5-Hydr­oxy-1-(3-hydr­oxy-2-naphtho­yl)-3,5-dimethyl-2-pyrazoline

In the title mol­ecule, C16H16N2O3, intra­molecular O—H⋯O hydrogen bonds influence the mol­ecular conformation. Inter­molecular O—H⋯O hydrogen bonds [O⋯O = 2.922 (2) Å] link the mol­ecules into centrosymmetric dimers. Weak inter­molecular C—H⋯O inter­actions assemble these dimers into layers parallel to the bc plane

Crystal structure of the N‐terminal region of human Ash2L shows a winged‐helix motif involved in DNA binding

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/102216/1/embr2011101-sup-0001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/102216/2/embr2011101.reviewer_comments.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/102216/3/embr2011101.pd

Taipu canal as a regional spine: a prototypical approach to territorial planning

Since 2018, the integrated regional development of the Yangtze River Delta has been subjected as a national strategy to intensify the interconnection between its cities. However, the questions of open space conservation and planning have so far remained essentially quantitative and strongly informed by regulatory and top-down principles. Focusing on the vast green heart between Shanghai, Suzhou, and Hangzhou, this design-driven research project hypothesizes that Taipu Canal can be upgraded from its current technical role into a civic spine that frames new developments and articulates the rich diversity of open spaces, ecosystems, historic water towns and villages. The research adopts a crossscale method of “contextual prototypes” that combines sampling, typological classification, and prototypical design explorations in pilot projects. A reflective phase zooms out to critically assess how these prototypical strategies can be systemized as structuring principles at the regional scale. The conclusion of the article discusses how this prototypical approach offers an opportunity to inductively complement the top-down Chinese territorial planning system, which needs to cope with increasingly complex conditions and vaster scales

Few-Layer MXenes Delaminated via High-Energy Mechanical Milling for Enhanced Sodium-Ion Batteries Performance

The global availability of sodium makes the exploration of superior sodium-ion batteries attractive for energy storage application. MXenes, as one of the most promising anodes for sodium-ion batteries, have been reported to have many advantages, such as high electronic conductivity and a hydrophilic surface. However, the compact multilayer structure and deficient delamination significantly inhibits their application, requiring high energy and showing decreased storage capacity and poor rate capabilities. Few-layer MXene has been proved to benefit superior electrochemical properties with a better ionic conductivity and two-dimensional layer structure. Herein, we report scale delamination of few-layer MXene nanosheets as anodes for sodium-ion batteries, which are prepared via an organic solvent assist high-energy mechanical-milling method. This approach efficiently prevents the oxidation of MXene and produces few-layer nanosheets structure, facilitating fast electron transport and Na⁺ diffusion. Electrochemical tests demonstrate that the few-layer MXenes show high specific capacity, excellent cycle stability, and good rate performance. Specifically, few-layer MXene nanosheets deliver a high reversible capacity of 267 mA h g^–1 at a current density of 0.1 A g^–1. After cycling 1500 cycles at a high rate of 1 A g^–1, a reversible capacity of 76 mA h g^–1 could be maintained

Mesoporous Silicon Anodes by Using Polybenzimidazole Derived Pyrrolic N‑Enriched Carbon toward High-Energy Li-Ion Batteries

The silicon anode holds great potential for next-generation lithium-ion batteries in view of its high gravimetric capacity and natural abundance. The main challenges associated with silicon are the structural degradation and instability caused by huge volume change upon cycling. We report herein polybenzimidazole (PBI) derived pyrrolic N-enriched carbon as an ideal encapsulation onto microsized silicon spheres, which is achieved by an aerosol-assisted assembly combined with a simple physisorption process. The new polymer derived carbon endows silicon with the structural and compositional characteristics of intrinsic high electronic conductivity, abundant pyrrolic nitrogen, and structure robustness. The resulting mesoporous Si-PBI carbon composite exhibits excellent lithium storage performance in terms of high reversible specific capacity of 2172 mAh g^–1, superior rate capability (1186 mAh g^–1 at 5 A g^–1), and prolonged cycling life. As a result, a fabricated Si/LiCoO₂ full battery demonstrates high energy density of 367 Wh kg^–1 as well as good cycling stability for 100 cycles

Realizing Reversible Conversion-Alloying of Sb(V) in Polyantimonic Acid for Fast and Durable Lithium- and Potassium-Ion Storage

Finding suitable electrode materials for alkali-metal-ion storage is vital to the next-generation energy-storage technologies. Polyantimonic acid (PAA, H2Sb2O6 · nH2O), having pentavalent antimony species and an interconnected tunnel-like pyrochlore crystal framework, is a promising high-capacity energy-storage material. Fabricating electrochemically reversible PAA electrode materials for alkali-metal-ion storage is a challenge and has never been reported due to the extremely poor intrinsic electronic conductivity of PAA associated with the highest oxidation state Sb(V). Combining nanostructure engineering with a conductive-network construction strategy, here is reported a facile one-pot synthesis protocol for crafting uniform internal-void-containing PAA nano-octahedra in a composite with nitrogen-doped reduced graphene oxide nanosheets (PAA⊂N-RGO), and for the first time, realizing the reversible storage of both Li+ and K+ ions in PAA⊂N-RGO. Such an architecture, as validated by theoretical calculations and ex/in situ experiments, not only fully takes advantage of the large-sized tunnel transport pathways (0.37 nm2) of PAA for fast solid-phase ionic diffusion but also leads to exponentially increased electrical conductivity (3.3 S cm−1 in PAA⊂N-RGO vs 4.8 × 10−10 S cm−1 in bare-PAA) and yields an inside-out buffer function for accommodating volume expansion. Compared to electrochemically irreversible bare-PAA, PAA⊂N-RGO manifests reversible conversion-alloying of Sb(V) toward fast and durable Li+- and K+-ion storage

Mesoporous Silicon Anodes by Using Polybenzimidazole Derived Pyrrolic N‑Enriched Carbon toward High-Energy Li-Ion Batteries

The silicon anode holds great potential for next-generation lithium-ion batteries in view of its high gravimetric capacity and natural abundance. The main challenges associated with silicon are the structural degradation and instability caused by huge volume change upon cycling. We report herein polybenzimidazole (PBI) derived pyrrolic N-enriched carbon as an ideal encapsulation onto microsized silicon spheres, which is achieved by an aerosol-assisted assembly combined with a simple physisorption process. The new polymer derived carbon endows silicon with the structural and compositional characteristics of intrinsic high electronic conductivity, abundant pyrrolic nitrogen, and structure robustness. The resulting mesoporous Si-PBI carbon composite exhibits excellent lithium storage performance in terms of high reversible specific capacity of 2172 mAh g^–1, superior rate capability (1186 mAh g^–1 at 5 A g^–1), and prolonged cycling life. As a result, a fabricated Si/LiCoO₂ full battery demonstrates high energy density of 367 Wh kg^–1 as well as good cycling stability for 100 cycles