Model studies on the release of aroma compounds from structured and nonstructured oil systems using proton-transfer reaction mass spectrometry     

Landy P  Pollien P  Rytz A  Leser ME  Sagalowicz L  Blank I  Spadone JC 《Journal of agricultural and food chemistry》2007,55(5):1915-1922

Relative retention, volatility, and temporal release of volatile compounds taken from aldehyde, ester, and alcohol chemical classes were studied at 70 degrees C in model systems using equilibrium static headspace analysis and real time dynamic headspace analysis. These systems were medium-chain triglycerides (MCT), sunflower oil, and two structured systems, i.e., water-in-oil emulsion and L2 phase (water-in-oil microemulsion). Hydrophilic domains of the emulsion type media retained specifically the hydrophilic compounds and alcohols. Four kinetic parameters characterizing the concentration- and time-dependent releases were extracted from the aroma release curves. Most of the kinetic parameter values were higher in structured systems than in oils particularly when using MCT. The oil nature was found to better control the dynamic release profiles than the system structures. The release parameters were well-related (i) to the volatile hydrophobicity as a function of the oil used and (ii) to the retention data in the specific case of the L2 phase due to a specific release behavior of alcohols.  相似文献   

Inter-Alu PCR like genomic profiling in banana     

Franc-Christophe Baurens  Jean-Louis Noyer  Claire Lanaud  Pierre Jean Laurent Lagoda 《Euphytica》1998,99(2):137-142

Alu sequences are a major repetitive element of the primate genome. To date Alu sequences have seldom been reported in plant genomes. We report here an inter-Alu PCR like genomic profiling in banana using a single primer designed from a human Alu sequence. The different Musa species involved in the complex genome of banana cultivars can thus be discriminated. The use of this technique for monitoring germplasm or genotyping cultivars is discussed. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献