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Uma proposta para o ensino de nanociência e da nanotecnologia, nas aulas de física do ensino médio; A proposal for teaching nanoscience and nanotechnology, in high school physics classes

Gama, Cátia Fernandes
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 30/09/2013 PT
Relevância na Pesquisa
36.94%
O objetivo deste trabalho é investigar o ensino e aprendizado de conceitos da nanociência e da nanotecnologia no ensino médio, envolvendo o estudo dos nanomateriais e seus impactos na sociedade. Muitas vezes a percepção da nanociência e da nanotecnologia está associada a atividades científicas desenvolvidas em laboratórios sofisticados e caros, o que estabelece uma barreira para o seu ensino e aprendizagem. Sendo o carbono um elemento muito comum na natureza, o estudo das nanopartículas de carbono permite introduzir conceitos da nanociência e da nanotecnologia em sala de aula, utilizando materiais de baixo custo, e assim possibilitando a aproximação dos alunos de um dos ramos centrais da ciência atual.; The purpose of this study is to investigate the teaching and learning of concepts of nanoscience and nanotechnology in high school, involving the study of nanomaterials and its impact on society. Many times the perception of nanoscience and nanotechnology is associated with scientific activities developed in sophisticated and expensive laboratories; this idea establishes a barrier to teaching and learning. Since carbon is a very common element in nature, the study of carbon nanoparticles allows us to introduce concepts of nanoscience and nanotechnology in the classroom...

Nanotecnologia em diagnóstico e terapia no Brasil; Nanotechnology in diagnosis and therapy in Brazil

Silva, Ana Carolina Costa da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 08/07/2015 PT
Relevância na Pesquisa
37.09%
Os nanomateriais, nanopartículas e nanocompósitos apresentam novas propriedades físicas e químicas, que combinam as do mundo clássico com as do mundo quântico, e despontam de maneira surpreendente na ciência e na vida cotidiana impulsionando a era da nanotecnologia. Os avanços tecnológicos nessa nova ciência estão atrelados à descoberta de materiais com características inovadoras e as moléculas atualmente são peças chaves de sistemas mais elaborados e projetados para maior desempenho. A presente dissertação teve como principal proposta levantar o estado da arte da utilização da nanotecnologia em diagnóstico e terapia no panorama nacional. O trabalho abordou pesquisa bibliográfica em bases de dados e pesquisa de campo com entrevistas semi estruturadas a profissionais locais atuantes na área biomédica. A coleta de dados evidenciou o progresso da nanotecnologia em função do tempo de acordo ao crescimento do número de publicações desde os primeiros artigos publicados até o presente e mostrou que ainda é incipiente o número de referências da nanotecnologia dentro da área nuclear: IAEA/INIS 25.948, frente a MEDLINE 90.627, PubMed 102.738 e Scopus 268.299 em maio 2015. A revisão bibliográfica contextualizou e embasou os conceitos...

Impactos da nanotecnologia na saúde : produção de medicamentos; Impact of nanotechnology on public health : production of medicines

Dimer, Frantiescoli Anversa; Friedrich, Rossana Barcellos; Beck, Ruy Carlos Ruver; Guterres, Silvia Stanisçuaski; Pohlmann, Adriana Raffin
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: application/pdf
POR
Relevância na Pesquisa
37.01%
Several studies have described the benefits of nanoscience and nanotechnology (N&N) in different sectors such as agriculture, energy, environmental preservation, and public health. The rapid evolution of N&N can be shown through a panoramic analysis of scientific papers and patents. In the area of public health, it is estimated that the global market for nanotechnology products will expand to 160 billion U.S. dollars in 2015. The Brazilian government has also strengthened its innovative potential in N&N through economic subsidies, as observed for other countries. This review is focused on the current landscape of N&N in a therapeutic context, highlighting the development of nanotech-products produced with biocompatible and biodegradable materials that are already commercially available or under investigation. Most studies under investigation are focused on the development of nanotechnology-based formulations intended for treatment of cancer, inflammatory, cardiovascular, and neurological diseases. Although there are several advantages of N&N in healthcare, many challenges have to be conquered to increase the availability of nanotechnology products in toxicological, preclinical and clinical studies, scale-up, regulatory, and private investments.

Lack of reliability of nanotechnology in the of free plasma DNA in samples of patients with prostate cancer

Moreno, Ricardo; Delgado, Pamela O; Coelho, Patrícia G; Marsicano, Sarah R; Boas, Viviane Av; Azzalis, Ligia A; Junqueira, Virgínia Bc; Rocha, Katya C; De Abreu, Luiz Carlos; Valenti, Vitor E; Drezzet, Jefferson; Pereira, Edimar Cristiano; Fonseca, Fern
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
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Background: Several studies seek biological markers that give diagnostic and degree of tumor development. The aim of this study was to validate the determination of plasma DNA using nanotechnology (Nanovue™-NV) in samples of 80 patients with prostate cancer. Methods. Blood samples of 80 patients of the Urology Ambulatory of Faculdade de Medicina do ABC with prostate cancer confirmed by anatomical-pathology criteria were analyzed. DNA extraction was performed using a GFX TM kit (Amersham Pharmacia Biotech, Inc, USA) following the adapted protocol. Plasma was subjected to centrifugation. Results: There was a big difference between the first and the second value obtained by NanoVue Only two samples had no differences between duplicates. Maximum difference between duplicates was 38 μg/mL. Average variation between 51 samples was 10.29 μg/mL, although 21 samples had differences above this average. No correlation was observed between pDNA obtained by traditional spectrophotometry and by nanotechnology. Conclusion: Determination of plasma DNA by nanotechnology was not reproducible. © 2013 Moreno et al; licensee BioMed Central Ltd.

Introduction to nanotechnology in eco-efficient construction

Torgal, Fernando Pacheco
Fonte: Woodhead Publishing Publicador: Woodhead Publishing
Tipo: Parte de Livro
Publicado em //2013 ENG
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This chapter provides a brief overview of some important aspects of nanotechnology starting with its earlier steps and how countries are trying to establish an advantageous position in this field. China deserves a special mention because it is already the second largest producer of nanotechnology papers after the United States. The need for nanotechnology in the construction sector is emphasized. An outline of the book is given.

Potential applications of nanotechnology in the agro-food sector

García,Mario; Forbe,Tamara; Gonzalez,Eric
Fonte: Sociedade Brasileira de Ciência e Tecnologia de Alimentos Publicador: Sociedade Brasileira de Ciência e Tecnologia de Alimentos
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2010 EN
Relevância na Pesquisa
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Nanoscience and nanotechnology are new frontiers of this century. Their application to the agriculture and food sectors is relatively recent compared with their use in drug delivery and pharmaceuticals. Smart delivery of nutrients, bioseparation of proteins, rapid sampling of biological and chemical contaminants, and nanoencapsulation of nutraceuticals are some of the emerging topics of nanotechnology for food and agriculture. In this review, some applications of nanotechnology in agro-food sector are discussed.

Study on the development of nanotechnology in advanced countries and in Brazil

Rediguieri,Carolina Fracalossi
Fonte: Universidade de São Paulo, Faculdade de Ciências Farmacêuticas Publicador: Universidade de São Paulo, Faculdade de Ciências Farmacêuticas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2009 EN
Relevância na Pesquisa
37.01%
The study shows how nanotechnology evolves in developed countries and Brazil, raising aspects of private and governmental initiatives. The investigation was based in scientific literature, electronic articles and conference reports. Several sources of literature were used, including electronic databases and reference lists. By this study, it was observed that, although nanotechnology is in initial stage of development all over the world, the developed countries have had growing public and private investments in the area each year. In those countries, there is a concern toward both, the formation of specialists in nanotechnology and the transference of technology developed in universities and research institutes to industry. In Brazil, the study showed that despite the growing concern of investigators, national research centers and financial centers toward the development of the nanotechnology, there is still a need for more investment and formation of area specialists.

Nanotechnology Research: Applications in Nutritional Sciences12

Srinivas, Pothur R.; Philbert, Martin; Vu, Tania Q.; Huang, Qingrong; Kokini, Josef L.; Saos, Etta; Chen, Hongda; Peterson, Charles M.; Friedl, Karl E.; McDade-Ngutter, Crystal; Hubbard, Van; Starke-Reed, Pamela; Miller, Nancy; Betz, Joseph M.; Dwyer, Joh
Fonte: American Society for Nutrition Publicador: American Society for Nutrition
Tipo: Artigo de Revista Científica
Publicado em /01/2010 EN
Relevância na Pesquisa
37.09%
The tantalizing potential of nanotechnology is to fabricate and combine nanoscale approaches and building blocks to make useful tools and, ultimately, interventions for medical science, including nutritional science, at the scale of ∼1–100 nm. In the past few years, tools and techniques that facilitate studies and interventions in the nanoscale range have become widely available and have drawn widespread attention. Recently, investigators in the food and nutrition sciences have been applying the tools of nanotechnology in their research. The Experimental Biology 2009 symposium entitled “Nanotechnology Research: Applications in Nutritional Sciences” was organized to highlight emerging applications of nanotechnology to the food and nutrition sciences, as well as to suggest ways for further integration of these emerging technologies into nutrition research. Speakers focused on topics that included the problems and possibilities of introducing nanoparticles in clinical or nutrition settings, nanotechnology applications for increasing bioavailability of bioactive food components in new food products, nanotechnology opportunities in food science, as well as emerging safety and regulatory issues in this area, and the basic research applications such as the use of quantum dots to visualize cellular processes and protein-protein interactions. The session highlighted several emerging areas of potential utility in nutrition research. Nutrition scientists are encouraged to leverage ongoing efforts in nanomedicine through collaborations. These efforts could facilitate exploration of previously inaccessible cellular compartments and intracellular pathways and thus uncover strategies for new prevention and therapeutic modalities.

From Lab to market: Strategies and issues in the commercialization of nanotechnology in China

Shapira, Philip; Wang, Jue
Fonte: SelectedWorks Publicador: SelectedWorks
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
37.17%
Nanotechnology is expected by many to be one of the next drivers of technology-based business and economic growth. China has emerged as a global player in nanotechnology development, and now ranks second (after the United States) in nanotechnology scientific publications produced annually. The study of nanotechnology offers a lens to examine China’s capabilities to move closer to the frontier of technology-led economic development, explore the evolving Chinese innovation system, and assess the effectiveness of policy strategies to modernize and add-value to research and industry in China. Supported by new policy initiatives and funding, hundreds of institutions and thousands of researchers in China are engaged in nanotechnology R&D. Yet, although Chinese nanotechnology research has scale, the pathways from laboratory research to successful commercialization remain problematic. Chinese performance in nanotechnology patenting and product development is weak relative to its research strength, suggesting a significant gap between the research base and industrial development. Drawing on bibliometric research and field interviews with Chinese nanotechnology policymakers, researchers and business representatives, we analyze this gap, explore the factors contributing to it and assess future commercialization trajectories.

R&D Policy in the United States: The Promotion of Nanotechnology

Shapira, Philip; Wang, Jue
Fonte: SelectedWorks Publicador: SelectedWorks
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
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This case study reviews the evolution of nanotechnology policies and programmes in the United States with a particular focus on three thematic areas: governance, interactions among R&D policies, and interaction between R&D policy and non-R&D policies. Federal R&D policy in nanotechnology has moved through several stages, including initial exploration before the 1980s, the promotion of scientific and technological breakthroughs in the 1980s, policy development in the 1990s and multiagency national initiatives in the 2000s. Since 2001, the major federal R&D policy mechanism in nanotechnology in the US has been the National Nanotechnology Initiative (NNI). NNI promotes policy deliberation and, most importantly, coordinates federal R&D investment in nanotechnology. ThePolicy Mix Project was coordinated by coordinated by the lead partner UNU-MERIT (Netherlands), with sponsorship from the European Commission, Directorate General for Research.

Nanotechnology: The Next Challenge for Organics

Paull, John; Lyons, Kristen
Fonte: Journal of Organic Systems Publicador: Journal of Organic Systems
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.94%
Nanotechnology is the fast growing science of the ultra small; it is creating engineered particles in the size range 1 to 100 nanometres. At this size, materials exhibit novel behaviours. Nanotechnology is a rapidly expanding multibillion dollar industry, with research being heavily promoted by governments, and especially the US. Nanoscale materials are already incorporated into more than 580 consumer products, including food, packaging, cosmetics, clothing and paint. Nanotechnology has been cited as the foundation of a new “advanced agriculture”. This technology is advancing without nano-specific regulation and without labelling while, at the same time, public confidence in government regulatory agencies, and in the safety of the food supply, is declining. There is an opportunity, perhaps an imperative, for the organic community to take the initiative to develop standards to exclude engineered nanoparticles from organic products, just as GMOs have been excluded previously.

Nanotechnology, No Free Lunch

Paull, John
Fonte: Platter, technical journal for the food industry Publicador: Platter, technical journal for the food industry
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
37.06%
Nanotechnology is the new science and technology of the super small. Particles at the nano-scale, from one to one hundred billionths of a metre, exhibit novel properties. Nanotechnology is an active area of research and rapid commercialization. The food industry has been targeted as a potential recipient of this new technology and engineered nanoparticles are reportedly already in some super-market products. Nanotechnology is currently unregulated, and there are no requirements for mandatory labelling, this leaves consumers unprotected and uninformed. Consumers are largely unaware of nanotechnology, expect labelling on nano-products, are unclear of the cost/benefit balance, and express an unwillingness to purchase nanofood. The asymmetric information status of nanotechnology, together with its undetermined safety, raises issues, opportunities, and risks for food manufacturers and retailers.

Mythogenesis and nanotechnology: Future medical directions

Saniotis, A.
Fonte: Graduate Institute of Futures Studies, Tamkang University Publicador: Graduate Institute of Futures Studies, Tamkang University
Tipo: Artigo de Revista Científica
Publicado em //2008 EN
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37.01%
Nanotechnology promises an array of inventions and technological developments in the realm of medical science. Together with new bio-technologies, nanotechnology offers a formidable science of medical discovery. Atkinson ascribes nanotechnology to a nanocosm; a foreign world unlike anything the human mind can imagine, a finely structured cosmos or organised universe; a subworld with its own principles of organisation, ambiguous and wondrous. This paper provides some understanding of the future medical possibilities of nanotechnology.; http://www.airiti.com/CEPS/ec_en/ecjnlarticleView.aspx?jnlcattype=0&jnlptype=0&jnltype=0&jnliid=986&issueiid=65692&atliid=1117434; Arthur Saniotis; © 2008 by airiti Inc. All Rights Reserved.

Military Applications of Nanotechnology: Implications for Strategic Cooperation & Conflict

Center on Contemporary Conflict
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Relatório
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36.94%
FY 2012-2013. Project Leads: Kosal, Margaret E.; The report will advance critical thinking on the potential role and impact of nanotechnology on defense policy. It will view nanotechnology through the prism of international cooperation and competition, examining whether emerging nanotechnology will exacerbate or mitigate regional security challenges.

Governing Nanotechnology in a Globalized World: Cross-National Dimensions and Strategic Assessments of a Disruptive Technology

Center on Contemporary Conflict
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Relatório
Relevância na Pesquisa
36.94%
FY 2013-2014. Project Lead: Anne Clunan & Kirsten Rodine Hardy; While those in the nanotechnology field emphasize the benefits for medicine, travel, and manufacturing, it is a dual-use technology that could lead to a disruptive and expensive arms race for technology dominance. Nanotechnology has significant implications for globalization, technological governance, and national sovereignty. Through a cross-national and strategic lens, the project will analyze the potential threats to national security and competitiveness arising from nanotechnology and its governance. The project will also explore the threats and opportunities for U.S. national security and economic prosperity from commercial and military nanotechnologies, divergent nanotech developmental strategies, and emerging governance structures in critical countries.

Prospecção tecnológica a médio e longo prazo sobre o desenvolvimento e aplicações da nanotecnologia em materiais poliméricos; Technological prospection on medium and long term on the development and applications of nanotechnology in polymeric materials

Carla Carolina Caliani Franchini de Almeida
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 22/06/2012 PT
Relevância na Pesquisa
37.01%
O desenvolvimento e a aplicação de novas propriedades de materiais e de novos materiais propriamente ditos, tem sido um grande objetivo dos pesquisadores. Estamos em uma etapa do conhecimento científico-tecnológico onde a nanotecnologia, em particular, está se tornando presente em todas as áreas da ciência e da tecnologia. Desta forma, os pesquisadores estão investigando maneiras de recorrerem à nanotecnologia em alta escala, determinando suas características a fim de utilizá-las adequadamente, proporcionando novos tipos de materiais. Uma das áreas de P&D em nanotecnologia, importantes nas atividades acadêmicas e industriais, está voltada para os materiais poliméricos, em nanocompósitos. Este trabalho teve como principal finalidade conhecer como a nanotecnologia se faz presente nos materiais poliméricos, recorrendo aos pesquisadores/especialistas na área, e investigar quais as possibilidades futuras de utilização destes novos materiais junto à sociedade como um todo, por meio da de prospecção tecnológica. Todavia, para uma prospecção adequada, neste caso determinado, é necessário a utilização de ferramentas próprias, para se obter uma resposta cujas possibilidades sejam próximas às reais. Recorreu-se aqui...

Acceptance of nanotechnology applications and satisfaction with food-related life in southern Chile

Schnettler,Berta; Crisóstomo,Gloria; Mora,Marcos; Lobos,Germán; Miranda,Horacio; Grunert,Klaus G.
Fonte: Sociedade Brasileira de Ciência e Tecnologia de Alimentos Publicador: Sociedade Brasileira de Ciência e Tecnologia de Alimentos
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2014 EN
Relevância na Pesquisa
37.09%
Given the increasing use of nanotechnology in food production and packaging, its acceptance was evaluated in Temuco, Chile, and different consumer segments were identified. Different brands of sunflower oil were used at different prices as a case study. A structured questionnaire was applied to 400 supermarket shoppers. It was determined that brand was more important than nanotechnology application in packaging and food, and more important than price. The consumers preferred an average priced oil with a manufacturer's brand with nanoparticles to reduce cholesterol, and packaging with nanoparticles to increase the shelf life of the product and to prevent the growth of microorganisms. Three consumer segments were distinguished by the cluster analysis. The largest segment (44%) preferred the oil without nanotechnology. The second (35.2%) preferred the oil with nanotechnology in the food and the packaging, and the greatest preference was for packaging with nanoparticles extension in the shelf life of the product. The third segment (20.8%) had similar behavior, but it showed greater preference for the oil with nanoparticles that reduced cholesterol and for the packaging that prevented the growth of bacteria and viruses. The segments differed in terms of their satisfaction with food-related life and lifestyle. It was found that over 50% of the participants preferred oil with nanotechnology applications.

Acceptance of nanotechnology applications and satisfaction with food-related life in southern Chile

Mora González, Marcos Germán; Grunert, Klaus G.; Miranda, Horacio; Crisóstomo, Gloria; Lobos, Germán; Schnettler, Berta
Fonte: Universidade do Chile Publicador: Universidade do Chile
Tipo: Artículo de revista
EN
Relevância na Pesquisa
37.06%
Artículo de publicación Scielo; Given the increasing use of nanotechnology in food production and packaging, its acceptance was evaluated in Temuco, Chile, and different consumer segments were identified. Different brands of sunflower oil were used at different prices as a case study. A structured questionnaire was applied to 400 supermarket shoppers. It was determined that brand was more important than nanotechnology application in packaging and food, and more important than price. The consumers preferred an average priced oil with a manufacturer’s brand with nanoparticles to reduce cholesterol, and packaging with nanoparticles to increase the shelf life of the product and to prevent the growth of microorganisms. Three consumer segments were distinguished by the cluster analysis. The largest segment (44%) preferred the oil without nanotechnology. The second (35.2%) preferred the oil with nanotechnology in the food and the packaging, and the greatest preference was for packaging with nanoparticles extension in the shelf life of the product. The third segment (20.8%) had similar behavior, but it showed greater preference for the oil with nanoparticles that reduced cholesterol and for the packaging that prevented the growth of bacteria and viruses. The segments differed in terms of their satisfaction with food-related life and lifestyle. It was found that over 50% of the participants preferred oil with nanotechnology applications.; Fondecyt Project 1100611

Study on the development of nanotechnology in advanced countries and in Brazil

Rediguieri, Carolina Fracalossi
Fonte: Universidade de São Paulo. Faculdade de Ciências Farmacêuticas Publicador: Universidade de São Paulo. Faculdade de Ciências Farmacêuticas
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/06/2009 ENG
Relevância na Pesquisa
37.01%
O presente trabalho faz um estudo sobre o desenvolvimento da nanotecnologia, com enfoque na área de saúde, em países tecnologicamente mais avançados e no Brasil, levantando aspectos de iniciativas governamentais e privadas. A investigação foi baseada em literatura científica, artigos eletrônicos e relatórios de conferências. Foi observado que, apesar da nanotecnologia estar em estágio inicial no mundo inteiro, os países tecnologicamente mais avançados têm tido investimentos crescentes na área a cada ano, tanto públicos quanto privados. Há grande preocupação nesses países quanto à formação de profissionais especialistas na área e à transferência da tecnologia desenvolvida por universidades e institutos de pesquisa para a indústria. No Brasil, o estudo mostrou que apesar da crescente preocupação dos pesquisadores, centros de pesquisa e centros de financiamento com o desenvolvimento da nanotecnologia, ainda há necessidade de maiores investimentos e formação de profissionais especialistas na área.; The study shows how nanotechnology evolves in developed countries and Brazil, raising aspects of private and governmental initiatives. The investigation was based in scientific literature, electronic articles and conference reports. Several sources of literature were used...

Advancing DNA-based Nanotechnology Capabilities and Applications

Marchi, Alexandria Nicole
Fonte: Universidade Duke Publicador: Universidade Duke
Tipo: Dissertação
Publicado em //2014
Relevância na Pesquisa
36.94%

Biological systems have inspired interest in developing artificial molecular self-assembly techniques that imitate nature's ability to harness chemical forces to specifically position atoms within intricate assemblies. Of the biomolecules used to mimic nature's abilities, nucleic acids have gained special attention. Specifically, deoxyribonucleic acid is a stable molecule with a readily accessible code that exhibits predictable and programmable intermolecular interactions. These properties are exploited in the revolutionary structural DNA nanotechnology method known as scaffolded DNA origami. For DNA origami to establish itself as a widely used method for creating self-assembling, complex, functional materials, current limitations need to be overcome and new methods need to be established to move forward with developing structures for diverse applications in many fields. The limitations discussed in this dissertation include 1) pushing the scale of well-formed, fully-addressable origami to two and seven times the size of conventional origami, 2) testing cost-effective staple strand synthesis methods for producing pools of oligos for a specified origami, and 3) engineering mechanical properties using non-natural nucleotides in DNA assemblies. After accomplishing the above...