Klason Lignin
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. An alternative energy generation from charcoal produced from Brazilian pine (Araucaria angustifolia (Bert.) O. Ktze) seed residues
The perspective is that the energy demand will grow in the coming decades worldwide. The search for renewable energy sources is urgent and necessary. Residual biomass may be a promising source of raw material for obtaining bioenergy. Thus, this research sought to evaluate the energetic and physicochemical properties of residues from the seeds of Brazilian pi
Química Nova. Publicado em: 2022
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2. Different Types of Lignocellulosic Materials for Energy Generation in the Ceramic Industry
ABSTRACT This work aims at the physicochemical characterization of four species: Eucalyptus sp, Pinus sp, Citrus sinensis and Hevea brasiliensis for use in ceramic furnace. Immediate analysis, chemical analyses were carried out (total extractives, Klason lignin, holocellulose and alpha-cellulose content). Results were applied to ANOVA and Tukey for statistic
Floresta Ambient.. Publicado em: 03/10/2019
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3. Involvement of peroxidases in structural changes of barley stem
ABSTRACT The aim of this study was to investigate anatomical characteristics of barley (Hordeum vulgare L.) internodes and to reveal the connection with activity of guaiacol-peroxidases, their isoenzyme profiles, lignin, and cellulose content. Three lower internodes were sampled at elongation stage and differed in their anatomical features by showing that li
Bragantia. Publicado em: 29/05/2017
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4. Downregulation of caffeoyl-CoA O-methyltransferase (CCoAOMT) by RNA interference leads to reduced lignin production in maize straw
Lignin is a major cell wall component of vascular plants that provides mechanical strength and hydrophobicity to vascular vessels. However, the presence of lignin limits the effective use of crop straw in many agroindustrial processes. Here, we generated transgenic maize plants in which the expression of a lignin biosynthetic gene encoding CCoAOMT , a key en
Genet. Mol. Biol.. Publicado em: 25/10/2013
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5. Materials produced from plant biomass: part III: degradation kinetics and hydrogen bonding in lignin
In this study Klason lignins from Eucalyptus grandis (LEUG) and Pinus taeda (LPIT) were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TGA). The degradation kinetic parameters were determined by TGA using the Kissinger method. Thermogravimetric results showed that LPIT had higher thermal stability and also higher act
Mat. Res.. Publicado em: 16/07/2013
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6. Estudo químico, análise do óleo essencial e avaliação das atividades antioxidante e antibacteriana do Marmelhinho [Cordiera sessilis (Vell.) Kuntze (Rubiaceae)]
In this work was carried out chemical analysis, identification of volatile components, the determination of antioxidant activity and antibacterial activity of wood, bark and leaves of Cordiera sessilis (Vell) Kuntze, known as marmelinho. This study is justified because the analysis of chemical species Cordiera sessilis (Vell) Kuntze had not been studied so f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/07/2012
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7. Validação do nanolipe como indicador para estimativa do consumo em bovinos leiteiros
Five crossbred heifers were used in order to validate the NANOLIPE as a marker to estimate dry matter intake in dairy cattle. The results obtained with this marker were compared with three other methods: total collection, fecal crude protein and Klason Lignin (in combination with NANOLIPE). There was no difference between the methods tested (P>5%), a fact th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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8. Systematic study of the reactions involved in the determination of lignin and holocellulose in bagasse and straw from sugar cane samples / Estudo sistemático das reações envolvidas na determinação dos teores de lignina e holocelulose em amostras de bagaço e palha de cana-de-açúcar
The analytical methods currently used for chemical characterization of lignocellulosic materials were developed for wood and are applied with minor modifications for sugar cane bagasse and straw analysis. The lack of specific methodology for these materials leads to inadequate results and hamper both the planning and the interpretation of results. Thus, the
Publicado em: 2009
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9. Evaluation of the chemical composition of the cell wall of transgenic tobacco plants (Nicotiana tabacum) that superexpress the gene ugdh, that codes for the enzyme UDPglucose dehydrogenase (EC 1.1.1.22) / Avaliação da composição química da parede celular de plantas de tabaco (Nicotiana tabacum) que superexpressam o gene ugdh de soja, que codifica a enzima UDP-glicose desidrogenase (EC 1.1.1.22)
The cellular elements that constitute the xylematic tissue of various plant species are widely used in diverse industrial sectors, with numerous applications, for example, the generation of energy and production of cellulose and paper. Plant cell walls are basically formed by cellulose, hemicellulose and lignin. The formation of cellulose and hemicellulose p
Publicado em: 2007
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10. Determinação do teor de lignina em amostras de gramíneas ao longo do crescimento através de três métodos analíticos e implicações com as equações de ″Cornell Net Carboydrate and Protein System″ / Grasses lignin content determination along their growth period through three analytical methods and implications with the Cornell Net Carbohydrate and Protein System equations
Quantificou-se o teor de lignina em cinco amostras de plantas forrageiras, nas frações caule e folha, em quatro estádios de maturidade, através de três métodos analíticos: lignina detergente ácido (LDA), lignina permanganato de potássio (LPer) e lignina Klason (LK), todos de natureza gravimétrica. Os três métodos não foram concordantes entre si,
Publicado em: 2006
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11. Atenuação do processo de lignificação em Eucalyptus grandis (Hill ex Maiden) por GA3 e BAP. / Atenuation of ligninification process in Eucalyptus grandis (Hill ex Maiden) by GA3 and BAP.
This research was caried out to understand the behavior of growth regulators (giberelic acid (GA3) e 6-benzilaminopurin (BAP) on lignification system of Eucalyptus grandis (FORMER Hill Maiden). After GA3 (alone) and BAP (combined) applications, analyses were carried out. These regulators were applied by a atomization system at different concentrations levels
Publicado em: 2005
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12. Modulation of the lignification process for application of jasmonic acid and 2,4-dichlorophenoxyacetic acid in Eucalyptus urophylla S. T. Blake. / Modulação do processo de lignificação por aplicação de ácido jasmônico e ácido 2,4-diclorofenoxiacético em Eucalyptus urophylla S. T. Blake
Lignin is a important a biomacromolecule for several biologic process in plants, the most important process is to give necessary rigidity to keep the stem verticality, and water and minerals circulation. This research was carried out with Eucalyptus urophylla seedling and the result can help other biothecnological studies. In this research were applied diffe
Publicado em: 2005