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1. Correction: l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants

Author:
Cao, Wenrui; Lyu, Lai; Deng, Kanglan; Lu, Chao; Hu, Chun
Source:
Journal of materials chemistry A 2020 v.8 no.4 pp. 2147
ISSN:
2050-7496
Subject:
ascorbic acid,   etc   ; nanoflowers; oxidation; pollutants;     Show all 4 Subjects
Abstract:
... Correction for ‘l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants’ by Wenrui Cao et al., J. Mater. Chem. A, 2020, DOI: 10.1039/c9ta10284a. ...
DOI:
10.1039/c9ta90304f

2. Determination of the Antioxidant Capacity of Pharmaceuticals by Potentiometry: Indicators of Measurement Accuracy

Author:
Ivanova, A. V.; Gerasimova, E. L.; Gazizullina, E. R.; Timina, D. S.; Gerasimova, N. L.; Sobina, A. V.; Shalygina, Zh. V.; Krasheninina, M. P.
Source:
Journal of analytical chemistry 2020 v.75 no.3 pp. 378-383
ISSN:
1061-9348
Subject:
ascorbic acid,   etc   ; antioxidant activity; drugs; medicinal plants;     Show all 4 Subjects
Abstract:
... The antioxidant capacity (AOC) of water–alcohol tinctures of medicinal plant materials, vitamins, and vitamin complexes was investigated. The accuracy indicators for determining the antioxidant capacity of these samples are found; the accuracy of the measurement results is examined using a sample of ascorbic acid with a known concentration of the main component. The relative measurement error of t ...
DOI:
10.1134/S1061934820030077

3. Sulfide-binding to Cu(II) in wine: Impact on oxygen consumption rates

Author:
Kontoudakis, Nikolaos; Clark, Andrew C.
Source:
Food chemistry 2020 v.316 pp. 126352
ISSN:
0308-8146
Subject:
ascorbic acid,   etc   ; copper; oxygen; oxygen consumption; sulfides; white wines;     Show all 6 Subjects
Abstract:
... This study investigates the relationship between the two main forms of Cu in wine and their impact on the rate of oxygen consumption. The Cu forms were differentiated by medium exchange constant current stripping potentiometry, which classified the Cu as either bound to sulfide or not. Oxygen consumption rates were determined in red, white and model wines after saturation with oxygen. The results ...
DOI:
10.1016/j.foodchem.2020.126352

4. Enhancement of chemical stability of curcumin-enriched oil-in-water emulsions: Impact of antioxidant type and concentration

Author:
Kharat, Mahesh; Skrzynski, Matt; Decker, Eric Andrew; McClements, David Julian
Source:
Food chemistry 2020 v.320 pp. 126653
ISSN:
0308-8146
Subject:
ascorbic acid,   etc   ; alpha-tocopherol; antioxidants; beverages; bioactive properties; chemical degradation; curcumin; emulsions; oils; palmitates; water solubility;     Show all 11 Subjects
Abstract:
... Curcumin is claimed to have many health benefits, but it has low chemical stability. In this study, the influence of food-grade antioxidants on the chemical degradation of curcumin-enriched oil-in-water emulsions was examined. The curcumin degradation rate and extent depended on antioxidant type. The water-soluble antioxidants were more effective at protecting curcumin from degradation than the oi ...
DOI:
10.1016/j.foodchem.2020.126653

5. General synthesis of carbon and oxygen dual-doped graphitic carbon nitride via copolymerization for non-photochemical oxidation of organic pollutant

Author:
Zhu, Yue; Chen, Zhenhuan; Gao, Yaowen; Hu, Chun
Source:
Journal of hazardous materials 2020 v.394 pp. 122578
ISSN:
0304-3894
Subject:
ascorbic acid,   etc   ; carbon nitride; catalysts; catalytic activity; copolymerization; graphene; irradiation; oxidation; oxygen; pollutants; remediation; urea;     Show all 12 Subjects
Abstract:
... Earth-abundant, environmental-benign and durable catalysts are of paramount importance for remediation of organic pollutants, and graphitic carbon nitride (g-C₃N₄) is a promising nonmetallic material for this application. However, the catalytic oxidation on g-C₃N₄ suffers from low efficiency because of its chemical inertness if not irradiated with light. Herein, we develop a facile copolymerizatio ...
DOI:
10.1016/j.jhazmat.2020.122578

6. Determination of ascorbic acid and ascorbate oxidase based on quaternary CuInZnS QDs/thiochrome ratiometric fluorescence sensing system

Author:
Zhang, Jiabao; Liu, Jinying; Wang, Mengke; Su, Xingguang
Source:
Talanta 2020 v.214 pp. 120814
ISSN:
0039-9140
Subject:
ascorbic acid,   etc   ; ascorbate oxidase; blood serum; detection limit; electrostatic interactions; fluorescence; oxidation; potassium permanganate; thiamin; wavelengths;     Show all 10 Subjects
Abstract:
... In this work, a rapid and sensitive ratiometric fluorescence sensing method for the detection of ascorbic acid (AA) and ascorbate oxidase (AA-Ox) was developed. MPA capped quaternary CuInZnS QDs with fluorescence emission wavelength of 580 nm was synthesized by hydrothermal synthesis. Thiamine (VB1) can be oxidized by KMnO₄ to yield thiochrome (oxVB1) with a fluorescence emission peak at 459 nm. S ...
DOI:
10.1016/j.talanta.2020.120814

7. Effect of temperature on stability of anthocyanins, ascorbic acid and color in strawberry and raspberry jams

Author:
Martinsen, Berit Karoline; Aaby, Kjersti; Skrede, Grete
Source:
Food chemistry 2020 v.316 pp. 126297
ISSN:
0308-8146
Subject:
ascorbic acid,   etc   ; anthocyanins; bioactive compounds; color; jams; phenolic compounds; raspberries; storage temperature; storage time; strawberries; variance;     Show all 11 Subjects
Abstract:
... Strawberry (cv. Senga Sengana) and raspberry (cv. Veten) were processed into jams at 60, 85 or 93 °C and stored at 4 or 23 °C for 8 and 16 weeks. High processing temperature reduced ascorbic acid, total monomeric anthocyanins (TMA) and total phenolics (TP) in strawberries (p<0.05), but not in raspberries. Processing temperature had minor effect on bioactive compounds in the jams during storage (<1 ...
DOI:
10.1016/j.foodchem.2020.126297

8. Development of a method to measure laccase activity on methoxyphenolic food ingredients and isomers

Author:
Manzano-Nicolas, Jesus; Marin-Iniesta, Fulgencio; Taboada-Rodriguez, Amaury; Garcia-Canovas, Francisco; Tudela-Serrano, Jose; Muñoz-Muñoz, Jose Luis
Source:
International journal of biological macromolecules 2020 v.151 pp. 1099-1107
ISSN:
0141-8130
Subject:
ascorbic acid,   etc   ; Coriolus versicolor; catalytic activity; enzyme activity; free radicals; guaiacol; ingredients; isomers; laccase; oxidation;     Show all 10 Subjects
Abstract:
... We studied the laccase-catalysed oxygenation of methoxyphenolic food ingredients, such as 2-methoxyphenol (guaiacol) and 2,6-dimethoxyphenol (syringol), isomers such as 3- and 4-methoxyphenol, and 2,3-, 3,4- and 3,5-dimethoxyphenol. These methoxyphenolic substrates generate unstable free radicals, which leads to the erroneous determination of steady state rates. The addition of small quantities of ...
DOI:
10.1016/j.ijbiomac.2019.10.152

9. Fast room temperature cloud point extraction procedure for spectrophotometric determination of phosphate in water samples

Author:
Snigur, Denys; Chebotarev, Alexander; Bulat, Kseniia; Duboviy, Vitaliy
Source:
Analytical biochemistry 2020 v.597 pp. 113671
ISSN:
0003-2697
Subject:
ascorbic acid,   etc   ; absorbance; ambient temperature; ammonium; calibration; ethanol; octoxynol; phosphates; surfactants;     Show all 9 Subjects
Abstract:
... A novel fast room temperature cloud point extraction (RT-CPE) procedure for preconcentration and spectrophotometric determination of phosphate based on the heteropoly blue formation was developed. The proposed method includes the formation of yellow molybdoantymonatophosphoric heteropoly complex, its extraction into Triton X-100 micellar phase obtained at room temperature and reduction of heteropo ...
DOI:
10.1016/j.ab.2020.113671

10. Electrochemical restructuring of Gold electrodes with redox active species to create electrocatalytically active nanostructured surfaces

Author:
Lertsathitphong, Panjaphong; O’Mullane, Anthony P.; Lertanantawong, Benchaporn
Source:
Colloids and surfaces 2020 v.592 pp. 124580
ISSN:
0927-7757
Subject:
ascorbic acid,   etc   ; catalytic activity; chlorides; electrochemistry; electrodes; electrolytes; ferrocenes; glucose; gold; methanol; nanogold; oxidation; ruthenium; voltammetry;     Show all 14 Subjects
Abstract:
... Electrochemical potential cycling of gold electrodes in commonly used redox active species to produce a nanostructured surface is introduced. A commercially available gold electrode when cycled in three redox active species including hexaammine ruthenium chloride, ferrocene methanol and ferricyanide shows rapid conversion of the surface into a nanostructured form within 50 cycles which usually req ...
DOI:
10.1016/j.colsurfa.2020.124580

11. High-humidity hot air impingement blanching (HHAIB) efficiently inactivates enzymes, enhances extraction of phytochemicals and mitigates brown actions of chili pepper

Author:
Wang, Hui; Zhang, Qian; Mujumdar, A.S.; Fang, Xiao-Ming; Wang, Jun; Pei, Yu-Peng; Wu, Wei; Zielinska, Magdalena; Xiao, Hong-Wei
Source:
Food control 2020 v.111 pp. 107050
ISSN:
0956-7135
Subject:
ascorbic acid,   etc   ; air; blanching; hot peppers; pepper; peroxidase; phytochemicals; relative humidity; response surface methodology; temperature;     Show all 10 Subjects
Abstract:
... In current work, high-humidity hot air impingement blanching (HHAIB) was employed to inactivate peroxidase enzymes (POD) of chili pepper under three independent variables, namely blanching temperature (105, 110, and 115 °C), relative humidity (20%, 30%, and 40%), and blanching time (30, 60, and 90 s). Response surface methodology (RSM) was used to optimize the blanching conditions based on product ...
DOI:
10.1016/j.foodcont.2019.107050

12. Green Synthesis of 3D Chemically Functionalized Graphene Hydrogel for High-Performance NH₃ and NO₂ Detection at Room Temperature

Author:
Wu, Jin; Wei, Yaoming; Ding, Haojun; Wu, Zixuan; Yang, Xing; Li, Zhenyi; Huang, Wenxi; Xie, Xi; Tao, Kai; Wang, Xiaotian
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 20623-20632
ISSN:
1944-8252
Subject:
ascorbic acid,   etc   ; ambient temperature; ammonia; biodegradability; detection limit; graphene; hydrogels; nitrogen dioxide; toxic substances;     Show all 9 Subjects
Abstract:
... To address the low gas sensitivity of pristine graphene (Gr), chemical modification of Gr has been proved as a promising route. However, the existing chemical functionalization method imposes the utilization of toxic chemicals, increasing the safety risk. Herein, vitamin C (VC)-modified reduced graphene hydrogel (V-RGOH) is synthesized via a green and facile self-assembly process with the assistan ...
DOI:
10.1021/acsami.0c00578

13. Mechanical strength, structural and hydration properties of ethanol-treated starch tablets and their impact on the release of active ingredients

Author:
Sarifudin, Achmat; Soontaranon, Siriwat; Peerapattana, Jomjai; Tongta, Sunanta
Source:
International journal of biological macromolecules 2020 v.149 pp. 541-551
ISSN:
0141-8130
Subject:
ascorbic acid,   etc   ; active ingredients; cassava starch; crushing; dodecanoic acid; ethanol; mixing; solubilization; starch; strength (mechanics); temperature;     Show all 11 Subjects
Abstract:
... Ethanol-treated starch (ETS) shows potentiality to be used for binder of pharmaceutical tablets. This study was aimed to evaluate the mechanical strength, structural and hydration properties of ETS tablets and ETS tablets containing lauric acid and ascorbic acid and their release behavior. ETS was prepared from cassava starch at the temperatures of 80, 90, and 100 °C. The active compounds were ent ...
DOI:
10.1016/j.ijbiomac.2020.01.286

14. Effect of antioxidant additives on oxides of nitrogen (NOx) emission reduction from Annona biodiesel operated diesel engine

Author:
Rajendran, Silambarasan
Source:
Renewable energy 2020 v.148 pp. 1321-1326
ISSN:
0960-1481
Subject:
ascorbic acid,   etc   ; Annona; acetates; additives; antioxidants; biodiesel; diesel engines; nitrogen oxides;     Show all 8 Subjects
Abstract:
... In this present study experimental investigation has been carried out to mitigate the NOₓ emission in 20% Annona biodiesel-diesel blend (A20) operated diesel engine by addition of antioxidant additives. The antioxidant additives used in the present study are p-phenylenediamine (PPDA), A-tocopherol acetate (AT) and l-ascorbic acid (LA). The addition of antioxidant additives to A20 blend did not cau ...
DOI:
10.1016/j.renene.2019.10.104

15. Photo-stability of lutein in surfactant-free lutein-zein composite colloidal particles

Author:
de Boer, Frankjen Ynske; Imhof, Arnout; Velikov, Krassimir Petkov
Source:
Food chemistry: X 2020 v.5 pp. 100071
ISSN:
2590-1575
Subject:
ascorbic acid,   etc   ; antioxidants; colloids; dispersions; encapsulation; light scattering; lutein; nanoparticles; particle size; solvents; zein;     Show all 11 Subjects
Abstract:
... The ability of nanoparticles from the plant protein zein to protect lutein from light degradation was studied under various conditions. Lutein-zein nanoparticles were synthesized, after zein purification, by anti-solvent precipitation. Particle sizes, ranging from 25 to 75 nm, measured by dynamic light scattering, were tuned by varying zein concentrations in the solvent phase (before anti-solvent ...
DOI:
10.1016/j.fochx.2019.100071
PubMed:
31867578
PubMed Central:
PMC6906682

16. Effect of Cooking Methods on Ascorbic Acid Destruction of Green Leafy Vegetables

Author:
Hailemariam, Gebrehana Ashine; Wudineh, Tadele Andargie
Source:
Journal of food quality 2020 v.2020
ISSN:
1745-4557
Subject:
ascorbic acid,   etc   ; Brassica carinata; Brassica oleracea; cabbage; collard greens; heat treatment; pressure cooking; spectrophotometers; wavelengths;     Show all 9 Subjects
Abstract:
... Ascorbic acid is highly sensitive vitamin to various modes of cooking processes. Ethiopian green collards (Brassica carinata), locally called Ye’abesha Gomen, and cabbage (Brassica oleracea) are important green vegetables for ascorbic acid source in the country. The rate of ascorbic acid degradation in cabbage and Ethiopian green collard was studied employing two processing methods: open-pan and p ...
DOI:
10.1155/2020/8908670

17. The influence of process parameters on the quality of dried agricultural products determined using the cumulated thermal load

Author:
Jödicke, K.; Arendt, S.; Hofacker, W.; Speckle, W.
Source:
Drying technology 2020 v.38 no.3 pp. 321-332
ISSN:
1532-2300
Subject:
ascorbic acid,   etc   ; air temperature; color; drying; energy; mangoes; pineapples; polyphenols; relative humidity;     Show all 9 Subjects
Abstract:
... The cumulated thermal load (CTL) combines the effects of temperature and drying time on the quality of dried products and therefore highly improves the comparability of different drying processes. To make it more practicable, it was adjusted in this work. The adjusted CTLₐd was developed to better match the obtained results on an experimental level. Since the CTLₐd also stands in relation to the a ...
DOI:
10.1080/07373937.2019.1568254

18. Prevention of damage caused by corona discharge-generated reactive oxygen species under electrostatic aerosol-to-hydrosol sampling

Author:
Piri, Amin; Kim, Hyeong Rae; Hwang, Jungho
Source:
Journal of hazardous materials 2020 v.384 pp. 121477
ISSN:
0304-3894
Subject:
ascorbic acid,   etc   ; DNA; airborne pathogens; distillates; protective effect; reactive oxygen species; sampling;     Show all 7 Subjects
Abstract:
... Human exposure to airborne pathogens is a major cause of health concerns; therefore, it is imperative to monitor, sample, and detect airborne bio-particles. Among various bio-aerosol sampling methods, electrostatic precipitation (EP) is an efficient technique for capturing bio-aerosols as hydrosols due to a lower pressure drop and less damage to sensitive bio-particles. Corona discharge is the mai ...
DOI:
10.1016/j.jhazmat.2019.121477

19. Tetraphenylenthene-Based Conjugated Microporous Polymer for Aggregation-Induced Electrochemiluminescence

Author:
Cui, Lin; Yu, Shilong; Gao, Wenqiang; Zhang, Xiaomei; Deng, Shengyuan; Zhang, Chun-yang
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 7966-7973
ISSN:
1944-8252
Subject:
ascorbic acid,   etc   ; dopamine; electrochemiluminescence; energy; polymers; porous media; quinones; uric acid;     Show all 8 Subjects
Abstract:
... We demonstrate the aggregation-induced electrochemiluminescence (AIECL) generated by 1,1,2,2-tetrakis(4-bromophenyl)ethane (TBPE)-based conjugated microporous polymers (TBPE-CMPs) and its biosensing application. We synthesized three TBPE-CMPs (i.e., TBPE-CMP-1, -2, -3) using three different molecules including tris(4-ethynylphenyl)amine (TEPA), 4,4′-diethynylbiphenyl (DEP), and 2,4,6-tris(4-ethyny ...
DOI:
10.1021/acsami.9b21943

20. l- Ascorbic acid alkyl esters action on stratum corneum model membranes: An insight into the mechanism for enhanced skin permeation

Author:
Zulueta Díaz, Yenisleidy de las Mercedes; Menghi, Karen; Guerrero, Maria Laura; Nocelli, Natalia; Fanani, María Laura
Source:
Colloids and surfaces 2020 v.185 pp. 110621
ISSN:
0927-7765
Subject:
ascorbic acid,   etc   ; compressibility; dose response; esters; lipophilicity; microscopy; models; oleic acid; permeability; rheological properties; stearic acid;     Show all 11 Subjects
Abstract:
... L-ascorbic acid alkyl esters (ASCn) are lipophilic forms of vitamin C, which act as skin permeation enhancers. We investigated the physical changes induced by incorporating ASCn into stratum corneum (SC) lipid membranes and correlated this with the mechanism proposed in the literature for skin permeation enhancement phenomena. We used lipid monolayers to explore the 2D structure and elasticity of ...
DOI:
10.1016/j.colsurfb.2019.110621