Efecto del fotoperiodo y la temperatura sobre la composición bioquímica en reproductores silvestres de cabrilla sardinera, Mycteroperca rosacea (Streets, 1877)

Effect of photoperiod and temperature on the biochemical composition in wild broodstock of sardine cabrilla, Mycteroperca rosacea (Streets, 1877)

JOSE ANTONIO ESTRADA GODINEZ MINERVA CONCEPCION MALDONADO GARCIA VICENTE GRACIA LOPEZ Rene Rebollar MILTON ALEJANDRO SPANOPOULOS ZARCO (2014, [Artículo])

"Se estimó el factor de condición (K), el índice gonadosomático (IGS), hepatosomático (IHS) y de grasa visceral (IGV), así como la composición bioquímica en diferentes tejidos de reproductores silvestres de cabrilla sardinera, Mycteroperca rosacea, para evaluarlos a lo largo de un ciclo reproductivo y ver la relación que presentan los cambios con respecto a la temperatura del agua y fotoperiodo de la zona de muestreo. Se capturaron 187 reproductores, 146 hembras y 41 machos en el golfo de California, México. Se observaron diferencias significativas (P < 0,005) en los IGS, IHS e IGV; en el caso de K no se encontraron diferencias. También, se observaron variaciones significativas (P < 0,05) en la mayoría de los parámetros bioquímicos, encontrándose los valores más altos durante la etapa de desove, mientras que los más bajos durante la etapa de reposo. Todos los índices estimados y los parámetros bioquímicos determinados, se correlacionaron significativamente (P < 0,05) con el fotoperiodo, mientras que solo se encontraron correlaciones significativas (P < 0,05) entre el IGS e IGV con respecto a la temperatura del agua."

"Condition factor (K), gonadosomatic index, (IGS), hepatosomatic index (IHS) and fat visceral index (IGV) were estimated and the biochemical composition in different tissues of wild leopard grouper broodstock was determinate too, in order to evaluate them along a reproductive cycle and see the relationship of these changes with respect to the water temperature and photoperiod in the sampling area. 187 brooders were caught, 146 females and 41 males in the Gulf of California, Mexico. Significant differences (P < 0.005) in the IGS, IHS and IGV but not for K were observed. Significant changes (P < 0.05) were also observed in most of the biochemical parameters, being the highest value during the spawning stage, whereas the lowest occurred during the resting stage. Significant correlations (P < 0.05) between all estimated indices and biochemical parameters were observed, while only significant correlations (P < 0.05) between the IGS and IGV with respect to water temperature."

Mycteroperca rosacea, cabrilla sardinera, ciclo reproductivo, composición bioquímica, fotoperiodo, temperatura, golfo de California wavelet sardine, reproductive cycle, biochemical composition, photoperiod, temperature, Gulf of California BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) FISIOLOGÍA ANIMAL FISIOLOGÍA ANIMAL

Solanum tuberosum Microtuber Development under Darkness Unveiled through RNAseq Transcriptomic Analysis

ELIANA VALENCIA LOZANO LISSET HERRERA ISIDRON Osiel Salvador Recoder-Meléndez Aarón Barraza Celis JOSE LUIS CABRERA PONCE (2022, [Artículo])

"Potato microtuber (MT) development through in vitro techniques are ideal propagules for producing high quality potato plants. MT formation is influenced by several factors, i.e., photoperiod, sucrose, hormones, and osmotic stress. We have previously developed a protocol of MT induction in medium with sucrose (8% w/v), gelrite (6g/L), and 2iP as cytokinin under darkness. To understand the molecular mechanisms involved, we performed a transcriptome-wide analysis. Here we show that 1715 up- and 1624 down-regulated genes were involved in this biological process. Through the protein–protein interaction (PPI) network analyses performed in the STRING database (v11.5), we found 299 genes tightly associated in 14 clusters. Two major clusters of up-regulated proteins fundamental for life growth and development were found: 29 ribosomal proteins (RPs) interacting with 6 PEBP family members and 117 cell cycle (CC) proteins. The PPI network of up-regulated transcription factors (TFs) revealed that at least six TFs–MYB43, TSF, bZIP27, bZIP43, HAT4 and WOX9–may be involved during MTs development. The PPI network of down-regulated genes revealed a cluster of 83 proteins involved in light and photosynthesis, 110 in response to hormone, 74 in hormone mediate signaling pathway and 22 related to aging."

transcriptome-wide analysis, microtubers, potato, Solanum tuberosum, darkness, cell cycle, ribosomal proteins, PEBP family genes, cytokinin BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA GENÉTICA GENÉTICA MOLECULAR DE PLANTAS GENÉTICA MOLECULAR DE PLANTAS

Low thermal conductivity solar domestic water heater

MIGUEL ANGEL PORTA GANDARA JOSE LUIS FERNANDEZ ZAYAS JUAN FRANCISCO VILLA MEDINA NORBERTO CHARGOY DEL VALLE (2022, [Artículo])

"Solar domestic water heaters (SWH) with thermosyphon circulation are the most common commercial applications of solar energy in Mexico. They are also becoming popular in the rest of the world, given their simplicity, good economic returns, and sustainability. Traditionally the solar collector, the piping, and the storage tank are built of copper and steel. However, wáter quality in many parts of the Mexican Northwest has high mineral contents and, when heated, results in early metal pitting corrosion of SWH parts. Short-lived water heaters are bad promoters of the technology. In this work, a SWH thermoplastic Chlorinated Polyvinyl Chloride (CPVC) is built and tested under real operating conditions in La Paz, BCS, Mexico. The optimal design is detected with the aid of a suitable numerical model. Results reveal that a full SWH-CPVC can be technically and economically convenient for the weather conditions of the Northwestern states of Mexico."

Low thermal conductivity solar water heater CPVC solar water heater Solar water heater cooper pitting corrosion Thermosiphon circulation INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS TECNOLOGÍA ELECTRÓNICA DISPOSITIVOS TERMOELÉCTRICOS DISPOSITIVOS TERMOELÉCTRICOS

Variability of Microcirculation Detected by Blood Pulsation Imaging

Alexei Kamshilin (2013, [Artículo])

The non-invasive assessment of blood flow is invaluable for the diagnostic and monitoring treatment of numerous vascular and neurological diseases. We developed a non-invasive and non-contact method of blood pulsation imaging capable of visualizing and monitoring of the two-dimensional distribution of two key parameters of peripheral blood flow: the blood pulsation amplitude and blood pulsation phase. The method is based on the photoplethysmographic imaging in the reflection mode. In contrast with previous imaging systems we use new algorithm for data processing which allows two dimensional mapping of blood pulsations in large object's areas after every cardiac cycle. In our study we carried out the occlusion test of the arm and found (i) the extensive variability of 2D-distribution of blood pulsation amplitude from one cardiac cycle to another, and (ii) existence of the adjacent spots to which the blood is asynchronously supplied. These observations show that the method can be used for studying of the multicomponent regulation of peripheral blood circulation. The proposed technique is technologically simple and cost-effective, which makes it applicable for monitoring the peripheral microcirculation in clinical settings for example, in diagnostics or testing the efficiency of new medicines. © 2013 Kamshilin et al.

algorithm, article, blood analysis, heart cycle, human, human experiment, image analysis, imaging system, male, microcirculation, peripheral circulation, photoelectric plethysmography, process development, Algorithms, Diagnostic Imaging, Diagnostic T CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA MATEMÁTICAS ANÁLISIS NUMÉRICO ANÁLISIS NUMÉRICO

Functional characterization and cellular dynamics of the CDC-42 - RAC - CDC-24 module in neurospora crassa

CYNTHIA LIZZETH ARAUJO PALOMARES (2011, [Artículo])

Rho-type GTPases are key regulators that control eukaryotic cell polarity, but their role in fungal morphogenesis is only beginning to emerge. In this study, we investigate the role of the CDC-42 - RAC - CDC-24 module in Neurospora crassa. rac and cdc-42 deletion mutants are viable, but generate highly compact colonies with severe morphological defects. Double mutants carrying conditional and loss of function alleles of rac and cdc-42 are lethal, indicating that both GTPases share at least one common essential function. The defects of the GTPase mutants are phenocopied by deletion and conditional alleles of the guanine exchange factor (GEF) cdc-24, and in vitro GDP-GTP exchange assays identify CDC-24 as specific GEF for both CDC-42 and RAC. In vivo confocal microscopy shows that this module is organized as membrane-associated cap that covers the hyphal apex. However, the specific localization patterns of the three proteins are distinct, indicating different functions of RAC and CDC-42 within the hyphal tip. CDC-42 localized as confined apical membrane-associated crescent, while RAC labeled a membrane-associated ring excluding the region labeled by CDC42. The GEF CDC-24 occupied a strategic position, localizing as broad apical membrane-associated crescent and in the apical cytosol excluding the Spitzenkörper. RAC and CDC-42 also display distinct localization patterns during branch initiation and germ tube formation, with CDC-42 accumulating at the plasma membrane before RAC. Together with the distinct cellular defects of rac and cdc-42 mutants, these localizations suggest that CDC-42 is more important for polarity establishment, while the primary function of RAC may be maintaining polarity. In summary, this study identifies CDC-24 as essential regulator for RAC and CDC-42 that have common and distinct functions during polarity establishment and maintenance of cell polarity in N. crassa. © 2011 Araujo-Palomares et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

CDC24 protein, guanine nucleotide exchange factor, protein Cdc42, Rac protein, unclassified drug, cell cycle protein, fungal protein, membrane protein, multiprotein complex, protein Cdc42, Rac protein, allele, apical membrane, article, assay, cell me BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA MICROBIOLOGÍA MICROBIOLOGÍA