SAR in plants is found to correlate with induction of a set of putative defense genes including PR proteins (Linthorst, 1991). The PR proteins are a group of extracellular proteins that are induced by different phytopathogens such as viruses, bacteria, and fungi, and SAR-inducing compounds such as salicylic acid and 2,6-dichloroisonicotinic acid (Bol et al., 1990; Uknes et al., 1992). These pro...

Although the naturally occurring or-amino acids are usually of the L configuration, examples continue to accumulate of the occurrence in natural products of n-amino acids (1). Certainly the most surprising reports of this type have been those of Kogl and coworkers on the isolation of n-glutamic acid from cancerous tissue. Since his original publication in 1939 (2), and despite the fact that his...

L’ossification hétérotopique est une ossification pathologique des parties molles. C’est une affection bénigne, récidivante et de survenue imprévisible. On décrit le cas d’un patient, traité pour une fracture du plateau tibial gauche avec mise en place d’une plaque vissée. A deux mois de l’opération, le patient a présenté une raideur du genou gauche. Le bilan radiologique standard a révélé une ...