Proposal of AAA-battery-size one-shot ATR Fourier spectroscopic imager for on-site analysis: Simultaneous measurement of multi-components with high accuracy

2015 ◽  
Author(s):  
Satsuki Hosono ◽  
Wei Qi ◽  
Shun Sato ◽  
Yo Suzuki ◽  
Masaru Fujiwara ◽  
...  
Keyword(s):  
Simultaneous Measurement ◽  
High Accuracy ◽  
Site Analysis

Simultaneous measurement of two major prostacyclin metabolites in urine

1990 ◽  
Vol 36 (11) ◽  
pp. 1978-1980 ◽  
Author(s):  
S Zureick ◽  
J Nadler ◽  
J Yamamoto ◽  
R Horton
Keyword(s):  
Angiotensin Ii ◽  
Blood Vessels ◽  
Simultaneous Measurement ◽  
Healthy Subjects ◽  
High Accuracy ◽  
High Concentration ◽  
Accuracy And Precision ◽  
Overall Evaluation ◽  
Excretion Rates ◽  
Apparently Healthy

Abstract We describe a combined HPLC-RIA technique to measure both major metabolites of prostacyclin (PGI2): 6-keto PGF1 alpha and 2,3-dinor-6 keto PGF1 alpha. The measurement of the former, which originates from renal blood vessels, and the latter, from systemic vessels and the liver, may provide a better overall evaluation of production than measurement of one metabolite. An aliquot of acidified urine with added 3H-labeled metabolites is adsorbed and then eluted from a C18 Bond-Elut column. The sample is then passed through an HPLC system by use of an isocratic solvent combination that separates the two metabolites from known prostaglandins. The purified metabolites are then quantified by RIA. Using a logit-log10 transform, one can measure between 12 and 250 pg of either metabolite, with high accuracy and precision (CVs of 12% for a low concentration and 7% for a high concentration). Reference values for apparently healthy subjects were, respectively, 107 (SD 45) and 171 (SD 69) ng/g creatinine for 6-keto PGF1 alpha and the dinor metabolite in men (n = 18) and 45 (SD 22) and 141 (SD 28) ng/g creatinine, respectively, in women (n = 15). Indomethacin in standard doses reduced both metabolite values by 50%. Intravenous administration of angiotensin II (5 ng/kg of body wt per minute) did not alter excretion rates, but equipressor doses of norepinephrine (0.1 microgram/kg per minute) increased the production of both metabolites (6-keto greater than dinor).

Digitalization of High Accuracy Thermo-Anemometer for Heat Flux Measurement in Stratified Flow

2011 ◽  
Author(s):  
Shunichi Sanae ◽  
Katsuhisa Ohba
Keyword(s):  
Heat Flux ◽  
Temperature Dependence ◽  
Simultaneous Measurement ◽  
Temperature Compensation ◽  
Flux Measurement ◽  
Stratified Flow ◽  
High Accuracy ◽  
Velocity Measurements ◽  
First Order ◽  
Field Programmable

In this study, the high-accuracy thermo-anemometer was developed to execute simultaneous measurement of temperature and velocity by employing Field Programmable Gate Array (FPGA) devices. A cold-wire temperature sensor has first-order lags due to thermal time constants, that means that a phase compensation is essential to measure temperature fluctuations with high frequency. The digital filter comprised the exact first-order lead characteristics was realized by the bilinear s-z transformation. It was verified that the temperature signals were appropriately compensated with an uncertainty of less than ±3.9% in frequency up to 10 kHz. For velocity measurements, a temperature compensation is indispensable owing to velocity and temperature dependence of response of a hot-wire anemometer in thermally stratified flow fields. The accuracy of the velocity measurements at high temperature was improved with the strict algorithm of the temperature compensation calculation incorporating the temperature dependence of the thermal properties of the air. The high-accuracy velocity measurement was realized within the accuracy of ±1.6% in the temperature range of 1.5 times as wide as that of the previous analog based system. The simultaneous measurement system for temperature and velocity was applicable to measure heat flux in thermally stratified flows.

Applications of Four-Channel Raman Difference Spectroscopy

1981 ◽  
Vol 35 (4) ◽  
pp. 428-432 ◽  
Author(s):  
Jaan Laane ◽  
Wolfgang Kiefer
Keyword(s):  
Raman Spectra ◽  
Carbon Disulfide ◽  
Simultaneous Measurement ◽  
Photon Counting ◽  
High Accuracy ◽  
Difference Spectroscopy ◽  
Difference Spectra ◽  
Counting System ◽  
Frequency Shifts ◽  
Very High

A four-channel photon counting system has been constructed for the measurement of Raman difference spectra. In this work we will describe the applications and advantages of such a system. Specifically, the simultaneous measurement of the parallel and perpendicular polarized compounds of the Raman spectra of both benzene and a mixture of benzene and benzene-d6 will be discussed. Spectra of two different mixtures of benzene and carbon disulfide and of the pure components were also recorded simultaneously using the four separate channels of the photon counting system. For both sets of data the solvent-induced frequency shifts were determined with very high accuracy.

scholarly journals High-accuracy simultaneous measurement of particle size and location using interferometric out-of-focus imaging

2016 ◽  
Vol 24 (15) ◽  
pp. 16530 ◽  
Author(s):  
Lu Qieni ◽  
Han Kan ◽  
Ge Baozhen ◽  
Wang Xiang
Keyword(s):  
Particle Size ◽  
Simultaneous Measurement ◽  
High Accuracy

Temperature-dependent optical rotatory power in the presence of birefringence of KTA and KTP crystals by the high-accuracy universal polarimeter method at 632.8 nm wavelength

2014 ◽  
Vol 47 (2) ◽  
pp. 566-574 ◽  
Author(s):  
C. Hernández-Rodríguez ◽  
A. B. Fragoso-López ◽  
J. Herreros-Cedrés ◽  
R. Guerrero-Lemus
Keyword(s):  
Simultaneous Measurement ◽  
Rotatory Power ◽  
High Accuracy ◽  
Potassium Titanyl Phosphate ◽  
Optical Rotatory ◽  
Thermal Variation ◽  
Temperature Dependent ◽  
Parabolic Form ◽  
Orthorhombic Crystals ◽  
Optical Rotatory Power

Temperature-dependent simultaneous measurement of birefringence and optical rotatory power (ORP) for orthorhombic crystals of potassium titanyl phosphate (KTP) and potassium titanyl arsenate (KTA) has been achieved by using the high-accuracy universal polarimeter method at 632.8 nm wavelength. The birefringence and ORP changes along the (110) planes for KTA and KTP crystals were found to have a nearly parabolic form for the temperature range 297–493 K. The thermal variation coefficients were found to be 0.9 (5) × 10−5 K−1and 5.6 (3) × 10−8 K−2for KTA and 0.9 (5) × 10−5K−1and 5.7 (3) × 10−8 K−2for KTP. The ORPs at 297 K were found to be 20.0 (20) and 20.5 (15)° mm−1for KTA and KTP, respectively. The thermal variation coefficients of the ORP were found to be 1.8 (2) × 10−3° mm−1 K−1and 1.1 (1) × 10–5° mm−1 K−2for KTA and 1.9 (2) × 10−3° mm−1 K−1and 1.2 (1) × 10−5° mm−1 K−2for KTP.

A New 1,000 kV Electron Microscope

1967 ◽  
Vol 25 ◽  
pp. 260-261
Author(s):  
M. Nishigaki ◽  
S. Katagiri ◽  
H. Kimura ◽  
B. Tadano
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Basic Research ◽  
Chromatic Aberration ◽  
High Accuracy ◽  
Biological Specimen ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
High Voltage Electron

The high voltage electron microscope has many advantageous features in comparison with the ordinary electron microscope. They are a higher penetrating efficiency of the electron, low chromatic aberration, high accuracy of the selected area diffraction and so on. Thus, the high voltage electron microscope becomes an indispensable instrument for the metallurgical, polymer and biological specimen studies. The application of the instrument involves today not only basic research but routine survey in the various fields. Particularly for the latter purpose, the performance, maintenance and reliability of the microscope should be same as those of commercial ones. The authors completed a 500 kV electron microscope in 1964 and a 1,000 kV one in 1966 taking these points into consideration. The construction of our 1,000 kV electron microscope is described below.

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