Vocalizations of the Sepia short-tailed Opossum Monodelphis adusta (Thomas, 1897, Didelphimorphia: Didelphidae)

Mammalia ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Carlos Nivelo-Villavicencio ◽  
Jose Vieira
Keyword(s):  
Diverse Group

Abstract As part of their behavior, various groups of species, including marsupials and other mammals, have evolved vocalizations, with varying degrees of complexity, for different communication purposes. Despite the growing interest in the bioacoustics of species, there are groups in which the study in this field is still unknown. A clear example is the genus Monodelphis, the most diverse group of didelphid marsupials. In this work we present the first description of the vocalizations of Monodelphis adusta, the only species of the genus registered in Ecuador, which shows the ability to produce audible phrases with different numbers of syllables.

CONTRIBUIÇÃO AO CONHECIMENTO DA AVIFAUNA DO MUNICÍPIO DE TAQUARA, RIO GRANDE DO SUL

2019 ◽  
Vol 2 ◽  
pp. 28
Author(s):  
Marcelo Pereira de Barros ◽  
Ana Paula Lima da Silveira ◽  
Bruna Reis Ferreira
Keyword(s):  
Rural Areas ◽  
Rio Grande ◽  
Bird Community ◽  
Frequency Of Occurrence ◽  
Diverse Group ◽  
Rio Grande Do Sul ◽  
Natural Ecosystems ◽  
Environmental Disturbances ◽  
Environmental Pressures ◽  
Hydrographic Basin

As aves destacam-se dentro dos vertebrados por serem um grupo diverso e adaptado a diferentes ambientes, a composição da comunidade de aves de um determinado local é um importante bioindicador ambiental, pois ela reflete alterações recentes ou pretéritas de determinada área. Na Bacia Hidrográfica do Rio dos Sinos, as pressões sobre os remanescentes de ecossistemas naturais são intensas em decorrência da urbanização crescente, do estabelecimento de indústrias e da ampliação das fronteiras agrícolas, esses fatores associados geram a redução e fragmentação de habitats, com impactos irrecuperáveis para a flora e a fauna. Devido à escassez de dados sobre a avifauna do município de Taquara, o presente estudo teve como objetivo levantar informações sobre o grupo, listando as espécies de aves locais. Entre agosto de 2016 e junho de 2017 foram realizadas quatro amostragens mensais em duas áreas rurais do município, totalizando 44 campanhas de observação e 132 horas de esforço amostral. As espécies foram identificadas e classificadas conforme sua frequência de ocorrência mensal, em espécies comuns e raras. Foram registradas 133 espécies distribuídas em 47 famílias, o que representa mais de 20% das espécies ocorrentes para o estado. Ao longo do período amostrado, 90 espécies foram classificadas como comuns e 47 consideradas raras para as áreas pesquisadas.Palavras-chave: Aves. Bacia hidrográfica do Rio dos Sinos. Preservação.ABSTRACTBirds stand out within vertebrates because they are a diverse group adapted to different environments. The composition of the bird community of a certain place is an important environmental bioindicator since it reflects recent or previous environmental disturbances of a certain area. In the Sinos River Basin, environmental pressures on the remnants of natural ecosystems are intense as a result of increasing urbanization, the establishment of industries and expansion of agricultural frontiers which generate habitat reduction and fragmentation with irrecoverable damages on flora and fauna. Due to the scarcity of data on the avifauna of the municipality of Taquara, the present study aimed to gather information and list the species of local birds. Between August 2016 and June 2017, four monthly samplings were carried out in two rural areas of the municipality, totaling 44 observation campaigns and 132 hours of sample effort. The species were identified and classified as common and rare according to their frequency of occurrence. There were 133 species distributed in 47 families, representing more than 20% of the species that occurred in the state. During the sampled period, 90 species were classified as common and 47 were considered rare for the areas surveyed.Keywords: Birds. Hydrographic basin of Sinos River. Preservation.

Strain and Within‐Season Variability of Various Allelochemics Within A Diverse Group of Cottons 1

Crop Science ◽  
1982 ◽  
Vol 22 (6) ◽  
pp. 1235-1238 ◽  
Author(s):  
W. H. White ◽  
J. N. Jenkins ◽  
W. L. Parrott ◽  
J. C. McCarty ◽  
D. H. Collum ◽  
...  
Keyword(s):  
Diverse Group

The “Islamization of America”?

2018 ◽  
Author(s):  
Muna Ali
Keyword(s):  
Diverse Group ◽  
Religious Leaders

In addition to the diverse Muslims who invoke the narrative of “pure/true” Islam, there is an unlikely group of non-Muslims Americans who argue that rather than fringe extremist Muslims perverting Islam, it is actually the “pure/true” Islam followers who threaten America and Europe. This alarmist group consists of some conservatives, some political and religious leaders, some new atheist icons, and a cadre of former and current Muslims, many of whom claim to be feminists. This chapter examines the different ideological trends within this diverse group and explores how its members have constructed a narrative of the “Islamization of America.” Through a case study, the chapter demonstrates how this discourse shifted from the margins to the mainstream. It explores whether the rhetoric and actions this narrative inspires is Islamophobia, anti-Muslim racism, or merely a legitimate critique of Muslims and Islam; and the chapter argues that this narrative serves as a strong instrument in the racialization process of Muslims.

scholarly journals Annelid Diversity: Historical Overview and Future Perspectives

Diversity ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 129
Author(s):  
María Capa ◽  
Pat Hutchings
Keyword(s):  
State Of The Art ◽  
Molecular Taxonomy ◽  
Evolutionary Relationships ◽  
Diverse Group ◽  
Future Perspectives ◽  
Special Issue ◽  
Species Numbers ◽  
Species Complexes ◽  
Taxonomic Groups ◽  
A New Species

Annelida is a ubiquitous, common and diverse group of organisms, found in terrestrial, fresh waters and marine environments. Despite the large efforts put into resolving the evolutionary relationships of these and other Lophotrochozoa, and the delineation of the basal nodes within the group, these are still unanswered. Annelida holds an enormous diversity of forms and biological strategies alongside a large number of species, following Arthropoda, Mollusca, Vertebrata and perhaps Platyhelminthes, among the species most rich in phyla within Metazoa. The number of currently accepted annelid species changes rapidly when taxonomic groups are revised due to synonymies and descriptions of a new species. The group is also experiencing a recent increase in species numbers as a consequence of the use of molecular taxonomy methods, which allows the delineation of the entities within species complexes. This review aims at succinctly reviewing the state-of-the-art of annelid diversity and summarizing the main systematic revisions carried out in the group. Moreover, it should be considered as the introduction to the papers that form this Special Issue on Systematics and Biodiversity of Annelids.

scholarly journals Voices of Experience: What Do Low-Income Older Adults Tell Us About Mobility, Technology, and Social Participation?

2021 ◽  
pp. 073346482110125
Author(s):  
Haley B. Gallo ◽  
Lia W. Marshall ◽  
Lené Levy-Storms ◽  
Kathleen H. Wilber ◽  
Anastasia Loukaitou-Sideris
Keyword(s):  
Older Adults ◽  
Los Angeles ◽  
Qualitative Study ◽  
Thematic Analysis ◽  
Social Participation ◽  
Low Income ◽  
Technology Use ◽  
Diverse Group ◽  
Senior Center ◽  
Perceived Safety

Mobility and technology can facilitate in-person and virtual social participation to help reduce social isolation, but issues exist regarding older adults’ access, feasibility, and motivation to use various forms of mobility and technology. This qualitative study explores how a diverse group of low-income, urban-living older adults use mobility and technology for social participation. We conducted six focus groups ( N = 48), two each in English, Spanish, and Korean at a Los Angeles senior center. Three major themes emerged from thematic analysis: using technology for mobility; links between mobility and social participation; and technology-mediated social participation. Cost, perceived safety, (dis)ability, and support from family and friends were related to mobility and technology use. This study demonstrates the range of mobility and technology uses among older adults and associated barriers. The findings can help establish a pre-COVID-19 baseline on how to make mobility and technology more accessible for older adults at risk of isolation.

scholarly journals Fe(2)OG: an integrated HMM profile-based web server to predict and analyze putative non-haem iron(II)- and 2-oxoglutarate-dependent dioxygenase function in protein sequences

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Siddhartha Kundu
Keyword(s):  
Amino Acid ◽  
Water Molecule ◽  
Active Site ◽  
Ferrous Iron ◽  
Web Server ◽  
Protein Sequences ◽  
Diverse Group ◽  
And Function ◽  
Functionally Diverse ◽  
Haem Iron

Abstract Objective Non-haem iron(II)- and 2-oxoglutarate-dependent dioxygenases (i2OGdd), are a taxonomically and functionally diverse group of enzymes. The active site comprises ferrous iron in a hexa-coordinated distorted octahedron with the apoenzyme, 2-oxoglutarate and a displaceable water molecule. Current information on novel i2OGdd members is sparse and relies on computationally-derived annotation schema. The dissimilar amino acid composition and variable active site geometry thereof, results in differing reaction chemistries amongst i2OGdd members. An additional need of researchers is a curated list of sequences with putative i2OGdd function which can be probed further for empirical data. Results This work reports the implementation of $$Fe\left(2\right)OG$$ F e 2 O G , a web server with dual functionality and an extension of previous work on i2OGdd enzymes $$\left(Fe\left(2\right)OG\equiv \{H2OGpred,DB2OG\}\right)$$ F e 2 O G ≡ { H 2 O G p r e d , D B 2 O G } . $$Fe\left(2\right)OG$$ F e 2 O G , in this form is completely revised, updated (URL, scripts, repository) and will strengthen the knowledge base of investigators on i2OGdd biochemistry and function. $$Fe\left(2\right)OG$$ F e 2 O G , utilizes the superior predictive propensity of HMM-profiles of laboratory validated i2OGdd members to predict probable active site geometries in user-defined protein sequences. $$Fe\left(2\right)OG$$ F e 2 O G , also provides researchers with a pre-compiled list of analyzed and searchable i2OGdd-like sequences, many of which may be clinically relevant. $$Fe(2)OG$$ F e ( 2 ) O G , is freely available (http://204.152.217.16/Fe2OG.html) and supersedes all previous versions, i.e., H2OGpred, DB2OG.

scholarly journals The CXCL12 Crossroads in Cancer Stem Cells and Their Niche

Cancers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 469
Author(s):  
Juan Carlos López-Gil ◽  
Laura Martin-Hijano ◽  
Patrick C. Hermann ◽  
Bruno Sainz
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Tumor Microenvironment ◽  
Cancer Stem Cells ◽  
Crucial Role ◽  
Diverse Group ◽  
Hematopoietic Stem ◽  
Stem Cell Support ◽  
Cell Support ◽  
Tumor Entities

Cancer stem cells (CSCs) are defined as a subpopulation of “stem”-like cells within the tumor with unique characteristics that allow them to maintain tumor growth, escape standard anti-tumor therapies and drive subsequent repopulation of the tumor. This is the result of their intrinsic “stem”-like features and the strong driving influence of the CSC niche, a subcompartment within the tumor microenvironment that includes a diverse group of cells focused on maintaining and supporting the CSC. CXCL12 is a chemokine that plays a crucial role in hematopoietic stem cell support and has been extensively reported to be involved in several cancer-related processes. In this review, we will provide the latest evidence about the interactions between CSC niche-derived CXCL12 and its receptors—CXCR4 and CXCR7—present on CSC populations across different tumor entities. The interactions facilitated by CXCL12/CXCR4/CXCR7 axes seem to be strongly linked to CSC “stem”-like features, tumor progression, and metastasis promotion. Altogether, this suggests a role for CXCL12 and its receptors in the maintenance of CSCs and the components of their niche. Moreover, we will also provide an update of the therapeutic options being currently tested to disrupt the CXCL12 axes in order to target, directly or indirectly, the CSC subpopulation.

scholarly journals Mycosporine-Like Amino Acids from Red Macroalgae: UV-Photoprotectors with Potential Cosmeceutical Applications

2021 ◽  
Vol 11 (11) ◽  
pp. 5112
Author(s):  
Julia Vega ◽  
Geniane Schneider ◽  
Bruna R. Moreira ◽  
Carolina Herrera ◽  
José Bonomi-Barufi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
High Performance ◽  
Nitrogen Availability ◽  
Antioxidant Properties ◽  
Published Data ◽  
Diverse Group ◽  
Red Macroalgae ◽  
Thermo Stability ◽  
The Impact

Macroalgae belong to a diverse group of organisms that could be exploited for biomolecule application. Among the biocompounds found in this group, mycosporine-like amino acids (MAAs) are highlighted mainly due to their photoprotection, antioxidant properties, and high photo and thermo-stability, which are attractive characteristics for the development of cosmeceutical products. Therefore, here we revise published data about MAAs, including their biosynthesis, biomass production, extraction, characterization, identification, purification, and bioactivities. MAAs can be found in many algae species, but the highest concentrations are found in red macroalgae, mainly in the order Bangiales, as Porphyra spp. In addition to the species, the content of MAAs can vary depending on environmental factors, of which solar radiation and nitrogen availability are the most influential. MAAs can confer photoprotection due to their capacity to absorb ultraviolet radiation or reduce the impact of free radicals on cells, among other properties. To extract these compounds, different approaches can be used. The efficiency of these methods can be evaluated with characterization and identification using high performance liquid chromatography (HPLC), associated with other apparatus such as mass spectrometry (MS) and nuclear magnetic resonance (NMR). Therefore, the data presented in this review allow a broad comprehension of MAAs and show perspectives for their inclusion in cosmeceutical products.

scholarly journals Salvage therapy of bleeding esophageal tumor by fully covered self-expandable metallic stent: A case report

2021 ◽  
Vol 9 ◽  
pp. 2050313X2199719
Author(s):  
Sundus Bilal ◽  
Saad Muhammad Saeed ◽  
Muhammad Zeeshan Siddique ◽  
Muhammad Saqib ◽  
Shafqat Mehmood ◽  
...  
Keyword(s):  
Case Reports ◽  
Esophageal Tumor ◽  
Metallic Stent ◽  
Diverse Group ◽  
Expandable Metallic Stent ◽  
Lost To Follow Up ◽  
Expandable Metallic Stents ◽  
Tamponade Effect

The role of self-expandable metallic stents is gradually evolving for a diverse group of benign and malignant gastrointestinal tract problems, with luminal obstruction being by far the most common. Although its role in refractory variceal bleeding is well established, it has rarely been tried for tumor-related bleeding, with only a few case reports in this regard. We share our experience of successfully controlling esophageal tumor–related bleeding with the use of a fully covered self-expandable metallic stent. A 58-year-old woman with irresectable distal esophageal cancer, presented with hematemesis. Esophago-gastro-duodenoscopy revealed an obstructing esophageal tumor with diffuse oozing of blood. This was unamenable to local injection of adrenaline and hemospray; therefore, a temporary self-expandable metallic stent was parked to create a tamponade effect. This successfully stopped bleeding and the patient remained asymptomatic till discharge. However, she was lost to follow-up, and therefore, the stent was removed after a period of 5 months instead of 2 weeks.

scholarly journals Molecular characterization of Polychromophilus parasites of Scotophilus kuhlii bats in Thailand

Parasitology ◽  
2020 ◽  
pp. 1-5
Author(s):  
Chatree Chumnandee ◽  
Nawarat Pha-obnga ◽  
Oskar Werb ◽  
Kai Matuschewski ◽  
Juliane Schaer
Keyword(s):  
Blood Cells ◽  
Clinical Symptoms ◽  
Temperate Climate ◽  
Diverse Group ◽  
Malaria Parasites ◽  
Climate Zones ◽  
Haemosporidian Parasites ◽  
South And Southeast Asia ◽  
Molecular Investigation

Abstract Parasites of the haemosporidian genus Polychromophilus have exclusively been described in bats. These parasites belong to the diverse group of malaria parasites, and Polychromophilus presents the only haemosporidian taxon that infects mammalian hosts in tropical as well as in temperate climate zones. This study provides the first information of Polychromophilus parasites in the lesser Asiatic yellow bat (Scotophilus kuhlii) in Thailand, a common vespertilionid bat species distributed in South and Southeast Asia. The gametocyte blood stages of the parasites could not be assigned to a described morphospecies and molecular analysis revealed that these parasites might represent a distinct Polychromophilus species. In contrast to Plasmodium species, Polychromophilus parasites do not multiply in red blood cells and, thus, do not cause the clinical symptoms of malaria. Parasitological and molecular investigation of haemosporidian parasites of wildlife, such as the neglected genus Polychromophilus, will contribute to a better understanding of the evolution of malaria parasites.

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