keyword
MENU ▼
Read by QxMD icon Read
search

q angle

keyword
https://www.readbyqxmd.com/read/28213286/investigation-of-silicon-carbon-nitride-nanocomposite-films-as-a-wear-resistant-layer-in-vitro-and-in-vivo-for-joint-replacement-applications
#1
Y Liang, D G Liu, W Q Bai, J P Tu
Silicon-contained CNx nanocomposite films were prepared using the ion beam assisted magnetron sputtering under different nitrogen gas pressure. With increase of the nitrogen pressure, silicon and nitrogen content of the CNx films drastically increase, and is saturated as the PN2 reach about 40%. Surface roughness and the contact angle are increase, while the friction coefficient decreased. The CNx film with 5.7at.% Si content possess the lowest friction coefficient of only 0.07, and exhibited the best tribological properties...
February 10, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28210716/a-nonmonotonic-dependence-of-the-contact-angles-on-the-surface-polarity-for-a-model-solid-surface
#2
Chonghai Qi, Bo Zhou, Chunlei Wang, Yujun Zheng, Haiping Fang
Based on molecular dynamics simulations, we found a nonmonotonic relationship between the contact angle of water droplets and the surface polarity on a solid surface with specific hexagonal charge patterns at room temperature. The contact angle firstly decreases and then increases as polarity (denoted as charge q) increases from 0 e to 1.0 e with a vertex value of q = 0.5 e. We observed a different wetting behavior for a water droplet on a conventional nonwetted solid surface when q ≤ 0.5 e, and a water droplet on an ordered water monolayer adsorbed on a highly polar solid surface when q > 0...
February 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28210029/gender-related-differences-in-lower-limb-alignment-range-of-joint-motion-and-the-incidence-of-sports-injuries-in-japanese-university-athletes
#3
Yasuhiro Mitani
[Purpose] To investigate the gender-related differences in lower limb alignment, range of joint motion, and history of lower limb sports injuries in Japanese university athletes. [Subjects and Methods] The subjects were 224 Japanese university athletes (154 males and 70 females). The quadriceps angle (Q-angle), arch height index, and ranges of internal and external rotation of the hip joints were measured. History of lower limb sports injury was surveyed using a questionnaire. [Results] Females had a significantly higher Q-angle and hip joint internal rotation angle and a significantly lower arch height index than males...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28208440/charge-segregation-in-weakly-ionized-microgels
#4
John S Hyatt, Alison M Douglas, Chris Stanley, Changwoo Do, Thomas H Barker, Alberto Fernández-Nieves
We investigate microgels synthesized from N-isopropylacrylamide (NIPAM) copolymerized with a large mol% of acrylic acid, finding that when the acid groups are partially ionized at high temperatures, competition between ion-induced swelling and hydrophobic deswelling of poly(NIPAM) chains results in microphase separation. In cross-linked microgels, this manifests as a dramatic decrease in the ratio between the radius of gyration and the hydrodynamic radius to ∼0.2, indicating that almost all the mass of the microgel is concentrated near the particle center...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28203025/-trigemino-cardiac-reflex-in-skull-base-surgery
#5
H Z Duan, Y Zhang, L Li, J Y Zhang, Z Q Yi, S D Bao
OBJECTIVE: To explore the mechanism, clinical features, and prognosis of Trigemino-cardiac reflex (TCR) during skull base operations. METHODS: A retrospective analysis was performed on 291 patients with skull base disease from Jan. 2009 to Oct. 2015 in Peking University First Hospital. By reviewing the patients' operative data and anaesthetic electrical record, and we picked out all the patients who suffered from TCR during the operation and analyzed their surgical procedures, clinical features, influence factors, and prognosis...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28198883/angle-resolved-coherent-wave-mixing-using-a-4%C3%A2-%C3%A2-fs-ultra-broad-bandwidth-laser
#6
I P Mercer, T Witting, T Driver, R J Cogdell, J P Marangos, J W G Tisch
We demonstrate angle-resolved coherent (ARC) wave mixing using 4 fs light pulses derived from a laser source that spans 550-1000 nm. We believe this to be the shortest pulse duration used to date in coherent multi-dimensional spectroscopy. The marriage of this ultra-broad band, few-cycle coherent source with the ARC technique will permit new investigations of the interplay between energy transfers and quantum superposition states spanning 8200  cm<sup>-1</sup>. We applied this configuration to measurements on the photosynthetic low light (LL) complex from Rhodopseudomonas palustris in solution at ambient temperature...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28188387/quercetin-induces-protective-autophagy-and-apoptosis-through-er-stress-via-the-p-stat3-bcl-2-axis-in-ovarian-cancer
#7
Y Liu, W Gong, Z Y Yang, X S Zhou, C Gong, T R Zhang, X Wei, D Ma, F Ye, Q L Gao
Quercetin (3,3',4',5,7-pentahydroxyflavone, Qu) is a promising cancer chemo-preventive agent for various cancers because it inhibits disease progression and promotes apoptotic cell death. In our previous study, we demonstrated that Qu could evoke ER stress to enhance drug cytotoxicity in ovarian cancer (OC). However, Qu-induced ER stress in OC is still poorly understood. Here, we demonstrated that Qu evoked ER stress to involve in mitochondria apoptosis pathway via the p-STAT3/Bcl-2 axis in OC cell lines and in primary OC cells...
February 10, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28186797/topologically-entangled-rashba-split-shockley-states-on-the-surface-of-grey-arsenic
#8
Peng Zhang, J-Z Ma, Y Ishida, L-X Zhao, Q-N Xu, B-Q Lv, K Yaji, G-F Chen, H-M Weng, X Dai, Z Fang, X-Q Chen, L Fu, T Qian, H Ding, S Shin
We discover a pair of spin-polarized surface bands on the (111) face of grey arsenic by using angle-resolved photoemission spectroscopy (ARPES). In the occupied side, the pair resembles typical nearly-free-electron Shockley states observed on noble-metal surfaces. However, pump-probe ARPES reveals that the spin-polarized pair traverses the bulk band gap and that the crossing of the pair at Γ[over ¯] is topologically unavoidable. First-principles calculations well reproduce the bands and their nontrivial topology; the calculations also support that the surface states are of Shockley type because they arise from a band inversion caused by crystal field...
January 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28165235/structural-evolution-and-atom-clustering-in-%C3%AE-sialon-%C3%AE-si6-zalzozn8-z
#9
Clayton Cozzan, Kent J Griffith, Geneva Laurita, Jerry G Hu, Clare P Grey, Ram Seshadri
SiAlON ceramics, solid solutions based on the Si3N4 structure, are important, lightweight structural materials with intrinsically high strength, high hardness, and high thermal and chemical stability. Described by the chemical formula β-Si6-zAlzOzN8-z, from a compositional viewpoint, these materials can be regarded as solid solutions between Si3N4 and Al3O3N. A key aspect of the structural evolution with increasing Al and O (z in the formula) is to understand how these elements are distributed on the β-Si3N4 framework...
February 6, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28165026/material-assisted-metamaterial-a-new-dimension-to-create-functional-metamaterial
#10
Wei-Yi Tsai, Chih-Ming Wang, Ching-Fu Chen, Pin Chieh Wu, Yi-Hao Chen, Ting-Yu Chen, Pei Ru Wu, Jia-Wern Chen, Din Ping Tsai
A high Q-value reflective type metasurface consisting of 1D Au nanorods, a SiO2 spacer and a Au back reflector is demonstrated. It is shown that the sideband of the resonant mode can be suppressed as the resonant wavelength close to the phonon absorption of SiO2. By combining both designed structured resonance and inherent property of the based materials, a low angle-dependent metasurface with a Q-value of 40 has been demonstrated. The proposed structure will be useful for high sensitivity sensing and narrow band thermal emitter...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28159972/role-of-id-proteins-in-bmp4-inhibition-of-profibrotic-effects-of-tgf-%C3%AE-2-in-human-tm-cells
#11
Avani A Mody, Robert J Wordinger, Abbot F Clark
Purpose: Increased expression of TGF-β2 in primary open-angle glaucoma (POAG) aqueous humor (AH) and trabecular meshwork (TM) causes deposition of extracellular matrix (ECM) in the TM and elevated IOP. Bone morphogenetic proteins (BMPs) regulate TGF-β2-induced ECM production. The underlying mechanism for BMP4 inhibition of TGF-β2-induced fibrosis remains undetermined. Bone morphogenic protein 4 induces inhibitor of DNA binding proteins (ID1, ID3), which suppress transcription factor activities to regulate gene expression...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28148908/the-treatment-evaluation-for-osteoporotic-kummell-disease-by-modified-posterior-vertebral-column-resection-minimum-of-one-year-follow-up
#12
Da-Long Yang, Si-Dong Yang, Qian Chen, Yong Shen, Wen-Yuan Ding
BACKGROUND The aim of this study was to evaluate the clinical efficacy of modified posterior vertebral column resection (MPVCR) in treating osteoporotic Kummell disease. MATERIAL AND METHODS Between January 2013 and January 2015, 10 patients who were diagnosed with Kummell disease underwent MPVCR treatment, and their medical records were retrospectively collected. Every patient had follow-up for at least one year, with an average of 15 months. Clinical efficacy of MPVCR treatment was evaluated by kyphotic Cobb's angle, Oswestry disability index (ODI) and visual analogue scale (VAS) score...
February 2, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28148662/intra-articular-corrective-osteotomies-combined-with-the-ilizarov-technique-for-the-treatment-of-deformities-of-the-knee
#13
J Xu, Y Jia, Q Kang, Y Chai
AIMS: To present our experience of using a combination of intra-articular osteotomy and external fixation to treat different deformities of the knee. PATIENTS AND METHODS: A total of six patients with a mean age of 26.5 years (15 to 50) with an abnormal hemi-joint line convergence angle (HJLCA) and mechanical axis deviation (MAD) were included. Elevation of a tibial hemiplateau or femoral condylar advancement was performed and limb lengthening with correction of residual deformity using a circular or monolateral Ilizarov frame...
February 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28142189/mesoscopic-structure-of-pectin-in-solution
#14
K Alba, R J Bingham, V Kontogiorgos
Mesoscopic structure of pectin with different molecular characteristics was investigated by means of small angle X-ray scattering (SAXS), electrokinetic measurements and data modelling. The influence of a broad range of pH (2-7) on chain conformation in the dilute and semi-diluted regime was investigated. Scattering data and concomitant analysis revealed two length scales at all environmental conditions studied. pH showed greater influence at acidic values (pH 2.0) enhancing the globular component of the structure due to association of galacturonic acid residues...
January 31, 2017: Biopolymers
https://www.readbyqxmd.com/read/28116949/the-effect-of-in-situ-decompression-on-ulnar-nerve-stability-a-cadaveric-study
#15
B Butler, J Peelman, L-Q Zhang, M Kwasny, D Nagle
Ten fresh frozen right cadaver arms were placed in a motorized jig and an in-situ ulnar nerve decompression was performed in 5 mm increments distally to the flexor carpi ulnaris (FCU) aponeurosis then proximally to the intermuscular septum. The elbows were ranged 0-135° after each incremental decompression and the ulnar nerve to medial epicodyle distance was measured to assess for nerve translation/subluxation compared with baseline (prerelease) values. None of the specimens had ulnar nerve subluxation (defined as anterior translation past the medial epicondyle) even after full decompression...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28108041/strain-elastography-as-a-new-method-for-assessing-pelvic-floor-biomechanics
#16
Jana Marie Kreutzkamp, Sebastian Daniel Schäfer, Susanne Amler, Felix Strube, Ludwig Kiesel, Ralf Schmitz
Strain elastography (SE) is a new technique of parametric imaging that allows quantification of the elasticity of tissue. The aim of our study was to determine if the elasticity of para-urethral tissue correlates with urethral mobility and urinary incontinence (UI). Ninety-nine unselected women were investigated with SE. They were given a standardized interview about UI, and SE raw data for the para-urethral tissue were acquired in a sagittal standard urethra-symphysis view while being stimulated by a coughing fit...
January 17, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28103558/effective-multi-query-expansions-collaborative-deep-networks-for-robust-landmark-retrieval
#17
Yang Wang, Xuemin Lin, Lin Wu, Wenjie Zhang
Given a query photo issued by a user (q-user), the landmark retrieval is to return a set of photos with their landmarks similar to those of the query, while the existing studies on the landmark retrieval focus on exploiting geometries of landmarks for similarity matches between candidate photos and a query photo. We observe that the same landmarks provided by different users over social media community may convey different geometry information depending on the viewpoints and/or angles, and may, subsequently, yield very different results...
March 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28100384/-seasonality-of-clustering-of-fever-and-diarrhea-in-beijing-2009-2015
#18
X T Li, Y W Chen, Z Y He, S Li, Z Y Gao, X He, Q Y Wang
Objective: To understand the seasonal distribution of the clustering of fever and diarrhea. Methods: Concentration degree and circular distribution methods were used to analyze the seasonal distribution of the clustering of fever and diarrhea in Beijing from 2009 to 2015. The information were collected from the Infectious Disease Surveillance Information System of Beijing. Results: The M values of the clustering of fever and diarrhea were 0.57 and 0.47. Circular distribution results showed that the clustering of fever and diarrhea angle dispersion index R values were 0...
January 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28097280/freezing-induced-self-assembly-of-amphiphilic-molecules
#19
P A Albouy, S Deville, A Fulkar, K Hakouk, M Impéror-Clerc, M Klotz, Q Liu, M Marcellini, J Perez
The self-assembly of amphiphilic molecules usually takes place in a liquid phase, near room temperature. Here, using small angle X-ray scattering (SAXS) experiments performed in real time, we show that freezing of aqueous solutions of copolymer amphiphilic molecules can induce self-assembly below 0 °C.
January 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28074088/accurate-optimization-of-amino-acid-form-factors-for-computing-small-angle-x-ray-scattering-intensity-of-atomistic-protein-structures
#20
Dudu Tong, Sichun Yang, Lanyuan Lu
Structure modelling via small-angle X-ray scattering (SAXS) data generally requires intensive computations of scattering intensity from any given biomolecular structure, where the accurate evaluation of SAXS profiles using coarse-grained (CG) methods is vital to improve computational efficiency. To date, most CG SAXS computing methods have been based on a single-bead-per-residue approximation but have neglected structural correlations between amino acids. To improve the accuracy of scattering calculations, accurate CG form factors of amino acids are now derived using a rigorous optimization strategy, termed electron-density matching (EDM), to best fit electron-density distributions of protein structures...
August 1, 2016: Journal of Applied Crystallography
keyword
keyword
65759
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"