The Effect Of Flowering Synchrony And Floral Display On The Reproduction Of A Gynodioecious Alpine Cushion Plant, Silene Acaulis (Caryophyllaceae)

We tested whether floral display and flowering synchrony with conspecific neighbors affected the reproductive success of each sex in a gynodioecious species, Silene acaulis. Furthermore, we explored how varying the spatial scale and type (which sexes included in the neighborhood) of the neighborhoods used to define synchrony affected its correlation with fruit production. We observed four sites of this alpine cushion plant throughout two flowering seasons at Niwot Ridge, Colorado. Female plants had significantly higher raw fruit production and per-flower fruit set than hermaphrodites. The total number of flowers produced by an individual was positively correlated with fruit set, suggesting that individuals that produce more flowers are more likely to be pollinated. We found a positive correlation between synchrony of flowering and raw fruit production, however the mechanism behind that relationship is still unknown. Varying the spatial scale or type of neighborhood by which we calculated synchrony scores had no effect on synchrony’s relationship with fruit production, however we recommend that future studies on the effects of flowering synchrony carefully consider the effect of neighborhood size. Understanding the factors that influence the reproductive success of a gynodioecious population clarifies the processes that may influence populations’ responses to climate change

Growth and viability of Streptococcus mutans in sucrose with different concentrations of Stevia rebaudiana Bertoni

Objective To evaluate total absorbance, planktonic growth, biofilm formation, viability, metabolic activity, and pH of Streptococcus mutans UA159 cultures when different dilutions of Stevia rebaudiana Bertoni were applied and to determine the minimum inhibitory concentration (MIC) and the minimum biofilm inhibitory concentration (MBIC) of Stevia on S. mutans. Materials and methods The effects of different dilutions of Stevia (0–400 mg/ml) on S. mutans total growth, planktonic growth, biofilm formation, viability, metabolic activity, and pH during a 72-h growth period were evaluated in this in vitro study. A stock solution was prepared by mixing 10 ml of tryptic soy broth (TSB) supplemented with 1% sucrose (TSBS) and 4 g of Stevia. Results S. mutans total growth and biofilm formation decreased with reduced concentrations of Stevia. Furthermore, the MIC was 25 mg/ml and the MBIC was 6.25 mg/ml. Complete eradication of S. mutans was not observed with any of the Stevia concentrations. Planktonic growth of S. mutans was not repressed by high concentrations of Stevia and most of the Stevia concentrations generated an increased pH. Conclusion Because Stevia reduces biofilm and acid production, Stevia can be considered a non-cariogenic sweetener. Clinical relevance This study confirms the anticariogenic effect of Stevia, like it has been previously reported, but more studies on the most effective concentration are needed, and in the present study, the minimum inhibitory concentration (MIC) and the minimum biofilm inhibitory concentration (MBIC) was determined in the presence of sucrose. Additionally, this is the first study to evaluate the effect of Stevia on S. mutans metabolic activity

Comparison of next-generation portable pollution monitors to measure exposure to PM2.5 from household air pollution in Puno, Peru.

Assessment of personal exposure to PM2.5 is critical for understanding intervention effectiveness and exposure-response relationships in household air pollution studies. In this pilot study, we compared PM2.5 concentrations obtained from two next-generation personal exposure monitors (the Enhanced Children MicroPEM or ECM; and the Ultrasonic Personal Air Sampler or UPAS) to those obtained with a traditional Triplex Cyclone and SKC Air Pump (a gravimetric cyclone/pump sampler). We co-located cyclone/pumps with an ECM and UPAS to obtain 24-hour kitchen concentrations and personal exposure measurements. We measured Spearmen correlations and evaluated agreement using the Bland-Altman method. We obtained 215 filters from 72 ECM and 71 UPAS co-locations. Overall, the ECM and the UPAS had similar correlation (ECM ρ = 0.91 vs UPAS ρ = 0.88) and agreement (ECM mean difference of 121.7 µg/m3 vs UPAS mean difference of 93.9 µg/m3 ) with overlapping confidence intervals when compared against the cyclone/pump. When adjusted for the limit of detection, agreement between the devices and the cyclone/pump was also similar for all samples (ECM mean difference of 68.8 µg/m3 vs UPAS mean difference of 65.4 µg/m3 ) and personal exposure samples (ECM mean difference of -3.8 µg/m3 vs UPAS mean difference of -12.9 µg/m3 ). Both the ECM and UPAS produced comparable measurements when compared against a cyclone/pump setup

La construcción social de la "enfermedad de los nervios”: un síndrome cultural consecuencia de las violencias del conflicto armado sufridas por individuos de tres poblaciones rurales del Suroccidente de Colombia

This article presents the results of an ethnoepidemiological study on the cultural syndrome “the disease of the nerves”, that describes the way in which some members of rural populations of the south west of Colombia, who have suffered directly the violence of the armed actors in the Colombian conflict, have culturally constructed this syndrome from their experiences, the meaning they give it and the language of the symptoms they create, which allows them to communicate and describe their pain, anguish and sadness, as well as their understanding and way of communicating, live and overcome their sufferings and adversities. The study is based on a qualitative ethnographic methodology. The data collection techniques were participant observation, in-depth interviews and life stories. For data analysis, we proceeded to search for culturally constructed categories based on a pragmatic semantic model that allowed the content analysis to be organized. In the population interviewed, it was observed that the high level of resilience was presented in less than half of the sample, thus leaving more than 60 % of the people with mental and emotional problems inherent to the war, including post-traumatic stress. This work allows us to state that the ethnomedicine of these populations has responded to the aggressions of violence by armed actors, creating diagnostic and healing systems that are reflected in cultural syndromes such as “nerve disease”. A significant number of the people interviewed show long-term affectations that it is important to investigate with interdisciplinary teams that can understand the bio-psycho-social context that the peasant communities of the Colombian southwest have lived and are experiencing, and thus be able to elaborate appropriate interventions in the specific cultural contexts.En el texto se presentan los resultados de un estudio etnoepidemiológico  sobre el síndrome cultural la “enfermedad de los nervios”, que describe la manera como algunos miembros de poblaciones rurales del suroccidente de Colombia, que han sufrido de manera directa las violencias de los actores armados en el conflicto colombiano, han construido culturalmente este síndrome a partir de sus experiencias, el significado que le otorgan y el lenguaje de los síntomas que crean, lo cual les permite comunicar y describir sus dolores, angustias y tristezas, así como su comprensión y la manera de comunicar, vivir y superar los sufrimientos y las adversidades. El estudio se basa en una metodología cualitativa de tipo etnográfica. Las técnicas de recolección de datos fueron la observación participante, las entrevistas en profundidad y las historias de vida. Para el análisis de datos se procedió a la búsqueda de las categorías construidas culturalmente, basados en un modelo pragmático semántico que permitió organizar el análisis de contenido. En la población entrevistada se pudo apreciar que el nivel alto de resiliencia se presentó en menos de la mitad de la muestra, dejando así más del 60 % de las personas con problemas psíquicos y emocionales inherentes a la guerra; entre ellos, estrés postraumático. Este trabajo permite plantear que la etnomedicina de estas poblaciones ha respondido a las agresiones de la violencia de los actores armados creando sistemas de diagnóstico y curación que se reflejan en síndromes culturales como la “enfermedad de los nervios”. Un número importante de las personas entrevistadas muestra afectaciones de larga duración que es importante investigar con equipos interdisciplinarios que puedan entender el contexto bio-psico-social que han vivido y viven las comunidades campesinas del Suroccidente Colombiano, y así poder elaborar intervenciones adecuadas a los contextos culturales específicos

Identification of SNPs and INDELS in swine transcribed sequences using short oligonucleotide microarrays

<p>Abstract</p> <p>Background</p> <p>Genome-wide detection of single feature polymorphisms (SFP) in swine using transcriptome profiling of day 25 placental RNA by contrasting probe intensities from either Meishan or an occidental composite breed with Affymetrix porcine microarrays is presented. A linear mixed model analysis was used to identify significant breed-by-probe interactions.</p> <p>Results</p> <p>Gene specific linear mixed models were fit to each of the log₂transformed probe intensities on these arrays, using fixed effects for breed, probe, breed-by-probe interaction, and a random effect for array. After surveying the day 25 placental transcriptome, 857 probes with a q-value ≤ 0.05 and |fold change| ≥ 2 for the breed-by-probe interaction were identified as candidates containing SFP. To address the quality of the bioinformatics approach, universal pyrosequencing assays were designed from Affymetrix exemplar sequences to independently assess polymorphisms within a subset of probes for validation. Additionally probes were randomly selected for sequencing to determine an unbiased confirmation rate. In most cases, the 25-mer probe sequence printed on the microarray diverged from Meishan, not occidental crosses. This analysis was used to define a set of highly reliable predicted SFPs according to their probability scores.</p> <p>Conclusion</p> <p>By applying a SFP detection method to two mammalian breeds for the first time, we detected transition and transversion single nucleotide polymorphisms, as well as insertions/deletions which can be used to rapidly develop markers for genetic mapping and association analysis in species where high density genotyping platforms are otherwise unavailable.</p> <p>SNPs and INDELS discovered by this approach have been publicly deposited in NCBI's SNP repository dbSNP. This method is an attractive bioinformatics tool for uncovering breed-by-probe interactions, for rapidly identifying expressed SNPs, for investigating potential functional correlations between gene expression and breed polymorphisms, and is robust enough to be used on any Affymetrix gene expression platform.</p

Point‑of‑care ultrasound in cardiorespiratory arrest (POCUS‑CA): narrative review article.

The POCUS-CA (Point-of-care ultrasound in cardiac arrest) is a diagnostic tool in the Intensive Care Unit and Emergency Department setting. The literature indicates that in the patient in a cardiorespiratory arrest it can provide information of the etiology of the arrest in patients with non-defibrillable rhythms, assess the quality of compressions during cardiopulmonary resuscitation (CPR), and define prognosis of survival according to specific findings and, thus, assist the clinician in decision-making during resuscitation. This narrative review of the literature aims to expose the usefulness of ultrasound in the setting of cardiorespiratory arrest as a tool that allows making a rapid diagnosis and making decisions about reversible causes of this entity. More studies are needed to support the evidence to make ultrasound part of the resuscitation algorithms. Teamwork during cardiopulmonary resuscitation and the inclusion of ultrasound in a multidisciplinary approach is important to achieve a favorable clinical outcomepost-print2391 K

Detection of transcriptional difference of porcine imprinted genes using different microarray platforms

BACKGROUND: Presently, multiple options exist for conducting gene expression profiling studies in swine. In order to determine the performance of some of the existing microarrays, Affymetrix Porcine, Affymetrix Human U133+2.0, and the U.S. Pig Genome Coordination Program spotted glass oligonucleotide microarrays were compared for their reproducibility, coverage, platform independent and dependent sensitivity using fibroblast cell lines derived from control and parthenogenic porcine embryos. RESULTS: Array group correlations between technical replicates demonstrated comparable reproducibility in both Affymetrix arrays. Glass oligonucleotide arrays showed greater variability and, in addition, approximately 10% of probes had to be discarded due to slide printing defects. Probe level analysis of Affymetrix Human arrays revealed significant variability within probe sets due to the effects of cross-species hybridization. Affymetrix Porcine arrays identified the greatest number of differentially expressed genes amongst probes common to all arrays, a measure of platform sensitivity. Affymetrix Porcine arrays also identified the greatest number of differentially expressed known imprinted genes using all probes on each array, an ad hoc measure of realistic performance for this particular experiment. CONCLUSION: We conclude that of the platforms currently available and tested, the Affymetrix Porcine array is the most sensitive and reproducible microarray for swine genomic studies

Assessing a low-cost methane sensor quantification system for use in complex rural and urban environments

Low-cost sensors have the potential to facilitate the exploration of air quality issues on new temporal and spatial scales. Here we evaluate a low-cost sensor quantification system for methane through its use in two different deployments. The first was a 1-month deployment along the Colorado Front Range and included sites near active oil and gas operations in the Denver-Julesburg basin. The second deployment was in an urban Los Angeles neighborhood, subject to complex mixtures of air pollution sources including oil operations. Given its role as a potent greenhouse gas, new low-cost methods for detecting and monitoring methane may aid in protecting human and environmental health. In this paper, we assess a number of linear calibration models used to convert raw sensor signals into ppm concentration values. We also examine different choices that can be made during calibration and data processing and explore cross sensitivities that impact this sensor type. The results illustrate the accuracy of the Figaro TGS 2600 sensor when methane is quantified from raw signals using the techniques described. The results also demonstrate the value of these tools for examining air quality trends and events on small spatial and temporal scales as well as their ability to characterize an area – highlighting their potential to provide preliminary data that can inform more targeted measurements or supplement existing monitoring networks

Drainage And Sedimentary Response Of The Northern Andes And The Pebas System To Miocene Strike-slip Tectonics: A Source To Sink Study Of The Magdalena Basin

Miocene strike-slip tectonics was responsible for creating and closing short-lived (ca. 6 Ma) passages and the emergence of isolated topography in the Northern Andes. These geological events likely influenced the migration and/or isolation of biological populations. To better understand the paleogeography of the Miocene hinterland and foreland regions in the Northern Andes, we conducted a source-to-sink approach in the Magdalena Basin. This basin is located between the Central and Eastern Cordilleras of Colombia and contains an ample Miocene record, which includes Lower Miocene fine-grained strata and Middle Miocene to Pliocene coarsening-up strata. Our study presents a new data set that includes detrital U–Pb zircon ages (15 samples), sandstone petrography (45 samples) and low-temperature thermochronology from the Southern Central Cordillera (19 dates); which together with previously published data were used to construct a paleogeographical model of the Miocene hinterland and foreland regions in the Northern Andes. The evolution of the Magdalena Basin during the Miocene was characterized by playa and permanent lake systems at ca. 17.5 Ma, which may be related to a marine incursion into NW South America and western Amazonia. The appearance of Eocene to Miocene volcanic sources in the Honda Group after ca. 16 Ma suggests the development of fluvial passages, which connected the Pacific with the western Amazonia and Caribbean regions. These passages were synchronous with a time of Miocene exhumation and topographic growth (ca. 16 to 10 Ma) in the Central Cordillera and the transition from lacustrine to fluvial deposition in the Magdalena Basin. Middle to Late Miocene strike-slip deformation promoted by oblique plate convergence and the oblique collision of the Panamá-Chocó Block likely explains the synchronous along-strike fragmentation and exhumation in the Central Cordillera

Efecto de la complementación con micronutrientes antioxidantes durante la gestación sobre la regulación epigenética de genes relacionados con estrés oxidativo en el niño menor de 2 años

En el presente estudio se analizo el grado de metilación de regiones promotoras de genes asociados con estrés oxidativo en el niño menor de dos años, bajo la hipotesis de que estas regiones pueden ser modificadas por la complementación con micronutrientes antioxidantes en la mujer durante la gestación. Se analizaron muestras de sangre de neonatos de madres que fueron intervenidas con micronutrientes durante el periodo gestacional . Se utilizó el método de PCR en tiempo real para metilación “EpiTect Methyl II PCR Arrays”. Nuestros resultados mostraron que la región promotora del gen FLT1, relacionado con la respuesta celular al estímulo del factor de crecimiento endotelial vascular, presentó alto grado de metilación en las muestras de neonatos cuyas madres durante la gestación fueron complementadas con micronutrientes antioxidantes versus madres no complementadas. Otro interesante resultado de nuestro análisis fue la alta metilacion de la región promotora del gen SIRT1 en las muestras de neonatos cuyas madres recibieron el tratamiento con antioxidantes. El gen SIRT1 codifica la enzima desacetilasa Sirtuina1. De otro lado, el haber logrado estandarizar en nuestro laboratorio de Bioquímica y Nutrición, adscrito a la Facultad de Salud de la Universidad del Valle, la novedosa técnica de arreglos para PCR por cuantificación por PCR en tiempo real (EpiTect Methyl II PCR Arrays), nos permitió no solo la detección eficiente del estado de metilación de un gran número de genes de manera simultánea, superando el poder de análisis de técnicas epigenéticas como la secuenciación de la región promotora post-tratamiento con bisulfito, sino también, nos hace pioneros en el país, en la aplicación de esta técnica genómica para la investigación básica en búsqueda de biomarcadores candidatos a nivel epigenético por ontología génica (GO)