scholarly journals Inhibitory effect of new azole derivative in the corrosion of aluminum in acidic medium: common electrochemical and electrochemical noise investigation

2016 ◽  
Vol 54 (04) ◽  
pp. 233-239 ◽  
Author(s):  
A. EHSANI ◽  
H. MOHAMMAD SHIRI ◽  
M. G. MAHJANI ◽  
R. MOSHREFI ◽  
R. SAFARI,
Keyword(s):  
Acidic Medium ◽  
Electrochemical Noise ◽  
Inhibitory Effect ◽  
Azole Derivative

scholarly journals Inhibitory effect of new azole derivative in the corrosion of aluminum in acidic medium: common electrochemical and electrochemical noise investigation

2021 ◽  
Vol 54 (04) ◽  
pp. 233-239
Author(s):  
A. EHSANI ◽  
H. MOHAMMAD SHIRI ◽  
M. G. MAHJANI ◽  
R. MOSHREFI ◽  
R. SAFARI,
Keyword(s):  
Acidic Medium ◽  
Electrochemical Noise ◽  
Inhibitory Effect ◽  
Azole Derivative

scholarly journals The Influence of Polyanions and Polycations on Bacteriophage Activity

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 914
Author(s):  
Egor V. Musin ◽  
Aleksandr L. Kim ◽  
Alexey V. Dubrovskii ◽  
Ekaterina B. Kudryashova ◽  
Elena V. Ariskina ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Acidic Medium ◽  
Dextran Sulfate ◽  
Phage Therapy ◽  
Inhibitory Effect ◽  
High Ionic Strength ◽  
Polystyrene Sulfonate ◽  
Inhibition Effect ◽  
Polyelectrolyte Microcapsules ◽  
Antibiotic Drugs

Phage therapy is a great alternative to antibiotic drugs, but it can’t effectively overcome the over-acidic medium of the stomach. We offer the use of polyelectrolyte microcapsules as a protective means of bacteriophage. It is necessary to understand the influence of polyelectrolytes on bacteriophage survival. The work studied the effect of polyanions and polycations on the coliprotetic bacteriophage’s viability. We have shown that polyallylamine decreased bacteriophage’s viability during increasing polyelectrolyte concentration and polyarginine had a lower inhibitory effect (then PAH) on the activity of the bacteriophage due to polyelectrolyte concentration from 0.05 to 5 mg/mL. It was shown that the inhibition of the bacteriophage by polyallylamine had an electrostatic nature and the use of high ionic strength prevented the formation of the PAH-protein capsid complex. Polystyrene sulfonate does not affect bacteriophage viability during increasing polyelectrolyte concentration from 0.05 mg/mL to 1 mg/mL. Polystyrene sulfonate decreases the viability of bacteriophage from 5 mg/mL of polyelectrolyte concentration. Dextran sulfate inhibits bacteriophage activity at 20–30%. Dextran inhibits bacteriophage activity by 80% at diapason concentration from 0.05 to 5 mg/mL and loses the inhibition effect from a concentration of 5 mg/mL.

A Simple and Low - Cost Spectrophotometric Method for the Determination Of Hydrazine With Methyl Red-iodate System

2021 ◽  
Vol 30 (1) ◽  
pp. 01-06
Author(s):  
Madhurani Shukla ◽  
Kishore K. Tiwari
Keyword(s):  
Spectrophotometric Method ◽  
Trace Amount ◽  
Acidic Medium ◽  
Low Cost ◽  
Inhibitory Effect ◽  
Molar Absorptivity ◽  
Methyl Red ◽  
Potassium Iodate ◽  
Red Dye

A simple, sensitive and inexpensive spectrophotometric method was developed for the determination of trace amount of hydrazine at microgram level. Hydrazine has been determined by its oxidation to nitrogen by using known excess of potassium iodate. In acidic medium potassium iodate bleaches the methyl red dye. A known excess of potassium iodate was reduced when treated with hydrazine and the unreacted potassium iodate is determined by using methyl red. The method was based on inhibitory effect of hydrazine on the reaction of methyl red dye and potassium iodate in presence of acidic medium. The absorbance of the methyl red after the reaction was monitored spectrophotometrically at 520 nm. The molar absorptivity is calculated to be 3.238×105 L mol-1cm-1. Beer’s law was obeyed over the concentration range of 1-10 µg of hydrazine in an overall aqueous volume of 25 ml with a correlation coeffcient of - 0.999. Sandell’s sensitivity was found to be 0.0004µg cm-2. The optimum reaction conditions like time, temperature, pH, reagent concentration, effect of foreign species etc. have been evaluated for the complete reaction. The developed method can be successfully applied for the determination of trace amount of hydrazine in environmental samples.

scholarly journals Bis-Schiff bases of 2,2′-dibromobenzidine as efficient corrosion inhibitors for mild steel in acidic medium

RSC Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 4499-4511 ◽  
Author(s):  
Ifzan Arshad ◽  
Aamer Saeed ◽  
Pervaiz Ali Channar ◽  
Syeda Aaliya Shehzadi ◽  
Muhammad Naeem Ahmed ◽  
...  
Keyword(s):  
Mild Steel ◽  
Schiff Bases ◽  
Acidic Medium ◽  
Electrochemical Method ◽  
Corrosion Inhibitors ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
Mild Steel Corrosion ◽  
Weight Loss Method ◽  
Loss Method

The inhibitory effect of three new bis-Schiff bases on mild steel corrosion in 0.5 M HCl was studied by the weight loss method and the electrochemical method.

Inhibitory effect of melatonin on nitric oxide synthase in rat enteric nervous system

2001 ◽  
Vol 120 (5) ◽  
pp. A176-A176
Author(s):  
P KOPPITZ ◽  
M STORR ◽  
D SAUR ◽  
M KURJAK ◽  
H ALLESCHER
Keyword(s):  
Nitric Oxide ◽  
Nervous System ◽  
Nitric Oxide Synthase ◽  
Enteric Nervous System ◽  
Inhibitory Effect ◽  
Oxide Synthase
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