254 results on '"Sen SK"'
Search Results
2. New Retarded Integral Inequalities with Applications
- Author
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Kim Young-Ho, Agarwal RaviP, and Sen SK
- Subjects
Mathematics ,QA1-939 - Abstract
Abstract Some new nonlinear integral inequalities of Gronwall type for retarded functions are established, which extend the results Lipovan (2003) and Pachpatte (2004). These inequalities can be used as basic tools in the study of certain classes of functional differential equations as well as integral equations. A existence and a uniqueness on the solution of the functional differential equation involving several retarded arguments with the initial condition are also indicated.
- Published
- 2008
3. Physiology of Reproduction
- Author
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Bhatt, Meenakshi, primary, Gaikwad, Harsha, additional, and Sen, SK, additional
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- 2016
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4. Destructive Operations
- Author
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Salhan, Sudha, primary, Sen, SK, additional, and Manchanda, Rahul, additional
- Published
- 2016
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5. Handling climate change education at universities: an overview
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Leal Filho, W, Sima, M, Sharifi, A, Luetz, JM, Salvia, AL, Mifsud, M, Olooto, FM, Djekic, I, Anholon, R, Rampasso, I, Kwabena Donkor, F, Dinis, MAP, Klavins, M, Finnveden, G, Chari, MM, Molthan-Hill, P, Mifsud, A, Sen, SK, Lokupitiya, E, Leal Filho, W, Sima, M, Sharifi, A, Luetz, JM, Salvia, AL, Mifsud, M, Olooto, FM, Djekic, I, Anholon, R, Rampasso, I, Kwabena Donkor, F, Dinis, MAP, Klavins, M, Finnveden, G, Chari, MM, Molthan-Hill, P, Mifsud, A, Sen, SK, and Lokupitiya, E
- Abstract
Background: Climate change is a problem which is global in nature, and whose effects go across a wide range of disciplines. It is therefore important that this theme is taken into account as part of universities´ teaching and research programs. Methods: A three-tiered approach was used, consisting of a bibliometric analysis, an online survey and a set of case studies, which allow a profile to be built, as to how a sample of universities from 45 countries handle climate change as part of their teaching programs. Results: This paper reports on a study which aimed at identifying the extent to which matters related to climate change are addressed within the teaching and research practices at universities, with a focus on the training needs of teaching staff. It consists of a bibliometric analysis, combined with an online worldwide survey aimed at ascertaining the degree of involvement from universities in reducing their own carbon footprint, and the ways they offer training provisions on the topic. This is complemented by a set of 12 case studies from universities round the world, illustrating current trends on how universities handle climate change. Apart from reporting on the outcomes of the study, the paper highlights what some universities are doing to handle climate issues, and discusses the implications of the research. Conclusions: The paper lists some items via which universities may better educate and train their students on how to handle the many challenges posed by climate change.
- Published
- 2021
6. Governance and sustainable development at higher education institutions
- Author
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Leal Filho, W, Salvia, AL, Frankenberger, F, Akib, NAM, Sen, SK, Sivapalan, S, Novo-Corti, I, Venkatesan, M, Emblen-Perry, K, Leal Filho, W, Salvia, AL, Frankenberger, F, Akib, NAM, Sen, SK, Sivapalan, S, Novo-Corti, I, Venkatesan, M, and Emblen-Perry, K
- Abstract
© 2020, Springer Nature B.V. Governance issues, here interpreted as the provisions of adequate policy frameworks characterized by reliability and accountability, coupled with resources to support their implementation, are known to be the basis for the implementation of sustainable development measures. This paper discusses the influence of governance in the ways sustainability is perceived and practiced in a higher education context. Apart from due considerations to the role of governance as the basis for regulation and institutional actions and management decisions, this paper reports on an empirical study undertaken in a sample of higher education institutions. This study entailed an analysis of sustainable development policies, certification, organizational structure, budget, reports, team for sustainability, staff training, and challenges for the integration of sustainability and governance. The results suggest that even though there are different opinions and attitudes on the role of governance, it is regarded as an important component in supporting efforts by higher education institutions to include considerations on sustainable development as part of their strategies.
- Published
- 2021
7. Development of Female Genital Tract
- Author
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Salhan, Sudha, primary, Paramita, Paramita, additional, and Sen, SK, additional
- Published
- 2011
- Full Text
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8. Destructive Operations
- Author
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Salhan, Sudha, primary, Sen, SK, additional, and Manchanda, Rahul, additional
- Published
- 2007
- Full Text
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9. Physiology of Conception and Foetal Development
- Author
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Bhatt, Meenakshi, primary, Gaikwad, Harsha, additional, and Sen, SK, additional
- Published
- 2007
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10. Scope and Technique of Evisceration
- Author
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Sen, SK, primary and Manchanda, R, additional
- Published
- 2003
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11. Simple glove guard to protect soft tissues during digital amputation
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Honeyman, CS, primary, Wiberg, A, additional, and Sen, SK, additional
- Published
- 2016
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12. Biotechnological potential of natural food grade biocolorants
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Chattopadhyay, P, Chatterjee, S, and Sen, SK
- Subjects
Biocolorants, natural food colorants, carotenoids, anthocyanins, betalains, biotechnology - Abstract
Color becomes the most sensitive part of any commodity not only for its appeal but also it enhances consumer acceptability. In addition, the color of a food substance is important to indicate its freshness and safety that are also indices of good aesthetic and sensorial values. For natural color and additives, adherence to the norms of biosafety protocol, are limited. The demand for natural source of such compounds is increasing day by day because of awareness of positive health benefit out of natural compounds. It therefore, necessitates looking into natural sources of food grade colorants and their use potentials. It is found more justified to use the term biocolorant instead of biopigment. Since pigments are mostly water insoluble with exceptions of certain pigments of biological origin. This article includes the advancements of process development and other biotechnological aspects of natural food grade colorants.
- Published
- 2010
13. A direct heuristic algorithm for linear programming
- Author
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Sen, SK and Ramful, A
- Subjects
Supercomputer Education & Research Centre - Abstract
An $O(n^{\mathrn{3}})$ mathematically non-iterative heuristic procedure that needs no artificial variable is presented for solving linear programming problems. An optimality test is included. Numerical experiments depict the utility/scope of such a procedure.
- Published
- 2000
14. Abstract PD5-7: Phase Ib study of LCL161, an oral antagonist of inhibitor of apoptosis proteins, in combination with weekly paclitaxel in patients with advanced solid tumors: Safety and efficacy results, including breast cancer cohort
- Author
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Dienstmann, R, primary, Adamo, B, additional, Vidal, L, additional, Dees, EC, additional, Chia, S, additional, Mayer, EL, additional, Baney, TS, additional, Dhuria, S, additional, Sen, SK, additional, Papoutsakis, D, additional, Cameron, S, additional, and Infante, JR, additional
- Published
- 2013
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15. Eine randomisierte, unverblindete, neoadjuvante Phase-II-Studie mit einer wöchentlichen Gabe von Paclitaxel mit oder ohne LCL161, einem oralen IAP- Antagonisten (inhibitor of proteins, IAP), bei Patientinnen mit Triple-negativem Brustkrebs (TNBC)
- Author
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Liedtke, C, primary, Dienstmann, R, additional, Vidal, L, additional, Chia, S, additional, Mayer, EL, additional, Maur, M, additional, Birkholz, K, additional, Atienza, R, additional, Dhuria, S, additional, Sen, SK, additional, Cameron, S, additional, and Infante, JR, additional
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- 2013
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16. Abstract P6-11-06: A phase Ib study of LCL161, an oral inhibitor of apoptosis (IAP) antagonist, in combination with weekly paclitaxel in patients with advanced solid tumors
- Author
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Dienstmann, R, primary, Vidal, L, additional, Dees, EC, additional, Chia, S, additional, Mayer, EL, additional, Porter, D, additional, Baney, T, additional, Dhuria, S, additional, Sen, SK, additional, Firestone, B, additional, Papoutsakis, D, additional, Cameron, S, additional, and Infante, JR, additional
- Published
- 2012
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17. Stokes Flow between Two Cylinders
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Murad, A, primary and Sen, SK, primary
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- 2012
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18. Advanced Discrete Halanay-Type Inequalities: Stability of Difference Equations
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Agarwal, RaviP, primary, Kim, Young-Ho, additional, and Sen, SK, additional
- Published
- 2009
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19. New Retarded Integral Inequalities with Applications
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Agarwal, RaviP, primary, Kim, Young-Ho, additional, and Sen, SK, additional
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- 2008
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20. X-ray photoelectron spectroscopic studies of conducting polyaniline, poly bisphenol A carbonate and electrochemically synthesized composite of the two
- Author
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Bhattacharyya, A, primary, Roy, Rita, additional, Sen, SK, additional, Sen, Suchitra, additional, Chakraborty, AK, additional, and Bhattacharyya, TK, additional
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- 1998
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21. On Symmetrizing A Matrix
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Sen, SK and Venkaiah, VC
- Subjects
Supercomputer Education & Research Centre - Published
- 1988
22. On computing an equivalent symmetric matrix for a nonsymmetric matrix
- Author
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Sen, SK and Venkaiah, VC
- Subjects
Computer Science & Automation ,Mathematics - Abstract
A real or a complex symmetric matrix is defined here as an equivalent symmetric matrix for a real nonsymmetric matrix if both have the same eigenvalues. An equivalent symmetric matrix is useful in computing the eigenvalues of a real nonsymmetric matrix. A procedure to compute equivalent symmetric matrices and its mathematical foundation are presented.
- Published
- 1988
23. The use of chloroplast proteins in crop improvement
- Author
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Sen, SK, Giles, KL, Møller, Birger Lindberg, Høyer-Hansen, G, Henry, Landis EA, Sen, SK, Giles, KL, Møller, Birger Lindberg, Høyer-Hansen, G, and Henry, Landis EA
- Published
- 1983
24. General Scheme For Solving Ordinary Differential Equations Under 2-Point Boundary-Conditions
- Author
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Chanda, M and Sen, SK
- Subjects
Chemical Engineering - Published
- 1973
25. Deciphering the mechanism of anti-quorum sensing post-biotic mediators against Streptococcus mutans.
- Author
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Pallavi P, Kumar V, Sen SK, and Raut S
- Subjects
- Dental Caries microbiology, Dental Caries prevention & control, Glucans metabolism, Virulence Factors, Bacterial Proteins metabolism, Anti-Bacterial Agents pharmacology, Streptococcus mutans drug effects, Biofilms drug effects, Quorum Sensing drug effects, Glucosyltransferases metabolism, Glucosyltransferases antagonists & inhibitors
- Abstract
Objective: Glucosyltransferases (Gtfs) and quorum sensing (QS) mediated transduction genes play critical roles in the pathogenesis of Streptococcus mutan-mediated dental caries. Therefore, targeting gtfs and QS-mediated virulence genes have therefore emerged as an intriguing goal for efficient therapeutic approaches that block cariogenic biofilms., Methods: Post-biotic mediators (PMs) obtained from our previously isolated and characterized beneficial bacteria Enterobacter colacae PS-74 was assessed for its antibiofilm potential against S. mutans. According to the transcriptome method, qRT-PCR analysis was performed against virulence genes. For microscopic visualization, SEM and CLSM analyses were used to confirm the inhibitory effects of PMs., Results: PMs dramatically reduced the expression of QS signal transduction, glucan metabolism, and biofilm-regulated genes such gtfB, gtfC, ComDE, VicR, brpA in S. mutans, which validates the outcomes of in vitro result. Their unique metabolites may help to control biofilm formation by eluding antimicrobial resistance., Conclusion: Considering the above findings, PMs may deem to be an innovative, alluring, and secure method for preventing dental caries due to their biological activity. Our study unravels the inhibitory effect of PMs, which will contribute to instruct drug design strategies for effective inhibition of S. mutans biofilms., (© 2023 Wiley Periodicals LLC.)
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- 2024
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26. Comparative evaluation of anti-biofilm and anti- adherence potential of plant extracts against Streptococcus mutans: A therapeutic approach for oral health.
- Author
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Pallavi P, Sahoo PP, Sen SK, and Raut S
- Subjects
- Humans, Oral Health, Extracellular Polymeric Substance Matrix, Molecular Docking Simulation, Plant Extracts pharmacology, Biofilms, Acetates, Microbial Sensitivity Tests, Anti-Bacterial Agents pharmacology, Streptococcus mutans, Dental Caries prevention & control
- Abstract
Dental caries predominantly attributed to the cariogenic nature of Streptococcus mutans, continue to pose a substantial global challenge to oral health. In response to this challenge, this study aimed to evaluate the effectiveness of leaf extracts (LEs) and essential oils (EOs) derived from different medicinal plants in inhibiting the growth of Streptococcus mutans biofilm. In vitro and in silico approaches were employed to identify active compounds and assess their inhibitory effects on S. mutans. Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) were measured to determine the anti-biofilm and anti-adherence activity against S. mutans. Biofilm viability (CFU/mL) and extracellular polymeric substance (EPS) concentration were quantified. GC-MS analysis was utilized to identify active compounds in the most effective plant extracts exhibiting anti-S. mutans activity. A high-throughput screening focused on the interaction between these compounds and the target enzyme SortaseA (SrtA) using molecular docking was performed. Results indicated that Cymbopogon citratus displayed the highest efficacy in reducing S. mutans biofilm formation and adhesion activity, achieving 90 % inhibition at an MIC value of 12 μg/mL. Among the 12 bioactive compounds identified, trans-Carvyl acetate exhibited the lowest binding energy with SrtA (-6.0 Kcal/mole). Trans-Carvyl acetate also displayed favorable pharmacokinetic properties. This study provides novel insights into the anti-S. mutans properties of C. citratus and suggests its potential as a therapeutic approach for oral health. Further research is needed to explore the combined effect of plant extracts for enhanced protection against dental caries., Competing Interests: Declaration of competing interest The authors declare that they don't have any conflict of interest that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
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- 2024
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27. Effect of gamma (γ-) radiation on the opto-structural and morphological properties of green synthesized BaO nanoparticles using Moringa Oleifera leaves.
- Author
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Islam MR, Sen SK, Kumar A, Islam MS, Manir MS, Ara Z, Hossain MD, and Alam MK
- Abstract
In this current assessment, BaO synthesized from Moringa Oleifera leaves were irradiated using 0-75 kGy gamma radiation and investigated its physical impacts. The x-ray diffraction (XRD) data demonstrated the synthesis of tetragonal BaO, and no phase deviation was observed after irradiation. As doses are increased, the overall crystallite size were decreased due to an increase in defects and disorders. The tetragonal BaO was evident in Fourier transform infrared (FTIR) spectra prior to and following irradiation, while peak intensities and wavenumbers varied considerably. The as-prepared BaO showed a spherical shape morphology, and Field emission scanning electron microscopy (FESEM) indicated no vital deviations in it after irradiation. As irradiation shifts from 0 to 75 kGy, optical bandgap was increased from 4.55 to 4.93 eV, evaluated using Kubelka-Munk (K-M) equation from UV-vis-NIR spectrophotometer. Opto-electronic and photonic devices have challenges in extreme radiation conditions, such as space and nuclear environments. So, these assessments suggested that BaO can withstand high levels of gamma photon and could be a good option for photonic and optoelectronic instruments in an extreme gamma-ray exposed conditions., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
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- 2024
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28. Opportunities for basic, clinical, and bioethics research at the intersection of machine learning and genomics.
- Author
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Sen SK, Green ED, Hutter CM, Craven M, Ideker T, and Di Francesco V
- Subjects
- Humans, Algorithms, Privacy, Machine Learning, Genomics, Bioethics
- Abstract
The data-intensive fields of genomics and machine learning (ML) are in an early stage of convergence. Genomics researchers increasingly seek to harness the power of ML methods to extract knowledge from their data; conversely, ML scientists recognize that genomics offers a wealth of large, complex, and well-annotated datasets that can be used as a substrate for developing biologically relevant algorithms and applications. The National Human Genome Research Institute (NHGRI) inquired with researchers working in these two fields to identify common challenges and receive recommendations to better support genomic research efforts using ML approaches. Those included increasing the amount and variety of training datasets by integrating genomic with multiomics, context-specific (e.g., by cell type), and social determinants of health datasets; reducing the inherent biases of training datasets; prioritizing transparency and interpretability of ML methods; and developing privacy-preserving technologies for research participants' data., Competing Interests: Declaration of interests The authors declare no competing interests., (Published by Elsevier Inc.)
- Published
- 2024
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29. Harnessing the potential of white rot fungi and ligninolytic enzymes for efficient textile dye degradation: A comprehensive review.
- Author
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Kumar V, Pallavi P, Sen SK, and Raut S
- Subjects
- Lignin, Wastewater, Coloring Agents, Textiles, Fungi, Ecosystem, Laccase
- Abstract
The contamination of wastewater with textile dyes has emerged as a pressing environmental concern due to its persistent nature and harmful effects on ecosystems. Conventional dye treatment methods have proven inadequate in effectively breaking down complex dye molecules. However, a promising alternative for textile dye degradation lies in the utilization of white rot fungi, renowned for their remarkable lignin-degrading capabilities. This review provides a comprehensive analysis of the potential of white rot fungi in degrading textile dyes, with a particular focus on their ligninolytic enzymes, specifically examining the roles of lignin peroxidase (LiP), manganese peroxidase (MnP), and laccase in the degradation of lignin and their applications in textile dye degradation. The primary objective of this paper is to elucidate the enzymatic mechanisms involved in dye degradation, with a spotlight on recent research advancements in this field. Additionally, the review explores factors influencing enzyme production, including culture conditions and genetic engineering approaches. The challenges associated with implementing white rot fungi and their ligninolytic enzymes in textile dye degradation processes are also thoroughly examined. Textile dye contamination poses a significant environmental threat due to its resistance to conventional treatment methods. White rot fungi, known for their ligninolytic capabilities, offer an innovative approach to address this issue. The review delves into the intricate mechanisms through which white rot fungi and their enzymes, including LiP, MnP, and laccase, break down complex dye molecules. These enzymes play a pivotal role in lignin degradation, a process that can be adapted for textile dye removal. The review also emphasizes recent developments in this field, shedding light on the latest findings and innovations. It discusses how culture conditions and genetic engineering techniques can influence the production of these crucial enzymes, potentially enhancing their efficiency in textile dye degradation. This highlights the potential for tailored enzyme production to address specific dye contaminants effectively. The paper also confronts the challenges associated with integrating white rot fungi and their ligninolytic enzymes into practical textile dye degradation processes. These challenges encompass issues like scalability, cost-effectiveness, and regulatory hurdles. By acknowledging these obstacles, the review aims to pave the way for practical and sustainable applications of white rot fungi in wastewater treatment. In conclusion, this comprehensive review offers valuable insights into how white rot fungi and their ligninolytic enzymes can provide a sustainable solution to the urgent problem of textile dye-contaminated wastewater. It underscores the enzymatic mechanisms at play, recent research breakthroughs, and the potential of genetic engineering to optimize enzyme production. By addressing the challenges of implementation, this review contributes to the ongoing efforts to mitigate the environmental impact of textile dye pollution. PRACTITIONER POINTS: Ligninolytic enzymes from white rot fungi, like LiP, MnP, and laccase, are crucial for degrading textile dyes. Different dyes and enzymatic mechanisms is vital for effective wastewater treatment. Combine white rot fungi-based strategies with mediator systems, co-culturing, or sequential treatment approaches to enhance overall degradation efficiency. Emphasize the broader environmental impact of textile dye pollution and position white rot fungi as a promising avenue for contributing to mitigation efforts. This aligns with the overarching goal of sustainable wastewater treatment practices and environmental conservation. Consider scalability, cost-effectiveness, and regulatory compliance to pave the way for sustainable applications that can effectively mitigate the environmental impact of textile dye pollution., (© 2024 Water Environment Federation.)
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- 2024
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30. Fortification of orange juice with microencapsulated Kocuria flava Y4 towards a novel functional beverage: Biological and quality aspects.
- Author
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Barik A, Pallavi P, Sen SK, Rajhans G, Bose A, and Raut S
- Abstract
To commercialize functional foods, probiotics must exhibit high resistance and acceptable stability under various unfavorable conditions to maintain the quality of fruit juices. This study will provide an insight into fortification of orange juice with a plant probiotic Kocuria flava Y4 by microencapsulation. Therefore, this study investigated the colony release, physicochemical and phytochemical parameters, and antioxidant activity of the orange juice exposed to microencapsulated probiotics and the one without probiotics (control). Evaluation of orange juice on the growth of probiotic bacteria showed that the fortification with alginate and psyllium micro-particles showed highest encapsulation efficiency (99.01%) and acceptable viability of probiotic cells (8.12 ± 0.077 CFU/mL) during five weeks storage at 4 °C. The morphology and functional properties of beads was studied by SEM, Zeta-potential and FTIR analysis. The sucrose and organic acids concentrations decreased significantly during fortification period (0-72 h) except ascorbic acid. Furthermore, glucose, pH, acidity, TSS were maintained. The results affirm the suitability and feasibility of developing a plant probiotic beverage using orange juice by encapsulation method., Competing Interests: Authors have no conflict of interest., (© 2023 The Authors. Published by Elsevier Ltd.)
- Published
- 2023
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31. Probiotic Characterization of Indigenous Kocuria flava Y4 Strain Isolated from Dioscorea villosa Leaves.
- Author
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Barik A, Patel GD, Sen SK, Rajhans G, Nayak C, and Raut S
- Subjects
- Humans, Phylogeny, RNA, Ribosomal, 16S genetics, Prospective Studies, Dioscorea genetics, Probiotics pharmacology
- Abstract
This aim of the study was to isolate and screen potential probiotics from Dioscorea villosa leaves. The potential isolate Y4 was obtained from the Dioscorea villosa leaves, and its ability to grow in a medium containing high NaCl concentrations (2-10%) indicated its negative hemolytic activity. Furthermore, Y4 demonstrated inhibitory activity against human pathogens, such as Klebsiella pneumonia, Staphylococcus aureus, Citrobacter koseri, and Vibrio cholerae, as well as towards a plant pathogen isolate OR-2 (obtained from Citrus sinensis). Some biologically important functional groups of Y4 metabolites, such as sulfoxide; aliphatic ether; 1, 2, 3-trisubstituted, tertiary alcohol: vinyl ether; aromatic amine; carboxylic acid; nitro compound; alkene mono-substituted; and alcohol, were identified through FTIR analysis. The 16S rRNA sequencing and subsequent phylogenetic tree analysis indicated that Y4 and OR-2 are the closest neighbors to Kocuria flava (GenBank accession no. MT773277) and Pantoea dispersa (GenBank accession no. MT766308), respectively. The potential isolate Y4 was found to exhibit adhesion, auto-aggregation, co-aggregation, and weak biofilm activity. It also exhibited a high level of antimicrobial activity and antibiotic susceptibility. The safety of K. flava Y4 isolate, which is proposed to be a probiotic, was evaluated through acute oral toxicity test and biogenic amine production test. Moreover, the preservation potential of isolate Y4 was assessed through application on fruits under different temperatures. Thus, our results confirmed that Kocuria flava Y4 is a prospective probiotic and could also be used for the preservation of fruits., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2023
- Full Text
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32. Mycoremediation of anthraquinone dyes from textile industries: a mini-review.
- Author
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Sen SK, Raut S, and Raut S
- Abstract
The discharge of wastewater from textile industries into aquatic bodies has severe health and environmental impacts. Textile industries generate huge amounts of effluents containing hazardous toxic dyes. Anthraquinone (AQ) dyes containing AQ chromophore groups are the second most important class of nondegradable textile dyes, preceded by azo dyes. Despite their prevalence, biodegradation of AQ dyes has not yet been completely understood because of their complex and stable structures. Currently, microbiological approaches to treating dyeing wastewater are considered economical and feasible, and reports regarding fungal degradation of AQ dyes are increasing. Structures and classification of AQ dyes were summarized in this study along with degradative fungi, and their enzyme systems with influencing factors and possible mechanisms of AQ mycoremediation were explored. Furthermore, the existing problems and present research progress were discussed. Finally, the key points with future research directions were presented., Competing Interests: The authors declare no conflict of interest., (© 2023 Institute of Bioorganic Chemistry, Polish Academy of Sciences.)
- Published
- 2023
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33. Management of the Hand Tumors.
- Author
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Datta NK, Das KP, Aish PK, Datta M, Banik SK, Sen SK, and Chowdhury RM
- Subjects
- Humans, Male, Female, Prospective Studies, Bangladesh epidemiology, Wrist pathology, Glomus Tumor, Bone Neoplasms diagnosis, Bone Neoplasms therapy, Soft Tissue Neoplasms diagnosis, Soft Tissue Neoplasms therapy, Soft Tissue Neoplasms pathology, Neurofibroma, Giant Cell Tumors
- Abstract
Tumors in the hand are relatively uncommon but 95% are benign. Tumors occurring in the hand, forearm and arm often have unique growth patterns and potential for metastasis that may be different from those seen elsewhere in the body. Secondary metastatic tumors in the hand are very rare (0.1%). Diagnosis is mainly clinical, but X-ray, USG and MRI help as a diagnostic aid. The aim of the study was to early diagnosis, see the pattern and proper management of the hand tumor and ensure good hand function. This prospective study was done from January 2004 to July 2019. We found 220 hand tumors in the hand unit, Department of Orthopaedic Surgery, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka Bangladesh. Among 220 patients, male were 114(51.81%) and female were 106 (48.19%). Out of 220 patients we found 190(86.36%) benign tumor and tumor like lesions and 30(13.64%) was malignant hand tumors. Out of 190 benign lesions, benign tumor was 158(83.15%) and 32(16.85%) was tumor like lesions. Among 158 benign tumor, bone tumors were 40(25.31%) and soft tissue tumours were 138(74.69%). Out of soft tissue tumor, peripheral nerve tumor was 20(12.66%). Enchondroma and Giant cell tumors are the most common among the benign bone tumors, on the other hand giant cell tumors of tendon sheath, Glomus tumor, haemangioma, neurofibroma, schwanoma are the common soft tissue tumors. Compound palmar ganglion, fibromatosis and tuberculosis of phalanx are the most common tumor like lesions. Synovial sarcoma 10(33.33%), osteosarcoma 03(10%), chondrosarcoma 03(10%), ewings sarcoma 02(6.66%), fibrosarcoma 04 (13.33%), Malignant fibrous histocytoma 01(3.33%), soft tissue sarcoma 01(3.33%), Merkel cell tumor 01(3.33%), pleomorphic Rabdomyosarcoma 01(3.33%), malignant melanoma 01(3.33%), clear cell sarcoma of tendon and aponeurosis 01(3.33%), undifferentiated carcinoma 01(3.33%) and extra skeletal chondro sarcoma 01(3.33%) were the malignant tumors. Most of the benign lesions recovered fully after excision except neurofibroma and malignant tumors were treated with excision (including amputation) and chemo-radiotherapy successfully, but 4 patients were refereed to higher center due to recurrence and deteriation of hand function and one patient died due to metastasis. Malignant hand tumor management is very difficult even after amputation with multidisciplinary approach. Hand tumor is uncommon and malignant tumors are rare but any abnormal lump or bump in the hand or wrist is considered as tumor. Early detection and intervention are essential for better prognosis and survival for malignant tumors of hands and upper limbs.
- Published
- 2023
34. Structural, optical, magnetic, and enhanced antibacterial properties of hydrothermally synthesized Sm-incorporating α-MoO 3 2D-layered nanoplates.
- Author
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Sen SK, Munshi MR, Kumar A, Mortuza AA, Manir MS, Islam MA, Hossain MN, and Hossain MK
- Abstract
In this study, we have synthesized pristine and [0.5,1.5, and 2.5] M% samarium (Sm)-incorporating α-MoO
3 2D-layered nanoplates utilizing a facile hydrothermal process, and investigated the physical properties along with antibacterial effectiveness. X-ray diffraction (XRD) patterns confirmed the single-phase, stable orthorhombic polycrystalline structure of the as-prepared samples. The crystallite size, lattice strain, and dislocation density were measured using both Debye-Scherrer (D-S) and Williamson-Hall (W-H) techniques. Both pristine and Sm-incorporating α-MoO3 samples showed two-dimensional (2D) layered nanoplate-type surface morphology, revealed by field emission scanning electron microscopy (FE-SEM) images. Energy dispersive X-ray spectroscopy (EDS) confirmed the presence of Sm contents in the α-MoO3 matrix. After Sm incorporation in α-MoO3 , the different functional groups as well as vibrational groups were observed by Fourier-transform infrared (FTIR) spectroscopy and Raman spectroscopy analyses, respectively. The optical band gaps were measured from UV-vis diffuse reflectance spectroscopy (DRS) by employing the Kubelka-Munk formula and interestingly it is found that the bandgap energy ( Eg ) gradually decreased from 2.96 to 2.83 eV with the increment of Sm content. When compared to pristine α-MoO3 , the Sm-incorporating samples experienced a steady improvement in room temperature ferromagnetic (RTFM) behavior as Sm content increased, as measured by hysteresis loops. The antibacterial activities of both samples were assessed against Gram-positive: Staphylococcus aureus ( S. aureus ), and Gram-negative: Escherichia coli ( E. coli ) and Salmonella enteritidis ( S. enteritidis ) bacteria by the agar well diffusion method and enhanced antibacterial activity was observed as the Sm concentration increased, compared to pristine nanoplates. The obtained results suggest that the synthesized Sm-incorporating α-MoO3 2D-layered nanoplate could be a potential antibacterial agent., Competing Interests: The authors declare that they have no competing interests., (This journal is © The Royal Society of Chemistry.)- Published
- 2022
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35. Burn resuscitation: Are we weighing patients appropriately?
- Author
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Smith OA and Sen SK
- Subjects
- Humans, Fluid Therapy, Resuscitation, Burns therapy
- Published
- 2022
- Full Text
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36. The association between pulmonary vascular disease and respiratory improvement in infants with type I severe bronchopulmonary dysplasia.
- Author
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Carpenter RJ, Srdanovic N, Rychlik K, Sen SK, Porta NFM, Hamvas AE, Murthy K, and Hauck AL
- Subjects
- Echocardiography, Humans, Infant, Infant, Newborn, Pulmonary Artery diagnostic imaging, Bronchopulmonary Dysplasia complications, Hypertension, Pulmonary complications, Vascular Diseases complications
- Abstract
Objective: To describe the association between echocardiographic measures of pulmonary vascular disease and time to respiratory improvement among infants with Type I severe bronchopulmonary dysplasia (sBPD)., Study Design: We measured the pulmonary artery acceleration time indexed to the right ventricular ejection time (PAAT/RVET) and right ventricular free wall longitudinal strain (RVFWLS) at 34-41 weeks' postmenstrual age. Cox-proportional hazards models were used to estimate the relationship between the PAAT/RVET, RVFWLS, and the outcome: days from 36 weeks' postmenstrual age to room-air or discharge with oxygen (≤0.5 L/min)., Result: For 102 infants, the mean PAAT/RVET and RVFWLS were 0.27 ± 0.06 and -22.63 ± 4.23%. An abnormal measurement was associated with an increased time to achieve the outcome (PAAT/RVET: 51v24, p < 0.0001; RVFWLS; 62v38, p = 0.0006). A normal PAAT/RVET was independently associated with a shorter time to outcome (aHR = 2.04, 1.11-3.76, p = 0.02)., Conclusion: The PAAT/RVET may aid in anticipating timing of discharge in patients with type I severe BPD., (© 2022. The Author(s), under exclusive licence to Springer Nature America, Inc.)
- Published
- 2022
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37. Six-Month Outcomes of Reimplantation of a Coin-Sized Tibial Nerve Stimulator for the Treatment of Overactive Bladder Syndrome With Urgency Urinary Incontinence.
- Author
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Kaaki B, English S, Gilling P, Meffan P, Lucente V, MacDiarmid S, Clark M, and Sen SK
- Subjects
- Female, Humans, Male, Prospective Studies, Quality of Life, Replantation, Tibial Nerve, Treatment Outcome, Urinary Incontinence, Urge drug therapy, Urinary Bladder, Overactive therapy, Urinary Incontinence
- Abstract
Objective: The eCoin (Valencia Technologies Corporation, Valencia, CA) is a battery-powered, nickel-sized and shaped neuromodulation device for the treatment of overactive bladder, and it is implanted in the lower leg in a short office or outpatient procedure under local anesthesia. A follow-on trial was conducted to evaluate the feasibility, safety, and efficacy of eCoin reimplantation., Methods: This was a prospective, single-arm, open-label study, including 23 participants with refractory urgency urinary incontinence (UUI) who were previously participants in the eCoin clinical feasibility trial. This follow-on study was conducted at 7 sites in the United States and New Zealand. Participants were reimplanted with a new eCoin device and activated after 4 weeks. Bladder diary data and validated quality-of-life instruments, collected at 12 weeks and 24 weeks postactivation, were compared with baseline., Results: Participants of the study were considered responders if they reported a ≥ 50% reduction from baseline in episodes of UUI on a 3-day voiding diary. At 12 weeks of treatment, 74% (95% confidence interval [CI], 52%-90%) of participants were considered responders. At 24 weeks of treatment, 82% (95% CI, 60%-95%) of participants were considered responders with 36% (95% CI, 20%-57%) of participants achieving complete continence. There were no device-related serious adverse events reported during the study., Conclusions: The reimplantation of eCoin was both safe and effective in treating UUI associated with overactive bladder syndrome. The demonstrated significant reduction or resolution of symptoms with no serious safety concern suggests that eCoin is a convenient and maintainable therapeutic device., Competing Interests: B.K. declares that he serves as a consultant for Valencia Technologies, was an investigator on this Valencia-sponsored clinical trial, and owns minor equity interest in the company. S.K.S. declares that he has been compensated as a consultant for Valencia Technologies, and owns stock options representing less than 0.01% of the company. The remaining authors have declared they have no conflicts of interest. The authors who own a minor equity interest in the company constitute a very small percentage; all authors constitute less than 0.1% of the company. Furthermore, this potential conflict of interest was addressed according to the recommendations of the local and central IRBs including: (i) Having a statement in the informed consent stating the PI own a minority stake, and disclosing the potential conflict of interest for which the participant has to sign. (ii) The data collected for this study come from a voiding diary and quality of life questionnaires, which are filled out by the participants. The PIs and Clinical Research Coordinators (CRCs) were not allowed to revise or write on these forms. If any formatting edits were made, the participants were asked to change and initial the change themselves. (iii) Clinical Research Coordinators had no conflict of interest and they were the individuals who scanned and sent the raw data., (Copyright © 2021 The Author(s). Published by Wolters Kluwer Health, Inc.)
- Published
- 2022
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38. Association of PVL Gene in MSSA and MRSA Strains among Diabetic Ulcer Patients from Odisha, India.
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Pany S, Sharma BM, Sen SK, and Pal BB
- Abstract
Staphylococcus aureus has emerged as an important pathogen among diabetic foot ulcers in patients with diabetes. Infections with S. aureus in diabetic ulcers need surveillance of resistant microbial profile to provide the basis for empirical therapy for the reduction of lower extremities amputation. Panton valentine leucocidin ( PVL ) is considered as one of the major virulence gene of S. aureus which is responsible for destruction of white blood cells and tissue necrosis. This pore forming cytotoxin gene is carried out by both methicillin-susceptible S. aureus (MSSA) and methicillin-resistant S. aureus (MRSA) strains. The present study described the prevalence of PVL gene in MSSA and MRSA strains isolated from diabetic ulcer patients treated during November, 2019 to January, 2021 from a tertiary care hospital, Odisha. Infected tissue and blood samples from these patients were collected aseptically and sub-cultured using different media and standard techniques. The isolated genomic DNA of MSSA and MRSA strains were subjected to PCR assay for the detection of PVL gene. Two hundred ten S. aureus out of 402 diabetic ulcer patients were isolated having 59.52% MSSA and 40.47% MRSA strains. Wagner's grade III and grade IV ulcers were most prevalent in these ulcer patients. The prevalence of PVL gene in MSSA strains was more in comparison to MRSA strains. Forty five resistance patterns were observed from the antibiogram profiles of S. aureus. The present study highlighted that PVL gene could not be a marker for the detection of MRSA and MSSA strains in diabetic ulcer patients.
- Published
- 2022
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39. Purification and Optimization of Extracellular Lipase from a Novel Strain Kocuria flava Y4.
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Barik A, Sen SK, Rajhans G, and Raut S
- Abstract
The exogenous lipolytic activities of Kocuria sp. have been recognized earlier but the genus further contains many more unexplored strains. In this study, the extracellular lipase activity of Kocuria flava Y4 (GenBank accession no. MT773277), isolated from Dioscorea villosa during our previous study, was regulated by different physicochemical parameters, such as pH, temperature, shaking speed, and incubation time. For efficient immobilization of the extracellular lipase, 4% sodium alginate, 50 mL of 25 nM CaCl
2 .2H2 O solution, and 15 min. Hardening time of gel beads in calcium chloride was used. For the first time, K . flava Y4 lipase was purified using ammonium sulphate precipitation followed by dialysis and DEAE-Sepharose anion exchange chromatography with Sepharose-6B gel filtration chromatography, yielding ∼15-fold purified lipase with a final yield of 96 U/mL. The SDS-PAGE of purified lipase displayed a single strong band, indicating a monomeric protein of 45 kDa. At a temperature of 35°C and pH 8, the purified lipase showed maximum hydrolytic activity. Using p-nitrophenyl acetate (p-NPA) as the hydrolysis substrate, the values of Km and Vmax derived from the Lineweaver-Burk plot were 4.625 mM and 125 mol/min-1 mg-1 , respectively., Competing Interests: The authors declare that they have no conflicts of interest regarding the publication of this paper., (Copyright © 2022 Adyasa Barik et al.)- Published
- 2022
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40. Degradation of dyes by fungi: an insight into mycoremediation.
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Rajhans G, Barik A, Sen SK, and Raut S
- Abstract
Currently, globalization, urbanization and industrialization have led to several environmental issues. In many industries, particularly in textile industries, the extensive use of synthetic dyes has increased. Dye is an integral element used to impart color to textile materials. Wastes generated during the processing and treatment of the dye contain inorganic and organic compounds that are hazardous, thereby posing a serious threat to the ecosystem. It is therefore important to implement cost-efficient and successful measures against these emissions in order to preserve habitats and natural resources. In this context, biodegradation by fungi or mycoremediation of dyes using potential fungi is a fairly inexpensive and environmental friendly method for decomposing or mineralizing barely or less decaying dye compounds. Fungi play a crucial role in degrading and decolorizing organic dyes by enzymes and processes such as absorption, adsorption and aggregation of effluent colorants. The factors affecting the decolorization and biodegradation of dye compounds through fungal bioremediation, such as pH, temperature, dye concentration, agitation, effects of carbon and nitrogen sources, dye structure, enzymes, electron donor and redox mediators are discussed in this review. The review also includes a summary on the mechanism and kinetics of dye degradation as well as recent advances and future perspectives in mycoremediation of dyes., (© 2021 Institute of Bioorganic Chemistry, Polish Academy of Sciences.)
- Published
- 2021
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41. Time-restricted feeding prevents deleterious metabolic effects of circadian disruption through epigenetic control of β cell function.
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Brown MR, Sen SK, Mazzone A, Her TK, Xiong Y, Lee JH, Javeed N, Colwell CS, Rakshit K, LeBrasseur NK, Gaspar-Maia A, Ordog T, and Matveyenko AV
- Abstract
Circadian rhythm disruption (CD) is associated with impaired glucose homeostasis and type 2 diabetes mellitus (T2DM). While the link between CD and T2DM remains unclear, there is accumulating evidence that disruption of fasting/feeding cycles mediates metabolic dysfunction. Here, we used an approach encompassing analysis of behavioral, physiological, transcriptomic, and epigenomic effects of CD and consequences of restoring fasting/feeding cycles through time-restricted feeding (tRF) in mice. Results show that CD perturbs glucose homeostasis through disruption of pancreatic β cell function and loss of circadian transcriptional and epigenetic identity. In contrast, restoration of fasting/feeding cycle prevented CD-mediated dysfunction by reestablishing circadian regulation of glucose tolerance, β cell function, transcriptional profile, and reestablishment of proline and acidic amino acid–rich basic leucine zipper (PAR bZIP) transcription factor DBP expression/activity. This study provides mechanistic insights into circadian regulation of β cell function and corresponding beneficial effects of tRF in prevention of T2DM.
- Published
- 2021
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42. Reducing pain through distraction therapy in small acute paediatric burns.
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Chu H, Brailey R, Clarke E, and Sen SK
- Subjects
- Child, Humans, Pain etiology, Pain prevention & control, Pain psychology, Pain Measurement, Analgesia methods, Burns complications, Pain Management
- Abstract
Introduction: The majority of patients who sustained small (low % total body surface area [TBSA]) burns are assessed in an outpatient setting. This can be a traumatic experience, particularly, for paediatric patients. During the initial assessment pharmacological and non-pharmacological adjuncts, such as distraction therapy, can be employed to provide an environment that may reduce and minimise distress. In this study, we investigated whether distraction therapy reduces objective pain scores during the outpatient assessment of small acute burns in children., Methods: Two cohorts of patients were formed. In the first group (group A), the children received analgesia and routine nursing care. In the second group (group B), the children received specialist distraction therapy in addition to the same analgesia and nursing care. We recorded patient demographics, TBSA, anatomical sites and mechanism of burn. The Wong Baker™ visual analogue scale (VAS) was used to convert perceived pain, as reported by the patient or parent, into a numerical value at three set intervals during the consultation., Results: 50 patients were recruited with 32 patients in group A and 18 in group B. A larger TBSA positively correlated with higher pain scores (p < 0.05). At the start of the consultation the mean pain score without distraction therapy was 1.55 and with specialist distraction therapy was 0.33 (p < 0.05). The mean peak pain score during dressing change without distraction therapy was 6.80 and with specialist distraction was 4.47 (p < 0.05). At the end of the procedure, the mean pain score was 2.12 without distraction therapy and with specialist distraction 1.75., Conclusion: This study of pain scores in small acute paediatric burns has shown that distraction therapy provided by a qualified play specialist can reduce maximal pain by over 2 points on the Wong-Baker™ VAS. Consideration should be given to ensure that distraction therapy is available at all times during initial consultations for children who have sustained small burns., (Copyright © 2021 Elsevier Ltd and ISBI. All rights reserved.)
- Published
- 2021
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- View/download PDF
43. Twelve-month Durability of a Fully-implanted, Nickel-sized and Shaped Tibial Nerve Stimulator for the Treatment of Overactive Bladder Syndrome with Urgency Urinary Incontinence: A Single-Arm, Prospective Study.
- Author
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Gilling P, Meffan P, Kaaki B, MacDiarmid S, Lucente V, Clark M, Sen SK, English S, and Sand PK
- Subjects
- Electric Stimulation Therapy adverse effects, Equipment Design adverse effects, Feasibility Studies, Female, Humans, Male, Middle Aged, Prospective Studies, Prosthesis Implantation, Quality of Life, Self Report, Tibial Nerve, Time Factors, Treatment Outcome, Urinary Incontinence, Urge etiology, Electric Stimulation Therapy instrumentation, Implantable Neurostimulators adverse effects, Urinary Bladder, Overactive complications, Urinary Incontinence, Urge therapy
- Abstract
Objectives: To evaluate the safety and efficacy of the eCoin - a nickel-sized, primary battery-powered, neuromodulation device for the treatment of urgency urinary incontinence which is implanted in the lower leg in a 20-minute procedure under local anesthesia. A feasibility clinical trial was conducted and the results after 1 year of treatment with the eCoin are presented., Methods: A total of 46 participants with refractory urgency urinary incontinence were included in this prospective, single-arm, open-label study. This study was conducted at 7 sites in the United States and New Zealand. Participants in this study were implanted with the eCoin in the lower leg over the tibial nerve and activated after 4 weeks. Bladder diary data and validated quality-of-life instruments, collected at 3, 6, and 12 months' post-activation, were compared to baseline values., Results: Responders were defined as those who had a ≥50% reduction in reported episodes of urgency urinary incontinence. At 12 months', 65% of participants were considered responders with 26% of participants achieving complete continence. The median number of urgency urinary incontinence episodes per day decreased from 4.2 at baseline to 1.7 at 12 months'. Seventy percent of participants reported feeling "better", "much better", or "very much better" on the Likert 7-point maximum scale. One participant experienced a related serious adverse event., Conclusion: The eCoin is a safe and effective treatment for urgency urinary incontinence associated with overactive bladder syndrome, with significant reduction or complete resolution of symptoms and no significant safety concerns., (Copyright © 2021 Elsevier Inc. All rights reserved.)
- Published
- 2021
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44. Mycoremediation and toxicity assessment of textile effluent pertaining to its possible correlation with COD.
- Author
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Rajhans G, Barik A, Sen SK, Masanta A, Sahoo NK, and Raut S
- Abstract
Globally, textile industries are one of the major sectors releasing dye pollutants. This is the first report on the positive correlation between toxicity and chemical oxygen demand (COD) of textile effluent along with the proposed pathway for enzymatic degradation of acid orange 10 using Geotrichum candidum within a very short stretch of time (18 h). Removal efficiency of this mycoremedial approach after 18 h in terms of chemical oxygen demand, biological oxygen demand, total suspended solids, salinity, color and dye concentration in the treated effluent reached to 98.5%, 56.3%,73.2%, 64%, 89% and 87% respectively. Also there was a decrease in pH of the treated effluent. FTIR analysis of the treated effluent confirmed biodegradation. The LCMS analysis showed the degradation of acid orange 10, which was confirmed by the formation of two biodegradation products, 7-oxo-8-iminonapthalene-1,3-disulfonate and nitrosobenzene, which subsequently undergoes stepwise hydrogenation and dehydration to form aniline via phenyl hydroxyl amine as intermediate. The X-ray diffraction studies showed that heavy metal content in the treated effluent has reduced along with decrease in % crystallinity, indicating biodegradation. The connection between toxicity and COD was also inveterated using Pearson's correlation coefficient. Further the toxicological studies indicated the toxicity of raw textile effluent and relatively lower toxic nature of metabolites generated after biodegradation by G. candidum., (© 2021. The Author(s).)
- Published
- 2021
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45. De-colourization of textile effluent using immobilized Geotrichum candidum: an insight into mycoremediation.
- Author
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Rajhans G, Sen SK, Barik A, and Raut S
- Subjects
- Industrial Waste analysis, Laccase metabolism, Textiles, Biodegradation, Environmental, Coloring Agents metabolism, Geotrichum metabolism, Wastewater chemistry, Water Purification methods
- Abstract
Textile effluent is generally complicated to manage because of its extremely noxious and recalcitrant coloured compositions. Mycoremediation is an extensively used strategy for the competent degradation of hazardous pollutants present in textile effluent. Fungus could be immobilized in synthetic or natural matrices. The current study shows the decolourization of the textile effluent by 85·5 and 98·5% within 6 h using suspended and immobilized fungus, Geotrichum candidum with optimized parameters like inoculum size (5%), pH (4·5), and temperature (30°C). To maintain a high biomass of fungal population and enhance the retention of fungal strain in the contaminated sites, the fungi need to be immobilized. Hence, the fungus was immobilized naturally onto the selected inert support that is, coconut fibres by the means of adsorption, where they grew as active films on the fibres after being grown in the culture broth. The optimized process parameters of inoculum size, fibre quantity and agitation speed for immobilized G. candidum were 5%, 2·2 g l
-1 of effluent and 100 rev min-1 respectively. High level of laccase (22 and 25 U l-1 in suspended and immobilized fungal cells treatment respectively) was observed during the process of decolourization and it was found that decolourization was directly proportional to the laccase activity. The UV-vis, FTIR,1 H NMR and GC-MS analyses of treated textile industrial wastewater revealed the degradation of toxic pollutants in the textile effluent and formation of lower molecular weight intermediates. The study revealed a higher efficacy of immobilized G. candidum in comparison to suspended fungal culture, employing ligninolytic enzyme laccase, which catalyzes the degradation/transformation of aromatic dyes in the textile effluent thus decolourizing it., (© 2020 The Society for Applied Microbiology.)- Published
- 2021
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46. Handling climate change education at universities: an overview.
- Author
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Leal Filho W, Sima M, Sharifi A, Luetz JM, Salvia AL, Mifsud M, Olooto FM, Djekic I, Anholon R, Rampasso I, Kwabena Donkor F, Dinis MAP, Klavins M, Finnveden G, Chari MM, Molthan-Hill P, Mifsud A, Sen SK, and Lokupitiya E
- Abstract
Background: Climate change is a problem which is global in nature, and whose effects go across a wide range of disciplines. It is therefore important that this theme is taken into account as part of universities´ teaching and research programs., Methods: A three-tiered approach was used, consisting of a bibliometric analysis, an online survey and a set of case studies, which allow a profile to be built, as to how a sample of universities from 45 countries handle climate change as part of their teaching programs., Results: This paper reports on a study which aimed at identifying the extent to which matters related to climate change are addressed within the teaching and research practices at universities, with a focus on the training needs of teaching staff. It consists of a bibliometric analysis, combined with an online worldwide survey aimed at ascertaining the degree of involvement from universities in reducing their own carbon footprint, and the ways they offer training provisions on the topic. This is complemented by a set of 12 case studies from universities round the world, illustrating current trends on how universities handle climate change. Apart from reporting on the outcomes of the study, the paper highlights what some universities are doing to handle climate issues, and discusses the implications of the research., Conclusions: The paper lists some items via which universities may better educate and train their students on how to handle the many challenges posed by climate change., Supplementary Information: The online version contains supplementary material available at 10.1186/s12302-021-00552-5., Competing Interests: Competing interestsThe authors declare that they have no competing interests., (© The Author(s) 2021.)
- Published
- 2021
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47. Proinflammatory Cytokine Interleukin 1β Disrupts β-cell Circadian Clock Function and Regulation of Insulin Secretion.
- Author
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Javeed N, Brown MR, Rakshit K, Her T, Sen SK, and Matveyenko AV
- Subjects
- ARNTL Transcription Factors genetics, ARNTL Transcription Factors metabolism, Aged, Animals, Circadian Clocks physiology, Diabetes Mellitus, Type 2 metabolism, Female, Gene Expression Regulation drug effects, Gene Expression Regulation physiology, Humans, Insulin-Secreting Cells metabolism, Insulinoma, Interleukin-1beta adverse effects, Interleukin-1beta genetics, Male, Mice, Mice, Knockout, Mice, Transgenic, Middle Aged, Nuclear Receptor Subfamily 1, Group F, Member 1 genetics, Nuclear Receptor Subfamily 1, Group F, Member 1 metabolism, Rats, Sirtuins genetics, Sirtuins metabolism, Circadian Clocks drug effects, Insulin metabolism, Insulin-Secreting Cells drug effects, Interleukin-1beta metabolism
- Abstract
Intrinsic β-cell circadian clocks are important regulators of insulin secretion and overall glucose homeostasis. Whether the circadian clock in β-cells is perturbed following exposure to prodiabetogenic stressors such as proinflammatory cytokines, and whether these perturbations are featured during the development of diabetes, remains unknown. To address this, we examined the effects of cytokine-mediated inflammation common to the pathophysiology of diabetes, on the physiological and molecular regulation of the β-cell circadian clock. Specifically, we provide evidence that the key diabetogenic cytokine IL-1β disrupts functionality of the β-cell circadian clock and impairs circadian regulation of glucose-stimulated insulin secretion. The deleterious effects of IL-1β on the circadian clock were attributed to impaired expression of key circadian transcription factor Bmal1, and its regulator, the NAD-dependent deacetylase, Sirtuin 1 (SIRT1). Moreover, we also identified that Type 2 diabetes in humans is associated with reduced immunoreactivity of β-cell BMAL1 and SIRT1, suggestive of a potential causative link between islet inflammation, circadian clock disruption, and β-cell failure. These data suggest that the circadian clock in β-cells is perturbed following exposure to proinflammatory stressors and highlights the potential for therapeutic targeting of the circadian system for treatment for β-cell failure in diabetes., (© The Author(s) 2020. Published by Oxford University Press on behalf of the Endocrine Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2021
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48. Elucidation of fungal dye-decolourizing peroxidase (DyP) and ligninolytic enzyme activities in decolourization and mineralization of azo dyes.
- Author
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Rajhans G, Sen SK, Barik A, and Raut S
- Subjects
- Biodegradation, Environmental, Geotrichum metabolism, Laccase metabolism, Peroxidase metabolism, Peroxidases metabolism, Textiles, Azo Compounds metabolism, Coloring Agents metabolism, Fungal Proteins metabolism, Geotrichum enzymology, Water Decolorization methods
- Abstract
Aim: The aim of the study is to investigate the efficiency of Geotrichum candidum in the decolourization and mineralization of synthetic azo dyes., Methods and Results: It includes screening of enzymes from G. candidum and its optimization, followed by decolourization and mineralization studies. Decolourization was observed to be maximum in methyl orange (94·6%) followed by Congo red (85%), trypan blue (70·4%) and Eriochrome Black T (55·6%) in 48 h, suggesting the plausible degradation of the azo dyes by G. candidum. The enzyme activity study showed that DyP-type peroxidase has highest activity of 900 mU ml
-1 compared to that of laccase (405 mU ml-1 ) and lignin peroxidase (LiP) (324 mU ml-1 ) at optimized pH (6) and temperature (35°C). Moreover, the rate of decolourization was found to be directly proportional to the production of laccase and LiP, unlike DyP-type peroxidase. Furthermore, mineralization study demonstrated reduction in aromatic amines, showing 20% mineralization of methyl orange., Conclusion: Geotrichum candidum with its enzyme system is able to efficiently decolourize and mineralize the experimental azo dyes., Significance and Impact of the Study: The efficient decolourization and mineralization of azo dyes makes G. candidum a promising alternative in the treatment of textile effluent contaminated with azo dyes., (© 2020 The Society for Applied Microbiology.)- Published
- 2020
- Full Text
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49. Transient Self-assembly Processes Operated by Gaseous Fuels under Out-of-Equilibrium Conditions.
- Author
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Mukhopadhyay RD, Choi S, Sen SK, Hwang IC, and Kim K
- Abstract
Herein we report transient out-of-equilibrium self-assembly of molecules operated by gaseous fuel mixtures. The combination of an active gaseous chemical fuel and an inert gas or compressed air, which assists the degassing of the gaseous fuel from the solution, drives the transient self-assembly process. The gaseous nature of the fuel as well as the exhaust helps in their easy removal and thereby prevents their accumulation within the system and helps in maintaining the efficiency of the transient self-assembly process. The strategy is executed with a rather simple experimental set up and operates at ambient temperatures. Our approach may find use in the development of smart materials suitable for applications such as temporally active gas sensing and sequestration., (© 2020 Wiley-VCH GmbH.)
- Published
- 2020
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50. Changes in burn referrals and injuries during CoVid-19.
- Author
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Chu H, Reid G, Sack A, Heryet R, Mackie I, and Sen SK
- Subjects
- Betacoronavirus, COVID-19, Humans, Referral and Consultation, SARS-CoV-2, Burns, Coronavirus Infections, Pandemics, Pneumonia, Viral
- Published
- 2020
- Full Text
- View/download PDF
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