“…This is different with the obtained result from [16], which shows its inversely proportional relation to the glucose concentration in blood. However, it agrees with result obtained by [17][18], which uses the same solution. Based on this results, it can be proved that the method can be used to measure the glucose or sweetness molecules by using the impedance method due to its dielectric properties.…”
This paper presents fruit sweetness characterization using impedance spectroscopy method. Agricultural product processing requires technology implementation to increase its production. The fruit sweetness component is composed of a mixture of fructose, glucose, and sucrose. The measurements of these molecules are usually done with a four-point probe and use DC (direct current). In this study, a fruit sweetness characterization using impedance spectroscopy method has been developed, which uses an AC (alternating current). By using this method, the fruit sweetness level can be characterized based on the impedance measurement on the flesh of fruit. The obtained characterization results show the fruit sweetness level; it can be measured by the impedance measurement. This method could characterize the fruit sweetness well and agrees with the calibration result.
“…This is different with the obtained result from [16], which shows its inversely proportional relation to the glucose concentration in blood. However, it agrees with result obtained by [17][18], which uses the same solution. Based on this results, it can be proved that the method can be used to measure the glucose or sweetness molecules by using the impedance method due to its dielectric properties.…”
This paper presents fruit sweetness characterization using impedance spectroscopy method. Agricultural product processing requires technology implementation to increase its production. The fruit sweetness component is composed of a mixture of fructose, glucose, and sucrose. The measurements of these molecules are usually done with a four-point probe and use DC (direct current). In this study, a fruit sweetness characterization using impedance spectroscopy method has been developed, which uses an AC (alternating current). By using this method, the fruit sweetness level can be characterized based on the impedance measurement on the flesh of fruit. The obtained characterization results show the fruit sweetness level; it can be measured by the impedance measurement. This method could characterize the fruit sweetness well and agrees with the calibration result.
“…Positive values of imaginary component of the impedance in high frequency domain (Fig. 6b) is connected with protons (1 mol L −1 H 2 SO 4 ) fast reacting to the electric field oscillations in the samples [57].…”
Highlights > A series of oxygen, nitrogen and phosphorus co-doped core-shell carbon sphere were developed. > The sample prepared at 800 °C with H 3 PO 4 activation showed the highest capacity and energy density. >The surface chemistry together with the well balanced porous structure of carbon electrode can greatly influence the electrochemical performance.
“…The bulk resistance of the systems is represented by minimums on isotherms, which appears when the temperature passes the glass transition temperature of the systems. The curves acquire the form of a finite (closed) Warburg diffusion impedance that describes the linear diffusion process in a homogeneous layer of finite thickness, i.e., the charge transfer through the bulk of the systems becomes ‘unfrozen’ [ 30 ]. Figure 5 Z ″/ Z ′ plots for the DEG/LiClO 4 systems.…”
In the present work, ion-conductive hybrid organic-inorganic polymers based on epoxy oligomer of diglycide aliphatic ester of polyethylene glycol (DEG) and lithium perchlorate (LiClO4) were synthesized. The effect of LiClO4 content on the electrophysical properties of epoxy polymers has been studied by differential scanning calorimetry (DSC) and broadband dielectric spectroscopy (BDS). The effect of LiClO4 content on the structure has been studied by wide-angle X-ray scattering (WAXS). It was found that LiClO4 impacts on the structure of the synthesized hybrid epoxy polymers, probably, by formation of coordinative complexes {ether oxygen-lithium cations-ether oxygen} as evidenced from a significant increase in their glass transition temperatures with increasing LiClO4 concentration and WAXS studies. The presence of ether oxygen in DEG macromolecules provides a transfer mechanism of the lithium cations with the ether oxygen similar to polyethylene oxide (PEO). Thus, the obtained hybrid polymers have high values of ionic conductivity σ' (approximately 10−3 S/cm) and permittivity ϵ' (6 × 105) at elevated temperatures (200°С). On the other hand, DEG has higher heat resistance compared to PEO that makes these systems perspective as solid polymer electrolytes able to operate at high temperature.PACS81.07.Pr; 62.23.St; 66.30.hk
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