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与传统光网络相比,光分组交换（OPS）网络具有高速、大吞吐量、低时延和能高效地承载IP业务等突出优点。而作为支撑下一代Internet发展的最有希望的骨干光网络,OPS网与传输控制协议/互联网协议（TCP/IP）的兼容性和支持度是一个值得深入研究的课题。文章以光突发交换（OBS）网为模型,对OPS网络中的TCP传输性能进行了研究。

Copyright of Chinese Medical Equipment Journal is the property of Chinese Medical Equipment Journal Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Central China Normal University is the property of Huazhong Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chinese Institute of Food Science & Technology is the property of Journal of Chinese Institute of Food Science & Technology Periodical Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The spore germination and protonema development of two Fabronia moss species, F. pusilla and F. matsumurae, were observed and described at the micron level by means of indoor artificial cultivation in order to obtain the correlation between spore germination type and phylogeny, ecological selection and reproductive strategy selection of this genus. The results were as follows:(1)The spores of both species germinated outside the wall and produced chloronema twigs that composed of 1-15 semicircular cells;(2)Caulonema cells of F. pusilla were differentiated and formed from the top of chloronema whereas caulonema cells were undifferentiated in F. matsumurae;(3)Gametophyte initial cells of both species were differentiated and formed from chloronema. On the basis of previous studies, in this experiment, referring to Nishida's classification standard for moss spore germination, spore germination of the two Fabronia Raddi moss species were analyzed and determined to be of Maromitrium-type, providing developmental evidence for the systematic classification of this genus. [ABSTRACT FROM AUTHOR]

To investigate the effect of silencing hepatocyte growth factor receptor (c-Met) expression on the biological characteristics of HCT116 colon cancer cells.MethodsCellular model of c-Met transient transfection was established by using small interfering RNA (siRNA), the expression of c-Met in colon cancer cells was detected by real-time fluorescence quantitative polymerase chain reaction (RT-qPCR) and western blot. The apoptosis assay, cell invasion assay, cell migration and other experiments were conducted to observe the effects of silencing c-Met on the biological characteristics of colon cancer cells.ResultsRT-qPCR results showed that the relative expression levels of c-Met mRNA in siRNA-Met group, blank control group and siRNA negative control (siRNA-NC) group were 0.32±0.26, 1.01±0.03 and 1.05±0.23, respectively, and the difference was statistically significant (P<0.05). Western blot analysis showed that the expression level of c-Met protein in the siRNA-Met group was 0.24±0.03, significantly lower than 1.23±0.06 in the blank control group and 1.18±0.11 in the siRNA-NC group (P<0.05). The cell counting kit-8 (CCK8) results showed that the 72-hour absorbance (A) values of the siRNA-Met group, blank control group and the siRNA-NC group were 1.13±0.05, 1.48±0.08 and 1.53±0.07, respectively, and the difference was statistically significant (P<0.01). Cell cycle results showed that the proportion of cells in G2/M phase was (14.65±1.41)% in siRNA-Met group, (5.07±0.70)% in blank control group and (5.63±0.71)% in siRNA-NC group, and the difference was statistically significant (P<0.05). The expression levels of cell cycle regulatory proteins Cdc25c and cyclin B1 in siRNA-Met group were significantly decreased. The apoptotic rate in siRNA-Met group was (5.85±0.35)%, significantly higher than (1.00±0.17)% in blank control group and (0.91±1.14)% in siRNA-NC group (P<0.05). The expression level of apoptosis-related protein Bcl-2 in the siRNA-Met group was significantly decreased while Bcl-2 associated X protein (BAX) expression level was significantly increased. The cell scratching result showed that the cell migration abilities of the siRNA-Met group, blank control group and the siRNA-NC group were (51.33±8.62)%, (100.00±3.72)% and (102.33±6.43)%, respectively, and the difference was statistically significant (P<0.05). The number of cell penetrating into the basement membrane of the siRNA-Met group, blank control group and the siRNA-NC group were 47.50±10.60, 100.00±5.33 and 102.50±10.61, respectively, and the difference was statistically significant (P<0.05). The expressions of invasion related proteins including MMP-2 and MMP-9 in siRNA-Met group were decreased significantly.Conclusionsc-Met plays an important role in maintaining the biological characteristics of colon cancer cells. Inhibition of c-Met may have important values in the treatment of colon cancer. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Medical Equipment Journal is the property of Chinese Medical Equipment Journal Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Medical Equipment Journal is the property of Chinese Medical Equipment Journal Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To fulfill standardized and precision management of medical consumables purchasing. Methods Medical consumables purchasing was executed based on the e-commerce platform in the drug exchange facility, the access process was standardized for medical consumables, and the monitoring and supervision were implemented for price inquiry, purchasing ways, introduction flow of new products, qualification inspecting of suppliers and etc. Results The improved medical consumables purchasing flow based on drug exchange mode contributed to decreasing purchasing cost, avoiding bidding risks as well as precision managements. Conclusion The purchasing based on drug exchange is of great value for hospital medical consumables purchasing management [ABSTRACT FROM AUTHOR]

Objective To establish Pure Cerebral Concussion (PCC) and Multiple Cerebral Concussion (MCC) rats model and observe the changes of pycnosis nerve cells by cell count after injury, so as to understand the additive effect mechanisms of MCC. Methods PCC and MCC model were duplicated by using a metallic pendulum-striker concussive device. 96 female and male Sprague-Dawley rats were randomly divided into twelve groups, namely, 2 d, 4 d, 8 d, 16 d, 24 d groups and MCC1d, 2d, 4d, 8d, 16d, 24d groups, and one control group was used. Each group had eight animals (n＝6) . Each animal was injured and fixed by 4% paraformaldehyde perfused on time. The freezing sections were staining by Hematoxylin and Eosin (HE) and Nissl for microglias cell count in the following areas, namely, PFC, Pir, Cpu, BST, RSA, CA1-4, upper and under dentate gyrus, LD, white matter of brain stem and prerubral region. Result Firstly, the numbers of pycnosis nerve cells in most areas and most test points of both PCC and MCC increased compared with the control group after-injury. Secondly, the quantity of MIG in MCC indicated a more increase compared with PCC in the following areas, namely, PFC, Pir, CPu, BST, RST, CA3, LD and under dentate gyrus( ＜0.05). Conclusion The numbers of pycnosis nerve cells in both PCC and MCC increase after injury and then recover gradually. MCC has the accumulation of damage compared with PCC. [ABSTRACT FROM AUTHOR]