Real-time in-situ determination of free Cu(II) at picomolar levels in sea water using a fluorescence lifetime-based fiber optic biosensor

2002 ◽  
Author(s):  
Richard B. Thompson ◽  
Hui-Hui Zeng ◽  
Carol A. Fierke ◽  
Gary Fones ◽  
James W. Moffett
Keyword(s):  
Real Time ◽  
Fluorescence Lifetime ◽  
Fiber Optic ◽  
Sea Water

Precise Determination of Percent Cure of Epoxide Polymers and Composites via Fiber-Optic Raman Spectroscopy and Multivariate Analysis

1997 ◽  
Vol 51 (2) ◽  
pp. 247-252 ◽  
Author(s):  
Jeffrey F. Aust ◽  
Karl S. Booksh ◽  
Christopher M. Stellman ◽  
Richard S. Parnas ◽  
Michael L. Myrick
Keyword(s):  
Raman Spectroscopy ◽  
Multivariate Analysis ◽  
Real Time ◽  
Fiber Optic ◽  
Precise Determination ◽  
Probe Design ◽  
Epoxide Polymers ◽  
Time Determination

A method for real-time determination of the percent cure of epoxies via in situ fiber-optic Raman spectroscopy has been developed. This method utilizes a probe design developed for real-time monitoring of polymer curing and multivariate analysis to interpret the data and determine percent cure. This method was demonstrated to be reliable to ±0.54% of cure in laboratory samples over a 50–99% cure range. A preliminary study measuring cure percentage in an industrial, glass-reinforced composite has been shown to be reliable to ±0.82% in the 40–90% cure range.

Real-Time Analysis Of In-Situ Spectroscopic Ellipsometric Data During Mbe Growth Of III-V Semiconductors

1991 ◽  
Vol 222 ◽  
Author(s):  
B. Johs ◽  
J. L. Edwards ◽  
K. T. Shiralagi ◽  
R. Droopad ◽  
K. Y. Choi ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Constants ◽  
Growth Parameters ◽  
Ex Situ ◽  
Time Analysis ◽  
Mbe Growth ◽  
In Situ Data ◽  
Real Time Analysis

ABSTRACTA modular spectroscopic ellipsometer, capable of both in-situ and ex-situ operation, has been used to measure important growth parameters of GaAs/AIGaAs structures. The ex-situ measurements provided layer thicknesses and compositions of the grown structures. In-situ ellipsometric measurements allowed the determination of growth rates, layer thicknesses, and high temperature optical constants. By performing a regression analysis of the in-situ data in real-time, the thickness and composition of an AIGaAs layer were extracted during the MBE growth of the structure.

scholarly journals Determination of 137Cs in Sea Water Samples Using Gamma Spectrometry

2020 ◽  
Vol 13 ◽  
pp. 247
Author(s):  
N. Evaggeliou ◽  
Ch. Lykomitrou ◽  
A. Zafiropoulou
Keyword(s):  
Gamma Spectrometry ◽  
Comparative Evaluation ◽  
Sea Water ◽  
Germanium Detector ◽  
Advantages And Disadvantages ◽  
High Purity Germanium ◽  
Co Precipitation ◽  
Radioanalytical Procedures

In the present study a comparative evaluation of two methods for 137Cs determination (pretreatment for gamma spectrometry) is attempted. One of them is the conventional AMP (ammonium molybdophosphate, (ΝΗ4)3Ρ(Μo3O10)4) method (radiochemical treatment based on coprecipitation) and the other one is a method based on pre-concentration of cesium in situ by using the Mark III Centrifugal Pump. The pump, which is described analytically in the study, is composed of a mo­tor (pump), four cartridge housings (containing the scavengers), a flow meter and a pressure tube (containing the battery pack and the timer board). For justification, this method is compared with the AMP co-precipitation one. Following up the radioanalytical procedures, the gamma spectrometry system (relative efficiency of high purity germanium detector 90%) is also demonstrated, as conformed to mea­ suring obtained parameters. Finally, the advantages and disadvantages of these two methods are recorded and the application of each one is suggested.

Fiber Optic Sensor Development for Real-Time In-Situ Epoxy Cure Monitoring

1997 ◽  
Vol 31 (1) ◽  
pp. 87-102 ◽  
Author(s):  
Y. M. Liu ◽  
C. Ganesh ◽  
J. P. H. Steele ◽  
J. E. Jones
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Development ◽  
Cure Monitoring ◽  
Optic Sensor

Emerging fiber optic endomicroscopy technologies towards noninvasive real-time visualization of histology in situ

2010 ◽  
Author(s):  
Jiefeng Xi ◽  
Yuying Zhang ◽  
Li Huo ◽  
Yongping Chen ◽  
Toufic Jabbour ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
Real Time Visualization

scholarly journals A new type of fiber-optic-based interferometric ellipsometer for in situ and real-time measurements

2003 ◽  
Vol 74 (10) ◽  
pp. 4442-4447 ◽  
Author(s):  
S. Topcu ◽  
L. Chassagne ◽  
Y. Alayli
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
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