1,435,579 results match your criteria labor


Respiratory muscle training and exercise ventilation while diving at altitude.

Undersea Hyperb Med 2021 Second Quarter;48(2):107-117

Center for Research and Education in Special Environments, Department of Exercise and Nutrition Sciences, University at Buffalo, Buffalo, New York U.S .

Introduction: Pre-dive altitude exposure may increase respiratory fatigue and subsequently augment exercise ventilation at depth. This study examined pre-dive altitude exposure and the efficacy of resistance respiratory muscle training (RMT) on respiratory fatigue while diving at altitude.

Methods: Ten men (26±5 years; VO2peak: 39. Read More

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Leveraging Artificial Intelligence to Improve Chronic Disease Care: Methods and Application to Pharmacotherapy Decision Support for Type-2 Diabetes Mellitus.

Methods Inf Med 2021 May 11. Epub 2021 May 11.

Department of Biomedical Informatics, University of Utah, Salt Lake City, Utah, United States.

Objectives:  Artificial intelligence (AI), including predictive analytics, has great potential to improve the care of common chronic conditions with high morbidity and mortality. However, there are still many challenges to achieving this vision. The goal of this project was to develop and apply methods for enhancing chronic disease care using AI. Read More

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The Effect of Dual (Combined) Treatment in Late Preterm Infants with Patent Ductus Arteriosus.

Am J Perinatol 2021 May 11. Epub 2021 May 11.

Division of Pediatric Cardiology, Department of Pediatrics, KSU University SUA Hospital, Kahramanmaraş, Turkey.

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Challenging the association between health literacy and health: the role of conversion factors.

Health Promot Int 2021 May 11. Epub 2021 May 11.

Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.

Previous studies have found substantial correlations between health literacy and various health outcomes. However, the role of social and personal factors in those links remains understudied. Applying a moderation approach, we assume that these factors function as conversion factors on the associations between health literacy and health outcomes. Read More

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Work and life in the sport industry - A comparison of work-life interface experiences among athletic employees. A Review.

J Athl Train 2021 May 11. Epub 2021 May 11.

†University of New Mexico, Albuquerque.

Objective: To review the work-life interface literature from the sport industry, especially focusing on coaches, athletic trainers, athletes, and other sport personnel.

Data Sources: Studies were identified utilizing SPORTDiscus, PsychINFO, and Google Scholar. Sample search terms included "Work-Family Balance," "Work-Life Balance," "Work-Family Conflict," "Work-Life Conflict," "Work-Family Enrichment," and "Work-Life Enrichment. Read More

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A pilot study investigating a novel particle-based growth factor delivery system for preimplantation embryo culture.

Hum Reprod 2021 May 11. Epub 2021 May 11.

School of BioSciences, The University of Melbourne, Parkville, VIC, Australia.

Study Question: Can vascular endothelial growth factor (VEGF)-loaded silica supraparticles (V-SPs) be used as a novel mode of delivering VEGF to the developing preimplantation embryo in vitro?

Summary Answer: Supplementation of embryo culture media with V-SPs promoted embryonic development in a manner equivalent to media supplemented with free VEGF.

What Is Known Already: VEGF is a maternally derived growth factor that promotes preimplantation embryonic development in vitro. However, its use in clinical media has limitations due to its low stability in solution. Read More

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Thank you to our peer reviewers in 2020.

J Cell Sci 2021 May 11;134(9). Epub 2021 May 11.

Executive Editor, Journal of Cell Science.

2020 was a challenging year for everyone. Labs and offices were closed, Zoom meetings abounded, and health and medical services were stretched to their limits. While we all struggled to learn new ways of working, Journal of Cell Science put in place measures to help our authors with their revisions as much as we could - we extended revision deadlines, reminded reviewers to limit requests for experimental revisions, and reinforced our scoop protection policy - you can read more about those measures here. Read More

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Spin glass feature and exchange bias effect in metallic Pt/antiferromagnetic LaMnO3 heterostructure.

J Phys Condens Matter 2021 May 11. Epub 2021 May 11.

Hangzhou Dianzi University, hangzhou dianzi university, Hangzhou, 310018, CHINA.

Emergent phenomena at interfaces have been investigated intensely in pursuit of the next generation spintronics. In this work, we have integrated heterostructure consisting of paramagnetic (PM) metallic Pt and antiferromagnetic (AFM) insulator LaMnO3 (LMO). High-quality Pt (3 nm)/LMO (100 nm) heterostructure has been obtained by pulsed laser deposition (PLD). Read More

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Building optimization into the process for decommissioning, remediation of legacy sites and facilities, and management of the wastes arising: Results of an international workshop.

J Radiol Prot 2021 May 11. Epub 2021 May 11.

Norwegian Radiation and Nuclear Safety Authority, Osteras, NORWAY.

The coordinated organisation of decommissioning, remediation of legacy sites and facilities and management of the resultant waste materials has long been recognized as complex, involving technical challenges, safety and security issues, and a wide range of stakeholder interests. To help address these matters, an international workshop was held in November 2019 in Tromsø, jointly organized by the Norwegian Radiation and Nuclear Safety Authority and the Nuclear Energy Agency, in cooperation with the International Commission on Radiological Protection and the International Atomic Energy Agency. The workshop was the third in series hosted by DSA. Read More

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Fabricating Efficient and Stable Quasi-3D and 3D/2D Perovskite Solar Cells with 2D-Sheets Connected by Inorganic Type Ionic-Bond.

Nanotechnology 2021 May 11. Epub 2021 May 11.

School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, CHINA.

In this work, we report a novel two dimensional (2D) (SrBr)2PbI4 perovskite layered architecture, which were formed by the reaction of strontium bromide (SrBr2), strontium iodide (SrI2) and lead iodide (PbI2). Formation of 2D (SrBr)2PbI4 was verified by small angle XRD peak at 6.4°, which corresponds to the layer distance of 13. Read More

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Neutron dose coefficients for the lens of the eye.

J Radiol Prot 2021 May 11. Epub 2021 May 11.

Retired, Oak Ridge, Tennessee, UNITED STATES.

International Commission on Radiation Units and Measurements (ICRU) Report Number 95 (ICRU 2020) recommends new definitions of operational quantities as estimators of the International Commission on Radiological Protection (ICRP) radiation protection quantities. As part of the report, dose coefficients for neutron fluences are included for energies from 10-9 MeV through 50 MeV. For lens of the eye dosimetry, several changes in the ICRU recommended quantities are of particular interest. Read More

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Frictional characteristics of graphene layers with embedded nanopores.

Nanotechnology 2021 May 11. Epub 2021 May 11.

Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu, CHINA.

Graphite possessing extraordinary frictional properties has been widely used as solid lubricants. Interesting frictional characteristics have been observed for pristine graphene layers, for defective graphene, the frictional signal shows richer behaviors such as those found in topological defective graphene and graphene step edges. Recently discovered nanoporous graphene represents a new category of defect in graphene and its impact on graphene frictional properties has not yet been explored. Read More

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Large-scale MoS2(1-x)Se2x monolayers synthesized by confined-space CVD.

Nanotechnology 2021 May 11. Epub 2021 May 11.

Department of Electronic Engineering, Jiangnan University, Wuxi, CHINA.

Alloy engineering is efficient in modulating the electronic structure and physical and chemical properties of Transition metal dichalcogenides (TMDs). Here, we develop an efficient and simple confined-space CVD strategy by using a smaller quartz boat nested in a larger quartz boat for the preparation of ternary alloy MoS2(1-x)Se2x monolayers on SiO2/Si substrates with controllable composition. The effect of hydrogen ratio of the mixed carrier gas (Ar/H2) on the resultant flakes are systematically investigated. Read More

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FPSN-FNCC: an accurate and fast motion tracking algorithm in 3D ultrasound for image guided interventions.

Phys Med Biol 2021 May 11. Epub 2021 May 11.

Insititute of Biomedical Engineering, Tsinghua University, Shenzhen International Graduate School, Shenzhen, Shenzhen, GuangDong, CHINA.

Uncertain motions of target caused by breath, heartbeat and body drift of patient can increase the target locating error during image guided interventions, and that may cause additional surgery trauma. The surgery navigation system with accurate motion tracking is important for improving the operation accuracy and reducing trauma. In this work, we propose an accurate and fast tracking algorithm in three-dimension (3D) ultrasound (US) sequences for US guided surgery to achieve moving object tracking. Read More

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The influence of patient size on the overall uncertainty in radiographic dose audit.

J Radiol Prot 2021 May 11. Epub 2021 May 11.

Department of Medical Physics, Ninewells Hospital and Medical School, Dundee, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.

The aim of this work was to investigate the effect of patient and cohort size on the overall uncertainty associated with dose audit using radiography of the abdomen as the exemplar. Water equivalent diameter Dw was used as the surrogate for patient size and its distribution (σ(Dw)) was used to quantify the effect of sample size. The more precise the KAP calibration, the more patients are required in the cohort to have the same impact on the overall uncertainty. Read More

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Leg Joint Mechanics When Hopping at Different Frequencies.

Authors:
Mu Qiao

J Appl Biomech 2021 May 11:1-9. Epub 2021 May 11.

Louisiana Tech University.

Although the dynamics of center of mass can be accounted for by a spring-mass model during hopping, less is known about how each leg joint (ie, hip, knee, and ankle) contributes to center of mass dynamics. This work investigated the function of individual leg joints when hopping unilaterally and vertically at 4 frequencies (ie, 1.6, 2. Read More

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Stress, alcohol use, and punitive parenting during the COVID-19 pandemic.

Child Abuse Negl 2021 Apr 30;117:105090. Epub 2021 Apr 30.

College of Social Work, The Ohio State University, 1947 College Road N, Columbus, OH, 43210, United States. Electronic address:

Background: Emerging research suggests that parents are experiencing heightened stress during the COVID-19 pandemic. Parental stress is a risk factor for harsh or punitive parenting, and this association may be exacerbated by the use of alcohol.

Objective: We examine whether parental stress is associated with use of punitive parenting, as well as whether this association is modified by drinking pattern. Read More

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Distinctive roles of fibrillar collagen I and collagen III in mediating fibroblast-matrix interaction: A nanoscopic study.

Biochem Biophys Res Commun 2021 May 8;560:66-71. Epub 2021 May 8.

Department of Chemistry, Illinois Institute of Technology, 3101 S. Dearborn St., Chicago, IL, 60616, USA. Electronic address:

One major goal in tissue engineering is to create functional materials, mimicking scaffolds in native tissues, to modulate cell function for tissue repair. Collagen is the most abundant structural protein in human body. Though collagen I (COLI) and collagen III (COLIII) are the predominant collagen types in connective tissues and they form stable hybrid fibrils at varied ratios, cell responses to the hybrid matrices are underinvestigated. Read More

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Bimetal (Fe/Zn) doped BiOI photocatalyst: An effective photodegradation of tetracycline and bacteria.

Chemosphere 2021 May 5;280:130803. Epub 2021 May 5.

Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepción, Concepción, 4070409, Chile. Electronic address:

Tetracycline (TC) is one of the most commonly used broad-spectrum antibiotics to treat the bacterial infection. TC antibiotics enter into the environment because of partial metabolism in the humans and animals, thereby increasing the environmental toxicity. Therefore, it is highly needed to treat TC antibiotics from the water system. Read More

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Development of a new method for isolation of urban air particulates deposited in the human lung tissue.

Chemosphere 2021 Apr 27;280:130585. Epub 2021 Apr 27.

Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran; Center for Air Pollution Research (CAPR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran; Department of Research Methodology and Data Analysis, Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Particulate matters (PMs) are important pollutants in urban air pollution because of their variable composition. The pulmonary clearance of PMs is critical to prevent long-term immunological responses. This study established a new method for the isolation of probably deposited urban air particulates from the human lung tissue, to investigate the features of uncleared particulates. Read More

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Investigation of the efficiency of BiOI/BiOCl composite photocatalysts using UV, cool and warm white LED light sources - Photon efficiency, toxicity, reusability, matrix effect, and energy consumption.

Chemosphere 2021 Apr 23;280:130636. Epub 2021 Apr 23.

Department of Inorganic and Analytical Chemistry, University of Szeged, H-6720, Szeged, Dóm tér 7, Hungary. Electronic address:

BiOI, BiOCl, and their composites (BiOI:BiOCl) with molar ratios from 95:5 to 5:95 were synthesized and tested in the transformation of methyl orange (MO) and sulfamethoxypyridazine (SMP) antibiotic, using three various LED light sources: UV LEDs (398 nm), cool and warm white LEDs (400-700 nm). The 80:20 BiOI:BiOCl photocatalyst showed the best adsorption capacity for MO and enhanced activity compared to BiOI and BiOCl. The apparent quantum yield (Φ) of the MO and SMP transformation for cool and warm white light was slightly lower than for 398 nm UV radiation. Read More

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A novel simple and sensitive approach for determination of 1,1-dimethylhydrazine in aqueous samples by high performance liquid chromatography with ultraviolet and tandem mass spectrometric detection after derivatization with unsubstituted aromatic aldehydes.

Chemosphere 2021 May 3;280:130747. Epub 2021 May 3.

Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow, 119991, Russia.

In this work, simple, rapid and highly sensitive method of hazardous chemical 1,1-dimethylhydrazine (unsymmetrical dimethylhydrazine, UDMH) determination based on pre-column derivatization with unsubstituted aromatic aldehydes and reversed-phase high performance liquid chromatography-ultraviolet-tandem mass spectrometry (RP HPLC-UV-MS/MS) has been developed. Along with benzaldehyde, commercially available aromatic aldehydes, namely: 2-naphthaldehyde, 2-pyridinecarboxaldehyde, and 2-quinolinecarboxaldehyde, were used as derivatizing reagents in the analysis of hydrazines for the first time. The reactions were studied in a wide pH range by varying reaction time and other conditions. Read More

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Study of heterogeneous reaction of dimethyl sulfide on atmospheric-like particulate TiO.

Chemosphere 2021 May 4;280:130771. Epub 2021 May 4.

National Engineering Laboratory for VOCs Pollution Control Material & Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing, 101408, China. Electronic address:

Dimethyl sulfide (DMS) related to solar radiation and greenhouse effect is one of the most important volatile sulfides and its' oxidation products are also important contributors to acid rain. It is of great importance to study the consumption and reactions of DMS in the atmosphere. In this work, atmospheric-like particulate TiO was selected to study the reaction mechanism of DMS on TiO with the purpose to explore the possible heterogeneous oxidation of DMS. Read More

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Bio-electrocatalytic remediation of hydrocarbons contaminated soil with integrated natural attenuation and chemical oxidant.

Chemosphere 2021 Apr 26;280:130649. Epub 2021 Apr 26.

Bioengineering and Environmental Sciences Lab (BEES), Department of Energy and Environmental Engineering (DEEE), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India. Electronic address:

The present study aimed to assess the possibility of integrating natural attenuation (NA) and chemical oxidation (O) with the bio-electrocatalytic remediation (BET) process to remediate petroleum hydrocarbons contaminated soil. Six different reactors were operated, wherein in the first reactor was a NA system, and the second condition to the NA was supplemented with a chemical oxidant (NAO). These systems were compared with BET systems which were differentiated based on the position and distance between the electrodes. Read More

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Synthesis, molecular docking, and in silico ADMET studies of 4-benzyl-1-(2,4,6-trimethyl-benzyl)-piperidine: Potential Inhibitor of SARS-CoV2.

Bioorg Chem 2021 May 5;112:104967. Epub 2021 May 5.

Department of Chemistry, Texas A&M University, College Station, TX 77842, USA. Electronic address:

Nowadays, over 200 countries face a wellbeing emergency because of epidemiological disease COVID-19 caused by the SARS-CoV-2 virus. It will cause a very high effect on the world's economy and the worldwide health sector. The present work is an investigation of the newly synthesized 4-benzyl-1-(2,4,6-trimethyl-benzyl)-piperidine (M1BZP) molecule's inhibitory potential against important protein targets of SARS-CoV-2 using computational approaches. Read More

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Acute and early life-stage toxicity of atrazine in sheepshead minnow (Cyprinodon variegatus).

Ecotoxicol Environ Saf 2021 May 8;218:112303. Epub 2021 May 8.

Department of Environment and Geography, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.

Given the limited data available for estuarine/marine fish species and potential risk of being exposed to the herbicide atrazine, additional toxicity data regarding sensitive life-stages are needed. As such, this work sought to characterize: 1) the acute larval toxicity, and 2) early life-stage toxicity of technical atrazine in the model marine species sheepshead minnow (Cyprinodon variegatus). Atrazine was observed to be slightly to moderately toxic towards C. Read More

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Effects of conventionally-treated and ozonated wastewater on mortality, physiology, body length, and behavior of embryonic and larval zebrafish (Danio rerio).

Environ Pollut 2021 Apr 27;286:117241. Epub 2021 Apr 27.

Aquatic Ecology and Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Universitätsstr. 5, 45141, Essen, Germany.

To date, micropollutants from anthropogenic sources cannot be completely removed from effluents of wastewater treatment plants and therefore enter freshwater systems, where they may impose adverse effects on aquatic organisms, for example, on fish. Advanced treatment such as ozonation aims to reduce micropollutants in wastewater effluents and, thus, to mitigate adverse effects on the environment. To investigate the impact and efficiency of ozonation, four different water types were tested: ozonated wastewater (before and after biological treatment), conventionally-treated wastewater, and water from a river (River Ruhr, Germany) upstream of the wastewater treatment plant effluent. Read More

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Predictors of progression through the cascade of care to a cure for hepatitis C patients using decision trees and random forests.

Comput Biol Med 2021 May 2;134:104461. Epub 2021 May 2.

Emory University Nell Hodgson Woodruff School of Nursing, Atlanta, GA, USA. Electronic address:

Background: This study uses machine learning techniques to identify sociodemographic and clinical predictors of progression through the hepatitis C (HCV) cascade of care for patients in the 1945-1965 birth cohort in the Southern United States.

Methods: We compared sociodemographic and clinical variables between groups of patients for three care outcomes: linkage to care, initiation of antiviral treatment, and virologic cure. A decision tree model and random forest model were built for each outcome. Read More

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Tomographic similarity scan with a computed modified absolute mandibular midsagittal plane for precise and objective localization of mandibular asymmetry.

Comput Biol Med 2021 May 4;134:104465. Epub 2021 May 4.

Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, 03722, Republic of Korea. Electronic address:

The application of 3D imaging is at its cusp in craniofacial diagnosis and treatment planning. However, most applications are limited to simple subjective superimposition-based analysis. As the diagnostic accuracy dictates the precision in operability, we propose a novel method that enables objective clinical decision making for patients with mandibular asymmetry. Read More

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