16 documents found, page 1 of 2
Nanofibrillated cationic cellulose derivatives as flocculants for domestic wast...
Ribau Teixeira, Margarida; Ismail, Abdullah; Medronho, Bruno; Alves, Luís; Pedrosa, Jorge F.S.; Ferreira, Paulo J.T.; Serrão Sousa, VâniaNatural-based coagulants have emerged as a reliable option to implement more sustainable operations and management of wastewater treatment plants. This work aims at evaluating the use of cationic nanofibrillated celluloses (cNFC) as novel bio-based flocculants to treat domestic wastewaters by the most widely employed treatment process – coagulation/flocculation. Two cNFC samples were prepared with different cha...
Epigenomics as a novel approach to explore the toxic effects of nanomaterials
Ventura, Célia; Vieira, Luís; Valente, Ana; Fernandes, Camila; Silva, Catarina; Louro, Henriqueta; Ferreira, Paulo J.T.; Silva, Maria JoãoIn recent years, there has been a huge development of innovative engineered nanomaterials with potential use in industrial and biomedical applications. This increased widespread use raised concerns that nanomaterials may elicit human adverse health effects through occupational, environmental or consumer exposure. Many toxicity studies, mainly in vitro, have showed that some nanomaterials, such as carbon nanotub...
Genotoxicity of Three Micro/Nanocelluloses with Different Physicochemical Chara...
Ventura, Célia; Marques, Catarina; Cadete, João; Vilar, Madalena; Pedrosa, Jorge F.S.; Pinto, Fátima; Fernandes, Susete Nogueira; da Rosa, Rafaela RauppBackground: Nanocellulose is an innovative engineered nanomaterial with an enormous potential for use in a wide array of industrial and biomedical applications and with fast growing economic value. The expanding production of nanocellulose is leading to an increased human exposure, raising concerns about their potential health effects. This study was aimed at assessing the potential toxic and genotoxic effects ...
Analysis of the In Vitro Toxicity of Nanocelluloses in Human Lung Cells as Comp...
Pinto, Fátima; Lourenço, Ana Filipa; Pedrosa, Jorge F.S.; Gonçalves, Lídia; Ventura, Célia; Vital, Nádia; Bettencourt, Ana; Fernandes, Susete N.Cellulose micro/nanomaterials (CMNM), comprising cellulose microfibrils (CMF), nanofibrils (CNF), and nanocrystals (CNC), are being recognized as promising bio-nanomaterials due to their natural and renewable source, attractive properties, and potential for applications with industrial and economical value. Thus, it is crucial to investigate their potential toxicity before starting their production at a larger ...
Investigation of potential respiratory adverse effects of micro/nanofibrillated...
Pinto, Fátima; Ventura, Célia; Cadete, João; Lourenço, Ana Filipa; Pedrosa, Jorge F.S.; Vital, Nádia; Pereira, Joana F.S.; Matos, PauloMicro/nanofibrillated (CMF/CNF) and nanocrystalline (CNC) celluloses are innovative materials with enormous potential for industrial and biomedical applications. Their expanding production/application urges the investigation of their safety for human health. This study aimed at investigating the potential respiratory outcomes of two CMF/CNF and one CNC produced from bleached Eucalyptus globulus kraft pulp using...
Toxicidade da nanocelulose em modelos in vitro: um contributo para a avaliação ...
Ventura, Célia; Pinto, Fátima; Marques, Catarina; Cadete, João; Vilar, Madalena; Lourenço, Ana Filipa; Pedrosa, Jorge F. S.; Fernandes, Susete N.As nanoceluloses são nanomateriais inovadores com potencial para uma vasta gama de aplicações industriais e biomédicas. No entanto, a expansão da sua produção tem vindo a suscitar preocupações quanto aos possíveis efeitos, a longo prazo, na saúde humana. Este estudo teve como objetivo avaliar a segurança de algumas nanoceluloses produzidas a partir de matéria-prima nacional, através da caracterização da sua pot...
Evaluation of cytotoxic and genotoxic effects of functionalized nanocellulose i...
Pinto, Fátima; Ventura, Célia; Lourenço, Ana Filipa; Ferreira, Paulo J.T.; Louro, Henriqueta; Silva, Maria JoãoIntroduction: Nanocelluloses, obtained from different sources and by various methods and holding different functionalization are innovative environmentally friendly materials in both pure and composite forms that hold great promise for industrial or advanced biomedical applications. Based on previous knowledge on other nanofibers e.g., carbon nanotubes, revealing toxicity at cellular and organismal levels, ther...
Exploring potential genotoxic effects of nanocelluloses versus multi-walled car...
Pinto, Fátima; Ventura, Célia; Teixeira, Sara; Lourenço, Ana Filipa; Fernandes, S.N.; da Rosa, R.R.; Godinho, M.H.; Ferreira, Paulo J.T.Cellulose nanomaterials (CNMs) are advanced materials exhibiting unique properties for innumerous industrial and biomedical applications. Human exposure to CNMs has been equally growing, which raises some concern, given the similarity of some CNMs size and morphology with that of multiwalled carbon nanotubes (MWCNTs) that induce lung toxicity. The genotoxic effects of three CNMs produced from Eucalyptus globulu...
Cytotoxicity Assessment of Novel Cellulose Nanomaterials on Intestinal Cells
Vital, Nádia; Pinto, Fátima; Rolo, Dora; Pedrosa, Jorge; Ferreira, Paulo J.T.; Kranendonk, Michel; Silva, Maria João; Louro, HenriquetaCellulose nanomaterials (CNMs) emerged as an important group of nanomaterials with potential applications in multiple food-related products, as zero-calorie filler/thickener/stabilizer, or as a substitute for petroleum-based food packaging materials. Human oral exposure to CNMs is increasing, but little is known about the potential adverse biological impact of CNMs on human gastrointestinal tract. To contribute...
On the toxicity of cellulose nanocrystals and nanofibrils in animal and cellula...
Ventura, Célia; Pinto, Fátima; Lourenço, Ana Filipa; Ferreira, Paulo J.T.; Louro, Henriqueta; Silva, Maria JoãoThe need for reaching environmental sustainability encourages research on new cellulosebased materials for a broad range of applications across many sectors of industry. Cellulosic nanomaterials obtained from different sources and with different functionalization are being developed with the purpose of its use in many applications, in pure and composite forms, from consumer products to pharmaceutics and healthc...