María Del Refugio Castañeda-Chávez

TECNOLÓGICO NACIONAL DE MÉXICO/INSTITUTO TECNOLÓGICO DE BOCA DEL RÍO

Twenty prototypes of Venturi-type fertilizer injectors for low-pressure agricultural irrigation systems were designed based on functional hydraulic pressure head and variation of their structural designs. These prototypes were modelled in three dimensions (3D) and evaluated using simulation through Computational Fluid Dynamics software (CFD). The m...

Objective: To evaluate the adaptation process of ornamental tropical macrophytes irrigated with wastewater, through physiological measurements before and after planting in a tropical constructed wetland (CW). Design/Methodology/Approach: Three fractions were evaluated with 50%, 75%, and 100% wastewater and natural water (blank) in 0.5 × 2.0 m fiber...

The shape of the urogenital papilla is used to visually determine the sexual dimorphism of Dormitator maculatus. However, it is occasionally not possible to determine this in practice. The objective of the present study was to propose and statistically validate other morphometric measures to fulfill this same purpose. The analysis was designed on t...

Farmers have increased the production of food by using chemical substances such as diuron; however, these components affect the water quality and the species found in these ecosystems. Macrobrachium acanthurus and M. olfersii postlarvae present in the estuary of Río Jamapa, Veracruz were collected to measure the LC50 and LD50 using the herbicide Ka...

El Sistema de Lagunas Interdunarias de la Ciudad de Veracruz (SLICV) forma parte de los ecosistemas naturales conocidos como sitios Ramsar, cuyo objetivo se centra en la conservación de funciones ecológicas. Este sistema, ubicado en la zona conurbada Veracruz-Boca del Río, está constituido por 18 lagunas consideradas “poco frecuentes”, ya que son c...

Fishing of the brown shrimp Penaeus aztecus is an important socioeconomic activity, generating income and different jobs for the fishing sector; however, this species is exposed to contaminants such as toxic metals. The objective of this research was to determine the concentrations of Cd, Pb, Cr, and Ni in brown shrimp P. aztecus from the northwest...

Este estudio muestra las especies microbianas dominantes que conforman un consorcio eficiente en el proceso de degradación de hidrocarburos obtenido de un cenote localizado en Playa del Carmen, en el Caribe Mexicano. Los microorganismos que conforman el consorcio se identificaron mediante diferentes pruebas bioquímicas y fenotípicas. Adicionalmente...

Los biocombustibles son una alternativa viable a la sustitución parcial o total de los combustibles fósiles, por consiguiente, el biodiésel es una opción para suplir al diésel, ya que puede utilizarse sin modificar los motores existentes y ofrecer un proceso de distribución seguro. En esta revisión, se resumen las materias primas utilizadas en los...

The objective of this work was to evaluate the acute toxicity of the commercial herbicides Karmex ® (diuron: DCMU 3-(3,4-dichlorophenyl)-1,1-dimethylurea) and Herbipol ® (glyphosate: N-(phosphonomethyl) glycine) on the megalopae of Callinectes sapidus and measure their relative abundance in the association of larval and postlarval species of crusta...

Notwithstanding the benefits that oil provides as a source of energy, society also recognizes the environmental problems caused by its use. We evaluated eight coastal sites in the central area of the Gulf of Mexico. At these sites, 14 hydrocarbons were detected which belong to compounds formed by carbons ranging from C9 to C27. The hydrocarbons wit...

En México, cuando los sitios de disposición final de residuos sólidos urbanos son clausurados o cumplen su ciclo de vida, las autoridades municipales los abandonan sin llevar a cabo procesos de remediación. En la Región de Sotavento, estado de Veracruz, México, por medio de los sistemas de información geográfica, entrevistas a los ayuntamientos y v...

The objective of this work is to show the population structure of V. tiliifolia under natural conditions. The study was conducted in three municipalities in the state of Veracruz, México; through transects of 20 × 100 m (2000 m2), the population structure, density and spatial distribution of natural populations were determined. The edaphic and clim...

The present work analyzes the current situation of scientific research on heavy metals and current regulations in macroinvertebrates (Penaeus) from the coastal region of the Gulf of Mexico. Its association with public health was identified based on national and international permissible limits for this fishery resource. The research analysis identi...

The present study aimed to test the effect of three stocking densities: 100, 200, and 300 ind m-3 (D100, D200, and D300, respectively) on survival, growth (weight and total length), and condition factor of Microphis brachyurus. At the end of the six-week trial, there were no significant differences in the fish's survival, growth, and condition. The...

The morphological and physiological response of papaya plants exposed to cadmium (Cd) contaminated soil was evaluated using 2 and 10% organic matter (OM), low organic matter (LPOM) and high organic matter (HPOM) soil, respectively. Cadmium chloride (CdCl 2 ) was added weekly at doses of 50, 100 and 150 mg/L and a control treatment. Height, stem thi...

Antecedentes. La zona sur del estuario del río Jamapa, Veracruz, es un lugar de transición entre el río y el medio marino al que se transportan sedimentos, compuestos y especies de crustáceos hasta la zona nerítica donde se encuentra el Parque Nacional Sistema Arrecifal Veracruzano. Objetivo. Se evaluaron las respuestas de exposición de las postlar...

Aquatic organisms, such as fish, are important indicators of the bioavailability of metals in coastal environments, demonstrating the capacity of different species to bioaccumulate these metallic elements. The fluvial-lagoon system of the Palizada River is an important ecosystem for its terrestrial and aquatic biological diversity where fishing is...

Resumen Cada año se vierten millones de metros cúbicos de aguas residuales a los cuerpos de agua, las cuales son tratadas de forma inadecuada, siendo estos procedimientos ineficientes para alcanzar lo requerido por la ley o para uso dentro de los procesos industriales. En estos casos, y debido a la escasez del hídrico, se está recurriendo al uso de...

Cada año se vierten millones de metros cúbicos de aguas residuales a los cuerpos de agua, las cuales son tratadas de forma inadecuada, siendo estos procedimientos ineficientes para alcanzar lo requerido por la ley o para uso dentro de los procesos industriales. En estos casos, y debido a la escasez del hídrico, se está recurriendo al uso de los pro...

Objective: To identify and estimate waste production, water consumption and production practices of backyard swine farms at the municipality of Tepetlán; Veracruz, Mexico, to foresee the possible influences on the environment and generate information that promotes new public environmental policies adapted to small producers.Methodology: 36 backyard...

The objective of the research was through key actors to identify the contamination by hydrocarbons and heavy metals in water and the main sources of contamination in the municipality of Macuspana, Tabasco. Methodology: A diagnosis was made, by applying questionnaires through interviews directed to the inhabitants of the municipality of Macuspana an...

El principio de precaución puede resumirse en: Si una actividad implica un peligro para la salud humana o para el medio ambiente, se deben llevar a cabo medidas preventivas, incluso cuando existe incertidumbre sobre la relación causa-efecto, o no estén confirmadas completamente

The Jamapa River basin is located in the central region of the State of Veracruz, it is born in the Pico de Orizaba and connects with the Veracruz Reef System in the Gulf of Mexico, both protected natural areas. The lower part of the basin has the contribution of two important effluents, Arroyo Moreno, which is a protected natural area, strongly im...

A helminthological analysis was performed on 91 specimens of the porkfish, Anisotremus virginicus (Linnaeus) (Haemulidae), captured in coral reef habitats of the Parque Nacional Sistema Arrecifal Veracruzano (PNSAV) (Veracruz Reef System National Park), in Veracruz, Mexico. A total of 22 helminth taxa were recorded: 9 digeneans, 6 monogeneans, 1 ce...

Paraquat is an herbicide used in the agricultural industry for weed and undergrowth control, its mode of action is by contact and nonselective. Due to its high-water solubility and low volatility, it represents a potential risk for non-target organisms. Oreochromis niloticus tilapia and the prawn Macrobrachium olfersii are important commercial spec...

En México, el consumo del Crassostrea virginica acumula ingresos cercanos a los tres millones de dólares, equi-valente a una producción total nacional de 19 568 t. Dentro de esa producción el sistema lagunar de Mandinga (Veracruz, México) tiene un aporte importante (~8 % de la producción nacional). Sin embargo, esta actividad se ha deteriorado por...

Objective: This article describes and analyzes the main concepts of coastal ecosystems, these as a result of research concerning land-use change assessments in coastal areas. Design/Methodology/Approach: Scientific articles were searched using keywords in English and Spanish. Articles regarding land-use change assessment in coastal areas were selec...

Tropical gar (Atractosteus tropicus) is currently exploited regionally as food and commercialized in the aquarium trade. Natural populations of A. tropicus may already be negatively affected by anthropogenic alteration of the areas in which it is distributed. However, it is necessary to deepen the knowledge for the optimization of its culture. A. t...

The objectives of this research are: identify the hydrocarbons in water from the Bitzal River, Tabasco; select a carbon source that serves as a representative substrate of the determined compounds; and finally, design an experimental proposal for bioreactors that are capable of consuming compounds formed by complex mixtures and, therefore be effect...

The aim of this study was to determine parameters of dissolved oxygen, temperature and nitrogen in the coastal basin of the Jamapa River as indicators of eutrophication. Six sampling sites were selected in the lower basin, where samples were collected in triplicate in each site, during three seasons; north winds, dry and rainy. Results of the resea...

Agricultural activities are one of the main sources of environmental pollution. One such source is sugarcane burning and the related agroindustrial processes carried out by sugar mills that emit a great volume of particulate matter containing heavy metals such as cadmium (Cd), copper (Cu), lead (Pb) and zinc (Zn). These heavy metals result in serio...

The effect of different levels of temperature (23, 26, 29, and 32ºC) and salinity (0, 5, and 10‰) on growth performance and survival of Macrobrachium americanum was studied under controlled laboratory conditions. Sub-adult’s prawns (10.29 ± 0.27 g) were reared in these conditions for 72 days. Each experimental group contained 25 prawns in an approx...

Surface waters are exposed during their journey to various types of pollutants plus the contribution they receive from different effluents. The objective of this investigation was to evaluate the concentration of Pb, Cd, and Cu in surface waters of the Cotaxtla-Jamapa basin in Veracruz, Mexico. Analyzes were carried out in triplicate in six samplin...

The aim of this research was to evaluate the impact of heavy metals on Maradol papaya cultivation soil, through the geoaccumulation index (Igeo) and the ecological potential risk index (RI). Soil samples from 15 locations in the Cotaxtla municipality of Veracruz, Mexico were tested for pH, soil texture, and concentrations of lead (Pb), chromium (Cr...

The fluvial–lagoon–deltaic system of the Palizada River in Campeche is an ecosystem of socioeconomic and ecological importance. It is justifiable to carry out studies in this system due to its connection with another larger ecosystem called the Términos Lagoon. The objective of this investigation was to analyze the concentration of Pb and Cd in sed...

Resumen La agricultura convencional, está contaminando el agua y el suelo, el uso masivo del thiamethoxam, genera presencia de residuos que se acumulan en las frutas, con el riesgo de causar daños a la salud pública. El objetivo es conocer el manejo del thiamethoxam en el agroecosistema con papaya en Veracruz, México y conocer el manejo orgánico qu...

Se realizó el diagnóstico de las fuentes de contaminación que pueden afectar al ecosistema costero marino del Parque Nacional Costa Occidental de Isla Mujeres, Punta Cancún, Punta Nizuc. Fueron observadas malas prácticas por parte de los prestadores de servicios turísticos en cuanto a disposición de desechos sólidos y efluentes. De igual manera, se...

Se identifican y cuantifican en un espectrofotómetro de absorción atómica, las concentraciones de tres metales pesados: Cd, Pb y V, en muestras de sedimentos colectadas en ocho sitios de muestro en la Reserva de la Biosfera Los pantanos de Centla, Tabasco. La media de las concentraciones determinadas concluye que la zona de estudio se encuentra con...

La vegetación ribereña funciona como amortiguador contra impactos naturales y humanos: las raíces estabilizan las riberas y reducen los impactos erosivos durante las crecientes y previenen los deslaves de las mismas (Hawes, 2005). Proporciona sustrato para los organismos acuáticos y terrestres, la cobertura que proporcionan las copas de los árboles...

Los pasivos ambientales son aquellos sitios contaminados con problemas causados por el uso industrial del suelo por un mal manejo de sus residuos peligrosos, donde existe la necesidad de una remediación. Para una buena remediación se debe conocer a fondo los suelos contaminados para ello se debe realizar la caracterización de este, pues la estrateg...

Contribuir al desarrollo económico, social y cultural de la región, del Estado de Veracruz y en general de México, atendiendo la demanda de educación superior para la formación de profesionistas emprendedores e innovadores de tecnología, comprometidos con la implementación de la calidad y la formación integral para que desarrollen actitudes de comp...

El endosulfán es un plaguicida organoclorado de amplio espectro con formula química según la IUPAC (Unión Internacional de Química Pura) 6,7,8,9,10,10-hexacloro-1,5,5a,6,9,9ahexahidro- 6,9-metano-2,4,3-benzodioxathi-epin-3-oxido, conformado por dos isómeros: α en una proporción 64 a 67 % y el β de 29 a 32 %. Este fue patentado por Farbwerke Hoechst...

La zona costera es una zona de transición entre los componentes marino y continental del planeta. Es ampliamente reconocida como uno de los más importantes elementos de la biosfera con una amplia diversidad de ambientes y recursos. Una intensa interacción de ambientes caracteriza a las zonas costeras del mundo y el balance de estas interacciones or...

La zona costera (ZC) es el área de unión entre el océano y el continente (Goldberg, 1994). Es un amplio espacio donde interacciona el mar, la tierra, las aguas epicontinentales y la atmósfera (Yáñez, 1986). De acuerdo con la Organización de Cooperación y Desarrollo Económico (1995), la ZC se extiende hacia el interior de las tierras hasta el límite...

The fluvial-lagoon-deltaic system of the Palizada river in Campeche is an ecosystem of socioeconomic and ecological importance. It is justifiable to carry out studies in this system, due to its connection with another larger ecosystem called Términos lagoon. The objective of this investigation was to analyze the concentration of Pb and Cd in sedime...

En este trabajo se muestran los resultados obtenidos en la fase experimental, de un reactor de lecho fijo de flujo descendente que utiliza como medio de soporte arena sílica, para la remoción de materia orgánica. Se preparó agua residual sintética (ARS) con niveles altos de materia orgánica, que están fuera de los límites de la normatividad para ag...

Los municipios de Veracruz, Boca del Río y Alvarado han crecido en la última década debido a la ampliación del puerto y al aumento de las actividades industriales que generan un impacto negativo en el ambiente, lo que afecta directamente a los ecosistemas costeros, como es el caso de los arrecifes de coral; estos impactos pueden favorecer la presen...

INNOVACIÓN TECNOLÓGICA SUSTENTABILIDAD ACUÍFERA, AMBIENTAL Y ENERGÉTICA

Concentrations of cadmium (Cd), lead (Pb), vanadium (V), and zinc (Zn) were measured in the muscle of 30 specimens of Pterois volitans, captured on April 2018, in the Veracruz Reef System National Park (VRSNP), Veracruz, Mexico. Concentrations, in the samples, were quantified with atomic absorption spectrophotometry (AAS), after microwave digestion...

El avance que ha generado la presencia del Pterois volitans en la región del golfo de México es relevante, debido a que se ha reportado en las costas de los estados de Yucatán, Quintana Roo, Tabasco, Tamaulipas, Campeche y Veracruz. En las costas de este último, se considera que la invasión del pez león ha traspasado a sus principales arrecifes: Si...

El estado de Veracruz se encuentra en una zona estratégica por tener un litoral de 745 km con diversos ecosistemas costeros como: playas, esteros, bahías, estuarios y lagunas costeras. En esta región se ubican 17 sistemas lagunares, entre éstos, el Sistema Lagunar de Mandinga (SLM) sobresale por su gran extensión territorial. Alrededor de este sist...

La generación de las aguas residuales de índole industrial va en constante aumento debido al crecimiento demográfico, lo cual ha propiciado una creciente necesidad de abastecer a la población de distintos tipos de servicios o productos, en los cuales el agua es usada como método de limpieza, entre otras operaciones, las cuales modifican sus caracte...

Los sueros de leche de cabra se caracterizan por ser una de las alternativas probióticas utilizadas en los sectores ganadero, agrícola e industria alimentaria. Sin embargo, poco son los estudios que relacionen su poder de inhibición en el sector acuícola. Los extractos naturales a base de leche de cabra son una fuente activa que se compone de bacte...

ABSTRACTA helminthological examination was carried out on 14 specimens of Eucinostomus melanopterus(flagfin mojarra)and 19 Eugerres plumieri(striped mojarra), of which atotal of 461 helminths were collected. As a result,and 12 taxa were registered (fivespecies, fivegenus and tow family levels), as follows: fourmonogeneans, fivedigeneans(fouradults,...

Thiamethoxam is a neonicotinoid with systemic and contact action, used in Mexico for the care of different traditional fruit crops, mainly in the cultivation of papaya. Soils of agroecosystems with papaya in the Gulf of Mexico area, the main producers of this fruit, are currently characterized as 45% of the producers organize papaya cultivation in...

La horticultura de traspatio es una alternativa para mejorar la alimentación de las familias mexicanas, y además permite obtener un ingreso adicional por la venta del exceso de cosechas a nivel local. El estado de Chiapas es considerado uno de los de mayor población en las zonas urbanas y periurbanas que se dedican a la agricultura de autoconsumo,...

The energy demand of the world population is increasing due to population growth and technological development. The current energy base is a generator of CO2 emissions, the most abundant and main greenhouse gas responsible for global warming, as well as pollutants, sulfur oxides and nitrogen oxides. The environmental deterioration and the increase...

Megchún-García, J.V.; Castañeda-Chávez, M.D.R.; Rodriguez Lagunes, D.A.; Murguia-Gonzalez, J.; Lango-Reynoso, F.; Leyva-Ovalle, O.R. Thiamethoxam in Soil and Water in Papaya Cultivation (Carica papaya Linnaeus) Associated with Watermelon Cultivation (Citrullus lanatus) in Mexico. Preprints 2019, 2019030277. https://www.preprints.org/manuscript/2019...

Leachates are formed by the decomposition of solid waste contained in the final disposal site from liquids formed by precipitation or humidity in the area. W hich, when filtered through waste, entrain substances in dissolved form and/or in suspension, creating a dark coloured liquid of variable characteristics and difficult to degrade, leading to c...

There are very few studies on the application of fertilizers through irrigation water (fertirrigation) using a multi-gate irrigation system in sugarcane AES. Through fertirrigation, the application of fertilizers can be simplified, and their distribution uniformity in sugarcane fields improved. This paper provides an overview of the state of the ar...

This study aimed to evaluate the effect of temperature-salinity interaction on physico-chemical parameters, plankton composition, performance growth, and survival of shrimp Penaeus vannamei raised in intensive nursery production with biofloc system and zero-water exchange, by means of the response surfaces analysis. A 3 × 3 factorial experiment was...

Leachates are formed by the decomposition of solid waste contained in the final disposal site from liquids formed by precipitation or humidity in the area. Which, when filtered through waste, entrain substances in dissolved form and/or in suspension, creating a dark coloured liquid of variable characteristics and difficult to degrade, leading to co...

Coastal systems in Mexico shelter a variety of wildlife, the distribution of phytoplankton will depend on the relationship of physicochemical parameters, availability of nutrients and the presence of phytoplankton species that control primary productivity. The objective of this work was to determine the abundance of diatoms and dinoflagellates, and...

Harmful algal blooms (HABs) are natural events produced by massive concentration of toxic phytoplankton that can color red, ocher, brown or yellow large extensions of water, its intensity depends on the different species of phytoplankton involved in the proliferation. The spreading of these formations involves an interaction of biological, chemical...