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https://www.readbyqxmd.com/read/28813842/using-wearable-physiological-sensors-to-predict-energy-expenditure
#1
Kimberly A Ingraham, Daniel P Ferris, C David Remy
Lower-limb assistive robotic devices are often evaluated by measuring a reduction in the user's energy cost. Using indirect calorimetry to estimate energy cost is poorly suited for real-time estimation and long-term collection. The goal of this study was to use data from wearable sensors to predict energy cost with better temporal resolution and less variability than breath measurements. We collected physiological data (heart rate, electrodermal activity, skin temperature) and mechanical data (EMG, accelerometry) from three healthy subjects walking on a treadmill at various speeds on level ground, inclined, and backwards...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813427/electromagneto-squeezing-rotational-flow-of-carbon-c-water-h2o-kerosene-oil-nanofluid-past-a-riga-plate-a-numerical-study
#2
Tasawar Hayat, Mumtaz Khan, Muhammad Ijaz Khan, Ahmed Alsaedi, Muhammad Ayub
This article predicts the electromagneto squeezing rotational flow of carbon-water nanofluid between two stretchable Riga plates. Riga plate is known as electromagnetic actuator which is the combination of permanent magnets and a span wise aligned array of alternating electrodes mounted on a plane surface. Mathematical model is developed for the flow problem with the phenomena of melting heat transfer, viscous dissipation and heat generation/absorption. Water and kerosene oil are utilized as the base fluids whereas single and multi-wall carbon nanotubes as the nanomaterials...
2017: PloS One
https://www.readbyqxmd.com/read/28812023/use-of-a-polyethylene-bag-to-reduce-perioperative-regional-and-whole-body-heat-losses-in-low-birth-weight-neonates
#3
Pierre Tourneux, Estelle Durand, Amandine Pelletier, Laurent Ghyselen, Véronique Bach, Jean-Pierre Libert
In the delivery room, wrapping a low-birth-weight neonate (defined as ≤2.499 g) in a polyethylene bag reduces the risk of hypothermia. However, extended use of the bag (e.g., during neonatal surgery) might conceivably increase the risk of thermal stress and thus body overheating. Here, we assessed the efficacy of a polyethylene bag in infants assigned to wrap (W) or nonwrap (NW, control) groups during placement of a percutaneous vena cava catheter by applying a new mathematical model that calculates heat exchanges for covered and uncovered body segments...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28811665/optimization-of-storage-temperature-for-retention-of-undifferentiated-cell-character-of-cultured-human-epidermal-cell-sheets
#4
Catherine J Jackson, Sjur Reppe, Jon R Eidet, Lars Eide, Kim A Tønseth, Linda H Bergersen, Darlene A Dartt, May Griffith, Tor P Utheim
Cultured epidermal cell sheets (CES) containing undifferentiated cells are useful for treating skin burns and have potential for regenerative treatment of other types of epithelial injuries. The undifferentiated phenotype is therefore important for success in both applications. This study aimed to optimize a method for one-week storage of CES for their widespread distribution and use in regenerative medicine. The effect of storage temperatures 4 °C, 8 °C, 12 °C, 16 °C, and 24 °C on CES was evaluated...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811205/extraction-and-characterization-of-acid-soluble-and-pepsin-soluble-collagen-from-skin-of-loach-misgurnus-anguillicaudatus
#5
Jing Wang, Xinli Pei, Haiying Liu, Dan Zhou
Acid-soluble collagen (ASC) and pepsin-soluble collagen (PSC) were extracted from loach skin. The yields of ASC and PSC were 22.42% and 27.32%, respectively. Sodium dodecyl sulfate-polyacrylamide-gel electrophoresis and peptide mass fingerprint analysis revealed that loach skin contained type I collagen. There were 212 imino acids/1000 residues in ASC and 193 imino acids/1,000 residues in PSC. Fourier transform infrared spectrometry analysis, UV measurements and circular dichroism confirmed that loach skin collagen had a triple helical structure...
August 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28810960/talk-to-the-hand-u-s-army-biophysical-testing
#6
William R Santee, Adam W Potter, Karl E Friedl
BACKGROUND: Many people are unaware of the science underlying the biophysical properties of Soldier clothing and personal protective equipment, yet there is a well-refined biomedical methodology initiated by Army physiologists in World War II. This involves a methodical progression of systematic material testing technologies, computer modeling, and human testing that enables more efficient development and rapid evaluation of new concepts for Soldier health and performance. Sophisticated manikins that sweat and move are a central part of this testing continuum...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810682/effects-of-known-determinants-on-methylene-bisphenyl-isocyanate-mdi-concentration-during-spray-on-truck-bed-lining-processes
#7
Nicholas C Schaal, William J Brazile, Katie L Finnie, James P Tiger
Background: Occupational exposure to methylene bisphenyl isocyanate (MDI) presents serious worker health concerns as it may lead to short- and long-term health effects such as asthma, airway irritation, hypersensitivity pneumonitis, and irritation of skin and mucous membranes. While studies of worker isocyanate exposures during vehicle painting activities are widespread, few studies have investigated the spray-on truck bed-liner (STBL) industry. The purpose of this study was to determine the effectiveness of several ventilation system variables and process characteristics in controlling MDI concentrations in the STBL industry...
August 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28809824/creation-and-transplantation-of-an-adipose-derived-stem-cell-asc-sheet-in-a-diabetic-wound-healing-model
#8
Yuka Kato, Takanori Iwata, Kaoru Washio, Toshiyuki Yoshida, Hozue Kuroda, Shunichi Morikawa, Mariko Hamada, Kazuki Ikura, Nobuyuki Kaibuchi, Masayuki Yamato, Teruo Okano, Yasuko Uchigata
Artificial skin has achieved considerable therapeutic results in clinical practice. However, artificial skin treatments for wounds in diabetic patients with impeded blood flow or with large wounds might be prolonged. Cell-based therapies have appeared as a new technique for the treatment of diabetic ulcers, and cell-sheet engineering has improved the efficacy of cell transplantation. A number of reports have suggested that adipose-derived stem cells (ASCs), a type of mesenchymal stromal cell (MSC), exhibit therapeutic potential due to their relative abundance in adipose tissue and their accessibility for collection when compared to MSCs from other tissues...
August 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28809050/versatile-chromatographic-method-for-catechin-determination-in-development-of-topical-formulations-containing-natural-extracts
#9
Ricardo Ferreira-Nunes, Tamara Angelo, Sandra Márcia Mazutti da Silva, Pérola Oliveira Magalhães, Tais Gratieri, Marcílio Sérgio Soares da Cunha-Filho, Guilherme Martins Gelfuso
Catechin is found in several natural sources, as Eugenia dysenterica and Syzygium cumini extracts. Its antioxidant and UV-protective properties suggest a potential use in cosmetic and dermatological formulations. A simple analytical method capable of giving support to experiments performed along the development of topical formulations containing this natural substance (i.e., drug assay, skin permeation and stability studies), however, is still demanded. Thus, this work aimed to develop and validate a selective HPLC method for catechin determination during the development of topical formulations...
August 15, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28805919/cows-exposed-to-heat-stress-during-fetal-life-exhibit-improved-thermal-tolerance
#10
B M S Ahmed, U Younas, T O Asar, S Dikmen, P J Hansen, G E Dahl
Maternal heat stress during late gestation affects calf function during postnatal life. The objective of the present study was to evaluate whether calves that experience heat stress in utero have altered thermoregulatory responses to acute heat stress later in life. Specifically, the hypothesis was that heat stress in utero would improve the response to acute heat stress at maturity. Females were born to dams exposed to heat stress or cooled during late gestation preceding their birth. All animals were raised postnatally under identical management...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28802661/efficacy-of-isolated-limb-perfusion-ilp-in-patients-with-merkel-cell-carcinoma-mcc-a-multicenter-experience
#11
L M van Veenendaal, M F Madu, M E T Tesselaar, C Verhoef, D J Grünhagen, A C J van Akkooi
BACKGROUND: Merkel cell carcinoma (MCC) is a rare and potentially aggressive neuroendocrine tumor of the skin, with a propensity for locoregional metastases. In two expert referral centers, isolated limb perfusion (ILP) is used to obtain locoregional control in selected locoregionally advanced MCC patients. This study describes our experience. METHOD: Patients who underwent ILP for MCC were analyzed. ILP was performed with melphalan and tumor necrosis factor (TNF) combination therapy...
August 3, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28801096/a-comparative-study-of-the-properties-and-self-aggregation-behavior-of-collagens-from-the-scales-and-skin-of-grass-carp-ctenopharyngodon-idella
#12
Yaowen Liu, Donghui Ma, Yihao Wang, Wen Qin
Collagens were extracted from the scales and skin of Ctenopharyngodon idella (C. idella) as raw materials using an acid-enzyme hybrid method. The structural properties of the extracted collagens were compared using ultraviolet-visible spectrophotometry, Fourier transform infrared spectroscopy, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and differential scanning calorimetry. Additionally, the in vitro self-aggregation behaviors of the two types of collagens (fish skin- and scale-derived collagens) were compared using turbidimetric assays, aggregation assays, and scanning electron microscopy (SEM)...
August 8, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28801070/methodological-considerations-for-the-temporal-summation-of-second-pain
#13
Nathanial R Eckert, Charles J Vierck, Corey B Simon, Sachell Calderon, Yenisel Cruz-Almeida, Roland Staud, Roger B Fillingim, Joseph L Riley
Temporal summation of second pain (TSSP) is a psychophysical indication of a central pain encoding mechanism, potentially enhanced in pathological pain conditions. Low frequency repetitive stimulation of unmyelinated (C) nociceptors results in a progressive increase of pain intensity when thermal stimulation intensity remains constant. However, when using different methods of nociceptive delivery to the skin, both regularity and rate of pain enhancement with repetition varies between experiments. Specifically, repetitive ramping up and down from a neutral to a painful temperature has produced weak and inconsistent pain summation...
August 8, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28800828/culture-dependent-and-culture-independent-assessment-of-spoilage-community-growth-on-vp-lamb-meat-from-packaging-to-past-end-of-shelf-life
#14
Mandeep Kaur, Hongshan Shang, Mark Tamplin, Tom Ross, John P Bowman
Packaging and storage temperature are important factors that influence the shelf-life of vacuum packed (VP) meat. In this study the shelf-life of VP bone-in lamb hind shanks stored at 8 °C and -1.2 °C was determined in parallel to analyses of starting and eventual spoilage bacterial communities via Illumina MiSeq based 16S rRNA amplicon sequencing. The mean total viable counts (TVC) and lactic acid bacterial viable counts (LAB) were observed to increase to log 7.5 CFU/cm(2) and 7 CFU/cm(2) after 6 and 42 days at 8 °C and -1...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28800725/a-novel-thermal-compression-device-for-perioperative-warming-a-randomized-trial-for-feasibility-and-efficacy
#15
Peter Luke Santa Maria, Chloe Santa Maria, Andreas Eisenried, Nathalia Velasquez, Brian Thomas Kannard, Abhinav Ramani, David Mark Kahn, Amanda Jane Wheeler, John Gerhard Brock-Utne
BACKGROUND: Inadvertent perioperative hypothermia (IPH) leads to surgical complications and increases length of stay. IPH rates are high with the current standard of care, forced air warming (FAW). Our hypothesis is that a prototype thermal compression device that heats the popliteal fossa and soles of the feet, with lower leg compression, increases perioperative temperatures and reduces IPH compared to the current standard of care. METHODS: Thirty six female breast surgery patients, at a tertiary academic hospital, were randomized to the device or intraoperative FAW (stage I) with a further 18 patients randomized to the device with a single heating area only (stage II, popliteal fossa or sole of the feet)...
August 11, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28800322/relationship-between-skin-blood-flow-regulation-mechanisms-and-vascular-endothelial-growth-factor-in-patients-with-metabolic-syndrome
#16
E Smirnova, S Shulkina, E Loran, S Podtaev, N Antonova
The focus of this paper is the determination of endothelial dysfunction in patients with metabolic syndrome (MetS) and the establishment of a relationship between the traditional biomarkers of endothelial dysfunction and the vascular tone regulation indices obtained from indirect cold tests in MetS patients. Our investigation was conducted on 30 patients aged 45.5±9 years. The control group comprised 14 healthy subjects aged 48.2±2.4 years. The mechanism of vascular tone regulation was investigated using the wavelet analysis of skin temperature oscillations (WAST)...
August 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28799651/thermal-mapping-on-male-genital-and-skin-tissues-of-laptop-thermal-sources-and-electromagnetic-interaction
#17
Mahdi Safari, Navid Mosleminiya, Ali Abdolali
Since the development of communication devices and expansion of their applications, there have been concerns about their harmful health effects. The main aim of this study was to investigate laptop thermal effects caused by exposure to electromagnetic fields and thermal sources simultaneously; propose a nondestructive, replicable process that is less expensive than clinical measurements; and to study the effects of positioning any new device near the human body in steady state conditions to ensure safety by U...
August 11, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28798503/working-up-a-good-sweat-the-challenges-of-standardising-sweat-collection-for-metabolomics-analysis
#18
REVIEW
Joy N Hussain, Nitin Mantri, Marc M Cohen
INTRODUCTION: Human sweat is a complex biofluid of interest to diverse scientific fields. Metabolomics analysis of sweat promises to improve screening, diagnosis and self-monitoring of numerous conditions through new applications and greater personalisation of medical interventions. Before these applications can be fully developed, existing methods for the collection, handling, processing and storage of human sweat need to be revised. This review presents a cross-disciplinary overview of the origins, composition, physical characteristics and functional roles of human sweat, and explores the factors involved in standardising sweat collection for metabolomics analysis...
February 2017: Clinical Biochemist. Reviews
https://www.readbyqxmd.com/read/28798200/wearable-physiological-monitoring-for-human-thermal-work-strain-optimization
#19
Mark J Buller, Alexander Pearson Welles, Karl E Friedl
Safe performance limits of soldiers and athletes have typically relied on predictive work-rest models of ambient conditions, average work intensity, and characteristics of the population. Bioengineering advances in noninvasive sensor technologies including miniaturization, reduced cost, power requirements, and comfort now make it possible to produce individual predictions of safe thermal-work limits. These precision medicine assessments depend on the development of thoughtful algorithms based on physics and physiology...
August 10, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28796650/using-skin-gene-markers-for-estimating-early-postmortem-interval-at-different-temperatures
#20
Mona Mohamed Ali, Samah Fathy Ibrahim, Amel Ahmed Fayed
Many researches document long-term RNA persistence in a variety of tissues and its applicability in estimating the postmortem interval (PMI). Skin-specific mRNA marker, late cornified envelope 1C (LCE1C), was used to identified skin samples. Before using the LCE1C in criminal casework, its persistence and applicability for estimating PMI in different temperatures were tested. Twelve skin samples were collected from 6 patients, and 6 samples were kept at 24°C and others were kept at 40°C for 5 days. The expression levels of LCE1C mRNA are serially detected and quantified using real-time polymerase chain reaction...
August 8, 2017: American Journal of Forensic Medicine and Pathology
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