scholarly journals Synthesis and antimicrobial activity of new crown ethers of Schiff base type

2007 ◽  
Vol 72 (3) ◽  
pp. 215-224 ◽  
Author(s):  
Mustafa Yildiz ◽  
Aşkin Kĺraz ◽  
Başaran Dülger
Keyword(s):  
Escherichia Coli ◽  
Schiff Base ◽  
Mycobacterium Smegmatis ◽  
Spectroscopic Data ◽  
Micrococcus Luteus ◽  
Debaryomyces Hansenii ◽  
Proteus Vulgaris ◽  
Kluyveromyces Fragilis ◽  
Uv Visible

New crown ether ligands of the Schiff base type (4a-d) were synthesized by the reaction of 2-hydroxybenzaldehyde, 3-hydroxybenzaldehyde, 4-hydroxybenzaldehyde and 2-hydroxy-1-naphthaldehyde with 6,7-dihydro-13H-dibenzo [e,h] [1,4]dioxonin-2,11-diamine (3). The structures of ligands were investigated by elemental analysis as well as IR, UV-visible, 1H-NMR, 13C-NMR and MS spectroscopic data. The antimicrobial and anti-yeast activities of the ligands were screened in vitro against the organisms Escherichia coli ATCC 11230, Staphylococcus aureus ATCC 6538, Klebsiella pneumoniae UC57, Micrococcus luteus La 2971, Proteus vulgaris ATCC 8427, Pseudomonas aeruginosa ATCC 27853, Mycobacterium smegmatis CCM 2067, Bacillus cereus ATCC 7064, Listeria monocytogenes ATCC 15313, Candida albicans ATCC 10231, Kluyveromyces fragilis NRRL 2415, Rhodotorula rubra DSM 70403, Debaryomyces hansenii DSM 70238 and Hanseniaspora guilliermondii DSM 3432.

scholarly journals Synthesis, characterization and antibacterial studies of Mn(II) and Co(II) complexes of an ionic liquid tagged Schiff base

2016 ◽  
Vol 81 (10) ◽  
pp. 1151-1159 ◽  
Author(s):  
Sanjoy Saha ◽  
Ananya Das ◽  
Kaushik Acharjee ◽  
Biswajit Sinha
Keyword(s):  
Escherichia Coli ◽  
Ionic Liquid ◽  
Schiff Base ◽  
Antibacterial Activities ◽  
Spectroscopic Methods ◽  
Tetrahedral Geometry ◽  
Antibacterial Studies ◽  
Ft Ir ◽  
Uv Visible

Mn(II) and Co(II) complexes of an ionic liquid-based Schiff base, 1-{2-(2-hydroxybenzylideneamino)ethyl}-3-methylimidazolium bromide, were synthesized and characterized by various analytical and spectroscopic methods such as elemental analysis, UV-Visible, FT-IR, 1H NMR, ESI-MS and magnetic susceptibility measurement. These studies indicated tetrahedral geometry for the complexes. The Schiff base ligand and its complexes were tested for in vitro antibacterial activities to assess their inhibiting potentials against Escherichia coli and Lactobacillus sp.

scholarly journals Synthesis, Characterisation, Antimicrobial activity and DNA Cleavage of (E)-2-((Tetrazolo[1,5-A]Quinolin-4- ylmethylene)Amino)Phenol Schiff base Metal complexes

2020 ◽  
Vol 13 (2) ◽  
pp. 29-37
Author(s):  
Anilkumar Ambala ◽  
Ch. Abraham Lincoln
Keyword(s):  
Antimicrobial Activity ◽  
Schiff Base ◽  
Metal Complexes ◽  
Dna Cleavage ◽  
Analytical Data ◽  
Amino Phenol ◽  
Ft Ir ◽  
Uv Visible ◽  
Schiff Base Metal Complexes

A series of novel (E)-2-((Tetrazolo[1,5-a]quinolin-4-ylmethylene)amino)phenol Cu(II), Co(II), Ni(II), Zn(II) and Mn (II) metal complexes have been synthesized 1:1 metal to ligand ratio, and these complexes were characterized by using analytical data such as FT-IR, UV-visible, Mass spectroscopy, SEM, EDX, TGA and magnetic moment measurements. The ligand and all the metal complexes were tested in vitro antimicrobial activity and DNA cleavage studies.

scholarly journals Atividade antimicrobiana dos extratos metanólicos de diferentes espécies do gênero Lippia

2021 ◽  
Vol 10 (9) ◽  
pp. e22610918051
Author(s):  
Soraya Castro Trindade ◽  
Jurandi Nery Pereira-Filho ◽  
Laerte Oliveira Barreto Neto ◽  
Thais Brito de Oliveira Moura ◽  
Antonio Pedro Fróes de Farias ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Bacillus Subtilis ◽  
Candida Albicans ◽  
Candida Glabrata ◽  
Micrococcus Luteus ◽  
Salmonella Choleraesuis

As espécies do gênero Lippia (Verbenaceae) possuem diversas moléculas bioativas, oriundas do seu metabolismo secundário, que apresentam atividade antimicrobiana, analgésica, antifúngica e imunomoduladora. Este estudo teve como objetivo avaliar a atividade antimicrobiana in vitro do extrato metanólico das folhas de L. alnifolia, L. origanoides, L. insignis e L. thymoides frente a microrganismos de importância clínica.  Foi realizada uma triagem fitoquímica dos extratos das plantas e a avaliação da atividade antimicrobiana pelo método de difusão em disco, além da determinação da concentração inibitória mínima (MIC) frente às bactérias Bacillus subtilis, Escherichia coli, Micrococcus luteus, Pseudomonas aeruginosa, Staphylococcus aureus e Salmonella choleraesuis, e os fungos Candida albicans e Candida glabrata. A presença de saponinas, terpenos, esteroides, cumarinas, ácidos fenólicos e flavonoides foi observada na análise fitoquímica. Os extratos metanólicos das folhas de L. alnifolia, L. origanoides e L. insignis apresentaram atividade antimicrobiana contra todas os microrganismos testados. O extrato metanólico da L. thymoides apresentou atividade antimicrobiana frente aos microrganismos M. luteus, P. aeruginosa, S. aureus, C. albicans e C. glabrata. A maioria dos extratos apresentou atividade bacteriostática e todos os extratos apresentaram atividade fungistática para C. albicans e fungicida para C. glabrata. A utilização dos extratos de Lippia pode ser uma alternativa viável no tratamento de doenças infecciosas de origem bacteriana e fúngica.

scholarly journals Antimicrobial Activity of Selenium Nanoparticles Synthesized by Actinomycetes Isolated from Lombok Island Soil Samples

2018 ◽  
Vol 20 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Shanti Ratnakomala ◽  
Nurul Fitri Sari ◽  
Fahrurrozi Fahrurrozi ◽  
Puspita Lisdiyanti
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Bacillus Subtilis ◽  
Micrococcus Luteus ◽  
Selenium Nanoparticles ◽  
Selenium Nanoparticle ◽  
Soil Actinomycetes ◽  
Uv Visible ◽  
Lombok Island

AbstractA total of 98 actinomycetes were isolated from the soil and litter samples collected from the cacao and coffee plantation in Lombok Island, West Nusa Tenggara, Indonesia. These isolates were screened for their antimicrobial activity. Among 98 isolated strains, only 24 isolates showed antimicrobial activity against test microorganisms of which 20.4% were active against Bacillus subtilis BTCC B-612, 14.3% against Staphylococcus aureus BTCC B-611, and 5.1% against Escherichia coli BTCC B-609. Out of these 24 isolates, 3 were found to be able to grow in medium containing 3 mM Selenium oxide of which the culture were changed color to red. Two of the best strains, L-155 and L-156, were selected for assessing production of Selenium nanoparticles. Bioreduction of selenium nanoparticles was confirmed by UV–visible spectrophotometer which showed peak between 300 and 320 nm. Biosynthesized selenium nanoparticle from isolate actinomycetes L-155 and L-156 were found to have a broad spectrum of activity against the tested microorganisms: Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Micrococcus luteus, and Candida albicans. This study showed rapid and eco-friendly synthesis of selenium nanoparticles from soil actinomycetes. Most of these active isolates revealed to possess antibacterial property.

scholarly journals Bacteriological Analysis of Beef Production Chain in Birnin Kebbi Metropolis of Kebbi State, Nigeria

2020 ◽  
pp. 64-76
Author(s):  
Famubo, Joseph A. ◽  
Isiaka, Aishatu ◽  
Abbas, Yusuf B.
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Streptococcus Pyogenes ◽  
Micrococcus Luteus ◽  
Klebsiella Pneumonia ◽  
Proteus Vulgaris ◽  
Production Chain ◽  
Retail Outlets ◽  
Retail Meat

The hygiene status of most abattoirs and retail outlets in Nigeria is very poor, and it contributes to the unacceptable level of bacteria load in beef, and poses a health risk to consumers. This study examined the bacteriological analysis of beef production chain in Birnin Kebbi metropolis. A total of 100 samples of meat, water and surface swab in Main Market, GRA, Badariya, Bayan Kara and Rafin Atiku, Birnin Kebbi Central abattoir and retail meat shops were collected aseptically, processed and analyzed. Meat from retail outlets were mostly contaminated by Staphylococcus aureus (24.4%), followed by Escherichia coli (17.3%), Klebsiella pneumonia (9.8%), Salmonella typhimurium (9.1%), Entrobater aerogenes (8.5%), Streptococcus pyogenes (8.1%), Proteus vulgaris (7.8%), Micrococcus luteus (7.8%) and Pseudomonas aeruginosa (7.2%). In the abattoirs contact surfaces, contamination occurred mostly by Staphylococcus aureus (23.4%), Salmonella typhimurium (18.2%), Escherichia coli (16.9%), Entrobater aerogenes (9.1%), Streptococcus pyogenes (7.8%), Klebsiella pneumonia, Proteus vulgaris, and Pseudomonas aeruginosa (6.5% each) and Micrococcus luteus (5.2%). The findings revealed a high bacterial load in both abattoir and retail meat outlets. In order to safeguard the health of the public against the risks of food borne infections, there is a need to educate and advocate good sanitation and meat handling practices in the abattoir and beef retail outlets.

scholarly journals IN VITRO EVALUATION OF ANTIMICROBIAL ACTIVITY OF MICRO PROPAGATED CALLUS OF CURUULIGO ORCHIODES (BLACK MUSILLI) AGAR WELL DIFFUSION AND MINIMUM INHIBITORY CONCENTRATION (MIC)

2017 ◽  
Vol 9 (3) ◽  
pp. 75
Author(s):  
Rajanikanth Garapati ◽  
N. Ramesh
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Candida Albicans ◽  
Bacillus Cereus ◽  
Proteus Vulgaris ◽  
Methanol Extracts ◽  
Tract Infections

Objective: In vitro investigated the potential of methanol extracts of micro-propagated C. orchiodes in the antimicrobial property against the three gram-negative bacteria, two gram-positive and one fungal filament.Methods: The micro propagated callus methanol extract was examined against Escherichia coli, Proteus vulgaris, Salmonella typhimurium, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus and Candida albicans. The zone of inhibitions are determined at 10 mg/ml concentration of methanol extracts of callus on agar well plate and MIC against tested microorganism.Results: The highest antibacterial activity recorded in Staphylococcus aureus Bacillus cereus and followed by Candida albicans. Antibacterial activity of leaf extracts of A. reticulata was also significant against the tested microorganisms Escherichia coli, Salmonella typhi, Proteus vulgaris, Pseudomonas aeruginosa compared to ciprofloxacin.Conclusion: Based on the above observations, these extracts were further evaluated for their effect on microorganisms causing infections like typhoid fever, urinary tract infections, septicemia, toxic shock syndrome, skin infection, nosocomial infection, arthritis and diarrhoea. The results also suggest that these plants serve a therapeutic purpose in the treatment bacterial infections.

scholarly journals Synthesis and biological evaluation of 5-substituted derivatives of benzimidazole

2014 ◽  
Vol 79 (3) ◽  
pp. 277-282
Author(s):  
Vesna Vasic ◽  
Jelena Penjisevic ◽  
Irena Novakovic ◽  
Vladimir Sukalovic ◽  
Deana Andric ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antifungal Activity ◽  
Salmonella Enteritidis ◽  
Biological Evaluation ◽  
Proteus Vulgaris ◽  
Clostridium Sporogenes ◽  
In Vitro Antibacterial Activity ◽  
Synthesis And Biological Evaluation ◽  
Derivatives Of

Series of eight novel 5-substituted derivatives of benzimidazole were synthesized by condensation of corresponding diamine with ethyl-4-[4-(2-chlorophenyl)piperazin-1-yl] butanoate in refluxing 4N hydrochloric acid. In vitro antibacterial activity against ten strains namely, Bacillus subtilis, Clostridium sporogenes, Streptosporangium longisporum, Micrococcus flavus, Sarcina lutea, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Salmonella enteritidis and Proteus vulgaris and antifungal activity against two fungal strains namely, Candida albicans and Saccharomyces cerevisiae, were evaluated. Of all the compounds screened for activity 2-{3-[4-(2-chlorophenyl)piperazin-1-yl]propyl}-5-iodo-1H-benzimidazole and 2-{3-[4-(2-chlorophenyl)piperazin-1-yl]propyl}-5-methyl-1H-benzimidazole were associated with higher antifungal activity than commercial drugs.

scholarly journals Paralemnolins X and Y, New Antimicrobial Sesquiterpenoids from the Soft Coral Paralemnalia thyrsoide

Antibiotics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1158
Author(s):  
Abdelsamed I. Elshamy ◽  
Tarik A. Mohamed ◽  
Eman M. Elkady ◽  
Ibrahim A. Saleh ◽  
Ahmed A. El-Beih ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Aspergillus Niger ◽  
Spectroscopic Data ◽  
Soft Coral ◽  
2D Nmr ◽  
Organic Extracts

The organic extracts of the Red Sea soft coral Paralemnalia thyrsoides has led to the identification of two neolemnane-type sesquiterpenoids: paralemnolins X and Y (1, 2). In addition to these newly characterized compounds, ten known metabolites (3–12) were isolated. Previously reported compounds were elucidated by literature comparison of spectroscopic data (1D and 2D NMR as well as MS data). In vitro antimicrobial activity was investigated for compounds (1–12) against Staphylococcus aureus, Escherichia coli, Candida albicans and Aspergillus niger. Compound 5 showed antimicrobial activity against all assayed microorganisms.

scholarly journals Copper(II) complexes of substituted salicylaldimines with benzimidazole nucleus: synthesis, characterization and antimicrobial activity

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Abdullahi Sobola ◽  
Gary Watkins
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Schiff Base ◽  
Candida Albicans ◽  
Molar Conductivity ◽  
Conductivity Data ◽  
Low Activity ◽  
Broth Dilution

The aim of this study was to synthesize and evaluate the antimicrobial activity of Cu(II) complexes of some substituted salicylaldimines with benzimidazole nucleus. The salicylaldimine ligands were prepared by condensing 2-aminobenzimidazole with salicylaldehyde, o-vanillin and p-vanillin. All the compounds and the Cu(II) complexes were characterized by elemental , electronic, infrared and molar conductivity data. In addition, the structures of the ligands were confirmed with 1H-NMR and 13C-NMR spectral data. Both the ligands and the Cu(II) complexes have been screened for their in vitro antimicrobial activity against Staphylococcus aureus subsp. aureus ATCC® 6538™, Bacillus substillis subsp. spizizenii ATCC® 6633™*, Escherichia coli ATCC® 8739™* and Candida albicans ATCC® 2091™* using agar diffusion and broth dilution techniques. The ligands coordinated to the Cu(II) ion in a 1:2 (M:L) ratio as tridentate monobasic species via the imine-N, the imidazole-N and the phenolic–O to give six-coordinated Cu(II) complexes. The free ligands exhibited varying antimicrobial activity on the tested organisms from low activity to significant potency. Candida albicans was specifically susceptible to the o-vanillin Schiff base ligand. The presence of Cu(II) ion, however, did not have a regular effect on the activity of the compounds.

ESTUDOS DA ATIVIDADE ANTIMICROBIANA DA ESPÉCIE Plantago major L.: UMA REVISÃO INTEGRATIVA

2021 ◽  
Author(s):  
Auygna Pamyda Gomes da Silva ◽  
Abigail Eduarda de Miranda Magalhães ◽  
Maria Amélia Paiva Ferruccio ◽  
Tayonara dos Santos Melo ◽  
Tuanne dos Santos Melo
Keyword(s):  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Candida Albicans ◽  
Porphyromonas Gingivalis ◽  
Micrococcus Luteus ◽  
Penicillium Digitatum ◽  
Plantago Major ◽  
Pseudomonas Tolaasii

Introdução: A Plantago major L. é popularmente conhecida como tanchagem pertence à família Plantaginacea. Tem estrutura perene com folhas rosetadas, as flores e folhas jovens são comestíveis. Utilizada na medicina popular para o tratamento de lesões na pele, gengivite, abcessos, dor de dente. Possui grande variedade de bioativos como alcalóides, terpenos, flavonóides, vitaminas. A sua atividade funcional é relacionada a presença desses compostos químicos.(1) Objetivos: Realizar um levantamento bibliográfico para identificar a atividade antimicrobiana de P. major. Métodos: Trata-se de uma revisão bibliográfica do tipo integrativa realizada por busca nas bases de dados Pubmed, SciELO e BVS, trabalhos indexados no período de 2016 a 2021. Foram utilizados para busca dos artigos os seguintes descritores “Plantago major” e “antimicrobial”. Como critério de inclusão foram pesquisados artigos em inglês, espanhol e português, disponíveis na íntegra, estudos com informações referentes ao uso da espécie como agente antimicrobiano. Os critérios de exclusão foram os artigos duplicados, revisões bibliográficas. Resultados: Foram encontrados 18 artigos, após realizar uma análise criteriosa do material, foram incluídos na revisão 6 trabalhos. Um dos trabalhos sugeriu a utilização de extrato de P. major como enxaguante bucal para o tratamento de mucosite oral.(2) Em outro estudo a aplicação do extrato de P. major mostrou atividade antibacteriana contra Pseudomonas tolaasii, resultando um maior diâmetro inibitório. Também apresentou inibição de crescimento contra Pseudomonas aeruginosa utilizando a técnica de disco, com o aparecimento de halos de inibição de crescimento maiores que 1 cm. No ensaio de citotoxicidade, o grau de hemólise foi classificado como baixo (5%), logo, indicando a segurança no uso da tanchagem(3) Utilizando sementes de P. major aplicadas em nanoparticulas apresentou atividade aceitável contra Micrococcus luteus, Escherichia coli e Penicillium digitatum. Além desses patógenos, outro estudo evidenciou que o extrato etanólico (75%;100%) de tanchagem apresentou efeito antibacteriano in vitro contra Porphyromonas gingivalis, apresentando halos de inibição.(4) Também foi obtido resultados contra Cândida albicans, aplicando extrato de P. major, com aucubina e baicaleína, atuando na hidrofobicidade de C. albicans, demonstrando eficácia como antifúngico, sugerindo ser um potencial promissor para infecções relacionadas ao biofilme por C. Albicans.(5) Conclusões: A partir desses resultados é possível identificar a possibilidade do uso de Plantago major para fins terapêuticos, fitoterápicos ou nutricionais sendo necessário realizar mais estudos quanto a sua atividade antimicrobiana além de testes quanto à sua toxicidade.

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