Search results for: J. Oliva

Items from 1 to 20 out of 138 results

article

Inflammatory bowel disease induces pathological α‐synuclein aggregation in the human gut and brain

Ana M. Espinosa‐Oliva, Rocío Ruiz, Manuel Sarmiento Soto, Antonio Boza‐Serrano, more

Neuropathology and Applied Neurobiology > 50 > 1 > n/a - n/a

Aims According to Braak's hypothesis, it is plausible that Parkinson's disease (PD) originates in the enteric nervous system (ENS) and spreads to the brain through the vagus nerve. In this work, we studied whether inflammatory bowel diseases (IBDs) in humans can progress with the emergence of pathogenic α‐synuclein (α‐syn) in the gastrointestinal tract and midbrain dopaminergic neurons. Methods...

article

How relevant are social costs in economic evaluations? The case of Alzheimer’s disease

L. M. Peña-Longobardo, B. Rodríguez-Sánchez, J. Oliva-Moreno, I. Aranda-Reneo, more

The European Journal of Health Economics > 2019 > 20 > 8 > 1207-1236

Background The main objective of this study was to analyse how the inclusion (exclusion) of social costs can alter the results and conclusions of economic evaluations in the field of Alzheimer’s disease interventions. Methods We designed a systematic review that included economic evaluations in Alzheimer’s disease. The search strategy was launched in 2000 and ran until November 2018. The inclusion...

article

Effective monitoring of freshwater fish

Johannes Radinger, J. Robert Britton, Stephanie M. Carlson, Anne E. Magurran, more

Fish and Fisheries > 20 > 4 > 729 - 747

Freshwater ecosystems constitute only a small fraction of the planet's water resources, yet support much of its diversity, with freshwater fish accounting for more species than birds, mammals, amphibians or reptiles. Fresh waters are, however, particularly vulnerable to anthropogenic impacts, including habitat loss, climate and land use change, pollution and biological invasions. This environmental...

article

DFT study of small gas molecules adsorbed on undoped and N-, Si-, B-, and Al-doped graphene quantum dots

F. Montejo-Alvaro, J. Oliva, M. Herrera-Trejo, H. M. Hdz-García, more

Theoretical Chemistry Accounts > 2019 > 138 > 3 > 1-15

A theoretical study about the interaction between small gas molecules (H₂O, CO, CO₂, NH₃, and CH₄) with graphene quantum dots (GQDs) was performed. To develop gas sensors with ultralow detection levels, the nature of the bonds between the gas molecules and the GQDs should be understood and controlled. It was found that the binding energy (E_b) of the gas molecules with the GQDs can be controlled if...

article

Sputtered transparent conducting graphene films on iron oxide coated glass

F. Montejo-Alvaro, J. Oliva, A. Zarate, M. Herrera-Trejo, more

Journal of Materials Science: Materials in Electronics > 2019 > 30 > 4 > 4310-4317

This work reports the optical, electrical and morphological properties of graphene (G) films. Firstly, glass substrates were coated with iron oxide (IO) films using a spraying method. Subsequently, the sputtering technique was employed for the formation of graphene films on the IO layers (G/IO films). According to XPS spectra, the IO films offered anchorage sites for the growth of G that improved...

article

Enhanced photocatalytic activity of layered perovskite oxides Sr2.7-xCaxLn0.3Fe2O7-δ for MB degradation

L.E. Verduzco, R. Garcia-Diaz, J. Oliva, A.I. Martinez, more

Ceramics International > 2018 > 44 > 14 > 17079- 17086

The photocatalytic properties of the layered perovskites belonging to n = 2 series of Ruddlesden ‒ Popper oxides Sr_2.7-xCa_xLn_0.3Fe₂O_7-δ with x = 0 and 0.3, and Ln = La and Nd have been studied by monitoring the degradation of methylene blue (MB) dye under solar and UV irradiation. The Sr_2.7-xCa_xLn_0.3Fe₂O_7-δ samples were synthesized by a conventional solid-state reaction and all the samples crystallized...

article

Labour productivity loss caused by premature deaths associated with breast cancer: results from Spain over a 10-year period

J. Oliva-Moreno, L. M. Peña-Longobardo

Breast Cancer Research and Treatment > 2018 > 172 > 3 > 571-576

Background Breast cancer is one of the most common cancers among women worldwide, and is the most common cause of cancer deaths in them. Given that such disease has a significant impact on middle-aged women, it can result in considerable labour productivity losses. The main objective of this study is therefore to analyse labour productivity losses and years of potential working life lost as a result...

article

Highly efficient hydrogen generation of BiI3 nanoplates decorated with Ag nanoparticles

L.A. Diaz-Torres, C. Gomez-Solis, J. Oliva, E. Coutino-Gonzalez

International Journal of Hydrogen Energy > 2018 > 43 > 33 > 15962- 15974

This work presents the photocatalytic hydrogen generation of BiI₃ films when they are exposed under simulated solar irradiation. Those films were fabricated by a simple bath chemical deposition method. The images of Scanning electron microscopy show that the BiI₃ films are formed by polycrystalline particles with hexagonal shape and a closer inspection shows that nanoplates grown into them. The performance...

article

Effect of the Er³⁺ Co-dopant on the Green Upconversion Emission of LaSr₂AlO₅:Yb³⁺ Phosphors

J. Oliva, C. R. García, L. A. Díaz Torres, C. Camacho, more

Journal of Electronic Materials > 2018 > 47 > 11 > 6567-6574

This work presents the structural, morphological and optical properties of LaSr₂AlO₅:Yb³⁺,Er³⁺ phosphors (LSA:Yb,Er) synthesized by a combustion method. The Yb³⁺ concentration was kept constant at 2 mol.%, while the Er³⁺ concentration changed from 0.2 mol.% to 6 mol.%. X-ray diffraction measurements revealed that all the LSA:Yb,Er phosphors presented a pure tetragonal phase. Scanning electron microscopy...

article

Flexible graphene composites for removal of methylene blue dye-contaminant from water

J. Oliva, A.I. Martinez, A.I. Oliva, C.R. Garcia, more

Applied Surface Science > 2018 > 436 > C > 739-746

This work presents the use of flexible graphene composites (FGCs) fabricated by a casting method for the removal of Methylene blue (MB) dye from water. Those FGCs with elastic modulus of 15 MPa had enough mechanical resistance to support the Al₂O₃:Eu³⁺ and SrAl₂O₄:Bi³⁺ photocatalytic powders. After the incorporation of those powders in the FGCs, their photocatalytic activity was evaluated by monitoring...

article

Photocatalytic activity of bismuth doped SrAl2O4 ceramic powders

C.R. García, J. Oliva, A. Arroyo, M.A. Garcia-Lobato, more

Journal of Photochemistry and Photobiology A: Chemistry > 2018 > 351 > C > 245-252

The Photocatalytic activity of bismuth doped SrAl₂O₄ ceramic powders was studied by monitoring the degradation of the Methylene Blue (MB) and Congo Red (CR) dyes in water solution under ultraviolet (254nm) and solar irradiation. The SrAl₂O₄:xBi powders were synthesized by a combustion method with different Bi weight percentages. XRD patterns of these powders indicate the presence of pure monoclinic...

article

Influence of matrix on the bioavailability of nine fungicides in wine grape and red wine

J. Oliva, G. Martínez, S. Cermeño, M. Motas, more

European Food Research and Technology > 2018 > 244 > 6 > 1083-1090

The influence of the matrix and the concentration of the pesticides on the bioavailability of the dimethomorph, ametoctradin, boscalid, fenhexamid, mepanipyrim, cyazofamid, kresoxim-methyl, pyraclostrobin, and metrofenone fungicides in grapes and red wine are studied. Bioavailability is calculated using an in vitro procedure and by simulating human gastric digestion by dialyzation of the fungicides...

article

Enhancing the photocatalytic activity of the perovskite-based intergrowth oxide Sr3.2La0.8Fe1.5Co1.5O10-δ with Ca substitution

J. Oliva, C.R. Garcia, E. Verduzco, A.I. Martinez, more

Ceramics International > 2017 > 43 > 16 > 14074- 14081

In this work, the photocatalytic properties of the perovskite-based intergrowth oxides (three-layer Ruddlesden–Popper phase) Sr_3.2−xCa_xLa_0.8Fe_1.5Co_1.5O_10-δ (SCLFCO) with x = 0, 0.2, 0.4, and 0.8 were studied by monitoring the degradation of methylene blue (MB) dye in water solution under solar irradiation. The SCLFCO samples were synthesized by a conventional solid-state reaction. XRD patterns showed...

article

Red-emitting SrGe4O9:Eu3+ phosphors obtained by combustion synthesis

C.R. Garcia, J. Oliva, M.A. Garcia-Lobato, A.I. Martínez, more

Ceramics International > 2017 > 43 > 15 > 12876- 12881

In this work, red-emitting Strontium-Germanate SrGe₄O₉:xEu³⁺ (SGO) phosphors doped with x = 0%, 1%, 3% and 5at% of Eu were obtained by a combustion method. The X-ray diffraction patterns of these phosphors revealed that all the samples have a trigonal phase. Morphological studies by scanning electron microscopy (SEM) showed irregular coalesced grains that formed with sizes in the range of 0.14–0.22µm...

article

Differences In Labour Participation Between People Living With HIV And The General Population: Results From Spain Along The Business Cycle

LM Peña-Longobardo, J Oliva-Moreno

Value in Health > 2017 > 20 > 9 > A768-A769

article

Labour Productivity Losses Associated with Breast Cancer: An Analysis Along A Decade in Spain

J Oliva-Moreno, LM Peña-Longobardo

Value in Health > 2017 > 20 > 9 > A429

article

Disappearance of six pesticides in fresh and processed zucchini, bioavailability and health risk assessment

J. Oliva, S. Cermeño, M.A. Cámara, G. Martínez, more

Food Chemistry > 2017 > 229 > Complete > 172-177

A field study was carried out on the dissipation of three insecticides and three fungicides during the freezing of zucchini. A simultaneous residue analysis method is validated using QuEChERS extraction with acetonitrile and CG–MS and LC–MS analysis. The residues detected after field application never exceeded the established maximum residue limits. The processing factors calculated (fresh product/frozen...

article

Effect of cobalt on the electrochromic properties of NiO films deposited by spray pyrolysis

A. Martinez-Luevanos, J. Oliva, C. R. Garcia, F. Avalos-Belmontes, more

Applied Physics A > 2017 > 123 > 5 > 1-8

In this work, the morphological, optical and electrochromic properties of NiO and Ni–Co oxides films are reported. Those films were deposited on FTO glass substrates using a simple spray pyrolysis method. SEM images indicated that the size of particles that formed the Ni–Co oxide films decreased from 18 to 6 nm as the content of Co increases. In addition, the thickness of the films decreased from...

article

Up-conversion of luminescence in YPO4:Er3+ powders. A new technique

S.I. Rivera, F.J. Carrillo, A. García, J. Oliva

Materials Letters > 2017 > 187 > Complete > 83-85

In this paper, Y_0.95 Er_0.05 PO₄ phosphor nanomaterial with tetragonal structure was successfully synthesized to realize NIR to VIS up-conversion. Synthesis control over the property of material was made in conventional hydrothermal method and controlled pressure method with nitrogen. X-Ray diffraction pattern confirmed the tetragonal phase of the crystals and further, morphology was studied using...

article

Evolution of the structural and electronic properties of small alkali metal-doped aluminum clusters

K.O. Alcantar-Medina, M. Herrera-Trejo, A. Tlahuice-Flores, S. Martinez-Vargas, more

Computational and Theoretical Chemistry > 2017 > 1099 > C > 55-63

The atomic arrangement of Al_n and Al_nM clusters (n=2–14, M=Li, Na o K) was determined by combining both the basin hopping (BH) algorithm using the Gupta potential, and density functional theory (DFT) calculations. The BH yielded hundreds of structures that were refined by DFT using the PBE framework, and Ahlrichs-VDZ basis sets. Anions, neutrals and cations of Al_n and Al_nM clusters were calculated...

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INFONA - science communication portal

Search results for: J. Oliva

Inflammatory bowel disease induces pathological α‐synuclein aggregation in the human gut and brain

How relevant are social costs in economic evaluations? The case of Alzheimer’s disease

Effective monitoring of freshwater fish

DFT study of small gas molecules adsorbed on undoped and N-, Si-, B-, and Al-doped graphene quantum dots

Sputtered transparent conducting graphene films on iron oxide coated glass

Enhanced photocatalytic activity of layered perovskite oxides Sr2.7-xCaxLn0.3Fe2O7-δ for MB degradation

Labour productivity loss caused by premature deaths associated with breast cancer: results from Spain over a 10-year period

Highly efficient hydrogen generation of BiI3 nanoplates decorated with Ag nanoparticles

Effect of the Er³⁺ Co-dopant on the Green Upconversion Emission of LaSr₂AlO₅:Yb³⁺ Phosphors

Flexible graphene composites for removal of methylene blue dye-contaminant from water

Photocatalytic activity of bismuth doped SrAl2O4 ceramic powders

Influence of matrix on the bioavailability of nine fungicides in wine grape and red wine

Enhancing the photocatalytic activity of the perovskite-based intergrowth oxide Sr3.2La0.8Fe1.5Co1.5O10-δ with Ca substitution

Red-emitting SrGe4O9:Eu3+ phosphors obtained by combustion synthesis

Differences In Labour Participation Between People Living With HIV And The General Population: Results From Spain Along The Business Cycle

Labour Productivity Losses Associated with Breast Cancer: An Analysis Along A Decade in Spain

Disappearance of six pesticides in fresh and processed zucchini, bioavailability and health risk assessment

Effect of cobalt on the electrochromic properties of NiO films deposited by spray pyrolysis

Up-conversion of luminescence in YPO4:Er3+ powders. A new technique

Evolution of the structural and electronic properties of small alkali metal-doped aluminum clusters

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