scholarly journals In-Vitro Antibacterial and Antifungal Effects of High Levels of Chinese Star Anise

2019 ◽  
Vol 21 (1) ◽  
Author(s):  
MS Alhajj ◽  
MAA Qasem ◽  
AR Jar El Nabi ◽  
SI Al-Mufarrej
2020 ◽  
Vol 49 (4) ◽  
pp. 515-523
Author(s):  
S. Kolayli ◽  
I. Palabiyik ◽  
D.S. Atik ◽  
M. Keskin ◽  
A. Bozdeveci ◽  
...  

Honey is the most important bee product. There are many secondary metabolites, carbohydrates, enzymes, and vitamins in honey, thus, honey has antimicrobial activity. In this study, in vitro antimicrobial activity of forty-two honey and eight propolis ethanolic extracts (PEE) were investigated against 16 microorganisms. Total phenolic content ranged between 20.00–124.10 mg GAE/100 g and 103–232 mg GAE/g for honey and raw propolis samples, respectively. Pine and oak honeydew honeys had higher antimicrobial activity than four different grades of Manuka Honeys up to 18 mm minimum inhibition zone diameters. The ethanolic propolis extracts showed much higher antimicrobial activity than the honey samples. Fungi species were inhibited by the propolis samples. Helicobacter pylorii (H. pylorii) was the most sensitive, whereas Streptococcus agalactiae was the most resistant bacteria among the studied microorganisms. Brazilian and Zonguldak propolis had the closest antimicrobial activity to ampicillin, streptomycin, and fluconazole. It can be concluded that both honey and propolis could be used in preservative and complementary medicine.


2020 ◽  
Vol 24 (19) ◽  
pp. 2272-2282
Author(s):  
Vu Ngoc Toan ◽  
Nguyen Minh Tri ◽  
Nguyen Dinh Thanh

Several 6- and 7-alkoxy-2-oxo-2H-chromene-4-carbaldehydes were prepared from corresponding alkyl ethers of 6- and 7-hydroxy-4-methyl-2-oxo-2H-chromen-2-ones by oxidation using selenium dioxide. 6- and 7-Alkoxy-4-methyl-2H-chromenes were obtained with yields of 57-85%. Corresponding 4-carbaldehyde derivatives were prepared with yields of 41-67%. Thiosemicarbazones of these aldehydes with D-galactose moiety were synthesized by reaction of these aldehydes with N-(2,3,4,6-tetra-O-acetyl-β-Dgalactopyranosyl) thiosemicarbazide with yields of 62-74%. These thiosemicarbazones were screened for their antibacterial and antifungal activities in vitro against bacteria, such as Staphylococcus aureus, Escherichia coli, and fungi, such as Aspergillus niger, Candida albicans. Several compounds exhibited strong inhibitory activity with MIC values of 0.78- 1.56 μM, including 8a (against S. aureus, E. coli, and C. albicans), 8d (against E. coli and A. niger), 9a (against S. aureus), and 9c (against S. aureus and C. albicans).


2020 ◽  
Vol 16 ◽  
Author(s):  
Adinath D. Badar ◽  
Shubham M. Sulakhe ◽  
Mahesh B. Muluk ◽  
Naziya N. M. A. Rehman ◽  
Prashant P. Dixit ◽  
...  

Background: Thiosemicarbazone, 1,2,3-triazole and their derivatives received great pharmaceutical importance due to their prominent biological activities. In the present study, the molecular hybrid thiosemicarbazone-1,2,3-triazoles derivatives were synthesized and screened for their antimicrobial activities. Methods: A series of thiosemicarbazone clubbed with 1,2,3-triazole derivatives were synthesized via click chemistry approach in good yields. The structures of synthesized compounds were assigned by their spectral data. The in vitro antimicrobial activity was performed by the agar well diffusion method. A molecular docking study was performed to identify the possible mode of action of synthesized derivatives. Results: The compounds 5d, 5h, 5i and 5k have exhibited excellent antimicrobial activities against both antibacterial and antifungal pathogens. The active thiosemicarbazone-1,2,3-triazole derivatives have shown excellent binding affinity towards DNA gyrase. Conclusion: The molecular hybrid thiosemicarbazone-1,2,3-triazole derivatives were synthesized. The newly synthesized compounds were evaluated for their antimicrobial activities. Few of the thiosemicarbazone-1,2,3-triazoles derivatives have exhibited good antimicrobial activities. They have been shown excellent binding affinity towards DNA gyrase.


2008 ◽  
Vol 116 (Supplement) ◽  
pp. S1-S4 ◽  
Author(s):  
Yoshihiro MIHARA ◽  
Tomoya TAKADA ◽  
Naotsugu UNO ◽  
Iwao TOGASHI ◽  
Keisuke SUGIMOTO

2021 ◽  
pp. 108201322110530
Author(s):  
Hanan H Abdel-Khalek ◽  
Ali AI Hammad ◽  
Reham MMA El-Kader ◽  
Khayria A Youssef ◽  
Dalia AM Abdou

The purpose of this study was to investigate the effects of certain essential oils (star anise, lemon leaves, marjoram, fennel, and lavender) on the fungal growth of Aspergillus flavus and Aspergillus parasiticus and their production of aflatoxin B1 (AFB1). The degree of suppression of the aflatoxigenic strains’ growth and their production of AFB1 is mainly affected by the kind and the concentration of the tested essential oils (EOs). Star anise essential oil had the lowest minimum inhibitory concentration (0.5 and 1.0 μL/mL) against A. flavus and A. parasiticus, respectively, so it was the best among the five different oils. The study of liquid chromatography with tandem mass spectrometry revealed that star anise EO resulted in a 98% reduction in AFB1 without a breakdown of AFB1 products after treatment thus the complete removal of AFB1 was done without any toxic residues. The combination showed a synergistic effect, the combinational treatment between γ-irradiation at a low dose (2 kGy) and star anise EO at concentrate 0.5 μL/g destroyed A. flavus and A. parasiticus inoculated (individually) in sorghum and peanut, respectively throughout the storage period (8 weeks).


Mycoscience ◽  
2009 ◽  
Vol 50 (5) ◽  
pp. 380-387 ◽  
Author(s):  
Claudia Ordóñez-Valencia ◽  
Alejandro Alarcón ◽  
Ronald Ferrera-Cerrato ◽  
Laura Verónica Hernández-Cuevas

Sign in / Sign up

Export Citation Format

Share Document