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  1. Article ; Online: First record of the crab spider Epicadus camelinus (O. Pickard-Cambridge, 1869) in Peru (Araneae, Thomisidae, Stephanopinae)

    Tobias Bauer

    Check List, Vol 16, Iss 6, Pp 1551-

    2020  Volume 1555

    Abstract: The first record of the crab spider Epicadus camelinus (O. Pickard-Cambridge, 1869) from Peru is presented. A single female specimen was collected in the Área de Conservación Privada Panguana in 1984 and deposited in the State Museum of Natural History ... ...

    Abstract The first record of the crab spider Epicadus camelinus (O. Pickard-Cambridge, 1869) from Peru is presented. A single female specimen was collected in the Área de Conservación Privada Panguana in 1984 and deposited in the State Museum of Natural History Karlsruhe, Germany. The record represents a considerable range extension of approximately 800 km west of the closest known locality of the species in Brazil. The specimen and the corresponding diagnostic characters are illustrated in detail.
    Keywords Biodiversity ; distribution ; flower ; Neotropics ; po ; Biology (General) ; QH301-705.5
    Language English
    Publishing date 2020-11-01T00:00:00Z
    Publisher Pensoft Publishers
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Circumstances Leading To Finding Out about Being Donor-Conceived and Its Perceived Impact on Family Relationships

    Tobias Bauer / Anne Meier-Credner

    Social Sciences, Vol 12, Iss 155, p

    A Survey of Adults Conceived via Anonymous Donor Insemination in Germany

    2023  Volume 155

    Abstract: Recent empirical research on the psychosocial implications of donor insemination is increasingly based on data directly obtained from donor-conceived persons. This descriptive study on donor-conceived adults in Germany inquires into their experience of ... ...

    Abstract Recent empirical research on the psychosocial implications of donor insemination is increasingly based on data directly obtained from donor-conceived persons. This descriptive study on donor-conceived adults in Germany inquires into their experience of finding out about being donor-conceived and answers the following research question: how do German adults conceived via anonymous donor insemination find out about the means of their conception and how do they experience family relationships post finding out? An online self-administered questionnaire targeting German donor-conceived adults to obtain qualitative and quantitative data was administered between September and November 2020. Fifty-nine donor-conceived adults were recruited via the support and advocacy group Verein Spenderkinder . Participants had been born in heterosexual-couple-parented families, were between 21 and 46 years old, and found out about the circumstances of their conception between 5 and 46 years of age. A broad spectrum of contexts and circumstances in which participants learned about being donor-conceived were reported, such as discovery via medical records, through disclosure as a result of parental consideration of the child’s current life situation or through direct-to-consumer DNA testing. Finding out about the means of their conception was experienced by participants as affecting their relationships with their family members to different degrees and in various ways. This first systematic inquiry into German donor-conceived adults’ experiences expands the literature and provides basic data for further research. Direct-to-consumer DNA testing is identified as one emerging trigger for finding out, warranting future research. The heuristic value of further in-depth inquiry into donor-conceived adults’ relationship with family members other than their parents, in particular their siblings, is highlighted.
    Keywords sperm donation ; donor-conceived adults ; disclosure ; family relationships ; Germany ; Social Sciences ; H
    Subject code 360 ; 300
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: La Araña toro, Macrothele calpeiana, repeatedly imported to Germany (Araneae

    Tobias Bauer / Ingo Wendt

    Fragmenta entomologica, Vol 54, Iss

    Macrothelidae)

    2022  Volume 1

    Abstract: Macrothele calpeiana (Walckenaer, 1805) is one the largest and most noticeable spiders that frequently “hitchhikes” with ornamental plants, a major vector for alien species, to areas outside its natural distribution. Two further imports of this species ... ...

    Abstract Macrothele calpeiana (Walckenaer, 1805) is one the largest and most noticeable spiders that frequently “hitchhikes” with ornamental plants, a major vector for alien species, to areas outside its natural distribution. Two further imports of this species are presented herein, which were both found in Germany (Central Europe). While one specimen has been imported with an olive tree, the other spider was found in a potted citrus tree from Andalusia. The olive tree supposedly originates from Crete, for which no records of M. calpeiana are currently known. Both records probably represent only a small percentage of the specimens recently introduced To Germany (and Central Europe) by ornamental tree trade, as several postings on online spider boards and press articles suggest.
    Keywords alien ; Iberian Peninsula ; invasive species ; olive ; spider ; vector ; Zoology ; QL1-991
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher University La Sapienza of Rome
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Xysticus grallator Simon, 1932 new to mainland Italy (Araneae, Thomisidae)

    Tobias Bauer / Raffaele Falato / Paolo Pantini

    Check List, Vol 19, Iss 5, Pp 713-

    2023  Volume 718

    Abstract: Xysticus grallator Simon, 1932 is a little-known species of crab spider distributed in the western Mediterranean region. We present new records of this species from mainland Italy, together with images of living and preserved specimens, the copulatory ... ...

    Abstract Xysticus grallator Simon, 1932 is a little-known species of crab spider distributed in the western Mediterranean region. We present new records of this species from mainland Italy, together with images of living and preserved specimens, the copulatory organs, and the habitat. A map of literature records provides insights into the known distribution of this species. Additionally, we show that a historical record of Xysticus pavesii O. Pickard- Cambridge, 1873 by L. di Caporiacco is misidentified and in fact the first record of X. grallator on the Italian Peninsula.
    Keywords Check list ; crab spider ; Iberian Peninsula ; monito ; Biology (General) ; QH301-705.5
    Language English
    Publishing date 2023-10-01T00:00:00Z
    Publisher Pensoft Publishers
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Rediscovery of the extremely rare running crab spider Philodromus (Artanes) poecilus (Thorell, 1872) in Bavaria, Germany, after 141 years (Araneae, Philodromidae)

    Tobias Bauer / Hans-Jürgen Thorns / Jürgen Guttenberger

    Check List, Vol 18, Iss 3, Pp 583-

    2022  Volume 591

    Abstract: Philodromus poecilus (Thorell, 1872) is a Transeurasian species reported from most parts of Europe except the British Isles and the Iberian Peninsula. Although widely distributed, this species is extremely rarely recorded in Germany and neighbouring ... ...

    Abstract Philodromus poecilus (Thorell, 1872) is a Transeurasian species reported from most parts of Europe except the British Isles and the Iberian Peninsula. Although widely distributed, this species is extremely rarely recorded in Germany and neighbouring countries. In Bavaria, it has not been found since the time of Ludwig Koch (1825–1908). Recently, sev-eral specimens were collected from urban plane trees in Deggendorf (Lower Bavaria), proving that the species is still present in Bavaria. Additionally, images of the copulatory organs and of living and preserved specimens are presented, as is a compilation of records in Germany and neighbouring countries.
    Keywords Biodiversity ; cursorial ; monitoring ; rare species ; Biology (General) ; QH301-705.5
    Language English
    Publishing date 2022-06-01T00:00:00Z
    Publisher Pensoft Publishers
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Telecom quantum photonic interface for a 40Ca+ single-ion quantum memory

    Elena Arenskötter / Tobias Bauer / Stephan Kucera / Matthias Bock / Jürgen Eschner / Christoph Becher

    npj Quantum Information, Vol 9, Iss 1, Pp 1-

    2023  Volume 8

    Abstract: Abstract Entanglement-based quantum networks require quantum photonic interfaces between stationary quantum memories and photons, enabling entanglement distribution. Here we present such a photonic interface, designed for connecting a 40Ca+ single-ion ... ...

    Abstract Abstract Entanglement-based quantum networks require quantum photonic interfaces between stationary quantum memories and photons, enabling entanglement distribution. Here we present such a photonic interface, designed for connecting a 40Ca+ single-ion quantum memory to the telecom C-band. The interface combines a memory-resonant, cavity-enhanced spontaneous parametric down-conversion photon pair source with bi-directional polarization-conserving quantum frequency conversion. We demonstrate preservation of high-fidelity entanglement during conversion, fiber transmission over up to 40 km and back-conversion to the memory wavelength. Even for the longest distance and bi-directional conversion the entanglement fidelity remains larger than 95% (98%) without (with) background correction.
    Keywords Physics ; QC1-999 ; Electronic computers. Computer science ; QA75.5-76.95
    Language English
    Publishing date 2023-04-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Fundus autofluorescence imaging using red excitation light

    Johannes Birtel / Tobias Bauer / Laurenz Pauleikhoff / Theodor Rüber / Martin Gliem / Peter Charbel Issa

    Scientific Reports, Vol 13, Iss 1, Pp 1-

    2023  Volume 9

    Abstract: Abstract Retinal disease accounts significantly for visual impairment and blindness. An important role in the pathophysiology of retinal disease and aging is attributed to lipofuscin, a complex of fluorescent metabolites. Fundus autofluorescence (AF) ... ...

    Abstract Abstract Retinal disease accounts significantly for visual impairment and blindness. An important role in the pathophysiology of retinal disease and aging is attributed to lipofuscin, a complex of fluorescent metabolites. Fundus autofluorescence (AF) imaging allows non-invasive mapping of lipofuscin and is a key technology to diagnose and monitor retinal disease. However, currently used short-wavelength (SW) excitation light has several limitations, including glare and discomfort during image acquisition, reduced image quality in case of lens opacities, limited visualization of the central retina, and potential retinal light toxicity. Here, we establish a novel imaging modality which uses red excitation light (R-AF) and overcomes these drawbacks. R-AF images are high-quality, high-contrast fundus images and image interpretation may build on clinical experience due to similar appearance of pathology as on SW-AF images. Additionally, R-AF images may uncover disease features that previously remained undetected. The R-AF signal increases with higher abundance of lipofuscin and does not depend on photopigment bleaching or on the amount of macular pigment. Improved patient comfort, limited effect of cataract on image quality, and lack of safety concerns qualify R-AF for routine clinical monitoring, e.g. for patients with age-related macular degeneration, Stargardt disease, or for quantitative analysis of AF signal intensity.
    Keywords Medicine ; R ; Science ; Q
    Subject code 610
    Language English
    Publishing date 2023-06-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Detection and Isolation of Emetic Bacillus cereus Toxin Cereulide by Reversed Phase Chromatography

    Eva Maria Kalbhenn / Tobias Bauer / Timo D. Stark / Mandy Knüpfer / Gregor Grass / Monika Ehling-Schulz

    Toxins, Vol 13, Iss 2, p

    2021  Volume 115

    Abstract: The emetic toxin cereulide is a 1.2 kDa dodecadepsipeptide produced by the food pathogen Bacillus cereus . As cereulide poses a serious health risk to humans, sensitive and specific detection, as well as toxin purification and quantification, methods are ...

    Abstract The emetic toxin cereulide is a 1.2 kDa dodecadepsipeptide produced by the food pathogen Bacillus cereus . As cereulide poses a serious health risk to humans, sensitive and specific detection, as well as toxin purification and quantification, methods are of utmost importance. Recently, a stable isotope dilution assay tandem mass spectrometry (SIDA–MS/MS)-based method has been described, and an method for the quantitation of cereulide in foods was established by the International Organization for Standardization (ISO). However, although this SIDA–MS/MS method is highly accurate, the sophisticated high-end MS equipment required for such measurements limits the method’s suitability for microbiological and molecular research. Thus, we aimed to develop a method for cereulide toxin detection and isolation using equipment commonly available in microbiological and biochemical research laboratories. Reproducible detection and relative quantification of cereulide was achieved, employing reversed phase chromatography (RPC). Chromatographic signals were cross validated by ultraperformance liquid chromatography–mass spectrometry (UPLC–MS/MS). The specificity of the RPC method was tested using a test panel of strains that included non-emetic representatives of the B. cereus group, emetic B. cereus strains, and cereulide-deficient isogenic mutants. In summary, the new method represents a robust, economical, and easily accessible research tool that complements existing diagnostics for the detection and quantification of cereulide.
    Keywords cereulide ; reversed phase chromatography (RPC) ; Äkta™ pure ; peptide quantification ; emetic Bacillus cereus ; toxin purification ; Medicine ; R
    Subject code 540
    Language English
    Publishing date 2021-02-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Steatoda nobilis, a false widow on the rise

    Tobias Bauer / Stephan Feldmeier / Henrik Krehenwinkel / Carsten Wieczorrek / Nils Reiser / Rainer Breitling

    NeoBiota, Vol 42, Iss , Pp 19-

    a synthesis of past and current distribution trends

    2019  Volume 43

    Abstract: The Noble False Widow, Steatoda nobilis (Thorell, 1875) (Araneae, Theridiidae), is, due to its relatively large size and potential medical importance, one of the most notable invasive spider species worldwide. Probably originating from the Canary Islands ...

    Abstract The Noble False Widow, Steatoda nobilis (Thorell, 1875) (Araneae, Theridiidae), is, due to its relatively large size and potential medical importance, one of the most notable invasive spider species worldwide. Probably originating from the Canary Islands and Madeira, the species is well established in Western Europe and large parts of the Mediterranean area and has spread recently into California and South America, while Central European populations were not known until 2011. We report on long-time observations that reveal that at least two flourishing populations in Germany (Cologne) have been present for over five years, while in Ecuador one population has been observed between 2014 and 2018 and several other records were made in other parts of the country. Data obtained from the British Spider Recording Scheme demonstrate that the species moved significantly northwards since the report of the first populations in the very South of England, after several decades of relative stasis. The sudden northward expansion highly correlates with a massive rise in press coverage of the species. In the Americas, S. nobilis is currently known from four countries (USA, Chile, Ecuador, Colombia), and available DNA barcoding data obtained for specimens from this area suggest that multiple introductions occurred within each country. Using ecological niche modeling, we identified suitable climate regions for the species and discuss possible reasons for its current spread. We propose that seaside cities and villages with a temperate oceanic or Mediterranean climate are especially favourable potential habitats for S. nobilis and will face the highest colonization pressure in the future, while tropical upland regions with temperate climates are also vulnerable to invasion by S. nobilis.
    Keywords Biology (General) ; QH301-705.5
    Subject code 590
    Language English
    Publishing date 2019-02-01T00:00:00Z
    Publisher Pensoft Publishers
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article: Kinetically Controlled Stepwise Self-Assembly of AuI-Metallopeptides in Water

    Kemper, Benedict / Daniel Spitzer / Lydia Zengerling / Pol Besenius / Ronja Otter / Tobias Bauer

    Journal of the American Chemical Society. 2018 Jan. 17, v. 140, no. 2

    2018  

    Abstract: The combination of attractive supramolecular interactions of a hydrophobic AuI-metallopeptide with the shielding effect of flexible oligoethylene glycol chains provides access to a stepwise self-assembly of a AuI-metalloamphiphile in water. Kinetic ... ...

    Abstract The combination of attractive supramolecular interactions of a hydrophobic AuI-metallopeptide with the shielding effect of flexible oligoethylene glycol chains provides access to a stepwise self-assembly of a AuI-metalloamphiphile in water. Kinetic control of the supramolecular polymer morphology is achieved using a temperature-dependent assembly protocol, which yields low dispersity supramolecular polymers (metastable state I) or helical bundled nanorods (state II).
    Keywords hydrophobicity ; nanorods ; polymers
    Language English
    Dates of publication 2018-0117
    Size p. 534-537.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.7b08189
    Database NAL-Catalogue (AGRICOLA)

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