Results 71 to 80 of about 1,050 (155)
Studies on Helicoidal Behavior of Cholesteric Liquid Crystals for Aroma-modified Chitosan Derivatives [PDF]
, 2002 摘要：通过对壳聚糖分子进行选择性的化学修饰，制备出可溶解于DMSO、DMF、氯仿、四氢呋喃等常用有机溶剂的含芳基壳聚糖衍生物–––N－邻苯二甲酰化壳聚糖(PhthCS)和N,O－苄基化壳聚糖(N,O-PheCS)。 研究了PhthCS溶致胆甾液晶的热致相转变，发现当浓度超过46％时，体系中胆甾液晶相与凝胶相共存，凝胶化发生在液晶相形成之后。绘制出体系随浓度、温度变化的相图。在此体系中，溶胶–––凝胶相转变温度Tsol-gel和液晶各向同性转变温度Taniso-iso均随浓度的提高（从46％到55 ...
吴玉松
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Veterinary Dermatology, Volume 36, Issue 2, Page 148-158, April 2025.Background – Biofilm production by canine otitis externa (COE) pathogens and resistance development to multiple antimicrobials are commonly reported problems in veterinary practice. The use of adjuvants to disrupt biofilms may be a viable adjunctive therapy.
Bhumika F. Savaliya +3 more
wiley +1 more source
Engaging youth in biodiversity education through visual narrative
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Engaging youth in early and sustained conservation education has important implications for promoting positive attitudes and behaviors in those who will become the future of conservation and management. Toward this goal, visual narratives (comic books, graphic novels) are an increasingly popular method used by conservation scientists to ...
Kyra Ricci +3 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2022 实际震害中孤立型地震发生概率较低，主震发生后大部分伴随多次余震。考虑框架屈服顺序依次为梁翼缘、柱、节点角钢，设计制作3榀半刚性节点PEC柱-型钢梁框架，完成首次低周往复荷载试验，研究其抗震性能。对满足“强节点、弱构件”的KJ-3框架拆除钢梁后的两根PEC柱进行第2次低周往复荷载试验，展开PEC柱在重复地震作用下的抗震性能对比分析。试验结果表明：梁柱节点增设腹板连接角钢时，梁截面充分参与传力，可改善结构整体工作性能。PEC柱在经历重复地震作用时，承载能力有一定程度降低，但强度退化稳定，耗能性能良好 ...
李补拴, 赵冲, 赵根田, 陈明
doaj
Effect of Helix-pin Composite Tissue Flap in the Treatment of Partial Auricle Defect [PDF]
, 2010 目的介绍一种修复外伤性小面积耳郭缺损的手术方法。方法根据外伤性部分耳郭缺损患者的耳郭形态,尤其是耳轮脚明显、耳郭缺损位于耳轮部,面积约2CMx0.8CM以下的外伤后患者,采用耳轮脚复合组织瓣游离移植进行缺损修复。结果本组7例患者,术后伤口一期愈合,缺损修复满意,耳郭外形良好。结论耳轮脚复合组织瓣游离移植,治疗外伤性小面积耳郭缺损,尤其是耳轮部缺损,可取得满意效果。Objective To explore the effect of helix-pin composite tissue flap in ...
侯振清 +4 more
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, 2022 中国传统木结构是世界建筑的瑰宝，其整体抗震性能受构件间榫卯节点力学行为的支配。论文从微观应力-应变关系理论推导、以试验数据为基础拟合模型函数、基于木材嵌压和摩擦机理和数值模拟分析方法四个方面，对中国传统木结构榫卯节点半刚性连接M-θ关系特性的研究成果进行了系统的归纳和总结。
孙 毅 +4 more
core +1 more source
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Conservation scientists work in diverse settings, sometimes requiring them to exist in spaces where they do not feel safe, included, or accepted. This is often the case for the LGBTQIA+ (lesbian, gay, bisexual, transgender, queer, questioning, intersex, asexual, and others) community, which is frequently marginalized in conservation spaces. We
Amy C. Collins +4 more
wiley +1 more source
, 1999 首次报道了苯甲酸壳聚糖的溶致液晶性。苯甲酸壳聚糖能溶于水和１０ 多种有机溶剂中，并在适当浓度时形成液晶相，在一些溶剂中观察到典型的指纹状胆甾相，在二氯乙酸和三氟乙酸中的临界浓度为１８％ （质量）
李志强, 董炎明
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Jianzhu Gangjiegou Jinzhan, 2005 外露式钢柱脚与基础的连接可分为刚接铰接及半刚性连接,它既不是一个简单的刚度概念也不是一个简单的强度概念,尤其是半刚接,如何在设计中准确把握则是设计人员面临的一大课题。本文讨论的是柱脚节点的刚度与强度之间关系及柱脚设计的有关问题。
隋庆海
doaj
, 1999 研究了一种新的甲壳素类高分子液晶－丙酰化甲壳素的液晶性．结果表明这种高分子在二氯乙酸溶液中的织构是带有指纹状微区的交替偏振场织构，可见存在胆甾相．在剪切时能形成典型的条带织构．分子量（从０．６７×１０６到３．４９×１０６）对临界浓度（均为２０ｗｔ％左右）和形成条带织构的最低浓度（均为３４ｗｔ％左右）的影响都不显著 ...
刘晃南 +5 more
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