Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Theses

Discipline
Institution
Keyword
Publication Year
Publication Type

Articles 841 - 870 of 4970

Full-Text Articles in Entire DC Network

Comparison Of Three Different Woody Plant Species For Their Ability To Utilize Nutritional Elements Supplied In The Form Of Biosolids And Mineral Fertilizers, Fatima El-Telib Hassan Nov 2021

Comparison Of Three Different Woody Plant Species For Their Ability To Utilize Nutritional Elements Supplied In The Form Of Biosolids And Mineral Fertilizers, Fatima El-Telib Hassan

Theses

Crop production systems of the future will need to focus on recycling rather than flow- through of mineral nutrients. Much of the nutrients that leave agricultural systems with crop products eventually end up in household waste and sewage. Returning nutrientrich products from wastewater treatment to agricultural soils must be done in an environmentally sound and culturally acceptable manner. More than 300,000 hectares of forest have been planted in the United Arab Emirates (UAE), consisting mainly of native species, such as Prosopis cineraria (Ghāf) and Vachellia tortilis (Samr). It has been proposed that sewage sludge, the dry residue from wastewater treatment, …


The Effect Of Natural Elicitors And Cold Storage Period On Quality Improvement Of Uae Date Palm Fruits (Phoenix Dactylifera, Cv. Barhi), Fatima Yaaqoub Yousef Al Shaibani Nov 2021

The Effect Of Natural Elicitors And Cold Storage Period On Quality Improvement Of Uae Date Palm Fruits (Phoenix Dactylifera, Cv. Barhi), Fatima Yaaqoub Yousef Al Shaibani

Theses

Date palm is an agricultural crop of economic importance in most Arab countries. Among the different varieties of date palms grown in the United Arab Emirates, the Barhi variety is extremely popular and is often consumed at the bisr stage (first edible stage). However, the major challenge for this fruit at bisr stage is to maintain its quality over a long period after harvest and during marketing. The objective of this study was to evaluate the synergistic effect of preharvest spraying with a natural elicitor, namely chitosan (Ch) 1%, alone and in combination with salicylic acid (SA) 2 mM and …


Health - Promoting Benefits (Antioxidants, Antihypertensive, Antidiabetic) And Probiotic Survivability Of Fermented Camel Milk After In - Vitro Digestion By Infogest 2.0: Comparative Study With Fermented Bovine Milk, Ahlam Faisal Al Hammadi Nov 2021

Health - Promoting Benefits (Antioxidants, Antihypertensive, Antidiabetic) And Probiotic Survivability Of Fermented Camel Milk After In - Vitro Digestion By Infogest 2.0: Comparative Study With Fermented Bovine Milk, Ahlam Faisal Al Hammadi

Theses

This study investigated probiotic survival and biological functionality of the bio accessible fraction of fermented Camel milk (FCM) and fermented Bovine milk (FBM) after in - vitro digestion using INFOGEST 2.0 model. Both Camel and Bovine milk were fermented by starter culture only (SC), probiotic Lactococcus lactis (Pro), and a mixture of SC+Pro followed by storage for 21 days. The obtained water - soluble extract (WSE), excreta, and bio accessible fraction during the in - vitro digestion were assessed for it's health benefits. The probiotic survival, proteolysis rate, antioxidant activities, ability to inhibit Į - Amylase and Į - Glucosidase, …


Response Of Five Chenopodium Quinoa Varieties To Different Salinity Levels, Elevated Co₂ And Uvb, Saif Ali Matar Al Blooshi Nov 2021

Response Of Five Chenopodium Quinoa Varieties To Different Salinity Levels, Elevated Co₂ And Uvb, Saif Ali Matar Al Blooshi

Theses

Ecosystems have been affected by climate changes. Both agriculture and environmental changes are correlated with various features since climate change is the main cause of abiotic and biotic stress which affects crop plants. The climate changes and their severe impact on plant productivity showed great intensities due to the effects of abiotic stress. In the present investigation, five quinoa varieties viz KAUST- 05395/CHFN-68 (V1), KAUST-05398/PI-614889 (V2), KAUST-05397/PI-614885 (V3), KAUST-05403/ICBA-Q3 (V4), and KAUST-05399/PI-614888 (V5) were screened for their salinity stress response by measuring the morphological parameters such as total plant height, fresh and dry weight of shoot and roots. V4 and …


Aqueous Wastewater Treatment With Aluminium Oxide, Silicon Dioxide And Alginite, Anifat Adenike Bankole Nov 2021

Aqueous Wastewater Treatment With Aluminium Oxide, Silicon Dioxide And Alginite, Anifat Adenike Bankole

Theses

Wastewater, regardless of the source, has always found its way into the environment. If not treated it can pose a threat to the life of humans as well as aquatic organisms. In regard to the treatment of wastewater containing remnant organic dyes, the adsorption of these on recyclable sorbent materials such as alginite, alumina, and silica gel was evaluated. The main objective of this thesis is to evaluate the sorption process for dye tainted water specifically stemming from educational and research laboratories. Adsorption studies of the wastewater with sorbent materials were carried out under different experimental conditions. The study investigates …


Studying Neurotoxic Effects Of Three Synthetic Insecticides And Two Herbal Infusions On The Nervous System Of The Fruit Fly Drosophila Melanogaster, Sara Khamis Obaid Hamarain Al Dhaheri Nov 2021

Studying Neurotoxic Effects Of Three Synthetic Insecticides And Two Herbal Infusions On The Nervous System Of The Fruit Fly Drosophila Melanogaster, Sara Khamis Obaid Hamarain Al Dhaheri

Theses

Pesticides applied on plants and animals can reach the human diet once they enter food chains. Insecticides are neurotoxic agents; they have the potential of causing damage to the nervous system in people. The damage could induce or promote neurodegenerative diseases such as the Parkinson’s and Alzheimer's. It is well-documented that the exposure to the insecticide chlorpyrifos (CPF) stimulate the Parkinson disease in humans and experimental animals. Thus, this research project will study effect of three synthetic insecticides pirimicarb, tefluthrin, and CPF on the nervous system of Drosophila melanogaster as a model organism. In addition, the project will evaluate the …


Neurotoxicological Effects Of Chlorpyrifos And Deltamethrin On Dopamine And Acetylcholine Systems In Drosophila Melanogaster, Hala Husam Abdul Baki Nov 2021

Neurotoxicological Effects Of Chlorpyrifos And Deltamethrin On Dopamine And Acetylcholine Systems In Drosophila Melanogaster, Hala Husam Abdul Baki

Theses

Emerging evidence suggests a positive association between pesticide exposure and sporadic Parkinson's disease (PD) development. The molecular mechanisms of PD and other neurodegenerative diseases are not fully understood, which hinders the development of therapeutic agents to cure or prevent the development of such diseases. Drosophila has been widely used as a model organism to study various neurodegenerative diseases and to screen for promising therapeutic agents. The aims of this study were: (i) investigating the toxic effect of 24 hours exposure to chlorpyrifos (CPF) and deltamethrin (DLM) on the dopaminergic system and AChE activity in Drosophila melanogaster; (ii) comparing different methodologies …


Plankton Dynamic At Eastern Arabian Gulf And Sea Of Oman, Muzna Mohammed Husam Saeed Al Junaibi Nov 2021

Plankton Dynamic At Eastern Arabian Gulf And Sea Of Oman, Muzna Mohammed Husam Saeed Al Junaibi

Theses

The present study is part of the collaborative research project entitled “Comparative Analysis and Predictions of Algal Blooms in the Arabian Gulf and the Sea of Oman”, between the United Arab Emirates University and Sultan Qaboos University (Grant # G00002684- 31S321), in which simultaneous and intensive biweekly plankton and water samples were collected from two opposite coastal stations off the Strait of Hormuz with the aim to study plankton dynamics at the Arabian Gulf and the Sea of Oman and the effect of environmental parameters on their community structures during the period from May 2018 until May …


Biological Treatment Of Produced Water Using Algae: A Proof Of Concept, Shibin Hashem Mohammed Nadersha Nov 2021

Biological Treatment Of Produced Water Using Algae: A Proof Of Concept, Shibin Hashem Mohammed Nadersha

Theses

Produced water (PW) is the effluent generated during oil mining and extraction. On average, for every barrel of oil, 4 - 5 barrels of PW are generated worldwide. In UAE, 1.22 billion cubic meters of PW were generated in the year 2017. Proper management of PW is thus very important taking into account the large volumes of it being generated. In addition, PW is considered toxic as it contains various contaminants such as aliphatic and aromatic hydrocarbons, inorganic salts, metals, phenols, radioactive materials, and chemical additives. Disposal of untreated PW into oceans and water bodies can cause adverse effects on …


Central Nervous System: Development, Function, And Applications Of The Glymphatic System (With Additional Neuroscience Topics), Austin Fisher Oct 2021

Central Nervous System: Development, Function, And Applications Of The Glymphatic System (With Additional Neuroscience Topics), Austin Fisher

Theses

The presence of accumulated toxic protein aggregations such as amyloid-β, tau, and α- synuclein are implicated in the development of neurodegenerative diseases such as Alzheimer’s (Soto 2003). Thus, the clearance or removal of these harmful byproducts in healthy brain aging previously represented an unknown system whose functionality is likely to be clinically significant. The finding that directional flow of CSF and interstitial fluid through the brain ensures brain clearance sparked numerous research projects which sought to elaborate on what is now known as the glymphatic system. After initial research revealed the fundamentals of the glymphatic system, scientist J. Iliff defined …


Can Providing Positive Interactions With Snakes Change A Person’S Perception Of Dangerous Wildlife Interactions?, Bethany Walker Oct 2021

Can Providing Positive Interactions With Snakes Change A Person’S Perception Of Dangerous Wildlife Interactions?, Bethany Walker

Theses

Due to a long co-evolutionary history between placental mammals and reptiles, primates demonstrate aversive responses to snakes. In humans, this can result in ophidiophobia, or the fear of snakes which can arise due to cultural backgrounds, traumatic experiences, or fear instilled by others. However, these reptiles fill essential roles in ecosystems. Conservation and outreach efforts are important to help our population understand snakes’ role in our lives and the state’s broader biodiversity. Negative experiences or preconceptions about snakes can make this message hard to share with the public. Educators can help prevent intentional harm to some of these organisms through …


Semantic Segmentation And Change Detection In Satellite Imagery, Raaga Madappa Oct 2021

Semantic Segmentation And Change Detection In Satellite Imagery, Raaga Madappa

Theses

Processing of satellite images using deep learning and computer vision methods is needed for urban planning, crop assessments, disaster management, and rescue and recovery operations. Deep learning methods which are trained on ground-based imagery do not translate well to satellite imagery. In this thesis, we focus on the tasks of semantic segmentation and change detection in satellite imagery. A segmentation framework is presented based on existing waterfall-based modules. The proposed framework, called PyramidWASP, or PyWASP for short, can be used with two modules. PyWASP with the Waterfall Atrous Spatial Pooling (WASP) module investigates the effects of adding a feature pyramid …


Game-Based Learning: Building Competence In Visual Literacy Through Simulation, Carol Record Oct 2021

Game-Based Learning: Building Competence In Visual Literacy Through Simulation, Carol Record

Theses

Game-based learning is an ideal experiential learning framework for introducing the critique process to reduce student anxiety and create competence in visual literacy and self-assessment. Critique, the assessment, and analysis of one’s work is an essential step in any creative process. It is an integral part of art school. However, it can also be a source of high anxiety for new students. This paper discusses the importance of critique, the challenges associated with teaching critique, and the benefits of utilizing game-based learning. Examples of game-based learning solutions are explored, including the development of, and response to, Lumen, a card game …


The Public Poster: An Exploration Of Storytelling In Poster Design, Elizabeth Hiler Oct 2021

The Public Poster: An Exploration Of Storytelling In Poster Design, Elizabeth Hiler

Theses

Research suggests that it is incredibly difficult for a person to change their mind. Confirmation bias and echo chambers are just a few of the reasons people do not give themselves the opportunity to explore new stories, ideas, beliefs. It is now our challenge to connect with people in unconventional ways and explore storytelling in new spaces to give difficult topics more accessibility to public discourse. The Public Protest Poster can be found at the start of most movements for social and political change by creating a simplified statement with a strong graphic for instant impact. Yet, protest posters rely …


Assessment Of Heavy Metals In Sharks From The Arabian Gulf Waters, The United Arab Emirates, Noor Alali Oct 2021

Assessment Of Heavy Metals In Sharks From The Arabian Gulf Waters, The United Arab Emirates, Noor Alali

Theses

Metals occur naturally in the environment however anthropogenic activities have contributed to their increase in the marine ecosystem. As elements have the ability to bioaccumulate, biomagnify and transfer between biological compartments throughout the food web, they pose a great threat to living biota. The characteristics of the Arabian Gulf make it a harsh environment for marine species especially when multiple stressors are acting together. Rhizoprionodon acutus (milk shark) and Carcharhinus sorrah (spot-tail shark) are essential compartments of the Arabian Gulf ecosystem. As they are found up in the food chain and considered a predator species they are under the threat …


The Red Palm Weevil In The Uae: Morphological Diversity And Rnai-Mediated Gene Silencing Of Two Cuticle-Related Genes, Safa Hashem Mohammed Musaed Oct 2021

The Red Palm Weevil In The Uae: Morphological Diversity And Rnai-Mediated Gene Silencing Of Two Cuticle-Related Genes, Safa Hashem Mohammed Musaed

Theses

Red Palm Weevil (RPW), Rhynchophorus ferrugineus (Coleoptera: Curculionidae), threatens palm trees worldwide. A better understanding of this insect can help with designing an adequate management strategy. This study aimed to a better understand the morphological diversity of RPW and examined RNAi-mediated gene silencing of two cuticle-related genes, vestigial (vg) gene, and Laccase (Lac2) gene by injecting the last larval stage with double-stranded RNA (dsRNA). For the morphological diversity study, adults of RPW were collected and classified by their prothoracic spots. Additional morphological characters were measured such as Pronotum Length (PL), Pronotum Width (PW), Elytra Length (EL), Elytra Width (EW), and …


Role Of Limonene In An Experimental Model Of Rotenone Induced Parkinson’S Disease, Lujain Mohamad Bader Eddin Oct 2021

Role Of Limonene In An Experimental Model Of Rotenone Induced Parkinson’S Disease, Lujain Mohamad Bader Eddin

Theses

Parkinson's disease (PD) is one of the prevalent neurodegenerative diseases in elderly population. The symptoms of PD often begin with motor and cognitive impairment that are attributed to the dopaminergic neurons degeneration. Rotenone (ROT) is a naturally derived pesticide that is used in agriculture to control pests. It is a neurotoxin well-established for use in resembling PD symptoms in research. Limonene (LMN) is a plant derived monoterpene extracted from citrus peel with a wide range of therapeutic effects. Due to the shortage in available therapeutic agents that can cure or halt the progressive degeneration of PD, the main aim of …


Sensory Evaluation Of Camel Milk, Reem Amer Al Kaabi Oct 2021

Sensory Evaluation Of Camel Milk, Reem Amer Al Kaabi

Theses

Camel milk is one of the most important sources of nutrients for humans in numerous arid and semiarid environments. Consumer acceptability and sensory analysis are decisive for the commercialization of camel milk. It is essential to understand the sensory qualities of camel milk because of its unfamiliarity and its typical sensory profile, which is different from that of bovine milk. This study aimed to evaluate a trained panel qualitative description of sensory characteristics as well as consumer acceptability and attitude towards pasteurized non-flavoured, flavoured, and camel milk powders. In the consumer acceptability test, samples were evaluated based on acceptability with …


Multivariate Statistical Analysis Applied To The Forensic Analysis Of Synthetic Fibers, Abdulrahman Aljanaahi Sep 2021

Multivariate Statistical Analysis Applied To The Forensic Analysis Of Synthetic Fibers, Abdulrahman Aljanaahi

Theses

Textile fibers obtained from crime scenes can provide trace evidence to help solve criminal cases through forensic science. Examining the samples involves the use of different analytical procedures to determine associations between different fabric fragments. The current study explored multivariate statistical methods applied in synthetic fiber forensic science comparisons. The literature review of the current research identified various multivariate approaches such as Principal Component Analysis (PCA) and Partial Least Square Discriminant Analysis (PLS-DA) to analyze spectroscopic and chromatographic data. The capstone project used Fourier Transform Infrared (FT-IR) Spectroscopy instrumental methods for the analysis of standard synthetic fibers. Afterwards, multivariate data …


Noninvasive Electrocardiographic Imaging (Ecgi) To Guide Catheter Ablation Of Scar-Related Ventricular Tachycardia, Omar Ahmed Gharbia Sep 2021

Noninvasive Electrocardiographic Imaging (Ecgi) To Guide Catheter Ablation Of Scar-Related Ventricular Tachycardia, Omar Ahmed Gharbia

Theses

Scar-related VT is caused by local \textit{short circuits} of electrical propagation formed by slow-conducting channels of surviving tissue within a scar. Catheter ablation treats scar-related VT by destroying the critical channel of surviving tissues. Its efficacy heavily relies on how well the channels critical to the formation of VT circuits can be localized. Unfortunately, in current practice, this relies on invasive catheter mapping that falls short in several critical aspects: up to 90$\%$ of the VT circuits are too short-lived to be mapped, the mapping cannot be done non-invasively prior to the ablation procedure, and the mapping is restricted to …


Impact Of Sodium Dichloroacetate Alone And In Combination Therapies On Lung Tumor Growth And Metastasis, Aya Mudhafar A. Al-Azawi Sep 2021

Impact Of Sodium Dichloroacetate Alone And In Combination Therapies On Lung Tumor Growth And Metastasis, Aya Mudhafar A. Al-Azawi

Theses

Lung cancer is the second most common form of cancer with the highest mortality rate worldwide in 2020 despite the advances in targeted- and immuno-therapies. Metabolic reprogramming has been recognized as an essential emerging cancer hallmark in which altered metabolic pathways represent an attractive therapeutic target. Sodium Dichloroacetate (DCA), a pyruvate dehydrogenase kinase (PDK) inhibitor, effect has been investigated in various tumors. Building on the already published data, this pre-clinical study aims to explore the anticancer potential of DCA in lung cancer alone and in combination with chemo- and targeted therapies using two non-small cell lung cancer (NSCLC) cell lines …


Drug Releasing Hydrogels For Opioid Use Disorder, Kaytlyn M. Crowe Aug 2021

Drug Releasing Hydrogels For Opioid Use Disorder, Kaytlyn M. Crowe

Theses

Ease of access to prescription opioids and the strength of synthetic opioids have contributed to the rise in over use disorders, overdose, and death rates during the opioid epidemic. The current overdose standard of care, rescue NLX (NLX), is a competitive antagonist to the μ-opioid receptor but has a relatively short period of action compared to opioid agonists, especially synthetic agonists. Rises in the abuse of these synthetic and semi-synthetic agents in recent years have shown the weaknesses of rescue NLX, as it can leave overdose patients vulnerable to renarcotization and precipitated withdrawal. To prevent both from occurring, we developed …


A Cost Analysis And Policy Review Of Digestate When Deemed A Waste Product And A Fertilizer., Sarah Chandrika Cannon Aug 2021

A Cost Analysis And Policy Review Of Digestate When Deemed A Waste Product And A Fertilizer., Sarah Chandrika Cannon

Theses

Food waste is a multifaceted issue that has proposed solutions as complex as the problem itself. New York State recently announced a food waste ban, effective January of 2020, that will require large scale food waste producers to manage the waste through alternative methods as opposed to disposal in a landfill. One of those methods is through Anaerobic Digestion, a process in which organic matter chemically reacts with bacteria to produce a biofuel along with an associated byproduct, namely digestate. The biofuel in most cases is used to produce electricity to feed back to the grid acting as a net …


Conservation Of The Ambystoma Jeffersonianum Complex, Morgan Motherwell Aug 2021

Conservation Of The Ambystoma Jeffersonianum Complex, Morgan Motherwell

Theses

The Great Lakes region is home to the diverse genus Ambystoma, including the Blue Spotted Salamander (Ambystoma laterale) and Jefferson’s Salamander (Ambystoma jeffersonianum). These two species are relevant to conservation efforts because of unique hybrid populations. This hybridization creates offspring populations that are morphologically similar to the parental species. The hybrid populations are primarily all female lineages and are known as the Ambystoma jeffersonianum complex. Conservation interest in this hybrid complex stems from the fact that hybrid populations are not taxonomically recognized as separate species and therefore are not protected under the Endangered Species Act. To assess the contribution of …


Assessment And Deployment Of Genetic Tools For North American River Otters (Lontra Canadensis), Kelsey Lawton Aug 2021

Assessment And Deployment Of Genetic Tools For North American River Otters (Lontra Canadensis), Kelsey Lawton

Theses

North American River Otters (Lontra canadensis) once thrived in large numbers in most wetlands of North America. However, due to human pressures such as trapping, habitat loss and pollution, these carnivorous mammals have decreased in numbers significantly in the last 100+ years, becoming extirpated in many traditionally inhabited areas. The use of genetic data from molecular techniques (PCR, DNA sequencing) can guide the identification and management of populations used for relocations to better maintain genetic diversity in both wild and captive otter populations and help inform the Association of Zoos and Aquariums (AZA) breeding programs. Management organizations are concerned with …


1:38, Yuhao Sheng Aug 2021

1:38, Yuhao Sheng

Theses

This thesis support paper demonstrated the entire process of creating this thesis film "1:38," describing how this film completed from a simple inspiration to a finished film project. Besides, this paper also describes how the author's ideas formed from the beginning and his inner struggle during the quarantine period, which inspired the author to create this film. Thirdly, this paper clarifies how the whole film team worked and our considerations about different problems during the film shooting. I believe this paper would be a good reference for the students to shoot their films with a low budget.


Effects Of Wetland Design And Invasive Species Removal On Carbon And Microbial Communities In Restored Wetlands, Benjamin Hamilton Aug 2021

Effects Of Wetland Design And Invasive Species Removal On Carbon And Microbial Communities In Restored Wetlands, Benjamin Hamilton

Theses

Multiple wetland ecosystem services such as carbon sequestration and nutrient removal are influenced by microbial communities and dissolved organic matter (DOM). I examined DOM composition, carbon metabolism, and microbial communities in three created wetlands, which had distinct hydrology, vegetation and antecedent land-use. To study differences between wetlands, porewater and soil were collected from each wetland in spring, summer, and fall of 2018. DOM was analyzed using NMR spectroscopy and fluorescence spectrometry, soil microbial community composition was examined using 16S ribosomal sequencing, and CO2 and CH4 production rates were measured in anaerobic soil incubations. Structural DOM composition varied significantly between the …


Flip: An Interaction Design Project For Helping People To Break Echo Chamber, Rong Zhao Aug 2021

Flip: An Interaction Design Project For Helping People To Break Echo Chamber, Rong Zhao

Theses

Social media constantly instills you with the things you like and the things you are willing to believe in, even disinformation, creating an echo chamber in which users will never have other opinions. People are controlled by algorithms so that social media platforms ensure we only get a single side of every story. The personalization of social media minimizes people's view of the world and causes the division of society. My thesis explores the interaction methods to encourage people to be exposed to multiple perspectives about things by reading the same story from different sources. To solve the problem, I …


Communication Of Feelings, Linge Lin Aug 2021

Communication Of Feelings, Linge Lin

Theses

The making of art should not be isolated from the idea of its audiences who make the artwork complete. However, it might end up as something insincere if one tries to please their audience too much. When an artist initiates a conversation with an audience, they must not be overwhelmed by the idea of appealing to them. I used this principle throughout the process of making my thesis film, Hold Me, which depicts my experience of coming-out to my mother, and our confrontations afterward. The film traces my life trajectory from my childhood until now, and illustrates how I started …


Carbon Soil Amendment For Promotion Of Native Species In Created Emergent Freshwater Wetlands, Taylor E. Williams Aug 2021

Carbon Soil Amendment For Promotion Of Native Species In Created Emergent Freshwater Wetlands, Taylor E. Williams

Theses

Wetlands created or restored to replace natural wetland often fail to achieve functional equivalence and delivery of similar ecosystem services, especially with regard to plant community structure. In these young ecosystems, native emergent plants may not successfully compete with invasive species that are more rapid colonizers and capable of taking advantage of disturbed systems. This susceptibility to invasion and lack of resilience is exacerbated under conditions of high nutrient availability or extreme variations in weather as a result of climate change. Management of invasive plants in wetlands typically involves costly chemical and mechanical control measures, necessitating development of cost-effective and …