Scanning tunneling spectroscopy of layers of superconducting 2H-TaSe2_\textbf{2}: Evidence for a zero bias anomaly in single layers

We report a characterization of surfaces of the dichalcogenide TaSe$_2$ using scanning tunneling microscopy and spectroscopy (STM/S) at 150 mK. When the top layer has the 2H structure and the layer immediately below the 1T structure, we find a singular spatial dependence of the tunneling conductance below 1 K, changing from a zero bias peak on top of Se atoms to a gap in between Se atoms. The zero bias peak is additionally modulated by the commensurate $3a_0 \times 3a_0$ charge density wave of 2H-TaSe$_2$. Multilayers of 2H-TaSe$_2$ show a spatially homogeneous superconducting gap with a critical temperature also of 1 K. We discuss possible origins for the peculiar tunneling conductance in single layers.Comment: 10 pages, 10 figure

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

Meeting abstrac

Zero-bias conductance peak in detached flakes of superconducting 2 H - TaS2 probed by scanning tunneling spectroscopy

We report an anomalous tunneling conductance with a zero-bias peak in flakes of superconducting 2H-TaS2 detached through mechanical exfoliation. To explain the observed phenomenon, we construct a minimal model for a single unit cell layer of superconducting 2H-TaS2 with a simplified two-dimensional Fermi surface and a sign-changing Cooper-pair wave function induced by Coulomb repulsion. Superconductivity is induced in the central Γ pocket, where it becomes nodal. We show that weak scattering at the nodal Fermi surface, produced by nonperturbative coupling between tip and sample, gives Andreev states that lead to a zero-bias peak in the tunneling conductance. We suggest that reducing dimensionality down to crystals a few atoms thick could drive a crossover from conventional to sign-changing pairing in the superconductor 2H-TaS2.This work was supported by the Spanish MINECO (Consolider Ingenio Molecular Nanoscience CSD2007-00010 program and FIS2011-23488, ACI2009-0905, FIS2011-23713, and MAT2011-22785), by the European Union (ERC Advanced Grants No. 290846 and No. 247384, Graphene Flagship Contract No. CNECT-ICT-604391, Marie Curie Actions FP7-PEOPLE-2013-CIG-618321, and COST MP1201 action), by the Comunidad de Madrid through program Nanobiomagnet, and by the Generalidad de Valencia through programs PROMETEO and ISIC-NANO

[Translated article] Outbreak of Dermatophyte Infections on the Head and Neck Related to Shave Haircuts: Description of a Multicenter Case Series

Introduction: Since 2021, an increase in cases of tinea capitis has been detected in adolescents who shave their hair with fade haircut. Patients and methods: Multicenter retrospective observational study of cases of cephalic pole dermatophytosis with a history of having been acquired after frequent shaving in hairdressing. A call was made to dermatologists from the Spanish Academy of Dermatology and Venereology (AEDV) to provide cases observed between January 2021 and December 2022. Patients with microbiological confirmation by culture or direct examination with KOH were included. Results: 107 cases were collected, 106 of which were male. 78 non-inflammatory forms were observed, compared to 29 inflammatory. The most frequently isolated fungus was Trichophyton tonsurans (75.7% of cases). The lesions appeared predominantly on the nape of the neck and temporal area. Conclusions: The distribution by sex, age and lesional location seems to indicate that a new social trend, in which male adolescents regularly go to hairdressers to shave the occipital and temporal areas, would be the cause of this grouping of cases of ringworm of the scalp. The most frequent microorganism in our study (T. tonsurans) coincides with the most prevalent in our environment. This study shows an accumulation of cases that can be taken into account by competent Public Health agencies, which are responsible for ensuring compliance with the rules of disinfection of the material used for shaving. Resumen: Introducción: Desde 2021 se ha detectado un aumento de casos de tiñas del cuero cabelludo en adolescentes que se cortan el pelo mediante rasurado o degradado. Pacientes y métodos: Estudio observacional retrospectivo multicéntrico de casos de dermatofitosis del polo cefálico con el antecedente de haber sido contraídas tras el rasurado frecuente en peluquería. Se realizó una llamada a dermatólogos de la Academia Española de Dermatología y Venereología (AEDV) para que aportaran casos observados entre enero de 2021 y diciembre de 2022. Se incluyeron pacientes con confirmación microbiológica mediante cultivo o examen directo con KOH. Resultados: Se recogieron 107 casos, siendo 106 pacientes varones. Se observaron 78 formas no inflamatorias frente a 29 inflamatorias. El hongo aislado con mayor frecuencia fue Trichophyton tonsurans (75,7% de los casos). Las lesiones aparecieron predominantemente en la nuca y en el área temporal. Conclusiones: La distribución por sexo, edad y localización lesional parece apuntar a que una nueva tendencia social, en la que adolescentes varones acuden asiduamente a peluquerías para el afeitado de las zonas occipital y temporal, sería la causante de esta agrupación de casos de tiña del cuero cabelludo. El microorganismo más frecuente en nuestro estudio (T. tonsurans) coincide con el más prevalente en nuestro medio. Con el presente estudio se evidencia un acúmulo de casos susceptible de ser tenido en cuenta por organismos competentes de salud pública, a los cuales corresponde velar por el cumplimiento de las normas de desinfección del material empleado para el rasurado

Brote de dermatofitosis en región de cabeza y cuello asociadas al rasurado en peluquerías: estudio descriptivo multicéntrico de una serie de casos

Resumen: Introducción: Desde 2021 se ha detectado un aumento de casos de tiñas del cuero cabelludo en adolescentes que se cortan el pelo mediante rasurado o degradado. Pacientes y métodos: Estudio observacional retrospectivo multicéntrico de casos de dermatofitosis del polo cefálico con el antecedente de haber sido contraídas tras el rasurado frecuente en peluquería. Se realizó una llamada a dermatólogos de la Academia Española de Dermatología y Venereología (AEDV) para que aportaran casos observados entre enero de 2021 y diciembre de 2022. Se incluyeron pacientes con confirmación microbiológica mediante cultivo o examen directo con KOH. Resultados: Se recogieron 107 casos, siendo 106 pacientes varones. Se observaron 78 formas no inflamatorias frente a 29 inflamatorias. El hongo aislado con mayor frecuencia fue Trichophyton tonsurans (75,7% de los casos). Las lesiones aparecieron predominantemente en la nuca y en el área temporal. Conclusiones: La distribución por sexo, edad y localización lesional parece apuntar a que una nueva tendencia social, en la que adolescentes varones acuden asiduamente a peluquerías para el afeitado de las zonas occipital y temporal, sería la causante de esta agrupación de casos de tiña del cuero cabelludo. El microorganismo más frecuente en nuestro estudio (T. tonsurans) coincide con el más prevalente en nuestro medio. Con el presente estudio se evidencia un acúmulo de casos susceptible de ser tenido en cuenta por organismos competentes de salud pública, a los cuales corresponde velar por el cumplimiento de las normas de desinfección del material empleado para el rasurado. Abstract: Introduction: Since 2021, an increase in cases of tinea capitis has been detected in adolescents who shave their hair with fade haircut. Patients and methods: Multicenter retrospective observational study of cases of cephalic pole dermatophytosis with a history of having been acquired after frequent shaving in hairdressing. A call was made to dermatologists from the Spanish Academy of Dermatology and Venereology (AEDV) to provide cases observed between January 2021 and December 2022. Patients with microbiological confirmation by culture or direct examination with KOH were included. Results: 107 cases were collected, 106 of which were male. 78 non-inflammatory forms were observed, compared to 29 inflammatory. The most frequently isolated fungus was Trichophyton tonsurans (75.7% of cases). The lesions appeared predominantly on the nape of the neck and temporal area. Conclusions: The distribution by sex, age and lesional location seems to indicate that a new social trend, in which male adolescents regularly go to hairdressers to shave the occipital and temporal areas, would be the cause of this grouping of cases of ringworm of the scalp. The most frequent microorganism in our study (T. tonsurans) coincides with the most prevalent in our environment. This study shows an accumulation of cases that can be taken into account by competent Public Health agencies, which are responsible for ensuring compliance with the rules of disinfection of the material used for shaving

First Macro-Colonizers and Survivors Around Tagoro Submarine Volcano, Canary Islands, Spain

Tagoro, the youngest submarine volcano of the Canary Islands, erupted in 2011 South of El Hierro Island. Pre-existing sea floor and inhabiting biological communities were buried by the newly erupted material, promoting the appearance of new habitats. The present study pursues to describe the first metazoans colonizing different new habitats formed during the eruption and to create precedent on this field. Through dredge and remote operated vehicle samplings, five main habitat types have been detected based on the substrate type and burial status after the eruption. Inside the Tagoro volcanic complex (TVC), two new habitats are located in and around the summit and main craters—hydrothermal vents with bacterial mats and sulfurous-like fields mainly colonized by small hydrozoan colonies. Two other habitats are located downslope the TVC; new hard substrate and new mixed substrate, holding the highest biodiversity of the TVC, especially at the mixed bottoms with annelids (Chloeia cf. venusta), arthropods (Monodaeus couchii and Alpheus sp.), cnidarians (Sertularella cf. tenella), and molluscs (Neopycnodonte cochlear) as the first colonizers. An impact evaluation was done comparing the communities of those habitats with the complex and well-established community described at the stable hard substrate outside the TVC, which is constituted of highly abundant hydrozoans (Aglaophenia sp.), antipatharians (Stichopates setacea and Antipathes furcata), and colonizing epibionts (e.g., Neopycnodonte cochlear). Three years after the eruption, species numbers at Tagoro were still low compared to those occurring at similar depths outside the TVC. The first dominant species at the TVC included a large proportion of common suspension feeders of the circalittoral and bathyal hard bottoms of the area, which could have exploited the uncolonized hard bottoms and the post eruptive fertilization of water masses

Maternal urinary concentrations of bisphenol A during pregnancy are associated with global DNA methylation in cord blood of newborns in the "NELA" birth cohort.

Endocrine disrupting chemicals (EDCs) set a public health risk through disruption of normal physiological processes. The toxicoepigenetic mechanisms of developmental exposure to common EDCs, such as bisphenol A (BPA), are poorly known. The present study aimed to evaluate associations between perinatal maternal urinary concentrations of BPA, bisphenol S (BPS) and bisphenol F (BPF) and LINE-1 (long interspersed nuclear elements) and Alu (short interspersed nuclear elements, SINEs) DNA methylation levels in newborns, as surrogate markers of global DNA methylation. Data come from 318 mother-child pairs of the `Nutrition in Early Life and Asthma´ (NELA) birth cohort. Urinary bisphenol concentration was measured by dispersive liquid-liquid microextraction and ultrahigh performance liquid chromatography with tandem mass spectrometry detection. DNA methylation was quantitatively assessed by bisulphite pyrosequencing on 3 LINEs and 5 SINEs. Unadjusted linear regression analyses showed that higher concentration of maternal urinary BPA in 24th week's pregnancy was associated with an increase in LINE-1 methylation in all newborns (p = 0.01) and, particularly, in male newborns (p = 0.03). These associations remained in full adjusted models [beta = 0.09 (95 % CI = 0.03; 0.14) for all newborns; and beta = 0.10 (95 % CI = 0.03; 0.17) for males], including a non-linear association for female newborns as well (p-trend = 0.003). No associations were found between maternal concentrations of bisphenol and Alu sequences. Our results suggest that exposure to environmental levels of BPA may be associated with a modest increase in LINE-1 methylation -as a relevant marker of epigenomic stability- during human fetal development. However, any effects on global DNA methylation are likely to be small, and of uncertain biological significance