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  • 1
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    The neu gene: an erbB-homologous gene distinct from and unlinked to the gene encoding the EGF receptor (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-09-06
    Description: The neu oncogene, identified in ethylnitrosourea-induced rat neuroglioblastomas, had strong homology with the erbB gene that encodes the epidermal growth factor receptor. This homology was limited to the region of erbB encoding the tyrosine kinase domain. It was concluded that the neu gene is a distinct novel gene, as it is not coamplified with sequences encoding the EGF receptor in the genome of the A431 tumor line and it maps to human chromosome 17.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schechter, A L -- Hung, M C -- Vaidyanathan, L -- Weinberg, R A -- Yang-Feng, T L -- Francke, U -- Ullrich, A -- Coussens, L -- CA 39964-01/CA/NCI NIH HHS/ -- GM 26105/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Sep 6;229(4717):976-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2992090" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm/*genetics ; Chromosome Mapping ; Chromosomes, Human, 16-18 ; DNA, Neoplasm/*genetics ; Genes ; Genetic Linkage ; Humans ; Neoplasm Proteins/*genetics ; Neuroblastoma/genetics ; Neuroglia ; *Oncogenes ; Rats ; Receptor, Epidermal Growth Factor ; Receptors, Cell Surface/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
    Electronic Resource
    Electronic Resource
    Alteration in the Surface Properties of Soils by Ion Exchange Resins (1962)
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 897-897 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A typical soil in water exchanged 4-8 mgm. of phosphorus per 100 gm. soil isotopically during 10 hr. by first order kinetics. When reacted with the 'mixed' resin system the soil exchanged a maximum of 7-3 mgm. phosphorus for Cl~ ions, of the same specific activity as the 'rapid' isotopically labile ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/194897a0
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  • 3
    Electronic Resource
    Electronic Resource
    The supply of nutrient ions by diffusion to plant roots in soil (1972)
    Springer
    Plant and soil 37 (1972), S. 609-616 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The concentration gradients of P32 labbelled phosphate were measured in a Coral Rag Clay soil, placed in contact with planes of onion and ryegrass roots for up to 12 days' growth. After contact with the roots the soil block, 3×2×1 cm was quick-frozen and sliced into sections 0.1 mm thick, on which the P32 was directly determined. The concentration: distance relationship showed only a small depletion profile, because the soil had a high power for buffering changes in phosphate concentration. There was also an unexpectedly large scatter (±5% of mean) in the initial distribution of P32 in the undepleted soil; detailed analyses was, therefore, not possible. However, a constant reduced concentration at the root: soil boundary was indicated in all cases, corresponding to uptake (by onion) increasing linearly with square root of time. Calculations gave an effective diffusion coefficient in the range 0.29–0.71×10−8 cm2/sec for a 10% depletion of the initial phosphate content at the root surface. These findings agree with previous inferences that supply of phosphate to plant roots in this soil could be accounted for by a simple diffusion process in which only ∼10% of the long-term isotopically exchangeable phosphate was depleted; there was no evidence that the phosphate diffusion characteristics of this soil were altered by the presence of plant roots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01348518
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  • 4
    Electronic Resource
    Electronic Resource
    The supply of nutrient ions by diffusion to plant roots in soil (1972)
    Springer
    Plant and soil 37 (1972), S. 627-639 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Phosphate uptake by onion roots over 18 days' growth, and the resultant phosphate loss from a sandy soil, were considerably larger than predictions using independently estimated diffusion coefficients and the soil's phosphate desorption isotherm. Soil pH was lowered by the plant roots; decreases of about 0.5 pH units could be measured close to the root. Separate experiments on pH effects on the phosphate desorption isotherm showed that the phosphate buffering power of this soil decreased and the concentration in solution increased as pH fell. These pH effects explain, in part, the 2.5-fold increase of the measured effective diffusion coefficient over 18 days' uptake and the larger depletion. When the soil solution contained mostly NO3 besides phosphate, soil pH near roots increased by about 0.4 pH units during 10 days' uptake; this rise would increase the phosphate buffer power and so decrease the effective diffusion coefficient, as observed experimentally in this weakly buffered sandy soil. Theoretical predictions of plant uptake and of the concentration: distance relationship in the soil should take account of pH gradients near roots and the consequent effects on the phosphate desorption characteristics of the soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01348520
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  • 5
    Electronic Resource
    Electronic Resource
    The supply of nutrient ions by diffusion to plant roots in soil (1969)
    Springer
    Plant and soil 30 (1969), S. 252-270 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A single-root technique is used to measure the rate of supply of potassium by diffusion to 1-cm portions of cylindrical roots of onion and leek plants growing in soils containing different levels of exchangeable potassium. The relation between uptake and characteristics of the plant and soil is interpreted on the basis of a diffusion supply model. Uptake is accounted for in terms of the geometry of the absorbing root surface, the physiologically controlled absorbing power of the root, and the diffusion through the soil. The different uptakes of potassium by roots of comparable absorbing power from different soils can be predicted with some success from calculations using the root dimensions and either diffusion coefficients of potassium in soil, derived from flux to a cation exchange resin paper, or the form of the potassium scorption isotherm relating the concentration of labile ions to those in the soil solution. It is calculated that diffusion through the soil has reduced potassium uptake by the roots to between 87 and 39 per cent of that expected for roots of the same absorbing power in a stirred culture solution at the same initial soil solution concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01349514
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  • 6
    Electronic Resource
    Electronic Resource
    The supply of nutrient ions by diffusion to plant roots in soil (1972)
    Springer
    Plant and soil 37 (1972), S. 617-626 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The concentration of exchangeable P (to P32 over 10 weeks) in a sandy soil was lowered by 50 per cent at the surface of a plane of onion roots. The rate of P uptake was uniform for 18 days, and the zone of depletion spread regularly. The effective diffusion coefficient increased by a factor of 2 to 3 over the period. The diffusion coefficient was approximately twice as great at a distance from the root plane as it was near the root plane, where the concentration was lower.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01348519
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  • 7
    Electronic Resource
    Electronic Resource
    A laboratory method for the evaluation of nutrient residues in soils (1965)
    Springer
    Plant and soil 23 (1965), S. 371-376 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A laboratory method used ion-exchange resins to extract phosphate ions from soils and to measure the rate at, and the extent to which, non-labile phosphate reserves in soils change into the isotopically exchangeable phosphate when the soils are allowed ‘to recover’. The method was tested on heavy and acid Indian soils, both unmanured and treated with NPK fertilisers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01347730
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  • 8
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    Unknown
    The supply of nutrient ions by diffusion to plant roots in soil (1969)
    Springer
    Details
    Publication Date: 1969-04-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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  • 9
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    A laboratory method for the evaluation of nutrient residues in soils (1965)
    Springer
    Details
    Publication Date: 1965-12-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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  • 10
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    Unknown
    The supply of nutrient ions by diffusion to plant roots in soil (1972)
    Springer
    Details
    Publication Date: 1972-03-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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