Simple and fast determination of catecholamines in pharmaceutical samples using Ag+–3,3′,5,5′-tetramethylbenzidine as a colorimetric probe

2015 ◽  
Vol 7 (16) ◽  
pp. 6785-6790 ◽  
Author(s):  
Shuyun Zhu ◽  
Jing Yang ◽  
Xian-en Zhao ◽  
Rongmei Kong ◽  
Hua Wang ◽  
...  
Keyword(s):  
Colorimetric Method ◽  
Fast Determination ◽  
Colorimetric Probe ◽  
Pharmaceutical Samples ◽  
First Time

For the first time, a colorimetric method for the detection of catecholamines is developed based on their reducibility towards blue oxidized 3,3′,5,5′-tetramethylbenzidine oxidized by Ag+.

scholarly journals Explore the Effects of Fertilization on Polyphenols Content in Autumn of Forages from Hill Permanent Grassland by Principal Component & Classifications Analysis

2011 ◽  
Vol 68 (1) ◽  
Author(s):  
Monica HARMANESCU
Keyword(s):  
Colorimetric Method ◽  
Principal Component ◽  
Floristic Composition ◽  
Classification Analysis ◽  
Permanent Grassland ◽  
Different Types ◽  
The Matrix ◽  
Chemometric Techniques ◽  
First Time

Principal Components and Classification Analysis (PC&CA) represents one of the most utilised multivariate chemometric techniques, having the advantage to use many measurements for a single sample in the same time, being recommended for understanding better the complexity of one phenomenon. The aim of this paper was to use PC&CA to study the effects of different types of fertilizers on polyphenols content of forages harvested in autumn from permanent grassland. Gravimetrically was established the matrix of floristic composition. The experimental field was fertilized first time in 2003, organic and/or NPK mineral. The determination of polyphenols contents was made using UV-VIS SPECORD 205 spectrophotometer, in conformity to chemical Folin and Ciocalteu colorimetric method. The highest polyphenols content was identified in forages from unfertilized variant (108 µM gallic acid/g). PC&CA can be a useful tool in describing the modification of polyphenols contents of forages under the effects of organic and/or mineral fertilisation of permanent grassland.

Colorimetric detection of hypochlorite based on the morphological changes of silver nanoprisms to spherical nanoparticles

2017 ◽  
Vol 9 (21) ◽  
pp. 3151-3158 ◽  
Author(s):  
Thangarasu Sasikumar ◽  
Malaichamy Ilanchelian
Keyword(s):  
Quantitative Determination ◽  
Morphological Changes ◽  
Colorimetric Detection ◽  
Colorimetric Method ◽  
Spherical Nanoparticles ◽  
Colorimetric Probe ◽  
Silver Nanoprisms

In this work, we have developed a simple, rapid, sensitive and selective colorimetric method for the quantitative determination of hypochlorite (ClO−) ions by using triangular silver nanoprisms (AgNPRs) as a colorimetric probe.

Simple and Fast Determination of Warfarin in Pharmaceutical Samples Using Boron-doped Diamond Electrode in BIA and FIA Systems with Multiple Pulse Amperometric Detection

2017 ◽  
Vol 29 (10) ◽  
pp. 2340-2347 ◽  
Author(s):  
Tiago de Jesus Guedes ◽  
Glauber Antônio Reis Andrade ◽  
Amanda Barbosa Lima ◽  
Rodrigo Amorim Bezerra da Silva ◽  
Wallans Torres Pio dos Santos
Keyword(s):  
Amperometric Detection ◽  
Boron Doped Diamond ◽  
Fast Determination ◽  
Pharmaceutical Samples ◽  
Multiple Pulse ◽  
Pulse Amperometric Detection ◽  
Diamond Electrode ◽  
Boron Doped ◽  
Boron Doped Diamond Electrode

Application of nickel cobalt oxide nanoflakes for electrochemical sensing of estriol in milk

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65588-65593 ◽  
Author(s):  
Hui-Jun Fu ◽  
Yu Wang ◽  
Xiu-Xiu Dong ◽  
Yi-Xin Liu ◽  
Zi-Jian Chen ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Cobalt Oxide ◽  
Electrochemical Sensing ◽  
Fast Determination ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide ◽  
First Time

In this work, a nickel cobalt oxide (Ni/Co oxide) nanoflake based electrochemical sensor for the fast determination of estriol in milk is presented for the first time.

Rapid and fast strategy for the determination of glutathione in the presence of vitamin B6in biological and pharmaceutical samples using a nanostructure based electrochemical sensor

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 56255-56261 ◽  
Author(s):  
Mehdi Shabani-Nooshabadi ◽  
Fahimeh Tahernejad-Javazmi
Keyword(s):  
Electrochemical Sensor ◽  
Simultaneous Determination ◽  
Biological Samples ◽  
Vitamin B ◽  
Pharmaceutical Samples ◽  
First Time

In this study, we describe the simultaneous determination of glutathione and vitamin B6in pharmaceutical and biological samples for the first time.

First Time Determination of Important Catalyst Sodium Methoxide Used in Biodiesel by Colorimetric Method

2018 ◽  
Vol 90 (5) ◽  
pp. 3550-3555 ◽  
Author(s):  
Sabir Khan ◽  
Matthieu Tubino ◽  
Marta M. D. C. Vila ◽  
Flavio A. Bastos
Keyword(s):  
Sodium Methoxide ◽  
Colorimetric Method ◽  
Time Determination ◽  
First Time

Solvent-dependent fluorescent-colorimetric probe for dual monitoring of Al3+ and Cu2+ in aqueous solution: an application to bio-imaging

2016 ◽  
Vol 45 (28) ◽  
pp. 11540-11553 ◽  
Author(s):  
Anupam Ghorai ◽  
Jahangir Mondal ◽  
Shubhamoy Chowdhury ◽  
Goutam K. Patra
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Colorimetric Probe ◽  
Selective Determination ◽  
Bio Imaging ◽  
First Time

A solvent-dependent reversible fluorescent-colorimetric bis-iminopyridyl Schiff base receptor (N1E,N4E)-N1,N4-bis(quinolin-4-ylmethylene)benzene-1,4-diamine (L) has been developed for the first time for sensitive and selective determination of Al3+ and Cu2+ in aqueous solution.

Simple and fast determination of biothiols using Fe3+-3, 3′, 5, 5′-tetramethylbenzidine as a colorimetric probe

2019 ◽  
Vol 147 ◽  
pp. 319-323 ◽  
Author(s):  
Mengling Lin ◽  
Yingjie Guo ◽  
Zhiyong Liang ◽  
Xuesong Zhao ◽  
Jianan Chen ◽  
...  
Keyword(s):  
Fast Determination ◽  
Colorimetric Probe

A novel colorimetric sensor for sensitive determination of R-citalopram based on the plasmonic properties of silver nanoparticles

2017 ◽  
Vol 41 (22) ◽  
pp. 13881-13888 ◽  
Author(s):  
Javad Tashkhourian ◽  
Mina Afsharinejad
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Colorimetric Method ◽  
Colorimetric Sensor ◽  
Colorimetric Probe ◽  
Sensitive Determination ◽  
Inherent Chirality ◽  
Visual Differentiation

A simple and reliable colorimetric method for visual differentiation between the S-citalopram and R-citalopram enantiomers in aqueous solution based on the inherent chirality of silver nanoparticles as a colorimetric probe was presented.

Disability as a social phenomenon

2020 ◽  
pp. 22-38
Author(s):  
Natalia Guseva ◽  
Vitaliy Berdutin
Keyword(s):  
Social Protection ◽  
Russian Society ◽  
Stage Model ◽  
High Quality ◽  
Rehabilitation Programs ◽  
Current State ◽  
The Social ◽  
Consistent Solution ◽  
First Time

At present, the problem of establishing disability is a point at issue in Russia. Despite the fact that medical criteria for disability are being developed very actively, high-quality methods for assessing social hallmarks are still lacking. Since disability is a phenomenon inherent in any society, each state forms a social and economic policy for people with disabilities in accordance with its level of development, priorities and opportunities. We have proposed a three-stage model, which includes a system for the consistent solution of the main tasks aimed at studying the causes and consequences of the problems encountered today in the social protection of citizens with health problems. The article shows why the existing approaches to the determination of disability and rehabilitation programs do not correspond to the current state of Russian society and why a decrease in the rate of persons recognized as disabled for the first time does not indicate an improvement in the health of the population. The authors proposed a number of measures with a view to correcting the situation according to the results of the study.

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