Résumé Les traumatismes du rachis représentent une des lésions les plus fréquemment observées, chez les victimes d’accidents de circulation, d’accident de sportifs, domestique et du travail. Il s’agissait d’une étude rétrospective de 3 ans portant sur 139 cas de traumatismes du rachis hospitalisés et pris en charge dans le service de neurochirurgie du CHUJRA Madagascar. A travers cette étude, 2...

Flight necessitates that the feather rachis is extremely tough and light. Yet, the crucial filamentous hierarchy of the rachis is unknown-study hindered by the tight chemical bonding between the filaments and matrix. We used novel microbial biodegradation to delineate the fibres of the rachidial cortex in situ. It revealed the thickest keratin filaments known to date (factor >10), approximately...

T H E feather is the most elaborate of all the derivatives of the Malpighian layer. The production of so complex a structure from so simple a layer of cells is a challenge to the developmental anatomist and has been studied for many years. Historically two main views of the fundamentals of feather development may be distinguished. In 1889 Davies published a very full account in which he de­ scr...

In this research, five species of genus Polystichum, belong to Aspidiaceae, namely, P. lonchitis, P. woronowii, P. setiferum, P. braunii and P. aculeatum, gathered from Gilan and MazandaranProvinces were anatomically studied. To distinguish anatomical character of different growing organs such as pinnules, rachis, rhizumes and roots, the cross section was prepared. Based on these researches, id...

Fusarium head blight (FHB) is a serious disease of wheat worldwide. Cultivar resistance to FHB depends on biochemical factors that confine the pathogen spread in spikes. Breeding for cultivar resistance is considered the most practical way to manage this disease. In this study, different spectroscopy and microscopy techniques were applied to discriminate resistance in wheat genotypes against FH...

The racket-tipped tail of the motmots is uniquely shaped and its formation has attracted much attention. Barbs that grow along the wire of the motmot’s two central tail feathers are weakly attached and shed soon after development. The cause of the weak attachment of these barbs is unclear. I induced feather growth by plucking the central tail feathers from seven turquoise-browed motmots Eumomot...

Thin sections of the rachis of regenerating follicles of pigmented fowl feathers and of mature non-pigmented seagull feather rachis, embedded in methacrylate and Araldite respectively, were studied in the electron microscope. The late stages of development of keratin fibrils were examined in OsO(4)-fixed follicle material, and after poststaining with lead hydroxide the keratin aggregates were f...

banana xanthomonas wilt is a systemic disease of banana plants. we investigated the risk of spreading xanthomonas campestris pv. musacearum (xcm) through asymptomatic mature bunches. samples of banana fingers and rachis from markets within kampala, uganda and at border points of uganda with dr congo, tanzania, rwanda and kenya were tested for the presence of xcm through recovery of the bacteriu...