Digital Commons Network^™

Oxidative Cleavage Of Oleic Acid At High Temperature Under Autogenous Pressure, Nichkamon Suwannit

Chulalongkorn University Theses and Dissertations (Chula ETD)

The oxidative cleavage of oleic acid to produce azelaic acid and nonanoic acid, both of which are high-value chemicals and essential precursors in the pharmaceutical and plastic industries, was investigated. The objectives of this study were to examine the influence of temperature on reaction mechanisms, product formation, and reaction efficiency, as well as to optimize the reaction conditions for potential industrial applications. The research utilized hydrogen peroxide (H2O2) as the oxidizing agent, tungsten oxide (WO3) as the catalyst, and tert-butanol as a co-solvent under self-generated autogenous pressure conditions. The temperature range studied was 80 to 160°C, aiming to evaluate the …

Uv-Enhanced Catalytic Oxidative Cleavage Of Oleic Acid., Trinnasit Wittayakullertsin

Chulalongkorn University Theses and Dissertations (Chula ETD)

Oleic acid, a key component of plant oils such as palm oil, is a versatile feedstock for producing high-value bio-based chemicals. Utilizing its potential aligns with Thailand's objective of promoting sustainability as a premier palm oil producer. The conventional oxidative cleavage of oleic acid typically requires extreme conditions, including high temperatures, and ozone, which are expensive and harmful to the environment. This research provides an innovative method for utilizing ultraviolet (UV) radiation to increase oxidative cleavage at low temperatures (below 80°C). It employs hydrogen peroxide (H2O2) as an oxidizing agent and tungsten trioxide (WO3) as a catalyst to generate hydroxyl …

Wat Arun Metaverse: A Virtual Reality Creation Process, Avishi Usarda Waidyaratne

Chulalongkorn University Theses and Dissertations (Chula ETD)

Wat Arun, known as the 'Temple of Dawn,' is a monumental Buddhist temple and a prominent tourist attraction in Thailand, reflecting the country's rich culture and serving as a focal point for Buddhist studies. This thesis addresses the limitations of traditional cultural preservation and educational methods by presenting a transformative approach through the creation of a virtual reality (VR) based metaverse. This immersive platform enables users to explore and engage with the historical landmark of Wat Arun in unprecedented ways. Utilizing advanced three-dimensional (3D) digitization techniques, this study details the creation process of digital representation of Wat Arun's Viharn-Noi area, …

การวิเคราะห์ความอ่อนไหวของตัวแปรที่มีผลต่อแบบจำลองพฤติกรรมของไฟ, ธวัช งามศรีตระกูล

Chulalongkorn University Theses and Dissertations (Chula ETD)

ปัญหาไฟป่าในภาคเหนือของประเทศไทยนับเป็นปัญหาสิ่งแวดล้อมที่เกิดขึ้นทุกปี โดยเฉพาะอย่างยิ่งจังหวัดเชียงใหม่ที่มีพื้นที่ความเสียหายจากไฟป่าสูงกว่าจังหวัดอื่นๆ ซึ่งปัญหาดังกล่าวได้ส่งผลกระทบต่อมนุษย์ สัตว์ และทรัพยากรธรรมชาติในพื้นที่ การจัดการเชื้อเพลิงเป็นหนึ่งในวิธีการควบคุมไฟป่าที่มีประสิทธิภาพโดยเป็นการลดปริมาณเชื้อเพลิงที่สะสมภายในพื้นที่ เพื่อลดความรุนแรงของไฟป่า แบบจำลองพฤติกรรมของไฟเป็นเครื่องมือที่ใช้ในการศึกษาพฤติกรรมของไฟป่า ที่มีการนำมาใช้ในการวางแผนเพื่อกำหนดวิธีการควบคุมไฟป่าและการจัดการเชื้อเพลิง ในงานวิจัยนี้ได้นำแบบจำลองพฤติกรรมของไฟ FlamMap มาศึกษาพฤติกรรมของไฟและวิเคราะห์ความอ่อนไหวของแบบจำลอง โดยมีพื้นที่อุทยานแห่งชาติสุเทพ-ปุยเป็นพื้นที่ศึกษา และข้อมูลที่เกี่ยวข้องกับเชื้อเพลิง ภูมิศาสตร์ และอุตุนิยมวิทยาในพื้นที่ศึกษาเป็นข้อมูลนำเข้า ซึ่งได้ทำการจำลองพฤติกรรมของไฟจากชุดข้อมูลนำเข้าจำนวน 10 วันภายใต้ 5 สถานการณ์จำลอง ได้แก่ ไม่มีการจัดการเชื้อเพลิง และมีการจัดการเชื้อเพลิงในพื้นที่ (10%, 15%, 20% และ 30%) พบว่า ความยาวของไฟมีค่า 0.11 – 0.774 เมตร ค่าอัตราการลุกลามของไฟอยู่ในช่วง 0.208 - 1.828 เมตรต่อนาที ค่าความรุนแรงของไฟอยู่ในช่วง 2.07 – 139.93 กิโลวัตต์ต่อเมตร ค่าพลังงานความร้อนต่อหน่วยพื้นที่มีค่า 2.07 – 5,253.72 กิโลจูลล์ต่อตารางเมตร และเวลาที่น้อยที่สุดในการเคลื่อนที่ของไฟอยู่ในช่วง 6,420 – 102,319 นาที และการศึกษาความอ่อนไหวของตัวแปรที่มีผลต่อแบบจำลองด้วยค่าความชื้นในเชื้อเพลิงกับพารามิเตอร์ที่เกี่ยวข้องกับพฤติกรรมของไฟนั้นสามารถแบ่งพารามิเตอร์ที่เกี่ยวข้องกับพฤติกรรมของไฟได้เป็น 2 กลุ่ม คือ กลุ่มที่แปรผันตามค่าความชื้นฯ ได้แก่ ความยาวของไฟ อัตราการลุกลามของไฟ ความรุนแรงของไฟ และพลังงานความร้อนต่อหน่วยพื้นที่ เป็นต้น และกลุ่มที่แปรผกผันกับค่าความชื้นฯ คือ เวลาที่น้อยที่สุดในการเคลื่อนที่ของไฟ โดยกลุ่มที่ 1 จะมีค่าลดลงเมื่อค่าความชื้นฯมีค่าสูงขึ้น ในขณะที่กลุ่มที่ 2 จะมีค่าเพิ่มขึ้นเมื่อความชื้นฯมีค่าสูงขึ้น โดย ค่า R2 แต่ละชุดความสัมพันธ์ของข้อมูลมีค่า 0.6596 - 0.9941 (ความยาวของไฟ), 0.6282 – 0.9946 (อัตราการลุกลาม), 0.6331 – 0.9945 (ความรุนแรงของไฟ), 0.6223 – 0.9934 (พลังงานความร้อนต่อหน่วยพื้นที่) และ 0.8298 – 0.9535 (MTT) …

Risk Assessment Of Microplastics Contamination In Soil And Leachate From Different Ages Of Landfill, Panuwat Koonmee

Chulalongkorn University Theses and Dissertations (Chula ETD)

Landfills were used for the disposal of waste materials, but they could contribute to microplastic (MP) pollution. MPs waste had been released in landfills into the surrounding environment, contaminating soil and leachate collection pond. Although there were many reports that MPs could generate in leachate and soil samples from the landfill, it exists many blanks for the evolution of physical and chemical characteristics of MPs with different landfill age. In order to address the question of changing in the abundances and characteristics of MPs in different ages of landfill as potential sources of contamination and the efficacy of existing landfill …

การสร้างแอนิเมชัน 3 มิติ ของใบหน้าขณะพูดภาษาไทยสําหรับใช้ในการพัฒนาเกม, ภัทรานิษฐ์ มุสิกะประยูร

Chulalongkorn University Theses and Dissertations (Chula ETD)

โครงงานมหาบัณฑิตนี้จึงเสนอวิธีการสร้างแอนิเมชัน 3 มิติ ของใบหน้าขณะพูดภาษาไทยสำหรับใช้ในการพัฒนาเกม ในการสร้างแบบจำลองเพื่อทำนายการเคลื่อนไหวของใบหน้าขณะพูดภาษาไทย ได้ใช้ชุดข้อมูลออดิโอวิชวล TSynC-3miti: Audiovisual Speech Synthesis Database from Found Data ร่วมกับแนวคิดจาก งานวิจัย A Decision Tree Framework for Spatiotemporal Sequence Prediction ที่ได้เสนอวิธีการสำหรับการทำนายลำดับข้อมูลที่มีจำนวนมิติสูงและต่อเนื่อง โดยใช้เทคนิคการแบ่งย่อยด้วยหน้าต่างเลื่อนร่วมกับวิธีการรวมกลุ่มของต้นไม้ตัดสินใจ ซึ่งสามารถนำมาประยุกต์ใช้ในการสร้างแอนิเมชันสำหรับการพูดได้ ในการทำนายการเคลื่อนไหวของใบหน้าขณะพูดภาษาไทยในโครงงานมหาบัณฑิตนี้ จะใช้ข้อมูลนำเข้าเป็นลำดับของสัญลักษณ์โฟเนติก จากจึงต้องมีการเตรียมชุดข้อมูลใหม่จากชุดข้อมูลออิดิโอวิชวล TSynC-3miti จากนั้นนำชุดข้อมูลไปฝึกสอนโมเดล และพัฒนาเครื่องมือที่ใช้ในการสร้างแอนิเมชัน โดยเป็นรูปแบบของส่วนเสริมสำหรับใช้ในเกมเอนจิน Unreal Engine โดยรับอินพุตเป็นข้อความภาษาไทย และจะได้ค่าการเคลื่อนไหวใบหน้ามาอ้างอิงบนใบหน้าของตัวละครในแต่ละช่วงเวลา ผลลัพธ์ของการทำงานของส่วนเสริมนี้จะได้เป็นแอนิเมชัน 3 มิติของโมเดลตัวละคร MetaHuman ที่สามารถพูดภาษาไทยได้อย่างสมจริง โดยผลการทดสอบพบว่าแอนิเมชันมีความสมจริงจากมุมมองทั้งหน้าตรงและหน้าเอียง โดยมุมมองหน้าเอียงดูสมจริงมากกว่า และการออกเสียงแต่ละโฟเนติกมีความสมจริงเช่นกัน

Virtual Reality Of Labless Welding For Next Industrial Training, Suphakit Anonglekha

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research introduces an innovative Virtual Reality (VR) application designed to educate users on Welding operations. Its main goals include creating a realistic and immersive learning environment that is also safe. The development process involved the integration of multiple technologies, leveraging the Unity engine and 3D sculpting, all based on extensive research. With all of the type of weld works found in the welding laboratory represented, except the workpiece and electrode material, the VR application accuracy rating is calculated to 94%. The study's significance lies in its contribution to virtual education, especially in fields that require hands-on experience. The VR …

Mouralherwaqh Coastal Wetland Road Crossing Da'luk, Pakunihanich Nicoli Martin

Cal Poly Humboldt theses and projects

The integration of Indigenous and Western science plays an essential role in Tribally led collaborations for land management. This process of woven sciences is rooted in reciprocal relations and partnerships guided by Tribal Nations. Our cohort was invited by Wiyot Tribal Representatives to investigate a culvert located within the wetlands of Mouralherwaqh— a parcel of land reacquired by the Wiyot Tribe in 2022. This document seeks to share our experience and analysis as part of the Wiyot Tribe’s broader journey in navigating ecocultural restoration projects within Mouralherwaqh. The four community interests we investigated for the wetland crossing included a resized …

Physicochemical Characterization Of Edible Insect Oils: Insights Into Fatty Acid Composition, Thermal Behavior And Quality Parameters, Eng-Tong Phuah, Yee-Ying Lee, Teck-Kim Tang, Guanghui Li, Shyang-Pei Hong, Syazana Abdullah Lim

ASEAN Journal on Science and Technology for Development

Edible insects are emerging as a sustainable food source due to their high nutritional value. This study employed the three-phase partitioning (TPP) method to extract oils from sago worm (Rhynchophorus ferrugineus), superworm (Zophobas morio), and cricket (Acheta domesticus). The study evaluated and compared the physicochemical properties of these insect oils, including iodine value (IV), peroxide value (PV), p-anisidine value (p-AV), acid value (AV), refractive index (RI), thermal behavior, and fatty acid compositions. Results revealed that the sago worm exhibited the highest oil yield (47.8 ± 2.2%) compared to the superworm (23.8 ± 1.4%) and cricket (6.4 ± 0.6%). Cricket oil …

Assessing The Organic Acids-Solubilized Collagen Derived From The Skin Of Unicornfish (Naso Reticulatus Randall, 2011) On Physicochemical And Structural Characteristics: Toward Alternative Source For Industrial Applications, Dayang Fazrianie Harianto, Abdul Aziz Jaziri, Rossita Shapawi, Ruzaidi Azli Mohd Mokhtar, Wan Norhana Md. Noordin, Masmunira Rambli, Nurul Huda

ASEAN Journal on Science and Technology for Development

Converting skin by-product of unicornfish (Naso reticulatus Randall, 2011) into a valuable commodity like collagen is a good strategy to explore alternative sources for land-based animals. Additionally, marine fish collagens are preferable due to their safer and great properties. This project aimed to compare extractability of collagens prepared with three organic acids (i.e., acetic, lactic and citric acids), and their characteristics were also discussed. Collagen extracted with citric acid (CSCUS) (7.10%) had a significantly higher yield (p

Assessment Of Novel Plant-Based Fat Efficiency In Comminuted Chicken Meat System, Salma Mohamad Yusop, Shu Jo Lin, Nurkhuzaiah Kamaruzaman, Nurlisa Mohd Azhari

ASEAN Journal on Science and Technology for Development

The composition of fats and oils significantly impacts the flavour, nutrition, and appearance of food. Excessive consumption of saturated fatty acids, primarily found in animal fats, raises the risk of coronary heart disease. To address this, plant-based fats are used as substitutes, with microalgae offering unique nutritional benefits as a fat source. This study evaluates the performance of structured plant-based fats, incorporating microalgae (Aurantiochytrium sp. SW1), as a fat substitute in chicken patties. Four formulations were tested: 0% (control), 5%, 7%, and 10% structured microalgae-based fat. Colour, texture, water-holding capacity, cooking loss, and microstructure in both raw and cooked samples …

Development Of Halalan Tayyiban Plant-Based Cheese Formulations, Hasna B. Mazalana, Mas M. Rambli, Syazana A. Lim, Beston F. Nore

ASEAN Journal on Science and Technology for Development

The worldwide cheese production is dominated by animal milk sources with various industrial procedures, including animal rennet. There is a need to diversify the animal-based dairy products into plant-based one, not only to nurture the halalan tayyiban concept for Muslims, but also to accommodate the dietary restriction of some consumers. The objective of this work is to formulate a cheese type derived from plant-based milk with permissible ingredients to create a product for Muslim and non-Muslim consumers. In this study, we explored the use of conventional and non-conventional cheese-making procedures. A total of four experimental formulations (EF1-4) combinations were conducted …

Innovative Approaches And Challenges In Brunei's Agricultural Management, Nuramalina Manshor, Ulaganathan Subramanian

ASEAN Journal on Science and Technology for Development

The management and development in agriculture attract agricultural economic science for the pricing, business, farm policy, and financial knowledge. It conjointly draws on plant and animal sciences for soil, seed and fertilizer information, weed control, insect management, and rationing and breeding; agricultural engineering knowledge for farmhouses, vehicles, irrigation, field drying, drainage, and management of erosions; and data on human behavior in Science and Social Science.

The Effects Of The Crystallinity Index Of Cellulose On The Flexural Properties Of Hybrid-Cellulose Epoxy Composites, Nathawat Poopakdee, Warut Thammawichai

Journal of Metals, Materials and Minerals

This work investigated the effects of the crystallinity index (CI) of cellulose on the flexural properties of hybrid-cellulose epoxy composites. The CI was varied by combining cellulose microfibrils (CMF) and microcrystalline cellulose (MCC), extracted from coir and eucalyptus, respectively, in various mixing ratios. From the XRD analysis, it was shown that the CI values and the CMF/MCC content follow a parabolic-fitting pattern, reaching a maximum value of 82.06% for the CMF/MCC of 30/70. The composites with cellulose of different CI values were fabricated and the flexural properties were measured. The results showed that the flexural strength increased as the CI …

Optimization Of Ultrasound-Assisted Anthocyanin Extraction From Agricultural Waste Purple Corn Silk For Multifunctional Hemp Finishes, Benjamas Klaykruayat, Nattaya Vuthiganond, Pisutsaran Chitichotpanya

Journal of Metals, Materials and Minerals

The utilization of agricultural wastes for textile dyeing has gained popularity due to their safe and environmentally friendly properties, as well as the resource sustainability. Natural dye extraction is usually achieved through solvent extraction, which is time-consuming, requires a lot of solvent, and degrades desired compounds at high temperatures. Thus, this study investigated ultrasound-assisted anthocyanin extraction from agricultural waste purple corn silk as natural functional colorants for hemp finishes, given the numerous health benefits associated with anthocyanin. In order to optimize the extraction processes and evaluate the synergistic impact of these conditions, response surface methodology was implemented. The optimum conditions …

Single Electrode Mode Triboelectric Nanogenerator For Recognition Of Animal Sounds, Archana Panda, Kunal Kumar Das, Kushal Ruthvik Kaja, Mohamed Belal, Basanta Kumar Panigrahi

Journal of Metals, Materials and Minerals

This research presents an innovative and sustainable solution by designing triboelectric nanogenerators (TENGs) for energy harvesting. The fabrication process of TENGs includes PDMS and aluminum. The two single electrode mode TENG was designed one is plain PDMS/Al and the other is porous PDMS/Al TENG devices. The porous PDMS/Al TENG device generated a voltage and current of 7 V and 5 nA for 2 cm ´ 2 cm device area. Moreover, the TENG system was employed to successfully charge capacitors, and recognize various animal sounds. This study underscores the promising potential of harvesting energy from body movements and powering of devices, …

In Vitro And Vivo Biocompatibility And Degradability Of Low-Alloyed Mg-Zn-Ca-Mgo Composite As Bone Repair Biomaterials, Shuquan Zhang, Jiangtao Feng, Chaokun Tang, Ran Pang, Xinglong Zhang, Chenguang Li, Weihao Zhang, Fengxin Zhou, Feng Xue, Shaoyuan Lyu, Minfang Chen, Hao Wang

Journal of Metals, Materials and Minerals

Magnesium alloys have gained attention as biodegradable bone repair biomaterials. Unlike non-biodegradable materials like titanium and tantalum, biodegradable implants offer advantages in promoting bone healing and minimizing chronic inflammatory reactions. However, the impact of the implant's degradation on the osteogenic environment remains a concern. The Mg-Zn-Ca-MgO composite, being biocompatible and containing osteogenic ions, is a promising candidate. This study assesses the degradability and in vitro/in vivo biocompatibility of two Mg-Zn-Ca-MgO composites with varying degradation rates. The Mg-1Zn-0.2Ca-1.0MgO composite was prepared, and leaching solutions were created following standard protocols. MC3T3-E1 cell cultures were conducted to assess cell toxicity, alkaline phosphatase (ALP) …

Stormwater Responses To Climatic And Land Cover Changes In Lowly Urbanized Subcoastal Environments, Md Tanvirul Islam

Graduate Theses, Dissertations, and Problem Reports (ETD)

Stormwater runoff is widely considered a significant factor in coastal inundation and water quality degradation. The main objective of this thesis is to determine the potential impacts on stormwater runoff in lowly urbanized coastal/subcoastal environments under a changing climate and land use/cover. The East Fork San Jacinto River Basin (Area = 2577 of southern Texas, USA was considered a pilot area for this study. Given the sparse availability of high-resolution precipitation data in space and time, this research first evaluated four remotely sensed and/or reconstructed precipitation products (CMORPH-CDR, MERRA, PERSIANN-CDR, and PRISM) by comparing the data with the historical gauge …

Engineering Mussel Foot Protein 5 (Mfp5) For Enhanced Adhesive Performance In Tendon And Bone Repair, Ziyue Zhu

McKelvey School of Engineering Graduate Student Theses & Dissertations

This study explores the development of Mussel Foot Protein 5 (MFP5) bioadhesives to improve tendon-to-tendon and tendon-to-bone adhesive outcomes. MFP5, known for its underwater adhesive properties, was synthesized using recombinant techniques and optimized through coacervation and cross-linking. Adhesion tests demonstrated the superior performance of the optimized MFP5 adhesive on the tendon and bone samples. Improved protein concentration testing and purification methods enhanced MFP5 yield and consistency. Future research will focus on further standardization, exploring alternative purification methods, and evaluating the adhesive's performance in animal models. This study lays a foundation for developing robust MFP5-based bioadhesives, potentially revolutionizing surgical repair techniques …

Ifn-𝜸 And Il-10 Immunosensor With Vertically Aligned Carbon Nanotube Interdigitated Electrodes Toward Pen-Side Cattle Paratuberculosis Monitoring, Shaowei Ding, Benjamin J. Brownlee, Kshama Parate, Cicero C. Pola, Bolin Chen, Jesse M. Hostetter, Douglas Jones, John Jackman, Brian D. Iverson, Jonathan C. Claussen

Faculty Publications

Highly sensitive vertically aligned carbon nanotube arrays (VANTAs) interdigitated electrode (IDE) arrays are developed for electrochemical biosensing of two cytokines (i.e., interleukin-10 (IL-10) and interferon-gamma (IFN-𝜸)) that are useful for early detection Johne’s disease (Bovine Paratuberculosis) in cattle. The high aspect ratio VANTA-IDEs (50–60 μm in height) are grown through a chemical vapor deposition process from an iron (Fe) catalyst that is lithographically patterned on a silicon wafer with equal finger width and inter-finger spacing of 25 μm. After functionalization with distinct antibodies the VANTA-IDEs are capable of selective detection of both IL-10 and IFN-𝜸 within an actual biological matrix …

Pharmacology Of Boldine: Summary Of The Field And Update On Recent Advances, Juan C. Sáez, Justin C. Burrell, Catherine M. Cahill, D. Kacy Cullen, Lakshmi A. Devi, Ryan J. Gilbert, Zachary A. Graham, Vadim J. Gurvich, Leif A. Havton, Ravi Iyengar, Rajesh Khanna, Edmund F. Palermo, Mustafa Siddiq, Carlos A. Toro, Walter Vasquez, Wei Zhao, Christopher P. Cardozo

Chemical and Biochemical Engineering Faculty Research & Creative Works

Over the past decade, boldine, a naturally occurring alkaloid found in several plant species including the Chilean Boldo tree, has garnered attention for its efficacy in rodent models of human disease. Some of the properties that have been attributed to boldine include antioxidant activities, neuroprotective and analgesic actions, hepatoprotective effects, anti-inflammatory actions, cardioprotective effects and anticancer potential. Compelling data now indicates that boldine blocks connexin (Cx) hemichannels (HCs) and that many if not all of its effects in rodent models of injury and disease are due to CxHC blockade. Here we provide an overview of boldine's pharmacological properties, including its …

Design Of An Adaptive Robust Pi Controller For Dc/Dc Boost Converter Using Reinforcement-Learning Technique And Snake Optimization Algorithm, Seyyedmorteza Ghamari, Mojtaba Hajihosseini, Daryoush Habibi, Asma Aziz

Research outputs 2022 to 2026

The DC/DC Boost converter exhibits a non-minimum phase system with a right half-plane zero structure, posing significant challenges for the design of effective control approaches. This article presents the design of a robust Proportional-Integral (PI) controller for this converter with an online adaptive mechanism based on the Reinforcement-Learning (RL) strategy. Classical PI controllers are simple and easy to build, but they need to be more robust against a wide range of disturbances and more adaptable to operational parameters. To address these issues, the RL adaptive strategy is used to optimize the performance of the PI controller. Some of the main …

Educating For Shalom In Engineering, Julie Wildschut

University Faculty Publications and Creative Works

Created in the image of God, humans have a unique purpose within creation. We are given the task of worshipping God (Isa 43:21), sharing the gospel of Jesus Christ (Mat 28:18-20), discovering and developing the potentials of creation (Gen 2:15), struggling and praying for shalom (Isa 1:17), and celebrating instances of God’s coming kingdom (Isa 9:1-7, Col 1:19-20). As Christian engineering educators, we have the additional task of preparing students to become capable engineers and to use those skills in response to God’s call in their lives. We have the blessing of not only teaching the technical aspects of engineering, …

Development Of A New Green Infrastructure By Using Biochar Amended Topsoil For On-Site Stormwater Runoff Treatment, Ayesha Sadia

College of Graduate Studies: Theses & Dissertations

This Research Project aimed to design, build, operate and maintain, and monitor a new green infrastructure (GI) using biochar-amended topsoil for on-site stormwater runoff treatment in urban areas. The project involved evaluating the removal efficiencies of pollutants from stormwater runoff such as total suspended solid (TSS), nutrients including nitrogen and phosphorous, heavy metals including lead (Pb), zinc (Zn) and copper (Cu) and oil and grease etc. from the media of biochar amended topsoil. In this Project, a full-scale Field Test Site with a total area of 500 and 1 ft depth was built to on-site treat stormwater runoff from a …

In Vivo Measurement Of Nadh Fluorescence Lifetime In Skeletal Muscle Via Fiber-Coupled Time-Correlated Single Photon Counting, Kathryn M. Priest, Jacob V. Schluns, Nathania Nischal, Colton L. Gattis, Jeffery C. Wolchok, Timothy J. Muldoon

Biomedical Engineering Faculty Publications and Presentations

Nicotinamide adenine dinucleotide (NADH) is a cofactor that serves to shuttle electrons during metabolic processes such as glycolysis, the tricarboxylic acid cycle, and oxidative phosphorylation (OXPHOS). NADH is autofluorescent, and its fluorescence lifetime can be used to infer metabolic dynamics in living cells. Fiber-coupled time-correlated single photon counting (TCSPC) equipped with an implantable needle probe can be used to measure NADH lifetime in vivo, enabling investigation of changing metabolic demand during muscle contraction or tissue regeneration. This study illustrates a proof of concept for point-based, minimally-invasive NADH fluorescence lifetime measurement in vivo. Volumetric muscle loss (VML) injuries were …

Ifn-𝜸 And Il-10 Immunosensor With Vertically Aligned Carbon Nanotube Interdigitated Electrodes Toward Pen-Side Cattle Paratuberculosis Monitoring, Shaowei Ding, Benjamin J. Brownlee, Kshama Parate, Cicero C. Pola, Bolin Chen, Jesse M. Hostetter, Douglas Jones, John Jackman, Brian D. Iverson, Jonathan C. Claussen

Faculty Publications

Highly sensitive vertically aligned carbon nanotube arrays (VANTAs) interdigitated electrode (IDE) arrays are developed for electrochemical biosensing of two cytokines (i.e., interleukin-10 (IL-10) and interferon-gamma (IFN-𝜸)) that are useful for early detection Johne’s disease (Bovine Paratuberculosis) in cattle. The high aspect ratio VANTA-IDEs (50–60 μm in height) are grown through a chemical vapor deposition process from an iron (Fe) catalyst that is lithographically patterned on a silicon wafer with equal finger width and inter-finger spacing of 25 μm. After functionalization with distinct antibodies the VANTA-IDEs are capable of selective detection of both IL-10 and IFN-𝜸 within an actual biological matrix …

Investigation Of Synergistic Effect Between Polystyrene And Polyethylene Under Conventional Thermal Heating And Microwave Heating, Thang Luong

Graduate Theses, Dissertations, and Problem Reports (ETD)

Single-use plastics (Low Density Polyethylene, LDPE; Polystyrene, PS; Polypropylene, PP) are increasingly used in the modern world, with their usage growing every year. An effective method to manage the resulting waste is urgently needed, as landfilling and incineration have proven harmful to the environment in the long term. Mechanical recycling may not maintain the desirable characteristics of the single-use plastics through several cycles. Pyrolysis emerges as a promising approach to address plastic waste. Given that single-use plastic waste often comes in a mixture, combining plastic in the feedstock is a viable solution to effectively convert these polymers altogether to gain …

Performance Evaluation Of Composite Utility Structures Under Wildfires And Mitigation Methods, Siddhant Sitoula

Graduate Theses, Dissertations, and Problem Reports (ETD)

The Fiber Reinforced Polymer (FRP) composite utility poles and crossarms have been getting wider attention from the utility industries because of their advantages over the traditional wooden, concrete, and steel poles. Wood is vulnerable to fire, rot, and animal damage. Concrete poles are heavier, increasing both transportation and installation costs of the poles, in addition to limited-service life (40-50 years). Similarly, steel poles have durability and safety concerns because of their inherent corrosive nature and conductivity. These disadvantages are significantly reduced by the use of FRP composites in utility structures because of FRP’s strength, specific gravity, flexibility, non-conductivity and durability …

Characterization And Evaluation Of Various Biochar Types As Green Adsorbents For Rare Earth Element Recovery From Aqueous Solutions, Oluwaseun Victor Famobuwa

Graduate Theses, Dissertations, and Problem Reports (ETD)

Rare earth elements (REEs) are members of the lanthanide family (atomic number 57 – 71). They are significantly important to the global economy due to their applications in renewable energy, defense, and medical industries. REEs are primarily derived from bastnaesite and monazite but may also be present in xenotime, cerite, alanite, and many other types of mineralization in lesser amounts. Due to the increasing demand for REEs and their criticality in the supply chain, the need to explore secondary sources of REEs has gained tremendous importance.

Secondary sources of REEs include but are not limited to acid mine drainage (AMD), …

4d Epr Oximetry Imaging For 4d Bioprinting And Tissue Engineering, Sajad Sarvari

Graduate Theses, Dissertations, and Problem Reports (ETD)

Bioprinting, akin to 3D printing, employs cell-laden hydrogels such as GelMA (Gelatine Methacrylate) and Alginate instead of plastic or resin to create biological structures. The printing process followed by subsequent tissue maturation is known as 4D bioprinting, where the fourth dimension is time. Ensuring adequate and consistent oxygen, O2, supply within 3D bioprint volume over the entire maturation period process is crucial, as even transient hypoxia can impact cellular behavior and phenotypes. However, printing of fully developed vasculature remains an unresolved technical challenge. Several approaches to chemically (peroxides) or biologically (photosynthesis) generate oxygen during bioprint maturation have been proposed. However, …