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  • 1
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    PANGAEA
    In:  Supplement to: Foster, William J; Lehrmann, Daniel; Yu, Meiyi; Ji, Li; Martindale, Rowan C (2018): Persistent Environmental Stress Delayed the Recovery of Marine Communities in the Aftermath of the Latest Permian Mass Extinction. Paleoceanography and Paleoclimatology, 33(4), 338-353, https://doi.org/10.1002/2018PA003328
    Publication Date: 2023-01-13
    Description: The aftermath of the late Permian mass extinction is a key interval for the evolution of modern marine ecosystems. It has been hypothesized that the magnitude of the mass extinction delayed the subsequent recovery, and so to test this, we undertook the highest resolution study to date of the post-extinction (Griesbachian) microbialite unit on the Great Bank of Guizhou, South China. The benthic community from the microbialite unit is taxonomically diverse when compared to other coeval deposits, recording both inarticulate and articulate brachiopods, crinoids, echinoids, bivalves, gastropods, microconchids, and ostracods. Here we recognize 49 taxa from 4557 individuals, which raise the known diversity of the Great Bank of Guizhou basal microbialite unit to 84 invertebrate species, making it the most diverse Early Triassic community currently reported. 89% of the genera are Permian holdovers, whilst only 13% of the species are Permian holdovers. This new data record no temporal trends in the species richness, Simpson diversity, Simpson effective diversity, taxonomic distinctness, functional diversity, or body size of the benthos during the post-extinction microbialite unit. Nevertheless, the small body sizes of the benthic community, and the large lophophoral cavity in the lingulid brachiopod, Sinolingularia huananensis, suggests that these animals lived in a highly stressed environment. We propose that the microbialite unit contains a survival fauna in an interval that represents persistent environmental stress from the late Permian mass extinction event, associated with deoxygenation, high temperatures, elevated atmospheric carbon dioxide levels (pCO2), and elevated primary productivity.
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 2
    Publication Date: 2023-01-13
    Keywords: China; DISTANCE; Epoch; Formation; MULT; Multiple investigations; Stage; Youjianzhai; Zone; δ13C, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 320 data points
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  • 3
    Publication Date: 2023-01-13
    Keywords: Body length; China; Dajiang; Dawen; Dongjawen_I; Dongjawen_II; Event label; Houchang; Latitude of event; Longitude of event; MULT; Multiple investigations; Rongbao; Sample code/label; Species; Youjianzhai
    Type: Dataset
    Format: text/tab-separated-values, 8712 data points
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  • 4
    Publication Date: 2023-01-13
    Keywords: Abundance; China; Contribution; Group; Guizhou_GrBank; MULT; Multiple investigations; Similarity; Similarity index; Similarity index, standard deviation; Species
    Type: Dataset
    Format: text/tab-separated-values, 211 data points
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  • 5
    Publication Date: 2023-07-10
    Keywords: Astartella stefaniae; Astartopsis sp.; Atomodesma sp.; Austrotindaria antiqua; Austrotindaria canalensis; Austrotindaria svalbardensis; Bakevellia ceratophaga; Bakevellia exporrecta; Bakevellia sp.; China; Claraia liuqiaoensis; Coelostylina sp.; Cossmannina sp.; Crurithyris sp.; Dacryomya skorochodi; Dajiang; Dawen; Dicellonema abrekensis; Donaldina sp.; Dongjawen_I; Dongjawen_II; Echinoidea; Eucochlis obliquecostata; Eumorphotis shajingengi; Event label; Gervilleria sp.; Gervillia albertii; Glabrocingulum sp.; Hoernesia sp.; Holocrinus sp.; Houchang; Latitude of event; Leptochondria albertii; Longitude of event; Microconchus aberrans; Modiolus cf. trequetra; MULT; Multiple investigations; Myalinella newelli; Myalinella postcarbonica; Naticopsis sp.; Neoschizodus laevigatus; Orbicoelia speciosa; Orbiculoidea elegans; Ostracoda; Palaeonarica guangxinensis; Permophorus bregeri; Promyalina putiatinensis; Pteria ussurica variabilis; Retispira aisatica; Rhynchonellata; Rongbao; Sample code/label; Scythentolium scutigerulus; Scythentolium sp.; Sinoingularia huananensis; Towapteria scythica; Unionites munsteri; Vernelia sp.; Wannerispira shangganensis; Warthia vaceki; Youjianzhai
    Type: Dataset
    Format: text/tab-separated-values, 1650 data points
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 151-154 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A silicon interlayer was introduced between the DLC films and 202 stainless steelsubstrate using a medium frequency magnetron sputtering. The adhesion was evaluated by thescratch tests and wear tests together. Two main parameters in the deposition process of Siinterlayers, i.e. the sputtering current and pulse bias voltage, were optimized respectively, and theaction mechanisms were discussed as well. Moreover, a special treatment with the purpose offorming a complete graded intermixed Si-Fe interface was designed to improve the adhesionstrength further. DLC films with good adhesion strength were deposited on 202 stainless steelsubstrates using a silicon interlayer
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 1237-1240 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The effect of strain rate on the dynamic compressive of carbon/epoxy composite materialswas investigated via the split Hopkinson pressure bar (SHPB) technique. The specimens were testedin the thickness, as well as in the in-plane direction at different high strain rates. The macro- andmicro-fracture morphology of the damaged laminated specimens was obtained utilizing the scanningelectron microscope (SEM). The experimental results showed that the compressive properties couldbe significantly affected by the strain rates. The compressive strength and the ultimate strain in thein-plane direction were obviously lower than that in the thickness direction. As the strain rateincreased, the laminate had not enough time to respond, the splitting failure of 0° ply of laminatesloaded in-plane along 0° was firstly found, then interfacial crack and delamination were induced, thespecimens were crushed to fragments at the highest strain rate. No obvious damage of laminatesloaded through the thickness could be observed at strain rate below 2000 s-1. The main way of thedynamic compressive failures through the thickness was shear failure due to the brittle fracture ofthe fiber at 2260 s-1
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1254
    Keywords: Marathon ; Weather conditions ; Correlation analysis ; Exercise physiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract The relationships between the results of Beijing International Marathon Races and the corresponding weather conditions are analysed quantitatively. There are obvious interrelationships between the marathon results and weather factors such as air temperature, wet bulb temperature and human biometeorological indices. For example, the correlation coefficient between the average times of the top ten finishers and temperature isr=0.8910. The meteorological conditions are classified into three categories, suitable, moderate and unsuitable for running a marathon race, and the optimum meteorological index is given. Also the concept of a meteorological result, i.e. the part of the actual performances fluctuating with the changes in weather conditions, is presented. This plays an important role in some kinds of sports such as marathon racing. Finally, the results of physiological tests are given, which illustrate the physiological reactions of long- and middle-distance runners to the surrounding temperature.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Molecular and cellular biochemistry 156 (1996), S. 17-24 
    ISSN: 1573-4919
    Keywords: antioxidant enzymes ; heart ; buthionine sulfoximine ; GSH-deficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The role of glutathione (GSH) in myocardial antioxidant defense was investigated in Swiss-Webster mice either performing swim exercise to exhaustion or rested in both the GSH adequate (GSH-A) and GSH deficient (GSH-D) states. GSH deficiency was accomplished by injecting mice with L-buthionine [S,R]sulfoximine (BSO; 2 nmol/kg body wt, i.p.) and providing BSO (20 mM) in drinking water for 12 days. GSH and glutathione disulfide (GSSG) contents in the GSH-D hearts were decreased to 10 and 8%, respectively, of those in the GSH-A mice. This decrease was associated with a significant decline of the total glutathione level in the liver, skeletal muscle and plasma. Myocardial GSH peroxidase and GSH sulfur-transferase activities decreased significantly following GSH deficiency, whereas superoxide dismutase activity was significantly elevated. GSH deficiency did not affect exercise endurance performance. However, exhaustive exercise decreased GSH content in the myocardium of the GSH-A and GSH-D mice by 22 and 44% (p 〈 0.05), respectively. The GSH:GSSG ratio was not altered significantly following exercise because of a concomitant decrease in GSSG (p 〈 0.05). γ-Glutamyltranspeptidase activity was significantly increased after exercise, especially in the GSH-D hearts (72%; p 〈 0.05). GSH content after exercise correlated negatively with exercise time in both GSH-A and GSH-D mice (p 〈 0.05). These data indicate that GSH is actively used in the myocardium during prolonged exercise at moderate intensity and that GSH deficiency is tolerated by the heart, possibly compensated for by an increased GSH uptake from the plasma.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-4986
    Keywords: monoclonal antibody ; O-acetylated sialic acid ; ganglioside ; synaptophysin ; embryonic development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract We have previously detected an alkali-labile and developmentally regulated antigen in rat embryonic cerebral cortex, which may be 9-O-acetylsialylated GT3 ganglioside (Hirabayashi Y, Hirota M, Suzuki Y, Matsumoto M, Obata K, Ando S (1989) Neurosci Lett 106:193–98). In this study we established a mouse monoclonal antibody, 493D4, that recognizes 9-O-acetyl GT3 ganglioside, but not non-O-acetyl gangliosides. This antibody also reacted with 9-O-acetyl GD3 to a much lesser extent. By using this antibody, we found that O-acetyl GT3 as well as O-acetyl GD3 were expressed strongly in fetal murine cerebral cortex and decreased to an undetectable level after birth. With the assistance of TLC-immunostaining using 493D4 together with Q-Sepharose column chromatography, O-acetyl gangliosides of bovine brain were purified and the structural analysis showed the presence of O-acetyl GD3, O-acetyl LD1, O-acetyl GD2 and O-acetyl GD1b in the adult brain as extremely minor components. Interestingly, the antibody 493D4 could detect O-acetyl sialoglycoproteins in rat brain tissues. One of the major immunoreactive proteins was shown to be synaptophysin, an integral membrane protein specifically present in synaptic vesicles. This monoclonal antibody was therefore useful for sensitive detection of both O-acetylated gangliosides and glycoproteins with O-acetylated sialic acids. Abbreviations: Ac, acetyl group; mAb, monoclonal antibody; HPTLC, high performance thin-layer chromatography; ELISA, enzyme-linked immunosorbent assay; HPLC, high performance liquid chromatography; HRP, horse radish peroxidase; FAB-MS, fast atom bombardment mass spectrometry; NeuAc, N-acetylneuraminic acid; Gal, galactose; GalNAc, N-acetylgalactosamine; Glc, glucose; GlcNAc, N-acetylglucosamine; Cer, ceramide; LD1, NeuAc(α2-8)NeuAc(α2-3)Gal(β1-4)GlcNAc(β1-3)Gal(β1-4)Glc(β1-1)Cer. Ganglioseries are abbreviated according to the system of Svennerholm [1]
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