Enhancing high-potential stability of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode with PrF3 coating

2020 ◽  
Author(s):  
Jiawei Li ◽  
Jingjing Wang ◽  
Xianghao Lu ◽  
Hongyu Jiang ◽  
Quanhai Zhang ◽  
...  
Keyword(s):  
High Potential ◽  
High Potential Stability ◽  
Potential Stability

scholarly journals Ion-to-electron capacitance of single-walled carbon nanotube layers before and after ion-selective membrane deposition

2021 ◽  
Vol 188 (5) ◽  
Author(s):  
Elena Zdrachek ◽  
Eric Bakker
Keyword(s):  
Carbon Nanotube ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Essential Step ◽  
Before And After ◽  
Selective Membrane ◽  
High Potential Stability ◽  
Potential Stability

AbstractThe capacitance of the ion-to-electron transducer layer helps to maintain a high potential stability of solid-contact ion-selective electrodes (SC-ISEs), and its estimation is therefore an essential step of SC-ISE characterization. The established chronopotentiometric protocol used to evaluate the capacitance of the single-walled carbon nanotube transducer layer was revised in order to obtain more reliable and better reproducible values and also to allow capacitance to be measured before membrane deposition for electrode manufacturing quality control purposes. The capacitance values measured with the revised method increased linearly with the number of deposited carbon nanotube–based transducer layers and were also found to correlate linearly before and after ion-selective membrane deposition, with correlation slopes close to 1 for nitrate-selective electrodes, to 0.7 and to 0.5 for potassium- and calcium-selective electrodes. Graphical abstract

scholarly journals Screen-Printed Sensor Based on Potentiometric Transduction for Free Bilirubin Detection as a Biomarker for Hyperbilirubinemia Diagnosis

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 86 ◽  
Author(s):  
Ayman H. Kamel ◽  
Abd El-Galil E. Amr ◽  
Hoda R. Galal ◽  
Mohamed A. Al-Omar ◽  
Abdulrahman A. Almehizia
Keyword(s):  
Electrochemical Impedance ◽  
Biological Fluids ◽  
Ion Association ◽  
High Specificity ◽  
Cost Effective ◽  
Pvc Membrane ◽  
Phosphate Solution ◽  
High Potential Stability ◽  
Potential Stability ◽  
Screen Printed

Novel reliable and cost-effective potentiometric screen-printed sensors for free bilirubin (BR) detection were presented. The sensors were fabricated using ordered mesoporous carbon (OMC) as an ion-to-electron transducer. The ion-association complex [Ni(bphen)3]2+[BR]2− was utilized as a sensory recognition material in the plasticized Polyvinyl Chloride (PVC) membrane. The membrane was drop-casted on the OMC layer, which is attached on a carbon conductor (2-mm diameter). In a 50 mM phosphate solution of pH 8.5, the electrodes offered a Nernstian slope of −26.8 ± 1.1 (r2 = 0.9997) mV/decade with a range of linearity 1.0 × 10−6–1 × 10−2 M towards free bilirubin with a detection limit 8.8 × 10−7 M (0.52 µg/mL). The presented sensors offered good features in terms of reliability, ease of design, high potential stability, high specificity and good accuracy and precision. Chronopotentiometric and electrochemical impedance spectrometric measurements were used for short-term potential stability and interfacial capacitance calculations. The sensors were used for the determination of free bilirubin in biological fluids. The data obtained are fairly well consistent with those obtained by the reference spectophotometric method. Based on the interaction of free BR with albumin (1:1), the sensors were also utilized for the assessment of albumin in human serum.

scholarly journals Novel Validated Analytical Method Based on Potentiometric Transduction for the Determination of Citicoline Psychostimulant/Nootropic Agent

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3512
Author(s):  
Ayman H. Kamel ◽  
Abd El-Galil E. Amr ◽  
Hoda R. Galal ◽  
Abdulrahman A. Almehizia
Keyword(s):  
High Performance ◽  
Ion Association ◽  
Pharmaceutical Formulations ◽  
Hplc Method ◽  
Polymeric Membranes ◽  
Nootropic Agent ◽  
High Potential Stability ◽  
First Time ◽  
Potential Stability

Herein, a novel validated potentiometric method is presented for the first time for citicoline determination. The method is based on measuring the potential using new constructed citicoline electrodes. The electrodes are based on the use of citicolinium/phosphomolybdate [Cit]2[PM] (sensor I) and citicolinium/tetraphenylborate [Cit][TPB] (sensor II) ion association complexes. These sensory materials were dispersed in plasticized polyvinyl chloride (PVC) polymeric membranes. The sensors revealed a Nernstian response with the slopes 55.9 ± 1.8(r2 = 0.9994) and 51.8 ± 0.9 (r2 = 0.9991) mV/decade over a linearity range of 6.3 × 10−6–1.0 × 10−3 and 1.0 × 10−5–1.0 × 10−3 M and detection limits of 3.16 × 10−6 and 7.1 × 10−6 M for sensors I and II, respectively. To ensure the existence of monovalent citicoline, all measurements were performed in 50 mM acetate buffer at pH 3.5. All presented electrodes showed good performance characteristics such as rapid response, good selectivity, high potential-stability and long life-span. Method verification and validation in terms of response linearity, quantification limit, accuracy, bias, trueness, robustness, within-day variability and between-days variability were evaluated. The method was introduced for citicoline determination in different pharmaceutical formulations and compared with the standard high performance liquid chromatography (HPLC) method.

Best practices to develop high-potential talent

2009 ◽  
Author(s):  
Steve Krupp ◽  
Orla M. NicDomhnaill ◽  
Allan H. Church ◽  
Steven J. Robison ◽  
Michael N. Bazigos
Keyword(s):  
Best Practices ◽  
High Potential

Current issues in identifying and growing high-potential talent

2009 ◽  
Author(s):  
Michel A. Buffet ◽  
Robin R. Cohen ◽  
Michael Crespo ◽  
Stephen A. Dwight ◽  
Lorry A. Olson
Keyword(s):  
High Potential

Effect of Bentonite on Fibrinolytic System in Serum

1963 ◽  
Vol 10 (01) ◽  
pp. 120-132 ◽  
Author(s):  
E. S Olesen
Keyword(s):  
Guinea Pig ◽  
Plasminogen Activator ◽  
Fibrinolytic Activity ◽  
High Potential ◽  
Fibrinolytic System ◽  
Fibrinolytic Agents ◽  
Isoelectric Precipitation ◽  
Active Protease ◽  
Pig Serum

SummaryTreatment of serum with bentonite led to a reduced content of inhibitors of trypsin and urokinase in the isoelectrically precipitated euglobulin, and removed fibrinolytic agents and precursors from serum. Bentonite-treated serum added to untreated serum reduced precipitation of the above inhibitors, and presumably also precipitation of inhibitors against a plasminogen activator of serum.Bentonite-treated serum (whether from pig, ox, guinea-pig, or man), added to untreated guinea-pig serum, produced fibrinolytic activity on isoelectric precipitation of the mixture; the activity of the euglobulin was due to an activator of plasminogen as well as an active protease, probably plasmin. The described effects of bentonite-treated serum are similar to those previously reported for anionic polyelectrolytes. Possible mechanisms are discussed.The “non-specific” activation of fibrinolytic activity by means of bentonite emphasizes that guinea-pig serum [which is characterized by a high potential for “nonspecific” activation of its fibrinolytic system Olesen (1962)] contains all the elements required for the formation of an activator of plasminogen, and thus the activation of its plasminogen to plasmin.

Sign in / Sign up

Export Citation Format

Share Document