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1. Application of near-infrared spectroscopy for screening the potato flour content in Chinese steamed bread

Author:
Wang, Hui; Lv, Du; Dong, Nan; Wang, Sijie; Liu, Jia
Source:
Food science and biotechnology 2019 v.28 no.4 pp. 955-963
ISSN:
1226-7708
Subject:
near-infrared spectroscopy,   etc   ; breads; chemometrics; least squares; potato flour; screening;     Show all 6 Subjects
Abstract:
... Near-infrared (NIR) spectroscopy combined with chemometrics was used as a technique to predict the potato flour content in Chinese steamed bread (CSB). The inner core of CSB was chosen as the measuring position for acquiring the NIR spectra. Spectra between 4000 and 10,000 cm⁻¹ were analysed using a partial least-squares regression. The coefficient of determination (R CV²) and the root mean square ...
DOI:
10.1007/s10068-018-00552-x

2. Bi³⁺ doped 2D Ruddlesden–Popper organic lead halide perovskites

Author:
Lyu, Feiyi; Zheng, Xiaoqi; Wang, Yingqiao; Shi, Ruowen; Yang, Jianli; Li, Ziyue; Yu, Jiase; Lin, Bo-Lin
Source:
Journal of materials chemistry A 2019 v.7 no.26 pp. 15627-15632
ISSN:
2050-7496
Subject:
near-infrared spectroscopy,   etc   ; bismuth; engineering; fluorescence microscopy; photostability;     Show all 5 Subjects
Abstract:
... Two-dimensional Ruddlesden–Popper organic lead halide perovskites (2D RPPs) are semiconducting materials that have attracted widespread research attention recently. Fundamental understanding of heterovalent doping, a classical strategy to manipulate semiconductors′ optoelectronic and stability properties, is of great significance for their applications. Here we report the first series of heteroval ...
DOI:
10.1039/c9ta04145a

3. Synthesis and Near-Infrared Emission of Yb-Doped Cs₂AgInCl₆ Double Perovskite Microcrystals and Nanocrystals

Author:
Mahor, Yogesh; Mir, Wasim J.; Nag, Angshuman
Source:
Journal of physical chemistry 2019 v.123 no.25 pp. 15787-15793
ISSN:
1932-7455
Subject:
near-infrared spectroscopy,   etc   ; electrons; nanocrystals; physical chemistry; ytterbium;     Show all 5 Subjects
Abstract:
... Cs₂AgInCl₆ double perovskite (DP) is a direct band gap, stable, and environmentally benign material with a three-dimensional perovskite structure. However, the band gap (∼3.3 eV) is too wide for optoelectronic applications in the near-infrared (NIR) region. To achieve optical functionality in the NIR window, we have doped Yb³⁺ in both microcrystals and colloidal nanocrystals of Cs₂AgInCl₆ DPs. Our ...
DOI:
10.1021/acs.jpcc.9b02456

4. A fused-ring non-fullerene acceptor based on a benzo[1,2-b:4,5-b′]dithiophene central core with a thieno[3,2-b]thiophene side-chain for highly efficient organic solar cells

Author:
Jia, Yu; Zhang, Yun; Jiang, Wei; Su, Bin; Liu, Chunbo; Zhu, Enwei; Che, Guangbo
Source:
Journal of materials chemistry A 2019 v.7 no.18 pp. 10905-10911
ISSN:
2050-7496
Subject:
near-infrared spectroscopy,   etc   ; absorption; dissociation; fluorine; solar cells; thiophene;     Show all 6 Subjects
Abstract:
... A new electron-rich central core (BTT) based on benzo[1,2-b:4,5-b′]dithiophene with a thio[3,2-b]thiophene side chain was coupled with methyl and fluorine-modified 1,1-dicyanomethylene-3-indanone (IC) electron-withdrawing end groups to furnish two novel non-fullerene acceptors (NFAs), namely BTT-MIC and BTT-FIC. Compared to BTT-MIC, BTT-FIC exhibits a stronger near-infrared (NIR) absorption with a ...
DOI:
10.1039/c9ta01888c

5. Stable Sn²⁺ doped FAPbI₃ nanocrystals for near-infrared LEDs

Author:
Begum, Raihana; Chin, Xin Yu; Li, Mingjie; Damodaran, Bahulayan; Sum, Tze Chien; Mhaisalkar, Subodh; Mathews, Nripan
Source:
Chemical communications 2019 v.55 no.38 pp. 5451-5454
ISSN:
1364-548X
Subject:
near-infrared spectroscopy,   etc   ; chemical reactions; nanocrystals; propionic acid; tin;     Show all 5 Subjects
Abstract:
... Herein, we report Sn²⁺ doping in FAPbI₃ NCs to stabilize the α-phase, while using propionic acid as a co-ligand. The Sn²⁺ doping enhances the emission quantum yield from 35% to 63% and dramatically improves the colloidal and phase stability. Also, we demonstrated the use of Sn doped FAPbI₃ NCs in near-infrared (NIR) LEDs. ...
DOI:
10.1039/c9cc01526d

6. Determination of the geographical origin of green coffee beans using NIR spectroscopy and multivariate data analysis

Author:
Giraudo, A.; Grassi, S.; Savorani, F.; Gavoci, G.; Casiraghi, E.; Geobaldo, F.
Source:
Food control 2019 v.99 pp. 137-145
ISSN:
0956-7135
Subject:
near-infrared spectroscopy,   etc   ; coffee beans; models; multivariate analysis; prediction; provenance;     Show all 6 Subjects
Abstract:
... In this work, near infrared (NIR) spectroscopy and multivariate data analysis were investigated as a fast and non-disruptive method to classify green coffee beans on continents and countries bases. FT-NIR spectra of 191 coffee samples, origin from 2 continents and 9 countries, were acquired by two different laboratories.Laboratory-independent Partial Least Square-Discriminant Analysis and interval ...
DOI:
10.1016/j.foodcont.2018.12.033

7. An overview of variable selection methods in multivariate analysis of near-infrared spectra

Author:
Yun, Yong-Huan; Li, Hong-Dong; Deng, Bai-Chuan; Cao, Dong-Sheng
Source:
Trends in analytical chemistry 2019 v.113 pp. 102-115
ISSN:
0165-9936
Subject:
near-infrared spectroscopy,   etc   ; instrumentation; multivariate analysis; prediction; selection methods; wavelengths;     Show all 6 Subjects
Abstract:
... With the advances in innovative instrumentation and various valuable applications, near-infrared (NIR) spectroscopy has become a mature analytical technique in various fields. Variable (wavelength) selection is a critical step in multivariate calibration of NIR spectra, which can improve the prediction performance, make the calibration reliable and provide simpler interpretation. During the last s ...
DOI:
10.1016/j.trac.2019.01.018

8. Simple near-Infrared Nonfullerene Acceptors Enable Organic Solar Cells with >9% Efficiency

Author:
Wang, Kaili; Lv, Jie; Duan, Tainan; Li, Zhefeng; Yang, Qianguang; Fu, Jiehao; Meng, Wei; Xu, Tongle; Xiao, Zeyun; Kan, Zhipeng; Sun, Kuan; Lu, Shirong
Source:
ACS applied materials & interfaces 2019 v.11 no.7 pp. 6717-6723
ISSN:
1944-8252
Subject:
near-infrared spectroscopy,   etc   ; absorption; chlorides; polymers; solar cells; spectral analysis;     Show all 6 Subjects
Abstract:
... Nonfullerene acceptors (NFAs) based on calamitic-shaped small molecules are being developed rapidly to improve the photoelectron conversion efficiencies (PCEs) of organic solar cells. NFAs with light absorption extended to the near-infrared (NIR) region are of interest because they play a pivotal role in both organic tandem cells and semitransparent devices. In this work, two simple acceptor–donor ...
DOI:
10.1021/acsami.8b20567

9. Quantification of cell concentration in biofuel-important microalgae using hyperspectral reflectance and hyperspectral extinction coefficient

Author:
Zhou, Zhaoming; Zhou, Xiaobing; Apple, Martha E.; Miao, Jiaqing; Wyss, Gary; Spangler, Lee
Source:
International journal of remote sensing 2019 v.40 no.23 pp. 8764-8792
ISSN:
1366-5901
Subject:
near-infrared spectroscopy,   etc   ; algorithms; biomass production; cell division; microalgae; models; monitoring; radiative transfer; reflectance; remote sensing;     Show all 10 Subjects
Abstract:
... Monitoring of microalgae cell concentration during their growing phase is imperative to ensure efficiency in biomass production and to study the cell division kinetics since it impacts the penetration depth of the active light radiation and thus determines the thickness of the active growing layer. Conventionally, the cell concentration (number of cells per unit volume) of microalgal solutions is ...
DOI:
10.1080/01431161.2019.1620378

10. Assessment of macadamia kernel quality defects by means of near infrared spectroscopy (NIRS) and nuclear magnetic resonance (NMR)

Author:
Carvalho, Lívia Cirino de; Verbi Pereira, Fabíola Manhas; Morais, Camilo de Lelis Medeiros de; Lima, Kássio Michell Gomes de; Teixeira, Gustavo Henrique de Almeida
Source:
Food control 2019 v.106 pp. 106695
ISSN:
0956-7135
Subject:
near-infrared spectroscopy,   etc   ; Macadamia; chemometrics; discoloration; insects; nondestructive methods; nuclear magnetic resonance spectroscopy; rapid methods; seeds;     Show all 9 Subjects
Abstract:
... Macadamia kernels are visually sorted based on the presence of quality defects by specialized labors. However, this process is not as accurate as non-destructive methods such as near infrared spectroscopy (NIRS) and nuclear magnetic resonance (NMR). Thus, NIRS and NMR in combination with chemometrics have become established non-destructive method for rapid assessment of quality parameters in the f ...
DOI:
10.1016/j.foodcont.2019.06.021

11. Towards online Near-Infrared spectroscopy to optimise food product mixing

Author:
Barone, Angela; Glassey, Jarka; Montague, Gary
Source:
Journal of food engineering 2019 v.263 pp. 227-236
ISSN:
0260-8774
Subject:
near-infrared spectroscopy,   etc   ; fiber optics; foods; mixing; particle size distribution; standard deviation;     Show all 6 Subjects
Abstract:
... This paper advances the use of in-situ Near-Infrared (NIR) spectroscopy as the basis for an in-line control system to optimise mixing time of food powder blends. A non-contact NIR fibre-optic probe installed in a conical screw mixer was used to scan three powder mixtures characterised by different particle size distribution and component distribution. The current state of the art is extended by co ...
DOI:
10.1016/j.jfoodeng.2019.07.003

12. A novel mitochondria-targeted near-infrared (NIR) probe for detection of viscosity changes in living cell, zebra fishes and living mice

Author:
Guo, Rui; Ma, Yanyan; Tang, Yonghe; Xie, Peng; Wang, Qiuan; Lin, Weiying
Source:
Talanta 2019 v.204 pp. 868-874
ISSN:
0039-9140
Subject:
near-infrared spectroscopy,   etc   ; Danio rerio; enzymes; fluorescence; glycerol; methanol; mice; mitochondria; monitoring; proteins; viscosity;     Show all 11 Subjects
Abstract:
... Viscosity is a key factor that determines the diffusion-controlled processes in biological systems. The matrix of mitochondria contains various enzymes and other proteins with high density, and the diffusion of which are severely restricted by the cristae, making it the most crowded place in the cells. Herein, we reported a new near-infrared probe NV-1 with increased Stokes shift for monitoring vi ...
DOI:
10.1016/j.talanta.2019.06.050

13. A water-soluble near-infrared fluorescent probe for sensitive and selective detection of cysteine

Author:
Zhang, Shuwei; Wu, Dongdong; Wu, Juanjuan; Xia, Qianwen; Jia, Xiaodong; Song, Xiaoli; Zeng, Lintao; Yuan, Yu
Source:
Talanta 2019 v.204 pp. 747-752
ISSN:
0039-9140
Subject:
near-infrared spectroscopy,   etc   ; cyclization reactions; cysteine; cytotoxicity; detection limit; fluorescence; fluorescent dyes; mass spectrometry; water solubility;     Show all 9 Subjects
Abstract:
... A near-infrared (NIR) fluorescent probe (Cys-AN) for selective and sensitive detection of cysteine (Cys) was designed and synthesized. The fluorescent probe was water-soluble and had a large Stokes shift of 150 nm, whose detection limit could reach to 0.96 μM in PBS buffer. After we analyzed the HRMS, TLC and optical data, a proposed sensing mechanism for the detection of Cys could result from the ...
DOI:
10.1016/j.talanta.2019.06.074

14. Staling of white wheat bread crumb and effect of maltogenic α-amylases. Part 2: Monitoring the staling process by using near infrared spectroscopy and chemometrics

Author:
Amigo, José Manuel; del Olmo, Arantxa; Engelsen, Merete Møller; Lundkvist, Henrik; Engelsen, Søren Balling
Source:
Food chemistry 2019 v.297 pp. 124946
ISSN:
0308-8146
Subject:
near-infrared spectroscopy,   etc   ; alpha-amylase; chemometrics; hardness; least squares; loaves; monitoring; texture; wheat; white bread;     Show all 10 Subjects
Abstract:
... This second paper provides chemical insight of the different phenomena occurring in bread during storage with and without anti-staling enzymes by using near infrared spectroscopy and chemometrics. The target, thus, is three-fold: (1) To monitor the staling process in the top, middle and bottom parts of the white bread loaf by near infrared spectroscopy and to extract chemical information of the di ...
DOI:
10.1016/j.foodchem.2019.06.013

15. Food monitoring: Screening of the geographical origin of white asparagus using FT-NIR and machine learning

Author:
Richter, Bernadette; Rurik, Marc; Gurk, Stephanie; Kohlbacher, Oliver; Fischer, Markus
Source:
Food control 2019 v.104 pp. 318-325
ISSN:
0956-7135
Subject:
near-infrared spectroscopy,   etc   ; asparagus spears; monitoring; provenance; screening; support vector machines;     Show all 6 Subjects
Abstract:
... The aim of this study was to experimentally monitor the geographical origin of white asparagus based on near-infrared spectroscopy (NIR). 275 asparagus samples from six countries of origin and three years of harvest were analyzed. Support vector machine (SVM) classifiers were trained to predict the geographical origin and validated using nested cross-validation. When coupled with feature selection ...
DOI:
10.1016/j.foodcont.2019.04.032

16. Adaptation of visible and short wave Near Infrared (VIS-SW-NIR) common PLS model for quantifying paddy hardness

Author:
Awanthi, M.G.G.; Jinendra, B.M.S.; Navaratne, S.B.; Navaratne, C.M.
Source:
Journal of cereal science 2019 v.89 pp. 102795
ISSN:
0733-5210
Subject:
near-infrared spectroscopy,   etc   ; computer software; hardness; least squares; milling; models; new variety; paddies; rice;     Show all 9 Subjects
Abstract:
... Hardness of paddy is an indicator of preserved quality of rice as it maintains the integrity of grain to avoid falling-off during milling. Most of the prevailing methods carter to determine the hardness are destructive and time consuming. Though, use of Near Infrared (NIR) is nondestructive, its conventional approach implies separate Partial Least Square (PLS) model for each new paddy type to be p ...
DOI:
10.1016/j.jcs.2019.102795

17. Authentication of “Avola almonds” by near infrared (NIR) spectroscopy and chemometrics

Author:
Firmani, Patrizia; Bucci, Remo; Marini, Federico; Biancolillo, Alessandra
Source:
Subtropical plant science 2019 v.82 pp. 103235
ISSN:
0889-1575
Subject:
near-infrared spectroscopy,   etc   ; almonds; chemometrics; forestry; issues and policy; models; provenance; tourism; value-added products;     Show all 9 Subjects
Abstract:
... Avola almond is part of the “Traditional Italian Agri-food Product” (PAT) list, as established by The Italian Ministry of agricultural food, forestry and tourism policies; this endorsement testifies its status as a high added-value product, and, consequently, it highlights the need of analytical methodologies suitable for its authentication. For these reasons, in the present study, the possibility ...
DOI:
10.1016/j.jfca.2019.103235

18. Evaluation of matcha tea quality index using portable NIR spectroscopy coupled with chemometric algorithms

Author:
Wang, Jingjing; Zareef, Muhammad; He, Peihuan; Sun, Hao; Chen, Quansheng; Li, Huanhuan; Ouyang, Qin; Guo, Zhiming; Zhang, Zhengzhu; Xu, Delian
Source:
Journal of the science of food and agriculture 2019 v.99 no.11 pp. 5019-5027
ISSN:
0022-5142
Subject:
near-infrared spectroscopy,   etc   ; algorithms; amino acids; least squares; models; polyphenols; prediction; spectral analysis; tea;     Show all 9 Subjects
Abstract:
... BACKGROUND: The study reports a portable near infrared (NIR) spectroscopy system coupled with chemometric algorithms for prediction of tea polyphenols and amino acids in order to index matcha tea quality. RESULTS: Spectral data were preprocessed by standard normal variate (SNV), mean center (MC) and first‐order derivative (1ˢᵗD) tests. The data were then subjected to full spectral partial least sq ...
DOI:
10.1002/jsfa.9743

19. Surface water classification from GF-4 images using a time series water index

Author:
Ren, Yuhuan; Liu, Yalan
Source:
International journal of remote sensing 2019 v.40 no.16 pp. 6336-6364
ISSN:
1366-5901
Subject:
near-infrared spectroscopy,   etc   ; monitoring; remote sensing; satellites; statistical analysis; surface water; time series analysis; China;     Show all 8 Subjects
Abstract:
... Although satellite remote sensing imagery is suitable for mapping and monitoring the surface water, the application of surface water classification techniques in the literatures is still constrained by low accuracy in various situations. As the GF-4 satellite is one of the few moderate spatial resolution geostationary orbit remote sensing satellites, the purpose of this study is to introduce a met ...
DOI:
10.1080/01431161.2019.1590879

20. A near-infrared fluorescent probe for imaging endogenous carbon monoxide in living systems with a large Stokes shift

Author:
Gong, Shengyi; Hong, Jiaxin; Zhou, Enbo; Feng, Guoqiang
Source:
Talanta 2019 v.201 pp. 40-45
ISSN:
0039-9140
Subject:
near-infrared spectroscopy,   etc   ; carbon monoxide; fluorescence; fluorescent dyes; image analysis; signal-to-noise ratio;     Show all 6 Subjects
Abstract:
... Near-infrared (NIR) fluorescent probes with a large Stokes shift are very practical tools for bioimaging applications. Carbon monoxide (CO) is a key gaseous signal molecule and its imaging in living systems has attracted great attention in recent years. In this work, a very easy-to-get NIR fluorescent probe with a remarkable large pseudo-Stokes shift (238 nm) for detection of CO was reported. This ...
DOI:
10.1016/j.talanta.2019.03.111