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基于戊二胺的半芳香族耐高温尼龙的合成与表征 被引量:7
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作者 李建伟 朱国富 +7 位作者 王道波 阎昆 钟一平 韩澄光 曹民 姜苏俊 黄险波 张传辉 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2021年第9期23-31,共9页
以生物基戊二胺、己二胺和对苯二甲酸为原料,通过预聚+固相增黏工艺合成耐高温尼龙聚(对苯二甲酰戊二胺-共-己二胺)(PA5T/6T)共聚物。使用低温排水工艺有效抑制了戊二胺脱氨环化副反应,得到高黏度PA5T/6T。相对于传统耐高温尼龙(对苯二... 以生物基戊二胺、己二胺和对苯二甲酸为原料,通过预聚+固相增黏工艺合成耐高温尼龙聚(对苯二甲酰戊二胺-共-己二胺)(PA5T/6T)共聚物。使用低温排水工艺有效抑制了戊二胺脱氨环化副反应,得到高黏度PA5T/6T。相对于传统耐高温尼龙(对苯二甲酰-共-己二酰-己二胺)PA6T/66,生物基耐高温尼龙PA5T/6T具有玻璃化转变温度高(155℃vs.103℃)、热滞留保持率高(77%vs.19%)、力学性能佳和熔接痕强度高等突出优势。 展开更多
关键词 戊二胺 聚(对苯二甲酰戊二胺-共-己二胺) 环化 玻璃化转变温度
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The Clinic Analysis of Diclofenac Suppository for Oocyte Retrieval Analgesia in IVF-ET Cycles
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作者 Yubin Li Qingyun Mai +2 位作者 Tao Li yiping zhong Canquan Zhou 《International Journal of Clinical Medicine》 2013年第8期350-354,共5页
Objective: To study the effect of diclofenac suppository in oocyte retrieval of IVF-ET. Study Design: 1176 patients with informed consents were enrolled into this prospective randomized controlled study. The setting w... Objective: To study the effect of diclofenac suppository in oocyte retrieval of IVF-ET. Study Design: 1176 patients with informed consents were enrolled into this prospective randomized controlled study. The setting was an IVF-ET program at the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China. According to the analgesic drug use, the patients were randomly divided into pethidine group (573 cases) and diclofenac suppository group (603 cases). The data of vital signs, common adverse reactions, severe adverse events and pain degree in oocyte retrieval were collected. The IVF-ET outcomes were also compared. Results: The post-operation pressure and pulse were lower in pethidine group than in diclofenac suppository group (both P0.001).The rest vital signs were not statistically different (all P>0.05). Common adverse reactions in diclofenac suppository group were relative less (all P0.05). Pain degree between the two groups was not statistically different (P=0.304). IVF-ET outcomes were also not statistically different (all P>0.05). There were 3 cases serious abdominal bleeding with shock in the diclofenac suppository group. Conclusion: Using diclofenac suppository in oocyte retrieval analgesic had a good effect. And there was no adverse effect in the IVF-ET outcome. But we should pay close attention to the probability of serious abdominal bleeding. 展开更多
关键词 DICLOFENAC SUPPOSITORY IVF-ET OOCYTE Retrieval ANALGESIA
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抑郁认知易感个体的自我参照加工:来自ERPs的证据 被引量:5
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作者 钟毅平 尹浩楠 +3 位作者 王双红 范伟 占友龙 蔡荣华 《科学通报》 EI CAS CSCD 北大核心 2018年第20期2026-2035,共10页
以往研究表明,抑郁认知易感个体在面对应激事件时罹患抑郁症的风险更大.与抑郁症个体相同的是,抑郁认知易感个体表现出负性注意偏向,然而是否也存在与抑郁症个体相似的自我关注增强,仍未有实证研究给予验证.本研究采用oddball范式来考... 以往研究表明,抑郁认知易感个体在面对应激事件时罹患抑郁症的风险更大.与抑郁症个体相同的是,抑郁认知易感个体表现出负性注意偏向,然而是否也存在与抑郁症个体相似的自我关注增强,仍未有实证研究给予验证.本研究采用oddball范式来考察抑郁认知易感个体自我参照加工及其神经机制.运用事件相关电位技术(ERPs)记录个体对4类不同自我相关名字的加工情况.结果发现,在P2和N2的潜伏期上,抑郁认知易感个体对自我相关名字的注意要早于正常个体;在P2和P3成分上,抑郁认知易感个体诱发的波幅显著小于正常个体;在P3成分上,正常个体出现了自我参照加工程度效应,高自我相关名字诱发的P3波幅显著大于中等相关名字,且中等相关名字诱发的P3波幅显著大于无相关名字;然而在抑郁认知易感个体中,高自我相关名字诱发的P3波幅显著大于低和无相关名字,仅存在自我参照效应.结果表明,与正常个体相比,抑郁认知易感个体自我参照加工的程度效应消失,这可能是由于抑郁认知易感个体的自我概念简单化,更加聚焦核心自我,使得其无法精细区分不同自我相关程度的刺激.该结果可以作为未来对抑郁症早期症状识别的预测指标. 展开更多
关键词 抑郁认知易感 自我参照效应 P2 N2 P3
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