By numerically studying the acoustic radiation forces on particle above the phononic crystal slabs (PCS), we show that a guided resonant mode of PCS yields a resonantly-enhanced, stably trapped acoustic radiation force on the particle. These trapping patterns and acoustic radiation force dependent on the wavelength, particle size, and particle material are investigated, respectively. It is shown that tuning the wavelength of incident acoustic wave may thus allow the formation and reconfiguration of patterns. We expect that this system may thus allow to realize self-assembly particles.
Resveratrol has been implicated in the differentiation and development of human umbilical cord mesenchymal stem cells. The differentiation of into esophageal fibroblasts is a promising strategy for esophageal tissue engineering. However, the pharmacological effect and underlying mechanism of resveratrol on human umbilical cord mesenchymal stem cells differentiation are unknown. Here, we investigated the effects and mechanism of resveratrol on the differentiation of human umbilical cord mesenchymal stem cells.
Endophytic fungi are a rich source of novel organic compounds with interesting biological activities and a high level of biodiversity. A total of 76 endophytic fungus strains were isolated from 13 species of plants. Through a preliminary screening and fermentation assay, a fungi named ML-GEN.1 isolated from Strobilanthes cusia was found and the lipid content reached 59%. This is the first report of oleaginous microorganism which is isolated from S. cusia. ML-GEN.1 was identified as Fusarium sp.ML-GEN.1 through morphological and molecular methods. Similar to vegetable oils, the fatty acid composition of lipid from Fusarium sp. ML-GEN.1 contained oleic acid (41.66%), palmitic acid (23.26%), linoleic acid (19.18%), and the unsaturated fatty acids amounted to about 61%. In waste molasses fermentation, Fusarium sp. ML-GEN.1 accumulated lipid to 29% of biomass when various sugars in waste molasses were utilized as the carbon source. The biomass was 22.8 g/L, which was much higher than the original value (12.7 g/L). Key words: Oleaginous endophytic fungi, biodiesel, waste molasses.
Acentric compounds with a layered structure are of current interest owing to their advanced functional properties for technical applications. However, the growth of bulk single crystals of acentric materials with a quasi-two-dimensional structure is challenging, which severely hinders the intrinsic properties investigation and optoelectronic applications of these materials. Herein, we report the controlled growth of bulk CdTeMoO6 single crystals with a layered structure and the investigation of their linear and nonlinear optical properties. High quality CdTeMoO6 single crystals with dimensions of ∼26 × 10 × 9 mm3 were successfully grown through the modified top-seeded solution growth method using TeO2-MoO3 as a flux. The transparent range of CdTeMoO6 single crystals is in the range of 0.345–5.40 μm, and with large birefringence (Δn = no – ne = 0.2868–0.2219 from 514 nm to 1.5467 μm). In addition, the nonlinear optical (NLO) coefficient d36 of CdTeMoO6 single crystals was measured to be 8.5 pm/V using Maker Fringe techniques. We also found CdTeMoO6 is type-I phase-matchable based on the calculated phase-matching curves. Our results indicated that CdTeMoO6 single crystal is an excellent birefringent material combined with a promising NLO material for optoelectronic applications.
Intense interests in mid-infrared (MIR) nonlinear optical (NLO) crystals have erupted in recent years due to the development of optoelectronic applications ranging from remote monitoring to molecular spectroscopy. Here, two polar crystals Ca3(TeO3)2(MO4) (M = Mo, W) were grown from TeO2-MO3 flux by high-temperature solution methods. Ca3(TeO3)2(MoO4) and Ca3(TeO3)2(WO4) are isostructural, which feature novel structures consisting of asymmetric MO4 tetrahedra and TeO3 trigonal pyramids. Optical characterizations show that both crystals display ultrawide transparency ranges (279 nm to 5.78 μm and 290 nm to 5.62 μm), especially high optical transmittance over 80% in the important atmospheric transparent window of 3-5 μm, and superhigh laser damage thresholds (1.63 GW/cm2 and 1.50 GW/cm2), 54.3 and 50 times larger than that of state-of-the-art MIR NLO AgGaS2, respectively. Notably, they exhibit the widest band gaps and the loftiest laser-induced threshold damages among the reported tellurates so far. Moreover, Ca3(TeO3)2(MO4) exhibit type I phase matching at two working wavelengths owing to their large birefringence and strong second-harmonic generation responses from the distorted anions, as further elucidated by the first-principles calculations. The above characteristics indicate that Ca3(TeO3)2(MO4) crystals are high-performance MIR NLO materials, especially applying in high-power MIR laser operations.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
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