Yashoda Puttaiahgowda

Manipal Academy of Higher Education | MAHE · Department of Chemistry, MIT Manipal

The present study concentrated on estimating the thermal conductivity, stability, efficiency, and resistance of a heat pipe for heat exchangers, which were essential for many industrial applications. To achieve this, copolymer of amphiphilic poly (styrene-co-2-Acrylamido-2-methylpropane sulfonic acid) poly (STY-co-AMPS) was synthesized by free radi...

Due to the rise of nosocomial infections and the increasing threat of antibiotic resistance, new techniques are required to combat bacteria and fungi. Functional antimicrobial biodegradable materials developed from low-cost renewable resources like polysaccharides would enable greater applications in this regard. Our group has developed and charact...

A simple, robust one step reaction for the preparation of hydrophilic crosslinked piperazine polymer is presented. The resulting crosslinked polymer was synthesized via solution polymerization technique and characterized using FTIR and NMR spectral studies (¹H NMR, ¹³C NMR and DEPT-135). The thermal analysis of polymer was done using thermogravimet...

In recent years, microbial pathogens, which are major sources of infections, have become a widespread concern across the world. The number of deaths caused by infectious diseases is continually rising, according to World Health Organization records. Antimicrobial resistance, particularly resistance to several drugs, is steadily growing in percentag...

Antimicrobial polymers represent a promising class of materials with inimitable features for fighting infections caused due to microorganisms. Antimicrobial polymers are synthesized using various monomers. N-vinylpyrrolidone (NVP) is one of such monomers known for its biocompatibility which has received lots of attention due to its low cytotoxicity...

The spread of microbes which cause infectious diseases are of great concern on human health. Therefore, a water-soluble cross-linked polymer based on polyvinyl alcohol was synthesized via an economical, facile, and aqueous-based approach. The resultant cross-linked polymer was characterized by different techniques such as FTIR, ¹ H NMR, ¹³ C NMR, T...

Antimicrobial resistance is increasingly recognized as a serious worldwide threat, jeopardizing medical progress and our ability to treat infectious illness. Antimicrobial polymers have sparked the interest of researchers because of the increased demand for enhancing human health by lowering illness caused by different bacteria. Polysaccharides are...

Microbes are omnipresent. They play a prominent role in maintaining the surrounding we live in. Among these microorganisms, pathogenic microbes pose a major threat to public health. During the last century, many medicines with novel solutions to combat microbial infections were discovered. Gradually, the use of these medicine’s/antibiotics started...

A wreaking havoc condition in current urges the use of antimicrobial materials at its maximum. The various sectors such as health-care institutions, food packaging, textile industry, water-purification system, and so on, have high demand for the use of antimicrobial materials and paint industry is one amongst them. Since millennium, paints has been...

Microbial infections are a life threatening concern in several areas, which include the biomedical sector, healthcare products, water purification systems, and food packaging. Polymers with low molecular weight bioactive agents or disinfectants help the scientific community to reduce the lethality rate caused by pathogenic microbes. Antimicrobial p...

The current global death rate has threatened humans due to increase in deadly unknown infections caused by pathogenic microorganisms. On the contrary, the emergence of multidrug-resistant bacteria is also increasing which is leading to elevated lethality rate worldwide. Development of drug-resistant bacteria has become one of the daunting global ch...

One-step wet chemical method has been employed for the synthesis of silver (Ag) nanofluids followed by the preparation of polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA) and PVP–PVA mixed-dispersant-stabilized nanofluids by varying the concentration ratio of dispersants for the viscosity and thermal conductivity analysis. The optical absorptio...

It is significantly accepted that microorganisms such as bacteria, yeast, fungi, and algae inhabit our world, which dominate us in number and size. We only happen to wander for a certain period of time in their world. In spite of our own cell count, even our own body is outnumbered by 10:1 microbial cells and we are living only because we can accep...

In this work, the effect of poly(styrene-co-maleic anhydride)-grafted methoxy (polyethylene glycol) (SMA-g-MPEG) copolymer as dispersants on the viscosity and thermal conductivity of zinc oxide (ZnO)–water-based nanofluids was studied. Various molecular weight MPEGs were grafted to SMA copolymer by esterification reaction, and ZnO nanoparticles (NP...

The present investigation focuses on the effect of microwave watt power for the synthesis of ZnO nanoparticles (NPs) by microwave irradiation using two different precursors. The prepared samples were confirmed by XRD, SEM and EDXA to analyse the particle size, morphology and chemical composition of ZnO NPs. SEM images were recorded for the synthesi...

The development of antimicrobial coatings in various sectors is escalating nowadays. However, design, synthesis, and fabrication of simple antimicrobial polymer coatings with potent biocidal action against pathogenic microbes are necessary to emerge. The current article deals with fabrication of high efficient ultrathin coatings of synthesized poly...

The aim of the present work is to investigate the change in thermal conductivity and stability of copper oxide (CuO) water-based nanofluids, which are prepared by a two-step process, with different concentrations of anionic (Sodium dodecyl sulfate SDS) and nonionic dispersants (Polyvinyl pyrrolidone PVP). Further, CuO nanofluids and nanoparticles h...

A simple, robust, and eco‐friendly technique for the fabrication of functionalized Jeffamine polymer in an aqueous medium is developed. The polymer is prepared by post polymerization modification of Jeffamine ED‐2003 of molecular weight 2000. The structure of the modified polymer was studied in detail using FTIR and NMR (¹H and ¹³C NMR) spectroscop...

The paper and pulp industry (PPI) produces high quantities of solid and liquid discharge and is regarded as the most polluting industry in the world causing adverse effects to environments and human beings. Hence changes in the way PPI sludge and waste materials are treated is urgently required. Nearly, 10 million tons of waste is generated per yea...

An efficient hydrophilic-antimicrobial thin film coating of functionalized polymaliamides for controlling pathogenic microorganisms is reported in this article. The article is enriched with synthesis, characterization and antimicrobial studies of polymaliamides and its thin film. FTIR, ¹H NMR, ¹³C NMR details of the polymaliamidesis explicated,and...

The increased interest has grown towards polymer nanocomposite materials exhibiting unique properties. Currently, the importance of antifungal materials is growing in various fields. Since many years the silver compounds are known as disinfectants with broad-spectrum antimicrobial activity. Over 2,000 years ago silver compounds were recognized for...

Eco-friendly technique was adopted for the preparation of piperazine polymer nanocomposites is developed via green synthetic route in one-pot approach. The structure and properties of polymer nanocomposite were confirmed by using UV-Visible spectroscopy, XRD and SEM. The synthesized piperazine nanocomposite showed very good antimicrobial activity a...

Poly(N-vinyl-2-pyrrolidone-maleic anhydride-styrene) terpolymer was prepared using AIBN initiator with acetone as solvent. The terpolymer was grafted with anti-bacterial agents para-aminobenzoic acid and 2,4-dichlorophenol to introduce bactericidal activity to the terpolymer. The terpolymer and the grafted polymers were characterized by FTIR, ¹H-NM...

The purpose of this article is to develop degradable quaternary ammonium polymerizable surfactants and their copolymers with methyl methacrylate. Such polymers work efficiently against harmful microbes. The antimicrobial properties were tested against recombinant E. coli to understand its efficiency over superbugs. E. coli culture was developed by...

Present paper discuss the synthesis and characterization of metal (II) octa-(2e)-3-prop-phenyl-2-en-1-imine phthalocyanines (M-PropPhImPcO) (M = Cu, Co, Ni, Zn) by an efficient, simple, and novel method. Octaamino metal (II) phthalocyanines were synthesized by the reduction of the corresponding nitro phthalocyanines. The dark green octa-1-(3-nitrop...

A series of poly(N-vinyl-2-pyrrolidone–maleic anhydride–styrene) terpolymers have been synthesized using titanium(III)-dimethylglyoxime redox initiator system. The usage of redox initiators in the terpolymerization was limited; hence it should be considered as a new approach. The reactivity of the monomers has been studied by well-accepted Kelen-Tu...

The polymerization of methyl methacrylate initiated by the titanium(III)-salicylaldoxime redox system was studied in an aqueous sulfuric acid-ethanol medium in the temperature range of 20–30°C. The rates of polymerization were investigated at various concentrations of reductant, oxidant, ethanol, sulfuric acid, and monomer. Cyclic voltammetric sens...

Methyl methacrylate was polymerised in an aqueous sulphuric acid–methanol medium in a divided cell by an electrolytically generated mediator species titanium(III). Titanium(III)–hydroxylamine sulphate was used as the initiator redox system. The reaction was confined to the cathode compartment and was found to proceed via a free radical mechanism. K...

Acrylonitrile was polymerized in an aqueous sulphuric acid–methanol medium by an electrolytically generated mediator species, titanium(III). Titanium(III)–dimethylglyoxime was used as the initiator redox system. The reaction was confined to the cathode compartment and was found to proceed via a free radical mechanism. The kinetics of polymerization...

Titanium (III) mediated electroreduction of dimethyl glyoxime has been carried out in aqueous sulphuric acid medium and the reduction product has been isolated and characterised. The kinetic investigations have been carried out under stoichiometric and non-stoichiometric conditions at 306K. It has been found that the reaction follows overall second...