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Alzheimer's Risks



Posted in: Blog

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Sensing Homemade Bombs



Posted in: Blog

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Progress in Development of Improved Ion-Channel Biosensors

Improvements in design and fabrication have been made since a previous report. Further improvements have recently been made in the development of the devices described in “Improved Ion-Channel Biosensors” (NPO-30710), NASA Tech Briefs, Vol. 28, No. 10 (October 2004), page 30. As discussed in more detail in that article, these sensors offer advantages of greater stability, greater lifetime, and individual electrical addressability, relative to prior ion-channel biosensors.

Posted in: Briefs

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Activating STAT3 Alpha for Promoting Healing of Neurons

Natural anti-apoptotic, pro-axogenic mechanisms are stimulated artificially. A method of promoting healing of injured or diseased neurons involves pharmacological activation of the STAT3 alpha protein. Usually, injured or diseased neurons heal incompletely or not at all for two reasons: (1) they are susceptible to apoptosis (cell death); and (2) they fail to engage in axogenesis — that is, they fail to re-extend their axons to their original targets (e.g., muscles or other neurons) because of insufficiency of compounds, denoted neurotrophic factors, needed to stimulate such extension. The present method (see figure) of treatment takes advantage of prior research findings to the effect that the STAT3 alpha protein has anti-apoptotic and pro-axogenic properties.

Posted in: Briefs

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Hydrocyclone/Filter for Concentrating Biomarkers From Soil

This apparatus could detect biomarkers or chemical waste in soil. The hydrocyclone- filtration extractor (HFE), now undergoing development, is a simple, robust apparatus for processing large amounts of soil to extract trace amounts of microorganisms, soluble organic compounds, and other biomarkers from soil and to concentrate the extracts in amounts sufficient to enable such traditional assays as cell culturing, deoxyribonucleic acid (DNA) analysis, and isotope analysis. Originally intended for incorporation into a suite of instruments for detecting signs of life on Mars, the HFE could also be used on Earth for similar purposes, including detecting trace amounts of biomarkers or chemical wastes in soils.

Posted in: Briefs, TSP

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Linear Motors and Actuators Meets Automation Needs

Linear motors and actuators are now cost-competitive with ball screws and belt drives and offer distinctly superior agility and bandwidth for advanced positioning applications. New micromotors and actuators are helping to automate tasks not previously feasible. Direct linear drives are increasingly replacing servo-controlled pneumatic cylinders, contributing reliability and controllability, free from the cost, noise, and upkeep of air compressors.

Posted in: Features, Articles

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Motion Control Components Lend Hand to Biomedical Applications

The worlds of biomedical and motion control are joining at the hip, with motors, controllers, actuators, and other motion control components becoming key elements in advanced biomedical applications ranging from fluid dispensers to imaging tables to surgical simulation systems.

Posted in: Features, Articles

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