The authors describe a fluorometric method for the quantification of tannic acid (TA). MoO quantum dots (QDs) can selectively capture TA via the formation of an organic molybdate complex. This causes an electron transfer effect and an inner filter effect to result in synergistic quenching of the fluorescence of the QDs. TA can be detected via this effect with a linear response in the of 0.1-10 μM concentration range and a lower detection limit of 30 nM within 1 min. The use of such QDs as a quenchable fluorescent probe warrants good selectivity even in the presence of relatively high concentration of potentially interferents and makes the method suitable for real sample analysis. Graphical abstract Tannic acid can be rapidly and selectively detected in food using a MoO quantum dots based fluorometric assay.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00604-019-3311-2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spatiotemporal Dynamic Immunomodulation by Infection-Mimicking Gels Enhances Broad and Durable Protective Immunity Against Heterologous Viruses.
Adv Sci (Weinh)
January 2025
SKKU Advanced Institute of Nanotechnology (SAINT), Department of Nano Engineering, Department of Nano Science and Technology, School of Chemical Engineering, Biomedical Institute for Convergence at SKKU, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea.
Despite their safety and widespread use, conventional protein antigen-based subunit vaccines face significant challenges such as low immunogenicity, insufficient long-term immunity, poor CD8 T-cell activation, and poor adaptation to viral variants. To address these issues, an infection-mimicking gel (IM-Gel) is developed that is designed to emulate the spatiotemporal dynamics of immune stimulation in acute viral infections through in situ supramolecular self-assembly of nanoparticulate-TLR7/8a (NP-TLR7/8a) and an antigen with tannic acid (TA). Through collagen-binding properties of TA, the IM-Gel enables sustained delivery and enhanced retention of NP-TLR7/8a and protein antigen in the lymph node subcapsular sinus of mice for over 7 days, prolonging the exposure of vaccine components in both B cell and T cell zones, leading to robust humoral and cellular responses.
View Article and Find Full Text PDFSynergistic effect of proanthocyanidins and cefquinoxime sulfate on methicillin-resistant Staphylococcus aureus.
Pak J Pharm Sci
January 2025
Innovation Center Laboratory for Traditional Chinese Veterinary Medicine (TCVM), College of Veterinary Medicine, China Agricultural University, Beijing, China.
To address the severe problem of methicillin-resistant Staphylococcus aureus (MRSA) resistance, this study identified a single component from traditional Chinese medicine that, when used in combination with existing antibiotics, enhances the therapeutic efficacy of the antimicrobial drugs. Using the micro broth dilution method and the checkerboard dilution method, susceptibility tests were conducted on ten commonly used β-lactam antibiotics against eleven strains of MRSA. It was found that cefquinome sulfate exhibits synergistic activity with PROs.
View Article and Find Full Text PDFPreparation and stability of chebulagic acid and chebulinic acid from Terminalia chebula and their biological activity.
Pak J Pharm Sci
January 2025
College of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian, China/Province Multi-Component Chinese Medicine Engineering Technology Research Center of Liaoning, Dalian, China/Modern Traditional Chinese Medicine Research and Engineering Laboratory of Liaoning, Dalian, China.
Chebulagic acid and chebulinic acid are the two tannin compounds with the highest content in Terminalia chebula, they were separated by ODS column eluted with 20% methanol and 35% methanol, respectively. The compounds were identified by comparing the data of H NMR and C NMR with the literature; HPLC method was used to investigate the stable storage conditions of chebulagic acid and chebulinic acid; lipopolysaccharide (LPS) induced in vivo inflammation model and RAW264.7 macrophage in vitro inflammatory model to evaluate the anti-inflammatory activities of chebulagic acid and chebulinic acid.
View Article and Find Full Text PDFRoom-temperature and recyclable preparation of cellulose nanofibers using deep eutectic solvents for multifunctional sensor applications.
Int J Biol Macromol
January 2025
State Key Lab for Hubei New Textile Materials and Advanced Processing Technology, College of Materials Science & Engineering, College of Textile Science & Engineering, Wuhan Textile University, 430200 Wuhan, China. Electronic address:
Cellulose nanofibers (CNFs) have gained increasing attention due to their robust mechanical properties, favorable biocompatibility, and facile surface modification. However, green and recyclable CNF production remains challenging. Herein, a green, low-cost and room-temperature strategy was developed to exfoliate CNFs using deep eutectic solvents.
View Article and Find Full Text PDFAnti-inflammatory, immunostimulant and antimicrobial properties of tannic acid in the diet of Oreochromis niloticus infected with Aeromonas hydrophila.
Fish Shellfish Immunol
January 2025
Aquatic Organisms Health Laboratory (AQUOS), Aquaculture Department, UFSC, Rodovia Admar Gonzaga 1346, 88037-000 Florianópolis, SC, Brazil. Electronic address:
The study aimed to assess the impact of dietary supplementation with tannic acid on the growth, health, and survival of Oreochromis niloticus following exposure to Aeromonas hydrophila. A total of 320 fish were divided into 16 tanks and assigned to four treatment groups: feed with 0.2% tannic acid (TA), 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!