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Cosmic structure growth and perturbation analysis in logarithmic f(Q) gravity
In this work, we explore a cosmological model within the framework of modified gravity, specifically a logarithmic form of f(Q) gravity. Using recent observational datasets including RSD and DESI, we constrain the model parameters via Markov Chain Monte Carlo (MCMC) techniques. Our analysis focuses on both background and perturbation-level cosmological diagnostics, evaluating the evolution of cosmographic parameters and the growth rate of structure through f?8. The results demonstrate consistency with observational data, particularly supporting a quintessence-like accelerated expansion. Additionally, the model addresses the S8 tension and provides insights into the late-time behavior of dark energy. The Author(s) 2025. -
Phenomenology and constraints of an extended modified gravity in Weyl geometry
We explore a novel class of modified gravity theories built upon Weyl geometry, where the Weyl connection introduces additional geometric degrees of freedom beyond general relativity. By promoting the Weyl field to a dynamical entity with a generalized potential, the resulting modified gravity theory naturally incorporates degrees of freedom arising from both the Weyl field and the scalaron embedded in the non-linear Ricci scalar function. Crucially, the field equations remain second-order, ensuring stability and avoiding Ostrogradsky instabilities. To test its viability, we confront this theory with observational data from Dark Energy Spectroscopic Instrument, cosmic chronometers, and Type Ia supernovae, constraining its free parameters through statistical analysis. Our results show strong agreement with observations, supporting a quintessence-like accelerating cosmic expansion and alleviating the Hubble tension. These findings establish modified gravity as a compelling extension of standard cosmology. 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. -
Cosmic bounce in boundary-corrected symmetric teleparallel gravity
This study delves into modified f(Q,B) gravity, with a primary emphasis on solving field equations within the FLRW metric framework. It investigates bouncing scenarios by scrutinizing two nonlinear cosmological models and assesses energy conditions to authenticate bouncing cosmologies as viable alternatives to the conventional Big Bang theory. Furthermore, this analysis extends to examining geometrical parameters to shed light on the accelerating universe, providing significant insights into the implications of modified gravity for our comprehension of cosmic evolution. In addition, a perturbative analysis is performed for both models, showing that a nearly scale-invariant scalar spectral index ns and a suppressed tensor-to-scalar ratio r can be achieved for suitable parameter ranges, thus supporting the observational viability of the proposed bouncing framework. 2025 World Scientific Publishing Company. -
Design of Reconfigurable FRM Channelizer using Resource Shared Non-maximally Decimated Masking Filters
This paper presents a reconfigurable frequency response masking (FRM) wideband channelizer architecture which is characterized by low computational and hardware complexity. The proposed hardware efficient architecture is realized by incorporating resource shared non-maximally decimated filter bank in the implementation of the FRM wideband channelizer structure. The coefficients of the proposed architecture are optimized and made multiplier-free using Pareto based meta-heuristic algorithm in the canonic signed digit (CSD) space for reducing the total power consumption of the architecture. The architecture is finally designed and synthesized using Xilinx Vivado and Cadence RTL Encounter compiler for the area and power analysis and is compared with existing channnelizer architectures. The comparison highlights the advantages of the proposed architecture in terms of hardware complexity, power and workload in realizing sharp wideband channel filters. 2020, Springer Science+Business Media, LLC, part of Springer Nature. -
Multiplier-free Realization of High throughout Transpose Form FIR Filter
This paper presents a multiplier-free realization of the block finite impulse response (FIR) filter in transpose form configuration using binary constant shifts method (BCSM). The proposed architecture is synthesized using Xilinx Vivado and Cadence RTL Encounter compiler for the area and power analysis and is compared with the existing works in the literature. The comparison highlights the advantages of the proposed architecture in terms of power, hardware complexity and throughput for realizing reconfigurable high throughput block FIR filters. 2020 IEEE. -
Software Quality Prediction by CatBoost: Feed-Forward Neural Network in Software Engineering
Software quality is the key aspect of every software organization. Multiple frameworks and algorithms are essential to ensure quality. However, multiple software failures occur uninvited. There are multiple aspects that skew a softwares efficiency. Now the software quality analysis framework mostly focuses on design flaws and test plans done during development. To overcome this problem of software failure, this research proposes a prediction for software efficiency analysis in software engineering using enhanced feed-forward neural network machine learning classification with CatBoost. This research also evaluates the parameters of efficiency of each software component before implementation. This proposed work also analyses the basic aspects that need to be ensured before the design phase of any software. 2024 Taylor & Francis Group, LLC. -
A Comparative Study in Predictive Analytic Frameworks in Big Data
Every information processing sector uses predictive analytic framework in terms of distributed datasets through a variety of applications. These analytic frameworks are effectively used for various analyses of data, parameter, and attributes. Leveraging data to make insightful decisions for maximizing the effectiveness requires the determination of the best predictive framework for any organization. Even a retail unit which wants to scale up its production rely on multiple parameters. These parameters must be analyzed for effective quality control in any domain. Since there are diversities in every domain the data will be in varied form, and these are accumulated as Big Data. These analyses are done using machine learning frameworks. The strategy involved would differ from one domain to another such as in the health care sector the framework might predict the magnitude of patients admitted to the urgent care facility over the upcoming days whereas in the production industry the framework would align quality control measures. This article analyses a few domains and their deployed machine learning impacts in a strategic way. 2023 American Institute of Physics Inc.. All rights reserved. -
Flow Cytometry Analysis of In Vitro Induced Polyploidy in Plants
Polyploidy is the condition of having more than two sets of chromosomes. The mechanism of polyploidy helps in deriving special traits like an increase in biomass, an increase in the size of various organ systems, and secondary metabolite content for the progeny. Various chemical compounds (colchicine, trifluralin, and oryzalin) that have the capacity to alter the mitotic cycle were used for the purpose of inducing polyploidy. Various techniques, such as counting of chromosome number, chloroplast number, determination of pollen diameter, and estimation of leaf stomatal density and size, were developed to analyze the polyploidy of the plants. However, these methods are not reliable for their regular use. Thus, of all the above-mentioned approaches, the estimation of ploidy level by flow cytometry (FCM) has been the most popular over the last few decades. Flow cytometry is now extensively used for the verification of haploidy, aneuploidy, and polyploidy. The ease of sample preparation, fast acquisition, and accurate measurements have made the method popular in the domains of plant cell biology, systematics, evolution, genetics, and biotechnology. The current chapter discusses the induction of polyploidy and its importance in plant breeding. It also emphasizes the importance of FCM in the analysis of polyploidy and enumerates the various polyploidy studies involving the application of FCM. 2023, Bentham Science Publishers. -
Biotic elicitors influence boeravinone B production from cell suspension cultures of Boerhavia diffusa Linn.
Boerhavia diffusa L., (punarnava) is known for its rich, secondary metabolite content and potential pharmacological properties. Boeravinone B, a flavonoid, is a significant plant secondary metabolite found in punarnava, exhibiting various pharmacological properties that translate into anticancer, antioxidant, anti-inflammatory, immunomodulatory and nephroprotective activities. However, the limited production of boeravinone B within the plant poses challenges in meeting market demands. In this study, various biotic components, including filtrates and supernatants of algae, fungi, and bacteria, are employed as elicitors to enhance the production of boeravinone B from the cell suspension cultures of punarnava. Fungal components like yeast extract, Aspergillus niger and Cordyceps militaris, bacteria like Escherichia coli and Bacillus subtilis, as well as Algae such as Valonia utricularis and Spirulina platensis, are utilised to assess their efficiency as elicitors at different day intervals. Results indicate that among all the elicitor treatments, fungal components like yeast extract, C. militaris and A. niger at 100 mg/L, 1 % and 5 % concentrations, administered 6, 6 and 2, days before harvesting, exhibit increased production of boeravinone B by 1.13, 1.14 and 2.63 folds, respectively, when compared to control cultures. Similarly, algae V. utricularis and S. platensis, at 2.5 % concentration and treated before harvesting on Day 6, demonstrate enhanced production of boeravinone B by 1.74 and 4.40 folds compared to control cultures. In addition, the efficiency of various biotic elicitors is examined by quantifying total phenolics and flavonoids in treated cell suspension cultures. These findings have the potential to enhance production strategies and meet the growing demand for this valuable compound with medicinal properties, leveraging easily accessible biotic elicitors. 2024 SAAB -
Polyamines influence the production of Boeravinone-B from cell suspension cultures of Boerhavia diffusa L.
Boerhavia diffusa L. (Punarnava) is an ayurvedic herb with a wide range of phytochemicals and pharmacological activities that have been utilised since antiquity. Boeravinone-B (an isoflavone rotenoid molecule) is one of the most significant secondary metabolites produced in its plant body. Modern plant biotechnological tools have helped in the overproduction of desired plant secondary metabolites from in vitro cell and organ cultures. Elicitation is one such strategy employed for the production of phytochemicals. In the present study, polyamines like putrescine, spermine and spermidine have been used as elicitors for the production of Boeravinone-B. The cell suspension cultures of punarnava have been treated with polyamines at various concentrations, ranging from 0.5 to 20M, at various day intervals of 2, 4 and 6 before the harvesting. The fresh weights, dry weights of cell suspension cultures, their Boeravinone-B content and yield are evaluated. Among all the various polyamine treatments, 2.5M spermidine (SPD) on the 6th day before harvesting shows the highest Boeravinone-B content of 10.88 0.13mgg?1 DW and yield of 110.34mg L?1 respectively, which is a five-fold increment compared to the control cultures (2.16 0.06mgg?1 DW and 16.35mg L?1) respectively. The highest total phenolic content in the cell suspension cultures is observed with 1?M SPD on the 2nd day prior to harvesting (194.25 0.37mgg?1 DW), while the highest levels of flavonoids are observed with 2.5?M SPD on the 6th day before harvesting (86.85 0.26mgg?1 DW). 2023, The Author(s), under exclusive licence to Springer Nature B.V. -
Production of Boeravinone-B, total phenolic, flavonoid content and antioxidant activity from callus cultures of Punarnava (BoerhaviadiffusaL.)
Boerhavia diffusa L. (Punarnava) is a medicinal herb, rich in diversified plant secondary metabolites used in curing various health ailments. Boeravinone-B is one of the important phytochemicals reported in Punarnava, possessing various pharmacological activities. It belongs to the family of rotenoids, belonging to the isoflavone group. Production of Boeravinone-B from the Punarnava through conventional propagation is comparatively very low, and alternative interventions are of utmost importance to meet the growing demand. In view of this, the present study aims to develop biotechnological approaches like cell/tissue culture as a substitute strategy for the accumulation of biomass and Boeravinone-B biosynthesis. Callus was established from leaf explants of Boerhavia diffusa L. when cultured on MS semi solid medium fortified with varied concentrations and combinations of auxins and cytokinins. The callus induced on Murashige and Skoog medium (MS medium) supplemented with 5.0 ppm 2,4-Dichlorophenoxyacetic acid (2,4-D) favored the highest production of Boeravinone-B analyzed through High-performance Liquid chromatography (HPLC) and it was found to be 673.95 ?g g-1 Dry weight (DW). The total phenolic and flavonoid content were determined for the callus extracts and the results showed that callus induced on 5.0 ppm 2,4-D medium showed the highest phenolic and flavonoid content, which was 63.48 mg g-1 Gallic acid equivalent (GAE) Dry weight (DW), and 30.22 mg g-1 Quercetin equivalent (QE) DW. Similarly, antioxidant activities (radical scavenging, metal chelating, and reducing power) were performed, and it was found that callus induced on 5.0 ppm 2,4-D showed the highest anti-oxidant potential. Radical scavenging activity was found to be 91.1%, and 74% of metal chelating activity was recorded, and a similar trend was observed with respect to reducing power as well. The results of the present study lay foundation for optimization and subsequent large-scale production of Boeravinone-B from callus/cell suspension cultures. The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited (https://creativecommons.org/licenses/ by/4.0/) -
Phytochemical, pharmacological and tissue culture studies of some important species of the genus Barleria L. (Acanthaceae) - a review
Ayurvedic sciences helped the early humans to overcome chronic dangerous diseases. There are thousands of varieties of herbs and medicinal plants used to overcome such dreadful diseases. The genus Barleria L. belongs to family Acanthaceae, a medicinally significant group of plants having diversified phytochemicals used for different pharmacological properties. It has been utilized since ancient times for medicinal purposes. It has many plant secondary metabolites such as terpenes, flavonoids, lignins, alkaloids, particularly the iridoid glycosides. The secondary metabolites extracted from Barleria spp. show potential pharmacological activities viz., anti-microbial, anti-inflammatory, anti-oxidant, anti-fertility, anti-arthritic and anti-ulcer activity. In view of these, present review is focused on the phytochemistry, pharmacology and tissue culture studies of some of the important species of the genus Barleria L. Sudheer & Praveen (2021). -
Role of plant tissue culture medium components
The plant tissue culture technique is one of the most acquainted techniques and has been practiced since 1902 for the development of disease-free plants with desired quality, at a larger production rate within a short span of time, irrespective of the season. Each plant has its own morphology and nutritional requirements. Moreover, the nutritional requirement for the tissues in each part of the plant varies. Thus, for the optimal growth of the desired plant, the composition and choice of the suitable media are crucial factors. The formulation of the nutrient medium for the specific tissue and the specific plant plays a vital role in the development of suitable plant tissue culture techniques. This chapter discusses the main components of the plant tissue culture media: basic components which include macroelements, microelements, nitrogen sources (including amino acids), carbon sources, organic supplements (mainly vitamins and other supplements), growth regulators like auxins, cytokinins, gibberellins, abscisic acid, ethylene, and solidifying agents. The basic components have to be incorporated at a fixed concentration. The plant growth regulators are supplemented for organogenesis and the balance between the growth regulators depends on the type of tissue culture technique adopted. The additional supplements are incorporated into the media to achieve specific responses which include activated charcoal, antioxidants, ethylene inhibitors, and complex organic additives, and antibiotics/antifungal agents are supplemented to prevent plant loss due to contamination. The chapter also emphasizes the sterilization techniques and their importance in the plant tissue culture medium. The significance of the adoption of automated media preparation and incorporation of nanoparticles in the tissue culture media is also discussed. 2022 Elsevier Inc. All rights reserved. -
A comprehensive review on tissue culture studies and secondary metabolite production in Bacopa monnieri L. Pennell: a nootropic plant
Bacopa monnieri L. Pennell, commonly known as Brahmi, is an important medicinal plant that belongs to the family Plantaginaceae. Brahmi is rich in innumerable bioactive secondary metabolites, especially bacosides that can be employed to reduce many health issues. This plant is used as a neuro-tonic and treatment for mental health, depression, and cognitive performance. Brahmi is also known for its antioxidant, anti-inflammatory, and anti-hepatotoxic activities. There is a huge demand for its raw materials, particularly for the extraction of bioactive molecules. The conventional mode of propagation could not meet the required commercial demand. To overcome this, biotechnological approaches, such as plant tissue culture techniques have been established for the production of important secondary metabolites through various culture techniques, such as callus and cell suspension cultures and organ cultures, to allow for rapid propagation and conservation of medicinally important plants with increased production of bioactive compounds. It has been found that a bioreactor-based technology can also enhance the multiplication rate of cell and organ cultures for commercial propagation of medicinally important bioactive molecules. The present review focuses on the propagation and production of bacoside A by cell and organ cultures of Bacopa monnieri, a nootropic plant. The review also focuses on the biosynthesis of bacoside A, different elicitation strategies, and the over-expression of genes for the production of bacoside-A. It also identifies research gaps that need to be addressed in future studies for the sustainable production of bioactive molecules from B. monnieri. 2022 Informa UK Limited, trading as Taylor & Francis Group. -
Photocatalytic and antimicrobial properties of Boerhavia diffusa bio-callus synthesized Silver nanoparticles
Plant tissue culture plays a pivotal role in plant biotechnology, and offers innovative and reliable avenues for synthesizing nanoparticles. The approach is safe, replicable, and efficient for therapeutic and environmental sustainability. Despite the proven efficiency of green synthesis approaches, plant callus extracts for nanoparticle synthesis remain moderately investigated. The current study bridges the gap by synthesizing ecofriendly silver nanoparticles (Ag-NPs) using callus extracts of Boerhavia diffusa (Punarnava), an important medicinal plant with proven potential pharmacological properties. These synthesized Boerhavia diffusa-mediated Ag-NPs (BD-Ag-NPs) were characterized using UV-Vis spectroscopy, SEM, FTIR, and XRD. Spectral analysis showed spherical-shaped BD-Ag-NPs with an average size of 9 nm at wavelength 420 nm. Energy-dispersive X-ray (EDX) analysis revealed that silver ions constituted 51.78 % of the total weight of the nanoparticle solutions, while the crystalline structure of the BD-Ag-NPs was confirmed through XRD. Phytoconstituents present in the callus were utilized for capping and the reduction of Ag ions to Ag-NPs was confirmed through FTIR analysis. In addition, BD-Ag-NPs exhibited functional properties like textile dye degradation and broad-spectrum antimicrobial activities against bacterial and fungal pathogens. The current study highlights the potential of employing callus-derived nanoparticles for sustainable environment and biomedical applications. This study advances the application of green nanoparticle synthesis using tissue culture systems and makes significant contributions to addressing global challenges. 2025 The Authors -
Nano Zinc Oxide Particle Synthesis from Bio-Waste Selaginella willdenowii Leaf Extract: A Multi-Faceted Approach for Environmental and Biomedical Applications
Selaginella willdenowii, a commonly used greenhouse fern, was often used as a biowaste to synthesize zinc oxide nanoparticles (ZnO NPs) in an eco-friendly and cost-effective way. UV-Visible spectra studies were carried out to confirm the synthesis of S. willdenowii-mediated ZnO NPs (SW-ZnO NPs), and a peak at 367nm with a sharp band gap of 3.415eV was observed. The X-ray diffraction analysis indicated that the crystalline size of the synthesized SW-ZnO NPs was 11.971nm. The phytochemicals present in the extracts and the compounds involved in the reduction of metal to nanoparticles were determined by Fourier Transform Infrared analysis. Scanning electron microscopy was utilized to analyze the surface morphology and size of the obtained SW-ZnO NPs. The examination revealed that they exhibited a hexagonal shape, with an average size falling within the range of 17-23nm. Under ultra-violet light, reactive blue 220 and reactive yellow 145 dyes showed 78.06% and 60.14% degradation, showing potential photocatalytic degradation activity. The synthesized SW-ZnO NPs also exhibited antimicrobial activity against bacterial strains (Escherichia coli and Bacillus subtilis) and fungal cultures (Candida tropicalis and Candida albicans) showed cytotoxic activity against Hep-G2 cell lines. Our results suggest the green synthesized SW-ZnO NPs have potential photocatalytic, antimicrobial and cytotoxic potential. 2024 World Scientific Publishing Company. -
Microalgae as Biorefineries for Biofuel and Bioenergy Production: Recent Developments and Future Prospects
Microalgae boasts unique advantages regarding biofuel production, where researchers have made significant strides in increasing biofuel yields while reducing costs by improving lipid profiles in various microalgal strains, incorporating nano-additives, and improving extraction techniques. They have achieved this through genetic engineering, nanotechnology, and innovative cultivation techniques, optimizing the entire process. Moreover, microalgae are rich in bioactive compounds, and this chapter emphasizes advanced methods for extracting and purifying compounds like carotenoids, phycobiliproteins, polysaccharides, and omega-3 fatty acids, which have broad applications in food, medicine, and various industries. In energy production, microalgae generate renewable and eco-friendly energy through microbial fuel cells, employing techniques such as thermochemical liquefaction and producing energy from fermentation processes. Advancements in microalgae-based photobioreactors and strategies to improve photosynthetic efficiency further contribute to the efficiency and scalability of energy production. The book chapter highlights the importance and sustainability of microalgae in addressing energy and environmental challenges. By harnessing the latest advancements in biofuel production, valuable product synthesis, and renewable energy generation, microalgae have the potential to steer in a greener and brighter future. Their rapid growth, carbon dioxide absorption, and valuable compound synthesis make them a powerful tool in our pursuit of sustainable solutions. Embracing the potential of microalgae can lead us to an environmentally friendly and economically prosperous future. The Author(s), under exclusive license to Springer Nature Switzerland AG 2025. -
A multi-frequency study of the candidate doubledouble radio galaxy J2349?0003 with a possible misalignment
We present a multi-frequency analysis of the candidate doubledouble radio galaxy (DDRG) J2349?0003, exhibiting a possible lobe misalignment. High-resolution uGMRT observations at Bands 3 and 4 reveal a complex radio morphology featuring a pair of inner and outer lobes, and the radio core, while the Band 5 image detects the core and the compact components. The positioning of both pairs of lobes with the central core supports its classification as a DDRG. Spectral age estimates for the inner and outer lobes indicate two distinct episodes of active galactic nucleus (AGN) activity interspaced by a short quiescent phase. The possible compact steep-spectrum nature of the core, together with its concave spectral curvature, suggests ongoing or recent jet activity, suggesting the possibility that J2349?0003 may be a candidate triple-double radio galaxy. With a projected linear size of 1.08 Mpc, J2349?0003 is classified as a giant radio galaxy (GRG), although its moderate radio power (?1024 WHz-1) suggests a sparse surrounding environment. Arm-length (R?) and flux density ratios (RS) indicate environmental influences on source symmetry. The observed lobe misalignment and the presence of nearby galaxies in the optical image suggest that merger-driven processes may have played a key role in shaping the sources evolution. Indian Academy of Sciences 2025. -
Investigation of the Axe-shaped Radio Galaxy J1051+5523 with uGMRT
We present a multifrequency study of the bent-tail radio galaxy J1051+5523, located in the galaxy cluster WHL J105147.4+552309. This wide-angle tail (WAT) galaxy exhibits a complex radio morphology, characterized by a right-angled bend in the northern jet, which resembles an axe, and multiple kinks in the southern jet, as observed in the deep uGMRT radio observations. The radio power of J1051+5523 at 150 MHz is estimated to be, placing it in the transition zone between FRI and FRII radio galaxies. The spectral index map reveals a flat core and relatively flat lobes, which may indicate ongoing particle acceleration or a relatively young population of relativistic electrons in the lobes. Further, we estimate the equipartition magnetic fields, and spectral ages of the northern and southern lobes to be approximately 150 and 153 Myr, respectively, suggesting a long-lived radio source with sustained active galactic nucleus (AGN) activity. A relative velocity of 278 2643 is obtained for the host galaxy. Due to the large uncertainty associated with the relative velocity estimates, the contribution of ram pressure to the jet bending remains inconclusive. The low mass of the host cluster () and the lack of diffuse X-ray emission indicate a reduced likelihood of major mergers, but minor mergers or interactions remain possible. We propose that the observed WAT morphology of J1051+5523 is likely shaped by a combination of ram pressure and/or buoyant forces within the cluster environment. 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. -
Knowledge transfer: An information theory perspective
Personalization and codification are two dominant knowledge transfer (KT) mechanisms found in organizations and organizational networks. This paper proposes a theoretical model of KT that explains organizations' choice of KT mechanisms in terms of the tacitness of knowledge being shared and the corresponding information content. Shannon's entropy, an information theoretical concept, has been used to define the constructs of tacitness and information content and explain their influence on the choice of the corresponding KT mechanisms. Contributions of the paper include (a) use of information content as a predictor of the choice of KT mechanisms, (b) development of an expression for tacitness, and an intuitive explanation of the tacit-explicit continuum, (c) characterization of product variety in terms of information content, and (d) development of a KT theoretical model that can be operationalized for predicting the choice of KT mechanisms in real-life situations. 2017 The OR Society.