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648 articles for “pre-experimental study”
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Analysis of Surface Finish of Different Metallic Materials
Abstract: This study investigates surface processing techniques aimed at achieving a surface roughness (Ra) value of < 2.5 for various materials including gray iron, steel, pure copper, aluminum, and brass. Surface roughness plays a crucial role in determining the functional and aesthetic properties of machined components. The attainment of a specific Ra value demands precise control over machining parameters and selection of appropriate finishing processes. For steel, machining operation grinding followed …
Published in International Journal of Mechanics and Design · Vol. 10, Issue 1, 2024 · pp. 1–12 Read article
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Reactive Separation for Biodiesel Purification Using Hybrid Membrane Systems
Abstract: Biodiesel produced through transesterification typically contains several impurities, including residual glycerol, unreacted methanol, soaps, water and homogeneous catalysts, all of which reduce fuel quality and hinder compliance with EN 14214 and ASTM D6751 standards. Conventional purification techniques such as water washing, centrifugation and vacuum distillation are energy-intensive, generate large volumes of wastewater and often fail to efficiently remove polar contaminants. To overcome these limitations, this study examines a reactive separation …
Published in International Journal of Chemical Separation Technology · Vol. 11, Issue 2, 2025 · pp. 17–30 Read article
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Quantum Dots in Oral Diagnostics and Theranostics: Promise and Preclinical Status
Abstract: Quantum dots in oral diagnostics and theranostics represent a rapidly evolving, largely preclinical strategy that couples highly sensitive optical imaging with targeted therapeutic delivery in the oral cavity. Their size-dependent emission, high photostability, and broad excitation spectra allow bright, multiplexed visualization of key molecular events in oral potentially malignant disorders and oral squamous cell carcinoma, while surface functionalization with antibodies, peptides, or smallmolecule ligands enables selective binding to dysplastic and …
Published in International Journal of Applied Nanotechnology · Vol. 12, Issue 1, 2026 · pp. 18–25 Read article
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Mathematical Modeling of Mass Transfer of Heavy Metals from the Diffusion of Condemned Oil in Soil Environment
Abstract: The diffusion and reaction kinetics of heavy metals in soil are critical factors influencing pollutant migration and environmental remediation strategies. Understanding the diffusion and reaction kinetics of heavy metals in soils is crucial for assessing environmental contamination and designing effective remediation strategies. This study investigated the diffusion behavior of heavy metals in soil media under varying thermal and physical conditions, employing a first- order reaction model based on Fick’s second …
Published in International Journal of Analytical and Applied Chemistry · Vol. 11, Issue 2, 2025 Read article
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Investigation of Mass Transfer Coefficient and Gas Hold Up and Bubble Size Distribution in Novel Design of Stirred Tank Reactor
Abstract: Stirred tanks are commonly used in chemical industries for reaction and separation. Large-scale reactors include many impellers to improve mixing performance. Agitator plays an important role during the gas-liquid contact in two phase flow. And it is very necessary to know for the understanding of any gas-liquid system. So, in this study my motto is to study which parameters affects in the mixing of gas inside the liquid. The parameters …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 8, Issue 2, 2022 · pp. 5–12 Read article
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Magnetohydrodynamic Instabilities in Liquid Metal Batteries: A Study of Metal Pad Roll Dynamics and Stability Thresholds
Abstract: This paper presents a comprehensive study on the metal pad roll instability (MPRI) in liquid metal batteries (LMBs), a key phenomenon driven by magnetohydrodynamic (MHD) forces. LMBs, which are poised to revolutionize grid-scale energy storage due to their low cost, long lifespan, and high current density, face critical challenges due to instabilities that can compromise operational stability. This work characterizes the MPRI in cylindrical reduction cells and offers theoretical formulations, …
Published in International Journal of Energetic Materials · Vol. 10, Issue 2, 2024 · pp. 7–11 Read article
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Design and Optimization of Heterogeneous Catalysts for Green Chemistry Processes
Abstract: The design and optimization of heterogeneous catalysts are critical for advancing green chemistry processes, aiming to minimize environmental impact while maximizing efficiency. This study explores innovative strategies for the development of heterogeneous catalysts that facilitate environmentally benign reactions. By integrating principles of catalyst design, surface science, and reaction engineering, we aim to enhance catalytic performance, selectivity, and stability. Catalyst composition and structure, investigating novel materials, including metal-organic frameworks (MOFs), zeolites, …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 10, Issue 1, 2025 · pp. 42–48 Read article
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Evaluation of the Flow Properties of Self-Compacting Fly-ash Concrete Using Artificial Neural Network
Abstract: The purpose of this study is to examine the feasibility of using artificial neural network programming for the calculation of the fresh properties of self-compacting concrete. The input parameters of the neural network were the mix composition influencing the fresh properties of self-compacting concrete namely; the cement content, the dosages of fly-ash, water, fine aggregate, coarse aggregate, and superplasticizer. The model is founded on a multilayer feed forward neural network. …
Published in International Journal of Structural Engineering and Analysis · Vol. 7, Issue 2, 2021 · pp. 35–40 Read article
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Speech Emotion Recognition using Multi- Kernel CNN for Features extraction and Random Forest Classifier
Abstract: Identifying human emotional states from speech signals is the main goal of Speech Emotion Recognition (SER), which has grown to be a significant area of study in affective computing. However, class imbalance and efficient feature extraction from speech data pose problems for many of the current methods. This study suggests a hybrid framework that combines a Random Forest (RF) classifier with a multi-kernel Convolutional Neural Network (CNN) to address these …
Published in International Journal of Digital Communication and Analog Signals · Vol. 12, Issue 2, 2026 Read article
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Mechanistic Insights into Solvent-Controlled Stepwise and Concerted Cycloadditions of the Propadienyl Cation with Oxoamides: A DFT Study
Abstract: AbstractOxazoles constitute an important class of heterocycles with widespread applications in medicinal chemistry and materials science, yet the mechanistic features governing their formation via cationic cycloaddition reactions remain incompletely understood. In this work, we present a comprehensive density functional theory (DFT) investigation into the reaction between the propadienyl cation and oxoamides as a model system for oxazole ring formation. Using the CAM-B3LYP/6–31+G(d,p) level of theory, we systematically compare gas-phase reactivity …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 12, Issue 1, 2026 · pp. 8–17 Read article
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Effectiveness of Structured Teaching Program on Knowledge Regarding Effect of Junk Food on Mucosal Layer of GI Tract Among Nursing Students in Selected Nursing Colleges at Bengaluru
Abstract: Background: Junk food is high in calories, sodium, and fat. Numerous health issues might be attributed to eating junk food in excess. Teenagers who consume junk food may be unable to eat a balanced meal at home or at school. Teenagers all throughout the world now frequently eat meals like Maggi noodles, burgers, pao-bhaji, sandwiches, hot dogs, patties, pastries, pop-corn, potato chips, carbonated beverages, biscuits, muffins, toast, kulcha-channa, samosa, and …
Published in International Journal of Medical Surgical Nursing · Vol. 5, Issue 2, 2022 · pp. 27–38 Read article
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Tensile Strength of Welded Buttly Joints by Different Types of Welding
Abstract: In this study, an experimental method for the selection of optimal welding for joining metals there areseveral methods which they are used for joining metals, that it includes using welding brazing, MetalInert Gas (MIG) Welding and Gas Metal Arc Welding is an arc welding process, in which the weld isshielded by an external gas (Argon, helium, CO2, argon + Oxygen) or other gas mixtures is one of thewidely used techniques …
Published in International Journal of Mechanics and Design · Vol. 7, Issue 2, 2021 · pp. 30–34 Read article
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A Study to Assess the Effectiveness of Counselling on Level of Awareness Regarding the Ill Effects of Substance Abuse Among Substance Abusers at Selected Setting
Abstract: Background: Substance abuse means the harmful abuse of substance such as alcohol and illicit drugs. Unlimited use of these substances produces the dependence with behavioural, higher mental functioning, physiological changes when abused continuously and repeated strong desire, to ingest substance despite of its harmful consequences. Restoration of the health of the substance abusers mainly dependent on the policies related to alcohol and intervention planned to reduce the pattern of substance …
Published in International Journal of Neurological Nursing · Vol. 3, Issue 2, 2017 · pp. 28–36 Read article
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Quantum Dots in Oral Diagnostics and Theranostics:Promise and Preclinical Status
Abstract: Quantum dots in oral diagnostics and theranostics represent a rapidly evolving, largely preclinical strategy that couples highly sensitive optical imaging with targeted therapeutic delivery in the oral cavity. Their size-dependent emission, high photostability, and broad excitation spectra allow bright, multiplexed visualization of key molecular events in oral potentially malignant disorders and oral squamous cell carcinoma, while surface functionalization with antibodies, peptides, or small-molecule ligands enables selective binding to dysplastic and …
Published in International Journal of Applied Nanotechnology · Vol. 12, Issue 1, 2026 · pp. 20–30 Read article
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Enhancing Geopolymer Concrete Properties Through Processed Fly Ash and Alccofine Integration
Abstract: Abstract Geopolymer concrete (GPC) is gaining attention as a sustainable alternative to ordinary Portland cement (OPC) due to its potential to reduce the environmental impact of cement production, which accounts for roughly 7% of global CO2 emissions. This study investigates the use of processed fly ash and alccofine as key ingredients in GPC to improve its workability and compressive strength. Experimental tests were conducted to evaluate the effects of different …
Published in International Journal of Construction Engineering and Planning · Vol. 10, Issue 2, 2024 · pp. 1–8 Read article
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Comparative Biosorption Analysis of Chicken Feathers and Absorbent Pads on Crude Oil Contaminated Soil
Abstract: The study was done for the biosorption of hydrocarbon contaminated soil using chicken feather waste (CFW) and adsorbent pad adsorbents (AP). The adsorbents materials were sourced locally and prepared accordingly and made ready for the adsorption process. To analyze the adsorption of crude oil from contaminated soil, the following time intervals were used: 0 weeks, 4 weeks, 8 weeks, 12 weeks, 15 weeks, and 20 weeks. Additionally, varying amounts of …
Published in International Journal of Industrial Biotechnology and Biomaterials · Vol. 10, Issue 2, 2024 · pp. 13–33 Read article
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Case Studies On Synthesis Of PLLA Bioplastic Starting From Food And Agricultural Wastes
Abstract: Polylaevo Lactic Acid (PLLA) is an excellent biopolymer that is biodegradable and has characteristics exactly similar to polystyrene. However, at present, the market price of this biopolymer is significantly higher than polystyrene and other synthetic plastics. The major hindrances to the large scale manufacture of this polymer are the lack of availability of a cheap raw material and the overall economy of synthesis of lactic acid from the same. In …
Published in International Journal of Chemical Engineering and Processing · Vol. 1, Issue 1, 2015 · pp. 1–13 Read article
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To develop and evaluate effectiveness of Standard operating procedure on control and prevention of nosocomial infection in NICU at SDM Hospital Sattur, Dharwad.
Abstract: BACKGROUND OF THE STUDY: NICU is one of the most important but infection prone area of the hospital. It is not the treatment but the prevention which is the goal of infection control for the newborn. This goal is affected through good prenatal screening, immunization and early therapy of the mother prior to or during her pregnancy. Measures for reducing neonatal infection deserve high priority in every neonatal unit. Most …
Published in International Journal of Pediatric Nursing · Vol. 4, Issue 1, 2018 · pp. 9–12 Read article
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Review of Silicon Reactivity of Self-assembled monolayer and its Properties
Abstract: In most cases, the assumption of perfect high viscosity between silicon and silver underlies the modelization of silicene on Ag(111). According to recent reports, growth does not take place on top of the Ag(111) terraces, but rather within the first layer of them. In this article, we present the results of a study that combines scanning tunnelling microscopy and density functional theory to simulate the nucleation process and reveal the …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 8, Issue 1, 2022 · pp. 29–33 Read article
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A Study on Machine-Learning-Driven Insight into theThermal Behavior of Polymers and Composite Materials
Abstract: The thermal performance of polymeric and composite systems underpins their suitability for aerospace, electronics, and energy‑storage applications, yet reliable prediction of temperature‑dependent properties remains a formidable challenge. In this work we present a data‑driven framework that harnesses modern machine‑learning (ML) techniques to forecast key thermal metrics – glass‑transition temperature (Tg), melting point (Tm), thermal conductivity (k), and decomposition onset (Td) – from a chemically informed descriptor space. A curated database …
Published in International Journal of Polymer Science and Engineering · Vol. 12, Issue 1, 2026 · pp. 1–11 Read article