In this research we evaluated the antibacterial activity of water soluble green tea extracts on isolates of Acinetobacter. A total of 20 strains were collected from burn wounds at different hospitals in Tehran, Iran. The susceptibilities of isolates to different antibiotics were tested using agar disk diffusion method. Antibacterial activity of water soluble green tea extract was measured by Minimum Bactericidal Concentrations (MBCs). Seventy five percent of isolated strains showed resistance to at least 12 antibiotics or more and all the strains were Multi-drug Resistant (MDR) strains. The average MBCs of the extract against all strains of Acinetobacter were 387.5 +/- 127.6 microg mL(-1). Present study suggests that green tea has significant bactericidal action on multi-drug resistant strains of Acinetobacter.
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http://dx.doi.org/10.3923/pjbs.2007.1477.1480 | DOI Listing |
Environ Toxicol
January 2025
Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan.
The epithelial-mesenchymal transition (EMT) assists in the acquisition of invasiveness, relapse, and resistance in non-small cell lung cancer (NSCLC) and can be caused by the signaling of transforming growth factor-β1 (TGF-β1) through Smad-mediated or Smad-independent pathways. (-)-Epigallocatechin-3-gallate (EGCG), a multifunctional cancer-preventing bioconstituent found in tea polyphenols, has been shown to repress TGF-β1-triggered EMT in the human NSCLC A549 cell line by inhibiting the activation of Smad2 and Erk1/2 or reducing the acetylation of Smad2 and Smad3. However, its impact on the Smad-independent pathway remains unclear.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
NBFC - National Biodiversity Future Center, 90133 Palermo, Italy; University of Naples Federico II, Department of Biology, Naples, Italy. Electronic address:
Bio-valorization of agri-food wastes lies in their possible conversion into fermented foodstuffs/beverages and/or biodegradable polymers such as bacterial cellulose. In this study, three different kombucha cultures were formulated using agri-food waste materials, citrus fruit residues and used coffee grounds, as alternative carbon and nitrogen sources, respectively. Over 21 days of fermentation, the kinetic profile was followed by monitoring cell number, pH variation, minerals, trace elements and production of bacterial cellulose.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
January 2025
School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030000, Shanxi, PR China. Electronic address:
In this study, carbon dots doped with silver and nitrogen (Ag,N-CDs) were synthesized and their application in chemiluminescence (CL) was investigated using the potassium ferricyanide/hydrogen peroxide (KFe(CN)/HO) reaction. Theoretical calculations reveal that Ag doping facilitates a lower excitation energy. The experimental conditions influencing the CL reaction were examined and optimized.
View Article and Find Full Text PDFSci Rep
January 2025
Department of Physics, Khalifa University of Science and Technology, 127788, Abu Dhabi, United Arab Emirates.
In this study, biopolymer composites based on chitosan (CS) with enhanced optical properties were functionalized using Manganese metal complexes and black tea solution dyes. The results indicate that CS with Mn-complexes can produce polymer hybrids with high absorption, high refractive index and controlled optical band gaps, with a significant reduction from 6.24 eV to 1.
View Article and Find Full Text PDFSurgery
January 2025
Hepato Pancreato Biliary and Liver Transplant Surgery of the Department of Surgery Oncology and Gastroenterology (DiSCOG), Padova University, Padova, Italy. Electronic address:
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