2,349 results match your criteria ephemeral


Uterine transplantation: Legal and regulatory implications in England.

BJOG 2021 Sep 17. Epub 2021 Sep 17.

Department of Surgery and Cancer, Hammersmith Hospital, Imperial College London, Du Cane Road, London, W12 0NN, UK.

Uterus transplantation (UTx) is fast evolving from an experimental to a clinical procedure, combining solid organ transplantation with assisted reproductive technology. The commencement of the first human uterus transplant trial in the United Kingdom leads us to examine and reflect upon the legal and regulatory aspects closely intertwined with UTx from the process of donation to potential implications on fertility treatment and the birth of the resultant child. As the world's first ephemeral transplant, the possibility of organ restitution requires consideration and is discussed herein. Read More

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September 2021

New insight into spatial ecology of Griffon Vulture () on the Balkans provides opportunity for focusing conservation actions for a threatened social scavenger.

Biodivers Data J 2021 23;9:e71100. Epub 2021 Aug 23.

Fund for Wild Flora & Fauna, 49 Ivan Mihaylov Str., office 327, P.O.Box 78, www.fwff.org, Blagoevgrad, Bulgaria Fund for Wild Flora & Fauna, 49 Ivan Mihaylov Str., office 327, P.O.Box 78, www.fwff.org, Blagoevgrad Bulgaria.

The knowledge in the behaviour and movement of endangered species is of key importance for the precise targeting and assessing the efficiency of nature conservation actions, especially considering vultures, which explore vast areas to locate ephemeral and unpredictable food resources. Therefore, a total of 51 Griffon Vultures () from both the re-introduced population and the autochthonous Balkan Peninsula (Balkans) colonies have been tagged with GPS/GSM transmitters in recent years, in order to study their seasonal and spatial distribution. The current study presents the analysis of the high-resolution GPS location data, acquired between January 2016 and March 2021. Read More

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The role of algal blooms and community respiration in controlling the temporal and spatial dynamics of hypoxia and acidification in eutrophic estuaries.

Mar Pollut Bull 2021 Sep 9;172:112908. Epub 2021 Sep 9.

School of Marine and Atmospheric Sciences, Stony Brook University, Southampton, NY 11968, United States of America. Electronic address:

While hypoxia and acidification can be common occurrences in eutrophic coastal zones, the precise, coupled temporal and spatial dynamics of these conditions are poorly described. Here, continuous measurements of water column pH, pCO, carbonate chemistry, and dissolved oxygen (DO) concentrations were made from spring through fall across two, temperate eutrophic estuaries, western Long Island Sound (LIS) and Jamaica Bay, NY, USA. Vertical dynamics were resolved using an underway towing profiler and an automated stationary profiling unit. Read More

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September 2021

Taxon-specific sensitivities to flow intermittence reveal macroinvertebrates as potential bioindicators of intermittent rivers and streams.

Sci Total Environ 2021 Aug 31;804:150022. Epub 2021 Aug 31.

Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia. Electronic address:

As complex mosaics of lotic, lentic, and terrestrial habitats, intermittent rivers and ephemeral streams (IRES) support high biodiversity. Despite their ecological importance, IRES are poorly represented in routine monitoring programs, but recent recognition of their considerable-and increasing-spatiotemporal extent is motivating efforts to better represent IRES in ecological status assessments. We examine response patterns of aquatic macroinvertebrate communities and taxa to flow intermittence (FI) across three European climatic regions. Read More

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Reef manta rays forage on tidally driven, high density zooplankton patches in Hanifaru Bay, Maldives.

PeerJ 2021 23;9:e11992. Epub 2021 Aug 23.

Queensland Biosciences Precinct, CSIRO Oceans and Atmosphere, St Lucia, Queensland, Australia.

Manta rays forage for zooplankton in tropical and subtropical marine environments, which are generally nutrient-poor. Feeding often occurs at predictable locations where these large, mobile cartilaginous fishes congregate to exploit ephemeral productivity hotspots. Investigating the zooplankton dynamics that lead to such feeding aggregations remains a key question for understanding their movement ecology. Read More

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Mindful of Personality Trait Change: Are Treatment Effects on Personality Trait Change Ephemeral and Attributable to Changes in States?

J Pers 2021 Sep 6. Epub 2021 Sep 6.

University of Southern California.

Objective: Are treatment effects on personality trait change ephemeral and attributable to change in clinical states? Data of an intervention study was used to examine if change in clinical states (e.g., stress or depression) accounts for change in personality traits and to test whether both changes in traits and clinical states were independently associated with substance use. Read More

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September 2021

Biodegradable Small-Scale Swimmers for Biomedical Applications.

Adv Mater 2021 Sep 3:e2102049. Epub 2021 Sep 3.

Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, Zurich, CH-8092, Switzerland.

Most forms of biomatter are ephemeral, which means they transform or deteriorate after a certain time. From this perspective, implantable healthcare devices designed for temporary treatments should exhibit the ability to degrade and either blend in with healthy tissues, or be cleared from the body with minimal disruption after accomplishing their designated tasks. This topic is currently being investigated in the field of biomedical micro- and nanoswimmers. Read More

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September 2021

Conspicuous Smooth and White Egg-Shaped Sulfur Structures on a Deep-Sea Hydrothermal Vent Formed by Sulfide-Oxidizing Bacteria.

Microbiol Spectr 2021 Sep 1:e0095521. Epub 2021 Sep 1.

Max Planck Institute for Marine Microbiologygrid.419529.2, Bremen, Germany.

Conspicuous egg-shaped, white, and smooth structures were observed at a hydrothermal vent site in the Guaymas Basin, Gulf of California. The gelatinous structures decomposed within hours after sampling. Scanning electron microscopy (SEM) and light microscopy showed that the structure consisted of filaments of less than 0. Read More

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September 2021

Light dominates the diurnal emissions of herbivore-induced volatiles in wild tobacco.

BMC Plant Biol 2021 Aug 30;21(1):401. Epub 2021 Aug 30.

Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745, Jena, Germany.

Background: Timing is everything when it comes to the fitness outcome of a plant's ecological interactions, and accurate timing is particularly relevant for interactions with herbivores or mutualists that are based on ephemeral emissions of volatile organic compounds. Previous studies of the wild tobacco N. attenuata have found associations between the diurnal timing of volatile emissions, and daytime predation of herbivores by their natural enemies. Read More

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Crosslinker-modified nucleic acid probes for improved target identification and biomarker detection.

RSC Chem Biol 2021 Apr 22;2(2):410-422. Epub 2021 Feb 22.

Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University Krijgslaan 281 Building S4 9000 Ghent Belgium +32-9-264-49-98 +32-9-264-44-72.

Understanding the intricate interaction pattern of nucleic acids with other molecules is essential to gain further insight in biological processes and disease mechanisms. To this end, a multitude of hybridization-based assays have been designed that rely on the non-covalent recognition between complementary nucleic acid sequences. However, the ephemeral nature of these interactions complicates straightforward analysis as low efficiency and specificity are rule rather than exception. Read More

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Immunoinformatics Approach to Design Multi-Epitope- Subunit Vaccine against Bovine Ephemeral Fever Disease.

Vaccines (Basel) 2021 Aug 19;9(8). Epub 2021 Aug 19.

Discipline of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore 452020, India.

Bovine ephemeral fever virus (BEFV) is an overlooked pathogen, recently gaining widespread attention owing to its associated enormous economic impacts affecting the global livestock industries. High endemicity with rapid spread and morbidity greatly impacts bovine species, demanding adequate attention towards BEFV prophylaxis. Currently, a few suboptimum vaccines are prevailing, but were confined to local strains with limited protection. Read More

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Is Plant Life-History of Biseasonal Germination Consistent in Response to Extreme Precipitation?

Plants (Basel) 2021 Aug 10;10(8). Epub 2021 Aug 10.

State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.

Future climate is projected to increase in the intensity and frequency of extreme precipitation events, and the resulting ecological consequences are often more serious than those of normal precipitation events. In particular, in desert ecosystems, due to the low frequency and strong fluctuation of extreme precipitation, the destructive consequences for desert plants caused by extreme precipitation have not received enough attention for some time. Based on statistics of extreme precipitation events (1965-2018) in the Gurbantunggut Desert, we investigated the effects of extreme precipitation (+0%, CK; +50%, W1; +100%, W2; +200%, W3; maintenance of field capacity, W4) on the plant life-history of the spring-germinated (SG) and autumn-germinated (AG) ephemeral plant by monitoring seedling emergence, survival, phenology, organ size, biomass accumulation, and allocation. Read More

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On the Vernacular Language Games of an Antagonistic Online Subculture.

Front Big Data 2021 10;4:718368. Epub 2021 Aug 10.

Department of Media Studies, University of Amsterdam, Amsterdam, Netherlands.

In this paper we develop an empirical, big data approach to analyze how alt-right vernacular concepts (such as and ) were used on the notorious anonymous and ephemeral imageboard 4chan/pol/and the fan wiki Encyclopedia Dramatica. While 4chan/pol/is broadly regarded as an influential source of many of the web's most successful memes such as Pepe the Frog, Encyclopedia Dramatica functions as a kind of satirical Wikipedia for this meme subculture, written in high concept and highly offensive vernacular style. While the site's affordances make them distinct, they are connected by a subcultural style and politics that has recently become increasingly connected with violent right-wing activism, forming a loose subcultural language community. Read More

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Formalized classification of ephemeral wetland vegetation (Isoëto-Nanojuncetea class) in Poland (Central Europe).

PeerJ 2021 10;9:e11703. Epub 2021 Aug 10.

Institute of Biology, University of Szczecin, Szczecin, Poland.

Formalized classification of the class Isoëto-Nanojuncetea has not been performed in Poland. We used 69,562 relevés stored in Polish Vegetation Database. Based on the literature and expert knowledge we selected 63 diagnostic species for the Isoëto-Nanojuncetea class. Read More

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Refining the picture: new records to the lichen biota of Italy.

MycoKeys 2021 11;82:97-137. Epub 2021 Aug 11.

Department of Life Sciences, University of Trieste, Via L. Giorgieri 10, 34127 Trieste, Italy Swedish University of Agricultural Sciences Uppsala Sweden.

Based on the analysis of both historical and recent collections, this paper reports an annotated list of taxa which are new to the lichen biota of Italy or of its administrative regions. Specimens were identified using a dissecting and a compound microscope; routine chemical spot tests and standardized thin-layer chromatography (TLC or HPTLC). The list includes 225 records of 153 taxa. Read More

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The paradoxes of love in the Spanish family: a sociological approach.

F1000Res 2021 21;10:627. Epub 2021 Jul 21.

Department of Sociology I, University of Alicante, Alicante, E-03080, Spain.

This article defines the Spanish family in the context of the "Mediterranean model" and the "individualization society". The former is characterised by strong social interrelationships between family members and their emotional ties, while the latter is defined by the separateness of citizens and by institutionalising the basis of society in individuals rather than in the family. The work also describes how modern forms of love, both romantic and confluent, are institutionalized in this society, discussing if they coexist or not, how they exist, and which is the dominant form. Read More

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Cannibalism and Necrophagy Promote a Resource Loop and Benefit Larval Development in Insects of Temporary Waters.

Insects 2021 Jul 20;12(7). Epub 2021 Jul 20.

Department of Environmental Biology, Sapienza University of Rome, 00185 Roma, Italy.

Temporary aquatic habitats are contingent on the allochthonous inputs of plant and animal detritus, whose quality and availability can significantly affect the species developing in these habitats. Although animal detritus (i.e. Read More

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Inverted microbial community stratification and spatial-temporal stability in hypersaline anaerobic sediments from the S'Avall solar salterns.

Syst Appl Microbiol 2021 Jul 15;44(5):126231. Epub 2021 Jul 15.

Marine Microbiology Group, Department of Animal and Microbial Biodiversity, Mediterranean Institute for Advanced Studies (IMEDEA UIB-CSIC), Esporles, Spain.

The anaerobic hypersaline sediments of an ephemeral pond from the S'Avall solar salterns constituted an excellent study system because of their easy accessibility, as well as the analogy of their microbial assemblages with some known deep-sea hypersaline anaerobic brines. By means of shotgun metagenomics and 16S rRNA gene amplicon sequencing, the microbial composition of the sediment was shown to be stable in time and space. The communities were formed by prokaryote representatives with a clear inferred anaerobic metabolism, mainly related to the methane, sulfur and nitrate cycles. Read More

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Commentary: Ephemeral Versus Long-Lived Surgical Metrics: Time for A Change.

Semin Thorac Cardiovasc Surg 2021 Jul 23. Epub 2021 Jul 23.

Department of Cardiothoracic Surgery, New York University Langone Health, New York, NY. Electronic address:

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African elephants can detect water from natural and artificial sources via olfactory cues.

Anim Cogn 2021 Jul 22. Epub 2021 Jul 22.

Department of Zoology and Entomology, Mammal Research Institute, University of Pretoria, Pretoria, South Africa.

Water is vital for mammals. Yet, as ephemeral sources can be difficult to find, it raises the question, how do mammals locate water? Elephants (Loxodonta africana) are water-dependent herbivores that possess exceptional olfactory capabilities, and it has been suggested that they may locate water via smell. However, there is no evidence to support this claim. Read More

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The neuroendocrinology of stress: the stress-related continuum of chronic disease development.

Mol Psychiatry 2021 Jul 21. Epub 2021 Jul 21.

University Research Institute of Maternal and Child Health and Precision Medicine and UNESCO Chair on Adolescent Health Care, National and Kapodistrian University of Athens, Medical School, Aghia Sophia Children's Hospital, Athens, Greece.

Stress is defined as a state of threatened homeodynamic balance by a wide range of intrinsic or extrinsic, real or perceived challenges or stimuli, defined as stressors. To preserve this optimal homeodynamic state within a physiologic range, organisms have developed a highly sophisticated system, the stress system, which serves self-regulation and adaptability of the organism by energy redirection according to the current needs. Repeated, ephemeral, and motivating stress states lead to adaptive responses and response habituations, being fairly beneficial; in contrast, inadequate, aversive, excessive, or prolonged stress may surpass the regulatory capacity and adjustive resources of the organism and produce maladaptive responses and a chronically altered homeodynamic state associated with compromised mental and physical health and life expectancy. Read More

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Persistence and spread of tetracycline resistance genes and microbial community variations in the soil of animal corrals in a semi-arid planted forest.

FEMS Microbiol Ecol 2021 07;97(8)

Department of Natural Resources, Gilat Research Center, Agriculture Research Organization, Mobile, Post Negev 8531100, Israel.

At the spring, goat and sheep herds are transferred to planted forests, in a semi-arid region in the northern Negev Desert, Israel, to reduce herbaceous biomass and, fire risk. The herds are held overnight in corrals for about 4 months, enriching the soil with organic matter and nitrogen. This research examined the effect of these enrichments on soil bacterial community structure (BCS) and the abundance of tetracycline resistance genes (TRGs) in active and abandoned corrals (1-10-years-old). Read More

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Ecological and environmental context shape the differential effects of a facilitator in its native and invaded ranges.

Ecology 2021 Jul 16:e03478. Epub 2021 Jul 16.

Department of Zoology, University of British Columbia, 4200-6270 University Boulevard, Vancouver, British Columbia, V6T 1Z4, Canada.

Invasive species often exhibit disproportionately strong negative effects in their introduced range compared to their native range, and much research has been devoted to understanding the role of shared evolutionary history, or lack thereof, in driving these differences. Less studied is whether introduced species, particularly those that are important as facilitators in their native range, have persistent positive effects in their invaded range despite a lack of a shared evolutionary history with the invaded community. Here, we manipulated the density of a habitat-forming facilitator, the high intertidal acorn barnacle Balanus glandula, factorially with herbivore density in its native range (Bluestone Point, British Columbia, Canada) and invaded range (Punta Ameghino, Chubut Province, Argentina) to determine how this facilitator differentially affects associated species at these two locations. Read More

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The role of wildlife in the epidemiology and control of Foot-and-mouth-disease And Similar Transboundary (FAST) animal diseases: A review.

Transbound Emerg Dis 2021 Jul 15. Epub 2021 Jul 15.

European Commission for the Control of Foot-and-Mouth Disease, Rome, Italy.

Transboundary Animal Diseases (TADs) are notifiable diseases which are highly transmissible and have the potential for rapid spread regardless of national borders. Many TADs are shared between domestic animals and wildlife, with the potential to affect both livestock sector and wildlife conservation and eventually, public health in the case of zoonosis. The European Commission for the Control of Foot-and-Mouth Disease (EuFMD), a commission of the Food and Agriculture Organization of the United Nations (FAO), has grouped six TADs as 'Foot-and-mouth disease (FMD) And Similar Transboundary animal diseases' (FAST diseases). Read More

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A hitchhiker guide to manta rays: Patterns of association between Mobula alfredi, M. birostris, their symbionts, and other fishes in the Maldives.

PLoS One 2021 14;16(7):e0253704. Epub 2021 Jul 14.

The Manta Trust, Dorset, United Kingdom.

Despite being among the largest and most charismatic species in the marine environment, considerable gaps remain in our understanding of the behavioural ecology of manta rays (Mobula alfredi, M. birostris). Manta rays are often sighted in association with an array of smaller hitchhiker fish species, which utilise their hosts as a sanctuary for shelter, protection, and the sustenance they provide. Read More

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Pseudoprogression with Neoadjuvant Immunotherapy for Cutaneous Melanoma.

Case Rep Oncol 2021 May-Aug;14(2):881-885. Epub 2021 Jun 17.

Department of Medical Oncology, Hospital Israelita Albert Einstein, São Paulo, Brazil.

Immune checkpoint inhibitors (ICI) have drastically changed the landscape of metastatic melanoma management, thus significantly improving survival. Clinically, assessing treatment response may be challenging in a portion of cases due to a massive influx of immune cells into the tumor microenvironment, causing a transient increase in the target lesion size. This phenomenon, coined pseudoprogression, can occur in 5-10% of metastatic patients, and it is commonly followed by a tumor regression. Read More

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Ephemeral history of the three-bladed tracheostomy dilator.

Authors:
A Mudry

Eur Ann Otorhinolaryngol Head Neck Dis 2021 Jul 5. Epub 2021 Jul 5.

Department of Otolaryngology, Head & Neck Surgery, Stanford University School of Medicine, avenue de la Gare 6, 1003 Lausanne, Switzerland. Electronic address:

Tracheostomy remains a topical surgical procedure. The history of tracheostomy is marked by the development of various instruments, including the three-bladed tracheostomy dilator from the middle of the 19th century. The purpose of this historical note is to recall the use of this unusual instrument. Read More

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Finding potential inhibitors against RNA-dependent RNA polymerase (RdRp) of bovine ephemeral fever virus (BEFV): an - study.

J Biomol Struct Dyn 2021 Jul 8:1-19. Epub 2021 Jul 8.

Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India.

The bovine ephemeral fever virus (BEFV) is an enzootic agent that affects millions of bovines and causes major economic losses. Though the virus is seasonally reported with a very high morbidity rate (80-100%) from African, Australian, and Asiatic continents, it remains a neglected pathogen in many of its endemic areas, with no proper therapeutic drugs or vaccines presently available for treatment. The RNA-dependent RNA polymerase (RdRp) catalyzes the viral RNA synthesis and is an appropriate candidate for antiviral drug developments. Read More

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Bilateral post fever retinitis with retinal vascular occlusions following severe acute respiratory syndrome corona virus (SARS-CoV2) infection.

Ocul Immunol Inflamm 2021 Jul 6:1-6. Epub 2021 Jul 6.

Department of Cornea and Refractive Surgery, Narayana Nethralaya, Bangalore, India.

: As the world fights the pandemic caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), several reports of retinal manifestations of the disease are emerging. Post fever retinitis is a well reported ocular inflammatory reaction to multiple invasive agents, be it virus, bacteria or other microbial agent.: We report an interesting case of bilateral multifocal retinitis with multiple vascular occlusions in a patient, three weeks after a febrile illness. Read More

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The energetics of social signaling during roost location in Spix's disc-winged bats.

J Exp Biol 2021 07 19;224(14). Epub 2021 Jul 19.

Department of Biological Sciences, State University of New York at Oswego, Oswego, NY 13126-3599, USA.

Long-term social aggregations are maintained by multiple mechanisms, including the use of acoustic signals, which may nonetheless entail significant energetic costs. To date, however, no studies have gauged whether there are significant energetic costs to social call production in bats, which heavily rely on acoustic communication for a diversity of social tasks. We measured energetic expenditure during acoustic signaling in Spix's disc-winged bats (Thyroptera tricolor), a species that commonly uses contact calls to locate the ephemeral furled leaves that they use for roosting. Read More

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