Qualification: 
Ph.D, MSc
Email: 
s_akanksha@blr.amrita.edu

Dr. Akanksha Saxena Pandit currently serves as Assistant Professor(Sr. Gr.) at department of Chemistry, Amrita School of Engineering, Banglore campus.

Publications

Publication Type: Journal Article

Year of Publication Publication Type Title

2016

Journal Article

Dr. S. Giridhar Reddy, Dr. Akanksha Saxena Pandit, and Dr. Amrita Thakur, “Effects of crosslink agents on sodium alginate and lignosulphonic acid blends”, Polymer (Korea), vol. 40, pp. 63-69, 2016.[Abstract]


Blends of sodium alginate (SA) and lignosulphonic acid (LS) has been prepared in the ratio of 80/20. The prepared blends were crosslinked using chlorides of calcium, barium, strontium and aluminum. The crosslinking of blends was done for different time intervals and then these blends were subjected for swelling studies in aqueous medium of pH 7.4. The observations indicate that the crosslinking is diffusion controlled and is affected by the size of metal ion and the type of alginate used. The improved swelling time for crosslinked blends in aqueous medium supports the fact that the stability under physiological conditions of the blends is improved due to crosslinking with the metal ions. Calcium chloride and barium chloride forms strong crosslink with the blend. Calcium ion crosslinked blends can be considered suitable for biomedical drug applications. The investigations on crosslinked blends using FTIR, SEM, XRD and EDAX are in close agreement with swelling results. © 2016 The Polymer Society of Korea. All rights reserved.

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2016

Journal Article

Dr. Akanksha Saxena Pandit, Rajvanshi, A., and Mathur, V. B., “Progressive Trends in the Uptake of SEA in South Asia”, Journal of Environmental Assessment Policy and Management, vol. 18, p. 1650018, 2016.[Abstract]


Striking a balance between the need to achieve socio-economic growth and to conserve and sustainably use natural resources has become a pressing requirement globally, especially in developing nations. Strategic environmental assessment (SEA) that recognises and integrates environmental, social and economic considerations into policies, plans and programmes is a recognised and effective planning tool in more than 90 countries across the globe. The paper reflects on changing trends in SEA uptake and increasing momentum for its application in South Asia. Evidence suggests that various drivers including voluntary practice and donor driven impact assessments are favouring the uptake of SEA as a robust and futuristic planning support tool for sustainable growth in multiple economic sectors.The paper draws on numerous examples of SEA and ‘SEA-like’ instruments applied in different sectors in South Asia and identifies growth sectors where SEA has a significant potential to synchronise conservation and sustainable development objectives. More »»

2016

Journal Article

Dr. Akanksha Saxena Pandit, Fijalkow, I., and A. Swindlehurst, L., “Analysis of One-Bit Quantized Precoding for the Multiuser Massive MIMO Downlink”, CoRR, vol. abs/1610.06659, 2016.[Abstract]


We present a mathematical analysis of linear precoders for downlink massive MIMO multiuser systems that employ one-bit digital-to-analog converters at the basestation in order to reduce complexity and mitigate power usage. The analysis is based on the Bussgang theorem, and applies generally to any linear precoding scheme. We examine in detail the special case of the quantized zero-forcing (ZF) precoder, and derive a simple asymptotic expression for the resulting symbol error rate at each terminal. Our analysis illustrates that the performance of the quantized ZF precoder depends primarily on the ratio of the number of antennas to the number of users, and our simulations show that it can outperform the much more complicated maximum likelihood encoder for low-to-moderate signal to noise ratios, where massive MIMO systems are presumed to operate. We also use the Bussgang theorem to derive a new linear precoder optimized for the case of one-bit quantization, and illustrate its improved performance. More »»

2016

Journal Article

G. A. Khan, War, J. A., Kumar, A., Sheikh, I. A., Dr. Akanksha Saxena Pandit, and Das, R., “A facile synthesis of novel indole derivatives as potential antitubercular agents”, Journal of Taibah University for Science, p. -, 2016.[Abstract]


Abstract A novel series of 5,5-dimethyl-11-phenyl-4b,5,5a,10,10a,11,11a,12-octahydro-10,11,12-triaza-indeno[2,1-b]fluorenes 3a–3l were prepared by reacting oxindole, aryl amines and acetone using dibutylamine as an organocatalyst via simultaneous Knoevenagel and Michael-type reactions. This preparation is environmentally benign, highly compatible and conveniently carried out in ethanol under mild conditions. The structures of the new compounds were determined by spectroscopic techniques, including IR, 1H NMR, 13C \{NMR\} and LCHRMS. Docking studies against an enoyl acyl carrier protein reductase predicted that the compounds possessed high binding affinity towards target molecules. The compound 3k (MIC, 40 μg/mL) showed comparable activity with Isoniazid at the same concentrations against \{MT\} \{H37\} Rv. More »»

2016

Journal Article

S. Wankar, Dr. Akanksha Saxena Pandit, Pandit, U. J., Khan, I., Das, R., and Limaye, S. N., “Synthesis and characterization of luminescent indole-based europium complex for selective sensing of ATP”, Journal of Biomolecular Structure and Dynamics, pp. 1-6, 2016.

2016

Journal Article

B. Habib, Rajvanshi, A., Mathur, V. B., and Dr. Akanksha Saxena Pandit, “Corridors at Crossroads: Linear Development-Induced Ecological Triage As a Conservation Opportunity”, Frontiers in Ecology and Evolution, vol. 4, p. 132, 2016.[Abstract]


The transportation infrastructure of a nation forms the backbone of its economic growth and social development, and, as a developing country, India is no exception. However, with imperatives to improve connectivity for economic and social growth, ecological costs are often at stake. Roads, old and new, cut through protected forests and connecting habitats, resulting in a plethora of ecological effects. These may include the severing of natural corridors thereby compromising the role of landscapes as conservation units especially for landscape-dependent wild animal species. Consequent loss of biodiversity and ecosystems and decline in innumerable ecosystem services emanating from these natural reserves are other serious impacts. As India aspires for better, modern roads, the ecological concerns regarding many road upgradation projects have recently been the cause of disputes between the transportation sector and the conservation community. Delayed consideration of ecological concerns into linear development project planning leads to inadequate appropriation of funds needed for mitigating impacts of such developments. It is in these circumstances that the question of prioritizing areas and strategies for mitigation given limited mitigation funds arises. We examine the different facets to the debate of triage vis-à-vis conservation, development and mitigation planning in the transportation sector in a developing country context. We suggest that it is important and possible to secure investment towards conservation in areas outside the purview of legal protection through project mitigation costs and other mechanisms. We also make suggestions to avoid the ‘laissez-faire’ approach to linear development projects that is prevalent in India. More »»

2016

Journal Article

G. S Reddy, Dr. Akanksha Saxena Pandit, Thakur, A., and , “가교제가 Sodium Alginate 와 Lignosulphonic Acid 의 블렌드에 미치는 영향”, Polymer (Korea), vol. 40, pp. 63–69, 2016.[Abstract]


Blends of sodium alginate (SA) and lignosulphonic acid (LS) has been prepared in the ratio of 80/20. The prepared blends were crosslinked using chlorides of calcium, barium, strontium and aluminum. The crosslinking of blends was done for different time intervals and then these blends were subjected for swelling studies in aqueous medium of pH 7.4. The observations indicate that the crosslinking is diffusion controlled and is affected by the size of metal ion and the type of alginate used. The improved swelling time for crosslinked blends in aqueous medium supports the fact that the stability under physiological conditions of the blends is improved due to crosslinking with the metal ions. Calcium chloride and barium chloride forms strong crosslink with the blend. Calcium ion crosslinked blends can be considered suitable for biomedical drug applications. The investigations on crosslinked blends using FTIR, SEM, XRD and EDAX are in close agreement with swelling results. More »»

2016

Journal Article

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Mass Transfer Characteristics of Sodium alginate (SA) and Lignosulphonic acid (LS) Blends”, An International Research Journal of Pure and Applied Chemistry, vol. 32, no. 5, 2016.[Abstract]


Diffusion and sorption of Biodegradable blends of sodium alginate (SA) and lignosulphonic acid (LS) has been studied at room temperature by conventional weight gain experiments. The sorption studies of SA/LS blends are carried in pH medium of 7.4. The sorption data are used to evaluate the mass transfer coefficients such as intrinsic diffusion coefficient and permeation coefficient. It was observed that the blends follow Fickian mode of transport where polymer chain relaxation is more than diffusion of solvent. More »»

2014

Journal Article

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Controlled drug delivery studies of biological macromolecules: Sodium alginate and lignosulphonic acid films”, Journal of Applied Polymer Science, vol. 131, 2014.[Abstract]


The ciprofloxacin (CPX)-loaded blends made of sodium alginate and lignosulfonic acid (LS) were prepared by solution casting method in the ratio of 80/20. The blends were crosslinked for different intervals of time to control the drug release. The drug release was investigated for 24 hours in different pH medium (1, 4, 7, and 9). It was confirmed that drug release is controlled by diffusion through the polymer matrix followed by the erosion of the polymer. The pH of the surrounding medium influences the drug solubility, swelling, and degradation rate of the polymer and therefore the overall drug release process. The blend shows minimal drug release at pH 1 and 9, whereas moderate release at pH 4, but rapid release at pH 7. Further FTIR, XRD, and SEM characterization are carried, to confirm the chemical-interaction, crystallization effects, and compatibility between the blend matrixes. Copyright © 2014 Wiley Periodicals, Inc. More »»

2013

Journal Article

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Effect of Curing Agent on Sodium Alginate Blends Using Barium Chloride as Crosslinking Agent and Study of Swelling, Thermal, and Morphological Properties”, International Journal of Polymeric Materials and Polymeric Biomaterials, vol. 62, pp. 743-748, 2013.[Abstract]


Sodium alginate and lignosulfonic acid blends were prepared in various ratios (100/0, 80/20, and 60/40), in order to test the suitability of these blends for controlled drug delivery in variable pH medium using barium chloride as crosslinking agent. The blends were characterized by TGA and DSC, in order to study thermal degradation properties and glass transition temperature. Thermal analyses of blends were found to be degrading in multiple steps compared to their pure polymers. Crystallization characteristics are investigated using the DSC curves. Further, miscibility of blends was investigated for morphological studies by SEM. More »»

2013

Journal Article

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Biodegradable sodium alginate and lignosulphonic acid blends: characterization and swelling studies”, Pol{ímeros, vol. 23, pp. 13–18, 2013.[Abstract]


In this article, Sodium alginate and Lignosulphonic acid blends were prepared in different weight ratios by solution casting method. Swelling experiments were conducted for Sodium alginate and its blends by adding calcium chloride for various intervals in a pH 7.4 medium. The strength of the films increases after their treatment with CaCl2 at higher intervals forming an alginate network. The SA/LS blend (80/20) is subjected for sorption studies at variable pH 1.2 & 7.4, in order to test the suitability of the blends for controlled drug delivery. Further, experiments were conducted for de-crosslinking using 0.1M HCl. The solvent uptake for the blends decreased with increasing LS content in the blends. Blends were investigated by X-ray diffraction and Fourier Transform Infra-Red spectroscopy in order to study the crystallinity and molecular interactions. XRD confirms the reduction in cluster space in blends leading to lower uptake of solvent.

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2011

Journal Article

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Swelling behavior of calcium-ions crosslinked bipolymeric sodium alginate-lignosulphonic acid blends”, International Journal of Polymeric Materials and Polymeric Biomaterials, vol. 60, pp. 1123-1129, 2011.[Abstract]


A series of blends based on lignosulfonic acid (LSA) and sodium alginate (NaAlg) were prepared with varying proportions of NaAlg and LSA using a solution-casting method. The swelling /degradation behavior of blends was studied so that they can be used for gastrointestinal drug delivery. Effect of crosslinking, pH, alginate content, and treatment with strong acid on swelling properties of the blends was investigated. It was found that blends show pH-sensitive swelling and show less water uptake due to crosslinking, while crosslinking is reduced in the presence of strong acid. Thus these blends offer their strong candidature for possible use in drug delivery. Copyright © Taylor & Francis Group, LLC. More »»

2011

Journal Article

Dr. Akanksha Saxena Pandit, “Arresting the Accidental Discharge of Nuclear Wastes by Modeling the Fuel and Clad”, Energy Procedia, vol. 7, pp. 512 - 517, 2011.[Abstract]


The paper deals with the method employed to arrest the temperature of vertical nuclear fuel-clad so as to keep clad fairly below the softening temperature. Objective of the paper is to control the generation of solid, liquid and gaseous nuclear waste as a result of split or rupture in clad. The fuel and clad have been modeled. The governing equations with adequate boundary conditions were solved using marching technique. The computer program was developed to predict the rewetting velocity. The paper mainly covers the generation of rewetting transients which were used to predict the rewetting velocities. Method of calculating acceptable rate of rise of clad temperature such that complete clad is saved from attaining softening temperature is discussed in detail in the paper. More »»

2008

Journal Article

Dr. Akanksha Saxena Pandit, Sharma, U. L., and Rao, V. G., “Code RAMM for rewetting velocity on vertical nuclear fuel clad”, Indian Chemical Engineer, vol. 50, pp. 205–213, 2008.[Abstract]


Computer code RAMM was developed for studying the rewetting behaviour of the vertical clad of nuclear fuel under bottom flooding conditions and was validated using experimental results. The code was applied to predict the rate of rise of temperature of clad after LOCA for a typical nuclear research reactor. The predicted value is in close agreement with the value available in literature. Since the code is general it has wide range of applications. More »»

2007

Journal Article

Dr. Akanksha Saxena Pandit, Francis, B., V. Rao, L., and Ninan, K. N., “Toughening of an epoxy resin with hydroxy-terminated poly(arylene ether nitrile) with pendent tertiary butyl groups”, Journal of Applied Polymer Science, vol. 106, pp. 1318–1331, 2007.[Abstract]


Hydroxy-terminated poly(arylene ether nitrile) oligomers with pendent tert-butyl groups (PENTOH) were synthesized by the nucleophilic aromatic substitution reaction of 2,6-dichlorobenzonitrile with tert-butyl hydroquinone in N-methyl-2-pyrrolidone medium with anhydrous potassium carbonate as a catalyst at 200°C in a nitrogen atmosphere. The PENTOH oligomers were blended with diglycidyl ether of bisphenol A epoxy resin and cured with 4,4′-diaminodiphenyl sulfone. The curing reaction was monitored with infrared spectroscopy and differential scanning calorimetry. The morphology, fracture toughness, and thermomechanical properties of the blends were investigated. The scanning electron micrographs revealed a two-phase morphology with a particulate structure of the PENTOH phase dispersed in the epoxy matrix, except for the epoxy resin modified with PENTOH with a number-average molecular weight of approximately 4000. The storage modulus of the blends was higher than that of the neat epoxy resin. The crosslink density calculated from the storage modulus in the rubbery plateau region decreased with an increase in PENTOH in the blends. The fracture toughness increased more than twofold with the addition of PENTOH oligomers. The tensile strength of the blends increased marginally, whereas the flexural strength decreased marginally. The dispersed PENTOH initiated several toughening mechanisms, which improved the fracture toughness of the blends. The thermal stability of the epoxy resin was not affected by the addition of PENTOH to the epoxy resin. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007 More »»

2006

Journal Article

Dr. Akanksha Saxena Pandit, Francis, B., V. Rao, L., and Ninan, K. N., “Epoxy-tert-butyl poly(cyanoarylene ether) blends: Phase morphology, fracture toughness, and mechanical properties”, Journal of Applied Polymer Science, vol. 100, pp. 3536–3544, 2006.[Abstract]


Tert-butyl hydroquinone–based poly(cyanoarylene ether) (PENT) was synthesized by the nucleophilic aromatic substitution reaction of 2,6-dichlorobenzonitrile with tert-butyl hydroquinone using N-methyl-2-pyrrolidone (NMP) as solvent in the presence of anhydrous potassium carbonate in a nitrogen atmosphere at 200°C. PENT-toughened diglycidyl ether of bisphenol A epoxy resin (DGEBA) was developed using 4,4′-diaminodiphenyl sulfone (DDS) as the curing agent. Scanning electron micrographs revealed that all blends had a two-phase morphology. The morphology changed from dispersed PENT to a cocontinuous structure with an increase in PENT content in the blends from 5 to 15 phr. The viscoelastic properties of the blends were investigated using dynamic mechanical thermal analysis. The storage modulus of the blends was less than that of the unmodified resin, whereas the loss modulus of the blends was higher than that of the neat epoxy. The tensile strength of the blends improved slightly, whereas flexural strength remained the same as that of the unmodified resin. Fracture toughness was found to increase with an increase in PENT content in the blends. Toughening mechanisms like local plastic deformation of the matrix, crack path deflection, crack pinning, ductile tearing of thermoplastic, and particle bridging were evident from the scanning electron micrographs of failed specimens from the fracture toughness measurements. The thermal stability of the blends were comparable to that of the neat resin. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3536–3544, 2006. More »»

2006

Journal Article

Dr. Akanksha Saxena Pandit, Sadhana, R., V. Rao, L., Ravindran, P. V., and Ninan, K. N., “Synthesis and properties of poly ether nitrile sulfone copolymers with pendant methyl groups”, Journal of Applied Polymer Science, vol. 99, pp. 1303–1309, 2006.[Abstract]


Poly ether nitrile and poly ether nitrile sulfone copolymers with pendant methyl groups were prepared by the nucleophilic substitution reaction of 2,6′-dichlorobenzonitrile with methyl hydroquinone and with varying mole proportions of methyl hydroquinone and 4,4′dihydroxydiphenylsulfone using N-methyl pyrrolidone as solvent in the presence of anhydrous K2CO3. The polymers were characterized by different physicochemical techniques. Copolymer composition was determined using FTIR technique. Thermogravimetric data reveals that all the polymers were stable up to 420°C with a char yield above 40% at 900°C in N2 atmosphere. The glass transition temperature was found to increase and the activation energy and inherent viscosities were found to decrease with increase in concentration of the 4,4′-dihydroxydiphenylsulfone units in the polymer. Trimerization reactions are found to be favorable with increase in concentration of methyl hydroquinone units in the polymer. Crystallinity of the polymer was also studied using wide angle X-ray diffraction. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1303–1309, 2006. More »»

2005

Journal Article

Dr. Akanksha Saxena Pandit, Prabhakaran, P. V., V Rao, L., and Ninan, K. N., “Synthesis and characterization of polyamides and poly (amide-imide) s derived from 2, 6-bis (3-aminophenoxy) benzonitrile or 2, 6-bis (4-aminophenoxy) benzonitrile”, Polymer international, vol. 54, pp. 544–552, 2005.[Abstract]


A series of polyamides and poly(amide-imide)s was prepared by direct polycondensation of ether and nitrile group containing aromatic diamines with aromatic dicarboxylic acids and bis(carboxyphthalimide)s respectively in N-methyl 2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. New diamines, such as 2,6-bis(4-aminophenoxy)benzonitrile and 2,6-bis(3-aminophenoxy)benzonitrile, were prepared from 2,6-dichlorobenzonitrile with 4-aminophenol and 3-aminophenol, respectively, in NMP using potassium carbonate. Bis(carboxyphthalimide)s were prepared from the reaction of trimellitic anhydride with various aromatic diamines in N,N′-dimethyl formamide. The inherent viscosities of the resulting polymers were in the range of 0.27 to 0.93 dl g−1 in NMP and the glass transition temperatures were between 175 and 298 °C. All polymers were soluble in dipolar aprotic solvents such as dimethylsulfoxide, dimethylacetamide and NMP. All polymers were stable up to 350 °C with a char yield of above 40 % at 900 °C in nitrogen atmosphere. All polymers were found to be amorphous except the polyamide derived from isophthalic acid and the poly(amide-imide)s derived from diaminodiphenylether and diaminobenzophenone based bis(carboxyphthalimide)s. More »»

2005

Journal Article

Dr. Akanksha Saxena Pandit, Sadhana, R., V. Rao, L., Ravindran, P. V., and Ninan, K. N., “Synthesis and properties of poly(ether nitrile sulfone) copolymers with pendant methyl groups”, Journal of Applied Polymer Science, vol. 97, pp. 1987–1994, 2005.[Abstract]


Poly(ether nitrile) and poly(ether nitrile sulfone) copolymers with pendant methyl groups were prepared by the nucleophilic substitution reaction of 2,6′-dichlorobenzonitrile with methyl hydroquinone and with varying mole proportions of methyl hydroquinone and 4,4′-dihydroxydiphenylsulfone using N-methyl pyrrolidone as a solvent in the presence of anhydrous K2CO3. The polymers were characterized by different physicochemical techniques. Copolymer composition was determined using the FTIR technique. Thermogravimetric data revealed that all polymers were stable up to 420°C with a char yield above 40% at 900°C in a nitrogen atmosphere. The glass-transition temperature increased and the activation energy and inherent viscosities decreased with an increase in the concentration of the 4,4′-dihydroxydiphenylsulfone units in the polymer. Trimerization reactions were favorable with an increase in the concentration of methyl hydroquinone units in the polymer. The crystallinity of the polymer was also studied using wide-angle X-ray diffraction. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1987–1994, 2005 More »»

2004

Journal Article

V. L. Rao, Sabeena, P. U., Dr. Akanksha Saxena Pandit, Gopalakrishnan, C., Krishnan, K., Ravindran, P. V., and Ninan, K. N., “Synthesis and properties of poly(aryl ether ether ketone) copolymers with pendant methyl groups”, European Polymer Journal, vol. 40, pp. 2645 - 2651, 2004.[Abstract]


Polyether ether ketone and polyether ether ketone copolymers were prepared by the nucleophilic substitution reaction of 4,4′-difluorobenzophenone with hydroquinone and with varying mole proportions of hydroquinone and methyl hydroquinone using sulfolane solvent in the presence of anhydrous K2CO3. The polymers were characterised by different physico-chemical techniques. The crystallinity of the polymers was found to decrease with increase in concentration of the methyl hydroquinone units in the polymer. Thermogravimetric studies showed that all the polymers were stable upto 430 °C with a char yield above 49% at 900 °C in \{N2\} atmosphere. The glass transition temperature was found to increase and the crystalline melting temperature and activation energy were found to decrease with increase in concentration of the methyl hydroquinone units in the polymer. More »»

2004

Journal Article

Dr. Akanksha Saxena Pandit, Rao, V. L., Asari, G. V., and Ninan, K. N., “Synthesis and properties of polyarylene ether nitriles: Effect of structure of bisphenol on the properties of polyarylene ether nitriles”, Journal of Polymer Materials, vol. 21, pp. 343–350, 2004.

2003

Journal Article

Dr. Akanksha Saxena Pandit, Rao, V. L., and Ninan, K. N., “Synthesis and properties of polyether nitrile copolymers with pendant methyl groups”, European Polymer Journal, vol. 39, pp. 57 - 61, 2003.[Abstract]


Polyether nitrile and polyether nitrile copolymers with pendant methyl groups were prepared by the nucleophilic substitution reaction of 2,6′-dichlorobenzonitrile with hydroquinone (HQ) and with varying mole proportions of \{HQ\} and methyl hydroquinone (MeHQ) using N-methyl pyrrolidone solvent in the presence of anhydrous K2CO3. The polymers were characterised by different physico-chemical techniques. The crystallinity of the polymers was found to decrease with increase in concentration of the MeHQ units in the polymer. Thermogravimetric studies showed that all the polymers were stable up to 450 °C with a char yield above 50% at 900 °C in \{N2\} atmosphere. The glass transition temperature and activation energy of the polymers was found to increase with increase in concentration of the MeHQ units in the polymer. More »»

2003

Journal Article

Dr. Akanksha Saxena Pandit, Sadhana, R., Rao, V. L., Kanakavel, M., and Ninan, K. N., “Synthesis and Properties of Polyarylene ether Nitrile Copolymers”, Polymer Bulletin, vol. 50, pp. 219–226, 2003.[Abstract]


Polyether nitrile and its copolymers were synthesized by nucleophilic substitution reaction of 2,6-dichlorobenzonitrile with resorcinol and with varying mole proportions of resorcinol and hydroquinone. The polymers were characterized by different physico-chemical techniques. Thermogravimetric studies showed that all the polymers were stable up to 400°C with a char yield of above 48% at 900°C in N2 atmosphere. The glass transition temperature was found to increase with increase in concentration of hydroquinone units in the polymer; however no trend was observed in their crystalline melt temperatures. Copolymer composition was determined using FT-IR technique. Crystallinity of the polymers was also studied using wide angle X-ray diffraction. More »»

2003

Journal Article

Dr. Akanksha Saxena Pandit, Rao, V. L., Prabhakaran, P. V., and Ninan, K. N., “Synthesis and characterization of polyamides and poly(amide–imide)s derived from 2,2-bis(4-aminophenoxy) benzonitrile”, European Polymer Journal, vol. 39, pp. 401 - 405, 2003.[Abstract]


A series of polyamides and poly(amide–imide)s were prepared by the direct poly-condensation of 2,2-bis(4-aminophenoxy) benzonitrile [4-APBN] with aromatic dicarboxylic acids and bis(carboxyphthalimide)s in N-methyl-2-pyrrolidone [NMP] with triphenyl phosphite and pyridine as condensing agents. The synthesis of 4-APBN involves a nucleophilic displacement reaction in dipolar aprotic solvent with the alkali metal salt of p-aminophenol and an activated aromatic dichloro compound. Bis(carboxyphthalimide)s were prepared by condensation of 4,4′-diaminodiphenylsulfone, 3,3′-diaminodiphenylsulfone, 4,4′-diaminodiphenylether, 4,4′-diaminodiphenylmethane, 3,3′-diaminobenzophenone, and trimellitic anhydride at a 1:2 molar ratio. The inherent viscosities of the resulting polymers were found to be in the range of 0.31–0.93 dl/g and glass transition temperatures between 235 and 298 °C. All polymers were soluble in aprotic polar solvents such as dimethylsulfoxide and NMP. The results of thermogravimetry revealed that all the polymers showed no significant weight loss before 400 °C. Wide-angle X-ray diffractograms revealed that all polymers were found to be amorphous except for the polyamide derived from isophthalic acid and polyamide–imides derived from diaminodiphenylether and diaminobenzophenone based bis(carboxyphthalimide)s. More »»

2002

Journal Article

L. V. Rao, Dr. Akanksha Saxena Pandit, and Ninan, K. N., “POLY(ARYLENE ETHER NITRILES)”, Journal of Macromolecular Science, Part C, vol. 42, pp. 513-540, 2002.[Abstract]


Polyaryl ethers are a well known class of engineering thermoplastics. The aromatic portion of the poly (arylene ether) is believed to contribute to thermal stability and good mechanical properties of the polymer and the ether linkages are considered to facilitate polymer processing while maintaining oxidative and thermal stability. Many kinds of poly (arylene ethers) have been prepared via nucleophilic aromatic substitution polymerization,[1–3] and sulfone-containing poly (arylene ethers) such as UdelTM (Amoco) or ketone functional More »»

2001

Journal Article

Dr. Akanksha Saxena Pandit, V. Raj, V., and V. Rao, G., “Experimental studies on rewetting of hot vertical annular channel”, Nuclear Engineering and Design, vol. 208, pp. 283 - 303, 2001.[Abstract]


Studies on the rewetting behaviour of hot vertical annular channels are of interest in the context of emergency core cooling in nuclear reactors following LOCA. Experimental studies were carried out to study the rewetting behaviour of a hot vertical annular channel, with hot inner tube, for bottom flooding and top flow rewetting conditions. The length of the inner tube of the test section was 3030 mm for bottom flooding rewetting experiments and 2630 mm for top flow rewetting experiments. The tube was made of stainless steel. Experiments were conducted for water flow rates in the annulus upto 7 lpm (11.7×10−5 m3 s−1). The initial surface temperature of the inner tube was varied from 200 to 500°C. The experimental studies show that for a given initial surface temperature of the tube, the rewetting velocity increases with an increase in flow rate of water and it decreases with an increase in the initial surface temperature for a given water flow rate. For a given water flow rate and initial surface temperature, the rewetting velocity is higher in the case of rewetting under bottom flooding conditions as compared to that in the case of rewetting under top flow conditions. These conclusions agree with the conclusions reported in the earlier literature. Using the experimental data of the present work, correlations for bottom flooding and top flow rewetting velocities are developed. More »»

2001

Journal Article

Dr. Akanksha Saxena Pandit, “Uranium from seawater: a new resource for meeting future demands of Nuclear reactors”, INDIAN CHEMICAL ENGINEER, vol. 43, pp. 231–235, 2001.

2001

Journal Article

Dr. Akanksha Saxena Pandit, V Raj, V., and V Rao, G., “Malgouyres, PP, see Ducros, G. 208 (2001) 191 Malofeev, V., see Diamond, DJ 208 (2001) 181”, Nuclear Engineering and Design, vol. 208, pp. 321–322, 2001.

Publication Type: Conference Paper

Year of Publication Publication Type Title

2016

Conference Paper

Dr. Akanksha Saxena Pandit, Fijalkow, I., and Swindlehurst, A. L., “On one-bit quantized ZF precoding for the multiuser massive MIMO downlink”, in 2016 IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), 2016.[Abstract]


We study low complexity precoding for a downlink massive MIMO multiuser system assuming a base station that employs one-bit digital-to-analog converters (DACs) in order to mitigate power usage. The use of one-bit DACs is equivalent to constraining the transmit signal to be drawn from a QPSK alphabet. While the precoding problem can be formulated using a standard maximum likelihood (ML) encoder, the implementation cost is prohibitive for massive numbers of antennas, even if a sphere encoding approach is used. Instead, we study the performance of a one-bit quantized zero-forcing precoder, and we show that it asymptotically provides the desired downlink vector with low complexity. Simulations show that the quantized ZF precoder can actually outperform the ML encoder for low to moderate signal-to-noise ratios. More »»

2016

Conference Paper

Dr. Akanksha Saxena Pandit, Goyal, S., and Kshetrimayum, R. S., “Approximate analysis of MIMO based cooperative communication in ?? - ?? channel distribution”, in 2016 8th International Conference on Communication Systems and Networks (COMSNETS), 2016.[Abstract]


In the present work we have analysed the performance of a dual hop cooperative communication system. Multiple relays are taken for DF (Decode and Forward) relaying of signal from source to the destination over i.i.d. α - μ generalized fading channel distribution. Multiple antennas are realized at all the receive and transmit nodes on the source, relay and destination with Orthogonal Space Time Block Coding (OSTBC) implementation. Theoretical approximation for Symbol Error Rate (SER) performance is evaluated for Binary Phase Shift Keying (BPSK) and 4-Quadrature Amplitude Modulation (4-QAM) schemes as a function of Signal to Noise Ratio (SNR) using the Moment Generating Function (MGF) of the channel distribution. The variation of performance with number of relays used is studied. Monte Carlo simulation is used for verification of the analytical expression obtained. More »»

2014

Conference Paper

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Compatibility and Control Release Studies of Sodium Alginate (SA)/ Lignosulphonic acid (LS) Blends using Ciprofloxacin as model drug”, in International conference on functional materials ICFM- 2014, 2014.

2013

Conference Paper

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “DRUG DELIVERY STUDIES OF SODIUM ALGINATE AND LIGNOSULPHONIC ACID BLENDS”, in International conference on Polymers on the Frontiers of Science & Technology, Under the auspices of APA 2013 (Asian Polymer Association), 2013.

2012

Conference Paper

G. S. Reddy and Dr. Akanksha Saxena Pandit, “The effect of sodium alginate addition on the morphology and thermal properties of Sodium Alginate and Lignosulphonic acid Blends”, in IMPC 2012 (International Multicomponent Polymer Conference), 2012.

2011

Conference Paper

Dr. Akanksha Saxena Pandit and Limaye, S. P., “Method to stop severe accident in nuclear reactors”, in Fourth national conference on nuclear reactor technology: emerging trends in nuclear safety, 2011.[Abstract]


'Prevent Problems Before they occur' a concept which is easy to understand but difficult to practicise when it applies particularly to nuclear reactors where managing severe accident is an uphill task. Understanding the mechanism of occurrence of split or rupture in clad is still a challenge. Simultaneous occurrence of split or rupture in number of channels easily leads to severe accident. The paper presents a method not to manage severe accidents but to prevent the same to occur in nuclear reactors based on deterministic approach. A computer program is developed with consideration of complex thermal hydraulics and severe accident phenomenon to ascertain the minimum flow rate of coolant above which there are practically no chance of any split or rupture to occur. The results of program are in close agreement with authors own experimental data and the data available by various other researchers and are discussed at length in the paper. An important objective is to pinpoint the location of the likely split or rupture in clad subsequent to LOCA. In-depth study of severe accident is made by considering the clad alone and filled with fuel separately. More »»

2010

Conference Paper

Dr. Akanksha Saxena Pandit, Limaye, S. P., and Bhaumik, P. K., “Severe accident management”, in 2010 2nd International Conference on Reliability, Safety and Hazard - Risk-Based Technologies and Physics-of-Failure Methods (ICRESH), 2010.[Abstract]


Complex thermal-hydraulic and severe accident phenomenon is selected during Severe Accident Management. Deterministic approach is considered while assessing the consequences by severe accident due to Loss of Coolant Accident (LOCA) in vertical nuclear fuel channel. Mitigatory or Severe Accident Management has been used to arrest the temperature of clad such that it remains fairly below its softening limit. Method for establishment of minimum coolant flow through a nuclear fuel channel subsequent to LOCA is discussed in the paper. Concept of rewetting provides dependable foundation to Accident Management and is convenient in achieving the transient thermal analysis of clad. The results of analysis were found in close agreement with authors own experimental data and the data available by various other researchers. One of the important objectives of Accident Management is to control the generation of even a small size opening in clad subsequent to LOCA. In-depth study of severe accident is made by considering the clad filled with fuel and clad alone separately. In addition the paper brings out the accident management aspects with selected literature survey on Severe Accident Management. More »»

2010

Conference Paper

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Crystallization and Swelling of Novel Biodegradable polymer: Sodium alginate and Lignosulphonic acid”, in PROCEEDINGS OF POLYMER SCIENCE AND ENGINEERING: EMERGING DIMENSIONS (PSE-2010), Under the auspices of APA 2013 (Asian Polymer Association), 2010.

2010

Conference Paper

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “SWELLING STUDIES ON BIODEGRADABLE POLYMERS”, in Second International Conference on Polymer Processing and Characterization (ICPPC – 2010), 2010.

2004

Conference Paper

Dr. Akanksha Saxena Pandit and Rao, V. L., “Hydroxy terminated poly (arylene ether nitrile) with pendant tert’ butyl groups as tougheners for epoxy resin”, in MACRO 2004, National Conference, 2004.

2000

Conference Paper

Dr. Akanksha Saxena Pandit and Rao, V. L., “Synthesis and properties of poly ether nitrile sulphone co-polymers”, in MACRO 2000, National Conference, 2000.

Publication Type: Journal

Year of Publication Publication Type Title

2015

Journal

B. Habib, Dr. Akanksha Saxena Pandit, Mondal, I., Rajvanshi, A., Mathur, V. B., and Negi, H. S., “Proposed Mitigation Measures for Maintaining Habitat Contiguity and Reducing Wild Animal Mortality on NH 6 & 7 in the Central Indian Landscape”. 2015.[Abstract]


The latest tiger census conducted in India during the year 2014 shows that it harbours 57% of the global tiger population in 7% of their historic global range. At the same time, India has 1.25 billion people growing at a rate of 1.7% per year. Protected tiger habitats in India are geographically isolated and collectively holds this tiger population under tremendous anthropogenic pressure. These protected lands are in itself not enough to sustain the growing tiger population, intensifying human-tiger conflict as dispersing individuals enter human occupied areas. These factors – isolation and inadequate size of the protected lands harbouring tiger meta-populations, highlight the need to connect tiger habitats and the importance of corridors beyond protected lands. It is imperative to conserve such corridors passing through private lands to safeguard the long-term survival of the tigers in India. The goal of long-term tiger conservation in India lies in smartly integrating tiger conservation concerns in various sectors where tiger conservation is not the priority. To effectively tap into all these resources, we propose a “Triage of Means” strategy. Here we do not prioritize species, populations or sites due to the non-availability of conservation resources. Instead, we aim to prioritize from available resources (means to achieve conservation) from other sectors where tiger conservation is not the focus. We outline how to prioritise resources available from various sectors into conservation by prioritizing issues hampering tiger conservation beyond protected habitats. More »»

2006

Journal

V. Lakshamana Rao and Dr. Akanksha Saxena Pandit, “A novel epoxy resin composition and a process for preparing the epoxy resin composition”. 2006.

Publication Type: Conference Proceedings

Year of Publication Publication Type Title

2012

Conference Proceedings

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Thermal and Morphological characterization of Sodium Alginate and Lignosulphonic acid Blends”, IMPC 2012. M.G.University, Kottayam, Kerala, India, 2012.

2011

Conference Proceedings

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Effect of Sodium Alginate on SA/LS blends for pH-Responsive Swelling for Drug delivery to the Gastrointestinal Tract”, APSRT 2011. IIT Kharagpur, India., 2011.

2010

Conference Proceedings

Dr. S. Giridhar Reddy and Dr. Akanksha Saxena Pandit, “Swelling Behavior of Calcium–Ions Cross linked Bipolymeric Sodium Alginate–Lignosulphonic acid blends”, ICPPC 2010. M.G. University, Kerala, India, 2010.

Publication Type: Thesis

Year of Publication Publication Type Title

2005

Thesis

Dr. Akanksha Saxena Pandit, “STUDIES ON POLY ARYLENE ETHER WITH NITRILE GROUPS.”, University of Kerala / Vikram Sarabhai Space Centre, Thiruvananthapuram, 2005.

Faculty Research Interest: 
207
PROGRAMS
OFFERED
5
AMRITA
CAMPUSES
15
CONSTITUENT
SCHOOLS
A
GRADE BY
NAAC, MHRD
9th
RANK(INDIA):
NIRF 2017
150+
INTERNATIONAL
PARTNERS