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Please use this identifier to cite or link to this item:
http://krishi.icar.gov.in/jspui/handle/123456789/32959
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DC Field | Value | Language |
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dc.contributor.author | ICAR_CRIDA | en_US |
dc.date.accessioned | 2020-02-25T09:28:08Z | - |
dc.date.available | 2020-02-25T09:28:08Z | - |
dc.date.issued | 2008-01-01 | - |
dc.identifier.citation | Not Available | en_US |
dc.identifier.issn | Not Available | - |
dc.identifier.uri | http://krishi.icar.gov.in/jspui/handle/123456789/32959 | - |
dc.description | Not Available | en_US |
dc.description.abstract | It is a general belief that the fruits and vegetables that our parents ate when they were growing up were more nutritious and enriched with essential mineral nutrients and were less contaminated with toxic trace elements than the ones that are being consumed by us currently. A study of the mineral content of fruits and vegetables grown in Great Britain between 1930 and 1980 has added weight to that belief with findings of such decreases in nutrient density. The study, conducted by scientists in Great Britain, found significantly lower levels of calcium, magnesium, copper, and sodium in vegetables, as well as significantly lower levels of magnesium, iron, copper and potassium in fruits. Research studies are showing that the reducing nutritional value and the problem of contamination associated with food quality is increasing at an alarming rate. The decline in quality of agricultural produce has corresponded to the period of increased industrialization of our farming systems, where emphasis has been on cash crop cultivation that demands high doses of agrochemicals—that is, fertilizers and pesticides. Several of the trace elements are essential for human as well as animal health. However, nutritionally important trace elements are deficient in soils in many regions of the world and the health problems associated with an excess, deficiency, or uneven distribution of these essential trace elements in soils are now a major public health issue in many developing countries. Therefore, the development of “foods and animal feeds” fortified with essential nutrients is now one of the most attractive research fields globally. In order to achieve this, knowledge of the traditional forms of agriculture, along with conservation, greater use of native bio-geo-diversity, and genetic diversity analysis of the cultivable crops, is a must. A number of trace elements serve as cofactors for various enzymes and in a variety of metabolic functions. Trace elements accumulated in medicinal plants have the healing power for numerous ailments and disorders. Trace elements are implicated in healing function and neurochemical transmission (Zn on synaptic transmission); Cr and Mn can be correlated with therapeutic properties against diabetic and cardiovascular diseases. Certain transition group elements regulate hepatic synthesis of cholesterol. Nutrinogenomics, pharmacogenomics, and metallomics are now emerging as new areas of research with challenging tasks ahead. Soil, sediment, and urban dust, which originate primarily from the Earth’s crust, is the most pervasive and important factor affecting human health and well-being. Trace element contamination is a major concern because of toxicity and the threat to human life and the environment. A variety of elements commonly found in the urban environment originate technogenically. In an urban environment, exposure of xxiii human beings to trace elements takes place from multiple sources, namely, water transported material from surrounding soils and slopes, dry and wet atmospheric deposition, biological inputs, road surface wear, road paint degradation, vehicle wear (tyres, body, brake lining, etc.), and vehicular fluid and particulate emissions. Lead and cadmium are the two elements that are frequently studied in street dust, but very little attention has been given to other trace elements such as Cr, Cu, Zn, and Ni, which are frequently encountered in the urban environment. Street dusts often contain elevated concentrations of a range of toxic elements, and concerns have been expressed about the consequences for both environmental quality and human health, especially of young children because of their greater susceptibility to a given dose of toxin and the likelihood to ingest inadvertently significant quantities of dust. Sediment and dust transported and stored in the urban environment have the potential to provide considerable loadings of heavy metals to receiving water and water bodies, particularly with changing environmental conditions. On land, vegetables and fruits may be contaminated with surficial deposits of dusts. Environmental and health effects of trace metal contaminants in dust are dependent, at least initially, on the mobility and availability of the elements, and mobility and availability is a function of their chemical speciation and partitioning within or on dust matrices. The identification of the main binding sites and phase associations of trace metals in soils and sediments help in understanding geochemical processes and would be helpful to assess the potential for remobilization with changes in surrounding chemistry (especially pH and Eh). Sophisticated analytical and speciation techniques and synchrotron research are being applied to this field of research in developed nations. This book covers both the benefits of trace elements and potential toxicity and impact of trace elements in the environment in the chosen topics by leaders of the world in this area. | en_US |
dc.description.sponsorship | Not Available | en_US |
dc.language.iso | English | en_US |
dc.publisher | ICAR_CRIDA | en_US |
dc.relation.ispartofseries | Not Available; | - |
dc.subject | Elements,Contaminants,Nutrients,Consequences,Ecosystems,Human Health | en_US |
dc.title | Trace Elements as Contaminants and Nutrients: Consequences in Ecosystems and Human Health | en_US |
dc.title.alternative | Trace Elements as Contaminants and Nutrients: Consequences in Ecosystems and Human Health | en_US |
dc.type | Book | en_US |
dc.publication.projectcode | Not Available | en_US |
dc.publication.journalname | Not Available | en_US |
dc.publication.volumeno | Not Available | en_US |
dc.publication.pagenumber | Not Available | en_US |
dc.publication.divisionUnit | Not Available | en_US |
dc.publication.sourceUrl | Not Available | en_US |
dc.publication.authorAffiliation | ICAR_CRIDA | en_US |
dc.ICARdataUseLicence | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf | en_US |
Appears in Collections: | NRM-CRIDA-Publication |
Files in This Item:
File | Description | Size | Format | |
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Trace Elements as Contaminants and Nutrients Consequences in Ecosystems and Human Health.pdf | 250.68 kB | Adobe PDF | View/Open |
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