Results 191 to 200 of about 323,700 (316)

Segurança química, saúde e ambiente: perspectivas para a governança no contexto brasileiro

Cadernos de Saúde Pública
A segurança química é reconhecida na Agenda 21 como um dos sérios problemas à saúde e ao ambiente que devem ser enfrentados globalmente, convertendo-se em um problema de governança, nos níveis nacional e internacional.
Carlos Machado de Freitas, Marcelo Firpo S. Porto, Josino Costa Moreira, Fatima Pivetta, Jorge M. Huet Machado, Nilton B. B. de Freitas, Arline S. Arcuri   +6 more
doaj  

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Food chemical safety /

Chemical contaminants in food, from pesticides and veterinary drug residues to contamination from food packaging, are a major concern for the food industry.
Watson, D. H.(David H.),
core  

Editorial: Bioenergetic and behavioral effects of rapid anthropogenic change and eco-evolutionary implications

Frontiers in Bird Science
Melissa L. Grunst, Andrea S. Grunst, Jérôme Fort, Jacquelyn K. Grace   +3 more
doaj   +1 more source

Monitoramento da contaminação por elementos traço em ostras comercializadas em Recife, Pernambuco, Brasil

Cadernos de Saúde Pública
Amostras de ostras comercializadas em Recife, Pernambuco, Brasil, foram monitoradas em relação ao conteúdo de elementos traço (Hg, Zn, Fe, Cu e Mn) durante o período de um ano (março/2001 a fevereiro/2002).
André Dias Cavalcanti
doaj  

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

Advanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho, M. Naeem, T. H. C. Costa, M. S. Libório, J. C. A. Queiroz, C. B. B. Luna, R. R. M. Sousa, P. S. Vieira, E. M. Araújo   +8 more
wiley   +1 more source

Global Catastrophic Risks by Chemical Contamination

: Global chemical contamination is an underexplored source of global catastrophic risks that is estimated to have low a priori probability. However, events such as pollinating insects’ population decline and lowering of the human male sperm count hint at
Turchin, Alexey
core  

An Experimental High‐Throughput Approach for the Screening of Hard Magnet Materials

Advanced Engineering Materials, EarlyView.
An entire workflow for the high‐throughput characterization and analysis of compositionally graded magnetic films is presented. Characterization protocols, data management tools and data analysis approaches are illustrated with test case Sm(Fe, V)12 based films.
William Rigaut, Pierre Le Berre, Hamdi Jaballah, Lukas Fink, Victor Poline, Richard Haettel, Stéphane Grenier, Gilbert Chahine, Ewen Bellec, Guillaume Buatier, Wilfried Hortschitz, Santa Pile, Thomas Schrefl, Nils Blanc, Yuan Hong, Thibaut Devillers, Nora M. Dempsey   +16 more
wiley   +1 more source

Linking Degradation Pathways, Additive Transformation, and Contaminant Profiles in Post-Consumer HDPE: Implications for Recycling Quality. [PDF]

Polymers (Basel)
Kucbel M, Raclavská H, Růžičková J, Šafář M, Švédová B, Slamová K, Kantor P, Braun P.   +7 more
europepmc   +1 more source

Natural Bone‐Derived Ceramic Scaffolds Functionalized with Chitosan‐Gold, Chitosan‐Magnesium, and Chitosan‐Zinc for Enhanced Antibacterial Activity

Advanced Engineering Materials, EarlyView.
This study reports the development of antibacterial ceramic scaffolds derived from natural bovine bone. The bones were processed through sequential boiling and hydrogen peroxide treatment to remove organic matter, producing porous, mineral‐rich scaffolds.
Mohamad Hassan Taherian, Anh Thi Le, Anh Thi Van Le, Dung My Thi Dang, Tin Chanh Duc Doan, Chien Mau Dang, Martin Bolduc   +6 more
wiley   +1 more source