keyword
MENU ▼
Read by QxMD icon Read
search

coil

keyword
https://www.readbyqxmd.com/read/29454055/optimization-chain-conformation-and-characterization-of-exopolysaccharide-isolated-from-leuconostoc-mesenteroides-drp105
#1
Hanwen Xing, Renpeng Du, Fangkun Zhao, Ye Han, Huazhi Xiao, Zhijiang Zhou
Response surface methodology (RSM) was used to optimize the fermentation condition of exopolysaccharide (EPS) producing strain Leuconostoc mesenteroides DRP105. Result showed that the optimum condition was sucrose 86.83 g/L, tryptone 15.47 g/L, initial pH 7.18 and maximum yield was 53.79 ± 0.78 g/L in 36 h fermentation. Chain conformation was characterized by Congo red test, β-elimination and circular dichroism (CD), which indicated that the EPS was O-linkage and exhibited random coil structure in aqueous solution...
February 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29453904/synthesis-self-assembly-and-photoresponsive-liquid-crystals-based-on-azobenzene-derivatives
#2
Hongyan Wang, Yi Han, Wei Yuan, Mengjiao Wu, Yulan Chen
A new class of rod-coil-rod molecules with an azobenzene core were synthesized. They were found to form robust organogels in several kinds of organic solvents. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), FT-IR spectroscopy, UV-vis absorption spectroscopy, 1H NMR, and X-ray diffraction (XRD) revealed that in these organogels, the molecules self-assembled into nanofiber network with an H-type aggregation mode under the joint effect of Pi-Pi stacking, intermolecular hydrogen bonding, and van der Waals forces...
February 17, 2018: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/29453516/the-coiled-spring-sign-of-appendiceal-intussusception
#3
REVIEW
Sergey Leshchinskiy, Robert D'Agostino
No abstract text is available yet for this article.
February 16, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29453324/incidence-and-predictors-of-perioperative-complications-with-transvenous-lead-extractions-real-world-experience-with-national-cardiovascular-data-registry
#4
Nitesh Sood, David T Martin, Rachel Lampert, Jeptha P Curtis, Craig Parzynski, Jude Clancy
BACKGROUND: Transvenous lead extraction is an integral part of management of patients with cardiovascular implantable electronic devices. Real-world incidence and predictors of perioperative complications in extractions involving implantable cardioverter-defibrillator leads have not been described in detail. METHODS AND RESULTS: Data from the National Cardiovascular Data Registry Implantable Cardioverter-Defibrillator Registry were analyzed. Lead extraction was defined as removal of leads implanted for >1 year...
February 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29453214/renal-nutcracker-syndrome-in-a-young-lady-unusual-findings-and-endovascular-management
#5
Manish Taneja, Benjamin Soo Yeng Chua, Kanika Daga
Nutcracker syndrome (NCS) is caused by compression of left renal vein (LRV), usually between the aorta and the superior mesenteric artery (SMA). This can lead to obstruction of flow into the inferior vena cava and secondary left renal venous hypertension. Despite potential serious consequences, diagnosing NCS is often challenging, circuitous and commonly delayed. We report an extremely unique case of NCS. A 34-year-old woman presented with left flank pain and discomfort. On investigation, it was found that high pressure in the LRV, due to compression by the SMA, had led to a large venous aneurysm that had caused pelviureteric junction obstruction and hydronephrosis...
February 16, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29451801/patterns-of-carbon-nanotubes-by-flow-directed-deposition-on-substrates-with-architectured-topographies
#6
Mohammad Khalid Jawed, Nicolas G Hadjiconstantinou, David Parks, Pedro M Reis
We develop and perform continuum mechanics simulations of carbon nanotube (CNT) deployment directed by a combination of surface topography and rarefied gas flow. We employ the Discrete Elastic Rods method to model the deposition of CNT as a slender elastic rod that evolves in time under two external forces, namely van der Waals (vdW) and aerodynamic drag. Our results confirm that this self-assembly process is analogous to a previously studied macroscopic system, the `elastic sewing machine', where an elastic rod deployed onto a moving substrate forms nonlinear patterns...
February 16, 2018: Nano Letters
https://www.readbyqxmd.com/read/29450110/quantitative-analyses-of-the-equilibria-among-dna-complexes-of-a-blue-light-regulated-bzip-module-photozipper
#7
Yoichi Nakatani, Osamu Hisatomi
Aureochrome1 is a blue-light-receptor protein identified in a stramenopile alga, Vaucheria frigida . Photozipper (PZ) is an N-terminally truncated, monomeric, V. frigida aureochrome1 fragment containing a basic leucine zipper (bZIP) domain and a light-oxygen-voltage (LOV)-sensing domain. PZ dimerizes upon photoexcitation and consequently increases its affinity for the target sequence. In the present study, to understand the equilibria among DNA complexes of PZ, DNA binding by PZ and mutational variants was quantitatively investigated by electrophoretic-mobility-shift assay and fluorescence-correlation spectroscopy in the dark and light states...
2018: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/29449282/a-patient-dose-reduction-technique-for-neuroendovascular-image-guided-interventions-image-quality-comparison-study
#8
A Sonig, S V Setlur Nagesh, V S Fennell, S Gandhi, L Rangel-Castilla, C N Ionita, K V Snyder, L N Hopkins, D R Bednarek, S Rudin, A H Siddiqui, E I Levy
BACKGROUND AND PURPOSE: The ROI-dose-reduced intervention technique represents an extension of ROI fluoroscopy combining x-ray entrance skin dose reduction with spatially different recursive temporal filtering to reduce excessive image noise in the dose-reduced periphery in real-time. The aim of our study was to compare the image quality of simulated neurointerventions with regular and reduced radiation doses using a standard flat panel detector system. MATERIALS AND METHODS: Ten 3D-printed intracranial aneurysm models were generated on the basis of a single patient vasculature derived from intracranial DSA and CTA...
February 15, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29448967/facial-nerve-stimulation-in-normal-pigs-and-healthy-human-volunteers-transitional-development-of-a-medical-device-for-the-emergency-treatment-of-ischemic-stroke
#9
Olivia Sanchez, Andrea García, Fernando Castro-Prado, Miriam Perez, Rafael Lara-Estrada, Martin Ramirez-Meza, Montserrat Godinez, Michael L Coco, Joaquín Azpiroz, Mark K Borsody, Emilio Sacristán
BACKGROUND: Magnetic stimulation of the facial nerve has been tested in preclinical studies as a new, non-invasive emergency treatment of ischemic stroke that acts by increasing cerebral blood flow (CBF). The objective of the studies reported herein was to identify minimal stimulation parameters that increase CBF in large animals and then test those stimulation parameters in healthy volunteers for safety, tolerability, and effectiveness at increasing CBF. This translational research is necessary preparation for clinical studies in ischemic stroke patients...
February 15, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29448867/comparison-of-the-knitted-silk-vascular-grafts-coated-with-fibroin-sponges-prepared-using-glycerin-poly-ethylene-glycol-diglycidyl-ether-and-poly-ethylene-glycol-as-porogens
#10
Takashi Tanaka, Akiko Uemura, Ryo Tanaka, Yugo Tasei, Tetsuo Asakura
Development of a small-diameter artificial vascular graft is urgent because existing materials often occlude within a short time. We have shown that small-diameter vascular graft using Bombyx mori silk fibroin is a potential candidate. Silk fibroin grafts are fabricated by coating silk fibroin on the knit tube prepared from silk fibroin fibers. However, there is a serious problem that the coated silk fibroin portion hardens when alcohol is used for insolubilization of the coated silk fibroin. This hardening prevents the desired biodegradation of the coated silk fibroin...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29447426/a-coiled-coil-protein-is-required-for-coordination-of-karyokinesis-and-cytokinesis-in-toxoplasma-gondii
#11
Flavie Courjol, Mathieu Gissot
Toxoplasma gondii is a unicellular eukaryotic pathogen that belongs to the Apicomplexa phylum, which encompasses some of the deadliest pathogens of medical and veterinary importance. The centrosome is key to the organization and coordination of the cell cycle and division of apicomplexan parasites. The T. gondii centrosome possesses a particular bipartite structure (outer and inner core). One of the main roles of the centrosome is to ensure proper coordination of karyokinesis. However, how these two events are coordinated is still unknown in T...
February 15, 2018: Cellular Microbiology
https://www.readbyqxmd.com/read/29446945/a-statistical-model-to-decipher-protein-folding-unfolding-at-a-local-scale
#12
Paul Grassein, Patrice Delarue, Harold Abraham Scheraga, Gia G Maisuradze, Patrick Senet
Protein folding/unfolding can be analysed experimentally at a local scale by monitoring the physical properties of local probes as a function of the temperature, as for example the distance between fluorophores or the values of chemical shifts of backbone atoms. Here, the analytical Lifson-Roig model for the helix-coil transition is modified to analyse local thermal unfolding of the fast-folder W protein of bacteriophage lambda (gpW) simulated by all-atom molecular dynamics (MD) simulations in explicit solvent at fifteen different temperatures...
February 15, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29446720/electrochemistry-of-alzheimer-disease-amyloid-beta-peptides
#13
Ana-Maria Chiorcea-Paquim, Teodor Adrian Enache, Ana Maria Oliveira-Brett
Alzheimer's disease (AD) is a widespread form of dementia that is estimated to affect 44.4 million people worldwide. AD pathology is closely related to the accumulation of amyloid beta (Aβ) peptides in fibrils and plagues, the small oligomeric intermediate species formed during the Aβ peptides aggregation presenting the highest neurotoxicity. This review discusses the recent advances on the Aβ peptides electrochemical characterisation. The Aβ peptides oxidation at a glassy carbon electrode occurs in one or two steps, depending on the amino acid sequence, length and content...
February 13, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29446125/feasibility-of-high-spatiotemporal-resolution-for-an-abbreviated-3d-radial-breast-mri-protocol
#14
Jorge E Jimenez, Roberta M Strigel, Kevin M Johnson, Leah C Henze Bancroft, Scott B Reeder, Walter F Block
PURPOSE: To develop a volumetric imaging technique with 0.8-mm isotropic resolution and 10-s/volume rate to detect and analyze breast lesions in a bilateral, dynamic, contrast-enhanced MRI exam. METHODS: A local low-rank temporal reconstruction approach that also uses parallel imaging and spatial compressed sensing was designed to create rapid volumetric frame rates during a contrast-enhanced breast exam (vastly undersampled isotropic projection [VIPR] spatial compressed sensing with temporal local low-rank [STELLR])...
February 14, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29445437/delayed-coil-migration-uncommon-cause-of-ischemic-stroke-and-retrieval-technique
#15
Mohammad Rauf Afzal, Mohtashim Arbaab Qureshi, Muhammad Shah Miran, Gustavo J Rodriguez, Alberto Maud, Rakesh Khatri
No abstract text is available yet for this article.
December 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/29445430/seizure-prophylaxis-in-the-immediate-post-hemorrhagic-period-in-patients-with-aneurysmal-subarachnoid-hemorrhage
#16
Thomas V Kodankandath, Salman Farooq, Wled Wazni, John-Andrew Cox, Christopher Southwood, Gregory Rozansky, Vijay Johnson, John R Lynch
Introduction: Seizures are a well-known complication of aneurysmal subarachnoid hemorrhage (aSAH) and occur most commonly in the immediate posthemorrhagic period. Most commonly used antiepileptic drugs (AEDs) for seizure prophylaxis in aSAH include phenytoin and levetiracetam. There is no reliable data available on the safety and efficacy of restricting AED prophylaxis only till the aneurysm is secured. Methods: We retrospectively chart reviewed patients admitted to our neurosciences intensive care unit (NICU) with aSAH during the past two years...
December 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/29444999/percutaneous-management-of-aortic-root-rupture-during-transcatheter-aortic-valve-replacement-with-coil-embolization
#17
Tarun Chakravarty, Justin Cox, Yigal Abramowitz, David Lange, Masaki Miyasaka, Suhail Dohad, Wen Cheng, Raj R Makkar
No abstract text is available yet for this article.
February 2018: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29444960/stent-assisted-coil-embolization-on-down-the-barrel-view-with-spring-shaped-microcatheter-in-patient-with-m1-ultrawide-necked-circumferential-aneurysm
#18
Hyo Sung Kwak, Jung Soo Park, Eun Jeong Koh
Herein, we describe a technique for stent-assisted coil embolization with a spring-shaped microcatheter in a patient with an M1 ultrawide-necked circumferential aneurysm in the middle cerebral artery (MCA). A 49-year-old man was referred for treatment of an incidentally detected M1 large-circumference aneurysm on magnetic resonance angiography. Subsequent digital subtraction angiography revealed an 18.2×16.5 mm ultrawide-necked circumferential aneurysm on the distal M1 portion of the left MCA, and we planned stent-assisted coil embolization using a spring-shaped microcatheter...
February 14, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29444748/aortopulmonary-collaterals-in-neonates-with-d-transposition-of-the-great-arteries-clinical-significance-early-after-arterial-switch-operation
#19
Alexandra Wipf, Martin Christmann, Susanne Navarini-Meury, Hitendu Dave, Daniel Quandt, Walter Knirsch, Oliver Kretschmar
OBJECTIVES: Purpose of this study is to evaluate the clinical significance of major aortopulmonary collateral arteries (MAPCAs) during the early postoperative course after arterial switch operation (ASO) in d-transposition of the great arteries (dTGA). METHODS: Clinical data of 98 patients with simple dTGA between January 2007 and December 2016 at the University Children's Hospital Zurich, Switzerland were analyzed retrospectively. RESULTS: 37 from 98 patients (38%) required cardiac catheterization (CC) due to an early complicated postoperative course or difficult coronary transfer due to special coronary anatomy...
February 2, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29444145/waggawagga-cli-a-command-line-tool-for-predicting-stable-single-%C3%AE-helices-sah-domains-and-the-sah-domain-distribution-across-eukaryotes
#20
Dominic Simm, Martin Kollmar
Stable single-alpha helices (SAH-domains) function as rigid connectors and constant force springs between structural domains, and can provide contact surfaces for protein-protein and protein-RNA interactions. SAH-domains mainly consist of charged amino acids and are monomeric and stable in polar solutions, characteristics which distinguish them from coiled-coil domains and intrinsically disordered regions. Although the number of reported SAH-domains is steadily increasing, genome-wide analyses of SAH-domains in eukaryotic genomes are still missing...
2018: PloS One
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"