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College of Agriculture, India

Singh N.,Mahatma Jyotiba Phule Rohilkhand University | Srivastava A.,University of the Humanities | Srivastava P.C.,Gbpant University Of Agriculture And Technology | Srivastava N.,Mahatma Jyotiba Phule Rohilkhand University
Fresenius Environmental Bulletin | Year: 2011

The kinetics of adsorption and desorption of chlorpyrifos in soils of Himalayan tarai (mollisols) were studied using the miscible displacement technique under the laboratory conditions. The adsorption data of chlorpyrifos conformed to the first order kinetics and the computed values of adsorption rate constant (kads.) increased with depth and had a significant negative correlation with soil E.C.. The desorption data of chlorpyrifos also fitted well to two phase first order kinetics. However, no soil property individually showed any significant simple correlation with the desorption rate constant of chlorpyrifos (k1 des.). Adsorption rate constant (k ads) could be successfully predicted on the basis of soil sand; clay; organic C; and free iron oxide contents contents and soil B.C.. The faster desorption rate constant (k1 des) of chlorpyrifos could be predicted on the basis of soil sand; clay; and organic C contents and soil pH and E.C. while the slower desorption rate constant (k2 des.) could be estimated using sand; organic C; and free iron oxide contents and soil pH and E.C. © by PSP. Source


Chandra M.,Graphic Era University | Prakash O.,University of the Humanities | Bachheti R.K.,Graphic Era University | Kumar M.,Gbpant University Of Agriculture And Technology | Pant A.K.,University of the Humanities
Journal of Essential Oil-Bearing Plants | Year: 2016

Abstracts: The essential oil composition of Thymus linearis collected from two different locations (Harinagar; Nainital (TLHEO) & and Dhanachuli Nainital (TLEOD)) were analyzed by combination of GC and GC-MS. Total nine major constituents contributing to 93.6 % were identified in TLHEO and 89.3 % in TLDEO samples. Germacrene-D (65.1 %) and γ-terpinene (19.4 %) were identified as major constituents in TLHEO while thymol (66.8 %) and p-cymene (9.8 %) were identified in TLDEO. The oils and extracts were evaluated for DPPH radical scavenging ability, chelation of Fe2+, and Fe3+reducing power activities. The oils and extracts both showed good to moderate antioxidant activity in a dose dependent manner. Both oils and extracts also exhibited significant pharmacological activities (antipyretic, analgesic, and anti-inflammatory activities) compared to the standards (paracetamol, indomethacin and ibuprofen) tested on Swiss albino mice. Total phenolic assay of the aqueous ethanolic extracts determined by Folin-Ciocalteu method revealed total phenol (5.15 mg /100 mg), flavonols (0.26 mg /100 mg) and orthodihydroxy phenols (0.4 mg/100 mg) in Harinagar collection and (4.65 mg/ 100 mg), (0.52 mg/100mg) and (0.18 mg/100 mg) in Dhanachuli collection respectively. © 2016 Har Krishan Bhalla & Sons. Source


Agarwal V.,Gbpant University Of Agriculture And Technology | Alam S.,Defense Material Stores Research Development and Establishment | Rai A.K.,Allahabad University | Pant R.P.,National Physical Laboratory India
Journal of Nanostructured Polymers and Nanocomposites | Year: 2010

A supercritical carbon dioxide (scCO2) assisted process was developed to synthesize polyvinyl pyridine ferrite na-nocomposites (PvPyFN). The process involved synthesis of polyvinyl pyridine (PvPy) through rheoviscometrically monitored polymerization of 4-vinyl pyridine in presence of benzoyl peroxide under various reaction conditions in supercritical carbon dioxide (scCO2), followed by infusing ferrite nanoparticles into PvPy matrix at 1:2, w/w in scCO2 at 3000 psi, 40±1°C for 1.0 hr. This has afforded corresponding PvPyFN comprising volume concentration of ferrite nanoparticles into PvPy matrix ranging 0.563-2.043.The variation of rheoviscosity with molecular mass of PvPy was investigated through gel permeation chromatography. The ferrite nanoparticles were synthesized through treating different concentrations of FeCl2. 4H2O with ammonia solution at 80±1°C. The size of ferrite nanoparticles was calculated according to Debye Scherrer method and was found in the range of 11-20 nm. The formation of PvPyFN was ascertained through Uv-vis, FT-IR, XRD, Laser induced break down spectra, vibration sample magnetometry and scanning electron microscopy. All such PvPyFN were formed as chelate of ferrite with tertiary nitrogen of PvPy and comprise heterogeneous morphology, super paramagnetic characteristics with saturation magnetization ranging 15.2-35.8 emu/g. Source


Kumar R.,Gbpant University Of Agriculture And Technology | Tiwari S.N.,Gbpant University Of Agriculture And Technology
Pestology | Year: 2011

The fumigant toxicity of some plant oils was studied against Sitophilus oryzae, Rhizoprtha dominica and Tribolium castaneum. The plant oils of Trigonella foenumgraecum, Coleus aromaticus, Delbergia sisso, Asparagus racemosus, Lactuca sativa, Nigella sativa, Matricaria chamonilla, Withania somnifera, Styrax tonkinesis, Commifera mukul, Amomum subulatum, Dhatura metel, Nardostachys jatamansi, Sesamum indicum, Celastrus paniculatus, Bacopa monnieri, Psorelia corylifolia, Vitax nergundi at .02 and 0.4% (v/w) was found highly effective against R. dominica, Delbergia sisso, Lactuca sativa, Styrax tonkinesis, Sesamum indicum and Bacopa monnieri at 0.2 and 0.4% were found highly effective against T. castaneum in stored wheat. Source


Gupta M.,Gbpant University Of Agriculture And Technology | Upadhyay A.K.,Gbpant University Of Agriculture And Technology | Pandey N.N.,Coldwater Fisheries Research ICAR
Journal of Environmental Biology | Year: 2013

An attempt was made to distinguish the possible organoleptic differences between the pond reared and wild fish species of reservoirs and correlate these with the physicochemical characteristics of water bodies. The texture was found to firmer in wild varieties of fishes than pond reared fish, with best in Catla catla followed by Labeo rohita and Cirrhinus mrigala. All the cultured fishes had lighter colour than wild fish species which were darker in appearance. Comparatively, higher dissolved oxygen and transparency levels with low temperature and alkalinity levels were found in reservoirs. Hydrobiologically, the efficient ecosystem of reservoir was responsible for stronger texture and dark colouration in wild fish species. The fishes from reservoir exhibit tendency to lead active and agile life, comparatively the fishes from ponds are docile. Reservoirs have the potential of enhanced quality fish production. © Triveni Enterprises, Lucknow (India). Source

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