). The optimal conditions identified are DB > 500kg-dry/m3-solid, REND > 57% and PERDAS < 13%. The statistical approach taken in this work is concluded to be useful in process control in the cellulose industry and can also provide insights useful to forest planning.

Barud H.S.,São Paulo State University | Regiani T.,São Paulo State University | Marques R.F.C.,Federal University of Alfenas | Lustri W.R.,Uniara | And 2 more authors.
Journal of Nanomaterials | Year: 2011

Antimicrobial bacterial cellulose-silver nanoparticles composite membranes have been obtained by in situ preparation of Ag nanoparticles from hydrolytic decomposition of silver nitrate solution using triethanolamine as reducing and complexing agent. The formation of silver nanoparticles was evidenced by the X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and absorption in the UV-Visible (350nm to 600nm). Thermal and mechanical properties together with swelling behavior for water were considered. TEA concentration was observed to be important in order to obtain only Ag particles and not a mixture of silver oxides. It was also observed to control particle size and amount of silver contents in bacterial cellulose. The composite membranes exhibited strong antimicrobial activity against Gram-negative and Gram-positive bacteria. © 2011 Hernane S. Barud et al.

Galbiatti J.A.,UNIARA | Ariguchi B.B.,UNIFAFIBE | de Sousa C.M.,UNIFAFIBE | Caramelo A.D.,UNIFAFIBE | de Faria R.T.,São Paulo State University
Journal of Food, Agriculture and Environment | Year: 2015

Basil plants are cultivated in most Brazil in home gardens for spice, medicinal and ornamental uses. The present study aimed to evaluate different sources and combinations of substrates in the production of basil seedlings, through the development and production of essential oil grown in two water regimes. The experiment was conducted at the Experimental Station of Bebedouro-SP. Ten substrates were tested, resulting from the combination of commercial substrate, bovine manure, organic waste compost and organic tree pruning compost. The experimental design was randomized blocks with 20 treatments in a factorial 10 x 2 (10 substrates and 2 irrigation levels) experiment with 3 replicates. The amount of fresh matter and oil content produced in the basil leaves was evaluated. The fresh matter of the substrate 4 (60% of soil and 40% of manure) was satisfactory with 80% of evaporation. As for the substrate oil content, the substrates 4 (60% of soil and 40% of manure), 3 (60% of soil and 40% of waste compost) and 5 (60% of soil and 40% of pruning compound) were the highest oil producers, at 80% of the evapotranspiration. © 2015, World Food Ltd. and WFL Publishers. All rights reserved.

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