Authors:Á. Nagy, Z. Kovács, D. Szöllösi and A. Fekete
The potentiometric electronic tongue is a new and rapidly developing technique. However, the description of the exact working mechanism is still absent. An important part of this description is the effect of the sample temperature on the measurement results. The paper reported here gives a description of the effect of temperature on results obtained with an α-Astree potentiometric electronic tongue. The yielded model was used to perform a temperature correction as if the samples were measured at room temperature (25 °c).
Authors:J. Mano, S. Lanceros-Méndez, A. Nunes and M. Dionísio
Dielectric experiments are often performed in non-isothermal conditions. Thus, there is a difference between the temperature of the sample and the sensor temperature. In this work we propose and compare three temperature calibration methods based on the detection of transitions or relaxations: i) the melting of high-purity metallic standards (indium and tin), ii) the 2nd order phase transition of a ferroelectric crystal (TGS); iii) the -relaxation of an amorphous polymer (poly(carbonate)). The results obtained from the three different methods were used to construct a calibration curve for a given heating rate.
Authors:S. Nikitina, V. Aleksandruk, A. Stepanov, A. Babaev and E. Preobrazhenskaya
Measurement of lifetime along with measurement of intensity allow to determine both uranium and plutonium concentrations. If exciting light absorption is taken into account and temperature correction is introduced the intensity of uranyl limunescence extrapolated to zero time is a function of uranium and the ratior0/r-a function of plutonium concentration. Stadi of characteristics of uranyl luminescence was performed using a spectrometer interfased with a microcomputer. Luminescence was excited by nitrogen laser.
This research has demonstrated that the dielectric method can be used successfully for grain moisture measurements for diverse
grain types over wide ranges of temperatures if the grain moisture content is below certain (grain-specific) threshold values.
These high-moisture limits were estimated. Optimum temperature correction coefficients for 149 MHz moisture measurements were
determined for grain samples at different moisture levels. This information should be very helpful for grain moisture meter
manufacturers and for moisture meter users who need to determine grain moisture contents at temperature extremes to be able
to market grain more efficiently.
The Unified Grain Moisture Algorithm is
capable of improved accuracy and allows the combination of many grain types
into a single “unified calibration”. The purposes of this research were to
establish processes for determining unifying parameters from the chemical and
physical properties of grains. The data used in this research were obtained as
part of the United States Department of Agriculture-Grain Inspection, Packers
and Stockyards Administration's Annual Moisture Calibration Study. More than
5,000 grain samples were tested with a Hewlett-Packard 4291A Material/Impedance
Analyzer. Temperature tests were done with a Very High Frequency prototype
system at Corvinus University of Budapest. Typical chemical and physical
parameters for each of the major grain types were obtained from the literature.
Data were analyzed by multivariate chemometric methods. One of the most
important unifying parameters (Slope) and the temperature correction
coefficient were successfully modeled. The Offset and Translation unifying
parameters were not modeled successfully, but these parameters can be estimated
relatively easily through limited grain tests.
software. A pure iridium metal standard was used to determine a temperature-correction factor which was used for all runs.
Pyrolysis combustion flow calorimetry
PCFC was performed using a Govmark microscale combustion
Authors:Cornelia Marinescu, Ancuta Sofronia, Cristina Rusti, Roxana Piticescu, Viorel Badilita, Eugeniu Vasile, Radu Baies and Speranta Tanasescu
Au), were used for temperaturecorrection and energy calibration.
Heat capacities were determined by performing three consecutive experiments in identical conditions, namely the same heating rate (10 °C/min), same gas flow, Ar, at a rate of
Authors:Abolfazl Shiroudi, Ehsan Zahedi and Reza Zabihi
ZPVE and temperaturecorrections between the TS and the corresponding reactant, respectively [ 22 ]. Comparison with experimental values shows better agreement at the MPW1PW91/6-31++G** level of theory. A NICS study and NBO [ 23 ] analysis were also
Authors:Geert Vanden Poel, Daniel Istrate, Agnieszka Magon and Vincent Mathot
temperaturecorrections for thermal lag in case of heating experiments as function of sample mass and scan rate should be established. Both items facilitate making of the right choices before doing the actual measurement instead of just correcting afterwards