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The History of PVC In 1912, a German chemist, Fritz Klatte, discovered the easiest method for PVC industrial production, which is of great significance in the history of PVC industry. However, before him, there are few scientists who contributed to...
An improved HPLC-UV method for the simultaneous quantification of triterpenic glycosides Introduction Centella asiatica (APIACEAE) is an ethnomedicinal herbaceous species, originated from India which grows spontaneously in subtropical regions: China, Malaysia, Australia, America, South Africa and Madagascar. In Madagascar, the...
Télécharger le fichier original (Mémoire de fin d'études) Comparison of constructal designs The comparison between the different constructal shapes meets an important issue: in function of the constructal level, the cooling tree-network does not cover the same area, as shown...
Les isotopes cosmogéniques 3He et Be dans les minéraux mafiques Samples Calibration of TCN production rates requires analysis of natural surfaces which (i) can be independently dated with precision, (ii) have suffered negligible erosion, and (iii) have not been buried...
Contamination des logements français en composés organiques semi-volatils en phase particulaire Chemical analysis Reagents and chemicals Certified standards of aldrin, 4,4’-DDE, dieldrin, α-endosulfan, endrin, -HCH (lindane), chlorpyrifos, diazinon, dichlorvos, cyfluthrin, cypermethrin, deltamethrin, permethrin, tributylphosphate, acenaphthene, anthracene, benzo(a)pyrene, fluoranthene, fluorene, phenanthrene,...
Analyse diachronique de la fragmentation des forêts du Liban New data and conceptual problems Remote sensing in landscape analysis In recent years, the use of satellite imagery in ecological research has increased dramatically. The widespread availability of satellite images and...
Les isotopes cosmogéniques 3He et Be dans les minéraux mafiques : développements analytiques, calibration et nouvelles applications Mise en évidence de la perte d’hélium cosmogénique par broyage des phénocristaux Recalibration des taux de production de 3 He Ce chapitre est...
Wave propagation Waves, as summarized in the insightful review by Keller (1979), are disturbances that propagate through space and time, usually by transference of energy. Propagation is the process of travel or movement from one place to another. Thus wave...
FULL-PLANE IMPEDANCE LAPLACE PROBLEM In this appendix we study the perturbed full-plane or free-plane impedance Laplace problem, also known as the exterior impedance Laplace problem in 2D, using integral equation techniques and the boundary element method. We consider the problem...
Rotorcraft aeromechanical system bond graph Rotor-airframe model using multibody dynamics A central coupling to be modeled in rotorcraft dynamics is the rotor-airframe one. This coupling is at the heart of the most classic aeroelastic phenomenon in helicopters such as ground...