scholarly journals Extensive gene rearrangements in the mitogenomes of congeneric annelid species and insights on the evolutionary history of the genus Ophryotrocha

BMC Genomics ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Astrid Tempestini ◽  
Gloria Massamba-N’Siala ◽  
Fanny Vermandele ◽  
Nicholas Beaudreau ◽  
Mathieu Mortz ◽  
...  
Keyword(s):  
16S Rdna ◽  
Gene Order ◽  
Model Organism ◽  
Reproductive Mode ◽  
Single Species ◽  
Nuclear Fragment ◽  
Evolution Of Life ◽  
History Of ◽  
High Level ◽  
Diverse Groups

Abstract Background Annelids are one the most speciose and ecologically diverse groups of metazoans. Although a significant effort has been recently invested in sequencing genomes of a wide array of metazoans, many orders and families within the phylum Annelida are still represented by a single specimen of a single species. The genus of interstitial annelids Ophryotrocha (Dorvilleidae, Errantia, Annelida) is among these neglected groups, despite its extensive use as model organism in numerous studies on the evolution of life history, physiological and ecological traits. To compensate for the paucity of genomic information in this genus, we here obtained novel complete mitochondrial genomes of six Ophryotrocha species using next generation sequencing. In addition, we investigated the evolution of the reproductive mode in the Ophryotrocha genus using a phylogeny based on two mitochondrial markers (COXI and 16S rDNA) and one nuclear fragment (Histone H3). Results Surprisingly, gene order was not conserved among the six Ophryotrocha species investigated, and varied greatly as compared to those found in other annelid species within the class Errantia. The mitogenome phylogeny for the six Ophryotrocha species displayed a separation of gonochoric and hermaphroditic species. However, this separation was not observed in the phylogeny based on the COX1, 16S rDNA, and H3 genes. Parsimony and Bayesian ancestral trait reconstruction indicated that gonochorism was the most parsimonious ancestral reproductive mode in Ophryotrocha spp. Conclusions Our results highlight the remarkably high level of gene order variation among congeneric species, even in annelids. This encourages the need for additional mitogenome sequencing of annelid taxa in order to properly understand its mtDNA evolution, high biodiversity and phylogenetic relationships.

The genome sequence of Bacillus subtilis subsp. spizizenii W23: insights into speciation within the B. subtilis complex and into the history of B. subtilis genetics

Microbiology ◽  
2011 ◽  
Vol 157 (7) ◽  
pp. 2033-2041 ◽  
Author(s):  
Daniel R. Zeigler
Keyword(s):  
Bacillus Subtilis ◽  
Simple Model ◽  
Genome Sequence ◽  
Gene Order ◽  
Species Complex ◽  
Base Composition ◽  
Core Genome ◽  
Model Organism ◽  
History Of ◽  
Subtilis Subsp

The genome sequence of Bacillus subtilis subsp. spizizenii W23 has been determined. The sequence strongly suggests that W23 is a direct descendant of B. subtilis ATCC 6633. W23 shares a 3.6 Mb core genome with the intensively studied model organism B. subtilis subsp. subtilis 168, and gene order within this core has been strongly conserved. Additionally, the W23 genome has 157 accessory (that is, non-core) genome segments that are not found in 168, while the 168 genome has 141 segments not found in W23. The distribution of sequences similar to these accessory segments among other genomes of the B. subtilis species complex shows that those sequences having entered into the phylogeny of the complex more recently tend to be larger and more AT-rich than those having entered earlier. A simple model can account for these observations, in which parasitic or symbiotic DNAs are transferred into the genome and then are reduced in size and modified in base composition during speciation.

scholarly journals The untapped potential of medaka and its wild relatives

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Leon Hilgers ◽  
Julia Schwarzer
Keyword(s):  
Current Knowledge ◽  
Model Organism ◽  
Single Species ◽  
Wild Relatives ◽  
Species Boundaries ◽  
Future Research ◽  
Important Goal ◽  
Evolutionary Context ◽  
In The Wild ◽  
History Of

The medaka is a fish that has served as a model organism for over a century, yet there is still much to learn about its life in the wild. Here we summarize the current knowledge, highlight recent progress and outline remaining gaps in our understanding of the natural history of medaka. It has also become clear over time that rather than being a single species, medaka comprises an entire species complex, so disentangling the species boundaries is an important goal for future research. Moreover, medaka and other ricefishes exhibit striking functional diversity, little of which has been investigated to date. As such, there are opportunities to use the resources developed for medaka to study other ricefishes, and to learn more about medaka itself in an evolutionary context.

A Confrontation between Two Doctrines: The Birth of Struggle for Hegemony in Hebrew Children's Literature during the 1930s and 1940s

2008 ◽  
Vol 1 (2) ◽  
pp. 139-155 ◽  
Author(s):  
YAEL DARR
Keyword(s):  
Children's Literature ◽  
Educational System ◽  
Single Channel ◽  
Children’S Literature ◽  
The Political ◽  
Literary Creation ◽  
History Of ◽  
High Level ◽  
First Time ◽  
Literary Quality

This article describes a crucial and fundamental stage in the transformation of Hebrew children's literature, during the late 1930s and 1940s, from a single channel of expression to a multi-layered polyphony of models and voices. It claims that for the first time in the history of Hebrew children's literature there took place a doctrinal confrontation between two groups of taste-makers. The article outlines the pedagogical and ideological designs of traditionalist Zionist educators, and suggests how these were challenged by a group of prominent writers of adult poetry, members of the Modernist movement. These writers, it is argued, advocated autonomous literary creation, and insisted on a high level of literary quality. Their intervention not only dramatically changed the repertoire of Hebrew children's literature, but also the rules of literary discourse. The article suggests that, through the Modernists’ polemical efforts, Hebrew children's literature was able to free itself from its position as an apparatus controlled by the political-educational system and to become a dynamic and multi-layered field.

Ethics of Conducting Virtual Ethnography on Visual Platforms

2018 ◽  
Vol 12 (2) ◽  
pp. 163-178
Author(s):  
Kayla Wheeler
Keyword(s):  
African American ◽  
Online Community ◽  
Gender Segregation ◽  
Religious Groups ◽  
Virtual Ethnography ◽  
History Of ◽  
Standard Set ◽  
Potential Risks ◽  
Visually Based ◽  
Diverse Groups

For scholars, the internet provides a space to study diverse groups of people across the world and can be a useful way to bypass physical gender segregation and travel constraints. Despite the potential for new insights into people’s everyday life and increased attention from scholars, there is no standard set of ethics for conducting virtual ethnography on visually based platforms, like YouTube and Instagram. While publicly accessible social media posts are often understood to be a part of the public domain and thus do not require a researcher to obtain a user’s consent before publishing data, caution must be taken when studying members of a vulnerable community, especially those who have a history of surveillance, like African-American Muslims. Using a womanist approach, the author provides recommendations for studying vulnerable religious groups online, based on a case study of a YouTube channel, Muslimah2Muslimah, operated by two African-American Muslim women. The article provides an important contribution to the field of media studies because the author discusses a “dead” online community, where users no longer comment on the videos and do not maintain their own profiles, making obtaining consent difficult and the potential risks of revealing information to an unknown community hard to gauge.

A New Step in the Study of the History of the Russian Prosecutor’s Office

2019 ◽  
pp. 94-98
Keyword(s):  
Russian Federation ◽  
Russian Empire ◽  
Practical Significance ◽  
History Of ◽  
The Russian Federation ◽  
The Russian Empire ◽  
High Level ◽  
The University

The paper is a review on the textbook by A. V. Yeremin, «The History of the National Prosecutor’s office» and the anthology «The Prosecutor’s Office of the Russian Empire in the Documents of 1722–1917» (authors: V. V. Lavrov, A. V. Eremin, edited by N. M. Ivanov) published at the St. Petersburg Law Institute (branch) of the University of the Prosecutor’s office of the Russian Federation in 2018. The reviewers emphasize the high relevance and high level of research, their theoretical and practical significance. The textbook and the anthology will help the students increase their legal awareness, expand their horizons.

“Ukrayinskyi Prapor” (1923—1932s): the Berlin period of the newspaper of the President of the Ukrainian National Council

2019 ◽  
pp. 13-33
Author(s):  
Nadiia Kulesha
Keyword(s):  
National Policy ◽  
Editorial Staff ◽  
National Council ◽  
Soviet Rule ◽  
Editorial Content ◽  
Paper Record ◽  
Science And Culture ◽  
History Of ◽  
High Level ◽  
Mainstream Press

The centenary of the Ukrainian Revolution (1917―1921s) made relevant the interest to the developments and the personalities of that time, specifically, to the personality of the President of the ZUNR, Petrushevych, Yevhen. The newspaper «Ukrayinskyi Prapor» founded in 1919 in Vienna, throughout its existence, was considered as an official print organ of the Dictator (i.e., Y. Petrushevych). The Vienna period of this publication lasted from August 1919 to mid-November 1923. From the end of November 1923 till April 1932, the paper was published in the capital of the Weimar Republic, Berlin. It was the only newspaper of the Ukrainian emigration published for the longest time in interwar Germany. It was an example of a socio-political periodical. There collaborated outstanding editors and publicists. The pages of this paper record the history of the diplomatic struggle of the West Ukrainian foreign representatives for the liberation of the Eastern Galicia from the protectorate of Poland and the restoration of Ukrainian statehood. Its materials documented the course of the occupation of the Eastern Galicia by Poland and the process of «Polonization» of the Ukrainian population of that region. The article explores the Berlin period of existence of the magazine. Specifically, it studies the changes in the ideological line of the magazine, more specifically, its pro-Soviet editorial orientation because of the illusions about the transformation of the national policy of the Soviet rule in Ukraine, especially during the period of Ukrainization. Then the traditional headings of the magazine were joined by the publications with positive coverage of the flourishing Ukrainianization in Soviet Ukraine. The newspaper also actively reacted to the SVU (Union for Liberation of Ukraine) trial in Kharkiv, justifying the position of the Soviet authorities. The paper’s editorial staff were well-known figures of Ukrainian politics, science, and culture: Yu. Bachynsky, O. Hrytsai, A. Zhuk, M. Lozynsky, R. Perfetsky, and others. They provided a high level of editorial content with high-quality, multifaceted texts. We conclude that in terms of the editorial content and formal aspects, the newspaper «Ukrayinskyi Prapor» matched the standards of the European mainstream press of that time.

Comparison of Non-radiographic Axial Spondyloarthritis and Ankylosing Spondyltis from a Single Rheumatology Hospital in Morocco

2020 ◽  
Vol 16 (3) ◽  
pp. 240-244 ◽  
Author(s):  
Nessrine Akasbi ◽  
Siar Nihad ◽  
Zoukal Sofia ◽  
El Kohen Khadija ◽  
Harzy Taoufik
Keyword(s):  
Disease Burden ◽  
Axial Spondyloarthritis ◽  
Univariate Analysis ◽  
Cross Sectional Study ◽  
Low Back ◽  
New Classification ◽  
Cross Sectional ◽  
Asas Criteria ◽  
History Of ◽  
High Level

Background: According to the new classification criteria developed by The Assessment of SpondyloArthritis International Society, patients with axial spondyloarthritis (axSpA) can be classified in 2 subgroups: Patients with radiographic axial spondyloarthritis: ankylosing spondylitis patients (AS) and those with non-radiographic axial spondyloarthritis (nr-axSpA). Objective: The aim of the present study is to describe and discuss the differences and similarities between the two subgroups. Patients and Methods: A cross-sectional study was conducted in a single rheumatology hospital in Morocco. These included patients diagnosed as having axial spondyloarthritis according to ASAS criteria 2010, during a period of 6 years. The AS and the nr-axSpA subgroups were compared for the various axSpA-related variables. Results: Of the 277 patients with a diagnosis of axial SpA who were included in this study, 160 had AS and 117 had nr-axSpA. AS and nr-ax-SpA shared a similar age at diagnosis, similar prevalence of low back pain, lumbar stiffness, extra-articular manifestations, BASDAI and BASFI. In the multivariate analysis, AS patients were mainly male with cervical stiffness, enthesitis, coxitis and high level of ESR (erythrocyte sedimentation rate). The females generally had a family history of SpA and arthritis and were associated to the nr-axSpA form in the univariate analysis. Conclusion: This was the first study to characterise patients with AS and nr-axSpA in Morocco. Consistent with other studies published, this study showed that patients with nr-axSpA and patients with AS shared a comparable degree of disease burden.

scholarly journals Linking morphological and molecular sources to disentangle the case of Xylodon australis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Javier Fernández-López ◽  
M. Teresa Telleria ◽  
Margarita Dueñas ◽  
Mara Laguna-Castro ◽  
Klaus Schliep ◽  
...  
Keyword(s):  
New Zealand ◽  
Phylogenetic Analyses ◽  
Single Species ◽  
R Package ◽  
Molecular Data ◽  
Historical Collections ◽  
Close Relationship ◽  
Kinship Relations ◽  
History Of ◽  
Different Sources

AbstractThe use of different sources of evidence has been recommended in order to conduct species delimitation analyses to solve taxonomic issues. In this study, we use a maximum likelihood framework to combine morphological and molecular traits to study the case of Xylodon australis (Hymenochaetales, Basidiomycota) using the locate.yeti function from the phytools R package. Xylodon australis has been considered a single species distributed across Australia, New Zealand and Patagonia. Multi-locus phylogenetic analyses were conducted to unmask the actual diversity under X. australis as well as the kinship relations respect their relatives. To assess the taxonomic position of each clade, locate.yeti function was used to locate in a molecular phylogeny the X. australis type material for which no molecular data was available using morphological continuous traits. Two different species were distinguished under the X. australis name, one from Australia–New Zealand and other from Patagonia. In addition, a close relationship with Xylodon lenis, a species from the South East of Asia, was confirmed for the Patagonian clade. We discuss the implications of our results for the biogeographical history of this genus and we evaluate the potential of this method to be used with historical collections for which molecular data is not available.

scholarly journals COVID-19 Vaccine Acceptance in Azuay Province, Ecuador: A Cross-Sectional Online Survey

Vaccines ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 678
Author(s):  
Julio Jaramillo-Monge ◽  
Michael Obimpeh ◽  
Bernardo Vega ◽  
David Acurio ◽  
Annelies Boven ◽  
...  
Keyword(s):  
Rural Areas ◽  
Online Survey ◽  
Vaccination Campaign ◽  
Postgraduate Education ◽  
Effective Vaccine ◽  
Cross Sectional ◽  
Lower Education Level ◽  
Vaccination Acceptance ◽  
History Of ◽  
High Level

We investigated the COVID-19 vaccination acceptance level in Azuay province, Ecuador through an online survey from 12th to 26th February (before the start of the COVID-19 vaccination campaign in Ecuador). Overall, 1219 respondents participated in the survey. The mean age was 32 ± 13 years; 693 participants (57%) were female. In total, 1109 (91%) of the participants indicated they were willing to be vaccinated with a COVID-19 vaccine, if the vaccine is at least 95% effective; 835 (68.5%) if it is 90% effective and 493 (40.5%) if it is 70% effective; 676 (55.5%) participants indicated they feared side effects and 237 (19.4%) thought the vaccine was not effective. Older age, having had a postgraduate education, a history of a negative COVID-19 test, a high level of worry of contracting COVID-19, believing that COVID-19 infection can be prevented with a vaccine and understanding there is currently an effective vaccine against COVID-19 were associated with higher vaccination acceptance. A vaccination education campaign will be needed to increase the knowledge of Ecuadorians about the COVID-19 vaccine and to increase their trust in the vaccine. People with a lower education level and living in rural areas may need to be targeted during such a campaign.

Psychological, Structural, Social and Economic Determinants of Suicide Attempt: Risk Assessment and Decision Making Strategies

2021 ◽  
pp. 003022282110034
Author(s):  
Azam Farmani ◽  
Mojtaba Rahimianbougar ◽  
Yousef Mohammadi ◽  
Hossein Faramarzi ◽  
Siamak Khodarahimi ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Suicide Attempt ◽  
Suicide Attempts ◽  
Psychological Services ◽  
Cross Sectional ◽  
Economic Determinants ◽  
History Of ◽  
Cross Sectional Design ◽  
High Level ◽  
Risk Assessment And Management

The aim of this research was to conduct a risk assessment and management of psychological, structural, social and economic determinants (PSSED) in a suicide attempt. The sample consisted of 353 individuals who had a recorded history of suicidal attempt; and 20 professional individuals by purposive sampling method within a descriptive cross-sectional design. Worksheets for RAM and AHP were used for data collection in this study. The rate of suicide attempt was 7.21 per 100,000 population in this study. Analysis showed that depression and mental disorders; personality disorders; family problems; socio-cultural and economic problems; lack of awareness; and low level of education have a high level of risk for suicide attempts. Psychiatric and psychological services; awareness and knowledge of life skills; medical services to dysfunctional families; development of community-based planning for PSSED of suicide; and employment and entrepreneurship services may lower suicide attempt risk.

Sign in / Sign up

Export Citation Format

Share Document