A highly sensitive non-enzymatic hydrogen peroxide and hydrazine electrochemical sensor based on 3D micro-snowflake architectures of α-Fe2O3

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 59907-59918 ◽  
Author(s):  
S. Majumder ◽  
B. Saha ◽  
S. Dey ◽  
R. Mondal ◽  
S. Kumar ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Sensor ◽  
Large Scale ◽  
Hydrothermal Reaction ◽  
Highly Sensitive ◽  
Hydrolysis Of

In the present work, well crystalline 3D micro-snowflake structured α-Fe2O3 has been successfully synthesized on a large scale via a simple hydrothermal reaction by hydrolysis of a K3Fe(CN)6 precursor.

Electrochemical sensor based on the Mn3O4/CeO2 nanocomposite with abundant oxygen vacancies for highly sensitive detection of hydrogen peroxide released from living cells

2021 ◽  
Vol 13 (14) ◽  
pp. 1672-1680
Author(s):  
Yalin Wu ◽  
Liping Lu ◽  
Zhihui Yu ◽  
Xiayan Wang
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Sensor ◽  
Oxygen Vacancies ◽  
Living Cells ◽  
Sensitive Detection ◽  
Reliable Determination ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

A novel electrochemical sensor based on the Mn3O4/CeO2 for reliable determination of extracellular H2O2 released from living cells was developed.

Reactions in Activated Peroxide Systems and their Influences on Bleaching Performance

2020 ◽  
Vol 17 ◽  
Author(s):  
Xiaoyan Wang ◽  
Jinmei Du ◽  
Changhai Xu
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Energy Efficiency ◽  
Textile Industry ◽  
High Energy ◽  
Side Reactions ◽  
Competitive Reactions ◽  
High Energy Efficiency ◽  
Hydrolysis Of ◽  
Bleach Activators

Abstract:: Activated peroxide systems are formed by adding so-called bleach activators to aqueous solution of hydrogen peroxide, developed in the seventies of the last century for use in domestic laundry for their high energy efficiency and introduced at the beginning of the 21st century to the textile industry as an approach toward overcoming the extensive energy consumption in bleaching. In activated peroxide systems, bleach activators undergo perhydrolysis to generate more kinetically active peracids that enable bleaching under milder conditions while hydrolysis of bleach activators and decomposition of peracids may occur as side reactions to weaken the bleaching efficiency. This mini-review aims to summarize these competitive reactions in activated peroxide systems and their influence on bleaching performance.

Enzymatic colorimetry of lecithin and sphingomyelin in aqueous solution.

1983 ◽  
Vol 29 (8) ◽  
pp. 1513-1517 ◽  
Author(s):  
M W McGowan ◽  
J D Artiss ◽  
B Zak
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Amniotic Fluid ◽  
Enzymatic Reaction ◽  
Detergent Solution ◽  
Enzymatic Determination ◽  
Red Color ◽  
Hydrolysis Of ◽  
Zwitterionic Detergent

Abstract A procedure for the enzymatic determination of lecithin and sphingomyelin in aqueous solution is described. The phospholipids are first dissolved in chloroform:methanol (2:1 by vol), the solvent is evaporated, and the residue is redissolved in an aqueous zwitterionic detergent solution. The enzymatic reaction sequences of both assays involve hydrolysis of the phospholipids to produce choline, which is then oxidized to betaine, thus generating hydrogen peroxide. The hydrogen peroxide is subsequently utilized in the enzymatic coupling of 4-aminoantipyrine and sodium 2-hydroxy-3,5-dichlorobenzenesulfonate, an intensely red color being formed. The presence of a non-reacting phospholipid enhances the hydrolysis of the reacting phospholipid. Thus we added lecithin to the sphingomyelin standards and sphingomyelin to the lecithin standards. This precise procedure may be applicable to determination of lecithin and sphingomyelin in amniotic fluid.

scholarly journals The utility of self-rated health in population surveys: the role of bodyweight

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Robert Bozick
Keyword(s):  
Treatment Group ◽  
Large Scale ◽  
Well Being ◽  
Control Group ◽  
Self Rated Health ◽  
Risk Of Mortality ◽  
Highly Sensitive ◽  
The Usa ◽  
Group Members ◽  
Nationally Representative

Abstract Background Self-rated health (SRH) is one of the most commonly used summary measures of overall health and well-being available to population scientists due to its ease of administration in large-scale surveys and to its efficacy in predicting mortality. This paper assesses the extent to which SRH is affected by its placement before or after questions about bodyweight on a survey, and whether differences in placement on the questionnaire affects SRH’s predictive validity. Methods I assessed the validity of SRH in predicting the risk of mortality by comparing outcomes of sample members who were asked to rate their health before reporting on their bodyweight (the control group) and sample members who were asked to rate their health after reporting on their bodyweight (the treatment group). Both the control and treatment group were randomly assigned via an experiment administered as a module in a nationally representative sample of adults in the USA in 2019 (N = 2523). Results The odds of reporting a more favorable appraisal of health are 30% lower for sample members who were in the treatment group when compared with the control group. Additionally, the SRH of treatment group members is significantly associated with their risk of mortality, while the SRH of control group members is not. Conclusion The findings from this study suggest that for researchers to maximize the utility of SRH, closer attention needs to be paid to the context of the survey within which it asked. SRH is highly sensitive to the questions that precede it, and this sensitivity may in turn mischaracterize the true health of the population that the survey is intending to measure.

Highly sensitive electrochemical sensor for tyrosine detection using a sub-millimeter electrode

2021 ◽  
pp. 106106
Author(s):  
Peihong Deng ◽  
Jingyun Xiao ◽  
Jinxia Feng ◽  
Yaling Tian ◽  
Yiyong Wu ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Highly Sensitive

Synthesis of a Eu complex based on benzonitrile hydrolysis as the first luminescent probe for clinafloxacin

CrystEngComm ◽  
2021 ◽  
Author(s):  
Zhong-Yu Ruan ◽  
Yong-Fang Lu ◽  
Xi Lv ◽  
Jian-Zhong Wu ◽  
Yong-Cong Ou ◽  
...  
Keyword(s):  
Hydrothermal Reaction ◽  
Europium Complex ◽  
Luminescent Probe ◽  
Hydrolysis Of

Hydrolysis of benzonitrile to benzoate was realized for constructing a zero-dimensional dinuclear europium complex [Eu2(pip)2(PhCOO)6] via hydrothermal reaction, where pip denotes 2-phenylimidazo[4,5-f][1,10]phenanthroline. This complex is very insoluble and stable in...

Highly sensitive real-time detection of intracellular oxidative stress and application in mycotoxin toxicity evaluation based on living single-cell electrochemical sensors

The Analyst ◽  
2021 ◽  
Author(s):  
Lu Gao ◽  
Jiadi Sun ◽  
Liping Wang ◽  
Qigao Fan ◽  
Gaowen Zhu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Electrochemical Sensor ◽  
Single Cell ◽  
Real Time ◽  
Electrochemical Sensors ◽  
Living Cells ◽  
Selective Detection ◽  
Toxicity Evaluation ◽  
Highly Sensitive ◽  
Intracellular Oxidative Stress

Single-cell electrochemical sensor is used in the local selective detection of living cells because of its high spatial–temporal resolution and sensitivity, as well as its ability to obtain comprehensive cellular physiological states and processes.

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