نتایج جستجو برای: symmetric division deg index

تعداد نتایج: 572682  

Journal: :Vision Research 1997
J.A.M JENNINGS W. N CHARMAN

Published experimental measurements of the ocular modulation transfer function (MTF) in the peripheral field are approximated by the expression T(f) = exp[-(f/fc)n], where T(f), f, fc, and n are modulation transfer, spatial frequency, spatial frequency constant and MTF index, respectively. It is shown that n (which describes the shape of the MTF) remains relatively constant at about 0.9 for fie...

1999
Mina Teicher M. TEICHER

The main result in this paper is as follows: Theorem. Let S be the branch curve in CP of a generic projection of a Veronese surface. Then π1(CP −S) is an extension of a solvable group by a symmetric group. A group with the property mentioned in the theorem is “almost solvable” in the sense that it contains a solvable normal subgroup of finite index. We pose the following question. Question. For...

1999
FRANÇOIS JAEGER KAZUMASA NOMURA

We study spin models as introduced in [20]. Such a spin model can be defined as a square matrix satisfying certain equations, and can be used to compute an associated link invariant. The link invariant associated with a symmetric spin model depends only trivially on link orientation. This property also holds for quasi-symmetric spin models, which are obtained from symmetric spin models by certa...

2003
KAZUMASA NOMURA

A spin model (for link invariants) is a square matrix W with non-zero complex entries which satisfies certain axioms. Recently it was shown that tWW−1 is a permutation matrix (the order of this permutation matrix is called the “index” of W ), and a general form was given for spin models of index 2. Moreover, new spin models, called non-symmetric Hadamard models, were constructed. In the present...

2014
Hong-Ryul Jung Kwang Hoon Song John T. Chang Junsang Doh

Similar to stem cells, naïve T cells undergo asymmetric division following activation. While asymmetric division of T cells has been shown to be an important mechanism for the generation of lymphocyte fate diversity during immune responses, key factors that influence whether T cells will undergo symmetric or asymmetric divisions are not completely understood. Here, we utilized immunological syn...

2017
Monika Humięcka Marcin Szpila Piotr Kłoś Marek Maleszewski Katarzyna Szczepańska

The mouse preimplantation embryo generates the precursors of trophectoderm (TE) and inner cell mass (ICM) during the 8- to 16-cell stage transition, when the apico-basal polarized blastomeres undergo divisions that give rise to cells with different fate. Asymmetric segregation of polar domain at 8-16 cell division generate two cell types, polar cells which adopt an outer position and develop in...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Milind Watve Sweta Parab Prajakta Jogdand Sarita Keni

Aging is known in all organisms that have different somatic and reproductive cells or in unicellular organisms that divide asymmetrically. Bacteria that divide symmetrically were believed to be immune to natural aging. The demonstration of functionally asymmetric division and aging in Escherichia coli recently has challenged this belief and led to the suggestion that aging might be inevitable f...

2013
Shinnosuke Suzuki Yusuke Nozawa Satoshi Tsukamoto Takehito Kaneko Hiroshi Imai Naojiro Minami

ING3 (inhibitor of growth family, member 3) is a subunit of the nucleosome acetyltransferase of histone 4 (NuA4) complex, which activates gene expression. ING3, which contains a plant homeodomain (PHD) motif that can bind to trimethylated lysine 4 on histone H3 (H3K4me3), is ubiquitously expressed in mammalian tissues and governs transcriptional regulation, cell cycle control, and apoptosis via...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Hideki Izumi Yasuhiko Kaneko

Asymmetric cell division (ACD) is believed to be a physiological event that occurs during development and tissue homeostasis in a large variety of organisms. ACD produces two unequal daughter cells, one of which resembles a multipotent stem and/or progenitor cell, whereas the other has potential for differentiation. Although recent studies have shown that the balance between self-renewal and di...

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