Search results for "odor"

Modelling of Emissions from Large Biogas Plants

2015

Abstract The main objective of the “Guidelines for the development of agricultural biogas plants in Poland within 2010-2020”, is a construction of biogas plants processing agricultural biomass resources with suitable conditions in each municipality. In the Czech Republic produces about 6.5% of energy from renewable sources. Biogas plants give - contrary to solar and wind electricity stations - the stable performance throughout the whole year. Biomass should be a key source for achieving the Czech EU commitment to produce 13% of energy from renewable sources in 2020. The experience, where 317 Agricultural biogas plants are currently in operation, has shown that there are considerable problem…

Evidence of regional differences in chlorine perception by consumers: sensitivity differences or habituation?

2014

Chlorinous flavors are a leading cause of customers9 dissatisfaction with drinking water. Potential differences in chlorine perception were investigated by conducting sensory testing experiments in France and Spain to assess consumers9 sensory sensitivity (chlorine flavor detection threshold and supra-threshold intensity) as well as their liking of and acceptability for chlorinated solutions. In both countries, two groups of panelists were constituted based on their water drinking habits (tap vs. bottled water). Chlorine flavor detection threshold was found to vary depending on countries (0.17 mg/L Cl 2 in France and 0.56 mg/L Cl 2 in Spain). Taking into account that mean flavor detection t…

Hydrogen sulfide and odor removal by field-scale biotrickling filters: Influence of seasonal variations of load and temperature

2012

Two biotrickling filters were set up at two wastewater treatment plants (WWTP) in The Netherlands to investigate their effectiveness for treatment of odorous waste gases from different sources. One biotrickling filter was installed at Nieuwe Waterweg WWTP in Hook of Holland to study the hydrogen sulfide removal from headworks waste air. The other reactor was installed at Harnaschpolder WWTP (treating wastewater of the city of The Hague) to remove mercaptans and other organic compounds (odor) coming from the emissions of the anaerobic tanks of the biological nutrient removal (BNR) activated sludge. The performance of both units showed a stable and highly efficient operation under seasonal va…

Chemical Cues Influence Pupation Behavior of Drosophila simulans and Drosophila buzzatii in Nature and in the Laboratory.

2012

International audience; In the wild, larvae of several species of Drosophila develop in heterogeneous and rapidly changing environments sharing resources as food and space. In this scenario, sensory systems contribute to detect, localize and recognize congeners and heterospecifics, and provide information about the availability of food and chemical features of environments where animals live. We investigated the behavior of D. simulans and D. buzzatii larvae to chemicals emitted by conspecific and heterospecific larvae. Our goal was to understand the role of these substances in the selection of pupation sites in the two species that cohabit within decaying prickly pear fruits (Opuntia ficus…

Gene Regulation and Species-Specific Evolution of Free Flight Odor Tracking in Drosophila

2018

Running title: flight evolution in Drosophila This is an invited contribution to the special issue on Genetics of Adaptation based on a symposium of the same name at the National Centre for Biological Sciences (TIFR, Bangalore, India) in November 2016; International audience; The flying ability of insects has coevolved with the development of organs necessary to take-off from the ground, generate, and modulate lift during flight in complex environments. Flight orientation to the appropriate food source and mating partner depends on the perception and integration of multiple chemical signals. We used a wind tunnel-based assay to investigate the natural and molecular evolution of free flight …

Aroma compound sorption by oak wood in a model wine

2001

Oak wood used for wine barrels was immersed into a model wine containing eight aroma compounds (e.g., aromatic and terpene alcohols, ethyl esters, and aldehyde), for which activity coefficients in water and model wine were determined using the mutual solubility measurement. A mass balance of these volatiles considering their reactivity in model wine was established. For most of the studied aroma compounds, and mainly for linalool and ethyl octanoate, a sorption behavior into wood was reported for the first time. This phenomenon was selective and could not be related to the solubilities in model wine and hydrophobicities of the studied aroma compounds, suggesting that acid-base and polar cha…

Factors affecting flavor perception in space: Does the spacecraft environment influence food intake by astronauts?

2020

International audience; The intention to send a crewed mission to Mars involves a huge amount of planning to ensure a safe and successful mission. Providing adequate amounts of food for the crew is a major task, but 20 years of feeding astronauts on the International Space Station (ISS) have resulted in a good knowledge base. A crucial observation from the ISS is that astronauts typically consume only 80% of their daily calorie requirements when in space. This is despite daily exercise regimes that keep energy usage at very similar levels to those found on Earth. This calorie deficit seems to have little effect on astronauts who spend up to 12 months on the ISS, but given that a mission to …

José Vidal-Beneyto (1927-2010). In memoriam

2010

The Emergence of Pastoral Authority in the French Reformed Church (c.1555-c.1572)

2021

In The Emergence of Pastoral Authority in the French Reformed Church, c.1555-c.1572, Gianmarco Braghi offre un'ampia panoramica delle questioni e delle ambiguità connesse all'attuazione dell'autorità della prima generazione di pastori riformati francesi formati a Ginevra e delle loro implicazioni per il carattere e l'identità del primo movimento riformato francese in generale, utilizzandoli come prisma per l'analisi storica della transizione dall'evangelicalismo sciolto a una nascente rete sinodale-concistoriale di congregazioni riformate sparse nel regno di Francia. In The Emergence of Pastoral Authority in the French Reformed Church, c.1555-c.1572, Gianmarco Braghi offers a broad overview…

El Mal como problema político : el “paradigma Dostoievski” y el nacimiento de la distopía

2016

Fil: Del Percio, Daniel. Pontificia Universidad Católica Argentina; Argentina Fil: Del Percio, Daniel. Universidad de Palermo. Facultad de Ciencias Sociales. Centro de Investigación en Ciencias Sociales; Argentina Fil: Del Percio, Daniel. Universidad del Salvador; Argentina Resumen: Quizás uno de los aspectos más inquietantes del mal, visto desde la metafísica, es que posee un sorprendente paralelo con el nihilismo. Sobre ambos podemos decir que son problemas que no tienen solución, pero sí historia. Desde esta perspectiva, la literatura nos ofrece una extensísima lista de ejemplos que ilustran esa doble historia, tan complementaria entre sí, al punto de que cada una permite abrir un horizo…