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https://www.readbyqxmd.com/read/28438632/molecular-diagnostic-development-for-two-begomovirus-betasatellite-complexes-undergoing-diversification-a-case-study
#1
Judith K Brown, Muhammad Zia Ur-Rehman, Sofia Avelar, N Chingandu, Usman Hameed, Saleem Haider, Muhammad Ilyas
At least five begomoviral species that cause leaf curl disease of cotton have emerged recently in Asia and Africa, reducing fiber quality and yield. The potential for the spread of these viruses to other cotton-vegetable growing regions throughout the world is extensive, owing to routine, global transport of alternative hosts of the leaf curl viruses, especially ornamentals. The research reported here describes the design and validation of polymerase chain reaction (PCR) primers undertaken to facilitate molecular detection of the two most-prevalent leaf curl-associated begomovirus-betasatellite complexes in the Indian Subcontinent and Africa, the Cotton leaf curl Kokhran virus-Burewala strain and Cotton leaf curl Gezira virus, endemic to Asia and Africa, respectively...
April 21, 2017: Virus Research
https://www.readbyqxmd.com/read/28436646/filaments-with-affinity-binding-and-wet-strength-can-be-achieved-by-spinning-bifunctional-cellulose-nanofibrils
#2
Maija Vuoriluoto, Hannes Orelma, Meri Johanna Lundahl, Maryam Borghei, Orlando J Rojas
We demonstrate benzophenone (BP) conjugation via amine-reactive esters onto oxidized cellulosic fibers that were used as precursors, after microfluidization, of photo-active cellulose nanofibrils (CNF). From these fibrils, cellulose I filaments were synthesized by hydrogel spinning in an anti-solvent followed by fast bi-radical UV crosslinking. As a result, the BP-CNF filaments developed a wet tensile strength of up to ~105 MPa (a remarkable retention of ~80% of the dry strength). Thus, the principal limitation of these emerging materials was resolved (< 0...
April 24, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28430252/measuring-spatiotemporal-ultrafast-field-structures-of-pulses-from-multimode-optical-fibers
#3
Zhe Guang, Michelle Rhodes, Rick Trebino
Ultrashort pulses emerging from multimode optical fibers are spatiotemporally complex, because inside these fibers the modes have different spatial intensity patterns and experience different propagation velocities and dispersions. To determine the spatiotemporal field from multimode fibers, we applied a technique for the complete measurement of the output pulses called a spatially and temporally resolved intensity and phase evaluation device: full information from a single hologram. It yields the complete electric field over space and time from multiple digital holograms, simultaneously recorded at different frequencies on a single camera frame...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28427062/emerging-issues-for-optical-coherence-tomography
#4
Luisa Pierro, Alessandro Rabiolo
Almost 25 years after its introduction, optical coherence tomography (OCT) is still a crucial test in the evaluation of patients affected by diabetic retinopathy. In this chapter, the authors provide an extensive overview of the posterior segment pathological changes induced by diabetes, characterized using OCT. OCT plays a key role in diabetic macular edema (DME) as it assesses related retinal changes both in a qualitative (i.e., DME pattern, presence and aspects of cysts, fluid localization, integrity, and reflectivity of retinal layers) and quantitative (i...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28424631/mechanisms-underlying-the-emergence-of-post-acidosis-arrhythmia-at-the-tissue-level-a-theoretical-study
#5
Jieyun Bai, Renli Yin, Kuanquan Wang, Henggui Zhang
Acidosis has complex electrophysiological effects, which are associated with a high recurrence of ventricular arrhythmias. Through multi-scale cardiac computer modeling, this study investigated the mechanisms underlying the emergence of post-acidosis arrhythmia at the tissue level. In simulations, ten Tusscher-Panfilov ventricular model was modified to incorporate various data on acidosis-induced alterations of cellular electrophysiology and intercellular electrical coupling. The single cell models were incorporated into multicellular one-dimensional (1D) fiber and 2D sheet tissue models...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28424630/hippo-pathway-and-skeletal-muscle-mass-regulation-in-mammals-a-controversial-relationship
#6
REVIEW
Olouyomi Gnimassou, Marc Francaux, Louise Deldicque
Skeletal muscle mass reflects a dynamic turnover between net protein synthesis and degradation. In addition, satellite cell inclusion may contribute to increase muscle mass while fiber loss results in a reduction of muscle mass. Since 2010, a few studies looked at the involvement of the newly discovered Hippo pathway in the regulation of muscle mass. In line with its roles in other organs, it has been hypothesized that the Hippo pathway could play a role in different regulatory mechanisms in skeletal muscle as well, namely proliferation and renewal of satellite cells, differentiation, death, and growth of myogenic cells...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28419058/a-method-for-u-fiber-quantification-from-7%C3%A2-t-diffusion-weighted-mri-data-tested-in-patients-with-nonlesional-focal-epilepsy
#7
Rafael O'Halloran, Rebecca Feldman, Lara Marcuse, Madeline Fields, Bradley Delman, Sophia Frangou, Priti Balchandani
In this methods development, we present an ultra-high-field, diffusion-weighted MRI method to quantitatively assess u-fibers and use it to compare u-fiber counts in nonlesional epilepsy patients with controls. Emerging evidence implicates white matter abnormalities in nonlesional epilepsy, including the short-range, cortical-cortical connections, or u-fibers. Eight patients with nonlesional epilepsy and eight demographically matched controls underwent 7 T MRI consisting of a T1-weighted sequence (0.7 mm isotropic resolution) and high-angular-resolved diffusion-weighted MRI (1...
May 24, 2017: Neuroreport
https://www.readbyqxmd.com/read/28418563/tensile-mechanical-properties-and-dynamic-collagen-fiber-re-alignment-of-the-murine-cervix-are-dramatically-altered-throughout-pregnancy
#8
Carrie E Barnum, Jennifer L Fey, Stephanie N Weiss, Guillermo Barila, Amy G Brown, Brianne K Connizzo, Snehal S Shetye, Michal A Elovitz, Louis J Soslowsky
The cervix is a unique organ able to dramatically change its shape and function by serving as a physical barrier for the growing fetus and then undergoing dramatic dilation allowing for delivery of a term infant. As a result, the cervix endures changing mechanical forces from the growing fetus. There is an emerging concept that the cervix may change or remodel "early" in many cases of spontaneous preterm birth. However, the mechanical role of the cervix in both normal and preterm birth remains unclear. Therefore, the primary objective of this study was to determine the mechanical and structural response of murine cervical tissue throughout a normal gestational time course...
April 17, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28409519/off-line-analysis-of-electro-anatomical-mapping-in-ventricular-arrhythmias
#9
Daniele Muser, Jackson J Liang, Pasquale Santangeli
Sudden cardiac death due to ventricular tachycardia (VT) is a major health issue in patients with structural heart disease and depressed ejection fraction. If from one side, implantable cardioverter defibrillator (ICD) therapy has significantly improved survival of these patients, on the other hand, it has led to frequent ICD shocks as an emerging problem, being associated with poor quality of life, frequent hospitalizations and increased mortality. Scar-related reentry due to the coexistence of surviving myocardial fibers within fibrotic tissue is the most common mechanism subtending VT both in ischemic and non-ischemic cardiomyopathies...
April 12, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28406526/changes-in-the-nutritional-quality-of-five-mangifera-species-harvested-in-two-maturity-stages
#10
Ignacio Barbosa Gámez, Karla P Caballero Montoya, Noris Ledesma, Sonia G Sáyago Ayerdi, María de Lourdes Gacía-Magaña, Eric J von Wettberg, Efigenia Montalvo-González
BACKGROUND: There are 69 species of edible Mangifera recognized in Southeast Asia. Most of these species have not been characterized for nutritional properties. Here we describe the nutritional quality of the pulp of several Mangifera species: Mangifera casturi, Mangifera lalijiwa, Mangifera odorata, Mangifera zeylanica and two cultivars of Mangifera indica 'Tommy-Kent' and 'Tommy Atkins' at two maturity stages. RESULTS: The results show that nutritional quality varied with the maturity stage and among the species...
April 13, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28399374/role-of-hydrophobic-aromatic-residues-on-the-stability-of-double-wall-%C3%AE-sheet-structures-formed-by-a-triblock-peptide
#11
Beytullah Ozgur, Mehmet Sayar
Bioinspired self-assembling peptides serve as powerful building blocks in the manufacturing of nanomaterials with tailored features. Because of their ease of synthesis, biocompatibility, and tunable activity, this emerging branch of biomolecules has become very popular. The triblock peptide architecture designed by the Hartgerink group is a versatile system that allows control over its assembly and has been shown to demonstrate tunable bioactivity. Three main forces, Coulomb repulsion, hydrogen bonding and hydrophobicity act together to guide the triblock peptides' assembly into one-dimensional objects and hydrogels...
April 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28396882/afferent-fiber-remodeling-in-the-somatosensory-thalamus-of-mice-as-a-neural-basis-of-somatotopic-reorganization-in-the-brain-and-ectopic-mechanical-hypersensitivity-after-peripheral-sensory-nerve-injury
#12
Yuichi Takeuchi, Hironobu Osaki, Yuki Yagasaki, Yoko Katayama, Mariko Miyata
Plastic changes in the CNS in response to peripheral sensory nerve injury are a series of complex processes, ranging from local circuit remodeling to somatotopic reorganization. However, the link between circuit remodeling and somatotopic reorganization remains unclear. We have previously reported that transection of the primary whisker sensory nerve causes the abnormal rewiring of lemniscal fibers (sensory afferents) on a neuron in the mouse whisker sensory thalamus (V2 VPM). In the present study, using transgenic mice whose lemniscal fibers originate from the whisker sensory principle trigeminal nucleus (PrV2) are specifically labeled, we identified that the transection induced retraction of PrV2-originating lemniscal fibers and invasion of those not originating from PrV2 in the V2 VPM...
March 2017: ENeuro
https://www.readbyqxmd.com/read/28379070/adsorption-mechanism-of-2-4-dichlorophenoxyacetic-acid-onto-nitric-acid-modified-activated-carbon-fiber
#13
Qun Li, Jie Sun, Tianhao Ren, Lin Guo, Zhilin Yang, Qi Yang, Hai Chen
Adsorption by carbon materials is one of the relatively fast methods in present research, which is widely used in emergency events. The features of this study were mainly involved modification of adsorbent and analysis of the effect of surface structure for the removal of contaminant. Activated carbon fiber (ACF) modified by nitric acid (N-ACF) was studied to determine the adsorption performance for 2,4-dichlorophenoxyacetic acid (2,4-D). Subsequently, influence factors, adsorption isotherm models, kinetics and thermodynamics were investigated in a batch system...
April 5, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28378234/core-curriculum-case-illustration-stieda-fracture-avulsion-fracture-of-the-medial-femoral-condyle
#14
Shaimaa Abdelhassib Fadl, Jeffrey D Robinson
This is the 30th installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online please visit the ASER Core Curriculum and Recommendations for Study online at: http://www.erad.org/page/CCIP_TOC . A Stieda fracture is an avulsion injury from the medial femoral condyle of the origin of the medial collateral ligament...
April 4, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28374840/brillouin-scattering-induced-rogue-waves-in-self-pulsing-fiber-lasers
#15
Pierre-Henry Hanzard, Mohamed Talbi, Djouher Mallek, Abdelhamid Kellou, Hervé Leblond, François Sanchez, Thomas Godin, Ammar Hideur
We report the experimental observation of extreme instabilities in a self-pulsing fiber laser under the influence of stimulated Brillouin scattering (SBS). Specifically, we observe temporally localized structures with high intensities that can be referred to as rogue events through their statistical behaviour with highly-skewed intensity distributions. The emergence of these SBS-induced rogue waves is attributed to the interplay between laser operation and resonant Stokes orders. As this behaviour is not accounted for by existing models, we also present numerical simulations showing that such instabilities can be observed in chaotic laser operation...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28368982/spinal-cord-stimulation-in-chronic-pain-mode-of-action
#16
Ricardo Vallejo, Kerry Bradley, Leonardo Kapural
OBJECTIVE: A review of the literature that presents a perspective on mechanisms of actions behind spinal cord stimulation (SCS) therapy for chronic pain. SUMMARY OF BACKGROUND DATA: SCS is an effective therapeutic alternative for the treatment of intractable chronic pain. Its application has been mostly based on the Gate Control Theory (GCT) of pain. Computational models have been fundamental on the understanding of clinical observations and the design of therapies that provide optimal neuromodulation...
March 31, 2017: Spine
https://www.readbyqxmd.com/read/28367451/membrane-cholesterol-in-skeletal-muscle-a-novel-player-in-excitation-contraction-coupling-and-insulin-resistance
#17
REVIEW
G Barrientos, P Sánchez-Aguilera, E Jaimovich, C Hidalgo, P Llanos
Membrane cholesterol is critical for signaling processes in a variety of tissues. We will address here current evidence supporting an emerging role of cholesterol on excitation-contraction coupling and glucose transport in skeletal muscle. We have centered our review on the transverse tubule system, a complex network of narrow plasma membrane invaginations that propagate membrane depolarization into the fiber interior and allow nutrient delivery into the fibers. We will discuss current evidence showing that transverse tubule membranes have remarkably high cholesterol levels and we will address how modifications of cholesterol content influence excitation-contraction coupling...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28353335/porous-functionalized-self-standing-carbon-fiber-paper-electrodes-for-high-performance-capacitive-energy-storage
#18
Yuanyuan Zhu, Shuang Cheng, Weijia Zhou, Jin Jia, Lufeng Yang, Minghai Yao, Mengkun Wang, Peng Wu, Haowei Luo, Meilin Liu
A facile and cost-efficient approach to functionalize raw carbon fiber paper (CFP) used for a self-standing capacitive electrode has been proposed here. Benefiting from the improved specific surface area and surface functional groups, the functionalized CFP (F-CFP) showed much enhanced capacitive performance, 3 orders of magnitude higher than that of the raw CFP. It delivered the areal capacitance of 1275 mF cm(-2) at 5 mA cm(-2) with a rather wide voltage window of 1.4 V (-0.4 to 1 V vs Ag/AgCl) in 0.5 M H2SO4...
April 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28350466/wrapping-aligned-carbon-nanotube-composite-sheets-around-vanadium-nitride-nanowire-arrays-for-asymmetric-coaxial-fiber-shaped-supercapacitors-with-ultrahigh-energy-density
#19
Qichong Zhang, Xiaona Wang, Zhenghui Pan, Juan Sun, Jingxin Zhao, Jun Zhang, Cuixia Zhang, Lei Tang, Jie Luo, Bin Song, Zengxing Zhang, Weibang Lu, Qingwen Li, Yuegang Zhang, Yagang Yao
The emergence of fiber-shaped supercapacitors (FSSs) has led to a revolution in portable and wearable electronic devices. However, obtaining high energy density FSSs for practical applications is still a key challenge. This article exhibits a facile and effective approach to directly grow well-aligned three-dimensional vanadium nitride (VN) nanowire arrays (NWAs) on carbon nanotube (CNT) fiber with an ultrahigh specific capacitance of 715 mF/cm(2) in a three-electrode system. Benefiting from their intriguing structural features, we successfully fabricated a prototype asymmetric coaxial FSS (ACFSS) with a maximum operating voltage of 1...
March 30, 2017: Nano Letters
https://www.readbyqxmd.com/read/28341304/the-normal-variants-in-the-left-bundle-branch-system
#20
REVIEW
M V Elizari
This article reviewed the main anatomic and physiopathological aspects of the left bundle branch from its origin in the His bundle and its intraventricular distribution on the left endocardial surface. The results are based on the relevant literature and on personal observations executed on 206 hearts distributed as follows: 67 dogs, 60 humans, 45 sheep, 22 pigs, 10 cows, 2 monkeys, 1 guanaco, and 1 sea lion. The main anatomical features of the His-Purkinje conducting system may be summarized as follows: The bundle of His is composed by two segments: the penetrating and branching portions...
March 14, 2017: Journal of Electrocardiology
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