Có 20+ tài liệu thuộc chủ đề "Antibacterial activity"
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7.27 (d, J = 7.8 Hz, 2H, H-3. and m, 2H, H-2. 7.15 (d, J = 7.2 Hz, 1H, H-3. 7.62 (d, J = 8.0 Hz, 2H, H-2. 7.32 (d, J = 8.0 Hz, 2H, H-3. 3.98 (q, J = 7.2 Hz, 2H, O-CH 2. 3.71–3.68 (m, 2H, H e -2 ′ &. 2.54–2.48 (m, 2H, H a -2 ′...
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Physicochemical characterization of different cellulose polymorphs/graphene oxide composites and their antibacterial activity. Abstract: In order to investigate the interaction of graphene oxide (GO) with different cellulose polymorphs (I and II), we synthesized cellulose (I and II)/GO composites using the sonication method. Interestingly, no new peaks were observed in the FT-IR pattern of the cellulose (I and II)/GO composites, indicating that...
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Abstract: A new heterogeneous acid catalyst based on a natural resource, Tunisian clay (Clay-H0.5), has been prepared and characterized by FT-IR, FE-SEM, and powder X-ray diffraction (XRD), as well as chemical composition, cation exchange capacity, specific surface area, and pore volume. This achieved up to 92% isolated yield for only 10 wt.% of the catalyst. Importantly, the Clay-H0.5 catalyst showed...
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It can be seen from the 1 H NMR spectrum of compound 6g that at δ 8.36 ppm is H adjacent to the N atom on the pyridine ring, and it is coupled by the H atom in the meta position, split into a doublet, with coupling constant J = 5.7 Hz. Due to the H coupling of the ortho...
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The role of diazacrown ether in the enhancement of the biological activity of silver nanoparticles. Abstract: The nanostructuring of hydroxyl-substituted diazacrown-ether (DC) by silver nanoparticles was obtained by green synthesis method in order to increase the antibacterial activity of silver nanoparticles. The Ag@DC nanostructures were uniform and their sizes ranged from 8 to 18 nm. IR and UV spectra revealed...
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Bioreduction: the biological activity, characterization, and synthesis of silver nanoparticles. Initially, physical and chemical methods were used in the synthesis of nanoparticles. In this study, green synthesis of silver nanoparticles (AgNPs) with the leaf extract of Anthurium andraeanum was performed. As a result of the characterization, the spectra showed that a spectrum at a wavelength of about 419 nm and...
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doi:10.3906/kim-2005-19. Antibiotic resistance is one of the leading public health concerns of the current age [1, 2], mainly due to the emergence, spread, and persistence of multidrug-resistant (MDR) bacteria or ‘superbugs’ which cannot be treated with conventional remedies. The plausible causes of the antimicrobial resistance are the widespread use of antibiotics and the weary antibiotic research progress [3]. In many...
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2.65 (2H, t, J=10.8 Hz, piperidine H 6. N, 10.00. N, 10.14. 7.86 (2H, d, J= 1.2 Hz, phenyl H 5 +H 6. C 13 -NMR (100 MHz, DMSO) δ 177.7 (C=S), 156.6 (C=N), 149.7 (phenyl C 1. 134.9 (phenyl C 4. 132.4 (phenyl C 3. 131.8 (phenyl C 5. 127.7 (phenyl C 3 ’+C 5. 127.6 (phenyl C 4....
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The extract of ginger and kumquat mixture exhibited the highest free radical scavenging activity (85. glabra (60% and 53%, respectively) at the concentration of 0.1 mg/ml. Moreover, the agar well diffusion assay revealed that the extract of S.. glabra and the extract of ginger and kumquat mixture were effective in inhibition against Bacillus cereus, Staphylococcus aureus, and Vibrio parahaemolyticus. Especially,...
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it is currently happening now, all over the world, and is compromising the capacity to cure serious illnesses in the society and health centers (Aslam et al., 2018). Van den Honert et al., 2021).. The first β-lactamase with an expanded spectrum was discovered in Germany in the mid-1980s (Kliebe et al., 1985. Although, MRSA has received a lot of attention...
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We developed a novel BW-CS/ZnHA biocomposite utilizing Beeswax-Chitosan and Zinc-hydroxyapatite nanoparticles (ZnHAP). Moreover, the antibacterial, swelling, biodegradations, viability, and cell proliferation capacity of the fabricated biocomposite was assessed. The biocomposite demonstrated upgraded swelling and anti- bacterial activity. Biocompatibility studies were carried out using osteoblast cells and thus we proved the non-toxic nature of the biocomposite.. Osteoblast cell adhesion investigations demonstrated...
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Abstract: Titanium(II) complexes of composition TiCl 2 (L) 2 [where L = 2,2’-bipyridine (bipy), 4,4’-dimethyl-2,2’- bipyridine (bpMe), 4,4’-dimethoxy-2,2’-bipyridine (bpoMe), 6,6’-dimethyl-2,2’-bipyridine (dpMe), adamantylamine (ada)]. The complexes synthesized were characterized by different spectroscopic techniques, viz. The stoichiometry of the complexes was established by their elemental analysis (chlorine and ti- tanium estimation). Antibacterial screening of the ligands as well as the complexes was...
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The 13 C NMR spectra of these compounds revealed essentially the appearance of the signals of C 4 and C 6 carbons at δ and ppm, respectively. Moreover, we note the disappearance of the signal due to the carbon of the –CN function.. In the case of the use of the maleic and succinic anhydrides in the same conditions the...
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Synthesis of 3-(9-hydroxy-3-methoxy-7-aryl-6,7,9,10-tetrahydro-5H -benzo[ h] thiazolo[2,3-b ]quinazolin-9- yl)-2H -chromen-2-ones.. Antibacterial activity. δ m, 1H), 2.09 (t, 1H, J = 7.2 Hz), 2.53 (t, 1H, J = 6.8 Hz m, 1H), 3.51 (d, 1H, J = 12.8 Hz), 3.77 (s, 3H), 4.10 (d, 1H, J s, 1H m, 6H), 7.15 (d, 1H, J. 8.4 Hz m, 2H m, 2H m, 1H),...
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doi:10.3906/kim-1502-82 h t t p. New antimicrobial biscembrane hydrocarbon and cembranoid diterpenes from the soft coral Sarcophyton trocheliophorum. 1 Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia. 2 Department of Pharmacy, Faculty of Science, Tadulako University, Palu, Indonesia. 3 Department of Marine Chemistry, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia. 4 Department of...
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Cancer is one of the major health problems in the world.. Oximes 2a–2d, O − methyl oxime ethers 3a–3d, and O -benzyl oxime ethers 4a–4d were synthesized in high yields by utilizing positional isomers of and 13-keto tetradecanoic acid methyl esters in which the keto group is at the beginning, in the middle, and at the end of the fourteen-carbon...
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Inclusion complexes of CD-AN. Although the inclusion complexes have many applications, their shortcomings are worth considering. Cui et al. [51] applied ultrasound to prepare cumin essential oil with CD to form inclusion complexes. These monoterpenes after forming inclusion complexes exhibited antimicrobial activity against S.. After resveratrol formed inclusion complexes with CD, the results displayed that the corresponding inclusion complex was...
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These R groups in the POSS structure may be amine, halogen, mercapto, glycidyl, vinyl functional alkyl, alkylene or aromatic groups, or only hydrogen atoms [3–11]. POSS structures can easily be functionalized by attaching different groups to the eight corners of the cubic structure of POSS [12,13]. In this study, POSS-based film coating material was synthesized by the sol-gel method. Chemicals...
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In the coordinated state the intramolecular hydrogen bonds between the oxime anions can be replaced with boron compounds (BF 2. In the literature, are described the vicinal dioximes containing either aliphatic or aromatic amines [28–34], for which creation the dichloroglyoxime (DClH 2 ) can be used as a precursor. One of the reported vic-dioximes, bis(di-p-aminotoluene)glyoxime mono-p-aminotoluene trihydrate showed good to...
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Molecular Identification of Streptomyces producing antibiotics and their antimicrobial activities. The isolates varied morphologically on the basis of spore color, aerial and substrate mycelium formation, and production of diffusible pigment. Isolates were tested under a microscope by using slide culture technique. The results indicate that the soil of this region is source of Streptomyces having antibacterial and antifungal activity and...