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Phase Coexistence Induced Giant Dielectric Tunability and Electromechanical Response in PbZrO Epitaxial Thin Films.
Small
January 2025
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
PbZrO (PZO) thin films, as a classic antiferroelectric material, have attracted tremendous attention for their excellent dielectric, electromechanical, and thermal switching performances. However, several fundamental questions remain unresolved, particularly the existence of an intermediate phase during the transition from the antiferroelectric (AFE) to ferroelectric (FE) state. Here, a phase coexistence configuration of an orthorhombic AFE phase and a tetragonal-like (T-like) phase is reported in epitaxial antiferroelectric PZO thin films, with thickness ranging from 16 to 110 nm.
View Article and Find Full Text PDFThe Unusual Mesophases and Properties Exhibited by a Family of Glycosteroids.
Chemistry
January 2025
Universite Claude Bernard Lyon 1, ICBMS, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622, Villeurbanne, FRANCE.
In this article we describe research on the synthesis and characterization of a family of "Janus" amphiphiles composed of disaccharide head groups and alkaloid units joined together via a methylene linker, and bearing a lateral aliphatic chain of varying length. The condensed phases formed by self-organization of the products as a function of temperature were characterized by differential scanning calorimetry, thermal polarized light microscopy, and small angle X-ray scattering, allied with computational modelling and simulations. Structural studies on heating specimens from the solid showed that some homologues exhibited lamellar, columnar and bicontinuous mesophases, whereas the same homologues revealed different phase sequences on cooling from the amorphous liquid.
View Article and Find Full Text PDFParanoia and unusual sensory experiences in Parkinson's disease.
Aging Ment Health
January 2025
Department of Experimental Psychology, University of Oxford, Oxford, UK.
Objectives: There has been limited exploration into the nature and development of psychotic experiences (PEs) in Parkinson's disease (PD). We aimed to comprehensively assess the frequency, severity, and associated distress of paranoia and unusual sensory experiences (USEs) in PD, and to assess what variables are significantly associated with these experiences, focussing on psychological processes central to understanding PEs in non-PD groups.
Method: A questionnaire battery was completed by 369 individuals with PD with a mean age of 66 years and mean time since diagnosis of 5 years.
Inflammatory pseudotumor-like extranodal classic Hodgkin lymphoma manifesting as bowel perforation in acquired immunodeficiency syndrome patient with disseminated leishmaniasis: a case report and approach to differential diagnosis.
J Gastrointest Oncol
December 2024
Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Background: Classic Hodgkin lymphoma (CHL) is an extremely common non-acquired immunodeficiency syndrome (AIDS) defining malignancy and its incidence is rising. CHL is usually present in the lymph node and extranodal involvement is rare. Primary CHL of the gastrointestinal (GI) tract is exceedingly rare.
View Article and Find Full Text PDFUnusual presentation of brisk active small bowel bleeding from jejunal GIST.
BMJ Case Rep
January 2025
Pulmonary and Pulmonary Critical Care Medicine, Chaophya Abhaibhubejhr Hospital, Mueang Prachin Buri, Prachin Buri, Thailand
This case emphasises the difficulties in diagnosing a patient with brisk active small bowel bleeding and the differential diagnostic process of identifying tumour types preoperatively using imaging information. This case also underscores the importance of the surgical approach in different scenarios. Despite advancements in small bowel imaging, identifying the source and causes of small bowel bleeding remains challenging, particularly in life-threatening situations.
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