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| Registros recuperados: 27 | |
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| Alves,Andrea Catão; Gontijo,Cristiano Machado; Oliveira,Mônica Cristina; Diniz,Simone Odília Fernandes; Oliveira,Flávia Márcia; Cardoso,Valbert Nascimento; Ramaldes,Gilson Andrade. |
| The oral administration of proteic antigens, like ovalbumin, may result in the induction of oral tolerance or immunization. The aim of this work was to label a protein antigen with 99mTechnetium, encapsulate it in liposomes and investigate its absorption and tissue distribution after oral administration in mice. Ovalbumin was labeled with 99mTechnetium and encapsulated in small unilamellar vesicles. 99mTc-OVA encapsulated or not in liposomes was administrated to mice that were sacrificed after different times. The radioactivity was measured in various organs of the animals. Differences concerning the biodistribution of 99mTc-OVA were noticed. The technique may represent alternatives for the induction of immunization or oral tolerance. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Liposomes; Oral absorption; Mucosal delivery; Proteins; Nanotechnology. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000700035 |
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| Erdem, Seda; Rigby, Dan. |
| We present research findings on consumers’ willingness to pay (WTP) for reductions in the level of foodborne health risks. The research addresses how such valuations are affected by the means of which the risk reduction is delivered and the methods of risk presentations used in choice tasks. In this case, the research has two treatments. In the first treatment, the comparison is between risk reductions achieved by an improvement in the food system in general (e.g., more stringent regulations and inspection regimes) within the slaughter and meat processing stages of the food chain, as opposed to a risk reduction achieved via innovations in food packaging using nanotechnology, which is the use of nanosensors in packaging. If there is a contamination in... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Discrete Choice Experiments; Nanotechnology; Nanosensors; Health Risks; Grids; UK; Health Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/108950 |
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| Ramírez Mella, Mónica. |
| La presente tesis se compone de la Introducción General, Revisión de literatura, tres capítulos que engloban la investigación, objeto de este estudio, y Conclusiones y Recomendaciones Generales. El Capítulo 1 consiste en un artículo de revisión de literatura que enmarca la importancia de proteger ingredientes y/o compuestos del ataque de microrganismos a nivel ruminal, donde la nanotecnología ocupa un papel importante. En el Capítulo 2 se discute el efecto de la vitamina E en la composición de la leche de vacas en pastoreo que recibieron un suplemento de ácido linoleico conjugado microencapsulado, así como un análisis económico del mismo. El Capítulo 3 consiste en el estudio del efecto de la vitamina E en la fermentación ruminal y la digestión de... |
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Palavras-chave: Nanotecnología; Microencapsulación; CLA; Grasa en leche; Vacas en pastoreo; Nanotechnology; Microencapsulation; Fat milk; Grazing dairy cows; Ganadería; Doctorado. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1743 |
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| Salles, Denis; Roumezi, Alexis; Lanceleur, Laurent; Schaefer, Jorg; Petit, Jerome; Blanc, Gerard; Coynel, Alexandra; Chiffoleau, Jean-francois; Auger, Dominique. |
| This article presents the results of multidisciplinary research (geochemistry, sociology) into the increasing concentrations of silver (Ag and nanoAg) in the environment and their potential impact on aquatic environments. We investigate simultaneously the risk of contamination of these environments by silver and the process of the social and political construction of this risk by water managers, health authorities, agencies and committees responsible for expert evaluations, environmental associations, and potential users of silver or nano-silver. Four updated models of risk construction allow us to understand the logic of arguments mobilized at this stage of the emerging risk. This interdisciplinary cooperation opens up possibilities for dealing with some... |
| Tipo: Text |
Palavras-chave: Environment; Estuaries; Geochemistry; Interdisciplinary communication; Nanotechnology; Risk assessment; Risk management; Silver; Sociology; Water pollutants. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00156/26736/24939.pdf |
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| Juárez-Maldonado,A; Rosales-Velázquez,JL; Ortega-Ortiz,H; Cabrera-De-la-Fuente,M; Ramírez,H; Benavides-Mendoza,A. |
| Nanotechnology is currently an important worldwide study field because it provides control on matter at a nanometric scale. In food and agricultural fields, the applications of this technology are in early stages. Onion is one of the main vegetables grown in the world. Onion is a low calorie food which contains a large amount of flavonoids. In this work, silver nitrate application in onion was evaluated. An onion crop was developed at the University Antonio Narro in Saltillo, Mexico. Two methods of silver nitrate application were used (a nutritive solution: 0, 20, 40 and 80 mg/L of AgNO3; and foliar spray: 0, 20 and 40 mg/L of AgNO3). The samples were taken at 30, 60 and 90 days after transplanting. Total antioxidant capacity, silver accumulation and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanotechnology; Onion; Silver nitrate; Nanoparticles. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100013 |
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| Yurgel,V.; Collares,T.; Seixas,F.. |
| The application of nanotechnology to medicine can provide important benefits, especially in oncology, a fact that has resulted in the emergence of a new field called Nanooncology. Nanoparticles can be engineered to incorporate a wide variety of chemotherapeutic or diagnostic agents. A nanocapsule is a vesicular system that exhibits a typical core-shell structure in which active molecules are confined to a reservoir or within a cavity that is surrounded by a polymer membrane or coating. Delivery systems based on nanocapsules are usually transported to a targeted tumor site and then release their contents upon change in environmental conditions. An effective delivery of the therapeutic agent to the tumor site and to the infiltrating tumor cells is difficult... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanotechnology; Nanocapsules; Nanocarriers; Cancer. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000600486 |
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| Schnettler,Berta; Crisóstomo,Gloria; Mills,Natally; Miranda,Horacio; Mora,Marcos; Lobos,Germán; Grunert,Klaus G. |
| In light of the increasing use of nanotechnology in food production, consumer acceptance of sunflower oil produced with nanotechnology or from genetically modified (GM) plants and the conventionally produced raw materials available in Temuco (Araucanía Region, Chile), market segments were differentiated with respect to their acceptance of nanotechnology and characterized according to their sociodemographic characteristics and food neophobia level. To achieve this aim, a survey was administered to 400 people. Using a conjoint analysis, the brand (33.6%) and production system (32.6%) were determined to be more important than the price (19.2%) and health certification (14.6%); national brands, produced conventionally with a health certification seal and sold... |
| Tipo: Journal article |
Palavras-chave: Sunflower oil; Transgenic food; Nanotechnology. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100002 |
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| Joviano-Santos,J.V.; Sá,M.A.; De Maria,M.L.A.; Almeida,T.C.S.; Geraldo,V.; Oliveira,S.; Ladeira,L.O.; Ferreira,A.J.. |
| It has been demonstrated that carbon nanotubes (CNTs) associated with sodium hyaluronate (HY-CNTs) accelerate bone repair in the tooth sockets of rats. Before clinical application of HY-CNTs, it is important to assess their biocompatibility. Moreover, cardiac toxicity may be caused by the translocation of these particles to the blood stream. The aim of this study was to evaluate possible changes in cardiovascular function in male Wistar rats whose tooth sockets were treated with either CNTs or HY-CNTs (100 μg/mL, 0.1 mL). Blood pressure and heart rate were monitored in conscious rats 7 days after treatment. Cardiac function was evaluated using the Langendorff perfusion technique. The data showed no changes in blood pressure or heart rate in rats treated... |
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Palavras-chave: Cardiac function; Blood pressure; Carbon nanotubes; Nanotechnology; Bone repair; Tooth sockets. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000700560 |
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| Vulcani,V.A.S.; Franzo,V.S.; Rabelo,R.E.; Rabbers,A.S.; Assis,B.M.; D'Ávila,M.A.; Antoni,S.M.B.. |
| Electrospinning is a technique that allows the preparation of nanofibers from various materials. Chitosan is a natural and abundant easily obtained polymer, which, in addition to those features, proved to be biocompatible. This work used nanostructured chitosan and polyoxyethylene membranes as subcutaneous implants in Wistar rats to evaluate the biocompatibility of the material. Samples of the material and tissues adjacent to the implant were collected 7, 15, 30, 45 and 60 days post-implantation. Macroscopic integration of the material to the tissues was observed in the samples and slides for histopathological examination that were prepared. It was noticed that the material does not stimulate the formation of adherences to the surrounding tissues and that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanotechnology; Biomaterials; Electrospinning. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000401039 |
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| Volpato,A; Lorenzetti,WR; Zortea,T; Giombelli,LCDD; Baretta,D; Santos,RCV; Vaucher,RA; Raffin,RP; Souza,ME; Stefani,LM; Boligon,AA; Athayde,ML; Silva,AS da. |
| ABSTRACT The aim of this study was to evaluate the in vitro bioactivity of tea tree (Melaleuca alternifolia) essential oil against larvae and adult forms of lesser mealworms (Alphitobius diaperinus) and its influence on the soil fauna. Tests were performed in triplicate using pure tea tree oil (TTO; 1, 5, 10, 25, 50, and 100%), TTO nanoparticles (1, 3, and 7.5%), or terpinen-4-ol, the main compound of the tea tree oil, at the same concentrations of TTO. Larvae and adult mortality occurred at concentrations up to 10 and 50% of TTO, respectively. No larvicidal or insecticidal effect of TTO nanoparticles was observed. Terpinen-4-ol showed insecticidal and larvicidal effect at concentrations higher than 25%. The evaluation of TTO effect on soil organisms was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alphitobius diaperinus; Essential oil; Natural products; Nanotechnology; Pest management. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000100041 |
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| Registros recuperados: 27 | |
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