Publications by authors named "L M Malard"
Article Synopsis
- Prevention of ABO-incompatible red cell transfusions (ABO-it) relies on precise identification of donors and patients, with different practices in France, Germany, and the UK.
- A study analyzed ABO-it incidents from 2013 to 2022 and found similar average frequencies of ABO-it in France (0.19) and the UK (0.28), but a higher rate in Germany (0.71), despite similar safety measures.
- The main causes of ABO-it were errors in patient identification and administering the wrong red cell unit, highlighting the need for improved identification systems and processes to enhance transfusion safety.
2D dilute magnetic semiconductors (DMS) based on transition metal dichalcogenides (TMD) offer an innovative pathway for advancing spintronic technologies, including the potential to exploit phenomena such as the valley Zeeman effect. However, the impact of magnetic ordering on the valley degeneracy breaking and on the enhancement of the optical transitions g-factors of these materials remains an open question. Here, a giant effective g-factors ranging between ≈-27 and -69 for the bound exciton at 4 K in vanadium-doped WSe monolayers, obtained through magneto-photoluminescence (PL) experiments is reported.
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- Syphilis cases among blood donors in France have been rising, with a significant uptick observed in 2022 compared to earlier years.
- Data from over 45 million donations (2007-2022) revealed that the infection rate was notably higher in males, particularly among men who have sex with men (MSM), whose risk factor percentage increased over time.
- A non-treponemic test (NTT) was used to assess infection recency, but the data were insufficient to reliably differentiate between recent and past infections among the syphilis-positive donors.
The role of defects in two-dimensional semiconductors and how they affect the intrinsic properties of these materials have been a widely researched topic over the past few decades. Optical characterization techniques such as photoluminescence and Raman spectroscopies are important tools to probe the physical properties of semiconductors and the impact of defects. However, confocal optical techniques present a spatial resolution limitation lying in a μm-scale, which can be overcome by the use of near-field optical measurements.
View Article and Find Full Text PDFIn France, blood donations are tested in pools of 96 samples for parvovirus B19 (B19V) DNA to discard plasma for fractionation when it contains high viral loads. Between January 2015 and March 2024, B19V-positive donations decreased during the COVID-19 pandemic, followed by a strong rebound in 2023 and unusually high circulation during winter 2023/24 (ca 10 times higher December 2023-March 2024 vs the pre-pandemic period). Variations over time are probably related to measures implemented to limit SARS-CoV-2 spread.
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