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Search Results: 1 - 10 of 699 matches for " Anuradha Varshney "
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Synthesis, Kinetics and Mechanism of Terpolymerization of Styrene, Vinyl Acetate with Acrylonitrile Initiated by P-Nitrobenzyl Triphenyl Phosphonium Ylide  [PDF]
Kiran Prajapati, Anuradha Varshney
International Journal of Organic Chemistry (IJOC) , 2011, DOI: 10.4236/ijoc.2011.12010
Abstract: Synthesis of terpolymers consisting of two electron-donating monomers, viz. styrene and vinyl acetate with one electron-accepting monomer, i.e. acrylonitrile, initiated by p-nitrobenzyl triphenyl phosphonim ylide in dioxane as diluent at 65°C for 150 min has been studied. The kinetic expression is Rpα[I]0.8[Sty] 1.2[VA] 1.4 [AN]1.2. The terpolymer composition was determined by the Kelen-Tüdos method. The values of reactivity ratios using r1 (Sty + VA) = 0.1 and r2 (AN) = 0.005. The overall activation energy is 46 kJ●mol●L–1. The formation of terpolymer is confirmed by the FTIR spectra showing bands at 3030 cm–1, 1598 cm–1, and 2362 cm–1, confirming the presence of phenyl, acetoxy and nitrile group respectively. The terpolymer has been characterized by 1H-Nuclear Magnetic Resonance, 13C-Nuclear Magnetic Resonance. The Differential Scanning Calorimetric curve shows the Tg of the polymer as 149.5°C. A scanning electron microscope confirms the polymer to be phosphorus free. Electron.Spin.Resonance spectra confirms phenyl radical responsible for initiation.
Thermal Characteristics of Oxazolidone Modified Epoxy Anhydride Blends
Anuradha Varshney,Rashmi Mohan Mathur,Kiran Prajapati
International Journal of Chemistry , 2012, DOI: 10.5539/ijc.v4n3p113
Abstract: Oxazolidone modified epoxy resin blends can be prepared with dianhydrides to form thermosets with higher thermal stability. Curing the oxazolidone modified resin is an addition reaction, which offers better thermal properties and improved chemical resistance. Chemical reactions that take place during cure, determine resin morphology and properties of cured thermosets. Such epoxy resin systems are used for various reinforcements because they offer significant advantage over metals in area of weight saving and corrosion resistance and for use in glass fabric reinforced flame retardants.
Mesolamellar composite of TiN and CTAB using fluoride ion bridge: synthesis, mechanism & characterization  [PDF]
Tumbavanam Venkateswaran Anuradha
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.25057
Abstract: In an attempt to synthesize hexagonal mesopo- rous titanium nitride, a mesolamellar composite based on titanium nitride and cetyltrimethylam- monium bromide (CTAB) is obtained by the sol-gel route involving templating at 80oC. The mechanism underlying the above synthesis is discussed for the first time in the literature and till date there are no reports on the synthesis of mesoporous nitrides. The above mesolamellar composite is found to form an oxide of titania (anatase) upon heat treatment at 335oC for 1h.
Change in Mass of Spinning Black Holes w.r.t. the Angular Momentum  [PDF]
Dipo Mahto, Anuradha Kumari
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.95065
Abstract: Mahto et al. have shown δS≥0 and M2=a*J by using the first law of the black hole mechanics in the vacuum and Einstein mass-energy equivalence relation specially for spinning black holes. In the present paper, this work is extended to propose a model for the change in mass of the spinning black holes due to corresponding change in the angular momentum for maximum & half spin parameter of black holes (a* = 1 & 1/2) and calculated their values for different test black holes in XRBs and AGN. We have also shown that the change in mass of the spinning black holes due to corresponding change in the angular momentum for maximum spinning rate of black holes (a* = 1) is double to that of the spinning black holes having spinning parameter (a* = 1/2).
Change in Entropy of Spinning Black Holes Due to Corresponding Change in Mass in XRBs  [PDF]
Dipo Mahto, Anuradha Kumari
International Journal of Astronomy and Astrophysics (IJAA) , 2018, DOI: 10.4236/ijaa.2018.82012
Abstract: The present paper gives a theoretical model for the change in entropy of spinning black holes due to change in mass to use the first law of black hole mechanics for unit spinning parameter and angular momentum in XRBs. This shows that the entropy change with respect to the mass of uncharged spinning black holes is essentially the function of mass and their surface gravity are lesser than to that of the non-spinning black holes.
Effect of plant extracts on Drechslera graminea, the causal agent of stripe disease of barley
Indian Phytopathology , 2012,
Abstract: Effect of leaf extracts of Azadirachta indica, Lantana camara, Pinus roxburghii and Tagetes erecta along with water soluble fraction of mustard oil cake on germination, growth of mycelium, sporulation of Drechslera graminea and incidence of stripe disease of barley was
High Temperature Electrical Characterization of Single Crystal of N-Type CDSE Optimally Annealed in a molten CD
Pankaj Varshney
International Journal of Soft Computing & Engineering , 2012,
Abstract: In this paper high quality single crystal of n-type CDSE is grown from the vapor phase by the piper polich method. X-ray laue photographs from different directions are taken. DC galvanomagnetic properties are measured and analyzed in the temperature range 75 to 450 K in an undoped single crystal of n-type CDSE, which was optimally annealed in high purity molten CD at 850 0C for a period of ~ 400 h. α- the polaron coupling constant is estimated from the measured Hall mobility (μH) data at low and intermediate temperature by identifying a temperature region, wherein only the polar optical phonon scattering operates in the conduction band. The deformation potential Eb in the conduction band of CDSE is obtained from the measured μH data in the temperature region wherein the deformation potential also operates effectively. It is shown that a change in the microscopic mobility through photo excitation indicate a change in scattering.
Impact of Water Resources Protection on Local Ground Water Market  [PDF]
Baskaran Anuradha, Neelakanda Kannaperumal Ambujam
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.28083
Abstract: Tanks are important means to conserve water resources in semi-arid areas. Tank irrigation in general, and in Tamil Nadu in particular, has a long history, and it can be traced to prehistoric times. Poor management of the integrated tank system including its structures and distribution system is one of the major reasons for decline of tank irrigated area. Rehabilitating tanks enhanced groundwater recharge leads to increased water table in the wells located in the command area. Hence well owning farmers can able to cultivate three times paddy crop in a year with the available ground water. Also they can provide water for adjacent non-well owning farmers for their second crop (during maturity stage) and third crop (whole season) cultivation by charging either cash or kind. This local ground water market helps villagers to cultivate more area and season, leads to efficient water use and increased income generation for the villagers. To prove the above statement a study was carried out in rural village of South India with an interview schedule and the data were analysed using SPSS (Statistical Package for Social Science). The result shows that the tank rehabilitation is highly correlated with local ground water market in post rehabilitation period.
Ring Opening of Epoxy Fatty Esters by Nucleophile to Form the Derivatives of Substituted β-Amino Alcohol  [PDF]
Himani Varshney, Aiman Ahmad, Abdul Rauf
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.49A1004

The nucleophilic ring opening of epoxy fatty esters was carried out using the amino-1,2,4-triazole to yield substituted derivatives of β-amino alcohol. The synthesis of the substituted beta amino alcohols has been achieved by refluxing equimolar quantities of long chain epoxy esters (epoxy fatty esters) and 4-amino-1,2,4-triazole in dichloromethane to yield following compounds, methyl 10-(4'-amino-1',2',4'-triazole)-11-hydroxy undecanoate (V), methyl 9-(4'-amino-1', 2',4'-triazole)-10-hydroxy octadecanoate (VI), methyl 9-(4'-amino-1',2',4'-triazole)-10,12-dihydroxy octadecanoate (VII), methyl 12-(4'-amino-1',2',4'-triazole)-9,13-dihydroxy octadecanoate (VIII). Epoxides of esters of fatty acids were obtained by reaction of esters of fatty acids with mchloroperbenzoic acid. All the newly synthesized compounds were characterized by IR, 1H NMR, 13C NMR and mass spectrometry.

Golden Research Thoughts , 2013, DOI: 10.9780/22315063
Abstract: India perhaps has the highest retail density in the world. Economies of scale drive the retail sector towards rapid growth in terms of size of outlets and dominance in geographical and product markets, posing challenges for preservation of genuine competition.The winds of globalization sweeping across has taken the Indian economic environment in its fold and the proposals for further integration has gained momentum, The transformation has also changed the Indian consumer from a state of conserving resources, he's now ready to accept the shopping culture. The government encouraged by the outcome of economic policy of 1991 in India, has proposed retail reforms mainly as 100% FDI in the retail sector in India. It may benefit by bringing in investment into development of complete backend infrastructure like cold chain & supply chain enhancing efficiency from farm to fork, as well as eliminating the exploitative system of middlemen which bleeds the farmers and squeezes the consumers. The paper scrutinizes the impact and analysis of Foreign Direct Investments with the Indian Retail Sector. However, the Indian government must take decision to contain this revolution & safeguard the health of the Indian retail sector to stabilize themselves against competition from the giant players of the global economy in the present state of slowing growth, stubborn inflation & widening fiscal deficit in the country. The government of India has revised its policy regarding foreign direct investment (“FDI”) in Indian companies engaged in retail trade. Effective as of January 10, 2012, foreign investors will now be permitted, subject to certain conditions, to own up to 100 percent of singlebrand retail trading companies in India.
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