397 research outputs found
Short-term and long-term effects of toxicants on larval red abalone, Haliotis rufescens
No full text"A thesis presented to the faculty of Moss Landing Marine Laboratories."Thesis (M.S.) -- California State University, Hayward, 1993.by Patrick T. Conroy."A thesis presented to the faculty of Moss Landing Marine Laboratories.
Short-term and Long-term Effects of Toxicants on Larval Red Abalone, Haliotis rufescens
No full textExperiments were conducted to correlate a short-term\ud
48-hour aquatic toxicity test endpoint of abnormal larval\ud
shell development with other, more clearly adverse effects.\ud
In similar experiments conducted with two different\ud
toxicants, zinc sulfate and Bleached Kraft Mill Effluent\ud
(BKME), red abalone (Haliotis rufescens) embryos were\ud
simultaneously added to identical dilution series and\ud
incubated for three different exposure periods: 48-hours,\ud
48-hours followed by an 8-day recovery period, or a 10-day\ud
continuous exposure. Abnormal larval shell development was\ud
assessed in the 48-hour tests, and inhibition of\ud
metamorphosis was assessed in the exposure-recovery (ER) and\ud
long-term (LT) exposures.\ud
For the zinc experiments, the median effective\ud
concentration (ECSO) values for the 48-hour exposure, the\ud
ER, and the LT exposures were 40, 32, and 29 micrograms/L zinc,\ud
respectively. For the BKME experiments, the EC5O values\ud
were 1.00%, 0.78%, and 0.67% effluent, respectively.\ud
Results indicate that toxicant concentrations causing\ud
abnormal larval shell development also inhibit\ud
metamorphosis, and that larvae exposed to toxicant\ud
concentrations which inhibit larval shell development do not\ud
recover to metamorphose when transferred to clean seawater.\ud
None of the successfully metamorphosed post-larvae had\ud
deformed larval shells, indicating that shell deformity\ud
precludes survival past the planktonic stage.\ud
To determine if toxicant exposure delays\ud
metamorphosis, a 15-day continuous and exposure-recovery\ud
BKME experiment was conducted. No significant difference 1n\ud
post-larval shell lengths of successfully metamorphosed\ud
abalone could be attributed to either toxicant concentration\ud
or duration of exposure. Results indicate that exposure to\ud
a toxicant acts to inhibit rather than delay the initiation\ud
of metamorphosis
Short-term and long-term effects of toxicants on larval red abalone, Haliotis rufescens
No full textExperiments were conducted to correlate a short-term 48-hour aquatic toxicity test endpoint of abnormal larval shell development with other, more clearly adverse effects. In similar experiments conducted with two different toxicants, zinc sulfate and Bleached Kraft Mill Effluent (BKME), red abalone (Haliotis rufescens) embryos were simultaneously added to identical dilution series and incubated for three different exposure periods: 48-hours, 48-hours followed by an 8-day recovery period, or a 10-day continuous exposure. Abnormal larval shell development was assessed in the 48-hour tests, and inhibition of metamorphosis was assessed in the exposure-recovery (ER) and long-term (LT) exposures. For the zinc experiments, the median effective concentration (ECSO) values for the 48-hour exposure, the ER, and the LT exposures were 40, 32, and 29 micrograms/L zinc, respectively. For the BKME experiments, the EC5O values were 1.00%, 0.78%, and 0.67% effluent, respectively. Results indicate that toxicant concentrations causing abnormal larval shell development also inhibit metamorphosis, and that larvae exposed to toxicant concentrations which inhibit larval shell development do not recover to metamorphose when transferred to clean seawater. None of the successfully metamorphosed post-larvae had deformed larval shells, indicating that shell deformity precludes survival past the planktonic stage. To determine if toxicant exposure delays metamorphosis, a 15-day continuous and exposure-recovery BKME experiment was conducted. No significant difference 1n post-larval shell lengths of successfully metamorphosed abalone could be attributed to either toxicant concentration or duration of exposure. Results indicate that exposure to a toxicant acts to inhibit rather than delay the initiation of metamorphosis
The Cadet, 1916-12, vol. 03
No full textThe Cadet was published between 1914-1924 as an enterprise for the benefit of the Catholic Cadet Corps. A non-political publication, it covers a wide range of subjects of general interest, including the activities not only of the C.C.C., but of other Newfoundland cadet corps as well.Editorial -- Travel to Newfoundland a century ago : “The King vs. Lannon” / Sir Edward Morris -- [Newfoundland soldiers] [the first of several full-page photo spreads in this issue] -- Eccentric persons [part 2] / A. S. R. -- Heroes whose names shall live : four officers of the C.C.C who have paid the supreme sacrifice [illustrations] -- Charles Carroll of Carrollton : a great Irish-American stateman / Rev. M. J. Ryan -- Their last game : an appreciation / Margot MacMinn -- Historical sketch : St. John’s in the end of the 18th Century and after / H. F. Shortis -- Britain after the war / I. C. Morris -- The city of to-morrow : an attempt at the prophetic / James O’Neill Conroy -- Captain Jim / Cadet -- Our fishing industry / S. St. C. -- Emperor’s funeral : King, princes, high officers and foreign envoys fill St. Stephen’s Cathedral -- Their names shall live in history [illustrations] -- Under the old roof / Susan Brown Robbins -- In memoriam of Ptes. Stanley and George Abbott, killed in action July 1st, 1916 -- Epigrams -- To live a hundred years.Frequency: quarterly (?). Includes numerous advertisements
Effectiveness of Capture Zones Generated by Intermittent Pumping of a PV-Powered Pump-and-Treat System without Energy Storage
No full textA common technology to remediate and/or contain contaminated groundwater is pump-and-treat remediation (P&T). Traditionally, P&T systems have been designed to operate continuously to achieve steady-state capture zones, for which large amounts of energy are required. Green and sustainable remediation (GSR) is emerging as a viable method to minimize the adverse effects of remediation on the environment. One of the challenges associated with photovoltaic- (PV-) powered P&T systems is the assessment of their performance given the intermittent nature of the power availability. This article characterizes the hydraulic containment effectiveness of a PV-powered P&T system without energy storage using data collected at two different remediation sites, a Dry-Cleaning Environmental Response Trust Fund site in Rolla, Missouri, and the Former Nebraska Ordnance Plant near Mead, Nebraska. Additionally, a method to estimate the effectiveness of the hydraulic containment as a function of the total volume of groundwater expected to be extracted is being proposed. Two transient and a continuously pumped capture zones were modeled using Visual MODFLOW® 2012.1 along with MODPATH and compared. The study shows that smaller capture zones will be generated from intermittent pumping when compared to continuous pumping
Thermodynamically efficient process for ethylene recovery
No full text“This thesis contains some of the results of the work involved in developing an optimal equipment configuration for ethylene recovery. A comparison is made (using a simulator) between a conventional design that uses a front end demethanizer with ethylene and propylene refrigerants and a revised design that uses distributed distillation. The material and energy balances for both designs together with their associated refrigeration systems are calculated The two designs are heat integrated after analyzing the appropriate composite heating and cooling curves. The thermodynamic efficiencies within the distillation columns are analyzed. In order to pinpoint the process improvements comparisons are made on three different bases; firstly, including all equipment after the third stage of compression; secondly, including al equipment after the third stage of compression, but excluding the depropanizer and all equipment downstream of the depropanizer; lastly, the effect of thermomechanical integration of the propane/propylene splitter is evaluated.
Process flow diagrams, heating and cooling curves, equipment lists and utility summaries are generated. A comparison is made between the designs based on thermodynamic efficiency and purchased equipment cost.
Areas for new improvement are identified and commented on”--Abstract, page iii
Capture zone modeling for photovoltaic microgrid powered pump and treat remediation
No full textRemediation systems protect human health and the environment by removing harmful contaminants from the environment. Pump and treat groundwater remediation systems typically rely on utility power to continuously pump contaminated groundwater to an above ground treatment unit. However, the use of renewable energy (solar and wind) for a pump and treat remediation system can reduce the output of harmful greenhouse gases and the need for coal-based utility power.
This paper describes a hypothetical renewable energy powered pump and treat remediation system that uses an off-grid photovoltaic array to power a submersible solar water pump. The pump operates on an intermittent schedule predicted by the available solar irradiance via an empirically characterized microgrid prediction model. This model is based on data taken at an off grid PV-powered microgrid.
The intermittently operated pump generates an effective capture zone defined by multiple transient capture zones. Effective capture zones are modeled using Visual MODFLOW and MODPATH and are compared against a continuously pumped steady state capture zone. The comparison showed that a renewable energy powered, intermittently pumped, remediation system can perform 90% as effective as a utility powered, continuously pumped, remediation system --Abstract, page iv
It's the relationship that matters: a qualitative analysis of the role of the student/tutor relationship in counselling training
No full textThis study is a qualitative analysis of the role of student/tutor relationships in counselling training. Two focus groups comprising students on a UK postgraduate diploma in counselling were undertaken and the findings analysed using template analysis. The findings indicated that these relationships have a strong impact on the effectiveness of the learning experience. Students identified a number of valued relational features, with the creation of a safe, supportive learning environment being regarded as of crucial importance. The results suggested that students needed to feel sufficiently comfortable with, and trusting of, tutors if they were to take the kind of interpersonal risks that are necessary in this type of experiential skills based training. Students experienced higher levels of negative affect and, by implication, stress if tutors were unsuccessful in providing sufficient levels of safety and support, particularly in the later stages of training. Strong links were found between the relational concepts students valued in tutors and those previously identified as important in client-therapist and supervisory relationships [Jones, R.A., Mirsalimi, H., Conroy, J.S., Horne- Moyer, H.L., & Burrill, C. (2008). The teaching alliance inventory: Evaluating the student-instructor relationship in clinical and counselling psychology training. Counselling Psychology Quarterly, 21, 223-235; Rogers, C.R. (1957). The necessary and sufficient conditions of therapeutic personality change. Journal of Consulting Psychology, 21, 95-103]. Implications for counselling training and suggestions for future research are discussed
REGIONAL AND URBAN SCIENCE IN FRANCE: RANKINGS OF AUTHORS AND INSTITUTIONS AND PUBLICATION PATTERNS DURING THE NINETIES
No full textThis article analyses the evolution experienced by research in urban and regional science in France between 1991 and 2000, comparing these changes with wider international trends. Nine of the leading international journals of regional and urban studies were used in drawing up rankings of countries, authors and institutions and in exploring publication patterns. We examine the strategy adopted by the French in establishing themselves within the world's top five in regional and urban research and report a number of interesting findings when comparisons are drawn internationally.REGIONAL AND URBAN SCIENCE, BIBLIOMETRICS, RANKINGS
Book Reviews
No full textMilton, Poet of Duality (R. A. Shoaf) (Reviewed by Chris Kendrick, Bryn Mawr College)Paradise Lost and the Rhetoric of Literary Forms (Barbara Kiefer Lewalski) (Reviewed by Chris Kendrick, Bryn Mawr College)American Romanticism and the Marketplace (Michael T. Gilmore) (Reviewed by Elizabeth A. Meese, University of Alabama)In the Circles of Fear and Desire: A Study of Gothic Fantasy (William Patrick) (Reviewed by Patrick Brantlinger, Indiana University-Bloomington)The Theoretical Dimensions of Henry James (John Carlos Rowe) (Reviewed by Ross Posnock, University of Washington)Henry James: Fiction As History (Ian F. A. Bell) (Reviewed by Ross Posnock, University of Washington)Modernism and Authority: Strategies of Legitimation in Flaubert and Conrad (Mark Conroy) (Reviewed by Todd K. Bender, University of Wisconsin -- Madison)Coercion to Speak: Conrad\u27s Poetics of Dialogue (Aaron Fogel) (Reviewed by Todd K. Bender, University of Wisconsin -- Madison)Beasts of the Modern Imagination: Darwin, Nietzsche, Kafka, Ernst, and Lawrence (Margot Norris) (Reviewed by Irving Massey, SUNY, Buffalo)The Forms of Violence: Narrative in Assyrian Art and Modern Culture (Leo Bersani) (Reviewed by Geoffrey Galt Harpham, Brandeis University
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