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Simple Synthesis Of Graphitic Carbon Nitride Based Composite For Heavy Metals Removal From Water
Janardhan Reddy Koduru(Koduru Janardhan Reddy),Zahid Husain Momin,Lakshmi Prasanna Lingamdinne,Ganesh Kumar Reddy Angaru,Yoon-Young Chang(장윤영),Jae-Kyu Yang(양재규) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11
Koduru, Janardhan Reddy,Kailasa, Suresh Kumar,Bhamore, Jigna R.,Kim, Ki-Hyun,Dutta, Tanushree,Vellingiri, Kowsalya Elsevier 2018 Advances in colloid and interface science Vol.256 No.-
<P>Silver nanoparticles (Ag NPs) have recently emerged as promising materials in the biomedical sciences because of their antimicrobial activities towards a wide variety of microorganisms. Nanomaterial-based drug delivery systems with antimicrobial activity are critical as they may lead to novel treatments for cutaneous pathogens. In this review, we explore the recent progress on phytochemical-mediated synthesis of Ag NPs for antimicrobial treatment and associated infectious diseases. We discuss the biological activity of Ag NPs including mechanisms, antimicrobial activity, and antifungal/antiviral effects towards various microorganisms. The advent of Ag NP-based nanocarriers and nano-vehicles is also described for treatment of different diseases, along with the mechanisms of microbial inhibition. Overall, this review will provide a rational vision of the main achievements of Ag NPs as nanocarriers for inhibition of various microbial agents (bacteria, fungus, and virus). (C) 2018 Elsevier B.V. All rights reserved.</P>
Gorti Janardhan,Kaushal Kishore,Goutam Mukhopadhyay,Krishna Dutta 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.9
This study aims to investigate the influence of nugget diameter on tensile-shear and fatigue properties of the dissimilar resistancespot-welded joints of interstitial free and high strength niobium microalloyed steel sheets. The spot-weldings are doneat currents of 7 kA and 9 kA at welding time of 300 ms with electrode force of 2.6 kN. Fatigue tests are done at different loadamplitudes, considering the maximum tensile-shear load bearing capacity of the joints. The tests are interrupted before thefinal failure to understand the crack initiation and propagation paths. The study is supplemented by the microstructural anddetailed fractographic analyses. The results indicated that the fatigue strength of the spot-welds increased with a decrease innugget diameter. This could be attributed to the higher microhardness of heat affected zone (HAZ), presence of compressiveresidual stress and lower variation in thickness reduction on the IF steel side, welded at 7 kA. However, the tensile-shearload bearing capacity of the spot-welds increased with increase in the nugget diameter. The failure of the spot-welded jointunder static loading initiates from the HAZ/base metal interface of the IF steel side. Nevertheless, under cyclic loading crackinitiates from the notch root at the interface of two sheets lying in the HAZ of IF steel side. Fractographic investigationsindicate intergranular fracture features in combination with striations, secondary cracks on the IF steel side under cyclicloading. Fracture surfaces of the specimens failed under static loading shows however, shear dimples on the IF steel side.
Koduru, Janardhan Reddy,Chang, Yoon-Young,Kim, Im-Soon Asian Journal of Chemistry 2014 Asian Journal of Chemistry Vol.26 No.1
<P>Biosorption is an ecofriendly wastewater treatment technique with high efficiency and low operating cost involving simple procedure for the removal and recovery of heavy metal ions from aqueous media. In present investigation, Schizandra chinesis fruit peel powder was utilized as biosorbent for the removal of Co(II) from aqueous media. The biosorbent was characterized by using Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray techniques analysis. From FT-IR analysis it was found that hydroxyl, methoxy and carbonyl groups are involved in the removal of Co(II) from aqueous environment. The effect of various parameters for Co(II) removal by using Schizandra chinesis fruit peel powder are evaluated in batch biosorption method. Biosorption kinetics data was evaluated with kinetic models and the kinetic data was well fitted with pseudo-second-order kinetic model. The equilibrium data was in tune with the Langmuir isotherm model by revealing the maximum sorption capacity of 9.47 mg g(-1) at pH 6.5, contact time 40 min. This study demonstrated that the Schizandra chinesis fruit peel powder biosorbent was a promising, efficient, economic and biodegradable sorbent.</P>
Numerical modelling of shelter effect of porous wind fences
Prashanth Janardhan,Harish Narayana 한국풍공학회 2019 Wind and Structures, An International Journal (WAS Vol.29 No.5
The wind blowing at high velocity in an open storage yard leads to wind erosion and loss of material. Fence structures can be constructed around the periphery of the storage yard to reduce the erosion. The fence will cause turbulence and recirculation behind it which can be utilized to reduce the wind erosion and loss of material. A properly designed fence system will produce lesser turbulence and longer shelter effect. This paper aims to show the applicability of Support Vector Machine (SVM) to predict the recirculation length. A SVM model was built, trained and tested using the experimental data gathered from the literature. The newly developed model is compared with numerical turbulence model, in particular, modified k-ε model along with the experimental results. From the results, it was observed that the SVM model has a better capability in predicting the recirculation length. The SVM model was able to predict the recirculation length at a lesser time as compared to modified k-ε model. All the results are analyzed in terms of statistical measures, such as root mean square error, correlation coefficient, and scatter index. These examinations demonstrate that SVM has a strong potential as a feasible tool for predicting recirculation length.
Shubha Janardhan,Jayanthi Venkataraman,Suptendra Nath Sarbadhikari The Pacific Early Childhood Education Research Ass 2021 Asia-Pacific journal of research in early childhoo Vol.15 No.2
An Early Childhood Care and Education (ECCE) program in rural India was evaluated in terms of care and learning outcomes of children. The study was undertaken to observe and describe the ECCE system for children who were economically and educationally disadvantaged and enrolled in three Government Primary Schools (GPS) in India. In particular, the study tries to answer the question, ‘What factors affect the learning of Mathematics and English in the primary schools of rural Tamil Nadu?’ This Observational study was undertaken over a six-month period. The study included 183 children from LKG to Class 3 in normative stages of development as per their age and stage requirements. The parameters that were observed included learning outcomes in Math, English, Science and Social studies. An innovative daily baseline assessment was undertaken over a three-month period to understand children’s learning milestones. Results indicate that the learning outcomes were deplorably poor by Indian and international standards of education. Many challenges still remain in helping children gain a healthy start to life. There is a lack of an integrated framework that combines both health & well-being and learning. In the COVID-19 pandemic era, it is critical to move away from the traditional physical center models to a more hybrid scientific and technology driven systems for scale that are financially viable. These require a planned approach for introduction considering the scale in which it has to be implemented in India. Such plans need to be both top-down and bottom-up approach which entail large up-front investment in communicating and educating all the stakeholders. Personalized attention is not possible in traditional systems catering to such a large population. Additionally, and more importantly, there are no early warning mechanisms in place to help identify issues when it matters the most. Our analysis supports our research question and proves our hypotheses.
Effects of human growth hormone on gonadotropin-releasing hormone neurons in mice
Bhattarai, Janardhan P.,Kim, Shin-Hye,Han, Seong-Kyu,Park, Mi-Jung The Korean Pediatric Society 2010 Clinical and Experimental Pediatrics (CEP) Vol.53 No.9
Purpose: Recombinant human growth hormone (rhGH) has been widely used to treat short stature. However, there are some concerns that growth hormone treatment may induce skeletal maturation and early onset of puberty. In this study, we investigated whether rhGH can directly affect the neuronal activities of of gonadotropin-releasing hormone (GnRH). Methods: We performed brain slice gramicidin-perforated current clamp recording to examine the direct membrane effects of rhGH on GnRH neurons, and a whole-cell voltage-clamp recording to examine the effects of rhGH on spontaneous postsynaptic events and holding currents in immature (postnatal days 13-21) and adult (postnatal days 42-73) mice. Results: In immature mice, all 5 GnRH neurons recorded in gramicidin-perforated current clamp mode showed no membrane potential changes on application of rhGH (0.4, $1{\mu}g/mL$). In adult GnRH neurons, 7 (78%) of 9 neurons tested showed no response to rhGH ($0.2-1{\mu}g/mL$) and 2 neurons showed slight depolarization. In 9 (90%) of 10 immature neurons tested, rhGH did not induce any membrane holding current changes or spontaneous postsynaptic currents (sPSCs). There was no change in sPSCs and holding current in 4 of 5 adult GnRH neurons. Conclusion: These findings demonstrate that rhGH does not directly affect the GnRH neuronal activities in our experimental model.