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Characterizing hole trap production due to proton irradiation in germanium cross-strip detectors.
Exp Astron (Dordr)
January 2025
Space Sciences Laboratory, University of California, Berkeley, 7 Gauss Way, Berkeley, 94720 CA USA.
We present an investigation into the effects of high-energy proton damage on charge trapping in germanium cross-strip detectors with the goal of accomplishing three important measurements. First, we calibrated and characterized the spectral resolution of a spare COSI-balloon detector in order to determine the effects of intrinsic trapping, finding that electron trapping due to impurities dominates over hole trapping in the undamaged detector. Second, we performed two rounds of proton irradiation of the detector in order to quantify, for the first time, the rate at which charge traps are produced by proton irradiation.
View Article and Find Full Text PDFSelection of Early Life Codons by Ultraviolet Light.
ACS Cent Sci
January 2025
Systems Biophysics, Ludwig-Maximilians-University Munich, Amalienstr. 54, 80799 Munich, Germany.
How life developed in its earliest stages is a central but notoriously difficult question in science. The earliest lifeforms likely used a reduced set of codon sequences that were progressively completed over time, driven by chemical, physical, and combinatorial constraints. However, despite its importance for prebiotic chemistry, UV radiation has not been considered a selection pressure for the evolution of early codon sequences.
View Article and Find Full Text PDFCompound exposure of 2.8 GHz and 9.3 GHz microwave causes learning and memory impairment in rats.
Heliyon
January 2025
Anhui Medical University School of Basic Medicine, Hefei, 230032, China.
The anxieties and concerns about health hazards caused by microwave has been growing recently. Previous studies have reported microwave induced structural and functional injuries to brain. However, the biological effects caused by compound microwave were largely unexplored.
View Article and Find Full Text PDFEvaluation of natural polysaccharides from edible mushrooms for the treatment of male testicular injury caused by X-ray.
J Food Sci
January 2025
Engineering Research Center of Edible and Medicinal Fungi of Ministry of Education, Jilin Agricultural University, Changchun, Jilin, China.
Radiation exposure can lead to reproductive damage (RD), for which there is currently no effective treatment. Natural compounds, particularly fungal polysaccharides, have shown promising therapeutic potential for RD. Due to limited availability of effective polysaccharides, research has turned to alternative sources from edible mushrooms.
View Article and Find Full Text PDFEvaluating H2BC9 as a potential diagnostic and prognostic biomarker in head and neck squamous cell carcinoma.
Eur J Med Res
January 2025
Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, China.
Background: Histone H2B is highly expressed in many types of cancers and is involved in cancer development. H2B clustered histone 9 (H2BC9), a member of the H2B family, plays critical roles in gene expression regulation, chromosome structure, DNA repair stability, and cell cycle regulation. However, the diagnostic and prognostic value of H2BC9 in head and neck squamous cell carcinoma (HNSCC) remains unclear.
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