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https://www.readbyqxmd.com/read/28944473/photography-and-social-media-use-in-community-based-participatory-research-with-youth-ethical-considerations
#1
Maryam Kia-Keating, Diana Santacrose, Sabrina Liu
Community-based participatory researchers increasingly incorporate photography and social media into their work. Despite its relative infancy, social media has created a powerful network that allows individuals to convey messages quickly to a widespread audience. In addition to its potential benefits, the use of social media in research also carries risk, given the fast pace of exchanges, sharing of personal images and ideas in high accessibility, low privacy contexts and continually shifting options and upgrades...
September 25, 2017: American Journal of Community Psychology
https://www.readbyqxmd.com/read/28943859/job-crafting-older-workers-mechanism-for-maintaining-person-job-fit
#2
Carol M Wong, Lois E Tetrick
Aging at work is a dynamic process. As individuals age, their motives, abilities and values change as suggested by life-span development theories (Lang and Carstensen, 2002; Kanfer and Ackerman, 2004). Their growth and extrinsic motives weaken while intrinsic motives increase (Kooij et al., 2011), which may result in workers investing their resources in different areas accordingly. However, there is significant individual variability in aging trajectories (Hedge et al., 2006). In addition, the changing nature of work, the evolving job demands, as well as the available opportunities at work may no longer be suitable for older workers, increasing the likelihood of person-job misfit...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28942995/development-and-validation-of-a-high-throughput-method-for-determination-of-nine-fluoroquinolones-residues-in-muscle-of-different-animal-species-by-liquid-chromatography-coupled-to-tandem-mass-spectrometry-with-low-temperature-clean-up
#3
Fabiano Barreto, Cristina B D Ribeiro, Rodrigo Barcellos Hoff, Teresa Dalla Costa
This work describes the development and validation of a quantitative and confirmatory method to determination of nine fluoroquinolones residues in poultry, bovine, swine and fish muscle using LC-MS/MS. Sample preparation was based in a fast solvent extraction with acetonitrile with 1% of formic acid followed by a low-temperature clean up procedure and centrifugation, without further steps. The recoveries ranged between 79% and 115%. The concentration work range was 0-200μgkg(-1). The LOD and LOQ were 5 and 10μgkg(-1), respectively...
September 18, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28942029/chemotherapy-for-advanced-her2-negative-breast-cancer-can-one-algorithm-fit-all
#4
REVIEW
F Miglietta, M V Dieci, G Griguolo, V Guarneri, P F Conte
HER2negative (HER2-) metastatic breast cancer (MBC) represents a challenging scenario for clinicians due to its great biological and clinical heterogeneity. Although management of HER2-MBC currently relies on several options, CT still remains a worthwhile strategy to be exploited. However, to date, there is not an univoque algorithm capable of guiding the choice of the proper CT agent/regimen, sequence and duration. Evidence from randomized clinical trials (RCT) and meta-analyses can actually help guiding the decision making process, however the definition of a standard of care for all HER2-MBC patients may be impractical, also in the light of the identification of new promising molecular and immunotherapeutic agents...
September 15, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28941880/alternative-theories-pregnancy-and-immune-tolerance
#5
Elizabeth A Bonney
For some time, reproductive immunologists have worked to understand the balance between maternal tolerance of the fetus, maternal health, and fetal protection which leads to successful pregnancy in mammalian species. We have always understood the potential importance of multiple factors, including nutrition, genetics, anatomy, hormonal regulation, environmental insult and many others. Yet, we still struggle to combine our knowledge of these factors and immunology to finally understand complex diseases of pregnancy, such as preeclampsia...
September 18, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28941718/a-multi-year-study-of-voc-emissions-at-a-chemical-waste-disposal-facility-using-mobile-apci-ms-and-lpci-ms-instruments
#6
Robert M Healy, QingFeng Chen, Julie Bennett, Nicholas S Karellas
Real-time analysis of volatile organic compounds (VOCs) in air is useful both for source identification and emissions compliance applications. In this work, two complementary triple quadrupole mass spectrometers, fitted with an atmospheric pressure chemical ionization (APCI) and a low pressure chemical ionization (LPCI) source, respectively, were deployed simultaneously to investigate emissions of VOCs associated with an Ontario-based chemical waste disposal facility. Mobile measurements performed upwind and downwind of the facility enabled selection of the best locations for stationary sampling...
September 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28940334/uncovering-a-third-dissolved-phase-129-xe-resonance-in-the-human-lung-quantifying-spectroscopic-features-in-healthy-subjects-and-patients-with-idiopathic-pulmonary-fibrosis
#7
Scott H Robertson, Rohan S Virgincar, Elianna A Bier, Mu He, Geoffrey M Schrank, Rose Marie Smigla, Craig Rackley, H Page McAdams, Bastiaan Driehuys
PURPOSE: The purpose of this work was to accurately characterize the spectral properties of hyperpolarized (129) Xe in patients with idiopathic pulmonary fibrosis (IPF) compared to healthy volunteers. METHODS: Subjects underwent hyperpolarized (129) Xe breath-hold spectroscopy, during which 38 dissolved-phase free induction decays (FIDs) were acquired after reaching steady state (echo time/repetition time = 0.875/50 ms; bandwidth = 8.06 kHz; flip angle≈22 °)...
October 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28940092/physical-activity-and-the-risk-of-hip-fracture-in-the-elderly-a-prospective-cohort-study
#8
Ylva Trolle Lagerros, Essi Hantikainen, Karl Michaëlsson, Weimin Ye, Hans-Olov Adami, Rino Bellocco
Physical activity has been inversely associated with the risk of hip fracture, however, few studies have been conducted on the contributions from different domains of physical activity. This study was performed to investigate the association between daily household activities, leisure time physical activity, work-related physical activity and total physical activity during a 24-h period, and the risk of hip fracture. In the Swedish National March Cohort we followed 23,881 men and women aged of 50 and over from 1997 until 2010...
September 22, 2017: European Journal of Epidemiology
https://www.readbyqxmd.com/read/28938847/a-new-hand-eye-calibration-approach-for-fracture-reduction-robot
#9
Lifeng Wang, Tianmiao Wang, Peifu Tang, Lei Hu, Wenyong Liu, Zhonghao Han, Ming Hao, Hongpeng Liu, Kun Wang, Yanpeng Zhao, Na Guo, Yanxiang Cao, Changsheng Li
OBJECTIVE: The hand-eye calibration is used to determine the transformation between the end-effector and the camera marker of the robot. But the robot movement in traditional method would be time-consuming, inaccurate and even unavailable in some conditions. The method presented in this article can complete the calibration without any movement and is more suitable in clinical applications. METHODS: Instead of solving the classic non-linear equation AX = XB, we collected the points on X and Y axes of the tool coordinate system (TCS) with the visual probe and fitted them using the singular value decomposition algorithm (SVD)...
September 22, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/28938819/a-general-method-for-the-derivation-of-the-functional-forms-of-the-effective-energy-terms-in-coarse-grained-energy-functions-of-polymers-ii-backbone-local-potentials-of-coarse-grained-o1%C3%A2-4-bonded-polyglucose-chains
#10
Emilia A Lubecka, Adam Liwo
Based on the theory of the construction of coarse-grained force fields for polymer chains described in our recent work [A. K. Sieradzan et al., J. Chem. Phys. 146, 124106 (2017)], in this work effective coarse-grained potentials, to be used in the SUGRES-1P model of polysaccharides that is being developed in our laboratory, have been determined for the O⋯O⋯O virtual-bond angles (θ) and for the dihedral angles for rotation about the O⋯O virtual bonds (γ) of 1 → 4-linked glucosyl polysaccharides, for all possible combinations of [α,β]-[d,l]-glucose...
September 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28938813/spectroscopic-properties-of-photosystem-ii-reaction-center-revisited
#11
Andrius Gelzinis, Darius Abramavicius, Jennifer P Ogilvie, Leonas Valkunas
Photosystem II (PSII) is the only biological system capable of splitting water to molecular oxygen. Its reaction center (RC) is responsible for the primary charge separation that drives the water oxidation reaction. In this work, we revisit the spectroscopic properties of the PSII RC using the complex time-dependent Redfield (ctR) theory for optical lineshapes [A. Gelzinis et al., J. Chem. Phys. 142, 154107 (2015)]. We obtain the PSII RC model parameters (site energies, disorder, and reorganization energies) from the fits of several spectra and then further validate the model by calculating additional independent spectra...
September 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28937917/head-impact-exposure-measured-in-a-single-youth-football-team-during-practice-drills
#12
Mireille E Kelley, Joeline M Kane, Mark A Espeland, Logan E Miller, Alexander K Powers, Joel D Stitzel, Jillian E Urban
OBJECTIVE This study evaluated the frequency, magnitude, and location of head impacts in practice drills within a youth football team to determine how head impact exposure varies among different types of drills. METHODS On-field head impact data were collected from athletes participating in a youth football team for a single season. Each athlete wore a helmet instrumented with a Head Impact Telemetry (HIT) System head acceleration measurement device during all preseason, regular season, and playoff practices...
September 12, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28935007/an-international-survey-of-approaches-to-chair-restraint-of-nonhuman-primates
#13
Jennifer L McMillan, Mollie A Bloomsmith, Mark J Prescott
Specifically designed restraint chairs are the preferred method of restraint for research studies that require NHP to sit in place for sustained periods of time. In light of increasing emphasis on refinement of restraint to improve animal wellbeing, it is important to have a better understanding of this potentially stressful procedure. Although chair restraint is used internationally, very little published information is available on this subject. We developed a survey to obtain an overview of equipment, procedures, and plans for improvement regarding chair restraint...
October 1, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28933837/a-quartz-crystal-microbalance-model-for-quantitatively-probing-the-deformation-of-adsorbed-particles-at-low-surface-coverage
#14
Jurriaan J J Gillissen, Joshua Alexander Jackman, Seyed R Tabaei, Bo Kyeong Yoon, Nam-Joon Cho
Characterizing the deformation of nanoscale, soft-matter particulates at solid-liquid interfaces is a demanding task, and there are limited experimental options to perform quantitative measurements in a non-perturbative manner. Previous attempts, based on the quartz crystal microbalance (QCM) technique, focused on the high surface coverage regime and modeled the adsorbed particles as a homogeneous film, while not considering the coupling between particles and surrounding fluid and hence resulting in an underestimation of the known particle height...
September 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28933497/use-of-nh-a-3-%C3%AE-x-3-%C3%AE-sonoluminescence-for-diagnostics-of-nonequilibrium-plasma-produced-by-multibubble-cavitation
#15
Rachel Pflieger, Temim Ouerhani, Thierry Belmonte, Sergey I Nikitenko
In this work, the sonoluminescence of NH radicals has been evaluated as a new spectroscopic probe for the nonequilibrium plasma produced by multibubble cavitation in liquids. The experiments were performed in aqueous ammonia solutions subjected to power ultrasound at low and high frequencies and under two different rare gases (Ar and Xe). Sonoluminescence (SL) spectroscopy focuses on the emission of the two present systems: NH (A(3)Π-X(3)Σ(-)) and OH (A(2)Σ(+)-X(2)Π). Both spectroscopic systems indicate the absence of thermal equilibrium during bubble collapse (Tv > Tr) irrespective of the saturating gas...
September 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28931946/comparison-of-perfusion-models-for-quantitative-t1-weighted-dce-mri-of-rectal-cancer
#16
Tanja Gaa, Wiebke Neumann, Sonja Sudarski, Ulrike I Attenberger, Stefan O Schönberg, Lothar R Schad, Frank G Zöllner
In this work, the two compartment exchange model and two compartment uptake model were applied to obtain quantitative perfusion parameters in rectum carcinoma and the results were compared to those obtained by the deconvolution algorithm. Eighteen patients with newly diagnosed rectal carcinoma underwent 3 T MRI of the pelvis including a T1 weighted dynamic contrastenhanced (DCE) protocol before treatment. Mean values for Plasma Flow (PF), Plasma Volume (PV) and Mean Transit Time (MTT) were obtained for all three approaches and visualized in parameter cards...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931873/characterization-of-methane-excess-and-absolute-adsorption-in-various-clay-nanopores-from-molecular-simulation
#17
Yuanyuan Tian, Changhui Yan, Zhehui Jin
In this work, we use grand canonical Monte Carlo (GCMC) simulation to study methane adsorption in various clay nanopores and analyze different approaches to characterize the absolute adsorption. As an important constituent of shale, clay minerals can have significant amount of nanopores, which greatly contribute to the gas-in-place in shale. In previous works, absolute adsorption is often calculated from the excess adsorption and bulk liquid phase density of absorbate. We find that methane adsorbed phase density keeps increasing with pressure up to 80 MPa...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28929924/the-search-for-a-subtype-selective-pet-imaging-agent-for-the-gabaa-receptor-complex-evaluation-of-the-radiotracer-11-c-ado-in-nonhuman-primates
#18
Shu-Fei Lin, Frederic Bois, Daniel Holden, Nabeel Nabulsi, Richard Pracitto, Hong Gao, Michael Kapinos, Jo-Ku Teng, Anupama Shirali, Jim Ropchan, Richard E Carson, Charles S Elmore, Neil Vasdev, Yiyun Huang
The myriad physiological functions of γ-amino butyric acid (GABA) are mediated by the GABA-benzodiazepine receptor complex comprising of the GABAA, GABAB, and GABAC groups. The various GABAA subunits with region-specific distributions in the brain subserve different functional and physiological roles. For example, the sedative and anticonvulsive effects of classical benzodiazepines are attributed to the α1 subunit, and the α2 and α3 subunits mediate the anxiolytic effect. To optimize pharmacotherapies with improved efficacy and devoid of undesirable side effects for the treatment of anxiety disorders, subtype-selective imaging radiotracers are required to assess target engagement at GABA sites and determine the dose-receptor occupancy relationships...
January 2017: Molecular Imaging
https://www.readbyqxmd.com/read/28929903/predictors-of-hearing-aid-outcomes
#19
Enrique A Lopez-Poveda, Peter T Johannesen, Patricia Pérez-González, José L Blanco, Sridhar Kalluri, Brent Edwards
Over 360 million people worldwide suffer from disabling hearing loss. Most of them can be treated with hearing aids. Unfortunately, performance with hearing aids and the benefit obtained from using them vary widely across users. Here, we investigate the reasons for such variability. Sixty-eight hearing-aid users or candidates were fitted bilaterally with nonlinear hearing aids using standard procedures. Treatment outcome was assessed by measuring aided speech intelligibility in a time-reversed two-talker background and self-reported improvement in hearing ability...
January 2017: Trends in Hearing
https://www.readbyqxmd.com/read/28929631/accelerated-wound-healing-on-skin-by-electrical-stimulation-with-a-bioelectric-plaster
#20
Hiroyuki Kai, Takeshi Yamauchi, Yudai Ogawa, Ayaka Tsubota, Takahiro Magome, Takeo Miyake, Kenshi Yamasaki, Matsuhiko Nishizawa
Wound healing on skin involves cell migration and proliferation in response to endogenous electric current. External electrical stimulation by electrical equipment is used to promote these biological processes for the treatment of chronic wounds and ulcers. Miniaturization of the electrical stimulation device for wound healing on skin will make this technology more widely available. Using flexible enzymatic electrodes and stretchable hydrogel, a stretchable bioelectric plaster is fabricated with a built-in enzymatic biofuel cell (EBFC) that fits to skin and generates ionic current along the surface of the skin by enzymatic electrochemical reactions for more than 12 h...
September 20, 2017: Advanced Healthcare Materials
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