化学法清洗硅片过程中清除颗粒的机理(英文)

对化学法清洗硅片过程中消除颗粒的机理作了定量的探讨。颗粒的清除是由于化学蚀刻和颗粒与表面排斥力共同作用的结果。首次提出了最浅蚀刻深度和最小蚀刻速度的概念。最浅蚀刻深度可通过颗粒与表面间作用能的关系进行计算。是小蚀刻速度则可通过蚀刻侧形进行计算。研究结果对于优化化学法清洗过程和设计高性能清洗液都具有重要意义。     

Positioning of follicular dendritic cells within the spleen controls prion neuroinvasion

Peripheral infection is the natural route of transmission in most prion diseases. Peripheral prion infection is followed by rapid prion replication in lymphoid organs, neuroinvasion and progressive neurological disease. Both immune cells and nerves are involved in pathogenesis, but the mechanisms of prion transfer from the immune to the nervous system are unknown. Here we show that ablation of the chemokine receptor CXCR5 juxtaposes follicular dendritic cells (FDCs) to major splenic nerves, and accelerates the transfer of intraperitoneally administered prions into the spinal cord. Neuroinvasion velocity correlated exclusively with the relative locations of FDCs and nerves: transfer of CXCR5-/- bone marrow to wild-type mice induced perineural FDCs and enhanced neuroinvasion, whereas reciprocal transfer to CXCR5-/- mice abolished them and restored normal efficiency of neuroinvasion. Suppression of lymphotoxin signalling depleted FDCs, abolished splenic infectivity, and suppressed acceleration of pathogenesis in CXCR5-/- mice. This suggests that prion neuroimmune transition occurs between FDCs and sympathetic nerves, and relative positioning of FDCs and nerves controls the efficiency of peripheral prion infection.     

First record of genus Promalactis Meyrick (Lepidoptera: oecophoridae) from Cambodia with five new species

In this study, species of the genus Promalactis found in Cambodia are reviewed for the first time. Five new species, P. infundibulina sp. nov., P. prolixa sp. nov., P. seimana sp. nov., P. serratiola sp. nov., P. spiraliola sp. nov., are described. Promalactis albisquama Kim and Park is also newly discovered in Cambodia. Illustrations of adults and genitalia of each species are also provided with distributional data.

www.zoobank.org/urn:lsid:zoobank.org:pub:88AF790D-B677-498F-20A5B4-F287B5D52318     

Eight new species of the genus Promalactis (Lepidoptera: Oecophoridae) from Indonesia,with a checklist of the genus

Eight new species of Promalactis were discovered from Indonesia: Promalactis diazomatis sp. nov., Promalactis hamatella sp. nov., Promalactis ingenticula sp. nov., Promalactis laetusella sp. nov., Promalactis latifundus sp. nov., Promalactis minutispina sp. nov., Promalactis mooatana sp. nov. and Promalactis trigonilancis sp. nov. Illustrations of adults and genitalia of the new species and taxonomic information for the six previously known species from Indonesia are provided. A checklist of the genus in Indonesia is given.

www.zoobank.org/urn:lsid:zoobank.org:pub:E25224C7-2D41-4F5A-A4BB-41AA1307E0C0