Femtomolar hydrogen sulfide detection via hybrid small-molecule nano-arrays.

Early disease diagnosis hinges on the sensitive detection of signaling molecules. Among these, hydrogen sulfide (HS) has emerged as a critical player in cardiovascular and nervous system signaling. On-chip immunoassays, particularly nanoarray-based interfacial detection, offer promising avenues for ultra-sensitive analysis due to their confined reaction volumes and precise signal localization.

Construction and application of a three-dimensional vascular variation-based nephrometry scoring system for completely endophytic renal tumors.

Background: Completely endophytic renal tumors (CERT) pose significant challenges due to their anatomical complexity and loss of visual clues about tumor location. A facile scoring model based on three-dimensional (3D) reconstructed images will assist in better assessing tumor location and vascular variations.

Methods: In this retrospective study, 80 patients diagnosed with CERT were included.

Environmental regulation and corporate exports: Quasi-experimental evidence from China's environmental protection tax law.

How can we create a dual benefit scenario that improves both the ecological environment and export performance? This study aims to investigate whether the introduction of the Environmental Protection Tax Law (EPTL) has promoted the growth of corporate export. By treating the formal implementation of China's EPTL on January 1, 2018, as an exogenous economic event, this paper takes A-share listed companies in China from 2013 to 2022 as a sample and uses the Difference-in-Differences (DID) model to analyze the specific effects of the EPTL on corporate exports. The results indicate that the EPTL improves corporate exports significantly.

Boosting Enzyme-Like Activity Through Controlled Coordination of Metal Single-Atoms in Rhombic Cavity of Graphyne.

The coordination number of metal single-atoms, being an important factor, should be precisely controlled as it affects both activity and specificity. Herein, the introduction of nitrogen into the para position of benzene in graphyne (2N-GY) is proposed as a carrier for anchoring metal single-atoms onto pyrazine nitrogen. These atoms are then coordinated to the center of the rhombic cavity, ensuring precisely controlled coordination numbers.

Passivation of acceptors in GaN by hydrogen and their activation.

GaN is an important semiconductor for energy-efficient light-emitting devices. Hydrogen plays a crucial role in gallium nitride (GaN) growth and processing. It can form electrically neutral complexes with acceptors during growth, which significantly increases the acceptor incorporation.