Sardar Patel Mahavidyalaya

Chandrapur, India

Sardar Patel Mahavidyalaya

Chandrapur, India
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Dhankar R.P.,Sardar Patel Mahavidyalaya | Rahatgaonkar A.M.,Institute of Science | Chorghade M.S.,Chorghade Enterprises | Tiwari A.,Linköping University
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2012

2-oxo-4-phenyl-6-styryl-1,2,3,4-tetrahydro-pyrimidine-5-carboxylic acid (ADP) was complexed with acetates of Mn(II), Ni(II), Cu(II) and Zn(II). The structures of the ligand and its metal complexes were characterized by microanalysis, IR, NMR, UV-vis spectroscopy, magnetic susceptibility and TGA-DTA analyses. Octahedral and square planar geometries were suggested for the complexes in which the central metal ion coordinated with-O donors of ligand and acetate ions. Each ligand binds the metal using carboxylate oxygens. The ligand and complexes were evaluated for their antimicrobial activities against different species of pathogenic bacteria and fungi. The present novel pyrimidine containing complexes could constitute a new group of antibacterial and antifungal agents. © 2012 Elsevier B.V. All rights reserved.


Manik U.,Sardar Patel Mahavidyalaya | Gedam S.C.,Kzs Science College | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University
Luminescence | Year: 2015

The KNaSO4 microphosphor doped with Ce or Ce and Dy prepared by a wet chemical method was studied by scanning electron microscopy (SEM) and characterized by photoluminescence (PL). KNaSO4 has a 5-μm particle size detected by SEM. The KNaSO4:Ce3+ spectrum shows a single emission band at 327 nm for an excitation of 269 nm due to 5d → 4f transition of the Ce3+ ion, indicating weak spin orbiting coupling of the Ce3+ ground state. Efficient energy transfer takes place from Ce3+ → Dy3+ sublattices indicating that Ce3+ could effectively sensitize Dy3+ (orange emission) and that the Ce3+ emission weakens significantly in KNaSO4. The powder form of prepared KNaSO4 show negligible change in morphologies and hence no effect on the particle size. The characteristics of this powder could provide improved luminescence properties. The development and understanding of this photoluminescence and the effect of Dy3+ on KNaSO4: Ce3+ are discussed. Copyright © 2014 John Wiley & Sons, Ltd.


Kamble R.K.,Sardar Patel Mahavidyalaya
Indian Journal of Environmental Protection | Year: 2012

Mixing heights observations were recorded in Dehra village by using minisonde technique in summer season for 3 day at an interval of 3 hr so as to have a clear idea of diurnal variation of mixing heights from the study area. The results depicts that maximum mixing height from the study area was 1650 m above ground level in afternoon (2.30 pm), while diurnal variation indicated ground based inversion upto a height of about 300 m above ground level, that is nil mixing height during late night (2.30 am) and early morning (5.30 am) hours. The diurnal variation of mixing height was in accordance with incoming solar radiation, as the day progresses so the mixing height and vice versa. The maximum mixing height of 1650 m above ground level indicated the volume available for dilution, dispersion and transportation of air pollutants in the lower atmosphere which are emitted by anthropogenic and industrial activities, thus reducing the chances of air pollution episodes in the study area. © 2012 - Kalpana Corporation.


Kamble R.K.,Sardar Patel Mahavidyalaya
Indian Journal of Environmental Protection | Year: 2012

The ambient air sampling was carried out in 9 locations distributed in upwind and downwind direction of Chandrapur industrial cluster region comprises of MIDC Chandrapur, Ghugus, MIDC Tadali and Ballarpur area for dust fall rate and sulphation rate during December 2011. Dust fall rate was estimated by gravimetric method and sulphation rate by lead peroxide candle method. For both parameters sampling period was 30 day. The results indicated that dust fall rate in the study area was higher as compared with non industrial area. Maximum dust fall rate was recorded in Dadmahal ward 218.92 MT/km2/month, followed by Padoli, Nakoda and Ghugus; whereas minimum was observed in Visapur 13.49 MT/km2/month. The sulphation rate in the study area was found to be minimum of 0.0686 mg SO3/100 cm2/day in Pathanpura, whereas maximum in Nakoda 1.234 mg SO3/100 cm2/ day. The sulphation rate in Babupeath the background concentration sampling site was found to be 0.137 mg SO3/100 cm2/day. Form the result it is evident that dust fall rate and sulphation rate was higher in downwind direction as compared with upwind. © 2012 - Kalpana Corporation.


Amgaokar R.D.,Sardar Patel Mahavidyalaya | Kamble R.K.,Sardar Patel Mahavidyalaya
Indian Journal of Environmental Protection | Year: 2012

Defluoridation of water was carried out by adsorption using Basil (Ocimum sanctum, Lamiaceae) leaves, stem and extract of fresh leaves at various doses and pH levels by boiling and shaking methods as a bioadsorbent. With initial fluoride concentration of 5 ppm, it was observed that maximum 94% of fluoride can be removed at a dose of 75 mg of fresh basil leaves for a sample of 100 mL at pH of 9.0 for a contact period of 20 min, fresh basil stem with a dose of 100 mg/100 mL had a removal efficiency of 75% at pH 6, whereas for dry leaves and dry stem at a dose of 250 mg/100 mL, the removal efficiency was 78% and 74% at pH of 6 and 7, respectively. This makes the fluoride concentration within the permissible limit of Indian standard for drinking water (IS 10500:1991, fluoride 1.0-1.5 ppm). The efficiency of adsorption of fluoride ion was affected by pH, adsorbent dose, type and size of adsorbent used. This developed technique is cost effective, environment friendly and most important easy to understand and can be adopted in rural as well as urban background throughout the year. © 2012 - Kalpana Corporation.


Manik U.,Sardar Patel Mahavidyalaya | Gedam S.C.,Kzs Science College | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University
Journal of Luminescence | Year: 2013

The phase formation of the compound Na2Mg(SO4) 2 prepared by a wet chemical method was confirmed by the X-ray powder diffraction (XRD) pattern. Photoluminescence (PL) of Na2Mg(SO 4)2: Ce3+ shows strong emission at 322 nm, and this phosphor is also efficient for Ce3+→ Dy3+ and Ce3+→ Mn2+ energy transfers. The Dy3+ emission by Ce3+→ Dy3+ under UV wavelength is peaking at 475 nm and 572 nm for an excitation of 254 nm due to 4F 9/2 →6H15/2 and 6H 13/2 transitions, whereas Ce3+→Mn2+ is peaking at 515 nm due to 4T1→6A 1 transitions. The Tb3+ emission by Ce3+→ Tb3+ under UV wavelength is peaking at 490, 529, 546 nm, (with a small peak at 586 nm) for the excitation of 352 nm due to 5D 4→7FJ (J=4, 5, 6) transitions. The purpose of the present study is to develop and understand the photoluminescence and effect of Dy3+, Mn2+ or Tb3+ co-doping in Na2Mg(SO4)2:Ce3+ new luminescent materials, which can be the green phosphor in many applications such as lamp phosphors. © 2012 Elsevier B.V.


Patil D.B.,Institute of Science | Madhamshettiwar S.V.,Sardar Patel Mahavidyalaya
Oriental Journal of Chemistry | Year: 2014

Recovery of monomer hexamethylene diamine(HMD) in the form of dibenzoyl derivative of hexamethylene diamine (DBHMD) from Nylon waste rope powder was carried out by degradation of Nylon waste powder of nylon rope waste. The molecular weight of nylon waste powder was found to be 26582. The minimum amount of nylon waste powder and hydrochloric acid required for maximum recovery of HMD and DBHMD was found to be 3g and 5N,50ml hydrochloric acid respectively. Further it was observed that the maximum time and temperature required for getting maximum yield of DBHMD was 120 minutes and 80°C respectively.


Chandekar A.V.,Sardar Patel Mahavidyalaya | Kamble R.K.,Sardar Patel Mahavidyalaya
Indian Journal of Environmental Protection | Year: 2010

Groundwater sampling was carried out at 25 locations from dug wells and bore wells in Rajura tehsil in Chandrapur district during post monsoon season (October 2009) to assertion groundwater fluoride concentration. SPADNS method was used to estimate groundwater fluoride concentration. Results revealed that the groundwater fluoride concentration in 10 sampling locations (40 %) was within the limits of Indian standard (1.0-1.5 ppm) whereas in 6 sampling locations (24%) it was above the permissible limit (more than 1.5 ppm) and in 9 sampling locations (36 %) it was below the desirable limit (less than 1.0 ppm). Number of inhabitants from the study area showed known symptoms of dental fluorosis and the onset of skeletal fluorosis. © 2010 - Kalpana Corporation.


PubMed | Sardar Patel Mahavidyalaya, Kzs Science College and Rashtrasant Tukadoji Maharaj Nagpur University
Type: Journal Article | Journal: Luminescence : the journal of biological and chemical luminescence | Year: 2016

KNaSO4 microphosphor doped with Ce,Gd and Ce,Tb and prepared by a wet chemical method was studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) characterization. KNaSO4 has a 5-m particle size detected by SEM. KNaSO4:Ce(3+),Tb(3+) showed blue and green emission (at 494nm, 557nm, 590nm) of Tb(3+) due to (5)D(4) (7)F(J) (J=4, 5, 6) transitions. KNaSO4:Ce(3+),Gd(3+) showed luminescence in the ultraviolet (UV) light region at 314nm for an excitation at 271nm wavelength. It was observed that efficient energy transfer took place from Ce(3+) Gd(3+) and Ce(3+) Tb(3+) sublattices indicating that Ce(3+) could effectively sensitize Gd(3+) or Tb(3+) (green emission). Ce(3+) emission weakened and Gd(3+) or Tb(3+) enhanced the emission significantly in KNaSO4. This paper discusses the development and understanding of photoluminescence and the effect of Tb(3+) and Gd(3+) on KNaSO4:Ce(3+).


PubMed | Sardar Patel Mahavidyalaya, Kzs Science College and Rashtrasant Tukadoji Maharaj Nagpur University
Type: Journal Article | Journal: Luminescence : the journal of biological and chemical luminescence | Year: 2015

The KNaSO4 microphosphor doped with Ce or Ce and Dy prepared by a wet chemical method was studied by scanning electron microscopy (SEM) and characterized by photoluminescence (PL). KNaSO4 has a 5-m particle size detected by SEM. The KNaSO4:Ce(3+) spectrum shows a single emission band at 327 nm for an excitation of 269 nm due to 5d 4f transition of the Ce(3+) ion, indicating weak spin orbiting coupling of the Ce(3+) ground state. Efficient energy transfer takes place from Ce(3+) Dy(3+) sublattices indicating that Ce(3+) could effectively sensitize Dy(3+) (orange emission) and that the Ce(3+) emission weakens significantly in KNaSO4. The powder form of prepared KNaSO4 show negligible change in morphologies and hence no effect on the particle size. The characteristics of this powder could provide improved luminescence properties. The development and understanding of this photoluminescence and the effect of Dy(3+) on KNaSO4:Ce(3+) are discussed.

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