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

Digital Commons Network™

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

2021

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 3691 - 3720 of 33734

Full-Text Articles in Entire DC Network

Volume Cxxxx, Number 7, November 5, 2021, Lawrence University Nov 2021

Volume Cxxxx, Number 7, November 5, 2021, Lawrence University

The Lawrentian

No abstract provided.

Go to article

Fall/Winter 2021: Treasure/Unidentified Specimen At 10x Magnification, Cate Nelson Nov 2021

Fall/Winter 2021: Treasure/Unidentified Specimen At 10x Magnification, Cate Nelson

St. Norbert College Magazine 2019-2023

Every issue, we invite one member of the college community to share their delight in an object found on campus. Here Cate Nelson ’24, one of the 2021 Summer Undergraduate Research Fellows, speaks to a specimen from an unidentified tree sapling that she discovered in the college's collection of microscope slides.

Go to article

Improving Motor Neuron-Like Cell Differentiation Of Henscs By The Combination Of Epothilone B Loaded Pcl Microspheres In Optimized 3d Collagen Hydrogel, Narges Mahmoodi, Jafar Ai, Zahra Hassannejad, Somayeh Ebrahimi-Barough, Elham Hasanzadeh, Houra Nekounam, Alex R. Vaccaro, Vafa Rahimi-Movaghar Nov 2021

Improving Motor Neuron-Like Cell Differentiation Of Henscs By The Combination Of Epothilone B Loaded Pcl Microspheres In Optimized 3d Collagen Hydrogel, Narges Mahmoodi, Jafar Ai, Zahra Hassannejad, Somayeh Ebrahimi-Barough, Elham Hasanzadeh, Houra Nekounam, Alex R. Vaccaro, Vafa Rahimi-Movaghar

Department of Orthopaedic Surgery Faculty Papers

Spinal cord regeneration is limited due to various obstacles and complex pathophysiological events after injury. Combination therapy is one approach that recently garnered attention for spinal cord injury (SCI) recovery. A composite of three-dimensional (3D) collagen hydrogel containing epothilone B (EpoB)-loaded polycaprolactone (PCL) microspheres (2.5 ng/mg, 10 ng/mg, and 40 ng/mg EpoB/PCL) were fabricated and optimized to improve motor neuron (MN) differentiation efficacy of human endometrial stem cells (hEnSCs). The microspheres were characterized using liquid chromatography-mass/mass spectrometry (LC-mas/mas) to assess the drug release and scanning electron microscope (SEM) for morphological assessment. hEnSCs were isolated, then characterized by flow cytometry, and …

Go to article

Preventing Foster Youth Homelessness, Spencer Lee Barthlett Nov 2021

Preventing Foster Youth Homelessness, Spencer Lee Barthlett

Selected Social Change Portfolios in Prevention, Intervention, and Consultation

Foster care youth in Sarasota County, FL and all through the United States face a large number of difficulties. These foster youth lack any plans for stability after departing the child welfare system which makes them likely to experience homelessness (Kelly, 2020). 23,000 youth “age out” of care each year and preventing homelessness for this population has developed into a major public health crisis (Shah et al., 2017). In 2019, they were 1,135 homeless people in Sarasota County, FL, 400 were teenagers and young adults, as compared to the total homeless populace in Florida which was 28,591 (Florida Council on …

Go to article

A Giant Nlr Gene Confers Broad-Spectrum Resistance To Phytophthora Sojae In Soybean, Weidong Wang, Liyang Chen, Kevin Fengler, Joy Bolar, Victor Llaca, Xutong Wang, Chancelor B. Clark, Tomara J. Fleury, Jon Myrvold, David Oneal, Maria Magdalena Van Dyk, Ashley Hudson, Jesse Munkvold, Andy Baumgarten, Jeff Thompson, Guohong Cai, Oswald Crasta, Rajat Aggarwal, Jianxin Ma Nov 2021

A Giant Nlr Gene Confers Broad-Spectrum Resistance To Phytophthora Sojae In Soybean, Weidong Wang, Liyang Chen, Kevin Fengler, Joy Bolar, Victor Llaca, Xutong Wang, Chancelor B. Clark, Tomara J. Fleury, Jon Myrvold, David Oneal, Maria Magdalena Van Dyk, Ashley Hudson, Jesse Munkvold, Andy Baumgarten, Jeff Thompson, Guohong Cai, Oswald Crasta, Rajat Aggarwal, Jianxin Ma

Purdue University Libraries Open Access Publishing Fund

Phytophthora root and stem rot caused by P. sojae is a destructive soybean soil-borne disease found worldwide. Discovery of genes conferring broad-spectrum resistance to the pathogen is a need to prevent the outbreak of the disease. Here, we show that soybean Rps11 is a 27.7-kb nucleotide-binding site-leucine-rich repeat (NBS-LRR or NLR) gene conferring broad-spectrum resistance to the pathogen. Rps11 is located in a genomic region harboring a cluster of large NLR genes of a single origin in soybean, and is derived from rounds of unequal recombination. Such events result in promoter fusion and LRR expansion that may contribute to the …

Go to article

Exposure Of Predatory And Scavenging Birds To Anticoagulant Rodenticides In France: Exploration Of Data From French Surveillance Programs, Meg-Anne Moriceau, Sébastien Lefebvre, Isabelle Fourel, Etienne Benoit, Florence Buronfosse-Roque, Pascal Orabi, Barnett A. Rattner, Virginie Lattard Nov 2021

Exposure Of Predatory And Scavenging Birds To Anticoagulant Rodenticides In France: Exploration Of Data From French Surveillance Programs, Meg-Anne Moriceau, Sébastien Lefebvre, Isabelle Fourel, Etienne Benoit, Florence Buronfosse-Roque, Pascal Orabi, Barnett A. Rattner, Virginie Lattard

United States Geological Survey: Staff Publications

Wild raptors are widely used to assess exposure to different environmental contaminants, including anticoagulant rodenticides (ARs). ARs are used on a global scale for rodent control, and act by disruption of the vitamin K cycle that results in haemorrhage usually accompanied by death within days. Some ARs are highly persistent and bioaccumulative, which can cause significant exposure of non-target species.We characterized AR exposure in a heterogeneous sample of dead raptors collected over 12 years (2008–2019) in south-eastern France. Residue analysis of 156 liver samples through LC-MS/MS revealed that 50% (78/156) were positive for ARs, with 13.5% (21/156) having summed second-generation …

Go to article

Dna Methylation At A Nutritionally Sensitive Region Of The Pax8 Gene Is Associated With Thyroid Volume And Function In Gambian Children, Toby Candler, Noah J Kessler, Chathura J Gunasekara, Kate A Ward, Philip James, Eleonora Laritsky, Maria S Baker, Roger Dyer, Rajavel Elango, David Jeffries, Robert A Waterland, Sophie E Moore, Marian Ludgate, Andrew M Prentice, Matt J Silver Nov 2021

Dna Methylation At A Nutritionally Sensitive Region Of The Pax8 Gene Is Associated With Thyroid Volume And Function In Gambian Children, Toby Candler, Noah J Kessler, Chathura J Gunasekara, Kate A Ward, Philip James, Eleonora Laritsky, Maria S Baker, Roger Dyer, Rajavel Elango, David Jeffries, Robert A Waterland, Sophie E Moore, Marian Ludgate, Andrew M Prentice, Matt J Silver

Children’s Nutrition Research Center Staff Publications

PAX8 is a key thyroid transcription factor implicated in thyroid gland differentiation and function, and PAX8 gene methylation is reported to be sensitive to the periconceptional environment. Using a novel recall-by-epigenotype study in Gambian children, we found that PAX8 hypomethylation at age 2 years is associated with a 21% increase in thyroid volume and an increase in free thyroxine (T4) at 5 to 8 years, the latter equivalent to 8.4% of the normal range. Free T4 was associated with a decrease in DXA-derived body fat and bone mineral density. Furthermore, offspring PAX8 methylation was associated with periconceptional maternal nutrition, and …

Go to article

Record Of Nesting And Fledgling Depredation On Crested Caracara (Caracara Cheriway) In Its Peri-Urban Habitat In The Guadalajara Metropolitan Area, West-Central Mexico, Perla Sugey González-Ruelas, Zayra Arery Guadalupe Muñoz-González, Ana Luisa Santiago-Pérez, Luis Fernando Ramírez-López, Claudia Aurora Uribe-Mú, Verónica Carolina Rosas-Espinoza Nov 2021

Record Of Nesting And Fledgling Depredation On Crested Caracara (Caracara Cheriway) In Its Peri-Urban Habitat In The Guadalajara Metropolitan Area, West-Central Mexico, Perla Sugey González-Ruelas, Zayra Arery Guadalupe Muñoz-González, Ana Luisa Santiago-Pérez, Luis Fernando Ramírez-López, Claudia Aurora Uribe-Mú, Verónica Carolina Rosas-Espinoza

Western North American Naturalist

Urban settings represent a challenge to most bird species, although some raptors seem to adjust to new urban environments. The Crested Caracara (Caracara cheriway) is known as an urban-tolerant species. Though caracaras are resident in west-central Mexico, there is no information about the species’ distribution, reproduction, and nesting within a metropolis such as Guadalajara. This species was using the peri-urban setting of the Guadalajara Metropolitan Area (GMA) to hunt, breed, construct its nests, and care for juveniles. To our knowledge, this is the first reported record of it breeding in a peri-urban setting in Mexico. On 15 February …

Go to article

First Ecological Characterization Of Whip Black Coral Assemblages (Hexacorallia: Antipatharia) In The Easter Island Ecoregion, Southeastern Pacific, Jan M. Tapia-Guerra, Cynthia M. Asorey, Erin E. Easton, Daniel Wagner, Matthias Gorny, Javier Sellanes Nov 2021

First Ecological Characterization Of Whip Black Coral Assemblages (Hexacorallia: Antipatharia) In The Easter Island Ecoregion, Southeastern Pacific, Jan M. Tapia-Guerra, Cynthia M. Asorey, Erin E. Easton, Daniel Wagner, Matthias Gorny, Javier Sellanes

School of Earth, Environmental, & Marine Sciences Faculty Publications

One of the main priorities of marine scientific research is to provide practical information and guidance for biodiversity conservation and management. In this context, the identification of key and fragile habitat-forming species is particularly important. Despite their ecological importance, whip corals in the order Antipatharia remain poorly studied around the world, and especially in the South Pacific. During recent expeditions to explore mesophotic and deep benthic habitats around Rapa Nui (Easter Island), dense assemblages of whip black corals were observed in situ. We here report the first detailed description of the distribution and abundance of these black coral assemblages …

Go to article

Spin Coupling In Magnetic Core - Shell Nanoparticles, Corisa Kons Nov 2021

Spin Coupling In Magnetic Core - Shell Nanoparticles, Corisa Kons

USF Tampa Graduate Theses and Dissertations

Magnetic nanoparticles (NPs) have garnered much interest due to the unique properties that emergewhen compared to their bulk counterparts. In particular, core-shell (CS) NPs offer the ability to tailor the magnetic properties of the system through careful selection of core and shell constituent materials. In this work, the magnetic ordering of CS NPs with contrast in core/shell features (moment, anisotropy, coercivity, etc.) have been investigated using a combination of X-ray magnetic circular dichroism spectroscopy (XMCD) and polarized small angle neutron scattering (SANS). First, temperature-dependent analyses of XMCD and SANS studies were carried out for CS NPs featuring a core composed …

Go to article

Riverine And Estuarine Co2-System Studies On The West Coast Of Florida, Christopher S. Moore Nov 2021

Riverine And Estuarine Co2-System Studies On The West Coast Of Florida, Christopher S. Moore

USF Tampa Graduate Theses and Dissertations

Coastal and estuarine acidification impacts ecosystem health and economic resources and has both natural and anthropogenic components (Cai et al., 2021). Riverine input is one of several important factors that can influence acidification in coastal ecosystems. Rivers disgorging into coastal environments can create strong gradients, both spatial and temporal, that make accurate CO2-system characterization challenging. The work described in this thesis provides a baseline CO2-system study of four major rivers that flow into Tampa bay with an emphasis on seasonal change. As a second objective, this thesis examines the effects of HgII additions on CO2-system measurements in organic-rich estuarine waters. …

Go to article

Advice As Metadiscourse: On The Gendering Of Women's Leadership In Advice-Giving Practices, Amaly Santiago Nov 2021

Advice As Metadiscourse: On The Gendering Of Women's Leadership In Advice-Giving Practices, Amaly Santiago

USF Tampa Graduate Theses and Dissertations

This dissertation is about advice as social practice. Specifically, I examine leadership discourse as communicatively constituted and advice-giving as creating a metadiscourse of gendered abilities and leadership asymmetries. In the light of the growing number of initiatives created for women to improve their status as leaders, this project examines leadership, not as a quality, but as discourse: as a communicative dynamic. This is in line with how organizations see leadership when they create leadership programs, for these programs are designed to advise or teach women to be different and better leaders. My purpose is to encourage inclusiveness and contribute to …

Go to article

Continuity Of Offending In Young Adulthood: A Test Of Moffitt’S Snares Hypothesis, Alex O. Widdowson, J.W. Andrew Ranson, Anna M. Kyser Nov 2021

Continuity Of Offending In Young Adulthood: A Test Of Moffitt’S Snares Hypothesis, Alex O. Widdowson, J.W. Andrew Ranson, Anna M. Kyser

Social and Cultural Sciences Faculty Research and Publications

Moffitt’s snares hypothesis posits that snares—such as addiction to drugs and alcohol, time spent incarcerated, unemployment, teenage parenthood, high school dropout, and disabling injuries—can trap individuals into persistent patterns of offending during periods in the lifecourse when desistance is normative. We test this hypothesis using data from the National Longitudinal Survey of Youth 1997 to examine the associations and mechanisms between snare exposure and criminal offending during young adulthood. Results indicate that snare exposure was associated with increased offending and that this was in part due to snare exposure undermining a successful transition to adulthood, harming health, and producing social …

Go to article

The Impact Of The Covid-19 Pandemic On An International Rehabilitation Study In Ms: The Cogex Experience, Anthony Feinstein, Maria Pia Amato, Giampaolo Brichetto, Jeremy Chataway, Nancy D. Chiaravalloti, Gary Cutter, Ulrik Dalgas, John Deluca, Rachel Farrell, Peter Feys, Massimo Filippi, Jennifer Freeman, Matilde Inglese, Cecilia Meza, Rob Motl, Maria Assunta Rocca, Brian M. Sandroff, Amber Salter Nov 2021

The Impact Of The Covid-19 Pandemic On An International Rehabilitation Study In Ms: The Cogex Experience, Anthony Feinstein, Maria Pia Amato, Giampaolo Brichetto, Jeremy Chataway, Nancy D. Chiaravalloti, Gary Cutter, Ulrik Dalgas, John Deluca, Rachel Farrell, Peter Feys, Massimo Filippi, Jennifer Freeman, Matilde Inglese, Cecilia Meza, Rob Motl, Maria Assunta Rocca, Brian M. Sandroff, Amber Salter

School of Health Professions

No abstract provided.

Go to article

A Whole Genome Duplication Drives The Genome Evolution Of Phytophthora Betacei, A Closely Related Species To Phytophthora Infestans, David A Ayala-Usma, Martha Cárdenas, Romain Guyot, Maryam Chaib De Mares, Adriana Bernal, Alejandro Reyes Muñoz, Silvia Restrepo Nov 2021

A Whole Genome Duplication Drives The Genome Evolution Of Phytophthora Betacei, A Closely Related Species To Phytophthora Infestans, David A Ayala-Usma, Martha Cárdenas, Romain Guyot, Maryam Chaib De Mares, Adriana Bernal, Alejandro Reyes Muñoz, Silvia Restrepo

2020-Current year OA Pubs

BACKGROUND: Pathogens of the genus Phytophthora are the etiological agents of many devastating diseases in several high-value crops and forestry species such as potato, tomato, cocoa, and oak, among many others. Phytophthora betacei is a recently described species that causes late blight almost exclusively in tree tomatoes, and it is closely related to Phytophthora infestans that causes the disease in potato crops and other Solanaceae. This study reports the assembly and annotation of the genomes of P. betacei P8084, the first of its species, and P. infestans RC1-10, a Colombian strain from the EC-1 lineage, using long-read SMRT sequencing technology. …

Go to article

Ramon (Brosimun Alicastrum) Foliage As Supplement For Lactating Dual Purpose Cows, Carlos A. Sandoval-Castro, R. Cetina, I. Pérez, Luis Ramírez-Avilés Nov 2021

Ramon (Brosimun Alicastrum) Foliage As Supplement For Lactating Dual Purpose Cows, Carlos A. Sandoval-Castro, R. Cetina, I. Pérez, Luis Ramírez-Avilés

IGC Proceedings (1977-2023)

The objective of the present study was to asses the value of ramón (Brosimun alicastrum) foliage as a N-source in replacement of soybean-N in lactating dual purpose cows (Bos indicus x B. taurus). Four lactating cows were used in a latin rectangle design. Ramón was included to replace 0, 33, 66 and 100 % of the soybean-N contained in the supplement. Basal diet was fresh “Taiwán” a cultivar of Elephant grass (Pennisetum purpureum) fed ad libitum. Basal and total dry matter intake, digestibility (total fecal collection), saleable and calf suckled milk yields, and …

Go to article

Dry Matter Yield, In Vitro Digestibility, Protein And Fiber Composition Of 'Tifton 9' Bahiagrass (Paspalum Notatum) At Six Maturities, J. M. B. Vendramini, C. M. Haddad, Carlos G. S. Pedreira Nov 2021

Dry Matter Yield, In Vitro Digestibility, Protein And Fiber Composition Of 'Tifton 9' Bahiagrass (Paspalum Notatum) At Six Maturities, J. M. B. Vendramini, C. M. Haddad, Carlos G. S. Pedreira

IGC Proceedings (1977-2023)

The objective of this research was to evaluate dry matter yield, in vitro digestibility, and the concentrations of protein and cell wall components in 'Tifton 9’clipped at six maturities. Herbage was cut at the age of 20, 27, 34, 41, 48 and 55 days. The experimental design was a randomized complete block with six trataments (ages) and four replications. Dry matter yield and acid detergent fiber ranged from 188 g m-2, to 593 g m-2 and 386.9 g kg-1 to 375.1 g kg-1 respectively, with the cubic regression model having the best fit (P< 0.05). Concentrations of crude protein decreased linearly (P< 0.05) from 121 to 69 g kg-1. …

Go to article

In Situ Degradability Of Hand Harvested Or Extrusa Samples Of Tanzania Grass (Panicum Maximum, Jacq.), T. T. Berchielli, A. K. D. Salman, R. N. Silveira, W. V. B. Soares, J. R. Nogueira, S. N. Kronka Nov 2021

In Situ Degradability Of Hand Harvested Or Extrusa Samples Of Tanzania Grass (Panicum Maximum, Jacq.), T. T. Berchielli, A. K. D. Salman, R. N. Silveira, W. V. B. Soares, J. R. Nogueira, S. N. Kronka

IGC Proceedings (1977-2023)

In order to compare the in situ degradability of tanzania grass samples obtained as by extrusa or hand plucked, three ruminal fistulated cows were used in a completely randomized block design with split-plot scheme. Five grams of extrusa or hand harvested grasses were placed in nylon bags rumen incubated during 3, 6, 12, 24, 48, 96 and 120 hours. The degradability of DM, CP, NDF and ADF were, in this sequence, 62.59, 80.88, 50.73 and 46.65%, for hand harvested grass; and 79.53, 90.97, 71.21 and 65.68%, for extrusa. In situ degradability data of hand harvested samples were not reliable.

Go to article

Herbivore Preference For Afternoon- And Morning-Cut Forages And Adoption Of Cutting Management Strategies, H. F. Mayland, J. C. Burns, D. S. Fisher, Glenn E. Shewmaker, R. Carlstrom, D. S. Cash Nov 2021

Herbivore Preference For Afternoon- And Morning-Cut Forages And Adoption Of Cutting Management Strategies, H. F. Mayland, J. C. Burns, D. S. Fisher, Glenn E. Shewmaker, R. Carlstrom, D. S. Cash

IGC Proceedings (1977-2023)

Photosynthesizing forage plants accumulate total nonstructural carbohydrates (TNC) during daylight, but then TNC concentrations are reduced during the night. Afternoon-cut forage (PM) has greater TNC value and thus economic value, than morning-cut (AM). Livestock prefer PM-cut hay and this can be readily demonstrated by offering animals a choice of hays cut in PM and AM. Alfalfa growers in the western United States are readily adopting PM-cutting technology to increase profits.

Go to article

Near Infra-Red Measurement Of Nonstructural Carbohydrates In Alfalfa Hay, H. F. Mayland, J. C. Burns, D. S. Fisher, Glenn E. Shewmaker Nov 2021

Near Infra-Red Measurement Of Nonstructural Carbohydrates In Alfalfa Hay, H. F. Mayland, J. C. Burns, D. S. Fisher, Glenn E. Shewmaker

IGC Proceedings (1977-2023)

Recently documented benefits from afternoon versus morning cut forage have encouraged laboratory reporting of total nonstructural carbohydrate (TNC) values as part of forage quality testing. Our objective was to determine if infra-red spectroscopy (NIRS), which is being used in many forage testing labs, could be reliably used to quantify forage sugars in hay samples. We used two alfalfa (Medicago sativa L.) sample populations that were analyzed by wet chemistry for sugars and scanned by NIRS. The first set consisted of field-dried hay samples that were oven dried at 70oC and the second consisted of fresh, freeze-dried samples. …

Go to article

Character And Fitness For Leadership: Educating Lawyers For Compassion And Courage As Well As Brains- The Wizard Of Oz Was Right, R. Lisle Baker Nov 2021

Character And Fitness For Leadership: Educating Lawyers For Compassion And Courage As Well As Brains- The Wizard Of Oz Was Right, R. Lisle Baker

Tennessee Journal of Law and Policy

No abstract provided.

Go to article

Controlling The Timing Of Therapeutic Delivery To Enhance Regenerative Medicine Strategies, Cathal Kearney Nov 2021

Controlling The Timing Of Therapeutic Delivery To Enhance Regenerative Medicine Strategies, Cathal Kearney

Amgen Seminar Series in Chemical Engineering

Engineering tools to understand and mimic natural cue timing motivates the central research themes in the Kearney Lab: the precise temporal control of local therapeutic delivery; the effect of therapeutic delivery timing on efficacy; and integrating these platforms within biomaterials. This talk will cover several technologies developed in the Lab and their testing and application. By developing technologies to deliver therapeutics at specific time-points, we can probe the role of timing in repair processes and aim to ultimately drive coordination of biological processes. Designing novel tissue engineering scaffolds and integrating these delivery systems in them is a key parallel focus …

Go to article

The N-Terminus Of Mif Controls The Flexibility Of Specific Β-Sheet Residues Resulting In Dynamic Regulation Of Cd74 Activation, Georgios Pantouris Nov 2021

The N-Terminus Of Mif Controls The Flexibility Of Specific Β-Sheet Residues Resulting In Dynamic Regulation Of Cd74 Activation, Georgios Pantouris

Faculty Showcase

Macrophage migration inhibitory factor (MIF) is a pleiotropic protein with catalytic, CD74, CXCR2, CXCR4, and nuclease activities that contribute to the pathology of various inflammatory disorders, cardiovascular diseases, and cancer. The majority of MIF-triggered pathological conditions are associated with the activation of CD74, MIF’s cell surface receptor. The mechanistic details of MIF-induced activation of CD74 were mostly unknown until recently where it was shown that intramolecular dynamic signals transmitted from an allosteric center regulate the CD74activation site on MIF’s surface. Via backbone dynamic signals, the same center also controls the enzymatic pocket of MIF and more specifically the catalytically active …

Go to article

Metabolic Responses To Prolonged Fasting In A Naturally Obese Marine Mammal, Jane Khudyakov Nov 2021

Metabolic Responses To Prolonged Fasting In A Naturally Obese Marine Mammal, Jane Khudyakov

Faculty Showcase

Many animals undergo fasting in order to survive during periods of severe weather, food scarcity, migration, or reproduction. While most animals decrease their metabolism while fasting, northern elephant seals fast for several months while undergoing energy-intensive activities such as molting and reproduction. Seals fuel their energy needs with large fat stores that they accumulate while foraging at sea, resembling human patients with diabetes and obesity (insulin sensitivity, high levels of glucose and fat) while fasting. While some of the hormone signals involved in fasting have been identified, the molecular mechanisms that regulate healthy metabolic adaptations to fasting in seals are …

Go to article

Evaluation Of The Effectiveness Of Aeration During Washing To Dislodge Microorganisms From Cucumbers And Bell Peppers, Julysa Benitez Nov 2021

Evaluation Of The Effectiveness Of Aeration During Washing To Dislodge Microorganisms From Cucumbers And Bell Peppers, Julysa Benitez

LSU Master's Theses

Microorganisms may attach firmly to produce matrices and could affect the efficacy of disinfectants. The purpose of this study is to evaluate the effectiveness of aeration to reduce microbial risk during washing and sanitizing of fresh produce. Bell peppers and cucumbers were spot inoculated with Listeria innocua, E. coli O157:H7, and Salmonella; after drying in the biosafety cabinet for 1h, these were washed with water or sanitized with 100 ppm of chlorine for 3 min with or without aeration. Bell pepper and cucumber samples were placed in sterile bags with PBS after treatment. Bell peppers were processed in the stomacher …

Go to article

Corn Nitrogen Management Under Different Tillage Systems, Akshara Athelly Nov 2021

Corn Nitrogen Management Under Different Tillage Systems, Akshara Athelly

LSU Master's Theses

Adoption of no-tillage (NT) and cover crops (CC) significantly effect soil physicochemical properties and nutrient cycling that necessitates modified nutrient management to maximize crop yields. Two field experiments were conducted to evaluate N-sources Urea Ammonium Nitrate (UAN), urea, and urea+ N-stabilizer (urea+ stab) and N-split applications 100%N at V2 (S1), 25%N at V2+75%N at V6 (S2), 25%N at V2+ 50%N at V6+ 25%N at VT (S3) in a sandy loam soil and three CC wheat (Triticum aestivum), hairy vetch (Vicia villosa) , and radish (Raphanus sativus) and their combinations along with three N-rates ( …

Go to article

Intake And Qualitative Aspects Of Guinea Grass Grazed By Sheep Over Three Different Seasons, Willem A. Van Niekerk Nov 2021

Intake And Qualitative Aspects Of Guinea Grass Grazed By Sheep Over Three Different Seasons, Willem A. Van Niekerk

IGC Proceedings (1977-2023)

The objective of this study was to determine the influence of season on intake by sheep as well as certain selected qualitative characteristics of Panicum maximum (cv Gatton) (Guinea grass) at the mature growing stage. The lower DM content of the spring and summer grass (41.6 and 40.2%) did not hamper DOMI (48.1 and 26.7 W0.75/d), respectively. The N concentration of the spring and summer grass was well within the limit required for optimal rumen microbial production (1.8 - 2.0%). The high cell wall components of the winter grass resulted most probably in a significant lower IVDOM value …

Go to article

Identification And Quantification Of N-Alkanes In Three Tropical Grasses, T. C. M. Genro, Ê. R. Prates, L. R. L. De S. Thiago, M. Herrero, V. Sabatel Nov 2021

Identification And Quantification Of N-Alkanes In Three Tropical Grasses, T. C. M. Genro, Ê. R. Prates, L. R. L. De S. Thiago, M. Herrero, V. Sabatel

IGC Proceedings (1977-2023)

The main goal of this paper was to quantify the profile of n-alkanes in three tropical grasses. Hand plucking samples to simulate grazing were taking from Brachiaria brizantha cv. Marandu, Panicum maximum cv. Mombaça and Pennisetum purpureum cv. Cameroon. These samples were collected from an experiment established to assess intensive beef production from grasses throughout the year, under rotational grazing. Rotation order through the paddocks remained constant, with 30 days of rest after each grazing bout (16 paddocks, 2 days of grazing). Profiles of n-alkanes were analysed in three separate periods of the year: in the middle of the dry …

Go to article

Determination Of N-Alkanes At Different Stratum Heights In A Pasture Of Panicum Maximum Cv. Mombaça, T. C. M. Genro, L. R. L. De S. Thiago, Ê. R. Prates, M. Herrero, V. Sabatel Nov 2021

Determination Of N-Alkanes At Different Stratum Heights In A Pasture Of Panicum Maximum Cv. Mombaça, T. C. M. Genro, L. R. L. De S. Thiago, Ê. R. Prates, M. Herrero, V. Sabatel

IGC Proceedings (1977-2023)

The aim of this experiment was to determine n-alkane levels in the stem + leaf sheath and leaf blade components of a pasture of Panicum maximum cv. Mombaça, harvested in 20 cm stratified layers. This pasture was under rotational grazing for intensive beef production throughout the year. The grazing system was based on the use of 16 paddocks with a 2-day grazing period followed by a 30-day resting period. Profiles of n-alkanes were determined in samples harvested in three separate periods: in the middle of the dry season (August 97; PERIOD 1), at the beginning of the wet season (November …

Go to article

Observation Of Bundle Sheath Digestion Of Panicum Maximum Jacq,, B. Lempp, Valéria P. B. Euclides, Maria Da Graça Morais, D. M. Victor Nov 2021

Observation Of Bundle Sheath Digestion Of Panicum Maximum Jacq,, B. Lempp, Valéria P. B. Euclides, Maria Da Graça Morais, D. M. Victor

IGC Proceedings (1977-2023)

Cross-sections of available forage and extrusa fractions of leaf blades of Tanzânia-1, Mombaça and Massai grasses were evaluated for anatomic structure and observations of residue of in vitro digestibility. The observations showed greater frequency of scherenchyma girders in leaf blades of cv Massai, compared with order grasses. Tanzânia-1 and Mombaça residues were more susceptible to digestion, while Massai presented more frequently scherenchyma girders associated with less digestible bundle sheath.

Go to article

First Prev Next Last