167,437 research outputs found
Bi-L-RhamBet induces delayed cytotoxicity in A549 cells.
No full textBi-L-RhamBet induces delayed cytotoxicity in A549 cells.</p
Roles of bulk γ(L)-Bi₂MoO₆ and surface β-Bi₂Mo₂O₉ in the selective catalytic oxidation of C₃H₆
No full textγ(L)-Bi₂MoO₆ (L: low temperature phase) catalysts, whose surface compositions have a Mo/Bi ratio above = 0.5, exhibited high selectivity in the partial oxidation of C₃H₆, while catalysts with Mo/Bi surface ratios near or below = 0.5 exhibited low selectivity. γ(L)-phase catalysts which have Mo/Bi surface ratios greater than = 0.5, were demonstrated to form β-Bi₂Mo₂O₉ on their surface. An interaction between the β- and γ(L)-phases was observed in these catalysts’ UV–vis spectra at 430 nm. The new β-phase material seems to grow along b-axis of γ(L)-phase, i.e., perpendicular to MoO₂–Bi₂O₂ layers. Structure visualizations revealed that the α-Bi₂Mo₃O₁₂, β-, and γ(H)-phases, which are selective catalysts, contain twin Mo tetrahedral structures, and that their Mo and Bi ions lie on the same plane. The pure γ(L)-phase does not contain this structure. A model for the very rapid transfer of oxygen between the γ(L)- and β-phases is discussed in relation to the kinetics of C₃H₆ oxidation.ArticleJournal of molecular catalysis. A, Chemical. 318(1-2):94-100 (2010)journal articl
Bi-L-RhamBet induces growth inhibition of healthy and cancer cell lines.
No full textSurvival of human healthy lung cell lines (MRC-5; HEL299), mouse Lewis lung cancer cells (LLC1), and human non-small cell lung cancer cells of different stages including: A549, NCI-H23, NCI-H2087 (stage 1), NCI-H522 (stage 2), NCI-H1993 (stage 3a), and NCI-H1755 (stage 4) all decrease with increased concentrations of Bi-L-RhamBet. The values in parentheses correspond to the concentrations inhibiting fifty percent of the cell growth (IC50). They represent mean values ± standard deviation of triplicates (n = 3) and are representative of three independent experiments.</p
A value for bi-cooperative games
No full textBi-cooperative games were introduced by Bilbao et al. as a generalization of TU cooperative games, in which each player can participate positively, negatively, or not at all. In this paper, we propose a definition of a share of the worth obtained by some players after they decided on their participation in the game. It turns out that the cost allocation rule does not look for a given player to her contribution at the opposite participation option to the one she chooses. The relevance of the value is discussed on several examples.Bi-cooperative games ;Value ;Efficiency
Molecular structure of 28-<i>O</i>-α-l-rhamnopyranosylbetulin 3β-<i>O</i>-α-l-rhamnopyranoside (Bi-L-RhamBet).
No full textMolecular structure of 28-O-α-l-rhamnopyranosylbetulin 3β-O-α-l-rhamnopyranoside (Bi-L-RhamBet).</p
Mitochondrial ROS induced by Bi-L-RhamBet in A549 cells using DHR123.
No full textA549 cells were (A) untreated (CTR); or treated with 5 μM Bi-L-RhamBet (B), 10 μM rotenone (ROT) (C), 5 μM Bi-L-RhamBet + 10 μM ROT (D), 10 mM malonate (MAL) (E), 5 μM Bi-L-RhamBet + 10 mM MAL (F), 10 μM antimycin A (AMA) (G), and 5 μM Bi-L-RhamBet + 10 μM AMA (H). The fluorescence intensity of each image was quantified using Image J software and results are presented as histogram. This analysis is representative of three independent experiments.</p
Spaceborne Bi- and Multistatic SAR: Potential and Challenges
No full textBi- and multistatic synthetic aperture radar (SAR) operates with distinct transmit and receive antennas that are mounted on separate platforms. Such a spatial separation has several operational advantages, which will increase the capability, reliability and flexibility of future SAR missions. Various spaceborne bi- and multistatic SAR configurations are introduced, and their potential for different applications such as frequent monitoring, wide-swath imaging, scene classification, single pass cross-track interferometry and resolution enhancement is compared. Furthermore, some major challenges such as phase and time synchronisation, bi- and multistatic SAR processing, satellite orbit selection and relative position sensing are addressed
A chemically stable electrolyte with a novel sandwiched structure for proton-conducting solid oxide fuel cells (SOFCs)
No full textA chemically stable electrolyte structure was developed for proton-conducting SOFCs by using two layers of stable BaZr0.7Pr 0.1Y0.2O3 -δ to sandwich a highly-conductive but unstable BaCe0.8Y0.2O 3 -δ electrolyte layer. The sandwiched electrolyte structure showed good chemical stability in both CO2 and H2O atmosphere, indicating that the BZPY layers effectively protect the inner BCY electrolyte, while the BCY electrolyte alone decomposed completely under the same conditions. Fuel cell prototypes fabricated with the sandwiched electrolyte achieved a relatively high performance of 185 mW cm- 2 at 700 C, with a high electrolyte film conductivity of 4 × 10- 3 S cm- 1 at 600 C. © 2013 Elsevier B.V
Steam electrolysis by proton-conducting solid oxide electrolysis cells (SOECs) with chemically stable BaZrO3-based electrolytes
No full textBaZrO3-based material was applied as the electrolyte for proton-conducting solid oxide fuel cells (SOECs). Compared with the instability of BaCeO3-based proton-conductors, BaZrO3-based material could be a more promising candidate for proton-conducting SOECs due to its excellent chemical stability under H2O conditions, but few reports on this aspect has been made due to the processing difficulty for BaZrO3. Our recent pioneering work has demonstrated the feasibility of using BaZrO3-based electrolyte for SOECs and the fabricated cell achieves relatively high cell performance, which is comparable or even higher than that for BaCeO3-based SOECs and offers better chemical stability. Cell performance can be further improved by tailoring the electrolyte and electrode
On bi-skew braces and brace blocks
No full textL. N. Childs defined a bi-skew brace to be a skew brace such that if we swap the role of the two operations, then we find again a skew brace. In this paper, we give a systematic analysis of bi-skew braces. We study nilpotency and solubility, and connections between bi-skew braces and set-theoretic solutions of the Yang–Baxter equation. Further, we deal with Byott's conjecture in the case of bi-skew braces, and we use bi-skew braces as a tool to solve a classification problem proposed by L. Vendramin. In the final part, we investigate brace blocks, defined by A. Koch to be families of group operations on a given set such that any two of them yield a bi-skew brace. We provide a characterisation of brace blocks, illustrate how all known constructions in literature follow in a natural way from our characterisation, and give several new examples
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