scholarly journals New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4459
Author(s):  
Amal M. Al-Mohaimeed ◽  
Gamal A. E. Mostafa ◽  
Maha F. El-Tohamy
Keyword(s):  
High Selectivity ◽  
Regression Equation ◽  
Polymeric Nanocomposites ◽  
Electrically Conductive ◽  
Electroactive Material ◽  
Naltrexone Hydrochloride ◽  
Coated Wire ◽  
New Construction ◽  
Modified Sensor ◽  
Recommended Guidelines

Electrically conductive polymeric nanocomposites with nanoparticles are adaptable types of nanomaterials that are prospective for various applications. The extraordinary features of copper oxide (CuO) and aluminium oxide (Al2O3) nanostructures, encourages extensive studies to prospect these metal oxide nanocomposites as potential electroactive materials in sensing and biosensing applications. This study suggested a new CuO/Al2O3 nanocomposite-based polymeric coated wire membrane sensor for estimating naltrexone hydrochloride (NTX) in commercial formulations. Naltrexone hydrochloride and sodium tetraphenylborate (Na-TPB) were incorporated in the presence of polymeric polyvinyl chloride (PVC) and solvent mediator o-nitrophenyloctyl ether (o-NPOE) to form naltrexone tetraphenylborate (NTX-TPB) as an electroactive material. The modified sensor using NTX-TPB-CuO/Al2O3 nanocomposite displayed high selectivity and sensitivity for the discrimination and quantification of NTX with a linearity range 1.0 × 10−9–1.0 × 10−2 mol L−1 and a regression equation EmV = (58.25 ± 0.3) log [NTX] + 754.25. Contrarily, the unmodified coated wire sensor of NTX-TPB exhibited a Nernstian response at 1.0 × 10−5–1.0 × 10−2 mol L−1 and a regression equation EmV = (52.1 ± 0.2) log [NTX] + 406.6. The suggested modified potentiometric system was validated with respect to various criteria using the methodology recommended guidelines.

scholarly journals New Functionalized Polymeric Sensor Based NiO/MgO Nanocomposite for Potentiometric Determination of Doxorubicin Hydrochloride in Commercial Injections and Human Plasma

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3066
Author(s):  
Nawal A. Alarfaj ◽  
Maha F. El-Tohamy
Keyword(s):  
Human Plasma ◽  
Phosphomolybdic Acid ◽  
Doxorubicin Hydrochloride ◽  
Mgo Nanoparticles ◽  
Electroactive Material ◽  
Coated Wire ◽  
New Strategy ◽  
Modified Sensor ◽  
Conventional Type

The ultra-functional potential of nickel oxide (NiO) and magnesium oxide (MgO) nanoparticles (NPs), provides for extensive attention in the use of these metal oxides as a remarkable and electroactive nanocomposite in potentiometric and sensing investigations. This work proposed a new strategy for quantifying doxorubicin hydrochloride (DOX) in pharmaceuticals and human plasma by preparing a NiO/MgO core-shell nanocomposite modified coated wire membrane sensor. Doxorubicin hydrochloride was incorporated with phosphomolybdic acid (PMA) to produce doxorubicin hydrochloride phosphomolybdate (DOX-PM) as an electroactive material in the presence of polymeric high molecular weight poly vinyl chloride (PVC) and solvent mediator o-nitrophenyloctyl ether (o-NPOE). The modified sensor exhibited ultra sensitivity and high selectivity for the detection and quantification of doxorubicin hydrochloride with a linear relationship in the range of 1.0 × 10−11–1.0 × 10−2 mol L−1. The equation of regression was estimated to be EmV = (57.86 ± 0.8) log [DOX] + 723.19. However, the conventional type DOX-PM showed a potential response over a concentration range of 1.0 × 10−6–1.0 × 10−2 mol L−1 and a regression equation of EmV = (52.92 ± 0.5) log [DOX] + 453.42. The suggested sensors were successfully used in the determination of doxorubicin hydrochloride in commercial injections and human plasma.

scholarly journals Determination of Nd3+Ions in Solution Samples by a Coated Wire Ion-Selective Sensor

2012 ◽  
Vol 9 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Hassan Ali Zamani
Keyword(s):  
High Selectivity ◽  
Water Solution ◽  
Fast Response ◽  
Indicator Electrode ◽  
Coated Wire ◽  
Nernstian Slope ◽  
Ph Range ◽  
Coated Wire Electrode ◽  
Selective Sensor

A new coated wire electrode (CWE) using 5-(methylsulfanyl)-3-phenyl-1H-1,2,4-triazole (MPT) as an ionophore has been developed as a neodymium ion-selective sensor. The sensor exhibits Nernstian response for the Nd3+ions in the concentration range of 1.0×10−6-1.0×10−2M with detection limit of 3.7×10−7M. It displays a Nernstian slope of 20.2±0.2 mV/decade in the pH range of 2.7–8.1. The proposed sensor also exhibits a fast response time of ∼5 s. The sensor revealed high selectivity with respect to all common alkali, alkaline earth, transition and heavy metal ions, including members of the lanthanide family other than Nd3+. The electrode was used as an indicator electrode in the potentiometric titration of Nd(III) ions with EDTA. The electrode was also employed for the determination of the Nd3+ions concentration in water solution samples.

A highly efficient Baby Spinach-based minimal modified sensor (BSMS) for nucleic acid analysis

2019 ◽  
Vol 17 (30) ◽  
pp. 7222-7227 ◽  
Author(s):  
Rashi Soni ◽  
Deepti Sharma ◽  
A. Murali Krishna ◽  
Jagadeesh Sathiri ◽  
Ashwani Sharma
Keyword(s):  
Nucleic Acid ◽  
Nucleic Acids ◽  
High Selectivity ◽  
Fluorescence Enhancement ◽  
Highly Efficient ◽  
Nucleic Acid Analysis ◽  
Modified Sensor

A Baby Spinach aptamer based minimal-modified sensor (BSMS) detects nucleic acids of potentially any length with high selectivity and specificity, and shows 2.5-fold more fluorescence enhancement compared to the parent aptamer.

A copper ion-selective electrode with high selectivity prepared by sol-gel and coated wire techniques

2004 ◽  
Vol 378 (6) ◽  
pp. 1659-1665 ◽  
Author(s):  
M. Mazloum Ardakani ◽  
M. Salavati-Niasari ◽  
M. Khayat Kashani ◽  
S. M. Ghoreishi
Keyword(s):  
High Selectivity ◽  
Sol Gel ◽  
Copper Ion ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Coated Wire

scholarly journals Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1272 ◽  
Author(s):  
Aisha Tanvir ◽  
Patrik Sobolčiak ◽  
Anton Popelka ◽  
Miroslav Mrlik ◽  
Zdenko Spitalsky ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Flexible Electronics ◽  
Uv Spectroscopy ◽  
Composite Films ◽  
Mechanical Analysis ◽  
Nanocomposite Films ◽  
Max Phase ◽  
Polymeric Nanocomposites ◽  
Electrically Conductive

The electrically conductive, transparent, and flexible self-standing thin nanocomposite films based on copolyamide matrix (coPA:Vestamelt X1010) modified with 2D Ti3C2Tx (MXene) nanosheets were prepared by casting and their electrical, mechanical and optical properties and then, were investigated. The percolation threshold of the MXene filler within the coPA matrix was found to be 0.05 vol. %, and the highest determined electrical conductivity was 1.4 × 10−2 S·cm−1 for the composite filled with 5 wt. % (1.8 vol. %) of MXene. The electrical conductivity of the as-prepared MXene was 9.1 S·cm–1, and the electrical conductivity of the MAX phase (the precursor for MXene preparation) was 172 S·cm–1. The transparency of the prepared composite films exceeded 75%, even for samples containing 5 wt. % of MXene, as confirmed by UV spectroscopy. The dynamic mechanical analysis confirmed the improved mechanical properties, such as the storage modulus, which improved with the increasing MXene content. Moreover, all the composite films were very flexible and did not break under repeated twisting. The combination of the relatively high electrical conductivity of the composites filled with low filler content, an appropriate transparency, and good mechanical properties make these materials promising for applications in flexible electronics.

scholarly journals INCREASING THE EFFICIENCY OF THE MATERIAL CLASSIFICATION PROCESS IN CLASSIFYING BALL MILLS PARTITION

2020 ◽  
Vol 5 (9) ◽  
pp. 97-107
Author(s):  
S. Khanin ◽  
R. Zybin ◽  
O. Mordovskaya
Keyword(s):  
Mathematical Modeling ◽  
Ball Mill ◽  
High Performance ◽  
Regression Equation ◽  
Ball Mills ◽  
Material Classification ◽  
Coarse Material ◽  
New Construction ◽  
Ground Material

Ball mills are widely used for dispersion of materials in various industries, as they are characterized by ease of maintenance, operation and sufficiently high performance. To improve the process of inner-chamber classification of coarse-ground material, a new construction of the classifying partition with blades having cylindrical screening surfaces is proposed. The aim of the research is to substantiate the effectiveness of the application of the developed construction of the classifying partition in an industrial ball mill. The tasks of the research are to study the effectiveness of the developed construction of the classifying partitions on industrial ball mill. The tasks are solved of constructing and analyzing a regression equation that adequately describes the efficiency of the process of classifying coarse material with a cylindrical sieving surface depending on variable factors, determining rational areas of their values; comparing the efficiency of using blades with cylindrical and flat screening surfaces for inner-chamber classification of coarse material; confirmation of the possibility of providing the developed classifying partition with the mass productivity necessary for the operation of the mill. In the course of the work, the methods of simulation and mathematical modeling were used. As a result of the study, the efficiency of using a classifying partition with blades with cylindrical screening surfaces of a ball mill D×L=2×10,5 is substantiated.

Architecture for Wellness: A Post-Occupancy Evaluation of a University Student Recreation Center

2002 ◽  
Vol 26 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Rebecca Weis Davis ◽  
Mardelle McCuskey Shepley
Keyword(s):  
Primary Objective ◽  
Design Guidelines ◽  
Recreational Sports ◽  
Materials Selection ◽  
Recreational Facilities ◽  
Post Occupancy Evaluation ◽  
New Construction ◽  
Recommended Guidelines ◽  
New Student ◽  
New Facilities

The building analyzed in this study is a new student recreation center at a major university. The primary objective of the study was to create design guidelines for recreational facilities that would be useful to sports personnel and architects. Secondly, because the facility is being used as a model for other new facilities, the researchers believe that its successes and shortcomings should be identified. A third objective of this research is to provide a research format that recreational sports personnel can use to evaluate new facilities, or evaluate old facilities in order to justify new construction. The research methods implemented in this study were interviews, observation, behavioral mapping, and questionnaires. Issue-oriented questions were analyzed to address design features such as building organization and finishes. Behavior mapping studies were analyzed to study the ability to supervise the facility. In general, the facility was well received. Design shortcomings, however, included lack of signage, and problems with temperature control, and inappropriate materials selection. Recommended guidelines for recreational facilities are provided.

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