keyword
MENU ▼
Read by QxMD icon Read
search

Parallel fiber

keyword
https://www.readbyqxmd.com/read/28816097/meltblown-polymer-fabrics-as-candidate-scaffolds-for-rotator-cuff-tendon-tissue-engineering
#1
Thomas Jenkins, Sean Meehan, Behnam Pourdeyhimi, Dianne Little
Various biomaterial technologies are promising for tissue engineering, including electrospinning, but commercial scale-up of throughput is difficult. The goal of the study was to evaluate meltblown fabrics as candidate scaffolds for rotator cuff tendon tissue engineering. Meltblown poly(lactic acid) fabrics were produced with several polymer crystallinities and airflow velocities (500(low), 900(medium) or 1400(high) m<sup>3</sup>air/hour/m fabric). Fiber diameter, alignment, and baseline bi-directional tensile mechanical properties were evaluated...
August 17, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28800110/response-of-dermal-fibroblasts-to-biochemical-and-physical-cues-in-aligned-polycaprolactone-silk-fibroin-nanofiber-scaffolds-for-application-in-tendon-tissue-engineering
#2
Chih-Hao Chen, Shih-Hsien Chen, Chang-Yi Kuo, Meng-Lun Li, Jyh-Ping Chen
Silk fibroin (SF) and fiber alignment were introduced into polycaprolactone (PCL)-based electrospun nanofibers as chemical and physical cues for tendon tissue engineering applications. The physicochemical properties of random PCL (RP) nanofibers, random PCL/SF (RPSF) nanofibers and aligned PCL/SF (APSF) nanofibers were characterized for fiber orientation and SF blending effects. An in vitro cell culture with rabbit dermal fibroblasts (RDFBs) on nanofibers indicated that SF promotes cell proliferation to a higher extent than fiber alignment...
August 11, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28796185/performance-of-electropun-polyacrylonitrile-nanofibrous-phases-shown-for-the-separation-of-water-soluble-food-dyes-via-utlc-vis-esi-ms
#3
Pimolpun Niamlang, Pitt Supaphol, Gertrud E Morlock
Research in the miniaturization of planar chromatography led to various approaches in manufacturing ultrathin-layer chromatography (UTLC) layers of reduced thickness (<50 µm) along with smaller instrumentation, as targeted in Office Chromatography. This novel concept merges 3D print & media technologies with miniaturized planar chromatography to realize an all-in-one instrument, in which all steps of UTLC are automated and integrated in the same tiny device. In this context, the development of electrospun polyacrylonitrile (PAN) nanofiber phases was investigated as well as its performance...
August 10, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28795778/time-dependent-effect-of-electrical-stimulation-on-osteogenic-differentiation-of-bone-mesenchymal-stromal-cells-cultured-on-conductive-nanofibers
#4
Siqi Zhu, Wei Jing, Xiaoqing Hu, Zirong Huang, Qing Cai, Yingfang Ao, Xiaoping Yang
Bone tissue engineering using bone mesenchymal stromal cells (BMSCs) is a multidisciplinary strategy that requires biodegradable scaffold, cell, various promoting cues to work simultaneously. Electrical stimulation (ES) is known able to promote osteogenic differentiation of BMSCs, but it is interesting to know how can it play the strongest promotion effect. To strengthen local ES on BMSCs, parallel-aligned conductive nanofibers were electrospun from the mixtures of poly(L-lactide) (PLLA) and multi-walled carbon nanotubes (MWCNTs), and used for cell culture...
August 10, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28774442/computational-modeling-for-prediction-of-the-shear-stress-of-three-dimensional-isotropic-and-aligned-fiber-networks
#5
Seungman Park
BACKGROUND AND OBJECTIVE: Interstitial flow (IF) is a creeping flow through the interstitial space of the extracellular matrix (ECM). IF plays a key role in diverse biological functions, such as tissue homeostasis, cell function and behavior. Currently, most studies that have characterized IF have focused on the permeability of ECM or shear stress distribution on the cells, but less is known about the prediction of shear stress on the individual fibers or fiber networks despite its significance in the alignment of matrix fibers and cells observed in fibrotic or wound tissues...
September 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28770356/radial-mri-with-variable-echo-times-reducing-the-orientation-dependency-of-susceptibility-artifacts-of-an-mr-safe-guidewire
#6
Katharina E Schleicher, Michael Bock, Klaus Düring, Stefan Kroboth, Axel J Krafft
OBJECTIVES: Guidewires are indispensable tools for intravascular MR-guided interventions. Recently, an MR-safe guidewire made from a glass-fiber/epoxy compound material with embedded iron particles was developed. The size of the induced susceptibility artifact, and thus the guidewire's visibility, depends on its orientation against B 0. We present a radial acquisition scheme with variable echo times that aims to reduce the artifact's orientation dependency. MATERIALS AND METHODS: The radial acquisition scheme uses sine-squared modulated echo times depending on the physical direction of the spoke to balance the susceptibility artifact of the guidewire...
August 2, 2017: Magma
https://www.readbyqxmd.com/read/28768816/functional-specialization-of-cellulose-synthase-isoforms-in-a-moss-shows-parallels-with-seed-plants
#7
Joanna H Norris, Xingxing Li, Shixin Huang, Allison van de Meene, Mai L Tran, Erin Killeavy, Arielle M Chaves, Bailey Mallon, Danielle Mercure, Hwei-Ting Tan, Rachel A Burton, Monika Susanne Doblin, Seong H Kim, Alison W Roberts
The secondary cell walls of tracheary elements and fibers are rich in cellulose microfibrils that are helically oriented and laterally aggregated. Support cells within the leaf midribs of mosses deposit cellulose-rich secondary cell walls, but their biosynthesis and microfibril organization have not been examined. Although the Cellulose Synthase (CESA) gene families of mosses and seed plants diversified independently, CESA knockout analysis in the moss Physcomitrella patens revealed parallels in CESA functional specialization of Arabidopsis and P...
August 2, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28767060/hybrid-structure-multichannel-all-fiber-current-sensor
#8
Junzhen Jiang, Hao Zhang, Youwu He, Yishen Qiu
We have experimentally developed a hybrid-structure multi-channel all-fiber current sensor with ordinary silica fiber using fiber loop architecture. According to the rationale of time division multiplexing, the sensor combines parallel and serial structures. The purpose of the hybrid-structure multi-channel all-fiber current sensor is to get more information from the different measured points simultaneously. In addition, the hybrid-structure fiber current sensor exhibited a good linear response for each channel...
August 2, 2017: Sensors
https://www.readbyqxmd.com/read/28766853/axtract-toward-microstructure-informed-tractography
#9
Gabriel Girard, Alessandro Daducci, Laurent Petit, Jean-Philippe Thiran, Kevin Whittingstall, Rachid Deriche, Demian Wassermann, Maxime Descoteaux
Diffusion-weighted (DW) magnetic resonance imaging (MRI) tractography has become the tool of choice to probe the human brain's white matter in vivo. However, tractography algorithms produce a large number of erroneous streamlines (false positives), largely due to complex ambiguous tissue configurations. Moreover, the relationship between the resulting streamlines and the underlying white matter microstructure characteristics remains poorly understood. In this work, we introduce a new approach to simultaneously reconstruct white matter fascicles and characterize the apparent distribution of axon diameters within fascicles...
August 2, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28751635/microfluidic-cell-retention-device-for-perfusion-of-mammalian-suspension-culture
#10
Taehong Kwon, Holly Prentice, Jonas De Oliveira, Nyasha Madziva, Majid Ebrahimi Warkiani, Jean-François P Hamel, Jongyoon Han
Continuous production of biologics, a growing trend in the biopharmaceutical industry, requires a reliable and efficient cell retention device that also maintains cell viability. Current filtration methods, such as tangential flow filtration using hollow-fiber membranes, suffer from membrane fouling, leading to significant reliability and productivity issues such as low cell viability, product retention, and an increased contamination risk associated with filter replacement. We introduce a novel cell retention device based on inertial sorting for perfusion culture of suspended mammalian cells...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28726969/a-fiber-asymmetric-supercapacitor-based-on-feooh-ppy-on-carbon-fibers-as-an-anode-electrode-with-high-volumetric-energy-density-for-wearable-applications
#11
Xuefei Gong, Shaohui Li, Pooi See Lee
Fiber supercapacitors are promising energy storage devices for wearable applications. However, the fiber supercapacitors are currently limited by the mediocre capacitance performances due to the use of typical carbon materials as the anode, sacrificing the volumetric energy density of the whole device. In addition, the inability to undergo washable cycles and poor self-discharge rate prevents the fiber-shaped supercapacitors from being a true energy textile and affects their practicability. Hence, the porous anode electrode FeOOH/PPy@CF has been firstly prepared with a high volumetric capacitance of 30...
August 3, 2017: Nanoscale
https://www.readbyqxmd.com/read/28722281/collagen-organization-regulates-stretch-initiated-pain-related-neuronal-signals-in-vitro-implications-for-structure-function-relationships-in-innervated-ligaments
#12
Sijia Zhang, Sagar Singh, Beth A Winkelstein
Injury to the spinal facet capsule, an innervated ligament with heterogeneous collagen organization, produces pain. Although mechanical facet joint trauma activates embedded afferents, it is unclear if, and how, the varied extracellular microstructure of its ligament affects sensory transduction for pain from mechanical inputs. To investigate the effects of macroscopic deformations on afferents in collagen matrices with different organizations, an in vitro neuron-collagen construct (NCC) model was used. NCCs with either randomly organized or parallel aligned collagen fibers were used to mimic the varied microstructure in the facet capsular ligament...
July 19, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28722183/a-rare-polyglycine-type-ii-like-helix-motif-in-naturally-occurring-proteins
#13
Eberhard Warkentin, Sina Weidenweber, Karola Schühle, Ulrike Demmer, Johann Heider, Ulrich Ermler
Common structural elements in proteins such as α-helices or β-sheets are characterized by uniformly repeating, energetically favorable main chain conformations which additionally exhibit a completely saturated hydrogen-bonding network of the main chain NH and CO groups. Although polyproline or polyglycine type II helices (PPII or PGII ) are frequently found in proteins, they are not considered as equivalent secondary structure elements because they do not form a similar self-contained hydrogen-bonding network of the main chain atoms...
July 19, 2017: Proteins
https://www.readbyqxmd.com/read/28717897/development-of-a-fast-and-cost-effective-gas-chromatography-mass-spectrometry-method-for-the-quantification-of-short-chain-and-medium-chain-fatty-acids-in-human-biofluids
#14
Cesare Lotti, Josep Rubert, Francesca Fava, Kieran Tuohy, Fulvio Mattivi, Urska Vrhovsek
The quantification of short-chain and medium-chain fatty acids is becoming more and more relevant in fecal and plasma samples due to their biological impact, which has been associated with colon rectal cancer and fiber consumption. For these reasons, a fast, cost-effective, and reproducible analytical method is highly required. In this research, a gas chromatography-mass spectrometry method based on full scan and multiple reaction monitoring (MRM) acquisition modes were optimized and validated for the analysis of short-chain and medium-chain fatty acids in three biological samples: human fecal water, fecal fermentation supernatants, and human plasma...
July 17, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28715029/anisotropic-microfibrous-scaffolds-enhance-the-organization-and-function-of-cardiomyocytes-derived-from-induced-pluripotent-stem-cells
#15
Maureen Wanjare, Luqia Hou, Karina H Nakayama, Joseph J Kim, Nicholas P Mezak, Oscar J Abilez, Evangeline Tzatzalos, Joseph C Wu, Ngan F Huang
Engineering of myocardial tissue constructs is a promising approach for treatment of coronary heart disease. To engineer myocardial tissues that better mimic the highly ordered physiological arrangement and function of native cardiomyocytes, we generated electrospun microfibrous polycaprolactone scaffolds with either randomly oriented (14 μm fiber diameter) or parallel-aligned (7 μm fiber diameter) microfiber arrangement and co-seeded the scaffolds with human induced pluripotent stem cell-derived cardiomyocytes (iCMs) and endothelial cells (iECs) for up to 12 days after iCM seeding...
July 25, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28699115/non-cellulosic-polysaccharide-distribution-during-g-layer-formation-in-poplar-tension-wood-fibers-abundance-of-rhamnogalacturonan-i-and-arabinogalactan-proteins-but-no-evidence-of-xyloglucan
#16
Fernanda Trilstz Perassolo Guedes, Françoise Laurans, Bernard Quemener, Carole Assor, Véronique Lainé-Prade, Nathalie Boizot, Jacqueline Vigouroux, Marie-Claude Lesage-Descauses, Jean-Charles Leplé, Annabelle Déjardin, Gilles Pilate
RG-I and AGP, but not XG, are associated to the building of the peculiar mechanical properties of tension wood. Hardwood trees produce tension wood (TW) with specific mechanical properties to cope with environmental cues. Poplar TW fibers have an additional cell wall layer, the G-layer responsible for TW mechanical properties. We investigated, in two poplar hybrid species, the molecules potentially involved in the building of TW mechanical properties. First, we evaluated the distribution of the different classes of non-cellulosic polysaccharides during xylem fiber differentiation, using immunolocalization...
July 11, 2017: Planta
https://www.readbyqxmd.com/read/28698888/modulation-of-complex-spike-duration-and-probability-during-cerebellar-motor-learning-in-visually-guided-smooth-pursuit-eye-movements-of-monkeys
#17
Yan Yang, Stephen G Lisberger
Activation of an inferior olivary neuron powerfully excites Purkinje cells via its climbing fiber input and triggers a characteristic high-frequency burst, known as the complex spike (CS). The theory of cerebellar learning postulates that the CS induces long-lasting depression of the strength of synapses from active parallel fibers onto Purkinje cells, and that synaptic depression leads to changes in behavior. Prior reports showed that a CS on one learning trial is linked to a properly timed depression of simple spikes on the subsequent trial, as well as a learned change in pursuit eye movement...
May 2017: ENeuro
https://www.readbyqxmd.com/read/28698109/myelin-structure-in-unfixed-single-nerve-fibers-scanning-x-ray-microdiffraction-with-a-beam-size-of-200-nm
#18
Hideyo Inouye, Fong-Hsu Kuo, Andrew R Denninger, Britta Weinhausen, Manfred Burghammer, Daniel A Kirschner
Previous raster-scanning with a 1 μm x-ray beam of individual, myelinated fibers from glutaraldehyde-fixed rat sciatic nerve revealed a spatially-dependent variation in the diffraction patterns from single fibers. Analysis indicated differences in the myelin periodicity, membrane separations, distribution of proteins, and orientaion of membrane lamellae. As chemical fixation is known to produce structural artifacts, we sought to determine in the current study whether the structural heterogeneity is intrinsic to unfixed myelin...
July 8, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/28698090/the-superior-frontal-transsulcal-approach-to-the-anterior-ventricular-system-exploring-the-sulcal-and-subcortical-anatomy-using-anatomic-dissections-and-dti-tractography
#19
Christos Koutsarnakis, Faidon Liakos, Aristotelis V Kalyvas, Georgios P Skandalakis, Spyros Komaitis, Fotini Christidi, Efstratios Karavasilis, Evangellia Liouta, George Stranjalis
OBJECTIVE: To explore the superior frontal sulcus morphology, trajectory of the applied surgical corridor and white matter bundles that are traversed during the superior frontal transsulcal transventricular approach METHODS: Twenty (20) normal, adult, formalin-fixed cerebral hemispheres and two (2) cadaveric heads were included in the study. The superior frontal sulcus (SFS) topography, morphology and dimensions were recorded in all specimens. Fourteen (14) hemispheres were investigated through the fiber dissection technique while the remaining six (6) were explored using coronal cuts...
July 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28694242/chromatin-stiffening-underlies-enhanced-locus-mobility-after-dna-damage-in-budding-yeast
#20
Sébastien Herbert, Alice Brion, Jean-Michel Arbona, Mickaël Lelek, Adeline Veillet, Benoît Lelandais, Jyotsana Parmar, Fabiola García Fernández, Etienne Almayrac, Yasmine Khalil, Eleonore Birgy, Emmanuelle Fabre, Christophe Zimmer
DNA double-strand breaks (DSBs) induce a cellular response that involves histone modifications and chromatin remodeling at the damaged site and increases chromosome dynamics both locally at the damaged site and globally in the nucleus. In parallel, it has become clear that the spatial organization and dynamics of chromosomes can be largely explained by the statistical properties of tethered, but randomly moving, polymer chains, characterized mainly by their rigidity and compaction. How these properties of chromatin are affected during DNA damage remains, however, unclear...
July 10, 2017: EMBO Journal
keyword
keyword
13624
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"