Search results for "TRIF"

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,…

Spatial distribution of ammonia-oxidizing bacteria and archaea across a 44-hectare farm related to ecosystem functioning

2011

Characterization of spatial patterns of functional microbial communities could facilitate the understanding of the relationships between the ecology of microbial communities, the biogeochemical processes they perform and the corresponding ecosystem functions. Because of the important role the ammonia-oxidizing bacteria (AOB) and archaea (AOA) have in nitrogen cycling and nitrate leaching, we explored the spatial distribution of their activity, abundance and community composition across a 44-ha large farm divided into an organic and an integrated farming system. The spatial patterns were mapped by geostatistical modeling and correlations to soil properties and ecosystem functioning in terms …

Après les villes et les banlieues, les gentrifieurs envahissent le périurbain

2019

International audience; La gentrification ne concernerait selon Jean-Marc Stébé et Hervé Marchal plus uniquement les anciens quartiers populaires de centre-ville et des communes de proche banlieue. A travers l’exemple des couronnes périurbaines de Nancy, ils montrent le développement d’un nouveau front de gentrification, qui répond à un désir de nature et revêt des formes inédites.

Estratti di trifoglio per la preparazione di agenti antiafide

2006

Osmotic and cryoprotective effects of a mixture of DMSO and ethylene glycol on rabbit morulae.

1993

Abstract Comparisons were made of the osmotic and cryoprotective effects on rabbit embryos preserved by vitrification with 2 solutions and by conventional freezing. Embryos obtained from rabbits killed 70 to 72 h after mating were used in the study (n = 948). Initially, toxicity of the 3 cryoprotectants was studied in fresh (unfrozen) embryos (n = 135). Subsequently, embryos placed in ethylene glycol (EG, 40% v/v; n = 88) and ethylene glycol with dimethyl sulfoxide (EG+DMSO, 20% v/v each, respectively; n = 344) were loaded into straws and plunged directly into liquid nitrogen. Embryos placed in 1.5 M DMSO and 20% heat inactivated rabbit serum were subjected to conventional freezing in a pro…

Direct transfer of vitrified rabbit embryos.

1994

In this study we looked at the feasibility of transferring vitrified rabbit embryos directly into recipient does. Compacted morulae were vitrified in a solution of 20% ethylene glycol and 20% dimethyl sulfoxide. After thawing, and without step-wise diluted solution, the vitrified embryos were transferred into the recipient's uterine horns. Survival rate at birth differed from fresh rabbit embryos (40% vs 55%, P0.05). However, the percentage of does that delivered (94%) and the survival rate suggested this method is suitable for both storage and simple transfer of rabbit morulae.

Identification and quantification of microbial populations in activated sludge and anaerobic digestion processes

2014

Eight different phenotypes were studied in an activated sludge process (AeR) and anaerobic digester AnD) in a full-scale wastewater treatment plant by means of fluorescent in situ hybridization (FISH) and automated FISH quantification software. The phenotypes were ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, phosphate-accumulating organisms (PAO), glycogen-accumulating organisms (GAO), sulphate-reducing bacteria (SRB), methanotrophic bacteria and methanogenic archaea. Some findings were unexpected: (a) Presence of PAO, GAO and denitrifiers in the AeR possibly due to unexpected environmental conditions caused by oxygen deficiencies or its ability to survive …

The effect of plants on microbes, water quality, and fish performance in an aquaponic system

2023

Aquaponics is a way to utilize the nutrient-rich effluents from recirculating aquaculture systems (RAS) by combining hydroponics, i.e. soilless plant farming, with RAS. The plants in aquaponics can be grown as a single or mixed plant species together with fish. In this dissertation, I investigated if plant growth is affected in aquaponics compared to hydroponics and if the plants affected the growth and microbial communities in rainbow trout (Oncorhynchus mykiss) or water quality in aquaponics compared to RAS. The first experiment was conducted by pairing lettuce (Lactuca sativa) with mint (Mentha spicata), rucola (Diplotaxis tenuifolia), or wormwood (Artemisia absinthium) and growing them …

Desarrollo de embutidos con menores niveles de nitrificantes inoculados con levaduras seleccionadas para mantener las características sensoriales pro…

2020

Los agentes de curado (nitratos y nitritos) desempeñan funciones importantes en la elaboración de embutidos curado-madurados, entre las que se encuentra el desarrollo del aroma característico de estos productos. El uso exclusivo de nitrato, de nitrito o de una mezcla de los dos, puede tener diferente repercusión en el perfil aromático. Sin embargo, existe una tendencia a la reducción del uso de estos aditivos por su relación con la generación de N-nitrosaminas que ha hecho que en los últimos años exista una gran preocupación a nivel de los consumidores. Por ello, en la presente tesis doctoral se ha estudiado el efecto que produce la reducción de la cantidad añadida de nitrato o de la mezcla…

Modulació de l'artritis gotosa per dues molècules inhibidores de la caspasa-1

2020

L’artritis gotosa es una de les malalties articulars més freqüents d’artritis inflamatòria. Es produeix per la deposició d’urat monosòdic (MSU) en les articulacions, donant lloc a episodis aguts d’inflamació, que poden ser persistents i arribar a cronificar-se. La fagocitosi dels cristalls d’MSU pels neutròfils i macròfags genera la producció de ROS i l’activació de l’NFkappaB, alliberant citocines i activant l’NLRP3. Aquest inflamasoma indueix l’activació de la caspasa1 i la consegüent producció de les formes actives IL1beta i IL18. Les calcones són un grup de la família dels flavonoides, que han demostrat propietats antiinflamatòries i antiartrítiques, actuant sobre diverses dianes terapè…