Metal accumulation in intertidal marshes: Role of sulphide precipitation

Wetlands ◽  
2008 ◽  
Vol 28 (3) ◽  
pp. 735-746 ◽  
Author(s):  
Gijs Laing ◽  
Benjamin Meyer ◽  
Erik Meers ◽  
Els Lesage ◽  
Annelies Moortel ◽  
...  
Keyword(s):  
Metal Accumulation ◽  
Sulphide Precipitation ◽  
Intertidal Marshes

scholarly journals Metals and Neurodegeneration

F1000Research ◽  
2016 ◽  
Vol 5 ◽  
pp. 366 ◽  
Author(s):  
Pan Chen ◽  
Mahfuzur Rahman Miah ◽  
Michael Aschner
Keyword(s):  
Metal Accumulation ◽  
Neurological Diseases ◽  
Cell Structure ◽  
Antioxidant Response ◽  
Autism Spectrum ◽  
Metal Exposure ◽  
Gulf War Syndrome ◽  
Guillain Barré ◽  
Lateral Sclerosis

Metals play important roles in the human body, maintaining cell structure and regulating gene expression, neurotransmission, and antioxidant response, to name a few. However, excessive metal accumulation in the nervous system may be toxic, inducing oxidative stress, disrupting mitochondrial function, and impairing the activity of numerous enzymes. Damage caused by metal accumulation may result in permanent injuries, including severe neurological disorders. Epidemiological and clinical studies have shown a strong correlation between aberrant metal exposure and a number of neurological diseases, including Alzheimer’s disease, amyotrophic lateral sclerosis, autism spectrum disorders, Guillain–Barré disease, Gulf War syndrome, Huntington’s disease, multiple sclerosis, Parkinson’s disease, and Wilson’s disease. Here, we briefly survey the literature relating to the role of metals in neurodegeneration.

Essentiality of nickel and homeostatic mechanisms for its regulation in terrestrial organisms

2002 ◽  
Vol 10 (4) ◽  
pp. 209-261 ◽  
Author(s):  
T Phipps ◽  
S L Tank ◽  
J Wirtz ◽  
L Brewer ◽  
A Coyner ◽  
...  
Keyword(s):  
Metal Accumulation ◽  
Essential Element ◽  
Trophic Levels ◽  
Anthropogenic Sources ◽  
Transport Systems ◽  
Naturally Occurring ◽  
Single Organism ◽  
A Minor ◽  
Uptake And Transport

Nickel (Ni) is a naturally occurring element with many industrial uses, including in stainless steel, electroplating, pigments, and ceramics. Consequently, Ni may enter the environment from anthropogenic sources, resulting in locally elevated concentrations in soils. However, Ni is a minor essential element, and, therefore, biota have established systems that maintain Ni homeostasis. This paper discusses the role of Ni as an essential element and reviews storage, uptake, and transport systems used to maintain homeostasis within terrestrial biota. The bioaccumulation and distribution of metals in these organisms are also addressed. In all cases, information on Ni essentiality is very limited compared to other essential metals. However, the available data indicate that Ni behaves in a similar manner to other metals. Therefore, inferences specific to Ni may be made from an understanding of metal homeostasis in general. Nevertheless, it is evident that tissue and organ Ni concentrations and requirements vary considerably within and between species, and metal accumulation in various tissues within a single organism differs as well. High rates of Ni deposition around smelters indicate that Ni in acidic soils may reach concentrations that are toxic to plants and soil decomposers. However, with the exception of hyperaccumulator plants, Ni does not biomagnify in the terrestrial food web, suggesting that toxicity to higher trophic levels is unlikely.Key words: nickel, essentiality, homeostasis, bioaccumulation, uptake, transport.

The role of urban air pollutants on the performance of heavy metal accumulation in Usnea amblyoclada

2005 ◽  
Vol 97 (1) ◽  
pp. 50-57 ◽  
Author(s):  
Hebe A. Carreras ◽  
Eduardo D. Wannaz ◽  
Carlos A. Perez ◽  
María L. Pignata
Keyword(s):  
Heavy Metal ◽  
Air Pollutants ◽  
Metal Accumulation ◽  
Heavy Metal Accumulation ◽  
Urban Air

Role of antioxidants in Cr tolerance of three crop plants: Metal accumulation in seeds

2009 ◽  
Vol 72 (4) ◽  
pp. 1111-1121 ◽  
Author(s):  
Sarita Sinha ◽  
Shraddha Singh ◽  
Shekhar Mallick ◽  
Geetgovind Sinam
Keyword(s):  
Metal Accumulation ◽  
Crop Plants
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