keyword
MENU ▼
Read by QxMD icon Read
search

peck block

keyword
https://www.readbyqxmd.com/read/29116866/functional-changes-through-the-usage-of-3d-printed-transitional-prostheses-in-children
#1
Jorge M Zuniga, Jean L Peck, Rakesh Srivastava, James E Pierce, Drew R Dudley, Nicholas A Than, Nicholas Stergiou
INTRODUCTION: There is limited knowledge on the use of 3 D-printed transitional prostheses, as they relate to changes in function and strength. Therefore, the purpose of this study was to identify functional and strength changes after usage of 3 D-printed transitional prostheses for multiple weeks for children with upper-limb differences. MATERIALS AND METHODS: Gross manual dexterity was assessed using the Box and Block Test and wrist strength was measured using a dynamometer...
November 8, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28951028/mechanical-properties-of-various-heat-treated-nickel-titanium-rotary-instruments
#2
Hye-Jin Goo, Sang Won Kwak, Jung-Hong Ha, Eugenio Pedullà, Hyeon-Cheol Kim
AIM: The purpose of this study was to compare the bending stiffness, cyclic fatigue, and torsional fracture resistances of heat-treated and conventional nickel-titanium rotary instruments. METHODS: V-Taper 2 (VT2; #25/.08), V-Taper 2H (V2H; #25/.06), Hyflex CM (HCM; #25/.06), HyFlex EDM (HDM; #25/variable taper), and ProTaper Next X2 (PTN; #25/variable taper) were tested. The bending stiffness was measured with the customized device (AEndoS), and the files (n = 15) were fixed at 3 mm from the tip and bent at 45° with respect to their long axis...
November 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28938165/a-novel-dopa-albumin-based-tissue-adhesive-for-internal-medical-applications
#3
Wenzhen Zhu, Yvonne Peck, Jabed Iqbal, Dong-An Wang
To date, existing tissue adhesives have various weak points in gluing kinetics and stability - particularly, in biocompatibility, which make most of them remain suboptimal for internal conditions. Herein, a novel mussel-inspired "BCD" tissue glue made of bovine serum albumin (BSA), citrate acid (CA) and dopamine was developed aiming at internal medical applications. BSA was employed as a natural and biocompatible macromolecular backbone; CA was introduced as a dual-functional intermediate to increase reactive carboxyl sites for engraftment of dopamine onto BSA backbone and also block the competing reactive amines from the proteinic backbone...
September 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28747502/permissivity-of-dipeptidyl-peptidase-4-orthologs-to-middle-east-respiratory-syndrome-coronavirus-is-governed-by-glycosylation-and-other-complex-determinants
#4
Kayla M Peck, Trevor Scobey, Jesica Swanstrom, Kara L Jensen, Christina L Burch, Ralph S Baric, Mark T Heise
Middle East respiratory syndrome coronavirus (MERS-CoV) utilizes dipeptidyl peptidase 4 (DPP4) as an entry receptor. While bat, camel, and human DPP4 support MERS-CoV infection, several DPP4 orthologs, including mouse, ferret, hamster, and guinea pig DPP4, do not. Previous work revealed that glycosylation of mouse DPP4 plays a role in blocking MERS-CoV infection. Here, we tested whether glycosylation also acts as a determinant of permissivity for ferret, hamster, and guinea pig DPP4. We found that, while glycosylation plays an important role in these orthologs, additional sequence and structural determinants impact their ability to act as functional receptors for MERS-CoV...
October 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28720286/stress-generation-during-pecking-motion-of-rotary-nickel-titanium-instruments-with-different-pecking-depth
#5
Jung-Hong Ha, Sang Won Kwak, Asgeir Sigurdsson, Seok Woo Chang, Sung Kyo Kim, Hyeon-Cheol Kim
INTRODUCTION: The aim of this study was to evaluate the effect of different pecking depth on the stress generated by the screw-in forces of a rotating endodontic file in simulated canals. METHODS: Twenty simulated resin blocks with a J-shaped curvature were used. Twenty OneG files (MicroMega, Besançon, France) were assigned for a screw-in test depending on the pecking depth in 2 groups (n = 10). The files were operated at 300 rpm, and the up and down speed was controlled at 1 mm/s stroke velocity and a 10-millisecond dwell time using a customized device...
October 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28697050/transfusion-requirement-in-burn-care-evaluation-tribe-a-multicenter-randomized-prospective-trial-of-blood-transfusion-in-major-burn-injury
#6
RANDOMIZED CONTROLLED TRIAL
Tina L Palmieri, James H Holmes, Brett Arnoldo, Michael Peck, Bruce Potenza, Amalia Cochran, Booker T King, William Dominic, Robert Cartotto, Dhaval Bhavsar, Nathan Kemalyan, Edward Tredget, Francois Stapelberg, David Mozingo, Bruce Friedman, David G Greenhalgh, Sandra L Taylor, Brad H Pollock
OBJECTIVE: Our objective was to compare outcomes of a restrictive to a liberal red cell transfusion strategy in 20% or more total body surface area (TBSA) burn patients. We hypothesized that the restrictive group would have less blood stream infection (BSI), organ dysfunction, and mortality. BACKGROUND: Patients with major burns have major (>1 blood volume) transfusion requirements. Studies suggest that a restrictive blood transfusion strategy is equivalent to a liberal strategy...
October 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28454634/vibrations-generated-by-several-nickel-titanium-endodontic-file-systems-during-canal-shaping-in%C3%A2-an-ex%C3%A2-vivo-model
#7
Dong-Min Choi, Jin-Woo Kim, Se-Hee Park, Kyung-Mo Cho, Sang Won Kwak, Hyeon-Cheol Kim
INTRODUCTION: This study aimed to compare the vibration generated by several nickel-titanium (NiTi) file systems and transmitted to teeth under 2 different motions (continuous rotation motion and reciprocating motion). METHODS: Sixty J-shaped resin blocks (Endo Training Bloc-J; Dentsply Maillefer, Ballaigues, Switzerland) were trimmed to a root-shaped form and divided into 2 groups according to the types of electric motors: WaveOne motor (WOM, Dentsply Maillefer) and X-Smart Plus motor (XSM, Dentsply Maillefer)...
April 25, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28256243/mechanical-performance-of-cervical-intervertebral-body-fusion-devices-a-systematic-analysis-of-data-submitted-to-the-food-and-drug-administration
#8
Jonathan H Peck, David C Sing, Srinidhi Nagaraja, Deepa G Peck, Jeffrey C Lotz, Anton E Dmitriev
Cervical intervertebral body fusion devices (IBFDs) are utilized to provide stability while fusion occurs in patients with cervical pathology. For a manufacturer to market a new cervical IBFD in the United States, substantial equivalence to a cervical IBFD previously cleared by FDA must be established through the 510(k) regulatory pathway. Mechanical performance data are typically provided as part of the 510(k) process for IBFDs. We reviewed all Traditional 510(k) submissions for cervical IBFDs deemed substantially equivalent and cleared for marketing from 2007 through 2014...
March 21, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28148737/antenatal-suppression-of-il-1-protects-against-inflammation-induced-fetal-injury-and-improves-neonatal-and-developmental-outcomes-in-mice
#9
Mathieu Nadeau-Vallée, Peck-Yin Chin, Lydia Belarbi, Marie-Ève Brien, Sheetal Pundir, Martin H Berryer, Alexandra Beaudry-Richard, Ankush Madaan, David J Sharkey, Alexis Lupien-Meilleur, Xin Hou, Christiane Quiniou, Alexandre Beaulac, Ines Boufaied, Amarilys Boudreault, Adriana Carbonaro, Ngoc-Duc Doan, Jean-Sebastien Joyal, William D Lubell, David M Olson, Sarah A Robertson, Sylvie Girard, Sylvain Chemtob
Preterm birth (PTB) is commonly accompanied by in utero fetal inflammation, and existing tocolytic drugs do not target fetal inflammatory injury. Of the candidate proinflammatory mediators, IL-1 appears central and is sufficient to trigger fetal loss. Therefore, we elucidated the effects of antenatal IL-1 exposure on postnatal development and investigated two IL-1 receptor antagonists, the competitive inhibitor anakinra (Kineret) and a potent noncompetitive inhibitor 101.10, for efficacy in blocking IL-1 actions...
March 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27847752/screw-in-forces-during-instrumentation-by-various-file-systems
#10
Jung-Hong Ha, Sang Won Kwak, Sung-Kyo Kim, Hyeon-Cheol Kim
OBJECTIVES: The purpose of this study was to compare the maximum screw-in forces generated during the movement of various Nickel-Titanium (NiTi) file systems. MATERIALS AND METHODS: Forty simulated canals in resin blocks were randomly divided into 4 groups for the following instruments: Mtwo size 25/0.07 (MTW, VDW GmbH), Reciproc R25 (RPR, VDW GmbH), ProTaper Universal F2 (PTU, Dentsply Maillefer), and ProTaper Next X2 (PTN, Dentsply Maillefer, n = 10). All the artificial canals were prepared to obtain a standardized lumen by using ProTaper Universal F1...
November 2016: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/27759898/determining-the-optimal-dose-of-adenosine-for-unmasking-dormant-pulmonary-vein-conduction-following-atrial-fibrillation-ablation-electrophysiological-and-hemodynamic-assessment-dormant-af-study
#11
Sandeep Prabhu, Vincent Mackin, Alex J A McLellan, Tuong Phan, Desmond McGlade, Liang-Han Ling, Kah Y Peck, Alexandr Voskoboinik, Bupesh Pathik, Chrishan J Nalliah, Geoff R Wong, Sonia M Azzopardi, Geoffrey Lee, Justin Mariani, Andrew J Taylor, Jonathan M Kalman, Peter M Kistler
INTRODUCTION: ELECTROPHYSIOLOGICAL AND HEMODYNAMIC ASSESSMENT. DORMANT-AF STUDY: The significance of adenosine induced dormant pulmonary vein (PV) conduction in atrial fibrillation (AF) ablation remains controversial. The optimal dose of adenosine to determine dormant PV conduction is yet to be systematically explored. METHODS AND RESULTS: ELECTROPHYSIOLOGICAL AND HEMODYNAMIC ASSESSMENT. DORMANT-AF STUDY: Consecutive patients undergoing index AF ablation received 3 adenosine doses (12, 18, and 24 mg) in a randomized blinded order, immediately after pulmonary vein isolation (PVI)...
January 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27548231/evidence-of-subterranean-termite-feeding-deterrent-produced-by-brown-rot-fungus-fibroporia-radiculosa-peck-parmasto-1968-polyporales-fomitopsidaceae
#12
Nadia Nuraniya Kamaluddin, Akiko Nakagawa-Izumi, Shota Nishizawa, Ayuko Fukunaga, Shuichi Doi, Tsuyoshi Yoshimura, Sakae Horisawa
We found that decayed wood stakes with no termite damage collected from a termite-infested field exhibited a deterrent effect against the termite Reticulitermes speratus, Kolbe, 1885. The effect was observed to be lost or reduced by drying. After identification, it was found that the decayed stakes were infected by brown rot fungus Fibroporia radiculosa (Peck) Parmasto, 1968. In a no-choice feeding test, wood blocks decayed by this fungus under laboratory condition deterred R. speratus feeding and n-hexane extract from the decayed stake and blocks induced termite mortality...
August 18, 2016: Insects
https://www.readbyqxmd.com/read/27376686/polyvinylpyrrolidone-induced-anisotropic-growth-of-gold-nanoprisms-in-plasmon-driven-synthesis
#13
Yueming Zhai, Joseph S DuChene, Yi-Chung Wang, Jingjing Qiu, Aaron C Johnston-Peck, Bo You, Wenxiao Guo, Benedetto DiCiaccio, Kun Qian, Evan W Zhao, Frances Ooi, Dehong Hu, Dong Su, Eric A Stach, Zihua Zhu, Wei David Wei
After more than a decade, it is still unknown whether the plasmon-mediated growth of silver nanostructures can be extended to the synthesis of other noble metals, as the molecular mechanisms governing the growth process remain elusive. Herein, we demonstrate the plasmon-driven synthesis of gold nanoprisms and elucidate the details of the photochemical growth mechanism at the single-nanoparticle level. Our investigation reveals that the surfactant polyvinylpyrrolidone preferentially adsorbs along the nanoprism perimeter and serves as a photochemical relay to direct the anisotropic growth of gold nanoprisms...
August 2016: Nature Materials
https://www.readbyqxmd.com/read/27042297/inhibition-of-fatty-acid-desaturation-is-detrimental-to-cancer-cell-survival-in-metabolically-compromised-environments
#14
Barrie Peck, Zachary T Schug, Qifeng Zhang, Beatrice Dankworth, Dylan T Jones, Elizabeth Smethurst, Rachana Patel, Susan Mason, Ming Jiang, Rebecca Saunders, Michael Howell, Richard Mitter, Bradley Spencer-Dene, Gordon Stamp, Lynn McGarry, Daniel James, Emma Shanks, Eric O Aboagye, Susan E Critchlow, Hing Y Leung, Adrian L Harris, Michael J O Wakelam, Eyal Gottlieb, Almut Schulze
BACKGROUND: Enhanced macromolecule biosynthesis is integral to growth and proliferation of cancer cells. Lipid biosynthesis has been predicted to be an essential process in cancer cells. However, it is unclear which enzymes within this pathway offer the best selectivity for cancer cells and could be suitable therapeutic targets. RESULTS: Using functional genomics, we identified stearoyl-CoA desaturase (SCD), an enzyme that controls synthesis of unsaturated fatty acids, as essential in breast and prostate cancer cells...
2016: Cancer & Metabolism
https://www.readbyqxmd.com/read/27021067/minimally-invasive-implantable-fetal-micropacemaker-mechanical-testing-and-technical-refinements
#15
Li Zhou, Adriana Nicholson Vest, Raymond A Peck, Jonathan P Sredl, Xuechen Huang, Yaniv Bar-Cohen, Michael J Silka, Jay D Pruetz, Ramen H Chmait, Gerald E Loeb
This paper discusses the technical and safety requirements for cardiac pacing of a human fetus with heart failure and hydrops fetalis secondary to complete heart block. Engineering strategies to meet specific technical requirements were integrated into a systematic design and implementation consisting of a novel fetal micropacemaker, a percutaneous implantation system, and a sterile package that enables device storage and recharging maintenance in a clinical setting. We further analyzed observed problems on myocardial fixation and pacing lead fatigue previously reported in earlier preclinical trials...
December 2016: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/25990629/welfare-of-organic-laying-hens-kept-at-different-indoor-stocking-densities-in-a-multi-tier-aviary-system-ii-live-weight-health-measures-and-perching
#16
S Steenfeldt, B L Nielsen
Multi-tier aviary systems, where conveyor belts below the tiers remove the manure at regular intervals, are becoming more common in organic egg production. The area on the tiers can be included in the net area available to the hens (also referred to as usable area) when calculating maximum indoor stocking densities in organic systems within the EU. In this article, results on live weight, health measures and perching are reported for organic laying hens housed in a multi-tier system with permanent access to a veranda and kept at stocking densities (D) of 6, 9 and 12 hens/m2 available floor area, with concomitant increases in the number of hens per trough, drinker, perch and nest space...
September 2015: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/25787824/behavioral-momentum-and-accumulation-of-mass-in-multiple-schedules
#17
Andrew R Craig, Paul J Cunningham, Timothy A Shahan
Behavioral momentum theory suggests that the relation between a discriminative-stimulus situation and reinforcers obtained in that context (i.e., the Pavlovian stimulus-reinforcer relation) governs persistence of operant behavior. Within the theory, a mass-like aspect of behavior has been shown to be a power function of predisruption reinforcement rates. Previous investigations of resistance to change in multiple schedules, however, have been restricted to examining response persistence following protracted periods of stability in reinforcer rates within a discriminative situation...
May 2015: Journal of the Experimental Analysis of Behavior
https://www.readbyqxmd.com/read/25777503/geometric-optimization-for-development-of-glide-path-preparation-nickel-titanium-rotary-instrument
#18
Jung-Hong Ha, Chan-Joo Lee, Sang-Won Kwak, Rashid El Abed, Dongseok Ha, Hyeon-Cheol Kim
INTRODUCTION: This study was done to develop a glide path preparation nickel-titanium rotary instrument by size optimization procedures and evaluate the properties of the prototype. METHODS: G-1 and G-2 files were tested for cyclic fatigue, torsional resistance, and screw-in force. The cyclic fatigue resistance was compared by measuring the number of cycles to failure by using a 90° curved metal canal (n = 10). The torsional resistance was evaluated at 3 levels (2, 4, and 6 mm from the file tip) by measuring the ultimate torsional load (n = 10 each level)...
June 2015: Journal of Endodontics
https://www.readbyqxmd.com/read/25619842/srebp-maintains-lipid-biosynthesis-and-viability-of-cancer-cells-under-lipid-and-oxygen-deprived-conditions-and-defines-a-gene-signature-associated-with-poor-survival-in-glioblastoma-multiforme
#19
C A Lewis, C Brault, B Peck, K Bensaad, B Griffiths, R Mitter, P Chakravarty, P East, B Dankworth, D Alibhai, A L Harris, A Schulze
Oxygen and nutrient limitation are common features of the tumor microenvironment and are associated with cancer progression and induction of metastasis. The inefficient vascularization of tumor tissue also limits the penetration of other serum-derived factors, such as lipids and lipoproteins, which can be rate limiting for cell proliferation and survival. Here we have investigated the effect of hypoxia and serum deprivation on sterol regulatory element-binding protein (SREBP) activity and the expression of lipid metabolism genes in human glioblastoma multiforme (GBM) cancer cells...
October 1, 2015: Oncogene
https://www.readbyqxmd.com/read/25570982/a-percutaneously-implantable-fetal-pacemaker
#20
Li Zhou, Adriana N Vest, Ramen H Chmait, Yaniv Bar-Cohen, Jay Pruetz, Michael Silka, Kaihui Zheng, Ray Peck, Gerald E Loeb
A miniaturized, self-contained pacemaker that could be implanted with a minimally invasive technique would dramatically improve the survival rate for fetuses that develop hydrops fetalis as a result of congenital heart block. We are currently validating a device that we developed to address this bradyarrhythmia. Preclinical studies in a fetal sheep model are underway to demonstrate that the device can be implanted via a minimally invasive approach, can mechanically withstand the harsh bodily environment, can induce effective contractions of the heart muscle with an adequate safety factor, and can successfully operate for the required device lifetime of three months using the previously-developed closed loop transcutaneous recharging system...
2014: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
keyword
keyword
119263
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"