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1. Theae nigrae folium: Comparing the analytical performance of benchtop and handheld near-infrared spectrometers

Author:
Mayr, Sophia; Schmelzer, Julia; Kirchler, Christian G.; Pezzei, Cornelia K.; Beć, Krzysztof B.; Grabska, Justyna; Huck, Christian W.
Source:
Talanta 2021 v.221 pp. 121165
ISSN:
0039-9140
Subject:
near-infrared spectroscopy,   etc   ; Camellia sinensis; black tea; caffeine; least squares; models; prediction; quantum mechanics; spectrometers; Switzerland;     Show all 10 Subjects
Abstract:
... We investigated caffeine and l-theanine, quality characteristics for camellia sinensis, in milled and ground black tea samples with near-infrared (NIR) spectroscopy giving a direct comparison between the performances of benchtop and handheld NIR spectrometers. The constructed partial least squares regression (PLSR) models for all spectrometers were validated by test-set-validation and according to ...
DOI:
10.1016/j.talanta.2020.121165

2. A rapid food chain approach for authenticity screening: The development, validation and transferability of a chemometric model using two handheld near infrared spectroscopy (NIRS) devices

Author:
McVey, Claire; McGrath, Terry F.; Haughey, Simon A.; Elliott, Christopher T.
Source:
Talanta 2021 v.222 pp. 121533
ISSN:
0039-9140
Subject:
near-infrared spectroscopy,   etc   ; adulterants; chemometrics; computer software; cost effectiveness; food chain; food fraud; food supply chain; models; monitoring; oregano; prediction; product authenticity; screening;     Show all 14 Subjects
Abstract:
... This study assesses the application of a handheld, near infrared spectroscopy (NIRS) device, namely the NeoSpectra Micro, for the determination of oregano authenticity. Utilising a large sample set of oregano (n = 295) and potential adulterants of oregano (n = 109), models were developed and validated using SIMCA 15 software. The models demonstrated excellent predictability for the determination o ...
DOI:
10.1016/j.talanta.2020.121533

3. High-Sensitivity Visible–Near Infrared Organic Photodetectors Based on Non-Fullerene Acceptors

Author:
Liu, Guanghong; Li, Tengfei; Zhan, Xiaowei; Wu, Hongbin; Cao, Yong
Source:
ACS applied materials & interfaces 2020 v.12 no.15 pp. 17769-17775
ISSN:
1944-8252
Subject:
near-infrared spectroscopy,   etc   ; light intensity; polymers;     Show all 3 Subjects
Abstract:
... Highly sensitive solution-processed organic photodetectors (OPDs) with a broadband response ranging from visible to near infrared (NIR) and excellent overall device performance are demonstrated. The OPDs were fabricated from a blend consisting of a wide-band gap polymer donor and a newly developed fused octacylic small-molecule electron acceptor with an acceptor–donor–acceptor structure, which sho ...
DOI:
10.1021/acsami.0c00191

4. Near-Infrared Electron Acceptors with Unfused Architecture for Efficient Organic Solar Cells

Author:
He, Chengliang; Li, Yaokai; Li, Shuixing; Yu, Zhi-Peng; Li, Yuhao; Lu, Xinhui; Shi, Minmin; Li, Chang-Zhi; Chen, Hongzheng
Source:
ACS applied materials & interfaces 2020 v.12 no.14 pp. 16700-16706
ISSN:
1944-8252
Subject:
near-infrared spectroscopy,   etc   ; polymers; solar cells;     Show all 3 Subjects
Abstract:
... The absorption of nonfullerene acceptors (NFAs) at near-infrared (NIR) regions is crucial for obtaining high current densities in organic solar cells (OSCs). Herein, two narrow-band gap NFAs with unfused backbones possessing broad (600–900 nm) and strong absorption are developed by the conjugation of a benzothiadiazole core to halogenated end groups through a cyclopentadithiophene bridge. Compared ...
DOI:
10.1021/acsami.0c00837

5. Classification Modeling Method for Near-Infrared Spectroscopy of Tobacco Based on Multimodal Convolution Neural Networks

Author:
Zhang, Lei; Ding, Xiangqian; Hou, Ruichun
Source:
Journal of Analytical Methods in Chemistry (Online) 2020 v.2020
ISSN:
2090-8873
Subject:
near-infrared spectroscopy,   etc   ; neural networks; tobacco; China;     Show all 4 Subjects
Abstract:
... The origin of tobacco is the most important factor in determining the style characteristics and intrinsic quality of tobacco. There are many applications for the identification of tobacco origin by near-infrared spectroscopy. In order to improve the accuracy of the tobacco origin classification, a near-infrared spectrum (NIRS) identification method based on multimodal convolutional neural networks ...
DOI:
10.1155/2020/9652470
PubMed:
32104610
PubMed Central:
PMC7037502

6. Simple Near-Infrared Electron Acceptors for Efficient Photovoltaics and Sensitive Photodetectors

Author:
Wen, Tian-Jiao; Wang, Di; Tao, Liting; Xiao, Yiqun; Tao, Yang-Dan; Li, Yaokai; Lu, Xinhui; Fang, Yanjun; Li, Chang-Zhi; Chen, Hongzheng; Yang, Deren
Source:
ACS applied materials & interfaces 2020 v.12 no.35 pp. 39515-39523
ISSN:
1944-8252
Subject:
near-infrared spectroscopy,   etc   ; carbon; detectors; nitrogen; polymers; silicon; solar energy;     Show all 7 Subjects
Abstract:
... Although promising progress has been made in near-infrared (NIR) electron acceptors for broadening photoresponse of optoelectronics, there are still strong needs for efficient NIR materials with low synthetic complexities. In this work, three simple NIR acceptors are developed with absorption up to 1000 nm and possessing the same dithiophene cores with varied heteroatom linkages to carbon (C) atom ...
DOI:
10.1021/acsami.0c12100

7. Near-infrared photothermal conversion of stable radicals photoinduced from a viologen-based coordination polymer

Author:
Wang, Shanshan; Li, Shuning; Xiong, Junyu; Lin, Zhengguo; Wei, Wei; Xu, Yanqing
Source:
Chemical communications 2020 v.56 no.54 pp. 7399-7402
ISSN:
1364-548X
Subject:
near-infrared spectroscopy,   etc   ; chemical reactions; coordination polymers; free radicals; irradiation;     Show all 5 Subjects
Abstract:
... Upon simple UV-visible irradiation, a viologen-based coordination polymer was transformed to a highly stable radical, protected against quenching by a densely packed structure. The photo-generated radical exhibited a remarkable near-infrared (NIR) photothermal effect with good recyclability and high conversion efficiency. To our knowledge, this is the first example of a crystalline viologen-based ...
DOI:
10.1039/d0cc02193h

8. One-pot synthesis of β-cyclodextrin modified Au nanoclusters with near-infrared emission

Author:
Li, Wenjing; Wang, Xi; Jiang, Tao; Ma, Xiang; Tian, He
Source:
Chemical communications 2020 v.56 no.42 pp. 5580-5583
ISSN:
1364-548X
Subject:
near-infrared spectroscopy,   etc   ; beta-cyclodextrin; chemical reactions; nanogold; nanoparticles; synthesis;     Show all 6 Subjects
Abstract:
... β-Cyclodextrin modified gold nanoclusters (AuNCs@β-CD) with near-infrared (NIR) emission were facilely and successfully prepared based on a one-pot and green synthesis route, which provides an interesting and efficient strategy to realize NIR emissive nanoclusters via supramolecular macrocycle modification. ...
DOI:
10.1039/d0cc00713g

9. Effects of prophylactic naps on physical fitness/exercise ability and executive function in healthy young trained males

Author:
Tanabe, Kosuke; Nakazato, Koichi; Noi, Shingo
Source:
Biological rhythm research 2020 v.51 no.3 pp. 421-440
ISSN:
1744-4179
Subject:
near-infrared spectroscopy,   etc   ; exercise; males; physical fitness; prefrontal cortex;     Show all 5 Subjects
Abstract:
... This study examined the effects of prophylactic naps on physical fitness/exercise ability and executive function. Seven healthy trained males (mean age, 21.1 ± 0.4 years) participated in four experimental conditions (counterbalanced design): 90-min sitting rest (con condition); 30-min nap (nap30 condition); 60-min nap (nap60 condition); and 90-min nap (nap90 condition). Physical fitness/exercise a ...
DOI:
10.1080/09291016.2018.1533742

10. Rational design of pyrrolopyrrole-aza-BODIPY-based acceptor–donor–acceptor triads for organic photovoltaics application

Author:
Feng, Ru; Sato, Narumi; Yasuda, Takuma; Furuta, Hiroyuki; Shimizu, Soji
Source:
Chemical communications 2020 v.56 no.20 pp. 2975-2978
ISSN:
1364-548X
Subject:
near-infrared spectroscopy,   etc   ; absorption; chemical compounds; chemical reactions; solar energy;     Show all 5 Subjects
Abstract:
... Acceptor–donor–acceptor triads consisting of diketopyrrolopyrrole (DPP) or pyrrolopyrrole aza-BODIPY (PPAB) or both as acceptors and cyclopentadithiophene as a donor were rationally designed for near infrared (NIR) photovoltaics application. Among them, the PPAB-based triad exhibited the highest power conversion efficiency of 3.88% owing to the panchromatic absorption in the UV/vis/NIR regions. ...
DOI:
10.1039/d0cc00398k

11. Surface Plasmon Resonance-Enhanced Near-Infrared Absorption in Single-Layer MoS₂ with Vertically Aligned Nanoflakes

Author:
Min, Bok Ki; Nguyen, Van-Tam; Kim, Seong Jun; Yi, Yoonsik; Choi, Choon-Gi
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 14476-14483
ISSN:
1944-8252
Subject:
near-infrared spectroscopy,   etc   ; electrochemistry; molybdenum disulfide; nanomaterials; oxygen; vapors; wavelengths;     Show all 7 Subjects
Abstract:
... The development of MoS₂ with two- or three-dimensional heterostructures can provide a significant breakthrough for the enhancement of photodetection abilities such as increase in light absorption and expanding the detection ranges. Till date, although the synthesis of a MoS₂ layer with three-dimensional nanostructures using a chemical vapor deposition (CVD) process has been successfully demonstrat ...
DOI:
10.1021/acsami.9b18148

12. Terahertz Time of Flight Spectroscopy as a Coating Thickness Reference Method for Partial Least Squares Near Infrared Spectroscopy Models

Author:
Mohan, Shikhar; Odani, Noritaka; Hossain, Md. Nayeem; Feng, Hanzhou; Li, Yi; Kato, Eiji; Drennen, James K.; Anderson, Carl A.
Source:
Analytical chemistry 2020 v.92 no.5 pp. 3658-3665
ISSN:
1520-6882
Subject:
near-infrared spectroscopy,   etc   ; coatings; least squares; models; monitoring; normal values;     Show all 6 Subjects
Abstract:
... Near infrared spectroscopy (NIRS) is often used during the tablet coating process to assess coating thickness. As the coating process proceeds, the increase and decrease in NIRS signal from both the coating formulation and tablet core has been related to coating thickness. Partial least-squares models are often generated relating NIRS spectra to reference coating thickness measurements for in-line ...
DOI:
10.1021/acs.analchem.9b04750

13. Synthesis and photovoltaic application of NIR-emitting perylene-monoimide dyes with large Stokes-shift

Author:
Sharma, Vikas; Kovida,; Sahoo, Dhananjaya; Varghese, Nonu; Mohanta, Kallol; Koner, Apurba Lal
Source:
RSC advances 2019 v.9 no.52 pp. 30448-30452
ISSN:
2046-2069
Subject:
near-infrared spectroscopy,   etc   ; absorption; dyes;     Show all 3 Subjects
Abstract:
... An efficient Sonogashira coupling protocol is developed for tetra-alkynylation at the bay and peri-positions of the perylene-monoimide (PMI) dye in its PMI(Br)₄ form. The absorption band for these PMI dyes covered from the visible to Near-infrared (NIR) region and PMI(NMe₂)₄ is found to exhibit a record-breaking Stokes-shifted NIR emission with good photovoltaic properties. ...
DOI:
10.1039/c9ra04833b

14. Evaluation of an autoencoder as a feature extraction tool for near-infrared spectroscopic discriminant analysis

Author:
Jo, Seeun; Sohng, Woosuk; Lee, Hyeseon; Chung, Hoeil
Source:
Food chemistry 2020 v.331 pp. 127332
ISSN:
0308-8146
Subject:
near-infrared spectroscopy,   etc   ; agricultural products; case studies; discriminant analysis; provenance; spectral analysis; support vector machines;     Show all 7 Subjects
Abstract:
... The utility of an autoencoder (AE) as a feature extraction tool for near-infrared (NIR) spectroscopy-based discrimination analysis has been explored and the discrimination of the geographic origins of 8 different agricultural products has been performed as the case study. The sample spectral features were broad and insufficient for component distinction due to considerable overlap of individual ba ...
DOI:
10.1016/j.foodchem.2020.127332

15. Implementing PAT for single-pass tangential flow ultrafiltration for continuous manufacturing of monoclonal antibodies

Author:
Thakur, Garima; Thori, Swapnil; Rathore, Anurag S.
Source:
Journal of membrane science 2020 v.613 pp. 118492
ISSN:
0376-7388
Subject:
near-infrared spectroscopy,   etc   ; algorithms; artificial membranes; case studies; cleaning; empirical models; manufacturing; monitoring; monoclonal antibodies; ultrafiltration;     Show all 10 Subjects
Abstract:
... Control of single pass tangential flow ultrafiltration is crucial for continuous manufacturing of monoclonal antibodies. We propose a strategy to control the output concentration of a continuous ultrafiltration step regardless of variations in the volume or concentration of the feed material. Scheduling algorithms for the filtration runs and cleaning cycles are developed, accounting for the expect ...
DOI:
10.1016/j.memsci.2020.118492

16. Rational design of a near-infrared fluorescence probe for highly selective sensing butyrylcholinesterase (BChE) and its bioimaging applications in living cell

Author:
Ma, Jianlong; Lu, Xiaofeng; Zhai, Honglin; Li, Qiang; Qiao, Li; Guo, Yong
Source:
Talanta 2020 v.219 pp. 121278
ISSN:
0039-9140
Subject:
near-infrared spectroscopy,   etc   ; absorbance; acetylcholinesterase; bioimaging; chlorine; cholinesterase; fluorescence; fluorescent dyes; substrate specificity;     Show all 9 Subjects
Abstract:
... In the current work, a near-infrared (NIR) fluorescent probe (CyClCP) was developed for fast (35 min), highly sensitive (LOD of 3.75 U/L) and selective response to BChE in vitro and in vivo. Upon the addition of BChE, CyClCP could be efficiently activated with remarkable NIR (λₑₘ = 708 nm) fluorescence enhancement and obvious absorbance red shift (581 nm–687 nm). Specifically, according to the sub ...
DOI:
10.1016/j.talanta.2020.121278

17. Application of near-infrared spectroscopy to predict the cooking times of aged common beans (Phaseolus vulgaris L.)

Author:
Wafula, Elizabeth Nakhungu; Wainaina, Irene Njoki; Buvé, Carolien; Nguyen, Nghia-Do-Trong; Kinyanjui, Peter Kahenya; Saeys, Wouter; Sila, Daniel Ndaka; Hendrickx, Marc
Source:
Journal of food engineering 2020 v.284 pp. 110056
ISSN:
0260-8774
Subject:
near-infrared spectroscopy,   etc   ; Phaseolus vulgaris; beans; cooking; least squares; model validation; prediction; pressing; storage conditions; wavelengths;     Show all 10 Subjects
Abstract:
... The cooking time of beans is an important quality indicator which can change considerably during ageing. Therefore, this study investigated the potential of near-infrared spectroscopy to rapidly predict cooking times of aged common beans. Four bean varieties were aged under different storage conditions, resulting in a range of samples for each of these varieties. The cooking kinetics of the aged b ...
DOI:
10.1016/j.jfoodeng.2020.110056

18. Three–level simultaneous component analysis for analyzing the near–infrared spectra of aqueous solutions under multiple perturbations

Author:
Han, Li; Cui, Xiaoyu; Cai, Wensheng; Shao, Xueguang
Source:
Talanta 2020 v.217 pp. 121036
ISSN:
0039-9140
Subject:
near-infrared spectroscopy,   etc   ; aqueous solutions; dissociation; isoelectric point; pH; proline; quantitative analysis; spectral analysis; temperature;     Show all 9 Subjects
Abstract:
... Quantitative analysis under various perturbations is a difficult problem because the analytical signal changes with different factors. In this work, three–level simultaneous component analysis (3–MSCA) was used for analyzing the near–infrared (NIR) spectra of aqueous solutions under different perturbations. The spectral data of aqueous proline solutions at different pH, concentration and temperatu ...
DOI:
10.1016/j.talanta.2020.121036

19. Non-destructive analysis of the moisture content in shiitake mushrooms (Lentinula edodes) using near-infrared imaging at 1450 nm

Author:
Shinoda, Kazuma; Konno, Naotake; Suzuki, Tomohiro
Source:
Mycoscience 2020 v.61 no.5 pp. 235-239
ISSN:
1340-3540
Subject:
near-infrared spectroscopy,   etc   ; Lentinula edodes; freshness; image analysis; mushrooms; nondestructive methods; prediction; water content;     Show all 8 Subjects
Abstract:
... Moisture content (MC) is an important factor in the freshness of shiitake mushrooms (Lentinula edodes). In this study, we developed a simple prediction method for MC of shiitake mushrooms using near-infrared (NIR) imaging at 1450 nm, as the band at 1450 nm is strongly correlated with OH groups. First, a NIR image was captured by an InGaAs sensor with a bandpass filter of 1450 nm; the captured imag ...
DOI:
10.1016/j.myc.2020.04.005

20. Predicting macronutrients and energy content of snack products using FT-NIR analysis and chemometric techniques

Author:
Benes, Eszter; Gere, Attila; Fodor, Marietta
Source:
Journal of food engineering 2020 v.280 pp. 109954
ISSN:
0260-8774
Subject:
near-infrared spectroscopy,   etc   ; chemometrics; energy content; least squares; prediction; raw materials; salt content; snacks; sugars;     Show all 9 Subjects
Abstract:
... Nowadays, the consumption of snack products is permanently increasing. Because of the growing trend of snack consumption, it is more and more difficult to guarantee the quality and safety of the products. Near infrared spectroscopy (NIRS) method, combined with chemometric techniques provide outstanding solutions, due to its rapidity and simple sample preparation. The objective of this study was to ...
DOI:
10.1016/j.jfoodeng.2020.109954