2 research outputs found
Tips-Bundled Pt/Co<sub>3</sub>O<sub>4</sub> Nanowires with Directed Peripheral Growth of Li<sub>2</sub>O<sub>2</sub> as Efficient Binder/Carbon-Free Catalytic Cathode for Lithium–Oxygen Battery
We
propose a new design of a binder/carbon-free air electrode with
tips-bundled Pt/Co<sub>3</sub>O<sub>4</sub> nanowires grown directly
on Ni foam substrate. In this design, the side reactions related to
binder/carbon are excluded. The presence of Pt not only promotes the
formation of the tips-bundled structure of Co<sub>3</sub>O<sub>4</sub> nanowires but also directs the uniform deposition of a fluffy, thin
Li<sub>2</sub>O<sub>2</sub> layer only on the periphery of Pt/Co<sub>3</sub>O<sub>4</sub> nanowires. This crystallization habit of Li<sub>2</sub>O<sub>2</sub> makes it easy to decompose upon recharge with
reduced side reactions. As a result, Li–O<sub>2</sub> batteries
with this cathode show low polarization
Novel β‑Carboline/Hydroxamic Acid Hybrids Targeting Both Histone Deacetylase and DNA Display High Anticancer Activity via Regulation of the p53 Signaling Pathway
A novel
series of hybrids from β-carboline and hydroxamic
acid were designed and synthesized. Several compounds (<b>5m</b>, <b>11b</b>–<b>d</b>, and <b>11h</b>) not
only exerted significant antiproliferation activity against four human
colorectal cancer (CRC) cell lines but also showed histone deacetylase
inhibitory effects in vitro. The most potent compound, <b>11c</b>, exhibited anticancer potency sevenfold higher than that of SAHA. <b>11c</b> triggered more significant cancer cell apoptosis than
did SAHA by cleavage of both PARP and caspase 3 in a dose-dependent
manner. Furthermore, <b>11c</b> simultaneously increased the
acetylation of histone H3 and α-tubulin, enhanced expression
of DNA damage markers histone H2AX phosphorylation and p-p53 (Ser15),
and activated p53 signaling pathway in HCT116 cells. Finally, <b>11c</b> showed low acute toxicity in mice and inhibited the growth
of implanted human CRC in mice more potently than did SAHA. Together, <b>11c</b> possessed potent antitumor activity and may be a promising
candidate for the potential treatment of human CRC