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  • Artikel  (90)
  • Springer  (72)
  • American Meteorological Society  (18)
  • 1985-1989  (44)
  • 1975-1979  (23)
  • 1910-1914  (7)
  • 1905-1909  (16)
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  • Artikel  (90)
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  • 1
    Digitale Medien
    Digitale Medien
    Action spectrum for the effect of day-extensions on flowering and apex elongation in green, light-grown wheat (Triticum aestivum L.) (1989)
    Springer
    Planta 179 (1989), S. 428-432 
    Details
    ISSN: 1432-2048
    Schlagwort(e): Action spectrum ; Light-grown plants ; Photoperiodism ; Phytochrome (type I) ; Triticum (photoperiodism)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Fluence-rate response curves for wavelengths from 640 nm to 730 nm were constructed for the day-extension promotion of flowering in green, light-grown, wheat (Triticum aestivum L., cv. Alexandria), a long-day plant. The resultant action spectrum had action maxima at 660 nm and 716 nm and resembles spectra for the high-irradiance reaction (HIR) seen in etiolated plants. Because, the HIR is thought to be controlled by type I pytochrome (that which is most abundant in etiolated tissue) our results indicate the involvement of type I phytochrome in the photomorphogenesis of a light-grown, green plant.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00397581
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Changes in flood-plain vegetation and land use along the Missouri River from 1826 to 1972 (1977)
    Springer
    Environmental management 1 (1977), S. 343-348 
    Details
    ISSN: 1432-1009
    Schlagwort(e): Flood-plain vegetation ; Land use ; Channelization ; Bank-stabilization ; Flood-plain forest succession
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract Changes in vegetation and land use since 1826 were evaluated along the 800 kilometer portion of the Missouri River flood-plain that extends across the State of Missouri using County Land Office Survey records for 1826 and aerial photos for 1937, 1958, and 1972. The combined results show a decline in flood-plain forest coverage from 76% in 1826 to 13% in 1972; cultivated land increased from 18% to 83% during the same time. Uncultivated-unforested areas increased from 6% in 1826 to 27% in 1937, then declined to 1% in 1972; these changes occurred coincident with extensive bank-stabilization and channelization activities initiated in 1912 by the U.S. Army Corps of Engineers. Riverbank stabilization activity since that time may account for the increased rate of decline in flood-plain forests from 0.25% per year between 1826 and 1937 to 1.6% per year between 1937 and 1972. The overall species composition of the 1826 flood-plain forests was found to be most similar to mature forest stands evaluated in 1972; similar frequencies in 1826 and 1972 occurred for hackberry (Celtis occidentalis; 80% in 1826, 83% in 1972), elm (Ulmus spp.; 80% and 83%), and sycamore (Platanus occidentalis; 57% and 50%). Pawpaw (Asimina triloba), found only in mature flood-plain forests in 1972, was recorded along 54% of the 1826 section lines. These combined data indicate (1) that pre-settlement flood-plain forests were extensive and included frequent, mature stands, (2) that in certain areas substantial portions of the flood-plain were in cultivation prior to extensive riverbank stabilization and channelization, and (3) that increased flood-plain forest clearing occurred coincident with increased bank-stabilization activities.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01865861
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Vergleich verschiedener planarer Passivierungstechniken für Halbleiterleistungsbauelemente (1989)
    Springer
    Electrical engineering 72 (1989), S. 89-94 
    Details
    ISSN: 1432-0487
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Beschreibung / Inhaltsverzeichnis: Contents Different passivation techniques for planar semiconductor power devices with blocking voltages of 1600 V are studied using two-dimensional numerical simulations.
    Notizen: Übersicht Für die Entwicklung einer optimalen Planar-passivierung von Halbleiterleistungsbauelementen mit Sperrspannungen von 1600 V wird ein Vergleich verschiedener Strukturen anhand zweidimensionaler numerischer Simulationen durchgeführt.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01573642
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Angle-resolved thermal desorption of atoms from solid surfaces: one-phonon mechanism (1987)
    Springer
    Theoretical chemistry accounts 72 (1987), S. 475-484 
    Details
    ISSN: 1432-2234
    Schlagwort(e): Desorption ; Phonons ; Thermal
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract A model for one-phonon thermal desorption is presented in which the structure of the substrate phonons, expressed as a projection on a surface atom of the phonon density of states, appears as a separate factor in the angle- and energy-resolved desorption rate. Desorption from both localized, and delocalized initioladatom states is considered. Under certain circumstances one can obtain the cosine-distribution of the equilibrium theory, but in general, the desorption flux from delocalized states deviates from the cosine law by being peaked away from the surface normal, whereas for localized initiol states, the flux is concentrated more in the normal direction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01192236
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Mapping of human autosomal phosphoglycerate kinase sequence to chromosome 19 (1986)
    Springer
    Somatic cell and molecular genetics 12 (1986), S. 395-401 
    Details
    ISSN: 1572-9931
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract In order to map human PGKsequences, DNA was prepared from 55 human-mouse somatic cell lines. The DNA was digested to completion with HindIII and Southern filters prepared. These filters were hybridized at high stringency conditions to a human PGKcDNA. Mouse and human X-linked and autosomal bands were distinguished and, in addition to known X-linked sequences, two autosomal PGKsequences were mapped: a 1-kb band to chromosome 19 and a 5-kb band to chromosome 6. The PGKcDNA probe was also hybridized to flow-sorted chromosomes confirming the presence of PGK sequences on the X chromosome and chromosomes 6 and 19.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01570734
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Complementation of genetic disease: A velocity sedimentation procedure for the enrichment of heterokaryons (1979)
    Springer
    Somatic cell and molecular genetics 5 (1979), S. 1013-1029 
    Details
    ISSN: 1572-9931
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Methodology is described to enrich for heterokaryons after mammalian cell fusion. A heterogeneous cell mixture can be separated on a Sta-Put apparatus into fractions of uniform size cells by sedimentation through a 1% bovine serum albumin-5% Ficoll gradient. Unfused RAG and LM/TK− cells, differing by 10% in diameter, have been sorted by size; following fusion, larger and faster sedimenting cells were shown to be hybrids. This methodology can be utilized in genetic complementation studies of human genetic diseases where selection procedures for proliferating hybrids do not exist. When fibroblasts from individuals with Tay-Sachs disease [deficient in hexosaminidase A (HEX A−)] and Sandhoff-Jatzkewitz disease (HEX A− and HEX B−) are fused, HEX A is generated, demonstrating complementation of two different mutations. After Sta-Put fractionation, the HEX A complementation product was associated with the faster sedimenting multinuclear cells and not with the mononuclear parental cells. This methodology will facilitate detection of genetic differences in fibroblasts from related inherited disorders.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01542657
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Polyethylene glycol-induced mammalian cell hybridization: Effect of polyethylene glycol molecular weight and concentration (1976)
    Springer
    Somatic cell and molecular genetics 2 (1976), S. 271-280 
    Details
    ISSN: 1572-9931
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The effects of polyethylene glycol (PEG) molecular weight and concentration on mammalian cell hybridization were studied. The peak hybridization-inducing activity with all grades of PEG from 400–6000 was found to occur in the concentration range of 50–55%. However, changes in concentration were seen to have different quantitative effects with different grades of PEG. For monolayer fusions, PEG 1000 at 50% seems to be the optimal combination of PEG molecular weight and concentration, in terms of both efficiency of hybridization and relative insensitivity to dilution effects.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01538965
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Bioautographic visualization of aminoacylase-1: Assignment of the structural geneACY-1 to chromosome 3 in man (1979)
    Springer
    Somatic cell and molecular genetics 5 (1979), S. 11-21 
    Details
    ISSN: 1572-9931
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract A bioautographic assay was developed for the visualization of aminoacylase-1 (N -acylamino acid aminohydrolase, ACY-1; EC 3.5.1.14) after zone electrophoresis. Bioautography and species differences in electrophoretic mobility of ACY-1 made it possible to investigate the chromosome assignment of the gene for human ACY-1 using human—mouse somatic cell hybrids. Human ACY-1 segregated concordantly with β-galactosidase-A (βGAL A;EC 3.2.1.23) but showed discordant segregation with 32 other markers representing 23 linkage groups. The β GALA gene has been previously assigned to chromosome 3. From this evidence and confirming chromosome analyses, ACY-1has been assigned to chromosome 3. A genetic polymorphism in the electrophoretic mobility of ACY was observed in mouse strains, demonstrating that this enzyme can be mapped in genetic crosses of Mus musculus.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01538782
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Genetics of the cell surface: Assignment of genes coding for external membrane proteins to human chromosomes 10 and 14 (1979)
    Springer
    Somatic cell and molecular genetics 5 (1979), S. 281-301 
    Details
    ISSN: 1572-9931
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Using somatic cell hybridization gene mapping methodology, genes coding for human cell-surface proteins have been assigned to specific chromosomes. Lactoperoxidase-catalyzed iodination was employed to label external membrane proteins in cell hybrids between mouse and human cultured cells. Mouse and human external membrane proteins were separated by sodium dodecylsulfate-polyacrylamide gel electrophoresis. After electrophoresis, external membrane proteins were identified by autoradiography. An external membrane protein of 130,000 molecular weight (EMP-130) segregated concordantly with glutamic oxaloacetic transaminases (GOTs, EC 2.6.1.1), an enzyme marker encoded on chromosome 10. External membrane proteins of 195,000 and 175,000 molecular weight (EMP-195 and EMP-175) segregated concordantly with nucleoside phosphorylase (NP, EC 2.4.2.1), an enzyme marker encoded on chromosome 14. Limited proteolysis of the 195,000 and 175,000 molecular weight proteins suggests that these two proteins are modified forms of each other and are encoded by the same locus. These findings demonstrate the mapping of human genes coding for external proteins EMP-130 and EMP-195 to chromosomes 10 and 14, respectively. Chromosome analyses of cell hybrids supported these assignments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01538843
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    GM1-gangliosidosis: Chromosome 3 assignment of theβ-galactosidase-A gene (β GAL A ) (1979)
    Springer
    Somatic cell and molecular genetics 5 (1979), S. 147-158 
    Details
    ISSN: 1572-9931
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The structural gene (βGALA) coding for lysosomal β-galactosidase- A (EC 3.2.1.23) has been assigned to human chromosome 3 using man-mouse somatic cell hybrids. Human β-galactosidase-A was identified in cell hybrids with a species-specific antiserum to human liver β-galactosidase-A. The antiserum precipitates β-galactosidase-A from human tissues, cultured cells, and cell hybrids, and recognizes cross-reacting material from a patient with GM1 gangliosidosis. We have analyzed 90 primary man-mouse hybrids derived from 12 separate fusion experiments utilizing cells from 9 individuals. Enzyme segregation analysis excluded all chromosomes for βGALA assignment except chromosome 3. Concordant segregation of chromosomes and enzymes in 16 cell hybrids demonstrated assignment of βGALA to chromosome 3; all other chromosomes were excluded. The evidence suggests that GM1 gangliosidosis is a consequence of mutation at this βGALA locus on chromosome 3.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01539157
    Standort Signatur Erwartet Verfügbarkeit
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