1,063 research outputs found

    A comparison of Landau-Ginzburg models for odd-dimensional Quadrics

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    In [Rie08], the second author defined a Landau-Ginzburg model for homogeneous spaces G/P, as a regular function on an affine subvariety of the Langlands dual group. In this paper, we reformulate this LG model (X^, W_t) in the case of the odd-dimensional quadric, as a rational function on a Langlands dual projective space, in the spirit of work by R. Marsh and the second author for type A Grassmannians and by both authors for Lagrangian Grassmannians. We also compare this LG model with the one obtained independently by Gorbounov and Smirnov, and we use this comparison to deduce part of a conjecture of the second author for odd-dimensional quadrics

    Kentaro Sasaki : Physical education teacher belonged to Kinan-Sakkyou : His joining in Kinan・Sakkyou

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    Kentaro Sasaki, the author of "Taiiku-no-ko" had made many famous P.E.practices as a teacher of junior high school and high school at Kinan district since the end of the World War2.The features of his practices are ; 1) using compositions as educational method, 2) combining with educational guidance, 3) starting from reality of children's bodies and minds, and so on. This study attempts to clarify the process of his joining in Kinan-Sakkyou and the way to use compositions to practices anal- yzing his articles and "Kinan Kyoiku" which were bulletins of Kinan-Sakkyou

    A missense mutation in the arabidopsis copii coat protein sec24a induces the formation of clusters of the endoplasmic reticulum and golgi apparatus

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    How the endoplasmic reticulum (ER) and the Golgi apparatus maintain their morphological and functional identity while working in concert to ensure the production of biomolecules necessary for the cell's survival is a fundamental question in plant biology. Here, we isolated and characterized an Arabidopsis thaliana mutant that partially accumulates Golgi membrane markers and a soluble secretory marker in globular structures composed of a mass of convoluted ER tubules that maintain a connection with the bulk ER. We established that the aberrant phenotype was due to a missense recessive mutation in sec24A, one of the three Arabidopsis isoforms encoding the coat protomer complex II (COPII) protein Sec24, and that the mutation affects the distribution of this critical component at ER export sites. By contrast, total loss of sec24A function was lethal, suggesting that Arabidopsis sec24A is an essential gene. These results produce important insights into the functional diversification of plant COPII coat components and the role of these proteins in maintaining the dynamic identity of organelles of the early plant secretory pathway
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