762 research outputs found
Proximate composition, energy, fatty acid, sodium, and cholesterol content of finfish, shellfish, and their products
This document contains data concerning the proximate composition and energy, fatty acid, sodium, and cholesterol content of finfish, shellfish, and their products as listed in 228 articles published between the years of 1976 and 1984. Also included is a systematic index of the species as referenced in this document listed alphabetically by scientific name. (PDF file contains 60 pages.
The Stellar Haloes of Massive Elliptical Galaxies III: Kinematics at Large Radius
We present a 2D kinematic analysis out to ~2-5 effective radii (Re) of 33
massive elliptical galaxies with stellar velocity dispersions larger than 150
km/s. Our observations were taken using the Mitchell Spectrograph (formerly
VIRUS-P), a spectrograph with a large 107 x 107 square arcsecond field-of-view
that allows us to construct robust, spatially resolved kinematic maps of the
mean velocity and velocity dispersion for each galaxy extending to at least 2
Re. Using these maps we study the radial dependence of the stellar angular
momentum and other kinematic properties. We see the familiar division between
slow and fast rotators persisting out to large radius in our sample. Centrally
slow rotating galaxies, which are almost universally characterised by some form
of kinematic decoupling or misalignment, remain slowly rotating in their halos.
The majority of fast rotating galaxies show either increases in specific
angular momentum outwards or no change beyond . The generally triaxial
nature of the slow rotators suggests that they formed through mergers,
consistent with a "two-phase" picture of elliptical galaxy formation. However,
we do not observe the sharp transitions in kinematics proposed in the
literature as a signpost of moving from central dissipationally-formed
components to outer accretion-dominated haloes.Comment: 19 pages, 13 figures. 17 Appendix pages, 19 Appendix figure
Proximate composition and fatty acid and cholesterol content of 22 species of northwest Atlantic finfish
The moisture, fat, ash, fatty acid profile, and cholesterol content are reported for cooked and raw fillets from 22 species of finfish found in the Northwest Atlantic. All but nine species had 1%or less fat. Ocean perch and a spring sampling of mackerel and wolffiSh had about 2% fat, followed by yellowfin tuna, whiting, silver hake, butterfish, and a summer -sampling of mackerel and wolffish with a range of 3-7% fat. Herring had a range of 5-12% fat representing a winter sampling on the low end and summer sampling on the high end of the range. Bluefin tuna (a summer sampling) contained the most fat with a high of 23% fat. Omega-3 fatty acids were present in excess of omega-6 fatty acids. The fattier fISh supplied the most omega-3
fatty acids per gram of tissue. The mean cholesterol content for all species was 57 ± 16 mg/l00 g raw tissue. Finfish from the Northwest Atlantic would appear to fit into the regime for a healthy heart, being low in fat and cholesterol and rich in omega-3 fatty acids.(PDF file contains 42 pages.
The MASSIVE Survey II: Stellar Population Trends Out to Large Radius in Massive Early Type Galaxies
We examine stellar population gradients in ~100 massive early type galaxies
spanning 180 < sigma* < 370 km/s and M_K of -22.5 to -26.5 mag, observed as
part of the MASSIVE survey (Ma et al. 2014). Using integral-field spectroscopy
from the Mitchell Spectrograph on the 2.7m telescope at McDonald Observatory,
we create stacked spectra as a function of radius for galaxies binned by their
stellar velocity dispersion, stellar mass, and group richness. With excellent
sampling at the highest stellar mass, we examine radial trends in stellar
population properties extending to beyond twice the effective radius (~2.5
R_e). Specifically, we examine trends in age, metallicity, and abundance ratios
of Mg, C, N, and Ca, and discuss the implications for star formation histories
and elemental yields. At a fixed physical radius of 3-6 kpc (the likely size of
the galaxy cores formed at high redshift) stellar age and [alpha/Fe] increase
with increasing sigma* and depend only weakly on stellar mass, as we might
expect if denser galaxies form their central cores earlier and faster. If we
instead focus on 1-1.5 R_e, the trends in abundance and abundance ratio are
washed out, as might be expected if the stars at large radius were accreted by
smaller galaxies. Finally, we show that when controlling for \sigmastar, there
are only very subtle differences in stellar population properties or gradients
as a function of group richness; even at large radius internal properties
matter more than environment in determining star formation history.Comment: 17 pages, 9 figures, accepted by ApJ; resubmitted with updated
reference
The MASSIVE Survey - I. A Volume-Limited Integral-Field Spectroscopic Study of the Most Massive Early-Type Galaxies within 108 Mpc
Massive early-type galaxies represent the modern-day remnants of the earliest
major star formation episodes in the history of the universe. These galaxies
are central to our understanding of the evolution of cosmic structure, stellar
populations, and supermassive black holes, but the details of their complex
formation histories remain uncertain. To address this situation, we have
initiated the MASSIVE Survey, a volume-limited, multi-wavelength,
integral-field spectroscopic (IFS) and photometric survey of the structure and
dynamics of the ~100 most massive early-type galaxies within a distance of 108
Mpc. This survey probes a stellar mass range M* > 10^{11.5} Msun and diverse
galaxy environments that have not been systematically studied to date. Our
wide-field IFS data cover about two effective radii of individual galaxies, and
for a subset of them, we are acquiring additional IFS observations on
sub-arcsecond scales with adaptive optics. We are also acquiring deep K-band
imaging to trace the extended halos of the galaxies and measure accurate total
magnitudes. Dynamical orbit modeling of the combined data will allow us to
simultaneously determine the stellar, black hole, and dark matter halo masses.
The primary goals of the project are to constrain the black hole scaling
relations at high masses, investigate systematically the stellar initial mass
function and dark matter distribution in massive galaxies, and probe the
late-time assembly of ellipticals through stellar population and kinematical
gradients. In this paper, we describe the MASSIVE sample selection, discuss the
distinct demographics and structural and environmental properties of the
selected galaxies, and provide an overview of our basic observational program,
science goals and early survey results.Comment: 19 pages, 14 figures. ApJ (2014) vol. 795, in pres
The Stellar Halos of Massive Elliptical Galaxies II: Detailed Abundance Ratios at Large Radius
We study the radial dependence in stellar populations of 33 nearby early-type
galaxies with central stellar velocity dispersions sigma* > 150 km/s. We
measure stellar population properties in composite spectra, and use ratios of
these composites to highlight the largest spectral changes as a function of
radius. Based on stellar population modeling, the typical star at 2 R_e is old
(~10 Gyr), relatively metal poor ([Fe/H] -0.5), and alpha-enhanced
([Mg/Fe]~0.3). The stars were made rapidly at z~1.5-2 in shallow potential
wells. Declining radial gradients in [C/Fe], which follow [Fe/H], also arise
from rapid star formation timescales due to declining carbon yields from
low-metallicity massive stars. In contrast, [N/Fe] remains high at large
radius. Stars at large radius have different abundance ratio patterns from
stars in the center of any present-day galaxy, but are similar to Milky Way
thick disk stars. Our observations are thus consistent with a picture in which
the stellar outskirts are built up through minor mergers with disky galaxies
whose star formation is truncated early (z~1.5-2).Comment: ApJ in press, 12 pages, 6 figure
Fecal-Sac Ingestion by Spotted Towhees
Altricial nestlings encase excrement in fecal sacs that parents remove by either ingesting them or transporting them away from the nest. Ingestion may allow energetically or nutritionally deprived parents to recapture energy or nutrients that might be lost because of nestlings\u27 inefficient digestion (the parental-nutrition hypothesis ), but ingestion may also permit parents to avoid flights from the nest that interfere with parental care (e.g., brooding young; the economic-disposal hypothesis ). We used a hypothetico-deductive approach to test the two hypotheses\u27 ability to account for fecal-sac ingestion by the Spotted Towhee (Pipilo maculatus). We confirmed the parental-nutrition hypothesis\u27 predictions that more fecal sacs should be ingested in years of food shortage (males only), late in the season when food supplies decline (both sexes), by parents that had the greatest difficulty raising young (i.e., underweight young), and that adults\u27 body condition should vary directly with their rate of fecal-sac ingestion (females only). We rejected the economic-disposal hypothesis\u27 prediction of a decline in fecal-sac ingestion with increasing brood size. The latter, plus the observation that nearly 40% of males ingest fecal sacs despite their spending virtually no time attending nests, suggests that fecal-sac ingestion is not a mechanism to avoid needless and time-consuming flights from the nest that interfere with parental care. Fecal-sac ingestion by Spotted Towhees is better interpreted as either a resource supplement to parents or as a mechanism to satiate hunger so that parents can maintain rates of feeding to dependent young
Reframing the Narrative: Developing Information Literacy Learning Outcomes using Backward Design and Consensus Decision Making [Slides]
Slides from presentation given April 11, 2019 at the 2019 ACRL national conference in Cleveland, OH. Two librarians will lead workshop participants through the process they used to develop new information literacy program learning outcomes aligned to the ACRL Framework for Information Literacy at their university. In groups, participants will hand code sample qualitative data based on survey responses from librarians about essential information literacy skills and habits of mind students at different levels of study should have. Group members will collaboratively compare their codes, develop higher-level categories, align categories to the Framework, and draft learning outcomes. Participants will be able to adapt this method at their home institutions using nothing more than common office supplies
Components of palliative care interventions addressing the needs of people with dementia living in long term care: a systematic review
© The Author(s) 2020. This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).Background: People with dementia requiring palliative care havemultiple needs that require complex, multicomponent interventions. Thisneed is amplified in the long term care setting. The European Associationfor Palliative Care (EAPC) White Paper offers recommendations forpalliative care in dementia and highlights domains of care integral forthis population, thus providing useful guidance to developing suchinterventions. This review maps components of palliative careinterventions for people with dementia in LTCFs, with a particular focuson shared decision-making.Peer reviewe
Development of an autonomous algal toxin analytical platform for aquatic monitoring
Cyclic peptide cyanobacterial toxins, in particular Microcystis aeruginosa, pose a serious health risk to humans and animals alike [1], [2]. Occurring mostly in fresh and brackish water, they have been identified to cause cancer promotion and liver damage [3]. Herein, we describe a portable, microfluidic-based system for in-situ detection of algal toxins in fresh water.
The technology development presented here is a fully integrated and portable sample-to-answer centrifugal microfluidics-based system for the detection of toxic cyanobacteria â Microcystin-LR in fresh water. Our unique system employs highly-specific recombinant chicken anti-microcystin antibodies, prepared in-house, with a 3D-printed âLASER-photoÂŹdiodeâ fluorescent detection technique, also developed in-house. The system has high analytical specificity and sensitivity for detection of toxins below the regulatory limit with intra/inter day coefficient of variation of less than 20%. Dissolvable-film based valving technique was used for flow actuation and integration of multiple assays on the centrifugal cartridge. This new approach forms the basis of a cost efficient, USB-controlled water quality monitoring system.
Technically, this integrated system consists of two components; a microfluidic disc (figure 1.A), the disc-holder fabricated and assembled from a 3D-printed casing, with electronic components housed in device. The 5-layered microfluidic disc consists of five reservoirs (figure 1.B), each with a separate venti-lation, aligned radially with inter-connected microchannels. A competitive immunoassay format is utilised to detect free toxin (figure 1.C). Sensitivity, reproducibility and ease-of-use are key features of this monitoring device. The âtop-downâ optical detection system has been modified for improved detection sensitivity, as well as the elimination of external noise
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