Search results for "Servo"

Sedimentological and diagenetic influences on low permeability properties of the Middle Jurassic limestones (Paris Basin, France)

2009

A detailed sedimentological, geochemical and mineralogical study is carried out on the Early Bajocian to Early Callovian (Middle Jurassic) limestones of the Paris Basin. Deposits include 18 lithofacies which are stacked into 10 third-order depositional sequences. Our geochemical study including a compilation of bibliographic data allows us to refine the existing sea surface palaeotemperature pattern. A cooling from the latest Early Bajocian to the Late Bajocian and a subsequent warming from the earliest Callovian to the Early/Middle Callovian transition are described using a proxy of sea surface temperatures. Together with δ13C and mineralogical data, our new δ18O values suggest a palaeo-cl…

Wastewater modification processes in a stabilization reservoir: a new mathematical model

2018

The paper presents a mathematical model for the simulation of the ecology of a wastewater stabilization reservoir (WSR). WSRs are hypertrophic aquatic systems devoted to water storage in warm countries where shortage conditions are often encountered. Several factors that affect the stabilization reservoir’s effluent quality were taken into account: hydraulics and hydrology, solar radiation, reaeration, algae, zooplankton, organic matter, pathogens, and sediment-water interactions. The model quantifies the specific influence of each factor on effluent quality, and evaluating the correlation between the different factors. State variables included in the model were: algae, dissolved oxygen, or…

Le cycle biogéochimique du carbone.

2013

5 pages; National audience; Bien qu’il ne soit pas l’élément chimique le plus présent sur Terre, le carbone est l’un des composés les plus marquants dans le fonctionnement et l’évolution du système Terre. Un ensemble de processus biogéochimiques nombreux et complexes permet son transfert d’un réservoir à un autre conduisant à un cycle planétaire. Ce dernier est partagé entre un cycle rapide, impliquant les réservoirs atmosphère, océan et biosphère, et un cycle lent, impliquant la croûte terrestre, les sols et l’océan.Le dioxyde de carbone étant un gaz à effet de serre, le cycle du carbone interagit très étroitement avec la machine climatique, aboutissant à la mise en place de boucles de rét…

Tarantino's Round Flat Characters: A (Mainly) Verbal Study of Reservoir Dogs (1992).

2012

International audience; This article revisits E.M. Forster's distinction between round and flat characters in order to study the balancing between genre characters and realistic characters Tarantino's first film effects. It starts by examining the relationship between the fictional director of the heist (Joe Cabot), the other characters and the real director in a scene where Tarantino's cameo as a minor character endows the fictional director with authority and consequently emphasizes the shared dimension of filmmaking. The author then argues that the characters' capacity to identify and articulate flatness and rotundity in themselves and each other makes them appear round as it implies tha…

Tietokonepohjainen observointi liikunnanopetuksen analysoinnin tukena

1999

First record of an established marbled crayfish Procambarus virginalis (Lyko, 2017) population in Estonia

2019

Invasive marbled crayfish Procambarus virginalis (Lyko, 2017) is spreading alarmingly fast across European countries and beyond. Early maturation, parthenogenetic reproduction mode and high growth rate contribute to a high potential invasiveness. Marbled crayfish can pose severe effects on native communities impacting the native crayfish populations being carrier of the crayfish plague disease caused by Aphanomyces astaci. Here we report the first record of marbled crayfish in Estonia. In total, 104 individuals were found in the artificially warm outflow channel of the cooling system of Balti Power Plant, entering to the water reservoir of the River Narva. Molecular analyses confirmed the m…

Strong temporal variation of consumer δ13C value in an oligotrophic reservoir is related to water level fluctuation

2023

Using stable carbon and nitrogen isotope analysis (δ 13 C and δ 15 N) to assess trophic interactions in freshwater ecosystems is a well established method, providing insight into ecosystem functioning. However, the spatial and temporal variability of isotope values, driven by environmental fluctuation is poorly understood and can complicate interpretations. We investigated how the temporal variation of stable isotopes in consumers (fish, crayfish and macrozoobenthos) of a canyon-shaped oligotrophic reservoir is associated with environmental factors such as water temperature, transparency, flooded area, and water quality measures. Consumers and their putative food sources were sampled and an…

Evidence that water transmits Vibrio vulnificus biotype 2 infections to eels

1995

Vibrio vulnificus biotype 2 is classically considered an obligate eel pathogen. However, it has recently been associated with one human septicemic case. In this paper, the opportunistic behavior of this pathogen is discussed. The bacterium can survive alone in brackish water or attached to eel surfaces for at least 14 days. It is able to spread through water and infect healthy eels by using skin as a portal of entry. These results suggest that water and infected eels may act as reservoirs of infection. A capsule seems to be essential for waterborne infectivity, which would explain why cells recovered from naturally diseased eels give rise to pure cultures of opaque colonies. The spread of t…

The wild boar (Sus scrofa, Linnaeus, 1758) as an important reservoir host for Alaria alata in the Baltic region and potential risk of infection in hu…

2020

Abstract Alaria alata trematode is widely distributed throughout Europe and has a complex life cycle in which wild boar serve as a reservoir host. The primary aims of the present study are to establish the occurrence of A. alata mesocercariae in naturally infected wild boar in Latvia and to assess the risk for humans to acquire A. alata infection via consumption of wild boar meat. By summarizing long-term data using the Trichinella inspection method from 2014 to 2019, the overall A. alata prevalence was 8.3%, of which significantly higher A. alata prevalence was observed during the summer seasons. Additionally, 43.9% (n = 485) of wild boar were found to be infected with A. alata using Alari…

Influence of Environmental Pollution and Living Conditions on Parasite Transmission among Indigenous Ecuadorians

2022

The purpose of this study was to evaluate the influence of environmental pollution and the living conditions of indigenous Ecuadorians on the transmission of enteroparasites in an Andean agricultural area located at high altitude. Environmental pollution was recorded after observation in each community. The parasites were identified by microscopic sediment analysis using physiological saline solution from macerated arthropods, washed vegetables, and human stools, utilizing four coproparasitological techniques (direct examination, Kato–Katz, ether concentration, and Ziehl–Neelsen). The results show that the inadequate disposal of human and animal excreta that contaminate soil and…