Pretreatments
Mostrando 1-12 de 143 artigos, teses e dissertações.
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1. Optimization of Alkaline, Acidic, Ionic Liquid and Oxidative Pretreatments for Coconut Waste Conversion into Fermentable Sugars
Cocos nucifera L. is a palm tree of paramount importance in the food and chemistry industries, although over 50% of its biomass is discarded as waste. The aim of the study is to investigate different pretreatments in to coconut husks (CH), based on acid, alkaline, ionic liquid (IL), and peroxidative, in order to produce fermentable sugars. Severity factors w
J. Braz. Chem. Soc.. Publicado em: 2020-05
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2. DISRUPTION OF Nannochloropsis gaditana (EUSTIGMATOPHYCEAE) RIGID CELL WALL BY NON-THERMAL PLASMA PRIOR TO LIPID EXTRACTION AND ITS EFFECT ON FATTY ACID COMPOSITION
Abstract This study assessed the effect of non-thermal plasma (NTP) on Nannochloropsis gaditana cell rupture and subsequent lipid extraction. Micrograph images showed that the surface of original N. gaditana cells appeared smooth and had no apparent holes, whereas after NTP the cells showed a non-uniform apparently fractured surface with many pores and large
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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3. Pré-tratamento físico-químico e enzimático para efluente de abatedouro
RESUMO O efluente gerado em um abatedouro de aves, contendo gordura (quantificada pela análise de Óleos e Graxas - O&G) na concentração de 1.100 mg.L-1, foi submetido a dois pré-tratamentos para redução da concentração de material orgânico particulado: um tratamento físico-químico convencional (coagulação/floculação com cloreto férrico) ou u
Eng. Sanit. Ambient.. Publicado em: 25/11/2019
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4. Influence of the Pre-Treatments and Process Temperature on the Adhesion of TiN Films Deposited by PBII&D Over Nitrided Austenitic Stainless Steel
In this work the influence of pre-treatment cleaning processes in the adhesion of TiN films deposited by the plasma based ion implantation and deposition (PBII&D) process over plasma nitrided AISI 316L stainless steel was investigated, varying the gas composition, the duration of the sputtering process and the temperature in the same deposition chamber. The
Mat. Res.. Publicado em: 28/10/2019
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5. INFLUENCE OF PRETREATMENTS ON CRYSTALLINITY AND ENZYMATIC HYDROLYSIS IN SUGAR CANE RESIDUES
ABSTRACT This research evaluated the effect of different delignification pretreatments (enzymatic and organosolv), on the crystallinity and enzymatic hydrolysis of harvested sugar cane residues. The Crystallinity Index (CrI), the Relative Number of Intensity (Ir), the degree of cellulose mercerization (IIC-%), and the Global Index of Saccharification (GIS) w
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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6. Influência de tratamento dentinário com EDTA sobre a resistência de união de sistemas adesivos autocondicionantes
Resumo Introdução Os adesivos autocondicionantes apresentam técnica adesiva simplificada e diminuição na sensibilidade pós-operatória. Quando aplicados sobre a dentina, atuam sobre a smear layer, cuja efetiva remoção ainda constitui um desafio. Uma substância utilizada como pré-tratamento dentinário na ajuda da remoção da smear layer é o eti
Rev. odontol. UNESP. Publicado em: 11/03/2019
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7. Effects of pre-treatment of Curauá fibers on compatibility with portland cements
ABSTRACT There has been ever growing interest in the construction industry in using lighter, eco-friendly and sustainable materials, while maintainingthe desirable mechanical properties. The objective of the present work was to evaluate the effects of pre-treatments on chemical compatibility between Curauá fiber (Ananas erectifolius) and Portland cement. In
Matéria (Rio J.). Publicado em: 18/10/2018
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8. Effect of different beta-glucan preparation pretreatments on fortified bread quality
Abstract This research explores the different beta-glucan preparation pretreatments prior to fortifying the bread (hydrating, freezing, boiling, blendering and their combination). Breads containing hydrated or dry beta-glucan preparations demonstrated lower values of specific volume than the control. On the other hand, the beta-glucan preparation, which was
Food Sci. Technol. Publicado em: 21/09/2018
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9. Efecto de la concentración del silano MTMO sobre la protección contra la corrosión de acero electrocincado
ABSTRACT Superficial pretreatments based on silanes are one of the prominent alternatives to replace chromates as temporary protectors from the action of aggressive environments to metallic substrates. The barrier effect afforded by the silane film makes porosity, thickness and film homogeneity important issues in the protective effect. In the present work,
Matéria (Rio J.). Publicado em: 19/07/2018
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10. Prediction of moisture transfer parameters for convective drying of shrimp at different pretreatments
Abstract By the analytical model proposed by Dincer and Dost, the mass transfer parameters (moisture transfer coefficient and moisture diffusivity) of shrimp samples were determined. Three sets of drying experiments were performed with three samples of shrimp: without boiling (WB), boiled in salt solution (SB) and boiled in salt solution and subjected to li
Food Sci. Technol. Publicado em: 19/04/2018
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11. Effect of CaCl2 and controlled atmosphere storage on phytochemical attributes of Guava
Abstract Guava is very delicate and alluring fruit which is being ignored since very long time despite of highly nutritious fruit and rich source of Vitamin C. It contains Vitamin C 2-3 times more than orange. Naturally the guava fruit is enriched with vitamin C and polyphenoles. Guavas fruits after harvesting were dunked in solutions of CaCl2 (1, 2 and 3%)
Food Sci. Technol. Publicado em: 19/10/2017
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12. Corrosion Mechanism Suggested Based on Electrochemical Analysis and SVET for Uncoated Tinplate and Post Coated With a Hybrid Film
The tinplate, used in the packaging sector and formed from a metal substrate, comprises a steel base which has undergone a surface treatment to produce a thin layer of FeSn2, a tin layer and an oxide tin layer. Currently, packaging using surface treatment is based on the use of chromates because these metals provide an excellent corrosion resistance. Nontoxi
Mat. Res.. Publicado em: 09/10/2017