keyword
MENU ▼
Read by QxMD icon Read
search

Masters

keyword
https://www.readbyqxmd.com/read/28231346/in-vitro-three-dimensional-accuracy-of-digital-implant-impressions-the-effect-of-implant-angulation
#1
Vanessa A Chia, Roxanna J Esguerra, Khim Hean Teoh, Juin Wei Teo, Keng Mun Wong, Keson B Tan
PURPOSE: To compare the three-dimensional (3D) accuracy of conventional impressions (CIs) with digital scans (DSs) using an intraoral scanner (IOS) with intraoral scan bodies (SBs) and varying buccolingual interimplant angulations. A secondary aim was to measure the SB machining tolerance and height with and without application of torque. MATERIALS AND METHODS: Three master models (MMs) with two implants simulating an implant-supported three-unit fixed partial denture for bone-level implants were used...
February 23, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28230869/a-combined-high-temperature-experimental-and-theoretical-kinetic-study-of-the-reaction-of-dimethyl-carbonate-with-oh-radicals
#2
Fethi Khaled, Binod Raj Giri, Milán Szőri, Tam V-T Mai, Lam K Huynh, Aamir Farooq
The reaction kinetics of dimethyl carbonate (DMC) and OH radicals were investigated behind reflected shock waves over the temperature range of 872-1295 K and at pressures near 1.5 atm. Reaction progress was monitored by detecting OH radicals at 306.69 nm using a UV laser absorption technique. The rate coefficients for the reaction of DMC with OH radicals were extracted using a detailed kinetic model developed by Glaude et al. (Proc. Combust. Inst. 2005, 30(1), 1111-1118). The experimental rate coefficients can be expressed in Arrhenius form as: kexpt'l = 5...
February 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28230663/mastery-in-bariatric-surgery-the-long-term-surgeon-learning-curve-of-roux-en-y-gastric-bypass
#3
Aristithes G Doumouras, Fady Saleh, Sama Anvari, Scott Gmora, Mehran Anvari, Dennis Hong
OBJECTIVE: To determine the effect of cumulative volume on all-cause morbidity and operative time. BACKGROUND: Gastric bypass is an important public health procedure, but it is difficult to master with little data about how surgeon cumulative volume affects outcomes longitudinally. METHODS: This was a longitudinal study of 29 surgeons during the first 6 years of performing bariatric surgery in a high-volume, regionalized center of excellence system...
February 22, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28229902/impact-of-high-glucose-and-ages-on-cultured-kidney-derived-cells-effects-on-cell-viability-lysosomal-enzymes-and-effectors-of-cell-signaling-pathways
#4
Giovani B Peres, Nestor Schor, Yara M Michelacci
We have previously reported decreased expression and activities of lysosomal cathepsins B and L in diabetic kidney. Relevant morphological changes were observed in proximal tubules, suggesting that these cells are implicated in the early stages of the disease. The aim of the present study was to investigate the mechanisms that lead to these changes. The effects of high glucose (HG) and advanced glycation end products (AGEs) on cell viability, lysosomal enzymes and other effectors of cell signaling of cultured kidney cells were studied...
February 13, 2017: Biochimie
https://www.readbyqxmd.com/read/28229619/measurement-of-hepcidin-isoforms-in-human-serum-by-liquid-chromatography-with-high-resolution-mass-spectrometry
#5
Simon Handley, Lewis Couchman, Paul Sharp, Iain Macdougall, Cajetan Moniz
AIM: Hepcidin-25 is the master regulator of iron homeostasis. N-truncated isoforms of hepcidin-25 have been identified (hepcidin-20, -22, -24), although data on the concentrations of these isoforms are sparse. MATERIALS & METHODS: Serum was mixed with aqueous formic acid, and the supernatant loaded onto a 96-well-SPE-plate. Eluted analytes were analyzed using LC-HR-MS. Forty-seven paired dipotassium-EDTA human plasma and serum samples were analyzed. RESULTS: The LLOQ was 1 μg/l (all analytes)...
February 23, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28229561/children-s-selective-trust-decisions-rational-competence-and-limiting-performance-factors
#6
Jonas Hermes, Tanya Behne, Anna Elisa Bich, Christa Thielert, Hannes Rakoczy
Recent research has amply documented that even preschoolers learn selectively from others, preferring, for example, reliable over unreliable and competent over incompetent models. It remains unclear, however, what the cognitive foundations of such selective learning are, in particular, whether it builds on rational inferences or on less sophisticated processes. The current study, therefore, was designed to test directly the possibility that children are in principle capable of selective learning based on rational inference, yet revert to simpler strategies such as global impression formation under certain circumstances...
February 22, 2017: Developmental Science
https://www.readbyqxmd.com/read/28229109/interaction-between-circadian-rhythms-and-stress
#7
REVIEW
C E Koch, B Leinweber, B C Drengberg, C Blaum, H Oster
Life on earth has adapted to the day-night cycle by evolution of internal, so-called circadian clocks that adjust behavior and physiology to the recurring changes in environmental conditions. In mammals, a master pacemaker located in the suprachiasmatic nucleus (SCN) of the hypothalamus receives environmental light information and synchronizes peripheral tissues and central non-SCN clocks to geophysical time. Regulatory systems such as the hypothalamus-pituitary-adrenal (HPA) axis and the autonomic nervous system (ANS), both being important for the regulation of stress responses, receive strong circadian input...
February 2017: Neurobiology of Stress
https://www.readbyqxmd.com/read/28228264/lsd1-controls-timely-myod-expression-via-myod-core-enhancer-transcription
#8
Isabella Scionti, Shinichiro Hayashi, Sandrine Mouradian, Emmanuelle Girard, Joana Esteves de Lima, Véronique Morel, Thomas Simonet, Maud Wurmser, Pascal Maire, Katia Ancelin, Eric Metzger, Roland Schüle, Evelyne Goillot, Frederic Relaix, Laurent Schaeffer
MyoD is a master regulator of myogenesis. Chromatin modifications required to trigger MyoD expression are still poorly described. Here, we demonstrate that the histone demethylase LSD1/KDM1a is recruited on the MyoD core enhancer upon muscle differentiation. Depletion of Lsd1 in myoblasts precludes the removal of H3K9 methylation and the recruitment of RNA polymerase II on the core enhancer, thereby preventing transcription of the non-coding enhancer RNA required for MyoD expression (CEeRNA). Consistently, Lsd1 conditional inactivation in muscle progenitor cells during embryogenesis prevented transcription of the CEeRNA and delayed MyoD expression...
February 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28228021/waiting-time-distribution-for-electron-transport-in-a-molecular-junction-with-electron-vibration-interaction
#9
Daniel S Kosov
On the elementary level, electronic current consists of individual electron tunnelling events that are separated by random time intervals. The waiting time distribution is a probability to observe the electron transfer in the detector electrode at time t+τ given that an electron was detected in the same electrode at an earlier time t. We study waiting time distribution for quantum transport in a vibrating molecular junction. By treating the electron-vibration interaction exactly and molecule-electrode coupling perturbatively, we obtain the master equation and compute the distribution of waiting times for electron transport...
February 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28227672/robot-assisted-microsurgical-forceps-with-haptic-feedback-for-transoral-laser-microsurgery
#10
Nikhil Deshpande, Manish Chauhan, Claudio Pacchierotti, Domenico Prattichizzo, Darwin G Caldwell, Leonardo S Mattos, Nikhil Deshpande, Manish Chauhan, Claudio Pacchierotti, Domenico Prattichizzo, Darwin G Caldwell, Leonardo S Mattos, Darwin G Caldwell, Leonardo S Mattos, Nikhil Deshpande, Domenico Prattichizzo, Manish Chauhan, Claudio Pacchierotti
In this paper, a novel, motorized, multi-degrees-of-freedom (DoF), microsurgical forceps tool is presented, which is based on a master-slave teleoperation architecture. The slave device is a 7-DoF manipulator with: (i) 6-DoF positioning and orientation, (ii) 1 open/close gripper DoF; and (iii) an integrated force/torque sensor for tissue grip-force measurement. The master device is a 7-DoF haptic interface which teleoperates the slave device, and provides haptic feedback in its gripper interface. The combination of the device and the surgeon interface replaces the manual, hand-held device providing easy-to-use and ergonomic tissue control, simplifying the surgical tasks...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227664/development-of-five-finger-robotic-hand-using-master-slave-control-for-hand-assisted-laparoscopic-surgery
#11
Koki Yoshida, Hiroshi Yamada, Ryu Kato, Tatsuya Seki, Hiroshi Yokoi, Masaya Mukai, Koki Yoshida, Hiroshi Yamada, Ryu Kato, Tatsuya Seki, Hiroshi Yokoi, Masaya Mukai, Hiroshi Yokoi, Masaya Mukai, Tatsuya Seki, Hiroshi Yamada, Koki Yoshida, Ryu Kato
This study aims to develop a robotic hand as a substitute for a surgeon's hand in hand-assisted laparoscopic surgery (HALS). We determined the requirements for the proposed hand from a surgeon's motions in HALS. We identified four basic behaviors: "power grasp," "precision grasp," "open hand for exclusion," and "peace sign for extending peritoneum." The proposed hand had the minimum necessary DOFs for performing these behaviors, five fingers as in a human's hand, a palm that can be folded when a surgeon inserts the hand into the abdomen, and an arm for adjusting the hand's position...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227154/teaching-cardiopulmonary-auscultation-in-workshops-using-a-virtual-patient-simulation-technology-a-pilot-study
#12
D Pereira, P Gomes, S Faria, R Cruz-Correia, M Coimbra, D Pereira, P Gomes, S Faria, R Cruz-Correia, M Coimbra, P Gomes, R Cruz-Correia, S Faria, M Coimbra, D Pereira
Auscultation is currently both a powerful screening tool, providing a cheap and quick initial assessment of a patient's clinical condition, and a hard skill to master. The teaching of auscultation in Universities is today reduced to an unsuitable number of hours. Virtual patient simulators can potentially mitigate this problem, by providing an interesting high-quality alternative to teaching with real patients or patient simulators. In this paper we evaluate the pedagogical impact of using a virtual patient simulation technology in a short workshop format for medical students, training them to detect cardiac pathologies...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226785/mechanisms-of-stochastic-focusing-and-defocusing-in-biological-reaction-networks-insight-from-accurate-chemical-master-equation-acme-solutions
#13
Gamze Giirsoy, Anna Terebus, Youfang Cao, Jie Liang, Gamze Gursoy, Anna Terebus, Youfang Cao, Jie Liang, Gamze Gursoy, Youfang Cao, Anna Terebus, Jie Liang
Stochasticity plays important roles in regulation of biochemical reaction networks when the copy numbers of molecular species are small. Studies based on Stochastic Simulation Algorithm (SSA) has shown that a basic reaction system can display stochastic focusing (SF) by increasing the sensitivity of the network as a result of the signal noise. Although SSA has been widely used to study stochastic networks, it is ineffective in examining rare events and this becomes a significant issue when the tails of probability distributions are relevant as is the case of SF...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226570/a-wearable-signal-acquisition-system-for-physiological-signs-including-throat-ppg
#14
Yizhou Zhong, Yun Pan, Ling Zhang, Kwang-Ting Cheng, Yizhou Zhong, Yun Pan, Ling Zhang, Kwang-Ting Cheng, Yizhou Zhong, Ling Zhang, Kwang-Ting Cheng, Yun Pan
This paper presents a wearable signal acquisition system, which can measure physiological signs, i.e., electrocardiogram (ECG) and photoplethysmogram (PPG). The system is comprised of two parts: (1) an ECG sensor implemented in the master board which will be mounted on the chest and, (2) a combined PPG and motion sensor implemented in the slave board which will be worn around the neck area. The single-lead ECG, the single-channel PPG, and the 3-channel accelerometer signals are all sampled at 200Hz, and transmitted to an Android app through Bluetooth® low energy (BLE) in real time...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225770/a-distal-intergenic-region-controls-pancreatic-endocrine-differentiation-by-acting-as-a-transcriptional-enhancer-and-as-a-polycomb-response-element
#15
Joris van Arensbergen, Sebastien Dussaud, Corinne Pardanaud-Glavieux, Javier García-Hurtado, Claire Sauty, Aline Guerci, Jorge Ferrer, Philippe Ravassard
Lineage-selective expression of developmental genes is dependent on the interplay between activating and repressive mechanisms. Gene activation is dependent on cell-specific transcription factors that recognize transcriptional enhancer sequences. Gene repression often depends on the recruitment of Polycomb group (PcG) proteins, although the sequences that underlie the recruitment of PcG proteins, also known as Polycomb response elements (PREs), remain poorly understood in vertebrates. While distal PREs have been identified in mammals, a role for positive-acting enhancers in PcG-mediated repression has not been described...
2017: PloS One
https://www.readbyqxmd.com/read/28225608/time-dependent-markov-state-models-for-single-molecule-force-spectroscopy
#16
Susmita Ghosh, Abhijit Chatterjee, Swati Bhattacharya
This Letter demonstrates that using time-dependent Markov state models (TD-MSMs) one can obtain molecular-scale insights into force-extension curves for a variety of stretching experiments. A master-MSM constructed at a reference extension using a handful of molecular dynamics calculations forms the basis for generating the required TD-MSM. Changes in the network topology upon stretching is related through a thermodynamic quantity termed the mechanical disposition. Proof-of-principle is provided using a stretched alanine decapeptide under a time-varying pulling force...
February 22, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28225174/mastering-the-photothermal-effect-in-liquid-crystal-networks-a-general-approach-for-self-sustained-mechanical-oscillators
#17
Anne Helene Gelebart, Ghislaine Vantomme, Bert E W Meijer, Dirk J Broer
Chemical networks and molecular switches dominate the area of research geared toward macroscopic motion of materials. A counter-intuitive approach to create self-sustained oscillation by light irradiation of ordinary photostabilizers in splay-aligned liquid-crystalline networks made from commercial mesogens is developed. Photostabilizers or any molecules that are able to quickly dissipate the absorbed light through heat, by vibrational and/or rotational modes, can reach self-oscillating macroscopic motion where self-shadowing plays a critical role...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28224607/a-giant-among-dwarfs-a-new-species-of-galago-primates-galagidae-from-angola
#18
Magdalena S Svensson, Elena Bersacola, Michael S L Mills, Rachel A Munds, Vincent Nijman, Andrew Perkin, Judith C Masters, Sébastien Couette, K Anne-Isola Nekaris, Simon K Bearder
OBJECTIVES: Based on vocalization recordings of an unknown galago species, our main objectives were to compare morphology and call structure with known closely-related taxa and describe a new species of galago. MATERIALS AND METHODS: We conducted field surveys in three forest habitats along the escarpment region in western Angola (Kumbira Forest, Bimbe Area, and Northern Scarp Forest), and examined galago specimens from museums worldwide. We digitized and analyzed calls using Avisoft SASLab Pro software...
February 22, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28224385/evaluation-of-real-time-rt-pcr-assays-for-detection-and-quantification-of-norovirus-genogroups-i-and-ii
#19
Kitwadee Rupprom, Porntip Chavalitshewinkoon-Petmitr, Pornphan Diraphat, Leera Kittigul
Noroviruses are the leading cause of acute gastroenteritis in humans. Real-time reverse transcription-polymerase chain reaction (real-time RT-PCR) is a promising molecular method for the detection of noroviruses. In this study, the performance of three TaqMan real-time RT-PCR assays was assessed, which were one commercially available real-time RT-PCR kit (assay A: Norovirus Real Time RT-PCR kit) and two in-house real-time RT-PCR assays (assay B: LightCycler RNA Master Hybprobe and assay C: RealTime ready RNA Virus Master)...
February 20, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28224211/mechanisms-overseeing-myeloid-derived-suppressor-cell-production-in-neoplastic-disease
#20
REVIEW
Colleen S Netherby, Scott I Abrams
Perturbations in myeloid cell differentiation are common in neoplasia, culminating in immature populations known as myeloid-derived suppressor cells (MDSCs). MDSCs favor tumor progression due to their ability to suppress host immunity or promote invasion and metastasis. They are thought to originate from the bone marrow as a result of exposure to stromal- or circulating tumor-derived factors (TDFs). Although great interest has been placed on understanding how MDSCs function, less is known regarding how MDSCs develop at a transcriptional level...
February 21, 2017: Cancer Immunology, Immunotherapy: CII
keyword
keyword
5317
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"