Intense pulse flash white light combined with deep UV irradiation sintering of ZnO nanosheets for dye sensitized solar cell application

Supriya A.Patil,Hyun-Jun Hwang,Myeoung-Hyun Yu,Hak-Sung Kim 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.4

Synthesis and Characterization of Copper Nanoparticles (Cu-Nps) using Rongalite as Reducing Agent and Photonic Sintering of Cu-Nps Ink for Printed Electronics

Supriya A. Patil,류정현,김학성 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.5 No.2

Copper nanoparticles (Cu-Nps) are one of the promising material for the advancement of nanoscience and technology. In this work, we successfully synthesized Cu-Nps using sodium hydroxymethanesulinate (Rongalite) as a novel reducing agent via solution process. Cu-Nps were achieved from chemical reduction of copper salt within 10-20 min at low temperature without using any complexing agent. In order to investigate the phase, size, and composition of the synthesized Cu-Nps, X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) were employed. Average particle size of the synthesized Cu-Nps is 152 nm. It is expected that the outcomes of this study take a step closer towards designing general strategies for a simple, environment friendly and low cost synthesis method of Cu-Nps. The synthesized Cu-Nps are mixed with commercial Cu-Nps and sintered using photonic sintering process. To determine the optimum sintering energy, the flash light irradiation energy was varied and optimized. An XRD and SEM were used to characterize the sintered Cu-Nps. The resulting sintered Cu-Nps exhibited a low resistivity (20.73 μΩcm) without any damages of the polymer substrate.

Fuzzy Inference Based Electricity Theft Prevention System to Restrict Direct Tapping Over Distribution Line

Supriya Jaiswal,Makarand S. Ballal 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.3

Electricity theft is a major concern for power distribution utilities. The increase in non-technical losses give rise to imbalance between electricity supply and demand resulting into overloading of existing distribution network, reduction in reliability and stability of supply and additional tarif posed on genuine consumers. Although, the smart metering systems has resolved meter related power theft problems, however, direct tapping on distribution line remains perpetual issue which should be stringently annihilated. Thus, this paper presents real-time electricity theft detection using energy consumption data of all legal consumers and outgoing distribution transformer energy meter data. In order to prevent the hook-line activity, a fuzzy inference based scheme is implemented in LabVIEW to operate electricity theft prevention system (ETPS). The ETPS develops unsuitable voltage across illegal consumer and hinders normal operation of their appliances. The consumer care unit (CCU) interlocked with ETPS maintains normal supply voltage at legal consumers end. The suitability, fexibility in operation and efectiveness of the proposed ETPS and CCU based theft prevention scheme is experimentally and practically demonstrated as case study under various voltage regulation and energy loss scenarios.

Influence of single nucleotide polymorphisms (SNPs) in genetic susceptibility towards periprosthetic osteolysis

Supriya Jagga,SHARMA ASHISH RANJAN,Manojit Bhattacharya,Chiranjib Chakraborty,이상수 한국유전학회 2019 Genes & Genomics Vol.41 No.10

Wear debris-induced inflammatory osteolysis remains a significant limiting factor for implant replacement surgeries. Hence, a comprehensive understanding of the complex network of cellular and molecular signals leading to these inflammatory responses is required. Both macrophages and monocytes have a critical role in the instigation of the inflammatory reaction to wear debris but differ in the extent to which they induce cytokine expression in patients. Lately, single nucleotide polymorphisms (SNPs) have been associated with genetic susceptibility among individual patients with implant failure. Studies have shown that SNPs in key pro-inflammatory cytokines and their receptors are associated with osteolytic susceptibility. Likewise, SNPs within several genes involved in the regulation of bone turnover have also been found to be associated with wear debris induced osteolysis. It is presumed that SNP variance might play a decisive role in the activation and signaling of macrophages, osteoblasts, chondrocytes, fibroblasts and other cells involved in inflammatory bone loss. Understanding the extent to which SNPs exist among genes that are responsible for inflammatory bone loss may provide potential targets for developing future therapeutic interventions. Herein, we attempt to summarize the various susceptible genes with possible SNP variance that could contribute to the severity of periprosthetic osteolysis in patients with implants.

Nano oxalates of Fe, Co, Ni: Burning rate modifiers for composite solid propellants

Supriya Singh,Gurdip Singh Virk,Pratibha Srivastava 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-

We highlight here current research focused on the catalytic activity of nano oxalates of Fe, Co and Nisynthesized by colloidal precipitation method. The catalytic activity of these nano oxalates wasexamined for the thermal decomposition of ammonium perchlorate (AP) and composite solidpropellants (CSPs) using thermogravimetry (TG), TG coupled with differential scanning calorimetry (TG–DSC) and ignition delay measurements. All the nano oxalates showed very high activity as burning ratecatalysts for composite solid propellants (CSPs) containing hydroxyl terminated polybutadiene (HTPB)as binder and AP as oxidizer. CoC2O4 2H2O was found to be the best catalyst in terms of loweringdecomposition temperature of both AP and CSPs

Carbohydrase inhibition and anti-cancerous and free radical scavenging properties along with DNA and protein protection ability of methanolic root extracts of Rumex crispus

Supriya Shiwani,Naresh Kumar Singh,Myeong Hyeon Wang 한국영양학회 2012 Nutrition Research and Practice Vol.6 No.5

The study elucidated carbohydrase inhibition, anti-cancerous, free radical scavenging properties and also investigated the DNA and protein protection abilities of methanolic root extract of Rumex crispus (RERC). For this purpose, pulverized roots of Rumex crispus was extracted in methanol (80% and absolute conc.) for 3 hrs for 60℃ and filtered and evaporated with vacuum rotary evaporator. RERC showed high phenolic content (211 ㎍/GAE equivalent) and strong 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging (IC50 = 42.86 (absolute methanol) and 36.91 ㎍/mL (80% methanolic extract)) and reduced power ability. Furthermore, RERC exhibited significant protective ability in H₂O₂/Fe<SUP>3+</SUP>/ascorbic acid-induced protein or DNA damage and percentage inhibition of the HT-29 cell growth rate following 80% methanolic RERC exposure at 400 ㎍/mL was observed to be highest (10.2%± 1.03). Moreover, methanolic RERC inhibited α-glucosidase and amylase effectively and significantly (P < 0.05). Conclusively, RERC could be considered as potent carbohydrase inhibitor, anti-cancerous and anti-oxidant.

Diversity and Bioactive Potential of Culturable Fungal Endophytes of Medicinal Shrub Berberis aristata DC.: A First Report

( Supriya Sharma ),( Suruchi Gupta ),( Manoj K. Dhar ),( Sanjana Kaul ) 한국균학회 2018 Mycobiology Vol.46 No.4

Bioactive natural compounds, isolated from fungal endophytes, play a promising role in the search for novel drugs. They are an inspiring source for researchers due to their enormous structural diversity and complexity. During the present study fungal endophytes were isolated from a well-known medicinal shrub, Berberis aristata DC. and were explored for their antagonistic and antioxidant potential. B. aristata, an important medicinal shrub with remarkable pharmacological properties, is native to Northern Himalayan region. A total of 131 endophytic fungal isolates belonging to eighteen species and nine genera were obtained from three hundred and thirty surface sterilized segments of different tissues of B. aristata. The isolated fungi were classified on the basis of morphological and molecular analysis. Diversity and species richness was found to be higher in leaf tissues as compared to root and stem. Antibacterial activity demonstrated that the crude ethyl acetate extract of 80% isolates exhibited significant results against one or more bacterial pathogens. Ethyl acetate extract of Alternaria macrospora was found to have potential antibacterial activity. Significant antioxidant activity was also found in crude ethyl acetate extracts of Alternaria alternata and Aspergillus flavus. Similarly, antagonistic activity of the fungal endophytes revealed that all antagonists possessed inhibition potential against more than one fungal pathogen. This study is an important step towards tapping endophytic fungal diversity for bioactive metabolites which could be a step forward towards development of novel therapeutic agents.

Antibacterial potential of a small peptide from Bacillus sp. RPT-0001 and its capping for green synthesis of silver nanoparticles

Supriya Deepak Patil,Rajnikant Sharma,Tapas Bhattacharyya,Piyush Kumar,Manasi Gupta,Bhupinder Singh Chaddha,Naveen Kumar Navani,Ranjana Pathania 한국미생물학회 2015 The journal of microbiology Vol.53 No.9

Infirmity and death from diseases caused by unsafe food are a continual hazard to communal health safety and socio-economic growth throughout the world. Chemical preservatives are associated with health hazards and toxicity issues. In the study reported here, 200 soil isolates from Western Himalayan region in India were screened for potential antibacterial activity against food-borne pathogens. This study led to the isolation of a bacterial strain belonging to the Genus Bacillus and was designated as RPT-0001. The associated antibacterial activity was sensitive to pronase E treatment. Bioassay-guided fractionation using reverse phase high performance liquid chromatography (RP-HPLC) led to isolation of the antibacterial peptide designated as RPT-0001. The molecular weight of RPT-0001 was determined by electro- spray ionization mass spectroscopy (ESI-MS) as 276.9 Da. RPT-0001 was inhibitory to both Gram-negative and Grampositive food-borne bacteria tested. The characteristics of RPT-0001 do not match with that of any other known antibacterial peptides produced by Bacillus sp. or related genera. Purified RPT-0001 was successfully used in synthesis of silver nanoparticles effective against food-borne pathogenic bacteria. The antibacterial peptide and silver nanoparticles synthesized utilizing it as a capping and reducing agent hold promising potential in food preservation, in packaging material and as a therapeutic agent in the treatment of foodborne infections.

Approximation of solutions through the Fibonacci wavelets and measure of noncompactness to nonlinear Volterra-Fredholm fractional integral equations

Supriya Kumar Paul,Lakshmi Narayan Mishra 강원경기수학회 2024 한국수학논문집 Vol.32 No.1

This paper consists of two significant aims. The first aim of this paper is to establish the criteria for the existence of solutions to nonlinear Volterra-Fredholm (V-F) fractional integral equations on $[0, L]$, where $0<L<\infty$. The fractional integral is described here in the sense of the Katugampola fractional integral of order $\lambda>0$ and with the parameter $\beta>0$. The concepts of the fixed point theorem and the measure of noncompactness are used as the main tools to prove the existence of solutions. The second aim of this paper is to introduce a computational method to obtain approximate numerical solutions to the considered problem. This method is based on the Fibonacci wavelets with collocation technique. Besides, the results of the error analysis and discussions of the accuracy of the solutions are also presented. To the best knowledge of the authors, this is the first computational method for this generalized problem to obtain approximate solutions. Finally, two examples are discussed with the computational tables and convergence graphs to interpret the efficiency and applicability of the presented method.

Bile duct injury during laparoscopic cholecystectomy: An Indian e-survey

Supriya Sharma,Anu Behari,Ratnakar Shukla,Mukteshwar Dasari,Vinay K. Kapoor 한국간담췌외과학회 2020 Annals of hepato-biliary-pancreatic surgery Vol.24 No.4

Backgrounds/Aims: In the absence of national registry of laparoscopic cholecystectomy (LC) or its complications, it is impossible to determine incidence of bile duct injury (BDI) in India. We conducted an e-survey among practicing surgeons to determine prevalence and management patterns of BDI in India. Our hypothesis was that majority of surgeons would have experienced a BDI during LC despite large experience and that most surgeons who have a BDI tend to manage it themselves. Methods: An 18-question e-survey of practicing laparoscopic surgeons in India was done. Results: 278/727 (38%) surgeons responded. 240/278 (86%) respondents admitted to a BDI during LC and 179/230 (78%) affirmed to more than one BDI. A total of 728 BDIs were reported. 36/230 (15%) respondents experienced their first BDI even after >10 years of practice and 40% had their first BDI even after having performed >100 LCs. 161/201 (80%) of the respondents decided to manage the BDI themselves, including 56/99 (57%) non-biliary surgeons and 44/82 (54%) surgeons working in non-biliary center. 37/201 (18%) respondents admitted to having a mortality arising out of a BDI; the mortality rate of BDI was 37/728 (5%) in this survey. Only 13/201 (6%) respondents have experienced a medico-legal case related to a BDI during LC. Conclusions: Prevalence of BDI is high in India and occurs despite adequate experience and volume. Even inexperienced non-biliary surgeons working in non-biliary centers attempt to repair the BDI themselves. BDI is associated with significant mortality but litigation rates are fortunately low in India.