Powerful Yet Lonely: Is 3C 297 a High-redshift Fossil Group?

The environment of the high-redshift (z = 1.408), powerful radio-loud galaxy 3C 297 has several distinctive features of a galaxy cluster. Among them, a characteristic halo of hot gas revealed by Chandra X-ray observations. In addition, a radio map obtained with the Very Large Array shows a bright hotspot in the northwestern direction, created by the interaction of the active galactic nucleus (AGN) jet arising from 3C 297 with its environment. In the X-ray images, emission cospatial with the northwestern radio lobe is detected, and peaks at the position of the radio hotspot. The extended, complex X-ray emission observed with our new Chandra data is largely unrelated to its radio structure. Despite having attributes of a galaxy cluster, no companion galaxies have been identified from 39 new spectra of neighboring targets of 3C 297 obtained with the Gemini Multi-Object Spectrograph. None of the 19 galaxies for which a redshift was determined lies at the same distance as 3C 297. The optical spectral analysis of the new Gemini spectrum of 3C 297 reveals an isolated Type II radio-loud AGN. We also detected line broadening in [O ii] λ3728 with a FWHM about 1700 km s−1 and possible line shifts of up to 500–600 km s−1. We postulate that the host galaxy of 3C 297 is a fossil group, in which most of the stellar mass has merged into a single object, leaving behind an X-ray halo

PDBe-KB: a community-driven resource for structural and functional annotations.

The Protein Data Bank in Europe-Knowledge Base (PDBe-KB, https://pdbe-kb.org) is a community-driven, collaborative resource for literature-derived, manually curated and computationally predicted structural and functional annotations of macromolecular structure data, contained in the Protein Data Bank (PDB). The goal of PDBe-KB is two-fold: (i) to increase the visibility and reduce the fragmentation of annotations contributed by specialist data resources, and to make these data more findable, accessible, interoperable and reusable (FAIR) and (ii) to place macromolecular structure data in their biological context, thus facilitating their use by the broader scientific community in fundamental and applied research. Here, we describe the guidelines of this collaborative effort, the current status of contributed data, and the PDBe-KB infrastructure, which includes the data exchange format, the deposition system for added value annotations, the distributable database containing the assembled data, and programmatic access endpoints. We also describe a series of novel web-pages-the PDBe-KB aggregated views of structure data-which combine information on macromolecular structures from many PDB entries. We have recently released the first set of pages in this series, which provide an overview of available structural and functional information for a protein of interest, referenced by a UniProtKB accession

Insight into the Role of Ligands in the Yellow Luminescence of Zinc Oxide Nanocrystals

International audienceHollow nanocapsules (named Hybridosomes®) possessing a polymer/nanoparticles shell were used to covalently construct hybrid films in a one-pot fashion. Alkyne bearing organic/inorganic Hybridosomes® were reticulated with azide bearing homobifunctional polyethyleneglycol (PEG) linkers, by using an electro-click reaction on F-SnO2 (FTO) electrodes. The coatings were obtained by promoting the Cu(I)-catalyzed click reaction between alkyne and azide moieties in the vicinity of the electrode by the electrochemical generation of Cu(I) ions. The physicochemical properties of the covalently reticulated hybrid films obtained were studied by SEM, AFM, UV-Vis and fluorescence spectroscopy. The one-pot covalent click reaction between the nanocapsules and the PEG linkers in the film did not affect the desirable features of the Hybridosomes® i.e. their hollow nanostructure their chemical versatility and their pH-sensitivity. Consequently, both the composition and the cargo-loading of Hybridosomes® films could be tuned, demonstrating the versatility of these hybrid coatings. As an example, Hybridosome® films were used to encapsulate and release a bodipy fluorescent probe in response to either a pH drop or the application of an oxidative +1V potential (vs Ag/AgCl) at the substrate. By bringing the field of electro-synthesized films a step further toward the design of complex physicochemical interfaces, these results open perspectives for multifunctional coatings where a chemical versatility, a controllable stability and a hollow nanostructure are required

Psicología Social Comunitaria en perspectiva: Acompañamiento, investigación y formación

In our America, Community Social Psychology (CSP), in the field of action, accompaniment, research, and academic training, accounts for the diversity of integrative views of the complex psychosocial and community networks of the region, as well as the collective efforts to strengthen and consolidate the discipline. Thus, the chapters present a broad range of views to do, have, and be in the CSP of the 21st century. In fact, it can be seen as a discipline in movement, which has changed the focus point and study of the social agents with whom it works. Although, in the beginning, the CSP focused on studying the community, defined by Maritza Montero (2004) as a group of people in constant transformation and development, who have a relationship of belonging to each other, with social identity and community awareness. Nowadays, the study and definition of the term community are questioned by the epistemologies of the South–as Boaventura de Sousa Santos states–by weighing the communitarian’s establishment of bonds in the communing element as a substance of the ontic being, in the sense of “we”, and in the feeling and thinking the territory.En nuestra América, la Psicología Social Comunitaria (PSC) en el campo de la acción, el acompañamiento, la investigación y la formación académica, da cuenta de la diversidad de miradas integradoras de la complejidad de los entramados psicosociales y comunitarios en la región, como también, de los esfuerzos colectivos por fortalecer y consolidar la disciplina. En este sentido, a través de los capítulos se presenta un amplio espectro de perspectivas para hacer, tener y ser en la PSC del siglo XXI. En efecto, se puede observar una disciplina en movimiento, la cual ha cambiado el foco de atención y estudio de las/los agentes sociales con los que trabaja. Si bien, en un inicio la PSC delimita el interés en estudiar a la comunidad definida por Maritza Montero (2004) como un conjunto de personas en constante transformación y desarrollo, que tienen una relación de pertenencia entre sí, con identidad social y consciencia de comunidad. En la actualidad, el estudio y la definición del concepto comunidad se problematiza desde las epistemologías del sur- en términos de Boaventura de Sousa Santos- al ponderar la trama vincular de lo comunitario en el elemento que comuna como sustancia del ser óntico, en el sentido del nosotros y en el sentipensar el territorioEm nossa América, a Psicologia Social Comunitária (PSC) no campo de ação, acompanhamento, pesquisa e formação acadêmica, mostra a diversidade de visões integradas da complexidade das redes psicossociais e comunitárias na região, bem como os esforços coletivos para fortalecer e consolidar a disciplina. Neste sentido, os capítulos apresentam um amplo espectro de perspectivas para fazer, ter e estar no PSC do século XXI. Com efeito, podemos observar uma disciplina em movimento, que mudou o foco de atenção e estudo dos agentes sociais com os quais ela trabalha. Inicialmente, o PSC estava inicialmente interessado em estudar a comunidade, definida por Maritza Montero (2004) como um grupo de pessoas em constante transformação e desenvolvimento, que têm uma relação de pertencer uns aos outros, com uma identidade social e consciência comunitária, e um sentimento de pertencer à comunidade. Atualmente, o estudo e a definição do conceito de comunidade é problematizado a partir das epistemologias do Sul - em termos de Boaventura de Sousa Santos - ao ponderar a trama de ligação da trama comunitária no elemento comunitário como substância do ser ôntico, no sentido do nós e no sentimento do território

A Coffee Berry Borer (Coleoptera: Curculionidae: Scolytinae) Bibliography

Native to Africa, the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae: Scolytinae), has gradually invaded most coffee-growing areas worldwide. Adult females colonize the coffee berry and oviposit within galleries in the coffee seeds. Larvae and adults consume the seeds, resulting in drastic reductions in yields and quality, negatively affecting the income of approximately 20 million coffee-growing families (~100 million people) in ~80 countries, with losses surpassing more than $500 million annually (Vega et al. 2015). It has become evident that the coffee berry borer scientific community could greatly benefit from having access to a bibliography of the literature related to the insect. Such an information source would allow scientists to find out what research areas have been explored throughout the many coffee berry borer-infested countries after more than 100 years of research on the topic. It could also help to direct lead future research efforts into novel areas, and away from topics and ideas that have been thoroughly investigated in the past