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Articles 1 - 30 of 190915

Full-Text Articles in Life Sciences

Growth, Lipid Production And Biodiesel Potential Of Chromulina Freiburgensis Dofl., An Acidophilic Chrysophyte Isolated From Berkeley Pit Lake, June E. Mohler Mitman Mar 2109

Growth, Lipid Production And Biodiesel Potential Of Chromulina Freiburgensis Dofl., An Acidophilic Chrysophyte Isolated From Berkeley Pit Lake, June E. Mohler Mitman

Graduate Theses & Non-Theses

Microalgae remain a promising, but underdeveloped source of lipids for sustainable biodiesel. Some of the obstacles to cost-effective commercial-scale production have been culture contamination and expensive harvest methods. A chrysophyte isolated from Berkeley Pit Lake and identified as Chromulina freiburgensis, was found to grow rapidly in a pH 2.5 liquid medium and to amass numerous intracellular lipid bodies. This research addresses the scarcity of published knowledge on the topic of chrysophyte species as potential lipid sources for biodiesel. It investigates how growth phase, culture conditions, and harvest timing influence the quantity and composition of lipids produced by this alga ...


Recent Decline Of Lowland Populations Of The Western Gray Squirrel In The Los Angeles Area Of Southern California, Daniel S. Cooper, Alan Muchlinski Jul 2105

Recent Decline Of Lowland Populations Of The Western Gray Squirrel In The Los Angeles Area Of Southern California, Daniel S. Cooper, Alan Muchlinski

Bulletin of the Southern California Academy of Sciences

We provide an overview of the distribution of lowland and otherwise isolated populations of the western gray squirrel (Sciurus griseus) in the Los Angeles area of southern California, an area that has experienced a recent and ongoing invasion by the non-native eastern fox squirrel (Sciurus niger), an urban-adapted species introduced a century ago. Away from its strongholds in the western Santa Monica Mountains, San Gabriel Mountains, and Santa Ana Mountains, the western gray squirrel is resident locally in both the Santa Susana and the Verdugo Mountains, in Griffith Park, in low hills at the eastern periphery of the San Gabriel ...


Effect Of External Energy On The Atomic, Crystalline, And Powder Characteristics Of Antimony And Bismuth Powders, Mahendra Kumar Trivedi Sep 2099

Effect Of External Energy On The Atomic, Crystalline, And Powder Characteristics Of Antimony And Bismuth Powders, Mahendra Kumar Trivedi

Mahendra Kumar Trivedi

Next to atoms and molecules the powders are the smallest state of matter available in high purities and large quantities. The effect of any external energy on the shape, morphology and structure can thus be studied with relative ease. The present investigation deals with the effect of a non-contact external energy on the powders of antimony and bismuth. The characteristics of powders treated by external energy are compared with the as received powders (control). The average particle sizes, d50 and d99, the sizes below which 99% of the particles are present showed significant increase and decrease indicating that the energy ...


Titus Thesis Figures.Docx, Titus Hou May 2020

Titus Thesis Figures.Docx, Titus Hou

Titus Hou

No abstract provided.


Titus Thesis.Docx, Titus Hou May 2020

Titus Thesis.Docx, Titus Hou

Titus Hou

No abstract provided.


Effects Of Slope Upon Hind Limb Kinematics In Chukar Partridge (Alectoris Chukar), Anna T. Kenney Jan 2020

Effects Of Slope Upon Hind Limb Kinematics In Chukar Partridge (Alectoris Chukar), Anna T. Kenney

Undergraduate Theses and Professional Papers

Ground dwelling birds must scale all kinds of complex terrain in order to survive in their natural environments. For instance, Alectoris chukar live on steep hillsides with slopes of up to 60° or 172.3% slope. We undertook the present study to improve understanding of how birds successfully traverse such complex terrain. Using a high speed camera, we analyzed the hind limb kinematics of chukars during normal locomotion on a 10° and 35° incline, decline, and level slope. We compared the data collected from the video recordings, which we had used to identify and digitize the bony landmarks, between all ...


Oil Preference In Ants And Arthropod Diversity In Urban Environments, Itzel Guzman-Hernandez Dec 2019

Oil Preference In Ants And Arthropod Diversity In Urban Environments, Itzel Guzman-Hernandez

Honors Theses

The success of certain ant species in urban areas is largely unknown. Available food in the environment could affect the composition of ants in urban areas due to a possible relationship between ant physiology and diet. I tested the oil preference of ants as a function of available arthropod prey in urban environments. I hypothesized that as arthropod diversity decreased, ant abundance at oil baits would decrease. Oil is an important nutrient that can affect ant body functions and activities. Ant foraging activities have been found to be affected by lipid depletion. A food source where ants can obtain oil ...


Ulnar Collateral Ligament Reconstruction With Traditional Docking Compared To Novel Surgical Techniques, Kayley D. Guy, Brendon P. Mcdermott, Kaitlin Gallagher, Tyrone Washington Dec 2019

Ulnar Collateral Ligament Reconstruction With Traditional Docking Compared To Novel Surgical Techniques, Kayley D. Guy, Brendon P. Mcdermott, Kaitlin Gallagher, Tyrone Washington

Health, Human Performance and Recreation Undergraduate Honors Theses

Background: Ulnar Collateral Ligament Reconstruction (UCLR) is a surgical procedure on one of the main ligaments that provides normal stability for the elbow joint against excessive valgus stress. Damage to this ligament is common in athletes performing overhead throwing activities, primarily baseball players, due to excessive valgus stress during the throwing motion. The most common form of treatment for this type of injury is reconstructive surgery of the ligament, especially if athletes wish to return to sport participation. This type of surgery is extremely invasive and requires extensive post-operative rehabilitation in order to facilitate return to play. To date, many ...


Canavalia And Dolichos Extracts For Sustainable Pest Biocontrol And Plant Nutrition Improvement In El Salvador, Carlos Martinez Oct 2019

Canavalia And Dolichos Extracts For Sustainable Pest Biocontrol And Plant Nutrition Improvement In El Salvador, Carlos Martinez

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Botanical repellents and pesticides are now being rediscovered as new tools for integrated pest management in order to reduce the use of toxic chemicals in crop production. Canavalia gladiata and Dolichos lablab are two Fabaceae very well adapted to farmlands of El Salvador, effective as living barriers and mostly as cover crops, however, they are not yet very well disseminated. This document describes the potential for using the liquid extracts and the dry flour of raw seeds of those plants for economic benefit and practical convenience for pest management in Salvadorian agriculture under field conditions. Seed extracts were useful when ...


Testimoni Manfaat Minyak Bulus Untuk Wajah Memutihkan Dengan Harga Yang Murah, Ripan Maki Oct 2019

Testimoni Manfaat Minyak Bulus Untuk Wajah Memutihkan Dengan Harga Yang Murah, Ripan Maki

ripan maki

Testimoni manfaat minyak bulus untuk wajah memutihkan dengan harga yang murah.

Minyak bulus adalah ramuan atau obat tradisional ini terbuat dari hewan bulus khusus di kalimantan yang sudah di olah sedemikian rupa hingga menghasilkan berbentuk minyak. Kandungan yang ada berupa vitamin E yang sangat banyak khasiat manfaatnya bisa untuk perawatan kulit.

Pembuatan minyak bulus sendiri ada bermacam-macam cara namun yang terbaik adalah di oleh dengan cara di keringkan atau di jemur dibawah cahaya matahari. Lemak lemak akan meleleh karena panas hingga cair.
Karena sangat terkenal nya minyak bulus sering di cari untuk merawat kesehatan kulit. Harganya yang terjangkau dan aman ...


Oscillation In Mathematical Epidemiology, Meredith Greer Oct 2019

Oscillation In Mathematical Epidemiology, Meredith Greer

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Fall Frost Tolerances Photo Fact Sheet (2019), Carolyn J. Demoranville Oct 2019

Fall Frost Tolerances Photo Fact Sheet (2019), Carolyn J. Demoranville

Cranberry Station Fact Sheets

No abstract provided.


Identifying Consumer Perceptions Of Fresh-Market Blackberries, Aubrey Dunteman Aug 2019

Identifying Consumer Perceptions Of Fresh-Market Blackberries, Aubrey Dunteman

Food Science Undergraduate Honors Theses

Blackberries are grown worldwide for commercial fresh markets, but there is limited information on consumer perceptions of this fruit. In this study, physiochemical and consumer sensory attributes of three Arkansas-grown fresh-market blackberry genotypes were evaluated and consumer perceptions of fresh-market blackberries were also investigated though an online survey. Two cultivars (Natchez and Ouachita) and one advanced selection (A-2418) were evaluated for compositional and nutraceutical analysis and consumer sensory analysis. Natchez had the highest berry weight, length, drupelets and pyrenes/berry, and pyrene weight/berry. Ouachita had the highest soluble solids content (11.9%), pH (3.18) and soluble solids/titratable ...


Barriers, Roles, And Information Source Preferences For Utilizing Agricultural Science Projects Among Utah 4-H Extension Professionals, Aleigh Aurin Aug 2019

Barriers, Roles, And Information Source Preferences For Utilizing Agricultural Science Projects Among Utah 4-H Extension Professionals, Aleigh Aurin

All Graduate Theses and Dissertations

Agriscience is the growing study of biotechnology, business, and economics within the agriculture industry. Through 4-H, youth can experience hands on learning through different program areas. The purpose of this study was to identify the barriers, roles, and how Utah 4-H personnel preferred to learn about new programs. The study showed time and available volunteers were a barrier for 4-H Extension personnel to implement Agriscience projects. Other results included internet and workshops as the top choices for training programs. The Extension personnel agreed it was their job to involve and educate youth. Yet, need training in how to integrate Robotics ...


Molecular Phylogeny Of The Pectinoidea (Bivalvia) Indicates Propeamussiidae To Be A Non-Monophyletic Family With One Clade Sister To The Scallops (Pectinidae), G. Dalton Smedley, Jorge A. Audino, Courtney Grula, Anita Porath-Krause, Autum N. Pairett, Alvin Alejandrino, Latayshia Lacey, Felicity Masters, Peter F. Duncan, Ellen E. Strong, Jeanne M. Serb Aug 2019

Molecular Phylogeny Of The Pectinoidea (Bivalvia) Indicates Propeamussiidae To Be A Non-Monophyletic Family With One Clade Sister To The Scallops (Pectinidae), G. Dalton Smedley, Jorge A. Audino, Courtney Grula, Anita Porath-Krause, Autum N. Pairett, Alvin Alejandrino, Latayshia Lacey, Felicity Masters, Peter F. Duncan, Ellen E. Strong, Jeanne M. Serb

Ecology, Evolution and Organismal Biology Publications

Scallops (Pectinidae) are one of the most diverse families of bivalves and have been a model system in evolutionary biology. However, in order to understand phenotypic evolution, the Pectinidae needs to be placed in a deeper phylogenetic framework within the superfamily Pectinoidea. We reconstructed a molecular phylogeny for 60 species from four of the five extant families within the Pectinoidea using a five gene dataset (12S, 16S, 18S, 28S rRNAs and histone H3). Our analyses give consistent support for the non-monophyly of the Propeamussiidae, with a subset of species as the sister group to the Pectinidae, the Propeamussiidae type species ...


Using Tree-Ring Growth And Stable Isotopes To Explore Ponderosa Pine Ecophysiological Responses To Climate Variability And The 2012-2015 California Drought, Rachel M. Keen Aug 2019

Using Tree-Ring Growth And Stable Isotopes To Explore Ponderosa Pine Ecophysiological Responses To Climate Variability And The 2012-2015 California Drought, Rachel M. Keen

All Graduate Theses and Dissertations

Climate warming in recent decades has resulted in more frequent and severe drought events in the western United States. These changes are projected to continue, making it exceedingly important to understand how forests respond to severe drought stress, and how we can manage these forests to reduce mortality during future events. The 2012-2015 California drought is a recent example of a severe, multi-year drought that was coupled with an epidemic-scale outbreak of western pine beetle, killing nearly 90% of ponderosa pines in the central and southern Sierra Nevadas. In the first portion of this study, we compared pairs of surviving ...


Quantifying The Predictability Of Evolution At The Genomic Level In Lycaeides Butterflies, Samridhi Chaturvedi Aug 2019

Quantifying The Predictability Of Evolution At The Genomic Level In Lycaeides Butterflies, Samridhi Chaturvedi

All Graduate Theses and Dissertations

Stephen Jay Gould, a great scientist and evolutionary biologists, suggested that if we could replay the tape of life, we would not have observed similar course of events because evolution is stochastic and if affected by several events. Since then, the possibility that evolution is repeatable or predictable has been debated. Studies using large-scale evolution experiments, long-term data for individual populations, and controlled experiments in nature, have demonstrated phenotypic and genetic convergence in several taxa. These studies suggest that despite some randomness, predictable evolutionary patterns can emerge on a large temporal and spatial scale. However, a few cases also exist ...


Linkage Of Climate Diagnostics In Predictions For Crop Production: Cold Impacts In Taiwan And Thailand, Parichart Promchote Aug 2019

Linkage Of Climate Diagnostics In Predictions For Crop Production: Cold Impacts In Taiwan And Thailand, Parichart Promchote

All Graduate Theses and Dissertations

This research presents three case studies of low temperature anomalies that occurred during the winter–spring seasons and their influence on extreme events and crop production. We investigate causes and effects of each climate event and developed prediction methods for crops based on the climate diagnostic information. The first study diagnosed the driven environmental-factors, including climate pattern, climate change, soils moisture, and sea level height, associated with the 2011 great flood in Thailand and resulting total crop loss. The second study investigated climate circulation and indices that contributed to wet-and-cold (WC) events leading to significant crop damage in Taiwan. We ...


Twenty-First Century Skills: A Needs Assessment Of School-Based Agricultural Education Teachers, Kisia J. Weeks Aug 2019

Twenty-First Century Skills: A Needs Assessment Of School-Based Agricultural Education Teachers, Kisia J. Weeks

All Graduate Theses and Dissertations

Preparing students to be career and work ready is a concern of educators and schools nationwide. Twenty-first century skills prepare students to enter the workforce or higher education with the ability to think critically and creatively, collaborate with others, take the initiative when approached with a task, and use technology to its fullest potential. If students are not learning the skills needed for success, it is because educators and schools are not teaching them. When students possess these skills, they are prepared to work in teams, think critically and creatively about a problem, display leadership and social skills, and communicate ...


Eared Grebe Nesting Ecology And Chronology Along The Great Salt Lake, Utah, Leah M. Delahoussaye Aug 2019

Eared Grebe Nesting Ecology And Chronology Along The Great Salt Lake, Utah, Leah M. Delahoussaye

All Graduate Theses and Dissertations

Eared Grebes (Podiceps nigricollis) are migratory birds that build their nests over water and in large groups called colonies. Their typical breeding range is in central southern Canada and northern United States; however, a previously uncertain number of Eared Grebes (grebes) also nest around the Great Salt Lake (GSL), Utah, at the southern edge of their breeding range. Little is known about the habitat requirements for grebe nesting colonies at such low latitudes and if they are different from colonies found elsewhere. My objectives for this research were to determine the status of the grebe nesting population as well as ...


Electronic Transmutation: An Aid For The Rational Design Of New Chemical Materials Using The Knowledge Of Bonding And Structure Of Neighboring Elements, Katie A. Lundell Aug 2019

Electronic Transmutation: An Aid For The Rational Design Of New Chemical Materials Using The Knowledge Of Bonding And Structure Of Neighboring Elements, Katie A. Lundell

All Graduate Theses and Dissertations

Everything in the universe is made up of elements from the periodic table. Each element has its own role that it plays in the formation of things it makes up. For instance, pencil lead is graphite. A series of honeycomb-like structures made up of carbon stacked on top of one another. Carbon’s neighbor to the left, boron doesn’t like to form such stacked honeycomb-like structures. But, what if there was a way to make boron act like carbon so it did like to form such structures? That question is the basis of the electronic transmutation concept presented in ...


Genetic Mapping Of Grass Monoculture And Grass-Legume Mixture Compatibility Qtls In Intermediate Wheatgrass, John Mortenson Aug 2019

Genetic Mapping Of Grass Monoculture And Grass-Legume Mixture Compatibility Qtls In Intermediate Wheatgrass, John Mortenson

All Graduate Theses and Dissertations

Due to increased environmental stewardship and fertilizer prices, there is increased interest in using legume mixes in perennial croplands. The objective of this study was to compare quantitative genetic parameters and quantitative trait loci (QTLs) associated with intermediate wheatgrass (Thinopyrum intermedium) when grown in 1) a non-competitive spaced environment, 2) a polyculture with alfalfa (Medicago sativa), and 3) a monoculture with crested wheatgrass (Agropyron desertorum). Traits evaluated include plant growth characteristics (Zadok’s maturity, height, and tiller count), biomass, and forage nutritive value (CP, NDF, ADF, ADL, IVTD, NDFD, NFC, ME, RFQ). A linkage map comprised of 3568 single nucleotide ...


Evaluating Machine Learning Performance In Predicting Injury Severity In Agribusiness Industries, Fatemeh Davoudi Kakhki, Steven A. Freeman, Gretchen A. Mosher Aug 2019

Evaluating Machine Learning Performance In Predicting Injury Severity In Agribusiness Industries, Fatemeh Davoudi Kakhki, Steven A. Freeman, Gretchen A. Mosher

Agricultural and Biosystems Engineering Publications

Although machine learning methods have been used as an outcome prediction tool in many fields, their utilization in predicting incident outcome in occupational safety is relatively new. This study tests the performance of machine learning techniques in modeling and predicting occupational incidents severity with respect to accessible information of injured workers in agribusiness industries using workers’ compensation claims. More than 33,000 incidents within agribusiness industries in the Midwest of the United States for 2008–2016 were analyzed. The total cost of incidents was extracted and classified from workers’ compensation claims. Supervised machine learning algorithms for classification (support vector machines ...


Ưu Điểm Của Lắp Điện Mặt Trời Hòa Lưới Áp Mái Tại Võ Gia Solar, Võ Gia Solar Jul 2019

Ưu Điểm Của Lắp Điện Mặt Trời Hòa Lưới Áp Mái Tại Võ Gia Solar, Võ Gia Solar

Võ Gia Solar


Hexavalent Chromium-Induced Cytotoxicity And Mutagenicity: A Study Of Protection By Ascorbic Acid And Epigallocatechin Gallate, Timothy P. Mayotte Jul 2019

Hexavalent Chromium-Induced Cytotoxicity And Mutagenicity: A Study Of Protection By Ascorbic Acid And Epigallocatechin Gallate, Timothy P. Mayotte

Honors Program Projects

Hexavalent chromium, or Cr(VI), is a potent oxidizer and known carcinogen, that is found at varying levels in the water sources of more than 200 million Americans. However, the exact mechanism of carcinogenicity remains unknown, and though the government currently regulates total chromium levels, they have yet to determine a permissible exposure limit for Cr(VI). Moreover, there is currently no preventative treatment for Cr(VI). Because of Cr(VI)’s strong oxidative power, we hypothesized that it causes DNA mutation and cell death via oxidation and that antioxidants could prevent this from occurring. To test this, we first ...


Food And Culture In Ghana, Une Applied Nutrition Program Jul 2019

Food And Culture In Ghana, Une Applied Nutrition Program

All Student-Created Educational Resources

This handout discusses food behavior in Ghana and the influence of Ghanaian culture and religious beliefs on food traditions. Ghanaian staple foods, traditional eating patterns, food preparation, and dining practices are discussed. This handout also includes a brief description of traditional health beliefs and the current food practices of Ghanaians living in the United States.


Food And Culture Fact Sheet Vietnam, Une Applied Nutrition Program Jul 2019

Food And Culture Fact Sheet Vietnam, Une Applied Nutrition Program

All Student-Created Educational Resources

This handout describes Vietnamese cultures and traditional diet. Vietnamese dishes are often built around rice, broth, and layers of flavor. The Vietnamese people have several nutritional and health beliefs stemming from Chinese traditional medicine. Vietnam has one of the most famous market and street food culture of the world.


Drug Safety Africa: An Overview Of Safety Pharmacology & Toxicology In South Africa., Brian D Guth, Anne F Grobler, Kendall S Frazier, Andrea Greiter-Wilke, Danuta Herzyk, Tertius A Hough, Asrar Ali Khan, Michael Markert, James D Smith, Karen L. Svenson, Sara Wells, Michael K Pugsley Jul 2019

Drug Safety Africa: An Overview Of Safety Pharmacology & Toxicology In South Africa., Brian D Guth, Anne F Grobler, Kendall S Frazier, Andrea Greiter-Wilke, Danuta Herzyk, Tertius A Hough, Asrar Ali Khan, Michael Markert, James D Smith, Karen L. Svenson, Sara Wells, Michael K Pugsley

Faculty Research 2019

This meeting report is based on presentations given at the first Drug Safety Africa Meeting in Potchefstroom, South Africa from November 20-22, 2018 at the North-West University campus. There were 134 attendees (including 26 speakers and 34 students) from the pharmaceutical industry, academia, regulatory agencies as well as 6 exhibitors. These meeting proceedings are designed to inform the content that was presented in terms of Safety Pharmacology (SP) and Toxicology methods and models that are used by the pharmaceutical industry to characterize the safety profile of novel small chemical or biological molecules. The first part of this report includes an ...


Real-Time Stealth Intervention For Motor Learning Using Player Flow-State, Ramin Tadayon, Ashish Amresh, Troy Mcdaniel, Sethuraman Panchanathan Jun 2019

Real-Time Stealth Intervention For Motor Learning Using Player Flow-State, Ramin Tadayon, Ashish Amresh, Troy Mcdaniel, Sethuraman Panchanathan

Ashish Amresh

We present a novel approach to real-time adaptation in serious games for at-home motor learning. Our approach assesses and responds to the “flow-state” of players by tracking and classifying facial emotions in real-time using the Kinect camera. Three different approaches for stealth assessment and adaptation using performance and flow-state data are defined, along with a case-study evaluation of these approaches based on their effectiveness at maintaining positive affective interaction in a subject.


Effects Of Childhood Trauma On Neurological Development And Mental, Physical Health In Adulthood, Sara Mckissick Jun 2019

Effects Of Childhood Trauma On Neurological Development And Mental, Physical Health In Adulthood, Sara Mckissick

D.U.Quark

Unfortunately, childhood maltreatment and trauma are prevalent in society. As awareness grows, so does the research on the long-term effects early exposure to traumatic events has on the developing person. Socioeconomic hardships, psychopathologies, and cognitive deficiencies correlate with early childhood adverse experiences. This review will compare normal neurological activity and development to that of children who have experienced childhood trauma. It will also further explore various factors such as the level of trauma, the onset of exposure, duration or recurrence of trauma experienced. Finally, this review will examine the effects that manifest themselves in adulthood to further understand the detrimental ...