1,036 research outputs found
Studies on the use of sulfites to control shrimp melanosis (Blackspot) (Presented at the 11th Annual Meeting of the Tropical and Subtropical Fisheries Technological Conference of the Americas, January 14, 1986, Tampa, Florida)
Shrimp melanosis, commonly known as 'blackspot' is a
harmless but objectionable surface dicoloration caused by
polyphenoloxidase enzyme systems which remain active during
refrigeration or ice storage. In the early 1950's sulfiting
agents, particularily sodium bisulfite was first introduced to prevent or inhibit melanosis, thus yielding a more valuable harvest (1). Such use of sulfites was 'prior sanctioned1 by the U.S. Food and Drug Administration (FDA) in 1956 (2). More recent FDA decisions reaffirmed this practice, (3) but continuing regulatory scrutiny could restrict or eliminate the application of sulfite on shrimp. The regulatory action is prompted by an increasing concern for adverse 'allergic' reactions most common amongst hyper-(sulfite) sensitive asthmatics. Thus work was initiated to find alternatives to replace or reduce the amount of sulfites required to inhibit
shrimp melanosis. This work would screen for possible
alternatives which would require subsequent verification with field tests and statistical evaluations. (21pp.
Pilot Evaluations of Runway Status Light System
This study focuses on use of the Transport Systems Research Vehicle (TSRV) Simulator at the Langley Research Center to obtain pilot opinion and input on the Federal Aviation Administration's Runway Status Light System (RWSL) prior to installation in an operational airport environment. The RWSL has been designed to reduce the likelihood of runway incursions by visually alerting pilots when a runway is occupied. Demonstrations of the RWSL in the TSRV Simulator allowed pilots to evaluate the system in a realistic cockpit environment
Which anthropometric and lower body power variables are predictive of professional and amateur playing status in male rugby union players?
The purpose of this study was to compare anthropometric and lower body power measurements between current professional and amateur male rugby union players. The present study also sought to determine which anthropometric and physical performance variables were predictive of playing standard. Thirty professional and 30 amateur RU players performed Wattbike 6 s maximal effort (WB6S) and countermovement (CMJ) and squat jump (SJ) assessments, anthropometric measures were also taken. Dependant variables recorded and analysed including: body mass, stature, Σ8 site skinfolds, WB6S absolute and relative peak power, CMJ and SJ average concentric force, jump height, peak velocity, time to peak force, rate of force development (RFD) and absolute and relative peak force and power. Professional players were heavier, taller and leaner than their amateur counterparts (p < 0.05). Professional players performed significantly better in all physical performance measures except CMJ and SJ time to peak force, CMJ RFD and SJ relative peak force. Variables which were predictive of playing standard were: Σ8 skinfolds, CMJ peak velocity and WB6S absolute and relative peak power (p < 0.05). These findings indicate that the current body of male professional RU players is anthropometrically and physically superior to their amateur counterparts, although not all variables assessed here were predictive of playing standard. Data presented here indicate that Σ8 skinfolds, WB6S absolute and relative power and CMJ peak velocity are predictive of playing standard, whereas other anthropometric and strength and power variables are not
Ranchers Diverse in Their Drought Management Strategies
Farm Management, Livestock Production/Industries,
Arctic Ice Export Events and Their Potential Impact on Global Climate During the Late Pleistocene
Ice sheets in the North American Arctic and, to a lesser extent, those in northern Eurasia calved large quantities of icebergs that drifted through Fram Strait into the Greenland Sea several times during the late Pleistocene. These icebergs deposited Fe oxide grains (45-250 mum) and coarse lithic clasts \u3e250 mum matched to specific circum-Arctic sources. Four massive Arctic iceberg export events are identified from the Laurentide and the Innuitian ice sheets, between 14 and 34 ka (calendar years) in a sediment core from Fram Strait. These relatively short duration (\u3c1-4 kyr) events contain 3-5 times the background levels of Fe oxide grains. They began suddenly, as indicated by a steep rise in the number of grains matched to an ice sheet source, suggesting rapid purges of ice through Fram Strait, due perhaps to collapse of ice sheets. The larger events from the northwestern Laurentide ice sheet are preceded by events from the Innuitian ice sheet. Despite the chronological uncertainties, the Arctic export events appear to occur prior to Heinrich events
Marshall University Music Department Presents the 2010 SCI National Student Conference: Concert Three
https://mds.marshall.edu/music_perf/1529/thumbnail.jp
Towards precision particle background estimation for future X-ray missions: correlated variability between Chandra ACIS and AMS
A science goal of many future X-ray observatories is mapping the cosmic web
through deep exposures of faint diffuse sources. Such observations require low
background and the best possible knowledge of the remaining unrejected
background. The dominant contribution to the background above 1-2 keV is from
Galactic Cosmic Ray protons. Their flux and spectrum are modulated by the solar
cycle but also by solar activity on shorter timescales. Understanding this
variability may prove crucial to reducing background uncertainty for ESA's
Athena X-ray Observatory and other missions with large collecting area. We
examine of the variability of the particle background as measured by ACIS on
the Chandra X-ray Observatory and compare that variability to that measured by
the Alpha Magnetic Spectrometer (AMS), a precision particle detector on the
ISS. We show that cosmic ray proton variability measured by AMS is well matched
to the ACIS background and can be used to estimate proton energies responsible
for the background. We discuss how this can inform future missions.Comment: 11 pages, 8 figures, submitted to Proceedings of SPIE Astronomical
Telescopes + Instrumentation 202
Epidemiologic Measures for Quantifying the Incidence of Concussion in National Collegiate Athletic Association Sports
Injury rates compare the relative frequency of sport-related concussions across groups. However, they may not be intuitive to policy makers, parents, or coaches in understanding the likelihood of concussion
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