76,085 results match your criteria flight


Explanatory models and help-seeking for symptoms of PTSD and depression among Syrian refugees.

Soc Sci Med 2021 Apr 1;277:113889. Epub 2021 Apr 1.

University of Bergen, Faculty of Psychology, Department of Psychosocial Science, Christies gate 12, 5015, Bergen, Norway. Electronic address:

Objective: This study investigates how Syrian refugees explain and prefer to seek help for symptoms of post-traumatic stress disorder (PTSD) and depression.

Methods: We conducted five semi-structured focus group interviews based on a vignette-technique with Syrian refugees (n = 21 men, n = 10 women). The vignettes describe a fictional person suffering from symptoms of PTSD or depression in line with DSM-5 and ICD-10 criteria. Read More

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Multicenter evaluation of the VITEK MS matrix-assisted laser desorption/ionization-time of flight mass spectrometry system for identification of bacteria, including Brucella, and yeasts.

Eur J Clin Microbiol Infect Dis 2021 Apr 10. Epub 2021 Apr 10.

R&D Microbiology, bioMérieux, Inc., St. Louis, MO, USA.

The use of matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry has proven to be rapid and accurate for the majority of clinical isolates. Some gaps remain concerning rare, emerging, or highly pathogenic species, showing the need to continuously expand the databases. In this multicenter study, we evaluated the accuracy of the VITEK MS v3. Read More

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Evaluation of Trapping Schemes to Detect Emerald Ash Borer (Coleoptera: Buprestidae).

J Econ Entomol 2021 Apr 10. Epub 2021 Apr 10.

TEALS, LLC, Waynesburg, PA 15370, USA.

Management responses to invasive forest insects are facilitated by the use of detection traps ideally baited with species-specific semiochemicals. Emerald ash borer, Agrilus planipennis Fairmaire, is currently invading North American forests, and since its detection in 2002, development of monitoring tools has been a primary research objective. We compared six trapping schemes for A. Read More

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Development and validation of a simultaneous analytical method for non-steroidal therapeutic compounds in cosmetics using LC-MS/MS.

J Sep Sci 2021 Apr 9. Epub 2021 Apr 9.

Center for Advanced Analysis, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, Cheongju-si, Chungcheongbuk-do, Republic of Korea.

Atopic dermatitis is a typical chronic inflammatory skin disease that affects all age groups and requires basic skin care for treatment. Anti-inflammatory and antiallergy steroids are the most frequently used treatments but they are limited due to their side effects caused by a weakening of the immune system. Many consumers focus on performance as a criterion for selecting cosmetics. Read More

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There is detectable variation in the lipidomic profile between stable and progressive patients with idiopathic pulmonary fibrosis (IPF).

Respir Res 2021 Apr 9;22(1):105. Epub 2021 Apr 9.

School of Biomedical Science, University of Western Australia, Crawley, WA, Australia.

Background: Idiopathic pulmonary fibrosis (IPF) is a chronic interstitial lung disease characterized by fibrosis and progressive loss of lung function. The pathophysiological pathways involved in IPF are not well understood. Abnormal lipid metabolism has been described in various other chronic lung diseases including asthma and chronic obstructive pulmonary disease (COPD). Read More

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Aerodynamic effects on an emulated hovering passerine with different wing folding amplitudes.

Bioinspir Biomim 2021 Apr 9. Epub 2021 Apr 9.

National Cheng Kung University, No.1, University Road, Tainan, 70101, TAIWAN.

Birds fly with complicated wing kinematics, especially during hovering flight. The detailed aerodynamic effect of wings with higher degrees of freedom remains to be further investigated. Therefore, we designed a novel multiarticulate flapping-wing robot with five degrees of freedom on each wing. Read More

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Quantitative determination and characterization of polyphenols from Cissus quadrangularis L. and dietary supplements using UHPLC-PDA-MS, LC-QToF and HPTLC.

J Pharm Biomed Anal 2021 Mar 23;199:114036. Epub 2021 Mar 23.

National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA; Division of Pharmacognosy, Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS, 38677, USA.

Stem and leaf of Cissus quadrangularis L. (Vitaceae), indigenous to Asia and Africa, were used for medicinal and dietary purposes with limited information about the plant's phytochemistry. Stem and leaf samples were assessed for the simultaneous determination of polyphenolic compounds (catechin, epicatechin, quercetin-3-O-β-glucopyranoside, kaempferol-3-O-β-glucoside, quercetin-3-O-β-rhamnoside, leachianol F, amurensin A, pallidol, resveratrol, and quadrangularin A), using UHPLC-PDA-MS. Read More

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Force-Sensitive Mat for Vertical Jump Measurement to Assess Lower Limb Strength: Validity and Reliability Study.

JMIR Mhealth Uhealth 2021 Apr 9;9(4):e27336. Epub 2021 Apr 9.

Electrical/Electronics Engineering and Communications Department, EUP Teruel, Universidad de Zaragoza, Teruel, Spain.

Background: Vertical jump height is widely used in health care and sports fields to assess muscle strength and power from lower limb muscle groups. Different approaches have been proposed for vertical jump height measurement. Some commonly used approaches need no sensor at all; however, these methods tend to overestimate the height reached by the subjects. Read More

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On the shape of cicada's wing leading-edge cross section.

Sci Rep 2021 Apr 8;11(1):7763. Epub 2021 Apr 8.

Department of Biology, University of New Mexico, Albuquerque, NM, USA.

An important role that the leading-edge cross-section shape plays in the wing flight performance is well known in aeronautics. However, little is known about the shape of the leading-edge cross section of an insect's wing and its contribution to remarkable qualities of insect flight. In this paper, we reveal, in the first time, the shape of the leading-edge cross section of a cicada's wing and analyze its variability along the wing. Read More

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Prediction of Streptococcus uberis clinical mastitis treatment success in dairy herds by means of mass spectrometry and machine-learning.

Sci Rep 2021 Apr 8;11(1):7736. Epub 2021 Apr 8.

School of Veterinary Medicine and Science, University of Nottingham, College Road, Sutton Bonington, LE12 5RD, Leicestershire, UK.

Streptococcus uberis is one of the leading pathogens causing mastitis worldwide. Identification of S. uberis strains that fail to respond to treatment with antibiotics is essential for better decision making and treatment selection. Read More

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Enhanced x-ray emission coinciding with giant radio pulses from the Crab Pulsar.

Science 2021 04;372(6538):187-190

Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara 252-5258, Japan.

Giant radio pulses (GRPs) are sporadic bursts emitted by some pulsars that last a few microseconds and are hundreds to thousands of times brighter than regular pulses from these sources. The only GRP-associated emission outside of radio wavelengths is from the Crab Pulsar, where optical emission is enhanced by a few percentage points during GRPs. We observed the Crab Pulsar simultaneously at x-ray and radio wavelengths, finding enhancement of the x-ray emission by 3. Read More

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DOI estimation through signal arrival time distribution: a theoretical description including proof of concept measurements.

Phys Med Biol 2021 Apr 8. Epub 2021 Apr 8.

Department of Nuclear Medicine and Radiobiology, Universite de Sherbrooke, CRCHUS/CIMS#1977, 3001, 12th Avenue North, Sherbrooke, Quebec, J1H 5N4, CANADA.

The challenge to reach 10 ps coincidence time resolution (CTR) in time-of-flight PET is triggering major efforts worldwide, but timing improvements of scintillation detectors will remain elusive without depth-of-interaction (DOI) correction in long crystals. Nonetheless, this momentum opportunely brings up the prospect of a fully time-based DOI estimation since fast timing signals intrinsically carry DOI information, even with a traditional single-ended readout. Consequently, extracting features of the detected signal time distribution could uncover the spatial origin of the interaction and in return, provide enhancement on the timing precision of detectors. Read More

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Business Class Travel Preserves Sleep Quality and Quantity and Minimizes Jet Lag During the ICC Women's T20 World Cup.

Int J Sports Physiol Perform 2021 Apr 8:1-12. Epub 2021 Apr 8.

Purpose: To determine the impact of the quality and quantity of sleep during an international flight on subsequent objective sleep characteristics, training and match-day load, self-reported well-being, and perceptions of jet lag of elite female cricketers during an International Cricket Council Women's T20 World Cup.

Methods: In-flight and tournament objective sleep characteristics of 11 elite female cricketers were assessed using activity monitors. Seated in business class, players traveled west from Melbourne, Australia, to Chennai, India. Read More

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Discovery of potential pharmacodynamic ingredients of Dang-Gui-Si-Ni Decoction based on absorbed ingredients and molecular docking.

J Ethnopharmacol 2021 Apr 5:114045. Epub 2021 Apr 5.

National Engineering Laboratory for Quality Control Technology of Chinese Herbal Medicines, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China. Electronic address:

Ethnopharmacological Relevance: The Dang-Gui-Si-Ni (DGSN) decoction as a classic prescription has been widely used for thousands of years in the clinical practice of traditional Chinese medicine (TCM). Especially in recent years, the potential efficacy of TCM for the treatment of Raynaud's syndrome has attracted great attention as there are still no specific remedies for this disease. However, the active constituents and underlying mechanisms responsible for the therapeutic benefits are not well understood, which makes it difficult to ensure quality control or to design research and drug development strategies. Read More

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Cross Platform Analysis of Volatile Organic Compounds Using Selected Ion Flow Tube and Proton-Transfer-Reaction Mass Spectrometry.

J Am Soc Mass Spectrom 2021 Apr 8. Epub 2021 Apr 8.

Department of Surgery and Cancer, Imperial College London, St. Mary's Hospital, London W2 1PE, United Kingdom.

Volatile breath metabolites serve as potential disease biomarkers. Online mass spectrometry (MS) presents real-time quantification of breath volatile organic compounds (VOCs). The study aims to assess the relationship between two online analytical mass spectrometry techniques in the quantification of target breath metabolites: selected ion flow tube mass spectrometry (SIFT-MS) and proton-transfer-reaction time-of-flight mass spectrometry (PTR-ToF-MS). Read More

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Components identification and isomers differentiation in pigeon pea (Cajanus cajan L.) leaves by LC-MS.

J Sep Sci 2021 Apr 8. Epub 2021 Apr 8.

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China.

A valid and reliable method based on ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry using electrospray ionization was established to identify chemical constituents in the ethanol extract of pigeon pea leaves. A total of 58 compounds were detected both in positive and negative modes. Among them, 42 compounds including 16 flavones, 1 flavonol, 5 flavanones, 9 isoflavones, 1 coumarin, 1 lactone, 6 stilbenes, 2 chalcones and 1 other compound were unambiguously identified or tentatively assigned in view of the retention time, the molecular formula as well as the fragmentation patterns. Read More

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Identification and genotoxicity evaluation of potential impurities in rabeprazole sodium using and analyses.

Drug Chem Toxicol 2021 Apr 8:1-7. Epub 2021 Apr 8.

Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China.

Rabeprazole sodium is a widely used drug for gastrointestinal disorders. Several analytical methods for identifying rabeprazole sodium and its impurities have been reported. However, the genotoxicity of rabeprazole sodium and its impurities is still unclear. Read More

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Time-of-flight secondary ion mass spectrometry fragment regularity in gallium-doped zinc oxide thin films.

Authors:
K G Saw S R Esa

Sci Rep 2021 Apr 7;11(1):7644. Epub 2021 Apr 7.

MIMOS Semiconductor (M) Sdn Bhd, Technology Park Malaysia, 57000, Kuala Lumpur, Malaysia.

Time-of-flight secondary ion mass spectrometry fragment analysis remains a challenging task. The fragment appearance regularity (FAR) rule is particularly useful for two-element compounds such as ZnO. Ion fragments appearing in the form of ZnO obey the rule [Formula: see text] in the positive secondary ion spectrum and [Formula: see text] in the negative spectrum where the valence of Zn is + 2 and that of O is - 2. Read More

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Myofibril and mitochondria morphogenesis are coordinated by a mechanical feedback mechanism in muscle.

Nat Commun 2021 04 7;12(1):2091. Epub 2021 Apr 7.

Aix Marseille University, CNRS, IBDM, Turing Center for Living Systems, Marseille, France.

Complex animals build specialised muscles to match specific biomechanical and energetic needs. Hence, composition and architecture of sarcomeres and mitochondria are muscle type specific. However, mechanisms coordinating mitochondria with sarcomere morphogenesis are elusive. Read More

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Identification of Chemical Compounds from using UPLC-QTOF-MS/MS and their Regulatory Effects on Immune Responses in DSS-Induced Colitis Mice.

Am J Chin Med 2021 Apr 6:1-23. Epub 2021 Apr 6.

Smart Farm Research Center, Gangneung Institute of Natural Products, Korea Institute of Science and Technology (KIST), Gangneung, Gangwon-do 25451, Korea.

Web. ex Stechm. (AG), a popular medicinal herb in Asia, has been used as a common food ingredient in Korea and is traditionally known for its anti-inflammatory properties. Read More

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Ethics simulation in nursing education: Nursing students' experiences.

Authors:
Leena Honkavuo

Nurs Ethics 2021 Apr 8:969733021994188. Epub 2021 Apr 8.

Åbo Akademi University, Finland.

Background: Ethics stimulation in nursing education focuses on human, non-technical factors in a clinical reality. Simulation as a teaching method began in the 1930s with flight simulators. In the beginning of the 1990s, simulations developed further in tandem with other technological and digital inventions, including touchscreen and three-dimensional anatomical models. Read More

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Untargeted LC-MS-based metabolomics revealed specific metabolic changes in cotyledons and roots of Ricinus communis during early seedling establishment under salt stress.

Plant Physiol Biochem 2021 Mar 13;163:108-118. Epub 2021 Mar 13.

College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China. Electronic address:

Early seedling development is one of the most crucial period of the plant's life cycle, which is highly susceptible to adverse environmental conditions, especially those impose by salt stress. Castor plant (Ricinus communis) is a famous non-edible oilseed and salt-resistant crop worldwide. However, the specific metabolic responses in the cotyledons and roots of this species during seedling establishment under salt stress are still not clearly understood. Read More

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Prediction of air traffic delays: An agent-based model introducing refined parameter estimation methods.

PLoS One 2021 7;16(4):e0249754. Epub 2021 Apr 7.

College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

We propose an agent-based model for predicting individual flight delays in an entire air traffic network. In contrast to previous work, more detailed parameter estimation methods were incorporated into the agent-based model, acting on the state transitions of agents. Specifically, a conditional probability model was proposed for modifying the expected departure time, which was used to indicate whether a flight had experienced the necessary waiting due to Ground Delay Programs (GDPs) or carrier-related reasons. Read More

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Near-term ecological forecasting for dynamic aeroconservation of migratory birds.

Conserv Biol 2021 Apr 7. Epub 2021 Apr 7.

College of Information and Computer Sciences, University of Massachusetts, 140 Governors Dr, Amherst, Massachusetts, 01002.

Near-term ecological forecasting has potential to mitigate the negative impacts of human modifications on wildlife by directing efficient dynamic conservation action through relevant and timely predictions. We use the North American avian migration system to highlight ecological forecasting applications for aeroconservation. We use millions of observations from 143 weather surveillance radars to construct and evaluate a migration forecasting system for nocturnal bird migration over the contiguous United States. Read More

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The role of activity, scan duration and patient's body mass index in the optimization of FDG imaging protocols on a TOF-PET/CT scanner.

EJNMMI Phys 2021 Apr 6;8(1):35. Epub 2021 Apr 6.

Radiology Department, Azienda Ospedaliero-Universitaria Maggiore della Carità, C.so Mazzini 18, 28100, Novara, Italy.

Background: Time-of-flight (TOF) PET technology determines a reduction in the noise and improves the reconstructed image quality in low count acquisitions, such as in overweight patients, allowing a reduction of administered activity and/or imaging time. However, international guidelines and recommendations on the F-fluoro-2-deoxyglucose (FDG) activity administration scheme are old or only partially account for TOF technology and advanced reconstruction modalities. The aim of this study was to optimize FDG whole-body studies on a TOF-PET/CT scanner by using a multivariate approach to quantify how physical figures of merit related to image quality change with acquisition/reconstruction/patient-dependent parameters in a phantom experiment. Read More

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First insights into chlorhexidine retention in the oral cavity after application of different regimens.

Clin Oral Investig 2021 Apr 6. Epub 2021 Apr 6.

Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University Hospital, Saarland University, Building 73, 66421, Homburg, Saar, Germany.

Objectives: This in situ study aimed to determine and compare the chlorhexidine (CHX) retention in the oral cavity after the application of different CHX pharmaceutical regimens.

Methods: Five volunteers used different CHX treatment regimens including mouth rinses, dental spray and toothpaste gel. After the application of the different CHX regimens, 2-μl samples were taken from saliva and buccal mucosa pellicle as well as the dental pellicle samples formed on standardized enamel surfaces. Read More

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Investigation of the presence of carbapenemases in carbapenem-resistant Klebsiella pneumoniae strains by MALDI-TOF MS (matrix-assisted laser desorption ionization-time of flight mass spectrometry) and comparison with real-time PCR method.

Indian J Med Microbiol 2021 Apr 3. Epub 2021 Apr 3.

Ege University Faculty of Medicine, Department of Medical Microbiology, İzmir, Turkey.

Purpose: We aimed to develop a new procedure for rapid detection of the carbapenemase activity using MALDI-TOF MS, and to determine the sensitivity and specificity of the method. Also, we aimed to determine the distribution of carbapenemase genes among the K.pneumoniae strains isolated in our hospital using real-time PCR. Read More

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Investigation of the limit of discovery using tile-based Fisher ratio analysis with comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry.

J Chromatogr A 2021 Mar 22;1644:462092. Epub 2021 Mar 22.

Department of Chemistry, Box 351700, University of Washington, Seattle, WA 98195, USA. Electronic address:

Comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC-TOFMS) is followed by tile-based Fisher ratio (F-ratio) analysis to investigate the "limit of discovery" for low concentration levels of sulfur-containing compounds in JP8 jet fuel. A mixture of 14 sulfur-containing compounds was spiked at 30 ppm, 15 ppm, 3 ppm and 1.5 ppm into the neat fuel prior to GC×GC-TOFMS analysis with a "reversed" column format (aka polar first dimension (D) and non-polar second dimension (D) column). Read More

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FeS/carbon felt as an efficient electro-Fenton cathode for carbamazepine degradation and detoxification: In-depth discussion of reaction contribution and empirical kinetic model.

Environ Pollut 2021 Mar 27;282:117023. Epub 2021 Mar 27.

Institute of Environment Engineering and Research, University of Engineering and Technology, GT Road, 54890, Lahore, Punjab, Pakistan.

Carbamazepine (CBZ) decay by electro-Fenton (EF) oxidation using a novel FeS/carbon felt (CF) cathode, instead of a soluble iron salt, was studied with the aim to accelerate the reaction between HO and ferrous ions, which helps to produce more hydroxyl radicals (OH) and eliminate iron sludge. First, fabricated FeS and its derived cathode were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. Anodes were then screened, with DSA (Ti/IrO-RuO) showing the best performance under EF oxidation regarding CBZ degradation and electrochemical characterization. Read More

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Direct distinction of ibuprofen and flurbiprofen enantiomers by ion mobility mass spectrometry of their ternary complexes with metal cations and cyclodextrins in the gas phase.

J Sep Sci 2021 Apr 6. Epub 2021 Apr 6.

Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.

Enantiomeric drugs are widely used and play important roles in pharmaceuticals. Ion mobility spectrometry coupled with MS technology provides a unique method for distinguishing the enantiomeric drugs, enantiomeric identification and quantitation in the gas phase. In this study, enantiomeric molecules of ibuprofen and flurbiprofen were clearly recognized by forming host-guest complex ions using trapped ion mobility time-of-flight MS. Read More

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