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Morphological and genetical analysis of pollen collected by honeybees Apis mellifera in urban and park-like surroundings in Vienna, Austria
No full textPollen, die männlichen Keimzellen von Pflanzen, spielen eine entscheidende Rolle in der Befruchtungsbiologie. Die molekularbiologische Forschung zu Pollen hat sich bereits mit PCR-Einstellungen, Bestäubernetzwerken und der öffentlichen Gesundheit in Bezug auf Pollenallergien befasst. Anderen Merkmalen von Pollen, nämlich ihrer Farbe und Homogenität, wurde jedoch bisher weniger Aufmerksamkeit geschenkt. In dieser Studie wurde Pollen von 8 Honigbienenvölkern an 7 Sammeltagen an zwei Standorten in Wien gesammelt und sowohl morphologisch als auch genetisch analysiert. Die gesammelten Pollen wurden gewogen, gezählt und in 12 Farbkategorien eingeteilt. Die meisten Proben lagen in einem Gewichtsbereich von 0-5 Gramm und 15-20 Gramm. 85 % aller gesammelten Pollen waren gelb. Seltene Farben wie rosa, lila, rot, grün und andere machten nur 4 % aller Pollen aus. Die genetische Analyse mit Hilfe eines Abgleichs mit einer lokalen Datenbank zeigt, dass sich die Pflanzenzusammensetzung zwischen den Tagen und Standorten der Honigbienen kaum unterscheidet, dass es aber deutliche Unterschiede zwischen den Farben und den Völkern gibt. Die Art Koelreuteria paniculata wurde am häufigsten nachgewiesen. Bei einem Kontaminationsschwellenwert von 85 % zeigt sich, dass ein großer Teil der Pollenladungen homogen ist (n=192, f=70). Fast alle analysierten Pollenladungen (n=192, f=160) bestanden zu 50% aus einer Pflanzenart. Studien mit mehreren Standorten und mehr Kolonien werden empfohlen, um die Ergebnisse dieser Studie zu untermauern.Pollen, the male gametes of plants, play a crucial role in fertilization biology. Molecular biology research on pollen has already been elaborated on PCR settings, pollination networks and public health concerning pollen allergies. However other characteristics of pollen, namely its color and homogeneity, have gained less attention. In this study, pollen was collected from 8 honeybee colonies on 7 collection days from two sites in Vienna and analyzed both morphologically and genetically. The collected pollen were weighed, counted and divided into 12 color categories. Most samples most samples were in the weight range of 0-5 grams and between 15-20 grams. 85% of all collected pollen were yellow. Rare colors such as pink, purple, red, green and others accounted only for 4% of all pollen loads. The genetic analysis using blasts against a local database shows that the plant composition differs little between the days and locations of the honeybees, but that there are clear differences between the colors and colonies. The species Koelreuteria paniculata was most often detected. A threshold value of 85% shows that a large proportion of the pollen loads are homogeneous (n=192, f=70). Almost all analyzed pollen loads (n=192, f=160) consisted of 50% of one plant species. Studies with multiple sites and more colonies are recommended.submitted by Lars PuseweyMasterarbeit Universität für Bodenkultur Wien 2022Mit deutscher Zusammenfassun
Morphological and genetical analysis of pollen collected by honeybees Apis mellifera in urban and park-like surroundings in Vienna, Austria
No full textPollen, die männlichen Keimzellen von Pflanzen, spielen eine entscheidende Rolle in der Befruchtungsbiologie. Die molekularbiologische Forschung zu Pollen hat sich bereits mit PCR-Einstellungen, Bestäubernetzwerken und der öffentlichen Gesundheit in Bezug auf Pollenallergien befasst. Anderen Merkmalen von Pollen, nämlich ihrer Farbe und Homogenität, wurde jedoch bisher weniger Aufmerksamkeit geschenkt. In dieser Studie wurde Pollen von 8 Honigbienenvölkern an 7 Sammeltagen an zwei Standorten in Wien gesammelt und sowohl morphologisch als auch genetisch analysiert. Die gesammelten Pollen wurden gewogen, gezählt und in 12 Farbkategorien eingeteilt. Die meisten Proben lagen in einem Gewichtsbereich von 0-5 Gramm und 15-20 Gramm. 85 % aller gesammelten Pollen waren gelb. Seltene Farben wie rosa, lila, rot, grün und andere machten nur 4 % aller Pollen aus. Die genetische Analyse mit Hilfe eines Abgleichs mit einer lokalen Datenbank zeigt, dass sich die Pflanzenzusammensetzung zwischen den Tagen und Standorten der Honigbienen kaum unterscheidet, dass es aber deutliche Unterschiede zwischen den Farben und den Völkern gibt. Die Art Koelreuteria paniculata wurde am häufigsten nachgewiesen. Bei einem Kontaminationsschwellenwert von 85 % zeigt sich, dass ein großer Teil der Pollenladungen homogen ist (n=192, f=70). Fast alle analysierten Pollenladungen (n=192, f=160) bestanden zu 50% aus einer Pflanzenart. Studien mit mehreren Standorten und mehr Kolonien werden empfohlen, um die Ergebnisse dieser Studie zu untermauern.Pollen, the male gametes of plants, play a crucial role in fertilization biology. Molecular biology research on pollen has already been elaborated on PCR settings, pollination networks and public health concerning pollen allergies. However other characteristics of pollen, namely its color and homogeneity, have gained less attention. In this study, pollen was collected from 8 honeybee colonies on 7 collection days from two sites in Vienna and analyzed both morphologically and genetically. The collected pollen were weighed, counted and divided into 12 color categories. Most samples most samples were in the weight range of 0-5 grams and between 15-20 grams. 85% of all collected pollen were yellow. Rare colors such as pink, purple, red, green and others accounted only for 4% of all pollen loads. The genetic analysis using blasts against a local database shows that the plant composition differs little between the days and locations of the honeybees, but that there are clear differences between the colors and colonies. The species Koelreuteria paniculata was most often detected. A threshold value of 85% shows that a large proportion of the pollen loads are homogeneous (n=192, f=70). Almost all analyzed pollen loads (n=192, f=160) consisted of 50% of one plant species. Studies with multiple sites and more colonies are recommended.submitted by Lars PuseweyMasterarbeit Universität für Bodenkultur Wien 2022Mit deutscher Zusammenfassun
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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