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371 articles for “absorbance”
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Review of the Impact of Artificial Roughness in Solar Air Heaters
Abstract: Artificially roughening the heated surface of solar air heaters is a practical and affordable method to significantly increase the rate of heat transmission. Roughing up the surface can improve the design of a solar air heater (SAH) duct. The use of baffles, fins, ribs and grooves improves heat transmission in the SAH. Various efforts were made to improve heat transfer rates through duct employing these components, which resulted in significant …
Published in Trends in Machine design · Vol. 11, Issue 1, 2024 · pp. 1–9 Read article
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Differential Model of Wave Vibration on Strings and Rods
Abstract: Vibration, as a physical phenomenon, plays a multifaceted role in both natural and engineered systems. Beyond its essential contribution to communication through sound and speech, it finds critical application in various technological domains. For instance, in the design of stringed musical instruments such as violins and guitars, precise manipulation of string vibrations defines tonal quality and musical resonance. Similarly, metal rods in tuning forks exhibit vibrational properties that are finely …
Published in Research & Reviews : Journal of Physics · Vol. 14, Issue 1, 2025 · pp. 17–21 Read article
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Effect of the U.V. Irradiation on the Aqueous Solution of Dye (i.e. Cresol Purple)
Abstract: This study aimed to estimate the effect of the U.V. irradiation on the aqueous solution of cresol purple. Then study the effect of the activation energy of each electron transfere on the absorbance and λmax values. The absorbance and λmax values of the selective λmax solutions were chanced in most solutions, where the U.V radiation gave different values at different irradiation periods, most of solution gave low values of absorbance …
Published in Emerging Trends in Chemical Engineering · Vol. 8, Issue 1, 2021 · pp. 30–35 Read article
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Infrared Spectroscopic Studies on Multiwalled Carbon Nanotubes Reinforced Acrylonitrile Butadiene Styrene Composites
Abstract: AbstractFourier Transformed Infrared (FT-IR) Spectroscopic analysis is an effective technique to captures the response of the molecular motions such as stretching, bending and torsional vibrations of materials. In this study, FTIR analysis has been done on two different grades of multiwalled carbon nanotubes (MWCNT) C100 and NC7000. NC7000 grade MWCNT has a higher degree of crystalinity and shows 60% higher absorbance in the wavelength range of 600-3600 cm-1. These two …
Published in Journal of Polymer & Composites · Vol. 2, Issue 3, 2023 · pp. 15–22 Read article
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Design and Analysis of Double Wishbone Suspension for Formula Student Car
Abstract: By getting to know the fundamental ideas of suspension systems and mechanical procedure, this project aims to present an insight in to designing the car suspension and its mathematical model with the chassis and make foundation in vector theory was established and applied to the new method so as to work out the positions of all exterior elements relative to the chassis. Again when the geometry and layout of the …
Published in Trends in Machine design · Vol. 8, Issue 2, 2021 · pp. 30–40 Read article
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Comparative Study of Dosimetry Methodology and Software Tools for Personalized Radionuclide Therapy
Abstract: Purpose: The aim of this review article is to collate the detailed insight of different dosimetry methodology and non-commercial /commercial dosimetry software tools, along with clinical study explored by specific authors, published in recent peer-review journals. The present work is segmented in three sections: i) Literature review of various dosimetry methodologies to evaluate absorbed dose in personalized radionuclide/ radiopharmaceutical therapy. ii) Technical as well as comparative information related to commercial …
Published in Research and Reviews : A Journal of Medical Science and Technology · Vol. 10, Issue 3, 2021 · pp. 9–27 Read article
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Formation of hygiene and cosmetic wipes using herbal formulation
Abstract: Increase in the awareness among the consumers against the health and hygiene products has increase the demand of nonwovens. There is huge increase in hygiene products in the recent COVID-19 pandemics. The hygiene products help the control the moisture as well as acts as a good disinfectant against the pathogens present on the skin. In the present study wet wipes formulations are being done using herbal formulations. Xanthum gum is …
Published in Research and Reviews: A Journal of Toxicology · Vol. 11, Issue 3, 2024 · pp. 1–8 Read article
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Numerical Simulation of Efficient Two-dimensional Based Perovskite Solar Cell by Changing the Hole Transporting Layer
Abstract: In the designing of Photo Solar Cell (PSC) the choice of suitable electron transport layer (ETL)/ absorber layer / hole transport layer (HTL) with optimal thickness is very important. In the present device configuration of perovskite solar cell is TCO/ electron transport layer (TiO2)/ absorber layer (CH3NH3PbI3)/ hole transport layer (MoTe2/MoSe2/MoS2)/ metal back contact (Au). In the suggested device Hole transport layer was changed one by one with the MoTe2, …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 23, Issue 3, 2021 · pp. 11–19 Read article
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Experimental Analysis of Solar Dryer
Abstract: Agro-commodities are most commonly dried in open air. For easy usage, low cost dryer in clear and rainy day was the need by many farmers. Present study was intended to study, fabricate and test the solar dryer for drying fruits and vegetables. A model was designed for drying chillies and potatoes by direct solar energy in line with auxiliary drying chamber. Proposed method of drying is comparatively fast and clean. …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 11, Issue 1, 2024 · pp. 9–17 Read article
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Exploring Molecular Spectroscopy: Insights into Chemical Structures and Interactions
Abstract: A key tool for understanding the dynamics, structure, and interactions of molecules is molecular spectroscopy. This abstract outlines the key principles and techniques employed in modern molecular spectroscopy, highlighting its significance in various scientific disciplines. The focus is on the principles of absorption, emission, and scattering of electromagnetic radiation by molecules, leading to valuable insights into molecular properties. The abstract begins by discussing the basic principles of molecular spectroscopy, emphasizing …
Published in International Journal of Photochemistry and Photochemical Research · Vol. 1, Issue 1, 2023 · pp. 11–16 Read article
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Performance Assessment of External Source-Driven Binary Vapor Cycles with Ammonia-Water and Trans-Critical CO2: The Impact of Reheating and Pressure Variations
Abstract: This study examines the thermodynamic performance of binary vapor cycles, specifically analysing two working fluid combinations: ammonia-water mixtures and trans-critical carbon dioxide (CO2). The study aims to evaluate their efficiency, applicability, and potential for improving energy conversion systems in various thermal applications. The analysis investigates how incorporating reheating processes and adjusting operating pressures impact system performance. These two parameters play a critical role in enhancing cycle efficiency and maximizing energy …
Published in Journal of Thermal Engineering and Applications · Vol. 12, Issue 2, 2025 · pp. 42–49 Read article
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Assessment of Hygiene Degradation and Expiry Indicators in Household Bedding Products
Abstract: Household bedding products such as pillows, bedsheets, blankets, and mattresses play a crucial role in ensuring comfort, sleep quality, and overall health. However, prolonged use without timely replacement or proper maintenance can result in hygiene degradation, leading to the accumulation of dust, allergens, microorganisms, and chemical wear. This study aims to assess the factors contributing to hygiene decline and to identify reliable indicators of expiry for common bedding items. The …
Published in International Journal of Environmental Noise and Pollution Control · Vol. 4, Issue 1, 2026 · pp. 33–47 Read article
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Suspension System with Combined Leaf and Helical Spring: A Review
Abstract: A good suspension system of any automobile vehicle must have minimum deflection, minimum weight, low maintenance and low operating cost with some other fine properties. Springs are major element of any suspension system and first line of its defense. If the suspension springs are rigid enough, they will not absorb road shocks efficiently, and if they are more flexible, then they will keep vibrating for a longer time even after …
Published in Journal of Automobile Engineering and Applications · Vol. 3, Issue 2, 2016 · pp. 28–36 Read article
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Comparative Study of Parabolic Leaf Spring and Different Materials
Abstract: AbstractSprings are used in automobile applications as they expand in size when loaded and regain its original shape when removed. They also absorb vibrations, shocks and loads utilizing damping, they absorb the energy in the form of potential energy. Springs’ capacity to absorb and store more strain energy makes the suspension system more comfortable. Conventional spring and parabolic springs are widely utilized springs and are currently the topic of research …
Published in Journal of Materials & Metallurgical Engineering · Vol. 7, Issue 2, 2017 · pp. 23–27 Read article
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The Use of Retroperitoneum: Making A Wrapping for Splenic Salvage in Traumatic Splenic Rupture
Abstract: Objective: We have studied to verify indication of the splenic “wrapping” by using of retroperitoneum for splenic salvage in traumatic splenic rupture and reduce the operation time for splenic salvage. Methods: We have studied splenic wrapping for splenic salvage by using retroperitoneum instead of absorbable mesh in traumatic splenic rupture. Results: During the 4 years study period, 97 patients with splenic injuries were evaluated. According to efficacy of our new …
Published in Research and Reviews : Journal of Surgery · Vol. 10, Issue 1, 2021 · pp. 7–11 Read article
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Evaluation and Optimization of an Aqua-Ammonia Vapor-Absorption Refrigeration System
Abstract: The process parameters of ammonia-water absorption system were optimized in terms of temperatures of generator and condenser and heat ratios of generator-to-condenser and generator-to-absorber. The iteration method was used to get the variation in generator and condenser temperatures with coefficient of performance (COP) for the fixed evaporator temperature. The sizing of generator, absorber and condenser was found from the variation of heat ratios of generator-to-condenser and generator-to-absorber for the fixed …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 1, Issue 1, 2014 · pp. 9–17 Read article
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Plant Seeds as Biosorbents for the Purification of Water
Abstract: Water purification is essential to overcome drinking water problem. This study was carried out to find out suitable low cost biosorbents for the purification of physiochemical parameters of water. Moringa (Moringa oleifera), Nelli (Phyllanthus acidus), jackfruit (Artocarpus heterophyllus), java plum (Syzygium cumini) and mangrove apple (Sonneratia caseolaris) seeds were used and their efficiency was compared with activated charcoal as a reference. Water samples were collected from a selected drinking well …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 9, Issue 2, 2018 · pp. 30–39 Read article
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Numerical Analysis of Battery Thermal Management Using Phase Change Material Concerning Melting Fraction and Temperature
Abstract: This work, analysis and simulates a phase change material melting for battery thermal management (BTM). Phase change materials (PCM) are the substances that, undergo through a phase transition, such as melting from solid to liquid by absorbing or releasing a significant amount of energy as heat. PCM is advantageous for the thermal control of batteries because of this characteristic. As the battery produces heat, the PCM surrounding it absorbs the …
Published in Journal of Polymer & Composites · Vol. 11, Issue 8, 2023 · pp. 19–31 Read article
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Analysis of Sound Transmission Loss in Hybrid Mufflers for Automotive Applications
Abstract: An exhaust system's noise level can be reduced with the use of a muffler. There is general recognition that baffled exhaust mufflers reduce noise emissions and increase the loss of sound transmission. The reduction of sound transmission can be further achieved by inserting sound-absorbing materials inside the muffler. Exhaust muffler systems with strategically positioned baffles have been shown to effectively reduce noise emissions, thereby improving acoustic performance. Baffles divert and …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 314–322 Read article
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Design and Analysis of Quantum Dot Solar Cell Using SCAPS-1D Software
Abstract: Compared to conventional solar cells, quantum dot solar cells (QDSCs) have drawn a lot of attention due to their hybrid structure, low production cost, and greater power conversion efficiency. Nevertheless, carrier recombination in the quasi-neutral region (QNR) continues to limit their performance. The electron transport layer (ETL) and hole transport layer (HTL) are two of the layers that are most important in determining the overall efficiency of the device. The …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 17, Issue 1, 2026 · pp. 15–20 Read article