Decline
发表于 2025-3-25 04:24:25
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罐里有戒指
发表于 2025-3-25 11:11:28
Chuan-Feng Chen,Ying-Xian Mampanies, and biodiversity for conservationists – have turned environmental governance in Latin America into a highly contested arena. In such a resource-rich region, unequal power relations, conflicting priorities, and trade-offs among multiple goals have led to a myriad of contrasting initiatives t
Brittle
发表于 2025-3-25 15:34:04
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红肿
发表于 2025-3-25 17:34:05
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Demulcent
发表于 2025-3-25 22:14:03
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龙虾
发表于 2025-3-26 02:07:01
Synthesis and Reactions of Other Iptycenes and Their Derivatives In the early 1970s, Huebner et al. (Tetrahedron Lett 359–362, 1970) synthesized the first heptiptycene . with very low and instable yields by the reaction of 11-chloro-9,10-di-hydro-9,10-etheno anthrace 2) with .-butyl lithium at 25 °C. With the help of high-resolution mass spectrum, ultraviolet sp
HAIL
发表于 2025-3-26 05:47:41
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BALK
发表于 2025-3-26 11:04:52
Preparation of Iptycene-Containing Polymers and Oligomersatures and the properties of these polymers and oligomers will also be described in the following corresponding sections. When a 3D structural unit, especially, a rigid 3D skeleton was introduced into a polymer, some special physical properties could be shown. As early as 1968, Klanderm and Faber (J
向外供接触
发表于 2025-3-26 14:57:21
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媒介
发表于 2025-3-26 20:23:23
Iptycenes and Their Derivatives in Material Scienceof completely ordered system. Thus, the systems containing the rigid iptycene core and the flexible long alkyl or alkoxy chains seemed to be potential candidates as liquid crystalline materials (Chem Soc Rev 38:3301–3316, 2009). In the early 1990s, Simon and Norvez (J Chem Soc Chem Commun 1990:3407–