N. Balasubramanian

Anna University, Chennai

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

C. Srinivasakannan

Khalifa University of Science and Technology

R. Saravanathamizhan

Anna University, Chennai

C. Ahmed Basha

Central Electrochemical Research Institute

S. Vadivel

SRM Institute of Science and Technology

Manokaran Janakiraman

Anna University, Chennai

A. Muthukrishnaraj

Amrita Vishwa Vidyapeetham

Shanmuga Sundar Saravanabhavan

Vinayaka Missions University

Kamalakannan Vasantha Palaniappan

Anna University, Chennai

Keerthi Praveen

Anna University, Chennai

Narendranath Jonna

Manipal Academy of Higher Education

Cooperative Institutions

University of Birmingham

3,172

NIHR Birmingham Biomedical Research Centre

2,040

Institut de Virologie

1,971

Yorkshire Cancer Research

1,859

Urology Foundation

1,747

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie

1,722

Association for Cancer Surgery

1,596

AstraZeneca (Brazil)

1,334

Stryker (United Kingdom)

1,179

Pfizer (United Kingdom)

953

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Synthesis of graphene by electrochemical exfoliation from petroleum coke for electrochemical energy storage application

Journal of Electrochemical Science and Engineering (2023)

Dhana Priya Singaramohan R. Saravanathamizhan Manimozhi Veerasamy Santhoshini Priya Thomas N. Balasubramanian

The objective of the present work was to synthesize a graphene-like structure from petroleum coke (pet coke). Graphene is a potential alternative conducting material to replace traditional electrode materials such as indium tin oxide. The phosphoric acid was used to activate the pet coke in conditions where the coke to acid ratio is varied as 1:1, 1:2, 1:3, 1:4 and 1:5. The samples were kept at different temperatures in the furnace maintained in inert atmospheric conditions at 400, 500 and 600 °C for activation time intervals of 1, 2 and 3 h. The extent of activation of pet coke samples was characterized by their yield and iodine number. For the optimized conditions (600 °C, 3 h, 1:4 coke to acid ratio), the activated pet coke was moulded and taken as the anode for electrochemical exfoliation using platinum wire as cathode, and 0.3 M H2SO4 solution as electrolyte. The electrochemical exfoliation was carried out using DC power supply at 22 V for 8 h, and the obtained exfoliated product was analysed by surface-sensitive techniques (XRD, Raman and SEM). The specific capacitance values were measured using cyclic voltammetry in KOH, Na2SO4 and H2SO4 electrolytes. The highest specific capacitance value of 40 F g-1 for the scanning rate of 25 mV s-1 was obtained in 1 M H2SO4. It was confirmed that graphene-like structure produced from activated pet coke can be used as an alternate material for supercapacitor applications.

Exfoliation joint

Inert gas

10.5599/jese.2005

Cite

Citations (0)

Indirect Spectrophotometric Determination of Thiamine in Pharmaceutical Preparations.

Chemical and Pharmaceutical Bulletin (1997)

Kailasam SRIVIDYA N. Balasubramanian

An indirect, sensitive spectrophotometric method for the assay of thiamine is described. The procedure is based on the formation of a mercaptide by thiamine, with a known excess of silver ions in a buffered medium of pH 9.0 +/- 0.1. The unreacted silver ions are determined by the formation of an ion-pair complex with 1,10-phenanthroline and 2,4,5,7-tetrabromofluorescein, which shows an absorption maximum at 550 nm. The absorbance is found to decrease linearly with increasing concentrations of thiamine, which is corroborated by the calculated correlation coefficient value of -0.998. The system obeys Beer's law for 0-25 micrograms of thiamine in an overall aqueous volume of 10 ml. The molar absorptivity and relative standard deviation (RSD) were calculated to be 7.8 x 10(4) l mol-1 cm-1 and 2.5% (n = 10), respectively. The proposed method was applied successfully to the determination of thiamine in pharmaceutical preparations. The reliability of the assay was established by parallel determination by the standard thiochrome method and recovery studies.

Molar absorptivity

Absorbance

10.1248/cpb.45.2100

Cite

Citations (15)

Bismuth Enriched Materials for Pseudo Capacitor Applications

Elsevier eBooks (2021)

S. Vadivel S. Hariganesh Bappi Paul N. Balasubramanian Saravanan Rajendran

Bismuth

10.1016/b978-0-12-819723-3.00039-1

Cite

Citations (2)

Clever optics. Conference held at San Diego, Calif., USA, 25 - 26 August 1977.

Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1977)

N. Balasubramanian James C. Wyant

Source

Cite

Citations (0)

Modifications to drafting system for improvement in yarn quality

N. Balasubramanian Rema Krishnaswamy Jyotsna Sharma L B S Marg

The benefits arising from certain modifications in ring frame drafting system to yarn quality and spinning performance have been discussed. Nose bar was modified by introducing a depression in its height for a portion of the width on the front side. Different levels of depression were tried. The modification has been found to give about 14-45% reduction in yarn imperfections, the reduction being more prominent with short staple cottons. The studies extended to mills also confirm the reduction in yarn imperfections. Besides, some reduction in end breakage rate in ring frame and winding has been observed with modified nose bar. Lowering the nose bar height also reduces imperfections, but the order of improvement thus obtained is lower than that obtained by using modified nose bar. Modified nose bar brings down the imperfections with aU the apron spacers. Use of soft cots of 65° shore hardness at the front in combination with modified nose bar brings down the yarn imperfections by 35-55% and U% by 1-1.5 units. Offsetting of back top roller also shows a marginal reduction in imperfections provided that the optimum back zone setting and break drafts are used.

Bar (unit)

Source

Cite

Citations (1)

Graphene oxide–BiOBr composite material as highly efficient photocatalyst for degradation of methylene blue and rhodamine-B dyes

Journal of Water Process Engineering (2014)

S. Vadivel M. Vanitha A. Muthukrishnaraj N. Balasubramanian

Rhodamine B

Absorbance

Methylene blue

Visible spectrum

10.1016/j.jwpe.2014.02.003

Cite

Citations (115)

Energy consumption and CO<SUB align="right">2 emissions by the Indian mobile telecom industry

International Journal of Critical Infrastructures (2012)

S.S. Krishnan N. Balasubramanian Anjali Ramakrishnan

The Indian mobile telecom industry, one of the fastest growing sectors in India, had 584.3 million subscribers in 2010–2011 registering an annual growth rate of 49.15%. The energy consumed by the sector was 163 PJ and the corresponding CO2 emission was estimated at 32.9 million tons. In this paper, the mobile telecom industry is disaggregated into various segments, based on the lifecycle of the device, and each segment’s contribution to the overall energy consumption, and its respective CO2 emissions are discussed. In addition, the paper evaluates four scenarios that examine the impact of energy efficiency on energy savings and the corresponding CO2 emissions relative to the ‘business as usual’ scenario for 2010–2020. The results of the study provide an imperative to researchers working on next generation infrastructure and energy efficiency to develop new technologies that will reduce the energy consumption and the corresponding CO2 emissions of the growing Indian mobile telecom industry.

Consumption

10.1504/ijcis.2012.049035

Cite

Citations (4)

Removal of heavy metals by hybrid electrocoagulation and microfiltration processes

Environmental Technology (2013)

Keerthi V. Vinduja N. Balasubramanian

This study is based on the investigation of the performance of electrocoagulation (EC), followed by the microfiltration process for heavy metal removal in synthetic model waste water containing Zn2+, Ni2+ and Cd2+ ions. Effects of initial concentration, current density and pH on metal removal were analysed to optimize the EC process. The optimized EC process was then integrated with dead-end microfiltration (MF) and was found that the hybrid process was capable of 99% removal of heavy metals. The cake layer formed over the membrane by the hybrid process was analysed through scanning electron microscope-energy-dispersive X-ray spectroscopy. The particle size analysis of the sludge formed during EC was done to investigate the fouling caused during the process.

Electrocoagulation

Membrane Fouling

10.1080/09593330.2013.796005

Cite

Citations (30)

Modeling Particulate Bed Electrode for Metal Recovery

International Journal of Electrochemical Science (2012)

R. Thilakavathi N. Balasubramanian C. Srinivasakannan Ahmed Al Shoaibi

A theoretical model has been developed to predict bed thickness and hydrodynamic behavior of conducting particles in an expanded bed used for heavy metal removal. Two-dimensional model has been developed to predict the particle behavior in expanded bed electrode. Model equations have been developed for electrode thickness and bed porosity. The effect of particle size on metal recovery has been critically examined. The present model simulations have been compared with the experimental data reported in literature.

Particle (ecology)

10.1016/s1452-3981(23)13420-1

Cite

Citations (5)

Pararosaniline as a New Chromogen for the Extractive Spectrophotometric Determination of Trace Amounts of Hydrogen Sulfide in Air

Journal of AOAC International (1993)

B. S. M. Kumar N. Balasubramanian

Abstract A sensitive spectrophotometric method for the determination of trace amounts of hydrogen sulfide H2S) in air, after fixing in a zinc acetate–disodium ethylenediaminetetraacetate–sodium hydroxide solution, is described. The reaction of iodate with the fixed H2S in the presence of acid and an excess of chloride leads to the formation of ICI2 ions. The resulting IC-2 species forms an ion par with pararosaniline cation, and the product is extracted into isopentyl alcohol. The color system obeys Beer’s law over the range of 0 to 5.0 μg H2S. The molar absorption coefficient of the color system is 1.8 × 104 L mol-1 cm-1 . The coefficient of variation is 3.3% for 10 determinations at 3.0 μg H2S. The effect of interfering gases on the determination is discussed. The method was applied to the determination of residual amounts of H2S present in a laboratory fume cupboard, and results were compared to those obtained by the widely used methylene blue method. The current method can be used to determine residues as low as 0.2 μg H2S.

Iodate

Trace Amounts

Methylene blue

Sodium hydroxide

Color reaction

Triarylmethane dye

10.1093/jaoac/76.4.730

Cite

Citations (3)