Antonie van Leeuwenhoek

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Dissertations
Antonie van Leeuwenhoek - Tập 35 - Trang 392-392 - 1969
Co-culture with potentially probiotic microorganisms antagonises virulence factors of Clostridium difficile in vitro
Antonie van Leeuwenhoek - Tập 98 - Trang 19-29 - 2010
Fernando M. Trejo, Pablo F. Pérez, Graciela L. De Antoni
Toxigenic strains of Clostridium difficile were co-cultured with different strains of bifidobacteria and lactobacilli. Spent culture supernatants were tested for biological activity on cultured Vero cells. Co-culture of C. difficile with some potentially probiotic strains lead to a reduction of the biological activity of spent culture supernatants. The observed effects cannot be ascribed either to...... hiện toàn bộ
Streptomyces bullii sp. nov., isolated from a hyper-arid Atacama Desert soil
Antonie van Leeuwenhoek - - 2013
Rakesh Santhanam, Xiaoying Rong, Ying Huang, Bárbara A. Andrews, Juan A. Asenjo, Michael Goodfellow
Bacterial quorum sensing: circuits and applications
Antonie van Leeuwenhoek - Tập 105 - Trang 289-305 - 2013
Neera Garg, Geetanjali Manchanda, Aditya Kumar
Bacterial quorum sensing (QS) systems are cell density—dependent regulatory networks that coordinate bacterial behavioural changes from single cellular organisms at low cell densities to multicellular types when their population density reaches a threshold level. At this stage, bacteria produce and perceive small diffusible signal molecules, termed autoinducers in order to mediate gene expression....... hiện toàn bộ
Prevalence of the genus Cladosporium on the integument of leaf-cutting ants characterized by 454 pyrosequencing
Antonie van Leeuwenhoek - Tập 109 - Trang 1235-1243 - 2016
A. P. M. Duarte, M. Ferro, A. Rodrigues, M. Bacci, N. S. Nagamoto, L. C. Forti, F. C. Pagnocca
The relationship of attine ants with their mutualistic fungus and other microorganisms has been studied during the last two centuries. However, previous studies about the diversity of fungi in the ants’ microenvironment are based mostly on culture-dependent approaches, lacking a broad characterization of the fungal ant-associated community. Here, we analysed the fungal diversity found on the integ...... hiện toàn bộ
PCR-RFLP analysis of the IGS region of rDNA: a useful tool for the practical discrimination between species of the genus Debaryomyces
Antonie van Leeuwenhoek - Tập 90 - Trang 211-219 - 2006
Manuel Quirós, Patricia Martorell, María-José Valderrama, Amparo Querol, José M. Peinado, María-Isabel de Silóniz
The amplification by PCR of the intergenic spacer region (IGS) of rDNA followed by restriction fragment length polymorphism (RFLP) analysis was evaluated as a potential method for discriminating the 16 species belonging to the genus Debaryomyces. The digestion of this region with some or all the enzymes used in this study (HapII, HhaI and MboI) produced species-specific patterns that permitted dif...... hiện toàn bộ
Gluconacetobacter diazotrophicus PAL5 possesses an active quorum sensing regulatory system
Antonie van Leeuwenhoek - Tập 106 - Trang 497-506 - 2014
Elisa V. Bertini, Carlos G. Nieto Peñalver, Ana C. Leguina, Verónica P. Irazusta, Lucía I. C. de Figueroa
The endophytic bacterium Gluconacetobacter diazotrophicus colonizes a broad range of host plants. Its plant growth-promoting capability is related to the capacity to perform biological nitrogen fixation, the biosynthesis of siderophores, antimicrobial substances and the solubilization of mineral nutrients. Colonization of and survival in these endophytic niche requires a complex regulatory network...... hiện toàn bộ
Zinc oxide nanoparticle inhibits the biofilm formation of Streptococcus pneumoniae
Antonie van Leeuwenhoek - Tập 111 - Trang 89-99 - 2017
Purnita Bhattacharyya, Bikash Agarwal, Madhurankhi Goswami, Debasish Maiti, Sunandan Baruah, Prosun Tribedi
Biofilms are structured consortia of microbial cells that grow on living and non living surfaces and surround themselves with secreted polymers. Infections with bacterial biofilms have emerged as a foremost public health concern because biofilm growing cells can be highly resistant to both antibiotics and host immune defenses. Zinc oxide nanoparticles have been reported as a potential antimicrobia...... hiện toàn bộ
Biocontrol ability and volatile organic compounds production as a putative mode of action of yeast strains isolated from organic grapes and rye grains
Antonie van Leeuwenhoek - Tập 113 - Trang 1135-1146 - 2020
Renata Choińska, Katarzyna Piasecka-Jóźwiak, Beata Chabłowska, Justyna Dumka, Aneta Łukaszewicz
The inhibiting activity of three yeast strains belonging to Pichia kudriavzevii, Pichia occidentalis, and Meyerozyma quilliermondii/Meyerozyma caribbica genera against common plant pathogens representing Mucor spp., Penicillium chrysogenum, Penicillium expansum, Aspergillus flavus, Fusarium cereals, Fusarium poae, as well as Botrytis cinerea genera was investigated. The yeast strains tested had a ...... hiện toàn bộ
Experiments with an apparatus for lyophile desiccation of micro-organisms
Antonie van Leeuwenhoek - Tập 18 - Trang 113-124 - 1952
Hendrik L. Wolff
Lyophyle desiccation is an extremely valuable method of preserving micro-organisms. The apparatus described above proves satisfactory. The material should be frozen as rapidly as possible at a temperature of −35°C. or lower, and the apparatus should be constructed in such a way that the pressure remains approximatively constant. During the sealing of the ampoules care should be taken that no dry m...... hiện toàn bộ
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