DC/DC converter 3D assembly for autonomous sensor nodes

This paper reports on the design and the manufacturing of an integrated DCDC converter, which respects the specificity of sensor node network: compactness, high efficiency in acquisition and transmission modes, and compatibility with miniature Lithium batteries. A novel integrated circuit (ASIC) has been designed and manufactured to provide regulated Voltage to the sensor node from miniaturized, thin film Lithium batteries. Then, a 3D integration technique has been used to integrate this ASIC in a 3 layers stack with high efficiency passives components, mixing the wafer level technologies from two different research institutions. Electrical results have demonstrated the feasibility of this integrated system and experiments have shown significant improvements in the case of oscillations in regulated voltage. However, stability of this output voltage toward the input voltage has still to be improved

Softening of kiwifruit in storage. Effects of intermittent high CO2 treatments

International audienc

Softening of kiwifruit in storage. Effects of intermittent high CO2 treatments.

International audienc

Mode d'action du CO2 sur la synthese de l'ethylene chez le kiwi

National audienc

Development of a non destructive test for firmness measurement during cool storage of kiwifruit

International audienc

Effects of different conditions of cold storage upon physicochemical changes of kiwi fruit

International audienc

A direct genetic strategy for identifying novel regulators of fruit tissue morphology in tomato

International audienc

Towards a better understanding of endoreduplication in tomato fruit growth

National audienc

Towards the identification and characterization of novel regulators of fruit tissue morphology in tomato

International audienc

Analyses of tomato fruit brightness mutants uncover both cutin-deficient and cutin- abundant mutants and a new hypomorphic allele of GDSL lipase

Cuticle is a protective layer synthesized by epidermal cells of the plants and consisting of cutin covered and filled by waxes. In tomato fruit, the thick cuticle embedding epidermal cells has crucial roles in the control of pathogens, water loss, cracking, postharvest shelf-life and brightness. To identify tomato mutants with modified cuticle composition and architecture and to further decipher the relationships between fruit brightness and cuticle in tomato, we screened an EMS (ethyl methanesulfonate) mutant collection in the miniature tomato cultivar Micro-Tom for mutants with altered fruit brightness. Our screen resulted in the isolation of 16 glossy and 8 dull mutants displaying changes in the amount and/or composition of wax and cutin, cuticle thickness and surface aspect of the fruit as characterized by optical and Environmental Scanning Electron microscopy. Main conclusions on the relationships between fruit brightness and cuticle features are that (i) screening for fruit brightness is an effective way to identify tomato cuticle mutants, (ii) fruit brightness is independent from wax load variations, (iii) glossy mutants show either reduced or increased cutin load, (iv) dull mutants display alterations in epidermal cell number and shape. Cuticle composition analyses further allowed the identification of groups of mutant displaying remarkable cuticle changes e.g., mutants with increased dicarboxylic acids in cutin. Using genetic mapping of a strong cutin-deficient mutation, we next discovered a novel hypomorphic allele of GDSL lipase carrying a splice junction mutation, thus highlighting the potential of tomato brightness mutants for advancing our understanding of cuticle formation in plants