Electrochemical Systems for Renewable Energy Conversion from Salinity and Proton Gradients

Morais, William G.; Lima, G. F.; Gomes, Wellington J. A. S.; Huguenin, Fritz

doi:10.21577/0103-5053.20180008

Cited by 7 publications

(5 citation statements)

References 66 publications

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“…Furthermore, PCA was coupled with linear discriminant analysis (LDA). First, PCA was used to reduce redundant information from the spectral data set, by describing each spectrum with a selected subset of PCs explaining 95% of cumulative variance; then, the reduced spectra were used as input variables for LDA (OriginPro 2018b, OriginLab Corporation) .…”

Section: Methodssupporting

confidence: 52%

Investigation of human pancreatic cancer tissues by Fourier Transform Infrared Hyperspectral Imaging

Notarstefano

Conti

Pisani

et al. 2019

Journal of Biophotonics

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Fourier-transform infrared hyperspectral imaging (FTIR-HSI) provides hyperspectral images containing both morphological and chemical information. It is widely applied in the biomedical field to detect tumor lesions, even at the early stage, by identifying specific spectral biomarkers. Pancreatic neoplasms present different prognoses and are not always easily classified by conventional analyses. In this study, tissue samples with diagnosis of pancreatic ductal adenocarcinoma and pancreatic neuroendocrine tumor were analyzed by FTIR-HSI and the spectral data compared with those from healthy and dysplastic samples. Multivariate/univariate approaches were complemented to hyperspectral images, and definite spectral markers of the different lesions identified. The malignant lesions were recognizable both from healthy/dysplastic pancreatic tissues (high values of phospholipids and triglycerides with shorter, more branched and less unsaturated alkyl chains) and between each other (different amounts of total lipids, phosphates and carbohydrates). These findings highlight different metabolic pathways characterizing the different samples, well detectable by FTIR-HSI. K E Y W O R D SFourier transform infrared hyperspectral imaging, multivariate analysis, pancreatic ductal adenocarcinoma, pancreatic neuroendocrine tumors, spectral biomarkers

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Section: Methodssupporting

confidence: 52%

Investigation of human pancreatic cancer tissues by Fourier Transform Infrared Hyperspectral Imaging

Notarstefano

Conti

Pisani

et al. 2019

Journal of Biophotonics

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“…In living organisms, life activities are proceed through collection, storage and release of energy. [ 1 ] For animals, energy comes mainly from food and oxygen supplied by environment. For plants, it comes from water, solar energy, and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

“Ion Pool” Structural Ion Storage Device: A New Strategy to Collect Ions by Nanoconfinement Effects

Wang

Chen

Jiang

et al. 2021

Small

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It is constructed by isolating body fluids into local areas through elaborate biofilms, and producing local osmotic potential energy by ion confinement effects. [3] Therefore, ion storage is a vital link in the process of energy transfer in living bodies. [4] Mimicking the ion storage process in organisms, an "ion pool" structural ion storage device was constructed, [5] which could harvest energy from external input power and converts it into ion concentration gradient by confinement effects of artificial nanochannels. [6] As shown in Figure 1a, the device was consisted of a microsized ions cavity and two small nanosized ions filters (ion valves). Just like biofilms, the two nanosized ion valves with opposite surface charges could select counterions and control the bulk ions into the microsized reservoir driven by external input energy. [7][8][9] With local confinement effects, [10] the ion concentration gradient was isolated within the reservoir of "ion pool" structures and difficult to be disturbed by bulk solution. Defined the positive voltage direction was from the left to the right. At forward bias, the external voltage drives the bulk ions filled into the cavity (Figure 1b), the anions or cations were attracted by valves surface charges and formed ion enrichment concentration, which performed high conductance. While at reversed bias, the external voltage drives the cavity ions escaped to the bulk (Figure 1c), the anions or cations would be pulled away by valves surface charges and formed ion depletion concentration, which performed low conductance. [11] The conductance difference at opposite voltage could result in asymmetric I-V curves of the system, which was considered as rectification property. Therefore, rectification property was investigated to evaluate the ion enrichment or depletion behavior within "ion pool" structural device. [12,13] When the nanofluidic device harvest external power and achieved large salinity gradient, it would performed high rectification ratio (current ratio of the I-V curve at opposite bias).According to this assumption, Poisson-Nernst-Planck (PNP) equations were adopted to numerical simulated the ion enrichment and depletion behavior in "ion pool" structural device and compared it with conventional bipolar nanochannels. [14][15][16][17] Ions concentration distribution within nanochannels was quantitatively analyzed. With the confinement effects within the cavity, the bulk ions could be sufficiently collected or depleted in the "ion pool." [18][19][20] By optimizing the surface charge density and geometric structure, ultrahigh rectification ratio of 19 475.81 was Ion storage structure widely exists in organisms, which is used to harvesting energy in environment and converting it into ion concentration gradient to maintain complex life activities. The construction of ion storage structures relies on isolating the biological body fluids by biofilm systems, which can also be regarded as local ions confinement. Mimicking this ions storage process, an "ion pool" structural ion st...

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“…In this sense, our group has investigated electrochemical systems to generate electrical energy from the variation in proton and alkali metal cation (sodium and potassium ions) concentrations in the course acid solution neutralization [9,10]. A possible practical application of these systems would be generating electrical energy from acidic wastewater.…”

Section: Introductionmentioning

confidence: 99%

Energy harvesting in the course of acid solution neutralization

Ferreira

Rueda-García

Gómez‐Romero

et al. 2022

Journal of Electroanalytical Chemistry

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Electrochemical Systems for Renewable Energy Conversion from Salinity and Proton Gradients

Cited by 7 publications

References 66 publications

Investigation of human pancreatic cancer tissues by Fourier Transform Infrared Hyperspectral Imaging

Investigation of human pancreatic cancer tissues by Fourier Transform Infrared Hyperspectral Imaging

“Ion Pool” Structural Ion Storage Device: A New Strategy to Collect Ions by Nanoconfinement Effects

Energy harvesting in the course of acid solution neutralization

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