Data presented here were collected during the cruise HE527 with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany (March 19, 2019 - March 31, 2019). In total, 140 underwater light profiles were collected at 76 stations, using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 189, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 532) and a radiance sensor for upwelling radiance (Lu, SN 421). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 533). The sensors were calibrated by the manufacturer and validated prior to the cruise with a reference lamp. Data were recorded with the SatView software (V 2.9.5_7) and processed from raw to Level1, 1b, 2, 2s to Level 3a using the ProSoft Processing software (V 7.7.19_2). Measured data were binned in 0.5 m depth intervals. A dark correction was made automatically based on shutter measurements by the instrument. Measurements with a tilt higher than 10° were not taken into account during processing. Spectra were interpolated to 1 nm intervals. For each station the hyperspectral profiles for each parameter cover the wavelength range from 400-700 nm, for Ed and Es in [W/m² nm], for Lu in [W/m² nm sr]. For Ed, Lu and Es descriptive statistics are given including min, max, mean, median and standard deviation of the tilt and the photosynthetically active radiation PAR [µmol photons/m² s (sr)], integrated from 400 - 700 nm. Statistics are not given for profiles which do not reach the 1% PAR depth. To allow an assignment of above water conditions to the respective depth measurements, Es spectra were given as a function of depth, recalculated from data Level2s. The profiler measurements were only conducted during daylight. Raw data are available on request from the principal investigator.
Data presented here were collected during the cruise HE516 with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany (July 17th, 2018 - August 15th, 2018). In total, 169 underwater light profiles were collected at 75 stations (with at least three repititions), using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 189, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 532) and a radiance sensor for upwelling radiance (Lu, SN 421). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 533). The sensors were calibrated by the manufacturer and validated prior to the cruise with a reference lamp. Data were recorded with the SatView software (V 2.9.5_7) and processed from raw to Level1, 1b, 2, 2s to Level 3a using the ProSoft Processing software (V 7.7.19_2). Measured data were binned in 0.5 m depth intervals. A dark correction was made automatically based on shutter measurements by the instrument. Measurements with a tilt higher than 10° were not taken into account during processing. Spectra were interpolated to 1 nm intervals. For each station the hyperspectral profiles for each parameter cover the wavelength range from 400-700 nm, for Ed and Es in [W/m² nm], for Lu in [W/m² nm sr]. For Ed, Lu and Es descriptive statistics are given including min, max, mean, median and standard deviation of the tilt and the photosynthetically active radiation PAR [µmol photons/m² s (sr)], integrated from 400 - 700 nm. Statistics are not given for profiles which do not reach the 1% PAR depth. To allow an assignment of above water conditions to the respective depth measurements, Es spectra were given as a function of depth, recalculated from data Level2s. The profiler measurements were only conducted during daylight. Raw data are available on request from the principal investigator.
Data presented here were collected during the cruise HE503 with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany (February 21st, 2018 - March 3rd, 2018). In total, 63 underwater light profiles were collected at 46 stations (with at least three repititions), using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 189, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 532) and a radiance sensor for upwelling radiance (Lu, SN 421). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 533). The sensors were calibrated by the manufacturer and validated prior to the cruise with a reference lamp. Data were recorded with the SatView software (V 2.9.5_7) and processed from raw to Level1, 1b, 2, 2s to Level 3a using the ProSoft Processing software (V 7.7.19_2). Measured data were binned in 0.5 m depth intervals. A dark correction was made automatically based on shutter measurements by the instrument. Measurements with a tilt higher than 10° were not taken into account during processing. Spectra were interpolated to 1 nm intervals. For each station the hyperspectral profiles for each parameter cover the wavelength range from 400-700 nm, for Ed and Es in [W/m² nm], for Lu in [W/m² nm sr]. For Ed, Lu and Es descriptive statistics are given including min, max, mean, median and standard deviation of the tilt and the photosynthetically active radiation PAR [µmol photons/m² s (sr)], integrated from 400 - 700 nm. Statistics are not given for profiles which do not reach the 1% PAR depth. To allow an assignment of above water conditions to the respective depth measurements, Es spectra were given as a function of depth, recalculated from data Level2s. The profiler measurements were only conducted during daylight. Raw data are available on request from the principal investigator.
ORCA beschäftigt sich mit der Erforschung und Entwicklung von neuen Ansätzen für effiziente und langlebige anorganische und organische Konvertermaterialien in Weißlicht LEDs. Die zu Grunde liegenden Systeme können vollkommen ohne oder zumindest mit einem signifikant niedrigeren Gehalt an Seltenen Erden (wie z.B. Yttrium, Lutetium) auskommen. Im Detail werden organische Konversionsleuchtstoffen erforscht, welche die vorhandenen Anforderungen der Allgemeinbeleuchtung bezüglich Farbe, Effizienz, Zuverlässigkeit und Lebensdauer erfüllen. Durch Einbettung in neue Matrixmaterialien kann die Stabilität dieser Farbstoffe beträchtlich erhöht werden, wodurch sie eine Alternative zu konventionellen seltenerdhaltigen Materialien darstellen. Im Projekt werden zwei Konzepte überprüft, zum einen sollen organische Konversionsleuchtstoffe komplett die klassischen Farbstoffen ersetzen, zum anderen kann durch Kombination von traditionellen Farbstoffen mit den organischen Verbindungen zumindest der Gehalt an Seltenen Erden drastisch reduziert werden. Zudem sollen Anwendungskonzepte in LED-basierten Lichtquellen entwickelt werden, die für die Leuchtstoffe besonders vorteilhafte Einsatzbedingungen erlauben und damit im System sogar effizienter werden können als heutige LEDs. Die angestrebten Forschungsaktivitäten ermöglichen Weißlicht-LEDs mit organischen oder anorganischen Konvertern oder einer Kombination aus diesen, die im Vergleich zum Stand der Technik erhebliche Vorteile aufweisen: - Drastische Kostensenkung der anorganischen Konverter um bis zu 70% durch den Austausch von Seltenen Erden durch Erdalkali-Metalle - Unabhängigkeit von geopolitisch beeinträchtigten Marktzugängen und verstärkte Nutzung einheimischer und preiswerter Rohstoffe - Steigerung der Konversionseffizienz (größer als 90%), Stabilität und der Lebensdauer organischer Konverter (LM 80 @ 50.000 Stunden) in LED-Anwendungen - Neuartige Matrixmaterialien für Einbettung der Konverter sowie deren bessere Verarbeitbarkeit in der LED-Herstellung.
Major and trace elements in the 100 m drilling core samples from Lake Baikal have been determined by ICP-AES (inductively coupled plasma atomic emission spectrometry), ICP-MS (inductively coupled plasma mass spectrometry) and INAA (instrumental neutron activation analysis). In this paper, vertical distribution profiles of the determined elements are presented. Raw analytical values will be presented elsewhere. Vertical distribution patterns for Ti, Al, Fe, Mn, Ca and Pare shown in Fig.1. In the bottom surface sample (=the uppermost part of the core), the concentration of Al, Ti, Fe and Ca are relatively low and that of P is relatively high. It may indicate that relative large volume of biogenic organic substances are included in the bottom surface sample. In addition, it seems that the Mn contents are relatively low and its deviation is rather small between 60 m and 90 m from the bottom.
In order to get a complete geochemical signature, 14 P-rich concretions, chosen among the different cores, were acid digested (Table 3a and Table 3b). In a clean laboratory, 1.7 to 36 mg of concretions were digested overnight in a concentrated mixture of Suprapur acid (3 ml HCl/2 ml HNO3/1 ml HF) at 90 °C in sealed Teflon beakers. After evaporation to dryness, the residue was dissolved in 2.5 ml of 2% HNO3 Suprapur and diluted to 12 ml with Milli-Q water. During the same procedure, we have also dissolved and analysed, for comparison, a pure vivianite from Anlua, Cameroon (tubular crystals, MRAC collection).
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