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Alma Hortensia Serafín Muñoz
Departamento de Ingeniería Ambiental, División de Ingenierías, Universidad de Guanajuato, Campus, Guanajuato 36000, Mexico

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Review
Published: 05 July 2021 in Sustainability
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The COVID-19 pandemic showed an impact mainly on the health of people and the economy of households. The levels of food security in the world’s households, especially in Mexico, have decreased. When people do not have food security, their health is compromised and they have financial problems; on the other hand, environmental deterioration has a link with food security. The purpose of this review is to analysis of the current situation in Mexico of food security, environmental health and economy, the main lessons learned in these areas and their proposals integrating public policies. A review was carried out in the main databases (MEDLINE, Embase, CINAHL Plus, Web of Science, CAB Abstracts y PAIS Index) with the following keywords and according to the MeSH terms: Food security, food insecurity, environmental health, public policies, environmental, production, integrating the word COVID-19 in English and Spanish. Only 44.5% of Mexican households presented food security. For food insecurity, 22.6% had moderate and severe food insecurity, while 32.9% had mild insecurity. Food insecurity and the health impacts of environmental origin (waste management during the coronavirus pandemic, water contaminated by bacteria, viruses, and toxins; air pollution) generates impacts on economic activity by not offering food that meets health regulations. Without the application of cost-effective measures and interventions for the prevention and control of patients with obesity, the direct costs for 2023 will amount to 9 million dollars, which worsens the household economy. Despite having laws and policies on the right to food, a healthy environment (water), and opportunities for economic growth, these human rights are not fulfilled. The conclusion is that it is necessary to use a health and agroecological model to promote public policies (health, environment, and economy) that aims to prevent the discussed issues, with multidisciplinary and intersectoral interventions (government, academia, researchers, civil society organizations, industry, and population). This upholds the human right that all people should enjoy an adequate, healthy environment and have access to high-quality food.

ACS Style

Rebeca Monroy-Torres; Ángela Castillo-Chávez; Erika Carcaño-Valencia; Marco Hernández-Luna; Alex Caldera-Ortega; Alma Serafín-Muñoz; Benigno Linares-Segovia; Karen Medina-Jiménez; Octavio Jiménez-Garza; Monserrat Méndez-Pérez; Sergio López-Briones. Food Security, Environmental Health, and the Economy in Mexico: Lessons Learned with the COVID-19. Sustainability 2021, 13, 7470 .

AMA Style

Rebeca Monroy-Torres, Ángela Castillo-Chávez, Erika Carcaño-Valencia, Marco Hernández-Luna, Alex Caldera-Ortega, Alma Serafín-Muñoz, Benigno Linares-Segovia, Karen Medina-Jiménez, Octavio Jiménez-Garza, Monserrat Méndez-Pérez, Sergio López-Briones. Food Security, Environmental Health, and the Economy in Mexico: Lessons Learned with the COVID-19. Sustainability. 2021; 13 (13):7470.

Chicago/Turabian Style

Rebeca Monroy-Torres; Ángela Castillo-Chávez; Erika Carcaño-Valencia; Marco Hernández-Luna; Alex Caldera-Ortega; Alma Serafín-Muñoz; Benigno Linares-Segovia; Karen Medina-Jiménez; Octavio Jiménez-Garza; Monserrat Méndez-Pérez; Sergio López-Briones. 2021. "Food Security, Environmental Health, and the Economy in Mexico: Lessons Learned with the COVID-19." Sustainability 13, no. 13: 7470.

Preprint content
Published: 15 June 2021
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The study of arsenic resistant microorganisms with high arsenic removal capacity is fundamental for the development of economically sustainable technologies for the treatment of water contaminated with this metalloid. In this work, the isolation and identification of 4 native strains was carried out.: Rhodococcus gordoniae, Microbacterium hydrocarbonoxydans, Exiguobacterium indicum and Pseudomonas kribbensis . R.gordoniae was identified as the bacterium with the highest growth capacity in both As(III) and As(V). E.indicum removed about 74.8% of Arsenate, As(V), and 61.7% of Arsenite , As(III), while R.gordoniae removed about 81.6 % of As(III), and 77.2% of As(V), while that M.hydrocarbonoxydans was able to remove up to 79.9% of As(III) and 68.9% of As(V). Finally, it was observed that P. kribbensis removed about 80.2% of As(V). This study also contributes to the possible detoxification mechanisms employed by these bacteria, the knowledge of which could be crucial in the successful implementation of in situ bioremediation programs.

ACS Style

Ulises Emiliano Rodriguez-Castrejón; Alma Hortensia Serafin-Muñoz; Aurelio Alvarez-Vargas; Gustavo Cruz Jimenez; Berenice Noriega-Luna. Isolation and Molecular identification of native As-resistant bacteria: As(III) and As(V) removal capacity and possible mechanism of detoxification. 2021, 1 .

AMA Style

Ulises Emiliano Rodriguez-Castrejón, Alma Hortensia Serafin-Muñoz, Aurelio Alvarez-Vargas, Gustavo Cruz Jimenez, Berenice Noriega-Luna. Isolation and Molecular identification of native As-resistant bacteria: As(III) and As(V) removal capacity and possible mechanism of detoxification. . 2021; ():1.

Chicago/Turabian Style

Ulises Emiliano Rodriguez-Castrejón; Alma Hortensia Serafin-Muñoz; Aurelio Alvarez-Vargas; Gustavo Cruz Jimenez; Berenice Noriega-Luna. 2021. "Isolation and Molecular identification of native As-resistant bacteria: As(III) and As(V) removal capacity and possible mechanism of detoxification." , no. : 1.

Preprint
Published: 14 April 2021
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In Mexico, it is estimated that due to the economic system the overexploitation of natural resources, environmental impacts and health have been generated, with high rates of overweight and obesity. This review analyzes the impacts on food safety, environmental health, and the economy in Mexico before and during the COVID-19 contingency. Derived from the analysis, among the lessons learned we can include: the health contingency due to COVID-19 had negative repercussions on food security, environmental health and the economy, which require the promotion of public policies (health, environment and economy) and migrate to a health prevention system and an agroecological model, which includes multidisciplinary and intersectoral interventions (government, academia, researchers, civil society organizations, business groups and citizens themselves) to reform and enforce the right to enjoy adequate food and a healthy environment. The contingency due to COVID19 has shown us that this must go from an ideology to being a reality and the lessons learned will have to focus on promoting an innovative and ethical culture of generating an economy, with a gender balance, resilience to climate change, management transparent technology and a priority in health and this will lead to progress in the food security of the population.

ACS Style

Rebeca Monroy-Torres; Erika Carcaño-Valencia; Marco Hernández-Luna; Alex Caldera-Ortega; Alma Serafín- Muñoz; Benigno Linares- Segovia; Karen Medina- Jiménez; Angela Castillo-Chávez; Octavio Jiménez-Garza; Monserrat Méndez- Pérez; Sergio López-Briones. Food Security, Environmental Health, and the Economy in Mexico: Lessons Learned with the COVID-19. 2021, 1 .

AMA Style

Rebeca Monroy-Torres, Erika Carcaño-Valencia, Marco Hernández-Luna, Alex Caldera-Ortega, Alma Serafín- Muñoz, Benigno Linares- Segovia, Karen Medina- Jiménez, Angela Castillo-Chávez, Octavio Jiménez-Garza, Monserrat Méndez- Pérez, Sergio López-Briones. Food Security, Environmental Health, and the Economy in Mexico: Lessons Learned with the COVID-19. . 2021; ():1.

Chicago/Turabian Style

Rebeca Monroy-Torres; Erika Carcaño-Valencia; Marco Hernández-Luna; Alex Caldera-Ortega; Alma Serafín- Muñoz; Benigno Linares- Segovia; Karen Medina- Jiménez; Angela Castillo-Chávez; Octavio Jiménez-Garza; Monserrat Méndez- Pérez; Sergio López-Briones. 2021. "Food Security, Environmental Health, and the Economy in Mexico: Lessons Learned with the COVID-19." , no. : 1.

Critical reviews
Published: 20 January 2021 in Nanotechnology for Environmental Engineering
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Nanoparticles (NPs) interact with living organisms through different pathways. These interactions depend on chemical nature of NPs, capping, and size, among others. In the last years, the use of different NPs for agricultural purposes has increased. Their applications mainly involve dosing though soil or foliar spraying. Different studies have indicated that NPs can be absorbed by plant roots or through foliar exposure, and may reach all plant organs including fruits, affecting their quality. In addition, they provide a route of exposure for humans and animals. Due to their physicochemical properties and high reactivity, NPs may influence basic cellular processes such as proliferation, metabolism, and death. In recent years, several studies have evaluated the effects of NPs applications, highlighting their capability to induce oxidative stress, interrupt the transport activity of the cell membrane of electrons/ions, cause oxidative damage, or modulating gene regulation. Given that risk assessment for conventional materials may not be applicable to nanomaterials (NMs), it is of great practical and scientific importance to study the safety of NMs for sustainable food production and consumer health protection. The present review intends to consolidate current knowledge on cellular and related interactions of NPs with plants. With this information we propose what we consider are relevant gaps to be filled in order to provide a more systemic picture of the above-mentioned interactions.

ACS Style

Guadalupe De La Rosa; Edgar Vázquez-Núñez; Carlos Molina-Guerrero; Alma H. Serafín-Muñoz; Ileana Vera-Reyes. Interactions of nanomaterials and plants at the cellular level: current knowledge and relevant gaps. Nanotechnology for Environmental Engineering 2021, 6, 1 -19.

AMA Style

Guadalupe De La Rosa, Edgar Vázquez-Núñez, Carlos Molina-Guerrero, Alma H. Serafín-Muñoz, Ileana Vera-Reyes. Interactions of nanomaterials and plants at the cellular level: current knowledge and relevant gaps. Nanotechnology for Environmental Engineering. 2021; 6 (1):1-19.

Chicago/Turabian Style

Guadalupe De La Rosa; Edgar Vázquez-Núñez; Carlos Molina-Guerrero; Alma H. Serafín-Muñoz; Ileana Vera-Reyes. 2021. "Interactions of nanomaterials and plants at the cellular level: current knowledge and relevant gaps." Nanotechnology for Environmental Engineering 6, no. 1: 1-19.

Journal article
Published: 11 December 2019 in Acta Universitaria
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La contaminación del agua por arsénico es un problema grave de salud pública a nivel mundial. El empleo de compuestos mesoporosos tipo hidrotalcitas (HT) es una opción eficiente y práctica para la adsorción de arsénico, debido a su alta tasa de remoción y bajo costo. Se sintetizó mediante el método de coprecipitación un hidróxido doble laminar Mg/Fe para la eliminación de arsénico en agua contaminada. Dicho sólido fue tratado a 100 °C y a 350 °C. El sólido se caracterizó por XRD y DSC-TGA. Se realizaron pruebas de eliminación de arsénico por contacto al equilibrio en sistema por lotes con soluciones sintéticas de arsénico y muestras de manantial. El sólido tratado térmicamente a 350 °C mostró la mejor capacidad de eliminación de arsénico, con capacidad de adsorción de 447.7 mg de arsénico por g de adsorbente en un tiempo de 180 min. Esta capacidad se atribuye a la modificación estructural por el tratamiento térmico.

ACS Style

Jose Ignacio Ceseña Quiñonez; Esthela Ramos Ramírez; Alma Hortensia Serafín Muñoz; Joel Moreno Palmerin; Gabriela Ana Zanor; Norma Leticia Gutiérrez Ortega. Remoción de arsénico del agua para consumo humano empleando un hidróxido doble laminar Mg/Fe. Acta Universitaria 2019, 29, 1 -12.

AMA Style

Jose Ignacio Ceseña Quiñonez, Esthela Ramos Ramírez, Alma Hortensia Serafín Muñoz, Joel Moreno Palmerin, Gabriela Ana Zanor, Norma Leticia Gutiérrez Ortega. Remoción de arsénico del agua para consumo humano empleando un hidróxido doble laminar Mg/Fe. Acta Universitaria. 2019; 29 ():1-12.

Chicago/Turabian Style

Jose Ignacio Ceseña Quiñonez; Esthela Ramos Ramírez; Alma Hortensia Serafín Muñoz; Joel Moreno Palmerin; Gabriela Ana Zanor; Norma Leticia Gutiérrez Ortega. 2019. "Remoción de arsénico del agua para consumo humano empleando un hidróxido doble laminar Mg/Fe." Acta Universitaria 29, no. : 1-12.

Journal article
Published: 29 April 2019 in Catalysts
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Catalyst-type mixed metal oxides with different compositions and Co/Fe ratios were obtained from layered double hydroxides to be used as heterogeneous catalysts in the production of biodiesel. The effect of the Co/Fe ratio on the precursors of the catalysts was analyzed, considering their thermal, textural and structural properties. The physicochemical properties of the catalysts were determined by thermogravimetric analysis (differential scanning calorimetry and thermogravimetric), X-ray diffraction, Fourier-transform infrared spectroscopy, Scanning Electron Microscopy-Energy Dispersive X-ray spectroscopy and N2-physisorption. The conversion to biodiesel using the different catalysts obtained was determined by diffuse reflectance infrared Fourier-transform spectroscopy and 1H-Nuclear magnetic resonance spectroscopy, allowing us to correlate the effect of the catalyst composition with the catalytic capacity. The conditions for obtaining biodiesel were optimized by selecting the catalyst and varying the percentage of catalyst, the methanol/oil ratio and the reaction time. The catalysts reached yields of conversion to biodiesel of up to 96% in 20 min of reaction using only 2% catalyst. The catalyst that showed the best catalytic activity contains a mixture of predominant crystalline and amorphous phases of CoFe2O4 and NaxCoO2. The results suggest that cobalt is a determinant in the activity of the catalyst when forming active sites in the crystalline network of mixed oxides for the transesterification of triglycerides, with high conversion capacity and selectivity to biodiesel.

ACS Style

Norma Gutiérrez-Ortega; Esthela Ramos-Ramírez; Alma Serafín-Muñoz; Adrián Zamorategui-Molina; Jesús Monjaraz-Vallejo. Use of Co/Fe-Mixed Oxides as Heterogeneous Catalysts in Obtaining Biodiesel. Catalysts 2019, 9, 403 .

AMA Style

Norma Gutiérrez-Ortega, Esthela Ramos-Ramírez, Alma Serafín-Muñoz, Adrián Zamorategui-Molina, Jesús Monjaraz-Vallejo. Use of Co/Fe-Mixed Oxides as Heterogeneous Catalysts in Obtaining Biodiesel. Catalysts. 2019; 9 (5):403.

Chicago/Turabian Style

Norma Gutiérrez-Ortega; Esthela Ramos-Ramírez; Alma Serafín-Muñoz; Adrián Zamorategui-Molina; Jesús Monjaraz-Vallejo. 2019. "Use of Co/Fe-Mixed Oxides as Heterogeneous Catalysts in Obtaining Biodiesel." Catalysts 9, no. 5: 403.

Research article
Published: 02 December 2018 in Advances in Materials Science and Engineering
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A gallery of hydrotalcite-type mesoporous materials with different Mg/Al molar ratios were synthesized by the coprecipitation method. The materials were activated by heat treatment to test their activity in the photodegradation of 2,4,6-trichlorophenol under UV light irradiation. The physicochemical properties of the different synthesized and activated materials were determined using XRD, physical adsorption/desorption of N2, FTIR, SEM, DTA, and TGA. Their banned band energy was determined by UV-Vis to identify their potential to be used as a semiconductor in catalytic photodegradation processes. The results of photodegradation tests of 2,4,6-trichlorophenol showed that hydrotalcites have a high degradation capacity, up to 100% for the catalyst of Mg/Al ratio = 2, with a high mineralization capacity of 80%. The degradation capacity of most of the catalysts tested is mainly due to the presence of holes and the formation of superoxide free radicals, which are the determining species within the degradation mechanism.

ACS Style

Esthela Ramos-Ramírez; Norma Gutiérrez-Ortega; Francisco Tzompantzi; Claudia M. Gómez; Gloria Del Angel; Gabriel Herrera-Pérez; Alma Hortensia Serafin Muñoz; Clara Tzompantzi-Flores. Activated Hydrotalcites Obtained by Coprecipitation as Photocatalysts for the Degradation of 2,4,6-Trichlorophenol. Advances in Materials Science and Engineering 2018, 2018, 1 -15.

AMA Style

Esthela Ramos-Ramírez, Norma Gutiérrez-Ortega, Francisco Tzompantzi, Claudia M. Gómez, Gloria Del Angel, Gabriel Herrera-Pérez, Alma Hortensia Serafin Muñoz, Clara Tzompantzi-Flores. Activated Hydrotalcites Obtained by Coprecipitation as Photocatalysts for the Degradation of 2,4,6-Trichlorophenol. Advances in Materials Science and Engineering. 2018; 2018 ():1-15.

Chicago/Turabian Style

Esthela Ramos-Ramírez; Norma Gutiérrez-Ortega; Francisco Tzompantzi; Claudia M. Gómez; Gloria Del Angel; Gabriel Herrera-Pérez; Alma Hortensia Serafin Muñoz; Clara Tzompantzi-Flores. 2018. "Activated Hydrotalcites Obtained by Coprecipitation as Photocatalysts for the Degradation of 2,4,6-Trichlorophenol." Advances in Materials Science and Engineering 2018, no. : 1-15.

Original paper
Published: 16 February 2018 in Waste and Biomass Valorization
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The chemical pretreatment of biomass has been integrated with enzyme production through the recycling of aqueous fractions. Alkaline/H2O2 delignification of corn straw (CS) was performed to obtain a 75.1% w/w cellulose solid fraction and to dissolve 93.4 and 83.5%, of the original lignin and hemicelluloses, respectively. Next, a Pleurotus cystidiosus native strain was left to grow for 120 h in the resulting liquid fraction. After filtering the cells, the liquid medium was used alone or combined with the commercial enzyme. To reduce chemical and water usage, the liquid fraction from pretreatment was recycled to perform another treatment; the pH, CS, and H2O2 were adjusted. A process integrated with P. cystidiosus was grown again and enzymatic hydrolysis was realized. Samples of every liquid fraction from the fungal growing medium were analyzed to determine the chemical oxygen demand (OCD), glucose (Glu), xylose (Xyl), and total reducing sugars (RS). Separately, to obtain valuable polymers from this integration process, solid hemicellulose and lignin were isolated from the remaining liquid fractions through pH variation. The composition of the samples was determined using scanning electron microscopy (SEM), optical stereoscopic microscopy and Fourier transform infrared spectroscopy (FT-IR) and was compared with commercial homologs. The maximum conversion of cellulose to glucose by the obtained liquid fraction of the fungal medium was 61.3 ± 0.9% of the theoretical conversion yield of the commercial enzyme. Similarly, the conversion of hemicelluloses to xylose was 69.5 ± 1.5%. Finally, in this work, an integrated platform for cellulose, hemicellulose, lignin, enzymatic extract and sugars production, which also significantly reduces water consumption, was proposed.

ACS Style

Alma Hortensia Serafín Muñoz; Carlos Eduardo Molina Guerrero; Norma Leticia Gutierrez Ortega; Julio Cesar Leal Vaca; Aurelio Alvarez Vargas; Carmen Cano Canchola. Characterization and Integrated Process of Pretreatment and Enzymatic Hydrolysis of Corn Straw. Waste and Biomass Valorization 2018, 10, 1857 -1871.

AMA Style

Alma Hortensia Serafín Muñoz, Carlos Eduardo Molina Guerrero, Norma Leticia Gutierrez Ortega, Julio Cesar Leal Vaca, Aurelio Alvarez Vargas, Carmen Cano Canchola. Characterization and Integrated Process of Pretreatment and Enzymatic Hydrolysis of Corn Straw. Waste and Biomass Valorization. 2018; 10 (7):1857-1871.

Chicago/Turabian Style

Alma Hortensia Serafín Muñoz; Carlos Eduardo Molina Guerrero; Norma Leticia Gutierrez Ortega; Julio Cesar Leal Vaca; Aurelio Alvarez Vargas; Carmen Cano Canchola. 2018. "Characterization and Integrated Process of Pretreatment and Enzymatic Hydrolysis of Corn Straw." Waste and Biomass Valorization 10, no. 7: 1857-1871.

Journal article
Published: 23 July 2016 in Clean Technologies and Environmental Policy
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One of the main concerns of humankind in the last years is the availability of energy sources. Research has been focused on finding clean and renewable ways to satisfy the energy demand worldwide. In the particular case of the state of Guanajuato, Mexico, clay industry burns each year about 15,000 m3 of fuel oil and residual oils, and 96,000 t of wood derivatives. As a way to reduce the environmental impact of clay industry, the use of solid fuel pellets, obtained from vegetable residual material, is proposed. The raw material for the pellets is obtained from agribusiness and from the cities of the state. The solid biofuel has high density, low content of humidity, a homogeneous shape and high energy density. Nevertheless, special care must be taken about the location of the production facility and hubs, in order to make the production of the biofuel economically feasible. Furthermore, to have an environmentally friendly fuel, the supply chain and the production process must minimize the global environmental impact. In this work, a mathematical programming model is proposed to determinate the optimal location of the production facilities, the hubs, and the best distribution logistics. The problem is modelled using a general disjunctive programming approach, and then relaxed into a mixed-integer non-linear programming (MINLP) problem. It has been determined that the main plant should be located in the city of Irapuato, while secondary plants must be established in the cities of León, Irapuato, Abasolo and Salamanca. Moreover, it has been estimated that, when the residual biomass is converted into pellets, about 72,548 t/year of equivalent CO2 are avoided in the main plant, together with 24,182 of equivalent CO2 avoided per secondary facility.

ACS Style

Manuel Alejandro Méndez-Vázquez; Fernando Israel Gómez-Castro; José María Ponce-Ortega; Alma Hortensia Serafín-Muñoz; José Ezequiel Santibañez-Aguilar; Mahmoud M. El-Halwagi. Mathematical optimization of a supply chain for the production of fuel pellets from residual biomass. Clean Technologies and Environmental Policy 2016, 19, 721 -734.

AMA Style

Manuel Alejandro Méndez-Vázquez, Fernando Israel Gómez-Castro, José María Ponce-Ortega, Alma Hortensia Serafín-Muñoz, José Ezequiel Santibañez-Aguilar, Mahmoud M. El-Halwagi. Mathematical optimization of a supply chain for the production of fuel pellets from residual biomass. Clean Technologies and Environmental Policy. 2016; 19 (3):721-734.

Chicago/Turabian Style

Manuel Alejandro Méndez-Vázquez; Fernando Israel Gómez-Castro; José María Ponce-Ortega; Alma Hortensia Serafín-Muñoz; José Ezequiel Santibañez-Aguilar; Mahmoud M. El-Halwagi. 2016. "Mathematical optimization of a supply chain for the production of fuel pellets from residual biomass." Clean Technologies and Environmental Policy 19, no. 3: 721-734.

Book chapter
Published: 01 January 2016 in Computer Aided Chemical Engineering
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ACS Style

M.A. Méndez-Vázquez; Fernando Israel Gómez Castro; J.M. Ponce-Ortega; A.H. Serafín-Muñoz; J.E. Santibañez-Aguilar; M.M. El-Halwagi. Mathematical Optimization of the Production of Fuel Pellets from Residual Biomass. Computer Aided Chemical Engineering 2016, 133 -138.

AMA Style

M.A. Méndez-Vázquez, Fernando Israel Gómez Castro, J.M. Ponce-Ortega, A.H. Serafín-Muñoz, J.E. Santibañez-Aguilar, M.M. El-Halwagi. Mathematical Optimization of the Production of Fuel Pellets from Residual Biomass. Computer Aided Chemical Engineering. 2016; ():133-138.

Chicago/Turabian Style

M.A. Méndez-Vázquez; Fernando Israel Gómez Castro; J.M. Ponce-Ortega; A.H. Serafín-Muñoz; J.E. Santibañez-Aguilar; M.M. El-Halwagi. 2016. "Mathematical Optimization of the Production of Fuel Pellets from Residual Biomass." Computer Aided Chemical Engineering , no. : 133-138.

Journal article
Published: 01 September 2013 in Bulletin of Environmental Contamination and Toxicology
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Arsenic release from the abandoned mines and its fate in a local stream were studied. Physicochemical parameters, metals/metalloids and arsenic species were determined. One of the mine drainages was found as a point source of contamination with 309 μg L−1 of dissolved arsenic; this concentration declined rapidly to 10.5 μg L−1 about 2 km downstream. Data analysis confirmed that oxidation of As(III) released from the primary sulfide minerals was favored by the increase of pH and oxidation reduction potential; the results obtained in multivariate approach indicated that self-purification of water was due to association of As(V) with secondary solid phase containing Fe, Mn, Ca.

ACS Style

Yann Rene Ramos Arroyo; Alma Hortensia Serafin Muñoz; Eunice Yanez Barrientos; Irais Rodriguez Huerta; Kazimierz Wrobel; Katarzyna Wrobel. Natural Decrease of Dissolved Arsenic in a Small Stream Receiving Drainages of Abandoned Silver Mines in Guanajuato, Mexico. Bulletin of Environmental Contamination and Toxicology 2013, 91, 539 -544.

AMA Style

Yann Rene Ramos Arroyo, Alma Hortensia Serafin Muñoz, Eunice Yanez Barrientos, Irais Rodriguez Huerta, Kazimierz Wrobel, Katarzyna Wrobel. Natural Decrease of Dissolved Arsenic in a Small Stream Receiving Drainages of Abandoned Silver Mines in Guanajuato, Mexico. Bulletin of Environmental Contamination and Toxicology. 2013; 91 (5):539-544.

Chicago/Turabian Style

Yann Rene Ramos Arroyo; Alma Hortensia Serafin Muñoz; Eunice Yanez Barrientos; Irais Rodriguez Huerta; Kazimierz Wrobel; Katarzyna Wrobel. 2013. "Natural Decrease of Dissolved Arsenic in a Small Stream Receiving Drainages of Abandoned Silver Mines in Guanajuato, Mexico." Bulletin of Environmental Contamination and Toxicology 91, no. 5: 539-544.

Journal article
Published: 31 May 2007 in Mycological Research
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The effect of two inorganic selenium forms has been investigated in the mycelia of Pleurotus ostreatus exposed to cadmium and silver salts in the shaken cultures. The degree of toxicity was assessed by the determination of malondialdehyde (MDA; a common biomarker of lipid peroxidation). The mycelia were exposed to one element form (up to 5 mg l−1) and also to the following combinations: cadmium(II) + selenium(IV); cadmium(II) + selenium(VI); silver(I) + selenium(IV); silver(I) + selenium(VI). The concentrations of cadmium, silver, selenium, and MDA were assessed in the mixed cytosol and cell membrane fractions (CCM). A positive correlation between MDA and cadmium was found in the CCM (β = 0.7775, P = 0.0001), whereas the effect of silver was less significant (β = 0.4642, P = 0.039). These results indicate that silver(I) and cadmium(II) have different capacities to induce lipid peroxidation in P. ostreatus. The protective role of selenium against metal-induced oxidative damage was found to be dependent on the oxidation state of the element form in the growth medium. The strongest beneficial effect was observed in mycelia exposed to cadmium(II) + selenium(IV) (inverse correlation between MDA and selenium in the CCM: β = −0.7129, P = 0.009) and it has been ascribed to a lower incorporation of the toxic metal and/or to possible intracellular interaction between selenium and cadmium. Under exposure to silver(I), the protective effect of selenium(IV) was less noticeable (correlation between MDA and selenium in the CCM; β = −0.6068, P = 0.036); in the presence of selenium(VI), no beneficial effect was observed.

ACS Style

Alma Hortensia Serafín Muñoz; Kazimierz Wrobel; J. Felix Gutierrez Corona; Katarzyna Wrobel. The protective effect of selenium inorganic forms against cadmium and silver toxicity in mycelia of Pleurotus ostreatus. Mycological Research 2007, 111, 626 -632.

AMA Style

Alma Hortensia Serafín Muñoz, Kazimierz Wrobel, J. Felix Gutierrez Corona, Katarzyna Wrobel. The protective effect of selenium inorganic forms against cadmium and silver toxicity in mycelia of Pleurotus ostreatus. Mycological Research. 2007; 111 (5):626-632.

Chicago/Turabian Style

Alma Hortensia Serafín Muñoz; Kazimierz Wrobel; J. Felix Gutierrez Corona; Katarzyna Wrobel. 2007. "The protective effect of selenium inorganic forms against cadmium and silver toxicity in mycelia of Pleurotus ostreatus." Mycological Research 111, no. 5: 626-632.

Journal article
Published: 01 May 2006 in Journal of Agricultural and Food Chemistry
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The incorporation of Se to fungi has been studied, focusing on element distribution among different cellular compartments and, in particular, polysaccharide structures contained in cell walls. Se-enriched mycelia of Pleurotus ostreatus were obtained in submerged cultures. The incorporation of selenium from the growth medium to mycelia was observed with the relative distribution between cytosol plus cell membranes fraction (CCM) and cell walls fraction (CW) of about 44 and 56%, respectively. CCM fractions were analyzed by size exclusion chromatography with on-line UV (280 nm) and ICP-MS detection (80Se). The results obtained showed selenium binding to components of different molecular masses (about 24% of total selenium coeluted with the compounds of molecular mass > 10 kDa). A polysaccharide-containing fraction of mycelia was treated alternatively with Tris-HCl at pH 7.5 or with chitinase. Better solubility and increased contribution of low molecular mass compounds were observed in chitinase extracts (UV detection), confirming the degradation of polysacharides by the enzyme. The total area under the ICP-MS chromatogram of chitinase extract was 2 times higher with respect to the area for Tris-HCl extract. Furthermore, the relative contribution of selenium in the low molecular mass fraction (molecular mass < 1 kDa) in chitinase extract was 72% as compared to 45% in Tris-HCl extract (based on peak area measurements with respect to total area under the chromatogram). The results obtained suggest selenium binding to chitin-containing polysaccharide structures in fungi cell walls.

ACS Style

Alma Hortensia Serafín Muñoz; Kevin Kubachka; Kazimierz Wrobel; J. Felix Gutierrez Corona; Santha K. V. Yathavakilla; Joseph A. Caruso; Katarzyna Wrobel. Se-Enriched Mycelia ofPleurotus ostreatus: Distribution of Selenium in Cell Walls and Cell Membranes/Cytosol. Journal of Agricultural and Food Chemistry 2006, 54, 3440 -3444.

AMA Style

Alma Hortensia Serafín Muñoz, Kevin Kubachka, Kazimierz Wrobel, J. Felix Gutierrez Corona, Santha K. V. Yathavakilla, Joseph A. Caruso, Katarzyna Wrobel. Se-Enriched Mycelia ofPleurotus ostreatus: Distribution of Selenium in Cell Walls and Cell Membranes/Cytosol. Journal of Agricultural and Food Chemistry. 2006; 54 (9):3440-3444.

Chicago/Turabian Style

Alma Hortensia Serafín Muñoz; Kevin Kubachka; Kazimierz Wrobel; J. Felix Gutierrez Corona; Santha K. V. Yathavakilla; Joseph A. Caruso; Katarzyna Wrobel. 2006. "Se-Enriched Mycelia ofPleurotus ostreatus: Distribution of Selenium in Cell Walls and Cell Membranes/Cytosol." Journal of Agricultural and Food Chemistry 54, no. 9: 3440-3444.

Journal article
Published: 01 June 2005 in Journal of Agricultural and Food Chemistry
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Huitlacoche is the ethnic name of the young fruiting bodies of Ustilago maydis, a common parasite of maize. In Mexico and other Latin American countries, this fungus has been traditionally appreciated as a local delicacy. In this work a metallomics approach was used with the determination of eight elements in huitlacoche by electrothermal atomic absorption spectrometry as one facet of this approach. The results obtained indicated relatively lower concentrations of commonly analyzed metals, as referred to the data reported for other mushroom types. This effect was ascribed to different accessibilities of elements, depending on fungus substrate (lower from plant than from soil). Subcellular fractionation was accomplished by centrifugation of cell homogenates suspended in Tris-HCl buffer. Recoveries of the fractionation procedure were in the range of 71-103%. For six elements (Cr, Cu, Fe, Mn, Ni, and Pb), the mean relative contributions in cytosol, cell walls, and mixed membrane fraction were 50.7, 48.2, and 1.1% respectively. To attain the molecular weight distribution of compounds containing target elements as an additional aspect of the metallomics approach, the fungus extract (1% sodium dodecyl sulfate in Tris-HCl, 30 mmol L(-)(1), pH 7.0) was analyzed by size exclusion chromatography with UV and ICP-MS detection. With spectrophotometric detection (280 nm), the elution of high molecular weight compounds was observed in the form of one peak (MW > 10 kDa), and several lower peaks appeared at higher retention times (MW < 10 kDa). On ICP-MS chromatograms, a coelution of (59)Co, (63)Cu, (57)Fe, (202)Hg, (60)Ni, and (80)Se with the first peak on the UV chromatogram was clearly observed, indicating that a fraction of each element incorporated with high molecular weight compounds (12.7, 19.8, 33.7, 100, 19.4, and 45.8%, respectively, based on the peak area measurements). From a comparison of (80)Se and (33)S chromatograms (for sulfur analysis, the extract was obtained in the absence of SDS), both elements coeluted with the first UV peak, but their lower molecular weight compounds were apparently different. These findings may contribute to a better understanding of the accumulation of elements in mushrooms.

ACS Style

Alma Hortensia Serafín Muñoz; Kevin Kubachka; Kazimierz Wrobel; Felix Gutierrez Corona; Santha K. V. Yathavakilla; Joseph A. Caruso; Katarzyna Wrobel. Metallomics Approach to Trace Element Analysis inUstilago maydisUsing Cellular Fractionation, Atomic Absorption Spectrometry, and Size Exclusion Chromatography with ICP-MS Detection. Journal of Agricultural and Food Chemistry 2005, 53, 5138 -5143.

AMA Style

Alma Hortensia Serafín Muñoz, Kevin Kubachka, Kazimierz Wrobel, Felix Gutierrez Corona, Santha K. V. Yathavakilla, Joseph A. Caruso, Katarzyna Wrobel. Metallomics Approach to Trace Element Analysis inUstilago maydisUsing Cellular Fractionation, Atomic Absorption Spectrometry, and Size Exclusion Chromatography with ICP-MS Detection. Journal of Agricultural and Food Chemistry. 2005; 53 (13):5138-5143.

Chicago/Turabian Style

Alma Hortensia Serafín Muñoz; Kevin Kubachka; Kazimierz Wrobel; Felix Gutierrez Corona; Santha K. V. Yathavakilla; Joseph A. Caruso; Katarzyna Wrobel. 2005. "Metallomics Approach to Trace Element Analysis inUstilago maydisUsing Cellular Fractionation, Atomic Absorption Spectrometry, and Size Exclusion Chromatography with ICP-MS Detection." Journal of Agricultural and Food Chemistry 53, no. 13: 5138-5143.

Journal article
Published: 01 January 2005 in Biological Trace Element Research
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In this work, the distribution of nine metals in two types of cultivated mushroom had been investigated. For Agaricus bisporus, the biomass was separated into caps and stalks, and for Pleurotus ostreatus, the entire mushrooms were taken for analysis. Electrothermal atomic absorption spectrometry was used for total element determination in acid digests. For accuracy checking, the certified reference material (NIST 1,571, citrus leaves) was analyzed. The results obtained for the two fungi species were within the ranges of concentration reported previously by other authors. Subcellular fractionation was accomplished by centrifugation of cell homogenates, which had been suspended in Tris-HCl buffer. In the first centrifugation (7,300 g, 4 degrees C, 10 min), cell walls were separated (pellet I), and the second centrifugation (147,000g, 4 degrees C, 60 min) yielded mixed membrane fraction (pellet II) and cytosol (supernatant II). Recoveries of the fractionation procedure were in the range 70--100% (with the exception of Fe). For all elements studied, the highest relative contributions were found in cytosol fractions of the fruiting bodies (63--72%, 49--76%, 44--93%, 26--87 pc, 55--85%, 50--68%, 41--78%, 39--78%, 54--67% respectively for Al, Bi, Cd, Cr, Cu, Fe, Mn, Ni, and Pb. Lower contributions were found in cell walls (respectively 22--32%, 24--44%, 6.1--47%, 12--52%, 7.3-- 37%, 7.9--32%, 19--52%, 20--42%, and 25--38%) and only minute amounts in the mixed membrane fraction (3.0--5.8%, 0.7--7.0%, 0.7--8.3%, 1.0--22%, 7.5--14%, 16--24%, 1.1--19%, and 5.1--7.7%). The results obtained indicate that small water-soluble molecules were the primary forms of nine elements in two mushroom species studied. On the other hand, the evidence has been provided on elements binding to larger, water-insoluble molecules contained in the structures of cell wall and membranes. The relative distribution was both element and fungi dependent. Thus, in P. ostreatus, total element levels were higher than in A. bisporus, with the preference for their accumulation in cytosol. On the contrary, total element content in the latter fungi was lower; however, a clear tendency toward more efficient element incorporation to the water-insoluble structures was observed (no apparent differences between stalks and caps).

ACS Style

Alma Hortensia Serafin Muñoz; Felix Gutierrez Corona; Kazimierz Wrobel; Gerardo Martínez Soto; Katarzyna Wrobel. Subcellular Distribution of Aluminum, Bismuth, Cadmium, Chromium, Copper, Iron, Manganese, Nickel, and Lead in Cultivated Mushrooms (Agaricus bisporus and Pleurotus ostreatus). Biological Trace Element Research 2005, 106, 265 -278.

AMA Style

Alma Hortensia Serafin Muñoz, Felix Gutierrez Corona, Kazimierz Wrobel, Gerardo Martínez Soto, Katarzyna Wrobel. Subcellular Distribution of Aluminum, Bismuth, Cadmium, Chromium, Copper, Iron, Manganese, Nickel, and Lead in Cultivated Mushrooms (Agaricus bisporus and Pleurotus ostreatus). Biological Trace Element Research. 2005; 106 (3):265-278.

Chicago/Turabian Style

Alma Hortensia Serafin Muñoz; Felix Gutierrez Corona; Kazimierz Wrobel; Gerardo Martínez Soto; Katarzyna Wrobel. 2005. "Subcellular Distribution of Aluminum, Bismuth, Cadmium, Chromium, Copper, Iron, Manganese, Nickel, and Lead in Cultivated Mushrooms (Agaricus bisporus and Pleurotus ostreatus)." Biological Trace Element Research 106, no. 3: 265-278.

Journal article
Published: 02 November 2004 in Microchimica Acta
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Malondialdehyde (MDA) is a widely accepted biomarker of lipid peroxidation. Thus, the measurement of MDA in clinical samples is useful in the evaluation of oxidative stress. In this study, a micro-extraction-spectrophotometric assay was developed, based on the formation of MDA–thiobarbituric acid (TBA) adduct. To enhance the analytical performance, Erioglaucine A was used as an internal standard (IS), and the first derivative spectra were obtained. The volume of serum sample was 20 µL and the total volume of aqueous phase 420 µL (200 µL of 0.6% TBA in acetic acid, pH 2.5 and 200 µL of 6.25·10 −4% IS). The extraction of adduct and IS was carried out with 300 µL of aliquat 336 (0.06%) in ethyl acetate. The analytical signal S was defined as the ratio between the first derivative absorbances measured at 543.1 nm (adduct) and 644.4 nm (IS). In the calibration range up to 10 µmol L −1 MDA, the linear regression coefficient was 0.9998. The quantification limit was 0.19 µmol L −1 and the CV values for 2 µmol L −1 and 5 µmol L −1 MDA, respectively, were 0.8% and 0.7%. The procedure was applied to the analysis of diabetic sera and the results compared with those obtained by HPLC (derivatization with 2,4-dinitrophenylhydrazine). Lower HPLC results (about 15%) indicated that interferences from other TBA reactive substances had not been completely eliminated by the extraction procedure and derivatization of spectral data. On the other hand, the micro-procedure presents important advantages: it is simple, precise and environmentally friendly (small amounts of reagents), which makes it readily adaptable to the analysis of large sample series. The feasibility of micro-assay in the evaluation of lipid peroxidation status was demonstrated in the analysis of 156 serum samples from diabetic patients divided into three groups according to the stage of development of typical complications.

ACS Style

Monica Preciado Puga; Kazimierz Wrobel; Ma. Eugenia Garay Sevilla; Katarzyna Wrobel; Alma Hortensia Serafin Muñoz. Micro Assay for Malondialdehyde in Human Serum by Extraction-Spectrophotometry Using an Internal Standard. Microchimica Acta 2004, 148, 285 -291.

AMA Style

Monica Preciado Puga, Kazimierz Wrobel, Ma. Eugenia Garay Sevilla, Katarzyna Wrobel, Alma Hortensia Serafin Muñoz. Micro Assay for Malondialdehyde in Human Serum by Extraction-Spectrophotometry Using an Internal Standard. Microchimica Acta. 2004; 148 (3):285-291.

Chicago/Turabian Style

Monica Preciado Puga; Kazimierz Wrobel; Ma. Eugenia Garay Sevilla; Katarzyna Wrobel; Alma Hortensia Serafin Muñoz. 2004. "Micro Assay for Malondialdehyde in Human Serum by Extraction-Spectrophotometry Using an Internal Standard." Microchimica Acta 148, no. 3: 285-291.