Digital Commons Network^™

Photochemistry Of Quinones And Combustion-Derived Particles, Desiree J. Sarmiento

Electronic Theses and Dissertations

Quinones are ubiquitous species that can be produced from the photochemical aging of combustion-derived particles (CDPs). Polycyclic aromatic hydrocarbons (PAHs) are a major component of CDPs and are precursors to quinones and other oxidized products (OPAHs). My work first expanded on the PAH and OPAH photochemistry research of Dr. John Haynes, who showed that anthracene (ANT) oxidizes into 1,4-naphthoquinone (1,4-NAPQ), 1,4-anthraquinone (1,4-ANTQ), and 9,10-anthraquinone (9,10-ANTQ), and of Dr. Heather Runberg, who demonstrated the ability of ANT and these quinones to generate reactive oxygen species (ROS). Then at the Pacific Northwest National Laboratory (PNNL), I was given the opportunity to investigate …

The Role Of Adolescent Depression Heterogeneity And Resilience Resources In Adulthood Cardiometabolic Health And Depressive Symptoms, Samantha R. Scott

Electronic Theses and Dissertations

Depression in adolescence is a major public health problem and is a risk factor for early-onset cardiometabolic disease. Although adolescent depression is a risk factor for poor cardiometabolic health, depression is heterogeneous and associations may differ by sex. Additionally, if risk factors such as depression can predict adulthood cardiometabolic health, resilience factors (e.g., social, school, neighborhood) that are protective for depression may also be protective for physical health, but this is an ongoing area of research. The goals of the current dissertation were to gain a better understanding of what depressive symptom presentations in adolescents are most concerning for adulthood …

A Qualitative Examination Of Homelessness Risk Factors And Housing Histories Of Single Room Occupancy (Sro) Tenants In Chicago, Shadman Syed Saquib

College of Science and Health Theses and Dissertations

Single-Room Occupancy (SRO) housing is among the most affordable private market housing options and serves tenants who often have multiple oppressed identities, including economic marginalization, carceral histories, and disabling conditions. However, SRO buildings are often sold for redevelopment, displacing tenants with few alternative housing options and at risk of homelessness. Research suggests that multiple ecological factors, such as prior housing instability, predict future homelessness, which may be compounded for individuals with oppressed identities. Thus, the current study explores the housing histories and identities of displaced SRO tenants to understand their vulnerability to post-displacement homelessness. Seventeen participants who were displaced from …

Dataset For Cholesterol And Q147e Deamidation Modulates Aa-Crystallin Membrane Binding Elucidating Protective Role Of Lens Membrane Composition Changes With Aging, Preston Hazen, Nawal K. Khadka, Laxman Mainali

Biophysics Research Data

Purpose: αA-Crystallin (αAc) binding with lens membranes increases with age and cataract formation. However, the role of lipids and cholesterol (Chol) in Q147E-αAc membrane binding remains unclear, which we aim to elucidate in this study.

Methods: We have used the electron paramagnetic resonance spin-labeling method to probe the Chol/ 1-palmitoyl-2-oleoylphosphatidylcholine (POPC) and Chol/ sphingomyelin (SM) membranes binding with wild-type (WT) and Q147E-αAc.

Results: Compared to WT-αAc, the Q147E mutant had increased binding to POPC and decreased binding to SM membranes without Chol. Adding 33 mol% Chol to the POPC and SM membranes decreased the binding of WT and, to a …

Design, Manufacturing, And Engineering Design Validation Of A Fetal Activity Monitor, Hector Andres Pena Vega

Undergraduate Honors Theses

Fetal movement monitoring is an important indicator of fetal health, but

current methods often rely on subjective self-reporting or medical equipment that

may not be universally available. The research described in this thesis describes

the design, manufacture, and engineering validation of a wearable fetal activity

monitor based on nanocomposite wide-range strain gauge technology. Embedded

in a wearable maternity band garment, the technology is designed to discreetly

record fetal movements with the eventual goal of providing real-time information

that can assist pregnant women and medical professionals in monitoring patterns

of fetal activity.

The scope of the described research focuses on the …

Intersectional Resistance: German Working-Class Adaptation To Nazi Control, Nyhan O’Sullivan

Lawrence University Honors Projects

Prior to the Nazi seizure of power, the working class in Germany held political power at the local and national level. Once the Nazi state obtained control, they took decisive action and dismantle workers institutions and control the working class. The working class was forced to adapt to these rapidly changing circumstances and push back against the Nazi state in ways dictated largely by the conditions in which workers found themselves. Workers with vastly different experiences, from forced laborers to enthusiastic fascist volunteers experiences the Nazi states contempt for workers and resisted. By examining this resistance and the effects it …

Synthesis Of Anti-Schistosomal Heterocyclic Compounds Targeting Thioredoxin Glutathione Reductase, Alexander Stewart

Lawrence University Honors Projects

chistosomiasis is a deadly and debilitating parasitic disease caused by Schistosoma mansoni which affects 200+ million people annually who come into contact with contaminated water. Currently only one drug (Praziquantel) has been used to treat this disease for almost 50 years, and fear of resistance is growing, thus a new drug and new target is needed. Inhibition of the organism-specific redox defense protein Thioredoxin Glutathione Reductase (TGR) has lead to the death of the worm in vitro, indicating that it would be a good druggable target. Fragment based analysis and x-ray crystallography have returned the outline of a lead compound …

Burned In Berlin – Banned In Boston: Censorship Of Booksellers During The Interwar Period In The U. S. As Compared To Germany, 1919-1939, Aleksandra Jimerson-Mckinnies

Lawrence University Honors Projects

During the twenty-year interwar period from 1919-1939, two vastly different nations faced their own personal wars with the censorship of booksellers. Germany—at first the Weimar Republic, then later the Nazi Regime—underwent such a transformation that Berlin went from one of the literary capitals of the world to the site of the most infamous of censorship crimes: the book burnings. Meanwhile, the United States was a long-standing democratic nation in which freedom of speech was one of its cornerstone tenants. Despite the differences of governments and the scope and scale of the censorship, there were major similarities between the tactics and …

Evolutionary Conservation Of Wiskott-Aldrich Syndrome Protein In Clarthrin-Mediated Endocytosis, Jonah Friedmann

Lawrence University Honors Projects

Clathrin-mediated endocytosis (CME) is a cellular process for internalizing extracellular materials and recycling parts of the plasma membrane into intracellular vesicles. When a threshold of membrane-bound receptors is met at the cell surface, endocytic proteins organize into a conformation that can invaginate the membrane and separate a vesicle into the cytosol. Our current model for understanding CME has been derived from studies in Saccharomyces cerevisiae. Previous research has led to a model for how Las17, a homolog of Wiskott Aldrich Syndrome Protein (WASP), contributes to CME. WASP proteins are critical actin nucleators involved in multiple processes. In S. cerevisiae, Las17 …

4th Sbs International Conference 2025: Transforming Business For People And Planet, School Of Business Studies (Sbs)

Conference Proceedings

The IBA-SBS International Conference (IBA-SBSIC) brings together scholars, professionals, and policymakers from around the world, providing a platform for learning, collaboration, and cutting-edge research. As we enter the 4th edition in 2025, the conference embraces the theme "Transforming Business for People and Planet."

The business landscape is evolving rapidly, with companies increasingly held accountable for their environmental footprint, ethical responsibilities, and social impact. Governments, regulators, and consumers now demand responsible business practices that align with sustainability and long-term financial resilience. Sustainability is no longer a choice—it is a necessity. Global movements toward climate action, social equity, and responsible governance are …

Study Of Agn Jet And Possible Connection Among Different Agn Classes, Shahjahan Iqbal

University Departments

No abstract provided.

Composite Magnetic Monopoles, Moreshwar Pathak

University Departments

No abstract provided.

Spin Precession In Magnetized Kerr Spacetime, Karthik Krishnamurthy Iyer

University Departments

No abstract provided.

Interacting Galaxy Clusters As A Probe To Cosmic Filaments, Shreya R. Kamath

University Departments

No abstract provided.

Photometric And Spectroscopic Properties Of Hydrogen-Rich Supernovae, Chaitrika B. M

University Departments

No abstract provided.

Abstract 2587 Recombinant Expression And Purification Of A. Vinelandii Cown In E. Coli, Julie Takei, Cedric P. Owens, Katie Sanders, Neeraja Gajendran

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

The goal of this project is to study the protein CowN in the diazotroph Azotobacter vinelandii (Av) in comparison to CowN in Gluconacetobacter diazotrophicus (Gd). Nitrogenase is an enzyme that catalyzes the reduction of nitrogen gas into ammonia in diazotrophic bacteria. In many diazotrophs, the protein CowN prevents nitrogenase inhibition from the environmental gas carbon monoxide (CO). Previous work studied CowN in the diazotroph G. diazotrophicus. In G. diazotrophicus, CowN binds to nitrogenase and weakens CO binding to its active site. The mechanism of CowN has only been investigated in G. diazotrophicus. Thus, we are interested in determining if CowN's …

Status Of Persistent Organic Pollutant Of Brominated Flame Retardant Hbcd In Daily Diet And Its Potential Health Risks, Zhao Zirui, Ji Hainan, Zhao Chan, Shen Guolin, Zhang Mengling

Food and Machinery

Hexabromocyclododecane (HBCD ) is a brominated flame retardant widely used in flame retardant for various industrial and consumer products.Due to its high biotoxicity,bioaccumulation,pollution persistence,and long -range transport capacity,HBCD has been included in the Stockholm Convention list of persistent organic pollutants (POPs ) and is being phased out globally.In this paper,the contamination of HBCD,additive brominated flame retardants,in daily diet and the characteristics of HBCD absorption and metabolism in the body are briefly described.Then,the evaluation of HBCD exposure toxicity by bioinformatics,in vitro primary cell models,and cell line models are reviewed.Subsequently,the effects of HBCD intervention on the toxicology of zebrafish models,mouse models,and rat …

Construction And Application Of Magnetic Core-Shell Structure So42-/Fe3O4@Al2O3-Tio2 Catalyst, Huang Yufei, Zheng Jianxian

Food and Machinery

［Objective］ To develop a magnetic solid superacid catalyst for the synthesis of ascorbyl palmitate via an SO₄^2-/Fe₃O₄@Al₂O₃-TiO₂ system,addressing the separation difficulties,substrate oxidation,and pollution issues associated with the traditional concentrated sulfuric acid method.［Methods］ SO₄^2-/Fe₃O₄@Al₂O₃-TiO₂ is prepared by a co -precipitation -sol-gel method.The catalyst is characterized by the Hammett indicator method,NH3-TPD,and VSM.Single -factor experiments are used to verify the catalytic activity of the catalyst for ascorbyl palmitate synthesis and optimize reaction parameters.The stability of the catalyst is further …

Exploration On Hypoglycemic Mechanism Of Components In Guangdong Finger Citron Based On Network Pharmacology And Molecular Docking, Ma Wencong, Wu Yuxiao, Zhong Cheng, Zhou Aimei

Food and Machinery

［Objective］ To study the potential targets of hypoglycemic effects of components in Guangdong Finger Citron (GFC ) based on network pharmacology.［Methods］ Genes associated with type 2 diabetes mellitus (T2DM) and hyperglycemia are screened using the TTD,DrugBank,OMIM,and DisGeNET databases.Active components of GFC are collected from literature,and potential targets are predicted using the Swiss database.Based on this,key proteins are then identified through the STRING database,and a "disease -active -component -target -pathway" network was constructed using Cytoscape 3.7.1.Functional annotation is further carried out by performing gene ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG ) pathway enrichment analyses through the …

Aging Acceleration Effect Of Electron Beam Irradiation On Luzhou-Flavor Baijiu Using Electronic Nose And Electronic Tongue, Zheng Qi, Tian Wenhui, Yue Ling, Yan Weiqiang, Chen Zhijun, Zhang Yanyan, Kong Qiulian

Food and Machinery

［Objective］ To clarify the aging acceleration effect of electron beam irradiation on Luzhou -flavor Baijiu.［Methods］ The effects of 0~8 kGy electron beam irradiation on the aroma and taste of newly produced Luzhou -flavor Baijiu were studied using electronic nose and electronic tongue technologies.Aged Baijiu (1~3 years ) served as a control to analyze the changes in aroma and taste characteristics after treatment with the optimal irradiation dose.［Results］ Principal component analysis (PCA ) of the electronic nose and electronic tongue revealed clear separation of newly produced Luzhou -flavor Baijiu after irradiation with various doses of electron beams,indicating significant differences in aroma …

Stability And Sensory Evaluation Of Capsaicin Emulsion Based On Oil Unsaturation Degrees, Fan Xinying, Su Wei, Wang Xinmiao, Chen Jianshe, Hu Xiaoxue

Food and Machinery

［Objective］ To investigate the effect of oil phase unsaturation degree on the performance of capsaicin emulsion to optimize its application efficacy in food systems.［Methods］ Flaxseed oil (α-linolenic acid ),sunflower oil (linoleic acid ),and camellia oil (oleic acid ) are selected to construct the emulsion systems.The particle size distribution,zeta potential,microstructure,in vitro digestion stability,and sensory characteristics are systematically analyzed.［Results］ The camellia oil emulsion exhibits the largest value in average particle size of specific surface area,while the flaxseed oil emulsion demonstrates the smallest particle size and significantly higher absolute zeta potential values (P<0.01).Its compact interfacial structure maintains smaller particle sizes throughout the digestion process (P<0.01),ensuring the optimal protection of capsaicin.According to sensory evaluation,the flaxseed oil emulsion has the strongest spicy perception,potentially attributed to its high unsaturation degree.［Conclusion］ The findings demonstrated that the stability of capsaicin emulsions correlates with the unsaturation degree of the oil phase.Highly unsaturated fatty acids enhance emulsion stability by forming viscoelastic interfacial films.Flaxseed oil,with the highest unsaturation degree,produces emulsion with the smallest particle size,most uniform distribution,and best emulsion stability and pungency intensity.

Uncertainty Evaluation For Cs- 137 In Food By Low-Background Α/Β Counter, Sun Gongming, Li Guanchao, Huang Lingyu, Li Qiaoqin, Li Meili

Food and Machinery

［Objective］ To improve the measurement accuracy of cesium -137 (Cs-137) content in food using low -background α/β measuring instruments.［Methods］ An uncertainty analysis model for measuring Cs -137 in food was established based on the second method in GB 14883.10-2016.The uncertainty components affecting the detection process were analyzed,the sources of uncertainty were explored,and the uncertainty was evaluated.［Results］ Through uncertainty analysis introduced by sample measurement,supervised source measurement,cesium recovery rate calibration,sample sampling,sample ash -to-fresh ratio,standard source calibration supervised source,and self -absorption coefficient calibration,the activity concentration of Cs -137 in food determined by the ammonium phosphomolybdate method was 1.44 Bq/kg,with an expanded uncertainty of …

Determination Of Six Human Milk Oligosaccharides In Infant Formula Milk Powder By Ion Chromatography, Zhang Jiaqi, Li Yunxuan, Wang Lulu, Zhang Shuifeng, Pan Xiangjie, Shi Yuanxu, Que Liming

Food and Machinery

［Objective］ To establish an ion chromatography method for the simultaneous determination of six human milk oligosaccharides (HMOs ) in infant formula powder.［Methods］ The samples were enzymatically hydrolyzed using fructanase.Gradient elution was performed with a mobile phase consisting of water,0.5 mol/L sodium hydroxide,and 0.3 mol/L sodium acetate.Separation was carried out on a Thermo Fisher CarboPac ™ PA1 Analytical Column,and detection was performed using ion chromatography with pulsed amperometric detection.［Results］ In milk powder,2'-fucosyllactose (2'-FL),3-fucosyllactose (3-FL),and lacto -N-tetraose (LNT ) showed good linearity within the range of 1~100 mg/L,while lacto -N-neotetraose (LNnT ),3'-sialyllactose (3'-SL),and 6'-sialyllactose (6'-SL) exhibited good linearity in the range of …

Milk Adulteration Detection Method Based On Raman Spectroscopy And Spatiotemporal Attention Networks, Liu Yanmei, Zhao Baofeng, Ma Huilian

Food and Machinery

［Objective］ To enhance the milk adulteration detection accuracy.［Methods］ This study proposes a milk adulteration detection method by integrating Raman spectroscopy with a spatiotemporal attention network (STAN ).In the method,Raman spectroscopy is employed to extract molecular features,while STAN is applied to capture both temporal and spatial features,with a self -attention mechanism for further emphasizing critical information.［Results］ Compared with existing methods,the experimental method increases milk adulteration detection accuracy by an average of 4.5%,precision by about 5.8%,recall by 4.9%,and F1 score by 5.4%.［Conclusion］ The experimental method achieves high accuracy and robustness in milk adulteration detection,with strong potential for real -time detection and broad …

Design And Test Of Flat Grinding Type Germ-Remained Rice Milling Machine, Ren Hongchen, Xu Aidi, Sun Binghua, Jin Dehai, Li Jing, Sun Daming, Yan Jingfeng

Food and Machinery

［Objective］ To address the challenges of retaining the germ in rice with remained germ,balancing nutrition,sensory qualities,and palatability.［Methods］ A technical design proposal for a flat grinding type germ -remained rice milling machine is introduced,which combines active grinding with a flat grinding belt and passive grinding with a flexible blade group.The milling process involves rolling and grinding the rice grains on a flat surface to achieve precise,layer -by-layer grinding.The approach employs multiple flexible processing stages combined with appropriate grinding to ensure a high germ -remained rate and good whiteness of the rice.Northeast China -produced japonica rice is used as the test material,with …

Effect Of Electric Steamer Steaming Parameters On The Cooking Quality Of Eggplant, Zhao Wenyu, Xu Yanshun, Li Yujing, Fang Kun, Yao Qing, He Xiaoyan

Food and Machinery

［Objective］ To evaluate the cooking quality of food based on its color characteristics.［Methods］ Using heating curves,color measurements,and anthocyanin content as evaluation indexes,the effect of steaming power,anaerobic environment,surface temperature change of eggplant,and steaming volume on the color of eggplant was investigated.［Results］ Eggplants steamed in a steamer pot had significantly better color compared to those steamed in a steam oven.The steaming power,volume,anaerobic environment,and surface temperature of the eggplant all affected its color and anthocyanin loss rate.As the steaming power increased and the steaming volume decreased,the anthocyanin loss rate decreased.The lowest anthocyanin loss rate of 44.27% occurred when the steaming power was 2 …

Automatic Grading Method Of Yellow Peaches On Food Production Line Based On Improved Yolov 11 And Gwo-Elm, Peng Yongjie, Zhao Liangjun, Long Xuming

Food and Machinery

［Objective］ To improve the accuracy and efficiency of the automatic grading method for yellow peaches on the food production line ［Methods］ Based on the yellow peach automatic grading system (machine vision and hyperspectral technology ),a new method for automatic detection of yellow peach quality is proposed,which integrates an improved YOLOv 11 and an improved extreme learning machine (ELM ).External quality images are captured by a CMOS sensor camera,and defects are identified using the improved YOLOv 11 model.The external quality is determined by the fruit shape index and color.Internal quality is detected using a hyperspectral instrument,and after feature selection,the data is …

Image Recognition Algorithm For Pork Freshness Based On Yolov 8n, Wang Lian, Liu Jun, Pi Jie, Wang Daoying

Food and Machinery

［Objective］ To realize precise,swift,and non -invasive detection of pork freshness in large -scale cold meat industry chains based on computer vision technology.［Methods］ An image recognition algorithm for pork freshness is proposed based on YOLOv 8n.Various data augmentation methods are employed to enhance the pork feature extraction from images.The transfer learning experiment method is utilized,an appropriate optimizer is selected,and the training weights of the model are improved for higher accuracy in the final identification.Based on the YOLOv 8n image recognition algorithm,the improved YOLOv 8n-cls model is developed by data augmentation and optimizer improvement for the algorithm.［Results］ After transfer learning and improving …

Effects Of Repeated Freezing-Thawing On Physicochemical Properties And Quality Of Freshwater Silver Carp Bladder, Huang Darong, Feng Rui, Zhong Biluan, Tian Jianxin, Liang Jiehua, Zhang Yu

Food and Machinery

［Objective］ To investigate the effects of different freezing and thawing cycles on the physicochemical properties and quality of silver carp fish bladder.［Methods］ Fresh silver carp fish bladder was used as the research material.The trends of water retention,color difference,textural properties,basic nutrient content,and microstructure of the fish bladder were analyzed under different freezing -thawing cycles.［Results］ As the number of freeze -thaw cycles increased,the cooking swelling rate,brightness value,yellowness value,hardness,cohesion,adhesiveness,collagen content,and total protein content of the silver carp fish bladder all decreased significantly (P<0.05),with reductions of 45.52%,10.90%,48.99%,47.45%,13.56%,58.04%,10.54%,and 4.57%,respectively.The decreases in moisture,fat,and ash content were relatively low.The thawing loss rate and color redness value both increased significantly (P<0.05),by 4.80% and 140.72%,respectively.The microstructure of the silver carp fish bladder gradually deteriorated and broke down during the repeated freezing -thawing process.［Conclusion］ Based on the quality deterioration during the comprehensive freezing -thawing process,limiting the freezing -thawing cycles to no more than five can effectively preserve the characteristics and quality of the silver carp fish bladder.

In Vitro Digestion Characteristics Of Steam-Exploded Oats And Their Effects On Obesity Induced By High-Fat Diet In Mice, Wang Jing, Kuang Chuyu, Xia Zhihui, Cai Jiaru, Wang Xufeng, Luo Kaiyun

Food and Machinery

［Objective］ To investigate the effects of steam explosion pretreatment on the microstructure of oats,the content of β-glucan,the digestion characteristics of starch,and its effect on obesity in mice fed a high -fat diet.［Methods］ The effects of steam explosion treatment under different pressures (0.3,0.5 MPa ) and time (30,60,90 s) on the microstructure of oats and the composition of β-glucan are investigated,and the obesity inhibitory effect of steam -exploded oats in a simulated high -fat diet environment is studied.［Results］ Steam explosion can destroy the ordered structure of the oat cell wall,increase the content of slowly digestible starch,the content and dissolution rate of …