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  • 1
    Electronic Resource
    Electronic Resource
    Electrical resistivity tomography survey for delineating uncharted mine galleries in West Bengal, India* (1999)
    Oxford BSL : Blackwell Science Ltd
    Geophysical prospecting 47 (1999), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The history of subsidence, fires, flooding and other kinds of environmental hazards related to shallow coal workings in India goes back to colonial times some 300 years ago. As coal production accelerated in modern times, so did the environmental and socio-economic drawbacks related to exploitation. In the mid-1980s, a hydropneumatic sand-stowing method was developed to fill in abandoned galleries but their exact location had to be known. Unfortunately, most of these old workings are uncharted and consequently large tracts of land cannot be stabilized. A research programme making use of integrated surface, borehole and cross-hole geophysical methods was undertaken over a five-year span to try to solve this problem. Surface geophysical methods, being cheaper and faster than their cross- and downhole counterparts, were used to cover larger areas on an exploratory basis, while cross-hole methods were employed to locate more accurately one or a network of galleries to be perforated by drillhole(s) and used as a conduit for sand stowing.We report the results of one of the cross-hole geophysical methods: electrical resistivity tomography (ERT). A pole–dipole configuration is used and both cross-hole and surface-borehole methodologies are tested. Forward modelling and inversion of synthetic data making use of downhole and surface physical and geometrical parameters are presented first. This phase is followed by the inversion of real data. It is concluded that ERT is not applicable for the detection of dry voids, but is effective in a waterlogged environment which is estimated to represent 85–90% of the cases. In waterlogged galleries, ERT is applicable in both cross-hole and surface-downhole modes, the latter allowing a larger surface coverage at low cost. ERT is thus a reliable geophysical tool to image water-filled voids and an adequate technique to address environmental and geotechnical problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2478.1999.00126.x
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  • 2
    Electronic Resource
    Electronic Resource
    Simple water flow control for the Coulson electrolytic conductivity detector (1975)
    s.l. : American Chemical Society
    Analytical chemistry 47 (1975), S. 367-368 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60352a035
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  • 3
    Electronic Resource
    Electronic Resource
    INTERFERENCE BY ASCORBIC ACID IN THE DETERMINATION OF NITRITE BY THE SEPARATE COLOR REAGENT ADDITION TECHNIQUE (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food safety 1 (1978), S. 0 
    Details
    ISSN: 1745-4565
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A study was carried out to determine if the presence of ascorbic acid interferes with the colorimetric determination of nitrite by the technique of separate addition of color reagents. It was shown that ascorbate can destroy some of the nitrite during pre-incubation with sulfanilamide, one of the color reagents used to form the diazo compound. An alternative method of analysis is suggested in which ascorbic acid, in the concentration range normally found in foods and cured meat products, does not interfere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4565.1978.tb00279.x
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  • 4
    Electronic Resource
    Electronic Resource
    Origin of N-Nitrosomorpholine Contamination in Margarine (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 51 (1986), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Previous studies have indicated that certain margarine samples may contain traces (∼ 1 ppb) of NMOR. The results of this present study indicated that packaging papers were the source of the contamination. Waxed wrappings and margarine samples taken from 1 cm outer layer of margarine blocks were found to contain NMOR, but those taken from the center of the margarine blocks were always negative. This suggests migration of NMOR from wrappings to the outer layers of the margarine blocks. Samples packaged in aluminum-backed papers, specially coated waxed papers, or plastic containers were negative as determined by Thermal Energy Analyzer technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1986.tb10873.x
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  • 5
    Electronic Resource
    Electronic Resource
    Analysis and Significance of Tyramine in Foods (1969)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 34 (1969), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: SUMMARY— The tyramine levels in different varieties of cheeses, alcoholic drinks, and other foods were determined. Many of the food samples, analyzed by an existing fluorometric method, contained large amounts (up to 2.2 mg/g) of tyramine. Synephrine and octopamine, although rarely present in food, interfered with the fluorometric analysis. A gas chromatographic method was developed in which tyramine was extracted from foods and then analyzed as its trifluoroacetyl derivative using an electron capture detector. The gas chromatographic method was more sensitive and specific than the fluorometric method, and it permitted detection of 0.1–0.2 nanogram tyramine even in the presence of synephrine and octopamine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1969.tb14354.x
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  • 6
    Electronic Resource
    Electronic Resource
    N-Nitrosothiazolidine and N-Nitrosothiazolidine-4-Carboxylic Acid in Smoked Meats and Fish (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 51 (1986), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Various smoked meats including raw and fried bacon and both unsmoked and smoked (uncured) fish were analyzed for NThZ and NTCA. Most meat samples, bacons, and a few smoked fish contained traces of NThZ and considerably high (up to 13,700 ppb) levels of NTCA. Preliminary results indicated that raw bacons processed by old-fashioned direct smoking methods contained the highest (〉 1,000 ppb) level of NTCA. Formation of NThZ from the NTCA present in smoked bacon increased with an increase in frying temperature as well as with frying time. NTCA level in the raw bacon and the cooking conditions seemed to be the most important factors involved in the formation of NThZ in the fried bacon. The reason for finding only insignificant levels of NThZ in smoked fish could not be established conclusively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1986.tb13940.x
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  • 7
    Electronic Resource
    Electronic Resource
    Fœtal Hæmoglobin in the Monkey (1960)
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 977-978 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Electrophoretic mobilities of hemoglobin from adult and new-born monkeys Fig. 1 shows the electrophoretic mobilities of haemoglobin from adult and new-born monkeys. Haemoglobins from both the adult and the new-born monkeys consist of one component only and have identical electrophoretic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/186977a0
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  • 8
    Electronic Resource
    Electronic Resource
    Formation of Nitrosamines in a Meat Curing Mixture (1973)
    [s.l.] : Nature Publishing Group
    Nature 245 (1973), S. 104-105 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 NPy and NPi in Mettwurst Sausages Manufacturer NPy (p.p.m.) NPi (p.p.m.) A 0.018 0.06* 0.014 0.05* 0.105* ? 0.02 0.05* B 0.013 Tracet C 0.024 Nt D, E, F N N * Confirmed by GLC-mass spectrometry2. ? Less than 0.02 p.p.m. ? N, None ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/245104a0
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  • 9
    Electronic Resource
    Electronic Resource
    Scientific Societies in India (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 1250-1252 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] RECENT investigations of the sociology of science have suggested a major shift in the organization of science and scientists. The general suggestion is that although science previously was a closed system1, now it is not so. Science is now a part of society and, as such, is subjected to the same ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2041250a0
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  • 10
    Electronic Resource
    Electronic Resource
    Uniform Propagation of Flame. (1931)
    [s.l.] : Nature Publishing Group
    Nature 127 (1931), S. 125-126 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MASON and Wheeler,1 following the initial observation of Mallard and Le Chatelier, considered that when a gaseous explosive mixture is suitably ignited at the open end of a horizontal glass tube, the other end of which is closed, flame travels at a uniform speed for some ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/127125c0
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