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First record of the invasive chenopodium aphid, Hayhurstia atriplicis (Linnaeus, 1761) (Hemiptera: Aphididae), in Colombia
No full textThe chenopodium aphid, Hayhurstia atriplicis (Linnaeus, 1761) (Hemiptera: Aphididae), is reported for the first time in Colombia. The aphid was found on the aerial parts of the quinoa plant, Chenopodium quinoa Willd. (Amaranthaceae), especially on the leaves, in five municipalities in the department of Cauca, Colombia. Brief information on its natural enemies, distribution and biology is provided. This is the only aphid in Colombia known to cause malformations on the leaves of quinoa plants. In South America, this aphid has been found previously only in Ecuador, where it was reported for the first time in 2023 based on specimens collected from 2019 to 2021. However, we report that H. atriplicis was likely introduced to Ecuador in the 2000s or earlier, based on a collection dated 2006 found in the United States National Museum of Natural History.
ZooBank registration. urn:lsid:zoobank.org:pub:F43613E0-2854-44DE-9654-74138909717DSe reporta por primera vez en Colombia el pulgón de la quinua Hayhurstia atriplicis (Linnaeus, 1761) (Hemiptera: Aphididae). El pulgón se encontró en las partes aéreas de la planta de quinua Chenopodium quinoa Willd. (Amaranthaceae), especialmente en las hojas, en cinco localidades del departamento del Cauca, Colombia. Se proporciona brevemente información sobre sus enemigos naturales, distribución y biología. Este es el único pulgón en Colombia que se conoce por causar malformaciones en las hojas de las plantas de quinua. En América del Sur, este pulgón se había encontrado anteriormente solo en Ecuador, donde se informó por primera vez en el 2023 con base en especímenes recolectados entre 2019 y 2021; sin embargo, aquí reportamos que H. atriplicis probablemente se introdujo en Ecuador en la década de los 2000s o antes, basado en una colección que data del 2006 encontrada en el Museo Nacional de Historia Natural de Estados Unidos
Ordnung der Fachbereiche Wirtschaftswissenschaften sowie Biochemie, Chemie und Pharmazie der Johann Wolfgang Goethe-Universität Frankfurt am Main für den englischsprachigen Masterstudiengang "Master of Pharma Business Administration" mit dem Abschluss "Master of Business Administration (MBA)" vom 17. Januar 2024 : genehmigt vom Präsidium am 09. April 2024
No full textNew records and five new species of sipunculans (Sipuncula) from the central and northwestern Mexican Pacific
No full textSipuncula are marine unsegmented worms that can be found in benthic habitats, from shallow to deep-sea waters. In Mexico these worms have been scarcely studied. Among nine studies in the entire Mexican Pacific coasts, seven are from the central and northwestern Mexican Pacific. For over 80 years, only 24 species have been recorded. To improve the knowledge of the sipunculans from the central and northwestern Mexican Pacific, 501 specimens from three scientific collections of Mexico were revised. The specimens were collected by diverse methods from intertidal, subtidal, and bathyal depths (~1000 m), from 27 locations along the central and northwestern Mexican Pacific. Sixteen taxa belonging to nine genera and five families were identified. One species is recorded for the first time in the Mexican Pacific and five new species are described, one from intertidal and shallow subtidal depths: Phascolosoma (Phascolosoma) azteca sp. nov.; two from subtidal depths: Phascolion (Lesenka) salgadoi sp. nov. and Sipunculus (Sipunculus) bastidai sp. nov.; and two from bathyal depths: Apionsoma (Apionsoma) silviae sp. nov. and Apionsoma (Edmondsius) hendrickxi sp. nov
A new deep-sea species of Halirages Boeck, 1871 (Crustacea: Amphipoda: Calliopiidae) inhabiting sponges
No full textIn the vast abyssal plains northwest of Iceland, white glass sponges of the genus Caulophacus Schulze, 1886 were inhabited by reddish Bythocaris G.O. Sars, 1870 shrimps and pinkish amphipods. After in situ observations at 3700 m depth, in -1°C waters by a remotely operated vehicle, members of this assemblage were collected and preserved for molecular studies. Based on integrative taxonomic analyses, the amphipods were identified as a new species of the genus Halirages Boeck, 1871 – Halirages spongiae sp. nov. Lörz, Nack & Tandberg –, as described in detail below. Part of our integrative approach was to establish reference DNA barcodes for known species of Halirages. However, our investigation of material of Calliopiidae G.O. Sars, 1895 collected around Iceland and Norway revealed slight morphological discrepancies in all the described species of Halirages. Except for Halirages fulvocinctus (M. Sars, 1858), none of the encountered specimens of Calliopiidae fully matched a current species description. We illuminate the morphological characteristics of nine operational taxonomic units, which also represented clades in COI and 28S. We set the Icelandic samples in the context of Halirages from Canada and Norway. A key to the world species of Halirages is provided
Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
No full textAngel sharks (Squatina spp. Duméril, 1805) are a group of coastal benthic sharks distributed worldwide, currently including threatened and understudied species. Two species are formally described along the East Pacific coast, the California angel shark S. californica Ayres, 1859 and the Chilean angel shark S. armata (Philippi, 1887). The latter species occurs in the southeastern Pacific and has historically been understudied. Additionally, the original description of S. armata lacks sufficient data to confidently identify individuals of this species compared to modern descriptions, and no type specimen is currently available to ensure specimen identification. Detailed morphological descriptions for identifying species are an essential resource for solving taxonomic issues in groups of morphologically similar species and to promote the conservation of critically endangered species. Therefore, a neotype from the type locality is here designated for S. armata, and a detailed and standardized morphological characterization based on modern taxonomic works is provided. This work contributes in improving the knowledge on the Chilean angel shark taxonomy and provides an improved frame of reference for identifying angel sharks in the East Pacific, especially in areas where species may occur in sympatry
Dasydorylas Skevington, 2001 (Pipunculidae, Tomosvaryellini) of Colombia, with description of three new species and a key to Neotropical males
No full textThe cosmopolitan pipunculid genus Dasydorylas Skevington, 2001 includes just a few species from the Neotropical Region and is completely unknown to Colombia. Three new species of Dasydorylas are described from protected areas and conflict territories of limited access in Colombia, namely Dasydorylas colombiensis sp. nov. (type locality: Santuario de Fauna y Flora Iguaque, Boyacá), D. gibber sp. nov. (type locality: Santuario de Fauna y Flora Iguaque, Boyacá), and D. santainesensis sp. nov. (type locality: Páramo de Santa Inés, Belmira, Antioquia). Diagnoses, illustrations and distributional data of the new species are presented. Dasydorylas nigellus (Rafael, 1991) is recorded for the first time from Colombia and its amended diagnosis is provided. An identification key to males of all Neotropical species is presented. With this paper, the number of Neotropical species of Dasydorylas is increased from six to nine
Studying the interaction between charm and light-flavor mesons
No full textThe two-particle momentum correlation functions between charm mesons (D∗± and D±) and charged light-flavor mesons (π± and K±) in all charge-combinations are measured for the first time by the ALICE Collaboration in high-multiplicity proton-proton collisions at a center-of-mass energy of s√=13 TeV. For DK and D∗K pairs, the experimental results are in agreement with theoretical predictions of the residual strong interaction based on quantum chromodynamics calculations on the lattice and chiral effective field theory. In the case of Dπ and D∗π pairs, tension between the calculations including strong interactions and the measurement is observed. For all particle pairs, the data can be adequately described by Coulomb interaction only, indicating a shallow interaction between charm and light-flavor mesons. Finally, the scattering lengths governing the residual strong interaction of the Dπ and D∗π systems are determined by fitting the experimental correlation functions with a model that employs a Gaussian potential. The extracted values are small and compatible with zero
Measurements of long-range two-particle correlation over a wide pseudorapidity range in p–Pb collisions at √sNN = 5.02 TeV
No full textCorrelations in azimuthal angle extending over a long range in pseudorapidity between particles, usually called the "ridge" phenomenon, were discovered in heavy-ion collisions, and later found in pp and p−Pb collisions. In large systems, they are thought to arise from the expansion (collective flow) of the produced particles. Extending these measurements over a wider range in pseudorapidity and final-state particle multiplicity is important to understand better the origin of these long-range correlations in small-collision systems. In this Letter, measurements of the long-range correlations in p−Pb collisions at sNN−−−√=5.02 TeV are extended to a pseudorapidity gap of Δη∼8 between particles using the ALICE, forward multiplicity detectors. After suppressing non-flow correlations, e.g., from jet and resonance decays, the ridge structure is observed to persist up to a very large gap of Δη∼8 for the first time in p−Pb collisions. This shows that the collective flow-like correlations extend over an extensive pseudorapidity range also in small-collision systems such as p−Pb collisions. The pseudorapidity dependence of the second-order anisotropic flow coefficient, v2({\eta}), is extracted from the long-range correlations. The v2(η) results are presented for a wide pseudorapidity range of −3.1<η<4.8 in various centrality classes in p−Pb collisions. To gain a comprehensive understanding of the source of anisotropic flow in small-collision systems, the v2(η) measurements are compared to hydrodynamic and transport model calculations. The comparison suggests that the final-state interactions play a dominant role in developing the anisotropic flow in small-collision systems
Evaluation des Iliakalvenenkatheters als Gefäßzugang zur Hämodialyse im Langzeitverlauf
No full textHintergrund und Ziele: Die Hämodialyse ist das am weitesten verbreitete Nierenersatztherapieverfahren und wird auch in den nächsten Jahren von immer mehr Patienten mit akutem und terminalen Nierenversagen beansprucht werden. Ein großlumiger, sicherer und komplikationsarmer Gefäßzugang ist essenziell für die Durchführung einer effizienten Hämodialyse. Während arterio-venöse Zugänge der klar präferierte Gefäßzugang zur chronischen Hämodialyse sind, eignen sie sich aufgrund ihrer Reifungsdauer nicht für Patienten mit akuter Dialysepflichtigkeit oder für Patienten mit untauglichen Gefäßeigenschaften. Für diese Patienten kann die Hämodialyse über einen Vorhofkatheter erfolgen. Die KDOQI Richtlinien (2019) empfehlen die präferierte Punktion der rechten Vena jugularis interna, jedoch muss für Patienten mit thrombosiertem oder obliteriertem Gefäßstatus die Verwendung neuer, unkonventionellerer Zugangswege erwogen werden, um die überlebenswichtige Hämodialyse zu ermöglichen. Ein solcher unkonventioneller Zugangsweg ist der erstmals 2006 von Betz et al. beschriebene Iliakalvenenkatheter, der während seines Beobachtungszeitraums von 1.500 Kathetertagen initial die Sicherheit und Effektivität des Verfahrens vermuten ließ.
Die vorliegende Arbeit stellt eine retrospektive Analyse des Langzeitverlaufs von 95 Iliakalvenenkathetern zur Hämodialyse dar, die in den Jahren 2004 bis 2022 im Universitätsklinikum Frankfurt implantiert wurden. Der nun deutlich längere kumulative Beobachtungszeitraum von 20.252 Tagen soll beurteilen, ob sich die ursprünglich durch Betz et al. beschriebenen Ergebnisse auch im Langzeitverlauf bestätigen und soll weiterführend einordnen, inwieweit der Iliakalvenenkatheter als Option des Zugangsweges zur chronischen Hämodialyse für Patienten mit schwierigem Gefäßstatus in Betracht gezogen werden kann.
Patienten und Methoden: Das Patientenkollektiv bestand aus 79 Patienten (49 Männer und 30 Frauen) eines breiten Altersspektrums zum Zeitpunkt der Implantation (27 bis 84 Jahre), die während des Beobachtungszeitraums einen oder im Verlauf mehrere Dialysekatheter über eine der Iliakalvenen implantiert bekamen. Insgesamt wurden 95 Iliakalvenenkatheter erfasst und im Hinblick auf ihre Liegedauer, Komplikationsraten und Dialyse-Effektivität evaluiert.
Die Datenerhebung erfolgte aus den archivierten Patientenakten und Dialyseprotokollen des Universitätsklinikums Frankfurt und ergänzend mittels Datenanforderung von weiterbehandelnden Zentren, Praxen und Kliniken.
Ergebnisse: Der Iliakalvenenkatheter kam bei einem speziellen Patientenkollektiv zum Einsatz, welches oftmals bereits eine lange nephrologische Krankheitsgeschichte (im Durchschnitt erfolgte die Implantation 895,5 Tage nach der primären Andialyse), mehrere gescheiterte Gefäßzugänge 3,01(±2,97) und keine Alternativen eines sicheren konventionellen Gefäßzugangs zur Hämodialyse aufwiesen. Die Katheter-Anlage verlief bei 98,96% der Implantationsversuche erfolgreich. Alle erfolgreichen Anlagen verliefen komplikationslos. Die durchschnittliche Katheter-Liegedauer betrug 853,7 (± 162,87) Kathetertage und die primary patency der Katheter lag im Mittelwert bei 507,60 (±58,33) Tagen. Die Gesamt-Infektionsrate der Iliakalvenenkatheter lag bei 0,69/1.000 Kathetertage und eine Katheter-Dysfunktion war in acht Fällen der Grund der Katheter- Entfernung (8,4%). Die durchschnittliche Urea Reduction Rate betrug 68,9% (± 7,1). Es bestand kein statistisch signifikanter Zusammenhang zwischen Alter (p=0.37), Geschlecht (p=0,61), BMI (p=0.97) oder Seitenlage des Katheters (p=0.22) und der Katheter-Liegedauer. Im Verlauf erfolgte bei drei Patienten eine erfolgreiche Nierentransplantation.
Schlussfolgerungen: Die Implantation des Iliakalvenenkatheters hat eine hohe Erfolgsrate, ein niedriges Komplikationsrisiko, ist technisch leicht zu erlernen und bedarf keiner aufwendigen interventionellen Rahmenbedingungen. Auch im Verlauf zeigt sich ein Komplikationsprofil, das in Bezug auf Katheter-Infektionen, Katheter-Dysfunktion, Katheter-Thrombosen und Komplikations-bedingten Explantationen den etablierten Zugangswegen mindestens gleichwertig ist. Außerdem konnte gezeigt werden, dass der Iliakalvenenkatheter eine lange Komplikations-freie Liegedauer hat und in Einzelfällen auch über mehrere Jahre hinweg eine suffiziente Hämodialyse gewährleisten kann. Geäußerte Bedenken, nach welchen eine spätere Nierentransplantation nicht möglich sei, konnten ausgeräumt werden. Des Weiteren beschreibt die vorliegende Studie erstmalig den Langzeitverlauf des Iliakalvenenkatheters bei einem Patientenkollektiv eines breiten Altersspektrums und zeigte auch die altersunabhängige Eignung des Zugangsweges.Background and Objectives: Hemodialysis is the most widely used renal replacement therapy and will continue to be utilized by increasing numbers of patients with renal failure in the coming years. Largelumen, safe, and low-complication vascular access is essential for performing efficient hemodialysis. While arterio-venous accesses are the preferred vascular access for chronic hemodialysis, their maturation time makes them unsuitable for patients with acute dialysis requirements, as well as for patients with unfit vascular conditions. For these patients, hemodialysis can be provided via central venous catheters. Actual KDOQI guidelines (2019) recommend the preferred puncture of the right internal jugular vein, but for patients with depleted vascular status, the use of more unconventional access routes must be considered. One such unconventional access route is the iliac vein catheter first described by Betz et al. in 2006, which initially suggested the safety and efficacy of the procedure during its observation period of 1,500 catheter days.
The present work represents a retrospective analysis of the long-term course of 95 iliac vein catheters for hemodialysis implanted at University Hospital Frankfurt from 2004 to 2022. The now significantly longer cumulative observation period of 20,252 days is intended to assess whether the results originally described by Betz et al. are also confirmed in the long-term course and to further classify the extent to which the iliac vein catheter can be considered as an option of the access route for chronic hemodialysis for patients with difficult vascular status.
Patients and Methods: The patient population consisted of 79 patients (49 men and 30 women) of a wide age range at the time of implantation (27 to 84 years). The patients had one or more dialysis catheters implanted via one of the iliac veins during the observation period. A total of 95 iliac vein catheters were recorded and evaluated for their duration of survival, complication rates, and dialysis effectiveness. Data were collected from the archived patient records and dialysis protocols of the University Hospital Frankfurt and, in addition, by requesting data from centers, practices and clinics providing further treatment.
Results: The iliac vein catheter was used in a special patient population, often with a long nephrological disease history (on average 895.5 days after onset of dialysis), several failed vascular accesses 3.01(±2.97) and no alternatives of a safe conventional vascular access for hemodialysis. Catheter placement was successful in 98.96% of implantation attempts. All successful installations were without complications thereafter. The mean catheter placement duration was 853.7 (± 162.87) catheter days, and the mean primary patency of the catheters was 507.60 (±58.33) days. The overall infection rate of iliac vein catheters was 0.69/1,000 catheter days, and catheter dysfunction was the reason for catheter removal in eight cases (8.4%). The mean urea reduction rate was 68.9% (± 7.1). There was no statistically significant association between age (p=0.37), gender (p=0.61), BMI (p=0.97) or left- or right-sided position of the catheter (p=0.22) and the duration of catheter placement. In the further course three patients underwent successful kidney transplantation.
Conclusions: Implantation of the iliac vein catheter has a high success rate, a low risk of complications, is technically easy to learn and does not require an elaborate interventional setting. The cuffed iliac vein catheter has a complication profile during follow-up that is at least equivalent to established access routes in terms of catheter infection, catheter dysfunction, catheter thrombosis, and complication-related removal.
Furthermore, it has been shown that the iliac vein catheter has a long complication-free survival and can provide sufficient hemodialysis for several years in individual cases. An originally expressed concern of unsuitability for kidney transplantation in the course could be eliminated. Furthermore, the present study describes for the first time the long-term course of the iliac vein catheter in a patient population of a broad age range and showed the age-independent suitability of the access route