http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/177 2026-05-04T19:08:24Z http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/1057 DEVELOPMENT AND ASSESSMENT OF CARBOXYMETHYL CELLULOSE LOADED ZINC OXIDE NANOPARTICLES FOR ANTIBACTERIAL PROPERTIES MAHMUD, NIAZ Zinc Oxide (ZnO) Nanoparticles (NPs) have some indigenous properties, which make them a good candidate for versatile biomedical and clinical applications. Although there are numerous potentials, clinical applications of ZnO NPs are still under many obstacles. Due to its stable nature, bigger-sized ZnO has already been used in various clinical applications (i.e., sunscreen, toothpaste, dermatological ointment, anti-etching ointment, etc.). The main problem of using nanosized ZnO in clinical applications is its lack of cell specificity and the tendency to produce reactive oxygen species by external influence (i.e., light, sound, etc.), stability in a biological system. Surface modification of the ZnO NPs can make them more stable, delay or control the release of reactive oxygen species generations, and be cell-specific in biological systems. To make the ZnO NPs enriched with cellulosic properties for antibacterial studies, the surface modification of ZnO NPs has been carried out by Carboxymethyl-Cellulose (CMC), and relevant physical properties (Fourier Transform Infrared Analysis, X-ray Diffraction, Scanning Electron Microscopy, Energy Dispersive X-Ray and Zeta Potentials) have been assessed which confirms the formation of a conjugated matrix of ZnO NPs-CMC. The antibacterial efficacy of the CMC-enriched ZnO NPs was further experimented with over Lactobacilli (Acidophilus and Bulgaricus) bacterial species to examine the antibacterial activity against the naïve molecules and found that with a slight modification of ZnO treated by CMC causes an overall increase in antibacterial efficacy at a concentration (mass/liquid-volume) of 0.5% (w/v) (viability reduction: 51% vs 66 %) & 1.5% w/v (viability reduction: 63 % vs 77 %) and insignificant at deficient concentrations (0.1% w/v) for both. DEVELOPMENT AND ASSESSMENT OF CARBOXYMETHYL CELLULOSE LOADED ZINC OXIDE NANOPARTICLES FOR ANTIBACTERIAL PROPERTIES 2024-10-01T00:00:00Z http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/941 DEEP LEARNING BASED NECK-MOUNTED MOUTH CAPTURING DEVICE TO CLASSIFY BANGLA SILENT SPEECH SUMON, MD SHAHEENUR ISLAM; ALI, MUTTAKEE BIN DEEP LEARNING BASED NECK-MOUNTED MOUTH CAPTURING DEVICE TO CLASSIFY BANGLA SILENT SPEECH 2023-02-01T00:00:00Z http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/940 DESIGN AND DEVELOPMENT OF 3D SCAFFOLDS USING ADDITIVE MANUFACTURING TECHNOLOGY RAHATUZZAMAN, MD.; TASNIM, ADIBA The development of 3D scaffolds using additive manufacturing technology has revolutionized tissue engineering due to high accuracy and reproducibility. Traditional scaffold fabrication techniques have geometric and structural limitations, as well as limited mechanical strength, and additive manufacturing technology works to overcome these limitations. The main objective of this study is to design and develop 3D scaffolds using additive manufacturing technology. In this research 3D scaffolds were designed and printed with optimized parameters using additive manufacturing, and its biocompatibility and properties were evaluated. According to this study, the 3D scaffolds produced with additive manufacturing exhibited high geometric configuration, structural uniformity, and mechanical strength. The study demonstrated the promising approach for tissue engineering applications in terms of developing 3D scaffolds. Design and Development of 3D Scaffolds Using Additive Manufacturing Technology 2023-02-01T00:00:00Z http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/939 DEVELOPMENT OF PHEROMONE BASED SMART MOSQUITO TRAP Shefa, Archi Alam; Sefat, Sayed This thesis aimed to develop a pheromone based smart mosquito trap for reducing the regional and temporal occurrences of mosquito-transmitted pathogens. The study was mainly concerned with killing mosquitoes in a very large outdoor area without negatively impacting the physical health of living beings. The device was constructed from a 5 mm thick acrylic sheet and includes several mosquito-attracting elements, including a heating pad, UV light, CO2 cylinder, and pheromone. An exhaust fan and one particular sticky substance were used to catch the mosquitoes. The CO2 dispersion and the fan's start and end times could be controlled. Other components were running the whole time. The device used four different pheromone formulations. The formulations were made by combining different ingredients such as Cyclopentanone, Palmitic Acid, Oleic Acid, Linoleic Acid, Citric Acid, and Mushroom Extracts (Shiitake Mushroom & Reishi Mushroom). The four pheromone formulations underwent Fourier Transform Infrared Spectroscopy (FTIR), Refractive Index & Brix Test, and UV Spectrum Test, and the results were really good. The trial period of the device consisted of a total of 8 days, and each day, a different kind of pheromone formulation was used with and without CO2. The test was successful, demonstrating that the device is able to capture and kill lots of mosquitoes in a vast outdoor space without dispersing any dangerous chemicals into the atmosphere. DEVELOPMENT OF PHEROMONE BASED SMART MOSQUITO TRAP 2023-02-01T00:00:00Z