19 research outputs found

    A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

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    We report absolute differential cross sections (DCSs) for elastic electron scattering from OCS (carbonyl sulphide) and CS₂ (carbon disulphide) in the impact energy range of 1.2-200 eV and for scattering angles from 10° to 150°. Above 10 eV, the angular distributions are found to agree quite well with our present calculations using two semi-phenomenological theoretical approaches. One employs the independent-atom model with the screening-corrected additivity rule (IAM-SCAR), while the other uses the continuum-multiple-scattering method in conjunction with a parameter-free exchange-polarization approximation. Since OCS is a polar molecule, further dipole-induced rotational excitation cross sections have been calculated in the framework of the first Born approximation and incoherently added to the IAM-SCAR results. In comparison with the calculated DCS for the S atom, atomic-like behavior for the angular distributions in both the OCS and CS₂ scattering systems is observed. Integrated elastic cross sections are obtained by extrapolating the experimental measurements, with the aid of the theoretical calculations, for those scattering angles below 10° and above 150°. These values are then compared with the available total cross sections.The present work has been supported by the Japanese Ministry of Education, Sport, Culture and Technology and the Australian Research Council through its Centers of Excellence program. PL-V acknowledges his Visiting Professor position at Sophia University, Tokyo, Japan and also the Portuguese PEst-OE/FIS/UI0068/2011 grant. This work forms part of the EU/ESF COST Action CM0805 programme “The Chemical Cosmos.” M.J.B. and S.J.B. acknowledge the JSPS for provision of a Senior Fellowship, and the University of Malaya for their hospitality as Visiting Professor F. Blanco and Professor G. García acknowledge partial financial support of the Spanish Ministerio de Economia y Competitividad through Project No. FIS2009-10245 as well as the EU/ESF COST Action MP1002

    A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

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    We report absolute differential cross sections (DCSs) for elastic electron scattering from OCS (carbonyl sulphide) and CS2 (carbon disulphide) in the impact energy range of 1.2–200 eV and for scattering angles from 10◩ to 150◩. Above 10 eV, the angular distributions are found to agree quite well with our present calculations using two semi-phenomenological theoretical approaches. One employs the independent-atom model with the screening-corrected additivity rule (IAM-SCAR), while the other uses the continuum-multiple-scattering method in conjunction with a parameter-free exchange-polarization approximation. Since OCS is a polar molecule, further dipole-induced rotational excitation cross sections have been calculated in the framework of the first Born approximation and incoherently added to the IAM-SCAR results. In comparison with the calculated DCS for the S atom, atomic-like behavior for the angular distributions in both the OCS and CS2 scattering systems is observed. Integrated elastic cross sections are obtained by extrapolating the experimental measurements, with the aid of the theoretical calculations, for those scattering angles below 10◩ and above 150◩. These values are then compared with the available total cross sections

    Supplementary Material for: Venous Stasis and Cerebrovascular Complications in Cerebral Venous Sinus Thrombosis

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    <strong><em>Background/Aims:</em></strong> The factors related to cerebrovascular complications in cerebral venous sinus thrombosis (CVST) are controversial. We focused on venous stasis and investigated its relationship with cerebrovascular complications in CVST. <b><i>Methods:</i></b> CVST patients between June 2013 and October 2016 were enrolled. Relationships between cerebrovascular complications, defined as cerebral venous infarction, intracerebral hemorrhage, or subarachnoid hemorrhage, and cerebrum venous stasis and other clinical information were retrospectively analyzed. Venous stasis was evaluated by the prominence of the veins on susceptibility-weighted imaging (SWI). The cerebrum was divided into 10 regions according to the venous drainage territories, and venous stasis was quantified by adding one point for venous prominence on SWI for each region (CVST SWI score). <b><i>Results:</i></b> All 5 cases in the noncomplicated group had a CVST SWI score of 0. The 3 patients with CVST SWI scores higher than 0 had cerebrovascular complications. The CVST SWI scores were higher in the complicated group than in the noncomplicated group (3.0 vs. 0, <i>p</i> = 0.010). Seizures were seen in all patients with complications and in none of the patients without complications (3 vs. 0, <i>p</i> = 0.018). <b><i>Conclusion:</i></b> Venous stasis evaluated by SWI can help predict cerebrovascular complications in CVST. A seizure is an important initial symptom that suggests cerebrovascular complications in CVST

    Supplementary Material for: Urinary Immunoglobulin G Is Associated with Deep and Infratentorial Cerebral Microbleeds in Stroke Patients

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    Background: Cerebral microbleeds (CMBs) detected on susceptibility-weighted imaging (SWI) are associated with cerebral small vessel disease. Chronic kidney disease and microalbuminuria have been associated with the presence of CMBs in stroke patients. Urinary immunoglobulin G (IgG) is measured to document glomerular injury; however, the relationship between urinary IgG and CMBs is unknown. Methods: We retrospectively enrolled consecutive patients who had been admitted with transient ischemic attack (TIA) or ischemic stroke and identified those who had undergone SWI and a spot urine test. The location of CMBs was classified on magnetic resonance imaging as strictly lobar, deep/infratentorial (D/I), or mixed areas. We analyzed the association between urinary IgG and the presence and location of CMBs. Results: We included 298 patients (86 female, median age 70 years, median eGFR 65.8 mL/min/1.73 m2). Positive urinary IgG and CMB results were found in 58 (19%) and 160 patients (54%), respectively. Urinary IgG positivity was significantly associated with CMBs compared with non-CMBs (28% vs. 9%, p p p p Conclusions: Urinary IgG was associated with the prevalence of D/I or mixed location CMBs in TIA or ischemic stroke patients. Our findings provide new insights into the association between urinary IgG and the distribution of CMBs
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