Academic literature on the topic 'Giant diatoms'

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Journal articles on the topic "Giant diatoms"

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Burchell, M. J., K. H. McDermott, M. C. Price, and L. J. Yolland. "Survival of fossils under extreme shocks induced by hypervelocity impacts." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2023 (2014): 20130190. http://dx.doi.org/10.1098/rsta.2013.0190.

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Experimental data are shown for survival of fossilized diatoms undergoing shocks in the GPa range. The results were obtained from hypervelocity impact experiments which fired fossilized diatoms frozen in ice into water targets. After the shots, the material recovered from the target water was inspected for diatom fossils. Nine shots were carried out, at speeds from 0.388 to 5.34 km s −1 , corresponding to mean peak pressures of 0.2–19 GPa. In all cases, fragmented fossilized diatoms were recovered, but both the mean and the maximum fragment size decreased with increasing impact speed and hence
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Riding, Robert, Stanley M. Awramik, Barbara M. Winsborough, Karen M. Griffin, and Robert F. Dill. "Bahamian giant stromatolites: microbial composition of surface mats." Geological Magazine 128, no. 3 (1991): 227–34. http://dx.doi.org/10.1017/s001675680002207x.

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AbstractSubtidal columnar stromatolites up to 2.5 m high near Lee Stocking Island in the Exuma Cays, Bahamas, have surface mats approximately equally composed of algae and cyanobacteria. The stromatolites are composed of fine–medium oöid and peloid sand. This sediment is supplied to the growing stromatolite surfaces by strong tidal currents which lift grains into suspension and sweep migrating dunes over the columns. The algae include an unidentified filamentous chlorophyte, and numerous diatom species mostly belonging to Mastogloia, Nitzschia and Navicula. The dominant cyanobacteria are two o
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Glushchenko, Anton M., Yevhen I. Maltsev, John Patrick Kociolek, Irina V. Kuznetsova, and Maxim S. Kulikovskiy. "Molecular and Morphological Investigations of Two Giant Diatom Cymbella Species from the Transbaikal Area (Russia, Siberia) with Comments on Their Distributions." Plants 11, no. 18 (2022): 2445. http://dx.doi.org/10.3390/plants11182445.

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For the first time, a giant diatom species of the genus Cymbella from Lake Baikal was studied using molecular methods. Molecular and morphological investigations allowed to us to described one new species, Cymbella baicalaspera Glushchenko, Kulikovskiy and Kociolek sp. nov. This species is both morphologically similar and phylogenetically close to a second giant Cymbella species that we investigated here, identified by us as Cymbella himalaspera Jüttner and Van de Vijver in Jüttner et al. 2010. This species was first described from Nepal on the basis of a morphological investigation. Small mor
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Choi, Ah Yeong, Jong-Sik Ryu, Kiseong Hyeong, et al. "Silicon Isotope Measurement of Giant Diatoms Using MC-ICP-MS." Journal of the Korean earth science society 42, no. 1 (2021): 1–10. http://dx.doi.org/10.5467/jkess.2021.42.1.1.

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Deb, B., and G. Kurizki. "Formation of Giant Quasibound Cold Diatoms by Strong Atom-Cavity Coupling." Physical Review Letters 83, no. 4 (1999): 714–17. http://dx.doi.org/10.1103/physrevlett.83.714.

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Moravcová, Adéla, Ota Rauch, Jaromír Lukavský, and Linda Nedbalová. "The response of epilithic diatom assemblages to sewage pollution in mountain streams of the Czech Republic." Plant Ecology and Evolution 146, no. (2) (2013): 153–66. https://doi.org/10.5091/plecevo.2013.814.

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<b>Background and aim</b> – Mountain streams represent sensitive ecosystems of prime importance for biodiversity conservation. However, the knowledge of the impact of sewage pollution related to intensive recreational exploitation is still limited in these habitats. Our aim was to assess the response of stream diatom assemblages to sewage pollution in the Giant Mountains and the Bohemian Forest, and to find the main factors influencing the community structure. <b>Methods</b> – Epilithic samples from sixteen streams were collected, both in unaffected stream sections and at sites downstream of s
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Thienpont, Joshua R., Jennifer B. Korosi, Kathryn E. Hargan, et al. "Multi-trophic level response to extreme metal contamination from gold mining in a subarctic lake." Proceedings of the Royal Society B: Biological Sciences 283, no. 1836 (2016): 20161125. http://dx.doi.org/10.1098/rspb.2016.1125.

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Giant Mine, located in the city of Yellowknife (Northwest Territories, Canada), is a dramatic example of subarctic legacy contamination from mining activities, with remediation costs projected to exceed $1 billion. Operational between 1948 and 2004, gold extraction at Giant Mine released large quantities of arsenic and metals from the roasting of arsenopyrite ore. We examined the long-term ecological effects of roaster emissions on Pocket Lake, a small lake at the edge of the Giant Mine lease boundary, using a spectrum of palaeoenvironmental approaches. A dated sedimentary profile tracked stri
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Wilson, MR, JM Hush, and NA Walker. "The involvement of Microbial Epiphytes in Uptake Measurements with the Giant-celled Alga Chara australis." Functional Plant Biology 15, no. 4 (1988): 483. http://dx.doi.org/10.1071/pp9880483.

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The giant-celled algae Chara and Nitella have been used extensively in studies of the transport of ions and other solutes. Before this report, uptake measurements were made without a detailed consideration of the effects of microbial epiphytes living on the external surface of the algal cell wall. Examination of the cell walls of Chara and Nitella with the scanning electron microscope revealed the presence of an often dense microflora consisting of diatoms, many types of bacteria, and even fungi. The contribution of this microflora to uptake measurements made with radiotracers was estimated by
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Kemp, A. E. S., R. B. Pearce, I. Grigorov, et al. "Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans." Global Biogeochemical Cycles 20, no. 4 (2006): n/a. http://dx.doi.org/10.1029/2006gb002698.

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Xiong, Zhifang, Tiegang Li, Xavier Crosta, Thomas Algeo, Fengming Chang та Bin Zhai. "Potential role of giant marine diatoms in sequestration of atmospheric CO2 during the Last Glacial Maximum: δ13C evidence from laminated Ethmodiscus rex mats in tropical West Pacific". Global and Planetary Change 108 (вересень 2013): 1–14. http://dx.doi.org/10.1016/j.gloplacha.2013.06.003.

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Book chapters on the topic "Giant diatoms"

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Lefebvre-Brion, H. "Are the d→f shape Resonances in Diatomic Molecules ‘Giant Resonances’?" In Giant Resonances in Atoms, Molecules, and Solids. Springer US, 1987. http://dx.doi.org/10.1007/978-1-4899-2004-1_19.

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Conference papers on the topic "Giant diatoms"

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Patel, C. K. N. "Spectroscopy of solid hydrogen using optoacoustic techniques." In International Laser Science Conference. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.wh1.

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Optoacoustic spectroscopy has many advantages in the study of weakly absorbing gases, liquids, and solids. However, to date this capability has not been exploited for obtaining new spectroscopic information on interesting liquids and solids. In this paper I shall review the application of optoacoustic spectroscopy to cryogenic liquids and solids. Among the cryogenic liquid studies, overtone absorption spectra of liquid methane and ethane and those of solid hydrogens (H2, D2, and HD) are described in detail because of their importance to scientific understanding as well as to understanding of o
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