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Development of a Simultaneous Analytical Method for Amines Corresponding to 10 Typical Nitrosamines.
ACS Omega
January 2025
Towa Pharmaceutical Co., Ltd., 2-11 Shinbashi-cho, Kadoma, Osaka 571-8580, Japan.
Regulatory authorities in various countries have successively issued notices and guidance to pharmaceutical manufacturers and distributors to evaluate the risk of contamination of nitrosamines in pharmaceutical products and to take appropriate measures. Analysis of nitrosamines in pharmaceutical products is not easy due to the large number of foreign substances, and the risk of contamination is determined by first conducting a desk investigation of the manufacturing process of the APIs or pharmaceutical products. However, a desk investigation may miss the risk since this method is not based on actual measurements.
View Article and Find Full Text PDFCRISPR-Based Homogeneous Electrochemical Strategy for Near-Zero Background Detection of Breast Cancer Extracellular Vesicles via Fluidity-Enhanced Magnetic Capture Nanoprobe.
Anal Chem
January 2025
College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, People's Republic of China.
Precise identification and analysis of multiple protein biomarkers on the surface of breast cancer cell-derived extracellular vesicles (BC-EVs) are of great significance for noninvasive diagnosis of the breast cancer subtypes, but it remains a major challenge owing to their high heterogeneity and low abundance. Herein, we established a CRISPR-based homogeneous electrochemical strategy for near-zero background and ultrasensitive detection of BC-EVs. To realize the high-performance capture and isolation of BC-EVs, fluidity-enhanced magnetic nanoprobes were facilely prepared.
View Article and Find Full Text PDFSimultaneously Transmitting and Reflecting Reconfigurable Intelligent Surfaces Empowered Cooperative Rate Splitting with User Relaying.
Entropy (Basel)
November 2024
School of Information Science and Technology, Shanghai Tech University, Shanghai 201210, China.
In this work, we unveil the advantages of synergizing cooperative rate splitting (CRS) with user relaying and simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR RIS). Specifically, we propose a novel STAR RIS-assisted CRS transmission framework, featuring six unique transmission modes that leverage various combinations of the relaying protocols (including full duplex-FD and half duplex-HD) and the STAR RIS configuration protocols (including energy splitting-ES, mode switching-MS, and time splitting-TS). With the objective of maximizing the minimum user rate, we then propose a unified successive convex approximation (SCA)-based alternative optimization (AO) algorithm to jointly optimize the transmit active beamforming, common rate allocation, STAR RIS passive beamforming, as well as time allocation (for HD or TS protocols) subject to the transmit power constraint at the base station (BS) and the law of energy conservation at the STAR RIS.
View Article and Find Full Text PDFDeciphering nitrogen removal performance concerning heterotrophic microorganism's succession by using three typical acid-rich fermentation liquids of food waste as carbon sources in high ammonium and high salt wastewater treatment.
Environ Res
January 2025
Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210095, China. Electronic address:
Understanding the performance and microbial succession in nitrogen removal using fermentation liquid as carbon source can provide a practical basis for treating low C/N ratio wastewater. In this study, three typical fermentation liquids of food waste (FW) enriched with lactic acid (LA), propionic acid (PA), and butyric acid (BA) were added to high ammonia and high salt (HAHS) wastewater treatment process. Results showed that effluent TN decreased from 50 mg/L to around 15 mg/L with the influent concentration around 1000 mg/L after adding fermentation liquid enriched with LA and PA.
View Article and Find Full Text PDFHyperspectral inversion of heavy metal content in farmland soil under conservation tillage of black soils.
Sci Rep
January 2025
College of Jilin Emergency Management, Changchun Institute of Technology, Changchun, 130012, China.
Globally, heavy metal (HM) soil pollution is becoming an increasingly serious concern. Heavy metals in soils pose significant environmental and health risks due to their persistence, toxicity, and potential for bioaccumulation. These metals often originate from anthropogenic activities such as industrial emissions, agricultural practices, and improper waste disposal.
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