keyword
MENU ▼
Read by QxMD icon Read
search

Acoustic

keyword
https://www.readbyqxmd.com/read/28345380/comparative-study-of-ultraviolet-laser-based-time-resolved-photoacoustic-fingerprint-spectra-and-thermal-decomposition-mechanisms-of-energetic-1-2-3-1h-triazole-derivatives-under-controlled-pyrolysis
#1
Konda Srinivasa Rao, Anil Kumar Chaudhary
We report the comparative study of photoacoustic (PA) fingerprint spectra, thermal decomposition, and stability mechanism of some phenyl and bis series energetic compounds named 1-(2-methoxy,-3,5-dinitrophenyl)-1H-1,2,3-triazole ( S5), 1-(3-methoxy, 2, 6 dinitrophenyl) 1H-1, 2, 3 triazole ( S10), 1-(4-nitrophenyl)-1H-1,2,3-triazole ( S8), and 2,6-bis ((4-(nitromethyl)-1H-1,2,3-triazol-1-yl)methyl) pyridine ( S9). Fourth harmonic wavelength, i.e., 266 nm of pulse duration 7 ns and 10 Hz repetition rate obtained from Q-switched Nd: YAG laser, was used to record the thermal PA spectra of these compounds under controlled pyrolysis condition in the range of 30-350 ℃...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28344397/comparative-study-of-obstructive-urolithiasis-and-its-sequelae-in-buffalo-calves
#2
Yasmin H Bayoumi, Noura E Attia
AIM: The present work was designed to study the incidence of obstructive urolithiasis and to apply comparative diagnosis to urine retention cases. MATERIALS AND METHODS: A total of 78 non-castrated buffalo calves aging 3-11 months were included in this study, 68 calves were admitted to the Veterinary Teaching Hospital, Zagazig University, Egypt, during the study period with a history of anuria, and they were classified into three groups; intact bladder group (19 calves), uroperitoneum group (45 calves), and ruptured urethra group (4 calves)...
February 2017: Veterinary World
https://www.readbyqxmd.com/read/28343920/impact-of-insurance-status-and-race-on-receipt-of-treatment-for-acoustic-neuroma-a-national-cancer-database-analysis
#3
Shearwood McClelland, Ellen Kim, James D Murphy, Jerry J Jaboin
Acoustic neuroma (AN) management involves surgery, radiation, or observation. Previous studies have demonstrated that patient race and insurance status impact in-hospital morbidity/mortality following surgery; however the nationwide impact of these demographics on the receipt of each treatment modality has not been examined. The National Cancer Data Base (NCDB) from 2004 to 2013 identified AN patients. Multivariate analysis adjusted for several variables within each treatment modality, including patient age, race, sex, income, primary payer for care, tumor size, and medical comorbidities...
March 23, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28343884/short-term-desensitization-of-fast-escape-behavior-associated-with-suppression-of-mauthner-cell-activity-in-larval-zebrafish
#4
Megumi Takahashi, Maya Inoue, Masashi Tanimoto, Tsunehiko Kohashi, Yoichi Oda
Escape is among the simplest animal behaviors employed to study the neural mechanisms underlying learning. Teleost fishes exhibit behavioral learning of fast escape initiated with a C-shaped body bend (C-start). C-starts are subdivided into short-latency (SLC) and long-latency (LLC) types in larval zebrafish. Whether these two can be separately modified, and the neural correlates of this modification, however, remains undetermined. We thus performed Ca(2+) imaging of Mauthner (M-) cells, a pair of giant hindbrain neurons constituting a core element of SLC circuit, during behavioral learning in larval zebrafish...
March 23, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28343741/time-as-context-the-influence-of-hierarchical-patterning-on-sensory-inference
#5
Juanita Todd, Anne Petherbridge, Bronte Speirs, Alexander Provost, Bryan Paton
Time, or more specifically temporal structure, is a critical variable in understanding how the auditory system uses acoustic patterns to predict input, and to filter events based on their relevance. A key index of this filtering process is the auditory evoked potential component known as mismatch negativity or MMN. In this paper we review findings of smaller MMN in schizophrenia through the lens of time as an influential contextual variable. More specifically, we review studies that show how MMN to a locally rare pattern-deviation is modulated by the longer-term context in which it occurs...
March 23, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28343660/a-pilot-study-of-ultrasound-elastography-as-a-non-invasive-method-to-monitor-liver-disease-in-children-with-short-bowel-syndrome
#6
Daniel Lodwick, Molly Dienhart, Jennifer N Cooper, Bonita Fung, Joseph Lopez, Sally Smith, Patrick Warren, Jane Balint, Peter C Minneci
BACKGROUND: Our objective was to evaluate the accuracy of acoustic radiation force impulse (ARFI) elastography in determining extent of liver fibrosis in pediatric patients with short bowel syndrome (SBS). METHODS: This prospective cohort study included pediatric patients with SBS who underwent ultrasound with ARFI measurements of shear wave speed (SWS) and liver biopsy within 30days of each other between 12/2014-9/2015. The mean and median SWS were compared to the stage of fibrosis...
March 16, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28343560/acoustic-levitation-of-liquid-drops-dynamics-manipulation-and-phase-transitions
#7
REVIEW
Duyang Zang, Yinkai Yu, Zhen Chen, Xiaoguang Li, Hongjing Wu, Xingguo Geng
The technique of acoustic levitation normally produces a standing wave and the potential well of the sound field can be used to trap small objects. Since no solid surface is involved it has been widely applied for the study of fluid physics, nucleation, bio/chemical processes, and various forms of soft matter. In this article, we survey the works on drop dynamics in acoustic levitation, focus on how the dynamic behavior is related to the rheological properties and discuss the possibility to develop a novel rheometer based on this technique...
March 18, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28343102/acoustic-and-hybrid-3d-printed-electrochemical-biosensors-for-the-real-time-immunodetection-of-liver-cancer-cells-hepg2
#8
Samar Damiati, Seta Küpcü, Martin Peacock, Christoph Eilenberger, Mazin Zamzami, Ishtiaq Qadri, Hani Choudhry, Uwe B Sleytr, Bernhard Schuster
This study presents an efficient acoustic and hybrid three-dimensional (3D)-printed electrochemical biosensors for the detection of liver cancer cells. The biosensors function by recognizing the highly expressed tumor marker CD133, which is located on the surface of liver cancer cells. Detection was achieved by recrystallizing a recombinant S-layer fusion protein (rSbpA/ZZ) on the surface of the sensors. The fused ZZ-domain enables immobilization of the anti-CD133 antibody in a defined manner. These highly accessible anti-CD133 antibodies were employed as a sensing layer, thereby enabling the efficient detection of liver cancer cells (HepG2)...
March 21, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28342323/computer-aided-tumor-diagnosis-using-shear-wave-breast-elastography
#9
Woo Kyung Moon, Yao-Sian Huang, Yan-Wei Lee, Shao-Chien Chang, Chung-Ming Lo, Min-Chun Yang, Min Sun Bae, Su Hyun Lee, Jung Min Chang, Chiun-Sheng Huang, Yi-Ting Lin, Ruey-Feng Chang
The shear wave elastography (SWE) uses the acoustic radiation force to measure the stiffness of tissues and is less operator dependent in data acquisition compared to strain elastography. However, the reproducibility of the result is still interpreter dependent. The purpose of this study is to develop a computer-aided diagnosis (CAD) method to differentiate benign from malignant breast tumors using SWE images. After applying the level set method to automatically segment the tumor contour and hue-saturation-value color transformation, SWE features including average tissue elasticity, sectional stiffness ratio, and normalized minimum distance for grouped stiffer pixels are calculated...
March 15, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28340536/comparison-of-broad-vs-narrow-focal-width-lithotripter-fields
#10
Yifei Xing, Tony T Chen, W Neal Simmons, Georgy Sankin, F Hadley Cocks, Michael Eric Lipkin, Glenn M Preminger, Pei Zhong
Objective To investigate the impact of lithotripter focal width on stone fragmentation. Materials and Methods A modified reflector was used to reduce -6 dB beam size of the HM3 lithotripter while increasing concomitantly peak pressure. Fragmentation in vitro was assessed with modified and original reflectors using BegoStone phantoms. A membrane holder was used to mimic lithotripsy in vivo and a matrix holder was used to assess variations of fragmentation power in the focal plane of the lithotripter field. Stone fragmention in vivo produced by the two reflectors was further compared in a swine model...
March 24, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28339777/support-system-for-fine-focusing-and-astigmatism-correction-using-an-auditory-signal-in-scanning-electron-microscopy
#11
Eisaku Oho, Kazuhiko Suzuki, Sadao Yamazaki
The current study describes a new support system for fine focusing and near-perfect astigmatism correction for scanning electron microscopy (SEM). The signal-to-noise ratio of a series of SEM images obtained from fast scan rates (TV scan) was adopted as a new metric for evaluating focus. Measured signal-to-noise ratio values were converted to an acoustic signal (sound wave frequency) using digital image processing techniques, enabling the SEM user to evaluate image focus using the auditory modality. Accurate focusing and correcting astigmatism in general-purpose SEM is traditionally time-consuming and difficult...
February 24, 2017: Microscopy
https://www.readbyqxmd.com/read/28339492/a-preliminary-study-of-skin-ultrasound-in-diffuse-cutaneous-systemic-sclerosis-does-skin-echogenicity-matter
#12
He Liu, Yong Hou, Qing-Li Zhu, Dong Xu, Liang Wang, Jian-Chu Li, Yu-Xin Jiang, Qian Wang, Meng-Tao Li, Feng-Chun Zhang, Xiao-Feng Zeng
OBJECTIVE: To evaluate the usefulness of skin ultrasound and acoustic radiation force impulse (ARFI) quantification in diffuse cutaneous systemic sclerosis (dcSSc). PATIENTS AND METHODS: 28 patients with dcSSc, and 15 age gender matched normal controls were recruited. Skin echogenicity, thickness, and ARFI quantification were measured by ultrasound at 17 sites corresponding to the modified Rodnan skin score (mRSS) in each participant. Compared with controls, skin echogenicity of dcSSc patients was classified into isoechoic, hypoechoic, and hyperechoic...
2017: PloS One
https://www.readbyqxmd.com/read/28339277/turbulence-nonlinearities-shed-light-on-geometric-asymmetry-in-tokamak-confinement-transitions
#13
I Cziegler, A E Hubbard, J W Hughes, J L Terry, G R Tynan
A comprehensive study of fully frequency-resolved nonlinear kinetic energy transfer has been performed for the first time in a diverted tokamak, providing new insight into the parametric dependences of edge turbulence transitions. Measurements using gas puff imaging in the turbulent L-mode state illuminate the source of the long known but as yet unexplained "favorable-unfavorable" geometric asymmetry of the power threshold for transition to the turbulence-suppressed H mode. Results from the recently discovered I mode point to a competition between zonal flow (ZF) and geodesic-acoustic modes (GAM) for turbulent energy, while showing new evidence that the I-to-H transition is still dominated by ZFs...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28339204/liquid-marble-coalescence-and-triggered-microreaction-inspired-by-acoustic-levitation
#14
Zhen Chen, Duyang Zang, Liang Zhao, Mengfei Qu, Xu Li, Xiaoguang Li, Lixin Li, Xingguo Geng
Liquid marbles show promising potential application in the microreactor field. It is of great importance to control the coalescence between two or multiple liquid marbles, however, it is highly difficult to successfully merge two isolated marbles due to their mechanically robust particle shells. In this work, we accomplished the coalescence of multiple liquid marbles via acoustic levitation. The dynamic behaviors of the liquid marbles were monitored by a high-speed camera to find that driven by the sound field, the liquid marbles moved towards each other, collided, and eventually coalesced into a larger single marble...
March 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28339140/acquisition-of-voice-onset-time-in-toddlers-at-high-and-low-risk-for-autism-spectrum-disorder
#15
Karen Chenausky, Helen Tager-Flusberg
Although language delay is common in autism spectrum disorder (ASD), research is equivocal on whether speech development is affected. We used acoustic methods to investigate the existence of sub-perceptual differences in the speech of toddlers who developed ASD. Development of the distinction between b and p was prospectively tracked in 22 toddlers at low risk for ASD (LRC), 22 at high risk for ASD without ASD (HRA-), and 11 at high risk for ASD who were diagnosed with ASD at 36 months (HRA+). Voice onset time (VOT), the main acoustic difference between b and p, was measured from spontaneously produced words at 18, 24, and 36 months...
March 24, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28338805/deciphering-the-genetic-control-of-fruit-texture-in-apple-by-multiple-family-based-analysis-and-genome-wide-association
#16
Mario Di Guardo, Marco C A M Bink, Walter Guerra, Thomas Letschka, Lidia Lozano, Nicola Busatto, Lara Poles, Alice Tadiello, Luca Bianco, Richard G F Visser, Eric van de Weg, Fabrizio Costa
Fruit texture is a complex feature composed of mechanical and acoustic properties relying on the modifications occurring in the cell wall throughout fruit development and ripening. Apple is characterized by a large variation in fruit texture behavior that directly impacts both the consumer's appreciation and post-harvest performance. To decipher the genetic control of fruit texture comprehensively, two complementing quantitative trait locus (QTL) mapping approaches were employed. The first was represented by a pedigree-based analysis (PBA) carried out on six full-sib pedigreed families, while the second was a genome-wide association study (GWAS) performed on a collection of 233 apple accessions...
February 24, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338796/temporal-signatures-of-processing-voiceness-and-emotion-in-sound
#17
Annett Schirmer, Thomas C Gunter
This study explored the temporal course of vocal and emotional sound processing. Participants detected rare repetitions in a stimulus stream comprising neutral and surprised nonverbal exclamations and spectrally rotated control sounds. Spectral rotation preserved some acoustic and emotional properties of the vocal originals. Event-related potentials (ERPs) elicited to unrepeated sounds revealed effects of voiceness and emotion. Relative to nonvocal sounds, vocal sounds elicited a larger centro-parietally distributed N1...
February 17, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28338496/infants-and-adults-use-of-temporal-cues-in-consonant-discrimination
#18
Laurianne Cabrera, Lynne Werner
OBJECTIVES: Adults can use slow temporal envelope cues, or amplitude modulation (AM), to identify speech sounds in quiet. Faster AM cues and the temporal fine structure, or frequency modulation (FM), play a more important role in noise. This study assessed whether fast and slow temporal modulation cues play a similar role in infants' speech perception by comparing the ability of normal-hearing 3-month-olds and adults to use slow temporal envelope cues in discriminating consonants contrasts...
March 23, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28338392/the-effects-of-low-intensity-therapeutic-ultrasound-litus-on-measurable-outcomes-a-critically-appraised-topic
#19
Sarah Daniels, Gabriela Santiago, Jennifer Cuchna, Bonnie Van Lunen
Therapeutic Ultrasound (US) is a popular modality among healthcare professionals and is used to treat a variety of musculoskeletal conditions.(1) Throughout the past 70 years of clinical use,(2) ultrasound has been shown to be an effective way to decrease pain,(2,3) increase tissue temperature,(4) and decrease tissue stiffness of trigger points,(5) amidst other benefits. Treatment parameters with US are typically high-intensity and occur over a short period of time (minutes). The US machine is large and stationary, forcing patients to be non-mobile for the duration of their treatment...
March 24, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28337537/is-prepulse-modification-altered-by-continuous-theta-burst-stimulation-dat1-genotype-and-motor-threshold-interact-on-prepulse-modification-following-brain-stimulation
#20
S Notzon, N Vennewald, A Gajewska, A L Klahn, J Diemer, B Winter, I Fohrbeck, V Arolt, P Pauli, K Domschke, P Zwanzger
Previous studies suggest an inhibitory top-down control of the amygdala by the prefrontal cortex (PFC). Both brain regions play a role in the modulation of prepulse modification (PPM) of the acoustic startle response by a pre-stimulus. Repetitive transcranial magnetic stimulation (rTMS) can modulate the activity of the PFC and might thus affect PPM. This study tested the effect of inhibitory rTMS on PPM accounting for a genetic variant of the dopamine transporter gene (DAT1). Healthy participants (N = 102) were stimulated with continuous theta burst stimulation (cTBS, an intense form of inhibitory rTMS) or sham treatment over the right PFC...
March 24, 2017: European Archives of Psychiatry and Clinical Neuroscience
keyword
keyword
18162
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"