The Biogeochemistry Of Cobalt In The Sargasso Sea

Author : Mak A. Saito
Publisher : Unknown
Page : 834 pages
File Size : 54,5 Mb
Release : 2001
Category : Bioaccumulation
ISBN : UCSD:31822009324211

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The Biogeochemistry of Cobalt in the Sargasso Sea by Mak A. Saito Pdf

Processes that enable marine phytoplankton to acquire trace metals are fundamental to our understanding of primary productivity and global carbon cycling. This thesis explored the biogeochemistry of cobalt using analytical chemistry and physiological experiments with the dominant phytoplankton species, Prochlorococcus. A high sensitivity method for Co speciation was developed using hanging mercury drop cathodic stripping voltammetry. Dissolved Co at the Bermuda Atlantic Time Series station (BATS) in the Sargasso Sea was bound by strong organic complexes with a conditional stability constant of logK=16.3 +/- 0.9. Biweekly time series measurements of total cobalt near Bermuda from the MITESS sampler were 0-47pM throughout 1999, and averaged 20 +/- 10pM in 1999. A transect of total cobalt from BATS to American coastal waters ranged from 19-133pM and correlated negatively with salinity (r(sup 2)=0.93). Prochlorococcus strains MED4-Ax and SS120 showed an absolute requirement for Co, despite replete Zn. Co-57 uptake rates and growth rates were enhanced by additions of filtered low Co cultures, suggesting that a ligand is present that facilitates Co uptake. Co-limited Prochlorococcus cultures exhibited an increase in the fraction of cells in G2 relative to other cell cycle stages during exponential growth, and the durations of this stage increased with decreasing cobalt concentrations.

Author : H. Elderfield
Publisher : Elsevier
Page : 668 pages
File Size : 47,8 Mb
Release : 2006-06-20
Category : Business & Economics
ISBN : 0080451012

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The Oceans and Marine Geochemistry by H. Elderfield Pdf

The Treatise on Geochemistry is the first work providing a comprehensive, integrated summary of the present state of geochemistry. It deals with all the major subjects in the field, ranging from the chemistry of the solar system to environmental geochemistry. The Treatise on Geochemistry has drawn on the expertise of outstanding scientists throughout the world, creating the reference work in geochemistry for the next decade. Each volume consists of fifteen to twenty-five chapters written by recognized authorities in their fields, and chosen by the Volume Editors in consultation with the Executive Editors. Particular emphasis has been placed on integrating the subject matter of the individual chapters and volumes. Elsevier also offers the Treatise on Geochemistry in electronic format via the online platform ScienceDirect, the most comprehensive database of academic research on the Internet today, enhanced by a suite of sophisticated linking, searching and retrieval tools.

Author : Anonim
Publisher : Newnes
Page : 17318 pages
File Size : 49,5 Mb
Release : 2013-10-19
Category : Science
ISBN : 9780080983004

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Treatise on Geochemistry by Anonim Pdf

This extensively updated new edition of the widely acclaimed Treatise on Geochemistry has increased its coverage beyond the wide range of geochemical subject areas in the first edition, with five new volumes which include: the history of the atmosphere, geochemistry of mineral deposits, archaeology and anthropology, organic geochemistry and analytical geochemistry. In addition, the original Volume 1 on "Meteorites, Comets, and Planets" was expanded into two separate volumes dealing with meteorites and planets, respectively. These additions increased the number of volumes in the Treatise from 9 to 15 with the index/appendices volume remaining as the last volume (Volume 16). Each of the original volumes was scrutinized by the appropriate volume editors, with respect to necessary revisions as well as additions and deletions. As a result, 27% were republished without major changes, 66% were revised and 126 new chapters were added. In a many-faceted field such as Geochemistry, explaining and understanding how one sub-field relates to another is key. Instructors will find the complete overviews with extensive cross-referencing useful additions to their course packs and students will benefit from the contextual organization of the subject matter Six new volumes added and 66% updated from 1st edition. The Editors of this work have taken every measure to include the many suggestions received from readers and ensure comprehensiveness of coverage and added value in this 2nd edition The esteemed Board of Volume Editors and Editors-in-Chief worked cohesively to ensure a uniform and consistent approach to the content, which is an amazing accomplishment for a 15-volume work (16 volumes including index volume)!

Author : Kristen N. Buck,Maeve C. Lohan,Sylvia G. Sander,Christel Hassler,Ivanka Pižeta
Publisher : Frontiers Media SA
Page : 305 pages
File Size : 47,9 Mb
Release : 2018-01-11
Category : Electronic
ISBN : 9782889453764

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Organic Ligands in Marine Trace Metal Biogeochemistry by Kristen N. Buck,Maeve C. Lohan,Sylvia G. Sander,Christel Hassler,Ivanka Pižeta Pdf

This research topic highlights the most recent accomplishments of a Scientific Committee on Oceanic Research (SCOR) Working Group, SCOR WG 139: Organic Ligands - A Key Control on Trace Metal Biogeochemistry in the Ocean.

Author : Liudmila L. Demina,Sergey V. Galkin
Publisher : Springer
Page : 210 pages
File Size : 42,5 Mb
Release : 2016-07-26
Category : Science
ISBN : 9783319413402

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Trace Metal Biogeochemistry and Ecology of Deep-Sea Hydrothermal Vent Systems by Liudmila L. Demina,Sergey V. Galkin Pdf

This volume synthesizes the relevant data that is fundamental to our understanding of trace metal biogeochemistry and the ecology of biological communities of deep-sea vent systems. It presents the combined results of biological and geochemical research and analyzes the microdistribution of animals and the spatial structure of vent communities. Careful consideration is given to the export of iron and other trace metals from hydrothermal vents. The environmental conditions to be found in deep-sea hydrothermal community habitats, along with the trace metal behavior in biotope water are characterized and the sources and forms of trace metals taken up by dominant hydrothermal vent animals are discussed. Special attention is paid to the poorly investigated deep biosphere of the sub-seafloor igneous crust. The book is illustrated with a wealth of exceptional deep-sea photos taken by the manned submersible “Mir”, and a dedicated chapter focuses on the role of deep manned submersibles in ocean research. The book will be of interest to researchers and students in the fields of oceanography, geochemistry, biology, the environmental sciences and marine ecology.

Author : Caroline Beth Tuit
Publisher : Unknown
Page : 278 pages
File Size : 55,7 Mb
Release : 2003
Category : Marine sediments
ISBN : UCSD:31822032512428

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The Marine Biogeochemistry of Molybdenum by Caroline Beth Tuit Pdf

(Cont.) Mn oxides were not found to significantly influence either the dissolved or SPM Mo distribution. Dissolved Mo profiles from the Sargasso and Arabian Sea were conservative. However, dissolved Mo profiles from the Eastern Tropical Pacific showed both depletion and enrichment of dissolved Mo possibly associated with interaction of Mo with coastal sediments. Dissolved Mo profiles in several California Borderland Basins showed 1-2 nM Mo depletions below sill depth. A more focused study of water column response to sediment fluxes using the high precision Mo analyses is necessary to determine whether these phenomena are related.

Author : W.H. Schlesinger,Emily S. Bernhardt
Publisher : Academic Press
Page : 765 pages
File Size : 40,7 Mb
Release : 2020-08-07
Category : Science
ISBN : 9780128146095

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Biogeochemistry by W.H. Schlesinger,Emily S. Bernhardt Pdf

Biogeochemistry: An Analysis of Global Change, Fourth Edition, considers how the basic chemical conditions of the Earth, from atmosphere to soil to seawater, have been, and are being, affected by the existence of life. Human activities in particular, from the rapid consumption of resources to the destruction of the rainforests and the expansion of smog-covered cities, are leading to rapid changes in the basic chemistry of the Earth. The new edition features expanded coverage of topics, including the cryosphere, the global hydrogen cycle, biomineralization and the movement of elements across landscapes and continents by organisms and through global trade. The book will help students and researchers extrapolate small-scale examples to a global level. With cross-referencing of chapters, figures and tables, and an interdisciplinary coverage of the topic, this updated edition provides an excellent framework for examining global change and environmental chemistry. Includes an extensive review and up-to-date synthesis of the current literature on the Earth's biogeochemistry Synthesizes the global cycles of carbon, nitrogen, phosphorous and sulfur, and suggests the best current budgets for atmospheric gases such as ammonia, nitrous oxide, dimethyl sulfide, and carbonyl sulfide Features updated literature references and expanded coverage of topics, including the cryosphere, the global hydrogen cycle, biomineralization and the movement of elements across landscapes and continents by organisms and through global trade

Author : Johan Schijf,Catherine Jeandel,Karen Johannesson,Anne H. Osborne
Publisher : Frontiers Media SA
Page : 197 pages
File Size : 41,7 Mb
Release : 2020-05-05
Category : Electronic
ISBN : 9782889636556

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REE Marine Geochemistry in the 21st Century: A Tribute to the Pioneering Research of Henry Elderfield (1943–2016) by Johan Schijf,Catherine Jeandel,Karen Johannesson,Anne H. Osborne Pdf

Author : Dennis A. Hansell,Craig A. Carlson
Publisher : Elsevier
Page : 807 pages
File Size : 47,6 Mb
Release : 2002-07-06
Category : Science
ISBN : 9780080500119

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Biogeochemistry of Marine Dissolved Organic Matter by Dennis A. Hansell,Craig A. Carlson Pdf

Interest in marine dissolved organic matter (DOM) is very high because it plays an important role in oceanic and global carbon cycling, which in turn impacts weather. Understanding the processes involved in the transformations of carbon, phosphorus, nitrogen, and other major elements in the oceans has been a primary goal of marine biogeochemists and oceanographers over the past decade.This book, in 16 chapters with over 170 figures and tables, reports on the major advances in this area by a distinguished group of international chemical and biological oceanographers. Additionally, it focuses on the role of DOM in elemental cycling - where the greatest informational need currently exists. Biological cycling of the major elements through DOM is assessed throughout, with particular emphasis on the role of marine microbes as active agents in the processing of this materialThe ocean science community's advances for inclusion of DOM in both ecosystem and global circulation models are evaluated

Author : Christel Hassler,Martha Gledhill,Veronique Schoemann
Publisher : Frontiers E-books
Page : 207 pages
File Size : 54,7 Mb
Release : 2013-07-05
Category : Electronic
ISBN : 9782889191307

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Environmental Bioinorganic Chemistry of Aquatic Microbial Organisms by Christel Hassler,Martha Gledhill,Veronique Schoemann Pdf

The Environmental Bioinorganic Chemistry of Aquatic Microbial Organisms describes the interactions between metals and aquatic prokaryotic and eukaryotic microorganisms in their environment. Metals influence microbial growth in the aquatic environment as they can be either toxic to aquatic microbes, if present at too high concentrations in the environment, or limiting, if bio-essential and present at very low concentrations. In turn, microorganisms influence the biogeochemical cycling of metals as they affect trace metal concentrations, distributions between particulate and dissolved phase, and chemical speciation. At the sub cellular level, metalloproteins are the catalysts driving many steps in the biogeochemical cycles of major elements such as carbon, nitrogen and sulfur. Metals thus provide a link between the abundance and activity of enzymes, the growth of microorganisms, and the biogeochemical cycles of major climate influencing elements. Furthermore, the evolution of the chemistry of aquatic environments and atmosphere has left its mark on the microbial proteome as a direct result of changes in the solubility of metals. The aquatic microbial metallome thus has the potential to reveal information about key biogeochemical processes, their spatial and seasonal occurrence, and also to reveal how the geochemical environment is shaping the microbial population itself. The aim of this Research Topic is to highlight recent advances in our understanding of how metals influence the activity of aquatic microbes, and how microbes influence the biogeochemical cycling of metals. Applications of techniques in proteomics, spectroscopy, mass spectrometry and genomics are all leading to a greater understanding of the interactions between the microbial metallome and the “aquatic metallome” and thus the influence of metals on the biogeochemical cycles of climatically important elements such as carbon, nitrogen and sulfur. Both reviews and original research on the occurrence and abundance of microbial metal proteins and peptides, the utilisation of metals by aquatic microbes, the influence of microbially produced exudates on metal speciation and the biogeochemical cycling, and the toxicity of metals to microbial organisms are welcome.

Author : Maria Josefina Olascoaga,Sharon Z. Herzka,M. Leopoldina Aguirre-Macedo,Francisco Delgadillo-Hinojosa
Publisher : Frontiers Media SA
Page : 259 pages
File Size : 45,8 Mb
Release : 2023-12-11
Category : Science
ISBN : 9782832540282

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Novel Insights into the Circulation, Biogeochemistry, and Ecosystem Function of the Gulf of Mexico: A Perspective from Mexican Waters in Support of Oil Spill Preparedness by Maria Josefina Olascoaga,Sharon Z. Herzka,M. Leopoldina Aguirre-Macedo,Francisco Delgadillo-Hinojosa Pdf

In response to the Deepwater Horizon oil spill in the Gulf of Mexico (GoM), and given the increased activities of the offshore oil industry, an international multidisciplinary consortium - the CIGOM Consortium - was funded by Mexico's Energy Secretariat (SENER) and its National Council for Science and Technology (CONACyT). Spanning 2015-2022, CIGOM's goals were to establish an environmental baseline to characterize the southern GOM’s natural variability and contribute to the understanding of ecosystem function, use cutting-edge technologies to observe the ocean, couple physical circulation and biogeochemical models to gain understating of oceanographic processes, generate oil spill scenarios using model ensembles and statistical techniques and conducting vulnerability assessments. Over 300 researchers participated in the CIGOM consortium's efforts.

Author : Egon T. Degens
Publisher : Springer Science & Business Media
Page : 432 pages
File Size : 55,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642488795

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Perspectives on Biogeochemistry by Egon T. Degens Pdf

Perspectives on Biogeochemistry is an account of the origin of forces and matter at the dawn of time, and the way they evolved to planet Earth of today. Several fields of natural sciences are consulted to present a coherent view on the cycling of terrestrial elements and molecules, both organic and inorganic, in the course of time. Critical data are drawn together from astronomy, physics, chemistry, biology, and geology in order to provide some understanding of the complexity of the system Earth. In this book, E.T. Degens abstracts his knowledge of biogeochemical interactions acquired in more than thirty years of research and teaching. Students and anyone in the natural sciences wanting to familiarize themselves with phenomena prevailing at the periphery of their disciplines will profit by the very thorough and personal view of this pressing topic.

Author : Anonim
Publisher : Unknown
Page : 682 pages
File Size : 45,5 Mb
Release : 2001
Category : Dissertations, Academic
ISBN : STANFORD:36105112755785

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Dissertation Abstracts International by Anonim Pdf

Author : Michael J.R. Fasham
Publisher : Springer Science & Business Media
Page : 324 pages
File Size : 51,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642558443

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Ocean Biogeochemistry by Michael J.R. Fasham Pdf

Oceans account for 50% of the anthropogenic CO2 released into the atmosphere. During the past 15 years an international programme, the Joint Global Ocean Flux Study (JGOFS), has been studying the ocean carbon cycle to quantify and model the biological and physical processes whereby CO2 is pumped from the ocean's surface to the depths of the ocean, where it can remain for hundreds of years. This project is one of the largest multi-disciplinary studies of the oceans ever carried out and this book synthesises the results. It covers all aspects of the topic ranging from air-sea exchange with CO2, the role of physical mixing, the uptake of CO2 by marine algae, the fluxes of carbon and nitrogen through the marine food chain to the subsequent export of carbon to the depths of the ocean. Special emphasis is laid on predicting future climatic change.

Author : H. Garbis,P. McElhatton,M. Reuvers,E. Robert,M. Rost van Tonningen,A. Scialli,P. Peters,Christof Schaefer
Publisher : Elsevier Science
Page : 1300 pages
File Size : 53,6 Mb
Release : 2001-12-21
Category : Medical
ISBN : 0444507639

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Drugs During Pregnancy and Lactation by H. Garbis,P. McElhatton,M. Reuvers,E. Robert,M. Rost van Tonningen,A. Scialli,P. Peters,Christof Schaefer Pdf

The care of pregnant women presents one of the paradoxes of modern medicine. Women usually require little medical intervention during an (uneventful) pregnancy. Conversely, those at high risk of damage to their own health or that of their unborn require the help of appropriate medicinal technology, including drugs. Accordingly, there are two classes of pregnant women, the larger group requires support but not much intervention, while the other needs the full range of diagnostic and therapeutic measures applied in any other branch of medicine. This book presents the current state of knowledge about drugs in pregnancy. In each chapter information is presented separately for two different aspects of the problem seeking a drug appropriate for prescription during pregnancy, and assessing the risk of a drug when exposure has already taken place. Practising clinicians who prescribe medicinal products to women who are, or who may become, pregnant, will find this volume an invaluable reference.