Silvia Maribel contreras-Ramos

Silvia Maribel contreras-Ramos
Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco | CIATEJ · Environmental Technology unit

PhD

About

47
Publications
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Introduction
Silvia Maribel contreras-Ramos currently works at the Environmental Technology unit, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco. Silvia does research in Plant Fertilization, Animal and Human Nutrition, Environmental Science and Soil Science. Their current projects are focused in PGPR, biofertilizer, soil bioremediation and search about biotechnologic microbial potential.

Publications

Publications (47)
Poster
Full-text available
Colecciones de cepas de bacte-rias y hongos que pueden reducir el crecimiento de hongos fitopa-tógenos del género Fusarium en condiciones de laboratorio. Estas bacterias y hongos, identificados como Bacillus, Streptomyces o Trichoderma, son prometedores para el control biológico de Fusa-rium (Cuadro 1). El problema Los escarabajos barrenadores Eu-w...
Article
Full-text available
Tequila's increasing demand has led producers to develop faster production processes. There are two processes for sugar extraction in Tequila production: with or without cooking agave cores (TrP and NCP). Each process generates different vinasses. This work focuses on vinasses characterization from both Tequila production processes. First, we analy...
Article
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Ambrosia beetles and their symbiotic fungi are causing severe damage in natural and agro-ecosystems worldwide, threatening the productivity of several important tree crops such as avocado. Strategies aiming at mitigating their impact include the application of broad-spectrum agrochemicals and the incineration of diseased trees, but the increasing d...
Article
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Thalassobacillus is a moderately halophilic genus that has been isolated from several sites worldwide, such as hypersaline lakes, saline soils, salt flats, and volcanic mud. Halophilic bacteria have provided functional stable biomolecules in harsh conditions for industrial purposes. Despite its potential biotechnological applications, Thalassobacil...
Article
‘Los Negritos” is an extremophile geothermal site from Michoacan State, Mexico. Evidence of the diversity of its microbiota and its potential is still lacking. This study aimed to evaluate the bacterial communities by 16S metagenomics of the site and the potential of culturable bacteria isolated from the site by promoting growth plants (PGP) traits...
Article
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The dynamics of volatilomes emitted during the interaction between plant-growth-promoting bacteria (PGPB) and the phytopathogen Fusarium solani were evaluated for 5 days. The first screening was done to evaluate the antagonist activity of volatile compounds emitted by PGPB against F. solani. Volatilomes from 11 PGPB were determined individually and...
Article
The aims of this work were to screen isolated bacteria with a dual capacity: to inhibit Fusarium solani and to promote plant growth. Also, volatile compounds that would be responsible for that effect were identified. Seventy bacterial strains from the air, agricultural soils, hydrocarbons-contaminated soils, and extremophile soils were tested. The...
Article
Water scarcity and increasing salinity are the main limiting environmental factors directly affecting the establishment and development of agroecosystems. The objective of this study was to assess the capacity of the halophytes Bacopa monnieri (L.) Wettst and Sesuvium verrucosum Raf., to improve the chemical properties of a saline soil during a 240...
Article
Full-text available
Purpose The aim of this study was to evaluate the removal of total petroleum hydrocarbons (TPH), alkanes and polycyclic aromatic hydrocarbons (PAH). Materials and methods Using phytoremediation (Panicum maximum) (G), vermiremediation (Pontoscolex corethrurus) (E), and bioaugmentation (encapsulated bacterial consortium) (B), individually and in com...
Article
Full-text available
PurposeThe aim of this research was to determine the vinasse irrigation effects on the arbuscular mycorrhizal fungi (AMF) population (total spore abundance (TSA), richness, relative abundance, and diversity indices) and soil parameters and nutrients at high doses. The irrigation of soil with vinasses derived from sugarcane, beet, or alcohol product...
Article
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Cultivable halophilic microorganisms were isolated and identified from saline and alkaline-sodic soils: Cuatro Cienegas, Sayula and San Marcos lakes. Physicochemical characteristics of soils were determined to understand the relationship between those and the microorganisms isolated. The Cuatro Cienegas soils had a neutral pH, EC of 2.3–8 dS cm⁻¹,...
Article
Full-text available
Vinasses are the main byproducts of ethanol distillation and distilled beverages worldwide and are generated in substantial volumes. Tequila vinasses (TVs) could be used as a feedstock for biohydrogen production through a dark fermentative (DF) process due to their high content of organic matter. However, TV components have not been previously assa...
Article
Full-text available
The application of organic waste products, such as vinasses, to the soil is a common practice in different countries. Vinasses are a residual liquid generated during various processes such as ethanol production and beverages distillation. However, little is known about how the vinasses affect the content and species distribution of arbuscular mycor...
Article
Mexico is an oil producing country; the extraction of oil on land has left many sites with soil contaminated by oil spills. The aim of our study was to determine the impact of this contamination on the soil fauna; thus we compared the macro and mesofauna from a non contaminated soil to a moderately and highly polluted soil caused by oil extraction....
Article
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Aquatic weeds, such as Eichhornia crassipes (Mart.) Solms (water hyacinth) can be used as raw material for vermicompost. Vermicompost is the product of microbial decomposition of organic waste through the digestive tracts of earthworms. The aim of this work was to use water hyacinth to obtain stable and mature vermicompost. Three treatments were pe...
Article
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Vinasses are a residual liquid generated after the production of beverages, such as mezcal and tequila, from agave (Agave L.), sugarcane (Saccharum officinarum L.) or sugar beet (Beta vulgaris L.). These effluents have specific characteristics such as an acidic pH (from 3.9 to 5.1), a high chemical oxygen demand (50,000–95,000 mg L −1 ) and biologi...
Patent
Mezcla de la bacterias benéficas para las plantas, que mejoran la disposición de nutrientes del suelo hacia la planta lo cual se ha mostrado que incrementa el rendimiento de los cultivos en alrededor del 20-25%.
Article
Full-text available
Agave tequilana Weber is used to tequila and fructans production, with agave bagasse generated as a solid waste. The main use of bagasse is to produce compost in tequila factories with a long traditional composting that lasts 6-8 months. The aim of this study was to evaluate the degradation of agave bagasse by combining a pretreatment with fungi an...
Article
Full-text available
Tequila vinasses represent an acidic, highly concentrated pollutant effluent generated during the distillation step of Tequila production. Although acidogenesis of Tequila vinasses has been reported for some reactor configurations, a characterization of the bacteria present during this metabolic process is lacking in the literature. Hydraulic reten...
Chapter
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El objetivo de este capítulo es analizar la composición y características de los residuos generados durante la producción del tequila, particularmente las vinazas y el bagazo de agave, para dimensionar la problemática ambiental derivada del mal manejo y disposición final de estos residuos. Además, se presentan las posibles alternativas de tratamien...
Conference Paper
Full-text available
The Agave tequilana Weber is used to generate products such as tequila and fructans, in which agave bagasse is generated as solid waste. The principal use of bagasse is to produce composts in a traditional process of 7-month average. The aim of this study was to improve the agave bagasse degradation with an accelerated vermicomposting during 90 day...
Article
Full-text available
Earthworms can accelerate the removal of contaminants from soil. Earthworms change the physical and chemical properties of soil by mixing it with organic material and through their burrowing they improve aeration and render contaminants available for microorganisms. The presence of earthworms in contaminated soil indicate that they can survive a wi...
Article
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A greenhouse experiment was performed to test whether competition, and possibly allelopathy, were involved in Rottboellia cochinchinensis–maize interactions in two soil conditions: fertilized and unfertilized. Changes in morphological and physiological growth parameters for each species were determined by classical plant growth analysis. The dry we...
Article
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Vermicompost is typically applied to improve soil quality, but can be used to remediate hydrocarbon-contaminated soils. Little information is available on how contamination and subsequent bioremediation with vermicompost affects emissions of N2O and CO2, important greenhouse gases. A sandy loam soil with different water contents (40%, 60%, 80% and...
Article
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Animal fleshing (ANFL) is the predominant proteinaceous solid waste generated during processing of leather and it is confronting disposal problems. The aim of this study was to assess the potential of epigeic earthworm Eudrilus eugeniae to utilize and transform the fermented ANFL in the solid state (SSF) and submerged state (SmF) into a value added...
Article
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The effects of fermentation time and drying temperature on the profile of volatile compounds were evaluated after 2, 4, 6, and 8 fermentation days followed by drying at 60, 70 and 80°C. These treatments were compared with dry cocoa controls produced in a Samoa drier and by a sun-drying process. A total of 58 volatile compounds were identified by SP...
Article
Contamination of soil with hydrocarbons occurs frequently. Restoring contaminated soils is costly and time consuming. Earthworms accelerate the removal of hydrocarbons as they burrow through soil by rendering contaminants available for microbial degradation, by feeding on the organic matter that harbour contaminants, and by improving soil structure...
Article
Full-text available
Animal fleshing (ANFL) is the main solid waste generated during manufacturing leather, which should be disposed friendly to the environment. The effect of epigeic earthworm Eudrilus eugeniae (with and without addition) to transform fermented ANFL in solid state (SSF) and submerged state (SmF) mixed with cow dung and leaf litter into value added pro...
Article
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Earthworms can be used to remove polycyclic aromatic hydrocarbons (PAHs) from soil, but this might affect their survival and they might accumulate the contaminants. Sterilized and unsterilized soil was contaminated with phenanthrene (Phen), anthracene (Anth) and benzo(a)pyrene (BaP), added with or without Eisenia fetida, sewage sludge or vermicompo...
Article
Soils in Mexico are often contaminated with hydrocarbons and addition of waste water sludge and earthworms accelerates their removal. However, little is known how contamination and subsequent bioremediation affects emissions of N2O and CO2. A laboratory study was done to investigate the effect of waste water sludge and the earthworm Eisenia fetida...
Article
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Earthworms burrow through the soil thereby accumulating many lipophilic organic pollutants from the surrounding environment, so they could be used to remove polycyclic aromatic hydrocarbons (PAHs) from soil. Sterilized and unsterilized soil was contaminated with phenanthrene (Phen), anthracene (Anth) and benzo[a]pyrene (BaP), with or without added...
Article
Nitrogen mineralization in PAHs contaminated soil in presence of Eisenia fetida amended with biosolid or vermicompost was investigated. Sterilized and unsterilized soil was contaminated with PAHs, added with E. fetida and biosolid or vermicompost and incubated aerobically for 70 days, while dynamics of inorganic N were monitored. Addition of E. fet...
Article
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Phytoremediation is a cost-effective biotechnology for decontamination of polycyclic aromatic hydrocarbons (PAHs)-polluted soils. A greenhouse experiment was conducted to determine the growth of Mimosa monancistra, a N2-fixing leguminous plants, and its capacity to remove phenanthrene, anthracene, and benzo(a)pyrene (BaP)from soil. The PAHs decreas...
Article
The dissipation of three PAHs, i.e., 500 mg phenanthrene kg(-1) soil, 350 mg anthracene kg(-1) soil and 150 mg benzo(a)pyrene kg(-1) soil, was investigated in soil from Acolman (México) added with cow manure or vermicompost while production of CO(2) and inorganic N was monitored. At day 0, recovery of added phenanthrene was 95%, anthracene 96% and...
Article
Effluents from leather processing, a major industry that produces up to 64320 t wastewater year(-1) in the town of Leon (Guanajuato, Mexico), are normally discharged to the river Turbio without treatment. This water is downstream used to irrigate agricultural land. Tannery wastewater contains valuable nutrients, but also contaminants, such as salts...
Article
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The removal of phenanthrene, anthracene and benzo(a)pyrene added at three different concentrations was investigated with or without earthworms (Eisenia fetida) within 11 weeks. Average anthracene removal by the autochthonous micro-organisms was 23%, 77% for phenanthrene and 13% for benzo(a)pyrene, while it was 51% for anthracene, 47% for benzo(a)py...
Article
Full-text available
Biosolids, mainly from textile industries and the rest from households, were vermicomposted with Eisenia fetida, cow manure and oat straw for 2 months at three different moisture contents (60%, 70% and 80% dry weight base) in triplicate to reduce pathogens and toxic organic compounds, and to find the best medium for growth of E. fetida. The vermico...
Article
Wastewater from the leather industry in León (Guanajuato, México) is discharged into the Turbio river without treatment. Tannery wastewater contains utilizable nutrients, but also toxic organic compounds which might affect soil processes and plant growth, and pathogens, which might pose a threat to the local farming community. Tannery effluent was...
Article
Full-text available
Starch from banana (Musa paradisiaca L., var. Macho) was modified by acetylation and an alcoholic-alkaline treatment in order to evaluate its chemical composition and some of its functional properties, using corn starch as a control, to suggest its possible use in food preparation. The results showed that the granular cold-water soluble (GCWS) star...
Article
Full-text available
Starch from banana (Musa paradisiaca L., var. Macho) was modified by acetylation and an alcoholic-alkaline treatment in order to evaluate its chemical composition and some of its functional properties, using corn starch as a control, to suggest its possible use in food preparation. The results showed that the granular cold-water soluble (GCWS) star...
Article
Full-text available
Potato, corn and banana starches were blended in various combinations and ratios. Stability and clarity, freeze-thaw stability, water retention capacity and apparent viscosity of the pastes (prepared with a hydrothermic treatment using 100 degrees C for 30 min) were evaluated. In general, the samples stored at room temperature (28 degrees C) presen...
Article
Full-text available
Potato, corn and banana starches were blended in various combinations and ratios. Stability and clarity, freeze-thaw stability, water retention capacity and apparent viscosity of the pastes (prepared with a hydrothermic treatment using 100 AE C for 30 min) were evaluated. In general, the samples stored at room temperature (28 AE C) presented stabil...
Article
Full-text available
Banana native starch was acetylated and some of its functional properties were evaluated and compared to corn starch. In general, acetylated banana starch presented higher values in ash, protein and fat than corn acetylated starch. The modified starches had minor tendency to retrogradation assessed as % transmittance of starch pastes. At high tempe...

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