Results 311 to 320 of about 6,524,554 (346)
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Central control of bone formation
Journal of Bone and Mineral Metabolism, 2001Vertebrates constantly remodel bone to maintain a constant bone mass. Bone remodeling comprises two phases: bone resorption by the osteoclasts followed by bone formation by the osteoblasts. Although the prevailing view about the control of bone remodeling is that it is an autocrine/paracrine phenomenon, the bone resorption arm of bone remodeling is ...
S, Takeda, G, Karsenty
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Control of chloroplast formation by light
Cell Biology International Reports, 1979Light controls the formation of plastid ultrastructure and the synthesis of chlorophyll, plastid membrane constituents and Calvin cycle enzymes. A respective light-mediated regulation of the genetic apparatus in the nucleus and the plastid compartment has been reported. Three photoreactions are involved in the regulation: (1) the protochlorophyll (ide)
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A feedback architecture for formation control
Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334), 2000This paper addresses the problem of coordinating multiple spacecraft to fly in tightly controlled formations. The main contribution of the paper is to introduce a coordination architecture that subsumes leader-following, behavioral, and virtual-structure approaches to the multi-vehicle coordination problem.
Randal W. Beard +2 more
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Genes that control the formation of the liver
Hepatology, 1994The proto-oncogene c-jun is the cellular homologue of v-jun, the transforming oncogene of the avian sarcoma virus 17. c-jun encodes one major component of the AP-1 transcription factor complex and is expressed in many organs during mouse development and in the adult.
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Struvite formation, control and recovery
Water Research, 2002Recent legislation on the removal of nutrients from wastewater has led to a number of operation problems with struvite scaling. Struvite is MgNH4PO4 x 6H2O and this paper reviews the formation, control and recovery of struvite from primarily municipal wastewater and other waste streams.
James D, Doyle, Simon A, Parsons
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Control of coleader formations in the plane
Proceedings of the 48h IEEE Conference on Decision and Control (CDC) held jointly with 2009 28th Chinese Control Conference, 2009This paper addresses the n-agent formation shape maintenance problem in the plane. We consider a class of directed information architectures associated with so called minimally persistent coleader formations. The formation shape is specified by certain interagent distances. Only one agent is responsible for maintaining each distance.
Tyler H. Summers +3 more
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Epigenetic control of memory formation
ScienceA neuron’s suitability to participate in a memory trace is modulated by its epigenetic ...
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