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Saratale, Ganesh Dattatraya,Saratale, Rijuta Ganesh,Benelli, Giovanni,Kumar, Gopalakrishnan,Pugazhendhi, Arivalagan,Kim, Dong-Su,Shin, Han-Seung Springer-Verlag 2017 Journal of cluster science Vol.28 No.3
<P>The current investigation highlighted a novel cost-effective green synthesis of silver nanoparticles (AgNPs) using Argyreia nervosa leaves extract (ANE) as a potential reducing and capping agent. Surface plasmon resonance confirmed the formation of AgNPs with maximum absorbance at lambda (max) = 435 nm. FTIR revealed the involvement of biological macromolecules of ANE in the synthesis and stabilization of AgNPs. HRTEM images showed that the size of the spherical AgNPs ranged between 5 and 40 nm with average particle size of about 15 nm. The ANE-AgNPs showed inhibition activity against carbohydrate digestive enzymes alpha-amylase and alpha-glucosidase, with EC50 of 55.5 and 51.7 A mu g/mL, respectively, indicating its antidiabetic potential. The in vitro antioxidant activity of ANE-AgNPs was evaluated in terms of ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) and DPPH (1,1-diphenyl-2-picrylhydrazyl) free radicals scavenging assays with IC50 value of 44.3 and 55.9 A mu g/mL, respectively. The AgNPs displayed strong antibacterial activity against foodborne bacteria with zone of inhibition 16.0 and 12.5 mm for Escherichia coli and Staphylococcus aureus, respectively, and also exhibited strong synergistic antibacterial activity together with standard antibiotics. The biological activity in terms of antioxidant, antidiabetic and antibacterial potential could be useful in various bio-applications such as cosmetics, food, and biomedical industry.</P>
Saratale, Ganesh Dattatray,Saratale, Rijuta Ganesh,Kim, Sang Hyoun,Kumar, Gopalakrishnan Elsevier 2018 International journal of hydrogen energy Vol.43 No.25
<P><B>Abstract</B></P> <P>This work evaluated the effects of individual alkaline, sodium carbonate (Na<SUB>2</SUB>CO<SUB>3</SUB> denoted as; NaC), sodium sulfide (Na<SUB>2</SUB>SO<SUB>3</SUB> denoted as; NaS) and combination of NaC + NaS pretreatment for the saccharification of sugarcane bagasse (SCB). The effects of different pretreatments on chemical composition and structural complexity of SCB in relation with its saccharification were investigated. For enzymatic hydrolysis of pretreated SCB we have utilized the produced crude enzymes by <I>Streptomyces</I> sp. MDS to make the process more cost effective. A enzyme dose of 30 filter paperase (FPU) produced a maximum reducing sugar (RS) 592 mg/g with 80.2% hydrolysis yield from NaC + NaS pretreated SCB under optimized conditions. The resulted enzymatic hydrolysates of each pretreated SCB were applied for hydrogen production using <I>Clostridium beijerinckii</I> KCTC1785. NaC + NaS pretreated SCB hydrolysates exhibited maximum H<SUB>2</SUB> production relative to other pretreatment methods. Effects of temperature, initial pH of culture media and increasing NaC + NaS pretreated SCB enzymatic hydrolysates concentration (2.5–15 g/L) on bioH<SUB>2</SUB> production were investigated. Under the optimized conditions, the cumulative H<SUB>2</SUB> production, H<SUB>2</SUB> production rate, and H<SUB>2</SUB> yield were 1485 mL/L, 61.87 mL/L/h and 1.24 mmol H<SUB>2</SUB>/mol of RS (0.733 mmol H<SUB>2</SUB>/g of SCB), respectively. The efficient conversion of the SCB hydrolysate to H<SUB>2</SUB> without detoxification proves the viability of process for cost-effective hydrogen production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pretreatments of alkaline, sodium carbonate, sodium sulfide and combination demonstrated for sugarcane baggase. </LI> <LI> Several crucial factors towards optimization were carried out. </LI> <LI> Peak 59.2 g/L of reducing sugar (RS) with 80.2% hydrolysis yield from NaC + NaS pretreated SCB. </LI> <LI> Significant hydrogen production and process optimization using SCB hydrolysates studied in detail. </LI> </UL> </P>
Electrochemical Oxidation of Phenol for Wastewater Treatment Using Ti/PbO2 Electrode
Saratale, Rijuta Ganesh,Hwang, Kyoung-Jin,Song, Ji-Young,Saratale, Ganesh Dattatray,Kim, Dong-Su American Society of Civil Engineers 2016 Journal of environmental engineering Vol.142 No.2
<P>The electrochemical oxidation of phenol was studied using a Ti/PbO2 electrode prepared by the electrodeposition method with PbO2 coated on Ti. The structural and morphological activity of Ti/PbO2 was analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and intermediates formed after degradation of phenol were quantitatively assessed by high-pressure liquid chromatography (HPLC). Optimization of various parameters such as current density, initial phenol concentration, initial solution pH, and different temperature and dose of Fe2+ on electrochemical degradation of phenol using Ti/PbO2 were investigated. Complete removal of phenol (250mgL-1) was observed at 50 degrees C, potential difference (5V), and at pH 2. Experimental results showed that the phenol removal rate increased with increasing current intensity along with significant reduction in total organic carbon (TOC). Fundamental kinetic data obtained for the degradation of phenol by Ti/PbO2 was found to follow in accordance with the zero-order kinetics with respect to the phenol concentration. This paper is expected to be useful for the development of electrochemical process using Ti/PbO2 for the degradation of phenol containing wastewater. (C) 2015 American Society of Civil Engineers.</P>
Saratale, Rijuta Ganesh,Shin, Han Seung,Ghodake, Gajanan S.,Kumar, Gopalakrishnan,Oh, Min Kyu,Saratale, Ganesh Dattatraya Elsevier 2018 Bioresource technology Vol.258 No.-
<P><B>Abstract</B></P> <P>This study focuses on development of calcium peroxide (CaO<SUB>2</SUB>) pretreatment that removes major part of lignin but retaining most of sugar components of kenaf core powder (KCP) biomass. In chemical pretreatment, usually higher loss of biomass occurs which was less during this pretreatment strategy. Supplementation of inorganic salts; manganese sulfate (MnSO<SUB>4</SUB>) and cobalt chloride (COCl<SUB>2</SUB>) in CaO<SUB>2</SUB> pretreatment resulted in maximum delignification of KCP relative to individual CaO<SUB>2</SUB> pretreatment. Maximum glucose yield (98%) and hydrolysis yield (80.5%) was achieved after enzymatic hydrolysis (30 FPU/g of KCP) under optimized conditions. Analytical results proved effective lignin removal and significant destruction of KCP with this pretreatment strategy. Finally, utilization of KCP enzymatic hydrolysates by developed strain <I>Klebsiella pneumoniae</I> KMK05 resulted in maximum 2,3-butanediol (BDO) production (10.42 g/L) and BDO titer (0.385 g/g of sugar). BDO titer achieved with KCP derived sugars were found comparable with the mixture of standard sugars which is notable.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Developed CaO<SUB>2</SUB> pretreatment & optimized various operational parameters for KCP biomass. </LI> <LI> Addition of inorganic salts improved delignification, glucose yield and total sugar recovery. </LI> <LI> Maximum BDO production (10.42 g/L) was achieved using <I>Klebsiella pneumoniae</I> KMK05. </LI> <LI> This novel pretreatment strategy abstained loss of sugar components of biomass. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
컴퓨터 비전을 활용한 프리팹 바닥판의 scan-to-BIM 자동화
( Ganesh Kolappan Geetha ),( Junhwa Lee ),( Sung-han Sim ) 한국구조물진단유지관리공학회 2023 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.27 No.1
This study presents a novel scheme for 2D shape sensing of prefabricated concrete slabs using computer vision-based scan-to-BIM (building information modeling). In the era of smart and modular construction, dimensional quality assessment (DQA) based feedback of prefabricated concrete slabs enables a hassle-free forward flow of sequential construction and assembling, thereby eliminating additional reworks. The authors developed a scheme for DQA of prefabricated concrete slabs using low-cost unmanned aerial vehicles (UAV) and temporary fiducial markers of known dimensions in the current work. The proposed approach use state-of-the-art image processing schemes coupled with a design model to extract prominent features and reconstruct the 2D shape in an automated manner.
Ganesh Jethave,Umesh Fegade,Sanjay Attarde,Sopan Ingle 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.53 No.-
New LD-ZAO-NPs was facilely synthesized and characterized by FESEM, XRD, EDX and FT-IR. Under the optimal conditions, the MO removal efficiency reached 99.60% after 30 min, Langmuir isotherm and a pseudo second-order kinetic model showed high performance. The thermodynamic parameters showed that the adsorption was spontaneous and favorable as DG0 is negative and exothermic in nature as DH0 is negative (0.025 kJ/mol). The maximum adsorption capacity (qmax) in single component system 200 mg g1 for MO supports high efficiency of LD-ZAO-NPs as new adsorbent. Altogether, the superior performance of LD-ZAO-NPs was manifested by fast kinetics and high adsorption capacity.
Ganesh, M. Gokul,Lavenya, K.,Kirubashini, K.A.,Ajeesh, G.,Bhowmik, Shantanu,Epaarachchi, Jayantha Ananda,Yuan, Xiaowen Techno-Press 2017 Advances in aircraft and spacecraft science Vol.4 No.6
This investigation highlights rationale of electrically conductive nano adhesives for its essential application for Electromagnetic Interference (EMI) Shielding in satellites and Lightning Strike Protection in aircrafts. Carbon Nano Fibres (CNF) were functionalized by electroless process using Tollen's reagent and by Plasma Enhanced Chemical Vapour Deposition (PECVD) process by depositing silver on CNF. Different weight percentage of CNF and silver coated CNF were reinforced into the epoxy resin hardener system. Scanning Electron Microscopy (SEM) micrographs clearly show the presence of CNF in the epoxy matrix, thus giving enough evidence to show that dispersion is uniform. Transmission Electron Microscopy (TEM) studies reveal that there is uniform deposition of silver on CNF resulting in significant improvement in interfacial adhesion with epoxy matrix. There is a considerable increase in thermal stability of the conductive nano adhesive demonstrated by Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). Four probe conductivity meters clearly shows a substantial increase in the electrical conductivity of silver coated CNF-epoxy composite compared to non-coated CNF-epoxy composite. Tensile test results clearly show that there is a significant increase in the tensile strength of silver coated CNF-composites compared to non-coated CNF-epoxy composites. Consequently, this technology is highly desirable for satellites and EMI Shielding and will open a new dimension in space research.
Ganesh Prasad Awasthi,Deval Prasad Bhattarai,Bikendra Maharjan,김경석,박찬희,김철상 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.72 No.-
Herein, we proposed, for thefirst time, a novel activated carbon (AC) material synthesized from Wisteriasinensis (WS) seeds biomass. Characterizations of the material were carried out by Field-emissionscanning electron microscopy, Transmission electron microscopy, X-ray diffraction, Raman spectroscopy,Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller specific surface area analysis. As-synthesized AC was employed as an electrode material to evaluateits applicability in energy storage devices. Results showed enhanced capacitive performance in an acidicelectrolyte compared to the neutral electrolyte at similar current density. Thus, as-synthesized AC couldbe a suitable material for energy storage applications.
( Ganesh Ghimire ),( Yongjun Lee ),( Seokjoon Yun ),서창원,( Hyun Kim ),( Roy Aad ),( Young Hee Lee ),김정용 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Monolayer transition metal dichalcogenide (1L-TMDs) provides a convenient platform to design light emission from 2 dimensionally confined excitonic systems. Many body effects arising from strong interactions among carriers have been of considerable interest in nanoscience. The exciton-exciton annihilation (EEA) process reduces the generated excitons density and affects the performances of the opto-electronic devices. We studied multiexciton dynamics in chemically treated TMDs like MoS<sub>2</sub>, WS<sub>2</sub> and WSe<sub>2</sub> using non-linear photoluminescence (PL) spectroscopy. We also studied the many body correlations between excitons in pristine and chemically treated 1L-TMDs by excitation power dependence of PL and time resolved PL spectroscopy. We observed the decrease of the EEA rate after the chemical treatment.