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1. Nitrosamines in sucuk: Effects of black pepper, sodium ascorbate and cooking level

Author:
Sallan, Selen; Kaban, Güzin; Kaya, Mükerrem
Source:
Food chemistry 2019 v.288 pp. 341-346
ISSN:
0308-8146
Subject:
ascorbic acid,   etc   ; black pepper; cooking; nitrites; nitrosopyrrolidine;     Show all 5 Subjects
Abstract:
... This study determined effects of different black pepper levels (5, 10 or 15 g kg−1), sodium ascorbate usage and cooking level (raw, medium, medium well and well done) on nitrosamine formation in sucuk (a kind of dry fermented sausage). Sodium ascorbate decreased residual nitrite considerably. Cooking level had a very significant effect on nitrosodimethylamine (NDMA), nitrosopyrrolidine (NPYR) and ...
DOI:
10.1016/j.foodchem.2019.02.129

2. Stability of 5-methyltetrahydrofolate in fortified apple and carrot purées

Author:
Herbig, Anna-Lena; Delchier, Nicolas; Striegel, Lisa; Rychlik, Michael; Renard, Catherine M.G.C.
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2019 v.107 pp. 158-163
ISSN:
0023-6438
Subject:
ascorbic acid,   etc   ; apples; buffers; carrots; folic acid; formates; pH; temperature;     Show all 8 Subjects
Abstract:
... 5-Methyltetrahydrofolate, the naturally abundant folate vitamer, has been proposed as an alternative to folic acid for fortification. However, it is less stable than folic acid. In a formate buffer (pH 3.5), folic acid was entirely preserved after heating the solution for 3 h at 80 °C. In contrast, 5-methyltetrahydrofolate was completely degraded in less than 15 min. As in the buffer, 5-methyltetr ...
DOI:
10.1016/j.lwt.2019.03.010

3. Fast and flexible strategy to produce electrochemical paper-based analytical devices using a craft cutter printer to create wax barrier and screen-printed electrodes

Author:
de Oliveira, Tássia Regina; Fonseca, Wilson Tiago; de Oliveira Setti, Grazielle; Faria, Ronaldo Censi
Source:
Talanta 2019 v.195 pp. 480-489
ISSN:
0039-9140
Subject:
ascorbic acid,   etc   ; acetaminophen; caffeine; cutting; detection limit; electrochemistry; electrodes; hydrophobicity;     Show all 8 Subjects
Abstract:
... This paper describes a simple, low-cost, and highly flexible rapid prototyping method to construct electrochemical paper-based analytical device (ePAD) for multiplexed analyte determinations. The ePAD was composed of two electrochemical cell (EC) compartments, separated by hydrophobic barriers of wax, and screen-printed electrodes (SPEs) deposited directly over the surface of the filter paper. The ...
DOI:
10.1016/j.talanta.2018.11.047

4. Redox-switchable atom transfer radical polymerization

Author:
Dadashi-Silab, Sajjad; Lorandi, Francesca; Fantin, Marco; Matyjaszewski, Krzysztof
Source:
Chemical communications 2019 v.55 no.5 pp. 612-615
ISSN:
1364-548X
Subject:
ascorbic acid,   etc   ; catalysts; copper; oxidants; oxidation; oxygen; polymerization; polymers;     Show all 8 Subjects
Abstract:
... Temporal control in atom transfer radical polymerization (ATRP) relies on modulating the oxidation state of a copper catalyst, as polymer chains are activated by L/Cuᴵ and deactivated by L/Cuᴵᴵ. (Re)generation of L/Cuᴵ activator has been achieved by applying a multitude of external stimuli. However, switching the Cu catalyst off by oxidizing to L/Cuᴵᴵ through external chemical stimuli has not yet ...
DOI:
10.1039/c8cc09209e

5. Mechanisms non-enzymatic browning in orange juice during storage

Author:
Paravisini, Laurianne; Peterson, Devin G.
Source:
Food chemistry 2019 v.289 pp. 320-327
ISSN:
0308-8146
Subject:
ascorbic acid,   etc   ; Maillard reaction; color; fructose; glutamine; orange juice; refrigeration; tryptophan;     Show all 8 Subjects
Abstract:
... The role of Reactive Carbonyl Species (RCS) derived from the Maillard reaction and ascorbic acid degradation on brown color formation was investigated in orange juice during storage. Eight RCS were monitored in aseptic juice over an 8-week period under refrigerated (4 °C) and accelerated conditions (35 °C). Significant changes in RCS concentrations were reported and positively correlated with colo ...
DOI:
10.1016/j.foodchem.2019.03.049

6. Restoring fresh texture in cooked aged rice with reducing agents

Author:
Diao, Meimei; Guo, Yubao; Tian, Wennan; Tu, Kang; Guan, Lingjuan; Wei, Ming
Source:
Food research international 2019 v.121 pp. 84-90
ISSN:
0963-9969
Subject:
ascorbic acid,   etc   ; gelatinization; hardness; particle size; reducing agents; rice; sodium sulfite; starch granules; stickiness; texture;     Show all 10 Subjects
Abstract:
... Effects of ascorbic acid and sodium sulfite on texture of cooked aged rice were researched in this study. Hardness increase and stickiness reduction are common for cooked aged rice. The texture of cooked aged rice was significantly changed approaching to fresh rice by both reducing agents despite of sulfur-containing or not (p < 0.05), and the values of hardness, stickiness and stickiness/hardness ...
DOI:
10.1016/j.foodres.2019.03.023

7. The expression of TET3 regulated cell proliferation in HepG2 cells

Author:
Zhong, Xiaowei; Liu, Dianfeng; Hao, Yang; Li, Chengshun; Hao, Jindong; Lin, Chao; Shi, Shuming; Wang, Dongxu
Source:
Gene 2019 v.698 pp. 113-119
ISSN:
0378-1119
Subject:
ascorbic acid,   etc   ; cell proliferation; human cell lines; neoplasms; oxidation; proteins; transfection;     Show all 7 Subjects
Abstract:
... Ten-eleven translocation (TET) proteins have been shown to be abnormally expressed in different cancers. To investigate the expression pattern of TET proteins in HepG2 cells, sodium ascorbate was used to treat HepG2 cells. Our results showed that TET1, TET2 and TET3 expression was increased after sodium ascorbate treatment. The TET proteins catalyze the oxidation of 5-methylcytosine (5mC) to 5-hyd ...
DOI:
10.1016/j.gene.2019.02.040

8. CO2 capture and sequestration in stable Ca-oxalate, via Ca-ascorbate promoted green reaction

Author:
Pastero, Linda; Curetti, Nadia; Ortenzi, Marco Aldo; Schiavoni, Marco; Destefanis, Enrico; Pavese, Alessandro
Source:
The Science of the total environment 2019 v.666 pp. 1232-1244
ISSN:
0048-9697
Subject:
ascorbic acid,   etc   ; anthropogenic activities; calcium oxalate; carbon dioxide; crystals; emissions; reducing agents;     Show all 7 Subjects
Abstract:
... The increase in the amount of carbon dioxide (CO2) emissions related to many anthropic activities is a persistent and growing problem. During the last years, many solutions have been set out, none of them being the ultimate one. Investigators agree on the need of a synergic approach to the problem, in terms of many complementary methods of sequestration that, combined with the reduction of product ...
DOI:
10.1016/j.scitotenv.2019.02.114

9. Effect of hyperbaric pressure on the activity of antioxidant enzymes and bioactive compounds of cv. ‘Débora’ tomatoes

Author:
Inestroza-Lizardo, Carlos; Mattiuz, Ben-Hur; da Silva, Josiane Pereira; Voigt, Vanessa; Muniz, Ana Carolina; Pinsetta, José Sidnaldo
Source:
Scientia horticulturae 2019 v.249 pp. 340-346
ISSN:
0304-4238
Subject:
ascorbic acid,   etc   ; ambient temperature; antioxidant activity; bioactive compounds; enzyme activity; fruits; oxidative stress; peroxidase; polyphenols; tomatoes;     Show all 10 Subjects
Abstract:
... The objective of this work was to evaluate the effects of the application of hyperbaric pressures 100 (control), 200, 400, 600 and 800 kPa at ambient temperature (23 ± 1 °C) for 2, 4 or 6 d, followed by 2 d at under ambient conditions (23 °C, 50% RH and 100 kPa), on the activity of antioxidant enzymes and the concentrations of bioactive compounds in cv. ‘Débora’ tomatoes. Between the 2nd and 6th d ...
DOI:
10.1016/j.scienta.2019.02.011

10. A novel BODIPY-based MOF photocatalyst for efficient visible-light-driven hydrogen evolution

Author:
Yang, Heng; Wang, Jinming; Ma, Ji; Yang, Hong; Zhang, Jing; Lv, Kangle; Wen, Lili; Peng, Tianyou
Source:
Journal of materials chemistry A 2019 v.7 no.17 pp. 10439-10445
ISSN:
2050-7496
Subject:
ascorbic acid,   etc   ; coordination polymers; energy conversion; hydrogen production; light; lighting; nanoparticles; photocatalysis; photocatalysts;     Show all 9 Subjects
Abstract:
... Considerable attention has been paid to promising applications of photoactive metal–organic frameworks (MOFs) in visible-light-enhanced hydrogen production. In this study, a pillared-paddlewheel type metal–organic framework [Zn₂(BODIPY)(BPDC)₂]·H₂O (denoted as CCNU-1) featuring BODIPY struts, and capable of efficiently absorbing visible light from 200 to 800 nm, has been fabricated, which is thoug ...
DOI:
10.1039/c9ta02357g

11. Dual-Signaling Amplification Electrochemical Aptasensor Based on Hollow Polymeric Nanospheres for Acetamiprid Detection

Author:
Chen, Peipei; Qiao, Xueying; Liu, Jianhui; Xia, Fangquan; Tian, Dong; Zhou, Changli
Source:
ACS applied materials & interfaces 2019 v.11 no.16 pp. 14560-14566
ISSN:
1944-8252
Subject:
ascorbic acid,   etc   ; acetamiprid; adsorption; aptasensors; detection limit; electrochemistry; monitoring; nanocarriers; nanospheres; oxidation; polyacrylic acid; polyethyleneimine;     Show all 12 Subjects
Abstract:
... In this work, we first reported a dual-signaling electrochemical aptasensor based on layer-by-layer template technology and catalytic amplification for acetamiprid detection. Herein, the signal probe of the ferrocene (Fc)-based hollow polymeric nanospheres (Fc-HPNs) were prepared with repeated electrostatic adsorption between anionic poly(acrylic acid) and hyperbranched cationic polyethylenimine. ...
DOI:
10.1021/acsami.9b00308

12. Study of Bi-directional detection for ascorbic acid and sodium nitrite based on Eu-containing luminescent polyoxometalate

Author:
Fu, Zhijing; Gao, Wenmei; Yu, Tian; Bi, Lihua
Source:
Talanta 2019 v.195 pp. 463-471
ISSN:
0039-9140
Subject:
ascorbic acid,   etc   ; color; detection limit; energy transfer; fluorescence; oxidants; photoluminescence; redox reactions; reducing agents; sodium nitrite;     Show all 10 Subjects
Abstract:
... Eu-containing polyoxometalate K13Eu(SiMoW10O39)2·28H2O (Eu-SiMoW) owns the stimu-chromic and photoluminescence properties. An ingenious test of ascorbic acid (AA) and sodium nitrite (NaNO2) was carried out based on the dual properties of Eu-SiMoW in solutions. First, the redox reaction of Eu-SiMoW and AA generated the blue reduced Eu-SiMoW, accompanied by fluorescence quenching; then the redox rea ...
DOI:
10.1016/j.talanta.2018.11.091

13. Application of hot air‐assisted radio frequency as second stage drying method for mango slices

Author:
Zhang, Hangjin; Gong, Chuting; Wang, Xiaofan; Liao, Meiji; Yue, Jin; Jiao, Shunshan
Source:
Journal of food process engineering 2019 v.42 no.2 pp. e12974
ISSN:
0145-8876
Subject:
ascorbic acid,   etc   ; air temperature; electrodes; heat; mangoes; radio waves; vacuum drying; water content;     Show all 8 Subjects
Abstract:
... This study applied hot air‐assisted RF (HA‐RF) as second stage drying method for mango slices. Hot‐air drying was used as first stage drying to reduce moisture content to about 40% (w.b.), then HA‐RF drying was applied as second stage drying to further reduce moisture content to 18% within 45 min with 4.5 cm sample thickness (hot air temperature: 60 °C, electrode gap: 7.5 cm). The time for the two ...
DOI:
10.1111/jfpe.12974

14. New active package based on titania coated on cardboard for storage of fresh prepared orange juice

Author:
Peter, Anca; Nicula, Camelia; Mihaly‐Cozmuta, Leonard; Mihaly‐Cozmuta, Anca
Source:
Journal of food process engineering 2019 v.42 no.2 pp. e12965
ISSN:
0145-8876
Subject:
ascorbic acid,   etc   ; Fourier transform infrared spectroscopy; cardboard; catalase; coatings; enzyme activity; orange juice; semiconductors; titanium dioxide;     Show all 9 Subjects
Abstract:
... An active package from cardboard coated with titanium dioxide was designed for storage of fresh prepared orange juice. The organoleptical changes of the orange juice were statistically significant and revealed the preservation role of the active cardboard at 4 °C. Statistically significant positive effect on the reducing the rate of ascorbic acid degradation and on the increasing the catalase acti ...
DOI:
10.1111/jfpe.12965

15. Systematic study on the reduction efficiency of ascorbic acid and thiourea on selenate and selenite at high and trace concentrations

Author:
Zhang, Gongli; Gomez, Mario Alberto; Yao, Shuhua; Ma, Xu; Li, Shifen; Cao, Xuan; Zang, Shuyan; Jia, Yongfeng
Source:
Environmental science and pollution research international 2019 v.26 no.10 pp. 10159-10173
ISSN:
0944-1344
Subject:
ascorbic acid,   etc   ; acid mine drainage; drainage; mine tailings; pollutants; selenates; selenites; selenium; sulfur; thiourea;     Show all 10 Subjects
Abstract:
... Selenate (Se(VI)) and selenite (Se(IV)) are common soluble wastewater pollutants in natural and anthropogenic systems. We evaluated the reduction efficiency and removal of low (0.02 and 2 mg/L) and high (20 and 200 mg/L) Se(IV)₍ₐq₎ and Se(VI)₍ₐq₎ concentrations to elemental (Se⁰) via the use of ascorbic acid (AA), thiourea (TH), and a 50–50% mixture. The reduction efficiency of AA with Se(IV)₍ₐq₎ ...
DOI:
10.1007/s11356-019-04383-z

16. Multisyringe flow injection analysis (MSFIA) for the automatic determination of total iron in wines

Author:
Phansi, Piyawan; Danchana, Kaewta; Ferreira, Sergio L.C.; Cerdà, Víctor
Source:
Food chemistry 2019 v.277 pp. 261-266
ISSN:
0308-8146
Subject:
ascorbic acid,   etc   ; absorbance; flow injection analysis; iron; red wines; standard deviation; white wines;     Show all 7 Subjects
Abstract:
... This work presents a multisyringe flow injection analysis (MSFIA) system for the automatic spectrophotometric determination of total iron in wine. The reaction is based on the complexation of Fe(II) with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)-phenol (Br-PADAP). Ascorbic acid was used as reducing reagent for Fe(III) to Fe(II) and, in this way, to determine the total iron content in wine. The abs ...
DOI:
10.1016/j.foodchem.2018.10.115

17. Gold nanostars for cancer cell-targeted SERS-imaging and NIR light-triggered plasmonic photothermal therapy (PPTT) in the first and second biological windows

Author:
Song, Chunyuan; Li, Fang; Guo, Xiangyin; Chen, Wenqiang; Dong, Chen; Zhang, Jingjing; Zhang, Jieyu; Wang, Lianhui
Source:
Journal of materials chemistry B 2019 v.7 no.12 pp. 2001-2008
ISSN:
2050-7518
Subject:
ascorbic acid,   etc   ; absorption; gold; humans; image analysis; lungs; nanogold; nanoparticles; neoplasm cells; neoplasms; phototherapy; photothermotherapy;     Show all 12 Subjects
Abstract:
... Cancer cell-targeted imaging and efficient therapy are vital for tumor diagnosis and treatments. However, the development of multifunctional plasmonic nanoparticles with high-performance SERS-imaging and NIR light-triggered plasmonic photothermal therapy (PPTT) of cancer cells in both the first (NIR-I) and second (NIR-II) biological windows is still a big challenge. In the present work, gold nanos ...
DOI:
10.1039/c9tb00061e

18. Evaluation of the composition of Chinese bayberry wine and its effects on the color changes during storage

Author:
Zhang, Zhengwei; Li, Jieying; Fan, Liuping
Source:
Food chemistry 2019 v.276 pp. 451-457
ISSN:
0308-8146
Subject:
ascorbic acid,   etc   ; Maillard reaction; Morella rubra; anthocyanins; color; hydroxymethylfurfural; kinetics; phenols; storage temperature; storage time; wines;     Show all 11 Subjects
Abstract:
... The color changes of Chinese bayberry wines during storage is a wide and urgent problem and its mechanism is still not clear. The changes of composition and color parameters of Chinese bayberry wines were studied during 70 days of storage in the dark at three different temperatures (4, 25 and 37 °C). The L∗, a∗, b∗, anthocyanins, total phenols, and total flavonoids decreased along with the increas ...
DOI:
10.1016/j.foodchem.2018.10.054

19. One-pot green synthesis of bimetallic hollow palladium-platinum nanotubes for enhanced catalytic reduction of p-nitrophenol

Author:
Wang, Yinan; Li, Qingchuan; Zhang, Ping; O'Connor, David; Varma, Rajender S.; Yu, Miao; Hou, Deyi
Source:
Journal of colloid and interface science 2019 v.539 pp. 161-167
ISSN:
0021-9797
Subject:
ascorbic acid,   etc   ; alloys; catalytic activity; dissociation; lipids; longevity; manufacturing; nanotubes; p-nitrophenol; reducing agents;     Show all 10 Subjects
Abstract:
... Bimetallic alloy nanostructures have garnered much attention due to their unique performances in catalytic processes. However, decline in catalytic activity over the life span has been a protracted limitation, ascribed largely to the aggregation or dissociation of particles and still remains a challenge for manufacturing bimetallic nanostructures of sufficient stability. Herein, a surfactant- and ...
DOI:
10.1016/j.jcis.2018.12.053

20. A label-free colorimetric strategy for facile and low-cost sensing of ascorbic acid using MnO₂ nanosheets

Author:
Chen, Ping; Zhong, Hui; Wang, Xiang; Shao, Changdong; Zhi, Sanjun; Li, Xiao-Rong; Wei, Changmei
Source:
Analytical methods 2019 v.11 no.11 pp. 1469-1474
ISSN:
1759-9679
Subject:
ascorbic acid,   etc   ; biochemical pathways; color; colorimetry; food safety; humans; manganese; manganese dioxide; medicine; nanosheets; photometry;     Show all 11 Subjects
Abstract:
... Ascorbic acid (AA), as a key coenzyme in human metabolic pathways, plays an important role in various physiological reactions. An abnormal level of AA is found to be associated with several diseases. In this paper, we developed a label-free colorimetric method for the determination of AA by using manganese dioxide (MnO₂) nanosheets. Once AA was introduced, MnO₂ was reduced to Mn²⁺, which resulted ...
DOI:
10.1039/c9ay00091g