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Course-based Undergraduate Research Experiences (CUREs) integrate active, discovery-based learning into undergraduate curricula, adding tremendous value to Biochemistry and Molecular Biology (BMB) education. There are multiple challenges in transforming a research project into a CURE, such as the readiness of students, the time commitment of the instructor, and the productivity of the research. In this article, we report a CURE course developed and offered in the University of Massachusetts Amherst BMB Department since 2018 that addresses these challenges. Our CURE focuses on fungal effectors which are proteins secreted by a destructive pathogenic fungus Fusarium oxysporum, one of the top five most devastating plant pathogens. By studying this group of proteins, students are connected to real-world problems and participate in the search for potential solutions. A 3-week "standard Boot Camp" is implemented to help students familiarize themselves with all basic techniques and boost their confidence. Next, molecular cloning, a versatile technique with modularity and repeatability, is used as the bedrock of the course. Our past 5 years of experience have confirmed that we have developed a novel and feasible CURE protocol. Measurable progress documented by students who took this course includes stimulated active learning and increased career trajectory to pursue hypothesis-based research to address societal needs. In addition, data generated through the course advance ongoing lab research. Collectively, we encourage the implementation of CURE among research-intensive faculty to provide a more inclusive research experience to undergraduate students, an important element in predicting career success.

Referencias bibliográficas de las publicaciones (monografías, artículos, congresos...) que han realizado en el año 2023 los miembros de las áreas de Prehistoria y Arqueología del Departamento de Ciencias de la Antigüedad de la Universidad de Zaragoza.

Objetivo: Evaluar el impacto de la comorbilidad y de las coinfecciones presentadas por la infección por SARS-CoV-2 vs. COVID-19 en niños mexicanos. Método: Estudio prospectivo y observacional que comprendió la temporada alta de influenza 2020-2021, analizando todos los pacientes con diagnóstico de infección vs. enfermedad por SARS-CoV-2 vs. COVID-19 que ingresaron al Hospital Infantil de México. Se realizó en todos RT-PCR en tiempo real para SARS-CoV-2, determinando gen E, gen RdRp, gen RP y proteína N, y RT-PCR multiplex para detección de virus respiratorios. Resultados: Los criterios de inclusión los cumplieron 163 pacientes. El grupo con mayor riesgo de enfermar fueron los adolescentes (40.4%), seguidos de los escolares y preescolares (21.4% y 19.6% de los casos, respectivamente). Hubo tres casos con coinfección viral: dos (1.2%) con parvovirus B-19 y uno (0.6%) con herpes tipo I; hubo otros dos (1.2%) con coinfección bacteriana. La principal comorbilidad correspondió a obesidad, leucemia linfoblástica aguda e hipertensión arterial. En cuanto a mortalidad, solo hubo cuatro casos (2.4%). Conclusiones: Obesidad, cáncer, hipertensión, cardiopatías y diabetes constituyen la comorbilidad en nuestros pacientes, como se refiere en la literatura, no así las coinfecciones. En nuestro estudio no hubo casos de mortalidad relacionada con la comorbilidad.

This paper aims to analyse the level of commitment with the SDGs of large Spanish companies based on the information published in their Non-Financial Statements and their letters from the chairman. To achieve this objective and identify potential explanatory factors, a balanced sample of 58 Spanish companies, 29 listed and 29 unlisted, in 2019 has been used. The results of this study evidence: i) the greater commitment with the SDGs of companies which are exposed in the stock markets and those which are larger; ii) the relevance of the diversity into the boards of directors, in order to integrate the largest and the widest number of interests as well as those values and principles which are intrinsically associated to women directors; and iii) the greater emphasis on those SDGs related to well-known issues by these organizations, thanks to their greater experience in non-financial reporting, publishing documents such as corporate social responsibility or sustainability reports.

Cv ‘Doña María’ table grape is a high-quality table grape variety included in the Protected Designation of Origin (PDO) of the European Union “The bagged grape of the Vinalopó”. The PDO stipulates that grape clusters must be protected with paper bags from inclement weather and insects, which helps enhance the final grape quality. However, ‘Doña María’ is a variety prone to high shattering in the late stages of ripening on the vine and during postharvest. Inorganic calcium treatments are one of the most commonly used tools to reduce this disorder, but the translocation of this mineral from veraison onward has been questioned. In this study, five applications were performed, from veraison to harvest, using sorbitol-chelated calcium (0.7% + 1.0%), Ca(NO3)2 (Ca) at 0.7% and sorbitol at 1%. It was observed that bagged grapes (not wetted with the solutions) only increased the concentration of total and bound calcium when treated with sorbitol–Ca. This resulted in reduced berry drop during cultivation and postharvest and improved fruit firmness. Additionally, it reduced grape metabolism indicators such as respiration rate, weight loss, malic acid degradation, prevented abscisic acid (ABA) and malondialdehyde (MDA) accumulation, and favored the accumulation of secondary metabolites such as total polyphenols, increased antioxidant activity, and sugar content. The application of sorbitol-chelated calcium is an effective and safe tool that enhances fruit quality and prevents losses due to shattering during postharvest.

Se actualiza la aplicación de las tecnologías de Trampas magnéticas en diferentes ramas productivas y en los procesos de descontaminación y enriquecimiento de diversas industrias a nivel internacional y en la industria azucarera cubana, así como su influencia en diseños de equipos, mejoras en los parámetros del campo magnético y de las trampas magnéticas utilizadas, por lo que se pueden lograr nuevas perspectivas de desarrollo en la industria azucarera cubana con el objetivo que las producciones azucareras cumplan con las exigencias de los estándares de calidad de las normas ISO.

Microbial volatile organic compounds (MVOCs) are mixtures of gas-phase hydrophobic carbon-based molecules produced by microorganisms such as bacteria and fungi. They can act as airborne signals sensed by plants being crucial players in triggering signaling cascades influencing their secondary metabolism, development, and growth. The role of fungal volatile organic compounds (FVOCs) from beneficial or detrimental species to influence the physiology and priming effect of plants has been well studied. However, the plants mechanisms to discern between FVOCs from friend or foe remains significantly understudied. Under this outlook, we present an overview of the VOCs produced by plant-associate fungal species, with a particular focus on the challenges faced in VOCs research: i) understanding how plants could perceive FVOCs, ii) investigating the differential responses of plants to VOCs from beneficial or detrimental fungal strains, and finally, iii) exploring practical aspects related to the collection of VOCs and their eco-friendly application in agriculture.

Plant xylem colonization is the hallmark of vascular wilt diseases caused by phytopathogens within the Fusarium oxysporum species complex. Recently, xylem colonization has also been reported among endophytic F. oxysporum strains, resulting in some uncertainty. This study compares xylem colonization processes by pathogenic versus endophytic strains in Arabidopsis thaliana and Solanum lycopersicum, using Arabidopsis pathogen Fo5176, tomato pathogen Fol4287, and the endophyte Fo47, which can colonize both plant hosts. We observed that all strains were able to advance from epidermis to endodermis within 3 days postinoculation (dpi) and reached the root xylem at 4 dpi. However, this shared progression was restricted to lateral roots and the elongation zone of the primary root. Only pathogens reached the xylem above the primary-root maturation zone (PMZ). Related to the distinct colonization patterns, we also observed stronger induction of callose at the PMZ and lignin deposition at primary-lateral root junctions by the endophyte in both plants. This observation was further supported by stronger induction of Arabidopsis genes involved in callose and lignin biosynthesis during the endophytic colonization (Fo47) compared with the pathogenic interaction (Fo5176). Moreover, both pathogens encode more plant cell wall–degrading enzymes than the endophyte Fo47. Therefore, observed differences in callose and lignin deposition could be the combination of host production and the subsequent fungal degradation. In summary, this study demonstrates spatial differences between endophytic and pathogenic colonization, strongly suggesting that further investigations of molecular arm-races are needed to understand how plants differentiate friend from foe. [Graphic: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Spain is one of the main contributors to global pomegranate production. Pomegranate presents a challenge for preservation at suboptimal temperatures. Preserving this fruit for an extended period is challenging due to its susceptibility to chilling injury (CI). For this reason, we have examined different postharvest treatments to extend the pomegranate shelf life and their potential impact on reducing CI. For this reason, two postharvest treatments have been applied: 1-Methylcyclopropene (1000 nL L−1 1-MCP) and methyl jasmonate vapors (0.01 mM MeJA), a natural elicitor found in many plant organs that induces a wide range of physiological processes, including the activation of defense mechanisms against stress. Following the application of these treatments and subsequent fruit storage at 2 °C for 90 days, maintenance of firmness and membrane integrity was observed. Additionally, a positive synergic effect was observed in these quality traits when combining both substances (1-MCP + MeJA), especially with regard to delaying weight loss, the external color evolution, and total polyphenol accumulation. On the other hand, MeJA treatment alone or in combination with 1-MCP also increased the anthocyanin content in arils, thereby enhancing the fruit quality. In general, the best results were observed when these two different technologies were applied as a combined treatment, especially in terms of maintaining quality traits such as fruit firmness and total acidity and reducing weight loss and CI. This is the first time that these two substances have been tested together in any fruit species, and their simultaneous application in the same container represents an innovative approach that could be an interesting tool for commercial purposes.

OBJECTIVES:. To establish the epidemiological characteristics, ventilator management, and outcomes in patients with acute hypoxemic respiratory failure (AHRF), with or without acute respiratory distress syndrome (ARDS), in the era of lung-protective mechanical ventilation (MV). DESIGN:. A 6-month prospective, epidemiological, observational study. SETTING:. A network of 22 multidisciplinary ICUs in Spain. PATIENTS:. Consecutive mechanically ventilated patients with AHRF (defined as Pao2/Fio2 ≤ 300 mm Hg on positive end-expiratory pressure [PEEP] ≥ 5 cm H2O and Fio2 ≥ 0.3) and followed-up until hospital discharge. INTERVENTIONS:. None. MEASUREMENTS AND MAIN RESULTS:. Primary outcomes were prevalence of AHRF and ICU mortality. Secondary outcomes included prevalence of ARDS, ventilatory management, and use of adjunctive therapies. During the study period, 9,803 patients were admitted: 4,456 (45.5%) received MV, 1,271 (13%) met AHRF criteria (1,241 were included into the study: 333 [26.8%] met Berlin ARDS criteria and 908 [73.2%] did not). At baseline, tidal volume was 6.9 ± 1.1 mL/kg predicted body weight, PEEP 8.4 ± 3.1 cm H2O, Fio2 0.63 ± 0.22, and plateau pressure 21.5 ± 5.4 cm H2O. ARDS patients received higher Fio2 and PEEP than non-ARDS (0.75 ± 0.22 vs 0.59 ± 0.20 cm H2O and 10.3 ± 3.4 vs 7.7 ± 2.6 cm H2O, respectively [p < 0.0001]). Adjunctive therapies were rarely used in non-ARDS patients. Patients without ARDS had higher ventilator-free days than ARDS (12.2 ± 11.6 vs 9.3 ± 9.7 d; p < 0.001). All-cause ICU mortality was similar in AHRF with or without ARDS (34.8% [95% CI, 29.7–40.2] vs 35.5% [95% CI, 32.3–38.7]; p = 0.837). CONCLUSIONS:. AHRF without ARDS is a very common syndrome in the ICU with a high mortality that requires specific studies into its epidemiology and ventilatory management. We found that the prevalence of ARDS was much lower than reported in recent observational studies.

Rainfall occurring during the developmental stages of sweet cherries on the tree can lead to significant preharvest losses, primarily due to fruit cracking. Certain cultivars exhibit a higher susceptibility to such losses, particularly when persistent rains coincide with advanced phenological stages. The current study aims to investigate the efficacy of preharvest methyl jasmonate (MeJA) applications at harvest and during distinct developmental ripening stages in mitigating sweet cherry cracking at harvest and on-tree ripening. Preharvest foliar applications of 0.5 mM MeJA were applied across various sweet cherry cultivars, including ‘Prime Giant’, ‘Early Lory’, ‘Sweetheart’, and ‘Staccato’. By conducting this experiment over four growing seasons, we evaluated the impact of this natural elicitor on the cracking tolerance of these cultivars. The results of our analysis indicate that MeJA preharvest treatments effectively reduce fruit cracking, enhancing abiotic stress tolerance. Additionally, these treatments induce a general delay in fruit ripening on the tree across the examined cultivars. This delayed ripening effect is reflected in several quality parameters at harvest, such as the fruit firmness, external colour, total soluble solids, and total acidity. These parameters in the MeJA-treated fruit were delayed compared to the control fruit or remained unaffected for the total acidity. Conversely, the MeJA treatments delayed the accumulation of total polyphenols, exhibiting a minimal impact on reducing pedicel browning. The enhanced tolerance to cracking and delayed ripening attributed to the MeJA preharvest treatments could be helpful for plot management. Consequently, these MeJA-based preharvest treatments hold potential as valuable tools in adapting to climate change and mitigating abiotic stress in sweet cherry.

GABA (γ-Aminobutyric acid) is an amino acid with diverse effects on plant development, including delayed senescence in horticultural commodities. The main goal of this research was to investigate the impact of GABA applications to pomegranate trees on the ‘Mollar de Elche’ quality traits and antioxidant compounds during storage for 60 days at 10 °C. In the 2019 experiment, pomegranate trees received foliar sprays of GABA at 10-, 50- or 100-mM concentrations at three stages of fruit development. Pomegranates harvested from GABA-treated trees exhibited enhanced fruit firmness, titratable acidity, the red color of skin and aril, and higher levels of total phenolics and total and specific anthocyanins compared to those obtained from the control group. These quality traits were maintained at higher levels during 60 days of preservation at 10 °C, and the most important effects were observed for 100 mM dose. In a 2020 experiment, GABA was sprayed at a 100 mM dose, and results were confirmed, showing a retard of the ripening process in pomegranates from GABA-treated trees concerning controls for two months of storage and an extension of their shelf life (with optimal quality traits appreciated by consumers) from 30 to 60 days. Moreover, the increase in anthocyanin content due to GABA treatments resulted in redder fruits, which would appeal more to consumers and have improved health benefits.

Kiwifruit, like many other fruits, is susceptible to dehydration, leading to texture changes and a loss of flavour during storage. Exposing kiwifruit to suboptimal temperatures can control these changes but can cause internal browning. Postharvest treatments with substances such as 1-methylcyclopropene (1-MCP) are some of the most successful commercial technologies in the conservation of fruits and vegetables. In recent years, there has been a growing interest among researchers in alternative technologies based in postharvest treatments with plant growth regulators. In this sense, melatonin (MT) has been shown to improve fruit quality, extending shelf life. The aim of this study was to compare these two different technologies applied at postharvest to evaluate the impact on kiwifruit quality. Optimal 1-MCP fumigations and MT solutions were assayed on ‘Hayward’ kiwifruit under similar conditions. Quality parameters were evaluated at 14-day intervals during 84 days of cold storage plus 5 days at 20 °C. The results showed that both treatments were similarly effective in maintaining quality parameters such as weight loss, respiration, firmness, and acidity. Although 1-MCP treatments delayed the evolution of kiwifruit colour and chlorophyll degradation as compared to MT, MT treatments controlled chilling injury better than 1-MCP. This effect was not related to a greater cell membrane integrity since fruit batches treated with 1-MCP were the ones that showed the lowest electrolyte leakage level. In conclusion, both treatments maintained fruit quality and delayed ripening in a similar way. In this sense, the results suggest that MT immersion treatments could act as efficient delaying senescence as fumigations with 1-MCP maintaining kiwifruit quality during refrigerated storage.

Pomegranate is a sensitive fruit to chilling injury (CI) during storage at temperatures below 7 °C. However, sensitivity of pomegranate to CI is dependent on cultivar and exposure times to low temperatures. In this work, the sensitivity to CI of six pomegranate cultivars (Punica granatum L.) ‘Wonderful’, ‘Kingdom’, ‘Bigful’, ‘Acco’, ‘Purple Queen’, and ‘Mollar de Elche’, was evaluated after 30 d at 2 °C plus 2 d at 20 °C. Among cultivars, there was a great variability in the sensitivity to the appearance of CI symptoms. ‘Kingdom’ cultivar was the most CI sensitive and ‘Mollar de Elche’ cultivar was the least sensitive cultivar. CI symptoms were greater in the internal part of the skin than in the external part, although no correlation was found between ion leakage (IL) and CI severity after cold storage. However, both, external and internal CI index were correlated with the IL at harvest, with Pearson correlation of 0.63 and 0.80, respectively. In addition, this variability to CI among cultivars could also be due to composition and tissue structures in arils and peel. The solute content of the arils (anthocyanins, sugars, and organic acids, in particular citric acid), showed high correlations with CI sensitivity, with Pearson correlations (r) of 0.56 for total soluble solids, 0.87 for total acidity, 0.94 for anthocyanins, −0.94 for oxalic acid, 0.87 for citric acid, 0.62 for tartaric acid, −0.91 for malic acid, 0.8 for sucrose, and 0.71 for glucose, which can leak to the inner surface of the peel causing browning reactions. In addition, the high peel Ca/K ratio could play an important role on increasing fruit tolerance to CI, since it was negatively correlated with the internal and external CI indexes.

The Fusarium oxysporum species complex (FOSC) includes both plant and human pathogens that cause devastating plant vascular wilt diseases and threaten public health. Each F. oxysporum genome comprises core chromosomes (CCs) for housekeeping functions and accessory chromosomes (ACs) that contribute to host-specific adaptation. This study inspects global transcription factor profiles (TFomes) and their potential roles in coordinating CC and AC functions to accomplish host-specific interactions. Remarkably, we found a clear positive correlation between the sizes of TFomes and the proteomes of an organism. With the acquisition of ACs, the FOSC TFomes were larger than the other fungal genomes included in this study. Among a total of 48 classified TF families, 14 families involved in transcription/translation regulations and cell cycle controls were highly conserved. Among the 30 FOSC expanded families, Zn2-C6 and Znf_C2H2 were most significantly expanded to 671 and 167 genes per family including well-characterized homologs of Ftf1 (Zn2-C6) and PacC (Znf_C2H2) that are involved in host-specific interactions. Manual curation of characterized TFs increased the TFome repertoires by 3% including a disordered protein Ren1. RNA-Seq revealed a steady pattern of expression for conserved TF families and specific activation for AC TFs. Functional characterization of these TFs could enhance our understanding of transcriptional regulation involved in FOSC cross-kingdom interactions, disentangle species-specific adaptation, and identify targets to combat diverse diseases caused by this group of fungal pathogens.

El agua para consumo humano se distribuye entre los fines que la demandan: doméstico, agropecuario e industrial. De acuerdo a lo reportado por la FAO y UNESCO la agricultura consume 69%, el consumo doméstico utiliza 10% y la industria el 21%. Dada la importancia del agua en la agricultura se requiere conocer la asignación óptima del recurso dado un patrón de cultivos, así como el valor económico del líquido. El objetivo de este trabajo fue el obtener un patrón óptimo de cultivos en el Distrito de Riego (DR) 100 Alfajayucan Hidalgo, así como el de estimar el precio económico del agua ante distintos escenarios. La hipótesis establece que las tarifas pagadas por los agricultores en el DR 100 no reflejan su verdadero valor de escasez. Se instrumentó un modelo de programación lineal para maximizar el ingreso neto de los agricultores con 17 actividades agrícolas cíclicas y perenes, sujetas a 57 restricciones de superficie, agua, mano de obra y maquinaria. Los resultados indican que el ingreso neto del DR 100 se incrementaría en 273 millones de pesos si se establece el patrón óptimo de cultivos, en comparación con el obtenido en el ciclo agrícola 2015-2016. El precio económico del agua arrojado por el modelo fue de $1.44 m-3, muy superior al pagado actualmente por las cuotas de riego ($0.02 m‑3), se confirma la existencia de un fuerte subsidio al consumo de agua: por lo que se recomienda se incrementen las cuotas pagadas por los agricultores.

Melatonin has been reported to have an important role in fruit ripening, although the effect of pre-harvest melatonin treatment on sweet cherry quality properties during storage is still unknown. In the present experiments, the effects of melatonin (0.1, 0.3, and 0.5 Mm) by foliar spray treatments of ‘Prime Giant’ and ‘Sweet Heart’ sweet cherry trees on fruit quality traits and antioxidants systems during storage was evaluated. Results showed that these treatments reduced weight losses during storage, as well as losses in firmness and titratable acidity. In addition, changes in fruit colour and total soluble solid content were also delayed in fruit from melatonin treated trees with respect to controls. Moreover, in general, total phenolic and anthocyanin concentrations were higher in fruit from treated trees than in those from control ones, either at harvest or during the whole storage period. Finally, the activity of the antioxidant enzymes catalase, ascorbate peroxidase and peroxidase was also enhanced as a consequence of melatonin treatment. Overall results show that pre-harvest melatonin treatment delayed the post-harvest ripening process of sweet cherry fruit, leading to maintenance of their quality properties in optimum levels for consumption 2 weeks more with respect to fruit from control trees. Antioxidant systems, both enzymatic and non-enzymatic ones, were also enhanced by melatonin treatments, which would account for the delay on fruit post-harvest ripening process and fruit quality maintenance during storage.

La atención hacia las personas con discapacidad, en este caso discapacidad visual, tiene una especial relevancia para lograr un contexto educativo inclusivo en cualquier universidad. Durante el periodo de confinamiento y distanciamiento social de la actual pandemia fue necesario adaptar los programas presenciales de orientación psicoeducativa a sus necesidades. El propósito de este trabajo es presentar todo el proceso seguido en la reorganización virtual de un programa de atención dirigido a estudiantes con discapacidad visual desarrollado en el Centro de Apoyo al Estudiante de la Universidad de Alicante. Se ha utilizado una metodología basada en diseño a partir de la propia práctica educativa. Los resultados confirmaron que la nueva orientación en el formato online fomentó un ambiente estimulante con interacciones altamente activas entre el orientador y los estudiantes, autorregulación conducente al aprendizaje y habilidades interpersonales y de comunicación utilizando el formato virtual. Se concluyó que una adecuada planificación, desarrollo y evaluación de este tipo de programas puede enriquecer el desarrollo psicosocial y educativo de los estudiantes. No obstante, se necesita avanzar más en la digitalización de la orientación universitaria y afianzar la modalidad online en el contexto actual, propio de una sociedad tecnológica del siglo XXI.

Resumen: Introducción: Más de 5 millones de niños han sido concebidos por técnicas de reproducción asistida (TRA) a nivel mundial. Aunque la mayoría de los autores no detecta diferencias en cuanto a desarrollo psicomotor, los resultados son aún contradictorios. Objetivo: Conocer si los niños-TRA tienen más riesgo de trastorno del neurodesarrollo y describir posibles factores de la TRA asociados. Material y métodos: Evaluación de niños concebidos por TRA hasta los 3 años de edad, nacidos de una cohorte de mujeres tratadas en la unidad de reproducción asistida de un hospital terciario desde mayo de 2012 hasta mayo de 2014; evaluación de controles pareados: siguiente recién nacido al caso concebido de forma natural, del mismo grupo de edad materna, gestacional y mismo tipo de gestación. Resultados: Hubo 243 gestaciones clínicas y nacieron 267 niños-TRA. Fueron evaluados 231 (87%). Simultáneamente se evaluaron 208/230 controles (90%). No hubo diferencias estadísticamente significativas en trastornos del neurodesarrollo (retraso global del desarrollo, trastorno del espectro autista o retraso del leguaje). El análisis estadístico multivariante de posibles factores de la TRA asociados solo mostró asociación entre transferencia de embrión congelado y retraso del lenguaje. Conclusiones: No se han detectado diferencias en trastornos del neurodesarrollo tras ajustar los resultados por edad materna, gemelaridad y otros posibles factores de confusión, lo que apoya que estos factores deben jugar un papel más importante que las propias TRA. La asociación entre transferencia de embrión congelado y retraso del lenguaje no ha sido descrita previamente. Son necesarios estudios a largo plazo en niños concebidos tras transferencia de embrión congelado para corroborar estos resultados. Abstract: Introduction: More than five million children have been conceived by assisted reproductive techniques (ART) around the world. Most authors agree that there are no differences in psychomotor development in comparison to naturally conceived children. However, these results are still contradictory. Objective: To determine whether children born from a cohort of ART-clinical gestations have a higher risk of suffering neurodevelopmental disorders in comparison to a control group. The potential associated ART-factors associated were also determined. Material and methods: The study included the assessment of children up to 3 years old conceived by ART, and born from a cohort of women treated by the reproduction unit of a public hospital from May 2012 to May 2014. A simultaneous assessment was made of matched controls, by following the newborn naturally conceived after the ART-case, of the same group of maternal age, gestational age, and type of gestation. Results: There were 243 clinical gestations and 267 ART-newborns, of which 231 were assessed (87%). A simultaneous assessment was carried out in 208/230 controls (90%). There were no differences in neurodevelopmental disorders (global developmental delay, autism spectrum or language delay). Multivariate analysis of potential ART factors only showed an association between transfer of frozen embryos with language delay that has not been previously described. Conclusions: There were no differences between groups after adjusting the results according to maternal age, multiple pregnancy, and other possible confounding factors, supporting that the role of these factors may be more relevant than the ART itself. The association between frozen embryo transfer and language delay has not been previously described. Thus, more studies are needed to confirm or refute this relationship.

Introducción: La infección nosocomial por coronavirus, del síndrome respiratorio agudo grave (SARS-CoV-2) se ha reportado sobre todo en unidades de adultos. Objetivo: Dar a conocer un reporte de casos pediátricos con infección nosocomial por SARS-CoV-2. Materiales y métodos: Se analizaron pacientes con infección nosocomial por SARS-Cov-2 vs. COVID-19, confirmados mediante reacción en cadena de la polimerasa transcriptasa inversa (RT-PCR) en tiempo real, ingresados al Hospital Infantil de México. Resultados: De un total de 163 pacientes analizados, solo 9 (5.5%) adquirieron SARS-CoV-2 durante su estancia hospitalaria. Cinco fueron del sexo masculino (55.5%) y 4 (44.4%) femenino, predominando los adolescentes (4 [44.4%]), todos mayores de 17 años. Solo uno desarrolló síndrome inflamatorio multisistémico. Analizamos 18 datos clínicos, de los cuales el síntoma más frecuente fue la fiebre, seguida de hiporexia y dolor abdominal. Discusión: La infección nosocomial por SARS-CoV-2 en pediatría se estará reportando más seguido. Conclusiones: Es necesario tener una definición más homogénea en cuanto a SARS-CoV-2 vs. COVID-19 nosocomial.

γ-Aminobutyric acid (GABA) occurs naturally at a low concentration in fruits, but can be increased following several stress events, playing a physiological effect. Lemon trees were preharvest treated with GABA at three concentrations (10, 50, and 100 mM) during two consecutive seasons (2019–2020 and 2020–2021). Fruit growth (diameter) and crop yield (kg tree−1 and number of fruits tree−1) and quality traits were evaluated at harvest. Results showed that treatments were effective at increasing lemon size (a 5% higher) and yield, especially for GABA at 100 mM, for the two assayed seasons. Thus, yield was increased between 13 and 18% with respect to the control trees for the two harvest dates. With respect to the quality traits, GABA treatments did not impact any negative effects on the quality attributes, since the total soluble solids (7–8° Brix), total acidity (5–6 g 100 g−1), and fruit firmness (13–14 N mm−1) were similar to the control fruits. Therefore, GABA applied as preharvest treatment could be considered as a potent tool to enhance the yield of lemon fruits.

Zucchini fruit are highly sensitive to low temperatures leading to significant peel depressions, increasing weight loss and making them impossible to be commercialized. In this study the effect on the reduction of chilling injury (CI) assaying different postharvest treatments to cv. Cronos was evaluated. We have compared the application of substances such as 1-methylcyclopropene (1-MCP) with the application of a natural origin compound as melatonin (MT), both with demonstrated activity against CI in different vegetal products. The effects of MT (1 mM) by dipping treatment of 1 h and 1-MCP (2400 ppb) have been evaluated on zucchini fruit during 15 days of storage at 4 °C plus 2 days at 20 °C. Treatments applied independently improved some fruit quality parameters in comparison with control fruit but were not able to manage CI even though they mitigated the impact on several parameters. However, when these two separated strategies were combined, zucchini cold tolerance increased with a synergic trend. This synergic effect affected in general all parameters but specially CI, being also the only lot in which zucchini fruit were most effectively preserved. This is the first evidence in which a clear positive effect on zucchini chilling tolerance has been obtained combining these two different strategies. In this sense, the combined effect of 1-MCP and MT could be a suitable tool to reach high quality standards and increasing shelf life under suboptimal temperatures.

Smut fungi comprise a large group of biotrophic phytopathogens infecting important crops, such as wheat and corn. U. maydis is a plant pathogenic fungus responsible for common smut in maize and teocintle. Through our analysis of the transcriptome of the yeast-to-mycelium dimorphic transition at acid pH, we determined the number of genes encoding chitin deacetylases of the fungus, and observed that the gene encoding one of them (UMAG_11922; CDA1) was the only one up-regulated. The mutation of this gene and the analysis of the mutants revealed that they contained reduced amounts of chitosan, were severely affected in their virulence, and showed aberrant mycelial morphology when grown at acid pH. When the CDA1 gene was reinserted into the mutants by the use of an autonomous replication plasmid, virulence and chitosan levels were recovered in the retro mutant strains, indicating that the CDA1 gene was involved in these features. These data revealed that chitosan plays a crucial role in the structure and morphogenesis of the cell wall during mycelial development of the fungus, and that in its absence, the cell wall becomes altered and is unable to support the stress imposed by the defense mechanism mounted on by the plant host during the infection process.

. El Tamarindo es una comunidad ubicada en la zona tének de Ciudad Valles, San Luis Potosí, México, donde la mayoría de sus habitantes consumen y abastecen sus necesidades básicas del agua de dos pozos poco profundos. El objetivo de este trabajo fue analizar las características fisicoquímicas y microbiológicas del agua, además de identificar y cuantificar la presencia de metales totales. Se realizaron muestreos por triplicado durante las épocas de estiaje, lluvias y post-lluvias. Los resultados mostraron altas concentraciones de coliformes totales y fecales en ambos pozos. También se encontraron concentraciones traza de cadmio, mercurio, estaño, plomo, talio, arsénico, zinc, cobre y níquel, los cuales pueden causar daños a la salud humana. En conclusión, el agua de los pozos de esta comunidad no tiene la calidad requerida para consumo humano y debe ser sometida a procesos de purificación o potabilización previo a su consumo y uso en actividades domésticas.

ABSTRACT The oomycete Phytophthora infestans, the causal agent of potato and tomato blight, expresses two extracellular invertases. Unlike typical fungal invertases, the P. infestans genes are not sucrose induced or glucose repressed but instead appear to be under developmental control. Transcript levels of both genes were very low in mycelia harvested from artificial medium but high in preinfection stages (sporangia, zoospores, and germinated cysts), high during biotrophic growth in leaves and tubers, and low during necrotrophy. Genome-wide analyses of metabolic enzymes and effectors indicated that this expression profile was fairly unusual, matched only by a few other enzymes, such as carbonic anhydrases and a few RXLR effectors. Genes for other metabolic enzymes were typically downregulated in the preinfection stages. Overall metabolic gene expression during the necrotrophic stage of infection clustered with artificial medium, while the biotrophic phase formed a separate cluster. Confocal microscopy of transformants expressing green fluorescent protein (GFP) fusions indicated that invertase protein resided primarily in haustoria during infection. This localization was not attributable to haustorium-specific promoter activity. Instead, the N-terminal regions of proteins containing signal peptides were sufficient to deliver proteins to haustoria. Invertase expression during leaf infection was linked to a decline in apoplastic sucrose, consistent with a role of the enzymes in plant pathogenesis. This was also suggested by the discovery that invertase genes occur across multiple orders of oomycetes but not in most animal pathogens or a mycoparasite. IMPORTANCE Oomycetes cause hundreds of diseases in economically and environmentally significant plants. How these microbes acquire host nutrients is not well understood. Many oomycetes insert specialized hyphae called haustoria into plant cells, but unlike their fungal counterparts, a role in nutrition has remained unproven. The discovery that Phytophthora invertases localize to haustoria provides the first strong evidence that these structures participate in feeding. Since regions of proteins containing signal peptides targeted proteins to the haustorium-plant interface, haustoria appear to be the primary machinery for secreting proteins during biotrophic pathogenesis. Although oomycete invertases were acquired laterally from fungi, their expression patterns have adapted to the Phytophthora lifestyle by abandoning substrate-level regulation in favor of developmental control, allowing the enzymes to be produced in anticipation of plant colonization. This study highlights how a widely distributed hydrolytic enzyme has evolved new behaviors in oomycetes.

Esta propuesta de investigación utiliza los análisis de entrevistas a profundidad y la biometría para identificar cómo impactan los estímulos olfativos relacionados con la consulta odontológica en la emoción de los sujetos investigados. Primero se realiza una explicación sobre las características inherentes a la experiencia en marketing y cómo éstas pueden generar la cascada de sensaciones, percepciones y emociones normalmente buscada en bienes y servicios con características hedónicas de consumo. Hoy el consumo de servicios odontológicos tiene varios frentes comerciales. En las diferentes especialidades se encuentran las estéticas, que normalmente, se buscan como consumo placentero. Así mismo la variable estrés, comúnmente estudiada en este servicio, genera animadversión a la consulta y se asocia a emociones negativas. El estudio identifica una de las variables que contribuye al estrés en odontología como es el estímulo olfativo y específicamente su relación con las emociones. Se concluye mediante la investigación de campo que el estímulo Olfativo a Eugenol tiene impactos identificables de estrés y emociones negativas asociadas en pacientes que tuvieron experiencias negativas en Odontología asociadas a este olor. Se demuestra que el efecto de condicionamiento clásico (Till & Priluck, 2000) por olor es claro y se identifican opciones de mejora para generar ambientes que generen experiencias placenteras en el mercado meta.

In the present research two experiments were performed to evaluate the effect of pre-harvest salicylic acid (SA), acetyl salicylic acid (ASA), and methyl salicylate (MeSa), applied as a foliar spray to pomegranate “Mollar de Elche,” on crop yield, fruit quality parameters, and bioactive compounds at harvest and during storage. In the 2017 experiment, trees were treated with SA, ASA, and MeSa at 1, 5, and 10 mM and a higher crop yield (kg tree–1 and number of harvested fruit tree–1) and quality parameters (firmness, aril color, and individual sugars and organic acids) at harvest were obtained, as well as a higher concentration of phenolics, anthocyanins, and ascorbic acid. The best results were achieved with 10 mM dose of the three assayed compounds, which was chosen for the 2018 experiment, and results for crop yield and fruit quality attributes were confirmed. These quality traits and the concentration of phenolics, anthocyanins, and ascorbic acid were maintained at higher levels in pomegranate fruit from treated trees than in controls during prolonged storage at 10°C. In addition, the effects of salicylate treatments on increasing total and individual anthocyanin concentration in pomegranate arils led to arils with a deeper red color (Graphical Abstract) and, in turn, fruit that would be more appreciated in the international market. This fact, together with the increased crop yield, would contribute to the increased profit of this crop. Thus, pre-harvest treatment with salicylates, and especially SA at 10 mM concentration, could be a safe, natural, and new tool to improve fruit quality and its content on antioxidant compounds with health beneficial effects (namely, ascorbic acid, phenolics, and anthocyanins) at harvest and during storage.

El objetivo propuesto en este trabajo fue averiguar si existe una relación entre el inicio del horario de verano en México y el número de accidentes viales, toda vez que la entrada de dicho horario produce fatiga, la cual está reportada como causal de accidentes. Se utilizó la prueba de las permutaciones y no se encontró evidencia de un aumento de accidentes asociado a la entrada del horario de verano. Las limitantes del estudio son, por un lado la inexistencia de registros de accidentes previos a la implementación del horario de verano y, por el otro, no haber controlado la hora de ocurrencia de los accidentes analizados; en futuras ocasiones se recomienda controlar esta última variable. El horario de verano en México se implementó desde 1996 y aún no se habían estudiado sus efectos sobre la accidentalidad vial; la originalidad del presente estudio radica en estudiar tales efectos. Los hallazgos sugieren que la conducción vehicular con luz natural brinda mayor seguridad incluso aunque el conductor esté fatigado.

Pineapple is meanly commercially processed. However, it is a fruit that generates a high proportion of nonedible wastes, which are rich in antioxidant compounds and have a varied aromatic profile. These characteristics turn these by-products into potential agri-food waste that can be revalued and applied in different fields such as medical, pharmaceutical, or food applications. The aim of the present work was the characterization and extraction of the volatile compounds present in two pineapple by-products (peel and core) and the subsequent evaluation of their antioxidant capacity. For this purpose, the analysis of the aromatic profile of both by-products has been carried out using the headspace solid-phase microextraction technique coupled to gas chromatography with a mass spectrometry detector (HS-SPME-GC-MS). The optimization of the extraction conditions of the volatile compounds has been validated using a Box–Behnken experimental design. In addition, a quantitative analysis was carried out to determine the contents of two important volatiles in pineapple wastes, isopentyl, and ethyl acetate. Moreover, the estimation of the antioxidant capacity of the subproducts extracts was carried out using different methods All the antioxidant assays demonstrated that pineapple subproducts are rich in easily extractable antioxidants with possible applications in the food industry.

In this study, the potential of industrial celery by-products (the stalk and root) serving as sources of aromatics and antioxidants was investigated. A headspace solid phase microextraction–gas chromatography–mass spectrometry (HS-SPME–GC–MS) procedure was optimized to isolate volatile compounds from celery by-products. A Box–Behnken experimental design was proposed to optimize the procedure through a response surface methodology. The optimal extraction conditions were found to be 1.6 g of homogenized fresh by-product at 30 °C for 60 min. Under these conditions, 26 volatile compounds in stalk and root samples were identified, monoterpenes and sesquiterpenes being the main components. The content of limonene and γ-terpinene found in the stalk was significantly higher in comparison with root samples. Total phenolic content and antioxidant activity (ABTS and FRAP) results underlined the celery wastes studied as good sources of free radical scavengers. This work suggests the potential application of these by-products in the food industry and opens new pathways to valorize celery residues, contributing to the circular economy.

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Lemon trees (Citrus limon (L.) Burm. F) were treated monthly with oxalic acid (OA) at 0.1, 0.5, and 1 mM from initial fruit growth on the tree until harvest in2019. The experiment was repeated in 2020, with the application of OA 1 mM (according to the best results of 2019). In both years, fruit from OA-treated trees and the controls were stored for 35 days at 10 °C. Results showed that all treatments reduced weight loss (WL) and maintained higher firmness, total soluble solids (TSS), and total acidity (TA) than in the controls. Meanwhile, colour (hue angle) did not show significant differences. The activity of antioxidant enzymes, catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD) in the flavedo of the fruit from the OA-treated trees was higher than in the controls at harvest and after 35 days of storage. Similarly, the total phenolic content (TPC) in the flavedo and juice of the fruit from the OA-treated trees were higher than in the controls. The increase in the activity of the antioxidant enzymes and TPC started with the first preharvest OA treatment and were maintained during fruit development on the tree until harvest. Preharvest OA treatments enhanced the antioxidant system of the lemon fruits, reducing the postharvest incidence of decay. Thus, OA could be a useful tool to increase the quality and functional properties of lemon fruits.

Es indiscutible el creciente interés que están despertando las cuestiones asociadas a la responsabilidad social (RSE), no solo desde el plano académico sino también desde una dimensión social. En este contexto pretendemos, con el presente trabajo, analizar el nivel de desarrollo y de desempeño que las pequeñas y medianas empresas pueden tener en relación con las actividades de RSE. Igualmente, se pretende indagar sobre la relación que estas actividades pueden guardar con diversos factores organizativos como diversidad de género, nivel de formación del propietario/gerente, estructura de la propiedad, el tamaño y el sector. Los resultados, de carácter exploratorio, permiten sostener que las empresas españolas tienen una actitud positiva hacia la RSE y que, por término medio, se involucran en numerosas actividades socialmente responsables, siendo el nivel de formación del gerente/propietario, el tamaño y el sector los factores que más contribuyen en la explicación del desempeño socialmente responsable de las Pymes.

The effect of melatonin pomegranate tree treatments on fruit quality and bioactive compounds with antioxidant activity at harvest and during storage at 10 °C for 60 days was assayed in two consecutive years, 2019 and 2020. In the first year, trees were treated with 0.1, 0.3 and 0.5 mM of melatonin along the developmental fruit growth cycle, and results showed that bioactive compounds (total phenolics and total and individual anthocyanins) and antioxidant activity at harvest were higher in fruits from melatonin-treated trees than in controls. Other fruit quality parameters, such as firmness, total soluble solids and aril red colour, were also increased as a consequence of melatonin treatment. In fruit from control tress, firmness and acidity levels decreased during storage, while increases occurred on total soluble solids, leading to fruit quality reductions. These changes were delayed, and even maintenance of total acidity was observed, in fruit from melatonin-treated trees with respect to controls, resulting in a fruit shelf-life increase. Moreover, concentration of phenolics and anthocyanins and antioxidant activity were maintained at higher levels in treated than in control fruits during the whole storage period. In general, all the mentioned effects were found at the highest level with the 0.1 mM melatonin dose, and then it was selected for repeating the experiment in the second year and results of the first year were confirmed. Thus, 0.1 mM melatonin treatment could be a useful tool to enhance aril content on bioactive compounds with antioxidant activity and health beneficial effects and to improve quality traits of pomegranate fruit, at harvest and during postharvest storage.