keyword
MENU ▼
Read by QxMD icon Read
search

PIV

keyword
https://www.readbyqxmd.com/read/29344054/the-carnitine-status-does-not-affect-the-contractile-and-metabolic-phenotype-of-skeletal-muscle-in-pigs
#1
Daniel Kaup, Janine Keller, Erika Most, Joachim Geyer, Klaus Eder, Robert Ringseis
Background: Recently, supplementation of L-carnitine to obese rats was found to improve the carnitine status and to counteract an obesity-induced muscle fiber transition from type I to type II. However, it has not been resolved if the change of muscle fiber distribution induced in obese rats and the restoration of the "normal" muscle fiber distribution, which is found in lean rats, in obese rats by supplemental L-carnitine is causally linked with the carnitine status. In the present study we hypothesized that fiber type distribution in skeletal muscle is dependent on carnitine status...
2018: Nutrition & Metabolism
https://www.readbyqxmd.com/read/29341921/computational-hydrodynamic-comparison-of-a-mini-vessel-and-a-usp-2-dissolution-testing-system-to-predict-the-dynamic-operating-conditions-for-similarity-of-dissolution-performance
#2
Bing Wang, Gerard Bredael, Piero M Armenante
The hydrodynamics characteristics of a mini vessel and a USP 2 dissolution testing system were obtained and compared to predict the tablet-liquid mass transfer coefficient from velocity distributions near the tablet and establish the dynamic operating conditions under which dissolution in mini vessels could be conducted to generate concentration profiles similar to those in the USP 2. Velocity profiles were obtained experimentally using Particle Image Velocimetry (PIV). Computational Fluid Dynamics (CFD) was used to predict the velocity distribution and strain rate around a model tablet...
January 13, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29334389/effect-of-coordination-geometry-on-the-magnetic-properties-of-a-series-of-ln2-and-ln4-hydroxo-clusters
#3
Amaleswari Rasamsetty, Chinmoy Das, E Carolina Sañudo, Maheswaran Shanmugam, Viswanathan Baskar
A series of three isostructural tetranuclear complexes with the general molecular formula [Ln4(μ3-OH)4(L)4(μ2-piv)4(MeOH)4] (Ln = Gd 1, Dy 2 and Ho 3; LH = [1,3-bis(o-methoxyphenyl)-propane-1,3-dione]) were isolated and unambiguously characterized by single crystal XRD. Under similar reaction conditions, simply changing the co-ligand from pivalate to 2,6-bis(hydroxymethyl)-p-cresol (LH'3) led to the isolation of dinuclear Ln(iii) complexes with the general molecular formula [Ln2(L)4(μ2-LH'2)2]·4DMF (Ln = Gd 4, Dy 5 and Ho 6)...
January 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29328268/backscatter-particle-image-velocimetry-via-optical-time-of-flight-sectioning
#4
Megan E Paciaroni, Yi Chen, Kyle P Lynch, Daniel R Guildenbecher
Conventional particle image velocimetry (PIV) configurations require a minimum of two optical access ports, inherently restricting the technique to a limited class of flows. Here, the development and application of a novel method of backscattered time-gated PIV requiring a single-optical-access port is described along with preliminary results. The light backscattered from a seeded flow is imaged over a narrow optical depth selected by an optical Kerr effect (OKE) time gate. The picosecond duration of the OKE time gate essentially replicates the width of the laser sheet of conventional PIV by limiting detected photons to a narrow time-of-flight within the flow...
January 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29327237/regional-age-and-respiratory-secretion-specific-prevalence-of-respiratory-viruses-associated-with-asthma-exacerbation-a-literature-review
#5
REVIEW
Xue-Yan Zheng, Yan-Jun Xu, Wei-Jie Guan, Li-Feng Lin
Despite increased understanding of how viral infection is involved in asthma exacerbations, it is less clear which viruses are involved and to what extent they contribute to asthma exacerbations. Here, we sought to determine the prevalence of different respiratory viruses during asthma exacerbations. Systematic computerized searches of the literature up to June 2017 without language limitation were performed. The primary focus was on the prevalence of respiratory viruses, including AdV (adenovirus), BoV (bocavirus), CoV (coronavirus), CMV (cytomegalovirus), EnV (enterovirus), HSV (herpes simplex virus), IfV (influenza virus), MpV (metapneumovirus), PiV (parainfluenzavirus), RV (rhinovirus) and RSV (respiratory syncytial virus) during asthma exacerbations...
January 11, 2018: Archives of Virology
https://www.readbyqxmd.com/read/29323415/selecting-polychoric-instrumental-variables-in-confirmatory-factor-analysis-an-alternative-specification-test-and-effects-of-instrumental-variables
#6
Shaobo Jin, Chunzheng Cao
The polychoric instrumental variable (PIV) approach is a recently proposed method to fit a confirmatory factor analysis model with ordinal data. In this paper, we first examine the small-sample properties of the specification tests for testing the validity of instrumental variables (IVs). Second, we investigate the effects of using different numbers of IVs. Our results show that specification tests derived for continuous data are extremely oversized at all sample sizes when applied to ordinal variables. Possible modifications for ordinal data are proposed in the present study...
January 11, 2018: British Journal of Mathematical and Statistical Psychology
https://www.readbyqxmd.com/read/29305613/optimized-time-resolved-echo-piv-ptv-measurements-elucidate-blood-flow-in-patients-with-left-ventricular-thrombus
#7
Kaushik Sampath, Thura T Harfi, Ricard/T George, Joseph Katz
Contrast ultrasound is a widely used clinical tool to obtain real-time qualitative blood flow assessments in the heart, liver, etc. Echocardiographic particle image velocimetry (echo-PIV) is a technique for obtaining quantitative velocity maps from contrast ultrasound images. However, unlike optical PIV, routine echo images are prone to non-uniform spatiotemporal variations in tracer distribution, making analysis difficult for standard PIV algorithms. This study introduces optimized procedures that integrate image enhancement, PIV and particle tracking velocimetry (PTV) to obtain reliable time-resolved 2D velocity distributions...
January 5, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29300281/the-ios-have-it-a-prospective-observational-study-of-vascular-access-success-rates-in-patients-in-extremis-using-video-review
#8
Kristen M Chreiman, Ryan P Dumas, Mark J Seamon, Patrick K Kim, Patrick M Reilly, Lewis J Kaplan, Jason D Christie, Daniel N Holena
BACKGROUND: Quick and successful vascular access in injured patients arriving in extremis is crucial to enable early resuscitation and rapid OR transport for definitive repair. We hypothesized that intraosseous (IO) access would be faster and have higher success rates than peripheral IVs (PIVs) or central venous catheters (CVCs). METHODS: High-definition video recordings of resuscitations for all patients undergoing Emergency Department Thoracotomy (EDT) from 4/2016-7/2017 were reviewed as part of a quality improvement initiative...
January 4, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29288504/cell-therapy-with-allogenic-canine-periodontal-ligament-derived-cells-in-periodontal-regeneration-of-critical-size-defects
#9
J Nuñez, N Sanchez, F Vignoletti, I Sanz-Martin, R Caffesse, S Santamaria, J A Garcia-Sanz, M Sanz
AIM: The objective of this in-vivo experimental study to evaluate the regenerative potential of a cell therapy combining allogenic periodontal ligament derived cells with in a xenogeneic bone substitute in a similar experimental model. METHODS: In 9 beagle dogs, critical-size 6 mm supra-alveolar periodontal defects were created around the PIII and PIV. The resulting supra-alveolar defects were randomly treated with either 1.4 x 106 allogenic canine periodontal ligament-derived cells seeded on de-proteinized bovine bone mineral with 10% collagen (DBBM-C) (test group), or DBBM-C without cells (control group)...
December 29, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/29286423/an-analog-macroscopic-technique-for-studying-molecular-hydrodynamic-processes-in-dense-gases-and-liquids
#10
Jerry Dahlberg, Peter T Tkacik, Brigid Mullany, Eric Fleischhauer, Hossein Shahinian, Farzad Azimi, Jayesh Navare, Spencer Owen, Tucker Bisel, Tony Martin, Jodie Sholar, Russell G Keanini
An analog, macroscopic method for studying molecular-scale hydrodynamic processes in dense gases and liquids is described. The technique applies a standard fluid dynamic diagnostic, particle image velocimetry (PIV), to measure: i) velocities of individual particles (grains), extant on short, grain-collision time-scales, ii) velocities of systems of particles, on both short collision-time- and long, continuum-flow-time-scales, iii) collective hydrodynamic modes known to exist in dense molecular fluids, and iv) short- and long-time-scale velocity autocorrelation functions, central to understanding particle-scale dynamics in strongly interacting, dense fluid systems...
December 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29279451/epidemiology-of-respiratory-pathogens-in-children-with-lower-respiratory-tract-infections-in-shanghai-china-from-2013-to-2015
#11
Pengcheng Liu, Menghua Xu, Leiyan He, Liyun Su, Aimin Wang, Pan Fu, Lijuan Lu, Chuanqing Wang, Jin Xu
This study aimed to explore the epidemiology of pathogens in children who were hospitalized with lower respiratory tract infections (LRTIs) at the Children's Hospital of Fudan University, Shanghai, China. Children aged less than 18 years who were hospitalized with LRTIs were recruited from January 2013 to December 2015. Respiratory specimens were collected for the detection of common respiratory viruses, atypical bacteria and bacteria using current laboratory diagnostic tests. The epidemiological characteristics of the respiratory pathogens were analysed...
December 26, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29251535/validation-of-the-professional-identity-and-values-scale-among-an-athletic-trainer-population
#12
Christianne M Eason, Stephanie M Mazerolle, Craig R Denegar, Laura Burton, Jennifer McGarry
CONTEXT:   Forming a professional identity is a process by which an individual achieves an awareness of his or her own self-concept in with the context of the profession. Identity in relation to an individual's profession includes the ability to articulate the role as a professional and professional philosophy. Professional identity has been studied extensively in other fields, but currently no professional identity scales have been validated within the athletic training profession...
December 18, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29246199/possible-interference-between-seasonal-epidemics-of-influenza-and-other-respiratory-viruses-in-hong-kong-2014-2017
#13
Xueying Zheng, Zhengyu Song, Yapeng Li, Juanjuan Zhang, Xi-Ling Wang
BACKGROUND: Unlike influenza viruses, little is known about the prevalence and seasonality of other respiratory viruses because laboratory surveillance for non-influenza respiratory viruses is not well developed or supported in China and other resource-limited countries. We studied the interference between seasonal epidemics of influenza viruses and five other common viruses that cause respiratory illnesses in Hong Kong from 2014 to 2017. METHODS: The weekly laboratory-confirmed positive rates of each virus were analyzed from 2014 to 2017 in Hong Kong to describe the epidemiological trends and interference between influenza viruses, respiratory syncytial virus (RSV), parainfluenza virus (PIV), adenovirus, enterovirus and rhinovirus...
December 16, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29228581/a-multiplex-liquid-chip-assay-based-on-luminex-xmap-technology-for-simultaneous-detection-of-six-common-respiratory-viruses
#14
Yong Yan, Jian-Yong Luo, Yin Chen, Heng-Hui Wang, Guo-Ying Zhu, Pei-Yan He, Jin-Lei Guo, Yong-Liang Lei, Zhong-Wen Chen
We utilized one-step multiplex reverse transcription-PCR (RT-PCR) and Luminex xMAP technology to develop a respiratory multiplex liquid-chip assay (rMLA) for simultaneous detection of 6 common respiratory viruses, including influenza virus type A (FluA) and type B (FluB), para-influenza virus type 3 (PIV-3), respiratory syncytial virus (RSV), human metapneumovirus (MPV) and a threatening virus to China, Middle East Respiratory Syndrome coronavirus (MERS-CoV). Performance of rMLA was evaluated by comparing with real-time RT-PCR...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29221057/statistical-model-for-speckle-pattern-optimization
#15
Yong Su, Qingchuan Zhang, Zeren Gao
Image registration is the key technique of optical metrologies such as digital image correlation (DIC), particle image velocimetry (PIV), and speckle metrology. Its performance depends critically on the quality of image pattern, and thus pattern optimization attracts extensive attention. In this article, a statistical model is built to optimize speckle patterns that are composed of randomly positioned speckles. It is found that the process of speckle pattern generation is essentially a filtered Poisson process...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29195751/development-and-validation-of-a-phase-filtered-moving-ensemble-correlation-for-echocardiographic-particle-image-velocimetry
#16
Brett A Meyers, Craig J Goergen, Pavlos P Vlachos
A new processing method for echocardiographic particle image velocimetry (EchoPIV) using moving ensemble (ME) correlation with dynamic phase correlation filtering was developed to improve velocity measurement accuracy for routine clinical evaluation of cardiac function. The proposed method was tested using computationally generated echocardiogram images. Error analysis indicated that ME EchoPIV yields a twofold improvement in bias and random error over the current standard correlation method (βPairwise = -0...
November 28, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29168199/experimental-investigation-of-left-ventricular-flow-patterns-after-percutaneous-edge-to-edge-mitral-valve-repair
#17
Morteza Jeyhani, Shahrokh Shahriari, Michel Labrosse
Mitral valve percutaneous edge-to-edge repair (PEtER) is a viable solution in high-risk patients with severe symptomatic mitral regurgitation. However, the generated double-orifice configuration poses challenges for the evaluation of the hemodynamic performance of the mitral valve and may alter flow patterns in the left ventricle (LV) during diastole. This in vitro study aims to evaluate the hemodynamic modifications following a simulated PEtER. A custom-made mitral valve was developed, and two configurations were tested: (i) a single-orifice valve with mitral regurgitation and (ii) a double-orifice mitral valve configuration following PEtER...
November 23, 2017: Artificial Organs
https://www.readbyqxmd.com/read/29167081/randomized-trial-evaluating-the-effectiveness-of-a-leg-crossing-and-muscle-tensing-technique-on-decreasing-vasovagal-symptoms-among-pediatric-and-young-adult-patients-undergoing-peripheral-iv-catheter-insertion
#18
Laura McIntyre-Patton, Shannon Wanderski, Deb Graef, Laura Woessner, Rachel Baker
Peripheral intravenous (PIV) catheter insertion is a common procedure that can cause vasovagal symptoms. Lower extremity muscle tensing techniques decrease these symptoms in adults. However, there are no studies examining this technique in the pediatric population. OBJECTIVE: This study aims to determine whether pediatric patients are able to perform the technique and to determine the effects of this technique on vasovagal symptoms in a pediatric population. DESIGN, SETTING, PARTICIPANTS: A parallel-group randomized controlled trial was conducted with 28 patients cared for in a pediatric surgery unit...
October 28, 2017: Journal of Pediatric Nursing
https://www.readbyqxmd.com/read/29157863/structure-activity-relationship-study-of-aib-containing-amphipathic-helical-peptide-cyclic-rgd-conjugates-as-carriers-for-sirna-delivery
#19
Shun-Ichi Wada, Anna Takesada, Yurie Nagamura, Eri Sogabe, Rieko Ohki, Junsuke Hayashi, Hidehito Urata
The conjugation of Aib-containing amphipathic helical peptide with cyclo(-Arg-Gly-Asp-d-Phe-Cys-) (cRGDfC) at the C-terminus of the helix peptide (PI) has been reported to be useful for constructing a carrier for targeted siRNA delivery into cells. In order to explore structure-activity relationships for the development of potential carriers for siRNA delivery, we synthesized conjugates of Aib-containing amphipathic helical peptide with cRGDfC at the N-terminus (PII) and both the N- and C-termini (PIII) of the helical peptide...
November 10, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29157142/experimental-study-on-centerline-velocities-of-a-rectangular-capture-hood-under-realistic-conditions
#20
Xinjian He, Braxton V Lewis, Steven E Guffey
Capture hoods are an important component of a local ventilation system designed to reduce exposures to airborne contaminants. The velocity at any point along the centerline of the hood (Vx) is currently estimated using one of many predictive equations developed since the 1930's. It is unproven that those predictive equations for Vx are accurate, despite the prodigious number of studies concerning them. Among other issues, almost all experimental verifications were conducted for conditions that were either unrealistically ideal without competing air currents (e...
November 20, 2017: Journal of Occupational and Environmental Hygiene
keyword
keyword
71217
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"