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

Life Sciences Commons

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

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1 - 30 of 80533

Full-Text Articles in Life Sciences

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

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

Bulletin of the Southern California Academy of Sciences

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


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

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

Mahendra Kumar Trivedi

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


Phytochemical Analysis And Biological Activities Of Cola Nitida Bark, Durand Dah-Nouvlessounon, Laboratoire Baebib, Ufr-Svt, University Of Ouagadougou, Mamoudou H. Dicko Prof., Lamine Baba-Moussa Jan 2031

Phytochemical Analysis And Biological Activities Of Cola Nitida Bark, Durand Dah-Nouvlessounon, Laboratoire Baebib, Ufr-Svt, University Of Ouagadougou, Mamoudou H. Dicko Prof., Lamine Baba-Moussa

Pr. Mamoudou H. DICKO, PhD

The aim of this study is to investigate some biological effects of Cola nitida’s bark after phytochemical screening. The bark was collected, dried, and then powdered for the phytochemical screening and extractions. Ethanol and ethyl acetate extracts of C. nitida were used in this study. The antibacterial activity was tested on ten reference strains and 28 meat isolated Staphylococcus strains by disc diffusionmethod. The antifungal activity of three fungal strains was determined on the Potato-Dextrose Agar medium mixed with the appropriate extract. The antioxidant activity was determined by DPPH and ABTS methods. Our data revealed the presence of various ...


Prospective Doctoral Statement For The University Of Southern California's School Of Cinematic Arts Media Arts + Practice Program, Gabriel Leiner Aug 2016

Prospective Doctoral Statement For The University Of Southern California's School Of Cinematic Arts Media Arts + Practice Program, Gabriel Leiner

Gabriel Leiner

After visiting L.A. again and seeing the beautiful fountains on the University of Southern California's campus I am filled with all kinds of ideas about the future and brimming with energy. To all those at the University of Southern California's Cinematic Arts Department, thanks for reading my ideas over the past couple years and helping me to evolve and become a better person and a better writer. Starting a position as a doctoral student in the Media Arts + Practice Program in 2016 is an exciting opportunity. I've got a really positive outlook about Kiss The Water.


Investigating Genetic Differences Between Strains Of Janthinobacterium Lividum On Salamanders And In Their Environment, Rhiannon E. Black Aug 2016

Investigating Genetic Differences Between Strains Of Janthinobacterium Lividum On Salamanders And In Their Environment, Rhiannon E. Black

University of Tennessee Honors Thesis Projects

No abstract provided.


Iowa State Research Farm Reports Available To Public, Mark S. Honeyman Dec 2015

Iowa State Research Farm Reports Available To Public, Mark S. Honeyman

Integrated Crop Management News

There are fourteen Iowa State University Research and Demonstration Farms in Iowa; nine owned by associations (local farmers) and five owned by the university. One responsibility of Iowa State to the associations is to provide an annual farm progress report on the agricultural research and related scientific agriculture activities conducted at the farm as a year-end summary. Those reports, that were made available in the past to the members and others in print form, are now available online to the public athttp://fpr.extension.iastate.edu/ in a new format.


Certified Crop Adviser Exam Review Course Offered By Isu Extension, Brent A. Pringnitz Dec 2015

Certified Crop Adviser Exam Review Course Offered By Isu Extension, Brent A. Pringnitz

Integrated Crop Management News

Individuals planning to become a Certified Crop Adviser (CCA) can attend a two-day ISU Extension course to assist with exam preparation. ISU extension specialists will cover the performance objectives for the exam and provide additional assistance on topic areas of most concern to students. Students will take interactive quizzes during the course and finish with a practice examination.


Confinement Site Manure Applicator Workshops Scheduled For 2011, Angela M. Rieck-Hinz Dec 2015

Confinement Site Manure Applicator Workshops Scheduled For 2011, Angela M. Rieck-Hinz

Integrated Crop Management News

Confinement site manure applicators and anyone interested in learning about manure issues should plan to attend a two-hour workshop offered by Iowa State University (ISU) Extension in January or February 2011. These workshops are offered in cooperation with the Iowa Department of Natural Resources (DNR). There is no fee to attend the workshops, but applicators will need to pay certification fees to complete certification requirements.


Commercial Manure Applicator Training Scheduled For Jan. 6, 2011, Angela M. Rieck-Hinz Dec 2015

Commercial Manure Applicator Training Scheduled For Jan. 6, 2011, Angela M. Rieck-Hinz

Integrated Crop Management News

Commercial manure applicators can attend three hours of training on Thursday, Jan. 6, 2011, to meet annual commercial manure applicator certification requirements. Iowa State University (ISU) Extension and the Iowa Department of Natural Resources (DNR) will conduct Commercial Manure Applicator training from 9 a.m. to noon at 75 locations in Iowa, and four locations in surrounding states. Registration begins at 8:30 a.m. There is no fee for the workshop but applicators must register by Dec. 30 with the ISU Extension county office where they plan to attend. A complete list of county extension offices offering this workshop ...


Short Term Effectiveness Of High Density Large Woody Debris In Asotin Creek As A Cheap And Cheerful Restoration Restoration Action, Reid Camp Dec 2015

Short Term Effectiveness Of High Density Large Woody Debris In Asotin Creek As A Cheap And Cheerful Restoration Restoration Action, Reid Camp

All Graduate Theses and Dissertations

In response to human impacts, river restoration and rehabilitation actions have become a priority in the United States. In the Pacific Northwest, most restoration actions are focused on repairing degraded freshwater habitat to increase or improve Pacific salmonid production. However, traditional river restoration actions remained largely unchanged for over 100 years despite a lack of definitive evidence that the actions were effective. More recently, there has been a surge in process-based restoration actions, which aim to reestablish the physical and biological processes that maintain fluvial and floodplain environments by targeting the root causes of degradation in a watershed. Cheap and ...


Gut Microbiota Of Migratory Passerines At Stopover, William Bagley Lewis Dec 2015

Gut Microbiota Of Migratory Passerines At Stopover, William Bagley Lewis

Master's Theses

Although the gut microbiota provides many beneficial functions to animal hosts, relatively little is known about the gut microbiota of passerines. It is likely that gut microbes are especially important during the migratory phase; however gut atrophy experienced during prolonged migratory flight may cause disruptions of the stable microbiota. Fecal samples were collected from several species of passerine after crossing the Gulf of Mexico during spring migration and before crossing during fall, and microbiota communities were analyzed using next-generation sequencing. Despite showing large inter-individual variation, a core microbiota composed largely of Firmicutes and Proteobacteria was identified in all birds. Microbiota ...


Community Scholars Program - Hopkins County, Kentucky (Fa 736), Manuscripts & Folklife Archives Dec 2015

Community Scholars Program - Hopkins County, Kentucky (Fa 736), Manuscripts & Folklife Archives

FA Finding Aids

Finding aid only for Folklife Archives Project 736. This collection contains information and documentation about the Community Scholars Program’s workshops held in Hopkins County, Kentucky during the summer of 2008. The collection chiefly consists of projects completed by program participants.


Improving The Odds: Assessing Bait Availability Before Rodent Eradications To Aid In Selecting Bait Application Rates, Madeleine Pott, Alexander S. Wegmann, Richard Griffiths, Araceli Samaniego-Herrera, Richard J. Cuthbert, M. De L. Brooke, William C. Pitt, Are R. Berentsen, Nick D. Holmes, Gregg R. Howald, Karina Ramos-Rendon, James C. Russell Nov 2015

Improving The Odds: Assessing Bait Availability Before Rodent Eradications To Aid In Selecting Bait Application Rates, Madeleine Pott, Alexander S. Wegmann, Richard Griffiths, Araceli Samaniego-Herrera, Richard J. Cuthbert, M. De L. Brooke, William C. Pitt, Are R. Berentsen, Nick D. Holmes, Gregg R. Howald, Karina Ramos-Rendon, James C. Russell

USDA National Wildlife Research Center - Staff Publications

Rodent eradications undertaken on tropical islands are more likely to fail than eradications undertaken at higher latitudes. We report on 12 independent rodent eradication projects undertaken on tropical islands that utilized the results of an in situ bait availability study prior to eradication to inform, a priori, the bait application rate selected for the eradication. These projects also monitored bait availability during the eradication. The results from our analysis verified the utility of bait availability studies to future rodent eradication campaigns and confirmed the influence of two environmental factors that can affect bait availability over time: precipitation prior to the ...


Cold Plasma Inactivation Of Internalised Bacteria And Biofilms For Salmonella Enterica Serovar Typhimurium, Listeria Monocytogenes And Escherichia Coli, Dana Ziuzina, Lu Han, Patrick J. Cullen, Paula Bourke Oct 2015

Cold Plasma Inactivation Of Internalised Bacteria And Biofilms For Salmonella Enterica Serovar Typhimurium, Listeria Monocytogenes And Escherichia Coli, Dana Ziuzina, Lu Han, Patrick J. Cullen, Paula Bourke

Articles

Microbial biofilms and bacteria internalised in produce tissue may reduce the effectiveness of decontamination methods. In this study, the inactivation efficacy of in-package atmospheric cold plasma (ACP) afterglow was investigated against Salmonella Typhimurium, Listeria monocytogenes and Escherichia coli in the forms of planktonic cultures, biofilms formed on lettuce and associated bacteria internalised in lettuce tissue. Prepared lettuce broth (3%) was inoculated with bacteria resulting in a final concentration of ~ 7.0 log10 CFU/ml. For biofilm formation and internalisation, lettuce pieces (5 × 5 cm) were dip-inoculated in bacterial suspension of ~ 7.0 log10 CFU/ml for 2 h ...


Big Data Proteogenomics And High Performance Computing: Challenges And Opportunities, Fahad Saeed Oct 2015

Big Data Proteogenomics And High Performance Computing: Challenges And Opportunities, Fahad Saeed

Parallel Computing and Data Science Lab Technical Reports

Proteogenomics is an emerging field of systems biology research at the intersection of proteomics and genomics. Two high-throughput technologies, Mass Spectrometry (MS) for proteomics and Next Generation Sequencing (NGS) machines for genomics are required to conduct proteogenomics studies. Independently both MS and NGS technologies are inflicted with data deluge which creates problems of storage, transfer, analysis and visualization. Integrating these big data sets (NGS+MS) for proteogenomics studies compounds all of the associated computational problems. Existing sequential algorithms for these proteogenomics datasets analysis are inadequate for big data and high performance computing (HPC) solutions are almost non-existent. The purpose of ...


Evaluating Sub-Lethal Effects Of Orchard-Applied Pyrethroids Using Video-Tracking Software To Quantify Honey Bee Behaviors, Erin M. Ingram, Julie Augustin, Marion D. Ellis, Blair Siegfried Sep 2015

Evaluating Sub-Lethal Effects Of Orchard-Applied Pyrethroids Using Video-Tracking Software To Quantify Honey Bee Behaviors, Erin M. Ingram, Julie Augustin, Marion D. Ellis, Blair Siegfried

Faculty Publications: Department of Entomology

Managed honey bee, Apis mellifera L., colonies are contracted to pollinate fruit and nut orchards improving crop quality and yield. Colonies placed in orchards are potentially exposed to pyrethroid insecticides used for broad-spectrum pest control. Pyrethroids have been reported to pose minimal risk to bees due to their low application rates in the field and putative repellent properties. This repellency is believed to alter foraging behavior with the benefit of preventing bees from encountering a lethal dose in the field. However, sub-lethal exposure to pyrethroids may adversely impact bee behavior potentially resulting in social dysfunction or disruption of foraging.

This ...


Community Involvement To Address A Long-Standing Invasive Species Problem: Aspects Of Civic Ecology In Practice, Rebecca W. Dolan, Kelly Harris, Mark Adler Sep 2015

Community Involvement To Address A Long-Standing Invasive Species Problem: Aspects Of Civic Ecology In Practice, Rebecca W. Dolan, Kelly Harris, Mark Adler

Scholarship and Professional Work - LAS

Invasive non-native species (INS) are found in every city around the globe, but their impacts in urban settings as biological agents of visual pollution that block views of natural landscapes and disconnect citizens from nature are not as often addressed as comprehensively as their impacts in natural areas or agricultural settings. The multiple impacts of INS in cities make them ideal candidates for aspects of Civic Ecology Practice, where local environmental stewardship action is taken to enhance green infrastructure and community well-being in urban and other human-dominated systems. We present details of a community driven program focused on removal of ...


Development Of Transgenic Lines To Support Plant Cell Biology Research, Kristin Kopperud Aug 2015

Development Of Transgenic Lines To Support Plant Cell Biology Research, Kristin Kopperud

Kaleidoscope

Viruses pose a threat to humans in a variety of ways — from direct infection to imposing devastating effects on the agriculture industry. Prevention of such infection requires knowledge of the mechanisms of viral infection, both in animal- and plant-infecting species. The goal of this project was to identify plant factors that interact with viral proteins in the course of infection leading to disease. Sonchus yellow net virus (SYNV) and Potato yellow dwarf virus (PYDV) were used to test the hypothesis that the viruses utilize different subsets of host factors in order to infect Nicotiana benthamiana, despite both being members of ...


The Agricultural Footprints On The Environment, Philip Houtz Aug 2015

The Agricultural Footprints On The Environment, Philip Houtz

Kaleidoscope

Industrialized agricultural systems have given America a convenient and affordable means to supply a surplus of food products to its citizens. Transgenic technology, synthesized fertilizers, advanced pesticides, concentrated animal feeding operations (CAFOs), and the use of farm machinery have all contributed to humanity’s ability to feed the world’s rapidly growing population. However, the energy-intensive food operation of today may not be as ideal as we assume. Fossil fuels are burned to meet the energy requirements for the continual production of large quantities of fertilizer and to keep farm machines operational. Fertilizer and pesticide runoff from farmland ultimately drains ...


How Iowa Stacks Up Under The 1996 Freedom To Farm Payments, Steven L. Elmore, Darnell B. Smith Aug 2015

How Iowa Stacks Up Under The 1996 Freedom To Farm Payments, Steven L. Elmore, Darnell B. Smith

Iowa Ag Review

Production Flexibility Contract (PFC) acres enrolled for fiscal year (FY) 1996 were released by USDA on August 19, 1996. From these data, and what we know about the payment stream, we calculated the payment rates by bushel, acre, and state. Total payments by state under the 1996 FALR Act were also calculated. These figures provide a comparison by state and commodity.


Iowa Farming: Evolving Risk And Risk Management, John D. Lawrence, Darnell B. Smith Aug 2015

Iowa Farming: Evolving Risk And Risk Management, John D. Lawrence, Darnell B. Smith

Iowa Ag Review

A prominem Iowa row-crop producer recently commented, "There isn't much risk to crop farming in Iowa today." Considering the floods of 1993, below nonnal yields in 1995, the changes in the federal farm income safety net, not to mention recent price volatility, this statement sounds odd at first glance. However, given the variety of marketing and risk management tools available, and the existing market conditions, midwestern farmers who manage carefully can hedge a great deal of shon run risk in a CQSt effective manner. Alternatively, livestock producers may be finding increasing risk due to volatile feed costs and weak ...


Will Freedom To Farm Harm The Environment?, Bruce A. Babcock Aug 2015

Will Freedom To Farm Harm The Environment?, Bruce A. Babcock

Iowa Ag Review

While the effects of the new farm program vary dramatically by location, overall environmental effects from the new legislation are small (primarily because key environmental provisions were continued in the new farm but). This conclusion appeared in a recent study (RAPS 1996: Agricultural and Environmental Outlooll) conducted by researchers at the Center for Agricultural and Rural Development (CARD), Iowa State University.


Would Revenue Insurance Have Paid During The 1993 Flood?, Chad Hart, Darnell B. Smith Aug 2015

Would Revenue Insurance Have Paid During The 1993 Flood?, Chad Hart, Darnell B. Smith

Iowa Ag Review

This year has seen the emergence of two new crop revenue insurance products: Income Protection (lP) and Crop Revenue Coverage (CRC). With emphasis on revenue, the new products depart from traditional multiple-peril crop insurance (MPCI), that provides protection only against yield shortfalls.


Agriculture's Next Ten Years: 1996 Iowa Baseline, Steven L. Elmore, Darnell B. Smith Aug 2015

Agriculture's Next Ten Years: 1996 Iowa Baseline, Steven L. Elmore, Darnell B. Smith

Iowa Ag Review

CARD's Iowa Outlook 1996-2005 consists of benchmark numbers used to determine how agricultural policies at the federal level affect local lowa farmers. The tenyear projections represent a composite of model results and judgments regarding future lowa, U.S., and international crop and livestock production, consumption, trade and prices. The baseline results are not a forecast, but rather represent a scenario conditional upon lowa, U.S., and international macroeconomic assumptions and continuation of current agricultural policies.


The Eu Export Tax: Impact On U.S. Markets, William H. Meyers, Steven L. Elmore Aug 2015

The Eu Export Tax: Impact On U.S. Markets, William H. Meyers, Steven L. Elmore

Iowa Ag Review

ln response to high world grain prices, the European Union (EU) introduced wheat export taxes in November 1995 for the first time in more than a decade. Normally, the EU offers export subsidies to make up the difference between their high internal grain prices and world market prices. However, EU internal support prices have been reduced over the last three years as a result of policy reforms. Recent high world grain prices have exceeded the EU support prices since early in the 1995/96 crop year. Rather than let internal prices follow world market prices upward, the EU decided to ...


The Impact Of 1996 Weather On Crop Markets, Steven L. Elmore, Darnell B. Smith, William H. Meyers Aug 2015

The Impact Of 1996 Weather On Crop Markets, Steven L. Elmore, Darnell B. Smith, William H. Meyers

Iowa Ag Review

Every summer the agricultural sector anticipates the harvest and speculates on how much grain will be produced. Ac; time passes, more information is gathered about probable yields, harvested area, and production in the U.S. and the rest of the northern hemisphere. The information this year may be more critical because of the current high crop prices and low stockholding situation.


Implications For U.S. Pork Trade Fouowing Taiwan's Export Ban, Jacinto F. Fabiosa, Frank H. Fuller Aug 2015

Implications For U.S. Pork Trade Fouowing Taiwan's Export Ban, Jacinto F. Fabiosa, Frank H. Fuller

Iowa Ag Review

Taiwan announced on Friday, March 21 , 1997, an indefinite ban on pork exports after an outbreak of foot and mouth disease. It is neither·clear at.this time how Jon!! the ban will ~ last nor the ful l impacts of this event. Although a terrible blow to Taiwanese producers. Iowa's primary agriculture will likely encounter increased demand, as the u:s. pork industry is well positioned to increase world market share. Iowa State University's FAPRI staff is engaged in analysis of this event.


Transportation Changes Increase Risks For Country Elevators, C. Phillip Baumel Aug 2015

Transportation Changes Increase Risks For Country Elevators, C. Phillip Baumel

Iowa Ag Review

Farmers face increasing price and output risk. The increased price risk stems from the reduction in and eventual elimination of flexible government payments, increased volatility in grain purchases by importing countries and virtual worldwide elimination of grain reserves. Increased output risk comes from changing weather patterns and elimination of government constraints on acres planted in certain crops.


Grains And Oilseed Cropland: A Global Perspective, James Rude, Steven L. Elmore, Darnell B. Smith Aug 2015

Grains And Oilseed Cropland: A Global Perspective, James Rude, Steven L. Elmore, Darnell B. Smith

Iowa Ag Review

Current tight grain markets have led some commentators to argue that the world is entering a phase of rising food scarcity. The present situation js related to the rise in world consumption, which has tended to outpace production during the 1990s. While most supply shortages were due to weather shocks, the global area planted to grains has decreased from 1,784 million acres in l 980to 1,718 million acres in 1996 (USDA). The question remains, "Are there enough land resources available globally to meetfutwe production needs?" The combined grains and oilseeds area has, however, increased tWer that same period.


The Fapri Process Of Analysis, William H. Meyers, Darnell B. Smith, Steven L. Elmore Aug 2015

The Fapri Process Of Analysis, William H. Meyers, Darnell B. Smith, Steven L. Elmore

Iowa Ag Review

In several past issues of the Iowa Ag Review we have written about baselines and scenarios that the Food and Agricultural Policy Research Institute (FAPRI) produces. This article will clarify what FAPRI is and what it does.