D. Marshall Porterfield

The biophysical limitations in physiological transport and exchange in plants grown in microgravity.

Control of ascorbic acid efflux in rat luteal cells: role of intracellular calcium and oxygen radicals.

Nitric oxide is involved in growth regulation and re-orientation of pollen tubes.

Plant phenylacetaldehyde synthase is a bifunctional homotetrameric enzyme that catalyzes phenylalanine decarboxylation and oxidation.

Measuring metabolism and biophysical flux in the tissue, cellular and sub-cellular domains: recent developments in self-referencing amperometry for physiological sensing.

Nitric oxide and cGMP signaling in calcium-dependent development of cell polarity in Ceratopteris richardii.

Oxygen flux as an indicator of physiological stress in fathead minnow (Pimephales promelas) embryos: a real-time biomonitoring system of water quality.

Compartmentalized nanocomposite for dynamic nitric oxide release.

Electrochemical biosensor of nanocube-augmented carbon nanotube networks.

Electrochemical glucose biosensor of platinum nanospheres connected by carbon nanotubes.

Non-invasive quantification of endogenous root auxin transport using an integrated flux microsensor technique.

Self-referencing optrodes for measuring spatially resolved, real-time metabolic oxygen flux in plant systems.

Oscillatory glucose flux in INS 1 pancreatic β cells: a self-referencing microbiosensor study.

Changes in gravity rapidly alter the magnitude and direction of a cellular calcium current.

Transforming the fabrication and biofunctionalization of gold nanoelectrode arrays into versatile electrochemical glucose biosensors.

Optical nanosensor architecture for cell-signaling molecules using DNA aptamer-coated carbon nanotubes.

Cell-mediated deposition of porous silica on bacterial biofilms.

Non-invasive tools for measuring metabolism and biophysical analyte transport: self-referencing physiological sensing.

A comparative study of enzyme immobilization strategies for multi-walled carbon nanotube glucose biosensors.

Microbiosensors based on DNA modified single-walled carbon nanotube and Pt black nanocomposites.

Mechanical stretch induced calcium efflux from bone matrix stimulates osteoblasts.

Abnormal mitochondrial function impairs calcium influx in diabetic mouse pancreatic beta cells.

Non-invasive flux measurements using microsensors: theory, limitations, and systems.

RNA-seq analysis identifies potential modulators of gravity response in spores of Ceratopteris (Parkeriaceae): evidence for modulation by calcium pumps and apyrase activity.