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A Discursive Analysis Of Lesbian And Queer Experiences Of Unwanted Consensual Sex, Sarah E. Swanson Aug 2026

A Discursive Analysis Of Lesbian And Queer Experiences Of Unwanted Consensual Sex, Sarah E. Swanson

Graduate Doctoral Dissertations

This study drew on a critical discursive psychology (CDP) analytical approach to examine how lesbian and queer participants made sense of unwanted consensual sex (UCS).  The data analysis traced how UCS was constructed on three discursive levels: the construction of UCS across narratives, the interpretive repertoires mobilized (including sexual scripts), and the broader sociocultural discourses that shaped what elements of their experiences were intelligible. Therefore, I sought to understand both how participants drew on familiar heteronormative and queer ways of talking about sex and how various discursive resources shaped how they could construct themselves and others. Data for this research …


Solving For X: Centering Black Girls’ Experiences In Mathematics Education, Natasha A. Fortes Aug 2026

Solving For X: Centering Black Girls’ Experiences In Mathematics Education, Natasha A. Fortes

Graduate Doctoral Dissertations

Black girls can grow up, attend school, and move through their math classes without ever feeling seen as capable mathematical thinkers. Their teachers may not affirm their brilliance. Their voices may even go unheard. Math classes may not be a space where they can imagine themselves belonging. These experiences do not reflect ability. Instead, they reflect on the conditions in which they are expected to learn. This study centers the voices of Black girls and asks what they deserve from their mathematics education and instructors to develop a mathematics identity. The study is grounded in Black feminist traditions and draws …


Multicomponent Reaction-Initiated Synthesis Of Polyheterocyclic Compounds, Ashutosh Nath Aug 2026

Multicomponent Reaction-Initiated Synthesis Of Polyheterocyclic Compounds, Ashutosh Nath

Graduate Doctoral Dissertations

Efficient synthesis of novel heterocycles with biological interest remains a challenge in modern organic chemistry. This dissertation presents the development of efficient synthetic strategies that combine multicomponent reactions (MCRs) with sequential reactions for rapid access a diverse array of polyheterocyclic compounds. The projects are: 1) Groebke-Blackburn-Bienaymé (GBB) reaction followed by N-acylation and Friedel-Crafts (FC) cyclization for the construction of imidazopyridine- and indole-fused azepinones involving an unusual ring-expansion process. 2) Modified GBB condensation products for intramolecular Diels-Alder (IMDA) cycloaddition and dehydrative re-aromatization to access imidazopyridine-fused isoquinolinones. 3) Integration of the Ugi-three component reaction (Ugi-3CR) and Pictet-Spengler (PS) reaction followed by …


The Difficulty In Defining The Construct Of Perseverance, Davon W. Ferrara, Linda W. Jones Aug 2026

The Difficulty In Defining The Construct Of Perseverance, Davon W. Ferrara, Linda W. Jones

Papers

Perseverance is a character virtue necessary for flourishing in the STEM disciplines; however, there are competing definitions of perseverance in scientific literature, which makes measuring the trait and researching its impact difficult. This work provides a review of the definitions of construct found within the literature and compares it to conflated terms such as grit, persistence, resilience, and self-efficacy that have related, but distinct meanings. Finally, we summarize the role of perseverance in STEM and what factors may influence its formation.

The authors gratefully acknowledge support from the Belmont Formation Collaborative and the Formation Scholars Cohort for Character Research and …


Writing Together, Writing Differently: Collective Authorship As Reflective Practice, Thanh Thao Le, Trut Thuy Pham Aug 2026

Writing Together, Writing Differently: Collective Authorship As Reflective Practice, Thanh Thao Le, Trut Thuy Pham

The Qualitative Report

This article examines collective authorship as a reflective and ethical research practice within a sustained program of co-authored qualitative, post-qualitative, linguistic, and reflective inquiries into teacher reflection, professional learning, language, silence, and recognition. It offers an oral-history-informed reflective methodological account of a writing collective and asks how collective authorship became a methodological practice through our collaborative writing process. The primary materials were shared drafts, margin comments, revisions, silences, version histories, short reflective notes, and remembered writing encounters. Teacher-reflection texts and related professional writing materials from our broader research program formed the secondary materials around which the writing process unfolded. Analytically, …


Modeling Kinetics Of 5-Aminolevulinic Acid-Induced Protoporphyrin Ix Accumulation For Optimal Photodynamic Therapy, Priscilla Melebor Aug 2026

Modeling Kinetics Of 5-Aminolevulinic Acid-Induced Protoporphyrin Ix Accumulation For Optimal Photodynamic Therapy, Priscilla Melebor

Graduate Masters Theses

Photodynamic therapy (PDT) is a minimally invasive treatment that uses light-activated photosensitizers to selectively destroy diseased tissue through the generation of reactive oxygen species. However, conventional in vitro models often fail to accurately reproduce the pharmacokinetics of photosensitizer accumulation and clearance observed in vivo. This study investigated protoporphyrin IX (PpIX) accumulation following 5-aminolevulinic acid (ALA) exposure under physiologically relevant conditions using two-dimensional (2D) monolayers and three-dimensional (3D) spheroids. By comparing continuous ALA exposure with transient exposure followed by ALA washout, this work provides a more biologically relevant framework for studying PpIX kinetics and optimizing photodynamic therapy.


Competition Policy Meets Environmental Regulation: A Case For ‘Green’ Antitrust, Marie-Laure Cabon-Dhersin Dr., Joanna Poyago-Theotoky, Natacha Raffin Aug 2026

Competition Policy Meets Environmental Regulation: A Case For ‘Green’ Antitrust, Marie-Laure Cabon-Dhersin Dr., Joanna Poyago-Theotoky, Natacha Raffin

Fondazione Eni Enrico Mattei Working Papers

We explore the interplay of competition and environmental policies to address the question of whether green antitrust has beneficial effects in terms of both en vironmental and consumer welfare performance. We focus on two environmental policy tools, an emission tax and an emission standard, and explore three par ticular configurations: competitive ‘green R&D, collaborative ‘green’ R&D in the form of a joint lab, and the benchmark case of no ‘green’ R&D. Firms compete in the product market by selling a homogeneous product, either by setting prices (Bertrand competition) or quantities (Cournot competition) while facing convex costs. We show that ‘green …


Crosstalk Between Upr And Mitochondria: The Triad Of Er-Mitochondria Contacts, Ca²⁺, And Ros, Ester Zito, György Hajnóczky Aug 2026

Crosstalk Between Upr And Mitochondria: The Triad Of Er-Mitochondria Contacts, Ca²⁺, And Ros, Ester Zito, György Hajnóczky

Department of Pathology, Anatomy, and Cell Biology Faculty Papers

Endoplasmic reticulum (ER) stress is triggered by several cellular perturbations causing protein misfolding, and activates the unfolded protein response (UPR), an initially adaptive signaling network that aims to restore ER and cellular homeostasis. Growing evidence indicates that UPR signaling extends beyond ER proteostasis, influencing mitochondrial function and bioenergetics through ER-mitochondria contact sites (ERMCs). The CHOP-ERO1A-IP3R axis has a primary role in recruiting mitochondria to adaptive UPR. However, its sustained activation renders UPR signaling maladaptive, leading to mitochondrial dysfunction through both outer mitochondrial membrane permeabilization (OMMP) and mitochondrial permeability transition pore (mPTP) opening, ultimately contributing to irreversible cell injury and disease …


Ai Parameters For Enhancing Spine Surgery Outcomes: A Narrative Review, Victoria Verrengia, Frank Vrionis Aug 2026

Ai Parameters For Enhancing Spine Surgery Outcomes: A Narrative Review, Victoria Verrengia, Frank Vrionis

All Publications

Background and objective: Artificial intelligence (AI) is increasingly applied in spine surgery for diagnosis, operative planning, intraoperative guidance, and outcome prediction. However, reported technical performance does not always translate into clinical reliability. This narrative review evaluates how parameter-level decisions influence the reliability and clinical translation of AI models in spine surgery.

Methods: A structured literature search of PubMed, Scopus, and Google Scholar was performed for English-language studies published from January 2015 through March 2025. Search terms combined spine surgery concepts with AI, machine learning, deep learning, hyperparameters, learning rate, feature selection, regularization, model validation, and training strategy. Studies were synthesized …


How Do Governments Combat Jihad Online?, Noah Cook Aug 2026

How Do Governments Combat Jihad Online?, Noah Cook

Honors College Theses

Since the September 11th, 2001 attacks, jihadist groups like ISIS, al-Qaeda, and al-Shabaab have used the internet as a tool for recruitment, radicalization, and propaganda dissemination. Since then, governments, non-governmental organizations, and private companies have developed strategies to combat jihadism on the internet. This paper examines how these actors have worked to mitigate the digital jihadist footprint and its effects by analyzing three main approaches to countering violent Islamist extremism on the internet: counter narrative initiatives, awareness-raising programs, and content removals. This paper finds that each of these methods has its own strengths and weaknesses. Counter narrative campaigns show the …


Flaxseed Ethanolic Extract Modulates Β-Catenin And Dkk1 Expressions During Osteoblast Differentiation Of Dental Pulp-Derived Stem Cells, Nur Sazwi Nordin, Khairani Idah Mokhtar, Omar Abdul Jabbar Abdul Qader, Basma Ezzat Mustafa, Widya Lestari, Deny Susanti Darnis, Thirumulu Ponnuraj Kannan, Azlina Ahmad, Solachuddin Jauhari Arief Ichwan Aug 2026

Flaxseed Ethanolic Extract Modulates Β-Catenin And Dkk1 Expressions During Osteoblast Differentiation Of Dental Pulp-Derived Stem Cells, Nur Sazwi Nordin, Khairani Idah Mokhtar, Omar Abdul Jabbar Abdul Qader, Basma Ezzat Mustafa, Widya Lestari, Deny Susanti Darnis, Thirumulu Ponnuraj Kannan, Azlina Ahmad, Solachuddin Jauhari Arief Ichwan

Journal of Dentistry Indonesia

Background: WNT signaling regulates osteogenic differentiation of mesenchymal stem cells (MSC) through the canonical WNT pathway. β-catenin; an important molecule of WNT pathway, and DKK1; a WNT antagonist, play important roles in regulating bone formation. Although flaxseed (Linum usitatissimum) has various health benefits, including promoting bone health, our previous study showed that flaxseed ethanolic extract (FEE) reduced the osteoblast differentiation potential of stem cells from human exfoliated deciduous teeth (SHED). This study aimed to determine the effects of FEE on WNT pathway-related molecules, β-catenin and DKK1, during osteoblast differentiation of SHED.

Methods: RNA at Day 7, 14, …


Loralee Clark, Loralee Clark, Loralee Clark Aug 2026

Loralee Clark, Loralee Clark, Loralee Clark

Virginia Poets Database: A Literary and Educational Resource

No abstract provided.


Analysis Of Pharmacotherapy And Non-Pharmacotherapy Burden From The Ina-Cbgs Package For Cesarean Section Surgery At The Regional General Hospital Dr. Soedarso In 2023, Ananda Rizky Awwaliyah, Nurmainah Nurmainah, Ridha Ulfah Aug 2026

Analysis Of Pharmacotherapy And Non-Pharmacotherapy Burden From The Ina-Cbgs Package For Cesarean Section Surgery At The Regional General Hospital Dr. Soedarso In 2023, Ananda Rizky Awwaliyah, Nurmainah Nurmainah, Ridha Ulfah

Pharmacology and Clinical Pharmacy Research

The prevalence of cesarean sections has been increasing each year. Previous studies show that the cost of medications and medical supplies for cesarean patients accounts for one-third of the total care costs. In the era of National Health Insurance (NHI), medications and medical supplies are considered operational expenses for hospitals rather than sources of income. This condition requires proper medication management and the use of medical supplies. This study aims to analyze the percentage of pharmacotherapy and non-pharmacotherapy, including the types and quantities of medications as well as disposable medical supplies used on patients undergoing cesarean section procedures at the …


The Rider (2026-08-31), Daniela Chapa-Reyes Aug 2026

The Rider (2026-08-31), Daniela Chapa-Reyes

The Rider Archives

Vol. 12, No. 2


A Statistical Mechanics Approach To Reinforcement Learning, Jacob Adamczyk Aug 2026

A Statistical Mechanics Approach To Reinforcement Learning, Jacob Adamczyk

Graduate Doctoral Dissertations

Reinforcement learning (RL), the study of optimal decision-making over long timescales in stochastic systems, has recently seen remarkable advances due in large part to the efforts of the deep learning community. RL has witnessed great success in solving problems in video games, robotics, biological control, and language modeling. However, a unified statistical mechanics framework to understand and develop the corresponding algorithms is lacking. To address this issue, we begin by showing that the reinforcement learning problem can be formulated and solved using the tools of statistical mechanics. Drawing on physical principles of free energy minimization and invariance, we address important …


Innovating A Crustacean Embryo Toxicity (Cet) Assay For Screening Environmental Contaminants, Irina A. Polunina-Proulx Aug 2026

Innovating A Crustacean Embryo Toxicity (Cet) Assay For Screening Environmental Contaminants, Irina A. Polunina-Proulx

Graduate Doctoral Dissertations

Environmental pollutants can disrupt normal developmental processes, leading to neurobehavioral and developmental abnormalities. Toxicity tests are important for evaluating environmental contaminants; however, standard assays are often time- and cost-intensive and typically require large numbers of vertebrate animals. These limitations highlight the need to reduce reliance on vertebrate testing and to develop New Approach Methodologies that provide comparable results while improving efficiency and cost-effectiveness. This research utilizes a novel screening assay to evaluate developmental toxicity using Hyalella azteca. H. azteca is a freshwater amphipod widely used as a model organism for sediment toxicity in ecotoxicology, yet its embryos have been minimally …


I Must Be Well, To Do Well: Examining The Relationship Between Toxic Stem Environments, Trauma, Stem Support, And Academic Outcomes Among Diverse Graduate Women In Stem, Aisha Farra Aug 2026

I Must Be Well, To Do Well: Examining The Relationship Between Toxic Stem Environments, Trauma, Stem Support, And Academic Outcomes Among Diverse Graduate Women In Stem, Aisha Farra

Graduate Doctoral Dissertations

Women, particularly Women of Colour (WOC), remain underrepresented in STEM. In the last two decades, research has sought to better understand women’s experiences in STEM, highlighting challenges such as isolation, sexism, and racism, which negatively impact mental health and STEM persistence. While these mental health challenges have been documented, further work is needed to examine how these experiences are related to trauma symptoms and physical health outcomes, as well as the mechanisms through which they shape academic outcomes. This quantitative study investigated the relationships among toxic STEM experiences (i.e., gendered racism, sexism, and isolation), trauma symptoms and physical health concerns, …


Home, Neighborhood, And Community Environments And Social Isolation In Later Life: Joint Associations And Their Moderation By Life-Course Socioeconomic Mobility, Jeein Law Aug 2026

Home, Neighborhood, And Community Environments And Social Isolation In Later Life: Joint Associations And Their Moderation By Life-Course Socioeconomic Mobility, Jeein Law

Graduate Doctoral Dissertations

Social isolation is a major public health concern among older adults, yet less is known about how multilevel residential environments shape isolation among those aging in place. Guided by the Socio-Ecological Model, Person–Environment Fit, and a life-course perspective, this dissertation examined whether micro-level home hazards, meso-level neighborhood social cohesion and physical disorder, and macro-level census-tract structural conditions were associated with social isolation. It also examined whether life-course socioeconomic mobility moderated the associations between home and neighborhood environments and social isolation.

This dissertation used two nationally representative longitudinal studies of U.S. older adults. Aims 1 and 2 used the National Health …


Dynamics Of Swimming Microorganisms At Structured Liquid Crystal Interfaces, Vajra Sabhapathy Badha Aug 2026

Dynamics Of Swimming Microorganisms At Structured Liquid Crystal Interfaces, Vajra Sabhapathy Badha

Graduate Doctoral Dissertations

Active matter systems are self-driven units that consume energy to generate motion and mechanical stresses, producing non-equilibrium states of broad physical significance. Examples include synthetic microswimmers and migrating cells. Motile bacteria are a widely studied biological example because their self-propelled motion, hydrodynamic interactions, and collective organization are strongly coupled to local environmental conditions. Their swimming is sensitive to interfacial viscoelasticity, ordering, confinement, and hydrodynamic boundary effects, making them useful for investigating how interfaces regulate active biological motion. Because bacterial accumulation and attachment at interfaces are central to colonization and biofilm formation, these interactions are relevant to both active matter physics …


Lanthorn, Vol. 61, No. 02, August 31, 2026, Grand Valley State University Aug 2026

Lanthorn, Vol. 61, No. 02, August 31, 2026, Grand Valley State University

Volume 61, August 10, 2026 – current

Lanthorn is Grand Valley State's student newspaper, published from 1968 to the present.


A Discrepancy Evaluation Of Workforce Capacity And Emerging Skills: A Utah Case Study, Lendel K. Narine, Paul A. Hill, Andreé Walker-Bravo Aug 2026

A Discrepancy Evaluation Of Workforce Capacity And Emerging Skills: A Utah Case Study, Lendel K. Narine, Paul A. Hill, Andreé Walker-Bravo

Extension Research

This study examined employer-perceived competency discrepancies, anticipated competency requirements, hiring barriers, and valued educational experiences in Utah. Survey data were collected between September and October 2025 from 226 individuals with hiring responsibility in Utah-based organizations. The Ranked Discrepancy Model (RDM) quantified discrepancies between respondents’ ratings of competency importance and their satisfaction with demonstrated employee proficiency. Respondents reported the largest discrepancies for time management, critical thinking, conflict resolution, ethical judgment, and verbal communication of ideas. Respondents rated communication, collaboration, analytical thinking, and lifelong learning highest among competencies anticipated to matter most over the next five to ten years. Most employers identified …


Comm 11 Fundamentals Of Interpersonal Communication Textbook, Teresa A. Fisher Aug 2026

Comm 11 Fundamentals Of Interpersonal Communication Textbook, Teresa A. Fisher

Open Educational Resources

A survey of interpersonal communication.


Autoethnography: Understandings, Evolution, And The Influence Of Genai, Prokopis Christou Aug 2026

Autoethnography: Understandings, Evolution, And The Influence Of Genai, Prokopis Christou

The Qualitative Report

Autoethnography occupies a central place within qualitative research because of its focus on lived experience, reflexivity, and meaning-making. In this paper, I critically examine the implications of generative artificial intelligence (GenAI) for autoethnographic inquiry through a reflexive and theoretically informed discussion situated within the contemporary AI-mediated era. By revisiting key understandings and developments of autoethnography while drawing on technological mediation theory, I explore how GenAI extends beyond a mere tool to become a mediating mechanism capable of profoundly shaping autoethnographic practice. Attention is given to how seemingly minor AI-generated alterations may transform lived experience into more polished, coherent, and emotionally …


Vetiver Biochar Application For Heavy Metal Sequestration In Water Treatment: Bridging Perfumery Waste And Environmental Sustainability, Sameer Neve, Viravid Na Nagara, Zhiming Zhang, Rupali Datta, Dibyendu Sarkar Aug 2026

Vetiver Biochar Application For Heavy Metal Sequestration In Water Treatment: Bridging Perfumery Waste And Environmental Sustainability, Sameer Neve, Viravid Na Nagara, Zhiming Zhang, Rupali Datta, Dibyendu Sarkar

Michigan Tech Publications

Converting industrial byproducts into functional adsorbents supports circular and sustainable approaches to water treatment. This study evaluated biochar derived from spent vetiver (Chrysopogon zizanioides) roots, a byproduct of the perfumery essential-oil industry, for the competitive adsorption of copper (Cu), cadmium (Cd), zinc (Zn), and lead (Pb). Vetiver root biochar produced at 500 °C for 60 min exhibited a high surface area of 308.2 m2/g and a yield of 53.8%. Batch adsorption experiments were performed in triplicate at a pH of 5.5 ± 0.2, in 0.1 M NaNO3, at 24 °C ± 2 °C, using 1% (w/v) biochar (10 g/L), with …


A Novel Approach For Evaluating And Comparing Multiple Antipsychotic Polypharmacy In Adults Across Specialist Intellectual Disability Services In England And Wales: A Retrospective Feasibility Cohort Study, Samuel J. Tromans, Helen Neilens, Crispin Musicha, Victoria Allgar, Emily Stanyard, Richard Laugharne, Paula Mcgowan, Angela Hassiotis, Sarah Lennard, Lance V. Watkins, Bhathika Perera, Kiran Purandare, Ashok Roy, Indermeet Sawhney, Sujeet Jaydeokar, Ryan Ashford, Chris Rollinson, Hanna Abraham, Nusra Khodabux, Ogheneochuko Akusu, Samuel Paisley, Georgios Mousailidis, Meera Naran, Rohit Shankar Aug 2026

A Novel Approach For Evaluating And Comparing Multiple Antipsychotic Polypharmacy In Adults Across Specialist Intellectual Disability Services In England And Wales: A Retrospective Feasibility Cohort Study, Samuel J. Tromans, Helen Neilens, Crispin Musicha, Victoria Allgar, Emily Stanyard, Richard Laugharne, Paula Mcgowan, Angela Hassiotis, Sarah Lennard, Lance V. Watkins, Bhathika Perera, Kiran Purandare, Ashok Roy, Indermeet Sawhney, Sujeet Jaydeokar, Ryan Ashford, Chris Rollinson, Hanna Abraham, Nusra Khodabux, Ogheneochuko Akusu, Samuel Paisley, Georgios Mousailidis, Meera Naran, Rohit Shankar

Peninsula Medical School

Background:In England and Wales, significant numbers of people with intellectual disability (PwID) are prescribed antipsychotics for a range of licensed and non-licensed indications, particularly behaviours that challenge. There is no system to compare antipsychotic prescribing practices across specialist adult intellectual disability (ID) services.Aim:This study aimed to determine whether converting antipsychotics and their doses to equivalent chlorpromazine units enables comparison of licensed (psychosis, etc.) and non-licensed (behaviours that challenge) prescribing between different services.Method:A feasibility retrospective cohort study using convenience sampling captured anonymized data of PwID on ⩾2 antipsychotics across eight specialist England and Wales adult ID services. The doses prescribed across …


Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft Diggings East Dewatering Treatability Study Pre-Design Investigation Work Plan (Pdiwp) (Dated August 24, 2026) And The 2026 Draft Diggings East Dewatering Treatability Study Quality Assurance Project Plan (Qapp) (Dated August 24, 2026), Emma Rott Aug 2026

Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft Diggings East Dewatering Treatability Study Pre-Design Investigation Work Plan (Pdiwp) (Dated August 24, 2026) And The 2026 Draft Diggings East Dewatering Treatability Study Quality Assurance Project Plan (Qapp) (Dated August 24, 2026), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Guardians Of The Record: A Two-Tiered Streaming Cascade With Kafka, Flink, And A Real Llm, Ilan Goodman Aug 2026

Guardians Of The Record: A Two-Tiered Streaming Cascade With Kafka, Flink, And A Real Llm, Ilan Goodman

Generative AI Teaching Activities

Students build a streaming vandalism detector for live Wikipedia edits in which a fast rule-based tier decides which few of ~1,500 edits per minute are worth escalating to a slow, rate-limited real LLM (Gemini) — confronting the cost, latency, and failure modes of putting AI inside a production data pipeline.


Optimizing Advanced Ehr And Enhanced Data-Sharing And Reporting In Rural Health Clinics, Adaeze Honesta Duru Aug 2026

Optimizing Advanced Ehr And Enhanced Data-Sharing And Reporting In Rural Health Clinics, Adaeze Honesta Duru

Walden Dissertations and Doctoral Studies

Rural clinics continue to face several barriers in utilizing advanced electronic health record (EHR) features, including interoperability, data sharing, and care coordination. The purpose of this integrative review was to investigate strategies to overcome barriers to the use of advanced EHRs and enhance data-sharing and reporting capabilities in rural clinics. The review question emphasized viable strategies for overcoming barriers to advanced EHR utilization and enhancing data-sharing and reporting capabilities in rural clinics. The consolidated framework for implementation research provided a conceptual model for understanding the various facets of EHR optimization. A literature search initially resulted in 135 relevant articles. After …


Determination Of The Content Of Water-Soluble Vitamins In The Composition Of Beet Beetroot Composition, Jasur Esirgapovich Safarov, Shakhnoza Abduvaxitovna Sultanova, Muhammad Rasul Oglu Najafli, Doston Ishmuhammat Ugli Samandarov Aug 2026

Determination Of The Content Of Water-Soluble Vitamins In The Composition Of Beet Beetroot Composition, Jasur Esirgapovich Safarov, Shakhnoza Abduvaxitovna Sultanova, Muhammad Rasul Oglu Najafli, Doston Ishmuhammat Ugli Samandarov

Chemical Technology, Control and Management

The aim of this study was to determine the content of water-soluble vitamins in various parts of beetroot (pulp, leaves and stems) that had been subjected to various drying methods in a bid to explore the effect of physical processes, i.e., the application of ultrasound, on micronutrient preservation. The experiments were performed at the Department of Service Technologies of Tashkent State Technical University, and chromatographic analysis was performed in the Institute of Bioorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan. Chromatography was performed on Agilent-1200 chromatograph with Exlipse XDB C18 column and diode array detector using …


Modeling Of A Two-Stage Extractive Distillation Process For The Separation Of 1,3-Butadiene From Pyrolysis-Derived C₄ Fractions, Muxriddin Xudoyor Og‘Li Ibodullayev, Jonibek Farxod O‘G‘Li Norqulov, Olim Rustamovich Abduraxmonov, Orifjon Sharipovich Kodirov Aug 2026

Modeling Of A Two-Stage Extractive Distillation Process For The Separation Of 1,3-Butadiene From Pyrolysis-Derived C₄ Fractions, Muxriddin Xudoyor Og‘Li Ibodullayev, Jonibek Farxod O‘G‘Li Norqulov, Olim Rustamovich Abduraxmonov, Orifjon Sharipovich Kodirov

Chemical Technology, Control and Management

The separation of 1,3-butadiene from pyrolysis-derived C₄ fractions represents a challenging task due to the multicomponent nature of the feed and the close boiling points of accompanying hydrocarbons. In this study, a two-stage extractive distillation process was investigated using an acetonitrile–water solvent system to address these challenges. A semi-industrial experimental unit consisting of two extractive distillation columns connected in series was developed and analyzed, and the process configuration was supported by Aspen Plus simulation. The feedstock composition was characterized in detail, revealing that 1,3-butadiene constitutes approximately 40 wt.% of the C₄ fraction, accompanied by significant amounts of propylene, butanes, butanes, …