Endotoxin Removal after Root Surface Debridement with Gracey Curretes and Vector^TM-system

Objective: To estimate the presence and the quantity of endotoxin of periodontally involved root surfaces after root surface debridement.Methods: Ninety single rooted teeth with severe bone resorption were selected,which were scheduled for extraction.The teeth were randomly assigned into 3 groups.The teeth in the first group were served as control and they did not receive any debridement.The teeth in the second group were scaled and root planned with Gracey curettes.The teeth in the third group were debrided with the new ultrasonic device VectorTM-system(Dürr Dental).The endotoxin concentrations before and after debridement were assessed by Limulus Amebocyte Lysat(LAL).Results: The concentration of endotoxin of periodontally involved teeth in the control group was 0.825 EU/ml.Scaling and root planning resulted in a significant reduction of the values as follows: Gracey curettes 0.240 EU/ml,VectorTM-system 0.184 EU/ml.Conclusion: Scaling and root planning leads to obvious reduction of the endotoxin on periodontally involved root surfaces and VectorTM-system is comparatively more effective than Gracey curettes.

System Position and Divergent Time of Based on ITS Sequence <i>Humulus scandens</i>

This article mainly studied Humulus scandens’ ITS sequence, its system position and its divergent time. ITS is 624 bp with a GC percentage content of 57.21%. It only has the variation in 585 (C changes T), systematic position in Humulus lupulus (GenBank: EF136401) and Humulus scandens (GenBank: FJ980285), Humulus lupulus (GenBank: DQ005990), with Humulus scandens (GenBank: FJ980285), Humulus lupulus (GenBank: DQ005990) has the near sibship. Humulus in Moraceae family system position between Cudrania tricuspidata and Artocarpeae, support the Cannabiodeae promotion for Cannabinaceae. The divergent time of Humulus is 70.88 mya in Moraceae, Humulus scandens and Humulus lupulus (GenBank: EF136401) is 12.78 mya, with Humulus scandens (GenBank: FJ980285), Humulus lupulus (GenBank: DQ005990) is 1.10 mya. In the Moraceae branch’s molecular systematics research, the suitable choice is to choose Humulus scandens as Moraceae’s outgroup.

新型冠状病毒肺炎诊治——阿司匹林和维生素C

病毒感染激活cGAS-STING信号通路,诱导包括干扰素在内的一系列细胞因子表达增加的抗病毒反应。如果抗病毒效应未能有效抑制病毒复制并清除病毒,靶细胞大量破坏叠加细胞因子级联反应,大量白细胞聚集,正常肺泡组织将被病毒和严重的炎症反应所破坏。初步尸检病理证实肺泡、支气管上皮细胞及间质结构破坏和炎症反应。在没有有效抗病毒药物情况下早期抗病毒免疫和抗氧化应激是阻止病情进展的主要措施。阿司匹林在阻断cGAS-STING-细胞因子分泌起重要作用。高剂量维生素C在肺部重症感染治疗中可减轻氧化应激和促进修复,降低死亡率和缩短ICU住院时间。推荐临床早期干预。

Ti-Al合金γ/α_2界面结构及拉伸变形行为的分子动力学模拟

采用分子动力学方法,通过考察共格和半共格界面,发现体系总能量随两相厚度比变化,得到2种界面相互转变的临界片层厚度;对不同片层厚度的Ti-Al合金进行垂直界面的拉伸加载,发现共格界面的屈服强度高于半共格界面,断裂行为随γ和α_2相的厚度比变化。塑性变形首先发生在γ相一侧,形成Shockley偏位错,进而通过剪切传递方式穿过γ/α_2界面,激活a2相的锥面层错;γ/α_2界面为后续的位错和孪生提供形核点。

Interfacing photonics with artificial intelligence:an innovative design strategy for photonic structures and devices based on artificial neural networks

Over the past decades,photonics has transformed many areas in both fundamental research and practical applications.In particular,we can manipulate light in a desired and prescribed manner by rationally designed subwavelength structures.However,constructing complex photonic structures and devices is still a time-consuming process,even for experienced researchers.As a subset of artificial intelligence,artificial neural networks serve as one potential solution to bypass the complicated design process,enabling us to directly predict the optical responses of photonic structures or perform the inverse design with high efficiency and accuracy.In this review,we will introduce several commonly used neural networks and highlight their applications in the design process of various optical structures and devices,particularly those in recent experimental works.We will also comment on the future directions to inspire researchers from different disciplines to collectively advance this emerging research field.

Distributed Fiber Birefringence Measurement Using Pulse-CompressionФ-OTDR

In this paper,a novel birefringence measurement method through the Rayleigh backscattered lightwave within single-mode fiber is proposed,using a single chirped-pulse with arbitrary state of polarization.Numerical analysis is carried out in detail,then pulse-compression phase-sensitive optical time domain reflectometry(PC-O-OTDR)with polarization-diverse coherent detection is employed to verify this method.A 2 km spun single-mode fiber is tested with 8.6cm spatial resolution,and the average birefringence of the fiber under test is measured as 0.234rad/m,which is consistent with previous literatures about single-mode fiber.Moreover,the relationship between the measured birefringence and the spatial resolution is also studied for the first time,and the results show that spatial resolution is crucial for fiber birefringence measurement.

用于模式分析的图像嵌入

用于模式分析的图像嵌入广泛应用于统计学、机器学习、图像处理、计算机视觉等。近年来，图像嵌入模式识别受到学术界和工业界机器学习领域的专家和研究人员越来越多地关注。本书介绍图像嵌入理论、计算和应用的最新进展，如非线性流形图、线性化方法、基于图形子空间分析、超图、无向图，各章均为读者提供了相关个案研究，给出了实验与应用数据。

Erratum to: Distributed Fiber Birefringence Measurement Using Pulse-Compression Ф-OTDR

Erratum to:Distributed Fiber Birefringence Measurement Using Pulse-Compression Ф-OTDR The original article unfortunately contained a mistake.Figures 4 and 8 are not clear.The figures in original article and in corrected article are as follows.