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https://www.readbyqxmd.com/read/29156597/different-ways-to-apply-a-measurement-instrument-of-e-nose-type-to-evaluate-ambient-air-quality-with-respect-to-odour-nuisance-in-a-vicinity-of-municipal-processing-plants
#1
REVIEW
Bartosz Szulczyński, Tomasz Wasilewski, Wojciech Wojnowski, Tomasz Majchrzak, Tomasz Dymerski, Jacek Namieśnik, Jacek Gębicki
This review paper presents different ways to apply a measurement instrument of e-nose type to evaluate ambient air with respect to detection of the odorants characterized by unpleasant odour in a vicinity of municipal processing plants. An emphasis was put on the following applications of the electronic nose instruments: monitoring networks, remote controlled robots and drones as well as portable devices. Moreover, this paper presents commercially available sensors utilized in the electronic noses and characterized by the limit of quantification below 1 ppm v/v, which is close to the odour threshold of some odorants...
November 19, 2017: Sensors
https://www.readbyqxmd.com/read/29156268/use-of-a-handheld-low-cost-sensor-to-explore-the-effect-of-urban-design-features-on-local-scale-spatial-and-temporal-air-quality-variability
#2
Georgia Miskell, Jennifer A Salmond, David E Williams
Portable low-cost instruments have been validated and used to measure ambient nitrogen dioxide (NO2) at multiple sites over a small urban area with 20min time resolution. We use these results combined with land use regression (LUR) and rank correlation methods to explore the effects of traffic, urban design features, and local meteorology and atmosphere chemistry on small-scale spatio-temporal variations. We measured NO2 at 45 sites around the downtown area of Vancouver, BC, in spring 2016, and constructed four different models: i) a model based on averaging concentrations observed at each site over the whole measurement period, and separate temporal models for ii) morning, iii) midday, and iv) afternoon...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29156218/use-of-luminescent-gunshot-residues-markers-in-forensic-context-part-ii
#3
A M Arouca, M A M Lucena, R J Rossiter, M Talhavini, I T Weber
Gunshot residues (GSR) are important physical evidence in firearm-related crimes. Recently developed non-toxic ammunition, however, requires a new methodology for its characterization. To overcome this drawback, the introduction of noncommercial luminescent markers in ammunition was proposed. These markers, synthesized and added to the gunpowder, presented as a versatile tool for GSR analysis, since they require UV radiation alone to visualize the luminescent GSR (LGSR). This has opened up new perspectives for understanding GSR behavior at a crime scene...
November 6, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29155778/a-detailed-protocol-for-physiological-parameters-acquisition-and-analysis-in-neurosurgical-critical-patients
#4
Xiang Wu, Guoyi Gao, Junfeng Feng, Qing Mao, Jiyao Jiang
Intracranial pressure (ICP) monitoring is now widely used in neurosurgical critical patients. Besides mean ICP value, the ICP derived parameters such as ICP waveform, amplitude of pulse (AMP), the correlation of ICP amplitude and ICP mean (RAP), pressure reactivity index (PRx), ICP and arterial blood pressure (ABP) wave amplitude correlation (IAAC), and so on, can reflect intracranial status, predict prognosis, and can also be used as guidance of proper treatment. However, most of the clinicians focus only on the mean ICP value while ignoring these parameters because of the limitations of the current devices...
October 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155767/a-wireless-bidirectional-interface-for-in-vivo-recording-and-stimulation-of-neural-activity-in-freely-behaving-rats
#5
Liana Melo-Thomas, K-Alexander Engelhardt, Uwe Thomas, Dirk Hoehl, Sascha Thomas, Markus Wöhr, Bjoern Werner, Frank Bremmer, Rainer K W Schwarting
In vivo electrophysiology is a powerful technique to investigate the relationship between brain activity and behavior at a millisecond and micrometer scale. However, current methods mostly rely on tethered cable recordings or only use unidirectional systems, allowing either recording or stimulation of neural activity, but not at the same time or same target. Here, a new wireless, bidirectional device for simultaneous multichannel recording and stimulation of neural activity in freely behaving rats is described...
November 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155337/photodynamic-therapy-in-fibrosarcoma-balb-c-animal-model-observation-of-the-rebound-effect
#6
Etcheverry María Eugenia, Pasquale Miguel Ángel, Gutiérrez Anabella, Bibé Solange, Ponzinibbio Carlos, Poteca Horacio, Garavaglia Mario
In vivo spectrofluorometric analysis during photodynamic therapy (PDT) is a fundamental tool to obtain information about the drug bleaching kinetics. Using a portable spectrofluorometer with an excitation source emitting at 400nm wavelength and a spectral analyzer ranging from 500nm to 800nm, the evolution of the meta-tetra(hydroxyphenyl) chlorin (m-THPC) photosensitizer fluorescence spectrum at the tumoral tissue of BALB/c murines with fibrosarcoma located at their flank was followed up. Ex vivo fluorescence measurements of the tumor and skin were also performed with the aim of better characterizing the in vivo signal at different parts of the tumor...
November 16, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29154695/an-evaluation-of-portable-wet-bulb-globe-temperature-monitor-accuracy
#7
Earl Cooper, Andrew Grundstein, Adam Rosen, Jessica Miles, Jupil Ko, Patrick Curry
CONTEXT:   Wet bulb globe temperature (WBGT) is the gold standard for assessing environmental heat stress during physical activity. Many manufacturers of commercially available instruments fail to report WBGT accuracy. OBJECTIVE:   To determine the accuracy of several commercially available WBGT monitors compared with a standardized reference device. DESIGN:   Observational study. SETTING:   Field test. PATIENTS OR OTHER PARTICIPANTS:   Six commercially available WBGT devices...
November 20, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29153664/microcirculatory-blood-flow-derangements-during-severe-preeclampsia-and-hellp-syndrome
#8
Gustavo Adolfo Ospina-Tascón, Albaro José Nieto Calvache, Edgardo Quiñones, Humberto José Madriñan, Juan David Valencia, William Fernando Bermúdez, Javier Carvajal, María Fernanda Escobar, Daniel de Backer
OBJECTIVE: To evaluate the microcirculatory blood flow in severe preeclampsia and compare it with healthy pregnant and non-pregnant women controls, using a portable intravital-microscopy technique. METHODS: Using a side-stream dark field (SDF) device, we prospectively evaluated the sublingual microcirculatory blood flow before placental delivery in 40 women with severe preeclampsia (PE-group) complicated (n=8) or not (n=32) with HELLP syndrome, 40 healthy pregnant women (HP-group) matched by gestational and chronological age, and 20 healthy non-pregnant women (NP-group)...
October 2017: Pregnancy Hypertension
https://www.readbyqxmd.com/read/29153209/-using-negative-pressure-therapy-to-prevent-and-treat-wounds
#9
REVIEW
Marguerite Nicodème, Maxime Chéron, Isabelle Fromantin
The offer of Negative Pressure Wound Therapy (NPWT) has considerably increased these last years. Nowadays, one can choose between different tools such as motorised systems - or not - like pumps; devices which are particularly portables; automated therapies allowing regular instillations; or finally systems adapted to specific indications like "open abdominal wounds". This diversity of devices implies more than ever that prescriptions from the medical doctor be detailed and a good trackability of the nursing follow-up...
November 2017: Soins; la Revue de Référence Infirmière
https://www.readbyqxmd.com/read/29152658/hepatic-differentiation-of-mouse-bone-marrow%C3%A2-derived-mesenchymal-stem-cells-using-a-novel-3d-culture-system
#10
Qiong Wu, Jing Tang, Yi Li, Li Li, Yujia Wang, Ji Bao, Hong Bu
The development of novel culture systems that mimic the in vivo microenvironment may be beneficial for inducing the differentiation of stem cells and promoting liver function. In the present study, spheroid cultures and decellularized liver scaffolds (DLSs) were utilized to obtain differentiated hepatocyte‑like cells. Mouse bone marrow (BM)‑derived mesenchymal stem cells (MSCs) self‑aggregated into spheroids under low‑attachment conditions and implanted into the DLSs via a negative pressure suction device...
October 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29152029/portable-detection-of-trace-metals-in-airborne-particulates-and-sediments-via-%C3%AE-pads-and-smartphone
#11
Yuan Jia, Hui Dong, Jianping Zheng, Hao Sun
Particulate matter (PM), a key indicator of air pollution by natural and anthropogenic activities, contributes to a wide spectrum of diseases that lead to a shortening of life expectancy. It has been recognized that trace metals in airborne PM are highly toxic and can be correlated with lesion in respiratory, gastrointestinal, immunological, and hematological systems. Traditional methods for trace metal assay require sophisticated instrumentations and highly trained operators in centralized laboratories. In this work, by integrating the technologies of microfluidic paper-based analytical devices, additive manufacturing, smartphone, and colorimetric sensing, we developed the first smartphone based paper microfluidic platform for portable, disposable, and quantitative measurements of cobalt (Co), copper (Cu), and iron (Fe) in ambient air and street sediments...
November 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/29151003/lung-ultrasound-in-the-critically-ill-luci-a-translational-discipline
#12
Daniel A Lichtenstein, Manu L N G Malbrain
In the early days of ultrasound, it was not a translational discipline. The heart was claimed by cardiologists, with others, such as gynaecologists, urologists and vascular surgeons claiming their part while the rest was given to radiologists. Only recently, ultrasound transgressed and crossed the usual borders between the different disciplines, such as emergency and critical care medicine. The advent of portable machines in the early 1980s, allowed the critical care physician to perform bedside ultrasound, and the development of whole body critical care ultrasound (CCUS) was born...
November 18, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/29149059/a-high-performance-portable-transient-electro-magnetic-sensor-for-unexploded-ordnance-detection
#13
Haofeng Wang, Shudong Chen, Shuang Zhang, Zhiwen Yuan, Haiyang Zhang, Dong Fang, Jun Zhu
Portable transient electromagnetic (TEM) systems can be well adapted to various terrains, including mountainous, woodland, and other complex terrains. They are widely used for the detection of unexploded ordnance (UXO). As the core component of the portable TEM system, the sensor is constructed with a transmitting coil and a receiving coil. Based on the primary field of the transmitting coil and internal noise of the receiving coil, the design and testing of such a sensor is described in detail. Results indicate that the primary field of the transmitting coil depends on the diameter, mass, and power of the coil...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29148705/li-desolvation-dictating-lithium-ion-battery-low-temperature-performances
#14
Qiuyan Li, Dongping Lu, Jianming Zheng, Shuhong Jiao, Langli Luo, Chongmin Wang, Kang Xu, Ji-Guang Zhang, Wu Xu
Lithium (Li) ion battery (LIB) has penetrated almost every aspects of human life, from portable electronics, vehicles to grids, and its operation stability in extreme environments becomes increasingly important. Among these, sub-zero temperature presents a kinetic challenge to the electrochemical reactions required to deliver the stored energy. In this work, we attempted to identify the rate-determining process for Li+ migration under such low temperatures, so that an optimum electrolyte formulation could be designed to maximize the energy output...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29145507/light-sensors-for-objective-light-measurement-in-ambulatory-polysomnography
#15
Rachel Schembri, Jo Spong, Allison Peters, Peter Rochford, Philip Wilksch, Fergal J O'Donoghue, Kenneth M Greenwood, Maree Barnes, Gerard A Kennedy, David J Berlowitz
Ambulatory polysomnography (PSG) does not commonly include an objective measure of light to determine the time of lights off (Loff), and thus cannot be used to calculate important indices such as sleep onset latency and sleep efficiency. This study examined the technical specifications and appropriateness of a prototype light sensor (LS) for use in ambulatory Compumedics Somte PSG.Two studies were conducted. The first examined the light measurement characteristics of the LS when used with a portable PSG device, specifically recording trace range, linearity, sensitivity, and stability...
2017: PloS One
https://www.readbyqxmd.com/read/29145052/a-comparison-of-personal-exposure-to-air-pollutants-in-different-travel-modes-on-national-highways-in-india
#16
Soma Sekhara Rao Kolluru, Aditya Kumar Patra, Satya Prakash Sahu
People often travel a long distance on highways to the nearest city for professional/business activities. However, relatively few publications on passenger exposure to pollutants on highways in India or elsewhere are available. The aim of this study was to examine the contribution of different travel modes to passengers' pollutant exposure for a long distance travel on a national highway in India. We measured PM2.5 and CO exposure levels of the passengers over 200km on a national highway using two portable air monitors, EVM-7 and EPAM-5000...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29144414/wear-behavior-and-microstructure-of-mg-sn-alloy-processed-by-equal-channel-angular-extrusion
#17
Jung-Hsuan Chen, Yen-Chen Shen, Chuen-Guang Chao, Tzeng-Feng Liu
Mg-5wt.% Sn alloy is often used in portable electronic devices and automobiles. In this study, mechanical properties of Mg-5wt.% Sn alloy processed by Equal Channel Angular Extrusion (ECAE) were characterized. More precisely, its hardness and wear behavior were measured using Vickers hardness test and a pin-on-disc wear test. The microstructures of ECAE-processed Mg-Sn alloys were investigated by scanning electron microscope and X-ray diffraction. ECAE process refined the grain sizes of the Mg-Sn alloy from 117...
November 16, 2017: Materials
https://www.readbyqxmd.com/read/29143363/utility-of-shear-wave-elastography-for-assessing-allograft-fibrosis-in-renal-transplant-recipients-a-pilot-study
#18
Heather M Early, Ellen C Cheang, Jorge M Aguilera, Jonah S W Hirschbein, Ghaneh Fananapazir, Machelle D Wilson, John P McGahan
OBJECTIVES: To evaluate the utility of ultrasound-based shear wave elastography (SWE) as a noninvasive method to accurately detect and potentially stage the severity of renal allograft fibrosis and assess its user reproducibility. METHODS: In this Institutional Review Board-approved, Health Insurance Portability and Accountability Act-compliant prospective study, 70 renal transplant recipients underwent an SWE evaluation of their allograft followed directly by biopsy...
November 16, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29143161/point-of-care-b-type-natriuretic-peptide-and-portable-echocardiography-for-assessment-of-patients-with-suspected-heart-failure-in-primary-care-rationale-and-design-of-the-three-part-handheld-bnp-program-and-results-of-the-training-study
#19
Caroline Morbach, Thomas Buck, Christian Rost, Sebastian Peter, Stephan Günther, Stefan Störk, Christiane Prettin, Raimund Erbel, Georg Ertl, Christiane E Angermann
BACKGROUND: Patients with suspected heart failure (HF) often present first to general practitioners (GPs). Timely and accurate HF diagnosis and reliable prognostic information have remained unmet goals in primary care, where patient evaluation often relies on clinical assessment only. The Handheld-BNP program investigates whether additional use of portable echocardiography (ECHO) and point-of-care determination of B-type natriuretic peptide (BNP) improves the accuracy of HF diagnosis and aids risk prediction in primary care...
November 15, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29142647/effects-of-staining-liquids-and-finishing-methods-on-translucency-of-a-hybrid-ceramic-material-having-two-different-translucency-levels
#20
Sebnem Ulviye Buyukkaplan, Mehmet Mustafa Özarslan, Çağatay Barutcigil, Merve Arslan, Kubilay Barutcigil, Elif Ece Yoldan
PURPOSE: Beverages may affect the translucency of esthetic dental restorative materials. The aim of the present study was to investigate the effects of coffee and red wine on the translucency of a PICN material with two translucency levels, and finished with different methods. MATERIALS AND METHODS: 2M2 high translucent and translucent VITA Enamic hybrid ceramic blocks were investigated. Rectangular specimens with the dimensions of 12 mm × 14 mm × 2 mm were prepared...
October 2017: Journal of Advanced Prosthodontics
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