排序方式: 共有4条查询结果,搜索用时 15 毫秒
1
1.
2.
Lu-Yan Wang Wen-Cheng Xu Zhi-Chao Luo Wen-Jun Cao Ai-Ping Luo Jiang-Li Dong Hui-Yi Wang 《Optics Communications》2012,285(8):2113-2117
We demonstrated the experimental observation of the dark pulses with tunable repetition rate from an erbium-doped fiber ring laser. A considerable length of high nonlinear fiber is incorporated into the fiber ring laser to enhance the nonlinear intensity. In our experiment, both bright and dark pulses can be observed under the conditions of appropriately setting of the device in the cavity. Further study showed that the dark pulse is formed due to the cross coupling between two different lasing wavelengths. Particularly, dark pulse-train with multiple repetition rates was observed from the laser cavity and the repetition rate switchable operation can be realized by simply adjusting the polarization controller (PC) in the cavity. The operation of multiple repetition rates of dark pulses was further experimentally investigated and detected as a result of pulse splitting of each component with different wavelength. 相似文献
3.
《中国化学快报》2023,34(8):108125
As a representative of chronic wounds, the long-term high levels of oxidative stress and blood sugar in chronic diabetic wounds lead to serious complications, making them the biggest challenge in the research on wound healing. Many edible natural biomaterials rich in terpenes, phenols, and flavonoids can act as efficient antioxidants. In this study, okra extract was selected as the main component of a wound dressing. The okra extracts obtained via different methods comprehensively maintained the bioactivity of multiple molecules. The robust antioxidant properties of okra significantly reduced intracellular reactive oxygen species production, thereby accelerating the wound healing process. The results showed that okra extracts and their hydrogel dressings increased cell migration, angiogenesis, and re-epithelization of the chronic wound area, considerably promoting wound remodeling in diabetic rats. Therefore, okra-based hydrogels are promising candidates for skin regeneration and wider tissue engineering applications. 相似文献
4.
《Computational and Theoretical Polymer Science》1999,9(2):111-116
Molecular dynamics simulation (NPT ensemble) has been used to obtain specific volume as a function of temperature for four polyphosphazenes. From these results, the volumetric glass transition temperature has been determined as the temperature marking the discontinuity in slope of the V–T simulation data. The molecular mechanics force field used in this study was COMPASS (Condensed-phase Optimized Molecular Potentials for Atomistic Simulation Studies) which has been extensively parameterized and validated for phosphazenes in a previous communication. The polyphosphazenes include poly[bis(2,2,2-trifluoroethoxy)phosphazene] (PTFEP) and three isomers of poly(dibutoxyphosphazene)—poly[bis(n-butoxy)phosphazene] (PnBuP), poly[bis(iso-butoxy)phosphazene)] (PiBuP), and poly[bis(sec-butoxy)phosphazene] (PsBuP). In all cases, there was reasonable agreement between experimental results and values of density and Tg obtained from the simulations. In the case of PnBuP, two different methods for amorphous cell building are compared to explore the relationship between the state of equilibration and the Tg obtained from simulation. 相似文献
1