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    Wyświetlanie 1-7 z 7
    Tytuł:
    Biological characteristics of a new antibacterial peptide and its antibacterial mechanisms against Gram-negative bacteria
    Autorzy:
    Pei, Z.
    Ying, X.
    Tang, Y.
    Liu, L.
    Zhang, H.
    Liu, S.
    Zhang, D.
    Wang, K.
    Kong, L.
    Gao, Y.
    Ma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087656.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    antimicrobial peptide
    biological characteristics
    antibacterial mechanism
    Gram-negative bacteria
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 533-542
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization and antimicrobial activity of some new dihydropyrano[c]chromenes
    Autorzy:
    Bhalu, A.
    Moteriya, P.
    Chanda, S.
    Baluja, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412452.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dihydropyrano[c]chromenes
    antibacterial activity
    Gram positive bacteria
    Gram negative bacteria
    N,N-Dimethylformamide
    Opis:
    Some new dihydropyrano[c]chromenes derivatives are synthesized from 4-hydroxycoumarin. The structure of newly synthesized compounds was confirmed by mass, 1H NMR and IR spectroscopy. Further, antimicrobial screening of these synthesized compounds was done against some bacterial (Gram positive as well as Gram negative) and fungal strains in N,N-dimethylformamide. It is observed that some of synthesized compounds exhibited significant antibacterial activity against Gram positive bacterial strains. The selected fungal strains were most resistant for the studied compounds as none of the synthesized compounds showed activity against any of the fungal strain studied. The best antibacterial activity was shown by ABR-10.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 12; 1-6
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization and antimicrobial activity of pyrazolo chalcone compounds
    Autorzy:
    Hirapara, Asmita V.
    Baluja, Shipra H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076569.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dimethyl sulphoxide
    Fungai
    Gram negative bacteria
    Gram positive bacteria
    N
    N-dimethyl formamide
    Pyrazolo chalcone compounds
    Opis:
    Some new pyrazolo chalcone compounds were synthesized and their structure characterization was done by spectroscopic techniques such as FT-IR, 1H NMR and mass. Screenings of all these synthesized compounds were done in vitro against some bacterial and fungal strains in dimethyl sulphoxide and N,N-dimethyl formamide using agar well diffusion method. It is observed that N,N-dimethyl formamide is good solvent for these compounds in selected strains.
    Źródło:
    World Scientific News; 2019, 115; 242-259
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antimicrobial activity of some novel triazolo quinoline derivatives
    Autorzy:
    Hirapara, Asmita V.
    Baluja, Shipra H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076047.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dimethyl sulphoxide
    Fungal strains
    Gram negative bacteria
    Gram positive bacteria
    N
    N-dimethyl formamide
    Triazolo quinoline derivatives
    Opis:
    Some triazolo quinoline derivatives were synthesized and their structures were confirmed by IR, 1H NMR, 13C NMR and mass spectroscopy. Screening of all these synthesized compounds were done in vitro against bacteria and three fungal strains in dimethyl sulphoxide and N, N-dimethyl formamide. It is observed that N, N-dimethyl formamide is good solvent for these compounds in selected strains.
    Źródło:
    World Scientific News; 2019, 117; 102-121
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Białka uczestniczące w transporcie jonów żelaza(II) w bakteriach gram-ujemnych
    Proteins involved in the ferrous ions transport in gram-negative bacteria
    Autorzy:
    Kierpiec, Karolina
    Stokowa-Sołtys, Kamila
    Powiązania:
    https://bibliotekanauki.pl/articles/1413209.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    transport jonów żelaza(II)
    bakterie gram-ujemne
    Feo
    ferrous iron transport
    Hmu
    hemin uptake protein
    ferrous ions transport
    gram-negative bacteria
    Opis:
    Continuous increase in the number of multidrug-resistant strains forces us to look for drugs with completely new mode of action. One of the bacterial property determining the pathogenicity of these microorganisms is their ability to obtain iron. Because in the living environment of these single-celled individuals, its concentration is much lower than this necessary for their growth. For this reason, bacteria created various type of iron aquisition systems, including the Feo system, which mechanism of Fe2+ ion uptake is not fully understood, and protein from the Hmu family belonging to ABC transporters. The Feo transport system is one of the most common systems that is exclusively responsible for importing Fe2+ ions. It consists of three proteins: FeoA, FeoB and FeoC. FeoB is a transmembrane protein that is believed to play a key role in the mechanism of Fe2+ ion uptake. The other two components are cytoplasmic proteins. Both, FeoA and FeoC, are cytoplasmic proteins resembling the construction of transcription regulators. ABC transporters play an equally important role in maintaining iron homeostasis. These include proteins from Hmu family. HmuUV complex catalyses the import of these ions in hem iron form. The structure of this complex consists of TMD dimer (HmuU) and NBD dimer (HmuV). The HmuU is considered to be a permease - just like the FeoB described earlier while HmuV is the ATP binding protein.
    Źródło:
    Wiadomości Chemiczne; 2021, 75, 3-4; 375-394
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular basis of quorum sensing signal-response systems in bacteria
    Autorzy:
    Ziemichód, Alicja
    Skotarczak, Bogumiła
    Powiązania:
    https://bibliotekanauki.pl/articles/1386055.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    autoinducers 2 and 3
    QS phenomenon
    quinolone signal molecules
    signal molecules of Grampositive and Gram-negative bacteria
    autoinduktory 2 i 3
    chinolonowe cząsteczki sygnałowe
    cząsteczki sygnałowe bakterii Gramdodatnich i Gram-ujemnych
    zjawisko QS
    Opis:
    Bacteria use quorum sensing (QS) to conduct gene expression programmes connected with collective behaviors. QS indicates on the capacity of bacteria to monitor their population density and regulate gene expression. QS activates from tens to hundreds of genes that underlie different biological processes. The QS-regulated processes organize horizontal gene transfer, the formation of biofilms, multicellular behaviors, microbe–host and microbe–microbe relations. The QS signaling requires the production, release, detection, exchange and perception of bacterial compounds, known as autoinducers or QS signals. Recently, new autoinducers have been discovered in bacteria and it has been shown how these molecules are recognized by the respective receptors. Autoinducers belong to three major classes: acyl-homoserine lactones (AHLs) used by Gram-negative bacteria, specific oligopeptides used by Gram-positive bacteria and universal autoinducers. The aim of this paper is to provide an overview of molecular basis of the QS phenomenon, characterization of intra- and interspecies QS signaling molecules and biological processes regulated by these molecules.
    Bakterie używają quorum sensing (QS) do przeprowadzania programów ekspresji genów związanych z zachowaniami grupowymi. QS oznacza zdolność bakterii do monitorowania gęstości swojej populacji i regulacji ekspresji genów. QS aktywuje od dziesiątek do setek genów, które są związane z różnymi procesami biologicznymi. Procesy regulowane przez QS są związane z horyzontalnym przepływem genów, tworzeniem biofilmów, zachowań wielokomórkowych, oraz relacji bakteria–żywiciel i bakteria–bakteria. Sygnalizacja QS wymaga wytwarzania, uwalniania, wykrywania, wymiany i percepcji komponentów nazywanych autoinduktorami lub sygnałami QS. Ostatnio u bakterii zostały odkryte nowe autoinduktory oraz wykazano jak te cząsteczki są rozpoznawane przez odpowiednie receptory. Autoinduktory należą do trzech głównych klas: do acylowanych laktonów homoseryny (AHLs) używanych przez bakterie Gram-ujemne, specyficznych oligopeptydów używanych przez bakterie Gram dodatnie i do autoinduktorów uniwersalnych. Celem artykułu jest przegląd bazy molekularnej zjawiska QS, w tym wewnątrz i międzygatunkowych cząsteczek sygnałowych QS oraz procesów biologicznych regulowanych przez te cząsteczki
    Źródło:
    Acta Biologica; 2017, 24; 133-140
    2450-8330
    2353-3013
    Pojawia się w:
    Acta Biologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficacy of a novel biofilter in hatchery sanitation: I. Removal of airborne bacteria, dust and endotoxin
    Autorzy:
    Chmielowiec-Korzeniowska, A
    Tymczyna, L.
    Skorska, C.
    Sitkowska, J.
    Cholewa, G.
    Dutkiewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/51220.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    prevention
    animal breeding
    organic dust
    dust
    Enterococcus faecalis
    biofilter
    mesophilic bacteria
    endotoxin
    Gram-negative bacterium
    hygiene
    bioaerosol emission
    airborne bacteria
    hatchery
    bacteria
    animal hygiene
    Opis:
    A novel biofi lter containing organic, bentonite and halloysite media was applied for elimination of microbial pollutants from the air of an industrial hatchery. The concentrations of total mesophilic bacteria, Gram-negative bacteria, thermophilic actinomycetes, dust and bacterial endotoxin were determined in the air of hatchery during 2 months before installation of the biofi lter, and during 6 months after installation of the biofi lter, at the inlet and outlet ducts from each medium. Before installation of the biofi lter, the concentrations of total mesophilic bacteria, Gram-negative bacteria, thermophilic actinomycetes, dust and endotoxin in the air were within the ranges of 0.97- 131.2 × 103 cfu/m3, 0.0-34.4 × 103 cfu/m3, 0.0-0.02 × 103 cfu/m3, 0.37-4.53 mg/m3, and 50.9-520,450.4 ng/m3, respectively. Enterococcus faecalis and Gram-negative bacteria (Acinetobacter spp., Escherichia coli, Enterobacter cloacae, and other species) prevailed among bacterial species recovered from the air of the hatchery. A total of 56 species or genera of bacteria were identifi ed in the air samples taken in the examined hatchery; of these, 11, 11 and 6 species or genera respectively were reported as having allergenic, immunotoxic and/or infectious properties The concentrations of total mesophilic bacteria, Gram-negative bacteria, Enterococcus faecalis and endotoxin found at the inlet duct of the biofi lter after its installation were signifi cantly smaller compared to those recorded before its installation (p<0.05). The concentrations of Gram-negative bacteria, Enterococcus faecalis and dust found at the outlet ducts of biofi lter after its installation were signifi cantly smaller compared to those recorded at the inlet duct of the biofi lter (p<0.01). The concentrations of total meso-philic bacteria were also smaller at the outlet ducts of the biofi lter compared to that at the inlet duct; however, the difference was not signifi cant because of the massive growth of Streptomyces species in the biofi lter’s media which contaminated the outcoming air. In conclusion, the applied biofi lter proved to be effective in the elimination of potentially pathogenic bacteria, dust and endotoxin from the air of the hatchery. The effi cacy of the biofi lter could be improved by the inhibition of the Streptomyces growth in the media of the biofi lter.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2007, 14, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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