Results 41 to 50 of about 1,584,092 (142)
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Advanced metallic glasses, leveraging their ultrahigh strength, excellent corrosion resistance, superior soft magnetic properties and good biocompatibility, have gradually become indispensable strategic cornerstones in critical fields such as aerospace, electronic information and energy power. This unique combination of properties enables them
Yizhou Liu +11 more
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, 2010 本研究主要是以硝酸銨鈰為起始劑，將醋酸乙烯酯單體接枝到幾丁聚醣分子鏈上而得到接技共聚合體。由實驗結果發現，幾丁聚醣/聚醋酸乙烯酯接枝共聚合體改善了聚醋酸乙烯酯的熱性質及機械性質，增加其吸水度，並提高了幾丁聚醣的熱安定性。將反應完畢之分散相水溶液直接烘乾成膜，會形成顆粒膜，而且顆粒表面富含幾丁聚醣。將此材料應用於銅離子吸附上，其吸附過程呈現兩段行為，銅離子吸附量隨著幾丁聚醣含量增加而增加。將幾丁聚醣/聚醋酸乙烯酯共聚合體醇化後，可得到幾丁聚醣/聚乙烯醇接枝共聚合體。此種材料應用在細胞培養上 ...
邱文英; 金家鳳; 董崇民
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Gongye shui chuli, 2012 以马来酸酐(MA)与氨水为原料热缩聚法合成聚天冬氨酸阻垢剂,分别考察了原料配比、热缩聚温度和热缩聚时间对产物的阻垢性能的影响,得到最佳合成条件:n(MA)∶n(NH3)为1∶2.0,热缩聚温度240℃,热缩聚时间3h。当实验水中Ca2+质量浓度为240mg/L时,聚天冬氨酸阻垢剂的阻垢率达到72%,适用于低矿化度的工业循环冷却水和油田回注水。同时使用L-天冬氨酸对聚合物开环改性,其阻垢率可达到87%。
张尔赤 +5 more
doaj +2 more sources
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Infected bone defects represent a dual therapeutic challenge demanding concurrent infection inhibition and osteogenesis promotion. Systemic antibiotic administration is taken as a classical treatment protocol but often yields inadequate local antibiotic concentrations and delayed bone repair.
Xucai Wang +8 more
wiley +1 more source
Gongye shui chuli, 2019 以铝箔酸洗废液为原料，通过酸溶-碱化-水解熟化工序制备聚合硫酸铁铝（PAFS）。用XRD、SEM对产品结构进行表征，并进行净水实验。实验结果表明，在酸浓度为9 mol/L、n（Fe3+）：n（Al3+）为4：1、反应温度为110℃、反应时间为4.5 h、碱化度0.6、水解温度为70℃、水解时间4 h、熟化温度为50℃、熟化时间8 h的条件下，制备的聚合硫酸铁铝液体产品呈无定型、多晶体矿混合聚合物结构。污水净化结果表明，除浊率与现有聚合硫酸铁（PFS）的效果相当 ...
张骁 +7 more
doaj +2 more sources
Advancing Major Policy Change Analysis in the Advocacy Coalition Framework
Politics &Policy, Volume 54, Issue 4, August 2026.ABSTRACT The Advocacy Coalition Framework (ACF) has been used extensively to study policy processes globally. Existing research, however, fails to sequence the combination of factors that influence policy change. Using theory‐testing process tracing and a within‐case study design focused on Ghana and Nigeria, we address these knowledge gaps by ...
Alex Osei‐Kojo +2 more
wiley +1 more source
Game of Mirrors for Complex Policies: The Narratives on Differentiated Autonomy in Italy
Politics &Policy, Volume 54, Issue 4, August 2026.ABSTRACT This study applies the Narrative Policy Framework (NPF) to a policy of regional devolution of powers. The analysis focuses on differentiated autonomy in Italy, examining the narratives that emerged in the legislative process of the law regulating the procedures for its activation. The context is of particular interest due to the combination of
Gaia Matilde Ripamonti
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Gongye shui chuli, 1999 针对印染废水水质特点，对聚合物的单体浓度、引发剂用量、合成温度、反应时间等因素进行系统实验，确定出适用于处理印染废水中聚合物的最佳合成条件。利用该聚合物处理印染废水，具有较好的效果。
黄国林, 梁平, 刘芬
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Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, Volume 8, Issue 7, Page 2186-2199, July 2026.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
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, 2003 一种酶法制备不同聚合度低聚糖的调控方法，把酶法降解多糖与膜分离相结合，通过选择不同的膜介质及膜的孔径大小，将中空纤维或平板膜超滤器与酶降解反应器相连接，对不同聚合度的低聚糖进行即时分离，超滤液再经纳滤器分离，除掉低活性的单糖、二糖和水等小分子化合物，得到不同聚合度的低聚糖。采用这种技术可生产多种不同系列及不同聚合度的低聚糖，无活性的单糖和二糖生成量低，较高聚合度的多糖可以实现再反应和分离连续操作。由于实现连续操作，酶可重复使用，提高降解酶的使用效率，适合于规模生产 ...
杜昱光 +3 more
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