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https://www.readbyqxmd.com/read/28636819/superelastic-pseudocapacitors-from-freestanding-mno2-decorated-graphene-coated-carbon-nanotube-aerogels
#1
Yepin Zhao, Maxwell Patrick Li, Siyuan Liu, Mohammad F Islam
In recent years, the demand for emerging electronic devices has driven efforts to develop electrochemical capacitors with high power and energy densities that can preserve capacitance under and after recovery from mechanical deformation. We have developed superelastic pseudocapacitors using ≈ 1.5 mm thick graphene-coated single-walled carbon nanotube (SWCNT) aerogels decorated with manganese oxide (MnO2) as freestanding electrodes that retain high volumetric capacitance and electrochemical stability before, under, and after recovery from 50% compression...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28634463/protective-effect-of-n-acetylcysteine-amide-on-blast-induced-increase-in-intracranial-pressure-in-rats
#2
Usmah Kawoos, Richard M McCarron, Mikulas Chavko
Blast-induced traumatic brain injury is associated with acute and possibly chronic elevation of intracranial pressure (ICP). The outcome after TBI is dependent on the progression of complex processes which are mediated by oxidative stress. So far, no effective pharmacological protection against TBI exists. In this study, rats were exposed to a single or repetitive blast overpressure (BOP) at moderate intensities of 72 or 110 kPa in a compressed air-driven shock tube. The degree and duration of the increase in ICP were proportional to the intensity and frequency of the blast exposure(s)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28634002/acupressure-therapy-for-acute-ankle-sprains-a-randomized-clinical-trial
#3
Mingxing Zhao, Wei Gao, Long Zhang, Wei Huang, Sihua Zheng, Guanliang Wang, Brian Y Hong, Baoyong Tang
BACKGROUND: Ankle sprains occur frequently among young and active people, accounting for almost two million injuries per year. Previous reports suggest that acupressure therapy for acute ankle sprains may shorten the recovery time. OBJECTIVE: To evaluate whether acupressure therapy can improve ankle sprain recovery when compared to standard RICE (rest, ice, compression, and elevation) treatment. DESIGN: A randomized controlled trial was conducted...
June 17, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28630918/compressed-glassy-carbon-an-ultrastrong-and-elastic-interpenetrating-graphene-network
#4
Meng Hu, Julong He, Zhisheng Zhao, Timothy A Strobel, Wentao Hu, Dongli Yu, Hao Sun, Lingyu Liu, Zihe Li, Mengdong Ma, Yoshio Kono, Jinfu Shu, Ho-Kwang Mao, Yingwei Fei, Guoyin Shen, Yanbin Wang, Stephen J Juhl, Jian Yu Huang, Zhongyuan Liu, Bo Xu, Yongjun Tian
Carbon's unique ability to have both sp(2) and sp(3) bonding states gives rise to a range of physical attributes, including excellent mechanical and electrical properties. We show that a series of lightweight, ultrastrong, hard, elastic, and conductive carbons are recovered after compressing sp(2)-hybridized glassy carbon at various temperatures. Compression induces the local buckling of graphene sheets through sp(3) nodes to form interpenetrating graphene networks with long-range disorder and short-range order on the nanometer scale...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28629217/ultrasensitive-pressure-sensor-based-on-ultralight-sparkling-graphene-block
#5
Lingxiao Lv, Panpan Zhang, Tong Xu, Liangti Qu
Approaching to the super-sensitivity, we herein develop a pressure sensor based on fully bubbled ultralight graphene block through a simple sparkling strategy. The obtained sparking graphene block (SGB) exhibits excellent elasticity even at 95% compressive strain and rebounds a steel ball with an ultra-fast recovery speed (~1085 mm s-1). Particularly, the SGB based sensor reveals a record pressure sensitivity of 229.8 kPa-1, much higher than other graphene materials due to the highly cavity-branched internal structure...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28629044/recovery-evaluation-of-rats-damaged-tibias-implantation-of-core-shell-structured-bone-scaffolds-made-using-hollow-braids-and-a-freeze-thawing-process
#6
Jia-Horng Lin, Mong-Chuan Lee, Chih-Kuang Chen, Chien-Lin Huang, Yueh-Sheng Chen, Shih-Peng Wen, Shu-Ting Kuo, Ching-Wen Lou
This study prepares biodegradable bone scaffolds helping the recovery of damaged tibias of rats. Polyvinyl alcohol (PVA) plied yarns are fabricated into hollow braids. The braids are combined with hydroxyapatite (HA)/gelatin/PVA mixtures and processed using freeze-thawing and freeze-drying processes in order to form bone scaffolds. These bone scaffolds are observed by scanning electron scope (SEM) and tested for compression strength. Afterwards, recovery of damaged bone, the morphology of the bone, and the histological observation are evaluated...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28623403/diffusion-tensor-imaging-can-predict-surgical-outcomes-of-patients-with-cervical-compression-myelopathy
#7
Satoshi Maki, Masao Koda, Mitsuhiro Kitamura, Taigo Inada, Koshiro Kamiya, Mitsutoshi Ota, Yasushi Iijima, Junya Saito, Yoshitada Masuda, Koji Matsumoto, Masatoshi Kojima, Takayuki Obata, Kazuhisa Takahashi, Masashi Yamazaki, Takeo Furuya
PURPOSE: The aim of this study was to assess the potential role of diffusion tensor imaging (DTI) as a predictor of surgical outcomes in patients with cervical compressive myelopathy (CCM). Surgical decompression is often recommended for symptomatic CCM. It is important to know the prognosis of surgical outcomes and to recommend appropriate timing for surgery. METHODS: We enrolled 26 patients with CCM who underwent surgery. The Japanese Orthopaedic Association (JOA) score for cervical myelopathy was evaluated before and 6 months after surgery...
June 16, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28619497/long-term-functional-outcome-of-symptomatic-unruptured-intracranial-aneurysms-in-an-interdisciplinary-treatment-concept
#8
M Kunz, F Dorn, T Greve, V Stoecklein, J C Tonn, H Brückmann, Ch Schichor
OBJECTIVE: In symptomatic unruptured intracranial aneurysms (UIA), data on long-term functional outcome are sparse in the literature, even in the light of modern interdisciplinary treatment decisions. We therefore analysed our in-house database for prognostic factors and long-term outcome of neurological symptoms after microsurgical/endovascular treatment. METHODS: Patients treated between 2000 and 2016 after interdisciplinary vascular board decision were included...
June 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28618215/low-density-mechanical-compressible-water-induced-self-recoverable-graphene-aerogels-for-water-treatment
#9
Shibing Ye, Yue Liu, Jiachun Feng
Graphene aerogels (GAs) have demonstrated great promise in water treatment, acting as separation and sorbent materials, due to their high porosity, large surface area, and high hydrophobicity. In this work, we have fabricated a new series of compressible, lightweight (3.3 mg cm-3) GAs through simple cross-linking of graphene oxide (GO) and polyvinyl alcohol (PVA) with glutaraldehyde. It is found that the cross-linked GAs (xGAs) show an interesting water-induced self-recovery ability, which can recover to their original volume even under extremely high compression strain or after vacuum-/air drying...
June 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28611648/complete-recovery-from-blindness-in-case-of-compressive-optic-neuropathy-due-to-unruptured-anterior-cerebral-artery-aneurysm
#10
Yurie Fukiyama, Hidehiro Oku, Yusuke Hashimoto, Yuko Nishikawa, Masahiro Tonari, Jun Sugasawa, Shigeru Miyachi, Tsunehiko Ikeda
It is not common for an isolated visual symptom to be the first indication of an aneurysm compressing the optic nerve. The compression can lead to blindness, and a recovery from the blindness is rare. We report a female with a left painless optic neuropathy caused by an unruptured anterior cerebral artery aneurysm. The patient had a temporal hemianopic visual field defect, which progressed to blindness in the left eye, while the right visual function was not affected. A coil embolization of the aneurysm completely restored her visual acuity to 20/20...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28611224/random-subsets-of-structured-deterministic-frames-have-manova-spectra
#11
Marina Haikin, Ram Zamir, Matan Gavish
We draw a random subset of [Formula: see text] rows from a frame with [Formula: see text] rows (vectors) and [Formula: see text] columns (dimensions), where [Formula: see text] and [Formula: see text] are proportional to [Formula: see text] For a variety of important deterministic equiangular tight frames (ETFs) and tight non-ETFs, we consider the distribution of singular values of the [Formula: see text]-subset matrix. We observe that, for large [Formula: see text], they can be precisely described by a known probability distribution-Wachter's MANOVA (multivariate ANOVA) spectral distribution, a phenomenon that was previously known only for two types of random frames...
June 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28610569/a-novel-tamponade-agent-for-management-of-post-partum-hemorrhage-adaptation-of-the-xstat-mini-sponge-applicator-for-obstetric-use
#12
Maria I Rodriguez, Jeffrey T Jensen, Kenton Gregory, Mary Bullard, Paul Longo, Jerry Heidel, Alison Edelman
BACKGROUND: Although uterine tamponade is an effective treatment for postpartum hemorrhage (PPH), current methods have key limitations in their use, particularly in low resource settings. The XStat™ Mini Sponge Dressing (MSD) is approved for the management of non-compressible wounds in the battlefield/trauma setting. The MSD applies highly compressed medical sponges capable of stopping high-flow arterial bleeding within seconds. The objective of our study was to adopt the MSD for use in managing PPH...
June 13, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28604493/further-standardization-in-the-aneurysm-clip-the-effects-of-occlusal-depth-on-the-outcome-of-spinal-cord-injury-in-rats
#13
Hui Rong, Yue Liu, Zhibin Zhao, Jiying Feng, Rao Sun, Zhengliang Ma, Xiaoping Gu
STUDY DESIGN: Experimental study. OBJECTIVE: To evaluate the relationship between clip occlusal depth and functional and histological outcome measures in a rat model of thoracic spinal cord injury (SCI). SUMMARY OF BACKGROUND DATA: Aneurysm clip compression is a proven model of contusion-compression SCI, but the relationship between clip depth and outcomes in thoracic SCI is unknown. METHODS: A single aneurysm clip was applied to the spinal cord at thoracic vertebra 10 for 1 minute with an occlusal depth of 2, 6, or 10 mm...
June 9, 2017: Spine
https://www.readbyqxmd.com/read/28599533/sound-field-measurement-with-moving-microphones
#14
Fabrice Katzberg, Radoslaw Mazur, Marco Maass, Philipp Koch, Alfred Mertins
Closed-room scenarios are characterized by reverberation, which decreases the performance of applications such as hands-free teleconferencing and multichannel sound reproduction. However, exact knowledge of the sound field inside a volume of interest enables the compensation of room effects and allows for a performance improvement within a wide range of applications. The sampling of sound fields involves the measurement of spatially dependent room impulse responses, where the Nyquist-Shannon sampling theorem applies in the temporal and spatial domains...
May 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28591038/indication-for-hypertrophy-posterior-longitudinal-ligament-removal-in-anterior-decompression-for-cervical-spondylotic-myelopathy
#15
Chengrui Bai, Kanghua Li, Ai Guo, Qi Fei, Dong Li, Jinjun Li, Bingqiang Wang, Yong Yang
The retrospective study aimed to investigate the indication for hypertrophy posterior longitudinal ligament (HPLL) removal in anterior decompression for cervical spondylotic myelopathy (CSM). A total of 138 consecutive patients with CSM were divided into 2 groups with developmental cervical stenosis (DCS) (group S) and non-DCS (group N), according to the Pavlov ratio. These 2 groups were subdivided into 2 further subgroups, according to whether HPLL was removed or preserved: group SR (49 patients) and group SP (32 patients) in group S, group NR (21 patients) and group NP (36 patients) in group N...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28587875/the-effectiveness-of-the-anti-cd11d-treatment-is-reduced-in-rat-models-of-spinal-cord-injury-that-produce-significant-levels-of-intraspinal-hemorrhage
#16
N M Geremia, T Hryciw, F Bao, F Streijger, E Okon, J H T Lee, L C Weaver, G A Dekaban, B K Kwon, A Brown
We have previously reported that administration of a CD11d monoclonal antibody (mAb) improves recovery in a clip-compression model of SCI. In this model the CD11d mAb reduces the infiltration of activated leukocytes into the injured spinal cord (as indicated by reduced intraspinal MPO). However not all anti-inflammatory strategies have reported beneficial results, suggesting that success of the CD11d mAb treatment may depend on the type or severity of the injury. We therefore tested the CD11d mAb treatment in a rat hemi-contusion model of cervical SCI...
June 3, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28584677/microvascular-decompression-for-hypoglossal-nerve-palsy-secondary-to-vertebral-artery-compression-a-case-report-and-review-of-the-literature
#17
Yasuhiro Kuroi, Shigeru Tani, Hidenori Ohbuchi, Hidetoshi Kasuya
BACKGROUND: Neurovascular-compression syndrome (NCS) is described as a prominent pathological contact between cranial nerves and vessels. Trigeminal neuralgia, hemifacial spasm, and glossopharyngeal neuralgia are typical clinical entities associated with NCS. On the other hand, the hyoglossal nerve is rarely affected by NCS. CASE DESCRIPTION: We present a case of hypoglossal nerve palsy (HNP) secondary to vertebral artery (VA) compression. A 47-year-old man presented to our hospital with a 1-month history of dysarthria and dysphagia...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28582275/acute-isolated-paraplegia-revealing-an-ewing-sarcoma-of-the-thoracic-spine
#18
Pierre-Aurélien Beuriat, Sarah Melloul, Louise Galmiche, Irene Cristofori, Michel Zerah, Kevin Beccaria
Ewing sarcoma (ES) infrequently affects the spine. Diagnosis is usually made several weeks following growing symptoms. In this report, we present the case of a child with ES localized at the upper thoracic level. ES was revealed by isolated acute complete paraplegia mimicking medullary stroke. The girl was operated for decompressive laminectomy and tumor removal. Afterwards, she received adjuvant therapy. Subsequently, the child showed a slow improvement of her leg sensitivity associated with a partial motor recovery...
June 2, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28579261/are-axial-intervertebral-disc-biomechanics-determined-by-osmosis
#19
Pieter-Paul A Vergroesen, Kaj S Emanuel, Mirte Peeters, Idsart Kingma, Theodoor H Smit
The intervertebral disc faces high compressive forces during daily activities. Axial compression induces creeping fluid loss and reduction in disc height. With degeneration, disc fluids and height are progressively lost, altering biomechanics. It is assumed that this reduction of fluids is caused by a decline of osmolality within the disc due to proteoglycan depletion. Here we investigate the isolated effect of a reduction in osmosis on the biomechanical properties of the intervertebral disc. Continuous diurnal loading was applied to healthy caprine intervertebral discs in a loaded disc culture system for a total of 6days...
May 8, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28578003/generating-level-dependent-models-of-cervical-and-thoracic-spinal-cord-injury-exploring-the-interplay-of-neuroanatomy-physiology-and-function
#20
Jared T Wilcox, Kajana Satkunendrarajah, Yasmin Nasirzadeh, Alex M Laliberte, Alyssa Lip, David W Cadotte, Warren D Foltz, Michael G Fehlings
The majority of spinal cord injuries (SCI) occur at the cervical level, which results in significant impairment. Neurologic level and severity of injury are primary endpoints in clinical trials; however, how level-specific damages relate to behavioural performance in cervical injury is incompletely understood. We hypothesized that ascending level of injury leads to worsening forelimb performance, and correlates with loss of neural tissue and muscle-specific neuron pools. A direct comparison of multiple models was made with injury realized at the C5, C6, C7 and T7 vertebral levels using clip compression with sham-operated controls...
May 31, 2017: Neurobiology of Disease
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