keyword
MENU ▼
Read by QxMD icon Read
search

Bi polar

keyword
https://www.readbyqxmd.com/read/28646183/differences-in-nature-of-electrical-conductions-among-bi4ti3o12-based-ferroelectric-polycrystalline-ceramics
#1
Changbai Long, Qi Chang, Huiqing Fan
Bismuth titanate Bi4Ti3O12 (BiT), was one of the most promising lead-free high-temperature piezoelectric materials, due to high Curie temperature (675 °C) and large spontaneous polarization (50 µC/cm(2)); however, extensive studies had revealed that high leakage conductivity interferes with the poling process, hindering its practical applications. In this paper, an electrically insulating property was achieved by a low level Nb donor substitution to suppress a high level of holes associated with high oxygen vacancy concentration...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28644505/exceptional-bi-step-switching-of-quadratic-nonlinear-optical-properties-in-a-one-dimensional-channel-compound
#2
Sijie Liu, Zhihua Sun, Chengmin Ji, Lina Li, Sangen Zhao, Junhua Luo
We report a new solid-state nonlinear optical switch based on a one-dimensional channel compound NH4[(CH3)4N]SO4·H2O. It shows an exceptional bi-step switching of second harmonic generation (SHG) effects, corresponding to its SHG-Off, SHG-Low and SHG-High states, which originate from two-step structural transitions with unique centrosymmetric-polar-chiral symmetry transformations.
June 23, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28643832/metasurface-integrated-high-energy-efficient-and-high-linearly-polarized-ingan-gan-light-emitting-diode
#3
Miao Wang, Fuyang Xu, Yu Lin, Bing Cao, Linghua Chen, Chinhua Wang, Jianfeng Wang, Ke Xu
We proposed and demonstrated an integrated high energy efficient and high linearly polarized InGaN/GaN green LED grown on (0001) oriented sapphire with combined metasurface polarizing converter and polarizer system. It is different from those conventional polarized light emissions generated with plasmonic metallic grating in which at least 50% high energy loss occurs inherently due to high reflection of the transverse electric (TE) component of an electric field. A reflecting metasurface, with a two dimensional elliptic metal cylinder array (EMCA) that functions as a half-wave plate, was integrated at the bottom of a LED such that the back-reflected TE component, that is otherwise lost by a dielectric/metal bi-layered wire grids (DMBiWG) polarizer on the top emitting surface of the LED, can be converted to desired transverse magnetic (TM) polarized emission after reflecting from the metasurface...
June 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28643230/crosstalk-between-m2-macrophages-and-glioma-stem-cells
#4
Leora M Nusblat, Molly J Carroll, Charles M Roth
PURPOSE: Given its extremely poor prognosis, there is a pressing need for an improved understanding of the biology of glioblastoma multiforme (GBM), including the roles of tumor subpopulations that may contribute to their growth rate and therapy resistance. The most malignant phenotypes of GBM have been ascribed to the presence of subpopulations of cancer stem cells (CSCs), which are resistant to chemotherapeutic drugs and ionizing radiation and which promote invasiveness and metastasis...
June 22, 2017: Cellular Oncology (Dordrecht)
https://www.readbyqxmd.com/read/28631860/abi2-io3-2f5-a-k-rb-and-cs-combination-of-halide-and-oxide-anionic-units-to-create-large-shg-response-with-wide-bandgap
#5
Xingguo Chen, Hongming Liu, Qi Wu, Xingxing Jiang, Xianggao Meng, Zheshuai Lin, Jingui Qin
A family of nonlinear optical materials that contain the halide, oxide and oxyhalide polar units simultaneously in a single structure, namely, ABi2(IO3)2F5 (A = K, 1;Rb,2 and Cs,3), have been designed and synthesized. They crystallize in the same polar space group of P21 with a two-dimensional double-layered framework constructed by [BiF5]2- and [BiO2F4]5- units connected to each other by four F atoms, in which two [IO3]- groups are linked to [BiO2F4]5- unit on the same side, and a hanging Bi-F bond of [BiF5]2- unit is located on the other side via ionic interaction with the layer-inserted alkali metal ions to form three-dimensional structure...
June 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28626216/therapeutic-effects-of-csf1r-blocking-antibodies-in-multiple-myeloma
#6
Q Wang, Y Lu, R Li, Y Jiang, Y Zheng, J Qian, E Bi, C Zhang, J Hou, S Wang, Q Yi
Our previous studies showed that macrophages (MФs), especially myeloma-associated MФs (MAMs) induce chemoresistance in human myeloma. Here we explored the potential of targeting MФs, by using colony-stimulating factor 1 receptor (CSF1R)-blocking mAbs, to treat myeloma. Our results showed that CSF1R blockade specifically inhibited the differentiation, proliferation and survival of murine M2 MФs and MAMs, and repolarized MAMs towards M1-like MФs in vitro. CSF1R blockade alone inhibited myeloma growth in vivo, by partially depleting MAMs, polarizing MAMs to the M1 phenotype, and inducing a tumor-specific cytotoxic CD4(+) T cell response...
June 19, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28614709/cytoplasmic-dynein-transports-axonal-microtubules-in-a-polarity-sorting-manner
#7
Anand N Rao, Ankita Patil, Mark M Black, Erin M Craig, Kenneth A Myers, Howard T Yeung, Peter W Baas
Axonal microtubules are predominantly organized into a plus-end-out pattern. Here, we tested both experimentally and with computational modeling whether a motor-based polarity-sorting mechanism can explain this microtubule pattern. The posited mechanism centers on cytoplasmic dynein transporting plus-end-out and minus-end-out microtubules into and out of the axon, respectively. When cytoplasmic dynein was acutely inhibited, the bi-directional transport of microtubules in the axon was disrupted in both directions, after which minus-end-out microtubules accumulated in the axon over time...
June 13, 2017: Cell Reports
https://www.readbyqxmd.com/read/28611100/ampk-activation-enhances-the-anti-atherogenic-effects-of-high-density-lipoproteins-in-apoe-mice
#8
Ang Ma, Jing Wang, Liu Yang, Yuanyuan An, Haibo Zhu
HDL plays crucial roles at multiple stages of the pathogenesis of atherosclerosis. AMP-activated protein kinase (AMPK) is a therapeutic candidate for the treatment of cardiovascular disease. However, the effect of AMPK activation on HDL functionality has not been established in vivo. We assessed the effects of pharmacological AMPK activation using A-769662, AICAR, metformin, and IMM-H007 on the atheroprotective functions of HDL in apoE-deficient (apoE-/-) mice fed with a high fat diet. After administration, although there no changes in serum lipid levels among the groups...
June 13, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28608316/winogradskyella-aurantia-sp-nov-isolated-from-a-marine-solar-saltern
#9
Yue Sun, Bi-Yao Chen, Zong-Jun Du
A Gram-stain negative, non-flagellated, facultatively anaerobic, slightly halophilic bacterium, WNB302(T), was isolated from a marine solar saltern in Wendeng, China (122°0'38.85″E, 36°57'56.49″N). Cells of strain WNB302(T) were 0.2-0.7 µm wide and 2.0-10.0 µm long, catalase- positive and oxidase-negative. Colonies were opaque, orange and approximately 1.0-2.0 mm in diameter after culture for 96 h on marine agar 2216. Growth occurs at 15-37 °C (optimum, 33-35 °C), pH 6.0-8.5 (optimum, pH 7.0-7...
June 12, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28604900/monolayer-agbip2se6-an-atomically-thin-ferroelectric-semiconductor-with-out-plane-polarization
#10
Bo Xu, Hui Xiang, Yidong Xia, Kun Jiang, Xiangang Wan, Jun He, Jiang Yin, Zhiguo Liu
Using first-principles calculations, we designed a two-dimensional material, monolayer AgBiP2Se6, with the thickness of only 6 Å, which exhibited out-plane ferroelectricity. The ground state of the monolayer AgBiP2Se6 was not purely ferroelectric since the out-plane ferroelectricity originated from the compensated ferrielectric state: the off-centering antiparallel displacements of Ag(+) and Bi(3+) ions. The compensated ferrielectric ordering has superiority on reducing the depolarization field to stabilize the ferroelectricity...
June 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28586736/mixed-surfactant-systems-of-sucrose-esters-and-lecithin-as-a-synergistic-approach-for-oil-structuring
#11
Mohd Dona Bin Sintang, Sabine Danthine, Ashok R Patel, Tom Rimaux, Davy Van De Walle, Koen Dewettinck
In order to modify the self-assembly of sucrose esters (SEs) in sunflower oil, we added sunflower lecithin (SFL) as co-surfactant. It is hypothesized that SFL modifies the self-assembly of SEs by interrupting the extensive hydrogen bonding between SEs monomers. The addition of SFL into SEs induced gelation of the mixed surfactant system oleogels at all studied ratios. The 7:3 SEs:SFL combination showed enhanced rheological properties compared to the other studied ratios, which suggests better molecular ordering induced by SFL...
May 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28574404/ultrafast-spin-polarized-electron-dynamics-in-the-unoccupied-topological-surface-state-of-bi2se3
#12
D Bugini, F Boschini, H Hedayat, H Yi, C Chen, X Zhou, C Manzoni, C Dallera, G Cerullo, E Carpene
The three-dimensional topological insulator Bi2Se3 presents two cone-like dispersive topological surface states centered at the [Formula: see text] point. One of them is unoccupied in equilibrium conditions and located 1.8 eV above the other one lying close to the Fermi level. In this work we employ time- and angle-resolved photoemission spectroscopy with circularly polarized pump photons to selectively track the spin dynamics of the empty topological states. We observe that spin-polarized electrons flow along the topological cone and recombine towards the unpolarized bulk states on a timescale of few tens of femtoseconds...
June 2, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28537286/strain-effects-on-phonon-transport-in-antimonene-investigated-using-a-first-principles-study
#13
Ai-Xia Zhang, Jiang-Tao Liu, San-Dong Guo, Hui-Chao Li
Strain engineering is a very effective method to continuously tune the electronic, topological, optical and thermoelectric properties of materials. In this work, strain-dependent phonon transport of recently-fabricated antimonene (Sb monolayers) under biaxial strain is investigated using a combination of first-principles calculations and the linearized phonon Boltzmann equation within the single-mode relaxation time approximation (RTA). It is found that the ZA dispersion of antimonene with strain less than -1% gives imaginary frequencies, which suggests that compressive strain can induce structural instability...
June 7, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28537072/enhanced-photocatalytic-activities-of-g-c3n4-via-hybridization-with-a-bi-fe-nb-containing-ferroelectric-pyrochlore
#14
Xiaofeng Yin, Xiaoning Li, Wen Gu, Fangfang Wang, Yijun Zou, Shujie Sun, Zhengping Fu, Yalin Lu
Ferroelectricity may promote photocatalytic performance because the carrier-separation efficiency can be effectively improved by the internal electrostatic field caused by spontaneous polarization. Heterostructures that combine ferroelectric materials with other semiconductor materials can be further advantageous to the photocatalysis process. In this work, Bi1.65Fe1.16Nb1.12O7 was hybridized with g-C3N4 via a facile low-temperature method. The results of high-resolution transmission electron microscopy confirmed that a tight interface was formed between g-C3N4 and Bi1...
June 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534855/rbc-adherence-of-immune-complexes-containing-botulinum-toxin-improves-neutralization-and-macrophage-uptake
#15
Fetweh H Al-Saleem, Rashmi Sharma, Rama Devudu Puligedda, Md Elias, Chandana Devi Kattala, Paul M Simon, Lance L Simpson, Scott K Dessain
In the paralytic disease botulism, the botulinum neurotoxin (BoNT) passes through the bloodstream to reach and inactivate neuromuscular junctions. Monoclonal antibodies (mAbs) may be useful BoNT countermeasures, as mAb combinations can rapidly clear BoNT from the blood circulation. We have previously shown that the BoNT-neutralizing potency of mAbs can be improved through red blood cell (RBC) immunoadherence. For example, a fusion protein (FP) that adheres biotinylated mAbs to the RBC surface enabled a pair of mAbs to neutralize 5000 LD50 BoNT/A in the mouse protection assay...
May 19, 2017: Toxins
https://www.readbyqxmd.com/read/28534208/a-new-eimerian-apicomplexa-eimeriidae-from-southern-short-tailed-shrews-blarina-carolinensis-bachman-soricimorpha-soricidae-soricinae-from-southeastern-oklahoma-usa
#16
Chris T McAllister, R Scott Seville
A new species of Eimeria Schneider, 1875 (Apicomplexa: Eimeriidae) is described from faecal samples of two of three southern short-tailed shrews, Blarina carolinensis (Bachman) (Soricidae) from southeastern Oklahoma, USA. Oöcysts of Eimeria tkachi n. sp. are subspheroidal to ovoidal with a rough-pitted, tan colored, bi-layered wall, measure 16.5 × 15.2 µm, and have a length/width (L/W) ratio of 1.1; both micropyle and oöcyst residuum are absent, but polar granule(s) are present. Sporocysts are ovoidal, 9...
May 22, 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/28530403/propitious-dendritic-cu2o-pt-nanostructured-anodes-for-direct-formic-acid-fuel-cells
#17
Gumaa A El-Nagar, Ahmad M Mohammad, Mohamed S El-Deab, Bahgat E El-Anadouli
This study introduces a novel competent dendritic copper oxide-platinum nanocatalyst (nano-Cu2O-Pt) immobilized onto a glassy carbon (GC) substrate for formic acid (FA) electro-oxidation (FAO); the prime reaction in the anodic compartment of direct formic acid fuel cells (DFAFCs). Interestingly, the proposed catalyst exhibited an outstanding improvement for FAO compared to the traditional platinum nanoparticles (nano-Pt) modified GC (nano-Pt/GC) catalyst. This was evaluated from steering the reaction mechanism toward the desired direct route producing carbon dioxide (CO2); consistently with mitigating the other undesired indirect pathway producing carbon monoxide (CO); the potential poison deteriorating the catalytic activity of typical Pt-based catalysts...
May 31, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28530386/controllable-growth-of-ga-film-electrodeposited-from-aqueous-solution-and-cu-in-ga-se2-solar-cells
#18
Jinlian Bi, Jianping Ao, Qing Gao, Zhaojing Zhang, Guozhong Sun, Qing He, Zhiqiang Zhou, Yun Sun, Yi Zhang
Electrodepositon of Ga film is very challenging due to the high standard reduction potential (-0.53 V vs SHE for Ga(3+)). In this study, Ga film with compact structure was successfully deposited on the Mo/Cu/In substrate by the pulse current electrodeposition (PCE) method using GaCl3 aqueous solution. A high deposition rate of Ga(3+) and H(+) can be achieved by applying a large overpotential induced by high pulse current. In the meanwhile, the concentration polarization induced by cation depletion can be minimized by changing the pulse frequency and duty cycle...
June 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28516140/comprehensive-list-of-metabolites-measured-by-di-fticr-mass-spectrometry-in-thyme-plants-with-contrasting-tolerance-to-drought
#19
Parviz Moradi, Brian Ford-Lloyd, Jeremy Pritchard
This article contains data related to the main research entitled "Metabolomic approach reveals the biochemical mechanisms underlying drought stress tolerance in Thyme" (Moradi et al., 2017) [1]. Two thyme populations with contrasting drought tolerance were subjected to long term water deficit. Leaf samples harvested at the end of stress period and bi-phasic extraction carried out to get polar and non-polar fractions. Extracted samples were analyzed through Direct Infusion FT-ICR mass spectrometry. Date files comprise of four separate tables for all the putatively identified metabolites and their intensities in watered and droughted plants...
June 2017: Data in Brief
https://www.readbyqxmd.com/read/28508425/bimetallic-nickel-substituted-cobalt-borate-nanowire-array-an-earth-abundant-water-oxidation-electrocatalyst-with-superior-activity-and-durability-at-near-neutral-ph
#20
Min Ma, Fengli Qu, Xuqiang Ji, Danni Liu, Shuai Hao, Gu Du, Abdullah M Asiri, Yadong Yao, Liang Chen, Xuping Sun
There is an urgent demand to develop earth-abundant electrocatalysts for efficient and durable water oxidation under mild conditions. A nickel-substituted cobalt-borate nanowire array is developed on carbon cloth (Ni-Co-Bi/CC) via oxidative polarization of NiCo2 S4 nanoarray in potassium borate (K-Bi). As a bimetallic electrocatalyst for water oxidation, such Ni-Co-Bi/CC is superior in catalytic activity and durability in 0.1 m K-Bi (pH: 9.2), with a turnover frequency of 0.33 mol O2 s(-1) at the overpotential of 500 mV and nearly 100% Faradaic efficiency...
May 16, 2017: Small
keyword
keyword
38480
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"