Subhankar Das - Academia.edu (original) (raw)

Papers by Subhankar Das

Journal of Electronic Materials

We prepared a composite using activated carbon and functionalised multiwalled carbon nanotubes by... more We prepared a composite using activated carbon and functionalised multiwalled carbon nanotubes by a simple and cost-effective process and investigated its use for supercapacitor application. The electrochemical performance of the prepared composite has been investigated by galvanostatic charge-discharge (GCD) and cyclic voltammetry (CV) measurements in a three-electrode setup. The composite resulted in maximum specific capacitance of 395 F/g at 5 mV/s as measured by CV, and of 372 F/g at 60 A/g by GCD measurement in 3M KOH aqueous electrolyte. High power and energy density of 75.27 kW/kg and 25.31 WAEh/kg at 60 A/g have been respectively obtained for composite using GCD measurement. The long-term charge-discharge stability has been performed for the composite electrodes, and it is observed that 89% of capacitance is retained even after 5000 cycles. The achieved results suggest that the prepared activated carbon/multiwalled carbon nanotube composite can be a potential electrode material in high-performance supercapacitors for energy storage applications.

Journal of Pharmacognosy and Phytochemistry, 2019

The present study was carried out at Rispana River milli watershed located in Uttarakhand state. ... more The present study was carried out at Rispana River milli watershed located in Uttarakhand state. The Rispana river which is a tributaries of Ganga, flows from Mussoorie and passes through Dehradun. Rispana river catchment in different aspects of hydro-meteorological investigation, which include estimation of long-term annual and seasonal rainfall departure, probability distribution analysis of annual and seasonal rainfall, analysis of annual and analysis of seasonal meteorological drought years for the

The objective of the present study was to delineate the mechanisms of guanylyl cyclase/natriureti... more The objective of the present study was to delineate the mechanisms of guanylyl cyclase/natriuretic peptide receptor-A (GC-A/NPRA) gene (Npr1) expression in vivo. We utilized all-trans retinoic acid (ATRA) and histone deacetylase (HDAC) inhibitor, sodium butyrate (NaBu) to examine the expression and function of Npr1 using gene-disrupted heterozygous (1-copy; +/-), wild-type (2-copy; +/+), and gene-duplicated heterozygous (3-copy; ++/+) mice. Npr1 +/mice exhibited increased renal HDAC and reduced histone acetyltransferase (HAT) activity; on the contrary Npr1 ++/+ mice showed decreased HDAC and enhanced HAT activity compared with Npr1 +/+ mice. ATRA and NaBu promoted global acetylation of histones H3-K9/14 and H4-K12, reduced methylation of H3-K9 and H3-K27, and enriched accumulation of active chromatin marks at the Npr1 promoter. A combination of ATRA-NaBu promoted recruitment of activator-complex containing Ets-1, retinoic acid receptor α , and HATs (p300 and p300/CBP associated factor) at the Npr1 promoter and significantly increased renal NPRA expression, GC activity, and cGMP levels. Untreated 1-copy mice showed significantly increased systolic blood pressure (SBP) and renal expression of α-smooth muscle actin (α-SMA) and proliferating cell nuclear antigen (PCNA) compared with 2-copy and 3-copy mice. Treatment with ATRA and NaBu synergistically attenuated the expression of α-SMA and PCNA and reduced SBP in Npr1 +/mice. Our findings demonstrate that epigenetic upregulation of Npr1 gene transcription by ATRA and NaBu leads to attenuation of renal fibrotic markers and SBP in mice with reduced Npr1 gene copy number, which will have important implications in prevention and treatment of hypertension-related renal pathophysiological conditions.

Supercapacitor (SC) also called ultracapacitor is an electrochemical energy storage device applie... more Supercapacitor (SC) also called ultracapacitor is an electrochemical energy storage device applied to store electrical charges and pulse power supply. It is expected that both energy and power density could be improved by making the SC composite structure using highly conducting materials multiwalled carbon nanotubes (MWCNTs) in activated carbon (AC). Also the performance of SC depends on some major factors of its electrode materials like high electrical conductivity, good mesoporocity, high specific surface area etc., so the structural and electrical study of MWCNTs incorporated in host activated carbon (AC) that forms nanocomposite prepared by a simple, low cost and environment friendly method has been reported. The structural properties of AC, MWCNTs and AC/MWCNTs have been examined by XRD, SEM and Raman spectroscopy. The enhancement of current in AC by adding MWCNTs has been analysed by current(I)-voltage(v) measurements. The observed results suggest that the prepared composite ...

International Journal of Innovative Research in Physics, 2021

Graphene is an excellent 2D material due to its exceptional electrical properties which can be po... more Graphene is an excellent 2D material due to its exceptional electrical properties which can be potentially used in optoelectronic. In order to use graphene in optoelectronics, the electrical properties need to be tuned. To tune electrical properties, few-layer graphene sheets (FLGS) prepared by electrochemical method have been used. The prepared FLGS has been characterized by Field Emission Scanning Electron Microscope (FESEM), Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), Ultraviolet-Visible Spectroscopy (UV-Vis), Fourier Transform Infrared (FTIR), and Raman Spectroscopy. The optimized FLGS by characterization has been employed to tune the electrical properties in the presence and absence of water drop under ultraviolet and visible light. The obtained current of FLGS thin film is ~ 0.8mA whereas; the measured current under ultraviolet light is ~ 1.7mA and under visible light ~ 1.07mA. However, it has been observed that the measured current has decreased to under ...

SSRN Electronic Journal, 2019

This paper presents the work done on the topic Design of Pressure Vessel as per ASME codes, using... more This paper presents the work done on the topic Design of Pressure Vessel as per ASME codes, using PV Elite. The pressure vessel considered here was operated previously at atmospheric pressure and has now to be operated at 3 kg/cm2, so using ASME Section VIII-Division I thickness of the pressure vessel wall was calculated for new operating pressure and checked whether the present wall thickness will sustain the new operating pressure. Introduction of manway results in certain area of the pressure vessel excluded, so this area of material taken out needs to be compensated using Rf-pad. Designing of this pressure vessel is carried out using PV Elite and results obtained here are used to check the calculations done using ASME Section VIII-Division I. Results obtained show that the present wall thickness will sustain the new operating pressure and introduction of manway uses Rf-pads for area compensation.

IOP Conference Series: Materials Science and Engineering, 2018

View the article online for updates and enhancements. Related content Synergetic effect of graphe... more View the article online for updates and enhancements. Related content Synergetic effect of graphene oxidecarbon nanotube on nanomechanical properties of acrylonitrile butadiene styrene nanocomposites Jeevan Jyoti, Bhanu Pratap Singh, Sreekumar Chockalingam et al.-Characterization of poly methyl methaacrylate and reduced graphene oxide composite for application as electrolyte in dye sensitized solar cells Roshan Shrivatsav, Vignesh Mahalingam, E R Lakshmi Narayanan et al.-An in situ Raman spectroscopy study of stress transfer between carbon nanotubes andpolymer Minfang Mu, Sebastian Osswald, Yury Gogotsi et al.

Sustainability, 2020

In this research article, we aim to study the proposed role of human–machine interactive (HMI) te... more In this research article, we aim to study the proposed role of human–machine interactive (HMI) technologies, including both artificial intelligence (AI) and virtual reality (VR)-enabled applications, for the post-COVID-19 revival of the already depleted tourism industry in Vietnam’s major tourist destination and business hub of Ho Chi Minh City. The researchers aim to gather practical knowledge regarding tourists’ intentions for such service enhancements, which may drive the sector to adopt a better conclusive growth pattern in post-COVID-19 times. In this study, we attempt to focus on travelers who look for paramount safety with the assurance of empathetic, personalized care in post-COVID-19 times. In the current study, the authors employ structural equation modeling to evaluate the intentions of tourists both structurally and empirically for destination tourism with data collected from tourists with previous exposure to various kinds of these devices. The study shows that human–ma...

The FASEB Journal, 2011

Inhaled nitric oxide (iNO) is used clinically to treat pulmonary hypertension in newborns, often ... more Inhaled nitric oxide (iNO) is used clinically to treat pulmonary hypertension in newborns, often in conjunction with hyperoxia (NO/O 2). Prolonged exposure to NO/O 2 causes synergistic lung injury and death of lung epithelial cells. To explore the mechanisms involved, oxygen-resistant HeLa-80 cells were exposed to NO ؎ O 2. Exposure to NO and O 2 induced a synergistic cytotoxicity, accompanied with apoptotic characteristics, including elevated caspase-3-like activity, Annexin V incorporation, and nuclear condensation. This apoptosis was associated with a synergistic suppression of NF-B activity. Cells lacking functional NF-B p65 subunit were more sensitive to NO/O 2 than their wild type counterparts. This injury was partially rescued by transfection with a p65 expression construct, suggesting an inverse relationship between NF-B and susceptibility to the cytotoxicity of NO/O 2. Despite the reduced NF-B activity in cells exposed to NO ؎ O 2 , IB␣ was degraded, suggesting that pathways regulating the steady-state levels of IB were not involved. However, exposure to NO/O 2 caused a marked reduction in nuclear localization and an increase in protein carbonyl formation of NF-B p65 subunit. These results suggest that NO/O 2induced apoptosis occurs by suppressing NF-B activity.

This study was conducted to monitor the changes in arsenic concentration during different seasons... more This study was conducted to monitor the changes in arsenic concentration during different seasons in a one-year period during 2002-2003 in selected tubewells in an arsenic-affected area in the district of South 24 Parganas in West Bengal, India, and to map the location of the wells. Seasonal variations in concentrations of arsenic in water were measured from 74 selected tubewells, ranging in depth from 40 to 500 feet. Water samples were collected from these wells during winter, summer, monsoon, and the following winter in 2002-2003. A global positioning system was used for locating the tubewells, and a geographic information system was used for mapping. There was evidence of seasonal variation in concentrations of arsenic in water (p=0.02) with the minimum average concentration occurring in the summer season (694 µg/L) and the maximum in the monsoon season (906 µg/L). From the winter of 2002 to the winter of 2003, arsenic concentrations increased, irrespective of the depth of the tu...

This study was conducted to assess the impact of merger and acquisition activities on the perform... more This study was conducted to assess the impact of merger and acquisition activities on the performance of Banks in India. The paper reviews the trends in M&A’s in Indian banking and then impact of M&A’s has been studied in three leading banks of India. The study covers the area of performance evaluation of M&A’s in Indian banking sector during the period pre and post period of six years of Merger and Acquisition activity. The paper studied the post-merger financial performance of merged banks with the help of financial parameters like, Net Profit margin, operating Profit margin, return on Capital Employed, Return on Equity, earnings per share, capital adequacy ratio, dividend per share etc. The findings indicated that strategies and policies in procedural, physical and socio-cultural contexts were very important factors in the post-merger and acquisition process. In addition, the qualitative impacts of the post M&A activities such as accounting reports, market valuations and key RESU...

The present study investigates the effectiveness of celebrity endorsements in print & social medi... more The present study investigates the effectiveness of celebrity endorsements in print & social media advertisements (Twitter, Instagram & Facebook) on buying behaviour of consumer. For the study purpose, consumer participants (Students who are using social media mostly) were divided into two groups. One section was exposed to celebrity endorsements in print advertisements and the other is to social media advertisements. Participants were exposed to 5 advertisements, one of which contained a celebrity brand endorsement, then they are asked to respond 11 credibility belief statements & were tested on their memorability of the celebrity endorsed advertisements. For all collective social media advertisements all the variables strictly significant, which means, social media advertisement appears to be more important when compared to print ads. Interestingly, though consumers do trust social media advertisements more but they might not rely on celebrities in ads. This appears to be RESUMEN:...

The current work employs silicon-based one dimensional photonic structure which delivers ‘20’ dif... more The current work employs silicon-based one dimensional photonic structure which delivers ‘20’ different types of monochromatic beams (wavelengths) via filtering action. The I/P signals are essentially varies from visible to short infrared range to justify the work. Though similar type of works related to filtering application are found in the literature, the present research deals with an output signal which could be deployed in different purposes vis-à-vis dentistry, dermatology, spectroscopy, printing, holography, barcode scanning etc. The physicality of this work incorporates 68 layers of silicon monoxide and silicon based one-dimensional optical waveguide along with their configuration where the plane wave expansion method does fulfill the nitty-gritty of required mathematics to solve out electromagnetic wave equations. Reflectance and transmittance characteristics along with the absorbance are the critical parameters that substantiate the said application.

Sustainability, 2020

This research discusses the role of Web 4.0 and 5.0 devices on the commercial sustainability for ... more This research discusses the role of Web 4.0 and 5.0 devices on the commercial sustainability for tourism in Ho Chi Minh City (HCMC), Vietnam. The study adopts a tourist perspective regarding the future implementation of Web 4.0 and 5.0 devices, focusing on the service quality of various tourism-associated services and assessing, in return, the extent to which the overall satisfaction and long-term patronage of tourists is affected. Usually, researchers conduct this test in various popular establishments where devices are intended for experimental use and tourists are supposed to have previous exposure to them, so that their perceptual thinking regarding the service quality of these devices can be studied. The tourists act as respondents for various establishments. We also asked subjective questions in a short interview to 10 professionals working in these establishments, which helped us in the quantitative survey process. As a mixed method study, it has covered both quantitative and...

The Handbook of Environmental Chemistry, 2020

Hydropower refers to energy conversion from flowing water into electricity. Due to water recyclin... more Hydropower refers to energy conversion from flowing water into electricity. Due to water recycling by the Sun, hydropower is widely accepted as a form of renewable energy. A sustainable project is possible only when there is appropriate planning, efficient system design to tackle societal and environmental issues, and continuous adaptation to changing conditions. It is important to update knowledge

Sustainability, 2020

Digital stores are spreading their tentacles slowly in Vietnam, the most upcoming economy of the ... more Digital stores are spreading their tentacles slowly in Vietnam, the most upcoming economy of the ASEAN region, so it is a relevant and contemporary study to know the perceptual thought and socioeconomic profiles of customers. Since there is a lack of independent study in this area, the relationships can be researched and presented. The context of digitization and consumerism is slowly growing in the Vietnamese market. So, this article studies the factors influencing online consumer perception and purchase orientation for digital stores operating in Vietnam through apps and websites. This study is a bi-phase study. In the first phase, constructs, such as digital store images, digital customer loyalty, satisfaction and digital socio-economic profiles of consumers, are examined. In the second part, the empirical analysis is carried by the authors. The study is done by SPSS 22, R studio, and R-cran software packages. Exploratory factor analysis, confirmatory factor analysis, very simple...

IEEE Transactions on Dielectrics and Electrical Insulation, 2017

Emphasis on renewable energy demands power transmission from scattered sources. Underground power... more Emphasis on renewable energy demands power transmission from scattered sources. Underground power transmission and distribution is the key way due to right of way (ROW) and smart city initiative. This is increasing the demand of subterranean cable networks, which is leading to the proportional increase in the installation of cable joints. Cable joint installation is a highly time consuming process requiring very high level of human skill in the form of preparing cable ends by cutting, shaping and polishing them with a very low tolerance, without which the joint becomes the weakest link in the cable network. In view of this rapid growth of joint installations, there is now a two pronged requirement of lowering of installation time and lowering of human skill requirement for cable joint installation. In the present study all the major time consuming steps in the joint installation have been identified. A critical re-look of this decades old process was carried out in terms of materials properties and their influence on the steps involved in the process. Subsequently, based on experiments we propose a novel modification of the cable joint installation process which will lead to a 30% reduction in the installation time with a concomitant reduction in the human skill requirement.

Peptides, 2019

The objective of the present study was to determifigne whether targeted-disruption of Npr1 gene (... more The objective of the present study was to determifigne whether targeted-disruption of Npr1 gene (encoding for guanylyl cyclase/natriuretic peptide receptor-A; GC-A/NPRA) upregulates pro(renin) receptor (P)RR expression and leads to the activation of MAPKs in Npr1 geneknockout mice. The Npr1 homozygous (Npr1 −/− ; 0-copy), heterozygous (Npr1 +/− ; 1-copy), wildtype (Npr1 +/+ ; 2-copy), and gene-duplicated (Npr1 ++/++ ; 4-copy) mice were utilized. To identify the canonical pathway of (P)RR, we administered ACE-1 inhibitor (captopril), AT1R blocker (losartan), and MAPKs inhibitors (U0126 and SB203580) to all Npr1 mice genotypes. The renal expression of (P)RR mRNA was increased by 3-fold in 0-copy mice and 2-fold in 1-copy mice compared with 2-copy mice, which was also associated with significantly increased expression of ACE-1 and AT1R mRNA levels. Similarly, the phosphorylation of MAPKs (Erk1/2 and p-p38) was enhanced by 3.5-fold and 3.2-fold, respectively, in 0-copy mice with significant increases in 1-copy mice compared with 2-copy mice. The kidney and plasma levels of proinflammatory cytokines were significantly elevated in 0-copy and 1-copy mice. Treatment with captopril and losartan did not alter the expression of (P)RR in any of the Npr1 mice genotypes. Interestingly, losartan significantly reduced the phosphorylation of Erk1/2 and p38 in Npr1 mice. The present results suggest that the ablation of Npr1 upregulates (P)RR, MAPKs (Erk1/2 and p38), and proinflammatory cytokines in 0-copy and 1-copy mice. In contrast, the duplication of Npr1 exhibits the anti-inflammatory and antihypertensive effects by reducing the activation of MAPKs and inhibiting the expression levels of RAAS components and proinflammatory cytokines.

Journal of Electronic Materials

We prepared a composite using activated carbon and functionalised multiwalled carbon nanotubes by... more We prepared a composite using activated carbon and functionalised multiwalled carbon nanotubes by a simple and cost-effective process and investigated its use for supercapacitor application. The electrochemical performance of the prepared composite has been investigated by galvanostatic charge-discharge (GCD) and cyclic voltammetry (CV) measurements in a three-electrode setup. The composite resulted in maximum specific capacitance of 395 F/g at 5 mV/s as measured by CV, and of 372 F/g at 60 A/g by GCD measurement in 3M KOH aqueous electrolyte. High power and energy density of 75.27 kW/kg and 25.31 WAEh/kg at 60 A/g have been respectively obtained for composite using GCD measurement. The long-term charge-discharge stability has been performed for the composite electrodes, and it is observed that 89% of capacitance is retained even after 5000 cycles. The achieved results suggest that the prepared activated carbon/multiwalled carbon nanotube composite can be a potential electrode material in high-performance supercapacitors for energy storage applications.

Journal of Pharmacognosy and Phytochemistry, 2019

The present study was carried out at Rispana River milli watershed located in Uttarakhand state. ... more The present study was carried out at Rispana River milli watershed located in Uttarakhand state. The Rispana river which is a tributaries of Ganga, flows from Mussoorie and passes through Dehradun. Rispana river catchment in different aspects of hydro-meteorological investigation, which include estimation of long-term annual and seasonal rainfall departure, probability distribution analysis of annual and seasonal rainfall, analysis of annual and analysis of seasonal meteorological drought years for the

The objective of the present study was to delineate the mechanisms of guanylyl cyclase/natriureti... more The objective of the present study was to delineate the mechanisms of guanylyl cyclase/natriuretic peptide receptor-A (GC-A/NPRA) gene (Npr1) expression in vivo. We utilized all-trans retinoic acid (ATRA) and histone deacetylase (HDAC) inhibitor, sodium butyrate (NaBu) to examine the expression and function of Npr1 using gene-disrupted heterozygous (1-copy; +/-), wild-type (2-copy; +/+), and gene-duplicated heterozygous (3-copy; ++/+) mice. Npr1 +/mice exhibited increased renal HDAC and reduced histone acetyltransferase (HAT) activity; on the contrary Npr1 ++/+ mice showed decreased HDAC and enhanced HAT activity compared with Npr1 +/+ mice. ATRA and NaBu promoted global acetylation of histones H3-K9/14 and H4-K12, reduced methylation of H3-K9 and H3-K27, and enriched accumulation of active chromatin marks at the Npr1 promoter. A combination of ATRA-NaBu promoted recruitment of activator-complex containing Ets-1, retinoic acid receptor α , and HATs (p300 and p300/CBP associated factor) at the Npr1 promoter and significantly increased renal NPRA expression, GC activity, and cGMP levels. Untreated 1-copy mice showed significantly increased systolic blood pressure (SBP) and renal expression of α-smooth muscle actin (α-SMA) and proliferating cell nuclear antigen (PCNA) compared with 2-copy and 3-copy mice. Treatment with ATRA and NaBu synergistically attenuated the expression of α-SMA and PCNA and reduced SBP in Npr1 +/mice. Our findings demonstrate that epigenetic upregulation of Npr1 gene transcription by ATRA and NaBu leads to attenuation of renal fibrotic markers and SBP in mice with reduced Npr1 gene copy number, which will have important implications in prevention and treatment of hypertension-related renal pathophysiological conditions.

Supercapacitor (SC) also called ultracapacitor is an electrochemical energy storage device applie... more Supercapacitor (SC) also called ultracapacitor is an electrochemical energy storage device applied to store electrical charges and pulse power supply. It is expected that both energy and power density could be improved by making the SC composite structure using highly conducting materials multiwalled carbon nanotubes (MWCNTs) in activated carbon (AC). Also the performance of SC depends on some major factors of its electrode materials like high electrical conductivity, good mesoporocity, high specific surface area etc., so the structural and electrical study of MWCNTs incorporated in host activated carbon (AC) that forms nanocomposite prepared by a simple, low cost and environment friendly method has been reported. The structural properties of AC, MWCNTs and AC/MWCNTs have been examined by XRD, SEM and Raman spectroscopy. The enhancement of current in AC by adding MWCNTs has been analysed by current(I)-voltage(v) measurements. The observed results suggest that the prepared composite ...

International Journal of Innovative Research in Physics, 2021

Graphene is an excellent 2D material due to its exceptional electrical properties which can be po... more Graphene is an excellent 2D material due to its exceptional electrical properties which can be potentially used in optoelectronic. In order to use graphene in optoelectronics, the electrical properties need to be tuned. To tune electrical properties, few-layer graphene sheets (FLGS) prepared by electrochemical method have been used. The prepared FLGS has been characterized by Field Emission Scanning Electron Microscope (FESEM), Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), Ultraviolet-Visible Spectroscopy (UV-Vis), Fourier Transform Infrared (FTIR), and Raman Spectroscopy. The optimized FLGS by characterization has been employed to tune the electrical properties in the presence and absence of water drop under ultraviolet and visible light. The obtained current of FLGS thin film is ~ 0.8mA whereas; the measured current under ultraviolet light is ~ 1.7mA and under visible light ~ 1.07mA. However, it has been observed that the measured current has decreased to under ...

SSRN Electronic Journal, 2019

This paper presents the work done on the topic Design of Pressure Vessel as per ASME codes, using... more This paper presents the work done on the topic Design of Pressure Vessel as per ASME codes, using PV Elite. The pressure vessel considered here was operated previously at atmospheric pressure and has now to be operated at 3 kg/cm2, so using ASME Section VIII-Division I thickness of the pressure vessel wall was calculated for new operating pressure and checked whether the present wall thickness will sustain the new operating pressure. Introduction of manway results in certain area of the pressure vessel excluded, so this area of material taken out needs to be compensated using Rf-pad. Designing of this pressure vessel is carried out using PV Elite and results obtained here are used to check the calculations done using ASME Section VIII-Division I. Results obtained show that the present wall thickness will sustain the new operating pressure and introduction of manway uses Rf-pads for area compensation.

IOP Conference Series: Materials Science and Engineering, 2018

View the article online for updates and enhancements. Related content Synergetic effect of graphe... more View the article online for updates and enhancements. Related content Synergetic effect of graphene oxidecarbon nanotube on nanomechanical properties of acrylonitrile butadiene styrene nanocomposites Jeevan Jyoti, Bhanu Pratap Singh, Sreekumar Chockalingam et al.-Characterization of poly methyl methaacrylate and reduced graphene oxide composite for application as electrolyte in dye sensitized solar cells Roshan Shrivatsav, Vignesh Mahalingam, E R Lakshmi Narayanan et al.-An in situ Raman spectroscopy study of stress transfer between carbon nanotubes andpolymer Minfang Mu, Sebastian Osswald, Yury Gogotsi et al.

Sustainability, 2020

In this research article, we aim to study the proposed role of human–machine interactive (HMI) te... more In this research article, we aim to study the proposed role of human–machine interactive (HMI) technologies, including both artificial intelligence (AI) and virtual reality (VR)-enabled applications, for the post-COVID-19 revival of the already depleted tourism industry in Vietnam’s major tourist destination and business hub of Ho Chi Minh City. The researchers aim to gather practical knowledge regarding tourists’ intentions for such service enhancements, which may drive the sector to adopt a better conclusive growth pattern in post-COVID-19 times. In this study, we attempt to focus on travelers who look for paramount safety with the assurance of empathetic, personalized care in post-COVID-19 times. In the current study, the authors employ structural equation modeling to evaluate the intentions of tourists both structurally and empirically for destination tourism with data collected from tourists with previous exposure to various kinds of these devices. The study shows that human–ma...

The FASEB Journal, 2011

Inhaled nitric oxide (iNO) is used clinically to treat pulmonary hypertension in newborns, often ... more Inhaled nitric oxide (iNO) is used clinically to treat pulmonary hypertension in newborns, often in conjunction with hyperoxia (NO/O 2). Prolonged exposure to NO/O 2 causes synergistic lung injury and death of lung epithelial cells. To explore the mechanisms involved, oxygen-resistant HeLa-80 cells were exposed to NO ؎ O 2. Exposure to NO and O 2 induced a synergistic cytotoxicity, accompanied with apoptotic characteristics, including elevated caspase-3-like activity, Annexin V incorporation, and nuclear condensation. This apoptosis was associated with a synergistic suppression of NF-B activity. Cells lacking functional NF-B p65 subunit were more sensitive to NO/O 2 than their wild type counterparts. This injury was partially rescued by transfection with a p65 expression construct, suggesting an inverse relationship between NF-B and susceptibility to the cytotoxicity of NO/O 2. Despite the reduced NF-B activity in cells exposed to NO ؎ O 2 , IB␣ was degraded, suggesting that pathways regulating the steady-state levels of IB were not involved. However, exposure to NO/O 2 caused a marked reduction in nuclear localization and an increase in protein carbonyl formation of NF-B p65 subunit. These results suggest that NO/O 2induced apoptosis occurs by suppressing NF-B activity.

This study was conducted to monitor the changes in arsenic concentration during different seasons... more This study was conducted to monitor the changes in arsenic concentration during different seasons in a one-year period during 2002-2003 in selected tubewells in an arsenic-affected area in the district of South 24 Parganas in West Bengal, India, and to map the location of the wells. Seasonal variations in concentrations of arsenic in water were measured from 74 selected tubewells, ranging in depth from 40 to 500 feet. Water samples were collected from these wells during winter, summer, monsoon, and the following winter in 2002-2003. A global positioning system was used for locating the tubewells, and a geographic information system was used for mapping. There was evidence of seasonal variation in concentrations of arsenic in water (p=0.02) with the minimum average concentration occurring in the summer season (694 µg/L) and the maximum in the monsoon season (906 µg/L). From the winter of 2002 to the winter of 2003, arsenic concentrations increased, irrespective of the depth of the tu...

This study was conducted to assess the impact of merger and acquisition activities on the perform... more This study was conducted to assess the impact of merger and acquisition activities on the performance of Banks in India. The paper reviews the trends in M&A’s in Indian banking and then impact of M&A’s has been studied in three leading banks of India. The study covers the area of performance evaluation of M&A’s in Indian banking sector during the period pre and post period of six years of Merger and Acquisition activity. The paper studied the post-merger financial performance of merged banks with the help of financial parameters like, Net Profit margin, operating Profit margin, return on Capital Employed, Return on Equity, earnings per share, capital adequacy ratio, dividend per share etc. The findings indicated that strategies and policies in procedural, physical and socio-cultural contexts were very important factors in the post-merger and acquisition process. In addition, the qualitative impacts of the post M&A activities such as accounting reports, market valuations and key RESU...

The present study investigates the effectiveness of celebrity endorsements in print & social medi... more The present study investigates the effectiveness of celebrity endorsements in print & social media advertisements (Twitter, Instagram & Facebook) on buying behaviour of consumer. For the study purpose, consumer participants (Students who are using social media mostly) were divided into two groups. One section was exposed to celebrity endorsements in print advertisements and the other is to social media advertisements. Participants were exposed to 5 advertisements, one of which contained a celebrity brand endorsement, then they are asked to respond 11 credibility belief statements & were tested on their memorability of the celebrity endorsed advertisements. For all collective social media advertisements all the variables strictly significant, which means, social media advertisement appears to be more important when compared to print ads. Interestingly, though consumers do trust social media advertisements more but they might not rely on celebrities in ads. This appears to be RESUMEN:...

The current work employs silicon-based one dimensional photonic structure which delivers ‘20’ dif... more The current work employs silicon-based one dimensional photonic structure which delivers ‘20’ different types of monochromatic beams (wavelengths) via filtering action. The I/P signals are essentially varies from visible to short infrared range to justify the work. Though similar type of works related to filtering application are found in the literature, the present research deals with an output signal which could be deployed in different purposes vis-à-vis dentistry, dermatology, spectroscopy, printing, holography, barcode scanning etc. The physicality of this work incorporates 68 layers of silicon monoxide and silicon based one-dimensional optical waveguide along with their configuration where the plane wave expansion method does fulfill the nitty-gritty of required mathematics to solve out electromagnetic wave equations. Reflectance and transmittance characteristics along with the absorbance are the critical parameters that substantiate the said application.

Sustainability, 2020

This research discusses the role of Web 4.0 and 5.0 devices on the commercial sustainability for ... more This research discusses the role of Web 4.0 and 5.0 devices on the commercial sustainability for tourism in Ho Chi Minh City (HCMC), Vietnam. The study adopts a tourist perspective regarding the future implementation of Web 4.0 and 5.0 devices, focusing on the service quality of various tourism-associated services and assessing, in return, the extent to which the overall satisfaction and long-term patronage of tourists is affected. Usually, researchers conduct this test in various popular establishments where devices are intended for experimental use and tourists are supposed to have previous exposure to them, so that their perceptual thinking regarding the service quality of these devices can be studied. The tourists act as respondents for various establishments. We also asked subjective questions in a short interview to 10 professionals working in these establishments, which helped us in the quantitative survey process. As a mixed method study, it has covered both quantitative and...

The Handbook of Environmental Chemistry, 2020

Hydropower refers to energy conversion from flowing water into electricity. Due to water recyclin... more Hydropower refers to energy conversion from flowing water into electricity. Due to water recycling by the Sun, hydropower is widely accepted as a form of renewable energy. A sustainable project is possible only when there is appropriate planning, efficient system design to tackle societal and environmental issues, and continuous adaptation to changing conditions. It is important to update knowledge

Sustainability, 2020

Digital stores are spreading their tentacles slowly in Vietnam, the most upcoming economy of the ... more Digital stores are spreading their tentacles slowly in Vietnam, the most upcoming economy of the ASEAN region, so it is a relevant and contemporary study to know the perceptual thought and socioeconomic profiles of customers. Since there is a lack of independent study in this area, the relationships can be researched and presented. The context of digitization and consumerism is slowly growing in the Vietnamese market. So, this article studies the factors influencing online consumer perception and purchase orientation for digital stores operating in Vietnam through apps and websites. This study is a bi-phase study. In the first phase, constructs, such as digital store images, digital customer loyalty, satisfaction and digital socio-economic profiles of consumers, are examined. In the second part, the empirical analysis is carried by the authors. The study is done by SPSS 22, R studio, and R-cran software packages. Exploratory factor analysis, confirmatory factor analysis, very simple...

IEEE Transactions on Dielectrics and Electrical Insulation, 2017

Emphasis on renewable energy demands power transmission from scattered sources. Underground power... more Emphasis on renewable energy demands power transmission from scattered sources. Underground power transmission and distribution is the key way due to right of way (ROW) and smart city initiative. This is increasing the demand of subterranean cable networks, which is leading to the proportional increase in the installation of cable joints. Cable joint installation is a highly time consuming process requiring very high level of human skill in the form of preparing cable ends by cutting, shaping and polishing them with a very low tolerance, without which the joint becomes the weakest link in the cable network. In view of this rapid growth of joint installations, there is now a two pronged requirement of lowering of installation time and lowering of human skill requirement for cable joint installation. In the present study all the major time consuming steps in the joint installation have been identified. A critical re-look of this decades old process was carried out in terms of materials properties and their influence on the steps involved in the process. Subsequently, based on experiments we propose a novel modification of the cable joint installation process which will lead to a 30% reduction in the installation time with a concomitant reduction in the human skill requirement.

Peptides, 2019

The objective of the present study was to determifigne whether targeted-disruption of Npr1 gene (... more The objective of the present study was to determifigne whether targeted-disruption of Npr1 gene (encoding for guanylyl cyclase/natriuretic peptide receptor-A; GC-A/NPRA) upregulates pro(renin) receptor (P)RR expression and leads to the activation of MAPKs in Npr1 geneknockout mice. The Npr1 homozygous (Npr1 −/− ; 0-copy), heterozygous (Npr1 +/− ; 1-copy), wildtype (Npr1 +/+ ; 2-copy), and gene-duplicated (Npr1 ++/++ ; 4-copy) mice were utilized. To identify the canonical pathway of (P)RR, we administered ACE-1 inhibitor (captopril), AT1R blocker (losartan), and MAPKs inhibitors (U0126 and SB203580) to all Npr1 mice genotypes. The renal expression of (P)RR mRNA was increased by 3-fold in 0-copy mice and 2-fold in 1-copy mice compared with 2-copy mice, which was also associated with significantly increased expression of ACE-1 and AT1R mRNA levels. Similarly, the phosphorylation of MAPKs (Erk1/2 and p-p38) was enhanced by 3.5-fold and 3.2-fold, respectively, in 0-copy mice with significant increases in 1-copy mice compared with 2-copy mice. The kidney and plasma levels of proinflammatory cytokines were significantly elevated in 0-copy and 1-copy mice. Treatment with captopril and losartan did not alter the expression of (P)RR in any of the Npr1 mice genotypes. Interestingly, losartan significantly reduced the phosphorylation of Erk1/2 and p38 in Npr1 mice. The present results suggest that the ablation of Npr1 upregulates (P)RR, MAPKs (Erk1/2 and p38), and proinflammatory cytokines in 0-copy and 1-copy mice. In contrast, the duplication of Npr1 exhibits the anti-inflammatory and antihypertensive effects by reducing the activation of MAPKs and inhibiting the expression levels of RAAS components and proinflammatory cytokines.