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Publications (77)
The Capsicum genus has significant economic importance since it is cultivated and consumed worldwide for its flavor and pungent properties. In 2021, Mexico produced 3.3 billion tons on 45,000 hectares which yielded USD 2 billion in exports to the USA, Canada, Japan, etc. Soil type has a dramatic effect on phosphorus (P) availability for plants due...
The Capsicum genus has significant economic importance since it is cultivated and consumed worldwide for its flavor and pungent properties. In 2021, Mexico produced 3.3 billion tons on 45,000 hectares which yielded USD 2 billion in exports to the USA, Canada, Japan, etc. Soil type has a dramatic effect on phosphorus (P) availability for plants due...
Methyl parathion (MP) is a highly toxic organophosphorus pesticide associated with water, soil, and air pollution events. The identification and characterization of microorganisms capable of biodegrading pollutants are an important environmental task for bioremediation of pesticide impacted sites. The strain Burkholderia cenocepacia CEIB S5-2 is a...
In this work, Opuntia fuliginosa and Agave angustifolia fibers were used as an alternative for the removal of heavy metals from water, through a biosorption process. Both species of plant are widely available in Mexico, particularly A. angustifolia as waste material from the production of tequila. First, both fibers were characterized by scanning e...
Vachellia campechiana (Mill Seigler & Ebinger) is widely distributed in Mexico and is a dominant species of tailings in Huautla, in the state of Morelos, Mexico. Mining activities carried out in this region generated about 780 thousand tons of bioavailable heavy metal waste (HMs) that were deposited in the environment without any treatment. This st...
Pesticides are xenobiotic molecules necessary to control pests in agriculture, home, and industry. However, water and soil can become contaminated as a consequence of their extensive use. Therefore, because of its eco-friendly characteristics and efficiency, bioremediation of contaminated sites is a powerful tool with advantages over other kinds of...
Burkholderia zhejiangensis CEIB S4-3 has the ability to degrade methyl parathion (MP) and its main hydrolysis byproduct p-nitrophenol (PNP). According to genomic data, several genes related with metabolism of MP and PNP were identified in this strain. However, the metabolic state of the strain during the MP degradation has not been evaluated. In th...
Background
The analysis of the negative effects of environmental metal pollution is complex and difficult to assess, because the great number of variables and levels of biological organization involved. Therefore, an integral interpretation of the structure of ecological interactions from the multifactorial toxicological vision can be achieved by t...
Heavy metals present in mine tailings pollute agroecosystems, put the integrity of the environment at risk and become a major route of exposure to humans. The present study was carried out in Taxco, Guerrero, Mexico, where millions of tons of mine tailings have been deposited. Soils from this region are used for agricultural activities. Maize (Zea...
After agriculture, mining is traditionally regarded as the oldest and the most important activity of the world. Throughout history, mining has had important contributions to the people and has become one of the most important economic primary activities in several countries. It is oriented to the search, exploitation, and use of the various mineral...
The DPSIR framework helps to identify and situate stressors, drivers and pressure variables within a dynamic environmental process composed of cause-effect relations. However, an important aspect related to its structural deficiency implies the use of unidirectional causalities between variables. In this work, we extend the capacities of the DPSIR...
Through the use of an enrichment technique, we isolated from the agricultural soils of Morelos in central México a strain of Burkholderia zhejiangensis identified as CEIB S4-3, it’s could use the pesticide methyl parathion (MP) as the only source of carbon and degrade completely p-nitrophenol (PNP). For more efficient MP and PNP degradation by the...
Biodegradation of some organochlorine and organophosphate pesticides is difficult because of their low solubility in water and, therefore, their low bioavailability. To overcome the hydrophobicity problem and the limited pesticide availability, biosurfactants play a major role. In this study we evaluated the effect of an extract from Pseudomonas sp...
Organophosphate pesticides are of great interest for research because they are currently the most commonly used pesticides. In this study, a bacterial strain capable of completely degrading methyl parathion (MP) was isolated from agricultural soils in central Mexico. This strain was designated strain S5-2 and was identified as Burkholderia cenocepa...
Description of the management of municipal solid waste in Mexico
Photocatalysis has shown the ability to inactivate a wide range of harmful microorganisms to traditional use of chlorination. Photocatalysis combined with applied bias potential (photoelectrocatalysis) increases the efficiency of photocatalysis and decreases the charge recombination. This work examines the inactivation of faecal coliform bacteria p...
Burkholderia cenocepacia
is an opportunistic pathogen that belongs to
Burkholderia cepacia
complex (BCC).
Burkholderia cenocepacia
strain CEIB S5-2 was isolated from agricultural soils in Morelos, Mexico, and previously has shown its abilities for bioremediation. In this study, we report the draft genome sequence of
Burkholderia cenocepacia
strain...
Arsenic (As) contaminated drinking water is a well-known problem that still affects
millions of people worldwide. Therefore, biomonitoring studies of human populations
exposed to arsenic via drinking water along with the search for new biomarkers become
important. Huautla, Morelos, Mexico, is a mining district where 780 000 tons of toxic
wastes hav...
En este capítulo se proporciona información acerca de la generación, el manejo y la disposición final de los residuos, incluyendo a los residuos sólidos urbanos (RSU) y a los residuos peligrosos. Además, se presenta la información acopiada acerca de la generación, manejo y tratamiento de las aguas residuales en México. Asimismo, se reportan las emi...
En este capítulo se proporciona información acerca de la generación, el manejo y la disposición final de los residuos, incluyendo a los residuos sólidos urbanos (RSU) y a los residuos peligrosos. Además, se presenta la información acopiada acerca de la generación, manejo y tratamiento de las aguas residuales en México. Asimismo, se reportan las emi...
En este capítulo se proporciona información acerca de la generación, el manejo y la disposición final de los residuos, incluyendo a los residuos sólidos urbanos (RSU) y a los residuos peligrosos. Además, se presenta la información acopiada acerca de la generación, manejo y tratamiento de las aguas residuales en México. Asimismo, se reportan las emi...
Background
Avian coccidiosis is a disease caused worldwide by several species of parasite Eimeria that causes significant economic losses. This disease affects chickens development and production, that most of times is controlled with anticoccidial drugs. Although efforts have been made to address this disease, they have been made to control Eimeri...
In this work, the greenhouse gas emission by municipal solid waste in Mexico is reported, the emissions of carbon dioxide (CO 2) and methane (CH 4) were identified using the Intergovernmental Panel on Climate Change (IPCC) methodology. The Greenhouse gas (GHG) emissions were reported as CO 2 equivalent units (CO 2 eq) for the period 1997-2010. The...
In this work, an analysis of the generation, composition and management of the urban solid waste in Mexico is described. Data were collected from the scientific literature and existing data bases at state and national levels. The municipal solid waste data collected from 1997 to 2012 reveal an increase in the amount of waste generated in Mexico of...
The Autonomous Morelos State University (UAEM for its acronym in Spanish), aware of the environmental and socioeconomic impact that its activities may cause, has assumed its responsibility on the environmental subject. With the institutionalization of the University Environmental Management Program (PROGAU for its acronym in Spanish), the UAEM has...
En este trabajo se analiza el Sistema Nacional de Ciencia, Tecnología e Innovación (SNCTI) y la forma en que influye en el desarrollo sustentable en México. Se aborda un aspecto histórico que data del año 1950, momento en el que se crea el Instituto Nacional de la Investigación Científica. Se reporta la evolución
del SNCTI que incluye su organizac...
An important use of environmental indicators is oriented to know their individual impact on the whole environment quality. Nevertheless, most of the important causes of environment affectations are derived from multiple interactions between indicators which correspond more specifically to the environmental reality. The affectations derived from int...
Burkholderia cenocepacia is considered an opportunistic pathogen from humans and may cause disease in plants. A bioprospection from a plaguicide-contaminated
agricultural field in Mexico identified several methyl parathion-degrading bacteria. Here, we report the draft genome sequence
of B. cenocepacia strain CEIB S5-1, which gave us clues into ecol...
We report the isolation of a bacterium from Galleria mellonella larva and its identification using genome sequencing and phylogenomic analysis. This bacterium was named Alcaligenes faecalis strain MOR02. Microscopic analyses revealed that the bacteria are located in the esophagus and intestine of the nematodes Steinernema feltiae, S. carpocapsae, a...
Figure S1: Graphical representation of a 5712 bp fragment from the contig1 showing the disposition of the transfers RNA genes tRNA-Val(gac) [121, 713-121, 789], tRNA-Leu(tag)[324, 903-324, 987], tRNA-Met(cat) [456, 223-456, 301] and tRNA Ala(tgc) [613, 447-613, 522], tRNA-Ile(gat) [613, 534-613, 610] in addition to the ribosomal genes 5S rRNA [609,...
In this work, an analysis of the generation, composition and management of the urban solid waste in Mexico and its relation to greenhouse gas emissions is described; as well a case study in More-los, a state in the central region of the country. Data were collected from the scientific literature and existing data bases at state and national levels....
Burkholderia species are widely distributed in the environment. A Burkholderia zhejiangensis strain was isolated from pesticide-contaminated soil from an agricultural field in Mexico and identified as an organophosphorus compound-degrading bacterium. In this study, we report the draft genome sequence of Burkholderia zhejiangensis strain CEIB S4-3....
Background: Morphological variability can lead to serious taxonomic problems in species with wide distribution ranges. Although morphological variability is partly due to ontogenetic programming, abiotic variables can also exert a significant effect on micro- and macromorphological characters. In this paper, we studied the morphological variability...
Los biosurfactantes (BS) son un grupo de moléculas de origen microbiano que se caracterizan por ser anfipáticas, es decir que sus moléculas presentan dos partes diferentes, una hidrofóbica y otra hidrofílica. Son un grupo estructuralmente diverso de moléculas tensoactivas, que presentan en general menor toxicidad y mayor biodegradabilidad que los s...
Endosulfan is an organochloride and persistent pesticide that has caused concern because of its impact in the environment and its toxicity to and bioaccumulation in living organisms. In this study, we isolated an endosulfan-degrading fungus from the activated sludge from an industrial wastewater treatment plant. Through repetitive enrichment and su...
The worldwide use of pesticides for pest control in agriculture and some industrial processes has contributed to improve the food and goods production. However, their intensive use has resulted in the release of a wide range of xenobiotic compounds to the environment, widespread among air, water, and soil. The existence
of contaminated sites is an...
La minería es una de las actividades económicas de mayor tradición en México, que contribuye al desarrollo económico del país suministrando insumos a una serie de industrias. Dentro de las tecnologías utilizadas en la
minería, la de cielo abierto (o de tajo abierto) es una actividad industrial de alto impacto ambiental, social y cultural; pero tamb...
Hydrogen (H2) is considered one of the most promising fuels for sustainable energy. Because nitrogenase produces H2 as a normal by-product, we tested the N2-fixing bacterial strains Burkholderia unamae and Burkholderia tropica to determine their H2 production capacities. To maximize H2 production, several culture conditions were tested and optimize...
The constant application of pesticides has led to environmental and health problems in many regions of the world, as well as the storage of large amounts of pesticide waste and obsolete pesticides. For this reason, it is necessary to develop strategies for the disposal of pesticides that are ecofriendly and economically viable. Different treatment...
The present study was carried out between May and June 2012 in the city of Cuernavaca, Mexico. During this time the average ambient temperatures were about 25˚C, suggesting the formation of secondary aerosols, consisting mainly of ammonium and sulfate. The average PM2.5 concentration was 37 µg·m −3 for the entire urban area and there were only two...
In this study, the authors report the first greenhouse gas emission inventory of Morelos, a state in central Mexico, in which the emissions of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) have been identified using the Intergovernmental Panel on Climate Change (IPCC) methodology. Greenhouse gas (GHG) emissions were estimated as CO2...
Pesticides are substances or mixtures of substances intended to prevent, destroy or control any pest, and they are widely used mainly in agriculture, industry and the domestic sector. These compounds have been extensively used for decades and have significantly increased food production. However, a large amount of applied pesticides often never rea...
The goal of this study was to optimize methyl parathion (O,O-dimethyl-O-4-p-nitrophenyl phosphorothioate) degradation using a strain of Escherichia coli DH5α expressing the opd gene. Our results indicate that this strain had lower enzymatic activity compared to the Flavobacterium sp. ATCC 27551 strain from which the opd gene was derived. Both strai...
Contamination with heavy metals is among the most hazardous environmental concerns caused by mining activity. A valuable tool for monitoring these effects is the use of sentinel organisms. Particularly, small mammals living inside mine tailings are an excellent study system because their analysis represents a realistic approach of mixtures and conc...
Microbial enzymes that can hydrolyze organophosphorus compounds have been isolated, identified and characterized from different microbial species in order to use them in biodegradation of organophosphorus compounds. We isolated a bacterial strain Cons002 from an agricultural soil bacterial consortium, which can hydrolyze methyl-parathion (MP) and o...
A tezontle-packed up-flow reactor (TPUFR) with an immobilized bacterial consortium for biological treatment of methyl-parathion and tetrachlorvinphos was evaluated. These organophosphate pesticides are widely used in Mexico for insect and mite control, respectively. With the aim of developing a tool for pesticide biodegradation, four flow rates (0....
El uso indiscriminado de plaguicidas en todo el mundo ha producido efectos en la salud humana y en la vida silvestre, muchas veces de carácter irreversible. En el sector ambiental, el uso generalizado de agroquímicos para controlar las plagas y proteger los cultivos ha sido asociado ampliamente con la contaminación de agua, suelo y alimentos; las a...
A bacterial consortium which degrades tetrachlorvinphos (phosphoric acid, 2chloro1(2,4,5trichlorophenyl) ethenyl dimethyl ester) was isolated from agricultural soil. This consortium was composed of six pure strains which were characterized based on their morphological and biochemical characteristics. The strains were presumptively identified as...
A bacterial consortium which degrades tetrachlorvinphos (phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl) ethenyl dimethyl ester) was isolated from agricultural soil. This consortium was composed of six pure strains which were characterized based on their morphological and biochemical characteristics. The strains were presumptively identified as...
Wastewater treatment is a priority at the global level, because it is important to have enough water of good quality, which will allow an improvement of environment, health and life quality. In Mexico, because of insufficient infrastructure, high costs, lack of maintenance and qualified staff, only 36 % of the generated wastewaters are treated, whi...
El tratamiento de las aguas residuales es una cuestión prioritaria a nivel mundial, ya que es importante disponer de agua de calidad y en cantidad suficiente, lo que permitirá una mejora del ambiente, la salud y la calidad de vida. En México, debido a la insuficiente infraestructura, los altos costos, la falta de mantenimiento y de personal capacit...
In order to remove methyl-parathion (MP) and tetrachlorvinphos (TCF), a bacterial consortium was immobilized with two supports consisting of alginate beads or stones of tezontle colonized by biofilm. Removal kinetics were recorded for suspended and immobilized consortium using a mineral salt medium supplemented with MP and TCF at 25mg/L and with 0....
Wastewater treatment is a priority at the global level, because it is important to have enough water of good quality, which will allow an improvement of environment, health and life quality. In Mexico, because of insufficient infrastructure, high costs, lack of maintenance and qualified staff, only 36 % of the generated wastewaters are treated, whi...
This study was carried out within the framework of a multidisciplinary project for evaluating buffer zones for combating pesticide contamination of surface water. Such areas are effective in removing pesticides transported by run-off; however, little information is available about the fate of the pesticides so intercepted. Two herbicides having con...
The aim of this study was to determine the influence of soil properties on ethyl-parathion toxicity to earthworms (Aporrectodea caliginosa) using different markers (mortality, cholinesterase (ChE) activity, body mass change and burrowing behaviour). In a first experiment, the toxicity of five different concentrations of ethyl-parathion was studied...
Ecotoxicological impacts of organic pesticides on soil and aquatic ecosystems depend primarily on their behavior in soils. Actual pesticide knowledge is mostly restricted to soils from temperate climates, whereas knowledge of pesticide behavior in tropical soils is scarce. Here, the sorption behavior of two organophosphorous insecticides, parathion...
This study was carried out within the framework of a multidisciplinary project for evaluating buffer zones for combating pesticide contamination of surface water. Such areas are effective in removing pesticides transported by run-off; however, little information is available about the fate of the pesticides so intercepted. Two herbicides having con...
The installation of vegetative buffer strips is one of the solutions proposed to combat pesticide pollution of surface water. These zones are effective in removing pesticides transported by runoff, but there is little information on what happens to the intercepted molecules. In this study, degradation of the herbicide isoproturon (IPU) [3-(4-isopro...
La instalación de zonas amortiguadoras es una de las soluciones propuestas para combatir la contaminación de aguas superficiales por plaguicidas. Estas zonas son eficaces para detener los plaguicidas transportados en las escorrentías pero no hay mucha información sobre el devenir de las moléculas interceptadas. En este trabajo se evaluó la degradac...
The biotransformation by Flavobacterium sp. of the following organophosphate pesticides was experimentally and theoretically studied: phorate, tetrachlorvinphos, methyl-parathion, terbufos, trichloronate, ethoprophos, phosphamidon, fenitrothion, dimethoate and DEF. The Flavobacterium sp. ATCC 27551 strain bearing the organophosphate-degradation gen...
A methyl-parathion degrading consortium of bacteria was isolated from agricultural soils in central Mexico (Morelos state), using methyl-parathion as the only carbon source. The ability of the consortium to degrade methyl-parathion, was assessed with a mineral medium containing 15 mg/L of pesticide; remnants concentration of methyl-parathion were m...
The land experiment was carried out with direct aplication of sewage sludge on soils. Sewage sludges and soils were analyzed chemically for organic matter, nitrogen, phosphorus, potasium, calcium, magnesium, iron, manganese, copper, zinc, cadmium, chromium, nickel and lead. Sewage sludges were evaluated for effectiveness in providing plant nutrient...
Los plaguicidas han tenido un desarrollo importante en el control de enfermedades y han influido en el desarrollo agrícola controlando insectos, hierbas y otras plagas que destruyen gran parte de los cultivos y compiten por factores como espacio, humedad y nutrimentos.
La instalación de zonas amortiguadoras es una de las soluciones propuestas para combatir la contaminación de aguas superficia- les por plaguicidas. Estas zonas son eficaces para detener los plaguicidas transportados en las escorrentías pero no hay mucha información sobre el devenir de las moléculas interceptadas. En este trabajo se evaluó la degrad...
RESUMEN Los sistemas de tratamiento de aguas residuales generan un subproducto llamado lodo residual. Existe una disyuntiva entre su tratamiento y disposición final, debido a su contenido de organismos patógenos y parásitos. Por lo tanto, su estabilización para disponerlos al ambiente es prioritaria, además su aplicación al suelo aporta nutrimentos...
