A new combination and change in rank in Polycarpon (Caryophyllaceae), endemic to California, U.S.A., and Mexico

The name Polycarpon depressum Nutt. (Caryophyllaceae) is here investigated and lectotypified. According to a recent molecular investigation and based on the morphology and ecology of the taxon, the new combination and change in rank for P. tetraphyllum (L.) L. subsp. depressum (Nutt.) Iamonico are proposed for these plants endemic to California, U.S.A., and northern Mexico. A description of the subspecies is provided as is a comparison with the similar taxa P. tetraphyllum subsp. tetraphyllum, P. tetraphyllum subsp. alsinifolium (Biv.) Ball, and P. tetraphyllum subsp. diphyllum (Cav.) O. Bolòs & Font Quer

Firsthand Opiates Abuse on Social Media: Monitoring Geospatial Patterns of Interest Through a Digital Cohort

In the last decade drug overdose deaths reached staggering proportions in the US. Besides the raw yearly deaths count that is worrisome per se, an alarming picture comes from the steep acceleration of such rate that increased by 21% from 2015 to 2016. While traditional public health surveillance suffers from its own biases and limitations, digital epidemiology offers a new lens to extract signals from Web and Social Media that might be complementary to official statistics. In this paper we present a computational approach to identify a digital cohort that might provide an updated and complementary view on the opioid crisis. We introduce an information retrieval algorithm suitable to identify relevant subspaces of discussion on social media, for mining data from users showing explicit interest in discussions about opioid consumption in Reddit. Moreover, despite the pseudonymous nature of the user base, almost 1.5 million users were geolocated at the US state level, resembling the census population distribution with a good agreement. A measure of prevalence of interest in opiate consumption has been estimated at the state level, producing a novel indicator with information that is not entirely encoded in the standard surveillance. Finally, we further provide a domain specific vocabulary containing informal lexicon and street nomenclature extracted by user-generated content that can be used by researchers and practitioners to implement novel digital public health surveillance methodologies for supporting policy makers in fighting the opioid epidemic.Comment: Proceedings of the 2019 World Wide Web Conference (WWW '19

(2360) Proposal to reject the name Chenopodium caudatum (Amaranthaceae / Chenopodiaceae)

nomenclature Chenopodium caudatu

Emancipación a través de la Economia Solidaria

La construcción de una cadena productiva solidaria binacional del PET compuesta por Cooperativas de Reciclaje, Empresas Recuperadas por los Trabajadores (ERT´s) del setor de textil y, a medio plazo, incluyendo cooperativas de producción para el consumidor final, representa una posibilidad de transformación da condición socio-económica de los colectivos de trabajadores. Se trata de la primeira cadena productiva solidaria que envuelve dos países- Brazil y Uruguay, dos estados brazileros- Rio Grande do Sul y Minas Gerais-, abarcando varias ciudades, más de 30 cooperativas, millares de trabajadores y instituciones de enseñanza, ONG´s y el poder público, en las diferentes esferas de gobierno. Para este proyecto que busca avanzar en la emancipación de los trabajadores tiene sido fundamental el aporte de la educación. Este artículo será estructurado en sete partes, abarcando: 1) La presentacion de la investigación, detallando sus justificativas, los objetivos y los procedimientos metodológicos, 2) La Cadena Produtiva Binacional Solidaria del PET, envolviendo el contexto, el proceso del PET, los participantes y los desafios enfrentados, 3) La dimensión educación y su función mediadora, 4) Las demás dimensiones del proyecto y su influencia en las emancipación social, 5) Los resultados alcanzados hasta el momento , 6) conclusiones preliminares y 7) Referencias bibliográficas.Mesa 23: Asociativismo, economía social y tercer sector: las tensiones de una agenda en construcción.Facultad de Humanidades y Ciencias de la Educació

Taxonomic revision of the genus Alternanthera (Amaranthaceae) in Italy

A taxonomic revision of the genus Alternanthera (Amaranthaceae) in Italy is here presented. Field surveys were carried out during the period 2007–2013. Thirty-six herbaria (both European and American) were consulted as well as extensive literature was analyzed. Four taxa are recognized, all of them to be considered aliens native to South America. Information about nomenclature (accepted names, main synonyms, and types), morphology, chromosome number, alien status (at national and regional levels), occurrence in Italy (at regional and provincial scale), ecology (preferential habitat, phenology, and elevation), taxonomical notes, and Italian vernacular names were provided for each taxon. A diagnostic key was given. For the nomenclatural purposes the generic name Alternanthera and its type was discussed, and the names A. paronychioides and A. pungens were studied and typified (lecto- and neotype, respectively) on specimens preserved at PH and P

Impact of Future Remnant Liver Volume on Post-Hepatectomy Regeneration in Non-Cirrhotic Livers

Objective: The purpose of the study is to detect if some parameters can be considered as predictors of liver regeneration in two different patient populations composed of in living donors for adult to adult living donor liver transplant and patients with hepatic malignancies within a single institution.Summary Background Data: Preoperative multi-detector computed tomography volumetry is an essential tool to assess the volume of the remnant liver. Methods: a retrospective analysis from an ongoing clinical study on 100 liver resections, between 2004 and 2010. 70 patients were right lobe living donors for liver transplantation and 30 patients were resected for treatment of tumors. Pre-surgical factors such as age, weight, height, body mass index (BMI), original liver volume, future remnant liver volume (FRLV), spleen volume, liver function tests, creatinine, platelet count, steatosis, portal vein embolization (PVE) and number of resected segments were analyzed to evidence potential markers for liver regeneration. Results: Follow-up period did not influence the amount of liver regenerated: the linear regression evidenced that there is no correlation between percentage of liver regeneration and time of follow-up (p=0.88). The pre-surgical variables that resulted markers of liver regeneration include higher preoperative values of BMI (p=0.01), bilirubin(p=0.04), glucose (p=0.05) and GGT (p=0.014); the most important association was revealed regarding the lower FRLV (pConclusions: Liver regeneration follows similar pathway in living donor and in patients resected for cancer. Small FRLV tends to regenerate more and faster, confirming that a larger resections may lead to a greater promotion of liver regeneration in patients with optimal conditions in terms of body habitus, preoperative liver function tests and glucose level

Lectotypification of Linnaean names in Tussilago (Asteraceae)

The typification of the names Tussilago alpina and T. petasites (Asteraceae) are discussed. Specimens from the Burser Herbarium (UPS) are designated as lectotypes

Rosamond McKitterick, (Ed.), La alta Edad Media, trad. Lourdes Soriano Robles, Crítica, Barcelona, 2002, ISBN: 84-8432-385-4, 333 p.

Fil: Calcagno, Duilio

Generalized Quantifiers: Logic and Language

The Generalized Quantifiers Theory, I will argue, in the second half of last Century has led to an important rapprochement, relevant both in logic and in linguistics, between logical quantification theories and the semantic analysis of quantification in natural languages. In this paper I concisely illustrate the formal aspects and the theoretical implications of this rapprochement

DNA Sequence Determinants Controlling Affinity, Stability and Shape of DNA Complexes Bound by the Nucleoid Protein Fis.

The abundant Fis nucleoid protein selectively binds poorly related DNA sequences with high affinities to regulate diverse DNA reactions. Fis binds DNA primarily through DNA backbone contacts and selects target sites by reading conformational properties of DNA sequences, most prominently intrinsic minor groove widths. High-affinity binding requires Fis-stabilized DNA conformational changes that vary depending on DNA sequence. In order to better understand the molecular basis for high affinity site recognition, we analyzed the effects of DNA sequence within and flanking the core Fis binding site on binding affinity and DNA structure. X-ray crystal structures of Fis-DNA complexes containing variable sequences in the noncontacted center of the binding site or variations within the major groove interfaces show that the DNA can adapt to the Fis dimer surface asymmetrically. We show that the presence and position of pyrimidine-purine base steps within the major groove interfaces affect both local DNA bending and minor groove compression to modulate affinities and lifetimes of Fis-DNA complexes. Sequences flanking the core binding site also modulate complex affinities, lifetimes, and the degree of local and global Fis-induced DNA bending. In particular, a G immediately upstream of the 15 bp core sequence inhibits binding and bending, and A-tracts within the flanking base pairs increase both complex lifetimes and global DNA curvatures. Taken together, our observations support a revised DNA motif specifying high-affinity Fis binding and highlight the range of conformations that Fis-bound DNA can adopt. The affinities and DNA conformations of individual Fis-DNA complexes are likely to be tailored to their context-specific biological functions