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文章利用Jones矩阵方法计算和分析了双折射率色散效应对一种液晶可调光衰减器（VOA）衰减能力的影响。结果表明,当激光谱线宽度较窄时,双折射率色散效应将导致液晶VOA的光衰减能力大幅度减弱;反之,双折射率色散效应对液晶VOA光衰减能力的影响可以忽略,但液晶VOA本身的光衰减能力很低。因此,液晶VOA适用于较窄线宽的激光光源,在设计和使用时应充分考虑液晶双折射率色散效应对其光衰减能力的影响。

Copyright of Journal of Shanghai Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University 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 Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering 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.)

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Copyright of Chinese Journal of Contemporary Pediatrics is the property of Xiangya Medical Periodical Press 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.)

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急性肺损伤（ALI）是临床上常见的危重症之一。长链非编码RNA（lncRNA）是一类长度超过 200 个核苷 酸的非蛋白质编码 RNA，在染色质形成、转录和转录后翻译等基因表达水平直接或间接参与 ALI 的发生发展。 lncRNA 核富集丰富转录物 1、lncRNA HOX转录反义基因间RNA及 lncRNA 牛磺酸上调1等lncRNA可作为竞争性 内源RNA，与miR-26a-5p、miR-17-5p及miR-34b-5p等微小RNA结合，调节Wnt1诱导的信号通路蛋白1、Rho关联含 卷曲螺旋结合蛋白激酶1蛋白及自噬相关蛋白等下游相关蛋白的表达，参与ALI的发生发展。LncRNA可能通过调 控DNA甲基化、组蛋白修饰，在表观遗传水平参与ALI的发生发展；L通过组装转录激活因子和抑制因子，调节白细 胞介素 6（IL-6）、IL-17、含半胱氨酸的天冬氨酸蛋白水解酶 3/9等蛋白质的转录，在转录水平参与 ALI的发生发展； 与多种RNA结合蛋白相互作用，在转录后水平调控ALI的发生发展。 [ABSTRACT FROM AUTHOR]

Copyright of China Surfactant Detergent & Cosmetics (2097-2806) is the property of China Surfactant Detergent & Cosmetics 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 Pathophysiology is the property of Jinan University, School of Medicine 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.)

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Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics 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.)

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Based on the Compass force field, the adsorption and diffusion characteristics of the noble gases xenon (Xe) and krypton ( Kr) on the flat and rough surfaces of the plastic scintillator (Polyvinyl p - toluene ) were studied by the molecular dynamics (MD) method. The diffusion coefficients of Kr/Xe gases on the surface were obtained from the root mean square displacement ( MSD) of the inert gas adsorption curve. The research results show that Kr/ Xe gases are stably adsorbed on the surface of the plastic scintillator, and in the room temperature range, the higher the temperature, the stronger the stability. The adsorption of Xe molecules is stronger than that of Kr molecules. Kr/ Xe gases have strong diffusion performance, and the diffusion depth increases with the in- creases of temperature and thickness. The diffusion maximum depth is 22. 865 A. The diffusion ability of Kr molecules is stronger than that of Xe molecules, and the rough surface can improve the adsorption and diffusion of two inert gas molecules on the substrate. [ABSTRACT FROM AUTHOR]

Copyright of Control Theory & Applications / Kongzhi Lilun Yu Yinyong is the property of Editorial Department of Control Theory & Applications 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.)

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Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics 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 Contemporary Pediatrics is the property of Xiangya Medical Periodical Press 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 Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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.)

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BACKGROUND: Eco - functional areas play an important role in soil and water conservation and biodiversity conservation. The Wushui River is a watershed located in the Nanling ecological function area. However, study on the content and potential ecological risk of heavy metals in the soil of the upstream area of the watershed is scarce. OBJECTIVES: To investigate the degree of heavy metals pollution and the potential ecological risk of soils in the upper reaches of the Wushui River. METHODS: The soil samples of five land utilization types in the upper reaches of the Wushui River Basin, including mining , industrial , and cultivated land and forest , were collected to analyze the contents of seven heavy metals Cd , As , Cu , Hg , Pb , Ni and Zn in the soil. The Nemerow comprehensive pollution index was used to evaluate the degree of heavy metal pollution , and the Hakanson potential ecological risk index was used to evaluate the potential ecological risk of heavy metals in soil. Principal component analysis was used to investigate the source of heavy metal pollution. RESULTS: The results show that the average concentrations of Cd , As , Cu , Hg , Pb , Ni and Zn in the upper reaches of the Wushui River were 1.28 , 72. 44 , 54. 62 , 0. 27 , 68. 32 , 72. 29 and 158. 42mg/kg , respectively , which higher than the soil background values. The contents of the heavy metals , except mercury in mining land , were higher than those in other types of soils. The single factor pollution index of heavy metals in the mean state show that Cd and As were heavy pollution elements with factors of 5. 07 and 3.25 , respectively. In mining land , the Cd single factor pollution index reached 13. 59. Heavy metal pollution in mining land was the most serious , followed by industrial land. Forest was in a safe state. Potential ecological hazard index evaluation results show that Cd reached a very strong ecological hazard and As was a strong ecological hazard. Mining land reached a strong ecological hazard , industrial land reached a moderate ecological hazard , and other types of soils were slightly ecologically harmful. The results showed that As , Cd , Cu and Zn came from industrial and mining activities , Ni and Hg mainly came from parent materials , and Pb came from transportation. CONCLUSIONS: Heavy metal pollution of soil is relatively serious in the upstream area of the Wushui River Basin. Cd and As are the main risk factors in the area , mainly deriving from mining and industrial activities. [ABSTRACT FROM AUTHOR]

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