Leonardo Barrios
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View article: DNA shuffling to improve crude-water interfacial activity in biosurfactants with OmpA protein of <i>Escherichia coli</i>
DNA shuffling to improve crude-water interfacial activity in biosurfactants with OmpA protein of <i>Escherichia coli</i> Open
Surfactants are molecules derived primarily from petroleum that can reduce the surface tension at interfaces. Their slow degradation is a characteristic that could cause environmental issues. This and other factors contribute to the allure…
View article: Biodose Tools: an R shiny application for biological dosimetry
Biodose Tools: an R shiny application for biological dosimetry Open
In the event of a radiological accident or incident, the aim of biological dosimetry is to convert the yield of a specific biomarker of exposure to ionizing radiation into an absorbed dose. Since the 1980s, various tools have been used to …
View article: Biodose Tools: An R shiny Application for Biological Dosimetry
Biodose Tools: An R shiny Application for Biological Dosimetry Open
Introduction In the event of a radiological accident or incident, the aim of biological dosimetry is to convert the yield of a specific biomarker of exposure to ionizing radiation into an absorbed dose. Since the 1980s, various tool…
View article: Biodose Tools: an R shiny application for biological dosimetry
Biodose Tools: an R shiny application for biological dosimetry Open
In the event of a radiological accident or incident, the aim of biological dosimetry is to convert the yield of a specific biomarker of exposure to ionizing radiation into an absorbed dose. Since the 1980s, various tools have been used to …
View article: Differential Radiosensitizing Effect of 50 nm Gold Nanoparticles in Two Cancer Cell Lines
Differential Radiosensitizing Effect of 50 nm Gold Nanoparticles in Two Cancer Cell Lines Open
Radiation therapy is widely used as an anti-neoplastic treatment despite the adverse effects it can cause in non-tumoral tissues. Radiosensitizing agents, which can increase the effect of radiation in tumor cells, such as gold nanoparticle…
View article: The Slashed Power Half-Normal Distribution with Applications
The Slashed Power Half-Normal Distribution with Applications Open
In this paper, an extension of the power half-normal (PHN) distribution is introduced. This new model is built on the application of slash methodology for positive random variables. The result is a distribution with greater kurtosis than t…
View article: Imaging luminescent tattoo inks for direct visualization of linac and cobalt irradiation
Imaging luminescent tattoo inks for direct visualization of linac and cobalt irradiation Open
Purpose Tattoo fiducials are commonly used in radiotherapy patient alignment, and recent studies have examined the use of UV‐excited luminescent tattoo ink as a cosmetic substitute to make these visible under UV illumination. The goal of t…
View article: Cell Internalization in Fluidic Culture Conditions Is Improved When Microparticles Are Specifically Targeted to the Human Epidermal Growth Factor Receptor 2 (HER2)
Cell Internalization in Fluidic Culture Conditions Is Improved When Microparticles Are Specifically Targeted to the Human Epidermal Growth Factor Receptor 2 (HER2) Open
Purpose: To determine if the specific targeting of microparticles improves their internalization by cells under fluidic conditions. Methods: Two isogenic breast epithelial cell lines, one overexpressing the Human Epidermal Growth Factor Re…
View article: Permanently hydrophilic, piezoelectric PVDF nanofibrous scaffolds promoting unaided electromechanical stimulation on osteoblasts
Permanently hydrophilic, piezoelectric PVDF nanofibrous scaffolds promoting unaided electromechanical stimulation on osteoblasts Open
Electrospinning and plasma post-modification lead to PVDF scaffolds with favorable electromechanical properties and enhanced wettability.
View article: Membrane reorganization after photochemical internalization to release transferrin-biofunctionalized polystyrene microparticles
Membrane reorganization after photochemical internalization to release transferrin-biofunctionalized polystyrene microparticles Open
View article: Amphiphilic gemini pyridinium-mediated incorporation of Zn(II)meso-tetrakis(4-carboxyphenyl)porphyrin into water-soluble gold nanoparticles for photodynamic therapy
Amphiphilic gemini pyridinium-mediated incorporation of Zn(II)meso-tetrakis(4-carboxyphenyl)porphyrin into water-soluble gold nanoparticles for photodynamic therapy Open
View article: Mechanical properties, corrosion performance and cell viability studies on newly developed porous Fe-Mn-Si-Pd alloys
Mechanical properties, corrosion performance and cell viability studies on newly developed porous Fe-Mn-Si-Pd alloys Open
View article: Biodegradable FeMnSi Sputter-Coated Macroporous Polypropylene Membranes for the Sustained Release of Drugs
Biodegradable FeMnSi Sputter-Coated Macroporous Polypropylene Membranes for the Sustained Release of Drugs Open
Pure Fe and FeMnSi thin films were sputtered on macroporous polypropylene (PP) membranes with the aim to obtain biocompatible, biodegradable and, eventually, magnetically-steerable platforms. Room-temperature ferromagnetic response was obs…
View article: Bioelectronics: Electromechanical Nanogenerator–Cell Interaction Modulates Cell Activity (Adv. Mater. 24/2017)
Bioelectronics: Electromechanical Nanogenerator–Cell Interaction Modulates Cell Activity (Adv. Mater. 24/2017) Open
Saos-2 cells are cultured on top of piezoelectric nanogenerators (NGs) based on ZnO nanosheets for electrical self-stimulation by Gonzalo Murillo, Carme Nogués, and co-workers in article number 1605048. Imaging by scanning electron microsc…
View article: Electromechanical Nanogenerator–Cell Interaction Modulates Cell Activity
Electromechanical Nanogenerator–Cell Interaction Modulates Cell Activity Open
Noninvasive methods for in situ electrical stimulation of human cells open new frontiers to future bioelectronic therapies, where controlled electrical impulses could replace the use of chemical drugs for disease treatment. Here, this stud…
View article: Cytocompatibility assessment of Ti‐Zr‐Pd‐Si‐(Nb) alloys with low Young's modulus, increased hardness, and enhanced osteoblast differentiation for biomedical applications
Cytocompatibility assessment of Ti‐Zr‐Pd‐Si‐(Nb) alloys with low Young's modulus, increased hardness, and enhanced osteoblast differentiation for biomedical applications Open
Ti‐based alloys have increased importance for biomedical applications due to their excellent properties. In particular, the two recently developed TiZrPdSi(Nb) alloys, with a predominant β‐Ti phase microstructure, have good mechanical prop…
View article: Cell Death Mechanisms in Tumoral and Non-Tumoral Human Cell Lines Triggered by Photodynamic Treatments: Apoptosis, Necrosis and Parthanatos
Cell Death Mechanisms in Tumoral and Non-Tumoral Human Cell Lines Triggered by Photodynamic Treatments: Apoptosis, Necrosis and Parthanatos Open
Cell death triggered by photodynamic therapy can occur through different mechanisms: apoptosis, necrosis or autophagy. However, recent studies have demonstrated the existence of other mechanisms with characteristics of both necrosis and ap…
View article: The RENEB operational basis: complement of established biodosimetric assays
The RENEB operational basis: complement of established biodosimetric assays Open
The RENEB network is fully operational and ready to act in case of a major radiation emergency. Moreover, the high capacity for analyzing radiation-induced damage in cells and personal electronic devices makes the network suitable for larg…
View article: RENEB intercomparisons applying the conventional Dicentric Chromosome Assay (DCA)
RENEB intercomparisons applying the conventional Dicentric Chromosome Assay (DCA) Open
In case of a large-scale radiological incident, the pooling of ressources by networks can enhance the rapid classification of individuals in medically relevant treatment groups based on the DCA. The performance of the RENEB network as a wh…
View article: Investigation of the influence of calibration practices on cytogenetic laboratory performance for dose estimation
Investigation of the influence of calibration practices on cytogenetic laboratory performance for dose estimation Open
This work has shown the importance of dosimetry in radiobiology studies and the needs of harmonization, standardization in irradiation and dosimetry practices and educational training for biologists using ionizing radiation.
View article: RENEB – Running the European Network of biological dosimetry and physical retrospective dosimetry
RENEB – Running the European Network of biological dosimetry and physical retrospective dosimetry Open
RENEB is a European Network of biological and physical-retrospective dosimetry, with the capacity and capability to perform large-scale rapid individualized dose estimation. Specialized to handle large numbers of samples, RENEB is able to …
View article: RENEB biodosimetry intercomparison analyzing translocations by FISH
RENEB biodosimetry intercomparison analyzing translocations by FISH Open
The results obtained indicate that, despite the problems identified in few partners, which can be corrected, the RENEB consortium is able to carry out retrospective biodosimetry analyzing the frequency of translocations by FISH.
View article: Uncertainty of fast biological radiation dose assessment for emergency response scenarios
Uncertainty of fast biological radiation dose assessment for emergency response scenarios Open
Finally, it is demonstrated that whatever uncertainty estimation method is employed, ignoring the uncertainty on fast dose assessments can have an important impact on rapid biodosimetric categorization.
View article: RENEB accident simulation exercise
RENEB accident simulation exercise Open
Each participant received training in both the role of a reference laboratory (activating the network) and of a service laboratory (responding to an activation request). The procedures in the case of radiological event were successfully es…
View article: Web based scoring is useful for validation and harmonisation of scoring criteria within RENEB
Web based scoring is useful for validation and harmonisation of scoring criteria within RENEB Open
Overall, the web based scoring of the two galleries by the 17 laboratories produced very good results. Application of web based scoring for the dicentric assay may therefore be a relevant strategy for an operational biodosimetry assistance…
View article: The harmonization process to set up and maintain an operational biological and physical retrospective dosimetry network: QA QM applied to the RENEB network
The harmonization process to set up and maintain an operational biological and physical retrospective dosimetry network: QA QM applied to the RENEB network Open
The methodology used to harmonize all dosimetry practice within the network RENEB was highly successful. The network is operational to manage a mass casualty radiation accident for immediate dose assessment.
View article: Analysis of α-particle-induced chromosomal aberrations by chemically-induced PCC. Elaboration of dose-effect curves
Analysis of α-particle-induced chromosomal aberrations by chemically-induced PCC. Elaboration of dose-effect curves Open
In a similar way to high-dose exposures to low-LET radiations, cells show difficulties reaching mitosis after high-LET radiation exposure. For this reason, techniques have been proposed that are able to analyze chromosome aberrations in in…
View article: Integration of new biological and physical retrospective dosimetry methods into EU emergency response plans – joint RENEB and EURADOS inter-laboratory comparisons
Integration of new biological and physical retrospective dosimetry methods into EU emergency response plans – joint RENEB and EURADOS inter-laboratory comparisons Open
Further work is required before the new methods can be included within the suite of reliable dosimetry methods for use by RENEB partners and others in routine and emergency response scenarios.
View article: Differences in DNA Repair Capacity, Cell Death and Transcriptional Response after Irradiation between a Radiosensitive and a Radioresistant Cell Line
Differences in DNA Repair Capacity, Cell Death and Transcriptional Response after Irradiation between a Radiosensitive and a Radioresistant Cell Line Open
View article: Effect of Surface Modifications of Ti40Zr10Cu38Pd12 Bulk Metallic Glass and Ti-6Al-4V Alloy on Human Osteoblasts In Vitro Biocompatibility
Effect of Surface Modifications of Ti40Zr10Cu38Pd12 Bulk Metallic Glass and Ti-6Al-4V Alloy on Human Osteoblasts In Vitro Biocompatibility Open
The use of biocompatible materials, including bulk metallic glasses (BMGs), for tissue regeneration and transplantation is increasing. The good mechanical and corrosion properties of Ti40Zr10Cu38Pd12 BMG and its previously described biocom…