Search results for "Vial"
showing 10 items of 408 documents
An automatic system for stepwise treatment of solid samples and application to pollution evaluation by measuring ion lixiviation rates in lichens
1999
An automatic system for the stepwise treatment of solid samples is described. The system is controlled by a PC computer that is connected to a burette equipped with a three-way valve, to a peristaltic pump, and to a robot arm through two serial interfaces. In a cycle, the burette introduces a solvent volume in the sample cell, sonication is applied, and, after a fixed time, the pump carries the solvent to the vial selected by the robot arm. Measurements can be performed both in-line and off-line by analyzing the vial series. The program was written in Visual Basic 3. Lixiviation rates of several cations from the lichen Ramalina farinacea were measured by capillary zone electrophoresis using…
Effects of hydrological events on morphological evolution of a fluvial system
2018
Abstract This study quantifies morphological evolution of the Dez River, Iran, from 1955 to 2016. The approach uses a sequence of Landsat images, aerial photos, and topographic maps. In addition, the hydrological data including average daily discharge and yearly maximum discharge at the Dezful hydrological station for the period (1955–2016) were used. The study reach was divided into 48 meander loops from upstream to downstream. Active channel width (w) was determined at 10 m intervals and changes assessed along the study reach of the Dez River. Morphological indices including sinuosity index; straight meander length; centerline flow length; erosion area; erodible length channel migration; …
L'anima dell'Oreto rifiutata, sognata, cantata.
2007
La città di Palermo ha davvero voltato le spalle all’Oreto? Molti abitanti di Palermo considerano il fiume Oreto come un canale di scarico, altri una potenzialità per la realizzazione di un parco fluviale. I bambini dei quartieri vicini lo sperimentano come spazio di avventura. Il modulo di recupero e riqualificazione del Laboratorio di Urbanistica mira ad attivare un processo comunicativo attraverso l’ascolto attivo, l’osservazione e la redazione di reportage al fine di cogliere gli aspetti vitali che legano il fiume alla città e restituire una nuova visione della valle fluviale rispondente ai desideri degli abitanti, esclusi o inclusi dal suo uso, in modo da trasformare questa realtà nega…
Scour on alluvial bed downstream of grade-control structures
2004
This paper describes an approach for predicting local scour downstream of grade control structures. The developed analysis applies the incomplete self-similarity (ISS) theory for deducing some physically based dimensionless groups controlling the geometrical pattern of the scour profile. The scour measurements available in the literature in conjunction with numerous unpublished data allow a multiregressive calibration of the ISS relationships. The experimental sample includes different bed grain-size distributions and scales of the erosive phenomenon. The results prove that the ratio between the upstream water head and the weir height is able to explain the measurements of scour depth carri…
Lettura - Magnaghi A., Giacomozzi S. (a cura di) (2009), Un fiume per il territorio. Indirizzi progettuali per il parco flu- viale del Valdarno empol…
2011
Proliferative response of synovial fluid and peripheral blood mononuclear cells to arthritogenic and non-arthritogenic microbial antigens and to the …
1990
Cellular immune responses to microbial antigens have been implicated in the pathogenesis of some forms of arthritis including reactive arthritis, Reiter's syndrome, ankylosing spondylitis and rheumatoid arthritis. We investigated the proliferative T cell responses of paired peripheral blood (PB) and synovial fluid (SF) mononuclear cells (MC) to so-called arthritogenic bacteria (Yersinia enterocolitica and Salmonella typhimurium), to control antigens, such as Candida albicans, mumps virus and purified protein derivative, to the recombinant mycobacterial 65-kDa heat-shock protein (hsp 65) and the mitogen phytohemagglutinin (PHA) in 16 patients with different inflammatory rheumatic diseases. T…
Estudio de la tasa de retroceso de una vertiente mediterránea en los últimos 5000 años (Serra del Benicadell, sur del País Valenciano)
1981
Mineralogical and chemical variability of fluvial sediments: 1. Bedload sand (Ganga–Brahmaputra, Bangladesh)
2010
This study investigates the natural processes that control concentration of detrital minerals and consequently chemical elements in river sand. The novelty of our approach consists in the systematic integration of detailed textural, petrographical, mineralogical and chemical data, and in the quantitative description and modeling of relationships among mineralogical and chemical variables for each sample and each grain-size class in each sample. Bed sediment in transit in the largest sedimentary system on Earth chiefly consists of fine-grained lithofeldspatho quartzose sand including rich amphibole–epidote–garnet suites, mixed with minor very-fine grained-sand to silt subpopulations containi…
Las terrazas del bajo Túria
1982
Las terrazas de la Rambla de Cervera
1984
En este artículo se hace un estudio de las terrazas de una rambla típicamente mediterránea, cuya cuenca de drenaje está muy condicionada por la estructura. La morfología y los análisis sedimentológicos de los cortes estudiados han servido para detectar los diferentes niveles de terrazas y a partir de ellos se ha elaborado una hipótesis sobre las diversas secuencias acumulación- incisión que han tenido lugar en el Cuaternario en esta área.