Search for long-lived neutral particles in pp collisions at s√=13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter

This paper describes a search for pairs of neutral, long-lived particles decaying in the ATLAS calorimeter. Long-lived particles occur in many extensions to the Standard Model and may elude searches for new promptly decaying particles. The analysis considers neutral, long-lived scalars with masses between 5 and 400 GeV, produced from decays of heavy bosons with masses between 125 and 1000 GeV, where the long-lived scalars decay into Standard Model fermions. The analysis uses either 10.8 fb−1 or 33.0 fb−1 of data (depending on the trigger) recorded in 2016 at the LHC with the ATLAS detector in proton–proton collisions at a centre-of-mass energy of 13 TeV. No significant excess is observed, and limits are reported on the production cross section times branching ratio as a function of the proper decay length of the long-lived particles

Thomsen-Friedenreich antigen presents as a prognostic factor in colorectal carcinoma: A clinicopathologic study of 264 patients

BACKGROUND. Up to now, the expression of the tumor-associated Thomsen- Friedenreich (TF) antigen in colorectal carcinoma has not been thoroughly investigated with particular emphasis on its correlation with established clinicopathologic characteristics and classifications as well as its prognostic relevance. METHODS. Formalin fixed, paraffin embedded specimens from 264 patients with colorectal carcinoma were stained using an avidin- biotin complex-peroxidase assay. As primary monoclonal antibodies (MAbs), A78-G/A7, which binds to TFα and TFβ antigen irrespective of its carrier, and BW835, which detects TFα on MUC1 repeat peptide, were applied. RESULTS. MAbs A78-G/A7 and BW835 labeled 64.8% and 58.0%, respectively, of carcinomas. None of the binding patterns correlated with gender, tumor localization, or growth type. Only BW835 reactivity exhibited a significant correlation with increasing pTNM staging and histologic grading. Staining of the MAb A78-G/A7 was significantly stronger in carcinomas that contained a mucinous component. In univariate survival analysis, in addition to pTNM staging and histologic grading, reactivity with A78-G/A7 as well as BW835 were significantly correlated with lower survival probability. Multivariate analysis according to the Cox proportional hazards model revealed only pTNM staging, histologic grading, and A78-G/A7 staining to be independent prognostic factors. CONCLUSIONS. According to these results, TF disaccharide represents a cancer- associated antigen in colorectal carcinoma that exhibits qualities of a prognostic marker. As demonstrated by BW835 staining, it is obviously coexpressed with MUC1 peptide core in a great number of cases. These results suggest that TF, in addition to MUC1, might also serve as a useful target antigen in the treatment of patients with colorectal carcinoma

Towards a global list of accepted species II. Consequences of inadequate taxonomic list governance

Species lists are widely used in legislation and regulation to manage and conserve biodiversity. In this paper, we explore the issues caused by the lack of an adequately governed and universally accepted list of the world’s species. These include lack of quality control, duplicated effort, conflicts of interest, lack of currency, and confusion in the scientific use of taxonomic information. If species lists are to fulfill their role efficiently, then the governance systems underlying their creation must keep pace. Fortunately, modernization of species list governance is now possible as a result of advances in biodiversity informatics and two decades of experience working to create the backbone of a global species list

Towards a global list of accepted species III. Independence and stakeholder inclusion

A global consensus list of the world’s species must be based on the best available taxonomic research, and its contents should not be biased towards certain political or social aims. At the same time, users of any global list must be involved or consulted in its establishment to ensure that the list meets their needs. This paper argues that while these two desiderata— independence and inclusion—might seem to be in conflict, they are in fact compatible. More precisely, it suggests the roles taxonomists and users could play in establishing and maintaining a global consensus list to make sure that this list is both inclusive and independent

Principles for creating a single authoritative list of the world's species

Copyright: © 2020 Garnett et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Lists of species underpin many fields of human endeavour, but there are currently no universally accepted principles for deciding which biological species should be accepted when there are alternative taxonomic treatments (and, by extension, which scientific names should be applied to those species). As improvements in information technology make it easier to communicate, access, and aggregate biodiversity information, there is a need for a framework that helps taxonomists and the users of taxonomy decide which taxa and names should be used by society whilst continuing to encourage taxonomic research that leads to new species discoveries, new knowledge of species relationships, and the refinement of existing species concepts. Here, we present 10 principles that can underpin such a governance framework, namely (i) the species list must be based on science and free from nontaxonomic considerations and interference, (ii) governance of the species list must aim for community support and use, (iii) all decisions about list composition must be transparent, (iv) the governance of validated lists of species is separate from the governance of the names of taxa, (v) governance of lists of accepted species must not constrain academic freedom, (vi) the set of criteria considered sufficient to recognise species boundaries may appropriately vary between different taxonomic groups but should be consistent when possible, (vii) a global list must balance conflicting needs for currency and stability by having archived versions, (viii) contributors need appropriate recognition, (ix) list content should be traceable, and (x) a global listing process needs both to encompass global diversity and to accommodate local knowledge of that diversity. We conclude by outlining issues that must be resolved if such a system of taxonomic list governance and a unified list of accepted scientific names generated are to be universally adopted

Pesquisa de antigenos aglutinantes "major" 1, 2 e 3 em cepas de Bordetella pertussis, isoladas de crianças com coqueluche atendidas no Hospital de Isolamento Emílio Ribas de São Paulo, Brasil Determination of 1, 2 and 3 major antigens in Bordetella pertussis strains isolated from Brazilian children with whooping-cough

Em 30 cepas de Bordetella pertussis isoladas de crianças com coqueluche, atendidas no Hospital de Isolamento Emílio Ribas de São Paulo, foram pesquisados os antígenos aglutinantes ''major" 1, 2 e 3. Levando-se em conta a presença combinada dos três antígenos, as provas de soro-aglutinação rápida em lamina revelaram que 25 (83,3%) cepas possuiam os fatores 1, 2 e 3, enquanto que 3 (10,0%) e 2 (6,7%) foram positivas, somente, para 1, 2 e 1, 3, respectivamente. Os resultados foram discutidos, considerando-se a importância deste antígeno no preparo de vacinas.<br>The presence of major antigens, 1, 2 and 3 were determined in 30 strains of B. pertussis isolated from children with whooping-cough hospitalized at the Hospital Emílio Ribas, São Paulo Brazil. The method used was the slide-agglutination test. Tests showed that 25(83.3%) of strains were positives for factors 1, 2 and 3. Factores 1 and 3 alone were present in 3 (10%) of strains and 1 and 2 alone in 2 (6.7%)