The Roles of Sulfur-Containing Species in the Selective Catalytic Reduction of NO with NH₃ over Activated Carbon

In the selective catalytic reduction (SCR) of NO with NH₃ over activated carbon (AC), deactivation occurs over time in the presence of SO₂. This work distinguishes the multiple roles of SO₂ in the gas phase versus the solid deposition product and clarifies the effects of the physicochemical properties of AC on NO conversion. The deposition products were detected using temperature-programmed desorption (TPD) coupled with mass spectrum (MS) analysis and Fourier transform infrared (FTIR) spectrometry. The results showed that the activated carbon loses less de-NO_<i>x</i> activity when it has more CO- and CO₂-containing groups with decomposition temperatures over 900 K. The Raman spectra revealed that the disorder of the microcrystalline structure of the graphite has a positive linear correlation with NO conversion regardless of the presence of functional groups. The deposition products were analyzed by Gaussian-Lorentz deconvolution of the TPD spectra, and it was discovered that the sulfur-containing species included sulfate and strongly adsorbed SO₂/SO₃; the NH₃-containing species included NH₄HSO₄ and freely adsorbed NH₃; and the ratios of SO₂/SO₃, NH₄HSO₄ and NH₃ were approximately 31 mol %, 42 mol %, and 26 mol %, respectively. NH₄HSO₄ does not notably inhibit NO conversion, even with a high loading amount. The inhibitory effect of gaseous SO₂ on NO conversion is reversible, and this inhibitory effect is greater than that caused by the loss of functional groups. Increasing the disorder of the microcrystalline structure of the graphite and reducing the gaseous SO₂ were identified as ways to improve activated carbon activity for NO conversion

Additional file 1: of Functional evaluation for patients with lower extremity sarcoma: application of the Chinese version of Musculoskeletal Tumor Society scoring system

MSTS questionnaire in English version. (DOCX 17 kb

Modulating Slow Magnetic Relaxation of Dysprosium Compounds through the Position of Coordinating Nitrate Group

A chain complex [Dy­(<b>L</b>)­(NO₃)₂CH₃OH]_<i>n</i> (<b>1</b>) and a dinuclear compound [Dy₂(<b>L</b>)₂(NO₃)₄(CH₃OH)₂]·2CH₃OH (<b>2</b>) were synthesized by the assembly of a novel pyridine-<i>N</i>-oxide-containing ligand with dysprosium nitrate under different reaction temperatures, where two coordinating nitrates are located in para or ortho position with respect to each other around dysprosium ions. Magnetic studies indicate that the chain complex with two para-coordinating nitrates shows fast quantum tunnelling of the magnetization under zero direct-current field, while the dinuclear complex with two ortho-coordinating nitrates exhibits a thermal-activated process with an effective energy barrier of 51 K. Theoretical and magneto-structural correlation studies indicate that position change of coordinating nitrates can significantly modulate the crystal field around dysprosium ion and further lead to their different relaxation behaviors

Self-Sterilized Flexible Single-Electrode Triboelectric Nanogenerator for Energy Harvesting and Dynamic Force Sensing

Triboelectric nanogenerators (TENGs) offer great opportunities to deploy advanced wearable electronics that integrate a power generator and smart sensor, which eliminates the associated cost and sustainability concerns. Here, an embodiment of such integrated platforms has been presented in a graphene oxide (GO) based single-electrode TENG (S-TENG). The as-designed multifunctional device could not only harvest tiny bits of mechanical energy from ambient movements with a high power density of 3.13 W·m^–2 but also enable detecting dynamic force with an excellent sensitivity of about 388 μA·MPa^–1. Because of the two-dimensional nanostructure and excellent surface properties, the GO-based S-TENG shows sensitive force detection and sound antimicrobial activity in comparison with conventional poly­(tetrafluoroethylene) (PTFE) electrodes. This technology offers great applicability prospects in portable/wearable electronics, micro/nanoelectromechanical devices, and self-powered sensors

Self-Sterilized Flexible Single-Electrode Triboelectric Nanogenerator for Energy Harvesting and Dynamic Force Sensing

Triboelectric nanogenerators (TENGs) offer great opportunities to deploy advanced wearable electronics that integrate a power generator and smart sensor, which eliminates the associated cost and sustainability concerns. Here, an embodiment of such integrated platforms has been presented in a graphene oxide (GO) based single-electrode TENG (S-TENG). The as-designed multifunctional device could not only harvest tiny bits of mechanical energy from ambient movements with a high power density of 3.13 W·m^–2 but also enable detecting dynamic force with an excellent sensitivity of about 388 μA·MPa^–1. Because of the two-dimensional nanostructure and excellent surface properties, the GO-based S-TENG shows sensitive force detection and sound antimicrobial activity in comparison with conventional poly­(tetrafluoroethylene) (PTFE) electrodes. This technology offers great applicability prospects in portable/wearable electronics, micro/nanoelectromechanical devices, and self-powered sensors

Additional file 1: of Quantitative trait loci influencing forking defects in an outbred pedigree of loblolly pine

Genotypes and phenotypes of all progeny, the definitions of the phenotypes, and the linkage map positions of all mapped SNP loci. (XLSX 352 kb

Endohedral Metallofullerene as Molecular High Spin Qubit: Diverse Rabi Cycles in Gd₂@C₇₉N

An anisotropic high-spin qubit with long coherence time could scale the quantum system up. It has been proposed that Grover’s algorithm can be implemented in such systems. Dimetallic aza[80]­fullerenes M₂@C₇₉N (M = Y or Gd) possess an unpaired electron located between two metal ions, offering an opportunity to manipulate spin(s) protected in the cage for quantum information processing. Herein, we report the crystallographic determination of Gd₂@C₇₉N for the first time. This molecular magnet with a collective high-spin ground state (<i>S</i> = 15/2) generated by strong magnetic coupling (<i>J</i>_Gd‑Rad = 350 ± 20 cm^–1) has been unambiguously validated by magnetic susceptibility experiments. Gd₂@C₇₉N has quantum coherence and diverse Rabi cycles, allowing arbitrary superposition state manipulation between each adjacent level. The phase memory time reaches 5 μs at 5 K by dynamic decoupling. This molecule fulfills the requirements of Grover’s searching algorithm proposed by Leuenberger and Loss