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  • 1
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    Annotated record of the detailed examination of Mn deposits from ARA Islas Orcadas Cruise 12 core stations (1979)
    PANGAEA
    In:  Supplement to: Kaharoeddin, F A; Eggers, M; Graves, R S; Goldstein, E H; Hattner, J; Jones, S C; Ciesielski, Paul F (1979): ARA Islas Orcadas Cruise 1277 sediment descriptions. Sedimentology Research Laboratory Contributions, Antarctic Research Facility, Department of Geology, Florida State University, Tallahassee, Contribution No 47, 144 pp, https://www.ngdc.noaa.gov/mgg/curator/data/islas_orcadas/io1277/io1277_descriptions.pdf
    Details
    Publication Date: 2023-08-28
    Description: The purpose of this volume, the ninth in a series of similar publications (Goodell, 1964, 1965, 1968; Frakes 1971, 1973 ; Cassidy et al., 1977), is to continue a presentation to the research community of sediment core descriptions and attendant data of cored and otherwise obtained sediments retrieved in waters of the Southern Ocean aboard the research vessel, ARA Islas Orcadas (formerly, USNS Eltanin), as a part of the circumpolar survey begun by Eltanin in 1962 (see issue of Antarctic Journal of the United States, Vol. 8, No. 3, 1973). The data presented herein are concerned with the results of coring activities aboard cruise 1277 of Islas Orcadas, the third marine geology coring cruise of this vessel under the terms of the present United States-Argentine agreement. The core descriptions are organised as follows: 1) a brief summary of the coring objectives of the cruise, together with a discussion of core recovery; 2) a table and map of station location data for materials retrieved; 3) a table of tentative age-dates for each piston core; 4) an explanation of the laboratory procedures and descriptive criteria used in the description of the sediments, and 5) lithologic descriptions of the piston and trigger cores, and the piston and trigger core bag samples.
    Keywords: Color description; Deposit type; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Description; Elevation of event; Event label; GC; Gravity corer; Identification; IO1277; IO1277.001-PC; IO1277.002-PC; IO1277.002-TC; IO1277.003-PC; IO1277.006-PC; IO1277.006-TC; IO1277.007-TC; IO1277.013-PC; IO1277.014-PC; IO1277.017-PC; IO1277.020-PC; IO1277.020-TC; IO1277.021-PC; IO1277.022-PC; IO1277.025-PC; IO1277.026-PC; IO1277.027-PC; IO1277.029-PC; IO1277.029-TC; IO1277.030-PC; IO1277.031-PC; IO1277.032-PC; IO1277.033-PC; IO1277.033-TC; IO1277.034-PC; IO1277.036-PC; IO1277.036-TC; IO1277.037-PC; IO1277.037-TC; IO1277.042-PC; IO1277.042-TC; Islas Orcadas; Latitude of event; Longitude of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; PC; Piston corer; Position; Quantity of deposit; Sediment type; Size; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 1098 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Annotated record of the detailed examination of Mn deposits from ARA Islas Orcadas Cruise 16 core stations (1982)
    PANGAEA
    In:  Supplement to: Kaharoeddin, F A; Graves, R S; Bergen, James A; Eggers, Margaret R; Harwood, David M; Humphreys, CL; Goldstein, E H; Jones, S C; Watkins, David K (1982): ARA Islas Orcadas Cruise 1678 Sediment descriptions. Antartic Research Facility, Department of Geology, Florida Sate University, Tallahassee, Florida, Contribution No. 50, 178 pp, https://www.ngdc.noaa.gov/mgg/curator/data/islas_orcadas/io1678/io1678_descriptions.pdf
    Details
    Publication Date: 2024-01-20
    Description: The purpose of this volume, the seventh in a series of similar publications (Goodell, 1964, 1965, 1968; Frakes 1971, 1973 ; Cassidy et al., 1977), is to continue a presentation to the research community of sediment core descriptions and attendant data of cored and otherwise obtained sediments retrieved in waters of the Southern Ocean aboard the research vessel, ARA Islas Orcadas (formerly, USNS Eltanin), as a part of the circumpolar survey begun by Eltanin in 1962 (see issue of Antarctic Journal of the United States, Vol. 8, No. 3, 1973). The data presented herein are concerned with the results of coring activities aboard cruise 1678 of Islas Orcadas, the fith and final marine geology coring cruise of this vessel under the terms of the present United States-Argentine agreement. The core descriptions are organised as follows: 1) a brief summary of the coring objectives of the cruise, together with a discussion of core recovery; 2) a table and map of station location data for materials retrieved; 3) a table of tentative age-dates for each piston core; 4) an explanation of the laboratory procedures and descriptive criteria used in the description of the sediments, and 5) lithologic descriptions of the piston and trigger cores, and the piston and trigger core bag samples.
    Keywords: Comment; Deposit type; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Description; Elevation of event; Event label; GC; Gravity corer; Identification; IO1678; IO1678.018-PC; IO1678.019-PC; IO1678.023-PC; IO1678.024-PC; IO1678.026-PC; IO1678.027-PC; IO1678.028-PC; IO1678.036-PC; IO1678.041-PC; IO1678.050-PC; IO1678.055-PC; IO1678.056-PC; IO1678.064-PC; IO1678.066-PC; IO1678.066-TC; IO1678.070-PC; IO1678.070-TC; IO1678.073-PC; IO1678.076-PC; IO1678.083-PC; IO1678.090-TC; IO1678.096-PC; IO1678.108-PC; IO1678.111-PC; IO1678.111-TC; IO1678.116-PC; IO1678.117-PC; Islas Orcadas; Latitude of event; Longitude of event; Method/Device of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; PC; Piston corer; Position; Quantity of deposit; Sediment type; Size; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 625 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
    Electronic Resource
    Electronic Resource
    Refractive indices of sapphire under elastic, uniaxial strain compression along the a axis (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 4990-4996 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Sapphire crystals were shocked to 190 kbar along the a axis to characterize their use as optical windows, for velocity interferometry measurements, up to their Hugoniot elastic limit. When partially polarized light is incident on the samples, birefringence in the material is manifested as a beat frequency in the probe light that is returned from the specimens. Proper procedures for interpreting the velocity interferometry data for various polarization conditions were developed. The refractive indices at 514.5 nm wavelength decreased linearly with the density. The data were analyzed to yield three photoelastic coefficients: p12, p31, and p41. Calibration is developed for any polarization state of the probe light. Particle velocity wave forms are consistent with elastic behavior up to 170 kbar shock stress, and evidence of deviation from elastic behavior is present at 190 kbar impact stress. High precision shock velocity measurements are reported to 170 kbar stress along the a axis. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1409576
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  • 4
    Electronic Resource
    Electronic Resource
    Refractive index and elastic properties of z-cut quartz shocked to 60 kbar (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 5671-5679 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Shock wave experiments were performed to characterize z-cut, α-quartz as an optical window for velocity interferometry measurements. Refractive index changes and shock velocities were determined to 60 kbar peak stress. Results indicate that the window correction to velocity measurements is a constant fraction of the actual particle velocity, Δu/u=0.081 07. Shock velocity measurements provide the Hugoniot curve to 60 kbar, and yield the fourth-order elastic constant, C3333=174 810 kbar. By combining the velocity correction factor and the shock velocity measurements, the refractive index is determined to be a linear function of density. This finding is used to show that the velocity correction appropriate for a step jump may be applied to monotonically time-dependent wave forms with negligible error. The present work has demonstrated the use of z-cut quartz as an optical window to 60 kbar. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1319329
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  • 5
    Electronic Resource
    Electronic Resource
    Characterization of a two-dimensional, thermoluminescent, dose-mapping system: Uniformity, reproducibility, and calibrations (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3243-3251 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Initial testing of a new, commercially available, thermoluminescent dosimetry system is reported. The radiation detectors consist of two-dimensional arrays of 104 CaF2:Mn dosimeters, deposited on flexible polyimide sheets. The spatial resolution is 3 mm, and the combined thickness of the dosimeters and the substrate is 185 μm. Exposed sheets are processed by laser heating. This system is compatible with intense, pulsed Bremsstrahlung fields and electronics hardness testing. A two-step calibration procedure is described. In spatial uniformity tests at 66 Gy the detectors exhibited random fluctuations of 1%–3% superposed on broad spatial drifts of ∼±5%. Reproducibility for strips of 288 elements, cut from sheets and given absorbed doses of 100 Gy, was ∼2%. For absorbed doses in the 10 Gy–1.5 kGy range, response vs exposure curves show reasonable features of linearity, supralinearity, and saturation for CaF2:Mn phosphor. Small systematic effects (〈7%) can be observed for sheets and strips stacked during exposure; these effects are explained by radiation transport calculations and impact the dosimetric technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144558
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  • 6
    Electronic Resource
    Electronic Resource
    Transient solution of the diffusion equation for a composite system heated with a laser beam (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 5627-5629 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The general solution of the thermal diffusion equation for the case of a semi-infinite two-layer system that is heated with a localized cw laser beam of circularly uniform intensity profile is extended to times after the pulse is switched off. An application of that solution in the field of solid-state dosimetry is illustrated by simulating the experimental thermoluminescence response curves obtained from LiF:(Mg,Ti)-phosphor-coated borasilicate glass, for the special case of heating with a CO2-laser beam that has a uniform and square intensity profile: In effect, we solve the diffusion equation experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343670
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  • 7
    Electronic Resource
    Electronic Resource
    Interference competition in desert subterranean termites (1991)
    Springer
    Entomologia experimentalis et applicata 61 (1991), S. 83-90 
    Details
    ISSN: 1570-7458
    Keywords: Foraging behavior ; Gnathamitermes perplexus ; Heterotermes aureaus ; interspecific aggression ; Isoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We examined interspecific aggression between two subterranean termite species, Heterotermes aureus (Snyder) (Rhinotermitidae) and Gnathamitermes perplexus (Banks) (Termitidae). In laboratory tests with worker termites, neither species was the inherently superior fighter, but rather the outcome of interspecific encounters depended on the number of conspecifics. We then investigated patterns of resource use by these species during a 13-month period in the Sonoran Desert. Baits consisted of toilet-paper rolls, which have been shown to be a mutually acceptable food source. Analyses of foraging activity demonstrated that the two species did not forage independently of each other. Not only were the two species negatively associated spatially, but extended periods of temporal segregation were observed. G. perplexus took significantly longer to return to sites that it had simultaneously occupied with H. aureus than to sites that G. perplexus had occupied alone. The pattern of co-occurrence of these two species is consistent with the hypothesis that interspecific interference competition affects their spatial and temporal distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00367171
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  • 8
    Electronic Resource
    Electronic Resource
    Abnormal regulation of cell membrane fluidity in diabetic nephropathy (1998)
    Springer
    Diabetologia 41 (1998), S. 337-342 
    Details
    ISSN: 1432-0428
    Keywords: Keywords Diabetic nephropathy ; fluidity ; anisotropy ; N-ethylmaleimide ; erythrocyte ; insulin-dependent diabetes mellitus.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An abnormality of the physical properties of the cell membrane may underlie the defect that unites the clinical and biochemical abnormalities found in subjects with diabetic nephropathy. The cell membrane is linked both structurally and functionally with the cytoskeleton. The fluorescence anisotropy, a measure of membrane fluidity, was studied at baseline and after modulation of cytoskeletal proteins by thiol group alkylation with N-ethylmaleimide (NEM). 1,6-diphenyl-1,3,5-hexatriene (DPH) was used to assess anisotropy in the deep hydrophobic regions of the lipid bilayer and trimethylammonium-diphenylhexatriene (TMA-DPH) was used to assess the superficial, relatively hydrophilic regions. We compared 17 subjects with insulin-dependent diabetes mellitus (IDDM) and nephropathy with 17 control subjects with IDDM and 24 non-diabetic control subjects. Median TMA-DPH anisotropy (0.271 (0.239–0.332) vs 0.269 (0.258–0.281) vs 0.275 (0.246–0.287)) and DPH anisotropy (0.221 (0.193–0.261) vs 0.227 (0.197–0.253) vs 0.226 (0.193–0.245)) were similar in erythrocytes from the three groups. However after alkylation of protein thiol groups with NEM clear differences emerged. In the control subjects with and without IDDM there was a significant fall in TMA-DPH anisotropy compared to the subjects with diabetic nephropathy in whom the addition of NEM had no effect (ΔTMA-DPH anisotropy –0.005 (–0.020– + 0.006) vs –0.005 (–0.011– + 0.016) vs + 0.002 (–0.010 – + 0.008) p 〈 0.001). This finding was confirmed when the deep regions of the lipid bilayer were assessed using DPH (ΔDPH anisotropy –0.017 (–0.029 –– 0.007.) vs –0.015 (–0.029 – + 0.001) vs + 0.003 (–0.021 – + 0.018) p 〈 0.001). We conclude that cytoskeletal modulation of the physical properties of the cell membrane lipids by proteins is abnormal in subjects with diabetic nephropathy. Such an abnormality could explain some of the clinical and metabolic abnormalities found in this condition. [Diabetologia (1998) 41: 337–342]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001250050912
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  • 9
    Electronic Resource
    Electronic Resource
    Thiol group modulation of sodium-lithium countertransport kinetics in diabetic nephropathy (1997)
    Springer
    Diabetologia 40 (1997), S. 1079-1084 
    Details
    ISSN: 1432-0428
    Keywords: Keywords Diabetic nephropathy ; sodium-lithium countertransport ; thiol group ; N-ethylmaleimide ; erythrocyte ; insulin-dependent diabetes mellitus.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Abnormal erythrocyte sodium-lithium countertransport (Na-Li CT) activity, traditionally measured at a single sodium concentration of 140 mmol · l–1 (V140), may represent an inherited risk marker for diabetic nephropathy. The membrane defect underlying this association is poorly understood, though modulation by key protein thiol groups appears to be important in essential hypertension. To improve understanding of this abnormality, Na-Li CT kinetics in untreated erythrocytes and after thiol group alkylation with N-ethylmaleimide were investigated in 18 subjects with diabetic nephropathy, 20 normoalbuminuric insulin-dependent diabetic (IDDM) subjects and 18 non-diabetic individuals. Using the traditional assay, V140 was similar in subjects with diabetic nephropathy compared to IDDM control subjects vs 0.311 (0.152–0.475) (0.247 (0.111–0.498) mmol Li · h–1· l erythrocytes–1). Kinetic parameters were abnormal in subjects with diabetic nephropathy compared with diabetic and non-diabetic control subjects, with both Vmax (maximal Na-Li CT activity) (0.454 (0.257–0.963) vs 0.338 (0.183–0.972) vs 0.332 (0.213–0.603) mmol Li · h–1· l erythrocytes–1, p 〈 0.05), and Vmax/Km(So) ratio, reflecting ion association (6.03 (2.3–9.6) vs 4.73 (2.0–10.4) vs 4.48 (1.5–7.1), p 〈 0.01), significantly higher. N-ethylmaleimide decreased Km(So) and Vmax abolishing differences in Vmax/Km(So) ratio between groups (2.45 (1.18–4.21) vs 2.23 (0.96–4.3) vs 2.44 (1.4–3.7), but enhancing the differences in Vmax (0.186 (0.090–0.315) vs 0.120 (0.051–0.256) vs 0.128 (0.080–0.206) mmol Li · h–1· l erythrocytes–1, p 〈 0.0001). Of subjects with diabetic nephropathy, 78 % were outside the 75th percentile of the non-diabetic control subjects when Vmax and Vmax/Km(So) ratio were combined, compared to 20 % of the normoalbuminuric control subjects. We conclude that the traditional assay, V140, is poor at detecting individuals with diabetic nephropathy. Study of the kinetic parameters of the transporter, including thiol group modulation, suggests that increased ion association, Vmax/Km(So) ratio may represent the inherited defect and improves identification of subjects with diabetic nephropathy. [Diabetologia (1997) 40: 1079–1084]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001250050790
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  • 10
    Electronic Resource
    Electronic Resource
    Intermittent high glucose enhances cell growth and collagen synthesis in cultured human tubulointerstitial cells (1999)
    Springer
    Diabetologia 42 (1999), S. 1113-1119 
    Details
    ISSN: 1432-0428
    Keywords: Keywords Diabetic nephropathy ; tubulointerstitium ; cell growth ; extracellular matrix ; cytokine.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Aims/hypothesis. We investigated the effects of constant and intermittently increased glucose concentrations on human proximal tubule cells and cortical fibroblasts in primary culture. Methods. Cells were grown to confluence and then exposed for 4 days to 6.1 mmol/l d-glucose (normal), 25 mmol/l d-glucose (high), or 6.1 mmol/l alternating with 25 mmol/l d-glucose on a daily basis. Results. In proximal tubular cells, exposure to high glucose caused an 11 % increase in thymidine uptake (p 〈 0.05), a 230 % increase in secretion of transforming growth factor beta 1 (TGF-β1; p 〈 0.05) and a 393 % increase in platelet derived growth factor. Intermittent exposure to high glucose caused thymidine uptake to further increase by 42 % (p 〈 0.01) and TGF-β1 secretion by 352 % (p 〈 0.01) but no additional increase in platelet-derived growth factor secretion was observed. Cellular protein content increased by 27 % (p 〈 0.05) and collagen synthesis by 29 % (p 〈 0.05), changes that were not observed in cells constantly exposed to high glucose. In cortical fibroblasts constant exposure to high glucose caused a 35 % increase in thymidine uptake (p 〈 0.01). Intermittently high glucose increased thymidine incorporation a further 58 % (p 〈 0.001), collagen synthesis by 65 % (p 〈 0.01) and insulin-like growth factor binding protein 3 secretion by 216 % (p 〈 0.01). Conclusion/interpretation. In cultured human tubulointerstitial cells, increased glucose concentrations change cell growth, collagen synthesis and cytokine secretion. These effects are enhanced following intermittent exposure to high glucose, indicating that short lived excursions in glycaemic control have important pathological effects on the human tubulointerstitium. [Diabetologia (1999) 42: 1113–1119]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001250051279
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