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Literature Review on Furfural Production from Lignocellulosic Biomass

Natural Resources 2016年第3期7卷 115-129页

作者： grazielle machado Sabrina Leon Fernando Santos Rogério Lourega Jeane Dullius Maria Elizabete Mollmann Paulo Eichler Study Center in Biorefinery State University of Rio Grande do Sul Porto Alegre Brazil Institute of Petroleum and Natural Resources Pontifical Catholic University of Rio Grande do Sul Porto Alegre Brazil

The use of renewable sources for obtainment of chemicals, biofuels, materials and energy has become each time larger due to environmental, political and economical problems of non-renewable energies utilization. Among several products that can be obtained from lignocellulosic biomass, which is a renewable source, there is furfural, a chemical from which many other value added chemical products can be obtained. The main route for furfural production consists of an acid hydrolysis of hemicelluloses present in lignocellulosic biomass to obtain xylose, which goes through a dehydration reaction to produce furfural. Due to the presence of an aldehyde group and a conjugated system of double bounds, furfural can go through several reactions, allowing the production of a range of value added products. In this sense, this article performs a review about mechanisms of furfural production from lignocellulosic biomass, highlighting its chemical properties which enable its utilization in different industrial applications of economic interest.

关键词： Furfural Xylose Lignocellulosic Biomass Biorefinery

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Characterization and Potential Evaluation of Residues from the Sugarcane Industry of Rio Grande do Sul in Biorefinery Processes

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Natural Resources 2018年第5期9卷 175-187页

作者： grazielle machado Fernando Santos Douglas Faria Taiane Nunes de Queiroz Flá via Zinani José Humberto de Queiroz Fernando Gomes Instituto do Petró leo e dos Recursos Naturais Pontif&iacute cia Universidade Cató lica do Rio Grande do Sul Porto Alegre Brazil Centro de Estudos em Biorrefinaria Universidade Estadual do Rio Grande do Sul Porto Alegre Brazil Escola Polité cnica Universidade do Vale do Rio dos Sinos S&amp amp o Leopoldo Brazil Departamento de Bioquí mica e Biologia Molecular Universidade Federal de Vi&amp amp osa Vi&amp amp osa Brazil Instituto de Florestas Universidade Federal Rural do Rio de Janeiro Serop&eacute dica Brazil

Brazil is the world largest producer of sugarcane (Saccharum officinarum) leading to a great generation of residues such as bagasse and straw, which represent two thirds of sugarcane energetic potential. Regarding these residues energetic potential, it is interesting to study their application in biorefinery processes. Thus, this work aimed at performing a chemical characterization of sugarcane straw and bagasse from RB867515 cultivar grown in Rio Grande do Sul-Brazil aiming at their use as feedstock in biorefinery processes. The obtained results were compared to data from other states and it was possible to conclude that edaphoclimatic conditions of Rio Grande do Sul have little influence in sugarcane residues chemical composition. Sugarcane bagasse presents larger potential for energetic use because of its volatiles content (74.82%) slightly higher than straw (68.90%), besides its high lignin content (21.85%) and higher calorific value (18.70 MJ/kg). Both sugarcane residues produced in Rio Grande do Sul have potential use as substrate in the obtainment of high value-added products from their cellulosic fractions (41.30% and 37.25%, respectively). The evaluation of energetic and chemical potential of sugarcane bagasse and straw produced in Rio Grande do Sul leads to the conclusion that these materials have high potential for use as feedstock in biorefineries.

关键词： Saccharum officinarum Straw Bagasse Biomass

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Lachesis Muta Muta: State of the Art

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Journal of Life Sciences 2021年第1期15卷 1-10页

作者： grazielle Delaroli Pilon Yoko Oshima-Franco Biomedicine Course University of Sorocaba(UNISO)Rodovia Raposo Tavares km 92.5SorocabaSP 18023-000Brazil Post-Graduate Program in Pharmaceutical Sciences University of Sorocaba(UNISO)Rodovia Raposo Tavares km 92.5SorocabaSP 18023-000Brazil

This article was carried out to gather a collection of data extracted from several studies about the snake Lachesis muta muta(surucucu),encompassing in this information from the effects and properties of its venom,case report,treatment and even *** was addressed throughout the study by referring mainly to their venom,which in isolated fractions,as LHFI,LHFII,LmTX-I,among others,present several activities,among which stand out are:coagulant,hemorrhagic,proteolytic and ***,other studies involving its diagnosis,treatment,cytotoxicity,edema,inflammation,genotoxicity and mutagenicity have also been carried *** bibliographic survey initially made,followed by the selection of collected data,was properly organized in the text using the narrative method,so that the findings could be chronologically distributed in a ***,it was possible to conclude that all these studies were and are of paramount importance to help understand the pathophysiology of envenoming by this snake,in addition to pointing out the Bothrops-Lachesis antivenom,opening a wide therapeutic window for numerous applications.

关键词： Lachesis muta muta snake venom state of the art

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HVDC Grid Segmentation Analysis for Blackouts Reduction

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Journal of Power and Energy Engineering 2017年第3期5卷 36-48页

作者： grazielle Jacinta Cardoso Santos Patrícia Romeiro da Silva Jota Electrical Engineer Department Federal Centre of Technological Education (CEFET-MG) Belo Horizonte Brazil

Segmentation of large AC systems through DC links introduces a new concept that utilizes the advantages of direct current transmission to improve network reliability and increase power transfer capacity. Technical literature argues that the segmentation of the AC network and the introduction of DC links at these systems connection points bring benefits to system operation, once contingencies generated on one side of the DC connection point would not be reflected on the other side of DC connection, thereby reducing the likelihood of cascading shutdowns and blackouts due to load restraint on transmission lines and transformers. Amidst this scenario, this paper presents a study of the main topics regarding the use of this new network segmentation philosophy, bringing a practical point of view for the use of this concept at the electrical power system planning. The effect of DC segmentation before a contingency that would initiate major outages in an adapted electrical system model IEEE-14 bus is studied and simulations have been performed with test HVAC systems and segmented by HVDC link. The results have been compared, principally in relation to the voltage bus, reactive power generation, system losses and power flow at the lines, and demonstrated that this new concept improved the grid reliability.

关键词： DC-Segmentation Grid Segmentation DC Link Blackouts Cascading Outages

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