Javier Espinoza

ORCID: 0000-0003-0153-8534
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About
Contact & Profiles
Research Areas
  • Insect Pest Control Strategies
  • Insect and Pesticide Research
  • Hydraulic Fracturing and Reservoir Analysis
  • Essential Oils and Antimicrobial Activity
  • Reservoir Engineering and Simulation Methods
  • Oil and Gas Production Techniques
  • Forest Insect Ecology and Management
  • Polymer-Based Agricultural Enhancements
  • Phytochemicals and Medicinal Plants
  • Insect behavior and control techniques
  • Plant Pathogens and Fungal Diseases
  • Medicinal Plants and Neuroprotection
  • Traditional and Medicinal Uses of Annonaceae
  • Enhanced Oil Recovery Techniques
  • Insect-Plant Interactions and Control
  • Botanical Research and Chemistry
  • Allelopathy and phytotoxic interactions
  • Ethnobotanical and Medicinal Plants Studies
  • Heavy Metals in Plants
  • Pediatric Hepatobiliary Diseases and Treatments
  • Nephrotoxicity and Medicinal Plants
  • Venomous Animal Envenomation and Studies
  • Administrative Law and Governance
  • Agricultural safety and regulations
  • Advances in Cucurbitaceae Research

Universidad de La Frontera
2018-2025

Universidad Católica del Norte
2025

Universidad Católica de la Santísima Concepción
2024

Universidad de Los Andes, Chile
2021

Millennium Science Initiative
2021

Petroleum of Venezuela (Venezuela)
2007-2020

Pontificia Universidad Católica de Chile
2020

Universidad Andrés Bello
2018-2019

Baker Hughes (United States)
2019

Universidad de Guadalajara
2019

Staphylococcus aureus is a serious human pathogen that highly adaptive to environmental conditions and rapidly develops antibiotic resistance. The use of efflux pumps reduce concentrations at the intracellular level one main mechanisms by which bacteria develop management pumps, specifically NorA, expressed S. strains, valuable strategy for restoring susceptibility in strains resistant antibacterial agents. In recent years, many studies have focused on searching natural substances can...

10.3389/fmicb.2019.00337 article EN cc-by Frontiers in Microbiology 2019-02-26

Abstract Inter-organelle signalling has essential roles in cell physiology encompassing metabolism, aging and temporal adaptation to external internal perturbations. How such coordinates different organelle functions within adaptive responses remains unknown. Membrane traffic is a fundamental process which membrane fluxes need be sensed for the adjustment of cellular requirements homeostasis. Studying endoplasmic reticulum-to-Golgi trafficking, we found that Golgi-based, KDEL...

10.1038/s41467-019-08501-w article EN cc-by Nature Communications 2019-02-13

Conventional asphalt mixtures used for road paving require high manufacturing temperatures and therefore energy expenditure, which has a negative environmental impact creates risk in the workplace owing to emissions of pollutants, greenhouse gases, toxic fumes. Reducing consumption is continuous challenge industry. Previous studies have focused on reduction without characterizing their composition, detailed characterization volatile organic compounds (VOCs) semi-volatile (SVOCs) fumes...

10.3390/su12229546 article EN Sustainability 2020-11-17

The horn fly is an economically important hematophagous ectoparasite of cattle. Its management relies heavily on broad-spectrum pesticides, which are harmful to the environment and have led development resistance. Therefore, alternative control methods needed. Semiochemicals involved in communication between flies their host a promising alternative. Considering that egg-laying this occurs almost exclusively fresh cattle dung, most parts its life cycle occur totally dung volatiles might play...

10.3390/insects16020129 article EN cc-by Insects 2025-01-28

Abstract Background and objective Aging is characterized by a decline in tissue structure function that may be explained the development of cellular senescence. However, acquisition specific phenotypic responses senescent gingival fibroblasts still poorly understood. Here, we have analyzed whether proliferation primary cultures human affect different cell functions relevant to senescence deterioration. Methods Human from five young donors were expanded until was achieved. Cellular evaluated...

10.1111/jre.12727 article EN Journal of Periodontal Research 2020-01-14

Abstract In design and implementation of Alkali Surfactant Polymer (ASP) formulation for IOR processes, the inorganic alkali component acts as sacrificing agent avoiding surfactant adsorption decreasing IFT. Nevertheless, a part this process there are some potential problems to be considered previously during ASP injection processes such as: water should softened prevent scale formation that produces higher costs treatment, possible tubing corrosion viscosity reduction. The effect organic on...

10.2118/107776-ms article EN 2007-04-15

The beetle Hylastinus obscurus Marsham (Coleoptera: Curculionidae), endemic to Europe and Northern Africa, is one of the most important red clover pests in Chile. As commercial insecticides are less effective against this pest, plant secondary metabolites have been considered as an alternative for its control. Here, we investigated chemical composition essential oil (EO), petroleum ether extract (PEE), dichloromethane (DCME) from Pilgerodendron uviferum heartwood. Additionally, effects EO...

10.3390/molecules23061282 article EN cc-by Molecules 2018-05-27

Adverse effects caused by synthetic pesticides have increased interest in plant-derived insecticidal compounds, particular essential oils, as a more compatible and ecofriendly alternative for pest control of economic importance. For this reason, the oil isolated from leaves shoots Drimys winteri (J.R. Forster & G. Forster)-also named canelo (CEO)-was investigated its chemical profile action against Acanthoscelides obtectus (Say)-one most important post-harvest pests dry beans world-and...

10.3390/insects11060335 article EN cc-by Insects 2020-05-30

2-Ketones are signal molecules reported as plant growth stimulators, but their applications in vegetables have yet to be achieved. Solid lipid nanoparticles (SLNs) emerge a relevant nanocarrier develop formulations for the controlled release of 2-ketones. In this sense, seedlings Lactuca sativa exposed 125, 375, and 500 µL L−1 encapsulated 2-nonanone 2-tridecanone into SLNs were evaluated under conditions. evidenced spherical shape with size 230 nm. A doses was observed, where greater...

10.3390/plants12173094 article EN cc-by Plants 2023-08-29

The weevil Aegorhinus superciliosus Guérin (Coleoptera: Curculionidae), which is endemic to Central-Southern Chile and Argentina, one of the major berry pests in most important pest La Araucanía Region (38°44′9″S, 72°35′25″W). Due poor effectiveness problems surrounding implementation traditional control methods using organophosphate carbamate insecticides, new strategies for controlling this are needed. In communication, we evaluated behavioral responses male female A. volatile compounds...

10.3390/molecules21040533 article EN cc-by Molecules 2016-04-22

Understanding the molecular interactions that rule physicochemical properties of assemblies is particular interest when trying to explain behavior much more complicated systems, such as cell membranes. This work was devoted study a discotic nematic lyotropic liquid crystal, formed by sodium dodecylsulphate (3% SDS-d25) and decanol (20% DeOH-α-d2), dissolved in aqueous solutions (0.1% D2O) Na2SO4 or Li2SO4. The average size aggregates estimated using fluorescence quenching experiments, their...

10.1063/1.4811678 article EN The Journal of Chemical Physics 2013-07-02

Abstract This paper presents the design of a polymer flooding pilot test for an extra heavy oil reservoir located in Orinoco Oil Belt, Venezuela. We describe workflow consisting extensive experimental work, numerical simulation and upscaling that led to optimized flooding. Experimental results show both recovery consumption can be further improved when using low salinity water mixing. In addition this, project forecasts economic viability process. studied impact rheology recovery. Recovery...

10.2118/199014-ms article EN SPE Latin American and Caribbean Petroleum Engineering Conference 2020-07-06

Haematobia irritans is an obligate bloodsucking ectoparasite of cattle and the global major pest livestock production. Currently, H. management largely dependent upon broad-spectrum pesticides, which lately has led to development insecticide resistance. Thus, alternative control methods are necessary. Endophyte-infected grasses have been studied as due their capability biosynthesize alkaloids associated with anti-insect activities. main aim this study was evaluate antifeedant repellent...

10.3390/molecules26040817 article EN Molecules 2021-02-04

Murtilla (Ugni molinae) is a shrub native to Chile that has undergone an incipient domestication process aimed at increasing its productivity. The reduction in intrinsic chemical defenses due the resulted decrease plant's ability defend itself against mechanical or insect damage. In response this damage, plants release volatile organic compounds (VOCs) as means of defense. To understand how impacted production VOCs first offspring murtilla, we hypothesized their levels would be reduced...

10.3390/metabo13050616 article EN cc-by Metabolites 2023-04-30
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