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206,554 full-text articles. Page 10 of 5269.

An Examination Of Heir Property, The 1980 Emergency Land Fund Study, And Analysis Of Factors That Influence African American Farmers' Actions Related To Farmland, Roy W. Copeland 2019 Langdale College of Business Administration, Valdosta State University

An Examination Of Heir Property, The 1980 Emergency Land Fund Study, And Analysis Of Factors That Influence African American Farmers' Actions Related To Farmland, Roy W. Copeland

Professional Agricultural Workers Journal

Abstract

The study focused on heir property and analyzing African American farmers continuing in farming and dealing with clouded title. It specifically assessed the main issues raised by the 1980 Emergency Land Fund’s (ELF) study. It also surveyed a sample of African American farmers on heir property and related issues. It used descriptive statistics and logistic regression analysis to analyze the data. It found that 35% of respondents had a portion of their farms (50% or less) on heir property. This study reasonably confirms ELF’s findings on the percentage of African American-owned land held as heir property. Also ...


Barriers To Management Intensive Grazing By Southern Dairy Farmers, Mohammed Ibrahim, Nalini K. Pattanaik, Brian Cornish 2019 Fort Valley State University

Barriers To Management Intensive Grazing By Southern Dairy Farmers, Mohammed Ibrahim, Nalini K. Pattanaik, Brian Cornish

Professional Agricultural Workers Journal

Abstract

Interest in Management Intensive Grazing (MIG) [a situation where grazing animals are moved to a fresh pasture every few days in order to have access to adequate forage] practices by farmers have increased steadily over the years. Many research publications on grazing advocate the financial and environmental benefits of grazing. Understanding the challenges of MIG can be an important piece of information for a dairy farmer. A survey was conducted to determine how farmers in the southeastern region perceive the barriers to the adoption of MIG. A greater percentage of MIG southeastern farmers were satisfied or very satisfied with ...


A Retrospective Study Of Epa's Record Of Decision Report On The Woolfolk Arsenic And Lead Contamination In Fort Valley, Georgia, Ovigueroye L. Ojarikre, Oreta Samples, Jacques Surrency 2019 Fort Valley State University

A Retrospective Study Of Epa's Record Of Decision Report On The Woolfolk Arsenic And Lead Contamination In Fort Valley, Georgia, Ovigueroye L. Ojarikre, Oreta Samples, Jacques Surrency

Professional Agricultural Workers Journal

Abstract

Heavy metal contamination is a major anthropogenic challenge in communities with heavy presence of chemical industries. Most of the contamination is due to the improper disposal of chemical waste. The study involved the evaluation of the levels of arsenic and lead regarding remediation activities carried out by the Environmental Protection Agency (EPA). It compared the results of the EPA’s 1993 soil analysis of arsenic and lead, and a subsequent soil analysis of the same mapped areas. It also covered the evaluation of the level of arsenic dust in the attics of residential properties and evaluation of the EPA ...


Production Period Of Different Browse Species Suitable For Grazing Small Ruminants, Bidur Paneru, Uma Karki, Shailes Bhattrai, Nevershi Ellis 2019 Tuskegee University

Production Period Of Different Browse Species Suitable For Grazing Small Ruminants, Bidur Paneru, Uma Karki, Shailes Bhattrai, Nevershi Ellis

Professional Agricultural Workers Journal

Abstract

Browse (shrubs, trees, and vines) species are important sources of feed for small ruminants in Alabama and many other states of the U.S. Information on the production period of these species is important to prepare a year-round grazing plan to utilize them well. The objective of the study was to determine the leaf-shedding time of common browse species suitable for small ruminants. This study was conducted at the Atkins Agroforestry and Browse Research and Demonstration Site of Tuskegee University, Alabama. Ten samples of each browse species were tagged, and leaf-yellowing and leaf-fall data collected using photoplots every 14 ...


Insect Population Dynamics, Varietal Preference And Performance Of Organic Bio-Pesticides, Anitha Chitturi, Jeanine Davis, Margaret Bloomquist, Franklin Quarcoo, Kokoasse Kpomblekou-A, Desmond Mortley 2019 Tuskegee University

Insect Population Dynamics, Varietal Preference And Performance Of Organic Bio-Pesticides, Anitha Chitturi, Jeanine Davis, Margaret Bloomquist, Franklin Quarcoo, Kokoasse Kpomblekou-A, Desmond Mortley

Professional Agricultural Workers Journal

Abstract

Organic farming prohibits use of synthetic agrochemicals and encourages use of Integrated Pest Management (IPM) methods. States in the Southeastern US generally lag behind the rest of the country in organic vegetable production partly because of high insect pressures that make it difficult to grow vegetables without pesticides. This study on summer squash (Cucurbita pepo), grown using organic management practices, was conducted at a research station located in Mills River, North Carolina. The objectives of the study were to assess insect population dynamics and to evaluate performance of three OMRI-approved bio-pesticides: Azadirachtin, Pyrethrin and Spinosad against major insect pests ...


Abridged Submission Guidelines, 2019 Tuskegee University

Abridged Submission Guidelines

Professional Agricultural Workers Journal

No abstract provided.


A Potential Role For Phenotypic Plasticity In Invasions And Declines Of Social Insects, Fabio Manfredini, Marina Arbetman, Amy L. Toth 2019 University of London, Egham

A Potential Role For Phenotypic Plasticity In Invasions And Declines Of Social Insects, Fabio Manfredini, Marina Arbetman, Amy L. Toth

Ecology, Evolution and Organismal Biology Publications

Eusociality, a form of animal social organization involving sterile and reproductive castes, is a rare, but highly ecologically successful form of life. There are striking examples of eusocial species with populations that are ecologically dominant in their native ranges, as well as remarkably successful globally as invasive species; prominent examples include fire ants and yellowjacket wasps. At the same time, there have been startling population declines in other social insects, notably bumble bees. Here, we explore the possible role of phenotypic plasticity in invasion biology and declines of social insect species. This topic is of particular interest, because social insects ...


Theoretical Studies Of Ir And Nmr Spectral Changes Induced By Sigma-Hole Hydrogen, Halogen, Chalcogen, Pnicogen, And Tetrel Bonds In A Model Protein Environment, Mariusz Michalczyk, Wiktor Zierkiewicz, Rafał Wysokiński, Steve Scheiner 2019 Wrocław University of Science and Technology

Theoretical Studies Of Ir And Nmr Spectral Changes Induced By Sigma-Hole Hydrogen, Halogen, Chalcogen, Pnicogen, And Tetrel Bonds In A Model Protein Environment, Mariusz Michalczyk, Wiktor Zierkiewicz, Rafał Wysokiński, Steve Scheiner

Steve Scheiner

Various types of σ-hole bond complexes were formed with FX, HFY, H2FZ, and H3FT (X = Cl, Br, I; Y = S, Se, Te; Z = P, As, Sb; T = Si, Ge, Sn) as Lewis acid. In order to examine their interactions with a protein, N-methylacetamide (NMA), a model of the peptide linkage was used as the base. These noncovalent bonds were compared by computational means with H-bonds formed by NMA with XH molecules (X = F, Cl, Br, I). In all cases, the A–F bond, which lies opposite the base and is responsible for the σ-hole on the ...


Synthesis And Evaluation Of Novel Silica Hydride-Based Stationary Phases For Bioanalytical Applications, Seiichiro Watanabe 2019 San José State University

Synthesis And Evaluation Of Novel Silica Hydride-Based Stationary Phases For Bioanalytical Applications, Seiichiro Watanabe

Seiichiro Watanabe

Most HPLC columns are packed with silanol (Si-OH)-rich type-B silica that often
participates in undesired electrostatic interactions with sample solutes and produces a poor analyte peak shape. These silanols are also known to facilitate the surface hydration required for HILIC mode to retain polar analytes. However, the hydrated surface composition can easily fluctuate, which results in poor reproducibility and requires a lengthy equilibration step. In this study, four novel stationary phases have been developed by using the TYPE-CTM silica material, in which up to 95% of the surface silanols have been replaced with Si-H group. One of the advantages ...


Micrornas Are Necessary For Bmp-7-Induced Dendritic Growth In Cultured Rat Sympathetic Neurons, Vidya Chandrasekaran 2019 Saint Mary's College of California

Micrornas Are Necessary For Bmp-7-Induced Dendritic Growth In Cultured Rat Sympathetic Neurons, Vidya Chandrasekaran

Vidya Chandrasekaran

Neuronal connectivity is dependent on size and shape of the dendritic arbor. However, mechanisms controlling dendritic arborization, especially in the peripheral nervous system, are not completely understood. Previous studies have shown that bone morphogenetic proteins (BMPs) are important initiators of dendritic growth in peripheral neurons. In this study, we examined the hypothesis that post-transcriptional regulation mediated by microRNAs (miRNAs) is necessary for BMP-7-induced dendritic growth in these neurons. To examine the role of miRNAs in BMP-7-induced dendritic growth, microarray analyses was used to profile miRNA expression in cultured sympathetic neurons from the superior cervical ganglia of embryonic day 21 rat ...


Scientific Considerations For Acidification Monitoring In The Us Mid-Atlantic Region, KA Goldsmith, S Lau, et al, EH Shadwick, et al 2019 Virginia Institute of Marine Science

Scientific Considerations For Acidification Monitoring In The Us Mid-Atlantic Region, Ka Goldsmith, S Lau, Et Al, Eh Shadwick, Et Al

VIMS Articles

Coastal and ocean acidification has the potential to cause significant environmental and societal impacts. Monitoring carbonate chemistry parameters over spatial and temporal scales is challenging, especially with limited resources. A lack of monitoring data can lead to a limited understanding of real-world conditions. Without such data, robust experimental and model design is challenging, and the identification and understanding of episodic acidification events is nearly impossible. We present considerations for resource managers, academia, and industry professionals who are currently developing acidification monitoring programs in the Mid-Atlantic region. We highlight the following considerations for deliberation: 1) leverage existing infrastructure to include multiple ...


Impacts Of 40 Years Of Land Cover Change On Water Quality In Tampa Bay, Florida, Matthew J. McCarthy, Frank E. Muller-Karger, Daniel Otis, Pablo Méndez-Lázaro 2019 University of South Florida

Impacts Of 40 Years Of Land Cover Change On Water Quality In Tampa Bay, Florida, Matthew J. Mccarthy, Frank E. Muller-Karger, Daniel Otis, Pablo Méndez-Lázaro

Frank E. Muller-Karger

Land cover changes in the Tampa Bay watershed (Florida) over the past four decades were examined along with precipitation and wind observations to help understand causes of long-term changes in turbidity and chlorophyll concentration within the Tampa Bay estuary. Water quality showed a statistically significant relationship to land cover fraction in the watershed compared to long-term precipitation or wind stress. Redundancy Analyses with Akaike’s Information Criterion and non-parametric multiple regressions determined that turbidity and chlorophyll concentration decreased bay-wide from 1974–2012 with increased developed land fraction (R2 > 0.75, p-value < 0.05). Various segments of the estuary showed different significant responses to developed land (R2 > 0.75, p-value < 0.05), agricultural land (R2 > 0.93, p-value < 0.02), bare land (R2 = 0.77, p-value = 0.001), and wind stress (R2 = 0.91, p-value = 0.04) at different times of year.


Rapid Coastal Forest Decline In Florida's Big Bend, Matthew J. McCarthy, Benjamin Dimmitt, Frank E. Muller-Karger 2019 University of South Florida

Rapid Coastal Forest Decline In Florida's Big Bend, Matthew J. Mccarthy, Benjamin Dimmitt, Frank E. Muller-Karger

Frank E. Muller-Karger

Coastal ecosystems throughout the world are increasingly vulnerable to degradation as a result of accelerating sea-level rise and saltwater intrusion, more frequent and powerful extreme weather events, and anthropogenic impacts. Hardwood swamp forests in the Big Bend region of Florida’s Gulf of Mexico coast (USA) are largely devoid of the latter, but have degraded rapidly since the turn of the 21st Century. Photographs of the forest, collected on the ground since 2009, were used to guide an analysis of a 60 km2 study area using satellite images. The images confirm that the coastal forest area declined 0.60 ...


Seasonal Patterns In Phytoplankton Biomass Across The Northern And Deep Gulf Of Mexico: A Numerical Model Study, Fabian A. Gomez, Sang-Ki Lee, Frank J. Hernandez Jr, Frank E. Muller-Karger, John T. Lamkin 2019 University of Southern Mississippi

Seasonal Patterns In Phytoplankton Biomass Across The Northern And Deep Gulf Of Mexico: A Numerical Model Study, Fabian A. Gomez, Sang-Ki Lee, Frank J. Hernandez Jr, Frank E. Muller-Karger, John T. Lamkin

Frank E. Muller-Karger

Biogeochemical models that simulate realistic lower-trophic-level dynamics, including the representation of main phytoplankton and zooplankton functional groups, are valuable tools for improving our understanding of natural and anthropogenic disturbances in marine ecosystems. Previous three-dimensional biogeochemical modeling studies in the northern and deep Gulf of Mexico (GoM) have used only one phytoplankton and one zooplankton type. To advance our modeling capability of the GoM ecosystem and to investigate the dominant spatial and seasonal patterns of phytoplankton biomass, we configured a 13-component biogeochemical model that explicitly represents nanophytoplankton, diatoms, micro-, and mesozooplankton. Our model outputs compare reasonably well with observed patterns in ...


Water Quality Drivers In 11 Gulf Of Mexico Estuaries, Matthew J. McCarthy, Daniel Otis, Pablo Méndez-Lázaro, Frank Muller-Karger 2019 University of South Florida

Water Quality Drivers In 11 Gulf Of Mexico Estuaries, Matthew J. Mccarthy, Daniel Otis, Pablo Méndez-Lázaro, Frank Muller-Karger

Frank E. Muller-Karger

Coastal water-quality is both a primary driver and also a consequence of coastal ecosystem health. Turbidity, a measure of dissolved and particulate water-quality matter, is a proxy for water quality, and varies on daily to interannual periods. Turbidity is influenced by a variety of factors, including algal particles, colored dissolved organic matter, and suspended sediments. Identifying which factors drive trends and extreme events in turbidity in an estuary helps environmental managers and decision makers plan for and mitigate against water-quality issues. Efforts to do so on large spatial scales have been hampered due to limitations of turbidity data, including coarse ...


Remote Sensing Estimation Of Surface Oil Volume During The 2010 Deepwater Horizon Oil Blowout In The Gulf Of Mexico: Scaling Up Aviris Observations With Modis Measurements, Chuanmin Hu, Lian Feng, Jamie Holmes, Gregg A. Swayze, Ira Leifer, Christopher Melton, Oscar Garcia, Ian MacDonald, Mark Hess, Frank E. Muller-Karger, George Graettinger, Rebecca Green 2019 University of South Florida

Remote Sensing Estimation Of Surface Oil Volume During The 2010 Deepwater Horizon Oil Blowout In The Gulf Of Mexico: Scaling Up Aviris Observations With Modis Measurements, Chuanmin Hu, Lian Feng, Jamie Holmes, Gregg A. Swayze, Ira Leifer, Christopher Melton, Oscar Garcia, Ian Macdonald, Mark Hess, Frank E. Muller-Karger, George Graettinger, Rebecca Green

Frank E. Muller-Karger

The Deepwater Horizon (DWH) oil blowout in the Gulf of Mexico (GoM) led to the largest offshore oil spill in U.S. history. The accident resulted in oil slicks that covered between 10,000 and upward of 40,000  km2 of the Gulf between April and July 2010. Quantifying the actual spatial extent of oil over such synoptic scales on an operational basis and, in particular, estimating the oil volume (or slick thickness) of large oil slicks on the ocean surface has proven to be a challenge to researchers and responders alike. This challenge must be addressed to assess ...


Materials Collected By The Southern Branch Of The Uc Africa Expedition With A Report On Previously Unpublished Plio-Pleistocene Fossil Localities, Tesla A. Monson, Marianne F. Brasil, Leslea J. Hlusko 2019 UC Berkeley

Materials Collected By The Southern Branch Of The Uc Africa Expedition With A Report On Previously Unpublished Plio-Pleistocene Fossil Localities, Tesla A. Monson, Marianne F. Brasil, Leslea J. Hlusko

Tesla Monson

From 1947 to 1948, paleontologists from the University of California Museum of Paleontology (UCMP), Charles Camp and Frank Peabody, led the southern branch of the University of California’s Africa Expedition. While in South Africa, Camp and Peabody collected thousands of specimens excavated from more than 70 sites, 40 of which make up the Plio-Pleistocene South African assemblage at the UCMP. Materials collected by researchers accompanying the expedition are held at numerous repositories on the University of California Berkeley campus including the UCMP, the Museum of Vertebrate Zoology (MVZ), the Phoebe A. Hearst Museum of Anthropology and the University of ...


Why We Can’T Solve The Opioid Problem, Wayne F. Coombs, Ph.D. 2019 None

Why We Can’T Solve The Opioid Problem, Wayne F. Coombs, Ph.D.

Journal of Appalachian Health

Appalachia’s opioid epidemic is a complex, systemic problem being addressed by limited intervention processes conceptualized through narrow disciplinary models that are not working. We need a new comprehensive, collaborative approach if we ever hope to find solutions to this problem.


2019 Student Center For Science Engagement Research Symposium Program, Student Center for Science Engagement 2019 Northeastern Illinois University

2019 Student Center For Science Engagement Research Symposium Program, Student Center For Science Engagement

Student Center for Science Engagement Research Symposium

It gives me great pleasure to welcome you to the 11th Annual SCSE Research Symposium. In just over a decade, undergraduate summer research in the sciences at Northeastern Illinois University has grown from a few groups of students working with faculty mentors within their departments, to a robust, structured summer research program with dozens of students working with faculty across the STEM disciplines at NEIU. The presentations at the symposium today will give you all an appreciation of the breadth and depth of the scientific questions that our students have been investigating all summer. To our students presenting their work ...


An Animal-Assisted Intervention Study In The Nursing Home: Lessons Learned, Lonneke G. J. A. Schuurmans, Inge Noback, Jos M. G. A. Schols, Marie-Jose Enders-Slegers 2019 Open University, The Netherlands

An Animal-Assisted Intervention Study In The Nursing Home: Lessons Learned, Lonneke G. J. A. Schuurmans, Inge Noback, Jos M. G. A. Schols, Marie-Jose Enders-Slegers

People and Animals: The International Journal of Research and Practice

AAI studies in the nursing home pose a specific set of challenges. In this article the practical and ethical issues encountered during a Dutch psychogeriatric nursing home AAI study are addressed with the aim of sharing our experiences for future researchers as well as AAI practitioners in general.

In our study we compared three groups of clients with dementia who participated in group sessions of either visiting dog teams, visiting FurReal Friend robot animals, or visiting students (control group) and monitored the effect on social interaction and neuropsychiatric symptoms through video analysis and questionnaires. We encountered the following four categories ...


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