The HIHI- and H2H_{2}-to-stellar mass correlations of late- and early-type galaxies and their consistency with the observational mass functions

We compile and carrefully homogenize local galaxy samples with available information on stellar, $\rm HI$ and/or $\rm H_{2}$ masses, and morphology. After processing the information on upper limits in the case of non gas detections, we determine the $\rm HI$- and $\rm H_{2}$-to-stellar mass relations and their $1\sigma$ scatter for both late- and early-type galaxies. The obtained relations are fitted to single or double power laws. Late-type galaxies are significantly gas richer than early-type ones, specially at high masses. The respective $\rm H_{2}$-to-$\rm HI$ mass ratios as a function of $M_{\ast}$ are discussed. Further, we constrain the full mass-dependent distribution functions of the $\rm HI$- and $\rm H_{2}$-to-stellar mass ratios. We find that they can be described by a Schechter function for late types and a (broken) Schechter + uniform function for early types. By using the observed galaxy stellar mass function and the volume-complete late-to-early-type galaxy ratio as a function of $M_{\ast}$, these empirical distribution functions are mapped into $\rm HI$ and $\rm H_{2}$ mass functions. The obtained mass functions are consistent with those inferred from large surveys. The empirical gas-to-stellar mass relations and their distributions for local late- and early-type galaxies presented here can be used to constrain models and simulations of galaxy evolution.Comment: 43 pages, 18 figures, to appear in RMxAA. Minor corrections introduced. The presented results are optimal for comparisons with theoretical predictions. Py-code to generate the HI- and H2-to-stellar mass relations and their 1sigma scatter, as well as the full mass-dependent distribution functions of the MHI/Ms and MH2/Ms ratios are available upon request to A.R. Calett

La ficción en la televisión generalista norteamericana y la representación de (nuevas) masculinidades

The text offers a tour through different representations of male characters in American generalist television that are beyond the classical representation of the male characters that were depicted as traditionally strong characters, courageous and machos. Considering how American television fiction has a maximum expan­sion –not only in the US but, also for its strong presence in all Western television, in Spain– we could see the impact that these representations can make in the public in order to build new identitarian points of referen­ce of the masculine, masculinity and virility.En el texto se hace un recorrido por diferentes representaciones de personajes masculinos en la televi­sión generalista norteamericana que se escapan a la representación clásica de los personajes masculi­nos que tradicionalmente eran representados como personajes fuertes, valerosos y machos. Teniendo en cuenta cómo la ficción televisiva norteamericana cuenta con una máxima expansión –no solamente en Estados Unidos sino también, por su gran presencia en todas las televisiones occidentales, en España– podríamos ver la repercusión que dichas representaciones pueden tener en los públicos en orden a cons­truir nuevos imaginarios y nuevas referencias identitarias de lo masculino, la masculinidad y la virilidad

Biology of Stress and Physical Performance

Regular physical training leads to physical capacity and optimal sports performance, and although this relationship is usually linear, the athlete’s adaptation is conditioned by multiple factors: environmental, genetic and psychological. Studies have shown that between 70 and 85% of successful and unsuccessful athletes can be identified using psychological measures of personality and mood, a level higher than chance, but insufficient for the purpose of selecting athletes. The research indicates that the mood of the athletes exhibits a dose-response relationship with their adaptation to the training load; This finding has shown potential to reduce the incidence of overtraining syndrome in athletes who undergo rigorous physical training, through early detection using scales of perception of their mood and physiological measures such as the testosterone / cortisol index. Thus, the genetic and epigenetic modifications of the factors that regulate the hypothalamic-pituitary-adrenal axis and, therefore, the response to stress, have recently been associated with a detrimental effect on physical performance and early manifestations of the overtraining syndrome and the abandonment of training and competences

Diferencias en la distribución de las variantes de hemoglobina según las regiones geográficas en una población colombiana

Introducción Colombia ha estado Introducción Colombia ha estado sometida a intensas corrientes genéticas y culturales debido a su ubicación geográfica. Las hemoglobinopatías son las enfermedades recesivas más frecuentes en todo el mundo y representan un importante problema de salud pública, según la región y la ascendencia de cada país. Objetivos Evaluar la frecuencia de variantes de hemoglobina según la región geográfica en un grupo poblacional ajustado por sexo y edad en Colombia. Métodos Fue un estudio descriptivo retrospectivo de variantes de hemoglobina realizado por electroforesis en pacientes atendidos y/o remitidos a instituciones de atención especializada en Bogotá, Colombia entre enero de 2009 y diciembre de 2020. Resultados Se analizaron 2.224 resultados, 48,4% hombres y 51,5% mujeres; 63,3% de los pacientes fueron sin alteraciones, 14,3% presentaron talasemia, 17,3%, HbS, 2,3%, HbS/C, 1,8%, HbC, 0,5%, HbE y 0,5% HbF persistente, siendo la HbS más prevalente en hombres (p = 0,005). Al evaluar las regiones geográficas de Colombia, se encontró una mayor prevalencia de HbS en las regiones Pacífica (p = 0,005) y Caribe, mientras que la Talasemia y la HbS fueron más prevalentes en las regiones Andina y Orinoquia, y fue raro encontrar alguna hemoglobinopatía (p = 0,0001) en la región Amazónica. Conclusiones Las principales hemoglobinopatías encontradas en Colombia son la HbS, predominantemente en varones, y la Talasemia. La distribución de las hemoglobinopatías en las diferentes regiones geográficas de Colombia está influenciada por la ancestralidad.Sujeta a intensas corrientes genéticas y culturales debido a su ubicación geográfica. Las hemoglobinopatías son las enfermedades recesivas más frecuentes a nivel mundial y representan un importante problema de salud pública, según la región y la ancestralidad de cada país. Objetivos Evaluar la frecuencia de variantes de hemoglobina según la región geográfica en un grupo poblacional ajustado por sexo y edad en Colombia. Métodos Fue un estudio descriptivo retrospectivo de variantes de hemoglobina realizado por electroforesis en pacientes atendidos y/o remitidos a instituciones de atención especializada en Bogotá, Colombia entre enero de 2009 y diciembre de 2020. Resultados Se analizaron 2.224 resultados, 48,4% hombres y 51,5% mujeres; 63,3% de los pacientes fueron sin alteraciones, 14,3% presentaron talasemia, 17,3%, HbS, 2,3%, HbS/C, 1,8%, HbC, 0,5%, HbE y 0,5% HbF persistente, siendo la HbS más prevalente en hombres (p = 0,005). Al evaluar las regiones geográficas de Colombia, se encontró una mayor prevalencia de HbS en las regiones Pacífica (p = 0,005) y Caribe, mientras que la Talasemia y la HbS fueron más prevalentes en las regiones Andina y Orinoquia, y fue raro encontrar alguna hemoglobinopatía (p = 0,0001) en la región Amazónica. Conclusiones Las principales hemoglobinopatías encontradas en Colombia son la HbS, predominantemente en varones, y la Talasemia. La distribución de las hemoglobinopatías en las diferentes regiones geográficas de Colombia está influenciada por la ascendencia.Introduction Colombia has been Introduction Colombia has been subject to intense genetic and cultural currents due to its geographical location. Hemoglobinopathies are the most common recessive diseases found worldwide and represent an important public health problem, according to the region and ancestry of each country. Objectives To evaluate the frequency of hemoglobin variants according to the geographical region in a population group adjusted to sex and age in Colombia. Methods This was a descriptive retrospective study of hemoglobin variants performed by electrophoresis in patients treated at and/or referred to specialized care institutions in Bogota, Colombia between January 2009 and December 2020. Results A total of 2,224 results were analyzed, 48.4% male and 51.5% female; 63.3% of patients were without alterations, 14.3% presented with thalassemia, 17.3%, HbS, 2.3%, HbS/C, 1.8%, HbC, 0.5%, HbE and 0.5% persistent HbF, with HbS being more prevalent in males (p = 0.005). When assessing the geographical regions of Colombia, a higher prevalence of HbS was found in the Pacific (p = 0.005) and Caribbean regions, while Thalassemia and HbS were more prevalent in the Andean and Orinoquia regions, and it was rare to find any hemoglobinopathies (p = 0.0001) in the Amazonian region. Conclusions The main hemoglobinopathies found in Colombia are HbS, predominantly in males, and Thalassemia. The distribution of hemoglobinopathies in different geographical regions of Colombia is influenced by ancestry.subject to intense genetic and cultural currents due to its geographical location. Hemoglobinopathies are the most common recessive diseases found worldwide and represent an important public health problem, according to the region and ancestry of each country. Objectives To evaluate the frequency of hemoglobin variants according to the geographical region in a population group adjusted to sex and age in Colombia. Methods This was a descriptive retrospective study of hemoglobin variants performed by electrophoresis in patients treated at and/or referred to specialized care institutions in Bogota, Colombia between January 2009 and December 2020. Results A total of 2,224 results were analyzed, 48.4% male and 51.5% female; 63.3% of patients were without alterations, 14.3% presented with thalassemia, 17.3%, HbS, 2.3%, HbS/C, 1.8%, HbC, 0.5%, HbE and 0.5% persistent HbF, with HbS being more prevalent in males (p = 0.005). When assessing the geographical regions of Colombia, a higher prevalence of HbS was found in the Pacific (p = 0.005) and Caribbean regions, while Thalassemia and HbS were more prevalent in the Andean and Orinoquia regions, and it was rare to find any hemoglobinopathies (p = 0.0001) in the Amazonian region. Conclusions The main hemoglobinopathies found in Colombia are HbS, predominantly in males, and Thalassemia. The distribution of hemoglobinopathies in different geographical regions of Colombia is influenced by ancestry

Marginal bone loss around implants placed in maxillary native bone or grafted sinuses: a retrospective cohort study

Objectives To assess differences in marginal bone loss around implants placed in maxillary pristine bone and implants placed following maxillary sinus augmentation over a period of 3 years after functional loading. Material and methods Two cohorts of subjects (Group 1: Subjects who received sinus augmentation with simultaneous implant placement; Group 2: Subjects who underwent conventional implant placement in posterior maxillary pristine bone) were included in this retrospective study. Radiographic marginal bone loss was measured around one implant per patient on digitized panoramic radiographs that were obtained at the time of prosthesis delivery (baseline) and 12, 24, and 36 months later. The influence of age, gender, smoking habits, history of periodontal disease, and type of prosthetic connection (internal or external) on marginal bone loss was analyzed in function of the type of osseous support (previously grafted or pristine). Results A total of 105 subjects were included in this study. Cumulative radiographic marginal bone loss ranged from 0 mm to 3.9 mm after 36 months of functional loading. There were statistically significant differences in marginal bone loss between implants placed in grafted and pristine bone at the 12‐month assessment, but not in the subsequent progression rate. External prosthetic connection, smoking, and history of periodontitis negatively influenced peri‐implant bone maintenance, regardless of the type of osseous substrate. Conclusions Implants placed in sites that received maxillary sinus augmentation exhibited more marginal bone loss than implants placed in pristine bone, although marginal bone loss mainly occurred during the first 12 months after functional loading. Implants with external implant connection were strongly associated with increased marginal bone loss overtime.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/102685/1/clr12122.pd

Experimental Infection and Detection of Necrotizing Hepatopancreatitis Bacterium in the American Lobster Homarus americanus

Necrotizing hepatopancreatitis bacterium (NHPB) is an obligated intracellular bacteria causing severe hepatopancreatic damages and mass mortalities in penaeid shrimp. The worldwide distribution of penaeid shrimp as alien species threatens the life cycle of other crustacean species. The aim of the experiment was to evaluate the possibility of experimentally infecting the American lobster (Homarus americanus) with NHPB extracted from shrimp hepatopancreas. Homogenates from infected shrimp were fed by force to lobsters. Other group of lobsters was fed with homogenates of NHPB-free hepatopancreas. After the 15th day from initial inoculation, the presence of NHPB was detected by polymerase chain reaction in feces and hepatopancreas from lobsters inoculated with infected homogenates. Necrotized spots were observed in the surface of lobster hepatopancreas. In contrast, lobsters fed on NHPB-free homogenates resulted negative for NHPB. Evidence suggests the plasticity of NHPB which can infect crustacean from different species and inhabiting diverse latitudes. Considering the results, the American lobster could be a good candidate to maintain available NHPB in vivo

Prevalencia y factores de riesgo asociados a sífilis en mujeres

INTRODUCTION: Although the incidence of syphilis is generally low, it remains an important global public health problem, given its interaction with other sexually transmitted diseases (STDs). It has been shown that syphilis, due to the genital ulcers it produces, is a co-factor for acquiring other STDs, principally those of viral origin such as herpes simples type 2, hepatitis B and HIV. Many female commercial sex workers (FCSW) in Mexico have been found to have acquired good levels of knowledge about STD prevention. Nevertheless, they constitute a heterogeneous group in terms of socio-economic level, health status and type of work site; these factors in turn appear to determine their attitudes, knowledge and behavior related to acquiring and transmitting STDs, including syphilis. This study, therefore, focused on the factors associated with Treponema pallidum infection in this group of women. METHOD: Based on a sample frame of sites where female commercial sex work takes place within Mexico City, a sample of 807 FCSWs was selected; after providing informed consent, they completed a structured questionnaire. A blood sample for identifying serologic markers for STDs was collected and analyzed according to a procedure manual for STD diagnosis. Treponema pallidum was diagnosed using the RPR (Bigaux Diagnostica) screening test, and FTA - ABS (Pasteur Diagnostics) for confirmation. RESULTS: The prevalence of syphilis in this sample of FCSWs was 6.4% (52/807), and was higher among women who worked at street sites than among those who worked in massage parlors. The age of the women interviewed ranged from 17 to 58 years, with a mean of 29.2 years (SD 7.3 years); syphilis was more prevalent among women over 30 years of age. Age at first sexual intercourse ranged from 11 to 30 years, with a mean of 16 years (SD 3.1 years), which is similar to that of the general female population in Mexico. Predictive factors for T. pallidum infection, determined adjusted logistic regression, included: tupe of by work site (bar and street sites); socio-economic level (middle and low); age (over 30 years); duration of involvement in sex work (>; 5 years) and number of clients per week (>; 10). CONCLUSION: In spite of some limitations regarding statistical precision, this study shows that FCSWs are heterogeneous in terms of risk of acquiring STDs, including syphilis; the principal differentiating factor was shown to be the type of work site. Given that it is not belonging to a risk group but rather participating in risky practices that leads to acquiring STDs, situations that facilitate riskier or safer practices (such as type of sex work site, for sex workers) should be taken into account when studying people's risk level. STD prevention campaigns must also consider these factors, in addition to focusing on FCSWs and their clients and personal partners, so that all involved assume their responsibility for safer sex.INTRODUCCIÓN: Se ha demostrado que la sífilis, debido a la ulceración genital que produce, es un cofactor asociado para adquirir otras enfermedades de transmisión sexual (ETS), principalmente de origen viral como herpes tipo-2, hepatitis B, y el VIH. Aunque las mujeres trabajadoras del sexo comercial (MTSC) han adquirido mejores conocimientos para prevenir las ETS, constituyen un grupo que por su heterogenicidad en términos de condición socioeconómica, estado de salud, ambiente y sitio de trabajo, manifiestan diferentes actitudes y conocimientos que hacen latente la posibilidad de adquirir y transmitir ETS incluyendo sífilis, por lo que lo estudio hace un acercamiento hacia los factores asociados a infección por Treponema pallidum en este grupo de mujeres. MÉTODO: Basado en un marco muestral, que identifica sitios donde se practica el comercio sexual femenino en la ciudad de México, se seleccionó una muestra de 807 MTSC, a quienes previo consentimiento informado, se entrevistó para que respondieran un cuestionario estructurado. Se obtuvo una muestra sanguínea para la identificación de diversos marcadores serológicos de ETS de acuerdo al manual de procedimientos para el diagnóstico de ETS. Para el diagnóstico de Treponema pallidum se utilizó una prueba de tamizaje de RPR (Bigaux Diagnóstica), y prueba confirmatoria de FTA-ABS (Pasteur Diagnostics). RESULTADOS: Las prevalencias de sífilis en la muestra de MTSC fue de 6,4% (52/807), siendo mayor en quienes trabajaban en sitios de calle comparadas con aquellas de estéticas. La edad de las mujeres entrevistadas osciló entre 17 y 58 años con una media de 29,2 años (d.s. 7,3 años). La prevalencia de sífilis fue mayor en los grupos etáreos mayores de 30 anos. La edad de inicio de relaciones sexuales varió desde 11 hasta 30 anos con una media de 16 años (d.s. 3,1 años). Los factores predictores de infección por T. pallidum, determinados mediante regresión logística ajustada, fueron: sitio de trabajo (bar y puntos de calle), NSE (medio y bajo), edad (mayores de 30 anos), antiguedad en el trabajo sexual (>; 5 años), y número de clientes en una semana (>;10). CONCLUSIONES: A pesar de las limitaciones de precisión estadística, queda demostrado que existe una heterogenicidad de MTSC, diferenciado principalmente por el sitio donde se desempeñan. Debe entenderse que más que grupos de riesgo de adquirir y transmitir ETS, existen prácticas sexuales de riesgo en cualquier individuo que tiene relaciones sexuales, que aunadas a infecciones predisponentes como sífilis, facilitan la transmisibilidad de otras ETS. Por lo tanto, las campañas de prevención y fomento de uso de condón, deben orientarse no sólo a las MTSC sino también a sus clientes y parejas, con la finalidad de que todos asuman la responsabilidad del sexo seguro

GRB 221009A: A light dark matter burst or an extremely bright Inverse Compton component?

Gamma-ray bursts (GRBs) have been considered as potential very high-energy photon emitters due to the large amount of energy released as well as the strong magnetic fields involved in their jets. However, the detection of TeV photons is not expected from bursts beyond a redshift of $z\gtrsim 0.1$ due to their attenuation with the extragalactic background light (EBL). For these reasons, the recent observation of photons with energies of 18 and 251 TeV from GRB 221009A (z=0.151) last October 9th, 2022 has challenged what we know about the TeV-emission mechanisms and the extragalactic background. In order to explain the TeV observations, recent works exploring candidates of dark matter have started to appear. In this paper, we discuss the required conditions and limitations within the most plausible scenario, synchrotron-self Compton (SSC) radiation in the GRB afterglow, to interpret the one 18-TeV photon observation besides the EBL. To avoid the Klein-Nishina effect, we find an improbable value of the microphysical magnetic parameter below $10^{-6}$ for a circumburst medium value $> 1{\rm cm^{-3}}$ (expected in the collapsar scenario). Therefore, we explore possible scenarios in terms of ALPs and dark photon mechanisms to interpret this highly-energetic photon and we discuss the implications in the GRB energetics. We find that the ALPs and dark photon scenarios can explain the 18 TeV photon but not the 251 TeV photon.Comment: 15 pages, 5 figures, 4 table