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  • 1
    Digitale Medien
    Digitale Medien
    The International Safeguards Problem (1977)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 2 (1977), S. 227-238 
    Details
    ISSN: 0362-1626
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Energietechnik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.eg.02.110177.001303
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The Biological Effects of Radiations (1951)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 13 (1951), S. 41-56 
    Details
    ISSN: 0066-4278
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Medizin , Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.ph.13.030151.000353
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Effects of Recombinant Amelogenin on Hydroxyapatite Formation In Vitro (1999)
    Springer
    Calcified tissue international 65 (1999), S. 226-231 
    Details
    ISSN: 1432-0827
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Physik
    Notizen: Abstract. To determine the role of amelogenin in the mineralization of dental enamel, the effects of the recombinant mouse amelogenin rM179 on in vitro hydroxyapatite formation have been studied. In a steady-state agarose gel assay for hydroxyapatite nucleation, rM179 lacked significant activity at concentrations up to 300 μg/ml. In an autotitration assay for inhibition of de novo hydroxyapatite formation, rM179 had no significant activity at concentrations up to 30 μg/ml. Using selected-area dark-field electron microscopy, it was shown that rM179, at concentrations up to 30 μg/ml, did not significantly affect the length of hydroxyapatite crystals formed in steady-state agarose gels. These findings suggest that amelogenins do not possess the specific crystal-modulating properties characteristic of certain acidic mineralized tissue proteins proteins.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002239900688
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Integrating forage, wildlife, water, and fish projections with timber projections at the regional level: A case study in southern United States (1990)
    Springer
    Environmental management 14 (1990), S. 489-500 
    Details
    ISSN: 1432-1009
    Schlagwort(e): Multiresource ; Timber inventory models ; Habitat evaluation ; Forage ; Wildlife ; Trout ; Regional planning ; Forest conversion ; Regional modeling
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract The impact of timber management and land-use change on forage production, turkey and deer abundance, red-cockaded woodpecker colonies, water yield, and trout abundance was projected as part of a policy study focusing on the southern United States. The multiresource modeling framework used in this study linked extant timber management and land-area policy models with newly developed models for forage, wildlife, fish, and water. Resource production was integrated through a commonly defined land base that could be geographically partitioned according to individual resource needs. Resources were responsive to changes in land use, particularly human-related, and timber management, particularly the harvest of older stands, and the conversion to planted pine.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02394137
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Changes in wetlands on nonfederal rural land of the conterminous United States from 1982 to 1987 (1994)
    Springer
    Environmental management 18 (1994), S. 693-705 
    Details
    ISSN: 1432-1009
    Schlagwort(e): Wetlands ; Wetland trends ; Wetland losses ; Land use impacts ; National
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract Recent wetland area trends were estimated from the National Resources Inventory (NRI) for nonfederal rural lands for the period 1982–1987. NRI-based estimates of wetland area for states comprising the conterminous United States were highly correlated with estimates made by the US Fish and Wildlife Service and with estimates of coastal salt marsh wetlands made by the National Oceanic and Atmospheric Administration. Net wetland area declined by 1.1% (≈363,200 ha) during the five-year study period. Conversion to open water, primarily caused by natural flooding in western inland basins, was responsible for altering extensive wetland areas (≈171,400 ha). Of the human-induced wetland conversions, urban and built-up land was responsible for 48% of the wetland loss, while agricultural development was indicated in 37% of the converted wetland area. A decrease in rural land, and increases in both population, and urban and built-up land were associated with wetland loss among states. Potential reasons for wetland loss were different in 20 coastal states than in 28 inland states. Proportionately, wetland loss due to development was three times greater in coastal states than inland states, while agriculturally induced wetland losses were similar in both groups. The proportionate declines of forested vs nonforested wetlands were not significantly different among states.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02394634
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Regional habitat appraisals of wildlife communities: a landscape-level evaluation of a resource planning model using avian distribution data (1992)
    Springer
    Landscape ecology 7 (1992), S. 137-147 
    Details
    ISSN: 1572-9761
    Schlagwort(e): avian community structure ; diversity ; habitat structure ; resource planning model ; spatial patterns ; wildlife habitat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A simple regional habitat model founded on the relation between vertical habitat complexity and species richness has been used to describe wildlife habitat in response to macroscale patterns in land use and land cover. While the model has a basis in ecological theory, it has not been subjected to rigorous testing. We evaluated the model's fundamental assumption on landscapes in the eastern forested region of the United States and found the model to be supported when we used a measure of avian community integrity during the breeding season. The model was improved by incorporating measures of horizontal heterogeneity, indicating that the vertical and horizontal structure of habitats should be considered in analyzing the response of wildlife to land resource policies that can affect broad land use patterns.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02418944
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    The behavior of white-faced capuchins (Cebus capucinus) at a dry-season waterhole (1978)
    Springer
    Primates 19 (1978), S. 275-286 
    Details
    ISSN: 0032-8332
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract During a study of white-faced capuchins (Cebus capucinus) in Santa Rosa National Park, northwest Costa Rica, the study troop drank daily from a single terrestrial waterhole for approximately three months during the dry season. The drinking order of troop members at the waterhole was not random: adult males tended to be in the first quartile of the drinking progression, adult females generally occurred with equal frequency throughout the progression, and juveniles drank most commonly in the third quartile. There were also differences in the usual drinking ranks among individuals of the same age-sex class. It is hypothesized that those adult males which are usually first in the progression are increasing their personal fitness by reducing the risk of predation on their offspring and on potential mates. The tendency of adult females to precede juveniles may similarly reflect protection of offspring. The daily visits to the waterhole by the study troop did not appear to greatly restrict the use of their range. It is suggested, however, that the availability of standing sources of water may be an important factor affecting the local distribution and density of capuchins in seasonally and chronically dry areas.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02382797
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Geographic Analysis of Species Richness and Community Attributes of Forest Birds from Survey Data in the Mid-Atlantic Integrated Assessment Region (2000)
    Springer
    Environmental monitoring and assessment 63 (2000), S. 81-94 
    Details
    ISSN: 1573-2959
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract Species richness of local communities is a state variable commonly used in community ecology and conservation biology. Investigation of spatial and temporal variations in richness and identification of factors associated with these variations form a basis for specifying management plans, evaluating these plans, and for testing hypotheses of theoretical interest. However, estimation of species richness is not trivial: species can be missed by investigators during sampling sessions. Sampling artifacts can lead to erroneous conclusions on spatial and temporal variation in species richness. Here we use data from the North American Breeding Bird Survey to estimate parameters describing the state of bird communities in the Mid-Atlantic Assessment (MAIA) region: species richness, extinction probability, turnover and relative species richness. We use a recently developed approach to estimation of species richness and related parameters that does not require the assumption that all the species are detected during sampling efforts. The information presented here is intended to visualize the state of bird communities in the MAIA region. We provide information on 1975 and 1990. We also quantified the changes between these years. We summarized and mapped the community attributes at a scale of management interest (watershed units).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006473804874
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Masonry fireplace emissions test method: Repeatability and sensitivity to fueling protocol (1993)
    Springer
    Environmental monitoring and assessment 25 (1993), S. 51-64 
    Details
    ISSN: 1573-2959
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract A test method for masonry fireplaces has been evaluated during testing on six masonry fireplace configurations. The method determines carbon monoxide and particulate matter emission rates (g/h) and factors (g/kg) and does not require weighing of the appliance to determine the timing of fuel loading. The intralaboratory repeatability of the test method has been determined from multiple tests on the six fireplaces. For the tested fireplaces, the ratio of the highest to lowest measured PM rate averaged 1.17 and in no case was greater than 1.32. The data suggest that some of the variation is due to differences in fuel properties. The influence of fueling protocol on emissions has also been studied. A modified fueling protocol, tested in large and small fireplaces, reduced CO and PM emission factors by roughly 40% and reduced CO and PM rates from 0 to 30%. For both of these fireplaces, emission rates were less sensitive to fueling protocol than emission factors.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00549792
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  • 10
    Digitale Medien
    Digitale Medien
    Feste Brennstoffe (1936)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 107 (1936), S. 73-77 
    Details
    ISSN: 1618-2650
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01388231
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