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2004

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Physical Forcing Of Phytoplankton Community Structure And Primary Production In Continental Shelf Waters Of The Western Antarctic Peninsula, Barbara B. Prézelin, Eileen E. Hofmann, Mark Moline, John M. Klinck Jan 2004

Physical Forcing Of Phytoplankton Community Structure And Primary Production In Continental Shelf Waters Of The Western Antarctic Peninsula, Barbara B. Prézelin, Eileen E. Hofmann, Mark Moline, John M. Klinck

OES Faculty Publications

Analyses of a multidisciplinary data set, collected in continental shelf waters of the Western Antarctic Peninsula (WAP) during austral summer of January 1993, identified a previously unrecognized forcing mechanism that sets up a physical and chemical structure that supports and assures site-specific diatom-dominated communities and enhanced biological production (Prézelin et al., 2000). This forcing is active when the southern boundary of the Antarctic Circumpolar Current (ACC) flows along the shelf edge, thereby facilitating onshelf bottom intrusions of nutrient-rich Upper Circumpolar Deep Water (UCDW), which then is upwelled or mixed into the upper water column. At times or locations where UCDW …

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Black Carbon In Estuarine And Coastal Ocean Dissolved Organic Matter, Antonio Mannino, H. Rodger Harvey Jan 2004

Black Carbon In Estuarine And Coastal Ocean Dissolved Organic Matter, Antonio Mannino, H. Rodger Harvey

OES Faculty Publications

We measured black carbon (BC) in ultrafiltered, high-molecular weight dissolved organic matter (UDOM) in surface waters of Delaware Bay, Chesapeake Bay, and the adjacent Atlantic Ocean (U.S.A.) to investigate the importance of riverine and estuarine dissolved organic matter (DOM) as a source of BC to the ocean. BC was 5-72% of UDOM-C (27 ± 17%), which corresponds to 8.9 ± 6.5% of dissolved organic carbon (DOC), with higher values in the heavily urbanized midbay region of the Delaware Estuary and lower yields in the river and coastal ocean. The spatial and seasonal distributions of BC along the salinity gradient of …

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Does Antarctic Krill Employ Body Shrinkage As An Overwintering Strategy?, Se-Jong Ju, H. Rodger Harvey, H. C. Shinn, Y. Kim, S. H. Kang Jan 2004

Does Antarctic Krill Employ Body Shrinkage As An Overwintering Strategy?, Se-Jong Ju, H. Rodger Harvey, H. C. Shinn, Y. Kim, S. H. Kang

OES Faculty Publications

To determine if Antarctic krill employ body shrinkage as one of its overwintering mechanisms in the field, Euphausia superba and Euphausia crystallorophias were collected during fall and winter in and around Marguerite Bay through US Southern Ocean GLOBEC field programs during fall and winter 2001 and 2002. The relationships between the body length and weight of both krill species were exponentially correlated with no significant differences between the two species (p>0.05). The ratio between eye diameter and body length of individual krill was examined in an expectation that it could be used as an indicator of the body shrinkage …

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Relevant Scales In Zooplankton Ecology: Distribution, Feeding, And Reproduction Of The Copepod Acartia Hudsonica In Response To Thin Layers Of The Diatom Skeletonema Costatum, Alexander B. Bochdansky, Stephen M. Bollens Jan 2004

Relevant Scales In Zooplankton Ecology: Distribution, Feeding, And Reproduction Of The Copepod Acartia Hudsonica In Response To Thin Layers Of The Diatom Skeletonema Costatum, Alexander B. Bochdansky, Stephen M. Bollens

OES Faculty Publications

We investigated the interaction of the copepod Acartia hudsonica in relation to thin layers of the diatom Skeletonema costatum. Thin layers have recently received much attention, since they are common and persistent features in the water column, often overlooked by traditional sampling methods. Their frequent abundance in coastal oceans and the high biomass associated with them has led to the assumption that they are important grazing sites of calanoid copepods. We employed 2-m tall tower tanks that allowed us to simulate thin layers. Three variables representative of three time scales were considered: the distribution of copepods in the tanks …

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Interactive Regulation Of Dissolved Copper Toxicity By An Estuarine Microbial Community, Christina L. Dryden, Andrew S. Gordon, John R. Donat Jan 2004

Interactive Regulation Of Dissolved Copper Toxicity By An Estuarine Microbial Community, Christina L. Dryden, Andrew S. Gordon, John R. Donat

OES Faculty Publications

Cultured marine microorganisms under copper stress produce extracellular compounds having a high affinity for copper (copper-complexing ligands). These ligands are similar in binding strength to those found in natural waters, but few studies have examined the relationship between copper, copper-complexing ligand concentrations, and natural microbial populations. A series of in situ experiments in the Elizabeth River, Virginia, revealed that an intact estuarine microbial community responded to copper stress by production of extracellular, high-affinity copper-complexing ligands. The rate of ligand production was dependent on copper concentration and resulted in a reduction of the concentration of free cupric ions, Cu2+, …

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Age And Growth Of Scotia Sea Icefish, Chaenocephalus Aceratus, From The South Shetland Islands, M. La Mesa, J. Ashford, E. Larson, M. Vacchi Jan 2004

Age And Growth Of Scotia Sea Icefish, Chaenocephalus Aceratus, From The South Shetland Islands, M. La Mesa, J. Ashford, E. Larson, M. Vacchi

OES Faculty Publications

Samples of Chaenocephalus aceratus (Lönnberg) were collected during a trawl survey carried out around the South Shetland Islands in January–February 2002. Fish were caught by commercial bottom trawl fishing down to 500 m depth, using a stratified randomized sampling design. As observed in other recent surveys within the same area, C. aceratus represented one of the predominant species. Overall, 357 specimens ranging from 13 and 67 cm (TL) were selected for the present study. Ages were estimated by counting annuli present in the sagittal otoliths, exposed by grinding and polishing along their sagittal plane. To estimate the precision of age …

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Dinitrogen Fixation And Release Of Ammonium And Dissolved Organic Nitrogen By Trichodesmium Ims101, Margaret R. Mulholland, Deborah A. Bronk, Douglas G. Capone Jan 2004

Dinitrogen Fixation And Release Of Ammonium And Dissolved Organic Nitrogen By Trichodesmium Ims101, Margaret R. Mulholland, Deborah A. Bronk, Douglas G. Capone

OES Faculty Publications

Two methods used to measure dinitrogen (N2) fixation (acetylene reduction and 15N2 uptake) often result in different N2 fixation rates. Part of the discrepancy may arise from the observation that Trichodesmium can release a fraction of their recently fixed N2 as dissolved organic nitrogen (DON) and/or ammonium (NH4 +). To resolve outstanding issues regarding N2 fixation and the production of dissolved combined nitrogen (N) by Trichodesmium, we conducted a comprehensive analysis of N2 fixation and the production of DON and NH4+ in cultures of Trichodesmium IMS101. We performed …

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Goal Directed Visual Search Based On Color Cues: Co-Operative Effectes Of Top-Down & Bottom-Up Visual Attention, Vishal S. Vaingankar Jan 2004

Goal Directed Visual Search Based On Color Cues: Co-Operative Effectes Of Top-Down & Bottom-Up Visual Attention, Vishal S. Vaingankar

Theses

Focus of Attention plays an important role in perception of the visual environment. Certain objects stand out in the scene irrespective of observers' goals. This form of attention capture, in which stimulus feature saliency captures our attention, is of a bottom-up nature. Often prior knowledge about objects and scenes can influence our attention. This form of attention capture, which is influenced by higher level knowledge about the objects, is called top-down attention. Top-down attention acts as a feedback mechanism for the feed-forward bottom-up attention. Visual search is a result of a combined effort of the top-down (cognitive cue) system and …

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Cover And Contents Jan 2004

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.

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Cover And Contents Jan 2004

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.

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The Battle For The University: The Vietnam-Era Student Movement At Universities In Central Illinois, David Bell Jan 2004

The Battle For The University: The Vietnam-Era Student Movement At Universities In Central Illinois, David Bell

Masters Theses

America in the 1960s ran the gamut of social, economic, and political changes, from the assassination of political leaders to the apocalyptic potential of the Cuban Missile Crisis; from President Lyndon B. Johnson's promises of a Great Society, to the paralyzing effects of the Vietnam War. At the center of these domestic and international battles lay the "baby boomers," the largest-ever generation of Americans, and, not coincidentally, the largest generation of college students to enter the "ivory towers" of higher education. Raised in an era defined by cries for civil rights and "participatory democracy," these youths entered higher education determined …

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Seasonal Use Of An Abandoned Mine And Summer Maternity Roost By Northern Bats (Myotis Septentrionalis), Heather Rae Fraser Jan 2004

Seasonal Use Of An Abandoned Mine And Summer Maternity Roost By Northern Bats (Myotis Septentrionalis), Heather Rae Fraser

Masters Theses

No abstract provided.

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Physiological Performance Of Thamnophis Hammondii Is Not Affected After Eating The Toxic Frog Xenopus Laevis, C. Drew Foster Jan 2004

Physiological Performance Of Thamnophis Hammondii Is Not Affected After Eating The Toxic Frog Xenopus Laevis, C. Drew Foster

Masters Theses

No abstract provided.

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Factors Affecting The Mate Guarding Behavior In Japanese Beetles (Popillia Japonica Newman), Yoriko Saeki Jan 2004

Factors Affecting The Mate Guarding Behavior In Japanese Beetles (Popillia Japonica Newman), Yoriko Saeki

Masters Theses

No abstract provided.

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Impacts Of Agricultural Landscapes On The Breeding Biology And Behavioral Ecology Of Grassland Birds, Susan Allison Linn Jan 2004

Impacts Of Agricultural Landscapes On The Breeding Biology And Behavioral Ecology Of Grassland Birds, Susan Allison Linn

Masters Theses

No abstract provided.

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Eastern Box Turtle (Terrapene C. Carolina) As A Dispersal Vector Of Seeds And Spores, William J. Jordan Jan 2004

Eastern Box Turtle (Terrapene C. Carolina) As A Dispersal Vector Of Seeds And Spores, William J. Jordan

Masters Theses

No abstract provided.

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Tectonic/Volcanic Segmentation And Controls On Hydrothermal Venting Along Earth's Fastest Seafloor Spreading System, Epr 27°–32°S, Richard Hey, Edward Baker, Delwayne Bohnenstiehl, Gary Massoth, Martin Kleinrock, Fernando Martinez, David Naar, Debra Pardee, John Lupton, Richard Feely, Jim Gharib, Joe Resing, Cristian Rodrigo, Francis Sansone, Sharon Walker Jan 2004

Tectonic/Volcanic Segmentation And Controls On Hydrothermal Venting Along Earth's Fastest Seafloor Spreading System, Epr 27°–32°S, Richard Hey, Edward Baker, Delwayne Bohnenstiehl, Gary Massoth, Martin Kleinrock, Fernando Martinez, David Naar, Debra Pardee, John Lupton, Richard Feely, Jim Gharib, Joe Resing, Cristian Rodrigo, Francis Sansone, Sharon Walker

Marine Science Faculty Publications

We have collected 12 kHz SeaBeam bathymetry and 120 kHz DSL-120 side-scan sonar and bathymetry data to determine the tectonic and volcanic segmentation along the fastest spreading (∼150 km/Myr) part of the global mid-ocean ridge system, the southern East Pacific Rise between the Easter and Juan Fernandez microplates. This area is presently reorganizing by large-scale dueling rift propagation and possible protomicroplate tectonics. Fracture patterns observed in the side-scan data define structural segmentation scales along these ridge segments. These sometimes, but not always, correlate with linear volcanic systems defining segmentation in the SeaBeam data. Some of the subsegments behave cohesively, with …

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Synthesis, Spectral Characterization And Biological Applications Of Tri- And Diorganotin(Iv) Derivatives Of 2-[N-(2,6-Dichloro-3-Methylphenyl)Amino]Benzoic Acid, Sohail Mahmood, Saqib Ali, Moazzam Hussain Bhatti, Mohammad Mazhar, Khadija Shahid, Khalid Mohammed Khan, Ghulam Mustafa Maharvi Jan 2004

Synthesis, Spectral Characterization And Biological Applications Of Tri- And Diorganotin(Iv) Derivatives Of 2-[N-(2,6-Dichloro-3-Methylphenyl)Amino]Benzoic Acid, Sohail Mahmood, Saqib Ali, Moazzam Hussain Bhatti, Mohammad Mazhar, Khadija Shahid, Khalid Mohammed Khan, Ghulam Mustafa Maharvi

Turkish Journal of Chemistry

A series of tri- and diorganotin(IV) compounds with the general formulae R_{3}SnL and R_{2}SnL_{2} (where R = Me, n-Bu, Ph and L = 2-[N-(2,6-dichloro-3-methylphenyl)-amino]benzoate) were synthesized. These compounds were characterized by different instrumental methods such as infrared, multinuclear NMR (^{1}H, ^{13}C, ^{119}Sn) and mass spectrometry. The spectroscopic investigation illustrates that the carboxylate group acts as a bidentate in solid state and as a monodentate in solution. Biological screening tests reveal that the investigated compounds have potential as antibacterial agents.

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One Step Synthesis And Some Reactions Of 7-Hydrazino-3,4-Diphenyl- 2h-Pyrazolo [3,4-D] Pyridazine, Ahmet Şener Jan 2004

One Step Synthesis And Some Reactions Of 7-Hydrazino-3,4-Diphenyl- 2h-Pyrazolo [3,4-D] Pyridazine, Ahmet Şener

Turkish Journal of Chemistry

The 7-hydrazino-3,4-diphenyl-2H-pyrazolo-[3,4-d]-pyridazine 3, obtained in 2 different ways consisting of the reactions of anhydrous hydrazine with 4-benzoyl-5-phenyl-2,3-dihydro-2,3-furandione 1 or 3,4-diphenyl-2H-pyrazolo-[3,4-d]-pyridazin-7(6H)-one 2, was converted into hydrazone derivatives 4 by the reactions of 3 with various salicylaldehydes.

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Cover And Contents Jan 2004

Cover And Contents

Turkish Journal of Chemistry

No abstract provided.

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Determination Of Trace Amounts Of Iodide By An Inhibition Kinetic Spectrophotometric Method, Ramazan Gürkan, Ni̇lgün Bi̇çer, M. Hi̇kmet Özkan, Mehmet Akçay Jan 2004

Determination Of Trace Amounts Of Iodide By An Inhibition Kinetic Spectrophotometric Method, Ramazan Gürkan, Ni̇lgün Bi̇çer, M. Hi̇kmet Özkan, Mehmet Akçay

Turkish Journal of Chemistry

In this study, the reaction between Co(III)-EDTA and hypophosphite ion, catalyzed by Pd(II), was chosen as the indicator reaction. The inhibition kinetics of this catalytic reaction were investigated in the presence of iodide ion and the possibility of its analytical application was evaluated. Catalyzers other than PdCl_2 (Pt, Au and Ni salts) were assayed for the indicator reaction and it was observed that these catalysts have no effect on the reaction. The important variables that affected the reaction rate were investigated and the optimum conditions giving maximum sensitivity were established. The calibration graph, prepared following the inhibition kinetic method, gave …

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Cover And Contents Jan 2004

Cover And Contents

Turkish Journal of Chemistry

No abstract provided.

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Growth Trends And Water Use Efficiency Of Pinus Pinaster Ait. In Response To Historical Climate And Groundwater Trends On The Gnangara Mound, Western Australia, Lindsay Bourke Jan 2004

Growth Trends And Water Use Efficiency Of Pinus Pinaster Ait. In Response To Historical Climate And Groundwater Trends On The Gnangara Mound, Western Australia, Lindsay Bourke

Theses : Honours

In Western Australia, groundwater accounts for about 57% of Perth's water supply. The majority of this is from the Gnangara Mound, the largest superficial aquifer on the Swan Coastal Plain. Prior to the mid 1970's groundwater of the superficial aquifer reached a semi-steady state, however since this period levels have been steadily falling. This decline coincides with a dramatic change in Perth's climate, groundwater abstraction and maturation of pine plantations. The influence of pine plantations upon groundwater recharge is well understood, however there is paucity of information about groundwater use, in particular whether pines directly access shallow groundwater resources. This …

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Mendel's Legacy: The Origin Of Classical Genetics, Michael Dietrich Jan 2004

Mendel's Legacy: The Origin Of Classical Genetics, Michael Dietrich

Dartmouth Scholarship

Review of Mendel's Legacy: The Origin of Classical Genetics by Elof Axel Carlson, 2004

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Reply To Joshua Meltzer, Joost Pauwelyn Jan 2004

Reply To Joshua Meltzer, Joost Pauwelyn

Michigan Journal of International Law

A reply to Joshua Meltzer's comment on the author's paper Bridging Fragmentation and Unity: International Law as a Universe of Inter-Connected Islands

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The Hole In The Whole: Sovereignty, Shared Sovereignty, And International Law, Stephen D. Krasner Jan 2004

The Hole In The Whole: Sovereignty, Shared Sovereignty, And International Law, Stephen D. Krasner

Michigan Journal of International Law

Ideally, a body of law comprises a set of coherent and consistent rules. These rules contribute to the creation of an environment that is predictable, efficacious, and just. Most international lawyers hope, expect, or believe that such a body of law can exist for the international system. This is a fool's errand.

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Diversity Or Cacophony? The Continuing Debate Over New Sources Of International Law, Kalypso Nicolaïdis, Joyce L. Tong Jan 2004

Diversity Or Cacophony? The Continuing Debate Over New Sources Of International Law, Kalypso Nicolaïdis, Joyce L. Tong

Michigan Journal of International Law

We have reached a point when lawyers' commissions are summoned to discuss the consequences of legal proliferation as an ill threatening the standing of international law through incompatibility or irrelevance. Should this trend towards fragmentation be reversed? Should we devise a legal non-proliferation treaty? Or should we, conversely, welcome the current diversification in the sources of law as reflecting the realities of today's world, as a reflection of the flexibility and adaptability of law when the norm of sovereignty on which it is based is itself undergoing considerable recalibration? In short: how should we deal theoretically as well as practically …

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The New Codex Alimentarius Commission Standards For Food Created With Modern Biotechnology: Implications For The Ec Gmo Framework's Compliance With The Sps Agreement, Aaron A. Ostrovsky Jan 2004

The New Codex Alimentarius Commission Standards For Food Created With Modern Biotechnology: Implications For The Ec Gmo Framework's Compliance With The Sps Agreement, Aaron A. Ostrovsky

Michigan Journal of International Law

This Note makes two assertions. First, despite the fact that the Codex guidelines do not specifically invoke the Precautionary Principle in name, it can indeed be read into the guidelines in the amount of deference given to states in how they assess risk. This in turn means that the E.C.'s Deliberate Release Directive should be enjoy a presumption of compliance with both the SPS Agreement and the GATT. The second assertion is that even if the adjudicating body of the WTO finds that the Deliberate Release Directive, in relying on the Precautionary Principle, prescribes a higher level of protection than …

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The War Against Iraq And The Future Of International Law: Hegemony Or Pluralism?, Andreas Paulus Jan 2004

The War Against Iraq And The Future Of International Law: Hegemony Or Pluralism?, Andreas Paulus

Michigan Journal of International Law

This Article is devoted to the question of the future relevance of international law at a time when the idea of a "rule of law" in international affairs seems to be waning. Why should the sole superpower look to international law in its quest for protection from dangers of weapons of mass destruction and terrorists? Is the European insistence on questions of legality, which was visible in the dramatic British attempts to secure some kind of Security Council backing and to advance international legal arguments for its participation in the invasion of Iraq, more than a fig leaf for a …

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Regime-Collisions: The Vain Search For Legal Unity In The Fragmentation Of Global Law, Andreas Fischer-Lescano, Gunther Teubner Jan 2004

Regime-Collisions: The Vain Search For Legal Unity In The Fragmentation Of Global Law, Andreas Fischer-Lescano, Gunther Teubner

Michigan Journal of International Law

Predictions of future events tend to be a rarity within the social sciences. It is an even more rare occurrence when predicted events come to pass. Niklas Luhmann's prediction on the future of global law is a memorable exception. In 1971, while theorizing on the concept of world society, Luhmann allowed himself the "speculative hypothesis" that global law would experience a radical fragmentation, not along territorial, but along social sectoral lines. The reason for this would be a transformation from normative (politics, morality, law) to cognitive expectations (economy, science, technology); a transformation that would be effected during the transition from …

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