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Volume 3 February 2015 (Yearly) http://www.vpmthane.org/BNB/JBNB.aspx Volume 3 February 2015 (Yearly) Exploration is the engine that drives innovation. Innovation drives economic growth. So let's all go exploring. J B.N.Bandodkar College of Science Editor’s Message …… There is lot of challenges where the emergent economies face in the realm of basic necessities in life. Stakeholder’s unity, collaboration on diversified issues and technologies may confront in bringing up economic change in society. One of the key objectives of research is to usability and application of diversified issues and technologies. With this motto, VPM’s B. N. Bandodkar College, Thane bestow trail to our learners for adoptions of scientific temperament. The main feature of this issue is Mosquito Repellents, hand sanitizer, Contribution of Bhaskaracharya in Modern Mathematical Concepts, Discovery in Database, Pre-Computer Crimes and Their Impacts, Soil Pollution, Chemistry a Curse or a Blessing, Vermicomposting, Electromagnetic Radiations, Organic Foods, Traffic in Mumbai, Hence the purpose of the e- journal is to have constructive decisions by the student for the development pathways for emergent country. We intended to publish reports, review articles, short communications, monographs, research activities, new innovative procedures and news that help us in updating society’s knowledge. Our main emphasis is to promote students scientific papers of good quality. We would like to thank all the contributing authors for providing such a rich variety of outstanding research articles on a broad range of exciting topics. “A good scientist and student know the right answers. Great scientist and student know the right questions.” Dr. (Mrs) M.K.Pejaver Dr. (Mrs) A.S.Goswami-Giri J B.N.Bandodkar College of Science Chief Editor Editor Dr. (Mrs) M.K.Pejaver Dr. (Mrs) A.S.Goswami-Giri Principal Co-ordinator B.N.Bandodkar College of Science Research Committee Chedani Bunder Rd. Thane. B.N.Bandodkar College of Science Chedani Bunder Rd. Thane. Editorial Board Dr. R.P. Athalye Dr. M.N. Nyayate Dr. M.V. Rathnam Dr. (Mrs.) N. N. Patil Dr. Moses Kolet Dr. M. Saha Mrs. M. J. Gholba Mrs. Renuka Sabhapathi Dr.V.M. Jamdhade Dr. Kalpita Muley Available online www.vpmthane.org J BNB INDEX Sr.No Title Page No 1 Synthesis of Eu3+ activated orthosilicate phosphors by self combustion 1-8 synthesis used for white light emitting diodes. U. B. Gokhe1*, S. K. Omanwar 2 2 Investigations On Bread Mould Rhizopus Stolonifer (Ehrenb.:Fr.) Vuill. 9-17 Moses Kolet* and Seema S. Khavale 3 Modern Technology Pre-Computer Crimes and Their Impacts 18-25 Renuka Sabapathi and Pradnya Pawar 4 Knowledge Discovery in Database Using Data Mining 26-37 Renuka Sabapathi and Sony Yadav 5 Traffic in Mumbai 38-41 Darshan H.Mahajan ,Nikhil D.Argade, Aniket P.Bagul and Sudhir K.Bhosale* 6 Imporatnce of Organic Foods 42-45 Ankita Dharma and Anita Goswami-Giri 7 Immune Boosters 46-50 Vaibhavi V. Gujar and Anita Goswami-Giri 8 Plant Based Mosquito Repellents: A Review 51-57 Shaikh, K.I.A., Jamdhade, V.M. and Saha, M. 9 Contribution Of Bhaskaracharya In Modern Mathematical Concepts: An 58-66 Overview Minal Wankhede Barsgade 10 Preliminary Phytochemical Evaluation of Tridax Procumbens L. 67-74 Deshmukh, A. P. Phirke, S. S. and Saha, M. 11 Efficiency of pharmaceutical reactions 75-80 Anita S. Goswami-Giri 12 Studies on Fungi from Indoor Corridors of Buildings 81-84 Moses Kolet and Ruchita Dhanavade 13 Role of Biochemistry in Society 85-88 Anita S. Goswami-Giri and Monali Torane STUDENTS CORNER Available online www.vpmthane.org J BNB SR. TITLE PAGE NO NO 1 SOIL POLLUTION IN MUMBAI 89-91 Anurag R.Tiwari, Sanket R.Bhole, Ashish R.Jaiswal and Sudhir K.Bhosale 2 CHEMISTRY A CURSE OR A BLESSING. 92-103 Prachi.N. Vishwakarma , Madhuri.S.Desai , Sneha .M.Singh, Bhavesh.M.Garg, Ajit.A.Raut 3 JATROPHA curcus used as a Biofuel 104-105 Shewta Kumbhar 4 COLD DRINKS AND PESTICIDES 106-117 Anurag Tiwari and Akash Jaiswal 5 Vermicomposting: A Novel Approach For Microbiological Waste Treatment 118-124 Kalpita Mulye, Aaditya Chhatre, Aniket Bagul, Hanzel Saldhana, Raghavi Murai, Jayashree Pawar 7 Isolation and identification of novel agar digesters in earthworm 125-127 (Eisenia fetida) gut Jayashree Pawar, Kalpita Mulye, Darshan Mahajan, Vaishnavi Samant, Tanishka Bagwe. 8 Study of Effect Of Electromagnetic Radiations Emitted By Mobile Tower On 128-131 Representative Microbial System Thorat, S. Sonawane, J. Talker, E. Talker, A. Raj, J. Pawar* K. Mulye, V.* 9 Isolation and Identification of LDPE Degrading Organisms from 132-136 Domestic Sludge Samples Jayashree Pawar, Kalpita Mulye, Aniket Bagul, Aditya Chhatre 9 Formulation and efficacy of hand sanitizer 137-141 Elizabeth Talker, Judith Talker, Vinaya Thorat, Jayashree Pawar*, Kalpita Mulye* Please Note: The Authors of the papers are alone responsible for the technical content of the papers and reference cited therein. However students’ papers are considered as apprentice. As a condition of publication, all authors must transfer copyright to Journal of B.N.Bandodkar College (JBNB) Thane. How to submit: Authors are required to submit manuscripts electronically by Email: [email protected] Available online www.vpmthane.org J BNB SYNTHESIS OF EU3+ ACTIVATED ORTHOSILICATE PHOSPHORS BY SELF COMBUSTION SYNTHESIS USED FOR WHITE LIGHT EMITTING DIODES. U. B. Gokhe1*, S. K. Omanwar 2 1. Department of Physics, B N Bandodkar college of science, Thane (MS), India 2. Department of Physics, SGB Amravati University, Amravati (MS) 444101, India *corresponding author : [email protected] Received on: 27/10/2014 Modified on : 23/12/14 Accepted on 16/01/2015 Abstract:- Alkaline earth orthosilicates SrMSiO4 (M= Ba, Ca, Mg, Li2) phosphors were synthesized through solution combustion method. Their crystal structures and luminescence properties were 2+ 3+ 2+ 2+ 2+ + investigated. One of the Sr of Sr2SiO4:Eu was substituted by Ba , Ca , Mg and 2Li . The photoluminescence (PL) of all he samples shows broad-band absorption and the strongest 7 5 excitation peak at 393 nm contributed to the F0→ L6 transition which matches well with the emission of a UV chip. The PL shows emission spectrum with the peaks at 580, 592 and 614 nm, 5 7 3+ were probably attributed to the transitions from D0 to FJ (J=0, 1, 2) of Eu ions. Two emission bands peaked around 589 and 614 nm are of different intensities in different cation substitutions. Changing of the crystal field strength and covalence in the host lattice together were assigned for the tuning effect. With an overview of the excitation at 393 nm and the emission spectra in orange-red color, these doped phosphors can become promising phosphor candidates for white light emitting diodes. Keywords: photoluminescence, crystal field, covalence. Introduction incandescent and discharge column type White light emitting diodes (WLEDs) have fluorescent lamps, due to high efficiency, the potential of replacing the conventional long lifetime, full solid state lamp; they are 1 JBNB Volume 3 2015 Available online www.vpmthane.org J BNB 3+ friendly to environment etc (Zhang et Y2O2S:Eu red phosphor is inadequate al.,2006) . The first and traditional WLED under near-UV irradiation due to its has been used with an InGaN blue LED instability. Accordingly, it is an attractive (460-480 nm) and yellow YAG: Ce3+ and challenging research task to develop phosphors to produce white light (Yum et novel, stable red phosphors that can be al., 2003). WLED with this pattern has low excited effectively by the near UV. color rendering for lack of red color. To Silicates are of great interest owing to overcome these disadvantages, the white their outstanding thermal, chemical, and LEDs based on red, green, and blue primary mechanical stability and structural diversity. colors have been studied. WLEDs can be Very recently, silicates have been achieved by combining red, green, and blue extensively studied as the satisfactory host LEDs, coating green and red phosphors onto lattices for phosphors, which exhibit a blue LED (Guo et al., 2010). unusual, interesting luminescence properties Efficient red-emitting phosphors are when activated by rare earths. There are necessary for both of the methods. In the more reports about silicate phosphors, but current tricolor phosphors of the near- less research about red phosphors based on 3+ UV InGaN-LED chips, Y2O2S:Eu for red, silicates excited by near UV, therefore, it is 2+ Zn2SiO4:Mn for green, and very important to develop such appropriate 2+ 3+ BaMgAl10O17:Eu for blue are generally red phosphors. Eu is a preferable choice as used (Chou et al., 2005). Unfortunately, the an activator ion with red emission via the 5 7 5 7 use of a phosphor mixture containing a large D0→ F1 and D0→ F2 transitions, which amount of red phosphors is required for has been used in most commercial red sufficient color rendering because the phosphors (Yang et al., 2010). Recent years, photoluminescence (PL) intensity of the red phosphors such as M2SiO4 (Ca, Sr, Ba) 3+ Y2O2S:Eu red phosphor is lower than that have been reported (Hong He Et al., 2009). of the green and blue phosphors (Guo et al., 2008). Furthermore, the lifetime of the 2 JBNB Volume 3 2015 Available online www.vpmthane.org J BNB On the basis of the above reasons, in in furnace at 7000 C. The combustion takes this work, a novel Orange-red phosphor place within 5 minutes. The samples were 3+ SrMSiO4:Eu (M=Ba, Ca, Mg, Li2) were crushed and heated for 2 hours in open air at synthesized solution combustion method, 800oC and quenched at room temperature. and the luminescence properties were All samples were characterized by X- investigated. The technique of combustion ray powder diffraction (XRD). The XRD synthesis is used to synthesize phosphors at measurements were performed on a Bruke low temperatures with high chemical /D8-Advance with Cu Kα radiation homogeneity and high purity (Kingsley et (λ=0.1518 nm).
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