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1. Toward more intercomparable road dust studies

Author:
Lanzerstorfer, Christof
Source:
Critical reviews in environmental science and technology 2021 v.51 no.8 pp. 826-855
ISSN:
1547-6537
Subject:
chemical analysis,   etc   ; dust; technology;     Show all 3 Subjects
Abstract:
... Road dust (RDS) often contains elevated concentrations of pollutants, especially metals. Numerous studies were performed in the last two decades investigating the concentrations of metals like Cu, Pb, and Zn in RDS. In a literature search 177 studies were found where RDS bulk samples were analyzed. In another 49 studies the RDS samples were split into a number of size fractions to consider also th ...
DOI:
10.1080/10643389.2020.1737472

2. Plant-Matrix Certified Reference Materials as a Tool for Ensuring the Uniformity of Chemical Measurements

Author:
Vasil’eva, I. E.; Shabanova, E. V.
Source:
Journal of analytical chemistry 2021 v.76 no.2 pp. 137-155
ISSN:
1061-9348
Subject:
chemical analysis,   etc   ; quality control; toxicity;     Show all 3 Subjects
Abstract:
... The role of plant-matrix certified reference materials as instruments ensuring the uniformity of measurements and the reliability of the results in performing ecological research and the production of foodstuffs and medicines is discussed. Specific features of the composition of plants as of test materials for chemical analysis and requirements to the methods of its determination are considered fr ...
DOI:
10.1134/S1061934821020143

3. Photo-assembly of plasmonic nanoparticles: methods and applications

Author:
Krajczewski, Jan; Ambroziak, Robert; Kudelski, Andrzej
Source:
RSC advances 2021 v.11 no.5 pp. 2575-2595
ISSN:
2046-2069
Subject:
chemical analysis,   etc   ; isomerization; medicine; photocatalysis;     Show all 4 Subjects
Abstract:
... In this review article, various methods for the light-induced manipulation of plasmonic nanoobjects are described, and some sample applications of this process are presented. The methods of the photo-induced nanomanipulation analyzed include methods based on: the light-induced isomerization of some compounds attached to the surface of the manipulated object causing formation of electrostatic, host ...
DOI:
10.1039/d0ra09337h

4. Combining chemical analysis, sensory profile, CATA, preference mapping and chemometrics to establish the consumer quality standard of Camembert‐type cheeses

Author:
Los, Paulo Ricardo; Simões, Deise Rosana Silva; Benvenutti, Laís; Zielinski, Acácio Antonio Ferreira; Alberti, Aline; Nogueira, Alessandro
Source:
International journal of dairy technology 2021 v.74 no.2 pp. 371-382
ISSN:
1364-727X
Subject:
chemical analysis,   etc   ; cheeses; chemometrics; sensory evaluation;     Show all 4 Subjects
Abstract:
... This study aimed to establish a consumer quality standard for Camembert‐type cheeses, combining chemical analysis, sensory profile, CATA (Check‐All‐That‐Apply), preference mapping and chemometrics. The cheeses were manufactured using three different cultures (‘O’ mesophilic homofermentative; ‘T’ thermophilic and ‘LD’ mesophilic heterofermentative) and assessed at different ripening times (14, 21 a ...
DOI:
10.1111/1471-0307.12753

5. Interplay between multiple doping elements in high-voltage LiCoO₂

Author:
Song, Sicheng; Li, Yiwei; Yang, Kai; Chen, Zhefeng; Liu, Jiajie; Qi, Rui; Li, Zhibo; Zuo, Changjian; Zhao, Wenguang; Yang, Ni; Zhang, Mingjian; Pan, Feng
Source:
Journal of materials chemistry A 2021 v.9 no.9 pp. 5702-5710
ISSN:
2050-7496
Subject:
chemical analysis,   etc   ; electric potential difference; energy density;     Show all 3 Subjects
Abstract:
... Pursing a higher upper cutoff voltage rejuvenates conventional LiCoO₂ (LCO) in the application of high-energy-density Li-ion batteries. Recently, multiple element doping (Q. Liu et al., Nature Energy, 2018, 3, 936–943; J. N. Zhang et al., Nature Energy, 2019, 4, 594–603) has pushed the upper cutoff voltage to 4.5 and even 4.6 V for achieving a higher energy density. However, reports about the spat ...
DOI:
10.1039/d0ta09931g

6. Structural Revision of Guttiferone F and 30-epi-Cambogin

Author:
Zheng, Dan; Jiang, Jia-Ming; Chen, Si-Min; Wan, Shi-Jie; Ren, Han-Gui; Chen, Gan; Xu, Gang; Zhou, Hua; Zhang, Hong; Xu, Hong-Xi
Source:
Journal of natural products 2021 v.84 no.4 pp. 1397-1402
ISSN:
1520-6025
Subject:
chemical analysis,   etc   ; X-radiation; acids; journals;     Show all 4 Subjects
Abstract:
... Guttiferone F, a natural polyprenylated polycyclic acylphloroglucinol, was originally assigned as the 30-epimer of garcinol by NMR data analyses. Conversion of guttiferone F in the presence of acid afforded its cyclized form (2a), which was previously assigned as 30-epi-cambogin. However, the absolute configurations of guttiferone F and 2a have not been determined. Reinvestigation of the structure ...
DOI:
10.1021/acs.jnatprod.0c01031

7. E-cigarette aerosol collection using converging and straight tubing Sections: Physical mechanisms

Author:
Hilpert, Markus; Ilievski, Vesna; Hsu, Shao-Yiu; Rule, Ana M.; Olmedo, Pablo; Drazer, German
Source:
Journal of colloid and interface science 2021 v.584 pp. 804-815
ISSN:
0021-9797
Subject:
chemical analysis,   etc   ; aerosols; electronic equipment; geometry;     Show all 4 Subjects
Abstract:
... Identification and quantification of harmful chemicals in e-cigarette aerosol requires collecting the aerosolized e-liquid for chemical analysis. In 2016, Olmedo at al. empirically developed a simple method for aerosol collection by directing the aerosol through a sequence of alternating straight and converging tubing sections, which drain the recovered e-liquid into a collection vial. The tubing ...
DOI:
10.1016/j.jcis.2020.10.011

8. Hypersound-Assisted Size Sorting of Microparticles on Inkjet-Patterned Protein Films

Author:
Gopalakrishnan, Sanjana; Pan, Shuting; Fernandez, Ann; Lee, Jonathan; Bai, Yang; Wang, Li-Sheng; Thayumanavan, S.; Duan, Xuexin; Rotello, Vincent M.
Source:
Langmuir 2021 v.37 no.8 pp. 2826-2832
ISSN:
1520-5827
Subject:
chemical analysis,   etc   ; acoustics; diagnostic techniques; hydrodynamics; silica;     Show all 5 Subjects
Abstract:
... Hydrodynamic approaches are important for biomedical diagnostics, chemical analysis, and a broad range of industrial applications. Size-based separation and sorting is an important tool for these applications. We report the integration of hypersound technology with patterned protein films to provide efficient sorting of microparticles based on particle charge and size. We employed a hypersonic res ...
DOI:
10.1021/acs.langmuir.0c03598

9. Theoretical and field evaluation of a PM2.5 high-volume impactor inlet design

Author:
Patel, Prashant; Aggarwal, Shankar G.; Tsai, Chuen-Jinn; Okuda, Tomoaki
Source:
Atmospheric environment 2021 v.244 pp. 117811
ISSN:
1352-2310
Subject:
chemical analysis,   etc   ; air; bioassays; environment; toxicology; uncertainty;     Show all 6 Subjects
Abstract:
... A PM₂.₅ high-volume impactor (HVI) sampler is developed, which has a flow rate of 1130 L per minute (lpm) (1.13 m³/min) and in it, the filter size used is of 8 inch × 10 inch. The major advantages of this sampler as compared to other low-volume sampler (flow rate 16.67 lpm) are lower uncertainty in mass measurement, higher PM₂.₅ mass collection and lesser sampling time. To develop this PM₂.₅ HVI s ...
DOI:
10.1016/j.atmosenv.2020.117811

10. Chemical instrumental analysis versus human evaluation to measure sensory properties of dairy products: What is fit for purpose?

Author:
Andrewes, Paul; Bullock, Shannon; Turnbull, Robyn; Coolbear, Tim
Source:
International dairy journal 2021 v.121 pp. 105098
ISSN:
0958-6946
Subject:
chemical analysis,   etc   ; humans; mechanics; product development; sensory evaluation;     Show all 5 Subjects
Abstract:
... Human sensory analysis is often simplistically and erroneously labelled “subjective”; this is then used to justify the attempted application of a range of instrumental methods to achieve the same purported measurement end points. However, there are no instrumental substitutes for human sensory analysis to measure human perception. In this review, fundamental considerations for any analyses are fir ...
DOI:
10.1016/j.idairyj.2021.105098

11. Comprehensive characterization of tire and road wear particles in highway tunnel road dust by use of size and density fractionation

Author:
Klöckner, Philipp; Seiwert, Bettina; Weyrauch, Steffen; Escher, Beate I.; Reemtsma, Thorsten; Wagner, Stephan
Source:
Chemosphere 2021 v.279 pp. 130530
ISSN:
0045-6535
Subject:
chemical analysis,   etc   ; dust; fractionation; oxidative stress; solvents; traffic;     Show all 6 Subjects
Abstract:
... Tire and road wear particles (TRWPs) are a major component of non-exhaust traffic emissions, but knowledge about their physico-chemical properties is limited. Road dust of a highway tunnel was fractionated by size and density, and fractions were analyzed for TRWPs, metals, seven tire tread indicator chemicals (benzothiazoles, 6-PPD and DPG) and effects in in-vitro bioassays. TRWP content in tunnel ...
DOI:
10.1016/j.chemosphere.2021.130530

12. Aerodynamic resuspension and contact removal of energetic particles from smooth, rough, and fibrous surfaces

Author:
Kottapalli, Kalyan; Novosselov, Igor V.
Source:
Talanta 2021 v.231 pp. 122356
ISSN:
0039-9140
Subject:
chemical analysis,   etc   ; aerodynamics; chemical species; explosives; shear stress; uncertainty;     Show all 6 Subjects
Abstract:
... Surface sampling for trace explosives residues is a critical step in the security screening in which microparticles are collected for subsequent chemical analysis. The current surface swabbing approach suffers from limited sampling area coverage, uncertainty in harvesting efficiencies, and user bias. Non-contact sampling has received interest due to its ability to interrogate large surface areas w ...
DOI:
10.1016/j.talanta.2021.122356

13. Spatial distribution of total polyphenols in multi-type of tea using near-infrared hyperspectral imaging

Author:
Wang, Yujie; Liu, Ying; Chen, Yuyu; Cui, Qingqing; Li, Luqing; Ning, Jingming; Zhang, Zhengzhu
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2021 v.148 pp. 111737
ISSN:
0023-6438
Subject:
chemical analysis,   etc   ; calibration; models; nondestructive methods; polyphenols; prediction; taste; tea;     Show all 8 Subjects
Abstract:
... Polyphenols are the key taste and health components of tea. Typically, chemical analysis is used to determine the total polyphenol (TP) content of tea. However, this process is time consuming. In this study, the TP content of six tea types, namely green, white, yellow, oolong, black, and dark, was assessed using near-infrared hyperspectral imaging. Here, 100% accuracy was achieved for both the cal ...
DOI:
10.1016/j.lwt.2021.111737

14. Development and Validation of a Method to Simultaneously Determine Multiple Sterols in Diversiform Food Substrates with UPLC-MS/MS

Author:
Han, Chenggang; Zhou, Hui; Wu, Wei; Chen, Xuemei; Li, Huaiping; Li, Yanfang; Feng, DeJian
Source:
Food analytical methods 2021 v.14 no.6 pp. 1202-1215
ISSN:
1936-9751
Subject:
chemical analysis,   etc   ; acid hydrolysis; detection limit; labor; sterols;     Show all 5 Subjects
Abstract:
... Sterols play an essential part in physiological activities of almost all creatures. However, there is a lack of a widely applicable routine method to investigate various sterols with both saturated and unsaturated forms in diversiform food materials. In this study, a new UPLC-MS/MS method with wider extensive applicability has been developed to fill this blank, which is considered time and cost sa ...
DOI:
10.1007/s12161-020-01962-6

15. Evaluation of dry-cured ham pastiness through rheological measurements of aqueous extracts obtained in vitro mimicking the mastication process

Author:
Coll-Brasas, E.; Laguna, L.; Tárrega, A.; Arnau, J.; Claret, A.; Fulladosa, E.
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2021 v.145 pp. 111272
ISSN:
0023-6438
Subject:
chemical analysis,   etc   ; cured meats; ham; mastication; rheology; saliva; temperature; viscosity;     Show all 8 Subjects
Abstract:
... Pastiness is a dry-cured ham defect that can be determined by sensory and chemical analysis. Since pastiness produces an increase of saliva viscosity, rheology might be useful to instrumentally evaluate this defect. The aim of this study was to evaluate the rheological behaviour of water extracts obtained in vitro mimicking the mastication of dry-cured ham samples with different pastiness intensit ...
DOI:
10.1016/j.lwt.2021.111272

16. Hibiscus sabdariffa, a Treatment for Uncontrolled Hypertension. Pilot Comparative Intervention

Author:
Al-Anbaki, Marwah; Cavin, Anne-Laure; Nogueira, Renata Campos; Taslimi, Jaafar; Ali, Hayder; Najem, Mohammed; Shukur Mahmood, Mustafa; Abdullah Khaleel, Ibrahim; Saad Mohammed, Abdulqader; Ramadhan Hasan, Hasan; Marcourt, Laurence; Félix, Fabien; Vinh Tri Low-Der’s, Nicolas; Ferreira Queiroz, Emerson; Wolfender, Jean-Luc; Watissée, Marie; Graz, Bertrand
Source:
Plants 2021 v.10 no.5
ISSN:
2223-7747
Subject:
chemical analysis,   etc   ; Hibiscus sabdariffa; anthocyanins; drug therapy; foods; hypertension; Iraq;     Show all 7 Subjects
Abstract:
... In Iraq, in 2019, there were about 1.4 million Internally Displaced Persons (IDP); medical treatments were often interrupted. The feasibility of using Hibiscus sabdariffa (HS) decoction to curb hypertension was evaluated. A multicentric comparative pilot intervention for 121 participants with high blood pressure (BP) (≥140/90 mmHg) was conducted. Participants of the intervention group (with or wit ...
DOI:
10.3390/plants10051018

17. A Performance Evaluation of Vis/NIR Hyperspectral Imaging to Predict Curcumin Concentration in Fresh Turmeric Rhizomes

Author:
Farrar, Michael B.; Wallace, Helen M.; Brooks, Peter; Yule, Catherine M.; Tahmasbian, Iman; Dunn, Peter K.; Hosseini Bai, Shahla
Source:
Remote Sensing 2021 v.13 no.9
ISSN:
2072-4292
Subject:
chemical analysis,   etc   ; Curcuma longa; curcumin; hyperspectral imagery; prediction; rhizomes; turmeric;     Show all 7 Subjects
Abstract:
... Hyperspectral image (HSI) analysis has the potential to estimate organic compounds in plants and foods. Curcumin is an important compound used to treat a range of medical conditions. Therefore, a method to rapidly determine rhizomes with high curcumin content on-farm would be of significant advantage for farmers. Curcumin content of rhizomes varies within, and between varieties but current chemica ...
DOI:
10.3390/rs13091807

18. Root foraging and selenium uptake in the Australian hyperaccumulator Neptunia amplexicaulis and non‐accumulator Neptunia gracilis

Author:
Pinto Irish, Katherine; Harvey, Maggie-Anne; Erskine, Peter D.; van der Ent, Antony
Source:
Plant and soil 2021 v.462 no.1-2 pp. 219-233
ISSN:
0032-079X
Subject:
chemical analysis,   etc   ; Neptunia; biomass; hyperaccumulators; selenium; soil; sympatry; Queensland;     Show all 8 Subjects
Abstract:
... BACKGROUND AND AIMS: Neptunia amplexicaulis, endemic to Central Queensland (Australia), is one of the strongest selenium (Se) hyperaccumulators known globally, capable of accumulating up to 13 600 µg Se g⁻ ¹ in its leaves. This work aimed to elucidate root foraging in response to Se in N. amplexicaulis applied in two different chemical forms and concentrations compared to the sympatric non-accumul ...
DOI:
10.1007/s11104-021-04843-x

19. Visualising lignin quantitatively in plant cell walls by micro-Raman spectroscopy

Author:
Zhang, Xun
Source:
RSC advances 2021 v.11 no.22 pp. 13124-13129
ISSN:
2046-2069
Subject:
chemical analysis,   etc   ; Raman spectroscopy; cell walls; delignification; lignin;     Show all 5 Subjects
Abstract:
... As a main component in plant cell wall, lignin is commonly determined by wet chemical analysis which only provides general information rather than specifics for different cell wall layers. To address this issue, we attempted to use micro-Raman spectroscopy for quantitative visualisation of the lignin in various cell wall layers during delignification. ...
DOI:
10.1039/d1ra01825f

20. Assessment of Health Claims Related to Folic Acid in Food Supplements for Pregnant Women According to the European Regulation

Author:
Domínguez, Laura; Fernández-Ruiz, Virginia; Morales, Patricia; Sánchez-Mata, María-Cortes; Cámara, Montaña
Source:
Nutrients 2021 v.13 no.3
ISSN:
2072-6643
Subject:
chemical analysis,   etc   ; compliance; embryogenesis; folic acid; market analysis; Spain;     Show all 6 Subjects
Abstract:
... Pregnant women are a vulnerable group with increased nutritional requirements. The daily intake of folic acid, a crucial vitamin for embryonic development, must be reinforced through supplementation, as sometimes diets are not well equilibrated. As consumers increasingly rely on food supplements, it is vital to properly inform them about the health benefits provided by supplements’ consumption to ...
DOI:
10.3390/nu13030937