A5055256920- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Soil Science and Environmental Management
- Banana Cultivation and Research
- Porphyrin and Phthalocyanine Chemistry
- Plant and soil sciences
- Agricultural and Food Production Studies
- Heavy metals in environment
- Crystallography and molecular interactions
- Soil erosion and sediment transport
- Magnetism in coordination complexes
- Geochemistry and Elemental Analysis
- Nanoparticles: synthesis and applications
- Biofuel production and bioconversion
- Botanical Research and Applications
- Agroforestry and silvopastoral systems
- Public Health and Environmental Issues
- Heavy Metals in Plants
- Metal complexes synthesis and properties
- Water Resource Management and Quality
- Historical and socio-economic studies of Spain and related regions
- Molecular Junctions and Nanostructures
- Various Chemistry Research Topics
- Carbon and Quantum Dots Applications
- Characterization and Applications of Magnetic Nanoparticles
Instituto de Innovación Agropecuaria de Panamá
2021-2024
Instituto de Investigaciones Agropecuarias
1999-2023
Universidad de Panamá
2005-2022
University of Sucre
2018
The University of Texas at El Paso
2013-2014
University of California, Los Angeles
2007
The transfer of nanoparticles (NPs) into the food chain through edible plants is great concern. Cucumis sativus L. a freshly consumed garden vegetable that could be in contact with NPs biosolids and direct agrichemical application. In this research, cucumber were cultivated for 150 days sandy loam soil treated 0 to 750 mg TiO2 kg–1. Fruits analyzed using synchrotron μ-XRF μ-XANES, ICP-OES, biochemical assays. Results showed catalase leaves increased (U mg–1 protein) from 58.8 control 78.8...
There is lack of information about the effects nanoparticles (NPs) on cucumber fruit quality. This study aimed to determine possible impacts carbohydrates, proteins, mineral nutrients, and antioxidants in plants grown soil treated with CeO2 ZnO NPs at 400 800 mg/kg. Fourier transform infrared spectroscopy (FTIR) was used detect changes functional groups, while ICP-OES μ-XRF were quantify map distribution nutrient elements, respectively. Results showed that none NP concentrations affected...
Despite the remarkable number of publications on interaction engineered nanoparticles (ENPs) with plants, knowledge implications ENPs in nutritional value food crops is still limited. This research was performed to study quality rice grains harvested from plants grown soil treated cerium oxide (nCeO2). Three varieties (high, medium, and low amylose) were cultivated full maturity amended nCeO2 at 0 500 mg kg(-1) soil. Ce accumulation, nutrient content, antioxidant property, evaluated. Results...
Studies have shown that CeO₂ nanoparticles (NPs) can be accumulated in plants without modification, which could pose a threat for human health. In this research, cilantro (Coriandrum sativum L.) were germinated and grown 30 days soil amended with 0 to 500 mg kg⁻¹ NPs analyzed by spectroscopic techniques biochemical assays. At 125 kg⁻¹, produced longer roots (p ≤ 0.05), at there was higher Ce accumulation tissues 0.05). mg, catalase activity significantly increased shoots ascorbate peroxidase...
A crystalline triply bridged molecular gyroscope has been prepared and analyzed by single-crystal X-ray diffraction. convergent synthetic strategy was developed to control the direction of three bridges, from preferred two zonal one meridional arrangement a one-step cylclization process directed bridges achieved north-south desymmetrization.
The objective of this research was to determine the suitability soils for coffee cultivation in province Herrera, Republic Panama. Planting robusta is gaining greater interest among Panamanian farmers as an alternative soil conservation. On 19 farms samples were taken (0-20 cm) their properties and initiate a sustainable fertilization program that contributes improving productivity. Digital maps created using Q-GIS v.3.32.1 program. Herrera presented high percentage aluminum saturation, with...
<p>El objetivo de este estudio fue evaluar el efecto la zeolita sobre eficiencia uso fertilizantes nitrogenados en cultivo arroz. El experimento se estableció Cacao, Tonosí, provincia Los Santos, Panamá, entre agosto y diciembre 2012 2013, bajo condiciones secano. Se utilizó variedad arroz IDIAP FL 106-11 con densidad siembra 110 kg/ha un Fluvisol vértico fertilidad media. consistió cinco tratamientos cuatro repeticiones, diseño bloques completamente aleatorizados, una dosis N 80...
The objective of this research was to obtain anindex that could serve as a useful tool for environmentalassessment and managing agricultural banana soils inPanama. work performed in five independent farmsfrom Alanje District six properties belonging theCooperative COOSEMUPAR Baru (2005-2006). soilsbelong the orders Inceptisols (Andic Dystrudepts, Udichaplustepts Dystric haplustepts) Entisols (AndicUdifluvents). For description indicators, four pitswere opened each area high low productivity...
The synthesis and electronic properties of a series platinum(II) complexes composed electron-donor electron-acceptor components as potential photovoltaic materials is reported. are triphenylamines (TPA) pyridine-derivatized TPAs the electron-donating components, alkynyl derivatives 2,1,3-benzothiadiazole cyclopentadithiophenone electron acceptors. containing ligands were prepared to examine effect that direct coordination heteroatom-modified TPA may have on donor-acceptor (D-A) complexes....
A new donor-acceptor system, in which the electron donor triphenylamine (TPA) and acceptor C60 are bridged through a cis- or trans-platinum(II) acetylide spacer have been prepared. Ground-state studies were conducted using electrochemistry UV/Vis spectroscopy. Fluorescence suggested that charge transfer is deactivation mechanism for singlet excited state, this was verified by transient absorption Selective photoexcitation of 1 2 at 387 nm leads to fast between TPA C60, gives rise radical...
Este trabalho teve por objetivos determinar a influência de diferentes métodos preparo do solo sobre as perdas erosão metais pesados e na contaminação frutos pimentão (Capsicum annuum L.) com esses elementos. A avaliação foi realizada durante os meses dezembro 1999 março 2000, no ciclo cultivo Pimentão L.). Foram utilizadas parcelas tipo Wischmeier, tamanho 22,0 x 4,0m. Os tratamentos utilizados foram seguintes: (i) aração trator morro abaixo queima dos resíduos vegetais (MAQ); (ii) não...
The present work had the objective to produce and characterize charcoal from rice husks. husk was generated in a Top-lit updraft reactor. This process favorable for biochar production. By increasing airflow 12 24 L/min, reaction temperature increased 714 935 ° C (R <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> = 0.90), respectively. Similarly, average productivity varied 29.35 20.69 % between minimum maximum flows, indicated that...
Este trabalho teve por objetivos determinar a influência de diferentes métodos preparo do solo sobre as perdas erosão metais pesados e avaliar contaminação dos sedimentos da água córrego principal microbacia Caetés, município Paty Alferes (RJ). A avaliação foi realizada durante os meses dezembro 1996 março 1997, no ciclo cultivo pepino (Cucumis sativus L ). Foram utilizadas parcelas tipo Wischmeier, tamanho 22,0 x 4,0 m. Os tratamentos utilizados foram seguintes: (a) aração com trator morro...
Debido a la utilización extensiva de productos químicos para el control enfermedad llamada añublo bacterial, cual ha provocado emergencia patógenos resistentes, se promueve búsqueda alternativas viables que garanticen mayor sostenibilidad, por lo los aceites esenciales cascara naranja dulce y limón criollo propone como alternativa fitosanitaria del bacterial panícula arroz.En Colombia las enfermedades bacterias causan entre 80 90% pérdidas en producción arroz. La bacteria Burkholderia glumae...
Introducción. El contenido de nutrientes en la planta arroz (Oryza sativa) durante sus etapas fenológicas del cultivo es afectado por disponibilidad el suelo, dosis y fuente los fertilizantes, las variedades sistemas cultivos utilizados. Objetivo. objetivo este trabajo fue determinar extracción macro micro dos según etapa fenológica, un suelo Inceptisol bajo condiciones riego. Materiales métodos. estudio se realizó Penonomé, Coclé, Panamá, ciclos agrícolas 2015 2016. Se utilizaron IDIAP FL...
<p class="p1">El objetivo del presente trabajo fue determinar, en el cultivo de maíz, efecto manejo la fertilización fosforada a mediano y largo plazo con dos métodos aplicación. Se estableció un experimento El Ejido, Panamá, 2004 al 2013 suelo Udic Haplustalf. evaluaron componentes factorial 5 x 4 arreglo fajas bajo diseño bloques azar tres repeticiones. En parcela principal se aplicó P voleo dosis 0, 25, 50, 75 100 kgP/ha (aplicado sólo primer año), las sub-parcelas durante diez...
En Panamá, los lodos orgánicos de las plantas tratamiento aguas residuales (PTAR) no se utilizan en su totalidad. La carbonización estos presenta como una alternativa para la gestión este residuo orgánico. biomasa produce un material rico carbono conocido biocarbón. Además del contenido carbono, contiene nutrientes que podrían mejorar propiedades fisicoquímicas suelo y proporcionar porosidad mejoraría retención agua nutrientes. el 27% suelos están degradados debido a prácticas irregulares...
Determine the concentration of heavy metals in water, sediments, and crops within La Villa river basin, Herrera Los Santos provinces, republic Panama. Basin, south central Panama, rainy season 2016 (May to November) dry 2017 (December April). Twenty two sediments water samples were taken using systematic method which consists selecting sampling points at uniform distances upper, middle lower basin. The selected was confined a preferably rectangular area 10.0 m x 30.0 m, on sub-samples with...
Aim of study: To calculate Cd concentration in cocoa plants and evaluate its relationship with available other soil properties. Area Almirante, Bocas del Toro province, Panama, 2020-2021. Material methods: The study was carried out 21 plots eight cocoa-producing farms. total area each sampled plot 300 m2. Soil samples were taken at a depth 30 cm, the leaves fruits trees also taken. Descriptive statistics correlation analyses for variables plants. between bioavailable physicochemical...
Abstract Background By 2025, an estimated three‐quarters of the global population aged 60 and older will live in Latin American Caribbean countries (LAC), leading to a rise age‐related conditions. The main goal Panama Aging Research Initiative – Health Disparities (PARI‐HD) research program is create platform for multidisciplinary clinical studies that focus on mental health its diseases such as cognitive decline. This would generate large amount clinical, neuropsychological, lifestyle,...
The objective of the work was to characterize properties soils coffee-producing farms in provinces Cocle and Veraguas that allow preparation regionalized fertilization cards according edaphoclimatic characteristics each area. Planting robusta coffee is gaining greater interest among Panamanian farmers as an alternative for soil conservation. On 16 province Coclé 18 Veraguas, samples were taken (0-20 cm) understand their initiate a sustainable program contributes improving productivity....
Introducción. La degradación del suelo se desarrolla de forma natural a pequeña escala, sin embargo, la intervención hombre ha acelerado y maximizado. erosión es uno los principales procesos vinculados degradación, esta aunada sistemas explotación no adaptados al medio ambiente son base para reducción productividad contaminación cuerpos agua. En Panamá, afecta 20 787 km2, área que abarca zonas donde concentra gran parte producción agropecuaria país. Objetivo. Determinar pérdida por hídrica...
Dosis óptima para la fertilización nitrogenada del arroz, en Región Central de Panamá. El estudio se realizó los años 2003 y 2004 las Estaciones Experimentales Calabacito Guarumal fincas productores Mariato, Provincia Veraguas Tonosí, Los Santos. Se aplicaron dosis 0; 40; 80; 120; 160 200 kg N/ha, con urea como fuente nitrogeno. Adicionalmente 100 P2O5 /ha 50 K2O /ha, empleó fuentes superfosfato triple cloruro potasio, respectivamente. utilizaron variedades IDIAP 2503 CHI 3-30 Guarumal; CR...