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  • 1
    facet.materialart.
    Unknown
    Behavioural lateralization and shoaling cohesion of fish larvae altered under ocean acidification (2016)
    PANGAEA
    In:  Supplement to: Lopes, A F; Morais, P; Pimentel, Marta; Rosa, Rui; Munday, Philip L; Gonçalves, Emanuel J; Faria, Ana M (2016): Behavioural lateralization and shoaling cohesion of fish larvae altered under ocean acidification. Marine Biology, 163(12), https://doi.org/10.1007/s00227-016-3026-4
    Details
    Publication Date: 2024-03-15
    Description: Recent studies have shown that the behaviour and development of coral reef fish larvae is hampered by projected future CO2 levels. However, it is uncertain to what extent this effect also occurs in temperate species. The effects that elevated pCO2 (2000 µatm) levels, which are expected to occur in coastal upwelling regions in the future, have on shoaling behaviour and lateralization (turning preference) of fish, were tested in temperate sand smelt Atherina presbyter larvae. The hypothesis that behavioural changes are caused by interference of high CO2 with GABA-A receptor function was tested by treating larvae with a receptor antagonist (gabazine). Routine swimming speed did not differ between control and high pCO2, but exposure to high pCO2 for 7 days affected group cohesion, which presented a more random distribution when compared to control fish. However, this random distribution was reversed after 21 days of exposure to high CO2 conditions. Lateralization at the individual level decreased in fish exposed to high pCO2 for 7 and 21 days, but gabazine reversed this decline. This adds to the growing body of evidence that the effects of a more acidified environment on fish larvae behaviour are likely due to altered function of GABA-A receptors. Overall, our results suggest that future pCO2 levels likely to occur in temperate coastal ecosystems could have an adverse effect on temperate larval fish behaviour.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Arrabida_OA; Atherina presbyter; Behaviour; Bicarbonate ion; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chordata; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Distance; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Index; Laboratory experiment; Lateralization; Nekton; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Potentiometric; Potentiometric titration; Registration number of species; Salinity; Salinity, standard deviation; Single species; Species; Speed, swimming; Temperate; Temperature, water; Temperature, water, standard deviation; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 14814 data points
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Winter river discharge may affect summer estuarine jellyfish blooms (2018)
    In:  EPIC3Marine Ecology Progress Series, 591, pp. 253-265, ISSN: 0171-8630
    Details
    Publication Date: 2018-05-29
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 3
    Electronic Resource
    Electronic Resource
    Sepsis-related organ failure assessment (SOFA) as a descriptor of multiple organ failure: A preliminary study (1996)
    Springer
    Intensive care medicine 22 (1996), S. S44 
    Details
    ISSN: 1432-1238
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusions In this population of severely ill patients, SOFA score decrease over time, both in survivors and in non-survivors; it's discriminative power increases, but remains lower than general severity scores. At admission, best discrimination was achieved by cardiovascular failure, but after 5 days in the ICU, respiratory failure was superior. The impact on prognosis of organ failure was analysed, with cardiovascular failure at admission, and respiratory, renal, and hematological on 5th day having the greatest impact on prognosis. The relationships among the six organic systems analysed can be described in terms of a two dimensional structure; this point needs further research, since it can reveal new insights in the sequence and patterns of evolution of multiple organ disfunction/failure syndrome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01921218
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  • 4
    Electronic Resource
    Electronic Resource
    Outcome prediction in intensive care: results of a prospective, multicentre, Portuguese study (1997)
    Springer
    Intensive care medicine 23 (1997), S. 177-186 
    Details
    ISSN: 1432-1238
    Keywords: Key words Severity of illness ; index ; Intensive care ; Critical care ; Mortality prediction ; Simplified Acute Physiology Score (SAPS II) ; Acute Physiology and Chronic Health Evaluation (APACHE II)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To compare the performance of the New Simplified Acute Physiology Score (SAPS II) and Acute Physiology and Chronic Health Evaluation (APACHE) II in an independent database, using formal statistical assessment. Design: Analysis of the database of a multicentre, prospective study. Setting: 19 intensive care units (ICUs) in Portugal. Patients: Data for 1094 patients consecutively admitted to the ICUs were collected over a period of 4 months. Following the original SAPS II and APACHE II criteria, the analysis excluded patients younger than 18 years of age, readmissions, acute myocardial infarction, burns, patients in the post-operative period after coronary artery bypass surgery, and patients with a length of stay in the ICU of less than 24 h. The group analysed comprised 982 patients. Interventions: Collection of the first 24 h admission data necessary for the calculation of SAPS II, APACHE II, Therapeutic Intervention Scoring System (TISS), Simplified TISS, organ system failure and basic demographic statistics. Vital status at discharge from the hospital was registered. Measurements and results: In this cohort, discrimination was better for SAPS II than for APACHE II (SAPS II: area under the receiver operating characteristic curve 0.817, standard error 0.015; APACHE II: 0.787, 0.015; p 〈 0.001); however, both models presented a poor calibration, with significant differences between observed and predicted mortality (Hosmer-Lemeshow goodness-of-fit tests H and C, p 〈 0.001). In a stratified analysis, this study was unable to demonstrate any definite pattern of association between the poor performance of the models and specific subgroups of patients except for the most severely ill patients, where both models overestimated mortality. Conclusions: SAPS II performed better than APACHE II in this independent database, but the results do not allow its use, at least without being customised, to analyse quality of care or performance among ICUs in the target population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340050313
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Validation of the simplified therapeutic intervention scoring system on an independent database (1997)
    Springer
    Intensive care medicine 23 (1997), S. 640-644 
    Details
    ISSN: 1432-1238
    Keywords: Key words Therapeutic Intervention Scoring System ; Simplified Therapeutic Intervention Scoring System ; TISS-28 ; Intensive care unit ; Nursing workload
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To evaluate the performance of the Simplified Therapeutic Intervention Scoring System on an independent database and determine its relation with the Therapeutic Intervention Scoring System in the quantification of nursing workload in intensive care. Design: Analysis of the database of a multicenter prospective Portuguese study. Setting: 19 intensive care units (ICUs) in Portugal. Patients: Data on 1094 patients consecutively admitted to the ICUs were collected during a period of 3 months. Methods: Collection of the data necessary for the calculation of the Therapeutic Intervention Scoring System (TISS-76) and the Simplified Therapeutic Intervention Scoring System (TISS-28) during the first 24 h in the ICU. Basic demographic statistics and all the variables necessary for the computation of the Simplified Acute Physiology Score II were also collected. Vital status at discharge from the hospital was registered. Regression techniques, Pearson's correlation and paired sample t-test were used. Results are presented as mean ± standard deviation except when stated otherwise. Reliability was evaluated by the use of intraclass correlation coefficients in a 5 % random sample. Measurements and results: After exclusion of all the patients with missing data, 1080 patients were analysed. The overall mean TISS-28 (29.82 ± 10.64) was significantly lower than the mean TISS-76 (31.14 ± 11.95). Both systems showed very significant differences between ICUs (p 〈 0.001). The correlation between the two was good, with TISS-28 explaining 72 % of the variation of TISS-76 (r = 0.85, r 2 = 0.72). The relation between the two systems was TISS-28 = 6.22 + 0.85 TISS-76. In this cohort, reliability of data collection was very high, with intraclass correlation coefficients greater than 0.90 for both systems. Conclusions: TISS-28 was validated on this independent population. The results indicate that TISS-28 can replace TISS-76 for the measurement of the nursing workload in Portuguese ICUs
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340050387
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  • 6
    Electronic Resource
    Electronic Resource
    Optical investigation of atomic steps in ultrathin InGaAs/InP quantum wells grown by vapor levitation epitaxy (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 442-444 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ultrathin InGaAs/InP single quantum well structures, grown by chloride transport vapor levitation epitaxy, have been investigated by low-temperature photoluminescence (PL). Well-resolved multiple peaks are observed in the PL spectra, instead of an expected single peak. We attribute this to monolayer (a0/2=2.93 A(ring)) variations in quantum well (QW) thickness. Separate peak positions for QW thicknesses corresponding to 2–6 monolayers have been determined, providing an unambiguous thickness calibration for spectral shifts due to quantum confinement. The PL peak corresponding to two monolayers occurs at 1.314 eV, corresponding to an energy shift of 524 meV. Experimental data agree very well with a simple effective mass theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100946
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  • 7
    Electronic Resource
    Electronic Resource
    Magnetic particle–particle interaction in frozen magnetic fluids (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 7931-7935 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic resonance is used to study magnetic dipole particle–particle interaction in ionic water-based iron-manganese magnetic fluids. A set of six samples having particle concentration running from 1.2×1016 to 6.3×1016 particles/cm3 were frozen below room temperature and analyzed in the range of 100–250 K. Average values of magnetic particle–particle interaction energy were obtained from the temperature dependence of the resonance linewidth broadening. At 1.2×1016 particles/cm3 magnetic particle–particle interaction energy is found to be of the order of 1.2 meV. However, at 6.3×1016 particles/cm3 magnetic particle–particle interaction energy goes to 32 meV. The enhancement of the magnetic particle–particle interaction energy far beyond the linearity is associated to cluster structuration. A one-dimensional model for cluster structuration is presented. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362407
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  • 8
    Electronic Resource
    Electronic Resource
    An experimental design for microluminescence (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 3890-3892 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The description of a new experimental design for microluminescence is presented in this article. The design is based on the optical analysis of a magnified luminescent region and has been proven to be useful for studying the photon transport mechanism in a solid luminescent material. Lock-in detection and a liquid-nitrogen-cooled detector are used to obtain signal-to-noise ratio as good as 102. The performance of the system is discussed by using the measurements taken from a natural ruby crystal. Using transport theory to fit our data, we found the photon diffusion length in the ruby crystal to be on the order of 46 μm. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148007
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  • 9
    Electronic Resource
    Electronic Resource
    Microvibration sample magnetometer: A force-type measurement (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 411-414 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple microvibrating sample magnetometer (MVSM), particularly inexpensive, sensitive, and versatile has been developed. An alternating magnetic field superposed to a steady uniform magnetic field is applied to the sample. The sample undergoes a periodic motion around an equilibrium position, causing a pressure fluctuation within a closed gas cell which is detected as an acoustic signal by a microphone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138313
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  • 10
    Electronic Resource
    Electronic Resource
    Irreversibility of zero-field birefringence in ferrofluids upon temperature reversal (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 2307-2311 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The temperature dependence of the zero-field birefringence was investigated using acid and basic MnFe2O4 ionic magnetic fluids, in the range of 290–350 K. Approaching a characteristic temperature (Tc) from below, which depends upon the sample characteristics, the zero-field birefringence goes critically down to zero. Furthermore, the birefringence shows an irreversible path upon heating and cooling the samples above Tc. The experimental data are successfully explained as long as dimers are included in the model calculation and the thermal disruption of them follows a critical behavior. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372179
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