|
|
|
| Registros recuperados: 31 | |
|
|
| Romero Pérez, Atmir. |
| El selenito de sodio, el suplemento de selenio mas usado en rumiantes en la prevención de la deficiencia del elemento y las enfermedades resultantes, fue encapsulado por nanoprecipitación y emulsión-evaporación en nanopartículas poliméricas. Fue evaluado el efecto del método de preparación de nanoparticulas, proporciones de polímeros (Eudragit RL 100 y RS 100) y solvente empleado (etanol y acetona), sobre las características fisicoquímicas (potencial z, índice de polidispersidad y porcentaje de encapsulación) y la morfología (tamaño de partícula y forma) de las nanopartículas. El tamaño de partícula obtenido presentó valores de 34.64 a 213.86 nm. Tanto el tamaño como el potencial z y el PDI se incrementaron (P < 0.05) cuando se utilizó el... |
| Tipo: Tesis |
Palavras-chave: Nanopartículas; Selenito de sodio; Eudragit; Rumiantes; Maestría; Ganadería; Nanoparticles; Sodium selenite; Eudragit; Ruminants. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1515 |
| |
|
|
| Xiao,Anfeng; Xu,Caiyun; Lin,Yan; Ni,Hui; Zhu,Yanbing; Cai,Huinong. |
| Background Carboxyl-functionalized magnetic nanoparticles were synthesized via chemical co-precipitation method and modified with oleic acid which was oxidized by potassium permanganate, and κ-carrageenase from Pseudoalteromonas sp. ASY5 was subsequently immobilized onto them. The immobilization conditions were further optimized, and the characterizations of the immobilized κ-carrageenase were investigated. Results The κ-carrageenase was immobilized onto magnetic iron oxide nanoparticles, and the bonding was verified by Fourier transform infrared spectroscopy. The optimal conditions for κ-carrageenase immobilization were 2.5% (w/v) glutaraldehyde, 13.9 U κ-carrageenase for 20 mg of magnetic nanoparticles, a 2-h... |
| Tipo: Journal article |
Palavras-chave: Carrageenase; Characterization; Immobilization; Nanoparticles. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000100001 |
| |
|
|
| SILVA NETO, R. M. da; MAIA, C. W. C. P.; ROSA, M. de F.. |
| A celulose é uma das principais moléculas naturais utilizadas e tem sido tradicionalmente usada para fabricação de papel, além de outras aplicações. Algumas bactérias, em especial as do gênero Komagataeibacter, são capazes de produzir um biopolímero com estrutura química similar à celulose vegetal, denominado celulose bacteriana (CB). Dessa forma, podem, em determinadas aplicações, ser uma fonte alternativa à celulose vegetal, a qual é mundialmente utilizada pelas indústrias de um modo geral. A celulose vegetal e a CB apresentam a mesma estrutura molecular, mas a segunda tem vantagens competitivas, incluindo uma estrutura em rede naturalmente nanométrica, que atraíram atenção para sua produção. Em comparação com a celulose vegetal, a CB apresenta... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Celulose bacteriana; Nanopartículas; Melaço de soja; Soy molasses; Bacterial cellulose; Nanoparticles. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1130078 |
| |
|
| |
|
| |
|
|
| Volpedo,Greta; Costa,Lourena; Ryan,Nathan; Halsey,Gregory; Satoskar,Abhay; Oghumu,Steve. |
| Abstract Neglected Tropical Diseases (NTDs) comprise of a group of seventeen infectious conditions endemic in many developing countries. Among these diseases are three of protozoan origin, namely leishmaniasis, Chagas disease, and African trypanosomiasis, caused by the parasites Leishmania spp., Trypanosoma cruzi, and Trypanosoma brucei respectively. These diseases have their own unique challenges which are associated with the development of effective prevention and treatment methods. Collectively, these parasitic diseases cause more deaths worldwide than all other NTDs combined. Moreover, many current therapies for these diseases are limited in their efficacy, possessing harmful or potentially fatal side effects at therapeutic doses. It is therefore... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leishmaniasis; Chagas; Trypanosomiasis; Nanoparticles; Liposomes; Nanotubes; Nanodiscs; Micelles. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992019000100201 |
| |
|
|
| Becker-Ritt,Arlete Beatriz; Portugal,Camila Saretta; Carlini,Célia Regina. |
| Abstract Urease from Canavalia ensiformis seeds was the first enzyme ever to be crystallized, in 1926. These proteins, found in plants, bacteria and fungi, present different biological properties including catalytic hydrolysis of urea, and also enzyme-independent activities, such as induction of exocytosis, pro-inflammatory effects, neurotoxicity, antifungal and insecticidal properties. Urease is toxic to insects and fungi per se but part of this toxicity relies on an internal peptide (~11 kDa), which is released upon digestion of the protein by insect enzymes. A recombinant form of this peptide, called jaburetox (JBTX), was constructed using jburell gene as a template. The peptide exhibits liposome disruption properties, and insecticidal and fungicidal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Peptide; Bacteria; Membranes; Nanoparticles. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100211 |
| |
|
|
| 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 |
| |
|
| |
|
|
| shaker, ahmed mahmoud. |
| The Egyptian cotton leaf worm, Spodoptera littoralis (Boisd.) (Noctuidae: Lepidoptera) is an economically important pest with a wide range of host plants. It attacks certain vegetable and field crops such as cotton, tomatoes, cabbage and squash in Egypt, for causing severe injuries to the plants in all phonological crop stages, In addition to this species has acquired resistance to many insecticides. The overall objective of this investigations was to look for new control strategy through evaluate the effects of application of TiO2 nanoparticles on the survival and biology of this insect. The experiment were carried out under laboratory conditions, the experiment was achieved with two treatments, consisting of TiO2 nanoparticles application, and a negative... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: TiO2; Nanoparticles; Cotton; Leaf worm; Nanopesticide; Agriculture. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4390 |
| |
|
|
| RIBEIRO,ANA F.; SANTOS,JULIANA F.; MATTOS,RÔMULO R.; BARROS,ELIANE G.O.; NASCIUTTI,LUIZ EURICO; CABRAL,LÚCIO M.; SOUSA,VALERIA P. DE. |
| Abstract Uncaria tomentosa (UT) extracts have been shown to have promising anti-tumor activity. We hypothesized that its incorporation into nanostructured systems could improve the anticancer properties. Here, poly-e-caprolactone (PCL) and poly-d,l-lactide-co-glycolide (PLGA) were employed to generate nanoparticles loaded with UT extract in a single emulsion solvent evaporation method. The nanoparticles were characterized by particle size, zeta potential, morphology and entrapment efficiency along with stability and release profiles. The nanoparticles presented entrapment efficiencies above 60% and a mean diameter below 300nm. UT-PCL nanoparticles presented higher entrapment efficiency and mean particle size as well as a slow release rate. The UT-PLGA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanoparticles; Prostate cancer; PLGA; PCL; Anti-tumor; Anti-cancer; Cat’s Claw. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100908 |
| |
|
|
| VARANDA,LAUDEMIR C.; SOUZA,CAIO G.S.; MORAES,DANIEL A.; NEVES,HERBERT R.; SOUZA JUNIOR,JOÃO B.; SILVA,MONICA F.; BINI,RAFAEL A.; ALBERS,REBECCA F.; SILVA,TIAGO L.; BECK JUNIOR,WATSON. |
| Abstract: Since its inception in 2007, the Colloidal Materials Group, one of the research groups in nanotechnology of the Institute of Chemistry of São Carlos (IQSC) at University of São Paulo (USP) carries out studies related to the development of syntheses methods of nanoparticles and multifunctional nanostructured systems. Our works search new synthesis methodologies that allow high size and shape control of the individual nanoparticles or that compose the nanostructured systems and has as a principle the synthetic approaches based on the modified polyol and thermal decomposition processes. Systems involving nanoparticles have received extensive attention both in the fundamental research and in several technological applications exploring the unique... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanoparticles; Nanostructured composites; Modified polyol process; Thermal decomposition method; Size and shape control; Colloidal Materials Group.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700406 |
| |
|
|
| IANISKI,FRANCINE R.; RECH,VIRGINIA C.; NISHIHIRA,VIVIAN S.K.; ALVES,CATIANE B.; BALDISSERA,MATHEUS D.; WILHELM,ETHEL A.; LUCHESE,CRISTIANE. |
| ABSTRACT Considering that Alzheimer's disease is a prevalent neurodegenerative disease worldwide, we investigated the activities of three key kinases: creatine kinase, pyruvate kinase and adenylate kinase in the hippocampus and cerebral cortex in Alzheimer's disease model. Male adult Swiss mice received amyloid-β or saline. One day after, mice were treated with blank nanocapsules (17 ml/kg) or meloxicam-loaded nanocapsules (5 mg/kg) or free meloxicam (5 mg/kg). Treatments were performed on alternating days, until the end of the experimental protocol. In the fourteenth day, kinases activities were performed. Amyloid-β did not change the kinases activity in the hippocampus and cerebral cortex of mice. However, free meloxicam decrease the creatine kinase... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alzheimer's disease; Nanoparticles; Meloxicam; Energetic metabolism; Phosphoryltransfer network. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501829 |
| |
|
|
| CASTRO,RICARDO I.; FORERO-DORIA,OSCAR; GUZMÁN,LUIS. |
| Abstract Currently, cancer is the second most common cause of death in the United States, exceeded only by heart disease. Chemotherapy traditionally suffers from a non-specific distribution, with only a small fraction of the drug reaching the tumor, in this sense, the use of dendrimers incorporating drugs non-covalently encapsulated inside the dendrimer or covalently conjugated have proven to be effectives against different cancer cell lines. However, at present the dendrimers used as drug-carriers still do not meet the necessary characteristic to be considered as an ideal dendrimer for drug delivery; high toxicity, bio-degradability, low toxicity, biodistribution characteristics, and favorable retention with appropriate specificity and bioavailability... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dendrimers; Cancer therapy; Pharmacodynamics; Nanoparticles. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502331 |
| |
|
| |
|
|
| Rivas-Aravena,Andrea; Sandino,Ana María; Spencer,Eugenio. |
| Aquaculture has become an important economic sector worldwide, but is faced with an ongoing threat from infectious diseases. Vaccination plays a critical role in protecting commercially raised fish from bacterial, viral and parasitic diseases. However, the production of effective vaccines is limited by the scarcity of knowledge about the immune system of fish. Improving vaccines implies using antigens, adjuvants and employing methods of administration that are more effective and less harmful to the fish. In this context, in recent year there have studies of methods of encapsulating antigens in matrices of different types to apply in fish vaccines. This work reviews the new methods to improve fish vaccines by encapsulating them in polymers and... |
| Tipo: Journal article |
Palavras-chave: Nanoparticles; Vaccine; Aquaculture. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000400012 |
| |
|
|
| Margabandhu,M.; Sendhilnathan,S.; Senthilkumar,S.; Gajalakshmi,D.. |
| ABSTRACT In the present work, Cu2+ substituted cobalt ferrite (Co1-xCuxFe2O4, x = 0, 0.3, 0.5, 0.7 and 1) magnetic nanopowders were synthesized via chemical co-precipitation method. The prepared powders were investigated by various characterization methods such as X-ray diffraction analysis (XRD), scanning electron microscope analysis (SEM), vibrating sample magnetometer analysis (VSM) and fourier transform infrared spectroscopy analysis (FTIR). The XRD analysis reveals that the synthesized nanopowders possess single phase centred cubic spinel structure. The average crystallite size of the particles ranging from 27-49 nm was calculated by using Debye-scherrer formula. Magnetic properties of the synthesized magnetic nanoparticles are studied by using VSM.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanoparticles; Co-precipitation; Cubic spinel; Morphology; Anti-bacterial activity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000300401 |
| |
|
| |
|
|
| Roy,René; Shiao,Tze Chieh; Rittenhouse-Olson,Kate. |
| Combining nanotechnology with glycobiology has triggered an exponential growth of research activities in the design of novel functional bionanomaterials (glyconanotechnology). More specifically, recent synthetic advances towards the tailored and versatile design of glycosylated nanoparticles namely glyconanoparticles, considered as synthetic mimetics of natural glycoconjugates, paved the way toward diverse biomedical applications. The accessibility of a wide variety of these structured nanosystems, in terms of shapes, sizes, and organized around stable nanoparticles have readily contributed to their development and applications in nanomedicine. In this context, glycosylated gold-nanoparticles (GNPs), glycosylated quantum dots (QDs), fullerenes, single-wall... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dendrimer; Glycodendrimer; Vaccine; Bacteria; Nanoparticles; E. coli; Lanthanides. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000700008 |
| |
|
|
| Pedrozo,Regiellen Cristina; Antônio,Emilli; Khalil,Najeh Maissar; Mainardes,Rubiana Mara. |
| Rutin is a flavonoid compound obtained from different vegetables and fruits; specifically, it is found in the seeds of buckwheat and in fruit peels, particularly citrus. It is also an important constituent of red wine. Rutin exhibits various biological properties including antiviral, vasoprotective, anti-inflammatory, and anticarcinogenic activities. However, its antioxidant activity is the most well studied. Despite the potential for in vitro applications, rutin presents low oral bioavailability that affects its biological activities. Nanoparticles composed of polymers, protein, or lipids are of great importance in the pharmaceutical and nutraceutical areas due to their physicochemical properties, which improve the pharmacokinetics of the drug which is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nano spray drying; Rutin; Nanoparticles; Bovine serum albumin; Antioxidant. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100512 |
| |
| Registros recuperados: 31 | |
|
|
|
