Magnetic field dependence of charge stripe order in La2-xBaxCuO4 (x~1/8)

We have carried out a detailed investigation of the magnetic field dependence of charge ordering in La2-xBaxCuO4 (x~1/8) utilizing high-resolution x-ray scattering. We find that the charge order correlation length increases as the magnetic field greater than ~5T is applied in the superconducting phase (T=2K). The observed unusual field dependence of the charge order correlation length suggests that the static charge stripe order competes with the superconducting ground state in this sample.Comment: 4 pages, 4 figure

Magnetic properties of the overdoped superconductor La2−x_{2-x}Srx_{x}CuO4_{4} with and without Zn impurities

The magnetic properties of the Zn-substituted overdoped high-$T_c$ superconductor La$_{2-x}$Sr$_{x}$Cu$_{1-y}$Zn$_{y}$O$_{4}$ have been studied by magnetization measurements and neutron scattering. Magnetization measurements reveal that for Zn-free samples with $x \geq 0.22$ a Curie term is induced in the temperature dependence of the magnetic susceptibility implying the existence of local paramagnetic moments. The induced Curie constant corresponds to a moment of 0.5 $\mu_B$ per additional Sr$^{2+}$ ion that exceeds $x=0.22$. Zn-substitution in the overdoped \lsco also induces a Curie term that corresponds to 1.2 $\mu_B$ per Zn$^{2+}$ ion, simultaneously suppressing $T_c$. The relationship between $T_c$ and the magnitude of the Curie term for Zn-free \lsco with $x \geq 0.22$ and for Zn-substituted \lsco with $x = 0.22$ are closely similar. This signifies a general competitive relationship between the superconductivity and the induced paramagnetic moment. Neutron scattering measurements show that Zn-substitution in overdoped \lsco anomalously enhances the inelastic magnetic scattering spectra around the $(\pi, \pi)$ position, peaking at $\omega \sim 7$ meV. These facts are discussed on the basis of a "swiss-cheese" model of Zn-substituted systems as well as a microscopic phase separation scenario in the overdoped region indicated by muon-spin-relaxation measurements.Comment: 10 pages, 8 figure

Selective and Genetic Constraints on Pneumococcal Serotype Switching

Streptococcus pneumoniae isolates typically express one of over 90 immunologically distinguishable polysaccharide capsules (serotypes), which can be classified into “serogroups” based on cross-reactivity with certain antibodies. Pneumococci can alter their serotype through recombinations affecting the capsule polysaccharide synthesis (cps) locus. Twenty such “serotype switching” events were fully characterised using a collection of 616 whole genome sequences from systematic surveys of pneumococcal carriage. Eleven of these were within-serogroup switches, representing a highly significant (p < 0.0001) enrichment based on the observed serotype distribution. Whereas the recombinations resulting in between-serogroup switches all spanned the entire cps locus, some of those that caused within-serogroup switches did not. However, higher rates of within-serogroup switching could not be fully explained by either more frequent, shorter recombinations, nor by genetic linkage to genes involved in β–lactam resistance. This suggested the observed pattern was a consequence of selection for preserving serogroup. Phenotyping of strains constructed to express different serotypes in common genetic backgrounds was used to test whether genotypes were physiologically adapted to particular serogroups. These data were consistent with epistatic interactions between the cps locus and the rest of the genome that were specific to serotype, but not serogroup, meaning they were unlikely to account for the observed distribution of capsule types. Exclusion of these genetic and physiological hypotheses suggested future work should focus on alternative mechanisms, such as host immunity spanning multiple serotypes within the same serogroup, which might explain the observed pattern

Public duties and private interests: the Special Joint Committee on Conflict of Interest. by Barbara Laine Kagedan

tag=1 data=Public duties and private interests: the Special Joint Committee on Conflict of Interest. by Barbara Laine Kagedan tag=2 data=Kagedan, Barbara Laine tag=3 data=Canadian Parliamentary Review, tag=4 data=15 tag=5 data=4 tag=6 data=Winter 1992/93 tag=7 data=17-28. tag=8 data=MPS-CANADA%ETHICAL CONDUCT tag=10 data=Reconciling the public duties and private interests of Members of Parliament is a task which has proven in the past to be as difficult as it is important. A new system has been recommended to be instituted to address conflicts of interest. tag=11 data=1994/6/1 tag=12 data=94/0031 tag=13 data=CABReconciling the public duties and private interests of Members of Parliament is a task which has proven in the past to be as difficult as it is important. A new system has been recommended to be instituted to address conflicts of interest

Survival, Treatment Patterns, and Identifying Predictors of Receipt of Adjuvant Therapy and Survival for Curative-intent Pancreatic Adenocarcinoma: A Population-based Analysis

Introduction: Pancreatic adenocarcinoma (PC) is a leading cause of cancer-related mortality in North America. Methods: This study was conducted as a retrospective observational cohort trial of patients undergoing resection of PC in the province of Ontario, Canada between 2005-2010. The study involved linkage of administrative datasets, and abstraction of resection specimen pathology reports. Overall survival (OS) and receipt of adjuvant treatment were the primary outcomes in this study. Adjuvant treatment was classified as chemotherapy (CT) or chemoradiation therapy (CRT). Results: While adjuvant CT or CRT were not associated with improved OS, those with node-negative disease benefited from adjuvant CT. Histopathologic factors were the strongest prognostic factors. Substantial variation in the likelihood of receiving adjuvant treatment between different institutions treating PC was identified. Residential instability, material deprivation, rurality, and median income were associated with receipt of surgery among PC patients. Conclusions: Outcomes following resection are primarily determined by tumour biology.M.Sc.2018-06-21 00:00:0

Public duties and private interests: the Special Joint Committee on Conflict of Interest. by Barbara Laine Kagedan

tag=1 data=Public duties and private interests: the Special Joint Committee on Conflict of Interest. by Barbara Laine Kagedan tag=2 data=Kagedan, Barbara Laine tag=3 data=Canadian Parliamentary Review, tag=4 data=15 tag=5 data=4 tag=6 data=Winter 1992/93 tag=7 data=17-28. tag=8 data=ETHICAL CONDUCT%MPS-CANADA tag=10 data=Reconciling the public duties and private interest of MPs is a task which has proven in the past to be as difficult as it is important. Canada. Joint Committee of the House of Commons and the Senate recently studied the issue... Provided by MICAH, Canberra. tag=11 data=1993/5/5 tag=12 data=93/0243 tag=13 data=CABReconciling the public duties and private interest of MPs is a task which has proven in the past to be as difficult as it is important. Canada. Joint Committee of the House of Commons and the Senate recently studied the issue... Provided by MICAH, Canberra

Nationalism as a constructive force

Abstract not available