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  • 2015-2019  (151)
  • 1995-1999  (34)
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  • 1
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    Generation of Rho Zero Cells: Visualization and Quantification of the mtDNA Depletion Process (2015)
    Molecular Diversity Preservation International
    Details
    Publication Date: 2015-04-30
    Print ISSN: 1661-6596
    Electronic ISSN: 1422-0067
    Topics: Chemistry and Pharmacology
    Published by Molecular Diversity Preservation International
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    PAPER CURRENT
  • 2
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    Processing of Artificial Peptide-DNA-Conjugates by the Mitochondrial Intermediate Peptidase (MIP) (1999)
    De Gruyter
    Details
    Publication Date: 1999-01-01
    Print ISSN: 1431-6730
    Electronic ISSN: 1437-4315
    Topics: Biology , Chemistry and Pharmacology
    Published by De Gruyter
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    PAPER CURRENT
  • 3
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    Mineralogical analysis of drill core Omok-1 at Omokoroa, Bay of Plenty (2017)
    PANGAEA
    In:  Supplement to: Kluger, Max Oke; Moon, Vicki G; Kreiter, Stefan; Lowe, David J; Churchman, G J; Hepp, Daniel A; Seibel, David; Jorat, Ehsan M; Mörz, Tobias (2017): A new attraction-detachment model for explaining flow sliding in clay-rich tephras. Geology, 45(2), 131-134, https://doi.org/10.1130/G38560.1
    Details
    Publication Date: 2023-03-03
    Description: Altered pyroclastic (tephra) deposits are highly susceptible to landsliding, leading to fatalities and property damage every year. Halloysite, a low-activity clay mineral, is commonly associated with landslide-prone layers within altered tephra successions, especially in deposits with high sensitivity, which describes the post-failure strength loss. However, the precise role of halloysite in the development of sensitivity, and thus in sudden and unpredictable landsliding, is unknown. Here we show that an abundance of mushroom cap?shaped (MCS) spheroidal halloysite governs the development of sensitivity, and hence proneness to landsliding, in altered rhyolitic tephras, North Island, New Zealand. We found that a highly sensitive layer, which was involved in a flow slide, has a remarkably high content of aggregated MCS spheroids with substantial openings on one side. We suggest that short-range electrostatic and van der Waals interactions enabled the MCS spheroids to form interconnected aggregates by attraction between the edges of numerous paired silanol and aluminol sheets that are exposed in the openings and the convex silanol faces on the exterior surfaces of adjacent MCS spheroids. If these weak attractions are overcome during slope failure, multiple, weakly attracted MCS spheroids can be separated from one another, and the prevailing repulsion between exterior MCS surfaces results in a low remolded shear strength, a high sensitivity, and a high propensity for flow sliding. The evidence indicates that the attraction-detachment model explains the high sensitivity and contributes to an improved understanding of the mechanisms of flow sliding in sensitive, altered tephras rich in spheroidal halloysite.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 4
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    (Figure 2c) Halloysite bulk concentration of drill core Omok-1 (2017)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: CDRILL; Center for Marine Environmental Sciences; Core drilling; DEPTH, sediment/rock; Halloysite; MARUM; Omok-1; Omokoroa, Western Bay of Plenty, New Zealand
    Type: Dataset
    Format: text/tab-separated-values, 55 data points
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    DATA PANGAEA
  • 5
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    (Figure 2b, 2d, 2e, and 2f) Shear strength, sensitivity, halloysite bulk concentration, cumulative volume percent, average spheroid sizes, and spheroid content of drill core Omok-1 (2017)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: CDRILL; Center for Marine Environmental Sciences; Core drilling; DEPTH, sediment/rock; MARUM; Omok-1; Omokoroa, Western Bay of Plenty, New Zealand; Sensitivity; Shear strength; Shear strength, maximum; Size; Standard deviation; Sum; Volume
    Type: Dataset
    Format: text/tab-separated-values, 333 data points
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    DATA PANGAEA
  • 6
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    Seawater carbonate chemistry and metabolic rate, ventilation rate and critical oxygen partial pressure of Dosidicus gigas and Doryteuthis pealeii (2018)
    PANGAEA
    In:  Supplement to: Birk, Matthew A; McLean, Erin L; Seibel, Brad A (2018): Ocean acidification does not limit squid metabolism via blood oxygen supply. Journal of Experimental Biology, 221(19), jeb187443, https://doi.org/10.1242/jeb.187443
    Details
    Publication Date: 2024-03-15
    Description: Ocean acidification is hypothesized to limit the performance of squid owing to their exceptional oxygen demand and pH sensitivity of blood–oxygen binding, which may reduce oxygen supply in acidified waters. The critical oxygen partial pressure (Pcrit), the PO2 below which oxygen supply cannot match basal demand, is a commonly reported index of hypoxia tolerance. Any CO2-induced reduction in oxygen supply should be apparent as an increase in Pcrit. In this study, we assessed the effects of CO2 (46–143 Pa; 455–1410 μatm) on the metabolic rate and Pcrit of two squid species - Dosidicus gigas and Doryteuthis pealeii – through manipulative experiments. We also developed a model, with inputs for hemocyanin pH sensitivity, blood PCO2 and buffering capacity, that simulates blood oxygen supply under varying seawater CO2 partial pressures. We compare model outputs with measured Pcrit in squid. Using blood–O2 parameters from the literature for model inputs, we estimated that, in the absence of blood acid–base regulation, an increase in seawater PCO2 to 100 Pa (1000 μatm) would result in a maximum drop in arterial hemocyanin–O2 saturation by 1.6% at normoxia and a Pcrit increase of 0.5 kPa. Our live-animal experiments support this supposition, as CO2 had no effect on measured metabolic rate or Pcrit in either squid species.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Behaviour; Benthos; Bicarbonate ion; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Doryteuthis pealeii; Dosidicus gigas; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gender; Growth/Morphology; Identification; Laboratory experiment; Length, mantle; Mass; Metabolic rate of oxygen; Mollusca; Nekton; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Oxygen, partial pressure; Oxygen, partial pressure, critical; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Registration number of species; Respiration; Salinity; Single species; Species; Temperate; Temperature, water; Type; Uniform resource locator/link to reference; Ventilation rate
    Type: Dataset
    Format: text/tab-separated-values, 2908 data points
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    DATA PANGAEA
  • 7
    Electronic Resource
    Electronic Resource
    Biochemical Markers of Bone Turnover Reflect Femoral Bone Loss in Elderly Women (1996)
    Springer
    Calcified tissue international 59 (1996), S. 328-333 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Osteoporosis — Elderly women — Biochemical markers — Bone loss — DXA.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. Although over 90% of hip fractures occur in patients over age 70, few data are available on femoral bone loss in this age group. To examine the relationship between biochemical markers of bone turnover and femoral bone loss in the elderly, 36 female and 17 male, healthy, community-dwelling elderly over age 65 (mean ± SD age: women 71 ± 4 years, men 75 ± 5 years) were followed for 3 years. Annual bone mineral density measurements of the hip and lumbar spine by dual-energy x-ray absorptiometry (DXA) were obtained and biochemical markers of bone resorption (urinary N-telopeptide crosslinks, free pyridinoline, total pyridinoline, total deoxypyridinoline, and hydroxyproline) and bone formation (serum osteocalcin, bone-specific alkaline phosphatase) were obtained at the end of year 3. In elderly women, longitudinal bone loss at the total hip was negatively correlated with markers of bone resorption (r =−0.39 to −0.52, P 〈 0.05), bone formation (r =−0.38, P 〈 0.05), and age (r =−0.39, P 〈 0.05). Markers of bone resorption were correlated with markers of bone formation (r = 0.63 to 0.74, P 〈 0.01). In multiple regression analysis, urinary N-telopeptide crosslinks (marker of resorption), serum osteocalcin (marker of formation), and serum parathyroid hormone explained 43% of the variability of bone loss at the total hip in women. These parameters were not related to bone loss in men. We conclude that femoral bone loss increases with age in women over 65. Measurements of specific biochemical markers of bone turnover are correlated with longitudinal bone loss in elderly women. These markers may help identify women at greatest risk for bone loss who would benefit most from therapeutic interventions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900135
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Deep-breathing cephalopods? (1996)
    [s.l.] : Nature Publishing Group
    Nature 384 (1996), S. 421-421 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR — Madan and Wells1 have explored the relationship between gill area and habitat depth. They suggest that the large gill areas found in some pelagic cephalopods enable them to cope with the hypoxic conditions present throughout much of the deep sea. This conclusion is not surprising as ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/384421b0
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  • 9
    Electronic Resource
    Electronic Resource
    Vampire blood: respiratory physiology of the vampire squid (Cephalopoda: Vampyromorpha) in relation to the oxygen minimum layer (1999)
    Springer
    Experimental biology online 4 (1999), S. 1-10 
    Details
    ISSN: 1430-3418
    Keywords: Deep sea ; Haemocyanin ; Hypoxia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The functional properties of the haemocyanin ofVampyroteuthis infernalis (Cephalopoda: Vampyromorpha), measured at 5 °C, are reported and discussed in relation to hypoxia. The oxygen affinity of this haemocyanin (P50=0.47−0.55 kPa) is higher than any previously measured for a cephalopod. The high cooperativity (n50=2.20−2.23) and Bohr coefficient (−0.22) suggest a true transport function for this haemocyanin. This high-affinity haemocyanin, in conjunction with moderate gill diffusion capacity, provides a sufficient oxygen gradient from the environment to the blood to support the low routine oxygen consumption rate of V. infernalis
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00898-999-0001-2
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  • 10
    Electronic Resource
    Electronic Resource
    Öko-Audit im Dienstleistungssektor (1999)
    Springer
    Standort 23 (1999), S. 42-45 
    Details
    ISSN: 1432-220X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Einleitung Seit die “Verordnung... über die freiwillige Beteiligung gewerblicher Unternehmen an einem Gemeinschaftssystem für das Umweltmanagement und die Umweltbetriebsprüfung” (Öko-Audit) im Jahr 1993 verabschiedet worden ist, hat die Zahl der Unternehmen, die sich an dem freiwilligen System beteiligen, stetig zugenommen. In Deutschland wird das System im Vergleich zu den anderen Mitgliedsstaaten der EU weitaus besser angenommen, so daß Deutschland zahlenmäßig die meisten auditierten Unternehmen aufweisen kann: Vom Frühjahr 1996 bis Januar 1997 stieg die Zahl der auditierten Unternehmen von ca. 200 auf über 500 (vgl. Vollmer, Braun & Soyez 1996, S. 534). Bislang beschränkt sich das Öko-Audit noch auf Unternehmen des produzierenden Gewerbes, während Dienstleistungsbetriebe Umweltmanagementsysteme “in Anlehnung” an das Ouml;ko-Audit einrichten oder auf die ISO 14000 ausweichen. Ebenso wie das Ouml;ko-Audit ist auch die ISO 14000 eine Norm, die die Einrichtung eines Umweltmanagementsystems nach bestimmten Maßgaben regelt. Anders als das Ouml;ko-Audit steht die ISO 14000 bereits allen Branchen offen und ist zudem weltweit bekannter (Dyllik & Hummel 1995, S. 25 f.). Die Konkurrenz zwischen beiden Systemen und der starke Anstieg der Zahl der auditierten Unternehmen waren der Anlaß, sich genauer mit den Innovationen “Ouml;ko-Audit” bzw. “Umweltmanagementsystem” auseinanderzusetzen. Insbesonders die schnell wachsende Zahl der auditierten Unternehmen und das Interesse der Dienstleistungsbetriebe auch am Gemeinschaftssystem “Ouml;ko-Audit” teilzunehmen, waren der Grund für die Annahme, daß sich das Ouml;ko-Audit nicht von selbst derart schnell ausbreitet, sondern daß die Ausbreitung unterstützt – also gesponsert – wird. Banken könnten nach Annahme der Autoren in diesem Prozeß in zweierlei Hinsicht eine interessante Rolle haben: Auf der einen Seite haftet den Banken ebenso wie allen anderen Dienstleistungsunternehmen das Image des “sauberen Dienstleisters” an, dessen Produktion keine Umweltauswirkungen zu haben scheint. Was für einen Sinn sollte also das Umweltengagement von Dienstleistungsunternehmen oder gar die Einrichtung eines Umweltmanagementsystems vor diesem Hintergrund haben? Andererseits wird den Banken “in der Wirtschaft” eine Schlüsselrolle und Multiplikatorfunktion in jeder Hinsicht zugeschrieben (Burzler & Rauberger 1996 S. 1). Insbesonders diese Möglichkeiten der Banken, den Ausbreitungsprozeß der Innovation “Ouml;ko-Audit” zu steuern und zu beschleunigen, waren Gegenstand der vorliegenden Untersuchung. Dazu wurden leitfadengestützte Interviews mit Vertretern verschiedener Abteilungen von deutschen Banken durchgeführt (im folgenden Text anonymisiert).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005489970018
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