2,464 research outputs found
Growth and productivity of juvenile banana prawns, Penaeus merguiensis in natural and laboratory systems
Abstract only.Growth and survival of Penaeus merguiensis juveniles were measured over four years in the Norman River estuary, south-eastern Gulf of Carpentaria. Growth in carapace length for the first 8-9 weeks after settlement was essentially linear and averaged 1.2 mm/week in summer at 29.5°C and 0.45 mm/week in winter at 19.5°C. A comparison of different cohorts under varying temperatures and salinities indicated that growth was temperature- but not salinity-dependent. Survival of newly settled postlarvae varied seasonally and was highest in spring (October-November).
In the laboratory, a study of moulting rate and moult increment at 15, 20, 25, 30 and 35°C demonstrated that the optimal temperature for growth was 25-30°C. Survival of juveniles was also highest at intermediate temperatures. Effects of salinity and food ration amounts are discussed
Alien Registration- Staples, Alice S. (Limerick, York County)
https://digitalmaine.com/alien_docs/3246/thumbnail.jp
Forty Years: A Learning Curve -- The Ford Foundation in India 1952-1992
Provides a brief history of Ford's program development in India. Includes rural poverty, sustainable agriculture, education, rights and governance, public administration, urban and regional planning, population, and reproductive health
Charbon or anthrax: with experiences during recent outbreak in north Louisiana
Cover title.Bibliography: p. 52.Mode of access: Internet
Distinct emphysema subtypes defined by quantitative CT analysis are associated with specific pulmonary matrix metalloproteinases.
BACKGROUND: Emphysema is characterised by distinct pathological sub-types, but little is known about the divergent underlying aetiology. Matrix-metalloproteinases (MMPs) are proteolytic enzymes that can degrade the extracellular matrix and have been identified as potentially important in the development of emphysema. However, the relationship between MMPs and emphysema sub-type is unknown. We investigated the role of MMPs and their inhibitors in the development of emphysema sub-types by quantifying levels and determining relationships with these sub-types in mild-moderate COPD patients and ex/current smokers with preserved lung function. METHODS: Twenty-four mild-moderate COPD and 8 ex/current smokers with preserved lung function underwent high resolution CT and distinct emphysema sub-types were quantified using novel local histogram-based assessment of lung density. We analysed levels of MMPs and tissue inhibitors of MMPs (TIMPs) in bronchoalveolar lavage (BAL) and assessed their relationship with these emphysema sub-types. RESULTS: The most prevalent emphysema subtypes in COPD subjects were mild and moderate centrilobular (CLE) emphysema, while only small amounts of severe centrilobular emphysema, paraseptal emphysema (PSE) and panlobular emphysema (PLE) were present. MMP-3, and -10 associated with all emphysema sub-types other than mild CLE, while MMP-7 and -8 had associations with moderate and severe CLE and PSE. MMP-9 also had associations with moderate CLE and paraseptal emphysema. Mild CLE occurred in substantial quantities irrespective of whether airflow obstruction was present and did not show any associations with MMPs. CONCLUSION: Multiple MMPs are directly associated with emphysema sub-types identified by CT imaging, apart from mild CLE. This suggests that MMPs play a significant role in the tissue destruction seen in the more severe sub-types of emphysema, whereas early emphysematous change may be driven by a different mechanism. TRIAL REGISTRATION: Trial registration number NCT01701869
South Dakota v. Wayfair Inc. and Streamlined Sales and Use Tax Agreement: Effects on State Sales Tax Collections
In South Dakota v. Wayfair Inc., the U.S. Supreme Court reversed precedent cases addressing collection standards and regulations for sales taxes. These two precedent cases held that an out-of-state retailer\u27s liability to collect and remit sales tax to the consumer\u27s respective state was contingent on whether the seller had a physical nexus in that state. Additionally, a collaboration among states led to the creation of the Streamlined Sales and Use Tax Agreement (SSUTA), which offered voluntary guidelines and policies to assist states in not only modernizing but maximizing sales tax collection amounts. This research paper utilizes quantitative analyses to examine the effects of South Dakota v. Wayfair Inc. and the SSUTA upon state sales tax collection amounts
A Case Study on Artefact-based RE Improvement in Practice
Most requirements engineering (RE) process improvement approaches are
solution-driven and activity-based. They focus on the assessment of the RE of a
company against an external norm of best practices. A consequence is that
practitioners often have to rely on an improvement approach that skips a
profound problem analysis and that results in an RE approach that might be
alien to the organisational needs. In recent years, we have developed an RE
improvement approach (called \emph{ArtREPI}) that guides a holistic RE
improvement against individual goals of a company putting primary attention to
the quality of the artefacts. In this paper, we aim at exploring ArtREPI's
benefits and limitations. We contribute an industrial evaluation of ArtREPI by
relying on a case study research. Our results suggest that ArtREPI is
well-suited for the establishment of an RE that reflects a specific
organisational culture but to some extent at the cost of efficiency resulting
from intensive discussions on a terminology that suits all involved
stakeholders. Our results reveal first benefits and limitations, but we can
also conclude the need of longitudinal and independent investigations for which
we herewith lay the foundation
Dairy Cow Performance on Pasture-Based Feeding Systems and in Confinement
Interest in grazing systems is growing among farmers in the USA as a means of reducing feed costs for lactating dairy cows. An experiment was conducted near Gainesville, FL to compare milk production and composition and milk income minus feed costs from two pasture-based systems with those of a conventional confinement housing system over a 276-d period. System 1 was based on a mixture of rye (Secale cereale L.), annual ryegrass (Lolium multiflorum Lam.), crimson clover (Trifolium incarnatum L.), and red clover (Trifolium pratense L.) during the winter-spring seasons and pearl millet (Pennisetum glaucum [L.] R.Br.) during the summerfall seasons. System 2 utilized a rye-ryegrass mixture (no clover) during winter-spring and bermudagrass (Cynodon spp.) during summer-fall. Concurrently, cows managed in free-stall housing at the university farm comprised System 3. Cows in confined housing produced 20% more milk than cows on pasture, but feed cost of grazing cows was about one half that of confined cows. Milk income minus feed costs was 5.84, and $5.34 cow-1 d-1 for Systems 1, 2, and 3, respectively
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