Integrative transcriptome and metabolome analysis reveals the mechanisms of light-induced pigmentation in purple waxy maize

XUECAI ZHANG Yunbi Xu Prasanna Boddupalli (2023, [Artículo])

Pigment Accumulation Light Response CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA ANTHOCYANINS LIGHT METABOLOMICS TRANSCRIPTOMICS WAXY MAIZE

Synthesis of hollow carbon spheres by chemical activation of carbon nanoparticles for their use in electrochemical capacitor

Cesar Eduardo Sanchez Rodriguez EDUARDO TOVAR MARTINEZ MARISOL REYES REYES Luis Felipe Cházaro Ruiz ROMAN LOPEZ SANDOVAL (2022, [Artículo])

"Naphthalene combustion has been used to synthesize grams per hour of solid carbon spheres (CS). The carbon soot was activated by acid treatment consisting in a mixture of HNO3 and H2SO4 (1/3 v/v) to produce hollow carbon spheres (HCS). The effect of two concentrations of CSs (5 and 10 mg mL−1) in the acid mixture, on the physicochemical properties of the activated HCSs was studied. The HSCs were subjected to a thermal treatment to increase their graphitization to enhance their electrical conductivity. High-resolution transmission electron microscopy confirmed the formation of HCSs due to the acid treatment whereas FTIR spectra showed that the chemical activation produced functional groups on the carbon spheres surface and the heat treatment effect to remove some of them as well. A specific surface area of 300 m2 g−1 and a large density of micropores for the acid-treated CSs as well as the heat-treated CSs were estimated by analysis of N2 adsorption-desorption isotherms. A specific capacitance 70 F g−1 was calculated by cyclic voltammetry of the acid and thermally treated HCSs at 5 mV s−1, for both CS concentrations, indicating the possibility of synthesizing these HCSs using a simple method in large quantities for their use in electrochemical capacitors."

Physicochemical properties Carbon nanoparticles Chemical activation Electrochemical capacitor BIOLOGÍA Y QUÍMICA QUÍMICA QUÍMICA

Research for development approaches in mixed crop-livestock systems of the Ethiopian highlands

Million Gebreyes James Hammond Lulseged Tamene Getachew Agegnehu Rabe Yahaya Anthony Whitbread (2023, [Artículo])

This study presents processes and success stories that emerged from Africa RISING's Research for Development project in the Ethiopian Highlands. The project has tested a combination of participatory tools at multiple levels, with systems thinking and concern for sustainable and diversified livelihoods. Bottom-up approaches guided the selection of technological interventions that could address the priority farming system challenges of the communities, leading to higher uptake levels and increased impact. Joint learning, appropriate technology selection, and the creation of an enabling environment such as the formation of farmer research groups, the establishment of innovation platforms, and capacity development for institutional and technical innovations were key to this study. The study concludes by identifying key lessons that focus more on matching innovations to community needs and geographies, systems orientation/integration of innovations, stepwise approaches to enhance the adoption of innovations, documenting farmers' capacity to modify innovations, building successful partnerships, and facilitating wider scaling of innovations for future implementation of agricultural research for development projects.

Action Research Systems Thinking CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA INNOVATION PARTNERSHIPS SCALING UP INTEGRATED CROP-LIVESTOCK SYSTEMS

Estimating lime requirements for tropical soils: Model comparison and development

Fernando Aramburu Merlos João Vasco Silva Frédéric Baudron Robert Hijmans (2023, [Artículo])

Acid tropical soils may become more productive when treated with agricultural lime, but optimal lime rates have yet to be determined in many tropical regions. In these regions, lime rates can be estimated with lime requirement models based on widely available soil data. We reviewed seven of these models and introduced a new model (LiTAS). We evaluated the models’ ability to predict the amount of lime needed to reach a target change in soil chemical properties with data from four soil incubation studies covering 31 soil types. Two foundational models, one targeting acidity saturation and the other targeting base saturation, were more accurate than the five models that were derived from them, while the LiTAS model was the most accurate. The models were used to estimate lime requirements for 303 African soil samples. We found large differences in the estimated lime rates depending on the target soil chemical property of the model. Therefore, an important first step in formulating liming recommendations is to clearly identify the soil property of interest and the target value that needs to be reached. While the LiTAS model can be useful for strategic research, more information on acidity-related problems other than aluminum toxicity is needed to comprehensively assess the benefits of liming.

Exchangeable Acidity Aluminum Saturation Calcium Carbonate Equivalent CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CHEMICOPHYSICAL PROPERTIES LIMES TROPICAL ZONES ACID SOILS ALUMINIUM BASE SATURATION CALCIUM CARBONATE

Operación y mantenimiento del sistema acuícola con reúso de agua residual tratada y descarga cero

LUCIANO SANDOVAL YOVAL (2013, [Documento de trabajo])

El objetivo del proyecto fue la operación y mantenimiento del sistema acuícola de peces de ornato de la planta de tratamiento de aguas residuales.

Acuicultura Tratamiento de aguas residuales INGENIERÍA Y TECNOLOGÍA

Visión panorámica de las precipitaciones pluviales combinadas por los efectos de los ciclones tropicales Ingrid-Manuel

MOISES MICHEL ROSENGAUS MOSHINSKY Felipe Arreguin (2016, [Artículo])

Se presenta un análisis panorámico de las precipitaciones pluviales que generaron los ciclones tropicales Ingrid y Manuel durante los días en que actuaron de forma simultánea sobre México, con énfasis en las características que no corresponden a la simple superposición de los campos de lluvias que cada uno de ellos hubiese generado de manera individual. Se muestra que la circulación combinada de la humedad alrededor de ambos vórtices explica conceptualmente las extensiones anómalas de la zona lluviosa que se manifestaron hacia el noreste de México, en el caso de Ingrid, y hacia el sureste de México, en el caso de Manuel. Se muestra que el evento combinado resultó mucho mayor que el referente previo en la zona del Pacífico (huracán Pauline, en 1997). Para tres cuencas específicas cercanas a Acapulco, Guerrero, se calcularon los periodos de retorno de las lluvias ocurridas durante este evento, identificando que, aunque las acumulaciones diarias resultaron extremas, las secuencias ocurridas de 2 a 5 días consecutivos corresponden a un periodo de retorno mucho mayor.

Huracanes Hidrometeorología Acapulco CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA

Accumulation of wheat phenolic acids under different nitrogen rates and growing environments

Wenfei Tian Yong Zhang Zhonghu He (2022, [Artículo])

Functional Wheat Trans-Ferulic Acid Nitrogen Management Environment Interaction CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA WHEAT PHENOLIC ACIDS NITROGEN ENVIRONMENT ANTIOXIDANTS

Entre la solidaridad y el capital: niveles de subsunción de las experiencias de economía popular

EDUARDO ENRIQUE AGUILAR HERNANDEZ (2023, [Artículo])

"El presente trabajo abona al debate sobre la disputa conceptual y de sentido de las economías populares. Este proceso de reflexión está fundamentado en los resultados de entrevistas semiestructuradas y la observación participante de proyectos de economía popular en Jalisco, que analizo mediante categorías de economía política para comprender los diferentes niveles de subsunción al sistema de producción capitalista. Como conclusión del trabajo, visibilizo que, dentro del ámbito material, las experiencias de economía popular con mayor composición orgánica de capital, como la cooperativa llantera, tienen una subsunción real al sistema, mientras que aquellas iniciativas de baja composición, como las iniciativas agroecológicas, están subsumidas a éste de manera formal".

CIENCIAS SOCIALES CIENCIAS ECONÓMICAS ACTIVIDAD ECONÓMICA COMERCIO INTERIOR COMERCIO INTERIOR

Genetic potential of tropically adapted exotic maize (Zea mays L.) heat-tolerant donor lines in sub-tropical breeding programs

Casper Nyaradzai Kamutando Cosmos Magorokosho Pervez Zaidi (2023, [Artículo])

Gene Action Grain Yield CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA COMBINING ABILITY EXOTIC GERMPLASM GRAIN YIELDS HEAT STRESS

Biofortification to avoid malnutrition in humans in a changing climate: Enhancing micronutrient bioavailability in seed, tuber, and storage roots

Ana Luisa Garcia-Oliveira Mahalingam Govindaraj Rodomiro Ortiz (2023, [Artículo])

Bioaccessibility and Absorption Biofortified Crop Cultivars Genes and Genetic Markers Nutrient Acquisition Transport and Storage CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA BIOAVAILABILITY ABSORPTION CLIMATE CHANGE GENETIC MARKERS GENETIC ENGINEERING NUTRIENTS TRANSPORT STORAGE