Download or read book Effets de temp rature sur les nanoparticules de CoAg written by Zeinab Kataya and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette étude a pour objectif de comprendre comment les effets de température, de cinétiques de croissance, ou les effets d'environnement peuvent influencer la structure (cristalline ou non cristalline) et la configuration chimique (mélange/ ségrégation/ séparation de phase) de nanoparticules supportées d'Ag et de CoAg. Pour cela, des nanoparticules de CoAg de différentes tailles et compositions ont été préparées par condensation sous ultravide selon différents modes de croissance (co-dépôt ou dépôts séquentiels des deux métaux). Afin d'accéder à l'ensemble des caractéristiques des nanoparticules, des techniques complémentaires ont été couplées: la diffusion de rayons X aux petits et aux grands angles en incidence rasante et les techniques de microscopie en mode d'imagerie haute résolution ou filtrée en énergie. L'analyse préliminaire de particules d'Ag a montré l'existence de structures cristallines et non cristallines (icosaédriques) pour les petites (2-2.5nm) et grandes tailles (6-8nm). Une dominance de la structure décaédrique a été montrée entre ces deux extrêmes. Cette dernière disparaît complètement lors de l'élaboration en température. Pour le système bimétallique Co-Ag, à température ambiante et indépendamment de la taille, de la composition et du mode d'élaboration, les nanoparticules présentent une ségrégation avec une configuration de type coeur d'argent entouré d'une coquille plus ou moins continue à base de Co métallique et d'oxyde de Co. Lorsque les échantillons sont soumis à un traitement thermique, une transition s'opère conduisant à une ségrégation plus importante de type Janus.

Download or read book Mesocrystals and Nonclassical Crystallization written by Helmut Cöelfen and published by John Wiley & Sons. This book was released on 2008-07-21 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book gives an introduction to self-assembly, classical crystallization, colloidal crystals, and mesocrystals. - This book will be of value to scientists involved with crystallization, materials science, self-assembly, colloid science, nanosciences, biomineralization, and graduate students of material science."--Jacket.

Download or read book Preventing Disease Through Healthy Environments written by Annette Prüss-Üstün and published by World Health Organization. This book was released on 2016 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The main message emerging from this new comprehensive global assessment is that premature death and disease can be prevented through healthier environments--and to a significant degree. Analysing the latest data on the environment-disease nexus and the devastating impact of environmental hazards and risks on global health, backed up by expert opinion, this report covers more than 130 diseases and injuries. The analysis shows that 23% of global deaths (and 26% of deaths among children under five) are due to modifiable environmental factors--and therefore can be prevented. Stroke, ischaemic heart disease, diarrhoea and cancers head the list. People in low-income countries bear the greatest disease burden, with the exception of noncommunicable diseases. The report's unequivocal evidence should add impetus to coordinating global efforts to promote healthy environments--often through well-established, cost-effective interventions. This analysis will inform those who want to better understand the transformational spirit of the Sustainable Development Goals agreed by Heads of State in September 2015. The results of the analysis underscore the pressing importance of stronger intersectoral action to create healthier environments that will contribute to sustainably improving the lives of millions around the world."--Page 4 of cover.

Download or read book Functional Reverse Engineering of Machine Tools written by Wasim Ahmed Khan and published by CRC Press. This book was released on 2019-09-23 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to develop capacity building in strategic and non-strategic machine tool technology. The book contains chapters on how to functionally reverse engineer strategic and non-strategic computer numerical control machinery. Numerous engineering areas, such as mechanical engineering, electrical engineering, control engineering, and computer hardware and software engineering, are covered. The book offers guidelines and covers design for machine tools, prototyping, augmented reality for machine tools, modern communication strategies, and enterprises of functional reverse engineering, along with case studies. Features Presents capacity building in machine tool development Discusses engineering design for machine tools Covers prototyping of strategic and non-strategic machine tools Illustrates augmented reality for machine tools Includes Internet of Things (IoT) for machine tools

Download or read book Outdoor Air Pollution written by IARC Working Group on the Evaluation of Carcinogenic Risks to Humans and published by IARC Monographs on the Evaluat. This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This publication represents the views and expert opinions of an IARC Working Group on the Evaluation of Carcinogenic Risk to Humans, which met in Lyon, 8-15 October 2013."

Download or read book Proceedings of Mechanical Engineering Research Day 2020 written by Mohd Fadzli Bin Abdollah and published by Centre for Advanced Research on Energy. This book was released on 2020-12-01 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This e-book is a compilation of 170 articles presented at the 7th Mechanical Engineering Research Day (MERD'20) - Kampus Teknologi UTeM (virtual), Melaka, Malaysia on 16 December 2020.