Ultra-small, non-destructive fiber optic chemical probes (optrodes) will be developed for nutrient flux studies. t these probes will be used for the in situ measurement of the primary plant nutrients in soils, synthetic rooting media and in-plant vascular systems to study the flux dynamics. the… More

The investigation of photosynthetic processes is limited by chemical analysis technology. no satisfactory method exists for either making invasive measurements within, or inthe microenvironment around, living plants. the objective oof this research is to develop a suite of highly minia turized fiber… More

Submiiature probes will be developed to introduce a new microanalytical method to investigate the photosynthetic process within or immediately adjacent to plants. this will be achieved by designing a series of miniaturized (100mm) or submimiature (less than 25 mm) fiber optic chemical sensors (focs,… More

Fiber optics, fiber optic chemical sensors (focs), and fluorescence spectroscopy were combined to form the new technique of remote fiber fluorimetry. this methodology permits development of ductile probes to measure physiological parameters of interest to the gastroenterologist. the key to this… More

The use of microraman spectrometric techniques should allow the complete molecular analysis of a collected aerosol as small as 0.1 micrometer in diameter. this will provide a technique for analyzing the small particles which are key to understanding atmospheric chemistry. the ultimate goal of the… More

The use of the fiber optic chemical sensors (focs) is a direct response to nooaa's need for better ocean instrument ation and measurement systems. "small chemistry laboratories" are attached to the distal end of optical fibers to specific, sensitive measurements of preselected species. 4589 the… More

The technical objective of phase i is to demonstrate that a new type of fiber optic chemical sensor, using monoclonal antibodies as the reactants, can be developed which can rapidly, sensitively and specifically identify the presence of natural and induced diseases of military importance. phase i… More

The aim of this research is the construction of miniature (< 100 u m) fiber optic chemical sensors (focs) for the in- situ, non-destructive analysis of gases and liquids in liv- ing plants in their micro-environment. this will be accom- plished using remote fiber fluorimery, a new technology… More

A fiber optic chemical sensor (focs) is proposed to measure the breathing oxygen concentration on-board aircraft. the focs will monitor and control the output of the on-board oxygen generating system (obogs) so that oxygen concentrations remain within the desired limits. the focs will be designed so… More

A fiber optic chemical sensor (focs) is proposed for in-situ detection of hydrazine in water. in phase i, both fluorescence and absorbance technique will be used to obtain a prototype working sensor. in the first method, the fluorescence of yellow colored azine (excitation 466 nm; emission 546 nm)… More