Có 20+ tài liệu thuộc chủ đề "Antimicrobial activity"
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Cycloartane- type triterpenes and alkyl phenols were isolated from the propolis of the stingless bees Trigona minor and Lisotrigona cacciae [2-4] while xanthones and homoisoflavonoids were found from the Lisotrigona sp. Herein, four compounds were isolated from the propolis of the stingless bee Lisotrigona cacciae in the Hoa Binh province and were identified as cycloartenol (1), cochinchinone A (2), α-mangostin...
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8.4 Hz, 3 J F H 8.8 Hz, H 2 ,H 6. 7.40 (dd, 2H, 3 J HH 8.4 Hz, 4 J F H 5.6 Hz, H 3 ,H 5. 130.10 (d, 3 J F C = 8.5 Hz, C 3, C 5. 65.84 (d, 2 J P C = 6.8 Hz, O-C H 2. 26.60 (d, 3 J P...
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Abstract: A series of new extensively conjugated E -stilbene azomethines (5a–5h) were synthesized and screened for their antioxidant and antimicrobial activity. Additionally, compounds 5a–5h were also evaluated for antioxidant potential using DPPH free radical scavenging and ferric thiocyanate (FTC) assays. The structure elucidation of the synthesized compounds was carried out by UV-Vis, FT-IR, 1 H NMR, 13 C NMR, and...
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The absolute configuration of compound 14 was found as SR in the solid state.. Analytical and spectroscopic data of the phosphazenes were consistent with their suggested structures. Antimicrobial activities of the benzyl-pendant-armed cyclotriphosphazenes were scrutinized against G. Minimum inhibitory concentrations and minimal bacterial concentrations were in the range of 125–500 µ M. The phosphazene- DNA interaction studies of the cyclotriphosphazenes...
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doi:10.3906/kim-1911-61 h t t p. All of the synthesized compound exhibited different degrees of antimicrobial activity at concentrations between 20–100 µg/disc against the test organisms.. The first isolation of alnustone was performed from Alnus pendula by Suga et al. (2), a natural diarylheptanoid, was first isolated from Cur- cuma xanthorrhiza by Claeson et al. Jurgens et al. The following isolation...
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doi:10.3906/kim-2005-38. The genus Geranium is taxonomically classified in the Geraniaceae family, which contains a total of 840 species. This genus is the largest in the Geraniaceae family. Numerous studies have been conducted on the chemical contents of the subspecies of the genus Geranium. Many articles have been published recently on the biological effects of extracts and essential oils of the...
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doi:10.3906/kim-2010-5. Pyrazoles are aromatic ring organic compounds of the heterocyclic series with a 5-membered ring structure having three carbon and two nitrogen atoms [1–3]. In accordance with the nature of the 1,3-diketones, undesirable isomers may be formed in such reactions [16]. Although the conditions in the N-arylation of the heterocyclic ligands using the Pd catalyst were mild [18], significant progress...
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Enterococci are commensal inhabitants of the animal gastrointestinal tracts that commonly isolated from different environmental habitats such as animal and human feces, soil, plants, and water (Byappanahalli et al., 2012). Recently, they are of increasing interest due to their potential techno-functional roles such as their roles in the preparation of different types of cheeses and the development of their sensory...
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Their role is to improve shelf life and flavor of the fermented food products (Perez et al., 2014). Probiotics are added to starter culture for large-scale production of daily products as a functional supplement for improving gut health, antimicrobial activity and reducing lactose intolerance (Perez et al., 2014;. Epithelial attachment is a probiotic characteristic that allows them to colonize the...
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Acid solutions such as hydrogen chloride and sulfuric acids are extensively used in pickling processes of metals which are companioned by significant dissolution of the metals (Hussin et al., 2016. Khadraoui et al.,2013). (Chauhan et al., 2007. Khadraoui et al., 2013. Ating et al., 2010. Hachelef et al., 2016).. agent (Jouad et al., 2001. Mohamedet al.,2010). The chemical composition and...
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Amarowicz and Pegg, 2019) and are of interest to many scientific studies addressing the potential positive effects on the overall health status (Kiokias et al., 2020. Manuelian et al., 2021), reproduction potential (Zhong and Zhou, 2013;. Tvrdá et al., 2016. Vizzari et al., 2021) or endocrine system (Golbidi and Laher, 2010. Jambor et al., 2021).. These are mainly antioxidative, anti-inflammatory,...
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1 H NMR (500 MHz, DMSO-d 6 ) δ 10.44 (s, 1H, -CH O), 8.32 (d, J = 8.0 Hz, 1H, H-4), 7.77 (d, J = 8.4 Hz, 1H, H7), 7.47 (t, J = 7.7 Hz, 1H, H-6), 7.36. (t, J = 7.5 Hz, 1H, H-5), 4.59 (q, J = 7.1 Hz, 2H, -OC H 2. 4.49 (q, J =...
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Syntheses of Mannich bases 6a–c were carried out by the treatment of compound 2 with several amines in the presence of formaldehyde. It is well known that one of the main aims of therapeutic treatment is the control of serious infections, along with the prevention and treatment of some infectious complications due to other therapeutic procedures such as cancer chemotherapy...
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Abstract: 2-Methoxyethyl, 2-diethylaminoethyl, and 2-phenylethyl-substituted N -heterocyclic carbene (NHC) precur- sors were treated with Ag 2 CO 3 to yield silver(I)-NHC complexes (1a–g) in dichloromethane as a solvent at room temperature. The 7 new silver-NHC complexes were fully characterized by means of 1 H NMR, 13 C NMR, and ele- mental analysis techniques. Using the agar dilution procedure recommended by...
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1.97 (3H, d, J = 5.1 Hz, –C ≡ C–CH 3. 3.66 (1H, d, J = 8.5 Hz, –OH H, m, –OCH 2 CH 3. 13 C NMR (CDCl 3 , 100 MHz): δ 4.0 (d, J C − P = 2.7 Hz, –C ≡ C–CH 3. 71.2 (d, J C − P = 167.4 Hz, quaternary C atom), 77.5...
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k, 8a–k, and 9a–k), were synthesized from and 4-fluorophenyl)-2,3-dihydroquinolin-4(1H )-one (4, 5, and 6) by the reaction of alkyl halides under basic conditions in DMF. The new compounds 7a–k, 8a–k, and 9a–k were synthesized from flavonones 4–6, which can be considered new precursors for quinoline synthesis through a one-step reaction. All the target compounds (7a–k, 8a–k, and 9a–k) were evaluated...
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doi:10.3906/kim-1502-122 h t t p. Abstract: A series of new nickel(II) and copper(II) hydrazone complexes 1–14, containing a bidentate NO-donor hydrazone ligand, derived from 4-nitrobenzoylhydrazide and several aliphatic and aromatic aldehydes were synthesized,. The spectral data of the newly synthesized complexes show the formation of a 1:2 [metal:ligand] ratio. Key words: Hydrazone derivatives, bidentate Schiff base ligand, copper complex, nickel...
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δ (ppm m, 2H, –CH–CH 2 –CH 2 –SCH 3. 1.93 (s, 3H, –CH–CH 2 –CH 2 –SCH 3. 2.38 (s, 3H, Ar–CH 3. 3.91–3.95 (m, 1H, –CH–CH 2 –CH 2 –SCH 3. 1 H NMR, δ (ppm m, 2H, –CH–CH 2 –CH 2 –SCH 3. 1.90 (s, 3H, –CH–CH 2 –CH 2 –SCH 3. 2.11–2.32 (m, 2H, –CH–CH 2...
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1 H NMR (500 MHz, CDCl 3 )δ (ppm H, m, tetrahydronaphthalene C 6,7 –H H, m, tetrahydronaph- thalene C 5,8 –H), 3.20 (1H, dd, J = 17.5 Hz, J = 3.4 Hz, pyrazoline C 4 –H), 3.74 (1H, dd, J = 17.41 Hz, J = 11.31 Hz, pyrazoline C 4 –H), 3.88 (3H, s, OCH 3. 5.99 (1H, dd,...
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Synthesis, characterization, and antimicrobial activities of novel monosaccharide-containing Schiff base ligands. Abstract: Four new chiral Schiff base ligands (3a–4a, 3b–4b) have been prepared using aminoisopropylidene derivatives of glucose and aminochloralose derivatives of mannose. A total of eight Schiff base compounds (3a–6a, 3b–6b) were tested for antimicrobial activity against Escherichia coli ATCC 12228, Staphylococcus aureus ATCC 6538, Klebsiella pneumoniae CCM 2318,...