Large-scale distribution and ecological risk assessment of inorganic arsenic in surface sediments of Chinese marginal seas.

Chinese marginal seas play a crucial role in sea-land interactions, but there is limited large-scale research on the occurrence and ecological risks of As in these areas. This study employed an extensive investigation on the spatial distribution and fractions of As in surface sediments across all four Chinese marginal seas, encompassing 111 sampling sites. The results revealed that the surface sediments exhibited elevated levels of total As content, surpassing those observed in other marginal seas worldwide.

Dynamic evolution of volatile compounds during cold storage of sturgeon fillets analyzed by gas chromatography-ion mobility spectrometry and chemometric methods.

This study investigated the changes in quality and volatile flavoring compounds in sturgeon fillets during refrigeration. Potential flavor compounds were identified using orthogonal partial least squares discriminant analysis (OPLS-DA) and gas chromatography- ion mobility spectrometry (GC-IMS). The results showed that TVB-N content, TBARS values, total colony counts, and K-value increased with prolonged refrigeration, reaching spoilage thresholds after approximately eight days.

Quantitative and dynamic profiling of human gut core microbiota by real-time PCR.

The human gut microbiota refers to a diverse community of microorganisms that symbiotically exist in the human intestinal system. Altered microbial communities have been linked to many human pathologies. However, there is a lack of rapid and efficient methods to assess gut microbiota signatures in practice.

Effects of eugenol on physicochemical properties of sturgeon skin collagen-chitosan composite membrane.

In this study, a series of collagen-chitosan-eugenol (CO-CS-Eu) flow-casting composite films were prepared using collagen from sturgeon skin, chitosan, and eugenol. The physicochemical properties, mechanical properties, microstructure, as well as antioxidant and antimicrobial activities of the composite membranes were investigated by various characterization techniques. The findings revealed that the inclusion of eugenol augmented the thickness of the film, darkened its color, reduced the transparency, and enhanced the ultraviolet light-blocking capabilities, with the physicochemical properties of the CO-CS-0.

Development and evaluation of a multi-target droplet digital PCR assay for highly sensitive and specific detection of Yersinia pestis.

Background: Plague, caused by the bacterium Yersinia pestis, is a zoonotic disease that poses considerable threats to human health. Nucleic acid tests are crucial for plague surveillance and the rapid detection of Y. pestis.

Study on the color-changing mechanism and law of visual formaldehyde sensing system based on hyperbranched polyamines.

This study focuses on addressing the limitations associated with most chemical derivatization methods commonly used for formaldehyde detection. These methods often suffer from prolonged derivative times (≥30 min) and complex procedures, which hinder their ability to meet the requirements of real-time and accurate sensing. In this research, a novel formaldehyde indicator system based on hyperbranched polyamine molecule was developed, and its mechanism and principles of color change were investigated.

Development and evaluation of a multiplex droplet digital polymerase chain reaction method for simultaneous detection of five biothreat pathogens.

Biothreat agents pose a huge threat to human and public health, necessitating the development of rapid and highly sensitive detection approaches. This study establishes a multiplex droplet digital polymerase chain reaction (ddPCR) method for simultaneously detecting five high-risk bacterial biothreats: , , spp., , and .

Cell-based fluorescent microsphere incorporated with carbon dots as a sensitive immunosensor for the rapid detection of Escherichia coli O157 in milk.

The rapid and early detection of foodborne pathogens in contaminated food is important for ensuring food safety and quality. In this study, a highly sensitive fluorescent immunosensor was developed to detect Escherichia coli O157:H7 in milk, by using microspheres labeled with carbon dots (CDs). The CDs-microspheres were prepared with Staphylococcus aureus cells as the carrier to incorporate CDs particles.