633 research outputs found
Vishniacozyma psychrotolerans Yurkov 2020, sp. nov.
No full text<p> <i>Vishniacozyma psychrotolerans</i> V. de García, Zalar, Brizzio, Gunde-Cim. & Van Broock ex Yurkov, <i>sp. nov.</i> MycoBank MB831684.</p> <p>For description see FEMS Microbiology Ecology 82(2): 535 (2012).</p> <p> <i>Holotype:</i> EXF-7039 (preserved in a metabolically inactive state).</p> <p> <i>Synonyms</i>: <i>Cryptococcus psychrotolerans</i> V. de García, Zalar, Brizzio, Gunde-Cim. & Van Broock, FEMS Microbiol. Ecol. 82(2): 535 (2012), <i>nom. inval.</i>, Art. 40.7 (Shenzhen).</p> <p> = <i>Vishniacozyma psychrotolerans</i> V. de García, Zalar, Brizzio, Gunde-Cim. & Van Broock ex Yurkov,Stud.Mycol. 81: 124 (2015), <i>nom. inval.</i>, Art. 40.7 (Shenzhen).</p>Published as part of <i>Li, A. - H., Yuan, F. - X., Groenewald, M., Bensch, K., Yurkov, A. M., Li, K., Han, P. - J., Guo, L. - D., Aime, M. C., Sampaio, J. P., Jindamorakot, S., Turchetti, B., Inacio, J., Fungsin, B., Wang, Q. - M. & Bai, F. - Y., 2020, Diversity and phylogeny of basidiomycetous yeasts from plant leaves and soil: Proposal of two new orders, three new families, eight new genera and one hundred and seven new species, pp. 17-140 in Studies In Mycology 96</i> on pages 137-138, DOI: 10.1016/j.simyco.2020.01.002, <a href="http://zenodo.org/record/10497182">http://zenodo.org/record/10497182</a>
Papiliotrema frias Yurkov 2020, sp. nov.
No full text<p> <i>Papiliotrema frias</i> V. de García, Zalar, Brizzio, Gunde-Cim. & van Broock ex Yurkov, <i>sp. nov.</i> MycoBank MB831685.</p> <p>For description see FEMS Microbiology Ecology 82(2): 537 (2012).</p> <p> <i>Holotype:</i> EXF-5992 (preserved in a metabolically inactive state).</p> <p> <i>Synonyms</i>: <i>Cryptococcus frias</i> V. de García <i>et al.</i>, FEMS Microbiol. Ecol. 82(2): 537 (2012), <i>nom. inval.</i>, Art. 40.7 (Shenzhen).</p> <p> = <i>Papiliotrema frias</i> V. de García, Zalar, Brizzio, Gunde-Cim. & van Broock ex Yurkov, Stud. Mycol. 81: 126 (2015), <i>nom. inval.</i>, Art. 40.7 (Shenzhen).</p>Published as part of <i>Li, A. - H., Yuan, F. - X., Groenewald, M., Bensch, K., Yurkov, A. M., Li, K., Han, P. - J., Guo, L. - D., Aime, M. C., Sampaio, J. P., Jindamorakot, S., Turchetti, B., Inacio, J., Fungsin, B., Wang, Q. - M. & Bai, F. - Y., 2020, Diversity and phylogeny of basidiomycetous yeasts from plant leaves and soil: Proposal of two new orders, three new families, eight new genera and one hundred and seven new species, pp. 17-140 in Studies In Mycology 96</i> on page 135, DOI: 10.1016/j.simyco.2020.01.002, <a href="http://zenodo.org/record/10497182">http://zenodo.org/record/10497182</a>
Rare and undersampled dimorphic basidiomycetes
No full textThe diversity of yeasts has grown rapidly as the discovery of new species has benefited from intensified sampling and largely improved identification techniques. An environmental study typically reports the isolation of yeast species, some of which are new to science. Rare species represented by a few isolates often do not result in a taxonomic description. Nucleic acid sequences from these undescribed yeasts remain in public sequence databases, often without a proper taxonomic placement. This study presents a constrained phylogenetic analysis for many rare yeasts from unpublished but publicly available DNA sequences and from studies previously conducted by the authors of this work. We demonstrate that single isolates are an important source of taxonomic findings such as including new genera and species. Independent surveys performed during the last 20 years on a large geographic scale yielded a number of single strains, which were proved to be conspecific in the phylogenetic analyses presented here. The following new species were resolved and described: Vustinia terrea Kachalkin, Turchetti & Yurkov gen. nov. et sp. nov.; Udeniomyces caspiensis Kachalkin sp. nov.; Udeniomyces orazovii Kachalkin sp. nov.; Tausonia rosea Kachalkin sp. nov.; Itersonilia diksonensis Kachalkin sp. nov.; Krasilnikovozyma fibulata Glushakova & Kachalkin, Kwoniella fici Turchetti sp. nov.; Heterocephalacria fruticeti f.a. Carvalho, Roehl, Yurkov & Sampaio sp. nov.; Heterocephalacria gelida f.a. Turchetti & Kachalkin sp. nov.; Heterocephalacria hypogea f.a. Carvalho, Roehl, Yurkov & Sampaio sp. nov.; Heterocephalacria lusitanica f.a. Inacio, Carvalho, Roehl, Yurkov & Sampaio sp. nov.; Piskurozyma arborea Yurkov, Kachalkin, Mašínová & Baldrian sp. nov.; Piskurozyma silvicultrix Turchetti, Mašínová, Baldrian & Yurkov sp. nov.; Piskurozyma stramentorum Yurkov, Mašínová & Baldrian sp. nov.; Naganishia nivalis Turchetti sp. nov.; and Yurkovia nerthusi Yurkov & Begerow, sp. nov. In addition, two new combinations were proposed Krasilnikovozyma curviuscula (Babeva, Lisichkina, Reshetova & Danilevich) Yurkov, Kachalkin & Sampaio comb. nov. and Hannaella taiwanensis (F.L. Lee & C.H. Huang) Yurkov comb. nov. The order Cyphobasidiales T. Spribille & H. Mayrhofer is rejected in favor of the older name Erythrobasidiales R. Bauer, Begerow, J.P. Sampaio, M. Weiss & Oberwinkler. Other potential novel species identified in this paper await future description. Phylogenetic placement of yet unpublished sequences is believed to facilitate species descriptions and improve classification of yeasts from environmental sequence libraries
Design considerations and analysis of potential applications of a high power ultraviolet FEL at the TESLA test facility at DESY
No full textA possibility of constructing a high power ultraviolet free electron laser at the TESLA test facility at DESY is discussed. The proposed facility consists of a tunable master oscillator (Pavnot, vert, similar10 mW, Ppeaknot, vert, similar10 kW, λsimilar, equals200–350 nm) and an FEL amplifier with a tapered undulator. The average and peak radiation power at the exit of the FEL amplifier is about 7 kW and 220 GW, respectively. Installation of such a facility can significantly extend scientific potential of the TESLA test facility. The UV free electron laser can be used to construct a polarized, monochromatic gamma-source with the ultimate yield up to 1012 gamma-quanta per second and the maximal energy of about 100 MeV. An intensive gamma-source can also form the base for constructing the test facility for the TESLA positron generation system. Another accelerator application of the proposed facility is verification of the main technical solutions for the laser and the optical system to be used in the gamma–gamma option of the TESLA collider. A high average power UV laser is also promising for industrial applications
Tellurite-dependent blackening of bacteria emerges from the dark ages
No full textThe timeline of tellurite prokaryotic biology and biochemistry is now over 50 years long. Its start was in the clinical microbiology arena up to the 1970s. The 1980s saw the cloning of tellurite resistance determinants while from the 1990s through to the present, new strains were isolated and research into resistance mechanisms and biochemistry took place. The past 10 years have seen rising interest in more technological developments and considerable advancement in the understanding of the biochemical mechanisms of tellurite metabolism and biochemistry in several different prokaryotes. This research work has provided a list of genes and proteins and ideas about the fundamental metabolism of Te oxyanions. Yet the biomolecular mechanisms of the tellurite resistance determinants are far from established. Regardless, we have begun to see a new direction of Te biology beyond the clinical pathogen screening approaches, evolving into the biotechnology fields of bioremediation, bioconversion and bionanotechnologies and subsequent technovations. Knowledge on Te biology may still be lagging behind that of other chemical elements, but has moved beyond its dark ages and is now well into its renaissance
Sandaracinobacter Yurkov, Stackebrandt, Buss, Vermeglio, Gorlenko and Beatty 1997, 1177 VP
No full textDesign considerations of 10-kW-scale extreme ultraviolet SASE FEL for lithography
No full textThe semiconductor industry growth is driven to a large extent by steady advancements in microlithography. According to the newly updated industry roadmap, the 70 nm generation is anticipated to be available in the year 2008. However, the path to get there is not obvious. The problem of construction of Extreme Ultraviolet (EUV) quantum laser for lithography is still unsolved: progress in this field is rather moderate and we cannot expect a significant break through in the near future. Nevertheless, there is clear path for optical lithography to take us to sub- 100 nm dimensions. Theoretical and experimental work in free electron laser (FEL) and accelerator physics and technology over the last 10 years has pointed to the possibility of generation of high-power optical beams with laser-like characteristics in the EUV spectral range. Recently, there have been important advances in demonstrating a high-gain self-amplified spontaneous emission (SASE) FEL at 100 nm wavelength (Andruszkov et al., Phys. Rev. Lett. 85 (2000), 3825). In the SASE FEL powerful, coherent radiation is produced by the electron beam during single-pass of the undulator, thus there are no apparent limitations which would prevent operation at very short wavelength range and to increase the average output power of this device up to 10 kW level. The use of superconducting energy-recovery linac could produce a major, cost-effective facility with wall plug power to output optical power efficiency of about 1%. A 10-kW-scale transversely coherent radiation source with narrow bandwidth (0.5%) and variable wavelength could be an excellent tool for manufacturing computer chips with the minimum feature size below 100 nm . All components of the proposed SASE FEL equipment (injector, driver accelerator structure, energy-recovery system, undulator, etc.) have been demonstrated in practice. This is guaranteed success in the time schedule requirement
Roseococcus Yurkov, Stackebrandt, Holmes, Fuerst, Hugenholtz, Golecki, Gad’on, Gorlenko, Kompantseva and Drews 1994c, 430 VP
No full textErythromicrobium Yurkov, Stackebrandt, Holmes, Fuerst, Hugenholtz, Golecki, Gad’on, Gorlenko, Kompantseva and Drews 1994c, 432 VP
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