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Prochnow M, Strobel P, Bliedtner M, Struck J, Bittner L, Szidat S, Salazar G, Schneider H, Acharya S, Zech M, Zech R. Summer paleohydrology during the Late Glacial and Early Holocene based on δ 2H and δ 18O from Bichlersee, Bavaria. Sci Rep 2023; 13:18487. [PMID: 37898674 PMCID: PMC10613243 DOI: 10.1038/s41598-023-45754-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 10/23/2023] [Indexed: 10/30/2023] Open
Abstract
Isotope-based records provide valuable information on past climate changes. However, it is not always trivial to disentangle past changes in the isotopic composition of precipitation from possible changes in evaporative enrichment, and seasonality may need to be considered. Here, we analyzed δ2H on n-alkanes and δ18O on hemicellulose sugars in sediments from Bichlersee, Bavaria, covering the Late Glacial and Early Holocene. Our δ2Hn-C31 record documents past changes in the isotopic composition of summer precipitation and roughly shows the isotope pattern known from Greenland. Both records show lower values during the Younger Dryas, but at Bichlersee the signal is less pronounced, corroborating earlier suggestions that the Younger Dryas was mainly a winter phenomenon and less extreme during summer. δ18Ofucose records the isotopic composition of the lake water during summer and is sensitive to evaporative enrichment. Coupling δ2Hn-C31 and δ18Ofucose allows calculating lake water deuterium-excess and thus disentangling changes in the isotopic composition of precipitation and evaporative enrichment. Our deuterium-excess record reveals that the warm Bølling-Allerød and Early Holocene were characterized by more evaporative enrichment compared to the colder Younger Dryas. Site-specific hydrological conditions, seasonality, and coupling δ2H and δ18O are thus important when interpreting isotope records.
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Affiliation(s)
- Maximilian Prochnow
- Chair of Physical Geography, Institute of Geography, Friedrich-Schiller-Universität Jena, Jena, Germany.
| | - Paul Strobel
- Chair of Physical Geography, Institute of Geography, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Marcel Bliedtner
- Chair of Physical Geography, Institute of Geography, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Julian Struck
- Chair of Physical Geography, Institute of Geography, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Lucas Bittner
- Heisenberg Chair of Physical Geography with Focus on Paleoenvironmental Research, Institute of Geography, Technische Universität Dresden, Dresden, Germany
| | - Sönke Szidat
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
| | - Gary Salazar
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
| | - Heike Schneider
- Chair of Physical Geography, Institute of Geography, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Sudip Acharya
- Chair of Physical Geography, Institute of Geography, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Michael Zech
- Heisenberg Chair of Physical Geography with Focus on Paleoenvironmental Research, Institute of Geography, Technische Universität Dresden, Dresden, Germany
| | - Roland Zech
- Chair of Physical Geography, Institute of Geography, Friedrich-Schiller-Universität Jena, Jena, Germany
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Scherf L, Kretschmann J, Fischer M, Mielenz N, Möbius G, Getto S, Kaiser M, Müller H, Bittner L, Baumgartner W, Starke A. [Thermographic monitoring of skin surface temperature associated with hot-iron disbudding in calves]. SCHWEIZ ARCH TIERH 2020; 162:174-184. [PMID: 32146437 DOI: 10.17236/sat00251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The goal of this study was to determine the skin surface temperatures of the head using thermography in 28 German Holstein heifer calves at the time of hot iron disbudding. Calves were divided into group 1 (hot-iron disbudding, n = 14) and 2 (sham disbudding, n = 14). Thermographic measurements were made at eight locations of the head (area surrounding both horn buds, both horn buds, muzzle, mucous membranes of the muzzle, both eyes) at nine time points (- 60 min (basal value), time of disbudding, 5, 30, 60, 90, 120, 240 and 480 min after disbudding) using a high-end thermographic camera (ThermoPro TP8, Firma DIAS Infrared GmbH). The rectal temperature was measured 60 min before and 5, 240 and 480 min after disbudding. The statistical software SAS version 9.4 was used for analysis. Skin surface temperatures and rectal temperature correlated at several locations (rp ≥ 0.45; p ≤ 0.05). The maximum temperature (approx. 67 ºC) was measured at the horn buds immediately after the hot-iron procedure. By five and 30 min after hot-iron disbudding, the temperature of the horn buds had decreased by up to 50%, whereas the temperatures at the other locations had increased significantly (p.
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Affiliation(s)
- L Scherf
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - J Kretschmann
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - M Fischer
- Institut für Tierhygiene und Öffentliches Veterinärwesen der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - N Mielenz
- Institut für -Agrar- und Ernährungswissenschaften, Arbeitsgruppe Biometrie und Agrarinformatik, Martin-Luther-Universität, Halle-Wittenberg, 06120 Halle (Saale), Deutschland
| | - G Möbius
- Institut für Tierhygiene und Öffentliches Veterinärwesen der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - S Getto
- Fraunhofer-Institut für Produktionstechnik und -Automatisierung, 70569 Stuttgart, Deutschland
| | - M Kaiser
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - H Müller
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - L Bittner
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - W Baumgartner
- Universitätsklinik für Wiederkäuer, Veterinärmedizinische Universität Wien, 1210 Wien, Österreich
| | - A Starke
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
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Scherf L, Kretschmann J, Fischer M, Mielenz N, Möbius G, Getto S, Kaiser M, Müller H, Bittner L, Starke A. [Thermographic examination of head surface temperatures of calves under field conditions]. SCHWEIZ ARCH TIERH 2020; 161:649-658. [PMID: 31586927 DOI: 10.17236/sat00227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Thermographic examination of 157 German Holstein heifer calves was performed to investigate the feasibility of this technique for on-farm recording of surface temperature of the head and to examine potential factors that affect the recordings. Baseline values were obtained from six defined locations on the head including both eyes, both horn buds, the muzzle and the mucous membrane of the muzzle using a high-end thermographic camera (ThermoPro TP8, Firma DIAS Infrared GmbH). Evaluation of the influence of various factors on thermographic measurements showed that ambient temperature had the largest effect on surface temperature of the head (regression coefficient, 0.10 to 0.32, p ≤ 0.01) whereas humidity had no effect (in t-test p ≥ 0.33 over all locations). There was a no correlation between rectal temperature and surface temperature (rp ≤ 0.05). The surface temperature decreased with increasing age of the calves (regression coefficient, - 0.42 to - 0.14, p ≤ 0.01). The agreement between double readings made shortly after one another was excellent at all locations (r ≥ 0.95). The emission of infrared energy varied among different locations; the most infrared energy was emitted by the eyes and the least by the muzzle. Paired locations (eyes and horn buds) had symmetric emission patterns of infrared energy. Measuring the surface temperature of the head of calves in their normal barn environment using a standardised protocol was feasible and thus could potentially be used for monitoring calves under field conditions.
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Affiliation(s)
- L Scherf
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - J Kretschmann
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - M Fischer
- Institut für Tierhygiene und Öffentliches Veterinärwesen der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - N Mielenz
- Institut für -Agrar- und Ernährungswissenschaften, Arbeitsgruppe Biometrie und Agrarinformatik, Martin-Luther-Universität, Halle-Wittenberg, 06120 Halle (Saale), Deutschland
| | - G Möbius
- Institut für Tierhygiene und Öffentliches Veterinärwesen der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - S Getto
- Fraunhofer-Institut für Produktionstechnik und -Automatisierung, 70569 Stuttgart, Deutschland
| | - M Kaiser
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - H Müller
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - L Bittner
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
| | - A Starke
- Klinik für Klauentiere der Veterinärmedizinischen Fakultät der Universität Leipzig
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Gil-Romera G, Adolf C, Benito BM, Bittner L, Johansson MU, Grady DA, Lamb HF, Lemma B, Fekadu M, Glaser B, Mekonnen B, Sevilla-Callejo M, Zech M, Zech W, Miehe G. Long-term fire resilience of the Ericaceous Belt, Bale Mountains, Ethiopia. Biol Lett 2019; 15:20190357. [PMID: 31337290 DOI: 10.1098/rsbl.2019.0357] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Fire is the most frequent disturbance in the Ericaceous Belt (ca 3000-4300 m.a.s.l.), one of the most important plant communities of tropical African mountains. Through resprouting after fire, Erica establishes a positive fire feedback under certain burning regimes. However, present-day human activity in the Bale Mountains of Ethiopia includes fire and grazing systems that may have a negative impact on the resilience of the ericaceous ecosystem. Current knowledge of Erica-fire relationships is based on studies of modern vegetation, lacking a longer time perspective that can shed light on baseline conditions for the fire feedback. We hypothesize that fire has influenced Erica communities in the Bale Mountains at millennial time-scales. To test this, we (1) identify the fire history of the Bale Mountains through a pollen and charcoal record from Garba Guracha, a lake at 3950 m.a.s.l., and (2) describe the long-term bidirectional feedback between wildfire and Erica, which may control the ecosystem's resilience. Our results support fire occurrence in the area since ca 14 000 years ago, with particularly intense burning during the early Holocene, 10.8-6.0 cal ka BP. We show that a positive feedback between Erica abundance and fire occurrence was in operation throughout the Lateglacial and Holocene, and interpret the Ericaceous Belt of the Ethiopian mountains as a long-term fire resilient ecosystem. We propose that controlled burning should be an integral part of landscape management in the Bale Mountains National Park.
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Affiliation(s)
- Graciela Gil-Romera
- Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, UK.,Pyrenean Institute of Ecology IPE-CSIC, Zaragoza, Spain.,Department of Geography, Phillips Marburg University, Marburg, Germany
| | - Carole Adolf
- Long-Term Ecology Laboratory, Department of Zoology, University of Oxford, Oxford, UK
| | - Blas M Benito
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - Lucas Bittner
- Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Maria U Johansson
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - David A Grady
- Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, UK
| | - Henry F Lamb
- Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, UK
| | - Bruk Lemma
- Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Mekbib Fekadu
- Department of Geography, Phillips Marburg University, Marburg, Germany.,Department of Plant Biology and Biodiversity Management, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Bruno Glaser
- Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Betelhem Mekonnen
- Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Miguel Sevilla-Callejo
- Pyrenean Institute of Ecology IPE-CSIC, Zaragoza, Spain.,Department of Geography and Land Management, University of Zaragoza, Zaragoza, Spain
| | - Michael Zech
- Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.,Institute of Geography, TU Dresden, Dresden, Germany
| | - Wolfgang Zech
- Institute of Soil Science and Soil Geography, University of Bayreuth, Bayreuth, Germany
| | - Georg Miehe
- Department of Geography, Phillips Marburg University, Marburg, Germany
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Bittner L, Zamecnik L, Valka R, Bettocchi C. HP-08-004 Kinesiology taping of scrotum- an update of "Mummy wrap". J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.03.155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bittner L, Wyck S, Herrera C, Siuda M, Wrenzycki C, van Loon B, Bollwein H. Negative effects of oxidative stress in bovine spermatozoa on in vitro development and DNA integrity of embryos. Reprod Fertil Dev 2018; 30:1359-1368. [DOI: 10.1071/rd17533] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 03/22/2018] [Indexed: 11/23/2022] Open
Abstract
Oxidative stress in spermatozoa has effects on subsequent embryo development. The aim of the present study was to elucidate whether sperm oxidative stress results in increased DNA damage in the embryo. To this end, bovine spermatozoa were incubated for 1 h at 37°C without or with 100 µM H2O2, resulting in non-oxidised (NOX-S) and oxidised (OX-S) spermatozoa respectively. Non-incubated spermatozoa served as the control group (CON-S). After IVF, developmental rates 30, 46 and 60 h and 7 days after IVF were assessed. DNA damage was analysed in embryos using the comet assay and a DNA damage marker (γH2AX immunostaining); the apoptotic index was determined in blastocysts. Exposure of spermatozoa to H2O2 induced a significant amount of sperm chromatin damage. The use of OX-S in IVF resulted in significantly reduced cleavage and blastocyst rates compared with the use of CON-S and NOX-S. Furthermore, in embryos resulting from the use of OX-S, a developmental delay was evident 30 and 46 h after IVF. γH2AX immunostaining was lower in blastocysts than in early embryos. In blastocysts, the comet and apoptotic indices were significantly higher in embryos resulting from the use of OX-S than CON-S and NOX-S. In conclusion, oxidative stress in spermatozoa induces developmental abnormalities and is a source of DNA damage in the resulting embryos.
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Motovska Z, Jarkovsky J, Ondrakova M, Knot J, Havluj L, Bartoska R, Bittner L, Gurlich R, Dzupa V, Grill R, Widimsky P. P5337Predictors and case fatality rate of perioperative major cardiovascular events in cardiac patients undergoing non-cardiac surgery. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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de Vargas C, Audic S, Henry N, Decelle J, Mahe F, Logares R, Lara E, Berney C, Le Bescot N, Probert I, Carmichael M, Poulain J, Romac S, Colin S, Aury JM, Bittner L, Chaffron S, Dunthorn M, Engelen S, Flegontova O, Guidi L, Horak A, Jaillon O, Lima-Mendez G, Luke J, Malviya S, Morard R, Mulot M, Scalco E, Siano R, Vincent F, Zingone A, Dimier C, Picheral M, Searson S, Kandels-Lewis S, Acinas SG, Bork P, Bowler C, Gorsky G, Grimsley N, Hingamp P, Iudicone D, Not F, Ogata H, Pesant S, Raes J, Sieracki ME, Speich S, Stemmann L, Sunagawa S, Weissenbach J, Wincker P, Karsenti E, Boss E, Follows M, Karp-Boss L, Krzic U, Reynaud EG, Sardet C, Sullivan MB, Velayoudon D. Eukaryotic plankton diversity in the sunlit ocean. Science 2015; 348:1261605. [DOI: 10.1126/science.1261605] [Citation(s) in RCA: 1138] [Impact Index Per Article: 126.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Saeed A, W. Huck C, Pallua J, A. Huck-Pezzei V, Bittner L, Pezzei C, Schonbichler S, M. Qureshi A, K. Bonn G, Najam-ul-Haq M. Role of Infrared Spectroscopy in Proteomics and Subsequently the Biomarker Analysis. CURR PROTEOMICS 2012. [DOI: 10.2174/157016412800786239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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P. Guo L, Q. Huang L, P. Zhang X, Bittner L, Pezzei C, Pallua J, Schonbichler S, A. Huck-Pezzei V, K. Bonn G, W. Huck C. Application of Near-Infrared Spectroscopy (NIRS) as a Tool for Quality Control in Traditional Chinese Medicine (TCM). ACTA ACUST UNITED AC 2011. [DOI: 10.2174/157340711796011188] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Olivier CY, Lowery DT, Stobbs LW, Vincent C, Galka B, Saguez J, Bittner L, Johnson R, Rott M, Masters C, Green M. First Report of Aster Yellow Phytoplasmas ('Candidatus Phytoplasma asteris') in Canadian Grapevines. Plant Dis 2009; 93:669. [PMID: 30764410 DOI: 10.1094/pdis-93-6-0669a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In North America, elm yellows, aster yellows (AY), and X-disease phytoplasmas have been detected in American grapevines (1), and recently, Bois noir was detected in Canadian vineyards from British Columbia (BC) and Ontario (ON) (2). Typical symptoms of grapevine yellows (GY) include leaf rolling and chlorosis, uneven or total lack of lignification of canes, flower abortion or berry withering, and stunting. In 2006 and 2007, independent surveys were conducted by the Canadian Food Inspection Agency (CFIA) and Agriculture and Agri-Food Canada (AAFC) to detect phytoplasmas in Canadian vineyards containing different cultivars in BC, ON, Québec (QC), Nova Scotia, New Brunswick, and Prince Edward Island. The CFIA collected and tested 651 fresh leaf samples from recently imported grapevines and older grapevines in the same or neighboring blocks displaying symptoms typical of those associated with disease caused by phytoplasmas. Many vineyards were surveyed only once. AAFC collected and tested 3,485 samples from symptomatic and asymptomatic grapevines from established vineyards in ON, BC, and QC. The same vineyards were sampled in ON and BC both years; QC vineyards were only sampled in 2007. AAFC-collected leaf samples were freeze dried and stored at -20°C before processing. CFIA samples were tested by a modified real-time PCR assay and TaqMan probe targeting the 16S ribosomal RNA gene that detects a wide range of known phytoplasmas (2). Positive samples were confirmed by conventional PCR using the phytoplasma-specific primers P1/P7 (3) and the resulting ~1,800-bp fragment was cloned and sequenced as previously described (2). DNA extracted by AAFC was amplified by nested PCR technology with universal phytoplasma specific primer pairs P1/P6 and R16R2/R16F2 (3) and the resulting 1,200-bp fragment was cloned and sequenced. Two plants, one located in ON in 2006 and the other in BC in 2007, were found to be infected with an AY-like phytoplasma by the CFIA. The phytoplasmas detected in both infected plants had a 99.9% nt sequence identity with AY phytoplasma sequences from GenBank (Accession Nos. AF222063 and AY665676, respectively), with the BC isolate also showing 100% identity to a strain of AY, ash witches'-broom phytoplasma (GenBank Accession No. AY566302). AAFC detected phytoplasma DNA in both years in a total of 17 symptomatic plants and 21 asymptomatic plants from different vine varieties in ON, BC, and QC. Positive samples were found to have a 99.0% nt sequence identity to AY subgroup 16SrI-A (GenBank Accession No. AY180956). Sequences were exchanged for confirmation of phytoplasma identity and were deposited in Genbank under Accession Nos. FJ659844 and FJ824597. Phytoplasma strains were identified for all plants in which phytoplasmas were detected. Results show that AY is present in vineyards in the provinces of ON, BC, and QC. To our knowledge, this is the first report of AY being detected in grapevines in Canada. References: (1) E. Boudon-Padieu. Bull. O I V, 79:299, 2003. (2) M. Rott et al. Plant Dis. 91:1682, 2007. (3) E. Tanne et al. Phytopathology 91:741, 2001.
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Affiliation(s)
- C Y Olivier
- Agriculture and AgriFood Canada, Saskatoon, SK, Canada
| | - D T Lowery
- Agriculture and AgriFood Canada, Summerland BC
| | - L W Stobbs
- Agriculture and AgriFood Canada, Vineland ON
| | - C Vincent
- Agriculture and Agroalimentaire Canada, St-Jean-sur-Richelieu, QC, Canada
| | - B Galka
- Agriculture and AgriFood Canada, Saskatoon SK
| | - J Saguez
- Agriculture and Agroalimentaire Canada, St-Jean-sur-Richelieu QC
| | - L Bittner
- Agriculture and AgriFood Canada, Vineland ON
| | - R Johnson
- Canadian Food Inspection Agency, Centre for Plant Health, Sidney Laboratory, Sidney, BC, Canada
| | - M Rott
- Canadian Food Inspection Agency, Centre for Plant Health, Sidney Laboratory, Sidney, BC, Canada
| | - C Masters
- Canadian Food Inspection Agency, Centre for Plant Health, Sidney Laboratory, Sidney, BC, Canada
| | - M Green
- Canadian Food Inspection Agency, Centre for Plant Health, Sidney Laboratory, Sidney, BC, Canada
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Bittner L, Payri CE, Couloux A, Cruaud C, de Reviers B, Rousseau F. Molecular phylogeny of the Dictyotales and their position within the Phaeophyceae, based on nuclear, plastid and mitochondrial DNA sequence data. Mol Phylogenet Evol 2008; 49:211-26. [PMID: 18652904 DOI: 10.1016/j.ympev.2008.06.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2008] [Revised: 06/25/2008] [Accepted: 06/25/2008] [Indexed: 11/29/2022]
Abstract
For the first time, on the basis of nuclear, plastid and mitochondrial sequence data, the most comprehensive molecular phylogeny of the Dictyotales to date is presented, in a broad context where all brown algal orders are included (except Discosporangiales, Ascoseirales and Nemodermatales). A veto supertree approach was used here to evaluate congruency and conflicts between genes: phylogenetic signal was congruent and mainly carried by chloroplastic information. Supermatrix analyses (BI, ML and MP) revealed that Dictyotales is sister to Onslowiales, this ensemble being sister of a clade also encompassing Sphacelariales and Syringodermatales. The family Scoresbyellaceae is merged into the family Dictyotaceae. Furthermore, the current subdivision of the Dictyotaceae into two tribes was not supported. The enigmatic genus Stoechospermum was shown to belong to the same clade as Dictyota, Rugulopteryx, Scoresbyella and Canistrocarpus. Homoeostrichus and Dictyopteris did not appear monophyletic. Zonaria stipitata clustered with the Spatoglossum species; since this is consistent with its morphological features, the new combination Spatoglossum stipitatum is proposed accordingly.
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Affiliation(s)
- L Bittner
- UMR 7138 (UPMC, MNHN, CNRS, IRD), Systématique, adaptation, évolution, Muséum national d'histoire naturelle, 57, rue Cuvier, CP 39, 75231 Paris cedex 05, France.
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Hoxhaj S, DiSabatino A, Bittner L, Fisher A, Carroll J, Reese C, O'Connor R. Using Non-Interventional Cardiologists As First Call Does Not Affect the Door-to-Balloon Time or Decision to Use Angioplasty for AMI Patients Presenting to the Emergency Department. Ann Emerg Med 2005. [DOI: 10.1016/j.annemergmed.2005.06.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wabnitz H, Bittner L, de Castro ARB, Döhrmann R, Gürtler P, Laarmann T, Laasch W, Schulz J, Swiderski A, von Haeften K, Möller T, Faatz B, Fateev A, Feldhaus J, Gerth C, Hahn U, Saldin E, Schneidmiller E, Sytchev K, Tiedtke K, Treusch R, Yurkov M. Multiple ionization of atom clusters by intense soft X-rays from a free-electron laser. Nature 2002; 420:482-5. [PMID: 12466837 DOI: 10.1038/nature01197] [Citation(s) in RCA: 400] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2002] [Accepted: 10/07/2002] [Indexed: 11/08/2022]
Abstract
Intense radiation from lasers has opened up many new areas of research in physics and chemistry, and has revolutionized optical technology. So far, most work in the field of nonlinear processes has been restricted to infrared, visible and ultraviolet light, although progress in the development of X-ray lasers has been made recently. With the advent of a free-electron laser in the soft-X-ray regime below 100 nm wavelength, a new light source is now available for experiments with intense, short-wavelength radiation that could be used to obtain deeper insights into the structure of matter. Other free-electron sources with even shorter wavelengths are planned for the future. Here we present initial results from a study of the interaction of soft X-ray radiation, generated by a free-electron laser, with Xe atoms and clusters. We find that, whereas Xe atoms become only singly ionized by the absorption of single photons, absorption in clusters is strongly enhanced. On average, each atom in large clusters absorbs up to 400 eV, corresponding to 30 photons. We suggest that the clusters are heated up and electrons are emitted after acquiring sufficient energy. The clusters finally disintegrate completely by Coulomb explosion.
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Affiliation(s)
- H Wabnitz
- Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22603 Hamburg, Germany
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Selby JB, Tegtmeyer CJ, Amodeo C, Bittner L, Atuk NO. Insertion of subclavian hemodialysis catheters in difficult cases: value of fluoroscopy and angiographic techniques. AJR Am J Roentgenol 1989; 152:641-3. [PMID: 2783817 DOI: 10.2214/ajr.152.3.641] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Double-lumen hemodialysis catheters designed to be placed via a subclavian vein approach have gained rapid acceptance over the past several years. Several studies have shown a significant rate of subclavian vein stenosis or occlusion after placement of these catheters. A large number of these patients require repeat placement of catheters with access often becoming increasingly difficult to obtain. Over the past 5 years, we have been asked to place 38 catheters in 34 patients that could not be placed at the bedside. Our procedure consists of obtaining a preliminary venogram to evaluate the reason for difficulty. The subclavian vein is then cannulated under direct fluoroscopic visualization while the peripheral venous line is injected with contrast material. Percutaneous angiographic techniques are then used to position the catheter. Satisfactory placement was obtained in all 38 cases. There were no complications, which is surprising considering the number of complications seen with the standard methods of insertion. This represents a new role for the interventional radiologist, one that can be important in minimizing the number of new dialysis sites in any one patient.
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Affiliation(s)
- J B Selby
- Department of Radiology, University of Virginia Medical Center, Charlottesville 22908
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Abstract
The secretory and motor function of the stomach and gastrin incretion were investigated in 68 patients with peptic ulcer of variable localization. In addition, a retrospective analysis of the course of prepyloric gastric ulcer and Billroth I resection was performed in 62 patients. Results show that gastric acid secretion and velocity of gastric emptying diminish significantly with increasing height of the localization of the ulcer. Prepyloric gastric ulcer cannot be likened to the duodenal ulcer. Moreover, experimental and clinical results suggest that prepyloric ulcer represents a disease entity per se requiring separate therapeutic approaches (gastric resection following Billroth I).
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Bittner L, Beger HG, Meves M, Bittner R. [Proceedings: Gastric motility, serum gastrin and gastric secretion in duodenal ulcer patients]. Z Gastroenterol 1976; 14 Suppl:243-4. [PMID: 960934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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