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Jean-Frédéric Brun,Emmanuelle Varlet-Marie,Guillaume Chevance,Marion Pollatz,Christine Fedou,Eric Raynaud de Mauverger 한국유변학회 2014 Korea-Australia rheology journal Vol.26 No.2
We recently proposed a unifying hypothesis to reconcile unexpected findings in exercise hemorheology andthe classical concepts of “hemorheologic fitness” and the “triphasic effects of exercise”, based on the “healthyprimitive lifestyle” paradigm. This paradigm assumes that evolution has selected genetic polymorphisms leadingto insulin resistance as an adaptative strategy to cope with continuous low intensity physical activity anda special alimentation moderately high in protein, rich in low glycemic index carbohydrates, and poor in saturatedfat. According to this protocol the true physiological picture would be that of an individual whose exerciseand nutritional habits are close from this lifestyle, both sedentary subjects and trained athletes representingsituations on the edge of this model. Unfortunately samples of people truly adhering to this ancestral lifestyleare hard to obtain. In order to address this picture we tried to compare databases obtained with our precedingpublished studies. As a model of the “healthy primitive lifestyle” we selected patients trained at low intensity(LI) and given an advice of protein intake around 1.2 g/kg/day. Results show a continuum for plasma viscositywhich seems to be lower in athletes than LI-trained and even more sedentaries. When sedentary subjectsbecome obese the most obvious characteristic is an increase in red blood cell (RBC) aggregation correlatedto the size of fat stores. It is clear that 3 months of LI are not a perfect model of “healthy primitive lifestyle”,but these data suggest that the most important effect of LI regular exercise is to decrease plasma viscosity andthat sedentarity increases RBC aggregation mostly when it results in increased fat storage.
Nicolas Andin,Antoine Longieras,Thierry Veronese,Frédéric Marcato,Carole Molina-Jouve,Jean-Louis Uribelarrea 한국생물공학회 2017 Biotechnology and Bioprocess Engineering Vol.22 No.3
The production of medium chain length polyhydroxyalkanoates by Pseudomonas putida KT2440 from fatty acids leads to the loss of a large proportion of carbon. We studied the possibility of a shift of potentially available energy and carbon towards monitored residual growth during the production phase. A Fed-Batch culture achieving 125.6 g/L of total biomass containing 54.4% (g/g) of medium chain length polyhydroxyalkanoates was carried out leading to an overall experimental carbon yield of 0.7 Cmole/Cmole. The analysis of modeling fluxes deduced from experimental data indicated how carbon and reduced cofactors (NADH and FADH2) were managed to conclude that part of the carbon and reduced cofactors made available by polymer production were used in anabolic pathways. The strategy which consisted in coupled growth and medium chain length polyhydroxyalkanoate production enhanced the global yields compared to growth followed by a production phase. The understanding of carbon and energy fluxes distribution allowed deducing optimized culture strategy to perform the highest reported in the literature.
Ribierre, Jean-Charles,Li, Zhao,Liu, Xiao,Lacaze, Emmanuelle,Heinrich, Benoî,t,Mé,ry, Stephane,Sleczkowski, Piotr,Xiao, Yiming,Lafolet, Fré,dé,ric,Hashizume, Daisuke,Aoyama, Tet The Royal Society of Chemistry 2019 Journal of materials chemistry. C, Materials for o Vol.7 No.11
<P>We report on an improved melt-processing method to prepare organic semiconducting layers with large crystal size and enhanced charge carrier mobilities. The organic compound used in this work is a solution-processable oligo(<I>p</I>-phenylene vinylene) derivative substituted at both ends with pyrene moieties. Accurate control of the temperature during the recrystallization of this compound from the melt enables the formation of large single crystal monodomains in thin films. The melt-processed organic layer shows higher mobilities in transistor configuration than in spin-coated films, which can be attributed to the presence of large-size crystalline monodomains as evidenced by X-ray diffraction measurements. We also investigated the photophysical properties of this material in spin-coated and melted films and found an increase of the photoluminescence quantum yield with the size of the crystals in the organic layer. The advantage of this method over the spin coating also allowed observation of amplified spontaneous emission that was only achieved in the melted film due to its improved luminescence efficiency. Overall, this study demonstrates a simple and versatile method, which does not require the use of any solvent and vacuum, to fabricate organic layers with large crystal size, suitable for the realization of organic electronic and light-emitting devices.</P>
Kim, Eui-Jong,He, Xi,Roux, Jean-Jacques,Johannes, Ké,vyn,Kuznik, Fré,dé,ric ELSEVIER 2019 APPLIED ENERGY -BARKING THEN OXFORD- Vol.238 No.-
<P><B>Abstract</B></P> <P>Recent developments in building energy models for urban energy simulation are primarily based on bottom-up modelling (<I>N</I> models used for <I>N</I> buildings). This work aims to develop a single assembled model for multiple buildings for convenient use in detailed urban analysis. The proposed model exhibits state-space model formalism, and a state-size reduction technique is applied to maintain model accuracy, even for a low-order representation. To accelerate the calculation time and ensure numerical stability, a direct solver is proposed to eliminate the iterative calculations required in Dymola for annual load calculations. The results of the proposed reduced model are in good agreement with the reference model. For a test case of ten buildings, a 2nd order reduced model (i.e., 2 differential equations) with the proposed direct solver can predict accurately the dynamic energy behaviour, resulting in an error of about 0.43% for the annual loads.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new fast and accurate district heating and cooling loads calculation method is proposed. </LI> <LI> Mathematical reduction technics are applied to the set of differential equations representing physics. </LI> <LI> The solver Dymola is used to calculate the load profiles. </LI> <LI> Only 2 differential equations are required to calculate the energy loads of 10 buildings. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Tran, Vu Long,Gé,not, Valé,rie,Audibert, Jean-Fré,dé,ric,Prokazov, Yury,Turbin, Evgeny,Zuschratter, Werner,Kim, Hyeong-Ju,Jung, Jaehun,Park, Soo Young,Pansu, Robert B. The Royal Society of Chemistry 2016 NEW JOURNAL OF CHEMISTRY Vol.40 No.5
<P>We have observed the precipitation of a fluorescent dye in a microfluidic 3D hydrodynamic mixing set up. In addition to the short fluorescence lifetime of the DBDCS molecule and to the long lifetime of its crystal, nuclei with an intermediate lifetime are observed. We show that the precipitation is slowed down by the presence of a viscous skin at the interface between water and THF. From the analysis of the decays, we map the concentration of the three species over half a million pixels and show that nucleation and growth occur all along the device by a slow diffusion of the water into the THF inner flow.</P>
Sensitized near-IR luminescence of lanthanide complexes based on push-pull diketone derivatives
Baek, Nam Seob,Kim, Yong Hee,Eom, Yu Kyung,Oh, Jung Hwan,Kim, Hwan Kyu,Aebischer, Annina,Gumy, Fré,dé,ric,Chauvin, Anne-Sophie,Bü,nzli, Jean-Claude G. Royal Society of Chemistry 2010 Dalton Transactions Vol.39 No.6
<P>Lanthanide complexes with two push-pull diketone derivatives as sensitizers have been developed as synthons for near-infrared emitting materials. The ligand substituents consist of a carbazole moiety with hole-transport properties and an aromatic or heteroaromatic unit. According to quantitative NMR analysis and complementary HPLC experiments, the diketones are predominantly in their enolic form in polar solvents such as THF and MeCN at room temperature. The preferred <I>cis</I>-enol form contributes strongly to the binding of lanthanide ions (Ln = Nd, Gd, Er). The resulting tris(diketonate) ternary complexes with terpyridine (Ln = Nd, Er) display sizeable near-IR emission with long luminescence lifetimes.</P> <P>Graphic Abstract</P><P>Lanthanide complexes with two push-pull diketone derivatives as sensitizers have been developed as synthons for near-infrared emitting materials. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b915893f'> </P>