Results 21 to 30 of about 200,471 (302)
Unprecedented synthesis of a 14-membered hexaazamacrocycle
Beilstein Journal of Organic Chemistry, 2023 The transformation of 3-[(ethoxymethylene)amino]-1-methyl-1H-pyrazole-4-carbonitrile into the 14-membered macrocycle, 2,10-dimethyl-2,8,10,16-tetrahydrodipyrazolo[3,4-e:3',4'-l][1,2,4,8,9,11]hexaazacyclotetradecine-4,12-diamine, by the reaction with ...
Anastasia A. Fesenko +1 more
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Spatial Confinement Causes Lifetime Enhancement and Expansion of Vortex Rings with Positive Filament Tension [PDF]
, 2015 We study the impact of spatial confinement on the dynamics of three-dimensional excitation vortices with circular filaments. In a chemically active medium we observe a decreased contraction of such scroll rings and even expanding ones, despite of their ...
Engel, Harald +2 more
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Bub2 regulation of cytokinesis and septation in budding yeast
BMC Cell Biology, 2009 Background The mitotic exit network (MEN) is required for events at the end of mitosis such as degradation of mitotic cyclins and cytokinesis. Bub2 and its binding partner Bfa1 act as a GTPase activating protein (GAP) to negatively regulate the MEN ...
Park Su Young +4 more
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A model of membrane contraction predicting initiation and completion of bacterial cell division [PDF]
, 2013 Bacterial cell division involves a complex and dynamic sequence of events whereby polymers of the protein FtsZ assemble at the division plane and rearrange to achieve the goal of contracting the cell membrane at the site of cell division, thus dividing ...
Alison Rodger +59 more
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Animal cell cytokinesis: the role of dynamic changes in the plasma membrane proteome and lipidome [PDF]
, 2016 In animal cells, cytokinesis is characterised by the formation of the mitotic spindle that signals the assembly of an actomyosin ring between the spindle poles.
Gould, Gwyn W.
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eLife, 2023 Antigen-induced B-cell receptor (BCR) signaling is critical for initiating and regulating B-cell activation. The actin cytoskeleton plays essential roles in BCR signaling.
Anshuman Bhanja +4 more
doaj +1 more source
Functionalisation of Artemisinin and Its Ring-contracted Derivatives
Molecules, 2007 Isoxazoline analogues of artemisinin were obtained in low yield and low diastereoselectivity from the 1,3-dipolar cycloaddition of nitrile oxides. Alternatively, starting from the aldehyde 7, a number of transformations - Wittig reaction and reduction ...
Wim Dehaen +2 more
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eLife, 2023 Ring-like structures made up of caveolae appear to drive the development of membrane invaginations called T-tubules which are important for muscle contraction.
Callum J Quinn, Katharine M Dibb
doaj +1 more source
Química Nova, 2005 The indan ring system is present in several compounds with important pharmacological properties. In this account recent examples of selected methods (Friedel-Crafts acylation, cycloaddition reactions, ring contraction, cyclization and resolution) for the
Helena M. C. Ferraz +3 more
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Relativistic contraction and related effects in noninertial frames [PDF]
, 1999 Although there is no relative motion among different points on a rotating disc, each point belongs to a different noninertial frame. This fact, not recognized in previous approaches to the Ehrenfest paradox and related problems, is exploited to give a ...
A. Tartaglia +14 more
core +2 more sources