Table of Contents - Volume 20 Number specialissue

Failure of boilers can cause huge economic loss to the power plants. In high temperature and aggressive working conditions erosion, hot corrosion and abrasions are most responsible factors for failure of boiler steels. Thermal spray coatings are the preferable method to minimize the cause of failures of the boiler steels due to these problems. Among different thermal spray techniques. By utilizing the HVOF process, it is possible to produce coatings with high micro-hardness and low porosity, making it an advanced and effective method that is currently undergoing rapid development. In this paper a review study regarding the performance of thermal spray coatings deposited on boiler steels against the hot corrosion has been presented. The outcomes of this research have the potential to assist in identifying the optimal coating combination and application technique to prevent the deterioration of boiler steels.

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Since the demand for effective and sustainable energy solutions has been on the rise, the field of energy storage has made tremendous strides. Due to their special mix of features, polymer nanocomposites—materials made of polymers and nano-scale fillers have become intriguing materials for energy storage applications. The most current advancements in polymer nanocomposites for energy storage applications are presented in detail in this review study. The work starts with an overview of the fundamental ideas and difficulties surrounding energy storage, then it explores the synthesis and characterization methods employed to create polymer nanocomposites. The many types of nano-fillers used in polymer nanocomposites are then described, including conductive polymers, metal oxides, and carbon-based nano-materials. The main factors influencing how well polymer nanocomposites store energy, such as charge storage capability, conductivity, and cycle stability, are carefully explored. The paper also explores how polymer nanocomposites are used in flexible energy storage systems, lithium-ion batteries, and supercapacitors, among other types of energy storage technology. The impact of interface engineering, morphology, and nanofiller loading on the general effectiveness of polymer nanocomposites is underlined. Additionally, scalability, cost-effectiveness, and environmental impact of polymer nanocomposites for energy storage applications are reviewed, along with their problems and potential for the future. A thorough grasp of the most recent developments in polymer nanocomposites for energy storage applications is the goal of this study, which will make it easier to design and create the next generation of energy storage devices with improved performance and sustainability.

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Projectile fragmentation is a rather well-isolated phenomenon within the complex context of highly energetic heavy-ion collisions with a multibaryon system. The projectile fragmentation study reveals the characteristics of the particles release out from the projectile spectator region. The goal of present investigation is to study the emission possibility of single event, double events and triple events for the single charge, double charge and multiple charge projectile fragments. The observation show that the emission possibility of single, double and triple events is depending on the types of the projectile fragments.

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The pharmaceutical industry is becoming dependent on plants with medicinal value because of their roles in the prevention and treatment of disease. Ten medicinal plant species namely Phyllanthus embelica, Mentha piperita, Ocimum tenuiflorum, Azadirachta indica, Syzgium aromaticum, Dalbergia sissoo, Allium sativum, Psidium guajava, Syzygium cumini and Allium cepa were evaluated for antioxidant potential using spectrophotometric assays. The results indicated that hyroalcoholic extracts of M. piperita showed the highest antioxidant capacity (202.56 ± 1.98 µgAAE/g) and DPPH radical scavenging activity (94% with IC50 value of 561 ± 1.13 μg /mL). Also, the extract of O. tenuiflorum showed 89 % inhibition at 1000 μg/mL concentration. The presence of phenolic and flavonoid compounds may be responsible for the free radical scavenging and antioxidant properties. The findings of the present study suggest that the plants might be exploited as a source of natural antioxidants. Further investigation is still required to identify the phytochemicals responsible for medicinal properties and to understand the mechanism of action of isolated bioactive compounds.

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The most abundant and valuable class of chemicals currently used in industries are referred to as nitroaromatic compounds. These are compounds that include organic molecules and, more importantly, at least one nitro- group in the ring. As we already know, chemistry is currently known for using a variety of fluorescent techniques. Picric acid (O₂N)₃C₆H₂OH) is an organic compound also known as 2, 4, 6-trinitrophenol (TNP), according to the IUPAC. It is extensively used in the industries of dyes, leather, fireworks, and matches. In this review, author tried to explain how to detect picric acid through fluorescent Chemosensor. It helps in the synthesis of fluorescent Nanoscopic objects or compounds.

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To increase the performance of the thermal and flow devices with respect to the heat and flow characteristics in a pipe, different techniques are widely used such as modification in the fluid flow and modifications in the pipe geometries. Several boosting modified tubes, including a finned tube, a tube with ribs, a tube with spirally roughened walls, a corrugated tube, a fluted tube, a helical tube, an elliptical axis tube, and others, act to increase the turbulence in fluid flow and are the examples of modifications in the geometries. As compared to the modification in the pipe geometries with modification in the fluid flow, the fluid flow modifications attract more cost and most are the techniques are not so economical. In the current paper, the comparative analysis is studied between the simple pipe and pipe with dimples for heat and flow characteristics enhancements with the help of computational techniques.  For pipe with dimples, the results were more satisfying as compared with the simple pipe.  The maximum velocity build-up in the dimple pipe was 0.753m/s whereas in the simple pipe it was 0.604m/s, , that means there is a 24.66% increase in velocity in dimple pipe as compared with simple pipe. Also, vorticity was found to be more in the dimple pipe and which was 126000/s as compared with simple pipe  389/s , which means more than 100% increase in the vorticity.  Heat transfer enhancement in the dimple pipe was observed in terms of an increase in the temperature and found to be a maximum of 418 K as compared with simple pipe only 409 K,which means that there is a 17.60% increase in the temperature in the dimple pipe. The computational study concludes that there were enhancements in the heat and flow characteristics of fluid flow in the dimple pipe as compared with the simple pipe.

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