10,762 results match your criteria worked shifts

Controlling factors of seasonal and spatial variation of riverine CO partial pressure and its implication for riverine carbon flux.

Sci Total Environ 2021 Apr 30;786:147332. Epub 2021 Apr 30.

Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China. Electronic address:

Global carbon cycle is closely related to the earth's energy budget, because CO plays an active role in the global climate change. The higher CO partial pressure (pCO) in inland water in comparison with atmosphere, causing a CO evasion from water to the air. However, the relationship between CO evasion, riverine carbon export, and hydrochemistry in watershed has remained largely unknown. Read More

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How people experience and respond to their distress predicts problem drinking more than does the amount of distress.

Addict Behav 2021 Apr 23;120:106959. Epub 2021 Apr 23.

University of Kentucky, United States.

Although broad dispositional negative affect predicts problematic alcohol use, emerging evidence suggests that individual differences in how people experience and respond to negative affect may play an important role in risk. In a sample of 358 college students assessed twice across their first year of college, the current study investigated the predictive roles of trait negative affect, affective lability (the tendency to experience rapid and intense shifts in mood), negative urgency (the tendency to act rashly when highly emotional), and problem drinking via self-report measures completed online. Data were analyzed using structural equation modeling (SEM). Read More

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Beta-lactam resistance development during the treatment processes of municipal wastewater treatment plants.

Chemosphere 2021 May 3;280:130749. Epub 2021 May 3.

Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, CZ-710 00, Ostrava, Czech Republic.

This work monitored the effect of a municipal and a village wastewater treatment plant (WWTP) technology on the fate of beta-lactam resistance genes in bacterial populations in different phases of the wastewater treatment process. In case of the municipal WWTP1, the bacteria possessing a high ampicillin resistance (minimal inhibitory concentration (MIC) values of 20 mg/mL) accumulated in the sedimentation tank, which was accompanied with a higher concentration of ampicillin in the wastewater samples (28.09 ng/L) and an increase in the relative abundance of the blaTEM gene in the bacterial population. Read More

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Gene regulation in climacteric fruit ripening.

Javier Brumos

Curr Opin Plant Biol 2021 May 7;63:102042. Epub 2021 May 7.

Institute of Molecular and Cellular Biology of Plants, Consejo Superior de Investigaciones Científicas, Universitat Politècnica de València, 46022, Valencia, Spain. Electronic address:

Seed dispersion and consequent plant propagation depend on the success of fruit ripening. Thus, ripening is a highly regulated developmental process aiming to maximize fruit organoleptic traits to attract herbivores. During ripening, the developing fruit experiences dramatic modifications, including color change, flavor improvement, and loss of firmness that are remarkably coordinated. Read More

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A 1,8-naphthalimide-based lysosome-targeting dual-analyte fluorescent probe for the detection of pH and palladium in biological samples.

Talanta 2021 Aug 29;231:122365. Epub 2021 Mar 29.

Institute of Natural Medicine and Health Products, School of Life Science, Taizhou University, Taizhou, 318000, PR China; Department of Pharmaceutics, School of Pharmacy & Key Laboratory of Smart Drug Delivery, Fudan University, Shanghai, 200433, PR China. Electronic address:

Fluorescent probes containing 1,8-naphthalimide dyes have been used to detect biomolecules in the environmental and biological fields. However, most of the probes only exhibit single fluorescent output to one analyte, making them insufficient for detection of more analytes. Herein, we developed a novel 1,8-naphthalimide-based lysosome-targeting dual-analyte sensitive fluorescent probe (DPPP) for the detection of pH and palladium (Pd) using two different emissive channels. Read More

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Nursing assistant's perceptions of the good work environment in municipal elderly care in Sweden -a focus group study.

J Health Organ Manag 2021 Apr;35(9):163-177

University of Gothenburg, Gothenburg, Sweden.

Purpose: The purpose of this paper is to investigate aspects related to difficulty to retain nursing assistants at nursing homes in Sweden related to perceived work environment characteristics.

Design/methodology/approach: To reveal aspects related to difficulty to retain nursing assistants, the paper uses the BIKVA model, sense of coherence and New Public Management (NPM). In total, three focus groups with nursing assistants at three nursing homes are interviewed with corresponding individual interviews with their senior managers and users. Read More

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Loaded forced-marching shifts mechanical contributions proximally and disrupts stride-to-stride joint work modulation in recruit aged women.

Gait Posture 2021 Apr 27;88:22-27. Epub 2021 Apr 27.

Neuromuscular Research Laboratory, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA, USA.

Background: Military personnel in combat roles often perform gait tasks with additional load, which can affect the contributions of joint mechanical work (positive and negative). Furthermore, different locomotion patterns can also affect joint specific work contributions. While mean behavior of joint work is important to understanding gait, changes in joint kinetic modulation, or the regulation/control of stride-to-stride joint work variability is necessary to elucidate locomotor system function. Read More

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Off-Patent Biological and Biosimilar Medicines in Belgium: A Market Landscape Analysis.

Front Pharmacol 2021 19;12:644187. Epub 2021 Apr 19.

Department of Pharmaceutical and Pharmacological Sciences, Clinical Pharmacology and Pharmacotherapy, KU Leuven, Leuven, Belgium.

Best-value biological medicines may generate competition in the off-patent biologicals market, resulting in having more resources available to provide patients with access to necessary medicines while maintaining high-quality care. Belgium is a country known to have low biosimilar market shares, suggesting a malfunctioning market for off-patent biologicals. This study aims to gain an in-depth understanding of the Belgian off-patent biologicals market, by looking at the evolution in volumes and costs of the relevant products in the market. Read More

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X-ray diffraction investigation of electric-field-induced switching in a hybrid improper ferroelectric.

J Appl Crystallogr 2021 Apr 18;54(Pt 2):533-540. Epub 2021 Mar 18.

Department of Chemistry, University of Warwick, Coventry, United Kingdom.

Improper ferroelectric mechanisms are increasingly under investigation for their potential to expand the current catalogue of functional materials whilst promoting couplings between ferroelectricity and other technologically desirable properties such as ferromagnetism. This work presents the results of an synchrotron X-ray diffraction experiment performed on samples of CaSrTiO in an effort to elucidate the mechanism of hybrid improper ferroelectric switching in this compound. By simultaneously applying an electric field and recording diffraction patterns, shifts in the intensity of superstructure peaks consistent with one of the switching mechanisms proposed by Nowadnick & Fennie [, (2016), , 104105] are observed. Read More

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Iranian nurses' perception of the public image of nursing and its association with their quality of working life.

Nurs Open 2021 May 5. Epub 2021 May 5.

Department of Statistics and Epidemiology, School of Health, Tabriz University of Medical Sciences, Tabriz, Iran.

Aim: To investigate the association between the nurses' perception of the public image (PI) of nursing and the quality of nursing work life (QNWL).

Design: A descriptive correlational study.

Methods: 250 nurses of 12 hospitals affiliated with Tabriz University of Medical Sciences were sampled using a proportionate stratified sampling technique. Read More

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Hydrogen Bond Acceptor Propensity of different Fluorine Atom Types: An Analysis of Experimentally- and Computationally-derived Parameters.

Chemistry 2021 May 5. Epub 2021 May 5.

Trento, Lavis, ITALY.

The propensity of organic fluorine acting as a weak hydrogen bond acceptor (HBA) in intermolecular and intramolecular interactions has been the subject of many experimental and theoretical studies often reaching different conclusions. Over the last few years new and stronger evidences have emerged for the direct involvement of fluorine in weak hydrogen bond (HB) formation. However, not all the fluorine atom types can act as weak HBA. Read More

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photoconductivity measurements of imidazole in optical fiber break-junctions.

Nanoscale Horiz 2021 May;6(5):386-392

Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology Institute of Modern Optics, Nankai University, Tianjin 300350, China.

We developed a method based on the mechanically controllable break junction technique to investigate the electron transport properties of single molecular junctions upon fiber waveguided light. In our strategy, a metal-coated tapered optical fiber is fixed on a flexible substrate, and this tapered fiber serves as both the optical waveguide and metal electrodes after it breaks. For an imidazole bridged single-molecule junction, two probable conductance values below 1G0 are observed. Read More

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Relating nucleus independent chemical shifts with integrated current density strengths.

Phys Chem Chem Phys 2021 May 5. Epub 2021 May 5.

Faculty of Science, University of Kragujevac, P. O. Box 60, 34000 Kragujevac, Serbia.

Indices based on the nucleus independent chemical shift (NICS) are the most frequently used in analysis of magnetic aromaticity. The magnetically induced current density, on the other hand, is a key concept in defining magnetic aromaticity. The integrated current strength (current strength susceptibility) was found to be a very useful tool in aromaticity studies. Read More

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Macroevolutionary history predicts flowering time but not phenological sensitivity to temperature in grasses.

Am J Bot 2021 May 4. Epub 2021 May 4.

Biodiversity Research Centre, University of British Columbia, Vancouver, V6T 1Z4, Canada.

Premise: Long-term observations show that flowering phenology has shifted in many lineages in response to climate change. However, it remains unclear whether these results can be generalized to predict the presence, direction, or magnitude of responses in lineages for which we lack long time-series data. If phenological responses are phylogenetically conserved, we can extrapolate from species for which we have data to predict the responses of close relatives. Read More

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Host and parasite traits predict cross-species parasite acquisition by introduced mammals.

Proc Biol Sci 2021 May 5;288(1950):20210341. Epub 2021 May 5.

Odum School of Ecology, University of Georgia, Athens, GA, USA.

Species invasions and range shifts can lead to novel host-parasite communities, but we lack general rules on which new associations are likely to form. While many studies examine parasite sharing among host species, the directionality of transmission is typically overlooked, impeding our ability to derive principles of parasite acquisition. Consequently, we analysed parasite records from the non-native ranges of 11 carnivore and ungulate species. Read More

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Mutual-Prototype Adaptation for Cross-Domain Polyp Segmentation.

IEEE J Biomed Health Inform 2021 May 4;PP. Epub 2021 May 4.

Accurate segmentation of the polyps from colonoscopy images provides useful information for the diagnosis and treatment of colorectal cancer. Despite deep learning methods advance automatic polyp segmentation, their performance often degrades when applied to new data acquired from different scanners or sequences (target domain). As manual annotation is tedious and labor-intensive for every new target domain, leveraging knowledge learned from the labeled source domain to promote the performance in the unlabeled target domain is highly demanded. Read More

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Social jetlag, a novel predictor for high cardiovascular risk in blue-collar workers following permanent atypical work schedules.

J Sleep Res 2021 May 4:e13380. Epub 2021 May 4.

Institute and Polyclinic for Occupational- Social- and Environmental Medicine, LMU Munich, Munich, Germany.

Cardiovascular diseases cause >4 million deaths each year in Europe alone. Preventive approaches that do not only consider individual risk factors but their interaction, such as the Systematic COronary Risk Evaluation (SCORE), are recommended by European guidelines. Increased cardiovascular risk is associated with shift-work, surely interacting with the concurrent conditions: disruption of sleep, unhealthy behaviours, and circadian misalignment. Read More

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Informing NMR experiments with molecular dynamics simulations to characterize the dominant activated state of the KcsA ion channel.

J Chem Phys 2021 Apr;154(16):165102

Department of Chemistry, Columbia University, New York, New York 10027, USA.

As the first potassium channel with an x-ray structure determined, and given its homology to eukaryotic channels, the pH-gated prokaryotic channel KcsA has been extensively studied. Nevertheless, questions related, in particular, to the allosteric coupling between its gates remain open. The many currently available x-ray crystallography structures appear to correspond to various stages of activation and inactivation, offering insights into the molecular basis of these mechanisms. Read More

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Quantifying the effect of polar interactions on the behavior of binary mixtures: Phase, interfacial, and excess properties.

J Chem Phys 2021 Apr;154(16):164503

Chemical Engineering Department, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates.

In this work, polar soft-Statistical Associating Fluid Theory (SAFT) was used in a systematic manner to quantify the influence of polar interactions on the phase equilibria, interfacial, and excess properties of binary mixtures. The theory was first validated with available molecular simulation data and then used to isolate the effect of polar interactions on the thermodynamic behavior of the mixtures by fixing the polar moment of one component while changing the polar moment of the second component from non-polar to either highly dipolar or quadrupolar, examining 15 different binary mixtures. It was determined that the type and magnitude of polar interactions have direct implications on the vapor-liquid equilibria (VLE), resulting in azeotropy for systems of either dipolar or quadrupolar fluids when mixed with non-polar or low polar strength fluids, while increasing the polar strength of one component shifts the VLE to be more ideal. Read More

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Reclamation-induced tidal restriction increases dissolved carbon and greenhouse gases diffusive fluxes in salt marsh creeks.

Sci Total Environ 2021 Jun 6;773:145684. Epub 2021 Feb 6.

State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, East China Normal University, Shanghai, China; Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station (Ministry of Education & Shanghai Science and Technology Committee), Shanghai, China.

Intertidal creeks play an important role in transporting nutrients between coastal ecosystems and ocean. Reclamation is a predominant anthropogenic disturbance in coastal regions; however, the influence of reclamation on carbon and nitrogen species and greenhouse gas (GHG) fluxes in creek remains unclear. In a subtropical salt marsh of eastern China, the seasonal patterns of dissolved carbon (DOC, DIC, CO, and CH) and inorganic nitrogen (NH-N, NO-N, and NO-N and NO) species, and the diffusive fluxes of CO, CH, and NO, were compared between the natural tidal creeks and the reclaimed creeks. Read More

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Weak biodiversity connectivity in the European network of no-take marine protected areas.

Sci Total Environ 2021 Jun 6;773:145664. Epub 2021 Feb 6.

CCMAR - Centre of Marine Sciences, University of Algarve, 8005-139 Faro, Portugal.

The need for international cooperation in marine resource management and conservation has been reflected in the increasing number of agreements aiming for effective and well-connected networks of Marine Protected Areas (MPAs). However, the extent to which individual MPAs are connected remains mostly unknown. Here, we use a biophysical model tuned with empirical data on species dispersal ecology to predict connectivity of a vast spectrum of biodiversity in the European network of marine reserves (i. Read More

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Are geochemical regime shifts identifiable in river waters? Exploring the compositional dynamics of the Tiber River (Italy).

Sci Total Environ 2021 Apr 24;785:147268. Epub 2021 Apr 24.

University of Florence, Dept. of Earth Sciences, Via G. La Pira 4, 50121 Firenze, Italy; CNR-IGG Institute of Geosciences and Earth Resources, Via G. La Pira 4, 50121 Firenze, Italy.

Rivers are dynamic and sensitive systems that change their chemical composition from source to mouth. This is due to the influence of a set of variables controlled by hydro-litho-eco-atmospheric processes and anthropic pressures which are, in turn, affected by catchment attributes. This work proposes a new way of thinking about river geochemistry focused on environmental interconnections rather than single chemical variables. Read More

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Investigating variability in microbial community composition in replicate environmental DNA samples down lake sediment cores.

PLoS One 2021 3;16(5):e0250783. Epub 2021 May 3.

Coastal and Freshwater Group, Cawthron Institute, Nelson, New Zealand.

Lake sediments are natural archives that accumulate information on biological communities and their surrounding catchments. Paleolimnology has traditionally focussed on identifying fossilized organisms to reconstruct past environments. In the last decade, the application of molecular methodologies has increased in paleolimnological studies, but further research investigating factors such as sample heterogeneity and DNA degradation are required. Read More

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One step forward, two steps back: Transcriptional advancements and fermentation phenomena in Actinobacillus succinogenes 130Z.

PLoS One 2021 3;16(5):e0245407. Epub 2021 May 3.

Complex Biosystems Program, University of Nebraska, Lincoln, Nebraska, United States of America.

Within the field of bioproduction, non-model organisms offer promise as bio-platform candidates. Non-model organisms can possess natural abilities to consume complex feedstocks, produce industrially useful chemicals, and withstand extreme environments that can be ideal for product extraction. However, non-model organisms also come with unique challenges due to lack of characterization. Read More

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Cross-Domain Retinopathy Classification with Optical Coherence Tomography Images via a Novel Deep Domain Adaptation Method.

J Biophotonics 2021 May 2. Epub 2021 May 2.

Institute for Infocomm Research, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.

Deep learning based retinopathy classification with optical coherence tomography (OCT) images has recently attracted great attention. However, existing deep learning methods fail to work well when training and testing datasets are different due to the general issue of domain shift between datasets caused by different collection devices, subjects, imaging parameters, etc. To address this practical and challenging issue, we propose a novel deep domain adaptation (DDA) method to train a model on a labelled dataset and adapt it to an unlabelled dataset (collected under different conditions). Read More

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Fire and herbivory drive fungal and bacterial communities through distinct above- and belowground mechanisms.

Sci Total Environ 2021 Apr 19;785:147189. Epub 2021 Apr 19.

Department of Biological Sciences, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa; Conservation South Africa, 301 Heritage House, Claremont 7375, South Africa.

Fire and herbivory are important natural disturbances in grassy biomes. Both drivers are likely to influence belowground microbial communities but no studies have unravelled the long-term impact of both fire and herbivory on bacterial and fungal communities. We hypothesized that soil bacterial communities change through disturbance-induced shifts in soil properties (e. Read More

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UV-Vis, Raman spectroscopic and density functional theoretical studies on microsolvation 1, 2, 4-triazole-3-thione clusters.

Spectrochim Acta A Mol Biomol Spectrosc 2021 Apr 27;258:119762. Epub 2021 Apr 27.

Department of Chemistry,Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China; Engineering Research Center for Eco-dyeing and Finishing of Textiles, Key Laboratory of Advanced Textiles Materials and Manufacture Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China. Electronic address:

Photophysical and photochemical reactions of microsolvation clusters are attracting an increasing attention due to their wide applications in materials science and biology. In this paper, 1, 2, 4-triazole-3-thione (3TT) is investigated in solid, protic, and aprotic solvents using FT-Raman, resonance Raman and electronic absorption spectroscopic experiments. The structures of microsolvation clusters in solvents were confirmed by 488 nm Raman spectroscopy combining with density functional theory (DFT) calculation. Read More

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Intensive longitudinal study of newly graduated nurses' quick returns and self-rated stress.

Scand J Work Environ Health 2021 Apr 30. Epub 2021 Apr 30.

Department of Clinical Neuroscience, Division of Psychology, Karolinska Institute, Nobelsväg 9, 171 65 Solna, Sweden.

Objective Little is known about the relationship between quick returns (QR) - shift combinations that result in inter-shift rest periods <11 hours) and stress. The current study examined whether variations in the frequency of QR, both between and within individuals, were associated with changes in self-rated stress. Methods A questionnaire was sent weekly to newly graduated nurses during the first 12 weeks of work. Read More

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How the Intensity of Night Shift Work Affects Breast Cancer Risk.

Int J Environ Res Public Health 2021 Apr 26;18(9). Epub 2021 Apr 26.

Department of Hygiene and Epidemiology, Faculty of Health Sciences, Medical University of Lodz, 90-752 Lodz, Poland.

Background-In 2019, the IARC concluded that "night shift work is probably carcinogenic to humans (Group 2A), based on limited evidence from human epidemiological studies and sufficient evidence of cancer and strong mechanistic evidence in experimental Animals." The negative health consequences of night shift work may depend on how the night shifts are scheduled. The aim of this study was to investigate how the characteristics of night work affect the risk of developing breast cancer. Read More

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Acylated Anthocyanins from Red Cabbage and Purple Sweet Potato Can Bind Metal Ions and Produce Stable Blue Colors.

Int J Mol Sci 2021 Apr 27;22(9). Epub 2021 Apr 27.

Avignon University, INRAE, UMR408, 84000 Avignon, France.

Red cabbage (RC) and purple sweet potato (PSP) are naturally rich in acylated cyanidin glycosides that can bind metal ions and develop intramolecular π-stacking interactions between the cyanidin chromophore and the phenolic acyl residues. In this work, a large set of RC and PSP anthocyanins was investigated for its coloring properties in the presence of iron and aluminum ions. Although relatively modest, the structural differences between RC and PSP anthocyanins, i. Read More

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