Unprecedented heat in North China: how soil moisture amplified 2023's record heatwave
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Updates every hour. Last Updated: 20-Oct-2025 14:11 ET (20-Oct-2025 18:11 GMT/UTC)
Slow scintillation component due to charge carrier capture at point defects is a serious issue in scintillator materials. Therefore, the fabrication of scintillators with a high proportion of fast component in scintillation response is of great interest to material scientists. By applying the defect engineering strategy in the advanced optical Lu3Al5O12:Ce,Mg (LuAG:Ce,Mg) ceramics, ultrahigh fast scintillation proportion can be achieved with slight loss of the fast scintillation light. This strategy has a broad application potential in improving fast scintillation proportion of various oxide scintillators.
Transition metal diborides (TMB2) are materials of choice for the applications in hypersonic vehicles and scramjet engines due to their unique combination of fascinating properties such as high melting point, high elastic modulus, excellent thermal and chemical stability, etc. Understanding microscopic information such as the electronic structure and chemical bonding of TMB2 is essential for establishing the structure-property relationships. However, for decades, direct observation of atomic arrangements in TMB2 was seldom conducted due to the limited resolution of transmission electron microscope and filling this research gap was imperative. Herein the crystal structure and chemical bonding of CrB2 were approved for the first time using aberration corrected transmission electron microscopy coupled with electron energy loss spectroscopy (EELS) accessory. Combined with first-principles calculations based on density functional theory (DFT), CrB2 is confirmed to have an AlB2-type structure, where Cr bonds to each other in (001) plane by metallic bonding and B is bonding in the form of a graphite-like six-membered ring in (002) plane through sp2 hybridization, while Cr-B ionic-covalent bonding is formed in (110) plane. A detailed analysis of the experimental and calculated results of EELS of CrB2 show that the hybridization between Cr 3d and B has a significant effect on EELS of transition metal borides (TMB2). In addition, hysteresis loop of CrB2 was tested for the first time based on the theoretical calculation and the molar susceptibility of CrB2 was about 5.77×10-4 emu/mol.
Southeast Xizang, situated in southwestern China, is a global biodiversity hotspot harboring exceptionally rich fungal diversity. This study, part of the Second Qinghai-Xizang Plateau Scientific Expedition and Research Program, undertook a comprehensive survey of macrofungal diversity in the region from 2019 to 2024, resulting in the collection of over 1,600 specimens. This study identified and documented 480 macrofungal species through combined morphological and molecular evidence, and they belong to two phyla, seven classes, 17 orders, 67 families, and 158 genera. Species composition analyses revealed 15 dominant families (each containing ≥ 10 species): Russulaceae, Agaricaceae, Cortinariaceae, Boletaceae, Inocybaceae, Hymenogastraceae, Omphalotaceae, Entolomataceae, Amanitaceae, Strophariaceae, Hygrophoraceae, Mycenaceae, Psathyrellaceae, Hydnangiaceae, and Lycoperdaceae. At the genus-level, 23 dominant genera (each containing ≥ 5 species), including Lactarius, Russula, and Cortinarius, etc., accounted for 265 species (55.21% of the total diversity). Among the documented species, 115 are edible, 15 are medicinal, and 53 are poisonous. Notably, the study proposed eight new species, i.e., Callistosporium motuoense, Chromosera chayuensis, Clavulinopsis motuoensis, Cudonia linzhiensis, Elaiopezia chayuensis, Sarcoleotia motuoensis, Trichoderma atrosphaericum, and Volvariella parvoalba.
In a recent review published in Science Bulletin, Professor Chen-Yu Zhang’s group at Nanjing University introduced the concept of “RNA immunity”—a previously underrecognized antiviral mechanism in mammals. Small RNAs can move between cells, silence viral genes, and may even be boosted by exercise or absorbed from foods like honeysuckle decoction. Researches now believe this “RNA immunity” may represent a hidden third layer of our immune system, alongside antibodies and immune cells.
A research paper titled "AP2-domain transcription factor WRI5a-regulated MtABCB1 promotes arbuscule development in mycorrhizal symbiosis" was published in Science Bulletin by the research teams of Ertao Wang from the Center of Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, and Nan Yu from Shanghai Normal University. The study discovered that the ABCB family transporter MtABCB1 regulates arbuscule development, potentially through directly exporting auxin into the periarbuscular space.
To address fidelity loss in deep-tissue imaging, Prof. Peng Xi’s team at Peking University developed Confocal² Spinning-Disk Image Scanning Microscopy (C²SD-ISM). By combining spinning-disk confocal microscopy with structured illumination, C²SD-ISM achieves high-fidelity 3D imaging up to 180 μm deep, with 144 nm lateral and 351 nm axial resolution, and retains up to 92% correlation with original confocal images.
A novel meta-absorber efficiently captures noise across seven octaves–spanning most of the human hearing range–by engineering how fine-tuned resonator arrays manipulate and dissipate energy.
The research teams from the City University of Hong Kong and Songshan Lake Materials Laboratory have developed a novel Ti-24Nb-4Zr-8Sn (Ti2448) alloy produced via a cost-effective powder metallurgy method, with low Young’s Modulus, superior corrosion resistance, and good biocompatibility.. The corrosion rate of the Ti2448 alloy, treated with hot isostatic processing and water quenching (SHIPQ), is more than 3.5 times lower than that of the Ti-6Al-4V (Ti64) counterpart, a widely used material for dental and orthopedic implants. In addition, the SHIPQ sample shows superior biocompatibility compared to the Ti64 alloy. Their research paves the way for safer, more affordable orthopedic and dental implants with enhanced performance and long-term stability.
A research team from Shenzhen University, University of Chinese Academy of Sciences and Hong Kong Polytechnic University has developed an innovative, bioinspired hydrogel patch with controllable adhesion properties to enhance soft tissue repair and prevent adhesions. Inspired by octopus suction cups and the eyeball surfaces, this patch features a dual-sided design: one side offers adjustable, revocable adhesion, while the other provides anti-adhesive functions. In vivo experiments demonstrate its effectiveness in reducing inflammation, promoting tissue healing, and allowing repositioning during surgical procedures, marking a significant advancement in biomedical materials.