The center of the image represents the hydrogels presented by Michael Malkoch and colleagues for their article on page 3153. The hydrogel network is depicted on a macromolecular scale in the top left. The bottom right shows how cells (human dermal fibroblasts) change morphology and start producing extracellular structures once in contact with the hydrogel. A micrograph of the cells and extracellular excretions serves as the background for the illustration shown. (DOI: 10.1002/pol.20200530).

中文翻译：

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封面图片，第58卷，第22期

图像的中心代表Michael Malkoch及其同事在其第3153页上发表的文章的水凝胶。水凝胶网络以大分子尺度显示在左上方。右下方显示了细胞（人类真皮成纤维细胞）与水凝胶接触后如何改变形态并开始产生细胞外结构。细胞和细胞外排泄物的显微照片用作所示插图的背景。（DOI：10.1002 / pol.20200530）。