In Vitro Assessment Of The Anti-Biofilm Effectiveness Of Copper And Zinc Enhanced Borate Bioactive Glass Using Processed Microscopic Images,
2024
Missouri University of Science and Technology
In Vitro Assessment Of The Anti-Biofilm Effectiveness Of Copper And Zinc Enhanced Borate Bioactive Glass Using Processed Microscopic Images, Sarah Fakher, David J. Westenberg
Biological Sciences Faculty Research & Creative Works
The escalating burden of nosocomial infections presents a formidable challenge to healthcare systems worldwide, leading to increased morbidity, prolonged hospital stays, and elevated healthcare costs. These infections are often resistant to conventional antibiotic therapies due to their association with biofilms which contribute to the persistence and resistance of pathogens. In addressing the challenge of biofilm-associated nosocomial infections, borate bioactive glasses (BBGs) have emerged as promising biomaterials. Doping these glasses with antimicrobial metals could potentially harness their antibacterial properties to prevent biofilm formation. This study undertakes a rigorous evaluation of the anti-biofilm efficacy of copper and zinc-doped BBGs by employing processed …
Strategies To Mitigate Efflorescence In Walls Constructed Using Clays Bricks; A Review Article,
2024
Material Engineering Department, College of engineering, Mustansiriyah University, Baghdad, Iraq
Strategies To Mitigate Efflorescence In Walls Constructed Using Clays Bricks; A Review Article, Marwa Abdulkareem. Anber, Soran Abdulrahman Ahmad, Naros Rahman Mahmoud, Kawan Fuoad. Kayani, Mohammed Ali Abdulrehman
Al-Esraa University College Journal for Engineering Sciences
The construction of buildings, especially residential housing for communities, is a significant industry on a global scale. Masonry units such as bricks, blocks, and stones are often utilized materials. Bricks are highly regarded because to their widespread availability, cost-effectiveness, and excellent insulating capabilities. Nevertheless, the presence of efflorescence presents a difficulty in the construction of brick walls. Efflorescence refers to the process in which salts move to the outer layer of the brick, resulting in the formation of white deposits and negatively impacting its visual appeal. Efflorescence is caused by various circumstances, such as the existence of salts in bricks, …
The Importance Of Cryptography In Cloud Computing,
2024
Department of Control and Systems Engineering, University of Technology, Baghdad, Iraq
The Importance Of Cryptography In Cloud Computing, Saja Alaam Talib
Al-Esraa University College Journal for Engineering Sciences
Cloud computing has grown as a widely accepted concept simultaneously, as the alarms for the security of data and information. This paper seeks to establish the comprehensive roles of cryptography in tackling these issues in the Cloud environment. The study begins with the historical background of cryptography and then moves on to analyze trends in information technology before discussing on the challenges to security in cloud computing. The goal of its publication is to highlight the importance of using cryptographic technologies for the protection of information confidentiality, its integrity and compliance. The combination of literature review and the case study …
A Concept Of Producing Aluminum In-Situ On The Moon Through Molten Salt Electrolysis,
2024
Missouri University of Science and Technology
A Concept Of Producing Aluminum In-Situ On The Moon Through Molten Salt Electrolysis, Jacob N. Ortega, Jeffrey Smith, Fateme Rezaei, David Bayless, William Schonberg, Daniel Stutts, Daoru Han
Materials Science and Engineering Faculty Research & Creative Works
This paper presents a concept of producing aluminum in-situ on the lunar surface, namely, the Lunar In-Situ Aluminum Production through Molten Salt Electrolysis (LISAP-MSE) method developed at Missouri University of Science and Technology. This paper aims to demonstrate the use of electro-deoxidation to reduce aluminum oxide (i.e., alumina) into aluminum and oxygen gas via electrolysis in a molten salt bath for the production of aluminum on the Moon. It is shown that with a steady supply of hydrogen chloride, this in-situ resource utilization (ISRU) method could supply several necessary materials consumed in the electro-deoxidation process except hydrogen chloride to produce …
Flow Regimes In Bubble Columns With And Without Internals: A Review,
2024
Missouri University of Science and Technology
Flow Regimes In Bubble Columns With And Without Internals: A Review, Ayat N. Mahmood, Amer A. Abdulrahman, Laith S. Sabri, Abbas J. Sultan, Hasan Shakir Majdi, Muthanna H. Al-Dahhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
Hydrodynamics characterization in terms of flow regime behavior is a crucial task to enhance the design of bubble column reactors and scaling up related methodologies. This review presents recent studies on the typical flow regimes established in bubble columns. Some effort is also provided to introduce relevant definitions pertaining to this field, namely, that of "void fraction" and related (local, chordal, cross-sectional and volumetric) variants. Experimental studies involving different parameters that affect design and operating conditions are also discussed in detail. In the second part of the review, the attention is shifted to cases with internals of various types (perforated …
Gas-Phase Adsorption Of Dimethyl Methylphosphonate Over Ce(Oh)4@Pim-1 Composites Prepared Via Matrix Incorporation And Surface Coating Methods,
2024
Missouri University of Science and Technology
Gas-Phase Adsorption Of Dimethyl Methylphosphonate Over Ce(Oh)4@Pim-1 Composites Prepared Via Matrix Incorporation And Surface Coating Methods, Sukanta K. Mondal, Peter O. Aina, Ali A. Rownaghi, Fateme Rezaei
Chemical and Biochemical Engineering Faculty Research & Creative Works
This Study Investigated the Potential of Polymer of Intrinsic Microporosity (PIM-1) and Ce(OH)4@PIM-1 Composites for Adsorption of the Nerve Agent Simulant, Dimethyl Methylphosphonate (DMMP). through Experimental Investigations It Was Demonstrated that These Composite Adsorbents Exhibit Excellent Gas-Phase DMMP Adsorption Performance, with High Uptake Capacities and Relatively Fast Kinetics. This Study Further Examined the Effect of Two Composite's Preparation Methods, Namely Matrix Incorporation and Surface Coating, on the DMMP Adsorption Performance of Ce(OH)4@PIM-1. the Results Revealed that Coating of Ce(OH)4 on the PIM-1 Surface Gives Rise to Faster Adsorption Kinetics Than its Incorporation into the Polymer Matrix at Fixed 30 Wt …
Effect Of Various Irrigation Protocols And Antioxidant Application On Bonding Performance Of Two Adhesive Systems To Coronal Dentin,
2024
Missouri University of Science and Technology
Effect Of Various Irrigation Protocols And Antioxidant Application On Bonding Performance Of Two Adhesive Systems To Coronal Dentin, Nada Omar, Haidy N. Salem, Ahmed Abdou, Lamiaa M. Moharam
Chemical and Biochemical Engineering Faculty Research & Creative Works
Background: The aim was to evaluate the effect of different irrigation protocols and antioxidants application on the shear bond strength (SBS) of two different adhesive systems to deep coronal dentin at different temperature. Material and Methods: One hundred and twenty human premolar teeth were cut longitudinally in two halves, then the prepared specimens were allocated into four main groups according to the irrigation protocols; Distilled water (control), Sodium hypochlorite (NaOCl) + Ethylenediamine Tetra-acetic Acid (EDTA), and NaOCl + Editronate (HEDP), two subgroups according to irrigation solutions temperature; 4°C and 37°C, two divisions according to grape seed extract (GSE) application (with …
Molecular Imaging Nanoprobes And Their Applications In Atherosclerosis Diagnosis,
2024
Missouri University of Science and Technology
Molecular Imaging Nanoprobes And Their Applications In Atherosclerosis Diagnosis, Huari Kou, Hu Yang
Chemical and Biochemical Engineering Faculty Research & Creative Works
Molecular imaging has undergone significant development in recent years for its excellent ability to image and quantify biologic processes at cellular and molecular levels. Its application is of significance in cardiovascular diseases, particularly in diagnosing them at early stages. Atherosclerosis is a complex, chronic, and progressive disease that can lead to serious consequences such as heart strokes or infarctions. Attempts have been made to detect atherosclerosis with molecular imaging modalities. Not only do imaging modalities develop rapidly, but research of relevant nanomaterials as imaging probes has also been increasingly studied in recent years. This review focuses on the latest developments …
Development Of A Deep Neural Network And Empirical Model For Predicting Local Gas Holdup Profiles In Bubble Columns,
2024
Missouri University of Science and Technology
Development Of A Deep Neural Network And Empirical Model For Predicting Local Gas Holdup Profiles In Bubble Columns, Sebastián Uribe, Ahmed Alalou, Mario E. Cordero, Muthanna H. Al-Dahhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
Estimating local gas holdup profiles in bubble columns is key for their performance evaluation and optimization, as well as for design and scale-up tasks. Up to the current day, there are important limitations in the accuracy and range of applicability of the available models in literature. Two alternatives for the prediction of such local fields can be found in the application of empirical models and the development of deep neural networks (DNN). The main drawback preventing the application of these techniques in previous years was the availability of a large enough databank of local gas holdup experimental measurements. Advances over …
Magnetic Separation Of Lunar Regolith Simulants With Applications To In Situ Resource Utilization On The Moon,
2024
Missouri University of Science and Technology
Magnetic Separation Of Lunar Regolith Simulants With Applications To In Situ Resource Utilization On The Moon, Peter Bachle, Jeffrey Smith, Fateme Rezaei, David Bayless, William Schonberg, Daoru Han
Chemical and Biochemical Engineering Faculty Research & Creative Works
The development of in situ resource utilization (ISRU) for metal extraction is imperative as a steppingstone for habitation construction in lunar and non-terrestrial environments. Separation of minerals by chemical composition is important to optimize metal and oxygen liberation from lunar ore. To this effect, devices capable of separating aluminum bearing minerals from iron-bearing minerals from the lunar regolith simulants have been developed. Twenty-eight different simulants have been used in this study. A dual-belt separator was designed to reduce middling. Para-magnetic minerals were reliably separated using a neodymium N52-magnet-separator system. Effective separation of aluminum-bearing minerals from iron-bearing minerals was greater than …
Fit-For-Purpose Heavy-Duty Fishing Equipment Designed To Safely Retrieve A Damaged Wireline Cable From An Active, Sour Gas Well Located Offshore,
2024
Missouri University of Science and Technology
Fit-For-Purpose Heavy-Duty Fishing Equipment Designed To Safely Retrieve A Damaged Wireline Cable From An Active, Sour Gas Well Located Offshore, M. N. Amri, R. Macaulay, S. Aboelnaga, A. Abouganem, M. Al Dahhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
Wireline operations play a crucial role in the oil and gas industry, facilitating essential tasks like well maintenance, data collection, and intervention. These operations involve deploying substantial downhole tools and large cables into the wellbore, but this endeavor is not without its challenges. Particularly, when a wireline cable breaks downhole, it poses significant risks. Unplanned wireline breakages result in demanding heavy-duty fishing operations when they occur in challenging offshore environments and unfavorable downhole conditions. in this work, strategic planning and execution were applied in a complex e-line cable recovery in a live, sour gas well without the need for well …
Pharmacology Of Boldine: Summary Of The Field And Update On Recent Advances,
2024
Missouri University of Science and Technology
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 …
Novel Re-Crosslinkable Preformed Particle Gels (Rppg) For Parent- And Infill-Well-Fracture Interactions Mitigation,
2024
Missouri University of Science and Technology
Novel Re-Crosslinkable Preformed Particle Gels (Rppg) For Parent- And Infill-Well-Fracture Interactions Mitigation, Xiaojing Ge, Adel Alotibi, Ahmed Al-Hlaichi, Yanbo Liu, Tao Song, Junchen Liu, Baojun Bai, Thomas P. Schuman
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Hydraulic fracturing treatments in unconventional infill (or "child") wells can be significantly affected by depletion from existing parent-well, resulting in asymmetrical fracture growth. These issues may lead to excessive load-water production, proppant deposition, casing deformation in the parent well, and unbalanced stimulation of infill wells. To mitigate these effects, various strategies have been proposed, including the use of far-field diverters in child wells and repressurization of parent wells. Additionally, an increasingly popular strategy involves injecting near-wellbore diverters to temporarily plug entry points into the parent wellbores during frac operations on infill wells. To achieve better application, a novel low-cost, self-degradable, …
Descriptive Statistical Analysis Of Experimental Data For Wettability Alteration With Smart Water Flooding In Carbonate Reservoirs,
2024
Missouri University of Science and Technology
Descriptive Statistical Analysis Of Experimental Data For Wettability Alteration With Smart Water Flooding In Carbonate Reservoirs, Muhammad Ali Buriro, Mingzhen Wei, Baojun Bai, Ya Yao
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Smart water flooding is a promising eco-friendly method for enhancing oil recovery in carbonate reservoirs. the optimal salinity and ionic composition of the injected water play a critical role in the success of this method. This study advances the field by employing machine learning and data analytics to streamline the determination of these critical parameters, which are traditionally reliant on time-intensive laboratory work. the primary objectives are to utilize data analytics to examine how smart water flooding influences wettability modification, identify key parameter ranges that notably alter the contact angle, and formulate guidelines and screening criteria for successful lab design. …
Electrostatic Sorting Of Lunar Regolith Simulants For Sustainable Resource Utilization: Modeling And Characterization Of Particle Size Distribution,
2024
Missouri University of Science and Technology
Electrostatic Sorting Of Lunar Regolith Simulants For Sustainable Resource Utilization: Modeling And Characterization Of Particle Size Distribution, Abdullah Al Moinee, Peter Bachle, Kyle Newport, William Schonberg, David Bayless, Jeffrey Smith, Daoru Han, Fateme Rezaei
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In pursuit of sustainable resource utilization on the Moon, this paper delves into modeling and characterization of particle size distribution (PSD) of lunar regolith simulants in an electrostatic system. A prototype electrostatic sieve was built and tested with four sample simulants mirroring properties of lunar mare and highland regolith. An alternating four-phase (90 degrees, 180 degrees, 270 degrees, 360 degrees) traveling square-wave was utilized for particle-directed transport to model the diverse trajectories of the particles. Numerically, we scrutinized how the distribution functions of the particles are manifested as the electrostatic field propagates, with a focus on three distinct particle ranges …
การวิเคราะห์เชิงเศรษฐศาสตร์เทคโนโลยีของแนวทางการผลิตไฮโดรเจนสำหรับกระบวนการเปลี่ยนคาร์บอนไดออกไซด์เป็นเมทานอลและเปลี่ยนเมทานอลเป็นโอลิฟินส์,
2024
คณะวิศวกรรมศาสตร์
การวิเคราะห์เชิงเศรษฐศาสตร์เทคโนโลยีของแนวทางการผลิตไฮโดรเจนสำหรับกระบวนการเปลี่ยนคาร์บอนไดออกไซด์เป็นเมทานอลและเปลี่ยนเมทานอลเป็นโอลิฟินส์, กันตภณ มานิมนต์
Chulalongkorn University Theses and Dissertations (Chula ETD)
อุตสาหกรรมปิโตรเคมีเป็นหนึ่งในแหล่งปล่อยก๊าซคาร์บอนไดออกไซด์ (CO2) คิดเป็นสัดส่วนใหญ่ของโลก โดยเฉพาะจากกระบวนการแครกเกอร์แนฟทาด้วยไอน้ำ (Steam Naphtha Cracking) การดักจับและใช้ประโยชน์จากคาร์บอน (Carbon Capture and Utilization: CCU) จึงเป็นแนวทางที่ได้รับความสนใจเพื่อลดการปล่อย CO2 หนึ่งในกระบวนการที่มีศักยภาพคือ ไฮโดรเจนของคาร์บอนไดออกไซด์ (Hydrogenation of CO2) เพื่อผลิตเมทานอล ซึ่งเมทานอลสามารถนำไปใช้เป็นวัตถุดิบในกระบวนการแปรรูปเป็นโอเลฟินส์ (Methanol-to-Olefins: MTO) ได้อีกด้วย งานวิจัยนี้ศึกษาแนวทางการผลิตไฮโดรเจนซึ่งเป็นสารตั้งต้นที่สำคัญของกระบวนการ โดยศึกษา3 ประเภท ได้แก่ ไฮโดรเจนสีเทา (Grey Hydrogen) จากกระบวนการ Steam Methane Reforming (SMR), Autothermal Reforming (ATR) และ SMR ร่วมกับ ATR, ไฮโดรเจนสีน้ำเงิน (Blue Hydrogen) และไฮโดรเจนสีเขียว (Green Hydrogen) จากกระบวนการอิเล็กโทรไลซิส (AEL) โดยทำการจำลองกระบวนการด้วย Aspen Plus และประเมินค่าเชิงเศรษฐศาสตร์ด้วยค่า LCOH (Levelized Cost of Hydrogen) ผลการศึกษาแสดงให้เห็นว่า ไฮโดรเจนสีเทาแบบ SMR มี LCOH ต่ำที่สุดที่ 1.03 USD/kg H2 แต่ปล่อย CO2 สูงสุด 13.44 kg CO2/kg H2 ขณะที่ไฮโดรเจนสีน้ำเงินให้การลด CO2 ที่ดีขึ้น 6.85 kg CO2/kg H2 ด้วยต้นทุนที่เพิ่มขึ้น 1.16 USD/kg H2 ส่วนไฮโดรเจนสีเขียวปล่อย CO2 ต่ำที่สุดแต่มีต้นทุนสูงสุดที่ 4.38 USD/kg H2 ดังนั้นการเลือกใช้แหล่งผลิตไฮโดรเจนที่เหมาะสมจึงมีผลโดยตรงต่อประสิทธิภาพและความยั่งยืนของกระบวนการผลิตเมทานอลและโอเลฟินส์ในอนาคต
Temperature Control In The Steam Methane Reformer Using Model Predictive Control Based On A Neural Network Model,
2024
Faculty of Engineering
Temperature Control In The Steam Methane Reformer Using Model Predictive Control Based On A Neural Network Model, Rasiq Dipta Alkindi
Chulalongkorn University Theses and Dissertations (Chula ETD)
Hydrogen is a critical energy vector, and magnetic heating reactors represent a promising production technology where current-induced magnetization raises system temperature. Due to the nonlinear and complex thermal dynamics, this study applies a hybrid Echo State Network (ESN) and Long Short-Term Memory (LSTM) model to capture system behavior, combining ESN’s nonlinear dynamic identification with LSTM’s ability to learn long-term dependencies. Hyperparameters were optimized for best performance at 30 reservoir nodes, 0.5 spectral radius, 0.9 connectivity, batch size 4, 50 LSTM units, and 60 epochs. The ESN-LSTM models with 3-input and 4-input feature sets were tested on three winding coil geometries …
Investigation Of Molecular Interactions In Electrocatalysis Using Atomic Force Microscopy,
2024
Faculty of Engineering
Investigation Of Molecular Interactions In Electrocatalysis Using Atomic Force Microscopy, Parivat Phiphatbunyabhorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Electrocatalysis at the nanoscale is fundamentally governed by molecular interactions, but these processes remain poorly understood due to their difficulty to directly investigate and their complex nature. In this study, atomic force microscopy (AFM)-based force spectroscopy is employed to investigate interfacial forces and reactivity in two representative systems: the electrochemical deterioration and healing of Au nanothin films on n-type silicon and the electrocatalytic reduction of MEA-CO2 adduct on Cu electrocatalysts. In the Au nanothin film system, observing that surface degradation is mediated by anionic cluster interactions and modulated by intrinsic band bending and surface energy effects. Remarkably, 20-nm Au films …
Enhancement Of The Performance And Emission Attributes For The Diesel Engine Using Diesel-Waste Cooking Oil Biodiesel And Graphene Oxide Nanofluid Blends Through Response Surface Methodology,
2024
Mechanical Power Engineering Departments, Faculty of Engineering, Tanta, University, Tanta, Egypt
Enhancement Of The Performance And Emission Attributes For The Diesel Engine Using Diesel-Waste Cooking Oil Biodiesel And Graphene Oxide Nanofluid Blends Through Response Surface Methodology, Medhat Elkelawy Prof. Dr. Eng., E A El Shenawy, Hagar Alm-Eldin Bastawissi, Mahmoud M. Shams
Mansoura Engineering Journal
This study examined how diesel fuel and waste-cooked oil (WCO) biodiesel blends added by various concentrations of graphene oxide (GO) nanoparticles can effect on the performance and emission characteristics of constant-speed, four-stroke, single-cylinder, water-cooled diesel engines. The GO nanoparticles concentrations are 50,100 and 150 ppm dispersed in different diesel-WCO biodiesel blends are pure diesel fuel (B0), 20% WCO biodiesel and 76% diesel fuel (B20), and 40% WCO biodiesel and 56% diesel fuel (B40). In addition 4% toluene in all blends which used as a surfactant. The diesel engine fueled with these blends and operated at various engine loads are 2, …
Pit Design And Mine Planning Of Nong Wa Sub-Basin, Sin Pun Coal Deposit, Southern Thailand,
2024
Faculty of Engineering
Pit Design And Mine Planning Of Nong Wa Sub-Basin, Sin Pun Coal Deposit, Southern Thailand, Gbenga Timilehin Adewumi
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nong Wa is a sub-basin located within the Sin Pun coal deposit, which has no history of mining activities. This study focused on the planning and design of the sub-basin pit, potentially paving the way for future mining operations in the region. The objective of the research was to evaluate the economic viability of coal extraction and to develop an optimized pit to maximize resource recovery. To achieve this objective, a coal seam model of the deposit was created using advanced modeling software such as AutoCAD and MineSight. The seam model was used to design the ultimate pit, pushback, and …
