نتایج جستجو برای: envelope
تعداد نتایج: 38875 فیلتر نتایج به سال:
We calculate the orbital evolution of binary systems where the primary star is an evolved red giant branch (RGB) star, while the secondary star is a low mass main sequence (MS) star or a brown dwarf. The evolution starts when a tidal interaction causes the secondary to spiral-in. Either a common envelope (CE) is formed in a very short time, or the system reaches synchronization and the spiralin...
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March 22, 1994 A wealthy eccentric places two envelopes in front of you. She tells you that both envelopes contain money, and that one contains twice as much as the other, but she does not tell you which is which. You are allowed to choose one envelope, and to keep all the money you find inside. This may seem innocuous, but it generates an apparent paradox. Say that you choose envelope 1, and i...
High-throughput protein localization studies require multiple strategies. Mass spectrometric analysis of defined cellular fractions is one of the complementary approaches to a diverse array of cell biological methods. In recent years, the protein content of different cellular (sub-)compartments was approached. Despite of all the efforts made, the analysis of membrane fractions remains difficult...
We propose a new simple formalism to predict the orbital separations after common-envelope phases with massive star donors. focus on fact that red supergiants tend have sizeable radiative layer between dense helium core and convective envelope. Our treats phase in two stages: dynamical in-spiral through outer envelope thermal timescale mass transfer from intershell. With fiducial choices of par...
During prophase in higher cells, centrosomes localize to deep invaginations in the nuclear envelope in a microtubule-dependent process. Loss of nuclear membranes in prometaphase commences in regions of the nuclear envelope that lie outside of these invaginations. Dynein and dynactin complex components concentrate on the nuclear envelope prior to any changes in nuclear envelope organization. The...
To map the regions of the external envelope glycoproteins of human immunodeficiency virus type 1 (HIV-1) involved in the process of membrane fusion, we determined the syncytium-inducing capacity of a panel of transiently expressed chimeric envelope genes. This panel was generated by exchanging gene fragments between four previously studied envelope genes that exhibited a high degree of sequence...
Both acyl-CoA synthetase and acyl-CoA thioesterase activities are present in chloroplast envelope membranes. The functions of these enzymes in lipid metabolism remains unresolved, although the synthetase has been proposed to be involved in either plastid galactolipid synthesis or the export of plastid-synthesized fatty acids to the cytoplasm. We have examined the locations of both enzymes withi...
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