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苏珊·桑塔格的文学观 被引量:1
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作者 付景川 崔玮崧 《学术研究》 CSSCI 北大核心 2018年第4期170-176,共7页
苏珊·桑塔格在美学评论和文学创作方面所取得的成就在一定程度上掩盖了其在文学评论方面所发出的光芒。普罗大众多注意到她的作家、美学评论家和政治活动家身份,却少有人看重她在文学评论方面的建树;学术界多注重她的欧洲文化背景... 苏珊·桑塔格在美学评论和文学创作方面所取得的成就在一定程度上掩盖了其在文学评论方面所发出的光芒。普罗大众多注意到她的作家、美学评论家和政治活动家身份,却少有人看重她在文学评论方面的建树;学术界多注重她的欧洲文化背景,却鲜有人留意她的美国文学批评根基。桑塔格的文学观是深植于反对将二元性应用于所有文学问题之上的。通过对苏珊·桑塔格文论中内容与形式、文学与道德、科学与艺术之间关系的辨析可以理解深植于去二元性土壤下的桑塔格的文学思想。作为一位文学评论家,桑塔格更是指出了艺术门类模糊化和文学内部边界模糊化的现状。面对其他艺术门类的冲击和文学内部文类的重组,桑塔格认为文学仍有其无可撼动的艺术地位和无可取代的欣赏价值。 展开更多
关键词 苏珊·桑塔格 文学观 去二元性 边界模糊化
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Non-phospholipid liposomes with high sterol content display a very limited permeability 被引量:1
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作者 CARBAJAL Gustavo CUI Zhong-Kai LAFLEUR Michel 《Science China Chemistry》 SCIE EI CAS 2013年第1期40-47,共8页
We demonstrate that it is possible to form non-phospholipid fluid bilayers in aqueous milieu with a mixture of palmitic acid (PA),cholesterol (Chol),and cholesterol sulfate (Schol) in a molar proportion of 30/28/42.Th... We demonstrate that it is possible to form non-phospholipid fluid bilayers in aqueous milieu with a mixture of palmitic acid (PA),cholesterol (Chol),and cholesterol sulfate (Schol) in a molar proportion of 30/28/42.These self-assemblies are shown to be bilayers in the liquid ordered phase.They are stable between pH 5 and 9.Over this pH range,the protonation/deprotonation of PA carboxylic group is observed but this change does not appear to alter the stability of these bilayers,a behavior contrasting with that observed for binary mixtures of PA/Chol,and PA/Schol.The multilamellar dispersions formed spontaneously from the PA/Chol/Schol mixture could be successfully extruded to form Large Unilamellar Vesicles (LUVs).These LUVs show interesting permeability properties,linked with their high sterol content.These non-phospholipid liposomes can sustain a pH gradient (pH internal 8/pH external 6) 100 times longer than LUVs made of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) and cholesterol,with a molar ratio of 60/40.Moreover,the non-phospholipid LUVs are shown to protect ascorbic acid from an oxidizing environment (1 mM iron(III)).Once entrapped in liposomes,ascorbic acid displays a degradation rate similar to that obtained in the absence of iron(III).These results show the possibility to form novel nanocontainers from a mixture of a monoalkylated amphiphile and sterols,with a good pH stability and showing interesting permeability properties. 展开更多
关键词 liposomes nanovectors PERMEABILITY pH gradient ascorbic acid
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