186 research outputs found
Isolation and characterization of PSII core complexes from a brown alga, Laminaria saccharina
AbstractPSII-enriched particles, active for DCIP-reduction, were prepared from Laminaria saccharina chloroplasts, and PSII core complexes were further purified by ion-exchange chromatography. They contained several polypeptides, four of them cross-reacting with antibodies raised against CP47, CP43, D1 and D2 of green plants. A second chromatography was required to separate: (i) a core antenna, composed of 51 kDa polypeptide subunits, binding 11 β-carotene, 4 chlorophyll (Chl) c and 7 fucoxanthin for 100 Chl a, and reacting with CP47 antibodies; and (ii) a reaction center complex consisting of two main polypeptides of 34 and 36 kDa. The pigment stoichiometry was of 5 Chl a and 0.5 β-carotene for 2 pheophytin a. The 34 and 36 kDa components cross-reacted with anti-D1 and anti-D2 antibodies, respectively. The presence of cytochrome b-559 was substantiated by spectrophotometry
Identification, au microscope électronique, d'un Myxovirus isolé d’une lésion de pneumonie du veau
Berkaloff A., Faye P., Charton André. Identification, au microscope électronique, d’un Myxovirus isolé d’une lésion de pneumonie du veau. In: Bulletin de l'Académie Vétérinaire de France tome 118 n°5, 1965. pp. 201-207
Etude préliminaire d’un enterovirus isolé d’une lésion de balano-posthite bovine
Un entérovirus bovin, appartenant au groupe sérologique I de La Placa, est isolé du fourreau d’un taureau d’insémination artificielle atteint de balano-posthite. Son rôle étiologique dans ce cas, bien que probable, n’est pas fermement établi
Rhinotrachéite infectieuse bovine : isolement du virus à l’occasion d’une enzootie observée dans le département de l’Aube
Charton André, Berkaloff A., Faye P., Lecoanet Jean, Le Layec Cl., Bernard C. Rhinotrachéite infectieuse bovine : Isolement du virus à l’occasion d’une enzootie observée dans le département de l’Aube. In: Bulletin de l'Académie Vétérinaire de France tome 123 n°3, 1970. pp. 123-129
Physodes and the phenolic compounds of brown algae. Composition and significance of physodes in vivo
Structural Color in Marine Algae
Structural colouration is widespread in the marine environment. Within the large variety of marine organisms, macroalgae represent a diverse group of more than 24,700 species. Some macroalgae have developed complex optical responses using different nanostructures and material compositions. In this review, we describe the mechanisms that are employed to produce structural colour in algae and provide a discussion on the functional relevance by analysing the geographical distribution and ecology in detail. In contrast to what is observed in the animal kingdom, we hypothesise that structural colour in algae predominantly functions for a non-communicative purpose, most likely protection from radiation damage, e.g. by harmful UV light. We suggest that the presence of structural colour in algae is likely influenced by local factors such as radiation intensity and turbidity of the water.Biotechnology and Biological Sciences Research Council (Grant ID: BBSRC David Phillips, 13 BB/K014617/1), European Research Council (Grant ID: ERC-2014-STG H2020 639088), Department of Chemistry, Cambridge (Philip and Patricia Brown Next Generation Fellowship), National Centre of Competence in Research “Bio-Inspired Materials”, Adolphe Merkle Foundatio
La civilisation du gène : Une réflexion sur l’impact des nouvelles techniques de la biologie
Berkaloff André. La civilisation du gène : Une réflexion sur l’impact des nouvelles techniques de la biologie. In: Diplômées, n°154, 1990. Quel environnement nous prépare le génie génétique ? Séminaire AFFDU-Currier 8-9 mars 1990. p. 235
La civilisation du gène. Une réflexion sur l’impact des nouvelles technologies de la biologie
Berkaloff André. La civilisation du gène. Une réflexion sur l’impact des nouvelles technologies de la biologie. In: Diplômées, n°154, 1990. Quel environnement nous prépare le génie génétique ? Séminaire AFFDU-Currier 8-9 mars 1990. pp. 113-118
The civilisation of the gene essay on the impact of new techniques upon biology
Berkaloff André. The civilisation of the gene essay on the impact of new techniques upon biology. In: Diplômées, n°154, 1990. Quel environnement nous prépare le génie génétique ? Séminaire AFFDU-Currier 8-9 mars 1990. p. 244
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