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Comparative Analysis of the Clinical Manifestations of Sinonasal Natural Killer T-Cell Lymphoma and Diffuse Large B-Cell Lymphoma.
J Rhinol
July 2024
Department of Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Background And Objectives: Natural killer T-cell lymphoma (NKTCL) and diffuse large B-cell lymphoma (DLBCL) are the two most prevalent subtypes of lymphoma in the sinonasal region. Accurately differentiating between sinonasal DLBCL and NKTCL is crucial for determining the appropriate treatment and prognosis. The present study compared the clinical characteristics of these two conditions.
View Article and Find Full Text PDFBiocrusts Mediate the Niche Distribution and Diversity of Ammonia-Oxidizing Microorganisms in the Gurbantunggut Desert, Northwestern China.
Microb Ecol
November 2024
National Key Laboratory of Ecological Security and Sustainable Development in Arid Regions, State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, Xinjiang, China.
Article Synopsis
- Biological soil crusts (biocrusts) are crucial for nitrogen cycling in desert ecosystems, yet their disturbance's effects on ammonia-oxidizing microorganisms are poorly understood.
- * A 4-year study on the Gurbantunggut Desert showed that removing biocrusts significantly changed the abundance and distribution of ammonia-oxidizing archaea (AOA) and bacteria, especially during different seasons.
- * The research revealed AOA were more abundant than bacteria in deeper soils during summer, and their communities became more varied after biocrust removal, highlighting the important role biocrusts play in maintaining nitrogen transformation processes in these ecosystems.
Extensive iron-water exchange at Earth's core-mantle boundary can explain seismic anomalies.
Nat Commun
October 2024
Department of Earth and Space Science, Osaka University, Toyonaka, 560-0043, Japan.
Seismological observations indicate the presence of chemical heterogeneities at the lowermost mantle, just above the core-mantle boundary (CMB), sparking debate over their origins. A plausible explanation for the enigmatic seismic wave velocities observed in ultra-low-velocity zones (ULVZs) is the process of iron enrichment from the core to the silicate mantle. However, traditional models based on diffusion of atoms and penetration of molten iron fail to account for the significant iron enrichment observed in ULVZs.
View Article and Find Full Text PDFUniversal Diffusion in Coulomb Crystals.
Phys Rev Lett
September 2024
Department of Physics, Illinois State University, Normal, Illinois 61761, USA.
Diffusion coefficients for crystallized Coulomb plasmas are essential microphysics input for modeling white dwarf cores and neutron star crusts but are poorly understood. In this work we present a model for diffusion in Coulomb crystals. We show that melting and diffusion follow the same universal scaling such that diffusion is independent of screening.
View Article and Find Full Text PDFA clinical case of pityriasis lichenoides chronica presenting with palpable purpura after streptococcal infection.
Folia Med (Plovdiv)
June 2024
Sofiamed University Hospital, St Kliment Ohridski University, Sofia, Bulgaria.
Article Synopsis
- Pityriasis lichenoides is a rare inflammatory skin condition characterized by red-brown papules and crusty lesions as they evolve over time.
- A 60-year-old woman developed the chronic form of this condition ten days after suffering from streptococcal pharyngitis, starting with purple spots on her legs and later developing red, scaly patches on other parts of her body.
- After treatment with methylprednisolone and hydroxychloroquine, her skin lesions improved significantly and did not return.
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