| 1 | Broadband rhenium disulfide optical modulator for solid-state lasers显示文摘Rhenium disulfide(ReS_2), a member of group Ⅶ transition metal dichalcogenides(TMDs), has attracted increasing attention because of its unique distorted 1T structure and electronic and optical properties, which are much different from those of group Ⅵ TMDs(MoS_2, WS_2, MoSe_2, WSe_2, etc.). It has been proved that bulk ReS_2 behaves as a stack of electronically and vibrationally decoupled monolayers, which offers remarkable possibilities to prepare a monolayer ReS_2 facilely and offers a novel platform to study photonic properties of TMDs. However,due to the large and layer-independent bandgap, the nonlinear optical properties of ReS_2 from the visible to midinfrared spectral range have not yet been investigated. Here, the band structure of ReS_2 with the introduction of defects is simulated by the ab initio method, and the results indicate that the bandgap can be reduced from 1.38 to 0.54 eV with the introduction of defects in a suitable range. In the experiment, using a bulk ReS_2 with suitable defects as the raw material, a few-layered broadband ReS_2 saturable absorber(SA) is prepared by the liquid phase exfoliation method. Using the as-prepared ReS_2 SA, passively Q-switched solid-state lasers at wavelengths of 0.64,1.064, and 1.991 μm are investigated systematically. Moreover, with cavity design, a femtosecond passively modelocked laser at 1.06 μm is successfully realized based on the as-prepared ReS_2 SA for the first time. The results present a promising alternative for a rare broadband optical modulator and indicate the potential of ReS_2 in generating Q-switched and mode-locked pulsed lasers. It is further anticipated that this work may be helpful for the design of 2D optoelectronic devices with variable bandgaps. | XIANCUI SU BAITAO ZHANG YIRAN WANG GUANBAI HE GUORU LI NA LIN KEJIAN YANG JINGLIANG HE SHANDE LIU | 2018 | Photonics Research2018，6，6： | 4 |
| 2 | Supplementing daidzein in diets improves the reproductive performance, endocrine hormones and antioxidant capacity of multiparous sows显示文摘Certain hormones play important roles in modulating mammalian reproductive behaviour.Daidzein is a well-known isoflavonic phytoestrogen that possesses oestrogenic activity.This study was conducted to probe the effects of daidzein supplementation in gestation diets on the reproductive performance in sows.A total of 120 multiparous sows(Landrace x Yorkshire)were randomly assigned to 2 groups(n=60)and fed either a base diet(control)or one containing 200 mg/kg daidzein during gestation.We discovered that daidzein supplementation significantly increased the total number of piglets born per litter and number of piglets born alive per litter(P<0.05),decreased the farrowing time(P<0.05)and increased the serum oestrogen and progesterone concentrations(P<0.05)at 35 d of gestation.Moreover,serum immunoglobulin G(IgG)concentration and superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px)activities were higher in the daidzein-treated group than in the control group at35 d of gestation(P<0.05).Daidzein increased the serum SOD activity and total anti-oxidative capacity(T-AOC)at 85 d of gestation(P<0.05).Interestingly,daidzein elevated the expression levels of the sodium-coupled neutral amino acid transporter 1(SLC38 A1)and insulin-like growth factor 1(IGF-1)genes in the placenta(P<0.05).These results suggest that daidzein ingestion could improve sow reproductive performance by changing serum hormones,elevating anti-oxidative capacity and upregulating critical functional genes in the placenta. | Yan Li Guoru He Daiwen Chen Bing Yu Jie Yu Ping Zheng Zhiqing Huang Yuheng Luo Junqiu Luo Xiangbing Mao Hui Yan Jun He | 2021 | Animal Nutrition2021，，4： | 4 |
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