keyword
MENU ▼
Read by QxMD icon Read
search

Minimal pairs

keyword
https://www.readbyqxmd.com/read/27910916/measuring-the-coefficient-of-friction-of-a-small-floating-liquid-marble
#1
Chin Hong Ooi, Anh Van Nguyen, Geoffrey M Evans, Dzung Viet Dao, Nam-Trung Nguyen
This paper investigates the friction coefficient of a moving liquid marble, a small liquid droplet coated with hydrophobic powder and floating on another liquid surface. A floating marble can easily move across water surface due to the low friction, allowing for the transport of aqueous solutions with minimal energy input. However, the motion of a floating marble has yet to be systematically characterised due to the lack of insight into key parameters such as the coefficient of friction between the floating marble and the carrier liquid...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910375/high-precision-measurement-of-magnetic-penetration-depth-in-superconducting-films
#2
X He, A Gozar, R Sundling, I Božović
The magnetic penetration depth (λ) in thin superconducting films is usually measured by the mutual inductance technique. The accuracy of this method has been limited by uncertainties in the geometry of the solenoids and in the film position and thickness, by parasitic coupling between the coils, etc. Here, we present several improvements in the apparatus and the method. To ensure the precise thickness of the superconducting layer, we engineer the films at atomic level using atomic-layer-by-layer molecular beam epitaxy...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27908637/response-of-three-cyprinid-fish-species-to-the-scavenger-deterrent-factor-produced-by-the-mutualistic-bacteria-associated-with-entomopathogenic-nematodes
#3
Ramalingam Karthik Raja, Dilipkumar Aiswarya, Baris Gulcu, Manickam Raja, Pachiappan Perumal, Sivaperumal Sivaramakrishnan, Harry K Kaya, Selcuk Hazir
The symbiotic bacteria, Photorhabdus and Xenorhabdus associated with entomopathogenic nematodes (EPNs) in the genera Heterorhabditis and Steinernema, respectively, produce a compound(s) called the Scavenging Deterrent Factor (SDF). SDF deters a number of terrestrial insect scavengers and predators and one bird species from feeding on host insects killed by the nematode-bacterium complex but has not been tested against aquatic vertebrates. Moreover, the Heterorhabditis-Photorhabdus association is believed to have evolved in an aquatic environment...
November 28, 2016: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/27908179/an-evaluation-of-spatial-resolution-of-a-prototype-proton-ct-scanner
#4
Tia E Plautz, V Bashkirov, V Giacometti, R F Hurley, R P Johnson, P Piersimoni, H F-W Sadrozinski, R W Schulte, A Zatserklyaniy
PURPOSE: To evaluate the spatial resolution of proton CT using both a prototype proton CT scanner and Monte Carlo simulations. METHODS: A custom cylindrical edge phantom containing twelve tissue-equivalent inserts with four different compositions at varying radial displacements from the axis of rotation was developed for measuring the modulation transfer function (MTF) of a prototype proton CT scanner. Two scans of the phantom, centered on the axis of rotation, were obtained with a 200 MeV, low-intensity proton beam: one scan with steps of 4°, and one scan with the phantom continuously rotating...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27908126/communication-multipole-approximations-of-distant-pair-energies-in-local-correlation-methods-with-pair-natural-orbitals
#5
Hans-Joachim Werner
The accuracy of multipole approximations for distant pair energies in local second-order Møller-Plesset perturbation theory (LMP2) as introduced by Hetzer et al. [Chem. Phys. Lett. 290, 143 (1998)] is investigated for three chemical reactions involving molecules with up to 92 atoms. Various iterative and non-iterative approaches are compared, using different energy thresholds for distant pair selection. It is demonstrated that the simple non-iterative dipole-dipole approximation, which has been used in several recent pair natural orbitals (PNO)-LMP2 and PNO-LCCSD (local coupled-cluster with singles and doubles) methods, may underestimate the distant pair energies by up to 50% and can lead to significant errors in relative energies, unless very tight thresholds are used...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27905646/-responsiveness-of-the-chilean-version-of-the-international-consultation-on-incontinence-questionnaire-short-form-iciq-sf
#6
Maritza Busquets, Cinthya Urquidi, Emiliano Pertossi
BACKGROUND: A symptom questionnaire must be able to detect minimal changes after treatment to be clinically useful. AIM: To evaluate the responsiveness of the Spanish-Chilean version of the ICIQ-SF questionnaire after medical and surgical procedures for the treatment of urinary incontinence (UI) in women consulting at a public Chilean Hospital. MATERIAL AND METHODS: Data of 124 women aged 59 ± 10 years who were treated for UI and in whom ICIQ-SF questionnaire was applied in two opportunities (before and after medical or surgical treatment), was analyzed...
August 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/27897128/defining-the-limits-of-endoscopic-access-to-internal-auditory-canal
#7
Adam Master, Mickie Hamiter, Maura Cosetti
OBJECTIVE: To quantify surgical access to the internal auditory canal (IAC) using an exclusively endoscopic transcanal approach (EETA) and investigate surgically relevant relationships with neurovascular and osseous landmarks of the temporal bone. MATERIALS AND METHODS: Anatomical dissection of two paired temporal bones and 15 unpaired temporal bones was performed using an exclusively endoscopic approach to IAC. The dissection proceeded until the cerebellopontine angle (CPA) could be accessed...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27896766/multiplex-immunoassay-profiling
#8
Laurie Stephen
Multiplex immunoassays allow for the rapid profiling of biomarker proteins in biological fluids, using less sample and labor than single immunoassays. This chapter details the methods to develop and manufacture multiplex assays for the Luminex(®) platform. Although assay development is not included here, the same methods can be used to covalently couple antibodies to the Luminex beads and to label antibodies for the screening of sandwich pairs, if needed. The assay optimization, detection of cross-reactivity, and minimizing antibody interactions and matrix interferences will be addressed...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27896679/what-are-the-biomechanical-properties-of-the-taylor-spatial-frame%C3%A2
#9
Daniel J Henderson, Jeremy L Rushbrook, Paul J Harwood, Todd D Stewart
BACKGROUND: The Taylor Spatial Frame™ (TSF) is a versatile variant of the traditional Ilizarov circular fixator. Although in widespread use, little comparative data exist to quantify the biomechanical effect of substituting the tried-and-tested Ilizarov construct for the TSF hexapod system. QUESTIONS/PURPOSES: This study was designed to investigate the mechanical properties of the TSF system under physiologic loads, with and without the addition of a simulated bone model, with comparison to the standard Ilizarov frame...
November 28, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27896623/effect-of-the-new-maternity-insurance-scheme-on-medical-expenditures-for-caesarean-delivery-in-wuxi-china-a-retrospective-pre-post-reform-case-study
#10
Chun Chen, Zhihong Cheng, Ping Jiang, Mei Sun, Qi Zhang, Jun Lv
Aiming to control rising medical expenditures and help improve China's healthcare systems, this study examined whether a cap-based medical insurance scheme with shared financial interest between the insurance and healthcare providers is effective in containing hospitals' C-section medical expenditures. We used 6547 caesarean delivery case records from a teaching tertiary-level general public hospital located in Wuxi, China (2004-2013), and used the Chow test to investigate the possibility of significant variation in mean medical expenditures for caesarean deliveries pre- and post-reform...
November 28, 2016: Frontiers of Medicine
https://www.readbyqxmd.com/read/27896190/the-use-of-locally-applied-vibration-to-minimize-pain-during-fractional-co2-laser-therapy-in-living-liver-donor-scar-management
#11
Sinyoung Song, Dong Hoon Choi, Tae Suk Oh
BACKGROUND: Fractional CO2 laser is an effective treatment for scars, but most patients complain about sharp burning pain, even after the application of lidocaine ointment. This study analyzed the impact of a vibrating device to nonpharmacologically reduce the acute pain of laser treatment, in accordance with the gate control theory of pain management. METHODS: This is a prospective study performed from May 2013 through March 2014. Fifty-three patients (mean age, 26...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27894310/monitoring-change-in-volume-of-calcifications-in-juvenile-idiopathic-inflammatory-myopathy-a-pilot-study-using-low-dose-computed-tomography
#12
Maria Ibarra, Cynthia Rigsby, Gabrielle A Morgan, Christina L Sammet, Chiang-Ching Huang, Dong Xu, Ira N Targoff, Lauren M Pachman
BACKGROUND: Dystrophic calcifications may occur in patients with J uvenile Idiopathic Inflammatory Myopathy (JIIM) as well as other connective tissue and metabolic diseases, but a reliable method of measuring the volume of these calcifications has not been established. The purpose of this study is to determine the feasibility of low dose, limited slice, Computed Tomography (CT) to measure objectively in-situ calcification volumes in patients with JIIM over time. METHODS: Ten JIIM patients (eight JDM, two Overlap) with calcifications were prospectively recruited over a 2-year period to undergo two limited, low dose, four-slice CT scans...
November 29, 2016: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/27891469/comparison-of-anchorage-pattern-under-two-types-of-orthodontic-mini-implant-loading-during-retraction-in-type-a-anchorage-cases
#13
B Imran Khan, Gowri Sankar Singaraju, Prasad Mandava, G Vivek Reddy, Venkatesh Nettam, Venkat Naidu Bhavikati
INTRODUCTION: The orthodontic mini-screws are the mainstay of direct skeletal anchorage which requires minimal compliance and provides maximal anchorage control. However, the timing of initiation of orthodontic loading of these mini-screws is not clearly established in the available studies. AIM: The purpose of this study was to determine the reciprocal effects on mini-screw implant with immediate loading in comparison to that of delayed loading during retraction...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890475/slowed-dark-adaptation-in-older-eyes-effect-of-location
#14
Humza J Tahir, Elena Rodrigo-Diaz, Neil R A Parry, Jeremiah M F Kelly, D Carden, Ian J Murray
PURPOSE: The rate of rod sensitivity recovery following a photobleach is a basic measure of the integrity of the outer retina. Rods are selectively impaired in aging and many disorders of the retina, notably Age-Related Macular Degeneration (AMD). It is not known for certain whether the age-related deficit is a pan-retinal effect or if there are localised regions of impaired rod function. To address this important issue a dual arc stimulus was developed that samples sensitivity recovery in two retinal locations...
November 24, 2016: Experimental Eye Research
https://www.readbyqxmd.com/read/27887873/a-rapid-method-for-detecting-propionibacterium-acnes-in-surgical-biopsy-specimens-from-the-shoulder
#15
Scott Holmes, Ana M Pena Diaz, George S Athwal, Kenneth J Faber, David B O'Gorman
BACKGROUND: Propionibacterium (P) acnes infection of the shoulder after arthroplasty is a common and serious complication. Current detection methods for P acnes involve anaerobic cultures that require prolonged incubation periods (typically 7-14 days). We have developed a polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) approach that sensitively and specifically identifies P acnes in tissue specimens within a 24-hour period. METHODS: Primers were designed to amplify a unique region of the 16S rRNA gene in P acnes that contained a unique HaeIII restriction enzyme site...
November 22, 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27884202/extending-colonic-mucosal-microbiome-analysis-assessment-of-colonic-lavage-as-a-proxy-for-endoscopic-colonic-biopsies
#16
Euan Watt, Matthew R Gemmell, Susan Berry, Mark Glaire, Freda Farquharson, Petra Louis, Graeme I Murray, Emad El-Omar, Georgina L Hold
BACKGROUND: Sequencing-based analysis has become a well-established approach to deciphering the composition of the gut microbiota. However, due to the complexity of accessing sufficient material from colonoscopic biopsy samples, most studies have focused on faecal microbiota analysis, even though it is recognised that differences exist between the microbial composition of colonic biopsies and faecal samples. We determined the suitability of colonic lavage samples to see if it had comparable microbial diversity composition to colonic biopsies as they are without the limitations associated with sample size...
November 25, 2016: Microbiome
https://www.readbyqxmd.com/read/27884105/structural-features-of-dna-that-determine-rna-polymerase-ii-core-promoter
#17
Irina A Il'icheva, Mingian V Khodikov, Maria S Poptsova, Dmitry Yu Nechipurenko, Yury D Nechipurenko, Sergei L Grokhovsky
BACKGROUND: The general structure and action of all eukaryotic and archaeal RNA polymerases machinery have an astonishing similarity despite the diversity of core promoter sequences in different species. The goal of our work is to find common characteristics of DNA region that define it as a promoter for the RNA polymerase II (Pol II). RESULTS: The profiles of a large number of physical and structural characteristics, averaged over representative sets of the Pol II minimal core promoters of the evolutionary divergent species from animals, plants and unicellular fungi were analysed...
November 25, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27882558/effects-of-voice-sparing-cricotracheal-resection-on-phonation-in-women
#18
Kristine Tanner, Christopher Dromey, Mark L Berardi, Lisa M Mattei, Jenny L Pierce, Jonathan J Wisco, Eric J Hunter, Marshall E Smith
INTRODUCTION: Individuals with idiopathic subglottic stenosis (SGS) are at risk for voice disorders prior to and following surgical management. This study examined the nature and severity of voice disorders in patients with SGS before and after a revised cricotracheal resection (CTR) procedure designed to minimize adverse effects on voice function. METHOD: Eleven women with idiopathic SGS provided presurgical and postsurgical audio recordings. Voice Handicap Index (VHI) scores were also collected...
November 24, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27878626/reducing-fluoroscopic-radiation-exposure-during-endomyocardial-biopsy-in-pediatric-transplant-recipients
#19
Jeffrey G Gossett, Christina L Sammet, Anya Agrawal, Karen Rychlik, David F Wax
Endomyocardial biopsy (EMB) with fluoroscopy is used for rejection surveillance in pediatric heart transplantation. Lowering frame rate may reduce radiation, but decreases temporal resolution and image quality. We undertook a quality initiative reducing frame rate from 10 frames per second (FPS) to 5 FPS. To assess whether lowering frame rate can reduce radiation exposure without compromising safety, data on EMBs from 9/2009 to 4/2013 without angiography or intervention were reviewed. Effective dose was calculated from dose area product (DAP) and fluoroscopy time...
November 23, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27875323/estimating-intrinsic-and-extrinsic-noise-from-single-cell-gene-expression-measurements
#20
Audrey Qiuyan Fu, Lior Pachter
Gene expression is stochastic and displays variation ("noise") both within and between cells. Intracellular (intrinsic) variance can be distinguished from extracellular (extrinsic) variance by applying the law of total variance to data from two-reporter assays that probe expression of identically regulated gene pairs in single cells. We examine established formulas [Elowitz, M. B., A. J. Levine, E. D. Siggia and P. S. Swain (2002): "Stochastic gene expression in a single cell," Science, 297, 1183-1186.] for the estimation of intrinsic and extrinsic noise and provide interpretations of them in terms of a hierarchical model...
December 1, 2016: Statistical Applications in Genetics and Molecular Biology
keyword
keyword
74687
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"