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  • 1
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    Unbekannt
    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publikationsdatum: 2023-05-12
    Schlagwort(e): Area/locality; Depth, bottom/max; Depth, top/min; ELEVATION; Heat flow; LATITUDE; LONGITUDE; Sample, optional label/labor no; Temperature gradient
    Materialart: Dataset
    Format: text/tab-separated-values, 35 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
  • 2
    Digitale Medien
    Digitale Medien
    Catabolism of itaconic acid by preformed mats of aspergillus terreus (1962)
    Springer
    Archives of microbiology 41 (1962), S. 261-267 
    Details
    ISSN: 1432-072X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The breakdown of itaconic acid by preformed mats of a local strain of Aspergillus terreus was studied using the zone-strip technique. Low pH values restrained the uptake of itaconic acid and the accumulation of various other acids while higher pH values exerted an opposite effect. The results obtained when using various enzyme inhibitors were those anticipated on basis of the direct transformation of itaconic to aconitic acid through the fixation of CO2 and of the existence of the T.A.C. (tricarboxylic acid cycle) as a main metabolic channel operating in this organism.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00403606
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Biosynthesis of itaconic acid by aspergillus terreus (1962)
    Springer
    Archives of microbiology 44 (1962), S. 181-188 
    Details
    ISSN: 1432-072X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The formation of itaconic, aconitic and other acids from glucose in the presence of some enzyme inhibitors or organic acids by Aspergillus terreus was studied. Moreover, the metabolic activities of the preformed mats when floated on solutions of some organic acids were traced. When the resulting information were collected together a presumed condensation reaction between acetate and succinate could be formulated. The reaction product, presumably 1, 2, 3 propane tricarboxylic acid, would undergo a dehydrogenation reaction to yield aconitic acid and subsequently itaconic acid. It has also been suggested that aconityl CoA may be the metabolic form which suits the reactions leading to the formation of itaconic acid. The presumed aconityl CoA may be formed either through a condensation reaction between acetyl CoA and succinate or acetate with succinyl CoA.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00408905
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Biosynthesis of fat from some organic acids in submerged cultures of penicillium spinulosum (1961)
    Springer
    Archives of microbiology 39 (1961), S. 292-297 
    Details
    ISSN: 1432-072X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The formation of fat from citric, succinic, fumaric and malic acids by Penicillium spinulosum has been investigated. Sodium arseite, β-sulfonic propionic acid and mono-iodoacetate was found to control unfavourably the formation of fat from the organic acids by the preformed pellets of the organism. Moreover, iodoacetate reduced the mean molecular weight of the component fatty acids. The β-sulfonic propionic acid though reduced the yields of fat yet the ratio fat/100 g of acid consumed was not markedly altered by this compound. A modified chromatographic method was described for the assay of different acids.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00439525
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    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Near-infrared absorption of CuGaTe2 and CuGaSe2 thin films (1995)
    Springer
    Journal of materials science 6 (1995), S. 108-110 
    Details
    ISSN: 1573-482X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Maschinenbau
    Notizen: Abstract Near-infrared absorption spectra of p-type CuGaTe2 and CuGaSe2 thin films deposited by thermal evaporation were measured at room temperature. Two structures were found in the spectra in the photon energy range from hv = 0.4–1.5 eV. One of them is the free carrier absorption below 0.6 eV in which the absorption coefficient increases as the third power of the wavelength. Another structure seems from carrier concentration dependences to be associated with an absorption band at hv ≅ 0.95 eV for CuGaTe2 and 0.75 eV for CuGaSe2 due to transition from a lower-lying valence band to an upper one. From the optical absorption data also, the ionization energy of the acceptor level was found to be 190 meV for CuGaTe2 and 280 meV for CuGaSe2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00188193
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    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Effect of larval selection with two bioinsecticides on susceptibility levels and reproductive capacity ofAedes aegypti (L.) (1987)
    Springer
    Journal of pest science 60 (1987), S. 55-57 
    Details
    ISSN: 1612-4766
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Zwei bakterielle Insektizide,Bacillus thuringiensis H-14 undB. sphaericus 1593 wurden hinsichtlich ihrer larviziden Wirkung auf die Larven der StechmückeAedes aegypti untersucht. Die LC50-Werte zeigten, daßB. thuringiensis H-14 (4×105 Sporen/ml) wirkungsvoller gegen die L4 vonA. aegypti waren alsB. sphaericus (3,1×106 Sporen/ml), und zwar um das 7,75fache. Eine larvale Selektion mit LC90 beider Pathogene 8 Generationen hindurch, verursachte eine Abnahme der Empfindlichkeit gegenüber dem Pathogen, verglichen mit unbehandelten Stämmen. Andererseits zeigten die Ergebnisse, daß die larvale Selektion durch die beiden Pathogene zu einer beträchtlichen Verminderung der Eiproduktion und der Eischlüpfquote von Mücken, die aus überlebenden Larven hervorgingen, führte.
    Notizen: Abstract Two bacterial insecticides,Bacillus thuringiensis H-14 andB. sphaericus 1593 were evaluated for larvicidal potency against mosquito larvae ofAedes aegypti. LC50 values showed thatB.thuringiensis H-14 (4×105 spores/ml) had a higher pathogenicity against fourth larval instars ofA. aegypti thanB. sphaericus (3.1×106 spores/ml) by about 7.75 times. Larval selection with LC90 of both pathogens for 8 successive generations caused a decrease in the susceptibility levels of selected strains ofA. aegypti as compared with the original strain. Moreover, the results indicated that the effect of larval selection with the above bioinsecticides led to an obvious reduction in the egg production and hatchability of eggs produced by mosquito adults that developed from surviving larvae.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01903188
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    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Sustained-release formulations ofBacillus thuringiensis serotype H-14 and plastic formulations of Abate for long-term control of mosquito larvae (1989)
    Springer
    Journal of pest science 62 (1989), S. 158-160 
    Details
    ISSN: 1612-4766
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Es wurde die larvizide Aktivität von im Wasser ausgebrachten, brikett-gebundenen Formulierungen vonBac. thuringiensis H-14 (Bactimos)_sowie pellet-gebundenen Formulierungen von Abate gegen die Larven vonAedes aegypti (L.) untersucht. Die getesteten Formulierungen ermöglichten eine wirksame Bekämpfung mit 90–100% Larvenmortalität für mehrere Wochen. Die Anwesenheit von im Wasser schwebenden Bodenbestandteilen war mit einer Verringerung der Larvenmortalität verbunden und reduzierte die Wirkungsdauer von Bactimos bzw. Abate um das 1,8-bzw. 2,2fache. Die Anwendung solcher Formulierungen konnte das Schlüpfen der nach der Applikation abgelegten Eier zwar nicht verhindern, doch waren alle geschlüpften Larven außerstande, sich weiter als bis zur L2 zu entwickeln.
    Notizen: Abstract The larvicidal activity of sustained-release formulations ofBacillus thuringiensis H-14 (Bactimos briquets) and controlledrelease plastic formulations of Abate against mosquito larvae ofAedes aegypti (L.) has been evaluated. The test formulations provided continuous effective control with 90–100% larval mortality for several weeks. The presence of suspended soil constituents was associated with a lowering of larval mortality and tended to reduce the durations of effective control of Bactimos and Abate plastic pellets against mosquito larvae by about 1.8 and 2.2 times, respectively. Treatments with such formulations did not appear to prevent hatch of eggs which oviposited after application, but all newly hatched larvae failed to develop beyond the second instar.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01907341
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    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Use of plastic formulations of chlorpyrifos and sumithion as mosquito larvicides and their delayed effects on the basal follicle numbers developed by female survivors (1988)
    Springer
    Journal of pest science 61 (1988), S. 14-17 
    Details
    ISSN: 1612-4766
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Drei granulierte (Plastik)-Formulierungen von Chlorpyrifos und Sumithion ergaben gegenCulex pipiens-Zweitlarven 90–100% Mortalität, beim erstgenannten Wirkstoff nach 73–85 Tagen und beim zweitgenannten nach 48–64 Tagen. Außer dieser Letalwirkung zeigte sich bei überlebendenCulex-Weibchen eine Zunahme der Zahl der Basalfollikel und zwar bei Chlorpyrifos um 18,7–30,0% und bei Sumithion um 17,2–26,8%.
    Notizen: Abstract Tests were conducted to evaluate the larvicidal effectiveness of three controlled-release plastic formulations of both chlorpyrifos and sumithion against mosquito larvae ofCulex pipiens. Excellent control with 90–100% larval mortality was achieved for 85, 77, 73, and 64, 54, 48 days posttreatment by using the non-expanded, expanded and foamed formulations of chlorpyrifos and sumithion, respectively. Apart from lethal action, larval treatments with the above formulations led to an increase in the mean number of basal follicles developed by mosquito females which survived from these treatments. The increase in this mean per female was in respect 23.4, 30.0, 18.7% in case of chlorpyrifos formulations, and 21.8, 17.2, 26.8% in case of sumithion formulations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01906120
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    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Subsurface temperature measurements and terrestrial heat flow estimates in the Aswan region, Egypt (1995)
    Springer
    Studia geophysica et geodaetica 39 (1995), S. 162-176 
    Details
    ISSN: 1573-1626
    Schlagwort(e): borehole temperatures ; terrestrial heat flow
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geologie und Paläontologie , Physik
    Notizen: Summary The results of temperature measurements in six boreholes, drilled near the west shores of the Lake Nasser in the Aswan region in the Nubian Desert, are reported. Temperature-depth profiles, complemented by thermal conductivity determinations of surface rock samples, were used to calculate the existing range of heat flow density in the region as 40 ÷ 60 mWm−2, which is consistent with the values from the adjacent areas, reported in the literature. The extrapolated mean annual ground surface temperatures amount, on the average, to 30°C, which is 3 K higher than the mean annual air temperature in the region.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02296073
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    Artikel (Nationallizenzen)
    Volltext
  • 10
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    Relationship between Intensity and Recorded Ground-Motion and Spectral Parameters for the Himalayan Region (2016)
    Seismological Society of America (SSA)
    Details
    Publikationsdatum: 2016-07-26
    Beschreibung: Empirical relationships between the macroseismic intensity and the ground-motion parameters for the Himalayan region are derived in this study. A strong-motion database from 21 moderate-to-large earthquakes, along with their corresponding macroseismic intensity, is considered. All the intensity values are inferred from isoseismal maps and earthquake damage reports and then converted to the modified Mercalli intensity (MMI) scale. An orthogonal regression analysis is used to find the best correlation between MMI and peak ground acceleration (PGA), peak ground velocity (PGV), and pseudospectral acceleration (PSA) at 0.3, 1.0, 2.0, and 3.0 s to accommodate the uncertainty in the regression coefficients. In addition to the ground-motion parameters, the MMI is related to other potential independent variables, including the moment magnitude, the hypocentral distance, and the 30-m average shear-wave velocity ( V S 30 ). The study shows that site effect is noticed predominantly in the MMI–PGA relationship for a hypocentral distance of more than 200 km. When relating MMI with PGV, PSA 0.3 s , PSA 1.0 s , PSA 2.0 s , and PSA 3.0 s , however, the contribution of site effects to the correlation is negligible. To eradicate the site effect in the PGA–MMI relationship, the derived empirical relationship is modified, based on the statistical analysis of MMI observed and MMI predicted, with or without including V S 30 as a potential independent variable. Furthermore, the developed regression models are verified using several statistical tests, the F -test, the t -test, the Durbin–Watson test, and the Breusch–Pagan test. Additionally, the Euclidean distance concept is evaluated in the study. It was concluded that the PGA is a good indicator for deriving the MMI value in the Himalayan region, but that one should use site-specific MMI versus PGV and MMI versus PSA relationships to predict reliable parameters.
    Print ISSN: 0037-1106
    Digitale ISSN: 1943-3573
    Thema: Geologie und Paläontologie , Physik
    Publiziert von Seismological Society of America (SSA)
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