Search results for "IBA"
showing 10 items of 1355 documents
The presence of conifer resin decreases the use of the immune system in wood ants.
2008
5 pages; International audience; 1. Wood ants ( Formica paralugubris ) incorporate large amounts of solidified conifer resin into their nest, which reduces the density of many bacteria and fungi and protects the ants against some detrimental micro-organisms. By inducing an environment unfavourable to pathogens, the presence of resin may allow workers to reduce the use of their immune system. 2. The present study tested the hypothesis that the presence of resin decreases the immune activity of wood ants. Specifically, three components of the humoral immune defences of workers kept in resin-rich and resin-free experimental nests (antibacterial, lytic, and prophenoloxidase activities) were com…
Fermentation Products of Commensal Bacteria Alter Enterocyte Lipid Metabolism
2020
eferred to byJia Wen, John F. RawlsFeeling the Burn: Intestinal Epithelial Cells Modify Their Lipid Metabolism in Response to Bacterial Fermentation ProductsCell Host & Microbe, Volume 27, Issue 3, 11 March 2020, Pages 314-316; International audience; Despite the recognized capacity of the gut microbiota to regulate intestinal lipid metabolism, the role of specific commensal species remains undefined. Here, we aimed to understand the bacterial effectors and molecular mechanisms by which Lactobacillus paracasei and Escherichia coli regulate lipid metabolism in enterocytes. We show that L-lactate produced by L. paracasei inhibits chylomicron secretion from enterocytes and promotes lipid stora…
Discovering lactic acid bacteria by genomics
2002
International audience; This review summarizes a collection of lactic acid bacteria that are now undergoing genomic sequencing and analysis. Summaries are presented on twenty different species, with each overview discussing the organisms fundamental and practical significance, environmental habitat, and its role in fermentation, bioprocessing, or probiotics. For those projects where genome sequence data were available by March 2002, summaries include a listing of key statistics and interesting genomic features. These efforts will revolutionize our molecular view of Gram-positive bacteria, as up to 15 genomes from the low GC content lactic acid bacteria are expected to be available in the pu…
Impact of a new bio-pesticide produced by Paenibacillus sp. strain B2 on the genetic structure and density of soil bacterial communities
2007
The effect of paenimyxin, a new biopesticide produced by Paenibacillus sp. strain B2, on the density of soil bacterial communities was assessed by colony counting and by 16S rDNA and nirK quantitative polymerase chain reaction (PCR). Paenimyxin had a negative effect on the bacterial colony-forming unit (CFU) number, which was significantly reduced 2 and 4 days after treatment. The effect of paenimyxin on cultivatable bacteria was negligible 7 days after treatment. Approximately 107 16S rDNA sequences per gram of soil (dry weight) were detected by quantitative PCR in all samples. Paenimyxin did not affect the quantification of 16S rDNA or of the denitrifying bacterial community. In addition,…
Etude de deux fragments de sols de mortier - Monastère de Balamand (Liban)
2014
Different a-casein association states and their interaction with lipid vesicles to study antibacterial activity
The interactions between caseins and lipid membranes are fundamental for the physiological function of these proteins. Moreover, the understanding of the underlying molecular mechanisms is of great interest for the development of new casein derived antimicrobial peptides. Indeed, it was already shown that peptides derived from caseins possess antibacterial activity but their mechanisms of action is still debated. Here, we present an experimental study on the interaction between model lipid membranes and a-casein by means of spectroscopy and fluorescence microscopy techniques. a-casein is an unfolded protein that due to its amphiphilic nature is known to self-assembly into non-stable micella…
Il prezzo del consenso. Le compensazioni amministrative nel governo dell'ambiente e del territorio
2020
Nel governo dell’ambiente e del territorio le pubbliche amministrazioni si avvalgono spesso di misure compensative. Quando una attività economica, un piano amministrativo, un programma di sviluppo o il progetto di una infrastruttura pubblica o privata mettono a rischio il paesaggio, l’ambiente o il territorio, l’eventuale conflitto tra interessi pubblici e privati divergenti può essere composto mediante compensazioni reali o monetarie corrisposte attraverso meccanismi di scambio complessi e spesso multipolari. Tuttavia, ci si può chiedere se esse costituiscano una categoria giuridica unitaria. Inoltre, in presenza di una pluralità di semplici frammenti normativi, bisogna verificare i fondam…
Sieviešu un vīriešu algas nevienlīdzība Latvijā
2021
Bakalaura darba tēma ir “Sieviešu un vīriešu algas nevienlīdzība Latvijā”. Bakalaura darbā ir pētīts, kādi ir iespējamie ietekmējošie faktori algu atšķirībai starp abiem dzimumiem. Darba uzdevumi bija izpētīt algas nevienlīdzības būtību, apkopot un izanalizēt informāciju par dažādu nozaru algas atlīdzībām. Bakalaura darbs veidots no ievada, 3 nodaļām, 7 apakšnodaļām, secinājumiem un priekšlikumiem. Darbā iekļautas 88 lapas, 37 attēli, 42 tabulas. Literatūras sarakstā iekļauti 31 avoti. Atslēgvārdi: Algas nevienlīdzība, alga, dzimumu nevienlīdzība.
Vínculos entre pintores y miniaturistas del Gótico Internacional en Valencia. El caso del El Libro de horas Egerton de la British Library de Londres …
2022
El presente estudio pretende dar a conocer los vínculos con respecto a transferencia de conocimientos entre los miniaturistas y los pintores de retablos valencianos del Gótico Internacional a partir del uso de los mismo modelos estilísticos e iconográficos. Para ello, se analizarán detalladamente las miniaturas de dos manuscritos de origen valenciano como son el Libro de horas Egerton (ms. Egerton 2653), de la British Library de Londres, y el libro Capítulos de la Cofradía de Nuestra Señora de Belén, (ms. 74) de la Biblioteca de Catalunya. Del análisis de estas miniaturas se ha corroborado la fuerte vinculación estilística existente entre ellos con la pintura valenciana, pero a la vez de su…
Essential oils as multi-target compounds for novel food safety strategies
This research work has been developed in the context of the potencial applications of essential oils as multi-target compounds for novel food safety strategies, such as active packaging technologies. Essential oils are aromatic oils derived from plants and usually extracted by hydrodistillation when intended to be used in food. There is an increasing interest in the antimicrobial properties of essential oils due to the possibility of using them to replace ‘synthetic’ preservatives in food or, in general, to reduce viable numbers of pathogens along the food chain.