Nabira Mahavidyalaya

Kātol, India

Nabira Mahavidyalaya

Kātol, India
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Kadukar M.R.,Rashtrasant Tukadoji Maharaj Nagpur University | Yawalkar P.W.,Nabira Mahavidyalaya | Lochab S.P.,Inter University Accelerator Center | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University | Reddy B.S.,Sri Venkateswara Degree College
Ferroelectrics, Letters Section | Year: 2017

In the present article, polycrystalline low Z (Zeff = 8.19) LiAlO2:Dy/Eu phosphor prepared by simple wet chemical method. Thermoluminescence and some of the dosimetric characteristics of Dy/Eu activated LiAlO2 were reported. Samples in powder form were exposed to γ-ray irradiation with 137 Cs source for both LiAlO2:Dy and LiAlO2:Eu phosphors were studied for the first time. In case of LiAlO2:Dy phosphor shows one peak at 287°C and small hump at 335°C. However; LiAlO2:Eu phosphor shows glow peak at 272°C with a shoulder peak around 329°C. The TL sensitivity in both the cases were compared with CaSO4:Dy phosphor.LiAlO2:Dy sample have shown 1.23 times less sensitive than CaSO4:Dy and for LiAlO2:Eu is 5.6 times less sensitive than CaSO4:Dy.The TL response in the 0.001-0.043Gy dose range increased linearly with increase in radiation dose for both the samples. Fading study has been also done for both the samples. In addition to this trap parameters of LiAlO2:Dy/Eu were calculated by using computerized glow curve deconvolution and Chen's peak shape method. © 2017 Taylor & Francis Group, LLC.


Dhadade I.H.,Nabira Mahavidyalaya | Moharil S.V.,Rashtrasant Tukadoji Maharaj Nagpur University | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University | Rahangdale S.R.,Rashtrasant Tukadoji Maharaj Nagpur University
AIP Conference Proceedings | Year: 2016

In the Y2O3-Al2O3 system, compounds Y3Al5O12 (yttrium aluminum garnet, YAG),YAlO3 (yttrium aluminum perovskite, YAP), and Y4Al2O9(yttrium aluminate monoclinic, YAM) are well known. Though several soft chemical routes have been explored for synthesis of YAG, YAP and YAM, most of these methods are complex. Moreover, phase pure materials are not obtained in one step and prolonged annealing at temperatures around 1000°C is necessary. In this paper, one step combustion synthesis of the compound YAlO3:Dy3+ is reported using a modified procedure and employing mixed (glycine + urea) fuel. Powder X-ray diffraction patterns confirm the pervoskite phase of YAlO3. Thermoluminescence study shows linear response in wide dose range (0.2-1 KGy) suggest the possibility of the present phosphor in dosimeter application. © 2016 Author(s).


Dhadade I.H.,Nabira Mahavidyalaya | Moharil S.V.,Rashtrasant Tukadoji Maharaj Nagpur University | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University | Rahangdale S.R.,Rashtrasant Tukadoji Maharaj Nagpur University
AIP Conference Proceedings | Year: 2016

In the present paper one step combustion synthesis of compound Y3Al5O12:Ce3+ is reported using a modified procedure and employing mixed (Urea + Glycine) as fuel. Powder X-ray diffraction confirms the formation of said compound. Thermoluminescence study over the wide gamma exposure (1KGy - 13 KGy) Suggests the possible use of the phosphor in dosimetric application. © 2016 Author(s).


Khedkar T.,Nabira Mahavidyalaya | Koushik S.,Institute of Science | Gadhikar Y.,Government Vidarbha Institute of Science and Humanities
Annals of Neurosciences | Year: 2012

Background: The hypothalamic nuclei constitute that part of the corticodiencephalic mechanism that activates, controls and integrates the peripheral, autonomic mechanisms, endocrine activity and many somatic functions. Their full integration into behavior requires the neocortex, in particular the limbic system. Purpose: An antiserum against histamine was used to reveal the location and time of appearance of the amine in developing fetal hypothalamus. Although the expression pattern of histamine is well studied in mammals, less is known about it in humans. The neurotransmitter histamine plays a crucial role in co-ordinating mutiple inputs from various brain centres. Methods: In the present investigations the hypothalamus was studied in the human fetus ranging from 19 weeks of gestation (GW) to term by using immunocytochemistry. Distinct neurons that stained with Pischinger's methylene blue were obsereved from 19 GW to term. Sections adjacent to those that contained neurons were stained for histamine labeling. Immunoreactive neurons in the hypothalamus at 19 GW of gestation show relatively meager population. Results: Histamine immunoreactive (His-ir) neurons of the hypothalamus were divisible in lateral and ventrolateral subgroups at 19 GW to 24 GW At 32 GW along with the neuronal cell bodies some beaded fibers were visible. There was progressive increase in the histamine expressing neurons as the fetus grows. In term fetal specimens, two to three small groups of his-ir neurons gradually merged in a single large ventrolateral group. Conclusion: The findings of the present study provide for a better understanding of the chemoneuroarchitecture of histamine containing neurons in hypothalamus during second and third trimester of human fetal development.


Sharma A.B.,Nabira Mahavidyalaya | Sharma S.K.,Indian Institute of Science | Vishwas M.,Government Science College | Rao K.N.,Indian Institute of Science
AIP Conference Proceedings | Year: 2015

Titanium oxide (Titania) thin films were synthesized on different substrates via the sol-gel dip-coating method using alkoxide solution. Some selected samples were also prepared with different percentage of Lead (Pb). The influence of Pb addition in precursor sol on the optical properties of titanium dioxide thin films was studied. The optical transmittance in the visible region has increased with increase in weight percentage of lead. The refractive index was slightly decreased with Pb addition. Crystallization of these coatings was achieved through thermal annealing at temperatures above 400°C. The structural properties and surface morphology of the crystallized coatings were studied by Scanning Electron Microscopy. Increase in average grain size from 250 nm to 350 nm with increase in Pb concentration is observed. Films were appeared to more coarse with increase in Pb addition. An increase in Pb addition resulted increase in average roughness from 12 nm to 25 nm. © 2015 AIP Publishing LLC.


Kadukar M.R.,Rashtrasant Tukadoji Maharaj Nagpur University | Yawalkar P.W.,Nabira Mahavidyalaya | Choithrani R.,Barkatullah University | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University
Luminescence | Year: 2015

Dy3+ and Eu3+ activated Ca3Y2Si3O12 phosphors were synthesized by the solid-state synthesis method. The phosphors were characterized by X-ray diffraction (XRD), mechanoluminescence (ML), thermoluminescence (TL) and photoluminescence (PL) to determine structure and luminescence. For ML glow curves, only one peak was observed, as only one type of luminescence centre was formed during irradiation. The Ca3Y2Si3O12:Dy3+ TL glow curve showed a single peak at 151.55C and the Ca3Y2Si3O12:Eu3+ TL glow curve peaked at 323C with a small peak at 192C, indicating that two types of traps were activated. The trapping parameters for both the samples were calculated using Chen's peak shape method. Dy3+-activated Ca3Y2Si3O12 showed emission at 482 and 574 nm when excited by a 351 nm excitation wavelength, whereas the Eu3+-activated Ca3Y2Si3O12 phosphor PL emission spectra showed emission peaks at 613 nm, 591 nm, 580 nm when excited at 395 nm wavelength. When excited at 466 nm, prominent emission peaks were observed at their respective positions with very slight shifts. Copyright © 2015 John Wiley & Sons, Ltd.


Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University | Kore B.P.,Rashtrasant Tukadoji Maharaj Nagpur University | Yerpude A.N.,Rashtrasant Tukadoji Maharaj Nagpur University | Kohale R.L.,Rashtrasant Tukadoji Maharaj Nagpur University | And 2 more authors.
Optik | Year: 2015

Eu3+ activated Sr5SiO4Cl6 phosphor and Sr2P2O7 doped with Dy3+ are synthesized by solid state method and NaAlSiO4 doped with Tb3+ is prepared by a sol-gel method. All the prepared phosphors were characterized by X-ray powder diffraction (XRD), photoluminescence (PL) properties and CIE color co-ordinates. The emission peaks of Eu3+ activated Sr5SiO4Cl6 phosphor are located at 597 nm and 616 nm corresponding to the 5D0→7F1 and 5D0→7F2 transitions of Eu3+, under near-UV excitation (395 nm). Photoluminescence emission spectra of Sr2P2O7:Dy3+ phosphor shows an excitation at around 354 nm gives emission peaks at 484 nm (blue) and 575 nm (yellow) are ascribed to the typical 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions of Dy3+ respectively. Upon excitation with 379 nm, it is observed that there is a strong emission at around 545 nm corresponding to the 5D4-7F5 transition of Tb3+ in NaAlSiO4 host. CIE color co-ordinates of Sr5SiO4Cl6:Eu3+ phosphors are (x = 0.6825, y = 0.3172), Sr2P2O7:Dy3+ phosphor of color blue were (x = 0.0734, y = 0.1850) and color yellow were (x = 0.4787, y = 0.5202), CIE color co-ordinates of NaAlSiO4 doped with Tb3+ are (x = 0.2801, y = 0.7117). The results indicate that all the prepared phosphors might be promising candidates as blue, green, yellow and red emitting components for potential solid-state lighting application and green lighting technology. © 2015 Elsevier GmbH. All rights reserved.


Borkar A.D.,Nabira Mahavidyalaya | Heda P.B.,Visvesvaraya National Institute of Technology | Umare S.S.,Visvesvaraya National Institute of Technology
Materials Research Innovations | Year: 2011

Poly(aniline-co-o-anisidine)s were synthesised by chemical peroxidative copolymerisation of aniline with o-anisidine in aqueous acidic medium under nitrogen atmosphere. The molar feed ratio of the monomers was varied in copolymerisation reaction in order to obtain copolymers of different compositions. The actual monomeric composition in the copolymers was estimated by integrated proton nuclear magnetic resonance spectroscopy. Owing to the difference in reactivities of aniline and o-anisidine, the content of o-anisidine in the copolymer was higher than the monomer taken in the reaction mixture. The electrical conductivity of the copolymers strongly depends on the amount of aniline incorporated, and it decreases with increasing oanisidine content in the copolymer, which may lower the structural regularity of the copolymer. It is suggested from the temperature dependence of the electrical conductivity that the electrical conduction mechanism of the copolymer is polaron hopping conduction similar to that of homopolymers. The applications of copolymer as anion exchange resin and acid-base indicator are presented. © W. S. Maney & Son Ltd. 2011.


Puri P.J.,Rashtrasant Tukadoji Maharaj Nagpur University | Yenkie M.K.N.,Rashtrasant Tukadoji Maharaj Nagpur University | Battalwar D.G.,Rashtrasant Tukadoji Maharaj Nagpur University | Gandhare N.V.,Nabira Mahavidyalaya | Dhanorkar D.B.,Maharashtra State Power Generation Company
Rasayan Journal of Chemistry | Year: 2010

This paper is intended to be a study concerning lake water pollution in Nagpur city, Maharashtra (India). Regional and seasonal variation of some physico-chemical parameters such as nutrients salts, total nitrogen and total phosphorous, in addition, temperature, pH, conductivity, dissolved oxygen (D0), chemical oxygen demand(COD), biological oxygen demand (BOD) and suspended solid (SS) were determined for the estimation of pollution load during the period from January to December 2008. The sampling points were selected on the basis of their importance. A monitoring network was set at representative site in the whole studied area and water samples were taken on a regular basis for laboratory analysis. Important variations have occurred in the investigated area as a result of human activity and discharge of waste water. During present study, Ambazari, Gandhisagar and Futala Lake water showed significant pollution as compared to Gorewada Lake. This is attributable to pollution due to human activities such as immersion of idols of God and Goddess during festival season, surface runoff resulting from rainfall, washing activities and sewage (poor) around Lake. All the calculated water quality parameters in studied lakes showed fair water quality rating in autumn season which then change to medium in rainy season and higher during summer season. The situation is alarming and degradation is in continuous process, therefore immediate action is required for its better management. © 2010 RASĀYAN. All rights reserved.


PubMed | Nabira Mahavidyalaya, Rashtrasant Tukadoji Maharaj Nagpur University and Barkatullah University
Type: Journal Article | Journal: Luminescence : the journal of biological and chemical luminescence | Year: 2016

Dy(3+) and Eu(3+) activated Ca3Y2Si3O12 phosphors were synthesized by the solid-state synthesis method. The phosphors were characterized by X-ray diffraction (XRD), mechanoluminescence (ML), thermoluminescence (TL) and photoluminescence (PL) to determine structure and luminescence. For ML glow curves, only one peak was observed, as only one type of luminescence centre was formed during irradiation. The Ca3Y2Si3O12:Dy(3+) TL glow curve showed a single peak at 151.55 C and the Ca3Y2Si3O12:Eu(3+) TL glow curve peaked at 323 C with a small peak at 192 C, indicating that two types of traps were activated. The trapping parameters for both the samples were calculated using Chens peak shape method. Dy(3+)-activated Ca3Y2Si3O12 showed emission at 482 and 574 nm when excited by a 351 nm excitation wavelength, whereas the Eu(3+)-activated Ca3 Y2Si3O12 phosphor PL emission spectra showed emission peaks at 613 nm, 591 nm, 580 nm when excited at 395 nm wavelength. When excited at 466 nm, prominent emission peaks were observed at their respective positions with very slight shifts.

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