Green ammonia synthesis using CeO2/RuO2 nanolayers on vertical graphene catalyst via electrochemical route in alkaline electrolyte

Nanoscale ◽  
2022 ◽  
Author(s):  
Hyungkuk Ju ◽  
Dong Han Seo ◽  
Sunki Chung ◽  
Xin Mao ◽  
Byeong Seon An ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Production Process ◽  
Electrochemical Synthesis ◽  
Ammonia Synthesis ◽  
Alkaline Electrolyte ◽  
Ammonia Production ◽  
Long Term Stability ◽  
Electrochemical Synthesis Of Ammonia ◽  
Temperature And Pressure

The electrochemical synthesis of ammonia at ambient temperature and pressure has a potential to replace conventional ammonia production process. However, low ammonia yield and poor long-term stability of the catalyst...

The Long-Term Stability in Whole Blood of 14 Commonly-Requested Hormone Analytes

1994 ◽  
Vol 31 (6) ◽  
pp. 561-565 ◽  
Author(s):  
M J Diver ◽  
J G Hughes ◽  
J L Hutton ◽  
C R West ◽  
L J Hipkin
Keyword(s):  
Ambient Temperature ◽  
Whole Blood ◽  
Great Majority ◽  
Red Cells ◽  
Clinical Interpretation ◽  
Term Stability ◽  
Long Term Stability ◽  
Plasma Hormones

Concentrations of 14 commonly-requested plasma hormones were measured in octuplicate in each of six subjects to determine their stability when unseparated from red cells for periods up to 1 week. Most of the analytes were stable when stored in this way and although statistically significant changes were recorded, in the great majority of cases the changes seen would have no bearing on the clinical interpretation of the result. In the light of these findings, we would confidently report results of analyses for these hormones in plasma that had remained in contact with red cells at ambient temperature for long periods of time.

scholarly journals Materials for electrochemical ammonia synthesis

2019 ◽  
Vol 48 (5) ◽  
pp. 1562-1568 ◽  
Author(s):  
Ian James McPherson ◽  
Tim Sudmeier ◽  
Joshua Fellowes ◽  
Shik Chi Edman Tsang
Keyword(s):  
Energy Storage ◽  
Carbon Footprint ◽  
Electrochemical Synthesis ◽  
Ammonia Synthesis ◽  
Electrochemical Synthesis Of Ammonia

Direct electrochemical synthesis of ammonia is proposed as a means of reducing the carbon footprint of the fertiliser industry, as well as providing new opportunities for carbon-free liquid energy storage.

A Versatile Temperature-Controlled Reaction Cuvet

1975 ◽  
Vol 21 (8) ◽  
pp. 1175-1178
Author(s):  
Michael G Busby ◽  
David B Cottrell ◽  
George S Cembrowski ◽  
E Clifford Toren
Keyword(s):  
Ambient Temperature ◽  
Temperature Control ◽  
Recovery Time ◽  
Visible Region ◽  
Term Stability ◽  
Long Term Stability ◽  
Temperature Recovery ◽  
Temperature Controlled

Abstract A thermostatted reaction cuvet, operating under computerized or manual temperature control in the ultraviolet or visible region, is described and evaluated. The cell was designed for use with the automated chemistry system described earlier [Clin. Chem. 19, 1114 (1973)], but can readily be adapted for other applications. The entire 3-ml cuvet assembly warms from ambient temperature to 37 °C in less than 10 min, with ±0.15 °C stability; the long-term stability is ±0.05 °C; temperature recovery time after washing or reagent addition is less than 3 min. The optical pathlength is 10.00 mm and the carryover volume is 18 µl.

A Discussion on the measurement and interpretation of changes of strain in the Earth - Strain measurement in Australia with particular reference to the Cooney Observatory

1973 ◽  
Vol 274 (1239) ◽  
pp. 323-330 ◽  
Keyword(s):  
New England ◽  
Research Programme ◽  
Instrument Error ◽  
Crustal Movements ◽  
Long Term Stability ◽  
The Earth ◽  
Temperature And Pressure ◽  
Strain Determination ◽  
The University

A number of groups in Australia are concerned with Earth crustal movement measurement and interpretation. A brief description is given of their activities. Monitoring crustal movements requires methods of strain determination which have the best attainable precision and long-term stability. Paramount to improvement of the established techniques is need for a facility where the various methods can be compared in a reliable manner. The remainder of the paper describes the research programme of the Cooney Observatory (operated by the University of New England) which has a dominant theme of instrument development and verification. Rod, wire and laser strain-meters and the necessary peripheral equipment are described. Of interest is the continuing improvement of stable intermediate-length measuring bases in which a controlled temperature and pressure environment is created to eliminate the main systematic sources of instrument error during testing and calibration.

Long-term stability of water samples— reanalysis of 20-year-old unpreserved samples

2019 ◽  
Vol 193 (2) ◽  
pp. 167-171
Author(s):  
Espen Enge
Keyword(s):  
Ambient Temperature ◽  
Water Samples ◽  
Water Bodies ◽  
Total Hardness ◽  
Term Stability ◽  
Long Term Stability ◽  
Long Term Storage ◽  
Stability Of Water ◽  
Term Storage

The current study compiles data from the reanalysis of 25 water samples stored unpreserved at ambient temperature for 20 years. Small changes in pH, conductivity and chloride and no significant effects on Al and total hardness were detected. The small effects measured, even during long-term storage under unsuitable conditions, suggest that samples taken from pristine water bodies remain chemically stable over many years.

scholarly journals Facile manufacture of porous organic framework membranes for precombustion CO2 capture

2018 ◽  
Vol 4 (9) ◽  
pp. eaau1698 ◽  
Author(s):  
Meixia Shan ◽  
Xinlei Liu ◽  
Xuerui Wang ◽  
Irina Yarulina ◽  
Beatriz Seoane ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Energy Intensity ◽  
Ammonia Synthesis ◽  
Interfacial Polymerization ◽  
Industrial Processes ◽  
Separation Performance ◽  
Long Term Stability ◽  
Pressure Resistance ◽  
Porous Organic Framework

The development of new membranes with high H2 separation performance under industrially relevant conditions (high temperatures and pressures) is of primary importance. For instance, these membranes may facilitate the implementation of energy-efficient precombustion CO2 capture or reduce energy intensity in other industrial processes such as ammonia synthesis. We report a facile synthetic protocol based on interfacial polymerization for the fabrication of supported benzimidazole-linked polymer membranes that display an unprecedented H2/CO2 selectivity (up to 40) at 423 K together with high-pressure resistance and long-term stability (>800 hours in the presence of water vapor).

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