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Tytuł:
Biofilm formation under anaerobic conditions on biomaterial’s surface
Autorzy:
Jakubowski, W.
Biela, T.
Kamińska, M.
Walkowiak-Przybyło, M.
Walkowiak, B.
Tematy:
biofilms
surface
biomaterials
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:
https://bibliotekanauki.pl/articles/284942.pdf  Link otwiera się w nowym oknie
Opis:
Investigations of the biofilm formation processes on biomaterials surfaces are focused on typical physiologic conditions - aerobic condition. In experimental works onto model strains, and also in the clinical reports there is a lack of the information related to the mechanisms engaged in biofilm grown under conditions of limited access to oxygen or in entirely anaerobic environment. Presented results show the colonization of medical steel 316L surface and creation of biofilm structures by E. coli bacteria’s, under oxygen deficit conditions or its total lack. In studied arrangement the change of the dynamics of bacterium growth was observed, which led to considerable slowdown of the biofilm development. Bacteria were observed with use of the combination of fluorescent dyes - bis-benzimide and propidium iodide – which makes it possible the distinction of live/death bacteria. In oxygen deficiency and in anaerobic conditions multiplication of death bacteria level in comparison to standard conditions was observed (suitably 34% and 41% dead cells, oxygenic conditions - 1%). The limitation of oxygen utilization possibility by the bacteria, which colonized investigated surfaces also resulted in decreased sizes reached by the cells.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microbiology of metalworking fluids: what we know and lessons to be learnt
Autorzy:
Koch, Thomas
Tematy:
metalworking fluids
microbiology
biofilms
monitoring
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Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:
https://bibliotekanauki.pl/articles/2204631.pdf  Link otwiera się w nowym oknie
Opis:
Water-miscible metalworking fluids are an essential component of many manufacturing processes. During their lifetime they are subject to permanent changes in their physical and chemical characteristics. Due to their high content of water and their chemical composition in use, metalworking fluids (MWF) are prone to microbial life, i.e. the proliferation of bacteria and fungi. The microbial activity leads to significant changes in the chemical composition of the MWF, which can result in the loss of their technical properties. This paper briefly discusses the influences of microbial contamination on the technical quality of MWF and presents common monitoring systems for the detection of microorganisms. Finally, measures are described that can be taken to protect MWF from damage caused by high microbial loads in daily practice. In a short outlook, alternative research approaches are mentioned that aim at sustainable use of MWF.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Consequences of lysine auxotrophy for Candida albicans adherence and biofilm formation
Autorzy:
Gabriel, Iwona
Rychłowski, Michał
Tematy:
Candida albicans
biofilms
adhesion
fungi
infection
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Wydawca:
Polskie Towarzystwo Biochemiczne
Powiązania:
https://bibliotekanauki.pl/articles/1038655.pdf  Link otwiera się w nowym oknie
Opis:
A number of factors are known to be involved in Candida albicans virulence, although biofilm development on the surfaces of indwelling medical devices is considered to promote superficial or systemic disease. Based on previously reported up-regulation of saccharopine and acetyllysine in biofilm cells and activation of the lysine biosynthesis/degradation pathway, we investigated the consequences of Candida albicans lysine auxotrophy on adhesion to host tissues and biofilm formation. Our data indicate that mutant strains lysΔ21/lysΔ22, defective in homocitrate synthase, and lysΔ4, defective in homoaconitase activity (the first two α-aminoadipate pathway enzymes), are able to adhere to mouse embryonic fibroblast cells (cell line NIH/3T3) to the same extent as a control strain SC5314. On the other hand, the auxotrophic mutant strains' development on mouse fibroblast monolayers was significantly reduced up to 5 h post infection. Although invasion into human-derived oral epithelial cells was unaltered, both mutant strains formed a significantly different biofilm architecture and demonstrated diminished viability during long term biofilm propagation.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bactericidal TiO2 layers doped with Cu, Zn, and ZnO
Autorzy:
Jakubowski, W.
Frankowski, P.
Jastrzębska, A.
Celigowska, A.
Frąckiewicz, P.
Walkowiak, B.
Tematy:
chemical antimicrobial substances
bacterial biofilms
antibiotics
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Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:
https://bibliotekanauki.pl/articles/284240.pdf  Link otwiera się w nowym oknie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An overview : Fate and analysis of marine microplastics with insights into microfluidics, biofilms, and future ecological threats
Autorzy:
Ganguly, Mahima
Valiamparampil, Jithu
Somashekara, Divyashree
Mulky, Lavanya
Tematy:
pollution
microplastic
biofilms
microfluidics
sampling
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Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:
https://bibliotekanauki.pl/articles/59315743.pdf  Link otwiera się w nowym oknie
Opis:
Pollution associated with microplastics (MP) over time is becoming a genuine cause of concern because these micro-sized plastics possess the ability to accumulate toxic contaminants of diverse types. Their propensity to absorb or adsorb pollutants from the surroundings increases the toxicity of microplastics. Multiple root causes lead to the accumulation of microplastics in aqueous ecosystems, necessitating specialized techniques for investigating, handling, and disposing of them. This overview elaborates on the several modes of degradation of microplastics in aquatic systems. It further provides insights into the novel ‘Microfluidics’ technique for detecting microplastics in marine environments. Additionally, as a rising hope for the degradation of microplastics through biofilm formation, distinct types of bacteria found in marine habitats are discussed in this paper. Finally, this review elucidates the problems associated with microplastic pollution in aquatic ecosystems and explores methods for their safe disposal in the future.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prospective observational study of adenoidal biofilms in a paediatric population and its clinical implications
Autorzy:
Subtil, Joao
Bajanca-Lavado, Maria Paula
Rodrigues, Joao
Duarte, Aida
Reis, Lucia
Nogueira, Isabel
Jordao, Luisa
Tematy:
Adenoids
biofilms
scanning electron microscopy
Haemophilus
child.
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Wydawca:
Index Copernicus International
Powiązania:
https://bibliotekanauki.pl/articles/1397787.pdf  Link otwiera się w nowym oknie
Opis:
INTRODUCTION: Adenoids are nasopharyngeal lymphoid tissue with a relevant role in host defence against infection of upper respiratory tract. Nevertheless, adenoids are also a reservoir of microorganisms that can cause infections of upper respiratory tract and otitis particularly in children. OBJECTIVE: Evaluate and compare the association between biofilm assembly on adenoids and the incidence of recurrent infections in a paediatric population submitted to adenoidectomy by either infectious or non-infectious indication. METHODS: Scanning electron microscopy was used to assess biofilms on adenoid surface; biofilm assembly in vitro was monitored by crystal violet assay; antibiotic susceptibility was assessed following EUCAST guidelines; Hinfluenzae capsular typing was performed by PCR. RESULTS: Biofilms were present in 27.4% of adenoid samples and no statistical difference was found between infectious and non-infectious groups. In vitro, the most clinically relevant bacteria, H.influenzae, S.aureus, S.pyogenes, S.pneumoniae and M.catarrhalis, were mostly moderate biofilm assemblers (71.7%). 55.3% of these bacteria were intermediate/resistant to at least one of the tested antibiotics. No association was found between the ability to assemble biofilms in vitro and the presence of biofilms on adenoids nor antibiotic resistance. All H.influenzae were characterized as non-typeable. CONCLUSION: The presence of biofilms on adenoid surface was independent from clinical sample background. Bacterial ability to assemble biofilms in vitro cannot be used to predict biofilm assembly in vivo. The lack of correlation between biofilm formation and infectious respiratory diseases found contributes to question the relevance of biofilms on the pathogenesis of infectious diseases.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza warunków występowania biofilmów w systemach CIP
Conditions’ analysis of biofilms occurrence in CIP systems
Autorzy:
Piepiórka, J.
Tematy:
biofilm
systemy CIP
biofilms
CIP systems
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Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Powiązania:
https://bibliotekanauki.pl/articles/228326.pdf  Link otwiera się w nowym oknie
Opis:
Biofilmy na powierzchniach kontaktujących się z żywnością stanowią poważne zagrożenie w przemyśle spożywczym. Ich obecność przyczynia się do mikrobiologicznego zanieczyszczenia żywności oraz negatywnie wpływa na warunki pracy urządzeń. W artykule przedstawiono problem występowania biofilmów w instalacjach do mycia w systemie CIP. Zwrócono uwagę na najistotniejsze czynniki konstrukcyjne i procesowe wpływające na adhezję mikroorganizmów oraz zasady projektowania i instalowania systemów CIP w zakładach przetwórstwa spożywczego.
Biofilms on food contact surfaces make up the serious threat in the food industry. Their presence contributes to the microbiological soiling food and influences on the work of food equipment. The fight with biofilms already begin on the stage of projecting the food processing equipment and by the implementation of effective method cleaning. The article present problem of occurrence of biofilms in installations to cleaning in the CIP system. The turn attention on the construction and operating factors influencing on microorganisms adhesion and on the principle of projecting and installing the CIP system in the food department.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tolerance of Naked Amoebae to Low Oxygen Levels with an Emphasis on the Genus Acanthamoeba
Autorzy:
Cometa, Ivan
Schatz, Scott
Trzyna, Wendy
Rogerson, Andrew
Tematy:
Amoebic Keratitis, microaerophilic, naked amoebae, migration, biofilms
Pokaż więcej
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:
https://bibliotekanauki.pl/articles/763676.pdf  Link otwiera się w nowym oknie
Opis:
Amoebae feed on attached bacteria within, and below, bacterial biofilms where they experience reduced oxygen levels. The implications of this were examined by comparing the migration (an index of growth) of thirteen strains of Acanthamoeba and five species of naked amoebae grown under microaerophilic and aerobic conditions. All amoebae replicated well under both conditions and twelve isolates migrated significantly faster under low oxygen. Only one isolate, Vannella sp., migrated further (presumably grew faster) under aerobic conditions. The data show most amoebae prefer low oxygen as befits the biofilm habitat. Interestingly, the eleven acanthamoeba strains that replicated faster under microaerophilic conditions were all T4 genotypes and included four strains isolated from patients with amoeba keratitis (AK) infections. This genotype is most frequently found in AK cases and it is suggested that strains of Acanthamoeba capable of rapid growth in a biofilm of a poorly cleansed contact lens may enable amoebae to multiply and provide an infective dos e when placed onthe cornea.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 25

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