14 documents found, page 1 of 2
Lipid microspheres containing urea for slow release of non-protein N in ruminan...
Netto, Antonio Joelson; De Azevedo Silva, Aderbal Marcos; Bezerra, Leilson Rocha; De Barros Carvalho, Ariádne; Da Silva Agostini, Deuber LinconMade available in DSpace on 2022-04-29T08:46:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-01-01; Context: Urea is widely used in ruminant diets as a source of non-protein nitrogen (NPN), partially substituting for true protein in feed, but high levels of urea in the diet may cause toxicity. Aims: This study investigated the microencapsulation of urea in carnauba wax for slow release in the rumen to...
Estudo das propriedades mecânicas e térmicas das fibras de bambu antes e após t...
Costa Júnior, Antônio Eufrazio da; Nascimento, Diego Magalhães do; Oliveira Junior, Silvestre Carvalho de; Deus, Ênio Pontes de; Mazzetto, Selma ElaineThe interest in environmentally correct technologies has become a major concern, motivated, among many things, by the growth of social and environmental awareness. In this context, vegetable fibers emerge as major candidates, as ecological and economical alternatives to replace synthetic fibers derived from non-renewable sources.The bamboo fibers are perfectly adequate for this trend: they are long, have high s...
Produção de nanocelulose obtida de fibras de bambu micronizadas
Maciel Júnior, Renardir Peixoto; Alencar, Roberto Abreu; Arrais, Dário Freire; Melo, Santino Loruan Silvestre de; Costa Júnior, Antônio Eufrazio daThe extraction of plant fibers nanocelulose is an example of the growing search for more sustainable materials with good performance and quality. In this work, was extracted nanocelulose bamboo fibers that are rich in cellulose, hemicellulose and lignin. After some tests, detected high abundance of cellulose, and the accompanying guidance in the areas of bamboo internodes. Therefore, the aim objective is to ext...
Caracterização de tubos rígidos de policloreto de vinila reciclado
Pennafort Junior, Luiz Carlos Gonçalves; Costa Júnior, Antônio Eufrazio da; Sousa, F. L. M.; Nogueira, Bruno Mendes; Mazzetto, Selma ElaineThis paper describes the characterization of rigid pipes of polyvinyl chloride (PVC), manufactured with recycled resin derived from industrial waste reprocessing and/or sanitary. The recycled pipe was characterized using the techniques of X-ray Diffraction (XRD), thermogravimetry (TG / DTG), vibrational spectroscopy absorption Fourier transform infrared (FTIR) and tensile testing. The diffraction pattern reveal...
Photoelectrodes with titanate nanotubes sensitized by mesoporphyrin derivative ...
Souza, Antonio Paulo Santos; Almeida, Ana Fabíola Leite; Conegero, Leila de Souza; Viana, Bartolomeu Cruz; Ferreira, Odair PastorTitanate nanotubes (TiNTs) with the chemical composition Na2Ti3O7.nH2O (NaTiNT) were obtained through a hydrothermal method in highly alkaline medium. Protonated titanates nanotubes (H-TiNTs), with the composition H2Ti3O7.nH2O, were prepared by ion exchange reaction through a suspension of Na2Ti3O7nH2O nanotubes in HCl medium, promoting the exchange of Na+ ions by H+. Both Na2Ti3O7.nH2O and H2Ti3O7.nH2O produc...
Blendas de bagaço de cana-de-açúcar, podas de mangueira e cajueiro: caracteriza...
Ponte, Marcelo Rodrigues; Gadelha, Antônia Mabrysa Torres; Machado, Yguatyara de Luna; Lopes, Ada Amélia Sanders; Malveira, Jackson de QueirozThe work shows the energy potential of blends of sugarcane bagasse with the mango tree and cashew tree's pruning. The samples were characterized by gross calorific value, density, proximate analysis (moisture, ash, volatile matter and fixed carbon), elemental analysis and thermogravimetry. The blends were prepared with different mass fractions. After evaluation of the samples qualitative and quantitative analys...
Lemongrass (Cymbopogon citratus DC. Stapf) essential oil microparticles: Develo...
Martins, Wanderson da Silva; Fernandes de Araujo, Jayuri Susy; Feitosa, Bruno Fonseca; Oliveira, Jessica Ribeiro; Viana Kotzebue, Lloyd RyanMade available in DSpace on 2021-06-25T15:03:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-09-01; Maltodextrin (DE 20) and gelatin (4:1, w/w, respectively) were investigated as encapsulant materials for lemongrass (Cymbopogon citratus DC. Stapf) essential oil microencapsulation by freeze-drying. Three formulations were prepared: M1 (5% essential oil), M2 (10% essential oil), and M3 (15% essential oi...
Teatro científico: uma ferramenta interdisciplinar que encanta e estimula o ens...
Lima, Nayane Maria de Amorim; Almeida, Mayara Oliveira de; Bezerra, Thayllan Teixeira; Mazzetto, Selma ElainePesquisas na área do Ensino de Química vêm se expandindo além dos muros das escolas dando início ao ensino informal, onde a preocupação é divulgar a Ciência, encantar e atrair os jovens para o conhecimento científico. Dentre as metodologias empregadas encontra-se o teatro científico, unindo aspectos lúdicos das artes cênicas com conceitos científicos. Nesta perspectiva, o presente trabalho teve como objetivo cr...
Microencapsulation of sweet orange essential oil (Citrus aurantium var. dulcis)...
Fernandes de Araujo, Jayuri Susy; Souza, Evandro Leite de; Oliveira, Jessica Ribeiro; Alves Gomes, Ana Cristina; Viana Kotzebue, Lloyd RyanMade available in DSpace on 2020-12-10T19:50:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-15; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); This study evaluated maltodextrin (MD) and gelatin (GEL) in different ratios (SO1, MD only; SO2, MD and GEL = 2:1; and SO3, MD and GEL =1:1, respectively) as wall materials to microencapsulation of sweet orange essential oil (SOEO, 10%...
Estudo da síntese e caracterização de uma nova benzoxazina a partir do guaiacol
Oliveira, Jéssica Ribeiro de; Kotzebue, Lloyd Ryan Viana; Ribeiro, Francisco Wanderson Moreira; Mazzetto, Selma ElaineO presente trabalho apresenta o estudo da síntese e caracterização estrutural de uma nova benzoxazina obtida a partir do guaiacol, composto cuja estrutura aromática é reconhecida como uma unidade representativa da molécula da lignina, enquadrando-se como fonte renovável e, desta forma, em concordância com os princípios da Química Verde. As benzoxazinas são compostos heterocíclicos que apresentam em sua estrutur...