Orb‐weaver spiders of the family Araneidae produce a viscous glue from aggregate glands. Spiders effectively capture prey by coating the viscous glue onto the spiral lines. The viscous glue has an unusual property. The main components are glycoproteins, salts (low molecular mass compounds [LMMCs] and inorganic salt), and water. The interaction of water and glycoproteins relies on the presence of salts. Here, we used a freeze method to analyze the behavior of water of the viscous glue using time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS). We found that the matrix effect of glycoprotein may cause ion suppression of water in aggregate glue droplets. Moreover, the changes in element distribution before and after the viscous glue adheres to the object suggest that after losing salts, water not only ceases to interact with glycoproteins but also oozes with the salts.

中文翻译：

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用TOF‐SIMS分析蜘蛛球网的聚集胶滴中的水

Araneidae科的天体织布蜘蛛从聚集体中产生粘性胶。蜘蛛通过将粘性胶粘剂涂在螺旋线上有效地捕获猎物。粘性胶水具有非同寻常的性能。主要成分是糖蛋白，盐（低分子量化合物[LMMC]和无机盐）和水。水和糖蛋白的相互作用取决于盐的存在。在这里，我们使用冷冻法通过飞行时间二次离子质谱（TOF-SIMS）分析了粘性胶水的行为。我们发现糖蛋白的基质效应可能导致聚集胶滴中水的离子抑制。而且，粘性胶粘剂粘附到物体上之前和之后元素分布的变化表明，失去盐分后，水不仅会停止与糖蛋白的相互作用，还会与盐分渗出。