Consulta: subjectFacets:"Nanotechnology"
Registros recuperados: 27
Data/hora: 12/06/2024 12:41:36

Efecto de la vitamina E en la función digestiva y composición de la leche de bovinos alimentados con un suplemento de ácido linoleico conjugado protegido.
Provedor de dados: 32
Autores: 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...
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

Avanços no agronegócio: emprego da nanotecnologia para aumento do shelf-life de ovos comerciais.
Provedor de dados: 14
Autores: MAZZUCO, H.; FONSECA, F. N. da.
Neste estudo, os diferentes recobrimentos serão desenvolvidos e testados, avaliando-se as propriedades do produto nanotecnológico e as melhoras na qualidade microbiológica combinadas ao seu uso em ovos comerciais.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Qualidade da ovo; Comércio do ovo; Nanotecnologia; Ovo; Casca de ovo; Egg industry; Egg shell; Nanotechnology.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1031280

Emprego e adaptação do método GMP-RAM para avaliação dos riscos das nanotecnologias.
Provedor de dados: 14
Autores: BUENO, C. de C.; JESUS, K. R. E. de.
Resumo: A Nanotecnologia está baseada na crescente capacidade da tecnologia moderna em manipular átomos e partículas na nanoescala para criar novos materiais e desenvolver novos produtos e processos. Ela promete grandes avanços nas mais diversas áreas de atuação, desde a Medicina à Engenharia de Materiais. Apesar dos materiais nanoestruturados apresentarem propriedades físicas diferentes do seu correspondente convencional, ainda não há metodologias para avaliação de riscos direcionadas ao uso intensivo desses novos materiais e substâncias químicas. Neste cenário, o presente trabalho propõe o emprego e adequação de uma metodologia comumente empregada para a avaliação de risco de transgênicos para o caso das nanotecnologias. O método GMP-RAM já foi empregado...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Nanotecnologia; Avaliação de risco; Metodologia; Análise de risco; Risk assessment; Nanotechnology.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/912790

L'argent (Ag, nanoAg) comme contaminant émergeant dans l'Estuaire de la Gironde : évaluations scientifiques et gouvernance des risques
Provedor de dados: 5
Autores: 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

Polymeric Nanoparticles in Dermocosmetic
Provedor de dados: 77
Autores: Bahamonde-Norambuena,D; Molina-Pereira,A; Cantin,Mario; Muñoz,M; Zepeda,Katherine; Vilos,Cristian.
Recent advances in the fields of biomaterials and nanotechnology have allowed the development of advanced nanoparticles for biomedical applications. Despite a vast number of nanostructures such as liposomes, solid­lipid nanocapsules, polymeric and hybrid lipid­polymer nanoparticles have been studied as carriers for drug delivery for different pathologies with remarkable promising results; the use of polymeric nanoparticles in dermocosmetic still has not been widely explored. The evolution of cosmetic into the care skin and dermatology represents novel technological challenges. Also, the increasing knowledge about normal skin physiology and advances in nanotechnology provide an attractive environment for the creation of innovative dermocosmetic...
Tipo: Journal article
Palavras-chave: Nanotechnology; Polymeric nanoparticles; Cutaneous morphology; Cosmetic; Dermocosmetic.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000400061

Accumulation of silver nanoparticles and its effect on the antioxidant capacity in Allium cepa L
Provedor de dados: 85
Autores: 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

An Exploration of Irish Consumer Acceptance of Nanotechnology Applications in Food
Provedor de dados: 31
Autores: Greehy,   Grainne; McCarthy,   Mary; Henchion,   Maeve M.; Dillon,   Emma J.; McCarthy,   Sinead.
Nanotechnology has come to the attention of food stakeholders in recent years. It offers many potential benefits to food companies and consumers, for example the ability to produce healthier food without compromising taste, but it has also generated much debate, in particular about potential unknown risks associated with food applications of nanotechnology. This research provides some insights into Irish consumer acceptance of food related applications of nanotechnology and details the determining factors framing consumers’ attitudes. Key issues investigated include consumers’ awareness of and attitudes towards nanotechnology, the subjective values (including perceived risk-benefit trade-offs) that frame these attitudes and the influence of new information...
Tipo: Presentation
Palavras-chave: Novel food technologies; Nanotechnology; Consumer acceptance; Risk perceptions; Risk communication; Deliberative discourse; Agribusiness; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011
URL: http://purl.umn.edu/122006

Using a Discrete Choice Experiment to Elicit Consumers’ WTP for Health Risk Reductions Achieved By Nanotechnology in the UK
Provedor de dados: 31
Autores: 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

Productivity of Nanobiotechnology Research and Education in U.S. Universities
Provedor de dados: 31
Autores: Xia,   Yin.
The National Science Foundation (NSF) estimates that nanotechnology will become a trillion-dollar industry by 2015 and that 800,000 workers will be needed in this field in the United States.  Nanobiotechnology ― the interface of nanotechnology and the life sciences ― is one of the most active and promising application frontiers in nanotechnology.  To assess the productivity of basic and applied research and education in this field, I construct a structural model composed of a system of three equations which respectively represent the productions of a university’s scientific publications, patents, and graduate training outputs.  The model is estimated using a unique data set on thirty universities that participated in nanobiotechnology during the 1990-2005...
Tipo: Conference Paper or Presentation
Palavras-chave: Nanotechnology; Graduate education; University research; Productivity; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/49442

Melaleuca alternifolia Essential Oil against the Lesser Mealworm (Alphitobius diaperinus) and Its Possible Effect on the Soil Fauna
Provedor de dados: 89
Autores: 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

Use of Nanoparticles in Soil-Water Bioremediation Processes
Provedor de dados: 127
Autores: Duran,N.
Tipo: Journal article
Palavras-chave: Nanoparticles; Bioremediation processes; Nanotechnology.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000400007

Development, characterization and stability of microemulsionated formulations of bacaba, Oenocarpus bacaba oil
Provedor de dados: 36
Autores: TORRES,Maycon de Paula Ribeiro; ESPRENDOR,Rhuan Vínicius de Freitas; BONALDO,Solange Maria; RIBEIRO,Elton Brito; VALLADÃO,Dênia Mendes de Sousa.
ABSTRACT Advances in nanotechnology, combined with the use of natural products, represent a promissing research field. Brazil is a country of a rich biodiversity, especially in the Amazon forest. Fruits commonly used by local communities, such as bacaba (Oenocarpus bacaba), are potentially important for prospection of industrial applications of natural products. In nanotechnology, microemulsions stand out for providing a modified release to conveyed substances. This work aimed to develop microemulsionated formulations of bacaba oil, characterize them and evaluate their stability. We determined the HLB (hydrophile-lipophilic balance) of bacaba oil for formulation development. Six formulations were selected from pseudoternary diagrams, which indicated the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microemulsion; Amazon; Native fruit; Nanotechnology; Carriers.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000300246

Chisel Plough Shares Protection by Using Two Different Coating Techniques
Provedor de dados: 111
Autores: Hegazy, Rashad Aziz; El-Sheikha, Ahmed mohamed.
Hydrophobic coating with ceramic, as nanotechnology, is widely used to protect metal in different industries, but it has not yet tested with agricultural tools. Nickel chrome plating is defined and used process to protect metals too, but it has a common use. So, this work discusses the effect of two types of coating techniques on wear reduction on normal chisel plough shares. First coating technique was using nanotechnology inform of SI14-200 micron (0.2 mm) high density hydrophobic and ceramic coating. Second coating technique was using the galvanizing process by treating the shares with nickel chrome plating. Both techniques were applied for chisels’ shares made from medium carbon steel C-45. All treated shares were operated for 40, 80 and 120 hours to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nanotechnology; Hydrophobic coating; Nickel chrome plating; Wear characteristics; Farm machinery.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6883

Production, characterization and toxicology assay of creatine pegylated nanoliposome with polysorbate 80 for brain delivery
Provedor de dados: 42
Autores: BORIN,DIEGO B.; MEZZOMO,NATHANA J.; VAUCHER,RODRIGO A.; CARMO,GUILHERME DO; RODRIGUES JUNIOR,LUIZ C.; SULCZEWSKI,FERNANDO B.; SCHWERTZ,CLAITON I.; MENDES,RICARDO E.; DAMIANI,ADRIANI P.; ANDRADE,VANESSA M. DE; RECH,VIRGÍNIA C.; BOECK,CARINA R.
ABSTRACT Creatine acts intracellularly as energy buffer and storage, demonstrating protective effects in animal models of neurodegenerative diseases. However, its permeability throught blood-brain barrier (BBB) is reduced. The aim of the present study was developing a carrier to facilitate the delivery of creatine to the central nervous system. Creatine nanoliposomes were produced, characterized and assayed in models of toxicity in vitro and in vivo. Particles showed negative zeta potential (-12,5 mV), polydispersity index 0.237 and medium-size of 105 nm, which was confirmed by transmission electron microscopy (TEM) images. Toxicity assay in vitro was evaluated with blank liposomes (no drug) or creatine nanoliposomes at concentrations of 0.02 and 0.2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nanocarrier; Neurodegenerative diseases; Nanotechnology; Liposomes.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502317

Nanoparticle-based therapy for respiratory diseases
Provedor de dados: 42
Autores: SILVA,ADRIANA L. DA; SANTOS,RAQUEL S.; XISTO,DÉBORA G.; ALONSO,SILVIA DEL V.; MORALES,MARCELO M.; ROCCO,PATRICIA R.M.
Nanotechnology is an emerging science with the potential to create new materials and strategies involving manipulation of matter at the nanometer scale (&lt;100 nm). With size-dependent properties, nanoparticles have introduced a new paradigm in pharmacotherapy – the possibility of cell-targeted drug delivery with minimal systemic side effects and toxicity. The present review provides a summary of published findings, especially regarding to nanoparticle formulations for lung diseases. The available data have shown some benefits with nanoparticle-based therapy in the development of the disease and lung remodeling in respiratory diseases. However, there is a wide gap between the concepts of nanomedicine and the published experimental data and clinical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asthma; Turberculosis; Nanotechnology; Lung cancer.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100137

Nanoencapsulated Melaleuca alternifolia essential oil exerts anesthetic effects in the brachyuran crab using Neohelice granulate
Provedor de dados: 42
Autores: SOUZA,CARINE F.; LIMA,TÁBATA; BALDISSERA,MATHEUS D.; GEIHS,MÁRCIO A.; MACIEL,FÁBIO E.; NERY,LUIZ E.M.; SANTOS,ROBERTO C.V.; RAFFIN,RENATA P.; HEINZMANN,BERTA M.; CARON,BRAULIO O.; BALDISSEROTTO,BERNARDO.
ABSTRACT The aim of this study was to evaluate the efficacy and safety of several anesthetics in the brachyuran crab Neohelice granulata, an emergent experimental model. The essential oils (EOs) of Lippia alba, Aloysia tryphilla, and Melaleuca alternifolia (tea tree oil; TTO), the isolated compounds eugenol, menthol, terpinen-4-ol, and the nanoencapsulated form of TTO, were administered in one or more of the following ways: added to the water (immersion), through an arthrodial membrane (injected), or by oral gavage. Unexpectedly, most EOs did not produce an anesthetic effect after immersion. Only TTO and eugenol induced anesthesia by immersion, with very long induction and recovery times compared to anesthesia of other crustaceans. However, a good...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anesthesia; Eugenol; Terpinen-4-ol; Nanotechnology; Invertebrate; Tea-tree-oil.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602855

In vivo biocompatibility of nanostructured Chitosan/Peo membranes
Provedor de dados: 45
Autores: 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

Biodistribution of free 99mTc-ovalbumin and 99mTc-ovalbumin encapsulated in liposomes
Provedor de dados: 52
Autores: 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

Cytotoxic Effect on Cancerous Cell Lines by Biologically Synthesized Silver Nanoparticles
Provedor de dados: 52
Autores: Kulandaivelu,Balaji; Gothandam,K M.
The biosynthesis of nanoparticles has been proposed as an environmental friendly and cost effective alternative to chemical and physical methods. Silver nanoparticles are biologically synthesized and characterized were used in the study. The invitro cytotoxic effect of biologically synthesized silver nanoparticles against MCF-7 cancer cell lines were assessed. The cytotoxic effects of the silver nanoparticles could significantly inhibited MCF-7 cancer cell lines proliferation in a time and concentration-dependent manner by MTT assay. Acridine orange, ethidium bromide (AO/EB) dual staining, caspase-3 and DNA fragmentation assays were carried out using various concentrations of silver nanoparticles ranging from 1 to 100 μg/mL. At 100 μg/mL concentration, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Silver nanoparticle; Nanotechnology; Nanobiotechnology; Nanoparticle; Cytotoxicity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100307

Viability of mesenchymal stem cells during electrospinning
Provedor de dados: 56
Autores: Zanatta,G.; Steffens,D.; Braghirolli,D.I.; Fernandes,R.A.; Netto,C.A.; Pranke,P.
Tissue engineering is a technique by which a live tissue can be re-constructed and one of its main goals is to associate cells with biomaterials. Electrospinning is a technique that facilitates the production of nanofibers and is commonly used to develop fibrous scaffolds to be used in tissue engineering. In the present study, a different approach for cell incorporation into fibrous scaffolds was tested. Mesenchymal stem cells were extracted from the wall of the umbilical cord and mononuclear cells from umbilical cord blood. Cells were re-suspended in a 10% polyvinyl alcohol solution and subjected to electrospinning for 30 min under a voltage of 21 kV. Cell viability was assessed before and after the procedure by exclusion of dead cells using trypan blue...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nanotechnology; Tissue engineering; Electrospinning; Stem cells.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000200006

Evaluation of cardiovascular toxicity of carbon nanotubes functionalized with sodium hyaluronate in oral regenerative medicine
Provedor de dados: 56
Autores: 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...
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

Single-walled carbon nanotubes functionalized with sodium hyaluronate enhance bone mineralization
Provedor de dados: 56
Autores: Sá,M.A.; Ribeiro,H.J.; Valverde,T.M.; Sousa,B.R.; Martins-Júnior,P.A.; Mendes,R.M.; Ladeira,L.O.; Resende,R.R.; Kitten,G.T.; Ferreira,A.J.
The aim of this study was to evaluate the effects of sodium hyaluronate (HY), single-walled carbon nanotubes (SWCNTs) and HY-functionalized SWCNTs (HY-SWCNTs) on the behavior of primary osteoblasts, as well as to investigate the deposition of inorganic crystals on titanium surfaces coated with these biocomposites. Primary osteoblasts were obtained from the calvarial bones of male newborn Wistar rats (5 rats for each cell extraction). We assessed cell viability using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide assay and by double-staining with propidium iodide and Hoechst. We also assessed the formation of mineralized bone nodules by von Kossa staining, the mRNA expression of bone repair proteins, and the deposition of inorganic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Osteoblast; Nanotechnology; Carbon nanotubes; Sodium hyaluronate; Tissue engineering; Osseointegration.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000200602

Developments in the use of nanocapsules in oncology
Provedor de dados: 56
Autores: 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

Development and characterization of hyaluronic acid-lysine nanoparticles with potential as innovative dermal filling
Provedor de dados: 60
Autores: Carneiro,Jaqueline; Döll-Boscardin,Patrícia Mathias; Fiorin,Bárbara Celânia; Nadal,Jessica Mendes; Farago,Paulo Vitor; Paula,Josiane Padilha de.
ABSTRACT Skin aging causes changes such as wrinkles and flaccidity leading to a large demand for aesthetic procedures, including dermal filling. A key agent in dermal filling is hyaluronic acid (HA), which is a naturally occurring glycosaminoglycan. However, it is a hydrophilic macromolecule that experiences great difficulty in crossing the skin barrier causing most commercial formulations containing it to be injectable, which in turn brings risks since they involve an invasive technique. In that sense, the aim of this study was to develop and characterize nanoparticles obtained from ionic interaction between HA and lysine (Lys) for use as a potential agent of dermal filling for topical application, increasing and improving its applicability and safety. To...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nanotechnology; Skin aging/non-invasive method; Skin aging/treatment/study.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502016000400645

A review of nanotechnology with an emphasis on Nanoplex
Provedor de dados: 60
Autores: Kadam,Rupali Nanasaheb; Shendge,Raosaheb Sopanrao; Pande,Vishal Vijay.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nanotechnology; Nanoplex/formulation; Nanoplex/characterization; Nanoplex/applications.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502015000200255

Phenobarbital loaded microemulsion: development, kinetic release and quality control
Provedor de dados: 60
Autores: Figueiredo,Kayo Alves; Neves,Jamilly Kelly Oliveira; Silva,José Alexsandro da; Freitas,Rivelilson Mendes de; Carvalho,André Luis Menezes.
ABSTRACT This study aimed to obtain and characterize a microemulsion (ME) containing phenobarbital (PB). The PB was incorporated in the proportion of 5% and 10% in a microemulsion system containing Labrasol(r), ethanol, isopropyl myristate and purified water. The physicochemical characterization was performed and the primary stability of the ME was evaluated. An analytical method was developed using spectrophotometry in UV  = 242 nm. The kinetics of the in vitro release (Franz model) of the ME and the emulsion (EM) containing PB was evaluated. The incorporation of PB into ME at concentrations of 5 and 10% did not change pH and resistance to centrifugation. There was an increase in particle size, a decrease of conductivity and a change in the refractive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microemulsion/physicochemical characterization; Microemulsion/In vitro release; Phenobarbital/microemulsion system/evaluation; Nanotechnology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502016000200251

Preferences for sunflower oil produced conventionally, produced with nanotechnology or genetically modified in the Araucanía Region of Chile
Provedor de dados: 118
Autores: 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