Search Results - (Author, Cooperation:M. Farago)

2012-10-02

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

*Alleles ; Animals ; *Cell Lineage ; Chromatin Immunoprecipitation ; Clone Cells/cytology/immunology/metabolism ; DNA Replication Timing ; Female ; Gene Rearrangement, B-Lymphocyte, Light Chain/*genetics ; Hematopoiesis ; Humans ; Immunoglobulin kappa-Chains/*genetics/immunology ; Male ; Mice ; Mice, Inbred BALB C ; Models, Animal ; Models, Immunological ; Precursor Cells, B-Lymphoid/*cytology/immunology/*metabolism ; Stochastic Processes

0020-1693

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Chemistry and Pharmacology

Electronic Resource

0022-2828

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Medicine

Electronic Resource

0022-2828

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Medicine

Electronic Resource

1476-4687

Nature Archives 1869 - 2009

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

[Auszug] Cometary ions are created from cometary neutrals by photo-ionization and charge exchange with solar-wind particles. The newly created cometary ions are approximately at rest; they are then accelerated by the solar-wind electric field, E, resulting at first in cycloidal motion in the E x B ...

Electronic Resource

1573-2959

River Yamuna ; Eichhornia crassipes ; waste water

Springer Online Journal Archives 1860-2000

Energy, Environment Protection, Nuclear Power Engineering

Abstract River Yamuna, like most of the major rivers of India, has become increasingly polluted over the years from both point and non-point sources, particularly in the urban sectors such as Delhi. Field studies, conducted in January, 1994 have investigated the impact of wastewater discharges from four major drains (Najafgarh, Power House, Barapula, Kalkaji) on the overbanks, floodplains and Eichhornia in River Yamuna in Delhi, with particular reference to elemental contamination. It is concluded that except for Cd and Co, overall mean soil concentrations along the full stretch of the river in Delhi are within the world background levels of uncontaminated soils. However, the wastewater discharges from the drains, with the exception of Barapula drain, generally increase the elemental concentrations of overbank soils downstream of the discharges. Eichhornia plants growing along the banks receiving wastewaters from the Najafgarh and Barapula drains are unhealthy and reduced in population which can be attributed to a combination of alkaline pH of the growth medium, metal toxicity and high BOD at the site receiving effluents from the Najafgarh drain, and alkaline pH, metal toxicity and the turbid conditions of water with fly ash particle deposition on the plant surfaces at the site receiving effluents from the Barapula drain. Generally, considering the entire stretch of the river in Delhi, the roots of these plants growing on the overbank soils are found to be accumulators of all elements except Co, Al and Fe, with Co uptake being minimal. There are marked differences in elemental uptake of the water hyacinths growing on the overbanks and floodplains of the river.

Electronic Resource

1573-2959

Brassica juncea ; Eichhornia crassipes ; electrostatic precipitators (esp) ; fly ash ; Indraprastha Power Station (IPP Stn) ; Rajghat Power House (RPH) ; River Yamuna

Springer Online Journal Archives 1860-2000

Energy, Environment Protection, Nuclear Power Engineering

Abstract Indraprastha Power Station (IPP Stn) and Rajghat Power House (RPH), owned by Delhi Electric Supply Undertaking, are both coal-fired power stations located on Ring Road in New Delhi. Ash content of the coal used ranges between 38–47%. The ash is collected in electrostatic precipitators which have an efficiency of 99.3% (IPP station), and 99.7% (RPH). There are instances of major dust pollution around the power stations from fly ash dispersal. The main method of disposal of fly ash from the power stations is by mixing with water, the resultant slurry is pumped through pipes to ash disposal ponds. The supernatant from these ponds is discharged into River Yamuna. Field studies have revealed large quantities of fly ash being deposited into the river. Local populations of Eichhornia crassipes have reduced dramatically between 1987–1995, with a marked reduction in the year 1994–1995. Field studies, conducted in January, 1995 have investigated the impact of fly ash dispersal in the Delhi region with particular reference to metal contamination. Elemental concentrations for a range of elements are determined by ICP-AES in fly ash and top soils along four transects from the power stations up to a distance of 8 km. The effects of fly ash leachates from the ash settling ponds on the river are determined by analyzing river overbank soils and vegetation for their elemental contents. It is concluded that fly ash dispersal from the stacks are a source of alkali, alkaline-earth and to some extent heavy metals in soils in the vicinity of the power stations, and enrichment of elements in river overbank soils are a result of discharge of fly ash leachates from ash disposal ponds. However, the impact from both these sources of metal contamination is not large enough to give cause for concern. Marked reduction in populations of Eichhornia crassipes downstream of the river where it receives leachates from the ash disposal ponds are attributed to turbidity of the ash pond leachates and metal toxicity. Elemental enrichment in the floodplain soils, as a result of fly ash particle deposition during monsoons, may enhance the horticultural value of these soils as is shown by a healthy cultivated crop of Brassica juncea.

Electronic Resource

1573-2983

Springer Online Journal Archives 1860-2000

Geosciences

Medicine

Abstract Some investigations into the pollution by cadmium around smelters have been reviewed. The areas discussed include Japan, the United Kingdom, North America, and Australia. The account describes the various types of investigation carried out. Cadmium levels in soils and in vegetation at various distances from smelters in a number of locations are given. From the results considered, a number of conclusions can be drawn, for example, contamination is mostly aerial and particulate. The extent of pollution from this type of aerial fallout is very dependent upon meteorological conditions and local topography, and generally decreases with distance from the smelter stack.

Electronic Resource

1573-2983

Springer Online Journal Archives 1860-2000

Geosciences

Medicine

Abstract Analyses for nickel, copper, cobalt and zinc of some leaf, stem and root samples ofHybanthus floribundus from the Eastern Goldfields area of Western Australia is reported. All four metals appear to behave differently. Nickel is taken into the roots, but accumulates in the tops. Copper is largely excluded, but is evenly distributed at low levels. Cobalt is taken up to a greater extent than copper and is evenly distributed. Zinc is accumulated in the roots and is largely excluded from the tops. Plant-soil metal concentrations are discussed. Extraction studies show that nickel in the leaves, and to a lesser extent in woody parts, is associated with pectic carbohydrates. Accumulation and selectivity of uptake are discussed.

Electronic Resource

1573-2983

Springer Online Journal Archives 1860-2000

Geosciences

Medicine

Abstract Cadmium, zinc and lead concentrations in soils and plants near a smelter at Avonmouth are reported for samples collected in May 1979 and in May 1980. The total metal soil concentrations fall as distance from the smelter increases and decrease rapidly with depth for cadmium and zinc. The concentrations of these two metals are highly correlated at all depths. Near the smelter, where the carbon content and pH values of the soils are lowest, almost all the cadmium, as measured by EDTA extraction, is available. Concentration of metals in plants also decrease with distance from the smelter, with concentrations being lower in samples collected in 1980. This is possibly due to a seasonal variation in biomass, producing a dilution effect. We conclude that uptake of cadmium and that of zinc by grass species have different relationships to the carbon content of the soil.

Electronic Resource

1573-2983

Springer Online Journal Archives 1860-2000

Geosciences

Medicine

Electronic Resource

1573-2983

Springer Online Journal Archives 1860-2000

Geosciences

Medicine

Abstract A preliminary study of inorganic elements in the river bank soil and plants from the River Yamuna in Delhi has been carried out. Soil at Okhla, near the Water Works plant has a high zinc content (1,215 μg g−1 and this is reflected in the high concentration of zinc (2,029 μg g−1) in Eichhornia plants growing in the river at this point. Although in general the aluminium content of the soils is low in comparison with the world mean, soil near the effluent from the ash settling basins of the Indraprathsa Power Station contains elevated aluminium.Eichhornia plants growing near this effluent are stunted and unhealthy, and is suggested that, taking into account the high pH, possible causes are toxicity from aluminium or boron.

Electronic Resource

1618-2650

Springer Online Journal Archives 1860-2000

Chemistry and Pharmacology

Abstract Concentrations of Pt, Pd, Rh and Au in soils and road dusts taken from areas of high and low traffic flows in the London Borough of Richmond and from a section of the Kingston bypass (A3) at New Malden, Surrey, have been measured. High concentrations of platinum are associated with high traffic densities. Samples taken from streets of lower traffic flows were found to contain the lower concentrations of the ranges. These values correlated well with the levels of lead which were also high at roundabouts. If the preliminary results obtained in this study apply more generally throughout the UK, then the potential for exposure to enhanced levels of Pt would appear to be higher for road users and for those living in urban environments or along major highways.

Electronic Resource

1573-8221

DNA ; fluorometry ; bisBenzimide ; cerebral circulation disorders ; lateral amyotrophic sclerosis

Springer Online Journal Archives 1860-2000

Biology

Medicine

Abstract Measurements of DNA concentrations by fluorescence of the DNA-bisBenzimide complex in the plasma of normal subjects, patients with disorders of cerebral circulation of different severity caused by atherosclerotic involvement of the carotid and/or spinal arteries (after the acute stage of brain stroke), and patients with lateral amyotrophic sclerosis showed a significant increase in its contentvs. the norm. Electrophoresis of DNA isolated from plasma showed that in the patients it is represented not only by long fragments of at least 20,000 bp (which is typical of normal subjects), but also by shorter fragments.

Electronic Resource