Controlling spiral wave dynamics of the BZ system in a modified Oregonator model: From suppression to turbulence.

Spirals are a special class of excitable waves that have its significance in the understanding of cardiac arrests and neuronal transduction. In a theoretical model of the chemical Belousov-Zhabotinsky reaction system, we explore the dynamics of the spatiotemporal patterns that emerge out of competing reaction and diffusion phenomena. By modifying the existing mathematical models of the reaction kinetics, we have been able to explore the explicit effect of hydrogen ion concentration in the system, so as to achieve various regimes of wave activity, from stable spirals to oscillation death.

MXene Nanoribbon Aerogel-Based Gradient Conductivity Electromagnetic Interference Shields with Unprecedented Combination of High Green Index and Shielding Effectiveness.

The desire to reduce secondary pollution from shielded electronics devices demands electromagnetic interference (EMI) shields with high green index (GI), which is the ratio of absorbance over reflectance. Achieving high GI values simultaneously with high shielding effectiveness (SE) over 50 dB is a serious unresolved challenge. Reducing the impedance mismatch between the shield and free space is the key to reducing the reflection of incoming radiation and enabling more penetration into the body of the shield for absorption.

Development of 17-4 PH Stainless Steel for Low-Power Selective Laser Sintering.

Selective laser sintering (SLS) is one of the prominent methods of polymer additive manufacturing (AM). A low-power laser source is used to directly melt and sinter polymer material into the desired shape. This study focuses on the utilization of the low-power laser SLS system to successfully manufacture metallic components through the development of a metal-polymer composite material.

Critical raw material-free multi-principal alloy design for a net-zero future.

Refractory High-Entropy Alloys (RHEAs), such as NbMoTaW, MoNbTaVW, HfNbTaZr, ReHfNbTaW, NbTiAlVTaHfW, TiNbMoTaW (x = 0, 0.25, 0.5, 0.

Adsorption of emerging pollutants utilizing chitosan derivatives: Recent advances and future perspective.

Globalization resulted in technological advancement, and urban population growth. Consequently, pollution emerged as an imminent risk to the survival of all species on Earth. Consequently, on a worldwide basis, sustainability become a major issue for legislators.

Conductive Textile Embedded with Bioinspired Wettability for Prolonged and Energy Efficient Thermal Management.

The design of electrically conductive textiles appears to be a promising approach to combat the existing challenge of deaths caused by severe cold climates around the globe. However, reports on the scalable fabrication of tolerant conductive textiles maintaining a low electrical resistance with an ability for unperturbed and prolonged performance are scarce. Here, a breathable and wrappable water-repellent conductive textile (water-repellent CT) with electrothermal and photothermal conversion abilities at low external voltage and in weak solar light is introduced, respectively.

Fundamental Understanding of Bio-Nano Interface of Lysozyme on Polyphenol Coated Silver Nanoparticles: Mechanistic Insights into the Effect of Protein Corona on the Antibacterial Efficacy.

Recent times have witnessed revolutionary progress in the design and development of functionalized nanomaterials as promising tools for biomedicinal applications. However, the gap in the fundamental understanding of the "biological responses" of the nanomaterials after the formation of "protein-corona" when it is exposed to the body system has drawn a thin line from its discoveries to real clinical trial. In this article we have synthesized two different silver NPs capped with the polyphenols of (guava) leaf extract and the other with one of its major polyphenolic groups, morin.

An electrically conductive dinuclear aluminium complex for the fabrication of a Schottky diode.

Electrical performances of a biphenyl-derived amido Schiff base ligand L and its dinuclear Al(iii) complex (complex 1) were investigated in a metal-semiconductor (MS) junction. Electrical studies revealed that complex 1 significantly enhanced the electrical conductivity and improved the characteristics of a Schottky barrier diode (SBD). The - characteristics demonstrated that complexation of ligand L with Al(iii) ion increased the conductivity by two orders of magnitude (conductivity of L = 1.

Fluorometric Turn Off Detection of Cu and Pd Ions Using 1-(Imidazo[5,1-a]isoquinolin-3-yl)naphthalen-2-ol.

The fused heterocycle 1-(imidazo[5,1-a]isoquinolin-3-yl)naphthalen-2-ol (LH) has been synthesized and characterized by spectroscopic methods. Probe LH upon irradiation with λ = 336 nm exhibited strong fluorescence with λ = 437 nm in MeOH/HEPES buffer (5 mM, pH = 7.4, 2:8, v/v).

Exploring Moiré Superlattices and Memristive Switching in Non-van der Waals Twisted Bilayer BiOSe.

The discovery of moiré physics in two-dimensional (2D) materials has opened new avenues for exploring unique physical and chemical properties induced by intralayer/interlayer interactions. This study reports the experimental observation of moiré patterns in 2D bismuth oxyselenide (BiOSe) nanosheets grown through one-pot chemical reaction methods and a sonication-assisted layer separations technique. Our findings demonstrate that these moiré patterns result from the angular stacking of the nanosheets at various twist angles, leading to the formation of moiré superlattices (MSLs) with distinct periodicities.

Ribosome Biogenesis, Altered Metabolism and Ribotoxic Stress Response in Pancreatic Ductal Adenocarcinoma Tumor Microenvironment.

Pancreatic ductal adenocarcinoma (PDAC) is a lethal malignancy with a poor overall survival rate. Cellular stress response pathways promoting cancer cell fitness in harsh tumor microenvironment (TME) play a critical role in cancer growth and survival. The influence of oncogenic Kras, multi-functional heterogeneous cancer-associated fibroblasts (CAFs), and immunosuppressive TME on cancer cells makes the disease more complex and difficult to treat.

Flow environment affects nutrient transport in soft plant roots.

This work estimates Michaelis-Menten kinetics parameters for nutrient transport under varying flow rates in the soft roots of Indian mustard () using a plant fluidic device. To find the metallic components within the roots, inductively coupled plasma mass spectrometry (ICP-MS) analysis was performed. The flow rate-dependent metabolic changes were examined using Raman spectral analysis.

State-of-the-art advances in homogeneous molecular catalysis for the Guerbet upgrading of bio-ethanol to fuel-grade bio-butanol.

The upgrading of ethanol to -butanol marks a major breakthrough in the field of biofuel technology, offering the advantages of compatibility with existing infrastructure while simultaneously offering potential benefits in terms of transport efficiency and energy density. With its lower vapour pressure and reduced corrosiveness compared to ethanol, -butanol is easier not only to manage but also to transport, eliminating the need for costly infrastructure changes. This leads to improved fuel efficiency and reduced fuel consumption.

Analytical and Applied Copyrolysis of L. and Polyethyelene Terephthalate Plastic for Hydrocarbon-Rich Bio-oil.

The current investigation focuses on the copyrolysis of L. (a nonedible oilseed, also known as Nahar) and polyethyelene terephthalate (PET) plastic waste to gain insights into the composition of pyrolysates and the thermal decomposition of complex and mixed feedstocks. The physicochemical properties of the feedstocks were studied through thermogravimetric analysis at a heating rate of 15 °C min, bomb calorimetry, and proximate/ultimate analysis.

Unveiling the Cytotoxic Potential of Quercetin-Loaded Magnetic Bacterial Bots against Cervical Cancer.

Bacterial bots are potent vehicles in cancer theranostics where bacteria are used typically as cargos for drug delivery. However, living bacteria themselves may aid in their efficiency in killing the tissues. For example, living bacteria may be functionalized with magnetic and luminescent nanoparticles along with drugs in order to achieve the targeted delivery and release of payloads that would include the bacteria.

Sustainable remediation of abandoned coal mines using vermicompost: a case study in Ledo coal mine, India.

Coal mining in India, especially open-cast mining, substantially strengthens the economy while concurrently causing environmental deterioration, such as soil pollution with toxic chemicals and heavy metals. This study sought to examine the efficacy of vermicompost as a remediation technique for Mine Tailing Soil (MTS) in the Ledo Coal Fields. During a 120-day duration, different concentrations of vermicompost (20%, 30%, and 40%) were administered to MTS, and the impacts on soil physicochemical parameters, fertility, and plant growth were evaluated.

Therapeutic Advantages of Nanoparticle-Impregnated Lysozyme Conjugates toward Amyloid-β Fibrillation and Antimicrobial Activity.

The interaction of protein with nanoparticles (NPs) of varying shape and/or size boosts our understanding on their bioreactivity and establishes a comprehensive database for use in medicine, diagnosis, and therapeutic applications. The present study explores the interaction between lysozyme (LYZ) and different NPs like graphene oxide (GO) and zinc oxide (ZnO) having various shapes (spherical, 's', and rod-shaped, 'r') and sizes, focusing on their binding dynamics and subsequent effects on both the protein fibrillation and antimicrobial properties. Typically, GO is considered a promising medium due to its apparent inhibition and prolonged lag phase for LYZ fibrillation.

Photo-induced nitroxyl anion/HNO release from a nitrosyl complex of Mn(II)-porphyrinate.

A nitrosyl complex of Mn-porphyrinate, 1 has been synthesized and characterized. It was found to donate a nitroxyl anion (NO) to suitable acceptors in dichloromethane solution in the presence of visible light. The evolution of NO and the characteristic reaction with PPh in the presence of H confirms the NO/HNO donation.

2-Amidophenolate and 2-Iminosemiquinone Radical-Coordinated Vanadyl Complex as Catholyte for Non-Aqueous Redox-Flow Batteries.

Fulfilment of energy demand by utilizing renewable energy sources that do not contribute to the production of greenhouse gases is a step forward in mitigating global warming. However, with the energy sources being intermittent in nature, renewable energy needs to be stored effectively on a grid scale. In this context, the development of redox-flow batteries has emerged as a promising technology where charging and discharging processes are accomplished by the redox shuttling of the electrolytes, namely anolytes and catholytes.

Rabies in rural northeast India: A case report emphasising the urgency of the One Health approach.

Dog-mediated rabies is endemic in India. The country records the highest mortality due to dog-bite-related rabies despite the availability of interventions to prevent deaths. We present a case study of the death of a 59-year-old man in a suburban town of Northeast India after a dog bite from an owned pup.

Influence of Asymmetrical Ligand Substitution on the Formation, Stability, and Reactivity of Ruthenium(III)-Hypochlorite Complexes.

Hypohalites are commonly generated in biological systems, mostly with functions related to defense and immune system response. These hypohalites can bind to metal centers and are known for their strong oxidizing properties that play crucial roles in various biological processes. Herein, we report the synthesis, characterization and reactivity of novel biomimetic Ru(III)-hypochlorite complexes and focus the work on the electronic effects associated with the incorporation of methyl groups in a pentadentate ligand framework in an asymmetric fashion.

Yeast Dnm1 causes altered organelle dynamics and sheds light on the human DRP1 disease mechanism.

Mitochondrial morphology is a result of regulated opposite events called fission and fusion and requires the GTPase, dynamin-related protein 1 (DRP1/Dnm1), or its homologs. A recent clinical report identified a heterozygous missense mutation in the human DRP1 that replaces Glycine (G) 149 with Arginine (R) and results in debilitating conditions in the patient. In this study, we mimicked this mutation in yeast Dnm1 (G178R) and investigated the impact of the pathogenic mutation on the protein's function.

Modulation of Donor in Purely Organic Triplet Harvesting AIE-TADF Photosensitizer for Image-guided Photodynamic Therapy.

Image-guided photodynamic therapy is acknowledged as one of the most demonstrative therapeutic modalities for cancer treatment because of its high precision, non-invasiveness, and improved imaging ability. A series of purely organic photosensitizers denoted as BTMCz, BTMPTZ, and BTMPXZ, have been designed and synthesized and are found to exhibit both thermally activated delayed fluorescence and aggregation-induced emission simultaneously. Experimental and theoretical studies are combined to reveal that modulation of the donor of the photosensitizer enables distinct thermally activated delayed fluorescence via a second-order spin-orbit perturbation mechanism involving lowest singlet charge-transfer and higher-lying triplet locally excited states, respectively.

Ferric Chloride Mediated Dearomative Spirocyclization of Biaryl Ynones: Synthesis of 3,3-Spiroindanones.

Ferric chloride mediated dearomative spirocyclization of biaryl ynones for the synthesis of new series of densely functionalized 3,3-spiroindanone derivatives has been reported. This study is the first to describe the regioselective synthesis of a five-membered ring from biaryl ynones. The scope of the reaction is broad and the spirocyclic products were obtained in moderate to good yields (up to 87 %) and with high stereoselectivities.