E. coli curli fimbria are produced during starvation and at room temperature. In the study curli synthesis among E. coli strains isolated from children with diarrhea and healthy children was investigated at human body temperature and in the variable atmosphere conditions: aerobic, supplemented with CO2 and anaerobic. The ability of curli synthesis was estimated using qualitative and quantitative methods basing on Congo red binding by curli. Curli production of all E. coli strains examined was observed at temperature 37 degrees C during anaerobic cultivation, confirming their role in colonization of intestinal mucosa.
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J Fluoresc
January 2025
Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, 713104, India.
Nitrogen doped Carbon Quantum Dots (NCQDs) have been synthesized using most economical and easiest hydrothermal process. Here, N-phenyl orthophenylenediamine and citric acid were utilised as a source of nitrogen and carbon for the preparation of NCQDs. The synthesized NCQDs were characterized using experimental techniques like UV - Vis absorption, FT-IR, transmission electron microscopy (TEM), X-ray Diffraction (XRD), EDX, dynamic light scattering (DLS), fluorimeter and time resolved fluorescence spectroscopy.
View Article and Find Full Text PDFNucleic Acids Res
January 2025
Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, NO.1800, Lihu avenue, Wuxi 214122, China.
Inducible systems are crucial to metabolic engineering and synthetic biology, enabling organisms that function as biosensors and produce valuable compounds. However, almost all inducible systems are strain-specific, limiting comparative analyses and applications across strains rapidly. This study designed and presented a robust workflow for developing the cross-species inducible system.
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December 2024
Facultad de Veterinaria, Instituto Agroalimentario de Aragón-IA2, Universidad de Zaragoza-CITA, 50013 Zaragoza, Spain.
The objective of the present work was to examine the effect of incorporating spirulina powder (SP) in -type sausages made exclusively with camel meat, as well as to evaluate its physicochemical, microbiological, and sensory quality attributes and its prebiotic potential. The final purpose was to offer an innovative meat product to increase camel meat consumption. Several innovative fresh sausage formulations were developed using SP (00, 100, 250, and 500 mg/kg) and stored under vacuum conditions with refrigeration at 1 ± 1 °C for 35 days.
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December 2024
Instituto de Ciencias de la Vid y del Vino (ICVV) (Universidad de La Rioja, Consejo Superior de Investigaciones Científicas (CSIC), Gobierno de La Rioja), 26007 Logroño, Spain.
The objectives of this study were to obtain and characterise polyphenolic extracts from red grape pomace of L. cv Graciano via conventional solvent extraction (SE) and green supercritical fluid extraction (SFE) and to evaluate their antibacterial activity against susceptible and multidrug-resistant strains of intestinal origin. The SE and SFE methods were optimised, and ultra-performance liquid chromatography/mass spectrometry (UPLC/QqQ-MS/MS) analysis revealed 38 phenolic compounds in the SE sample, with anthocyanins being the predominant polyphenols, and 21 phenolic compounds in the SFE samples, among which hydroxybenzoic acids and flavonols were the predominant compounds.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Department of Bacterial Molecular Genetics, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland.
Enterohemorrhagic (EHEC) is a common pathotype of that causes numerous outbreaks of foodborne illnesses. EHEC is a zoonotic pathogen that is transmitted from animals to humans. Ruminants, particularly cattle, are considered important reservoirs for virulent EHEC strains.
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