Interactions between Cd, Cu, and Zn Influence Particulate Phytochelatin Concentrations in Marine Phytoplankton:  Laboratory Results and Preliminary Field Data

2003 ◽  
Vol 37 (16) ◽  
pp. 3609-3618 ◽  
Author(s):  
Liping Wei ◽  
John R. Donat ◽  
Gary Fones ◽  
Beth A. Ahner
Keyword(s):  
Field Data ◽  
Marine Phytoplankton ◽  
Laboratory Results ◽  
Cu And Zn

Paraffin Deposition From Crude Oils: Comparison of Laboratory Results With Field Data

SPE Journal ◽  
1999 ◽  
Vol 4 (01) ◽  
pp. 9-18 ◽  
Author(s):  
Ahmed Hammami ◽  
M.A. Raines
Keyword(s):  
Field Data ◽  
Crude Oils ◽  
Laboratory Results

scholarly journals PORT OF BRISBANE SILTATION STUDY

1980 ◽  
Vol 1 (17) ◽  
pp. 141
Author(s):  
N.V.M. Oud ◽  
T. Baxter
Keyword(s):  
Mathematical Model ◽  
Sediment Transport ◽  
Mathematical Models ◽  
Field Data ◽  
Tidal River ◽  
Model Investigation ◽  
Saline Intrusion ◽  
Laboratory Results ◽  
Tidal Flows ◽  
Mud Transport

The paper describes the constituent parts of a combined field and mathematical model investigation into the processes causing siltation in the Port of Brisbane. It describes the methods of collecting and using field data and laboratory results in conjunction with a variety of mathematical models which were employed to simulate and predict the interaction of tidal and fluvial flows, saline intrusion and sediment transport in the Brisbane tidal river. A newly developed X-Z-T model was used to simulate the unsteady patterns of mud transport and siltation resulting from the interaction of tidal flows with short flashy fluvial floods, which are the main cause of shoaling in the Port. The paper discusses the structuring of the investigation which involved a carefully phased schedule of desk, field, laboratory and mathematical model investigations with the aim of solving the problem with minimum effort and cost. The paper does not discuss predictions.

scholarly journals THE DYNAMIC RESPONSE OF SHINGLE BEACHES TO RANDOM WAVES

1988 ◽  
Vol 1 (21) ◽  
pp. 130 ◽  
Author(s):  
K.A. Powell
Keyword(s):  
Field Data ◽  
Wave Reflection ◽  
Relative Magnitude ◽  
Random Wave ◽  
Random Waves ◽  
Wave Flume ◽  
Probabilistic Distribution ◽  
Laboratory Results ◽  
Run Up ◽  
Reflection Characteristics

An extensive laboratory investigation into the behaviour of shingle beaches has been undertaken using a large random wave flume. The study utilised a lightweight material scaled to reproduce the correct permeability of the beach, and the correct threshold and relative magnitude of the onshore/offshore movement. Results are presented describing both the wave reflection characteristics of the beach and the probabilistic distribution of wave run-up crests on the foreshore. Where possible the laboratory results are validated against field data.

Trace Metal Substitution in Marine Phytoplankton

2020 ◽  
Vol 48 (1) ◽  
pp. 491-517 ◽  
Author(s):  
François M.M. Morel ◽  
Phoebe J. Lam ◽  
Mak A. Saito
Keyword(s):  
Field Data ◽  
Inorganic Carbon ◽  
Laboratory Data ◽  
South Pacific ◽  
Essential Elements ◽  
Marine Phytoplankton ◽  
Future Research ◽  
Carbonic Anhydrases ◽  
Surface Seawater ◽  
Biochemical Processes

The sinking of organic matter to the deep ocean leaves extremely low concentrations of major and trace nutrients for photosynthetic organisms at the sunlit surface. As a result, marine phytoplankton make use of alternative sources of essential elements and have evolved to substitute some elements by others in various biochemical processes. A particularly intriguing example is that of Zn, which is used in many biochemical functions but is often depleted down to picomolar concentrations in surface seawater. Laboratory data show that many phytoplankton species are able to achieve high growth rates by replacing Zn with Cd or Co in cultures. One documented biochemical replacement occurs in some carbonic anhydrases that are used in the acquisition of inorganic carbon for photosynthesis. Field data show the existence of such enzymes in surface seawater and indicate a replacement of Zn by Cd and Co in the surface waters of the eastern tropical South Pacific. Those results point at interesting opportunities for future research. ▪  The dearth of essential elements in surface seawater has caused marine phytoplankton to substitute some trace metals by others in various biochemical processes. ▪  Many species can substitute Cd and/or Co for Zn as a metal center in carbonic anhydrase enzymes that are used in the acquisition of inorganic carbon for photosynthesis. ▪  Field data show the presence of such enzymes in the sea and indicate a replacement of Zn by Cd and Co in the surface upwelling waters of the eastern tropical South Pacific. ▪  New analytical and molecular tools provide opportunities to elucidate the unusual biochemistry of marine phytoplankton.

Geotechnical aspects of iceberg scours on ocean floors

1979 ◽  
Vol 16 (2) ◽  
pp. 379-390 ◽  
Author(s):  
T. Ramanuja Chari
Keyword(s):  
Field Data ◽  
Oil And Gas ◽  
Simple Analysis ◽  
Oil Drilling ◽  
Laboratory Results

Results of exploratory oil drilling on Canada's eastern offshore are highly encouraging. However, the seasonal presence of icebergs in this area poses a threat to the production platforms as well as the pipelines likely to convey oil and gas. This paper describes a simple analysis for iceberg grounding and scouring of ocean floors. Theoretical and laboratory results are presented and compared with the limited field data available at present.

scholarly journals What Do Laboratory Experiments Measuring Social Preferences Reveal About the Real World?

2007 ◽  
Vol 21 (2) ◽  
pp. 153-174 ◽  
Author(s):  
Steven D Levitt ◽  
John A List
Keyword(s):  
Empirical Evidence ◽  
Real World ◽  
Field Data ◽  
Laboratory Experiments ◽  
Social Preferences ◽  
Critical Question ◽  
The Real ◽  
Naturally Occurring ◽  
Laboratory Results

A critical question facing experimental economists is whether behavior inside the laboratory is a good indicator of behavior outside the laboratory. To address that question, we build a model in which the choices that individuals make depend not just on financial implications, but also on the nature and extent of scrutiny by others, the particular context in which a decision is embedded, and the manner in which participants and tasks are selected. We present empirical evidence demonstrating the importance of these various factors. To the extent that lab and naturally occurring environments systematically differ on any of these dimensions, the results obtained inside and outside the lab need not correspond. Focusing on experiments designed to measure social preferences, we discuss the extent to which the existing laboratory results generalize to naturally-occurring markets. We summarize cases where the lab may understate the importance of social preferences as well as instances in which the lab might exaggerate their importance. We conclude by emphasizing the importance of interpreting laboratory and field data through the lens of theory.

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