Papers by ADALBERTO ZAMUDIO OJEDA
Cyta-journal of Food, Dec 6, 2023
Journal of Clinical Medicine
Nanotechnology has emerged as a promising technology in the field of hepatocellular carcinoma (HC... more Nanotechnology has emerged as a promising technology in the field of hepatocellular carcinoma (HCC), specifically in the implementation of diagnosis and treatment strategies. Nanotechnology-based approaches, such as nanoparticle-based contrast agents and nanoscale imaging techniques, have shown great potential for enhancing the sensitivity and specificity of HCC detection. These approaches provide high-resolution imaging and allow for the detection of molecular markers and alterations in cellular morphology associated with HCC. In terms of treatment, nanotechnology has revolutionized HCC therapy by enabling targeted drug delivery, enhancing therapeutic efficacy, and minimizing off-target effects. Nanoparticle-based drug carriers can be functionalized with ligands specific to HCC cells, allowing for selective accumulation of therapeutic agents at the tumor site. Furthermore, nanotechnology can facilitate combination therapy by co-encapsulating multiple drugs within a single nanoparti...
Journal of Nanobiotechnology
Background In recent years, crop production has expanded due to the variety of commercially avail... more Background In recent years, crop production has expanded due to the variety of commercially available species. This increase in production has led to global competition and the search for biostimulant products that improve crop quality and yield. At the same time, agricultural products that protect against diseases caused by phytopathogenic microorganisms are needed. Thus, the green synthesis of selenium nanoparticles (SeNPs) is a proposal for achieving these needs. In this research, SeNPs were synthesized from methanolic extract of Amphipterygium glaucum leaves, and chemically and biologically characterized. Results The characterization of SeNPs was conducted by ultraviolet–visible spectrophotometry (UV–Vis), scanning electron microscopy (SEM), electron microscopy transmission (TEM), Dynamic Light Scattering (DLS), energy dispersion X-ray spectroscopy (EDX), and infrared spectrophotometry (FTIR) techniques. SeNPs with an average size of 40–60 nm and spherical and needle-shaped morp...
Nanomaterials
The modifications of the electronic properties on carbon-doped boron nitride nanoribbons (BNNRs) ... more The modifications of the electronic properties on carbon-doped boron nitride nanoribbons (BNNRs) as a response to the adsorption of different nitro species were investigated in the framework of the density functional theory within the generalized gradient approximation. Calculations were performed using the SIESTA code. We found that the main response involved tuning the original magnetic behavior to a non-magnetic system when the molecule was chemisorbed on the carbon-doped BNNR. It was also revealed that some species could be dissociated through the adsorption process. Furthermore, the nitro species preferred to interact over nanosurfaces where dopants substituted the B sublattice of the carbon-doped BNNRs. Most importantly, the switch on the magnetic behavior offers the opportunity to apply these systems to fit novel technological applications.
Ciencia Latina Revista Científica Multidisciplinar
La resistencia a antimicrobianos es un problema creciente de salud pública mundial, pues cada vez... more La resistencia a antimicrobianos es un problema creciente de salud pública mundial, pues cada vez hay más microorganismos patógenos resistentes a los agentes antimicrobianos tradicionales. Esto ha originado una creciente necesidad por investigar y desarrollar nuevas terapias para combatir a estas cepas resistentes. Las nanopartículas de quitosano se han convertido en una alternativa atractiva y prometedora para solucionar este problema, pues ya se ha demostrado su actividad contra bacterias multirresistentes. Además, como sistemas acarreadores de agentes antimicrobianos para liberación controlada, han demostrado ser una alternativa adecuada a la administración convencional de fármacos. Por tanto, en el presente artículo se resumirá brevemente el estado actual de la investigación en nanopartículas de quitosano aplicada en combatir la resistencia a antimicrobianos.
Ciencia Latina Revista Científica Multidisciplinar
La nanotecnología es una disciplina que consiste en manipular la materia, átomo por átomo, los ma... more La nanotecnología es una disciplina que consiste en manipular la materia, átomo por átomo, los materiales de estudio tienen una escala menor a 100 nm, los cuales pueden originarse de manera de forma natural o mediante la intervención del hombre por medio de una gran cantidad de métodos y estos pueden adquirir diferentes propiedades dependiendo de la materia de las que tengan origen. En las ciencias veterinarias, tanto la medicina, como la producción pecuaria, así como la salud pública, estas tecnologías representan un avance histórico e innovador que permite tratar diferentes enfermedades infecciosas y degenerativas, mejorar la crianza y la reproducción de los animales, así como la vigilancia de la inocuidad en los alimentos de origen animal. Sin embargo, aún existe poca investigación al respecto, por lo que este artículo tiene como finalidad brindar un panorama de los alcances y limitaciones que estás nuevas técnicas nos pueden proporcionar
Silver nanoparticles (AgNP's) have been immobilized onto silica spheres through the adsorptio... more Silver nanoparticles (AgNP's) have been immobilized onto silica spheres through the adsorption and subsequent reduction of Ag+ ions on the surface by trisodium citrate. The SiO2-Ag-0 spheres were characterized by high resolution transmission electron microscopy (HRTEM), UV-Vis diffuse reflectance (DRS), and Fourier Transform Infrared Spectroscopy (FT-IR). Posterior antibacterial tests of the SiO2-Ag-0 spheres were done on Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 10536); which showed good performance.
Tesis (Doctorado en Nanociencias y Nanotecnología)"En este trabajo se describen tres métodos... more Tesis (Doctorado en Nanociencias y Nanotecnología)"En este trabajo se describen tres métodos sencillos y eficientes de anclaje de nanopartículas de plata en la superficie de nanotubos de carbono de pared múltiple dopados con nitrógeno. La importancia de los métodos desarrollados en este trabajo radica en la ausencia de tratamientos agresivos a la superficie de los nanotubos (tratamientos de oxidación). Los diferentes métodos de anclaje incluyen la reducción de las nanopartículas en presencia de los nanotubos. El procedimiento más prometedor se encuentra basado en la mezcla de suspensiones de nanotubos dopados con cúmulos de plata presintetizados. La caracterización de estas muestras incluyó microscopía electrónica de transmisión de alta resolución (HRTEM), microscopía electrónica de barrido (SEM) y difracción de rayos X. Además, se propone un posible mecanismo de anclaje de los cúmulos con la superficie de los tubos dopados, en el cual, la molécula del solvente empleado (Dimeti...
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
In this work, we report the use of caffeine as an alternative source of nitrogen to successfully ... more In this work, we report the use of caffeine as an alternative source of nitrogen to successfully dope graphene (quaternary 400.6 eV and pyridinic at 398 eV according XPS), as well as the growth of silver nanowires (in-situ) in the surface of nitrogen doped graphene (NG) sheets. We used the improved graphene oxide method (IGO), chemical reduction of graphene oxide (GOx), and impregnation with caffeine as source of nitrogen for doping and subsequently, silver nanowires (NW) grow in the surface by the reduction of silver salts in the presence of NG, achieving a numerous of growth of NW in the graphene sheets. As supporting experimental evidence, the samples were analyzed using conventional characterization techniques: SEM-EDX, XRD, FT-IR, micro RAMAN, TEM, and XPS.
In this study, the effects of different concentrations of vanadium (V), selenium (Se), cerium (Ce... more In this study, the effects of different concentrations of vanadium (V), selenium (Se), cerium (Ce), and iodine (I) on the growth parameters, biomass accumulation, and content of photosynthetic pigments during the seedling stage of marigold (Calendula officinalis L.) were evaluated. The beneficial elements V (3, 5, or 10 μM), Se (5, 10, or 20 μM), Ce (25, 50, or 100 μM), and I (5 or 10 μM) were applied once a week along with 50% Hoagland nutritive solution. Four applications were applied to the roots. Doses of 5 μM V and 50 μM Ce improved plant height, while 5 μM I promoted root growth. Leaf area and number of leaves increased with the application of 20 μM Se and 5 μM I, respectively. High concentrations of Se and Ce improved leaf dry weight, while 10 μM V increased the photosynthetic pigment content. The application of these elements contributed to the development and production of marigold seedlings during nursery growth. Additional key words: cerium, iodine, marigold, selenite, va...
Uploads
Papers by ADALBERTO ZAMUDIO OJEDA