16,847 results match your criteria resources nature

Changes in plant nutrient utilization during ecosystem recovery after wildfire.

J Environ Manage 2021 Jun 21;295:112994. Epub 2021 Jun 21.

School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, 100083, PR China. Electronic address:

Wildfire is the primary natural disturbance in boreal forest ecosystems. It substantially changes soil nutrient conditions and plant nutrient dynamics. After a wildfire, various plant strategies of nutrient utilization are fundamental to ecosystem recovery processes. Read More

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Burnout among medical students of a medical college in Kathmandu; A cross-sectional study.

PLoS One 2021 24;16(6):e0253808. Epub 2021 Jun 24.

Department of Emergency Medicine, Dr. Iwamura Memorial Hospital, Bhaktapur, Nepal.

Background: Medical students are more prone to burnout than the general population and students of other faculties due to the demanding nature of medical education with limited time and resources. Burnout has a negative impact on the academics and personal life of the students which can continue into their professional life and ultimately hamper patient care. The purpose of this study is to determine the prevalence of burnout among medical students of a medical college and find its association with age, gender, and year of study. Read More

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A prospective examination of neighborhood social and cultural cohesion and parenting processes on ethnic-racial identity among U.S. Mexican adolescents.

Dev Psychol 2021 May;57(5):783-795

School of Social and Family Dynamics, Arizona State University.

Neighborhood social processes may have important implications for parenting processes and ethnic-racial identity (ERI) processes and content in adolescence. Past research suggests that adolescents whose parents engaged in more cultural socialization, an important aspect of parental racial socialization, had higher levels of ERI processes and content. Parenting, however, is also situated within neighborhood contexts and can be influenced by resources available in neighborhoods. Read More

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Construction of Supercapacitor-Based Ionic Diodes with Adjustable Bias Directions by Using Poly(ionic liquid) Electrolytes.

Adv Mater 2021 Jun 24:e2100887. Epub 2021 Jun 24.

Laboratory of Clean Energy Chemistry and Materials, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.

The newly emerging supercapacitor-diode (CAPode), integrating the characteristics of a diode into an electrical-double-layer capacitor, can be employed to extend conventional supercapacitors to new technological applications and may play a crucial role in grid stabilization, signal propagation, and logic operations. However, the reported CAPodes have only been able to realize charge storage in the positive-bias direction. Here, bias-direction-adjustable CAPodes realized by using a polycation-based ionic liquid (IL) or a polyanion-based IL as electrolyte in an asymmetric carbon-based supercapacitor architecture are proposed. Read More

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Premature Professionalisation or Early Engagement? Examining Practise in Football Player Pathways.

Front Sports Act Living 2021 7;3:660167. Epub 2021 Jun 7.

Faculty of Science and Health, School of Health and Human Performance, Dublin City University, Dublin, Ireland.

There is a growing debate, both in the academic and sporting worlds, about the most appropriate pathway for high potential young players in sport. In this regard, there has been a considerable focus on the age of selection into structured talent development pathways and the nature of the experience once players have been recruited. Given the economic and reputational currency associated with developing professional footballers in particular, it is unsurprising that professional football clubs continue to invest significant financial resources into their academy structures. Read More

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Spiking Neural Network for Fourier Transform and Object Detection for Automotive Radar.

Front Neurorobot 2021 7;15:688344. Epub 2021 Jun 7.

Department of Informatics, Technical University of Munich, Munich, Germany.

The development of advanced autonomous driving applications is hindered by the complex temporal structure of sensory data, as well as by the limited computational and energy resources of their on-board systems. Currently, neuromorphic engineering is a rapidly growing field that aims to design information processing systems similar to the human brain by leveraging novel algorithms based on spiking neural networks (SNNs). These systems are well-suited to recognize temporal patterns in data while maintaining a low energy consumption and offering highly parallel architectures for fast computation. Read More

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Limited potential for bird migration to disperse plants to cooler latitudes.

Nature 2021 Jun 23. Epub 2021 Jun 23.

Global Change Research Group, Mediterranean Institute of Advanced Studies (CSIC-UIB), Esporles, Spain.

Climate change is forcing the redistribution of life on Earth at an unprecedented velocity. Migratory birds are thought to help plants to track climate change through long-distance seed dispersal. However, seeds may be consistently dispersed towards cooler or warmer latitudes depending on whether the fruiting period of a plant species coincides with northward or southward migrations. Read More

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Impact of the Global COVID-19 Pandemic on the Incidence, Presentation, and Management of Pediatric Appendicitis: Lessons Learned from the First Wave.

Eur J Pediatr Surg 2021 Jun 23. Epub 2021 Jun 23.

Department of Pediatric Surgery, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt (Main), Germany.

The fast-evolving nature of the coronavirus disease 2019 (COVID-19) pandemic has led to unprecedented clinical, logistical, and socioeconomical challenges for health-care systems worldwide. While several studies have analyzed the impact on the presentation and management of acute appendicitis (AA) in the adult population, there is a relative paucity of similar research in pediatric patients with AA. To date, there is some evidence that the incidence of simple AA in children may have decreased during the first lockdown period in spring 2020, whereas the number of complicated AA cases remained unchanged or increased slightly. Read More

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Groundwater dependence of riparian woodlands and the disrupting effect of anthropogenically altered streamflow.

Proc Natl Acad Sci U S A 2021 Jun;118(25)

School of Earth and Environmental Sciences, Cardiff University, CF10 3AT Cardiff, United Kingdom.

Riparian ecosystems fundamentally depend on groundwater, especially in dryland regions, yet their water requirements and sources are rarely considered in water resource management decisions. Until recently, technological limitations and data gaps have hindered assessment of groundwater influences on riparian ecosystem health at the spatial and temporal scales relevant to policy and management. Here, we analyze Sentinel-2-derived normalized difference vegetation index (NDVI; = 5,335,472 observations), field-based groundwater elevation ( = 32,051 observations), and streamflow alteration data for riparian woodland communities ( = 22,153 polygons) over a 5-y period (2015 to 2020) across California. Read More

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Impact of COVID-19 lockdown on the spectrum of trauma patients at a major trauma center in central India: A retrospective observational study.

Int J Crit Illn Inj Sci 2021 Jan-Mar;11(1):25-28. Epub 2021 Mar 27.

Department of Surgery, Government Medical College, Nagpur, Maharashtra, India.

Context: A total lockdown was announced in India from March 25 to May 31 in four phases in response to the COVID-19 pandemic. This study aimed to study the impact of this national lockdown on the volume and the nature of injuries in patients admitted during this period at a major trauma center in central India.

Methods: This is a retrospective descriptive study of prospectively collected data which were collected from the hospital records. Read More

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Verrucomicrobial methanotrophs grow on diverse C3 compounds and use a homolog of particulate methane monooxygenase to oxidize acetone.

ISME J 2021 Jun 22. Epub 2021 Jun 22.

Department of Biological Sciences and Biotechnology, Chungbuk National University, 1 Chungdae-ro, Seowon-Gu, Cheongju, 28644, Republic of Korea.

Short-chain alkanes (SCA; C2-C4) emitted from geological sources contribute to photochemical pollution and ozone production in the atmosphere. Microorganisms that oxidize SCA and thereby mitigate their release from geothermal environments have rarely been studied. In this study, propane-oxidizing cultures could not be grown from acidic geothermal samples by enrichment on propane alone, but instead required methane addition, indicating that propane was co-oxidized by methanotrophs. Read More

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The landscape of biobanks in Poland-characteristics of Polish biobanking units at the beginning of BBMRI.pl organization.

J Transl Med 2021 Jun 22;19(1):267. Epub 2021 Jun 22.

Department of Histology and Embryology, Center for Biostructure Research, Medical University of Warsaw, 61 Żwirki i Wigury St., 02-091, Warsaw, Poland.

Background: Biobanking is an area of scientific activity that is growing in strength and importance. The variety of collections combining biological samples and medical scientific information makes biobanking an indispensable tool in the development of modern medicine. In 2016, Poland, a country with one of the largest populations in Europe, joined the Biobanking and BioMolecular resources Research Infrastructure-European Research Infrastructure Consortium (BBMRI-ERIC) to facilitate access to quality-defined human disease-relevant biological resources. Read More

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Dispersal ability, habitat characteristics, and sea-surface circulation shape population structure of Cingula trifasciata (Gastropoda: Rissoidae) in the remote Azores Archipelago.

BMC Ecol Evol 2021 06 22;21(1):128. Epub 2021 Jun 22.

Institute for Integrative Nature Conservation Research, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria.

Background: In the marine realm, dispersal ability is among the major factors shaping the distribution of species. In the Northeast Atlantic Ocean, the Azores Archipelago is home to a multitude of marine invertebrates which, despite their dispersal limitations, maintain gene flow among distant populations, with complex evolutionary and biogeographic implications. The mechanisms and factors underlying the population dynamics and genetic structure of non-planktotrophic gastropods within the Azores Archipelago and related mainland populations are still poorly understood. Read More

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Single-arm oncology trials and the nature of external controls arms.

J Comp Eff Res 2021 Jun 22. Epub 2021 Jun 22.

Department of Medicine, Division of Pharmacoepidemiology & Pharmacoeconomics, Brigham & Women's Hospital, Boston, MA 02120, USA.

Single-arm trials with external control arms (ECAs) have gained popularity in oncology. ECAs may consist of primary data from previous trials, electronic health records (EHRs) or aggregate data from the literature. We sought to provide a description of how such studies achieve similarity of patients, comparability of data quality and outcome assessment. Read More

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Whimbrel populations differ in trans-atlantic pathways and cyclone encounters.

Sci Rep 2021 Jun 21;11(1):12919. Epub 2021 Jun 21.

Canadian Wildlife Service, Environment and Climate Change Canada, Yellowknife, NT, Canada.

Each year hundreds of millions of birds cross the Atlantic Ocean during the peak of tropical cyclone activity. The extent and consequences of migrant-storm interactions remain unknown. We tracked whimbrels from two populations (Mackenzie Delta; Hudson Bay) to examine overlap between migration routes and storm activity and both the frequency and consequence of storm encounters. Read More

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The effect of COVID19 pandemic restrictions on an urban rodent population.

Sci Rep 2021 06 21;11(1):12957. Epub 2021 Jun 21.

School of Life and Environmental Sciences, The University of Sydney, Faculty of Science, Sydney, NSW, 2006, Australia.

Shortly after the enactment of restrictions aimed at limiting the spread of COVID-19, various local government and public health authorities around the world reported an increased sighting of rats. Such reports have yet to be empirically validated. Here we combined data from multi-catch rodent stations (providing data on rodent captures), rodent bait stations (providing data on rodent activity) and residents' complaints to explore the effects of a six week lockdown period on rodent populations within the City of Sydney, Australia. Read More

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Assessment of intention to use contraceptive methods with spatial distributions and associated factors among women in Ethiopia: evidence from EDHS 2016.

Arch Public Health 2021 Jun 21;79(1):109. Epub 2021 Jun 21.

Department of Health Informatics, School of Public Health, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, South West, Ethiopia.

Background: Modern contraceptive methods have immense influences on the health of mothers and their children. Using contraceptive methods is seen to control family size and unnecessary pregnancies. Considering different factors like resources and various cultural aspects, assessing the intention to use contraception might bring areas with these problems into the light for intervention. Read More

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Micro(nano)plastics as an emerging risk factor to the health of amphibian: A scientometric and systematic review.

Chemosphere 2021 Jun 14;283:131090. Epub 2021 Jun 14.

Biological Research Laboratory, Goiano Federal Institute, Goiano Federal Institute, Urutaí, GO, Brazil; Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí, GO, Brazil.

Although the toxicity of microplastics (MPs) and nanoplastics (NPs) is recognized at different trophic levels, our know-how about their effects on amphibians is limited. Thus, we present and discuss the current state on studies involving amphibians and plastic particles, based on a broad approach to studies published in the last 5 years. To search for the articles, the ISI Web of Science, ScienceDirect, and Scopus databases were consulted, using different descriptors related to the topic of study. Read More

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Conservation aquaculture as a tool for imperiled marine species: Evaluation of opportunities and risks for Olympia oysters, Ostrea lurida.

PLoS One 2021 21;16(6):e0252810. Epub 2021 Jun 21.

Department of Environmental Science and Policy, University of California-Davis, Davis, California, United States of America.

Conservation aquaculture is becoming an important tool to support the recovery of declining marine species and meet human needs. However, this tool comes with risks as well as rewards, which must be assessed to guide aquaculture activities and recovery efforts. Olympia oysters (Ostrea lurida) provide key ecosystem functions and services along the west coast of North America, but populations have declined to the point of local extinction in some estuaries. Read More

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Optimizing conservation in species-specific agricultural landscapes.

Conserv Biol 2021 Jun 21. Epub 2021 Jun 21.

Warnell School of Forestry and Natural Resources, University of Georgia, 180 East Green Street, Athens, GA, 30602, USA.

Recovery of grassland birds in agricultural landscapes is a global imperative. Agricultural landscapes are complex, and the value of resource patches may vary substantially among species. The spatial extent at which landscape features affect populations (i. Read More

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Evaluation of trace elements pollution in deposited dust on residential areas and agricultural lands around Pb/Zn mineral areas using modified pollution indices.

J Environ Health Sci Eng 2021 Jun 11;19(1):753-769. Epub 2021 Mar 11.

Department of Environmental Management and Planning, Graduate Faculty of Environment, Tehran University, Tehran, Iran.

Dust deposited on residential and agricultural lands can have serious consequences for the ecosystem when toxic trace elements are present. This study aimed to assess the ecological risk of the trace elements found in the deposited dust around the Mehdi Abad Pb/Zn mine, Yazd, Iran, using several modified pollution indices. The dust samples were collected by the grid method and a Marble Dust Collector (MDCO) sampler to evaluate the concentration of thirty trace elements: nickel (Ni), lead (Pb), barium (Ba), beryllium (Be), chromium (Cr), copper (Cu), dysprosium (Dy), lanthanum (La), lithium (Li), niobium (Nb), tin (Sn), neodymium (Nd), praseodymium (Pr), rubidium (Rb), Ferrum (Fe), sulfur (S), selenium (Se), strontium (Sr), tantalum (Ta), terbium (Tb), zirconium (Zr), tellurium (Te), thorium (Th), titanium (Ti), uranium (U), vanadium (V), yttrium (Y), ytterbium (Yb), thulium (Tm), and cobalt (Co). Read More

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A bioactive compound isolated from Duku ( Corr) fruit peels exhibits cytotoxicity against T47D cell line.

F1000Res 2020 6;9. Epub 2020 Jan 6.

Departement of Biology, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyaka, 55281, Indonesia.

Breast cancer is a major health problem for women globally. Many attempts have been promoted to cure cancer by finding new anticancer medicines from natural resources. Despite the richness of biodiversity discovered, there are some natural resources that remain unexplored. Read More

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January 2020

Informational needs related to aspirin prophylactic therapy amongst pregnant women at risk of preeclampsia - A qualitative study.

Pregnancy Hypertens 2021 Jun 12;25:161-168. Epub 2021 Jun 12.

University of Twente, BMS Faculty, Health Technology and Services Research (HTSR), Netherlands.

Objective: Despite being key to reducing the occurrence of pre-eclampsia in high-risk women, adherence to aspirin prophylaxis is low, reflecting multifactorial challenges faced by pregnant women. It is therefore important to understand the barriers and facilitators of aspirin adherence in pregnancy. This sub-analysis of a qualitative study conducted to better understand barriers and facilitators of aspirin adherence was set to describe informational needs related to aspirin use in pregnancy. Read More

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Immobilization of roselle anthocyanins into polyvinyl alcohol/hydroxypropyl methylcellulose film matrix: Study on the interaction behavior and mechanism for better shrimp freshness monitoring.

Int J Biol Macromol 2021 Jun 16. Epub 2021 Jun 16.

College of Food Science and Technology, Hainan Tropical Ocean University, Sanya 572022, China. Electronic address:

The roselle anthocyanin extracts (RAE) were immobilized into polyvinyl alcohol (PVA)/hydroxypropyl methylcellulose (HPMC) film matrix, their interaction behavior and mechanism was fully understood for better shrimp freshness monitoring. Structural characterizations revealed RAE was firmly immobilized PVA/HPMC matrix by hydrogen bonds. With increasing RAE contents, dramatic increases of film thickness (from 15. Read More

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A new Silurian fish close to the common ancestor of modern gnathostomes.

Curr Biol 2021 Jun 12. Epub 2021 Jun 12.

Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China; CAS Center for Excellence in Life and Paleoenvironment, Beijing 100044, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:

The Silurian Period occupies a pivotal stage in the unfolding of key evolutionary events, including the rise of jawed vertebrates. However, the understanding of this early diversification is often hampered by the patchy nature of the Silurian fossil record, with the articulated specimens of jawed vertebrates only known in isolated localities, most notably Qujing, Yunnan, China. Here, we report a new Silurian maxillate placoderm, Bianchengichthys micros, from the Ludlow of Chongqing, with a near-complete dermatoskeleton preserved in articulation. Read More

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Empirical abundance distributions are more uneven than expected given their statistical baseline.

Ecol Lett 2021 Jun 18. Epub 2021 Jun 18.

Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL, USA.

Exploring and accounting for the emergent properties of ecosystems as complex systems is a promising horizon in the search for general processes to explain common ecological patterns. For example the ubiquitous hollow-curve form of the species abundance distribution is frequently assumed to reflect ecological processes structuring communities, but can also emerge as a statistical phenomenon from the mathematical definition of an abundance distribution. Although the hollow curve may be a statistical artefact, ecological processes may induce subtle deviations between empirical species abundance distributions and their statistically most probable forms. Read More

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Transcriptome analysis reveals the inhibitory nature of high nitrate during adventitious roots formation in the apple rootstock.

Physiol Plant 2021 Jun 18. Epub 2021 Jun 18.

College of Horticulture, Yangling Subsidiary Center Project of the National Apple Improvement Center, Northwest Agriculture & Forestry University, Yangling, China.

In the process of vegetative propagation of apple rootstocks, the development of adventitious roots (ARs) has crucial importance. Nitrate is an essential nutrient necessary for plant growth; however, the inhibitory effect of high nitrate on ARs formation has not been explored. The physiological and molecular mechanisms underlying ARs inhibition were examined in this study. Read More

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When are hypotheses useful in ecology and evolution?

Ecol Evol 2021 Jun 25;11(11):5762-5776. Epub 2021 Mar 25.

Forest Biodiversity Research Network Department of Forest Ecosystems and Society Oregon State University Corvallis OR USA.

Research hypotheses have been a cornerstone of science since before Galileo. Many have argued that hypotheses (1) encourage discovery of mechanisms, and (2) reduce bias-both features that should increase transferability and reproducibility. However, we are entering a new era of big data and highly predictive models where some argue the hypothesis is outmoded. Read More

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Revisiting Ophidiomycosis (Snake Fungal Disease) After a Decade of Targeted Research.

Front Vet Sci 2021 31;8:665805. Epub 2021 May 31.

Department of Pathobiology, University of Guelph, Guelph, ON, Canada.

Emerging infectious diseases (EIDs) are typically characterized by novelty (recent detection) and by increasing incidence, distribution, and/or pathogenicity. Ophidiomycosis, also called snake fungal disease, is caused by the fungus (formerly "). Ophidiomycosis has been characterized as an EID and as a potential threat to populations of Nearctic snakes, sparking over a decade of targeted research. Read More

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