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Yamuna Nagar, India

Singh D.P.,National Institute of Technology Kurukshetra | Grover V.,National Institute of Technology Kurukshetra | Rathi P.,National Institute of Technology Kurukshetra | Jain K.,MLN College
Arabian Journal of Chemistry | Year: 2013

A new series of the complexes has been prepared by template condensation reaction of dimedone and carbohydrazide in the methanolic medium forming the complexes of the type [M(TML)X]X2; where TML is a tetradentate macrocyclic ligand; M = Cr(III), Fe(III); X = Cl-, NO3 -, CH3COO-. The complexes have been characterized with the help of elemental analyses, conductance measurements, molecular weight determination, magnetic measurements, electronic, infrared, far infrared spectral and structural studies. Molar conductance values indicate them to be 1:2 electrolytes. Electronic spectra along with magnetic moments suggest the five coordinate square pyramidal geometry for these complexes. The complexes have also been tested for their in vitro antibacterial activity by agar well diffusion method and macro dilution tube method. Some of the complexes showed good antibacterial activity. © 2013.


Kumar K.,CSIR - National Chemical Laboratory | Kamboj M.,National Institute of Technology Kurukshetra | Jain K.,MLN College | Singh D.P.,National Institute of Technology Kurukshetra
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2014

A novel series of the macrocyclic complexes of the type: [M(C 18H14N10O2)X2], where M = Co(II), Ni(II), Cu(II) and Zn(II); X = Cl-, NO3 - and CH3COO-, has been synthesized by template condensation of carbohydrazide and isatin in methanolic medium. The complexes were characterized by various physico-chemical techniques, such as elemental analyses, molar conductance measurements, magnetic measurements, and electronic, NMR, IR and EPR spectral studies. The low value of molar conductance indicates them to be non-electrolytes. Based on various studies, a distorted octahedral geometry was proposed for all the metal complexes. Metal complexes were tested for their in vitro antibacterial activities against some pathogenic bacterial strains and compared with standard antibiotic, Ciprofloxacin. Some of the tested complexes was found effective against Gram-positive bacterial strains. © 2014 Elsevier Ltd. All rights reserved.


Singh D.P.,National Institute of Technology Kurukshetra | Grover V.,National Institute of Technology Kurukshetra | Jain K.,MLN College
Journal of the Serbian Chemical Society | Year: 2011

A novel series of complexes of the type [M(C 28H 18N 6)X 2], where M=Co(II), Ni(II), Cu(II) or Zn(II) and X = Cl -, NO 3 - or CH 3COO -, were synthesized by template condensation of isatin and 1,2-diaminobenzene in methanolic medium. The complexes were characterized with the help of various physico- chemical techniques, such as elemental analyses, molar conductance measurements, magnetic measurements, and NMR, infrared and far infrared spectral studies. The low value of molar conductance indicates them to be non-electrolytes. Based on various studies, a distorted octahedral geometry may be proposed for all the complexes. All the synthesized macrocyclic complexes were also tested for their in vitro antibacterial activity against some pathogenic bacterial strains. The MIC values shown by the complexes against these bacterial strains were compared with those of the standard antibiotics linezolid and cefaclor. Some of the complexes showed good antibacterial activities.


Goyal S.K.,Kurukshetra University | Chaudhary B.S.,Kurukshetra University | Singh O.,Kurukshetra University | Sethi G.K.,MLN College | Thakur P.K.,Indian Institute of Remote Sensing
Journal of the Indian Society of Remote Sensing | Year: 2010

The present study has analyzed the variability in depth to water level below ground level (bgl) vis-à-vis groundwater development and rainfall from 1987 to 2007 in agriculture dominated Kaithal district of Haryana state in India. Spatial distribution of groundwater depth was mapped and classified into different zones using ILWIS 3.6 GIS tools. Change detection maps were prepared for 1987-1997 and 1997-2007. Groundwater depletion rates during successive decades were compared and critical areas with substantial fall in groundwater levels were identified. Further, block wise trends of change in groundwater levels were also analyzed. The water table in fresh belt areas of the district (Gulha, Pundri and Kaithal blocks) was observed to decline by a magnitude ranging from 10 m to 23 m. In Kalayat and Rajaund blocks, the levels were found fluctuating in a relatively narrow range of 4-9 m. During 1997-2007, the depletion has been faster compared to the preceding decade. Excessive groundwater depletion in major part of the district may be attributed to indiscriminate abstraction for irrigation and decrease in rainfall experienced since 1998. Changes in cropping pattern and irrigation methods are needed in the study area for sustainable management of the resource. © 2010 Indian Society of Remote Sensing.


Goyal S.K.,Kurukshetra University | Chaudhary B.S.,Kurukshetra University | Singh O.,Kurukshetra University | Sethi G.K.,MLN College | Thakur P.K.,Indian Institute of Remote Sensing
Environmental Earth Sciences | Year: 2010

Groundwater is a major resource for meeting huge domestic and agricultural requirements of Kaithal district in Haryana. Therefore, evaluation of its quality in terms of suitability for domestic and agricultural sectors is necessary for sustainable management of the resource. The present study has analyzed pre- and post-monsoon physico-chemical data of groundwater samples from bore wells spread over the entire district. Spatial distribution maps were generated for hydrogen ion concentration, total dissolved solids, total hardness, electrical conductivity, sodium adsorption ratio, residual sodium carbonate and percent sodium using the geographic information system. Furthermore, the study area was demarcated into different groundwater quality zones for domestic and agricultural use by applying various national and international standards. It was observed from the study that the groundwater was predominantly hard, alkaline and saline in nature. However, it was within safe limits for domestic use. Further, it was also experienced from the analysis that in about two-third parts of the district, groundwater was in desirable-to-permissible quality class for agricultural use but hazardous for soil as well as for crops in the remaining part. Also, a moderation in water quality was observed after the monsoon season, which can be attributed to a possible dilution due to groundwater recharge. © 2010 Springer-Verlag.

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