Three Undescribed Protoilludane-Type Sesquiterpene Aryl Esters from Armillaria gallica.

Three previously undescribed protoilludane-type sesquiterpene aryl esters, armillanals A-C (1-3), along with seven known ones (4-10) were obtained from Armillaria gallica Marxm. & Romagn. Compounds 1 and 2 were a rare class of sesquiterpenes featuring the Δ and Δ-protoilludane skeleton.

Two new oleanane triterpenes from .

Two new triterpenes mayteneri A (), mayteneri B (), and seven known compounds () were isolated from stems of Loes. The chemical structures of compounds and were established by 1D, 2D NMR, HRESIMS analysis, and calculating electronic circular dichroism (ECD). The structures of known compounds - were determined by comparison of their spectral with those reported.

Preliminary study on phonetic characteristics of patients with pulmonary nodules.

Objective: Pulmonary nodules (PNs) are one of the imaging manifestations of early lung cancer screening, which should receive more attention. Traditional Chinese medicine believes that voice changes occur in patients with pulmonary diseases. The purpose of this study is to explore the differences in phonetic characteristics between patients with PNs and able-bodied persons.

[Research status and development strategies of moxibustion standardization].

Based on the analysis of the present situation of standardization of moxibustion, it is found that the published standards of acupuncture and moxibustion are predominated at acupoint standard and acupuncture manipulation standard. Moxibusiton standardization mainly focuses on the manipulation. It is relatively lack of the standards of moxibustion materials and device.

Unifying description of competing orders in two-dimensional quantum magnets.

Quantum magnets provide the simplest example of strongly interacting quantum matter, yet they continue to resist a comprehensive understanding above one spatial dimension. We explore a promising framework in two dimensions, the Dirac spin liquid (DSL) - quantum electrodynamics (QED) with 4 Dirac fermions coupled to photons. Importantly, its excitations include magnetic monopoles that drive confinement.

Strongly Correlated Metal Built from Sachdev-Ye-Kitaev Models.

Prominent systems like the high-T_{c} cuprates and heavy fermions display intriguing features going beyond the quasiparticle description. The Sachdev-Ye-Kitaev (SYK) model describes a (0+1)D quantum cluster with random all-to-all four-fermion interactions among N fermion modes which becomes exactly solvable as N→∞, exhibiting a zero-dimensional non-Fermi-liquid with emergent conformal symmetry and complete absence of quasiparticles. Here we study a lattice of complex-fermion SYK dots with random intersite quadratic hopping.

Low-Energy Spin Dynamics of the Honeycomb Spin Liquid Beyond the Kitaev Limit.

We investigate the generic features of the low energy dynamical spin structure factor of the Kitaev honeycomb quantum spin liquid perturbed away from its exact soluble limit by generic symmetry-allowed exchange couplings. We find that the spin gap persists in the Kitaev-Heisenberg model, but generally vanishes provided more generic symmetry-allowed interactions exist. We formulate the generic expansion of the spin operator in terms of fractionalized Majorana fermion operators according to the symmetry enriched topological order of the Kitaev spin liquid, described by its projective symmetry group.

Efficient unidirectional launching of surface plasmons by a cascade asymmetric-groove structure.

Increasing the unidirectional launching efficiency of surface plasmon polaritons (SPPs) is crucial in plasmonics. Here, we demonstrate that this efficiency may be improved by cascading subwavelength unidirectional SPP launching units. A unidirectional SPP launching efficiency of at least 46% and an extinction ratio of 40 are experimentally demonstrated using a cascade asymmetric-groove structure.

Quantum Oscillation in Narrow-Gap Topological Insulators.

The canonical understanding of quantum oscillation in metals is challenged by the observation of the de Haas-van Alphen effect in an insulator, SmB_{6} [Tan et al, Science 349, 287 (2015)]. Based on a two-band model with inverted band structure, we show that the periodically narrowing hybridization gap in magnetic fields can induce the oscillation of low-energy density of states in the bulk, which is observable provided that the activation energy is small and comparable to the Landau level spacing. Its temperature dependence strongly deviates from the Lifshitz-Kosevich theory.