8 documents found, page 1 of 1
Tunning antisolvent precipitation for the synthesis of lignin nanoparticles usi...
Mesquita, Ricardo Marchezan Farias de; Schneider, Willian Daniel Hahn; Longo, Vinicius; Baudel, Henrique Macedo; Diebold, Eduardo; Rencoret, JorgeLignin nanoparticles (LNPs) show great potential in UV-protectants, drugs carriers, encapsulation, supercapacitors, and others. This study proposes the development of an optimised LNP synthesis method by antisolvent precipitation, using lignin from persimmon tree pruning waste, green coconut waste, and sugarcane bagasse. The best synthesis conditions were determined evaluating the chemical composition and the p...
Inter rater disagreements in applying the montreal classification for Crohn's d...
Ukashi, Offir; Amiot, Aurelien; Laharie, David; Menchén, Luis; Gutiérrez, Ana; Fernandes, Samuel; Pessarelli, Tommaso; Correia, FábioBackground: The Montreal classification has been widely used in Crohn's disease since 2005 to categorize patients by the age of onset (A), disease location (L), behavior (B), and upper gastrointestinal tract and perianal involvement. With evolving management paradigms in Crohn's disease, we aimed to assess the performance of gastroenterologists in applying the Montreal classification. Methods: An online survey ...
EFEITO DO MÉTODO DE CUIDADO MÃE CANGURU: REVISÃO BIBLIOGRÁFICA
Carranza, Javier; Gutiérrez, Ana; Bainouni, José; Manjate, Cristina; Zangão, OtíliaO Método de Cuidado Mãe Canguru é definido como o contato precoce pele a pele, entre a mãe e o filho prematuro ou de baixo peso ao nascer, na forma mais contínua e prolongada possível com a amamentação, para que ambos se beneficiem das vantagens. Pode ser considerada uma alternativa mais económica e humana à incubadora. Atualmente, são numerosos os estudos que dão atenção especial à termorregulação, à amamentaç...
Transforming second-generation ethanol production waste into sustainable enzyma...
Polesso, Camila Borges; Fontana, Roselei Claudete; Costa, Cristiana C.; Fernandes, Bruno; Matamá, Maria Teresa Gonçalves Macedo; Cavaco-Paulo, ArturAgro-industrial residues were used as a successful, cheap and renewable substrate, capable of increasing activity of ligninolytic enzymes for further use in melanin degradation assays to develop inputs for the treatment of skin hyperpigmentation. The analysis of melanin degradation was performed in a quantitative and qualitative way. The enzymatic crude broth extract, rich in laccases, produced by Marasmiellus ...
Lignin from tree barks: chemical structure and valorization
Neiva, Duarte M.; Rencoret, Jorge; Marques, Gisela; Gutiérrez, Ana; Gominho, Jorge; Pereira, Helena; Rio, José C. delLignins from different tree barks, including Norway spruce (Picea abies), eucalyptus (Eucalyptus globulus), mimosa (Acacia dealbata) and blackwood acacia (A. melanoxylon), are thoroughly characterized. The lignin from E. globulus bark is found to be enriched in syringyl (S) units, with lower amounts of guaiacyl (G) and p-hydroxyphenyl (H) units (H/G/S ratio of 1:26:73), which produces a lignin that is highly en...
Hydroxystilbene glucosides are incorporated into Norway spruce bark lignin
Rencoret, Jorge; Neiva, Duarte M.; Marques, Gisela; Gutiérrez, Ana; Kim, Hoon; Gominho, Jorge; Pereira, H.; Ralph, John; Rio, José C. delRecent investigations have revealed that, in addition to monolignols, some phenolic compounds derived from the flavonoid and hydroxystilbene biosynthetic pathways can also function as true lignin monomers in some plants. In this study, we found that the hydroxystilbene glucosides isorhapontin (isorhapontigenin-O-glucoside) and, at lower levels, astringin (piceatannol- O-glucoside) and piceid (resveratrol-O-gluc...
Morphological characteristics and composition of lipophilic extractives and lig...
Prinsen, Pepijn; Gutiérrez, Ana; Rencoret, Jorge; Nieto, Lidia; Jiménez-Barbero, Jesús; Burnet, Auphélia; Petit-Conil, Michel; Colodette, Jorge L.The morphological and chemical characteristics of the woods from several eucalypt hybrids from the Brazilian Genolyptus program were studied. The hybrids selected for this study were Eucalyptus grandis × E. urophylla (IP), E. urophylla × E. urophylla (U1 × U2), E. grandis × [E. urophylla × E. globulus] (G1 × UGL), and [E. dunnii × E. grandis] × E. urophylla (DG × U2). The analyses of the lipophilic extractives ...
Ferulates and lignin structural composition in cork
V Marques, A; RENCORET, JORGE; Gutiérrez, Ana; Río, José C. del; Pereira, HelenaThe structure of lignin and suberin, and ferulic acid (FA) content in cork from Quercus suber L. were studied. Extractive-free cork (Cork), suberin, desuberized cork (Cork(sap)), and milled-cork lignins (MCL) from Cork and Cork(sap) were isolated. Suberin composition was determined by GC-MS/FID, whereas the polymers structure in Cork, Corksap, and MCL was studied by Py-TMAH and 2D-HSQC-NMR. Suberin contained 94...