Fabrication of a hybrid-cladding tellurite glass fiber doped with Tm3+ and H3+
JOURNAL OF LUMINESCENCE
Authors: Shen, Xiao; Cheng, Guo; Zhang, Liaolin; Wei, Wei
Abstract
To improve the mechanical properties of tellurite glass fiber, a hybrid-cladding optical fiber with Tm3+/Ho3+ codoped TeO2-WO3-La2O3 glass core, tellurite glass inner cladding and phosphate glass outer cladding was proposed and fabricated by rod in tube and twice drawing method in this work. The spectroscopic characteristics of the core glass were systematically investigated too, the results showed that the maximum emission cross section was about 7.91 x 10(-21) cm(2), the longest fluorescence lifetime at 2030 nm was 2.47 ms, the value of sigma(em) x tau rad was 19.53 x 10(-21) cm(2)ms, and the maximum gain coefficient was about 2.02 cm(-1) when 1.2 mol% Tm(3+ )and 0.6 mol% Ho3+ were co-doped in tellurite glass. The hybrid-cladding tellurite glass fiber fabrication process was presented in detail. A single-mode glass fiber with hybrid-cladding was fabricated and NA(1) of the core is 0.116, and NA(2) of the inner cladding is 1.249 and is beneficial for pump light collection. The core diameter of which is 6.8 mu m, and the fiber loss is 20.16 dB/m. The fabricated hybrid cladding glass fibers can be easily cut without obvious defect.
Molecular interactions at the bovine embryo-endometrial epithelium interface
REPRODUCTION
Authors: Sponchiado, Mariana; Marei, Waleed F. A.; Beemster, Gerrit T. S.; Bols, Peter E. J.; Binelli, Mario; Leroy, Jo L. M. R.
Abstract
In cattle, pre-implantation embryo development occurs within the confinement of the uterine lumen. Current understanding of the bi-lateral molecular interactions between embryo and endometrium that are required for a successful pregnancy is limited. We hypothesized that the nature and intensity of reciprocal embryo-endometrium interactions depend on the extent of their physical proximity. Bovine endometrial epithelial cells (bEECs) and morulae were co-cultured in juxtacrine (Contact+) or non-juxtacrine (Contact-) apposition. Co-culture with bEECs improved blastocyst rates on day 7.5, regardless of juxtaposition. Contact+ regulated transcription of 1797 endometrial genes vs only 230 in the Contact- group compared to their control (no embryos) counterparts. A subset of 50 overlapping differentially expressed genes (DEGs) defined embryo-induced effects on bEEC transcriptome irrespective of juxtaposition. Functional analysis revealed pathways associated with interferon signaling and prostanoid biosynthesis. A total of 175 genes displayed a graded expression level depending on Contact+ or Contact-. These genes were involved in interferon-related and antigen presentation pathways. Biological processes enriched exclusively in Contact+ included regulation of cell cycle and sex-steroid biosynthesis. We speculate that, in vivo, embryonic signals fine-tune the function of surrounding cells to ultimately maximize pregnancy success.
COA
Publication 
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