Jackson Gurung
@nbxc.org
Chemistry
North Bengal St. Xavier's College
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Rajani Singh, Jackson Gurung, Amlan Jyoti Gogoi, and Ajmal Koya Pulikkal
Elsevier BV
J. Rozamliana, Jackson Gurung, and Ajmal Koya Pulikkal
Elsevier BV
J. Rozamliana, Jackson Gurung, and Ajmal Koya Pulikkal
Elsevier BV
J. Rozamliana, Jackson Gurung, and Ajmal Koya Pulikkal
Elsevier BV
Yumnam Gyani Devi, Ajmal Koya Pulikkal, and Jackson Gurung
Wiley
Dipankar Saha, Jackson Gurung, Bidesh Roy, Ajmal Koya Pulikkal, Abhijit Bhowmik, and Satyajit Pattanayak
Springer Science and Business Media LLC
The widespread usage of plastic grocery bags, as well as their non-biodegradability, has turned out to be a stern reason for waste generation. With regard to plastic grocery bag disposal, pyrolysis is an encouraging solution that addresses the energy crisis issue as well. This study examined the interactive influences of pyrolysis temperature, residence time, and nitrogen flow for plastic grocery bag pyrolysis to optimize waste plastic oil yield by the Grey–Fuzzy–Taguchi method. Additionally, mass–energy assessment and characterization were done for the waste plastic oil, extracted at the optimal parametric condition. The optimal parametric combination was: temperature 400 °C, time 360 min, and nitrogen flow rate 20 ml/min. The liquid yield at optimal condition was 78.57%, and a minimal error (2.53%) between the predicted and experimental grey fuzzy grade was observed. The oil achieved at optimal condition showed a high hydrocarbon content with a higher heating value of 46,685 kJ/kg. The values of mass ratio, energy ratio, energy efficiency, and energy consumption ratio for the liquid oil were 0.79, 0.89, 0.63, and 0.47, respectively, which indicate the energy favorability for plastic grocery bag pyrolysis. FT-IR results demonstrated mainly the existence of alkene and alkane functional groups in the waste plastic oil. GC–MS results revealed that the oil contains mainly light and middle fractions of 26.4% and 62.7%, respectively, with a smaller proportion (10.9%) of heavy fraction. Finally, the optimum parametric combination can be considered a useful condition for extracting quality fuel from plastic grocery bags.
Jacqueline Lalthlengliani, Jackson Gurung, and Ajmal Koya Pulikkal
Elsevier BV
C. Parvathiraja, S. Shailajha, S. Shanavas, and J. Gurung
Springer Science and Business Media LLC
Yumnam Gyani Devi, Jackson Gurung, and Ajmal Koya Pulikkal
American Chemical Society (ACS)
Jackson Gurung, Jamsheera Anjudikkal, and Ajmal Koya Pulikkal
Elsevier BV
Jackson Gurung and Ajmal Koya Pulikkal
Informa UK Limited
Abstract Addition of organic solvents is known to change the properties of amphiphiles through modification of bulk phase. Amitriptyline hydrochloride (AMT) is a tricyclic amphiphilic drug which is usually used as an antidepressant. In drug delivery, the cloud point (CP) of the drug is an important parameter. This article discusses the effects of ethanol–water (EtOH–WR) compositions on the energetic parameters, such as changes in Gibbs energy of clouding (ΔsG0), enthalpy of clouding (ΔsH0), and entropy of clouding (TΔsS0) of AMT-additive systems. Monovalent alkali halide salts, cationic conventional surfactants, and gemini surfactants were used as additives in the EtOH–WR mixed media whose compositions were varied between 0 and 15% (w/w). The ΔsG0 values are positive for all the additives and the values decrease with the rise in mole fractions of the additives. The ΔsH0 and TΔsS0 were noted to be positive except for KF in 15% EtOH–WR mixed media.
Jackson Gurung and Ajmal Koya Pulikkal
American Chemical Society (ACS)
Organic solvent–water mixed media find applications in industrial, chemical, and pharmaceutical areas. This work discusses the micellization and related parameters such as degree of counterion dissociation (α), change in Gibbs energy of micellization (ΔGm0) of an amphiphilic drug amitriptyline hydrochloride (AMT), and Gordon parameter (Gp) in three polar organic solvents, viz., ethanol (EtOH), ethylene glycol (EG), and glycerol (GL)–water mixed media, with a special focus on the effects of a wide range of polarity changes. A decrease in conductivity of the solution and an enhancement of critical micelle concentration (cmc) of AMT are found with the increase in weight percentage (wt %) of the organic solvents in their mixed media at a pH of 6.7 and a temperature of 303.15 K. The cmc and absorbance values evaluated from conductivity and dye solubilization measurements, respectively, reveal that the GL–water mixed media behave as a better system for AMT compared to the EG–water and EtOH–water mixed media. Th...
Satyajit Pattanayak, Laxman Mishra, and Jackson Gurung
Wiley
Schedule maintenance programs rely on the analysis of collected data during running and shut down time. In a preventive maintenance program, it is difficult to a priori determine the time limit or set an alarm indicating the failure time of a specific component. To this end, a Visual Basic 6.0–based software program is here proposed for a comprehensive running and maintenance database management. The developed software is capable of storing all relevant data related to parts, equipment, personnel, spares, failures, costs, etc, and displays a warning message when the expected life of a particular component has been reached. An unscheduled outage heavily impacts on the production cycle costs, depending on the nature of the failure and the damaged part. Since the variation of the used parts and equipment is high, it is not possible to have an all‐encompassing maintenance guide, which is applicable to all equipment. A successful program of preventive and routine maintenance may hence decrease equipment failures rates, extend equipment life, and drastically reduce the overall operating costs. Therefore, the present work can help in preventing unscheduled breakdown of operating systems due to a failure in a component.
Jackson Gurung and Ajmal Koya Pulikkal
American Chemical Society (ACS)
In this work, the effect of ethanol (EtOH) at different weight percentages (wt %) (0, 5, 10, and 15% w/w) is accounted for in the clouding phenomena of the AMT drug with/without additives (inorganic salts and conventional and gemini surfactants). The critical micelle concentration (cmc) and degree of counterions dissociation (α) of AMT solution at 30 °C in SP buffer (pH 6.7), studied through conductometric studies, are found to be enhanced with the increase in ethanol content due to the reduction in the dielectric constant of mixed media. A dye solubilization study performed under identical physicochemical conditions exhibited supporting results. Clouding could not be observed in 20 wt % EtOH–WR mixed media at pH 6.7. The effects of additives on the CP in 15 wt % EtOH–WR at a pH of 6.95 were also studied. Furthermore, the effect of pH (range 6.7 to 7.15) on the CP in the presence of KCl at the same composition of the mixed media reduce the clouding temperature due to the deprotonation of AMT headgroups. F...
Ajmal Koya Pulikkal and Jackson Gurung
Royal Society of Chemistry (RSC)
The influence of ethylene glycol (EG)/glycerol(GL)–water mixed media on clouding action of an amphiphilic drug, amitriptyline hydrochloride was studied in presence and absence of inorganic salts in selected compositions of EG–WR and GL–WR mixed media.
Jackson Gurung and Pulikkal Ajmal Koya
Wiley