Characterization of sun-injury and prediction of sunscald on ‘Packham’s Triumph’ pears using Vis-NIR spectroscopy

Optical absorption spectroscopy provides evidence for individually dispersed carbon nanotubes. A common method to disperse SWCNTs into aqueous solution is to sonicate the mixture in the presence of a double-stranded DNA (dsDNA). In this paper, optical characterization of dsDNA-wrapped HiPco carbon nanotubes (dsDNA-SWCNT) was carried out using near infrared (NIR) spectroscopy and photoluminescence (PL) experiments. The findings suggest that SWCNT dispersion is very good in the environment of DNA existing. Additionally, its dispersion depends on dsDNA concentration.

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Structural and Optical Characterization of Zinc Telluride Thin Films

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.665.254 ◽

2013 ◽

Vol 665 ◽

pp. 254-262 ◽

Cited By ~ 2

Author(s):

J.R. Rathod ◽

Haresh S. Patel ◽

K.D. Patel ◽

V.M. Pathak

Keyword(s):

Thin Films ◽

Extinction Coefficient ◽

Nir Spectroscopy ◽

Optical Characterization ◽

X Ray Diffraction ◽

X Ray ◽

Evaporation Technique ◽

Film Form ◽

Znte Thin Films

Group II-VI compounds have been investigated largely in last two decades due to their interesting optoelectronic properties. ZnTe, a member of this family, possesses a bandgap around 2.26eV. This material is now a day investigated in thin film form due to its potential towards various viable applications. In this paper, the authors report their investigations on the preparation of ZnTe thin films using vacuum evaporation technique and their structural and optical characterizations. The structural characterization, carried out using an X-ray diffraction (XRD) technique shows that ZnTe used in present case possesses a cubic structure. Using the same data, the micro strain and dislocation density were evaluated and found to be around 1.465×10-3lines-m2and 1.639×1015lines/m2respecctively. The optical characterization carried out in UV-VIS-NIR region reveals the fact that band gap of ZnTe is around 2.2eV in present case. In addition to this, it was observed that the value of bandgap decreases as the thickness of films increases. The direct transitions of the carries are involved in ZnTe. Using the data of UV-VIS-NIR spectroscopy, the transmission coefficient and extinction coefficient were also calculated for ZnTe thin films. Besides, the variation of extinction coefficient with wavelength has also been discussed here.

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Application on-line NIR spectroscopy and other process analytical technology tools to the characterization of soy sauce desalting by electrodialysis

Journal of Food Engineering ◽

10.1016/j.jfoodeng.2019.06.022 ◽

2019 ◽

Vol 263 ◽

pp. 243-252 ◽

Cited By ~ 4

Author(s):

Roberto Moscetti ◽

Riccardo Massantini ◽

Marcello Fidaleo

Keyword(s):

Process Analytical Technology ◽

Nir Spectroscopy ◽

Soy Sauce ◽

Technology Tools ◽

On Line ◽

Analytical Technology

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Quantitative Characterization of Arnicae flos by RP-HPLC-UV and NIR Spectroscopy

Foods ◽

10.3390/foods8010009 ◽

2018 ◽

Vol 8 (1) ◽

pp. 9

Author(s):

Daniela Ivanova ◽

Vera Deneva ◽

Dimitrina Zheleva-Dimitrova ◽

Vesela Balabanova-Bozushka ◽

Daniela Nedeltcheva ◽

...

Keyword(s):

Near Infrared ◽

Signal To Noise Ratio ◽

Sesquiterpene Lactones ◽

Nir Spectroscopy ◽

Spectral Distortion ◽

Active Components ◽

Quantitative Characterization ◽

Convolution Window ◽

Spectra Processing

The possibility of applying near-infrared (NIR) spectroscopy to monitor 13 active components (phenolic acids, flavonoids, and sesquiterpene lactones) in Arnicae flos was studied. The preprocessing of the spectra were performed by using the conventional Golay-Savitzky procedure and the newly developed step-by-step filter. The results obtained show that the step-by-step filter derivatives provide a better signal-to-noise ratio at a lower convolution window. Better calibration for the content of protocatechuic acid, chlorogenic acid, caffeic acid, p-cumaric acid, ferulic acid, isoquercitrin, and quercetin were obtained by step-by-step filter derivatives, compared to the direct raw spectra processing and the Golay-Savitzky approach. Although the step-by-step filter substantially reduces the spectral distortion, the convolution procedure leads to loss of spectral points in the red end of the spectral curve. Probably for this reason this approach shows better calibration only in seven of the monitored 13 active components.

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Characterization of Edible Oils Using NIR Spectroscopy and Chemometric Methods

Advances in Intelligent Systems and Computing - Intelligent Systems Design and Applications ◽

10.1007/978-3-030-16660-1_29 ◽

2019 ◽

pp. 292-300

Author(s):

Rishi Ranjan ◽

Navjot Kumar ◽

A. Hepsiba Kiranmayee ◽

P. C. Panchariya

Keyword(s):

Edible Oils ◽

Nir Spectroscopy ◽

Chemometric Methods

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Synthesis and characterization of μ-hydroxido- and μ-polycarboxylato-bridged iron(III) complexes with 2,2’-bipyridine

Journal of the Serbian Chemical Society ◽

10.2298/jsc131028005t ◽

2014 ◽

Vol 79 (8) ◽

pp. 941-952

Author(s):

Nikola Tasic ◽

Jelena Rogan ◽

Dejan Poleti ◽

Lidija Radovanovic ◽

Goran Brankovic

Keyword(s):

Ligand Exchange ◽

Diffuse Reflectance ◽

Nir Spectroscopy ◽

Octahedral Geometry ◽

Distorted Octahedral Geometry ◽

Dsc Analysis ◽

Ligand Exchange Reaction ◽

Distorted Octahedral ◽

Structural Formulae

Four novel polymeric iron(III) complexes with 2,2?-bipyridine (bipy) and different aromatic polycarboxylato ligands as anions of phthalic (pht), isophthalic (ipht), terephthalic (tpht) and pyromellitic (pyr) acid were synthesized by ligand exchange reaction. The complexes were characterized by elemental and TG/DSC analysis, FTIR and diffuse reflectance UV-VIS-NIR spectroscopy and magnetic susceptibility measurements. Based on analytical and spectral data the formulae of the complexes are {[Fe4(bipy)2 (H2O)2(OH)6(pht)3]?2H2O}n (1), {[Fe4(bipy)2(Hipht)2(ipht)2(OH)6]?4H2O}n (2), {[Fe4(bipy)2(Htpht)2(OH)6(tpht)2]?4H2O}n (3) and {[Fe4(bipy)(H2O)8(OH)4 (pyr)2]?H2O}n (4). All complexes are red brown and low-spin with a distorted octahedral geometry and FeO6 or FeN2O4 chromophore. Polycarboxylato ligands have a bridging role in all cases, whereas monodentate COO groups are present in 2 and 3, bridging and chelate COO groups are established in 1 and 4. The thermal behaviour of 1-4 was investigated in detail and the molar dehydration enthalpies were calculated. According to the all those results, the structural formulae of the complexes 1-4 were proposed.

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Reflectance Vis/NIR spectroscopy for nondestructive taste characterization of Valencia oranges

Computers and Electronics in Agriculture ◽

10.1016/j.compag.2012.03.008 ◽

2012 ◽

Vol 85 ◽

pp. 64-69 ◽

Cited By ~ 69

Author(s):

Bahareh Jamshidi ◽

Saeid Minaei ◽

Ezzedin Mohajerani ◽

Hassan Ghassemian

Keyword(s):

Nir Spectroscopy

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New Chromium-Calcium Titanate Red Ceramic Pigment

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.68.208 ◽

2010 ◽

Vol 68 ◽

pp. 208-212 ◽

Cited By ~ 12

Author(s):

Carina Gargori ◽

Roberto Galindo ◽

Mario Llusar ◽

Sara Cerro ◽

Araceli García ◽

...

Keyword(s):

Solid Solution ◽

Nir Spectroscopy ◽

Ceramic Pigment ◽

Calcium Titanate ◽

Synthesis And Characterization ◽

Brown Pigment ◽

Ceramic Tiles ◽

Flux Agent ◽

Soaking Time

synthesis and characterization of a new chromium- calcium titanate red ceramic pigment is described in this communication. The pigment is based on the solid solution of chromium (IV) in calcium titanate and was characterized as red-brown pigment in a CaO-ZnO-SiO2 transparent glaze used for ceramic tiles (1080°C). XRD, UV-Vis-NIR spectroscopy and CIE-L*a*b* techniques of characterization have been employed. The L*a*b* valour of the optimal pigment with 0,015 mol/mol of chromium fired at 1100°C with a soaking time of 3 hours and 5% weight added to the transparent glaze is 59.3/12.5/9.5. Likewise 5%w. addition of NHCl used as flux agent increase b* and decrease L* valour (L*a*b*=45.2/15.3/5.3).

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