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

Digital Commons Network™

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

Louisiana State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 2821 - 2850 of 9751

Full-Text Articles in Entire DC Network

Qpcr Amplification Of Heat Shock Protein 70 In Hybrid And Pure Populations Of Tigriopus Californicus, Angela Yoon Jan 2017

Qpcr Amplification Of Heat Shock Protein 70 In Hybrid And Pure Populations Of Tigriopus Californicus, Angela Yoon

Honors Capstones

No abstract provided.

Go to article

A Multiple Case Narrative Examining The Experiences Of Alumni Of A Minority Research And Training Program, Gretchen Schneider Burton Jan 2017

A Multiple Case Narrative Examining The Experiences Of Alumni Of A Minority Research And Training Program, Gretchen Schneider Burton

LSU Doctoral Dissertations

The implementation of minority research and training (MRT) programs at the post secondary level has risen to close the educational achievement gap and build undergraduate pathways to generate a highly skilled and diverse STEM pool. Although the numbers of advanced science related degrees have slowly increased over the past decade, partially due to the utilization of MRT programs, this increase has not been adequate to establish an impactful representation in either academic or industry research careers. Numerous studies identify various support interventions influencing positive outcomes among MRT participants achieving graduate degrees. However, majority of the studies utilize quantitative or a …

Go to article

The Fooding Of Narrative In Contemporary Women's Transnational Fiction, Stacey Marie Amo Jan 2017

The Fooding Of Narrative In Contemporary Women's Transnational Fiction, Stacey Marie Amo

LSU Doctoral Dissertations

The Fooding of Narrative in Contemporary Women’s Transnational Fiction examines how foodstuffs are strategically deployed in recent fiction about migration to the United States. The novels examined, all set in the period following the passage of the Immigration and Nationality Act of 1965, depict the experience of resettlement from a diverse set of postcolonial sites: Haiti, Cuba, Vietnam, and India. The Fooding of Narrative argues that food is deployed as a structuring trope and acquires narrative significance in articulating the profound sense of identity crisis that frequently accompanies the immigration experience. By focusing on food’s narrative significance in a broad …

Go to article

Evaluation Of A Role For Prolactin In The Recrudescense Of Ovarian Activity In Seasonally Anovulatory Mares, Erin Lea Oberhaus Jan 2017

Evaluation Of A Role For Prolactin In The Recrudescense Of Ovarian Activity In Seasonally Anovulatory Mares, Erin Lea Oberhaus

LSU Doctoral Dissertations

A series of experiments studied the possible role for prolactin in the spring-time recrudescence of ovarian activity in mares. The first experiment was based on cabergoline administration to seasonally anovulatory mares to prevent the seasonal rise in endogenous plasma prolactin to assess whether reduced prolactin altered onset of ovarian activity or first ovulation. Although prolactin concentrations were reduced, basal prolactin concentrations recovered from suppression by the time of the next injection (10 days later), even though low-dose sulpiride stimulation of prolactin was still suppressed by 85%. The subsequent experiment tested whether season affected the duration and degree of suppression produced …

Go to article

Effect Of Metal Speciation In Fly Ash On Environmentally Persistent Free Radical Formation, Elisabeth Eileen Cook Jan 2017

Effect Of Metal Speciation In Fly Ash On Environmentally Persistent Free Radical Formation, Elisabeth Eileen Cook

LSU Doctoral Dissertations

Waste incineration and Superfund sites lead to the formation of pollutants harmful to both the environment and human health. Environmentally Persistent Free Radicals (EPFRs) are a class of newly discovered radical pollutants known to form on combustion by-products such as fly ash and particulate matter. EPFRs are rapidly gaining attention for their harmful effects on the environment and human health. Previous research has shown the formation of EPFRs through surface-mediated reactions with transition metal-oxides on particulates. The work presented in this dissertation explores the relationship between fly ash composition and EPFR formation. Fly ash production occurs from combustion systems, namely …

Go to article

Aleksander Peçi Before And After The Iron Curtain, Elida Dakoli Jan 2017

Aleksander Peçi Before And After The Iron Curtain, Elida Dakoli

LSU Doctoral Dissertations

Abstract This research describes the life, compositional style and works of one of the most well-known Albanian composers, Aleksander Peçi, focusing on how the political climate affected his life and his art. Several of Peçi’s techniques are examined, including Carousel structure, Cartesian Production, Kabaoisos, and Polygravité. Albanian iso-polyphony and its influence on Peçi’s work are discussed. The research was done in hopes of reaching a better understanding of the effects Communism and the subsequent period of freedom have had on Albanian music.

Go to article

Determining The Influence Of Imidacloprid And Glufosinate Ammonium On The Population Dynamics Of Twospotted Spider Mite Populations In Louisiana Cotton, Sebe Anthony Brown Jan 2017

Determining The Influence Of Imidacloprid And Glufosinate Ammonium On The Population Dynamics Of Twospotted Spider Mite Populations In Louisiana Cotton, Sebe Anthony Brown

LSU Doctoral Dissertations

Twospotted spider mites, Tetranychus urticae, is an important agricultural pest of many field crops worldwide. This study investigated the impacts of imidacloprid seed treatments on populations of twospotted spider mites while also investigating if exogenous applications of jasmonic acid can offset any hormone modulating effects caused by seed treatments. Imidacloprid seed treatments significantly increased cumulative adult mite days in 2013 but not 2015 or 2016 in the field. Applications of 10 millimolar jasmonic acid did not reduce mite severity or injury in all field trials. Imidacloprid seed treatments significantly increased all spider mite life stages in the laboratory while applications …

Go to article

Eduardo Gamboa's Life, Music, And Inspiration. Understanding The Influence Of Folk Music On His Work "Transparencias:" An Analysis, Performance Guide, And Violin Transcription, Perla Del Rocio Fernandez Lopez Jan 2017

Eduardo Gamboa's Life, Music, And Inspiration. Understanding The Influence Of Folk Music On His Work "Transparencias:" An Analysis, Performance Guide, And Violin Transcription, Perla Del Rocio Fernandez Lopez

LSU Doctoral Dissertations

The purpose of this dissertation is to explore the life and music of Mexican living composer Eduardo Gamboa. This study intends to fill a void on the research of Gamboa. This document provides detailed biographical information, information about the influences on his music, and an edition of Transparencias for violin. The first chapter provides a broad biography of the composer including his musical formation, folk experience, and a complete catalog of his works. The second chapter is an introduction about Transparencias and contains the point of view of the composer and of the flutist Tadeu Coelho, to whom Gamboa dedicated …

Go to article

Termite Gut Microbes As Tools And Targets For Termite Control, Chinmay Vijay Tikhe Jan 2017

Termite Gut Microbes As Tools And Targets For Termite Control, Chinmay Vijay Tikhe

LSU Doctoral Dissertations

The Formosan subterranean termite (FST), Coptotermes formosanus, is an invasive urban pest in the United States. Colonies of the FST are dependent on the symbiotic gut protozoa for cellulose digestion in the workers’ guts, and the gut bacterial community is known to provide essential nutrients to the termite. The objectives of this PhD research were to develop and evaluate paratransgenesis and phage therapy for termite control. During this study, a termite gut bacterium: Trabulsiella odontotermitis was genetically engineered and was evaluated as a ‘Trojan horse’ for paratransgenesis. We proved that T. odontotermitis can tolerate 50 times more concentration of ligand-Hecate …

Go to article

Evaluation Of Control Tactics For Management Of Sweetpotato Weevil (Coleoptera: Curculionidae), Jie Chen Jan 2017

Evaluation Of Control Tactics For Management Of Sweetpotato Weevil (Coleoptera: Curculionidae), Jie Chen

LSU Doctoral Dissertations

Sweetpotato weevil (SPW), Cylas formicarius elegantulus (Summer), is the most damaging root-feeding insect of sweetpotato, Ipomoea batatas L. (Lam), worldwide. The efficacy and compatibility of host plant resistance and insecticide control were evaluated in this dissertation. cv. Beauregard is the most susceptible cultivar for oviposition and offspring performance of SPW compared to cvs. Evangeline and Murasaki. The oviposition preference was shaped by the larval experience of SPW, providing evidence in support of the Hopkins’ Host-Plant Selection Principle. Although oviposition on cv. Murasaki was reduced, the egg capacity of SPW developed on cv. Murasaki was not decreased, indicating an adaptive behavior …

Go to article

Maternal Fatty Acid And Inflammatory Status During Pregnancy Are Related To Infant Heart Rate And Heart Rate Variability, Merritt Leanne Drewery Jan 2017

Maternal Fatty Acid And Inflammatory Status During Pregnancy Are Related To Infant Heart Rate And Heart Rate Variability, Merritt Leanne Drewery

LSU Doctoral Dissertations

Early life heart rate (HR) and heart rate variability (HRV) reflect autonomic maturation. Intervention with n-3 long chain polyunsaturated fatty acids (LCPUFAs) during pregnancy favorably affects fetal HR and HRV; similar observations have been reported with infant n-3 LCPUFA intake. Infant HR and HRV have not been assessed in relation to maternal fatty acid status during pregnancy. Further, exposure to intrauterine inflammation may underlie these observations, although this hypothesis has not been tested. The aim of this observational study was to explore associations between maternal fatty acid and inflammatory status during pregnancy and infant HR and HRV. Simple linear and …

Go to article

Evolutionary Interactions Of Feather Molt In Birds, Ryan Scott Terrill Jan 2017

Evolutionary Interactions Of Feather Molt In Birds, Ryan Scott Terrill

LSU Doctoral Dissertations

The evolution of feathers was a key innovation for birds. The many functions that feathers provide have allowed birds to diversify into myriad habitats and styles of life. However, feathers are lightweight and break down, and must be replaced regularly in a process known as molt. The patterns and timing with which birds molt varies within and between species, and these different strategies are likely a product of the different ways birds use their feathers and the uneven distribution of resources available for molt in time and space. So far, no studies have attempted to place these strategies into an …

Go to article

Disease, Bread, Efficiency: Rhetorics Of Victorian Education Reform, Vicki Jean Davis Jan 2017

Disease, Bread, Efficiency: Rhetorics Of Victorian Education Reform, Vicki Jean Davis

LSU Doctoral Dissertations

Disease, Bread, Efficiency: Rhetorics of Victorian Education Reform arose from my observation that, historically speaking, Anglo-American schools have always been “in crisis.” I argue that the crisis of the “failing school” is a rhetorical problem rather than an economic problem as most scholarship suggests. Much like the cultural myth of “the One True Love,” education reform debates tend to position the school as an institution that can rescue the nation from all perceived social ills. Not only is this unrealistic, the patterns of language are inconsistent as ideas about the purpose of school are translated into policy. This causes further …

Go to article

Effects Of Silicon And Nitrogen Fertilization On Growth, Yield, And Leaf Rust Disease Development In Wheat, Maryamossadat Shahrtash Jan 2017

Effects Of Silicon And Nitrogen Fertilization On Growth, Yield, And Leaf Rust Disease Development In Wheat, Maryamossadat Shahrtash

LSU Master's Theses

There are so many people who have helped me throughout my graduate studies and for whom I am grateful. I would like to take this opportunity to first and foremost thank God for his always guidance throughout my life and giving me the wisdom and the patience I needed to finish my thesis. I would like to thank Dr. Brenda Tubana for taking me in and providing me with guidance and knowledge. I also would like to thank my committee members, Prof. Brian D. LeBlanc who guided me, encouraged me and provided me with knowledge about sustainable agriculture and Dr. …

Go to article

Vertebral Pathologies And Implications For Economic Lifestyle Changes In Two Prehistoric Skeletal Populations, Alyxandra Leigh Stanco Jan 2017

Vertebral Pathologies And Implications For Economic Lifestyle Changes In Two Prehistoric Skeletal Populations, Alyxandra Leigh Stanco

LSU Master's Theses

Little research considers the vertebral column in relation to inter-populational variation and changes in economic lifestyle. Numerous studies have been conducted regarding the influence of activity-related stress on post-cranial elements such as the knees, hips and shoulders, but few studies have considered the vertebral column. This study examined the vertebral columns of two prehistoric skeletal populations. The Indian Knoll site, home to a population of early hunter-gatherers, is located in Ohio County, Kentucky along the Green River. Indian Knoll was first excavated in 1915 by C.B. Moore. The Moundville site, a chiefdom of early agriculturalists, is located in the Black …

Go to article

Quantitation Of Anti-Pythium Insidiosum Antibodies Before And After Immunotherapy In Healthy Dogs, Carmen Beatriz Arsuaga Jan 2017

Quantitation Of Anti-Pythium Insidiosum Antibodies Before And After Immunotherapy In Healthy Dogs, Carmen Beatriz Arsuaga

LSU Master's Theses

Pythium insidiosum is an aquatic oomycete that causes invasive, progressive granulomatous lesions of the skin in dogs, horses, and cats, and of the gastrointestinal tract in dogs. Quantitation of anti-P. insidiosum IgG antibodies can be used in dogs to both confirm a suspected diagnosis and to monitor response to therapy. Recently, an immunotherapeutic product (IP) has been marketed for the treatment of pythiosis in dogs, horses, and people. The aim of this study was to evaluate the effect of administration of this product on anti-P. insidiosum IgG concentrations in dogs. The IP was administered to seven, healthy hound mixes on …

Go to article

Optimization Of The Extraction Of Procyanidin B-2 Rich Extract From Unfermented Cocoa Using Response Surface Methodology And Interaction Of Procyanidin B-2 Rich Cocoa Extract With Collagenase And Elastase As Biomarkers Of Skin Aging, Marco Eduardo Toc Sagra Jan 2017

Optimization Of The Extraction Of Procyanidin B-2 Rich Extract From Unfermented Cocoa Using Response Surface Methodology And Interaction Of Procyanidin B-2 Rich Cocoa Extract With Collagenase And Elastase As Biomarkers Of Skin Aging, Marco Eduardo Toc Sagra

LSU Master's Theses

Skin ageing is a natural process accelerated by environmental exposure that generate reactive oxygen species and activates enzymes that degrade the integrity of the dermis. Cocoa powder (Theobroma cacao) is a good source of polyphenols, particularly procyanidins and flavan-3-ols, with potential enzyme inhibitory activities. In this study we determined whether cocoa extraction standardized to its procyanidin B-2 content has a potential application as anti-ageing bioactive compound. Oil-bath-assisted extraction (OBAE) and microwave-assisted extraction (MAE) were optimized for procyanidin B-2 rich extract using response surface methodology and water as solvent. Methanol (70% in water) extraction was the control to which other extraction …

Go to article

Evaluation Of The Microbial Quality Of Cantaloupe Fruit Produced On Raised Or Flat Beds Following A Flooding Event, Isaack Kikway Jan 2017

Evaluation Of The Microbial Quality Of Cantaloupe Fruit Produced On Raised Or Flat Beds Following A Flooding Event, Isaack Kikway

LSU Master's Theses

Floodwater can contain microbial contaminants such as plant and foodborne pathogens and can compromise the quality of fresh fruit and vegetables produced in Louisiana. The goal of this research was to determine the impact of flooding on microbial quality (foodborne and plant pathogens) of cantaloupe fruit produced on raised or flat beds. Cantaloupe fruit produced on 30 cm raised beds or flat ground, were flooded with a mixture of surface and well water spiked with three generic Escherichia coli strains (ATCC 23716, 25922, 11775). Mean baseline generic Escherichia coli and total coliform populations in flood water (mixture of spiked well …

Go to article

Feasting In Florida: Evidence Of Swift Creek Ceremonial Feasting And Multi-Group Interactions At Byrd Hammock South (8wa30), Wakulla County, Fl, Joseph Michael O'Keefe Jan 2017

Feasting In Florida: Evidence Of Swift Creek Ceremonial Feasting And Multi-Group Interactions At Byrd Hammock South (8wa30), Wakulla County, Fl, Joseph Michael O'Keefe

LSU Master's Theses

During the LSU 2015 Summer Field School at the Byrd Hammock South site (8WA30) in Wakulla County, Florida, excavations uncovered a large stratified pit-fill feature (Length 78 cm x Width 65 cm x Depth 136 cm) associated with the Early Swift Creek culture (A.D. 0 – 500). The Swift Creek have been generally identified as a transegalitarian society, and are believed to have participated in the phenomenon known as the Hopewell Interaction Sphere. The feature, Feature 1 (F1), was located approximately 60 meters south of Burial Mound B on the western edge of a semi-circular midden that surrounded a clean …

Go to article

Descriptive Aanalysis Of Agritourism In Louisiana: Motivation. Marketing. Limitations., Denys Maksymov Jan 2017

Descriptive Aanalysis Of Agritourism In Louisiana: Motivation. Marketing. Limitations., Denys Maksymov

LSU Master's Theses

This study aims to present information on the existing Louisiana agritourism industry and create a descriptive profile of agritourism operators, addressing specifically what motivates people to engage in agritourism. A subsequent focus of the study is to document marketing approaches used in promoting agritourism operations and concerns and limitations faced by Louisiana agritourism operators. These will be achieved through the following objectives: 1. Use a survey instrument to collect information on the demographics of farmers interested and/or engaged in agritourism, farm characteristics, types of activities offered in the agritourism operations, as well as motivators for engaging in agritourism. 2. Analyze …

Go to article

Cathartic Ethics In Psychoanalysis, Dylan Timothy O'Brien Jan 2017

Cathartic Ethics In Psychoanalysis, Dylan Timothy O'Brien

LSU Master's Theses

This thesis examines the complex role of ethics within Psychoanalytic theory, finding not a prescriptive ethics, but a reference to ethics in the cathartic methodology that I argue underpinned Psychoanalytic thought from the very beginning. The introduction provides the reader with the necessary background to the material to be covered. The first chapter examines the neglectful attitude found throughout the foundational writings of Psychoanalytic theory in the work of Sigmund Freud, as well as covering two different methods by which ethics are often reduced, and which Freud successfully avoided. The second chapter seeks the origin of an alternative ethics in …

Go to article

Dislocation, Brian Randall Deppe Jan 2017

Dislocation, Brian Randall Deppe

LSU Master's Theses

This photographic project, Dislocation, seeks to document the current state and decline of Cortana Mall in Baton Rouge, Louisiana. The mall was built in 1976 during the height of shopping mall construction and was one of the largest shopping centers in the country with five anchor stores and 139 retail spaces. Now, just 48 stores and two anchor stores remain open. This high vacancy rate and deterioration of the mall is due to suburban flight, the building of new shopping centers in southern Baton Rouge, and changing consumer trends, which has led to malls closing across the country. My photographs …

Go to article

Palynostratigraphy And Environmental Implication Of Organic-Walled Microfossils Recovered From Iodp Site U1435, Mitchell Clifford Gregory Jan 2017

Palynostratigraphy And Environmental Implication Of Organic-Walled Microfossils Recovered From Iodp Site U1435, Mitchell Clifford Gregory

LSU Master's Theses

Extensive studies have examined the syn- and post-rift sediments in the South China Sea and surrounding margins, but pre-rift, Eocene deposits are rare. Here we examine organic-walled microfossils from the South China Sea, recovered at Site U1435 of IODP Expedition 349 to provide palynostratigraphic control and characterize the environmental setting before, and in response to, the initiation of seafloor spreading in the basin ~33 Ma. The well preserved palynological assemblage recovered allow dating of sediments sampled at Site U1435. Units II and III are now subdivided in 4 subzones; Zone 1 is essentially barren, Zones 2 and 3A are assigned …

Go to article

The Effectiveness Of Isco Injection Methods For Remediation Of Groundwater, Matthew Ryan Vidrine Jan 2017

The Effectiveness Of Isco Injection Methods For Remediation Of Groundwater, Matthew Ryan Vidrine

LSU Master's Theses

In-Situ Chemical Oxidation (ISCO) injections were performed at Petro Stopping Centers # 10 (Petro) in December 2013 and June 2015. The methodology was direct injection of a heavy oxidizer, RegenOx®, followed by a time-release oxygen compound, ORC Advanced®, into a plume of gasoline sitting on top of the water in the aquifer in hope that this remediate the aquifer. Both chemicals are registered trademarks of the Regenesis® Company. The levels of contaminates have dropped considerably. However, Petro has not achieved closure criteria according to RECAP standards. The site is classified as a GW-1B, subject to the most stringent of remediation …

Go to article

Main Line, Michael Pepp Jan 2017

Main Line, Michael Pepp

LSU Master's Theses

Main Line was developed as a 20-minute solo performance piece by the influence of my graduate training at Louisiana State University’s M.F.A. acting program. The writing and the performance of this project served as a graduation requirement as well professional experience and exploration of my personal aesthetics of storytelling, actors craft, production design, and independent theatre making. This thesis acts like a guide to my process of devising theatre. I was inspired and determined to produce work that was meaningful, political, and entertaining. Main Line explores the narrative of black experiences within a New Orleans culture that centers the movement …

Go to article

Fitness Costs And Inheritance Of Bt Cry2ab2 Resistance In Fall Armyworm, Spodoptera Frugiperda (J.E. Smith), Binod Acharya Jan 2017

Fitness Costs And Inheritance Of Bt Cry2ab2 Resistance In Fall Armyworm, Spodoptera Frugiperda (J.E. Smith), Binod Acharya

LSU Master's Theses

Evolution of resistance in target pest populations is a major threat to the sustainability of transgenic crops expressing Bacillus thuringiensis (Bt) proteins. Fall armyworm, Spodoptera frugiperda (J.E. Smith), is a cross-crop target pest of Bt corn, Bt cotton, and Bt soybean. This pest, thus far, is the only target pest species that has developed field resistance to Bt crops in multiple areas across countries. Cry2Ab2 is a common Bt protein expressed in transgenic corn and cotton targeting lepidopteran pests including S. frugiperda. The objective of this study was to characterize fitness costs and inheritance of Cry2Ab2 resistance in S. frugiperda. …

Go to article

Evaluation Of Broad Anti-Herpesviral Activity With Α-Hydroxytropolones, Shannon David Dehghanpir Jan 2017

Evaluation Of Broad Anti-Herpesviral Activity With Α-Hydroxytropolones, Shannon David Dehghanpir

LSU Master's Theses

Herpesviruses are ubiquitous in animals and cause economic losses concomitant with many diseases, including upper respiratory disease, keratitis, abortion, neonatal death, and neurologic disease. The majority of the domestic animal herpesviruses are within the subfamily Alphaherpesvirinae, along with the prototypical human herpes simplex virus 1 (HSV-1). Suppression of HSV-1 replication has been reported with α-hydroxytropolones (αHTs), which are aromatic ring compounds that have broad bioactivity due to potent chelating activity. It is postulated that αHTs inhibit enzymes within the nucleotidyltransferase superfamily (NTS), similarly structured enzymes that require divalent cations for nucleic acid cleavage activity. One potential herpesviral target includes the …

Go to article

On-Site Sperm Cryopreservation For Aquatic Repository Development And User Group Linkage, William Martin Childress Jan 2017

On-Site Sperm Cryopreservation For Aquatic Repository Development And User Group Linkage, William Martin Childress

LSU Master's Theses

Although on-site cryopreservation of aquatic species sperm in nitrogen-vapor shipping dewars has been used for more than 30 yr, many limitations remain. Due to the size of shipping dewars, most studies are small scale and can only produce tens of samples. The freezing temperatures that can be achieved are also affected by the size of the dewar and the number of samples being frozen due to the heat load. In addition, often due to timing or remote location these samples cannot be shipped, and if they are shipped, quality can be lost and the samples must be discarded. The goal …

Go to article

Grounds For Displacement: Issues Of Migration On Louisiana's Disappearing Coast, Jessica Rose Simms Jan 2017

Grounds For Displacement: Issues Of Migration On Louisiana's Disappearing Coast, Jessica Rose Simms

LSU Doctoral Dissertations

This research inquiry engages with residents from three Louisiana parishes who have already or are currently facing possible migration decisions. The research focuses on understanding the links among the influence and mobility of three factors: social relations (i.e., faith-based networks, civic organizations, family, cultural and heritage identities, etc.), inherent resilient practices, and place, including sense of and attachment to it. It will draw from those bodies of literature as well as environmental migration literature, while underscoring that decisions of migration are influenced by environmental factors, but ultimately shaped by a complexity of often simultaneous forces, including social, political-economic, and cultural …

Go to article

Evaluation Of Estrous Response Patches As A Tool To Determine Optimum Timing For Artificial Insemination And If Gonadotropin-Releasing Hormone Is Needed At Timed-Ai In Beef Cattle, Danilo Demeterco Jan 2017

Evaluation Of Estrous Response Patches As A Tool To Determine Optimum Timing For Artificial Insemination And If Gonadotropin-Releasing Hormone Is Needed At Timed-Ai In Beef Cattle, Danilo Demeterco

LSU Master's Theses

Two experiments evaluated using an estrous-detection patch to identify animals that are in standing estrus at split-timed AI (STAI) and the necessity of a gonadotropin-releasing hormone (GnRH) injection at STAI on a 7-Day CO-Synch + CIDR protocol. In experiment 1 (n=216) and in experiment 2 (n=101), multiparous lactating crossbred beef cows were stratified by age, BW, BCS, and post-partum interval to 2 treatment groups: CTRL=timed-AI (TAI) at 72h post CIDR removal, or TRT=STAI at 72 or 84h post CIDR removal. All females received GnRH plus a CIDR on d0, prostaglandin-F2α, CIDR removal, and an Estrotect estrous-detector patch on d7. At …

Go to article

First Prev Next Last