scholarly journals Limited biogeochemical modification of surface waters by kelp forest canopies: Influence of kelp metabolism and site‐specific hydrodynamics

2021 ◽  
Author(s):  
Sarah B. Traiger ◽  
Brian Cohn ◽  
Demetra Panos ◽  
Margaret Daly ◽  
Heidi K. Hirsh ◽  
...  
Keyword(s):  
Surface Waters ◽  
Kelp Forest ◽  
Forest Canopies ◽  
Site Specific

Regulation of Toxicants in the Australian Environment

2003 ◽  
Vol 56 (3) ◽  
pp. 141 ◽  
Author(s):  
Graeme E. Batley
Keyword(s):  
Surface Waters ◽  
Metal Uptake ◽  
Current Status ◽  
Robust Methods ◽  
Ecological Health ◽  
Site Specific ◽  
Quality Guidelines ◽  
Environmental Guidelines ◽  
Chemical Behaviour ◽  
Single Number

The chemical behaviour of toxicants in the environment is a critical control on their impacts on human and ecological health. The current status of regulations for air, soils, groundwater, surface waters, and sediments in Australia are discussed, with particular focus on metals. It is now recognized that speciation and bioavailability are important in assessing potential effects, yet only now are environmental guidelines addressing these. Recent chemical and ecotoxicological studies of metal bioavailability in waters and sediments investigate robust methods for speciation measurement and report improved models to describe metal uptake and predict toxicity. The way forward with respect to toxicant regulation is a departure from single-number guidelines, to site-specific risk-based assessments, such as those adopted in the new ANZECC/ARMCANZ water quality guidelines.

Evaluation of the Biotic Ligand Model relative to other site-specific criteria derivation methods for copper in surface waters with elevated hardness

2007 ◽  
Vol 84 (2) ◽  
pp. 279-291 ◽  
Author(s):  
Eric Van Genderen ◽  
Robert Gensemer ◽  
Carrie Smith ◽  
Robert Santore ◽  
Adam Ryan
Keyword(s):  
Surface Waters ◽  
Biotic Ligand Model ◽  
Site Specific ◽  
Biotic Ligand ◽  
Ligand Model

Acid Precipitation and Groundwater Chemistry at the Turkey Lakes Watershed

1988 ◽  
Vol 45 (S1) ◽  
pp. s59-s65 ◽  
Author(s):  
D. Craig ◽  
L. M. Johnston
Keyword(s):  
Surface Water ◽  
Surface Waters ◽  
Acid Precipitation ◽  
Groundwater Chemistry ◽  
Groundwater Hydrology ◽  
Site Specific ◽  
Flow Rates ◽  
Turkey Lakes Watershed ◽  
Acid Loading

To determine correctly the response of a basin to various acid loading events, the groundwater hydrology must be considered as a function of the basin stratigraphy and mineralogy. Groundwaters in the Turkey Lakes Watershed are well buffered and in general provide a reservoir of alkalinity for surface waters in the basin. The groundwater chemistry is dominated by the weathering of carbonates present in the tills. Groundwater can follow a variety of pathways through the subsurface. These pathways can have very different flow rates and groundwater chemistry. As a result of this the influence of groundwater on surface water is highly site specific.

scholarly journals Concentration of mercury species in relationship to other site-specific factors in the surface waters of northern Wisconsin lakes

1995 ◽  
Vol 40 (3) ◽  
pp. 556-565 ◽  
Author(s):  
Carl J. Watras ◽  
Kenneth A. Morrison ◽  
Jodi S. Host ◽  
Nicolas S. Bloom
Keyword(s):  
Surface Waters ◽  
Mercury Species ◽  
Site Specific ◽  
Specific Factors

Habitat Association of Klebsiella Species

1985 ◽  
Vol 6 (2) ◽  
pp. 52-58 ◽  
Author(s):  
Susan T. Bagley
Keyword(s):  
Drinking Water ◽  
Gastrointestinal Tract ◽  
Surface Waters ◽  
Industrial Effluents ◽  
Opportunistic Pathogen ◽  
Habitat Associations ◽  
Habitat Association ◽  
Klebsiella Species ◽  
Almost All ◽  
Polluted Waters

AbstractThe genus Klebsiella is seemingly ubiquitous in terms of its habitat associations. Klebsiella is a common opportunistic pathogen for humans and other animals, as well as being resident or transient flora (particularly in the gastrointestinal tract). Other habitats include sewage, drinking water, soils, surface waters, industrial effluents, and vegetation. Until recently, almost all these Klebsiella have been identified as one species, ie, K. pneumoniae. However, phenotypic and genotypic studies have shown that “K. pneumoniae” actually consists of at least four species, all with distinct characteristics and habitats. General habitat associations of Klebsiella species are as follows: K. pneumoniae—humans, animals, sewage, and polluted waters and soils; K. oxytoca—frequent association with most habitats; K. terrigena— unpolluted surface waters and soils, drinking water, and vegetation; K. planticola—sewage, polluted surface waters, soils, and vegetation; and K. ozaenae/K. rhinoscleromatis—infrequently detected (primarily with humans).

Identifying Sources of Sulfate Aerosols Reaching Whiteface Mountain, NY

1985 ◽  
Vol 43 ◽  
pp. 98-101
Author(s):  
James S. Webber
Keyword(s):  
Trace Metals ◽  
Acid Deposition ◽  
Surface Waters ◽  
Dry Deposition ◽  
Coal Combustion ◽  
Public Awareness ◽  
Sulfate Aerosols ◽  
Wet And Dry Deposition ◽  
Whiteface Mountain ◽  
Toxic Trace Metals

INTRODUCTION“Acid rain” and “acid deposition” are terms no longer confined to the lexicon of atmospheric scientists and 1imnologists. Public awareness of and concern over this phenomenon, particularly as it affects acid-sensitive regions of North America, have increased dramatically in the last five years. Temperate ecosystems are suffering from decreased pH caused by acid deposition. Human health may be directly affected by respirable sulfates and by the increased solubility of toxic trace metals in acidified waters. Even man's monuments are deteriorating as airborne acids etch metal and stone features.Sulfates account for about two thirds of airborne acids with wet and dry deposition contributing equally to acids reaching surface waters or ground. The industrial Midwest is widely assumed to be the source of most sulfates reaching the acid-sensitive Northeast since S02 emitted as a byproduct of coal combustion in the Midwest dwarfs S02 emitted from all sources in the Northeast.

Large-cluster and combined fluorescent and gold immunoprobes

1996 ◽  
Vol 54 ◽  
pp. 892-893
Author(s):  
Richard D. Powell ◽  
James F. Hainfeld ◽  
Carol M. R. Halsey ◽  
David L. Spector ◽  
Shelley Kaurin ◽  
...  
Keyword(s):  
Metal Cluster ◽  
Sulfonyl Chloride ◽  
Gel Filtration ◽  
Cross Linking ◽  
Site Specific ◽  
Fab Fragments ◽  
Cluster Label ◽  
Covalently Linked ◽  
Texas Red ◽  
Fold Excess

Two new types of covalently linked, site-specific immunoprobes have been prepared using metal cluster labels, and used to stain components of cells. Combined fluorescein and 1.4 nm “Nanogold” labels were prepared by using the fluorescein-conjugated tris (aryl) phosphine ligand and the amino-substituted ligand in the synthesis of the Nanogold cluster. This cluster label was activated by reaction with a 60-fold excess of (sulfo-Succinimidyl-4-N-maleiniido-cyclohexane-l-carboxylate (sulfo-SMCC) at pH 7.5, separated from excess cross-linking reagent by gel filtration, and mixed in ten-fold excess with Goat Fab’ fragments against mouse IgG (obtained by reduction of F(ab’)2 fragments with 50 mM mercaptoethylamine hydrochloride). Labeled Fab’ fragments were isolated by gel filtration HPLC (Superose-12, Pharmacia). A combined Nanogold and Texas Red label was also prepared, using a Nanogold cluster derivatized with both and its protected analog: the cluster was reacted with an eight-fold excess of Texas Red sulfonyl chloride at pH 9.0, separated from excess Texas Red by gel filtration, then deprotected with HC1 in methanol to yield the amino-substituted label.

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