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1. A smartphone readout device for portable and sensitive estimation of Hg2+ via coumarin-modified paper

Author:
Xueyan Liu; Rongsheng Gao; Lu Han; Chengyou Kan; Jianhong Xu
Source:
Talanta 2023 v.252 pp. 123849
ISSN:
0039-9140
Subject:
spectral analysis,   etc   ; color; cost effectiveness; detection limit; fluorescence; mobile telephones; paper;     Show all 7 Subjects
Abstract:
... The development of cost-effective sensing system for Hg²⁺ quantitation is highly demanded for environmental monitoring. In this work, we reported an on-site, rapid and portable smartphone-based Hg²⁺ sensing system integrating coumarin-modified paper as a probe and smartphone readout device as a processing platform. For fluorescent sensing of Hg²⁺, the modified paper was fabricated by chemically gr ...
DOI:
10.1016/j.talanta.2022.123849

2. Adaptive Spectral Model for abnormality detection based on physiological status monitoring of dairy cows

Author:
Jelena Muncan; Mari Miyazaki; Shinichiro Kuroki; Kentarou Ikuta; Roumiana Tsenkova
Source:
Talanta 2023 v.253 pp. 123893
ISSN:
0039-9140
Subject:
spectral analysis,   etc   ; algorithms; cows; milk; models; physiological state; time series analysis; wavelengths;     Show all 8 Subjects
Abstract:
... This research study developed milk spectral data-driven approach, called Adaptive Spectral Model for Abnormality Detection - ASMAD, for detection of physiological abnormalities of individual dairy cows. The algorithm is based on the logic that milk spectra of each individual cow is highly animal-specific, which means it could be used as a respective individual marker for identification. When the a ...
DOI:
10.1016/j.talanta.2022.123893

3. Fast Bayesian inference on spectral analysis of multivariate stationary time series

Author:
Zhixiong Hu; Raquel Prado
Source:
Computational statistics & data analysis 2023 v.178 pp. 107596
ISSN:
0167-9473
Subject:
spectral analysis,   etc   ; Bayesian theory; data collection; electroencephalography; models; time series analysis; wind speed; California;     Show all 8 Subjects
Abstract:
... Spectral analysis discovers trends, periodic and other characteristics of a time series by representing these features in the frequency domain. However, when multivariate time series are considered, and the number of components increases, the size of the spectral density matrix grows quadratically, making estimation and inference rather challenging. The proposed novel Bayesian framework considers ...
DOI:
10.1016/j.csda.2022.107596

4. Identification of liquors from the same brand based on ultraviolet, near-infrared and fluorescence spectroscopy combined with chemometrics

Author:
Miao He; Xiaolong Chen; Jing Zhang; Jiawei Li; Dong Zhao; Yang Huang; Danqun Huo; Xiaogang Luo; Changjun Hou
Source:
Food chemistry 2023 v.400 pp. 134064
ISSN:
0308-8146
Subject:
spectral analysis,   etc   ; automation; chemometrics; discriminant analysis; fluorescence; fluorescence emission spectroscopy; food chemistry; market economy;     Show all 8 Subjects
Abstract:
... Accurate identification of various liquors from the same brand is of great significance for safeguarding the rights and interests of consumers and the market economy. Here, the spectral properties of liquors were studied based on ultraviolet (UV), near-infrared (NIR) and multi-way fluorescence spectroscopy. Then these liquors were distinguished by integrating their spectral properties with the che ...
DOI:
10.1016/j.foodchem.2022.134064

5. Application of near-infrared hyperspectral imaging coupled with chemometrics for rapid and non-destructive prediction of protein content in single chickpea seed

Author:
Dhritiman Saha; T. Senthilkumar; Sonu Sharma; Chandra B. Singh; Annamalai Manickavasagan
Source:
Journal of food composition and analysis 2023 v.115 pp. 104938
ISSN:
0889-1575
Subject:
spectral analysis,   etc   ; chemometrics; chickpeas; food composition; least squares; models; prediction; protein content; reflectance; support vector machines; wavelengths;     Show all 11 Subjects
Abstract:
... Evaluating the protein content of a single chickpea seed in a rapid, non-destructive, and precise manner is crucial for facilitating the breeding of high-protein chickpeas. This study explored the potential of near-infrared (NIR) hyperspectral imaging (HSI) to predict the protein content in a single chickpea seed. Eight varieties of chickpeas with different protein contents were subjected to NIR r ...
DOI:
10.1016/j.jfca.2022.104938

6. Hyperspectral imaging and chemometrics assessment of intramuscular fat in pork Longissimus thoracic et lumborum primal cut

Author:
Christopher T. Kucha; Li Liu; Michael Ngadi; Claude Gariépy
Source:
Food control 2023 v.145 pp. 109379
ISSN:
0956-7135
Subject:
spectral analysis,   etc   ; animals; backfat; chemometrics; dissection; food safety; intramuscular fat; longissimus muscle; meat cuts; pork; prediction; psoas muscles;     Show all 12 Subjects
Abstract:
... To assess the intramuscular fat (IMF) of Longissimus thoracis et lumborum (LTL) primal cut excised from an animal carcass, rib sections are dissected for chemical or subjective evaluation. Dissection destroys the integrity of the LTL. This study examined the feasibility of developing a method based on hyperspectral imaging to predict the IMF of pork LTL using hyperspectral imaging. Spectral inform ...
DOI:
10.1016/j.foodcont.2022.109379

7. From lab to factory: A calibration transfer strategy from HSI to online NIR optimized for quality control of green tea fixation

Author:
Yujie Wang; Zhengyu Ren; Maoyu Li; Chengye Lu; Wei-Wei Deng; Zhengzhu Zhang; Jingming Ning
Source:
Journal of food engineering 2023 v.339 pp. 111284
ISSN:
0260-8774
Subject:
spectral analysis,   etc   ; beverage industry; calibration; green tea; least squares; models; prediction; quality control; rapid methods; spectroscopy; water content;     Show all 11 Subjects
Abstract:
... Fixation is the key step of green tea processing, usually with moisture content as the quality evaluation indicator. Near-infrared (NIR) spectroscopy has been widely used in tea moisture detection but is mostly realized in the laboratory, and online detection in tea processing is limited. This study explores the possibility of calibration transfer from lab-based hyperspectral imaging (HSI) to onli ...
DOI:
10.1016/j.jfoodeng.2022.111284

8. Rapid identification of salmonella serovars by using Raman spectroscopy and machine learning algorithm

Author:
Jiazheng Sun; Xuefang Xu; Songsong Feng; Hanyu Zhang; Lingfeng Xu; Hong Jiang; Baibing Sun; Yuyan Meng; Weizhou Chen
Source:
Talanta 2023 v.253 pp. 123807
ISSN:
0039-9140
Subject:
spectral analysis,   etc   ; Raman spectroscopy; Salmonella; algorithms; foodborne illness; humans; model validation; neural networks; public health; salmonellosis; serotypes; wavelengths;     Show all 12 Subjects
Abstract:
... A widespread and escalating public health problem worldwide is foodborne illness, and foodborne Salmonella infection is one of the most common causes of human illness.For the three most pathogenic Salmonella serotypes, Raman spectroscopy was employed to acquire spectral data.As machine learning offers high efficiency and accuracy, we have chosen the convolutional neural network(CNN), which is suit ...
DOI:
10.1016/j.talanta.2022.123807

9. Dithiothreitol-induced reassembly of soybean lipophilic protein as a carrier for resveratrol: Preparation, structural characterization, and functional properties

Author:
Mingming Zhong; Yufan Sun; Hanyu Song; Yi Liao; Baokun Qi; Yang Li
Source:
Food chemistry 2023 v.399 pp. 133964
ISSN:
0308-8146
Subject:
spectral analysis,   etc   ; bioavailability; digestion; disulfide bonds; dithiothreitol; encapsulation; food chemistry; lipophilicity; methylcellulose; pH; polyacrylamide gel electrophoresis; resveratrol; solubility; soybeans; temperature;     Show all 15 Subjects
Abstract:
... We employed dithiothreitol (DTT) to reassemble soy lipophilic protein (LP) and increased its solubility for encapsulating resveratrol (Res); we subsequently added hydroxypropyl methylcellulose (HPMC) to further stabilize Res. Physicochemical characterization, sodium dodecyl sulfate–polyacrylamide gel electrophoresis, and spectral analysis revealed that DTT triggered the breakage and reassembly of ...
DOI:
10.1016/j.foodchem.2022.133964

10. The microbial synergy and response mechanisms of hydrolysis-acidification combined microbial electrolysis cell system with stainless-steel cathode for textile-dyeing wastewater treatment

Author:
Jiawei Xie; Xinyi Zou; Yaofeng Chang; Junxiang Xie; He Liu; Min-hua Cui; Tian C. Zhang; Chongjun Chen
Source:
Science of the total environment 2023 v.855 pp. 158912
ISSN:
0048-9697
Subject:
spectral analysis,   etc   ; biodegradability; carbon; cathodes; cost effectiveness; electric potential difference; electrical treatment; environment; microbial electrolysis cells; phylogeny; stainless steel; wastewater; wastewater treatment;     Show all 13 Subjects
Abstract:
... Microbial electrolysis cell (MEC) has been existing problems such as poor applicability to real wastewater and lack of cost-effective electrode materials in the practical application of refractory wastewater. A hydrolysis-acidification combined MEC system (HAR-MECs) with four inexpensive stainless-steel and conventional carbon cloth cathodes for the treatment of real textile-dyeing wastewater, whi ...
DOI:
10.1016/j.scitotenv.2022.158912

11. Complete 1H and 13C NMR spectral assignment of d-glucofuranose

Author:
Elin Alexandersson; Gustav Nestor
Source:
Carbohydrate research 2022 v.511 pp. 108477
ISSN:
0008-6215
Subject:
spectral analysis,   etc   ; glucose; research;     Show all 3 Subjects
Abstract:
... Although d-glucose is the most common sugar in nature, only a few NMR studies have focused on its minor furanose forms, and they have been limited to the anomeric position. Here, complete ¹H and ¹³C NMR spectral analysis of α- and β-d-glucofuranose was performed, including signal assignment, chemical shifts, and coupling constants. Selective and non-selective 1D and 2D NMR experiments were used fo ...
DOI:
10.1016/j.carres.2021.108477

12. Direct comparison of hyperspectral stimulated raman scattering and coherent anti-stokes raman scattering microscopy for chemical imaging

Author:
Clark Matthew G.; Brasseale III Kent A.; Gonzalez Gil A.; Eakins Gregory; Zhang Chi
Source:
Journal of visualized experiments 2022 no.182 pp. e63677
ISSN:
1940-087X
Subject:
spectral analysis,   etc   ; energy; microscopy;     Show all 3 Subjects
Abstract:
... Stimulated Raman scattering (SRS) and coherent anti-Stokes Raman scattering (CARS) microscopy are the most widely used coherent Raman scattering imaging technologies. Hyperspectral SRS and CARS imaging offer Raman spectral information at every pixel, which enables better separation of different chemical compositions. Although both techniques require two excitation lasers, their signal detection sc ...
DOI:
10.3791/63677

13. Ligand-Field Spectroscopy of Co(III) Complexes and the Development of a Spectrochemical Series for Low-Spin d⁶ Charge-Transfer Chromophores

Author:
Jonathan T. Yarranton; James K. McCusker
Source:
Journal of the American Chemical Society 2022 v.144 no.27 pp. 12488-12500
ISSN:
1520-5126
Subject:
spectral analysis,   etc   ; ligands; spectroscopy;     Show all 3 Subjects
Abstract:
... A study of a series of six-coordinate Co(III) complexes has been carried out to quantify spectroscopic parameters for a range of ligands that are commonly employed to realize strong charge-transfer absorptions in low-spin, d⁶ systems. Identification of any three ligand-field transitions allows for the determination of the splitting parameter (10 Dq) as well as the Racah B and C parameters for a gi ...
DOI:
10.1021/jacs.2c04945

14. Pitfalls in the structural elucidation of small molecules. A critical analysis of a decade of structural misassignments of marine natural products

Author:
Shou-Mao Shen; Giovanni Appendino; Yue-Wei Guo
Source:
Natural product reports 2022 v.39 no.9 pp. 1803-1832
ISSN:
1460-4752
Subject:
spectral analysis,   etc   ; biosynthesis; crystallography;     Show all 3 Subjects
Abstract:
... This article summarizes more than 200 cases of misassigned marine natural products reported between July 2010 and August 2021, sorting out errors according to the structural elements. Based on a comparative analysis of the original and the revised structures, major pitfalls still plaguing the structural elucidation of small molecules were identified, emphasizing the role of total synthesis, crysta ...
DOI:
10.1039/d2np00023g

15. Availability of Automatic Identification System (AIS) Based on Spectral Analysis of Mean Time to Repair (MTTR) Determined from Dynamic Data Age

Author:
Krzysztof Jaskólski
Source:
Remote Sensing 2022 v.14 no.15 pp. -
ISSN:
2072-4292
Subject:
spectral analysis,   etc   ; models; radio;     Show all 3 Subjects
Abstract:
... Good marine practice and proper operation of navigation, radio navigation, and radio communication systems are nowadays of key importance for marine navigation safety. This applies to merchant vessels and navy ships and effectively monitoring unmanned vehicles along a set route. Technological progress has contributed to developing equipment for ships and unmanned vehicles, which are fitted out wit ...
DOI:
10.3390/rs14153692

16. Total synthesis of naturally occurring moracinflavan E and related compounds

Author:
Ting-Yu Lin; Chieh-Yu Chou; Yu-Hsuan Chen; Chien-Kuo Ku; Ming-Jaw Don
Source:
Phytochemistry letters 2022 v.50 pp. 118-127
ISSN:
1874-3900
Subject:
spectral analysis,   etc   ; flavanones; furans;     Show all 3 Subjects
Abstract:
... A total synthesis of four flavans with a furan ring in different positions (1–4) was achieved successfully. The flavan was synthesized from flavanone by reduction and followed by deoxygenation steps. The synthesized compound 2 was confirmed as the naturally occurring moracinflavan E based on the comparison of their NMR spectral data. ...
DOI:
10.1016/j.phytol.2022.05.011

17. An asymmetric small-molecule donor enables over 18% efficiency in ternary organic solar cells

Author:
Ming Guan; Wuxi Tao; Linyong Xu; Youmei Qin; Jianqi Zhang; Songting Tan; Meihua Huang; Bin Zhao
Source:
Journal of materials chemistry A 2022 v.10 no.17 pp. 9746-9752
ISSN:
2050-7496
Subject:
spectral analysis,   etc   ; absorption; energy;     Show all 3 Subjects
Abstract:
... An asymmetric small molecule donor, TTBT-R, incorporated with 4,5-di(2-ethylhexyl)oxybenzo[2,1-b:3,4-b′]dithiophene as the core, was exploited for high-performance ternary organic solar cells (OSCs), and possesses a complementary absorption band and cascaded energy levels with PM6 and Y6. The ternary blend film (PM6:TTBT-R:Y6 = 0.9 : 0.1 : 1) attains the most optimized morphology with a nanofiber- ...
DOI:
10.1039/d2ta00564f

18. Further Study on Chemical Constituents from the Seeds of Michelia hedyosperma

Author:
Hai-jun Wang; Li-na Qin; Ming-Zhu Li; Xian-you Wang
Source:
Chemistry of natural compounds 2022 v.58 no.1 pp. 75-77
ISSN:
0009-3130
Subject:
spectral analysis,   etc   ; Magnolia hypolampra; glucosides;     Show all 3 Subjects
Abstract:
... A new phenylpropanoid glucoside, michehedyoside G (1), together with two known compounds, including 9-(β-D-ribofuranosyl)-adenosine (2) and (±)-1,2-methylenedioxy-4-(1,2,3-trihydroxypropyl)-benzene (3), were isolated from the seeds of Michelia hedyosperma Y. W. Law (Magnoliaceae). Their structures were confirmed by comprehensive spectroscopic analysis. ...
DOI:
10.1007/s10600-022-03599-9

19. Amycolachromones A–F, Isolated from a Streptomycin-Resistant Strain of the Deep-Sea Marine Actinomycete Amycolatopsis sp. WP1

Author:
Jianwei Chen; Jun Chen; Siqi Wang; Xiaoze Bao; Songwei Li; Bin Wei; Huawei Zhang; Hong Wang
Source:
Marine drugs 2022 v.20 no.3 pp. -
ISSN:
1660-3397
Subject:
spectral analysis,   etc   ; Amycolatopsis; X-radiation;     Show all 3 Subjects
Abstract:
... In this study, a detailed chemical investigation of a streptomycin-resistant strain of the deep-sea marine, actinomycete Amycolatopsis sp. WP1, yielded six novel amycolachromones A–F (1–6), together with five known analogues (7–11). Amycolachromones A–B (1–2) possessed unique dimer skeletons. The structures and relative configurations of compounds 1–11 were elucidated by extensive spectroscopic da ...
DOI:
10.3390/md20030162

20. Ditelluride, Terminal Tellurido, and Bis(tellurido) Motifs of Titanium

Author:
Pavel Zatsepin; Jun-Hyeong Kim; Michael R. Gau; Patrick J. Carroll; Bimal Pudasaini; Mu-Hyun Baik; Daniel J. Mindiola
Source:
Journal of the American Chemical Society 2022 v.144 no.29 pp. 13066-13070
ISSN:
1520-5126
Subject:
spectral analysis,   etc   ; reducing agents; titanium;     Show all 3 Subjects
Abstract:
... Highly modular and rational syntheses of titanium compounds containing ditelluride, terminal telluride, and bis(telluride) structural motifs are disclosed in this study. Titanate anions bearing two cis and terminal telluride functionalities bound to the same metal center represent a unique example of a group 4 transition metal bis(chalcogenide) ion and are accessed in a simple, single-step procedu ...
DOI:
10.1021/jacs.2c05558