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  • 1
    Electronic Resource
    Electronic Resource
    The Kinetics of the Reactions of Substituted 1,10-Phenanthroline, 2,2'-Dipyridine and 2,2',2″-Tripyridine Complexes of Iron(III) with Iron(II) Ions1 (1961)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 83 (1961), S. 1830-1834 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01469a015
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  • 2
    Electronic Resource
    Electronic Resource
    Nematic–lamellar tricritical behavior and structure of the lamellar phase in the ammonium pentadecafluorooctanoate (APFO)/water system (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 9096-9105 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: 2H NMR spectroscopy has been used to map a high-resolution (±0.04 K) phase diagram for the ammonium pentadecafluorooctanoate(APFO)/heavy water system. It is qualitatively similar to that for the CsPFO/heavy water system. In particular, it exhibits a discotic micellar nematic phase N+D intermediate to an isotropic micellar solution phase I and a lamellar phase for weight fractions of APFO between 0.395 (φ=0.278) and 0.589 (φ=0.455) and temperatures between 292.10 and 338.10 K. The N+D to lamellar transition crosses over from second to first order behavior at a tricritical point similar to the superfluid transition in 3He/4He mixtures. X-ray scattering experiments shows there to be no dramatic change in the structure of the micelle at the I to N+D and the N+D to lamellar transitions. Nematic order parameters (orientational order parameters of the discoidal micelles) have been calculated from electrical conductivity measurements. Their variation with temperature in the nematic phase and across the nematic to lamellar transition are qualitatively consistent with the behavior expected for thermotropic calamitic liquid crystals undergoing an isotropic to nematic to smectic-A sequence of transitions.It is, therefore, concluded that the transition from the N+D to the lamellar phase solely involves the propagation of long range positional ordering of the discoidal micelles into planes along the nematic director, that is, the lamellar phase is a discotic lamellar phase LD. This result reinforces previous claims about the structure of the lamellar phase of the CsPFO system as opposed to the alternative scenario of a classical lamellar phase in which the bilayers are perforated by microscopic defects. This conclusion is supported by measurements of 2H quadrupole splittings of heavy water. Similar measurements for deuterated ammonium ions show a preference for counterion binding to sites of lowest surface curvature. The fraction of counterions bound to the surface of the micelle is shown to increase as the temperature is lowered due to a growth in diameter and associated changes in surface curvature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459200
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  • 3
    Electronic Resource
    Electronic Resource
    CARDIORESPIRATORY DYNAMICS IN THE OX AND GIRAFFE, WITH COMPARATIVE OBSERVATIONS ON MAN AND OTHER MAMMALS (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 127 (1965), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1965.tb49416.x
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  • 4
    Electronic Resource
    Electronic Resource
    Nature and Composition of Dental Plaque (1961)
    [s.l.] : Nature Publishing Group
    Nature 189 (1961), S. 664-665 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have collected plaque from dentures after thorough brushing in a stream of running water. This material shows characteristics similar to those of the deposits described by Manly1 and Vallotton8. Samples examined microscopically and by culture in various media were virtually sterile. Specimens ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/189664a0
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  • 5
    Electronic Resource
    Electronic Resource
    Radiocesium in Fish from the Savannah River and Steel Creek: Potential Food Chain Exposure to the Public (2001)
    Boston, USA and Oxford, UK : Blackwell Publishers Inc.
    Risk analysis 21 (2001), S. 0 
    Details
    ISSN: 1539-6924
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: This study examined radiocesium (137Cs) levels in fish from the vicinity of the Department of Energy's Savannah River Site (SRS), a former nuclear weapons production facility in South Carolina. Fish from the Savannah River were sampled above (upstream), along, and below (downstream) the SRS, and from Steel Creek, a tributary that runs through the SRS. There was some off-site contamination of 137Cs in the Savannah River watershed due to low-level releases from past nuclear production on the SRS. The null hypotheses tested were that there would be no differences in 137Cs levels as a function of location along the river, and between species collected from the river and from Steel Creek on the SRS. For six of eight species of fish collected from the Savannah River, there were no differences in 137Cs levels in muscle from fish collected above, along, or below the SRS; exceptions were bowfin and shellcracker. Fish collected from Steel Creek had significantly higher levels (by about an order of magnitude) of 137Cs in muscle tissue than fish collected in the Savannah River. However, no fish from either Steel Creek or the Savannah River had 137Cs levels above the European Economic Community limit for fresh meat of 0.6 Bq/g. Lifetime cancer risk was calculated using the cancer slope factor of 3.2 × 10−11/pCi, and various fish consumption scenarios reflecting actual data from Savannah River fishermen. Using mean 137Cs concentrations and median fish consumption for 70 years for Black males—the group with the highest consumption—the excess lifetime risk associated with the eight species of fish in the Savannah River ranged from 9.0 × 10−7 to 1.0 × 10−5. The same calculation for fish from Steel Creek gave risk estimates from 1.4 to 8.0 × 10−5. The 95% level for consumption by Blacks, however, was about 70 kg/year. Black fishermen consuming that amount of bass from Steel Creek would sustain a lifetime risk of 3.1 × 10−4, whereas the same consumption of Savannah River bass would yield a risk estimate of 1.5 × 10−5.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/0272-4332.213131
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  • 6
    Electronic Resource
    Electronic Resource
    PRELIMINARY EVALUATION OF HETACILLIN IN THE TREATMENT OF ACUTE BACTERIAL MENINGITIS (1967)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 145 (1967), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1967.tb50251.x
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  • 7
    Electronic Resource
    Electronic Resource
    Inhomogeneities in the water properties of fogs and clouds (1977)
    [s.l.] : Nature Publishing Group
    Nature 267 (1977), S. 32-33 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Values of droplet concentrations N, water content C, mean radius r, and dispersion S measured within hill fog (mean spacing of consecutive spectra about 3 m) AT 129 140 112 136 115 105 99 106 111 99 97 76 112 95 106 154 144 118 142 168 C ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/267032b0
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  • 8
    Electronic Resource
    Electronic Resource
    Effect on global warming of wind-dependent aerosol generation at the ocean surface (1990)
    [s.l.] : Nature Publishing Group
    Nature 347 (1990), S. 372-373 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It is well established3'4 that aerosols are generated at the ocean surface by wind-related processes such as bubble-film bursting, whitecapping and spin-drift. The generation of such aerosol particles increases rapidly with increasing wind speed U (refs 5-7). The primary constitutent of this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/347372a0
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  • 9
    Electronic Resource
    Electronic Resource
    A coronal loop model for the production of X-ray and radio flares in the RS CVn binary HR 1099 (1994)
    Springer
    Astrophysics and space science 211 (1994), S. 115-126 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The RS CVn binary stellar system HR 1099 is a source of both X-ray and radio flares. We present here a model of the system in which the two types of flare are produced by the same population of mildly-relativistic (γ ≲ 10) electrons, injected into a coronal loop. After reviewing possible radiation mechanisms we conclude that, given the probable conditions in the flaring region, the radio emission is gyrosynchrotron radiation and the X-ray emission is thermal bremsstrahlung. The thermal X-ray source must lie in the stellar chromosphere, but the apparent absence of plasma absorption at radio frequencies indicates that the radio source is located high in the coronal loop. Using the relationships given by Dulk and Marsh (1982) for the radio emission from a power-law electron energy spectrum,N(γ)α (γ - 1)−δ, we conclude that 3 ≲δ ≲ 7, with ≳ 30% of the electron population trapped in the radio source. Some implications of these results for one particular version of the model are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00658047
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  • 10
    Electronic Resource
    Electronic Resource
    Sources of error associated with sample collection and preparation of nucleated blood cells for flow cytometric analysis (1994)
    Springer
    Cell biology and toxicology 10 (1994), S. 145-153 
    Details
    ISSN: 1573-6822
    Keywords: DNA ; flow cytometry ; genotoxicology ; largemouth bass ; red blood cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Analysis of cellular DNA content by flow cytometry has been used to detect genetic changes associated with exposure to environmental contaminants. In lower vertebrates, nucleated red blood cells can be collected for analysis without harm to the animal. Because erythrocytes sampled from an individual should have identical amounts of DNA, the coefficient of variation (CV) around the G0/G1 peak should be small. Increases in CV can indicate genetic aberrations, but may also be caused by sample handling and preparation or problems with instrumentation. To increase confidence in associating increases in CV with external causes, artifactual changes in CV due to sample treatment and instrument parameters should be identified and minimized. We assessed the effects of various sampling and handling protocols on the CV of nucleated blood cells collected from largemouth bass (Micropterus salmoides). We also compared the distribution of cells among the G0/G1, S, and G2/M phases of the cell cycle to see whether these were affected by sampling or treatment protocols. Groups of 7 fish were bled on 7 consecutive days, and blood from each fish was analyzed by flow cytometry when freshly collected, and after freezing for 1 hour or 10 days. The same fish were bled again over a consecutive 7-day period, and the experiment was repeated. CV and cell cycle distribution were not affected by our freezing protocol. Repeat sampling from the same individual did not affect CV, but altered the distribution of cells in the cell cycle, suggesting increased hemopoiesis in response to blood sampling. Day-to-day variation in the CV occurred in both fresh and frozen samples, probably as the result of small variations in instrument adjustments. These results demonstrate the suitability of this freezing protocol for these blood samples, and illustrate the importance of assessing sources of variation when using flow cytometry to screen wild populations in genotoxicological studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00757557
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