UV-Promoted Metal- and Photocatalyst-Free Direct Conversion of Aromatic Aldehydes to Nitriles
aldehydes; catalyst-free; green chemical synthesis; nitriles; UV light
Abstract: An efficient, simple, and catalyst-free UV-induced functional group transformation of aromatic aldehydes to nitriles has been reported. The developed strategy delivers various functionalized aromatic nitriles with high yields and purity. The UV irradiation activates the carbonyl group of aldehydes and leads to the formation of aldoxime intermediate, further resulting in the generation of nitriles. The striking highlights of the reported methodology are simple reaction conditions, good yields, UV-promoted transformation, and catalyst-free synthesis. Due to the above-mentioned advantages, the methodology provides a whip hand toward environmentally friendly chemical synthesis. 2022, Pleiades Publishing, Ltd.
Joy F.; Peter F.; Gokul P.C.; Nizam A.; Chinnam S.
Russian Journal of Organic Chemistry, Vol-58, No. 3, pp. 379-384.
Joy F., Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, 560029, India; Peter F., Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, 560029, India; Gokul P.C., Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, 560029, India; Nizam A., Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, 560029, India; Chinnam S., Department of Chemistry, B.M.S. College of Engineering, Bengaluru, 560019, India
UVIT data release version 7: Regenerated high-level UVIT data products
astrometry; methods: data analysis; techniques: image processing; Ultraviolet: general
Ultra-Violet Imaging Telescope (UVIT) on board AstroSat is an active telescope capable of high-resolution far-ultraviolet imaging (<1.5??) and low-resolution (?/???100) slitless spectroscopy with a field-of-view as large as ? 0.5?. Now almost a decade old, UVIT continues to be operational and generates valuable data for the scientific community. UVIT is also capable of near-ultraviolet imaging (<1.5??); however, the near-ultraviolet channel stopped working in August 2018 after providing data for nearly 3years. This paper gives an overview of the latest version (7.0.1) of the UVIT pipeline and UVIT data release version 7. The high-level products generated using pipeline versions having a major ver. no. 7 will be called UVIT data release version 7. The latest pipeline version overcomes two limitations of the previous version (6.3), namely: (a) inability to combine all episode-wise images; and (b) failure of the astrometry module in a large fraction of the observations. The procedures adopted to overcome these two limitations as well as a comparison of the performance of this new version over the previous one, are presented in this paper. The UVIT data release version 7 products are available at the Indian Space Science Data Center of the Indian Space Research Organization for archival and dissemination from 1 June 2024. New pipeline version is open source and made available on GitHub. Indian Academy of Sciences 2025.
JOSEPH, PRAJWEL; TANDON, S.N.; GHOSH, S.K.; STALIN, C.S.
Journal of Astrophysics and Astronomy;Volume;46;Issue;2;Article No.;41;
Restricted Access; Hardcopy may be available in the library
https://doi.org/10.1007/s12036-025-10069-5 https://www.scopus.com/pages/publications/105009537286?origin=resultslist
JOSEPH P., Indian Institute of Astrophysics, Bangalore, 560034, India, Department of Physics and Electronics, Christ University (deemed to be University), Bangalore, 560029, India; TANDON S.N., Inter-University Centre for Astronomy and Astrophysics, Pune, 411007, India; GHOSH S.K., Tata Institute of Fundamental Research, Mumbai, 400005, India; STALIN C.S., Indian Institute of Astrophysics, Bangalore, 560034, India
UVIT Observations of the Small Magellanic Cloud: Point-source Catalog
Three fields in the outskirts of the Small Magellanic Cloud were observed by the UltraViolet Imaging Telescope (UVIT) on board AstroSat, between 2017 December 31 and 2018 January 1. The observations were carried out on a total of seven filters, three in the far-ultraviolet (FUV; 1300-1800 band and four in the near-ultraviolet (NUV; 2000-3000 band. We carried out photometry of these observations that have a spatial resolution better than 1.?5. We present here the first results of this work, which is a matched catalog of 11,241 sources detected in three FUV and four NUV wavelengths. We make the catalog available online, which would be of use to the astronomical community to address a wide variety of astrophysical problems. We provide an expression to estimate the total count rate in the full point-spread function of UVIT that also incorporates the effect of saturation. 2023. The Author(s). Published by the American Astronomical Society.
Devaraj A.; Joseph P.; Stalin C.S.; Tandon S.N.; Ghosh S.K.
All Open Access; Gold Open Access; Green Open Access
https://doi.org/10.3847/1538-4357/acba9c https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151872650&doi=10.3847%2f1538-4357%2facba9c&partnerID=40&md5=aace68d8455cccc275c9454990e1dfbb
Devaraj A., Indian Institute of Astrophysics, Karnataka, Bangalore, 560034, India, Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Joseph P., Indian Institute of Astrophysics, Karnataka, Bangalore, 560034, India, Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Stalin C.S., Indian Institute of Astrophysics, Karnataka, Bangalore, 560034, India; Tandon S.N., Inter-University Center for Astronomy and Astrophysics, Maharashtra, Pune, 411007, India; Ghosh S.K., Tata Institute of Fundamental Research, Maharashtra, Mumbai, 400005, India
UVIT observations of the star-forming ring in NGC 7252: Evidence of possible AGN feedback suppressing central star formation
Galaxies: elliptical and lenticular, cD; Galaxies: evolution; Galaxies: formation; Galaxies: nuclei; Galaxies: star formation; Ultraviolet: galaxies
Context. Some post-merger galaxies are known to undergo a starburst phase that quickly depletes the gas reservoir and turns it into a red-sequence galaxy, though the details are still unclear. Aims. Here we explore the pattern of recent star formation in the central region of the post-merger galaxy NGC 7252 using high-resolution ultraviolet (UV) images from the UVIT on ASTROSAT. Methods. The UVIT images with 1.2 and 1.4 arcsec resolution in the FUV and NUV are used to construct a FUV-NUV colour map of the central region. Results. The FUV-NUV pixel colour map for this canonical post-merger galaxy reveals a blue circumnuclear ring of diameter ?10?? (3.2 kpc) with bluer patches located over the ring. Based on a comparison to single stellar population models, we show that the ring is comprised of stellar populations with ages ? 300 Myr, with embedded star-forming clumps of younger age (? 150Myr). Conclusions. The suppressed star formation in the central region, along with the recent finding of a large amount of ionised gas, leads us to speculate that this ring may be connected to past feedback from a central super-massive black hole that has ionised the hydrogen gas in the central ?4?? ?1.3 kpc. ESO 2018.
George K.; Joseph P.; Mondal C.; Devaraj A.; Subramaniam A.; Stalin C.S.; CP.; Ghosh S.K.; Hutchings J.B.; Mohan R.; Postma J.; Sankarasubramanian K.; Sreekumar P.; Tandon S.N.
All Open Access; Bronze Open Access; Green Open Access
George K., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Joseph P., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India, Department of Physics, Christ University, Bangalore, India; Mondal C., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Devaraj A., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Subramaniam A., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Stalin C.S., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; CP., National Research Council of Canada, Herzberg Astronomy and Astrophysics Research Centre, Victoria, Canada; Ghosh S.K., National Centre for Radio Astrophysics, Pune, India, Tata Institute of Fundamental Research, Mumbai, India; Hutchings J.B., National Research Council of Canada, Herzberg Astronomy and Astrophysics Research Centre, Victoria, Canada; Mohan R., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Postma J., University of Calgary, Calgary, AB, Canada; Sankarasubramanian K., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India, ISRO Satellite Centre, HAL Airport Road, Bangalore, India; Sreekumar P., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Tandon S.N., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India, Inter-University Center for Astronomy and Astrophysics, Pune, India
UVIT view of Centaurus A: A detailed study on positive AGN feedback
galaxies: jets; galaxies: star formation; ultraviolet: galaxies
Supermassive black holes at the centre of active galactic nuclei (AGNs) produce relativistic jets that can affect the star formation characteristics of the AGN hosts. Observations in the ultraviolet (UV) band can provide an excellent view of the effect of AGN jets on star formation. Here, we present a census of star formation properties in the Northern Star-forming Region (NSR) that spans about 20 kpc of the large radio source Centaurus A hosted by the giant elliptical galaxy NGC 5128. In this region, we identified 352 UV sources associated with Cen A using new observations at an angular resolution of <1.5 arcsec observed with the Ultra-Violet Imaging Telescope (UVIT) onboard AstroSat. These observations were carried out in one far-ultraviolet (FUV; ?mean = 1481 and three near-ultraviolet (NUV; with ?mean of 2196, 2447, and 2792 respectively) bands. The star-forming sources identified in UV tend to lie in the direction of the jet of Cen A, thereby suggesting jet triggering of star formation. Separating the NSR into Outer and Inner regions, we found the stars in the Inner region to have a relatively younger age than the Outer region, suggesting that the two regions may have different star formation histories. We also provide the UVIT source catalogue in the NSR. 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
Joseph P.; Sreekumar P.; Stalin C.S.; Paul K.T.; Mondal C.; George K.; Mathew B.
Monthly Notices of the Royal Astronomical Society, Vol-516, No. 2, pp. 2300-2313.
https://doi.org/10.1093/mnras/stac2388 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159782320&doi=10.1093%2fmnras%2fstac2388&partnerID=40&md5=a87fcadeab90f38ee6c5106aae541976
Joseph P., Department of Physics, CHRIST (Deemed to Be University), Bangalore, 560029, India, Indian Institute of Astrophysics, Bangalore, 560034, India; Sreekumar P., Indian Institute of Astrophysics, Bangalore, 560034, India, ISRO HQ, Antariksh Bhavan, Bangalore, 560094, India; Stalin C.S., Indian Institute of Astrophysics, Bangalore, 560034, India; Paul K.T., Department of Physics, CHRIST (Deemed to Be University), Bangalore, 560029, India; Mondal C., Inter-University Center for Astronomy and Astrophysics, Pune, 411007, India; George K., Faculty of Physics, Ludwig-Maximilians-Universit, Scheinerstr 1, Munich, D-81679, Germany; Mathew B., Department of Physics, CHRIST (Deemed to Be University), Bangalore, 560029, India
UVIT view of NGC 5291: Ongoing star formation in tidal dwarf galaxies at ? 0.35 kpc resolution
galaxies: dwarf; galaxies: formation; galaxies: interactions; galaxies: star formation; stars: formation; ultraviolet: galaxies
NGC 5291, an early-type galaxy surrounded by a giant H I ring, is believed to be formed from collision with another galaxy. Several star forming complexes and tidal dwarf galaxies are distributed along the collisional ring which are sites of star formation in environments where extreme dynamical effects are involved. Dynamical effects can affect the star formation properties and the spatial distribution of star forming complexes along the tidal features. To study and quantify the star formation activity in the main body and in the ring structure of the NGC 5291 system, we use high spatial resolution FUV and NUV imaging observations from the Ultraviolet Imaging Telescope onboard AstroSat. A total of 57 star-forming knots are identified to be part of this interacting system out of which 12 are new detections (star forming complexes that lie inside the H I contour) compared to the previous measurements from lower resolution UV imaging. We estimate the attenuation in UV for each of the resolved star-forming knots using the UV spectral slope ?, derived from the FUV - NUV colour. Using the extinction corrected UV fluxes, we derive the star formation rate of the resolved star forming complexes. The extinction corrected total star formation rate of this system is estimated as 1.75 0.04 M? yr-1. The comparison with dwarf galaxy populations (BCD, Sm, and dIm galaxies) in the nearby Universe shows that many of the knots in the NGC 5291 system have SFR values comparable to the SFR of BCD galaxies. 2023 The Author(s).
Rakhi R.; Santhosh G.; Joseph P.; George K.; Subramanian S.; Kavila I.; Postma J.; Duc P.-A.; CP.; Cortese L.; Ghosh S.K.; Subramaniam A.; Tandon S.; Hutchings J.; Wesley P.S.; Bharadwaj A.; Niroula N.
Monthly Notices of the Royal Astronomical Society, Vol-522, No. 1, pp. 1196-1207.
https://doi.org/10.1093/mnras/stad970 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85160406844&doi=10.1093%2fmnras%2fstad970&partnerID=40&md5=c58ab3ae17263986b7a3ab46ca9eb158
Rakhi R., Department of Physics, NSS College, Pandalam Kerala, 689 501, India; Santhosh G., Department of Physics, NSS College, Pandalam Kerala, 689 501, India; Joseph P., Indian Institute of Astrophysics, Bangalore, 560034, India, Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; George K., Faculty of Physics, Ludwig-Maximilians-Universit, Scheinerstr. 1, Munich, D-81679, Germany; Subramanian S., Indian Institute of Astrophysics, Bangalore, 560034, India; Kavila I., School of Pure and Applied Physics, Mahatma Gandhi University, Kerala, Kottayam, 686560, India; Postma J., Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, T2N 1N4, AB, Canada; Duc P.-A., Universitde Strasbourg, CNRS, Observatoire astronomique de Strasbourg, UMR 7550, Strasbourg, F-67000, France; CP., Herzberg Astronomy and Astrophysics Research Centre, National Research Council of Canada, 5071 W. Saanich Road, Victoria, V9E 2E7, BC, Canada; Cortese L., International Centre for Radio Astronomy Research (ICRAR), University of Western Australia, Crawley, 6009, WA, Australia; Ghosh S.K., Tata Institute of Fundamental Research, Colaba, Mumbai, 400005, India; Subramaniam A., Indian Institute of Astrophysics, Bangalore, 560034, India; Tandon S., Inter-University Centre for Astronomy and Astrophysics, PostBag 4, Ganeshkhind, Pune, 411007, India; Hutchings J., Herzberg Astronomy and Astrophysics Research Centre, National Research Council of Canada, 5071 W. Saanich Road, Victoria, V9E 2E7, BC, Canada; Wesley P.S., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Bharadwaj A., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Niroula N., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India
UWB Monostatic RADAR-Based Heartbeat Monitoring in an Autonomous Vehicle
Non-Invasive Heartbeat Detection; Scattering Parameter; UWB Monostatic Radar; UWB Propagation; Vehicular Communication
Monitoring a driver's physiological state in real time is vital for enhancing road safety by detecting fatigue, medical emergencies, and enabling future health-intervention systems in autonomous vehicles. Ultra-Wideband (UWB) impulse radio monostatic Radar emerges as an attractive alternative due to its ability to perform non-invasive and highly sensitive detection of vital signs, including respiration and heart rate, through obstacles such as clothing or car seats. This paper presents a radar setup located in the seat, which propagates a UWB signal through human tissues from the back side of the driver up to the heart location. The transmitted and reflected UWB signal and antenna reflection coefficient S11 parameter are analysed to detect the heart rate for a heartbeat-induced heart model. Various UWB pulse types and their spectral characteristics are analysed to ensure efficient energy transmission within the FCC mask safety constraints. Time-domain analysis of the transmitted and received pulses reveals clear heartbeat analysis with minimal distortion, achieving accurate heart detection rates. Reflected-pulse analysis shows clear differences in amplitude between systole and diastole for normal and abnormal heart-radius conditions, allowing reliable detection of heart states. Time-of-flight and range estimation help in tracking the heart-wall movement accurately. FFT-based analysis of the time-varying S11 parameter estimates the heart rate, confirming precise non-invasive heartbeat detection through the thorax. . This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
SSRG International Journal of Electrical and Electronics Engineering;Volume;13;Issue;3;pp.200-209
All Open Access; Hybrid Gold Open Access
https://doi.org/10.14445/23488379/IJEEE-V13I3P115 https://www.scopus.com/pages/publications/105034898737?origin=resultslist
Udhyami M.B., Department of Electrical and Electronics Engineering, Christ Deemed to be University, Bangalore, India; Rodrigues J., Department of Electrical and Electronics Engineering, Christ Deemed to be University, Bangalore, India
UWB Radar based Respiratory Rate Detection for Driver
IR-UWB Gaussian pulse propagation; Non-invasive vital sign detection UWB monostatic Radar; Scattering parameter; UWB monostatic Radar; Vehicular communication
Continuous health monitoring and the early detection of physiological abnormalities play an important role in vehicular environments. In particular, respiration rate and heart rate estimations are crucial for preventing accidents caused by sudden health impairments to the driver. Impulse radio ultra-wideband (IR-UWB) radar provides an effective solution for long-duration and non-invasive respiration rate monitoring. UWB systems offer sub-nanosecond time resolution while operating at low transmitted power levels, making them suitable for continuous monitoring of the human body. UWB pulses possess strong penetration capability, allowing signals to pass through obstacles such as clothing and vehicle seat covers. This paper presents an IR-UWB radar-based framework for estimating respiration rate using a seat-integrated monostatic radar configuration, where UWB signals propagate through the thoracic region from the posterior side toward the lung. Respiration-induced variations in lung geometry and dielectric properties under different physiological conditions result in corresponding changes in the reflected pulses, which can be analysed for respiration monitoring. Furthermore, variations in the antenna reflection coefficient (S11) exhibit noticeable differences under different lung conditions, from which respiration waveforms can be derived. The extracted respiration-related signal is subsequently transformed into the frequency domain using the Fast Fourier transform (FFT), which enables the accurate estimation of the respiration rate. In this paper, the UWB signal for radar communication complies the Federal Communications Commission (FCC) spectral mask from 3.1 - 10.6 GHz to ensure human safety. The results presented in this paper confirm that the proposed UWB Gaussian seventh-derivative IR-UWB Radar combined with FFT-based processing enables reliable respiration rate estimation and is well-suited for continuous in-seat vital sign monitoring in driving environments. 2026 IEEE.
Proceedings of the 2026 International Conference on AI-Driven Smart Systems and Ubiquitous Computing, ICAUC 2026;pp.477-483
Institute of Electrical and Electronics Engineers Inc.
https://doi.org/10.1109/ICAUC68182.2026.11441090 https://www.scopus.com/pages/publications/105037454073?origin=resultslist
Udhyami M.B., Christ Deemed to be University, Department of Electrical and Electronics, Bangalore, India; Rodrigues J., Christ Deemed to be University, Department of Electrical and Electronics, Bangalore, India
Vacuum annealed tin sulfide (SnS) thin films for solar cell applications
Absorption coefficient; AFM; Annealing; Thermal evaporation; Thin films; Tin sulfide
Thin films of tin sulfide (SnS) were grown on a glass substrate at an optimum temperature of 300 C by thermal evaporation technique. Following the deposition, films were vacuum annealed at different temperatures in the range of 100 to 300 C for 2 h. The effect of annealing temperature (Ta) on the composition, surface morphology, microstructure, optical and electrical properties was investigated. Elemental analysis showed sulfur deficiency of annealed films and the Sn to S atomic percent ratio increased from 1.0 to 1.1. XRD analysis confirmed the orthorhombic crystal structure of the films with (111) preferred orientation and phase purity. Degree of preferred orientation decreased with increase in Ta and the diffraction peaks corresponding to other planes intensified. Increasing the Ta to 300 C led to an increase in crystallite size to 129 nm. Results indicated presence of several crystallites in the grains of as-deposited films. AFM studies revealed the fragmentation of larger grain and the average grain size reduced form 265 nm for as-deposited films to 132.8 nm for the film annealed at 300 C. An apparent shift in absorption edge towards longer wavelengths is observed for films annealed at Ta > 200 C. The optical constant such as optical band gap, extinction coefficient (k), absorption coefficient (?) and refractive index (n) have been evaluated. The optical band gap of SnS thin films varied marginally with the annealing temperature and remained in between 1.331.29 eV. The extinction coefficient of the film annealed at 300 C was enhanced and is found to be 0.85 at 700 nm. At the annealing temperature of 300 C, the SnS films had enhanced electrical properties: the electrical resistivity was 7.8 ? cm, the p-type carrier concentration was up to 2.17 1016 cm?3, and the mobility was about 36.9 cm2V?1s?1. The variation of physical parameters with Ta has been explained by taking into account the crystallite size and the presented values are discussed with relevance to solar cells. 2017 Elsevier B.V.
Hegde S.S.; Kunjomana A.G.; Murahari P.; Prasad B.K.; Ramesh K.
Surfaces and Interfaces, Vol-10, pp. 78-84.
https://doi.org/10.1016/j.surfin.2017.12.003 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85038255000&doi=10.1016%2fj.surfin.2017.12.003&partnerID=40&md5=8d2e411d3668cff264b57389bdb55d02
Hegde S.S., Department of Physics, CMR Institute of Technology, Bangalore, 560037, India; Kunjomana A.G., Department of Physics, Christ University, Bangalore, 560029, India; Murahari P., Department of Physics, Indian Institute of Science, Bangalore, 560012, India, School of Physics and Astronomy, Queen Mary University of London, Mile End, London, E1 4NS, United Kingdom; Prasad B.K., Department of Physics, CMR Institute of Technology, Bangalore, 560037, India; Ramesh K., Department of Physics, Indian Institute of Science, Bangalore, 560012, India
Vacuum flask: An innovation of scientists /
Patent Number: 202141039314, Applicant: A S Nikkitta Fame. We are living in an era where we want to get things instantly. Whatever it is, we want it immediately. During a pandemic, long journey or even at your workspace you wont be able to get things in a flash. Thats when this customised flask Fames comes into the picture. Its usage isnt restricted to any specific age, it could be used by people belonging to all age group. The proposed flask has three parts as a whole. The 1 st is the cap which could also be used as a mug to pour the drink. The 2nd part is the body which is made up of metal, where you store the liquid.
https://drive.google.com/file/d/1kaQhpuVIcDF9OJnH9BH4bLcPQ4xalE9E/view
Validating a Teacher Professional Development Program to Develop Leadership and Mentorship among in-Service Teachers
content validity; empirical validity; leadership; mentorship; module development; professional development
School teachers are pivotal in shaping the world's future. Their ongoing professional development (PD) is crucial to fostering a positive school culture. This study aimed to develop and validate a PD program for in-service teachers, ensuring its content and empirical validity in enhancing teacher leadership and mentorship. The module underwent content validation by 14 experts using Lawshe's content validity ratio and the content validity index to determine its appropriateness and alignment with PD proposed by the National Education Policy 2020. Empirical validation was conducted with 30 participants using a single-group pre-testpost-test design to measure the module's impact. Content validation confirmed the high expert agreement, indicating strong content relevance. Empirical validation revealed significant improvements in participants leadership and mentorship competencies as evidenced by positive post-test outcomes. The findings suggest that the module effectively enhances teacher professional development (TPD) by improving association, professional learning, assessment, instruction, community and policy in leadership, and self-efficacy and outcome expectancy in mentorship. The validated module is a structured framework for TPD that contributes to evidence-based educational training. Future research could explore its long-term effectiveness with larger samples and a mixed-methods design, employing multiple models and frameworks, including India-specific ones, across diverse educational contexts. The Author(s) 2026
International Journal of Educational Reform;
https://doi.org/10.1177/10567879261446919 https://www.scopus.com/pages/publications/105038618338?origin=resultslist
TA A., School of Education, CHRIST University, Bangalore, India; DSouza G., School of Education, CHRIST University, Bangalore, India
VALIDATION OF CONTINUOUS FLOW METAL PLATE REACTORS IN THE TERPENE KETONE SYNTHESIS BY ALCOHOL OXIDATION
Continuous Flow Process; Metal Plate Reactor; Oxidation Reaction; Ruthenium Catalyst; Secondary and Tertiary Alcohols
The present study elucidates the oxidation of alcohols to terpene ketones using dichloro(p-cymene) ruthenium (II) dimer catalyst by continuous flow process using a metal plate reactor. The synthesized products were separated and validated using GC, GCMS,1 H-NMR, and13 C-NMR techniques. The reaction process exhibited product yield in the range of 80-95% on a scale of 1-80 grams. Optimization studies were conducted to calibrate the reaction conditions to improve the product yield. The scope of the reaction was explored using aromatic, cyclic, and aliphatic alcohols under optimized conditions, which resulted in high yields of terpene ketones. A reaction mechanism is proposed for the oxidation of alcohols by a continuous flow process. The significant advantages of the current protocol include synthesis at mild conditions, safer handling of reagents, flexibility to tune reaction conditions, and straightforward scale-up in the range of 1-80 grams with high efficiency and reproducibility. 2024, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
Rasayan Journal of Chemistry, Vol-17, No. 2, pp. 696-708.
Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma
Imam K., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Binish C.J., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Vijayasankar A.V., Department of Sciences and Humanities, CHRIST (Deemed to be University), Bangalore, 560074, India
Validation of localised coastal wind forecasts for artisan fishers of southwestern India
Kurup P.H.; Abhilash S.; Mavath S.; Mini V.K.; Alamirew N.; Martin M.
https://doi.org/10.1002/wea.4554 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85192366730&doi=10.1002%2fwea.4554&partnerID=40&md5=c63e8fce9d88cd28fbfc10a507cf7e88
Kurup P.H., Advanced Centre for Atmospheric Radar Research, Cochin University of Science and Technology, Ernakulam, India; Abhilash S., Advanced Centre for Atmospheric Radar Research, Cochin University of Science and Technology, Ernakulam, India; Mavath S., Advanced Centre for Atmospheric Radar Research, Cochin University of Science and Technology, Ernakulam, India; Mini V.K., Meteorological Centre Thiruvananthapuram, India Meteorological Department, Ministry of Earth Sciences, Thiruvananthapuram, India; Alamirew N., Department of Geography, University of Sussex, Brighton, United Kingdom; Martin M., Advanced Centre for Atmospheric Radar Research, Cochin University of Science and Technology, Ernakulam, India, Department of Geography, University of Sussex, Brighton, United Kingdom, Department of Life Sciences, Christ University, Bengaluru, India
Validity of a Short Version Scale of Knowledge, Attitudes and Practices of Sexual and Reproductive Health in Indigenous Women in Mexico
indigenous women; reliability; scale; Sexual and reproductive health; validity
The study evaluated the validity and reliability of the Scale of Knowledge, Attitudes and Practices of Sexual and Reproductive Health (ECAPSSR) in indigenous women in Mexico. A total of 177 women aged 14 to 48 participated, and signed and authorized their participation. Three dimensions were evaluated: knowledge, attitudes and practices. A final version of 78 questions of the original scale was obtained with acceptable reliability. Confirmatory Factor Analysis suggests an acceptable fit in three subscales. A valid, reliable and structured version was obtained as a screening option that allowed the evaluation of sexual and reproductive health in indigenous women. 2025 Society for Menstrual Cycle Research.
Coss-Torres, Patricia Elizabeth; Sanjuan-Meza, Xiomara Sarah Sathiyaseelan, Anuradha; Ortega Velquez, Aida; Chez-Orta, Sebasti Israel; Aguilera-Dz de Le, Frida Hosana
Women's Reproductive Health;Volume;12;Issue;3;pp.711-727
https://doi.org/10.1080/23293691.2025.2490754 https://www.scopus.com/pages/publications/105003888380?origin=resultslist
Coss-Torres P.E., Public Health and Medical Sciences Department, Medicine School, Autonomous University of San Luis Potos San Luis Potos Mexico; Sanjuan-Meza X.S., Autonomous University of San Luis Potos San Luis Potos Mexico; Sathiyaseelan A., Psychology Department, Christ University, Karnataka, Bangalore, India; Ortega Velquez A., School of Accounting and Administration, Autonomous University of San Luis Potos San Luis Potos Mexico; Chez-Orta S.I., Public Health and Medical Sciences Department, Medicine School, Autonomous University of San Luis Potos San Luis Potos Mexico; Aguilera-Dz de Le F.H., Public Health and Medical Sciences Department, Medicine School, Autonomous University of San Luis Potos San Luis Potos Mexico
Valorisation of coffee husk as replacement of sand in alkali-activated bricks
Alkali-activated; Bricks; Coffee husk; Sand; Valorization
The coffee industry is known to generate voluminous amount of waste during its production process. Different types of waste such as coffee hush ash and spent coffee ground, to name a few, have been extensively researched as a substitute in the construction industry. However, the utilization of coffee husk as a substitute for construction materials has seen limited exploration. In particular, there are no studies which investigate the utilization of waste coffee husk (WCH) in alkali-activated bricks. Therefore, in this research WCH was employed as a substitute to sand in alkali-activated bricks. Alkali-activated bricks were synthesized with ground granulated blast furnace slag (GGBFS), fly ash (FA), sand, and sodium silicate solution (SS). Sand was replaced with WCH at replacement rates of 0 %, 5 %, 10 %, 15 %, 20 %, and 30 % by volume. The developed bricks were evaluated for strength, density, water absorption, porosity, and efflorescence. Additionally, structural and morphological characteristics of bricks were assessed by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and Scanning electron microscopy (SEM) analysis. The results indicate that bricks with WCH improve the compressive strength with a maximum value of 15.7 MPa, and reduce the density with a minimum value of 1509 kg/m3 for composites with 30 % WCH, respectively. The water absorption and porosity of bricks increased with incorporation of WCH due to porous structure of WCH. The physico-chemical analysis of the bricks shows effective geopolymerization in the composite system with WCH, and further the bricks with 30 % WCH depict thermal stability with insignificant weight loss at 575 ?. Finally, the composites with 30 % WCH classify as good quality bricks as per IS 1077: 1992 specifications, and this will improve practical feasibility of such materials in the construction industry. 2024 The Authors
Biswas S.; Hossiney N.; Mohan M.K.; Kumar S.L.
Case Studies in Construction Materials, Vol-21
https://doi.org/10.1016/j.cscm.2024.e03440 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85196497677&doi=10.1016%2fj.cscm.2024.e03440&partnerID=40&md5=171146346995cef14a428791ab27052d
Biswas S., Department of Civil Engineering, School of Engineering and Technology, Christ University, Bangalore, 560074, India; Hossiney N., Department of Civil Engineering, School of Engineering and Technology, Christ University, Bangalore, 560074, India; Mohan M.K., Sciences and Humanities, School of Engineering and Technology, Christ University, Bangalore, 560074, India; Kumar S.L., Department of Civil Engineering, School of Engineering and Technology, Christ University, Bangalore, 560074, India
Valorisation of starfruit waste derived pectin for biodegradable sheet fabrication: A comprehensive study on extraction and characterization
Biopolymer; characterization; extraction; pectin; starfruit
This research work focuses on the extraction and characterization of pectin from starfruit peel and its application for fabrication of pectin film. Starfruit is chosen as the source for pectin extraction as the data regarding pectin extraction starfruit is relatively scarce in the available literature. Conventional organic acid based extraction using citric acid is employed for pectin extraction as it is eco-friendly and cost effective. The yield of pectin was found to be 8.22 1.018 (w/w). Fourier-transform infrared spectroscopy (FT-IR), analysis is used to identify functional groups present in the extracted pectin and X-ray Powder Diffraction (XRD) is done to check its crystallinity. Furthermore, scanning electron microscopy (SEM) characterization was performed to deduce the morphological characteristics of the extracted biopolymer. The particle size was found to be between 1m and 20 m. Fabrication of pectin based film was done using solvent cast method. The biodegradable film developed was found to be transparent and flexible. This work highlights the use of starfruit as a cost effective substrate for pectin extraction. Future studies should aim at exploring various applications of pectin and utilizing its potential in diverse applications. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Achyutuni, Apurva Gayatri; Umesh, Mridul
Environmental Research and Technology;Volume;9;Issue;2;pp.328-333
https://doi.org/10.35208/ert.1596863 https://www.scopus.com/pages/publications/105035727604?origin=resultslist
Achyutuni A.G., Department of Life Sciences, Christ University, Karnataka, Bengaluru, India; Umesh M., Department of Life Sciences, Christ University, Karnataka, Bengaluru, India
Valorization of agro-industrial fruit peel waste to fluorescent nanocarbon sensor: Ultrasensitive detection of potentially hazardous tropane alkaloid
Agro-industrial waste; Atropine sulphate; Fluorescence sensing; Nanodiamond-like carbon; Orange peel; Valorization
Millions of tonnes of agro-industrial waste are generated each year globally, with the vast majority of it going untreated, underutilized, and disposed of by burning or landfilling, causing severe environmental distress and economic downturn. A practical solution to this global issue is to use green chemistry to convert this waste into value-added products. Accordingly, in the present study, agro-industrial orange peel waste was valorized into fluorescent nanodiamond-like carbon sensor via a green route involving hydrothermal treatment of microwave carbonized orange peel waste. The developed sensor, used for the fluorescence detection of potentially hazardous drug atropine sulfate, exhibits unique dual linearity over concentration ranges of 300 nM to 1 M and from 1 M to 10 M, as well as ultra-low sensitivity of 34.42 nM and 356.46 nM, respectively. Additionally, the sensor demonstrates excellent reproducibility, high stability, and satisfactory recovery when used to identify and quantify atropine sulfate in biological samples and commercially available pharmaceuticals, indicating promising multidisciplinary applications. [Figure not available: see fulltext.] 2021, Higher Education Press.
Frontiers of Environmental Science and Engineering, Vol-16, No. 3
Ramya A.V., Nanocarbon Research Group, Materials Science Research Laboratory, Department of Physics and Electronics, CHRIST (Deemed to be University), Bengaluru, Karnataka, 560029, India; Balachandran M., Nanocarbon Research Group, Materials Science Research Laboratory, Department of Physics and Electronics, CHRIST (Deemed to be University), Bengaluru, Karnataka, 560029, India
Valorization of bovine tannery fleshing waste as a fish meal replacer: a conceivable green approach
Bovine tannery fleshing waste; Fermentation; Fish meal replacer; Resource recovery; Solid waste management
The study intended to utilize bovine tannery fleshing (BTF) a significant contributor of solid wastes in leather industries, in its unhydrolyzed form (raw fleshing flour [RFF]) as well as in fermented form (fermented fleshing flour [FFF]) as fish meal (FM) replacer in formulated aqua feeds. In line with this, experimental diets were formulated, characterized, and evaluated for their virtue. Improvement in the physical quality of diets was achieved with FFF incorporation, enabling better pelletability, palatability, and feed texture. As the formulated diets were of sinking type, feeding trials on column as well as bottom feeders were concertedly attempted, as a value-added application of proteinaceous feed ingredient (BTF) in aquaculture sector. FFF inclusion diets proved superior to RFF inclusion diets. Maximum protein and lipid retentions of 89% and 92% were evidenced. Fish feeding experiments disclosed the productive impact of substituting FM with FFF by 50 and 75% on the performance (fish growth) of Cirrhinus mrigala (19.03 cm final length, 112.89 g Kg-1 final body weight, and 99% survival rate) and Labeo rohita (22.19 cm final length, 214.99 g Kg-1 final body weight, and 97% survival rate) respectively, with enhanced muscle biochemical compositions. FFF inclusion diets best suited column feeders than bottom feeders, with acceptable feed conversion ratio (< 2) and about 65% and 69% of protein in Rohu and Mrigal, respectively after 90 days of feeding. Absence of feed related mortality and multimycotoxins in FFF inclusion diets authenticated its invulnerable nature, signifying the need of bacterial fermentation processes to pull out the maximum worth of the solid waste. Thus, bovine tannery fleshing (BTF) would probably be used as a relatively inexpensive, effectual, safe, and an absolute source of protein for marine animals, reinforcing aquaculture business to strengthen up its profitability and eventually; this is an assuring conscientious solid waste management strategy that could be scaled-up to develop high-quality aquaculture feeds. 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Springer Science and Business Media Deutschland GmbH
Thazeem B., Waste Management Division, Integrated Rural Technology Centre (IRTC), Kerala, Palakkad, 678592, India; Umesh M., Department of Life Sciences, CHRIST (Deemed to be University), Hosur Road, Karnataka, Bengaluru, 560029, India
The study intended to utilize bovine tannery fleshing (BTF) a significant contributor of solid wastes in leather industries, in its unhydrolyzed form (raw fleshing flour [RFF]) as well as in fermented form (fermented fleshing flour [FFF]) as fish meal (FM) replacer in formulated aqua feeds. In line with this, experimental diets were formulated, characterized, and evaluated for their virtue. Improvement in the physical quality of diets was achieved with FFF incorporation, enabling better pelletability, palatability, and feed texture. As the formulated diets were of sinking type, feeding trials on column as well as bottom feeders were concertedly attempted, as a value-added application of proteinaceous feed ingredient (BTF) in aquaculture sector. FFF inclusion diets proved superior to RFF inclusion diets. Maximum protein and lipid retentions of 89% and 92% were evidenced. Fish feeding experiments disclosed the productive impact of substituting FM with FFF by 50 and 75% on the performance (fish growth) of Cirrhinus mrigala (19.03 cm final length, 112.89 g Kg-1 final body weight, and 99% survival rate) and Labeo rohita (22.19 cm final length, 214.99 g Kg-1 final body weight, and 97% survival rate) respectively, with enhanced muscle biochemical compositions. FFF inclusion diets best suited column feeders than bottom feeders, with acceptable feed conversion ratio (< 2) and about 65% and 69% of protein in Rohu and Mrigal, respectively after 90 days of feeding. Absence of feed related mortality and multimycotoxins in FFF inclusion diets authenticated its invulnerable nature, signifying the need of bacterial fermentation processes to pull out the maximum worth of the solid waste. Thus, bovine tannery fleshing (BTF) would probably be used as a relatively inexpensive, effectual, safe, and an absolute source of protein for marine animals, reinforcing aquaculture business to strengthen up its profitability and eventually; this is an assuring conscientious solid waste management strategy that could be scaled-up to develop high-quality aquaculture feeds. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023.
Biomass Conversion and Biorefinery;Volume;15;Issue;15;pp.22437-22457
https://doi.org/10.1007/s13399-023-05033-8 https://www.scopus.com/pages/publications/85175620400?origin=resultslist
Valorization of Fish Waste for Chitosan Production: A Sustainable Approach
Fish waste can be used as an ideal substrate for extraction of commercially important bio-polymers like chitosan. Chitosan is a versatile biopolymer with various biological and chemical properties such as biocompatibility, biodegradability and antimicrobial properties and can be a major applicant in different industries. The present research work focuses on extracting chitosan from fish scale waste through chemical extraction methods. Demineralization in this study is done using 1% HCl for 36 hours at 150 rpm and deproteinization is done using dilute 0.5N NaOH for 18 hours at 150 rpm. The final step deacetylation is done using a concentrated 40% NaOH solution at 90?C for 6 hours. The extracted chitosan had a yield of 12% per 100g of fish scale and characterization was done using FTIR, XRD, TGA and DSC. Further the possibility of fabrication of chitosan films followed by assessing their biodegradability will be the future scope of the work. The Electrochemical Society
ECS Transactions, Vol-107, No. 1, pp. 16259-16266.
https://doi.org/10.1149/10701.16259ecst https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130538100&doi=10.1149%2f10701.16259ecst&partnerID=40&md5=5e87e4f1039d75eb2a33c9e9c4ab16e0
Suresh S., Department of Life Sciences, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Umesh M., Department of Life Sciences, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Sarojini S., Department of Life Sciences, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India