4,464,711 results match your criteria time 243


Transient neural network dynamics in cognitive ageing.

Neurobiol Aging 2021 May 14;105:217-228. Epub 2021 May 14.

MRC Cognition & Brain Sciences Unit, University of Cambridge, Cambridge, UK; Department of Psychiatry, University of Cambridge, Cambridge, UK.

It is important to maintain cognitive function in old age, yet the neural substrates that support successful cognitive ageing remain unclear. One factor that might be crucial, but has been overlooked due to limitations of previous data and methods, is the ability of brain networks to flexibly reorganize and coordinate over a millisecond time-scale. Magnetoencephalography (MEG) provides such temporal resolution, and can be combined with Hidden Markov Models (HMMs) to characterise transient neural states. Read More

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The protective effect of tight-fitting powered air-purifying respirators during chest compressions.

Am J Emerg Med 2021 Jun 7;49:172-177. Epub 2021 Jun 7.

Department of Emergency and Critical Care, Nagoya University Hospital, 65 Tsurumai, Showa, Nagoya, Aichi 466-8560, Japan. Electronic address:

Background: Airborne personal protective equipment is required for healthcare workers when performing aerosol-generating procedures on patients with infectious diseases. Chest compressions, one of the main components of cardiopulmonary resuscitation, require intense and dynamic movements of the upper body. We aimed to investigate the protective effect of tight-fitting powered air-purifying respirators (PAPRs) during chest compressions. Read More

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Selenium respiration in anaerobic bacteria: Does energy generation pay off?

J Inorg Biochem 2021 Jun 5;222:111509. Epub 2021 Jun 5.

Department of Biology, University of New Mexico, MSCO3 2020, Albuquerque, NM 87131, USA.

Selenium (Se) respiration in bacteria was revealed for the first time at the end of 1980s. Although thermodynamically-favorable, energy-dense and documented in phylogenetically-diverse bacteria, this metabolic process appears to be accompanied by a number of challenges and numerous unanswered questions. Selenium oxyanions, SeO and SeO, are reduced to elemental Se (Se) through anaerobic respiration, the end product being solid and displaying a considerable size (up to 500 nm) at the bacterial scale. Read More

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Neural optimal tracking control of constrained nonaffine systems with a wastewater treatment application.

Neural Netw 2021 Jun 2;143:121-132. Epub 2021 Jun 2.

Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China; Beijing Key Laboratory of Computational Intelligence and Intelligent System, Beijing University of Technology, Beijing 100124, China; Beijing Institute of Artificial Intelligence, Beijing University of Technology, Beijing 100124, China. Electronic address:

In this paper, we aim to solve the optimal tracking control problem for a class of nonaffine discrete-time systems with actuator saturation. First, a data-based neural identifier is constructed to learn the unknown system dynamics. Then, according to the expression of the trained neural identifier, we can obtain the steady control corresponding to the reference trajectory. Read More

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Is there a relationship between nursing students' smartphone use, their fear of missing out and their care-related behaviour?

Nurse Educ Pract 2021 Jun 3;54:103111. Epub 2021 Jun 3.

Aged Care Program, Nevsehir Haci Bektaş Veli University, Health Services Vocational School, Nevşehir, Turkey. Electronic address:

Aim: This study aims to determine the relationship between smartphone use among intern nursing students, fear of missing out and their care-related behaviour.

Background: Today, smartphone use is common and fear of missing out is a prominent issue in our society; this behaviour and issue are linked and may lead to adverse consequences.

Design: The study is conducted as a cross-sectional design. Read More

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Novel photosensitive dual-anisotropic conductive Janus film endued with magnetic-luminescent properties and derivative 3D structures.

J Colloid Interface Sci 2021 May 26;601:899-914. Epub 2021 May 26.

Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.

A new photosensitive dual-anisotropic conductive Janus film (PDCJF) is proposed for the first time. It is rationally designed and manufactured by facile electrospinning. PDCJF is firstly constructed using 2,7-dibromo-9-fluorenone (DBF) with photoconductive and luminescent properties. Read More

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US estimates for dog bite injuries presenting to emergency departments.

Authors:
S Ramgopal M L Macy

Public Health 2021 Jun 9;196:1-3. Epub 2021 Jun 9.

Division of Emergency Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, USA; Mary Ann & J. Milburn Smith Child Health Outcomes, Research, and Evaluation Center, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.

Objectives: Dog bites are a frequent source of injury requiring emergency department (ED) management. We sought to evaluate the longitudinal burden of dog bites presenting to US EDs.

Study Design: Cross-sectional study of a complex survey. Read More

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A computational pipeline for data augmentation towards the improvement of disease classification and risk stratification models: A case study in two clinical domains.

Comput Biol Med 2021 Jun 6;134:104520. Epub 2021 Jun 6.

Unit of Medical Technology and Intelligent Information Systems, Department of Materials Science and Engineering, University of Ioannina, Ioannina, GR45110, Greece; Department of Biomedical Research, FORTH-IMBB, Ioannina, GR45110, Greece. Electronic address:

Virtual population generation is an emerging field in data science with numerous applications in healthcare towards the augmentation of clinical research databases with significant lack of population size. However, the impact of data augmentation on the development of AI (artificial intelligence) models to address clinical unmet needs has not yet been investigated. In this work, we assess whether the aggregation of real with virtual patient data can improve the performance of the existing risk stratification and disease classification models in two rare clinical domains, namely the primary Sjögren's Syndrome (pSS) and the hypertrophic cardiomyopathy (HCM), for the first time in the literature. Read More

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The time course of speaker-specific language processing.

Cortex 2021 May 17;141:311-321. Epub 2021 May 17.

Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Germany.

Listeners are sensitive to a speaker's individual language use and generate expectations for particular speakers. It is unclear, however, how such expectations affect online language processing. In the present EEG study, we presented thirty-two participants with auditory sentence stimuli of two speakers. Read More

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Sampling rate influences the regularity analysis of temporal domain measures of walking more than spatial domain measures.

Gait Posture 2021 Jun 4;88:216-220. Epub 2021 Jun 4.

Center for Research in Human Movement Variability, Department of Biomechanics, University of Nebraska at Omaha, 6160 University Drive, Omaha, NE, 68182-0860, United States; VA Nebraska-Western Iowa Health Care System, VA Research Service, 4104 Woolworth Avenue (112), Omaha, NE, 68105, United States; Department of Health and Kinesiology, Texas A&M University, 2929 Research Parkway, College Station, TX, 77843, United States. Electronic address:

Background: The spatiotemporal dynamics of stepping can provide useful information about walking performance. Most often, the identification of gait motion is performed using 3-D cinematography. The sampling rate of motion capture systems may influence the accuracy of these measures albeit in varying degrees for measures within the spatial versus temporal domain. Read More

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Hormonal stress responses of growth hormone and insulin-like growth factor-I in highly resistance trained women and men.

Growth Horm IGF Res 2021 Jun 6;59:101407. Epub 2021 Jun 6.

Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, USA.

The purpose of this study was to examine the responses of growth hormone (GH) and insulin-like growth factor-I (IGFI) to intense heavy resistance exercise in highly trained men and women to determine what sex-dependent responses may exist. Subjects were highly resistance trained men (N = 8, Mean ± SD; age, yrs., 21 ± 1, height, cm, 175. Read More

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Co-production of functional xylo-oligosaccharides and fermentable sugars from corn stover through fast and facile ball mill-assisted alkaline peroxide pretreatment.

Bioresour Technol 2021 May 24;337:125327. Epub 2021 May 24.

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China. Electronic address:

The aim of this work was to develop a feasible ball mill-assisted alkaline peroxide pretreatment followed by stepwise hydrolysis to improve the yield of xylo-oligosaccharides (XOS) and fermentable sugars. The hydrogen peroxide charge, ball-milling time, and solid-to-liquid ratio affected the compositions, particle sizes, morphology, and crystallinity of the corn stover, directly improving the following hydrolytic efficiency. The optimal pretreatment was with 0. Read More

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Nonlinear dynamics for the spread of pathogenesis of COVID-19 pandemic.

J Infect Public Health 2021 Apr 20;14(7):817-831. Epub 2021 Apr 20.

University School of Basic & Applied Sciences (USBAS), Head, Non-Linear Dynamics-Research-Lab, GGS Indraprastha University, New Delhi, India. Electronic address:

Coronaviruses did not invite attention at a global level and responsiveness until the series of 2003-SARS contagion followed by year-2012 MERS plus, most recently, 2019-nCoV eruptions. SARS-CoV &MERS-CoV are painstaking, extremely pathogenic. Also, very evidently, both have been communicated from bats to palm-civets & dromedary camels and further transferred ultimately to humans. Read More

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Establishing paediatric diagnostic reference levels using reference curves - A feasibility study including conventional and CT examinations.

Phys Med 2021 Jun 9;87:65-72. Epub 2021 Jun 9.

Department of Radiation Protection and Measurement Services, Norwegian Radiation and Nuclear Safety Authority, Bærum, Norway; Department of Health Sciences, Norwegian University of Science and Technology, Gjøvik, Norway.

Purpose: To derive Regional Diagnostic Reference Levels (RDRL) for paediatric conventional and CT examinations using weight-based DRL curves and compare the outcome with DRL derived using the weight groups.

Methods: Data from 1722 examinations performed at 29 hospitals in four countries were included. DRL was derived for four conventional x-ray (chest, abdomen, pelvis, hips/joints) and two types of CT examinations (thorax, abdomen). Read More

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Just "one of so many"? The pathologist Theodor Fahr (1877-1945) and his ambivalent relationship to National Socialism.

Pathol Res Pract 2021 May 23;224:153488. Epub 2021 May 23.

Institute for History, Theory and Ethics in Medicine, Medical Faculty, RWTH Aachen University, Wendlingweg 2, Aachen, D-52074, Germany. Electronic address:

Theodor Fahr is well known as a pioneer in renal pathology and the eponym of "Fahr's disease". While his professional merits are undisputed, his relationship to National Socialism remains unclear. On the one hand, he signed the public "oath of allegiance" of German professors to Adolf Hitler, on the other hand, he appeared as a mentor to his Jewish colleague Paul Kimmelstiel. Read More

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HOXB5 promotes the progression of breast cancer through wnt/beta-catenin pathway.

Pathol Res Pract 2020 Jul 13;224:153117. Epub 2020 Jul 13.

National Clinical Research Center for Normal Aging and Geriatric & The Key Lab of Normal Aging and Geriatric, Institute of Geriatric, PLA General Hospital, Beijing, China. Electronic address:

Objective: The present study was designed to explore the function of HOXB5 in breast cancer and related signaling pathway.

Methods: Breast cancer tissues and non-cancerous tissues were collected from 82 cases who were pathologically diagnosed with breast cancer. The mRNA level of HOXB5 was detected via quantitative real-time polymerase chain reaction (qRT-PCR). Read More

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Examining factors associated with postintervention recidivism in DUI repeat offenders after alcohol treatment: One-year follow-up study.

J Subst Abuse Treat 2021 Apr 21;130:108426. Epub 2021 Apr 21.

Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, 309 Songde Road, 110 Taipei, Taiwan; Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, 250 Wu-Hsing Street, 110 Taipei, Taiwan; Psychiatric Research Center, Taipei Medical University Hospital, 250 Wu-Hsing Street, 110 Taipei, Taiwan. Electronic address:

Taiwan has deemed driving under the influence of alcohol (DUI) to be criminal, and offenders are subjected to fines and jail penalties without being offered alcohol-related treatment, although alcohol use problems are prevalent in this population. We followed the recidivism records of DUI repeat offenders for one year after they had received a newly established legal-medical joint intervention program for alcohol treatment and examined factors related to postintervention recidivism. In this study, 231 DUI repeat offenders with alcohol use problems screened out by the Alcohol Use Disorder Identification Test were referred from the prosecutors' office to one psychiatric hospital for SBIRT-based alcohol treatment. Read More

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Extended-release naltrexone for youth with opioid use disorder.

J Subst Abuse Treat 2021 Apr 15;130:108407. Epub 2021 Apr 15.

Friends Research Institute, 1040 Park Avenue, Suite, 103 Baltimore, MD, USA. Electronic address:

Background: Few published research studies have examined the effectiveness of extended-release naltrexone (XR-NTX) for the treatment of opioid use disorder (OUD) among adolescents and young adults.

Methods: This two-group randomized controlled trial recruited 288 youth, ages 15-21, with moderate/severe OUD from a residential addiction treatment program in Baltimore, Maryland. The study randomized the youth within the first week of treatment entry to receive either XR-NTX or treatment-as-usual (TAU; either buprenorphine maintenance treatment or treatment without OUD medication following medically managed withdrawal) prior to discharge, with continued treatment in the community for 6 months. Read More

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Using daily diary methods to understand how college students in recovery use social support.

J Subst Abuse Treat 2021 Apr 14;130:108406. Epub 2021 Apr 14.

NLW Partners, Lubbock, TX, USA. Electronic address:

Collegiate Recovery Communities (CRCs) are important sources of support for college students building and maintaining recovery from substance use disorders. The current study used daily diary data from members of a CRC to examine with which sources of social support students engaged daily, and whether students connected with these sources more on days when they indicated higher-than-usual recovery difficulty, negative affect, and/or school stress. Results indicate that on days when students reported having greater difficulty with recovery maintenance than usual, they had higher odds of being in contact with family members and were expected to talk or spend time with family for longer than usual. Read More

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Buprenorphine use and disparities in access among emergency department patients with opioid use disorder: A cross-sectional study.

J Subst Abuse Treat 2021 Apr 20;130:108405. Epub 2021 Apr 20.

Cooper Medical School of Rowan University, 401 Broadway, Camden, NJ 08103, United States of America; Cooper University Hospital, Department of Emergency Medicine, Keleman 152, 1 Cooper Plaza, Camden, NJ 08103, United States of America. Electronic address:

Background: Buprenorphine, a partial mu-opioid agonist and kappa-opioid antagonist, is an approved treatment for opioid use disorder (OUD). Studies demonstrate that buprenorphine decreases cravings for other opioids, effectively ameliorates withdrawal symptoms, and decreases opioid overdose and mortality. However, buprenorphine remains under-utilized. Read More

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Temporal transition of racial/ethnic disparities in COVID-19 outcomes in 3108 counties of the United States: Three phases from January to December 2020.

Sci Total Environ 2021 Jun 1;791:148167. Epub 2021 Jun 1.

School of the Environment, Yale University, New Haven, CT, United States of America.

Early studies reported higher risk of COVID-19 outcomes for racial/ethnic minorities in the early phase of the pandemic in the United States. While the initial surge of COVID-19 was concentrated in some areas, COVID-19 became pervasive across the entire continent with high impacts in the northern region and central region in the end of 2020. With this geographical transition, we aim to investigate patterns of these racial/ethnic disparities over time. Read More

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Investigating the potential of Sentinel-2 configuration to predict the quality of Mediterranean permanent grasslands in open woodlands.

Sci Total Environ 2021 May 29;791:148101. Epub 2021 May 29.

Department of Forest Engineering, ETSIAM, University of Cordoba, Ctra. Madrid, Km 396, 14071 Córdoba, Spain. Electronic address:

The assessment of pasture quality in permanent grasslands is essential for their conservation and management, as it can contribute to making real-time decisions for livestock management. In this study, we assessed the potential of Sentinel-2 configuration to predict forage quality in high diverse Mediterranean permanent grasslands of open woodlands. We evaluated the performance of Partial Least Squares Regression (PLS) models to predict crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF) and enzyme digestibility of organic matter (EDOM) by using three different reflectance datasets: (i) laboratory measurements of reflectance of dry and ground pasture samples re-sampled to Sentinel-2 configuration (Spec-lab) (ii) field in-situ measurements of grasslands canopy reflectance resampled to Sentinel-2 configuration (Spec-field); (iii) and Bottom Of Atmosphere Sentinel-2 imagery. Read More

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Co-hydrothermal carbonization of swine manure and cellulose: Influence of mutual interaction of intermediates on properties of the products.

Sci Total Environ 2021 May 29;791:148134. Epub 2021 May 29.

School of Material Science and Engineering, University of Jinan, Jinan 250022, China. Electronic address:

Co-hydrothermal carbonization (HTC) of livestock manure and biomass might improve the fuel properties of the hydrochar due to the high reactivity of the biomass-derived intermediates with the abundant oxygen-containing functionalities. However, the complicated compositions make it difficult to explicit the specific roles of the individual components of biomass played in the co-HTC process. In this study, cellulose was used for co-HTC with swine manure to investigate the influence on the properties of the hydrochar. Read More

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Orally administered nano-polystyrene caused vitellogenin alteration and oxidative stress in the red swamp crayfish (Procambarus clarkii).

Sci Total Environ 2021 May 29;791:147984. Epub 2021 May 29.

Dept. Life Sciences, University of Trieste, via L. Giorgieri 5, 34127 Trieste, Italy. Electronic address:

Nanoplastics (≤100 nm) represent the smallest fraction of plastic litter and may result in the aquatic environment as degradation products of larger plastic material. To date, few studies focused on the interactions of micro- and nanoplastics with freshwater Decapoda. The red swamp crayfish (Procambarus clarkii, Girard, 1852) is an invasive species able to tolerate highly perturbed environments. Read More

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Trends in environmental chemical concentrations in the Canadian population: Biomonitoring data from the Canadian Health Measures Survey 2007-2017.

Environ Int 2021 Jun 9;155:106678. Epub 2021 Jun 9.

Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, Canada.

Ten years of nationally representative biomonitoring data collected between 2007 and 2017 are available from the Canadian Health Measures Survey (CHMS). These data establish baseline environmental chemical concentrations in the general population. Here we sought to evaluate temporal trends in environmental chemical exposures in the Canadian population by quantifying changes in biomarker concentrations measured in the first five two-year cycles of the CHMS. Read More

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MIDeepSeg: Minimally interactive segmentation of unseen objects from medical images using deep learning.

Med Image Anal 2021 May 18;72:102102. Epub 2021 May 18.

School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China; SenseTime Research, Shanghai, China.

Segmentation of organs or lesions from medical images plays an essential role in many clinical applications such as diagnosis and treatment planning. Though Convolutional Neural Networks (CNN) have achieved the state-of-the-art performance for automatic segmentation, they are often limited by the lack of clinically acceptable accuracy and robustness in complex cases. Therefore, interactive segmentation is a practical alternative to these methods. Read More

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Pesticides are the dominant stressors for vulnerable insects in lowland streams.

Water Res 2021 May 17;201:117262. Epub 2021 May 17.

Department of River Ecology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany.

Despite elaborate regulation of agricultural pesticides, their occurrence in non-target areas has been linked to adverse ecological effects on insects in several field investigations. Their quantitative role in contributing to the biodiversity crisis is, however, still not known. In a large-scale study across 101 sites of small lowland streams in Central Europe, Germany we revealed that 83% of agricultural streams did not meet the pesticide-related ecological targets. Read More

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Detection of ultrashort-chain and other per- and polyfluoroalkyl substances (PFAS) in U.S. bottled water.

Water Res 2021 May 27;201:117292. Epub 2021 May 27.

Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, 615 North Wolfe Street, Baltimore, MD, 21205, USA. Electronic address:

Per- and polyfluoroalkyl substances (PFAS) are compounds of emerging concern due to their persistence in the global water cycle and detection in drinking water sources. However, PFAS have been poorly studied in bottled water, especially in the United States. This study investigated the occurrence of PFAS and related factors in 101 uniquely labelled bottled water products for sale in the U. Read More

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Expression of angiogenesis-related proteins in bone marrow mesenchymal stem cells induced by osteoprotegerin during osteogenic differentiation in rats.

Authors:
Wei Wang Bo Wang

Int Immunopharmacol 2021 Jun 9;98:107821. Epub 2021 Jun 9.

Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China. Electronic address:

This study aimed to discuss the expression of angiogenesis-related proteins in bone marrow mesenchymal stem cells (BMSCs) induced by osteoprotegerin (OGP) during osteogenic differentiation in rats, and to analyze the effect of fracture healing inflammatory factor TNF-ɑ on the osteogenic differentiation of BMSCs of rats. BMSCs isolated and cultured from the third generation rats were taken as the research object. According to the addition amount of OGP, BMSCs were divided into control group, OGP (10 mol/L) group, OGP (10 mol/L) group, and OGP (10 mol/L) group. Read More

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Cross-sectional associations of leisure and transport related physical activity with depression and anxiety.

J Psychiatr Res 2021 Jun 4;140:228-234. Epub 2021 Jun 4.

Departmento de Clínica Médica, Faculdade de Medicina da USP & Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil; Laboratory of Neurosciences (LIM-27), Institute of Psychiatry, Hospital das Clínicas da Faculdade de Medicina da USP, Brazil.

Background: Previous evidence supports the notion that the physical activity (PA) domain (leisure-time or transport), and the amount of time spent in PA, influence the association of PA with depressive and anxiety symptoms. However, no study evaluated the associations of different volumes of leisure-time PA (LTPA) and transport PA (TPA) with prevalent depression, anxiety, and co-occurring depression and anxiety (D&A) disorders.

Aim: To investigate the associations between different volumes of LTPA and TPA with prevalent depression, anxiety, and D&A. Read More

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