11,523 research outputs found
Harmonic maps, SU (N) skyrme models and yang-mills theories
Full text linkThis thesis examines the construction of static solutions of (3+l)-dimensional SU{N) Skyrme models, usual and alternative, and pure massive SU(N) Yang-Mills theories. In particular, the application of harmonic maps from S(^2) into the subspace of fields configuration space M. Here, the harmonic maps are used as an ansatz to factoring out the angular dependence part of the solutions from the field equations. In this thesis, we consider the harmonic maps S(^2) → Gr(n, N), where Gr(n, N) is the Grassmann manifold of n-dimensional planes passing through the origin in C(^N). Using the harmonic map ansatz of S(^2) → Gr(2, N) to study the usual SU(N) Skyrme models, we have found that our approximate solutions have marginally higher energies in comparison to the corresponding results previously obtained using CP(^N-1) as target space M. For exact spherically symmetric solutions, we present arguments which suggest that the only solutions obtained this way are embeddings. For the alternative SU(N) Skyrme models, using the harmonic map ansatz of S(^2) → CP(^N-1), we have found that our results for the energies of the exact spherically symmetric solutions are higher than in the usual models. When considering the pure massive SU(N) Yang-Mills theories, we have shown that by choosing the gauge potential to be of almost pure gauge form, the theories reduce to the usual SU(N) Skyrme models. This observation has suggested to us to consider the harmonic map ansatz of S(^2) → CP(^N-1) previously applied to monopole theories. Using this ansatz, we have constructed some bounded spherically symmetric solutions of the theories having finite energies
Pilot-test scale affinity chromatographic purification of trypsin and chymotrypsin from hog pancreas.
No full textFilosofía para los amantes del cine
No full textTambién disponible online: https://www.academia.edu/4209182/Filosof%C3%ADa_para_los_amantes_del_cinePublicado con la autorización del autorDice su autor: "Este no es, por lo tanto, un libro sobre el cine, o sobre una filosofía del cine. Es un libro de divulgación filosófica que utiliza al cine como instrumento"Publicado por el autor en JC Edicione
Phosphorylation of SU(VAR)3-9 by the chromosomal kinase JIL-1
Full text linkThe histone methyltransferase SU(VAR)3-9 plays an important role in the formation of heterochromatin within the eukaryotic nucleus. Several studies have shown that the formation of condensed chromatin is highly regulated during development, suggesting that SU(VAR)3-9's activity is regulated as well. However, no mechanism by which this may be achieved has been reported so far. As we and others had shown previously that the N-terminus of SU(VAR)3-9 plays an important role for its activity, we purified interaction partners from Drosophila embryo nuclear extract using as bait a GST fusion protein containing the SU(VAR)3-9 N-terminus. Among several other proteins known to bind Su(VAR)3-9 we isolated the chromosomal kinase JIL-1 as a strong interactor. We show that SU(VAR)3-9 is a substrate for JIL-1 in vitro as well as in vivo and map the site of phosphorylation. These findings may provide a molecular explanation for the observed genetic interaction between SU(VAR)3-9 and JIL-1
Partial purification and characterization of invertase isozymes from rice grains (Oryza sativa).
No full textProbing the protein structure of sweet potato starch phosphorylase with monoclonal antibodies
No full textStarch-accumulating sweet potato callus tissue devoid of b-amylase but with two starch phosphorylase isozymes.
No full textDifferential control of sympathetic-nerve activities during combined asphyxia and paramedian reticular nucleus stimulation in cats.
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