A5068339621- Nanoparticles: synthesis and applications
- Pharmaceutical and Antibiotic Environmental Impacts
- Essential Oils and Antimicrobial Activity
- Mercury impact and mitigation studies
- COVID-19 impact on air quality
- Heavy metals in environment
- Copper-based nanomaterials and applications
- Water Quality and Pollution Assessment
- Adsorption and biosorption for pollutant removal
- Biosensors and Analytical Detection
- Pharmacology and Nanomedicine Research
- Nanotechnology research and applications
- Medicinal Plant Research
- Environmental Justice and Health Disparities
- Quantum Dots Synthesis And Properties
- Prenatal Substance Exposure Effects
- Chalcogenide Semiconductor Thin Films
- Plant Physiology and Cultivation Studies
- Healthcare and Environmental Waste Management
- Pharmacological Effects and Assays
- Moringa oleifera research and applications
- Heavy Metal Exposure and Toxicity
- Iron Metabolism and Disorders
- Diverse Scientific Research Studies
Pontificia Universidad Católica del Ecuador
2013-2023
Escuela Politécnica del Ejército
2020
Emerging contaminants in water bodies is an issue of concern due to their impact on the ecosystem and human health. The COVID-19 pandemic has forced implementation protective measures such as social distancing, lockdowns, remote work, which have affected tourism influx. This study aimed evaluate occurrence emerging pollutants Esmeraldas, a coastal province Ecuador, before during highly touristic region. For this purpose, surface waters from 14 beaches ten river mouths were sampled at...
The search for sensitive and rapid analytical techniques the determination of natural antioxidants is an area in constant growth due, among other aspects, to complexity plant matrices. In this study, silver nanoparticles prepared with aqueous extract Mimosa albida leaves were used assess their polyphenolic content antioxidant capacity. Silver characterized by different techniques. As a result, 6.5 ± 3.1 nm obtained. total phenolic was 1320.4 17.6 mg gallic acid equivalents GAE. 100 g-1 257.3...
Abstract Chemical elements, which are present in drinking water, could vary due to water sources, treatment processes or even the plumbing materials. Most of these elements do not represent a threat, while others, such as heavy metals, have been proven cause harmful effects over human and aquatic wildlife. In this study, quality three cities Ecuador, Quito, Ibarra Guayaquil was assessed through multielement analysis metal pollution index (HPI). A total 102 samples six natural were collected...
Introduction: Emerging contaminants (ECs) are substances with widely diverse chemical structures that may pose a risk to the environment and human beings. The limited scope of water treatment facilities, particularly in low middle-income countries, allows ECs be continuously introduced become part cycle again for potabilization. In this work, we study first time presence these compounds drinking five Ecuadorian cities. Methods: interest were mainly pharmaceutical commonly present...
Nanoparticles are a cause for concern because of their potential toxic effects on human health and the environment. The aim this study was to assess effect chitosan-coated magnetite nanoparticles (11.00±4.7 nm) Drosophila melanogaster through observation hemolymph composition, DNA damage, larval survival lifespan flies. Chitosan-coated were synthesized by co-precipitation method. larvaes adults exposed 500 1000 ppm solution. After exposure, each type hemocytes recognized. Comet assay...
Among emerging pollutants, endocrine disruptors such as estradiol are of most concern. Conventional water treatment technologies not capable removing this compound from water. This study aims to assess a method that combines physicochemical and biological strategies eliminate even when there other compounds present in the matrix. Na-montmorillonite, Ca-montmorillonite zeolite were used remove medium with sulfamethoxazole, triclosan, nicotine using Plackett–Burman experimental design; each...
Research on nanomaterial exposure-related health risks is still quite limited; this includes standardizing methods for measuring metals in living organisms. Thus, study validated an atomic absorption spectrophotometry method to determine fertility and bioaccumulated iron content Drosophila melanogaster flies after feeding them magnetite nanoparticles (Fe3O4NPs) dosed a culture medium (100, 250, 500, 1000 mg kg−1). Some NPs were also coated with chitosan compare assimilation. Considering both...
The importance of studying polyphenols as natural antioxidants has encouraged the search for new methods rapid, simple analysis. synthesis silver Nanoparticles (Ag NPs) using plant extracts been presented an alternative to determine presence polyphenolic compounds. In this study, aqueous extract chilca (Baccharis latifolia), endemic species from South America known its medicinal properties, was used. This extract, because composition, can convert Ag+ ions Ag0 in a chemical reduction process....
Se han descrito muchos estudios de biosíntesis nanopartículas plata usando el extracto del bulbo ajo (Allium sativum) como agente reductor. Sin embargo, uso sus hojas es poco conocido, por considerarse un producto desecho. En este estudio, se comparó tamaño obtenidas con acuoso las dos técnicas diferentes calentamiento: placa y microondas. Las caracterizaron espectrofotometría UV-Visible, microscopía transmisión electrónica (TEM, siglas en inglés), dispersión dinámica luz (DLS, inglés)...
Silver nanoparticles are recognized for numerous physical, biological and pharmaceutical applications. In this study, silver were successfully synthesized by green chemistry alternative reduction method, using Matico (Piper aduncum) leaves extract. The characterization was performed through Ultraviolet/VisibleSpectroscopy to estimatethe particle size; morphology elemental composition detected Scanning Electron Microscopy. Estimated radius measured Transmission interaction between extract...
Currently, resistance to antibiotics has become a problem for the treatment of infectious diseases. In this study, silver nanoparticles were synthesized using aqueous extract Palo santo (Burseragraveolens), its biocide action, in order determine antimicrobial effect on Escherichia coli and Staphylococcus aureus. Different concentrations (100 until1000 ppm) evaluated at contact times 1, 2, 5 10 minutes 1500 15000 CFU/mL. Additionally, effectiveness, disc diffusion tests various (500-1000...
The occurrence of emerging contaminants in water bodies is an issue concern due to the impact on ecosystem and human health. COVID-19 pandemic has forced implementation protective measures such as social distancing, lockdowns, telecommuting, which have affected environment. This study aimed evaluate pollutants Esmeraldas, a coastal province Ecuador, before after pandemic. For this purpose, surface waters from 14 beaches 10 estuaries were sampled at two timepoints November 2019 2020....