Contribution to the knowledge of the Discomycetes of Mexico with special reference to the genus Helvella.

[EN] Within the 29 taxa of Discomycetes from Mexico studied here, 11 species and a variety are new records for the country: Ascobolus stercorarius, Ascocoryne sarcoides, Bisporella citrina, Dasyscyphus avellaneo-mellea, D. sopitii, Microglossum atropurpureum, Sarcosphaera crassa, Helvella costifera, H. lactea, H. leucomelaena,H. leucopus and H. leucopus varo populina. New data on their taxonomy, ecology and chorology are also added.[ES] Se citan 29 táxones de discomicetos de México, de los cuales 11 especies y una variedad son nuevos para el país: Ascobolus stercorarius, Ascocoryne sarcoides, Bisporella citrina, Dasyscyphus avellaneo-mellea, D. sopitii, Microglossum atropurpureum, Sarcosphaera crassa, Helvella costiJera, H. lactea, H. leucomelaena,H. leucopus y H. leucopus varo populina. Se anotan nuevos registros para varios Estados de la República de México, así como información sobre distribución, taxonomía y ecología.Peer reviewe

TIPOLOGÍA DE PRESTADORES DE SERVICIOS AGROPECUARIOS Y FORESTALES ESPECIALIZADOS PARA LAS ZONAS TROPICALES EN MÉXICO

Presently, rural extension work in Mexico has developed under a vertical strategy, where technology transference is the main objective without taking into account the participation of producers; thus, it is necessary for professional service providers (PSP) to develop the human and social capital of people with a sustainable management of the natural resources available. With the objective of characterizing the professional service providers from the project of training for specialized technicians in tropical agriculture, livestock production and forestry for the development of tropical zones in Mexico, in the bilateral agreement signed between Mexico and Brazil, a survey was performed and analyzed, under three sections: general data, expectations and perspectives, which helped to identify the main characteristics of extension workers and the limitations they face to adequately carry out the activities of rural extension work in Mexico. The PSP indicated that inadequate public policies for the agricultural-livestock sector are the main factor that limits the service of the extensionmworker, as well as the discrepancy in salaries they earn, under the premise that a continuous improvement is necessaryin the service of rural extension work in Mexico, in order to achieve the development of skills among them to be able to transmit them to peers and agricultural and livestock producers.Actualmente el Extensionismo rural en México se ha desarrollado bajo una estrategia vertical, donde la transferencia de tecnología es el objetivo principal sin contar la participación de los productores por lo que es necesario que el prestador de servicios profesionales (PSP) pueda desarrollar el capital humanoy social de las personas con un manejo sostenible de recursos naturales que dispongan. Con el objetivo de caracterizar a los prestadores de servicios profesionales del proyecto de formación de técnicos especializados en agricultura, ganadería y silvicultura tropical para el desarrollo de las zonas tropicales de México, en el convenio bilateral celebrado entre México y Brasil, se realizó una encuesta y su análisis, bajo tres apartados; datos generales, expectativas y perspectivas, que ayudaron a identificar las características principales de los extensionistas y las limitantes que afrontan para desarrollar adecuadamente las actividades del Extensionismo rural en México. Los PSP indicaron que las inadecuadas políticas públicas para el sector agropecuario es el factor principal que limita el servicio del extensionista, así como el desfase de salarios que perciben, bajo la premisa de que es necesario una mejora continua en el servicio del extensionismo rural en México, para lograr el desarrollo de capacidades entre ellos y poder transmitirlos a pares y a productores agropecuarios

Database NewSQL performance evaluation for big data in the public cloud

For very years, relational databases have been the leading model for data storage, retrieval and management. However, due to increasing needs for scalability and performance, alternative systems have emerged, namely NewSQL technology. NewSQL is a class of modern relational database management systems (RDBMS) that provide the same scalable performance of NoSQL systems for online transaction processing (OLTP) read-write workloads, while still maintaining the ACID guarantees of a traditional database system. In this research paper, the performance of a NewSQL database is evaluated, compared to a MySQL database, both running in the cloud, in order to measure the response time against different configurations of workloads.Instituto de Investigación en Informátic

Database NewSQL performance evaluation for big data in the public cloud

For very years, relational databases have been the leading model for data storage, retrieval and management. However, due to increasing needs for scalability and performance, alternative systems have emerged, namely NewSQL technology. NewSQL is a class of modern relational database management systems (RDBMS) that provide the same scalable performance of NoSQL systems for online transaction processing (OLTP) read-write workloads, while still maintaining the ACID guarantees of a traditional database system. In this research paper, the performance of a NewSQL database is evaluated, compared to a MySQL database, both running in the cloud, in order to measure the response time against different configurations of workloads.Instituto de Investigación en Informátic

Seed Collection and Germination Strategies for Common Wetland and Coastal Sage Scrub Species in Southern California

There is a need for a consolidated source of information on native vegetation seed collection and germination strategies in southern California. Published literature on these methods is often experimental, species-specific, and widely scattered throughout online and print media. Planting and restoration strategies may need to be site-specific; however, similar methodological approaches are often utilized allowing for the development of general strategies for seed collection, storage, and germination methods. A better understanding of species-specific seed attributes and growth processes will help restoration ecologists collect high-quality, viable seed, thereby increasing the potential success of the restored vegetation community by reducing plant mortality, project costs, and effort. This paper synthesizes seed collection and germination strategies for native vegetation common to southern California estuarine wetland, coastal dune, and coastal sage scrub systems

Glia and Muscle Sculpt Neuromuscular Arbors by Engulfing Destabilized Synaptic Boutons and Shed Presynaptic Debris

As synapses grow at the Drosophila neuromuscular junction, they shed membrane material in an activity-dependent manner. Glia and postsynaptic muscle cells are required to engulf this debris to ensure new synaptic growth

SSDSS IV MaNGA - Properties of AGN host galaxies

We present here the characterization of the main properties of a sample of 98 AGN host galaxies, both type-II and type-I, in comparison with those of about 2700 non-active galaxies observed by the MaNGA survey. We found that AGN hosts are morphologically early-type or early-spirals. For a given morphology AGN hosts are, in average, more massive, more compact, more central peaked and rather pressurethan rotational-supported systems. We confirm previous results indicating that AGN hosts are located in the intermediate/transition region between star-forming and non-star-forming galaxies (i.e., the so-called green valley), both in the ColorMagnitude and the star formation main sequence diagrams. Taking into account their relative distribution in terms of the stellar metallicity and oxygen gas abundance and a rough estimation of their molecular gas content, we consider that these galaxies are in the process of halting/quenching the star formation, in an actual transition between both groups. The analysis of the radial distributions of the starformation rate, specific star-formation rate, and molecular gas density shows that the quenching happens from inside-out involving both a decrease of the efficiency of the star formation and a deficit of molecular gas. All the intermediate data-products used to derive the results of our analysis are distributed in a database including the spatial distribution and average properties of the stellar populations and ionized gas, published as a Sloan Digital Sky Survey Value Added Catalog being part of the 14th Data Release: http://www.sdss.org/dr14/manga/manga-data/manga-pipe3d-value-added-catalog/Comment: 48 pages, 14 figures, in press in RMxA

TiO2/Au/TiO2 multilayer thin-film photoanodes synthesized by pulsed laser deposition for photoelectrochemical degradation of organic pollutants

Most commonly employed anodes for photoelectrochemical degradation of organic contaminants in water are too thick, resulting in a low degradation efficiency due to the excessive electron-hole recombination. Multilayer-type TiO 2 /Au/TiO 2 nanocomposites have been prepared as photoanode thin films by pulsed laser deposition (PLD). The films were composed of six TiO 2 and five Au alternate layers, with total thickness of about 212 nm, aimed to optimize the absorption of photons and minimize the recombination. The influence of gold on the optical, structural, and chemical properties of the semiconductor nanocomposites was investigated. The band gap determined from Tauc model was 3.22 eV, close to that obtained by spectroscopic ellipsometry and lower than that of the TiO 2 film, revealing an enhancement of visible light absorption. The catalytic performance of PLD films was evaluated by using them as anodes in electro-oxidation (EO) and photoanodes in photoelectrocatalysis (PEC) to degrade 39-157 mg L ⁻¹ paracetamol in sulfate medium. The drug removal was very slow in EO, due to the low ability to form [rad] OH on the anode surface, which was significantly enhanced upon UVA irradiation in PEC. The presence of Cl ⁻ allowed a faster degradation by produced active chlorine. Finally, a hybrid process involving PEC + photoelectro-Fenton (PEF) with an air-diffusion cathode yielded total paracetamol decay in 4-5 min at an anodic potential of +4.0 V because of the efficient [rad] OH generation from Fenton's and photo-Fenton reactions. Hydroquinone, p-benzoquinone and hydroxylated products were detected during EO and PEC. The generation of active chlorine was confirmed by identifying a chlorinated derivative, N-(4-chloro-2-hydroxyphenyl)acetamide, in PEC + PEF treatment