177,029 results match your criteria season


Meliponinae and Apis mellifera honey in southern Brazil: Physicochemical characterization and determination of pesticides.

Food Chem 2021 May 24;363:130175. Epub 2021 May 24.

Post-graduate Program in Food Engineering and Science, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul State 96201-900, Brazil. Electronic address:

This study evaluated the physicochemical parameters and the occurrence of pesticides in multi-flower honey produced by six species of Meliponinae and Apis mellifera and collected in different seasons, floral species and sites in southern Brazil. Meliponinae honey were found to exhibit higher moisture, free acidity and sucrose concentration and lower concentration of reducing sugars than the standard of Apis mellifera honey in Brazil. Regarding Apis mellifera honey, reducing sugars and sucrose did not comply with the legislation. Read More

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Integrated mechanistic and data-driven modeling for risk assessment of greenhouse gas production in an urbanized river system.

J Environ Manage 2021 Jun 9;294:112999. Epub 2021 Jun 9.

Department of Animal Sciences, Ghent University, Gent, Belgium.

Surrounded by intense anthropogenic activities, urban polluted rivers have increasingly been reported as a significant source of greenhouse gases (GHGs). However, unlike pollution and climate change, no integrated urban water models have investigated the GHG production in urban rivers due to system complexity. In this study, we proposed a novel integrated framework of mechanistic and data-driven models to qualitatively assess the risks of GHG accumulation in an urban river system in different water management interventions. Read More

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Assessment and management of soil erosion in the hilltop mining dominated catchment using GIS integrated RUSLE model.

J Environ Manage 2021 Jun 9;294:112987. Epub 2021 Jun 9.

Central Soil Salinity Research Institute, Canning, South 24-Paragana, West Bengal, India. Electronic address:

The Saranda forest region, which is well known for its biodiversity in India, is now confronted by rapid socio-economic development, particularly the hilltop mining activities. Hilltop mining areas of this region have always been responsible for producing excessive soil erosion in the associated river basin. This erosion phenomenon becomes hazardous during the rainy season, thereby contributing to various environmental problems, and consequently, necessitating soil erosion control planning in the Saranda forest. Read More

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Foliar water uptake via cork warts in mangroves of the Sonneratia genus.

Plant Cell Environ 2021 Jun 12. Epub 2021 Jun 12.

Plant Science Division, Research School of Biology, Australian National University, Canberra, Australia.

Foliar water uptake (FWU) occurs in plants of diverse ecosystems; however, the diversity of pathways and their associated FWU kinetics remain poorly resolved. We characterized a novel FWU pathway in two mangrove species of the Sonneratia genus, S. alba and S. Read More

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Experimental warming differentially affects vegetative and reproductive phenology of tundra plants.

Nat Commun 2021 Jun 11;12(1):3442. Epub 2021 Jun 11.

Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA.

Rapid climate warming is altering Arctic and alpine tundra ecosystem structure and function, including shifts in plant phenology. While the advancement of green up and flowering are well-documented, it remains unclear whether all phenophases, particularly those later in the season, will shift in unison or respond divergently to warming. Here, we present the largest synthesis to our knowledge of experimental warming effects on tundra plant phenology from the International Tundra Experiment. Read More

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National Early Warning Score for predicting intensive care unit admission among elderly patients with influenza infections in the emergency department: an effective disposition tool during the influenza season.

BMJ Open 2021 Jun 11;11(6):e044496. Epub 2021 Jun 11.

Department of Emergency Medicine, Cathay General Hospital, Taipei, Taiwan

Objective: During the influenza epidemic season, the fragile elderlies are not only susceptible to influenza infections, but are also more likely to develop severe symptoms and syndromes. Such circumstances may pose a significant burden to the medical resources especially in the emergency department (ED). Disposition of the elderly patients with influenza infections to either the ward or intensive care unit (ICU) accurately is therefore a crucial issue. Read More

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Maternal phthalate and phthalate alternative metabolites and urinary biomarkers of estrogens and testosterones across pregnancy.

Environ Int 2021 Jun 8;155:106676. Epub 2021 Jun 8.

Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI 48824, USA; Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, USA. Electronic address:

Background/objectives: Pregnant women are ubiquitously exposed to phthalates from food packaging materials and personal care products. Phthalates alter estrogen and testosterone concentrations in experimental models, but their ability to impact these hormones in human pregnancy is not well characterized.

Methods: We recruited women ages 18-40 into the Illinois Kids Development Study (I-KIDS) in early pregnancy. Read More

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Effects of changes in throughfall on soil GHG fluxes under a mature temperate forest, northeastern China.

J Environ Manage 2021 Jun 8;294:112950. Epub 2021 Jun 8.

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Atmospheric Chemistry and Environmental Science, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.

Climate change scenarios predict a change in the rainfall regimes for this current century, which has different impacts on soil greenhouse gas (GHG) fluxes. However, how changes in annual rainfall affect annual GHG fluxes of forest soils remain unknown. A six-year field experiment with -25% and -50% throughfall (TF) and +25% TF manipulation was performed to explore the mechanisms involving GHG fluxes under a mature temperate forest, northeastern China and to work out whether the TF effect sizes on annual soil GHG fluxes vary with dry and wet years. Read More

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Changes of avian influenza virus subtypes before and after vaccination in live poultry in Nanchang, China from 2016 to 2019.

Microbes Infect 2021 Jun 8:104848. Epub 2021 Jun 8.

The Collaboration Unit for Field Epidemiology of State Key Laboratory of Infectious Disease Prevention and Control, Jiangxi Provincial Key Laboratory of Animal-origin and Vector-borne Diseases, Nanchang Center for Disease Control and Prevention. Nanchang 330038, PR China. Electronic address:

We investigated fluctuations in the detection rates of avian influenza virus (AIV) subtypes H5, H7, and H9 in live bird markets (LBMs) in Nanchang city, Chinese province Jiangxi, before and after the Chinese nationwide AIV vaccination campaign against highly pathogenic (HP) AIV subtype H5 and H7. Samples were tested for nucleic acid of type A avian influenza virus by real-time reverse transcription polymerase chain reaction technology. The H5, H7 and H9 subtypes of influenza viruses were further classified for the positive results. Read More

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Dance Exposure, Individual Characteristics, and Injury Risk over Five Seasons in a Professional Ballet Company.

Med Sci Sports Exerc 2021 Jun 10. Epub 2021 Jun 10.

Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, United Kingdom Ballet Healthcare, The Royal Ballet, Royal Opera House, London, United Kingdom Institute of Sport Science, Dance Science, University of Bern, Bern, Switzerland Department for Health, University of Bath, Bath, United Kingdom Division of Surgery and Interventional Science, University College London, London, United Kingdom.

Purpose: To describe the relationships between dance exposure, dancer characteristics, and injury risk across five seasons in a professional ballet company.

Methods: Dance exposure time and clinician-reported time-loss and medical attention injury data were prospectively collected from 118 professional dancers of The Royal Ballet between 2015/16 and 2019/20. Cox proportional hazards and shared frailty models were fitted to overuse and traumatic injuries; individualized robust Z-scores for 7-day and 28-day accumulated exposure, and week-to-week change in exposure, age, sex, company rank, and injury history were included as time-varying covariates. Read More

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Trends in COVID-19 Testing and Positivity Rates from a Mobile Testing Program in the Phoenix Metropolitan Area.

J Community Health 2021 Jun 11. Epub 2021 Jun 11.

Vincere Cancer Center, 7469 E. Monte Cristo Avenue, Scottsdale, AZ, 85260, USA.

The coronavirus (COVID-19) pandemic continues to be a global concern, with over 150 million cases worldwide. Arizona, which was recently a hotspot for COVID-19, has over 860 thousand cases. Reviewing the COVID-19 trends over time is crucial in understanding the pandemic and evaluating the impact of mitigation techniques. Read More

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Performances of a system for free-air ozone concentration elevation with poplar plantation under increased nitrogen deposition.

Environ Sci Pollut Res Int 2021 Jun 11. Epub 2021 Jun 11.

Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.

The increasing emission of nitrogen oxides exerts large impacts on vegetation by raising surface ozone (O) concentrations and enhancing atmospheric nitrogen (N) deposition. We established a free-air O concentration elevation and enhanced N deposition system (O-N-FACE) in Beijing, China, to investigate long-term effects of elevated O and N deposition on poplar plantation. Eight square plots with a side length of 16 m were randomly allocated to elevated O (E-O) and ambient air (AA) treatments. Read More

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Nitrate sources and transformations along a mountain-to-plain gradient in the Taizi River basin in Northeast China.

Environ Sci Pollut Res Int 2021 Jun 11. Epub 2021 Jun 11.

Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361000, China.

Fifty-seven riverine samples in three typical regions, namely, upper mountainous (zone 1), middle hilly (zone 2), and lower plain (zone 3) regions, were collected in May (low flow) and August (high flow) of 2016, and chemical parameters and isotopes were analyzed to enrich the knowledge of riverine nitrate sources and transformations in the Taizi River basin. Results showed that NO concentrations in zone 3 were the highest, followed by zones 2 and 1. NO/Cl molar ratios and nitrate dual isotopes indicated that NO was mainly from chemical fertilizer (CF) in zones 1 (57. Read More

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First report of stem rust, caused by Puccinia graminis, and crown rust, caused by Puccinia coronata var. avenae f. sp. avenae, on tall fescue (Festuca arundinacea) in Georgia, USA.

Plant Dis 2021 Jun 11. Epub 2021 Jun 11.

University of Georgia, 1355, 1109 Experiment Street, Griffin, Griffin, Georgia, United States, 30223.

Stem rust, caused by Puccinia graminis, and crown rust, caused by P. coronata, are common rust diseases on cool-season grasses (Karakkat et al. 2018), for which long-distance spore dispersal was recorded in northern US (Harder and Haber 1992). Read More

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Attitudes, beliefs and practice of Egyptian healthcare workers towards seasonal influenza vaccination.

Influenza Other Respir Viruses 2021 Jun 11. Epub 2021 Jun 11.

World Health Organization Country Office, Cairo, Egypt.

Background: Seasonal influenza vaccination is highly recommended for healthcare workers (HCWs) every year to protect them and reduce the risk of disease transmission at workplaces. Relatively few studies addressed influenza vaccination in the Eastern Mediterranean Region.

Objectives: The main objective of this study was to explore the attitudes, beliefs and practice of Egyptian HCWs towards seasonal influenza vaccine. Read More

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Plasticity in Oviposition Site Selection Behavior in Drosophila suzukii (Diptera: Drosophilidae) in Relation to Adult Density and Host Distribution and Quality.

J Econ Entomol 2021 Jun 11. Epub 2021 Jun 11.

Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, USA.

Flexibility in oviposition site selection under temporally shifting environmental conditions is an important trait that allows many polyphagous insects to flourish. Population density has been shown to affect egg-laying and offspring fitness throughout the animal kingdom. The effects of population density in insects have been suggested to be mutualistic at low densities, whereas intraspecific competition is exhibited at high densities. Read More

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Responses of surface water quality to future land cover and climate changes in the Neka River basin, Northern Iran.

Environ Monit Assess 2021 Jun 11;193(7):411. Epub 2021 Jun 11.

Department of Geoenvironmental Processes and Global Change, Pyrenean Institute of Ecology, CSIC, Campus de Aula Dei, 50.059, Zaragoza, Spain.

The spatial and temporal dimensions of environmental impacts of climate and land cover changes are two significant factors altering hydrological processes. Studying the effects of these factors on water quality, provides important insight for water resource management and optimizing land planning given increasing water scarcity and water pollution. The impact of land cover and climate changes on surface water quality was assessed for the Neka River basin in Northern Iran. Read More

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Insect Succession and Decomposition Pattern on Pig Carrion During Warm and Cold Seasons in Kwazulu-Natal Province of South Africa.

J Med Entomol 2021 Jun 11. Epub 2021 Jun 11.

Discipline of Genetics, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu- Natal, Durban, South Africa.

With the aim of identifying insects with potential value as indicator species in postmortem interval (PMI), the location or season of death of human or monogastric animals, two medium-sized large white pigs were used for the study during cold and warm seasons. Five stages of decomposition and their durations were observed and described in the pig carcasses during both seasons. Carcasses were first colonized by flies from seven taxa during fresh stage. Read More

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Rumen Microbiota of Tibetan Sheep () Adaptation to Extremely Cold Season on the Qinghai-Tibetan Plateau.

Front Vet Sci 2021 25;8:673822. Epub 2021 May 25.

State Key Laboratory of Grassland Agro-Ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China.

The Qinghai-Tibet Plateau is characterized by low temperatures and hypoxia, and this feature is more obvious in the winter. However, it is not clear how Tibetan sheep adapt to extreme cold climates. To address this, we used physiological methods combined with next-generation sequencing technology to explore the differences in growth performance, forage nutrient digestion, serum biochemical indexes, and rumen microbial communities of Tibetan sheep () between the summer and winter. Read More

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Identification of Resistance Sources and Genome-Wide Association Mapping of Septoria Tritici Blotch Resistance in Spring Bread Wheat Germplasm of ICARDA.

Front Plant Sci 2021 25;12:600176. Epub 2021 May 25.

Biodiversity and Crop Improvement Program, International Center for Agricultural Research in the Dry Areas, Rabat, Morocco.

Septoria tritici blotch (STB) of wheat, caused by the ascomycete (formerly ), is one of the most important foliar diseases of wheat. In Morocco, STB is a devastating disease in temperate wheat-growing regions, and the yield losses can exceed up to 50% under favorable conditions. The aims of this study were to identify sources of resistance to STB in Septoria Association Mapping Panel (SAMP), which is composed of 377 advanced breeding lines (ABLs) from spring bread wheat breeding program of ICARDA, and to identify loci associated with resistance to STB at seedling (SRT) as well as at the adult plant (APS) stages using genome-wide association mapping (GWAM). Read More

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State Transition Modeling in Ultimate Frisbee: Adaptation of a Promising Method for Performance Analysis in Invasion Sports.

Front Psychol 2021 25;12:664511. Epub 2021 May 25.

Chair of Performance Analysis and Sports Informatics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany.

Although the body of literature in sport science is growing rapidly, certain sports have yet to benefit from this increased interest by the scientific community. One such sport is Ultimate Frisbee, officially known as Ultimate. Thus, the goal of this study was to describe the nature of the sport by identifying differences between winning and losing teams in elite-level competition. Read More

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The role of anthropogenic disturbance and invasion of yellow crazy ant in a recent decline of land crab population.

Sci Rep 2021 Jun 10;11(1):12234. Epub 2021 Jun 10.

Department of Biology, National Changhua University of Education, No. 1, Jin-De Rd., Changhua City, 50007, Taiwan.

The yellow crazy ant, Anoplolepis gracilipes was first reported in Kenting National Park, Taiwan, in the 2000s, raising the concern of this invasive ant's potential effects on the native land crab populations. We investigated the distribution and abundance of A. gracilipes and its adverse effect on the land crab populations at four land crab hotspots within the park. Read More

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2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean.

Sci Rep 2021 Jun 10;11(1):12288. Epub 2021 Jun 10.

State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China.

During late 2019 and early 2020, Australia experienced one of the most active bushfire seasons that advected large emissions over the adjacent ocean. Herein, we present a comprehensive research on mixed atmospheric aerosol particulate pollution emitted by wildfires in the atmosphere and the ocean. Based on a wide range of physical and biochemical data, including the Aerosol Robotic Network, multi-satellite observations, and Argo floats, we investigated the spatio-temporal variations and mixed compositions of aerosol particles, deposition in the coastal waters of eastern Australia and the South Pacific Ocean, and biogeochemical responses in the water column. Read More

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Latent variable dose-response modelling of external training load measures and musculoskeletal responses in elite rugby league players.

J Sports Sci 2021 Jun 10:1-9. Epub 2021 Jun 10.

Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, West Yorkshire, UK.

Establishing dose-response relationships between training load and fatigue can help the planning of training. The aim was to establish the relative importance of external training load measurements to relate to the musculoskeletal response on a group and individual player level. Sixteen elite male rugby league players were monitored across three seasons. Read More

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Seasonal variation in neurohormones, mood and sleep in patients with primary open angle glaucoma - implications of the ipRGC-system.

Chronobiol Int 2021 Jun 10:1-11. Epub 2021 Jun 10.

Department of Ophthalmology, Rigshospitalet-Glostrup Hospital, Copenhagen, Denmark.

Primary open angle glaucoma is associated with an increased risk of mood and sleep disorders. These adversities have been suggested to relate to a disrupted function of the intrinsically photosensitive retinal ganglion cells (ipRGCs). The ipRGCs are key components in the nonvisual photoreceptive system that mediates light effects on mood, sleep and circadian rhythm. Read More

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Seasonal hydrologic and geologic forcing drive hot spring geochemistry and microbial biodiversity.

Environ Microbiol 2021 Jun 10. Epub 2021 Jun 10.

Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA.

Hot springs integrate hydrologic and geologic processes that vary over short- and long-term time scales. However, the influence of temporal hydrologic and geologic change on hot spring biodiversity is unknown. Here, we coordinated near-weekly, cross-seasonal (~140 days) geochemical and microbial community analyses of three widely studied hot springs with local precipitation data in Yellowstone National Park. Read More

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The transport, effective half-lives and age distributions of radioactive releases in the northern Indian Ocean.

Mar Pollut Bull 2021 Jun 7;169:112587. Epub 2021 Jun 7.

Korea Atomic Research Institute, Daedeok-Daero 989-111, Yuseong-Gu, Daejeon, Republic of Korea.

A Lagrangian model which describes radionuclide transport in the northern Indian Ocean is described. Water circulation is obtained from HYCOM ocean model for year 2017. The model includes advection by currents, turbulent mixing and radionuclide interactions between water and sediments, described in a dynamic way using kinetic transfer coefficients. Read More

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The role of plants in the face of marine litter invasion: A case study in an Italian protected area.

Mar Pollut Bull 2021 Jun 7;169:112544. Epub 2021 Jun 7.

Department of Biology, University of Pisa, via Derna 1, 56126 Pisa, Italy; CIRSEC, Centre for Climatic Change Impact, University of Pisa, via del Borghetto 80, 56124 Pisa, Italy.

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Integrated use of inverse and biotic ligand modelling for lake water quality resilience estimation: A case of Ramsar wetland, (Deepor Beel), Assam, India.

Environ Res 2021 Jun 7:111397. Epub 2021 Jun 7.

Discipline of Earth Sciences, Indian Institute of Technology, Gandhinagar, 382355, India. Electronic address:

The present study evaluates the vulnerability of a lake system due to the combined exposure of toxic metals, major ions and mineral dissociation. The hydro-chemistry of the Deepor Beel lake reveals the dominance of carbonate weathering with strong evidences of ion-exchange reaction occurring throughout the monsoon season of 2014 and 2015. Through an integrated application of multivariate analysis, the occurrence of albite weathering was confirmed, though as an isolated incidence only, along-with substantial evidence of waste intrusion from fertilizer industries. Read More

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Characteristics of neonicotinoid and metabolite residues in Taiwanese tea leaves.

J Sci Food Agric 2021 Jun 10. Epub 2021 Jun 10.

Institute of Environmental and Occupational Health Sciences, College of Public Health, National Taiwan University, Taiwan.

Background: Neonicotinoids are widely used insecticides, and tea is a popular nonalcoholic beverage in Taiwan. However, the levels of neonicotinoids in Taiwanese tea leaves remain unclear. Therefore, this study aims to understand the characteristics of neonicotinoid and metabolite residues in Taiwanese tea leaves. Read More

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