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Yadav, M.
- Synthesis and Characterization of Molybdenum and Tungsten Complexes of N-Nicotinoyl-N'-2-Thiophenethiocarbohydrazide
Abstract Views :213 |
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Authors
Affiliations
1 Department of Applied Chemistry, ISM Dhanbad-826004, IN
2 Department of Chemistry, SDJ PG College, Azamgarh, UP, IN
1 Department of Applied Chemistry, ISM Dhanbad-826004, IN
2 Department of Chemistry, SDJ PG College, Azamgarh, UP, IN
Source
Asian Journal of Research in Chemistry, Vol 5, No 1 (2012), Pagination: 79-82Abstract
Molybdenum and tungsten complexes of the type M2O4L2(H2O)2, where M = Mo(V), W(V), LH = N-nicotinoyl-N'-2- thiophenethiocarbohydrazide (H2NTTH), have been synthesized and characterized by using elemental analysis, magnetic susceptibility measurements, infrared spectra, 1HNMR, 13CNMR,ESR.and X-ray spectroscopic studies. Molar conductance measurements in DMF show non-ionic behaviour of all the complexes. Magnetic susceptibility measurements indicate diamagnetic nature of the complexes. Although the complexes are ESR inactive, +V oxidation state of metal ions in octahedral geometry has been suggested on the basis of electronic spectral studies. IR and electronic spectral studies indicate dinuclear - type of complexes with M2O4 2+ moiety. IR spectral data suggest monoanionic bidentate mode of bonding for the ligand. The 1H NMR and 13C NMR spectra are found to be in good agreement with the proposed stoichiometry. X-ray powder diffraction of the complexes exhibit amorphous nature of the complexes.
Keywords
Molybdenum, Tungsten, Thiocarbohydrazide Complexes.
- Corrosion Inhibitors for Acidization of Petroleum Oil Well
Abstract Views :215 |
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Authors
M. Yadav
1,
Usha Sharma
1
Affiliations
1 Department of Applied Chemistry, ISM, Dhanbad-826004, IN
1 Department of Applied Chemistry, ISM, Dhanbad-826004, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 9 (2011), Pagination: 1404-1407Abstract
An important method of protecting metallic materials against deterioration due to corrosion is by the use of corrosion inhibitors. In the present investigation, corrosion inhibition study of two imidazoline derivatives, 1-(2-hydroxy ethyl)-2-methylimidazoline (Inh I) and 1-(2-hydroxyethyl)-2-decylimidazoline (Inh II)) have been performed for oil-well tubular steel (N-80) in 15% HCl using weight loss, electrochemical polarization and SEM techniques. The inhibition efficiencies of the inhibitors follow the sequence, Inh II > Inh I. The results showed that inhibition efficiency of both the inhibitors increased with increase in inhibitors concentration. Both inhibitors act as mixed inhibitors and obey the Langmuir adsorption isotherm. Corrosion inhibition mechanism take place through adsorption phenomenon.Keywords
Imidazoline Derivatives, N80 Steel, 15% HCl, Corrosion Inhibition.- Inhibition of Corrosion of Copper by 4-Amino-3-Phenyl-5-Mercapto-1, 2, 4-Triazole in 3.5% Sodium Chloride Solution
Abstract Views :192 |
PDF Views:1
Authors
Affiliations
1 Department of Applied Chemistry, ISM University, Dhanbad, IN
2 Department of Chemistry, S.N. PG College, Azamgarh, IN
1 Department of Applied Chemistry, ISM University, Dhanbad, IN
2 Department of Chemistry, S.N. PG College, Azamgarh, IN
Source
Asian Journal of Research in Chemistry, Vol 3, No 4 (2010), Pagination: 938-942Abstract
In the present investigation 4-amino-3-phenyl-5-mercapto-1, 2, 4-triazole has been synthesized and studied as inhibitor for the corrosion of copper in 3.5 % NaCl solution. The inhibition efficiency of the compound have been evaluated by weight loss and electrochemical methods (Impedance spectroscopy and polarization curves). The surface study was done by using SEM techniques. The inhibitor appears to inhibit corrosion process through formation of protective film which was found to consist of Cu(I)-inhibitor complex, cuprous chloride, CuCl or CuCl2- complex ion or both on the surface.Keywords
Copper, Corrosion Inhibition, 3.5% NaCl Solution.- Mapping of Agroforestry Systems and Salix Species in Western Himalaya Agroclimatic Zone of India
Abstract Views :178 |
PDF Views:110
Authors
R. H. Rizvi
1,
R. Vishnu
2,
A. K. Handa
2,
S. Ramanan
2,
M. Yadav
2,
A. Mehdi
2,
R. K. Singh
3,
S. Londhe
3,
S. K. Dhyani
3,
J. Rizvi
3,
Punam
4,
Rameshwar Kumar
4,
Naved Qaisar
5
Affiliations
1 ICAR-CSSRI Regional Research Station, Lucknow 226 005, IN
2 ICAR-Central Agroforestry Research Institute, Jhansi 284 003, IN
3 World Agroforestry, South Asia Regional Programme, New Delhi 110 012, IN
4 Himachal Pradesh Krishi Vishvidyalay, Palampur 176 062, IN
5 Sher-e-Kashmir University of Agriculture and Technology, Srinagar 190 025, IN
1 ICAR-CSSRI Regional Research Station, Lucknow 226 005, IN
2 ICAR-Central Agroforestry Research Institute, Jhansi 284 003, IN
3 World Agroforestry, South Asia Regional Programme, New Delhi 110 012, IN
4 Himachal Pradesh Krishi Vishvidyalay, Palampur 176 062, IN
5 Sher-e-Kashmir University of Agriculture and Technology, Srinagar 190 025, IN
Source
Current Science, Vol 121, No 10 (2021), Pagination: 1347-1351Abstract
In the present study, agroforestry was mapped in nine districts from Western Himalayan Region. The agroforestry area in these nine selected districts was estimated to be 332127.55 ha (12.4%). Salix alba, an important agroforestry species, accounted for about 12% of total agroforestry area in three districts of Kashmir valleyKeywords
Agroclimatic Zone, Agroforestry Mapping, Object-Oriented Classification, Remote Sensing, Tree Species.Full Text
References
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