scispace - formally typeset
Search or ask a question
Institution

Conservatoire national des arts et métiers

EducationParis, France
About: Conservatoire national des arts et métiers is a education organization based out in Paris, France. It is known for research contribution in the topics: Population & Orthogonal frequency-division multiplexing. The organization has 3573 authors who have published 7127 publications receiving 141430 citations. The organization is also known as: CNAM & Conservatoire des arts et métiers.


Papers
More filters
Journal ArticleDOI
TL;DR: The two main phases of a phytoplankton spring bloom in the South-eastern English Channel were studied during two 3-day cruises in March and May 1992 as mentioned in this paper.
Abstract: The two main phases of a phytoplankton spring bloom in the South-eastern English Channel were studied during two 3-day cruises in March and May 1992. Physico-chemical parameters were measured, such as temperature, salinity, density, turbidity and nutrients, as well as biological parameters ( in situ chlorophyll a fluorescence, photosynthetic pigments and fatty acids). Photo-synthetic pigments and fatty acids were used as taxonomic and physiological markers of phytoplankton populations. Data suggest the existence of two ‘ biological provinces ’ north and south of the Bay of Somme. In the Northern province, the bloom starts earlier, probably due to the shallower coastal water, and is characterized by high proportions of diatoms and, successively, of Prymnesiophytes ( Phaeocystis sp.). The bloom maintains high biomass levels sustained by inputs from the Somme River and probable nutrient regeneration. The Southern province, directly influenced by the Seine River, is characterized by a deeper coastal water column and the presence of phytoflagellates. Despite the higher supply of nutrients from the Seine River, the bloom starts later and supports a lower phytoplankton biomass. The differences between both areas are analysed on the basis of the hydrodynamism of the area, and are interpreted as two different stages of the same process. To understand the spatio-temporal variations of phytoplankton dynamics, interactions between biology and hydrodynamical characteristics of this area are discussed.

43 citations

Journal ArticleDOI
TL;DR: In this paper, the gas and aroma barrier properties of poly(lactic acid) (PLA) films were analyzed and the influence of PLA crystallinity on these properties was studied because of processing conditions.
Abstract: Poly(lactic acid) (PLA) films have a great interest for the food packaging. But the interaction between the food and the packaging must be investigated. The gas and aroma barrier properties of PLA were analysed and the influence of PLA crystallinity on these properties was studied because of processing conditions. The crystallinity seems to have no effect on helium and oxygen barrier properties but ethyl acetate as aroma compound has a plasticizing effect on the PLA film.

43 citations

Journal ArticleDOI
TL;DR: In this article, a review of different linear models that can be used to take into account an internal incompressible liquid in the vibratory analysis of a complex structure is presented.

43 citations

Journal ArticleDOI
TL;DR: In this article, the authors compare two laser shearography techniques for a quantitative experiment of composite material: digital phase-shifting speckle pattern and grating shearograph.
Abstract: The present work aims to compare two foremost shearography techniques for a quantitative experiment of composite material: digital phase-shifting speckle pattern and grating shearography. The chosen object was an open-hole tensile specimen fabricated by a non-crimped fabric. Both techniques of laser shearography measured surface strain and x-slope and revealed defects by catching the defect-induced deformation anomalies. In this comparative experiments, grating shearography had superiority in signal-to-noise ratio and spatial resolution to speckle shearography except the labour of the non-trivial specimen preparation. This comparative study will offer mechanical engineers a guideline for the reasonable selection of a technique of shearography for a particular test object.

43 citations

Journal ArticleDOI
01 Nov 2005
TL;DR: By pH switching, yields of Gd(III) recovery higher than 95% were obtained with selectivity factors up to 37 against La(III), indicating the feasibility of separating Gd (III) from La( III) using CPE.
Abstract: In the present study, cloud point extraction (CPE) is used with lipophilic chelating agents, 8-hydroxyquinoline (HQ) and Kelex 100 (K100), to extract and separate lanthanum(III) and gadolinium(III) from aqueous solutions. The methodology used is based on the formation of lanthanide(III) organic complexes that are soluble in a micellar phase of a non-ionic surfactant, Triton X-114. The lanthanide(III) complexes are then extracted into the surfactant-rich phase at a temperature above the cloud-point temperature. Influence of pH of the solution, structure of the chelating agent, chelating agent/lanthanides(III) molar ratio, on extraction efficiency and selectivity is studied. High extraction efficiency and selectivity for Gd(III) is observed using HQ whereas K100 is a poor extractant. By pH switching, yields of Gd(III) recovery higher than 95% were obtained with selectivity factors up to 37 against La(III), indicating the feasibility of separating Gd(III) from La(III) using CPE.

43 citations


Authors

Showing all 3635 results

NameH-indexPapersCitations
Joshua A. Salomon107435124708
Serge Hercberg10694256791
Pilar Galan9762846782
Patrice Simon8926466332
Yuh-Shan Ho8034648242
Pierre-Louis Taberna6820934293
J. David Spence6739917671
Mathilde Touvier6532131586
Sébastien Czernichow6427414654
Emmanuelle Kesse-Guyot5733810914
Valentin Petrov5474312127
Sandrine Bertrais531699618
Paco Bustamante522959136
Khaled Ezzedine503138939
Arnaud Fontanet5020411964
Network Information
Related Institutions (5)
École Normale Supérieure
99.4K papers, 3M citations

93% related

University of Paris
174.1K papers, 5M citations

91% related

University of Bordeaux
55.5K papers, 1.6M citations

91% related

Université catholique de Louvain
57.3K papers, 2.1M citations

90% related

Royal Institute of Technology
68.4K papers, 1.9M citations

90% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20238
2022124
2021383
2020419
2019399
2018362