scholarly journals (47)Studies on the Bending of Lead Dioxide Layer in Course of Electroplating by means of Lead Salt Solution.III. The Relation between Bending of Lead Dioxide Layer and Current Density and Temperature in Course of Electrolysis of Lead Nitrate Solution.

1950 ◽  
Vol 53 (3) ◽  
pp. 97-100
Author(s):  
Yasuichi Shibasaki
Keyword(s):  
Current Density ◽  
Lead Dioxide ◽  
Nitrate Solution ◽  
Lead Nitrate ◽  
Lead Salt

Influence of Manganese Ions on the Electrodeposition Process of Lead Dioxide in Lead Nitrate Solution

2019 ◽  
Vol 55 (5) ◽  
pp. 364-369
Author(s):  
Yingwu Yao ◽  
Chunjiao Huang ◽  
Haishu Dong ◽  
Feng Wei ◽  
Xin Chen
Keyword(s):  
Lead Dioxide ◽  
Nitrate Solution ◽  
Lead Nitrate ◽  
Manganese Ions ◽  
Electrodeposition Process

scholarly journals SUBMICROSCOPIC ORGANIZATION OF THE POSTSYNAPTIC MEMBRANE IN THE MYONEURAL JUNCTION

1963 ◽  
Vol 17 (3) ◽  
pp. 571-586 ◽  
Author(s):  
Bertalan Csillik
Keyword(s):  
Nitrate Solution ◽  
Lead Nitrate ◽  
Postsynaptic Membrane ◽  
Molecular Organization ◽  
Polarization Microscopy ◽  
Striated Muscles ◽  
Electron Microscopic ◽  
Supramaximal Stimulation ◽  
Subneural Apparatus ◽  
Good Agreement

Cross-striated muscles of frogs and rats were fixed in 3.3 per cent lead nitrate solution. Frozen sections 30 micra thick were mounted in different media and observed by polarization microscopy. The subneural apparatus of myoneural junctions exhibits a strong birefringence in these sections. Birefringence is exerted by a highly organized lipoprotein framework (postsynaptic material) which builds up the "organites" (junctional folds) of the postsynaptic membrane. Synaptic cholinesterase is closely associated with this material. Freezing and/or formalin fixation results in a destruction of the molecular organization of the postsynaptic material, but does not influence the synaptic enzyme activity. It is hypothesized from this study that the junctional folds (postsynaptic "organites") consist of regularly arranged, sheet-like lamellar micellae in the frog and of less regular, mainly radially arranged submicroscopic units in the rat. The micellar organization as revealed by polarization analysis is in good agreement with the electron microscopic findings reported in the literature. Intramicellar protein molecules of the resting postsynaptic membrane are arranged longitudinally, lipids transversely. Supramaximal stimulation or treatment with acetylcholine + eserine results in a disorganization of proteins and a rearrangement of lipids. Denervation results in a rearrangement of lipids without any significant alterations of proteins. All these functional stresses influence only the molecular and not the micellar structure of the membrane. The function of the organized lipoprotein framework as an acetylcholine receptor is suggested.

scholarly journals ADSORTION ISOTHERM OF LEAD ON CALCIUM CARBONATE

2019 ◽  
Vol 50 (Special) ◽  
Author(s):  
Al-Hassoon & et al.
Keyword(s):  
Calcium Carbonate ◽  
Adsorption Capacity ◽  
Mathematical Description ◽  
Nitrate Solution ◽  
Lead Nitrate ◽  
High Capacity ◽  
Langmuir Equation ◽  
Bonding Energy ◽  
Lead Adsorption ◽  
Single Batch

This study investigate the effect of concentration of lead ions (Pb2+) at 0,1, 2, 3, 4, 5, 10,20,30, 40,50 and 100 mg L-1, concentrations of the quantity of the adsorbed Pb on surface of calcium carbonate at a temperature of 298° Kelvin with all other variables remained constant, was carried out and this experiment was conducted in a single batch and using lead nitrate solution . The results showed that quantity of the adsorbed lead increased from 2.6 to 1924 mg kg-1 Calcium carbonate, and when single and two surface  Langmuir, Freundlich, Temkin, Dubinin and Polani equations were applied, they were able to describe lead adsorption on the surface of calcium carbonate at the used concentrations. The two surface Langmuir equation was  most efficient in used mathematical description of  lead adsorption, and the bonding energy (K) with the first and second surfaces were  4.02 and 1613.42 L mg-1 respectively. The adsorption capacity (Xm) values with the first and second surfaces were 0.25 and 0.89 mg    kg -1 respectively , and this clearly indicated to high capacity of the second surface (carbonate surface) to adsorb lead.

scholarly journals Study on Anodic Oxidation parameters for removal of pesticide Imidacloprid on a modified tantalum surface by lead dioxide film

2020 ◽  
Keyword(s):  
Current Density ◽  
Crop Production ◽  
Ph Value ◽  
Lead Dioxide ◽  
Oxygen Demand ◽  
Electrochemical Process ◽  
Order Kinetic ◽  
Initial Ph ◽  
Transport Control ◽  
Dioxide Film

<p>The commercial imidacloprid (IMD) insecticide [1-(6-chloro-3-pyridinyl) methyl-4,5-dihydro-N-nitro-1H-imidazole-2-amine] is widely used for the enhancement of crop production, but the intensive use of this insecticide has caused serious environmental problems. This work presents an electrochemical process for the removal of this insecticide using galvanostatic electrolysis at modified tantalum surface by lead dioxide film anode (Ta(PbO2)) anode. The electrolytic process was monitored by chemical oxygen demand (COD). The influence of operating parameters, such as current density, initial concentration of IMD, temperature and initial pH value was investigated. The COD decay follows a pseudo first-order kinetic and the process was under mass transport control. COD removal reach 97% when using an apparent current density of 100 mA cm−2, initial COD of 953 mg L−1 and at 25 °C after 4.5 h electrolysis time.</p>

scholarly journals Ammonia removal from fertilizer plant effluents by a coupled electrostatic shielding based electrodialysis / electrodeionization process

2013 ◽  
Vol 14 (4) ◽  
pp. 468-476
Keyword(s):  
Electric Field ◽  
Ammonium Nitrate ◽  
Current Density ◽  
Pure Water ◽  
Nitrate Solution ◽  
Ionic Current ◽  
Ammonia Removal ◽  
Fertilizer Plant ◽  
Ammonium Nitrate Solution ◽  
A Current

Electrically and ionically conducting graphite powder beds interposed between the anode and cathode inside an electrolytic setup are used as intermediate bipolar electrodes. The beds cause electric field discontinuity by eliminating the applied electric field locally within their mass and act as electrostatically shielded zones – ion and ionic current sinks and thus ion concentrating compartments, whereas the adjacent compartments become ion depleting compartments. The ion sinks were implemented in a coupled electrostatic shielding electrodialysis/electrodeionization process to remove ammonium nitrate from fertilizer plant wastewaters. The batch wise operated electrostatic shielding electrodialysis of a solution containing 1310 mg L-1 ammonium nitrate produced in 28 min at a current density of 15-30 A m-2 a concentrate ammonium nitrate solution which could be recycled to the fertilizer plant unit and a diluate containing 50 mg L-1 ammonium nitrate. The diluate was subsequently used as feed in the electrostatic shielding electrodeionization process to produce pure water of a NH4 + and NO3- ion concentration of less than 1 mg L-1 respectively with a flow rate of 5.51x10-4 dm3 s-1 and a current density of 50 A m-2.

Lead Hydroxide Nanowires Obtained from Lead Nitrate Solution by Adding Chloride Ions

2010 ◽  
Vol 123-125 ◽  
pp. 719-722 ◽  
Author(s):  
Jin Cheng ◽  
Xiao Ping Zou ◽  
Xiang Min Meng ◽  
Gang Qiang Yang ◽  
Xue Ming Lü ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Nitrate Solution ◽  
Lead Nitrate ◽  
Chloride Ions ◽  
Solution Phase ◽  
Controlled Experiments ◽  
Selected Area Electron Diffraction ◽  
Nitrate Precursor ◽  
Lead Hydroxide ◽  
Phase Chemical

The synthesis of lead hydroxide nanowires by solution-phase chemical reactions of lead nitrate with alkali by adding sodium chloride was reported. The obtained lead hydroxide nanowires have a length of a few micrometers and a diameter of about several tens of nanometers. The selected-area electron diffraction reveals that these lead hydroxide nanowires are single crystalline. Controlled experiments indicate that lead hydroxide nanowires prefer to form at higher concentration of chloride ions in lead nitrate precursor solutions, such as Cl- : Pb2+ = 5:1 and 6:1.

Lead Oxide Plate Precipitates from Lead Nitrate Solution

2010 ◽  
Vol 123-125 ◽  
pp. 1243-1246
Author(s):  
Gang Qiang Yang ◽  
Xiao Ping Zou ◽  
Xiang Min Meng ◽  
Jin Cheng ◽  
Xue Ming Lü ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sodium Chloride ◽  
Lead Oxide ◽  
Nitrate Solution ◽  
Lead Nitrate ◽  
Chloride Anion ◽  
Distilled Water ◽  
Lead Monoxide ◽  
Reaction Solution ◽  
Nitrate Solutions

In this paper, a simple and controllable method to fabricate - and -PbO is reported. Lead nitrate as precursor was dissolved in 50ml distilled water, and was heated to 80oC. Sodium chloride was added into the lead nitrate aqueous solution. During the process, -PbO deposition will be obtained when we add lead nitrate solutions with KOH pellets without chloride anion. When we add lead nitrate solutions with KOH pellets with a little chloride anion, there will produce -PbO deposition. Our results indicate that the concentration of chloride anion and temperature of reaction solution affects the crystal morphologies and modifications of lead monoxide plate precipitates from lead nitrate solution and we can selectively and controllably produce - or -PbO by this way.

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