scholarly journals Synthesis, Structures, and Antibacterial Activities of Hydrazone Compounds Derived from 4-Dimethylaminobenzohydrazide

2021 ◽  
Vol 68 (3) ◽  
pp. 567-574
Author(s):  
Guo-Xu He ◽  
Ling-Wei Xue
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Nmr Spectra ◽  
Antibacterial Activities ◽  
13C Nmr Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mtt Method ◽  
Antibacterial Material ◽  
And Staphylococcus Aureus

A series of three new hydrazone compounds derived from the condensation reactions of 4-dimethylaminobenzohydrazide with 4-dimethylaminobenzaldehyde, 2-chloro-5-nitrobenzaldehyde and 3-methoxybenzaldehyde, respectively, were prepared. The compounds were characterized by elemental analysis, infrared and UV-vis spectra, HRMS, 1H NMR and 13C NMR spectra, and single crystal X-ray diffraction. Crystals of the compounds are stabilized by hydrogen bonds. The compounds were assayed for antibacterial (Bacillus subtilis, Escherichia coli, Pseudomonas fluorescence and Staphylococcus aureus) and antifungal (Aspergillus niger and Candida albicans) activities by MTT method. The results indicated that compound 2 is an effective antibacterial material.

scholarly journals Antibacterial Activity of Biologically Synthesized Silver and Zinc Nanoparticles Using Allcemilla vulgaris (Layd’s Mantle) Leaf Extract

2019 ◽  
pp. 1-11
Author(s):  
Dilek Demirezen-Yilmaz ◽  
Fatih Doğan Koca ◽  
Nurhan Ertaş-Onmaz
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Inhibitory Concentration ◽  
Escherichia Coli O157 ◽  
X Ray Diffraction ◽  
Zinc Nanoparticles ◽  
X Ray ◽  
Vis Spectroscopy ◽  
And Staphylococcus Aureus ◽  
Antibacterial Potential

In this study, the powder of Allcemilla vulgaris was used in the sythesis of silver and zinc nanoparticle. Biologically synthesized nanoparticles were characterized using Scanning Electron Microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, X-ray diffraction (XRD) and Zeta potential and then evaluated for antibacterial potential using micro dilution broth method. The minimum inhibitory concentration values of AgNP were 4.25 µg/mL and 6.64 µg/ mL for Escherichia coli O157:H7 and Staphylococcus aureus, respectively. Similarly, the MIC values of ZnNP were 3.32 µg/mL and 6.25 µg/mL, respectively for Escherichia coli O157:H7 and Staphylococcus aureus.

Synthesis, Antioxidant and Antibacterial Activities of Salicylaldehyde Azine

2011 ◽  
Vol 396-398 ◽  
pp. 2366-2369 ◽  
Author(s):  
Dong Qing Li ◽  
Ming Xiong Tan ◽  
Luo Jie
Keyword(s):  
Crystal Structure ◽  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Antibacterial Activities ◽  
Raw Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Total Antioxidant

Salicylaldehyde azine (SA) were synthesized with salicylaldehyde and hydrazine hydrate as a raw material. The crystal structure was characterized by X-ray diffraction, as well as the total antioxidant capacity and antibacterial activities against Staphylococcus aureus and Escherichia coli were investigated. It was found that SA exhibited significant antibacterial activities and total antioxidant capacity.

scholarly journals Synthesis of CoFe 2 O 4 /BiOI Nanocomposite: Effects on Staphylococcus aureus, Escherichia coli, Pseudomonas Aeruginosa and Bacillus Cereus

2021 ◽  
Author(s):  
Davood Gheidari ◽  
Morteza Mehrdad ◽  
Saloomeh Maleki ◽  
Samanesadat Hosseini
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Bacillus Cereus ◽  
Antibacterial Properties ◽  
Limited Area ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inhibition Concentration ◽  
Resolution Mapping

Abstract With the increase of general knowledge and the advancement of science and technology, antibacterial substances were used more than antibiotics. In our current study, the antibacterial virtues of CFO/BiOI nanocomposite were investigated due to its high importance on Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Bacillus cereus. MIC, MBC , Disk Diffusion and IC50 tests Cefalotin (CF), Amoxicillin (AMX), Gentamicin (GM), Trimethoprim-sulphamethoxazole (SXT) and Ceftriaxone (CRO) antibiotics in concentration 30W, 10i, 10t , 25h and 30 were used to find the antibacterial properties of the synthesized nanocomposite, respectively. For the synthesis of nanocomposites polyethylene glycol (PEG) and sulfonic acid was used as a solvent. It is noteworthy that the synthesis was performed by heat dissolution method without the presence of surfactant. Also, various techniques such as X-Ray Diffraction(XRD), Scanning Electron Microscope (SEM), High resolution mapping and Energy Dispersive X-ray spectroscopy (EDAX) have been used to determine the properties of produced nanocomposites. SEM test results showed that the formed nanoparticles were globular and their size was limited area of 22 to 34 nm. The results showed CFO / BiOI nanocomposite exhibits strong significant biological activity against Bacillus cereus. The results of MBC (Minimum Bactericidal Concentration) and MIC (Minimum Inhibition Concentration) tests for CFO/BiOI nanocomposites on bacteria were examined in the range of 0.12-0.48 mg/ml and 0.06 to 0.24 mg/ml respectively. According to the results, the minimum IC50 value was determined at a concentration of 0.061 mg/ml. On the other hand, the most resisting and susceptible bacteria in this method were Pseudomonas aeruginosa and Bacillus cereus, respectively. These findings are identical to those of a prior study on CoFe2O4 nanoparticles antibacterial properties. MBC of the nanocomposites, 50 µl from all the tubes that showed no obvious bacterial growth were distributed on BHI agar plates and incubated for 24 h at 37 ◦C. The MBC endpoint is defined as the lowest concentration which killed 98% of the bacterial population.

scholarly journals Copper(II) and Zinc(II) Complexes Derived from N,N’-Bis(4-bromosalicylidene)propane-1,3-diamine: Syntheses, Crystal Structures and Antimicrobial Activity

2021 ◽  
Vol 68 (1) ◽  
pp. 102-108
Author(s):  
Yu-Mei Hao
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Candida Parapsilosis ◽  
Antibacterial Activities ◽  
X Ray Diffraction ◽  
Deprotonated Form ◽  
X Ray ◽  
Square Planar ◽  
Vis Spectroscopy ◽  
Elemental Analyses

A mononuclear copper(II) complex, [CuL] (1), and a phenolato-bridged trinuclear zinc(II) complex, [Zn3Cl2L2(DMF)2] (2), where L is the deprotonated form of N,N’-bis(4-bromosalicylidene)propane-1,3-diamine (H2L), have been prepared and characterized by elemental analyses, IR and UV-Vis spectroscopy, and single crystal X-ray diffraction. The Cu atom in complex 1 is in square planar coordination, while the terminal and central Zn atoms in complex 2 are in square pyramidal and octahedral coordination, respectively. The antibacterial activities of the complexes have been tested on the bacteria Staphylococcus aureus and Escherichia coli, and the yeast Candida parapsilosis.

scholarly journals Synthesis of Cationic Pd(II) Complexes with 5-Membered Ring Chelating Iminoylcarbene Ligand and Its Catalytic Activity on Norbornene Polymerization

2019 ◽  
Vol 31 (3) ◽  
pp. 637-641
Author(s):  
Roushown Ali ◽  
Jubaraj Chandra ◽  
Tariqul Hasan
Keyword(s):  
Catalytic Activity ◽  
Nmr Spectra ◽  
Membered Ring ◽  
Moderate Activity ◽  
13C Nmr Spectra ◽  
X Ray Diffraction ◽  
1H And 13C Nmr ◽  
X Ray ◽  
Addition Polymerization ◽  
Norbornene Polymerization

Iminoyl N-heterocyclic carbine ligand with cationic allyl Pd(II) complex (3) was successfully synthesized by transmetallation of corresponding Ag complex with one equivalent of [Pd(allyl)(COD)]+SbF6–. A slightly distorted square planer structure of the Pd(II) complex 3 was confirmed by single crystal X-ray diffraction analysis. The Pd(II) complex 3 is stable in air and found to show moderate activity in the polymerization of norbornene without any activator. The polynorbornene produced with Pd(II) complex 3 was obtained to be stable up to 440 °C. The 1H and 13C NMR spectra of the polymer indicated addition polymerization of norbornene and the presence of the vinylene group at the end of polymer chain.

Rhodomyrtone, an antibotic from Rhodomyrtus tomentosa

2002 ◽  
Vol 55 (3) ◽  
pp. 229 ◽  
Author(s):  
Dachriyanus Salni ◽  
M. V. Sargent ◽  
B. W. Skelton ◽  
I. Soediro ◽  
M. Sutisna ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Ethyl Acetate ◽  
Single Crystal ◽  
Ethyl Acetate Extract ◽  
Significant Activity ◽  
Structural Determination ◽  
X Ray ◽  
And Staphylococcus Aureus ◽  
Rhodomyrtus Tomentosa

The ethyl acetate extract of the leaves of Rhodomyrtus tomentosa (Ait.) Hassk. yielded rhodomyrtone (5) [6,8-dihydroxy-2,2,4,4-tetramethyl-7-(3-methyl-1-oxobutyl)-9-(2-methylpropyl)-4,9-dihydro-1H-xanthene-1,3(2H)-di-one] which had significant activity against Escherichia coli and Staphylococcus aureus. The structural elucidation followed from spectroscopic evidence and from a single-crystal X-ray structural determination.

Preparation, Characterization and Antibacterial Activity of Chitosan Schiffbases

2011 ◽  
Vol 287-290 ◽  
pp. 1947-1951 ◽  
Author(s):  
Jing Xian Xu ◽  
Ye Ting Lin ◽  
Qiang Lin ◽  
Wen Yuan ◽  
Xue Qiong Yin ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Schiff Bases ◽  
Optical Density ◽  
Elemental Analysis ◽  
Antibacterial Activities ◽  
Cp Mas Nmr ◽  
And Staphylococcus Aureus ◽  
Better Than

Two Schiff bases of chitosan (CTS) were synthesized from 4-methoxylbenzylaldehyde (CH3O-CTS) and 4-methylbenzylaldehyde(CH3-CTS). The Schiff bases were characterized by FTIR, DSC-TGA, solid13C CP-Mas NMR, and elemental analysis. Antibacterial activities of the Schiff bases against Escherichia coli and Staphylococcus aureus were measured by the optical density method. The antibacterial activity of the Schiff bases is better than that of the original CTS. The IC50of CH3O-CTS and CH3-CTS againstEscherichia coliis respectively 40.3 ppm and 43 ppm, which being 38.5 ppm and 39.5 ppm against Staphylococcus aureus, lower than IC50of chitosan, being 59.5 ppm and 52 ppm againstEscherichia coliand Staphylococcus aureus, respectively.

scholarly journals UJI AKTIVITAS ANTIBAKTERI DARI ISOLAT CENDAWAN ENDOFIT ASAL TUMBUHAN SENDUDUK (Melastoma malabathricum L.) TERHADAP Escherichia coli DAN Staphylococcus aureus

2018 ◽  
Vol 8 (2) ◽  
pp. 7-12
Author(s):  
Israwati Harahap ◽  
Vivin Paddillah Rahmi ◽  
Nofripa Herlina
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Endophytic Fungi ◽  
Inhibition Zone ◽  
Antibacterial Activities ◽  
Zone Of Inhibition ◽  
Melastoma Malabathricum ◽  
Symbiotic Microorganism ◽  
And Staphylococcus Aureus ◽  
Test Result

Endophytic fungi is a symbiotic microorganism which live inside plant tissues and not harm to their host. Several genera from endophytic fungi known to produce secondary metabolite compounds like antibiotics, anticancer, antifungal, antiviral and antimalarial. This study aimed to investigate antibacterial activity of endophytic fungi from senduduk (Melastoma malabathricum L.) against Escherichia coli and Staphylococcus aureus. Based on the test result, 11 isolates endophytic fungi from senduduk were known to have antibacterial activities. Isolate code 23 have ability to inhibit the growth of E.coli with diameters zone of inhibition is 22 mm and eight isolate endophytic fungi have ability to inhibit the growth of S.aureus (showed by inhibition zone).

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