The Development and Application Offshore of a Direct Test of Well Fluid Scale Inhibition

2004 ◽  
Author(s):  
Ian R. Collins ◽  
Neil P. Chilcott ◽  
Alex Thornton
Keyword(s):  
Direct Test ◽  
Scale Inhibition

A Direct Test of the Dividend Catering Hypothesis

2017 ◽  
Author(s):  
Alok Kumar ◽  
Zicheng Lei ◽  
Chendi Zhang
Keyword(s):  
Direct Test

Persistent Bias Among Local Election Officials

2019 ◽  
Vol 7 (3) ◽  
pp. 179-187
Author(s):  
D. Alex Hughes ◽  
Micah Gell-Redman ◽  
Charles Crabtree ◽  
Natarajan Krishnaswami ◽  
Diana Rodenberger ◽  
...  
Keyword(s):  
Implicit Bias ◽  
Direct Test ◽  
Muslim Americans ◽  
Election Cycle ◽  
Local Election ◽  
Arab Muslim ◽  
2016 Election ◽  
2012 Election

AbstractResults of an audit study conducted during the 2016 election cycle demonstrate that bias toward Latinos observed during the 2012 election has persisted. In addition to replicating previous results, we show that Arab/Muslim Americans face an even greater barrier to communicating with local election officials, but we find no evidence of bias toward blacks. An innovation of our design allows us to measure whether e-mails were opened by recipients, which we argue provides a direct test of implicit discrimination. We find evidence of implicit bias toward Arab/Muslim senders only.

ZIF-8@s-EPS as a novel hydrophilic multifunctional biomaterial for efficient scale inhibition, antibacterial and antifouling in water treatment

2021 ◽  
Vol 773 ◽  
pp. 145706
Author(s):  
Rui-Xia Gao ◽  
Yan Li ◽  
Ting-Ting Zhu ◽  
Yi-Xiu Dai ◽  
Xiao-Hong Li ◽  
...  
Keyword(s):  
Water Treatment ◽  
Scale Inhibition

scholarly journals Effect of permanent magnetic field on scale inhibition property of circulating water

2017 ◽  
Vol 76 (8) ◽  
pp. 1981-1991 ◽  
Author(s):  
Lili Jiang ◽  
Xiayan Yao ◽  
Haitao Yu ◽  
Xingang Hou ◽  
Zongshu Zou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hydrogen Bonds ◽  
Flow Velocity ◽  
Magnetic Field Intensity ◽  
Water Molecules ◽  
Relative Variation ◽  
Initial Concentration ◽  
Circulating Water ◽  
Scale Inhibition ◽  
Inhibition Property

Effect of a permanent magnet field on the scale inhibition property of circulating water was investigated. Orthogonal experiments of L16(45) were performed and analyzed using the range analysis method. The operating parameters included magnetic field intensity, initial concentration of Ca2+ and Mg2+, magnetic treatment time, temperature, and flow velocity. Scale inhibition rate, hardness, relative variation in the proportion of free water molecules, electrical conductivity, and relative variation of molecular energy were chosen as the objectives. In addition, the morphology and the composition of CaCO3 and MgCO3 scale were studied by X-ray diffraction analysis. The optimal conditions were initial concentration of 900 mg/L, magnetic field intensity of 0.5 T, temperature of 303 K, time of 54 h and flow velocity of 0.17 m/s. The nuclear magnetic resonance results demonstrated that the number of hydrogen bonds increased between water molecules and hydrated ions. The magnetic field can promote the increase in the number of hydrogen bonds, which can inhibit the formation of calcium and magnesium carbonate precipitation. Moreover, the ratio of calcite, aragonite and vaterite will be changed at different magnetic field intensities, and the aragonite ratio will reach the peak at the optimum conditions.

Research Progress of Scale Inhibition Mechanism

2014 ◽  
Vol 955-959 ◽  
pp. 2411-2414 ◽  
Author(s):  
Li Xiu Liu ◽  
Ai Jiang He
Keyword(s):  
Metal Surface ◽  
Inorganic Salt ◽  
Simulation Technique ◽  
Research Progress ◽  
Inhibition Mechanism ◽  
Scale Inhibitor ◽  
Scale Inhibition

Scale inhibitor is a medicament which has the properties of dispersing insoluble inorganic salt in water, and preventing or obstructing sediment and scaling of insoluble inorganic salt on metal surface. Research on the mechanism of scale inhibition can promote using and developing scale inhibitors. In this paper, the traditional macroscopic mechanism of scale inhibition was firstly analyzed, and it was also emphasized to introduce the research progress of quantization simulation technique on the mechanism of scale inhibition, and it was also suggested to combine the microstructure of scale crystal with quantization simulation technique to have a further study on the mechanism of scale inhibition.

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