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Role Of Ε-Poly-Lysine In Mixed Surimi Gel, Zhaorui Li, Guangcan Liang, Yungang Cao, Fang Yuan, Miaomiao Liu, Zelong Liu, Youling L. Xiong

Animal and Food Sciences Faculty Publications

The effects of different concentrations of ε-Poly-lysine (ε-PL: 0.005%, 0.01%, 0.02%, 0.04%, and 0.06%) on the marine fish-egg white protein compound gels, treated with 0.4% TGase induced cross-linking were systematically investigated under low salt and phosphorus-free conditions (0.5% NaCl). The results showed the combination of ε-PL and TGase had a synergistic effect on improving sectional gel properties of composite surimi samples. Wherein the rheological, LF-NMR, and SEM results confirmed that the addition of ε-PL based on 0.4% TGase significantly improved the gel strength (to the highest value: 781.63 g·cm), apparent viscosity, and G 'value of the composite surimi sample, as …

The 1-Back Matching/Mismatching Paradigm With Pigeons (Columba Livia): Evidence For Explicit Learning?, Daniel Peng

Theses and Dissertations--Psychology

With humans, a distinction can be made between explicit and implicit learning. language can be used to describe rule-based learning commonly seen in explicit, but not implicit learning. Unfortunately, we cannot do so with animals. Therefore, a non-verbal paradigm is needed to differentiate the types of learning. One method to make such a distinction is by training animals under a conditional discrimination task such as matching-to-sample with reinforcement delayed until a choice is made on the next trial: otherwise known as a 1-back procedure. In this experiment an alternating matching/mismatching to sample task under a 1-back schedule of reinforcement was …

Neural Hyperactivity During Value-Based Decision-Making In People With Daily/Near Daily Cannabis Use, Miranda Ramirez

Theses and Dissertations--Psychology

Value-based decision-making involves the coordinated effort of multiple brain regions to guide future choices based on past experiences. These processes are disrupted in cannabis use disorder, where individuals continue to use cannabis despite negative consequences. Reinforcement learning (RL) paradigms can be used to capture changes in the value of available options and may inform how the brain is impacted by frequent cannabis use. This study combined fMRI with behavioral modeling of probabilistic choice task data to compare value-based choices between young adults reporting daily/near daily cannabis use (CAN) and controls (CTRL). Participants selected one of two options reinforced ($0.25) at …

Effect Of A Brief Coping Intervention On Activity Of Target Organs Of The Sympathetic And Parasympathetic Nervous Systems During Stress, Kyle P. Rawn

Theses and Dissertations--Psychology

Stress is a critical aspect of the human experience and how an individual responds to stress can shape future outcomes, such as physical and mental health, as well as shape the patterns of stress responding that persist throughout one’s lifespan. Coping is a central element of stress responding and can strongly influence the outcome of the stress process. Successful coping can alleviate stress, but ineffective coping may lead to less-than-optimal responding. For example, aspects of the biological stress response, such as activity of target organs for the sympathetic and parasympathetic nervous systems, have important implications for future susceptibility to health …

Influence Of Oral Contraceptives On Alcohol Use In Young Adult Women, Ashley Strzelecki

Theses and Dissertations--Psychology

Rates of heavy drinking and Alcohol Use Disorder are rising dramatically in young adult women, making it important to better understand female-specific risks for problematic drinking. Circulating levels of ovarian hormones are one potential mechanism influencing alcohol use in women. Many young adult women use oral contraceptives (OCs) that alter endogenous hormone levels, and little is known about how OCs and the synthetic hormones they contain may influence alcohol use. This dissertation consists of three studies that investigated alcohol consumption in women using OCs and explored potential mechanisms through which OCs may influence alcohol use. Study 1 compared self-reported alcohol …

It Takes A Village: Impact Of Lgbtq+ Community On The Relationship Between Parenting Stress, Parent Mental Health, And Child Adjustment, Kevin Mcaweeney

Theses and Dissertations--Psychology

While LGBTQ+ parented families are largely the same as their cis-het parent counterparts, they still experience unique factors exclusive to them. One such factor is access to the LGBTQ+ community. While research has emphasized the importance of community within the family system, the role the LGBTQ+ community can play for LGBTQ+ parented families is largely unexplored. Additionally, LGBTQ+ research examining parents of adolescents is similarly lacking. Utilizing a sample of LGBTQ+ parents with adolescent children, and informed by ecological systems theory, self-determination theory, and the parenting stress model, I examine the influence parent’s sense of LGBTQ+ community has on the …

Development Of The Trait Response To Emotion Dimensional Measure For Use In Minoritized Populations, Anita Adams

Theses and Dissertations--Psychology

Trait responses to emotion (TREs) are personality traits that develop from how one consistently responds to and copes with emotions. TRE development is influenced by demographic factors, such as age, gender, and early life adversity, and TREs can influence how one copes with a variety of stressors. TRE theory and measurement is relatively new, and although TREs have been validated in majority race samples, TRE theory and measurement have not been validated in minority race samples, particularly in African American populations. This dissertation is taking the first preliminary steps for the development of a cross-cultural trait response to emotion dimensional …

Hormonal Effects On Adhd Symptoms In Adolescents Across The Menstrual Cycle, Ashley G. Eng

Theses and Dissertations--Psychology

Background: Females with attention-deficit/hyperactivity disorder (ADHD) become particularly impaired during adolescence, experiencing increased rates of depression and anxiety, as well as important public and personal health outcomes like increased suicide attempts, risky sexual behavior, and substance use. However, female-specific risk factors for ADHD have been vastly understudied despite this increased impairment and comorbidity. One particularly understudied risk factor is the dramatically rising and fluctuating levels of ovarian hormones during late puberty that begin cycling monthly. In adult women, rapid decreases in estrogen levels increase risk for ADHD symptoms across the menstrual cycle, particularly for those with high trait impulsivity. Preliminary …

The Effect Of Cytomegalovirus Infection On Daily Stress Processes In Early Adulthood, Elana Gloger

Theses and Dissertations--Psychology

Chronic stress increases risk for disease, poor health, and early mortality. Cytomegalovirus (CMV), a common latent herpes virus, may promote neurological changes that increase vulnerability to chronic stress by way of self-regulatory deficits, though this has yet to be directly tested. Investigating CMV at younger ages is crucial to understand the effect of CMV across the lifespan and identify modifiable health-factors for future anti-aging interventions. The present study aimed to investigate how, and for whom, CMV associates with daily stress processes in early adulthood.

Participants (N = 108, M_age = 19.7, 83.3% female, 72% White) completed an in-person lab …

Fluctuations In Alcohol Impairment Of Working Memory Across The Menstrual Cycle, William Mcgarrigle

Theses and Dissertations--Psychology

Behavioral endocrinology studies in women suggest that higher circulating levels of the ovarian sex hormone estradiol (E2) may be linked to better working memory performance, especially under conditions of cognitive impairment (e.g., age-related cognitive decline). Phases of the menstrual cycle characterized by different levels of E2 may therefore influence the degree to which women are vulnerable to alcohol impairment of working memory. The current thesis used a within-subjects design to test the hypothesis that women are less sensitive to acute alcohol-induced impairment of working memory when E2 is elevated during the menstrual cycle. A sample of 75 premenopausal women completed …

Cognitive-Behavioral Effects And Sex Differences In Alcohol Use, Mia Radevski

Theses and Dissertations--Psychology

Addiction models (e.g., iRISA model) suggest that excessive substance use can result in behavioral consequences such as decreased response inhibition and increased salience attribution toward alcohol cues. The primary goal of this project was to explore potential sex differences in these characteristics of addiction. This dissertation is comprised of two separate but related studies. Study 1 investigated sex differences in inhibitory control and attentional bias. The central hypotheses are 1) women who reported heavy-drinking would display greater disruptions in behavioral inhibitory control following alcohol-related cues, 2) men who reported heavy-drinking would display greater attentional bias toward alcohol-related cues, and 3) …

Menstrual Cycle Phase And Hormonal Effects On Emotional Eating In Females With Attention-Deficit/Hyperactivity Disorder, Urveesha Nirjar

Theses and Dissertations--Psychology

Previous research has shown that cyclical fluctuations in ovarian hormones can predict changes in ADHD symptoms as well as eating behaviors, particularly emotional eating across the menstrual cycle. Previous studies have so far only examined the effects of estrogen (E2), progesterone (P4) and cycle phase in predicting individual symptoms or disorders such as ADHD or eating disorders or related behaviors separately. The aim of this study is to examine how emotional eating is influenced by naturally occurring hormonal and cycle changes in a sample overrecruited for ADHD. Seventy-eight individuals (assigned female at birth) with menstrual cycles overrecruited for ADHD provided …

Development Of A Novel Beam-Type Neutron Lifetime Experiment Using Ultracold Neutrons, Nicholas Floyd

Theses and Dissertations--Physics and Astronomy

Precision measurements of the neutron lifetime are critical to tests of the Standard Model. The CKM quark mixing matrix has recently been shown to deviate from unitarity in the top row, motivating the development of alternative extractions of the first element. Complementary measurements of the neutron’s lifetime and decay correlations can be used to accomplish this.

While the reported neutron lifetime by the Particle Data Group is taken from ultracold neutron (UCN) measurements, a separate class of experiments suggest a value in four sigma disagreement, meriting further study. The goal of the UCNProBe experiment at Los Alamos National Laboratory is …

Nitrogen Fertilization And Harvest Management Improve Forage And Crude Protein Content In Crabgrass, B. C. Pedreira, I. T. M. D. Barros, J. I. Yasuoka, D. Helwig, J. K. Farney, G. F. Sassenrath

IGC Proceedings (1977-2023)

Crabgrass (Digitaria spp.) is an annual summer grass that can provide high-quality forage, but optimal management strategies are unclear. Our objective was to compare the yield and quality of crabgrass (Mojo and Quick-N-Big) under different nitrogen rates and harvest management. The experimental design was a randomized complete block with five treatments and three replications for each crabgrass variety, totaling fifteen experimental units for both Mojo and Quick-N-Big, in adjacent sites. Treatments were nitrogen rates (0, 100, and 200 lb N/acre) and harvest management (cut once or twice per year) for two growing seasons (2020 and 2021). Total forage accumulation …

Chemical Composition And Microbial Diversity Of The Silage Of Forage Peanut Harvested At Two Regrowth Ages And Treated With Microbial Inoculants, A. J. S. Macêdo, O. G. Pereira, V. P. Da Silva, A. J. Dos Anjos, W. Alves, H. R. O. Santos, K. G. Ribeiro

IGC Proceedings (1977-2023)

The objective of this study was to evaluate the chemical composition and microbial diversity of the silage of forage peanut harvested at 40 and 80 days of regrowth and treated with microbial inoculants. The inoculants evaluated were commercial inoculant (CI) Sil-All 4×4 (Lallemand®, Brazil); the AV14.17, Lactiplantibacillus pentosus strain (ISO) isolated from alfalfa silage; and control (CTRL), without inoculant. A total of 500 g of forage was ensiled in nylon-polyethylene bags (25.40 × 35.56 cm). After 60 days of fermentation, the bags were opened and silages were analyzed for dry matter (DM), mineral matter (MM), organic matter (OM), crude protein …

Evapotranspiration Of Rewetted And Drained Fen Soils With Grass – Long Term Lysimeter Studies, M. Pesch, J. Hoysagk, F. Eulenstein, A. Behrendt

IGC Proceedings (1977-2023)

In the context of reducing greenhouse gas (GHG) emissions to combat climate change, rewetting of peatlands is of particular importance. High groundwater levels covering organic matter in the soil prevent its oxidation to CO₂. The amount of water needed to allow the rewetting of peatlands can be determined in lysimeter studies.

The evapotranspiration in fens depends essentially on the groundwater table, the vegetation (transpirational active biomass) and the saturation deficit of the atmosphere. After rewetting, these factors can lead to an evapotranspiration of 1000 l m^-2 a^-1 and even 2000 l m^-2 a^-1 in …

Industrial Hemp Forage Potential, Swarup Podder, John H. Fike, B. Wilson

IGC Proceedings (1977-2023)

Hemp (Cannabis sativa L.) has been a valuable species for humans throughout history due to its adaptability and diverse uses. Farmers are interested in hemp as a forage and feedstuff due to its unique nutritional properties and fast summer production. Moreover, the presence of cannabinoids in leaf and bud tissues may provide pharmacological benefits to animal health, productivity, and product quality under different regulatory frameworks. This study examined two hemp cultivars, Grandi and Joey, solely as forage crops, and samples were taken at different growth stages in Blacksburg, VA, USA, in 2021. The highest biomass production of 1.41 tons per …

Differential Responses Of Yield And Shoot Traits Of Five Tropical Grasses To N And Distance To Trees In Silvopastoral Systems, L. S. Pontes, Emilio A. Laca

IGC Proceedings (1977-2023)

Light intensity and nitrogen (N) availability are important factors influencing the growth of C₄ forage species. Trade-offs may occur in the adaptive responses of species to shading and N inputs, and functional shoot traits can help to explain the consequences of these responses for species performance. Our objective was to gain understanding of the mechanisms between traits of five C₄ perennial grasses determining above-ground dry matter yield (DMY) when both resources, light and N, vary. Forage grasses were grown in six shading conditions (full sunlight vs. five positions between Eucalyptus dunnii rows) with two N levels (0 vs. …

Clovers Around The World: A Symposium In Memory And Honor Of Dr. Norman L. Taylor, Kenneth H. Quesenberry, D. Boone, B. M. Irish

IGC Proceedings (1977-2023)

Trifolium is arguably the largest and most diverse genera of herbaceous forage legumes (Zohary and Heller, 1984). Dr. Norman L. Taylor, Professor Emeritus, Department of Plant and Soil Science, University of Kentucky, deceased, was a pioneer and champion of collection and preservation of Trifolium species throughout his 57-year career. Dr. Taylor was a native of northern Kentucky, born near where this Conference is being held.

Estimating The Carrying Capacity For Habitat Of Urial Wild Sheep (Ovis Orientalis) In Tandoureh National Park, Iran, M. Rahimian, F. Tabatabaei Yazdi, Mansour Mesdaghi

IGC Proceedings (1977-2023)

In an attempt to estimate forage production and carrying capacity of wild ungulates in Tandoureh National Park of Iran, the Babanestan grassland was selected, as the typical habitat of about 200 Urial wild sheep. In order to estimate the carrying capacity of this habitat for foraging of Urial wild sheep, this habitat with an area of 132 hectares was classified as low flat (LF), high flat (HF), north aspect (NA), and south aspect (SA). Then, to estimate forage production, clipping method of comparative yield was used. In each land form, standing crop yield of five reference plots of 1-^{m2 …}

Development Of Novel Interspecific Fertile Cytotype (4x) Of Pennisetum Glaucum X Pennisetum Purpureum Utilizing Modified Ploidy Coupled With Embryo Rescue Technique, Maneet Rana, N. Kumar, R. Gajghate, S. Kumar, R. Kaldate, Kamini Gautam, R. P. Sah, R. Verma, H. A. Bhargavi, R. P. Saini, S. Ahmed, P. Kaushal, A. K. Roy, A. Chandra

IGC Proceedings (1977-2023)

Interspecific hybrids of genus Pennisetum (P. glaucum x P. purpureum) is the one of the most popular manmade hybrid. It combines the unique features of both P. glaucum (Pearl millet; Bajra) and P. purpureum (Napier; Elephant grass) species, which makes it more resilient to harsh environments with superior fodder quality. Due to ploidy level variation among the parents, these hybrids are sterile and propagated vegetatively only. To overcome this, attempts were made in the present study by exploring the feasibility of novel tetraploid pearl millet (2n=4x=28; Tetra 1; INGR 09047) developed at IGFRI, as a female parent in …

Integrating Grazing With 2,4-D And Florpyrauxifen To Control Broadleaf Weeds And Maintain Red Clover Productivity In Grass-Legume Pastures, M. J. Renz, G. M. Imhoff

IGC Proceedings (1977-2023)

In grass-legume pastures, 2,4-D-amine + florpyrauxifen-benzyl controls broadleaf weeds but red clover (Trifolium pratense L.) is eliminated. Grazing within a week prior to herbicide application is likely to reduce leaf surface area and may reduce red clover injury and maintain productivity. Experiments were conducted in 2020 and in 2021 to determine if red clover could be productive when 560 g ae ha-1 2,4-D-amine + 6.3 g ae ha^-1 of florpyrauxifen-benzyl with 1% v/v methylated seed oil applied in the spring was grazed before or after herbicide application. Grazing timings occurred 6, 4, or 2 days prior to herbicide …

Use Of Genuine Sources Of Ergot Resistance In Species Of The Dilatata Group Of Paspalum, R. Reyno, S. Murchio, C. Goñi, W. Iriarte, H. Oberti, Javier Do Canto, Walter Ayala, C. Rossi, M. Dalla-Rizza

IGC Proceedings (1977-2023)

Paspalum dilatatum Poir. (dallisgrass) is an excellent C4 forage for summer production, highly productive with a wide distribution within warm-temperate regions. P. dilatatum is native to South America with special relevance for milk and meat production since its forage quality is superior to that of other C4 forage grasses and it shows tolerance to frost and water stress. In situations of temperate and warm temperate climate, the presence of these species plays a key role in the ecological stability of the system due to the complementarity of the growth cycles between winter and summer grasses. Claviceps paspali (ergot) is a …

Fermentation Profile Of Signal Grass Silages Intercropped With Calopo Or Fertilized With Nitrogen And Treated With Microbial Inoculant, Karina G. Ribeiro, Tâmara Chagas De Silveira, João Paulo Santos Roseira, Albert José Dos Anjos, Wagner Souza Alvez, Danielle Nascimento Coutinho, Odilon G. Pereira

IGC Proceedings (1977-2023)

Tropical grasses have characteristics that allow the occurrence of undesirable fermentations resulting in low quality silage. Inoculants can improve silage quality. Fermentation profile and microbial population of signal grass silages under four management (M), with and without microbial inoculant, were evaluated. The experiment was carried out in a 4 × 2 factorial scheme, with silages of signal grass managed without N application (control, 0N), fertilized with 50 kg ha^-1 of N (50N), fertilized with 100 kg ha^-1 of N (100N), or signal grassintercropped with calopo (Calopogonium mucunoides D.) (LEG), with inoculant (I) andwithout inoculant (WI), in a …

Plant Breeding Perspectives For Alfalfa (Medicago Sativa L.) Success In Warm Climates, Esteban F. Rios, M. Murad Andrade, C. C. Fernandes Filho, P. Sipowicz, A. Biswas, R. Ulbricht, D. Basigalup, E. C. Brummer

IGC Proceedings (1977-2023)

Climate change can have major impacts on adaptation of forage species to agroecosystems around the world. The ability of breeders to select for traits that impart adaptability to climate resilience will be critical for the future of grasslands. Alfalfa (Medicago sativa L.) is the most important perennial forage legume in the world because of its relatively high yield and nutritional value. In Florida, nondormant cultivars were developed for improved adaptation to the state’s subtropical agroecosystem (‘Florida 66’, ‘Florida 77’, and ‘Florida 99’); however, these cultivars are not commercially available. Breeding efforts are underway to develop new nondormant alfalfa adapted …

Impact Of Fertilizer Type, Seed Coating, And Duration Of Exposure On The Germination Of Orchardgrass Seed, Edwin L. Ritchey, Christopher D. Teutsch

IGC Proceedings (1977-2023)

Cool-season grasses such as orchardgrass, are important components of forage systems in transition zone states like Kentucky. To maintain dense and vigorous sods, improved cool-season grass varieties are sometimes overseeded into existing stands in late-winter or early-spring. In many cases seed is mixed with fertilizer and top-dressed onto pastures. Little data are available on the impact of fertilizer type or duration of exposure on the germination of raw and coated grass seed. The objective of this study was to evaluate the impact of two fertilizer types, muriate of potash and a blended fertilizer (urea, diammonium phosphate, and muriate of potash), …

Accuracy And Precision Of Near Infra-Red Spectroscopy (Nirs) Versus Wet Chemistry In Forage Analysis, U. K. Saha, R. J. Kern-Lunbery

IGC Proceedings (1977-2023)

Near Infra-red Spectroscopy (NIRS) is an attractive option for forage analysis. NIRS is less labor intensive, nondestructive, rapid, environmentally friendly and provides accurate and precise results. However, many nutritionists are quick to brush off NIRS, citing ‘poor accuracy’. We evaluated the accuracy and precision of dry matter (DM), crude protein (CP), acid detergent fiber (ADF), and neutral detergent fiber (NDF) of 33 National Forage Testing Association (NFTA) proficiency test (PT) alfalfa hay samples analyzed by NIRS in 7 NIRS Forage and Feed Testing Consortium (NIRSC) member laboratories. The reference method averages (RMA), used to evaluate the NIRS results, were based …

Evaluation Of Different Genotypes Of Teosinte (Euchlaena Mexicana) For Herbage And Seed Production In Nepal, S. Sanjyal, John G. Hampton, P. Rolston, S. Marahatta

IGC Proceedings (1977-2023)

Teosinte is highly admired by the Nepalese farmers as a summer forage crop. It is also an important crop for milking animals in the tropical world where dairy husbandry is practiced. The only Sirsa cultivar of teosinte currently grown in Nepal takes 8 to 9 months from sowing to seed harvesting, which makes growing this crop difficult for farmers with small land holdings wanting to establish winter crops. Therefore, a diversity study on eighteen teosinte accessions was conducted in CRBD design. Seventeen teosinte accessions imported from CYMMIT Mexico and one locally grown Sirsa were evaluated in order to identify if …

Effects Of Insecticide And Tolerant Alfalfa Cultivars On Potato Leafhopper (Empoasca Fabae) Populations And Forage Yields In Quebec (Canada), Philippe Seguin, X. Shi, J. Saguez, Huguette Martel, A. Claessens

IGC Proceedings (1977-2023)

The potato leafhopper [PLH, Empoasca fabae (Harris)], which affects several crops including alfalfa (Medicago sativa L.), is a recurrent problem in several regions of Quebec. The objective was to evaluate alfalfa management tools in order to reduce yield losses caused by this pest. An experiment was conducted at two sites in Quebec over three field seasons to evaluate the impact of insecticide applications and the use of PLHtolerant cultivars on forage yield and PLH populations. Foliar insecticide applications in the seeding year reduced PLH populations but generally failed to impact alfalfa yields compared to untreated alfalfa. However, in one …

Addition Of Red Clover Or Birdsfoot Trefoil In Alfalfa-Based Mixtures To Improve The Forage Energy To Protein Balance, Philippe Seguin, Gaëtan F. Tremblay, M. Thériault, X. Godin, Shabtai Bittman, D. Hunt, J. Hakl, Gilles Bélanger, M.-N. Thivierge, Annick Bertrand, A. Claessens

IGC Proceedings (1977-2023)

The low ratio of sugars (S) to crude proteins (CP) in alfalfa (AL, Medicago sativa L.) leads to inefficient use of nitrogen by ruminants. The objective was to determine if adding red clover (RC, Trifolium pratense L.) or birdsfoot trefoil (BT, Lotus corniculatus L.) with or without a grass species to AL improved the forage S/CP ratio. Treatments were 100% AL (control) or AL-based mixtures with RC or BT in three proportions (75, 50, or 25% of seeded legumes) with either no grass or with timothy (Phleum pratense L.) or tall fescue (Schedonorus arundinaceus Schreb. Dumort.), resulting in …