keyword
MENU ▼
Read by QxMD icon Read
search

coil

keyword
https://www.readbyqxmd.com/read/29677334/monocular-microsaccades-do-they-really-occur
#1
Yu Fang, Christopher Gill, Martina Poletti, Michele Rucci
Small saccades, known as microsaccades, occur frequently during fixation. Several recent studies have argued that a considerable fraction of these movements are present in the traces from one eye only. This claim contrasts with the findings of older reports, which concluded that microsaccades, like larger saccades, are virtually always binocular events. Here we examined the characteristics of small saccades by means of two of the most established high-resolution eye-tracking techniques available. A binocular Dual Purkinje Image eye-tracker was used to record eye movements while observers fixated, with their head immobilized, on markers displayed on a monitor...
March 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29676648/global-tobacco-use-old-and-new-products
#2
Ana Navas-Acien
Tobacco use and exposure to tobacco smoke remain major but avoidable causes of premature mortality and disease worldwide. Although the age-standardized prevalence of daily smoking has declined for both men and women in many countries, the number of smokers continues to increase because of global population growth. Although cigarettes are the most commonly used tobacco product, the tobacco epidemic has become tremendously complex with the emergence and popularity of alternative products such as waterpipes and electronic cigarettes (also known as e-cigarettes)...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29676590/emphysema-management-from-investigational-endobronchial-coils-to-lung-transplantation
#3
Harpreet Singh Grewal, Atul C Mehta
This brief imaging case report highlights a successful bridge to lung transplantation after endobronchial coil assisted lung volume reduction procedure. Our patient was a 64-year-old male with severe emphysema (FEV1:19%, RV: 289%, TLC: 143%), on maximum medical regimen who was enrolled into the Lung Volume Reduction Coil Treatment (RENEW) Study. He underwent bilateral endobronchial coil placement in a two-step procedure, with an immediate improvement in symptoms and pulmonary function testing (FEV1:21%, RV: 254%, TLC: 138%)...
April 20, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29676416/self-plied-and-twist-stable-carbon-nanotube-yarn-artificial-muscles-driven-by-organic-solvent-adsorption
#4
Kaiyun Jin, Silan Zhang, Susheng Zhou, Jian Qiao, Yanhui Song, Jiangtao Di, Dengsong Zhang, Qingwen Li
Artificial yarn/fiber muscles have recently attracted considerable interest for various applications. These muscles can provide large-stroke tensile and torsional actuations, resulting from inserted twists. However, tensional tethering of twisted muscles is generally needed to avoid muscle snarling and untwisting. In this paper a carbon nanotube (CNT) yarn muscle that is tethering-free and twist-stable is reported. The yarn muscle is prepared by allowing the self-plying of a coiled CNT yarn. When driven by acetone adsorption, this muscle shows decoupled actuations, which provide fast and reversible ∼13...
April 20, 2018: Nanoscale
https://www.readbyqxmd.com/read/29676364/qualitative-defects-with-normal-sperm-counts-in-a-patient-attending-infertility-clinic
#5
Rachna Goyal, Mrinalini Kotru, Aarti Gogia, Sonal Sharma
Background: Sperm morphology is an important qualitative parameter in semen analysis. Aim: To assess qualitative defects in the semen with normal sperm counts. Setting and Design: This was a prospective and descriptive study done in a tertiary care center. Materials and Methods: Seventy-five semen samples with normal sperm counts were evaluated. Qualitative defects of sperms on Papanicolaou-stained slides were assessed. The defects were noted as follows: head (tapering head, large head, small head, round head, bifid head), middle piece (bent neck, broad middle piece, excess residual cytoplasm), and tail (coiled tail)...
April 2018: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/29675909/computational-assessment-of-folding-energy-landscapes-in-heterodimeric-coiled-coils
#6
Ingemar André, Sinisa Bjelic
The coiled coil structural motif consists of alpha helices supercoiling around each other to form staggered knobs-into-holes packing. Such structures are deceptively simple, especially as they often can be described with parametric equations, but are known to exist in various conformations. Even the simplest systems, consisting of two monomers, can assemble into a wide range of states. They can form canonical as well as noncanonical coiled coils, be parallel or antiparallel, where helices associate with different degrees of shift, tilt, and rotation...
April 20, 2018: Proteins
https://www.readbyqxmd.com/read/29675882/diffusion-tensor-imaging-using-multiple-coils-for-mouse-brain-connectomics
#7
John C Nouls, Alexandra Badea, Robert B J Anderson, Gary P Cofer, G Allan Johnson
The correlation between brain connectivity and psychiatric or neurological diseases has intensified efforts to develop brain connectivity mapping techniques on mouse models of human disease. The neural architecture of mouse brain specimens can be shown non-destructively and three-dimensionally by diffusion tensor imaging, which enables tractography, the establishment of a connectivity matrix and connectomics. However, experiments on cohorts of animals can be prohibitively long. To improve throughput in a 7-T preclinical scanner, we present a novel two-coil system in which each coil is shielded, placed off-isocenter along the axis of the magnet and connected to a receiver circuit of the scanner...
April 19, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29675589/does-stent-type-impact-coil-embolization-outcomes-in-extended-follow-up-of-small-sized-aneurysms-10-mm
#8
Jeongjun Lee, Young Dae Cho, Dong Hyun Yoo, Hyun-Seung Kang, Won-Sang Cho, Jeong Eun Kim, Jusun Moon, Moon Hee Han
PURPOSE: Self-expandable stents have enabled endovascular treatment of wide-necked aneurysms (ordinarily viewed as technically prohibitive), with favorable outcomes. However, the impact of stent type on occlusive stability has not been adequately investigated. In small-sized unruptured saccular aneurysms, we generated estimates of stent-assisted coil embolization outcomes during follow-up monitoring. Stent type and other risk factors linked to recanalization were analyzed. METHODS: A cohort of 286 patients harboring 312 small-sized unruptured aneurysms (< 10 mm) was subjected to mid-term and extended follow-up monitoring after stent-assisted coiling...
April 20, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29675564/fibrous-matrix-component-of-cell-wall-in-the-giant-celled-green-alga-valonia-utricularis-observed-by-atomic-force-microscopy-in-liquid
#9
Ichiro Mine, Satoko Sekida
The cell walls of the giant-celled green alga Valonia exhibit the "crossed-fibril" arrangement of cellulose microfibrils (CMFs). The existence of fibrous matrix components coiling around the CMFs was recently reported using atomic force microscopy (AFM). To understand the biological role of this fibrous wall component, we attempted to reveal the detailed morphology of the fibrous structure of the cell walls isolated from V. utricularis specimens in artificial seawater (ASW), by using an improved method of AFM...
April 20, 2018: Protoplasma
https://www.readbyqxmd.com/read/29675480/pituitary-dysfunction-from-an-unruptured-ophthalmic-internal-carotid-artery-aneurysm-with-improved-2-year-follow-up-results-a-case-report
#10
Meng Qi, Ming Ye, Meng Li, Peng Zhang
Internal carotid artery (ICA) supraclinoid segment aneurysms extending into the sellar region and leading to pituitary dysfunction are a rare occurrence. To date, long-term follow up of pituitary function 2 years post-treatment has never been reported. Herein, we present a case of pituitary dysfunction due to an unruptured ophthalmic segment internal carotid artery aneurysm and report improved 2-year follow-up results. A 76-year-old male presented with disturbed consciousness due to hyponatremia, which was caused by hypoadrenocorticism resulting from pituitary dysfunction complicated by hypogonadism and hypothyroidism...
2018: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/29673298/initial-clinical-experience-using-the-low-profile-altura-endograft-system-with-double-d-shaped-proximal-stents-for-endovascular-aneurysm-repair
#11
Dainis Krievins, Albrecht Krämer, Janis Savlovskis, Georgij Oszkinis, E Sebastian Debus, Alexander Oberhuber, Christopher K Zarins
PURPOSE: To report the initial clinical results of endovascular aneurysm repair (EVAR) using the low-profile (14-F) Altura Endograft System, which features a double "D-shaped" stent design with suprarenal fixation and modular iliac components that are deployed from distal to proximal. METHODS: From 2011 to 2015, 90 patients (mean age 72.8±8.3 years; 79 men) with abdominal aortic aneurysm (AAA; mean diameter 53.8±5.7 mm) were treated at 10 clinical sites in 2 prospective, controlled clinical studies using the Altura endograft...
April 1, 2018: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/29672916/magic-angle-spinning-nmr-with-metallized-rotors-as-cylindrical-microwave-resonators
#12
Faith J Scott, Erika L Sesti, Eric J Choi, Alexander J Laut, Jagadishwar R Sirigiri, Alexander B Barnes
We introduce a novel design for millimeter wave electromagnetic structures within magic angle spinning (MAS) rotors. In this demonstration, a copper coating is vacuum deposited onto the outside surface of a sapphire rotor at a thickness of 50 nanometers. This thickness is sufficient to reflect 197 GHz microwaves, yet not too thick as to interfere with radiofrequency fields at 300 MHz or prevent sample spinning due to eddy currents. Electromagnetic simulations of an idealized rotor geometry show a microwave quality factor of 148...
April 19, 2018: Magnetic Resonance in Chemistry: MRC
https://www.readbyqxmd.com/read/29672571/measurement-of-heating-coil-temperature-for-e-cigarettes-with-a-top-coil-clearomizer
#13
Wenhao Chen, Ping Wang, Kazuhide Ito, Jeff Fowles, Dennis Shusterman, Peter A Jaques, Kazukiyo Kumagai
OBJECTIVES: To determine the effect of applied power settings, coil wetness conditions, and e-liquid compositions on the coil heating temperature for e-cigarettes with a "top-coil" clearomizer, and to make associations of coil conditions with emission of toxic carbonyl compounds by combining results herein with the literature. METHODS: The coil temperature of a second generation e-cigarette was measured at various applied power levels, coil conditions, and e-liquid compositions, including (1) measurements by thermocouple at three e-liquid fill levels (dry, wet-through-wick, and full-wet), three coil resistances (low, standard, and high), and four voltage settings (3-6 V) for multiple coils using propylene glycol (PG) as a test liquid; (2) measurements by thermocouple at additional degrees of coil wetness for a high resistance coil using PG; and (3) measurements by both thermocouple and infrared (IR) camera for high resistance coils using PG alone and a 1:1 (wt/wt) mixture of PG and glycerol (PG/GL)...
2018: PloS One
https://www.readbyqxmd.com/read/29671936/influence-of-human-parathyroid-hormone-during-orthodontic-tooth-movement-and-relapse-in-the-osteoporotic-rat-model-a-preliminary-study
#14
H S Lee, H A Heo, S H Park, W Lee, S W Pyo
OBJECTIVE: To investigate the effects of parathyroid hormone (PTH) on tooth movement in ovariectomized (OVX) rats by comparing the tooth movement distance and relapse and by examining the alveolar bone microstructure. MATERIALS AND METHODS: Thirty 8-week-old female rats were classified into 3 groups: sham-operated, OVX and ovariectomized rats injected with PTH (PTH). Eight weeks later, a closed-coil spring appliance was placed between the maxillary incisor and the first molar and then activated with 50 cN of force...
April 19, 2018: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/29671058/transcatheter-arterial-embolization-for-bleeding-peptic-ulcers-a-multicenter-study
#15
Stavros Spiliopoulos, Riccardo Inchingolo, Pierleone Lucatelli, Roberto Iezzi, Athanasios Diamantopoulos, Alessandro Posa, Bryan Barry, Carmelo Ricci, Marco Cini, Chrysostomos Konstantos, Konstantinos Palialexis, Lazaros Reppas, Artemis Trikola, Michele Nardella, Andreas Adam, Elias Brountzos
PURPOSE: To investigate the outcomes of transcatheter arterial embolization (TAE) for the treatment of peptic ulcer bleeding (PUB). MATERIALS AND METHODS: This is a retrospective, multicenter study, which investigated all patients who underwent TAE for the treatment of severe upper gastrointestinal hemorrhage from peptic ulcers in five European centers, between January 1, 2012 and May 1, 2017. All patients had undergone failed endoscopic hemostasis. Forty-four patients (male; mean age 74...
April 18, 2018: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29670739/endovascular-treatment-of-an-intraosseous-arteriovenous-malformation-of-the-mandible-in-a-child-a-case-report
#16
Paolo Cariati, Ana-Belén Marín-Fernández, Miguel-Ángel Julia-Martínez, Miguel Pérez-de Perceval-Tara, Darío Sánchez-López, Ildefonso Martínez-Lara
The modern application of interventional radiology techniques is revolutionizing the treatment of the vascular malformations of the head and neck. In fact, the morbidity related with the surgical extirpation of the malformation might be drastically reduced with the use of an endovascular approach. The present report describes the case of a 11 years old male affected by a large intraosseous arteriovenous malformation of the mandible. The coil embolization of the main drainage vein caused the spontaneous regression of the lesion and avoided a mutilating surgery and severe psychological sequels...
February 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29670428/a-new-genus-of-minute-sparianthinae-spiders-from-the-caribbean-araneae-sparassidae
#17
Cristina Anne Rheims, Giraldo Alayón
The monotypic genus Diminutella gen. n. is proposed to include the type species, Diminutella cortina sp. n. , described from San Diego de los Baños, based on male and female specimens. This species is amongst the smallest Sparianthinae known to date reaching only 4.4 mm body length. It can be distinguished from other Sparianthinae by the combination of eye arrangement, with anterior eye row recurved, posterior eye row straight, spination pattern of legs I-II, with three ventral pairs on tibiae and one on metatarsi, and by the peculiar genitalia, with male palps bearing a large, laminar, layered conductor that rests within a retrolateral depression in the cymbium, and a female vulva with long copulatory ducts coiled around the stalk of a globose blind ending appendage...
2018: ZooKeys
https://www.readbyqxmd.com/read/29670177/proton-decoupled-carbon-magnetic-resonance-spectroscopy-in-human-calf-muscles-at-7-t-using-a-multi-channel-radiofrequency-coil
#18
Sigrun Goluch, Roberta Frass-Kriegl, Martin Meyerspeer, Michael Pichler, Jürgen Sieg, Martin Gajdošík, Martin Krššák, Elmar Laistler
13 C magnetic resonance spectroscopy is a viable, non-invasive method to study cell metabolism in skeletal muscles. However, MR sensitivity of 13 C is inherently low, which can be overcome by applying a higher static magnetic field strength together with radiofrequency coil arrays instead of single loop coils or large volume coils, and 1 H decoupling, which leads to a simplified spectral pattern. 1 H-decoupled 13 C-MRS requires RF coils which support both, 1 H and 13 C, Larmor frequencies with sufficient electromagnetic isolation between the pathways of the two frequencies...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29670021/study-on-misalignment-angle-compensation-during-scale-factor-matching-for-two-pairs-of-accelerometers-in-a-gravity-gradient-instrument
#19
Xiangqing Huang, Zhongguang Deng, Yafei Xie, Ji Fan, Chenyuan Hu, Liangcheng Tu
A method for automatic compensation of misalignment angles during matching the scale factors of two pairs of the accelerometers in developing the rotating accelerometer gravity gradient instrument (GGI) is proposed and demonstrated in this paper. The purpose of automatic scale factor matching of the four accelerometers in GGI is to suppress the common mode acceleration of the moving-based platforms. However, taking the full model equation of the accelerometer into consideration, the other two orthogonal axes which is the pendulous axis and the output axis, will also sense the common mode acceleration and reduce the suppression performance...
April 18, 2018: Sensors
https://www.readbyqxmd.com/read/29667190/age-related-changes-in-late-i-waves-influence-motor-cortex-plasticity-induction-in-older-adults
#20
George M Opie, John Cirillo, John G Semmler
KEYPOINTS SUMMARY: The response to neuroplasticity interventions using transcranial magnetic stimulation (TMS) is reduced in older adults, which may be due, in part, to age-related alterations in interneuronal (I-wave) circuitry. The current study investigated age-related changes in interneuronal characteristics and whether they influence motor cortical plasticity in older adults. While I-wave recruitment was unaffected by age, there was a shift in the temporal characteristics of the late, but not early I-waves...
April 18, 2018: Journal of Physiology
keyword
keyword
4113
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"