http://precedings.nature.com/tags/molecules Recently posted documents tagged with 'molecules' Nature Publishing Group en Nature Precedings http://precedings.nature.com/images/header_logo.gif http://precedings.nature.com http://dx.doi.org/10.1038/npre.2009.2989.1 Developmental biologists have long strived to understand how organisms acquire shape and form. The architecture of the mature plant is established during embryogenesis. They have learned much about how gene expression controls the specification of cell type and about how cells interact with one another to coordinate such specific decisions. Far less is known about autocatalytic feedback flow of resource molecules regulating a plant and its parts, shape and form. Indeed, it has even been proposed that the development of shape is not under genetic control but rather is determined by physical forces. Asymmetric development of sinks that depend on common resource pool has been viewed as a consequence of autocatalytic feedback process of flow of resource units into them. The feedback process implies that the stronger a sink is relative to its competitors, the greater is its probability of getting further resources as a non-linear function of its resource drawing ability and sink size. We have shown that this model contrasts with that of sink strength dependent model in its prediction of the subsequent development of the initial asymmetry of growing cotyledons of the tomato embryo (Lycopersicon esculentum L.), when their resource drawing ability is enhanced by exogenous application of the growth regulators (NAA, GA and BA), we test these prediction and show that the results are in conformity with the autocatalytic model proposed by Ganeshaiah and Uma Shaanker. http://dx.doi.org/10.1038/npre.2009.2989.1 Tue, 31 Mar 2009 11:05:33 UTC Asymmetric development of Cotyledons of Tomato Embryo: Testing the prediction of Self-Organization doi:10.1038/npre.2009.2989.1 2009-03-31 Chalapathy Reddy Nature Precedings 2009-03-31T11:05:33Z Manuscript Plant Biology http://creativecommons.org/licenses/by/3.0/ http://dx.doi.org/10.1038/npre.2007.50.1 Jmol is a free, open source molecule viewer for chemistry and biochemistry. It is cross-platform, running on Windows, Mac OS X, and Linux/Unix systems. The software consists of three parts: the JmolApplet is a web browser applet that can be integrated into web pages; the Jmol application is a standalone Java application that runs on the desktop; and the JmolViewer is a development tool kit that can be integrated into other Java applications. http://dx.doi.org/10.1038/npre.2007.50.1 Thu, 14 Jun 2007 13:14:29 UTC Fast and Scriptable Molecular Graphics in Web Browsers without Java3D doi:10.1038/npre.2007.50.1 2007-06-14 Egon Willighagen Nature Precedings 2007-06-14T13:14:29Z Manuscript Chemistry Bioinformatics http://creativecommons.org/licenses/by/2.5/