(略) 结构多糖甲壳素、 外骨骼的节肢动物 (蜘蛛、 甲壳类动物、 昆虫等) 与真菌的细胞壁的主要组成部分的结构。它是类似,纤维素,但具有不同侧面组对 2 碳的葡萄糖。可这种材料可吸收的手术线程。显示只潜力无穷聚合物的一个小片段。在绘制的它。 甲壳素 多糖 糖 甲壳素
<p>图标科学漫画化学免费实验室管烧杯实验室 papapishu 试管 testtube 试管</p><p><em>试管图标剪贴画</em></p> 测试 管 图标 试管图标剪贴画
Science and education vector footage of chemistry equipment. Images of books with blank covers in different colors and a silver flask with bubbling liquid inside. Free vector graphics for your science, chemistry, education, laboratories, experiments, research, school and knowledge visuals 玻璃 泡沫 科学 化学书布局
Experiments and science vector graphics of a chemical flask. Tall glass vessel with narrow neck and trapezoid body, bubbling liquid inside and round bubbles around the flask. Free vector graphics for chemistry, chemical reactions, experiments, laboratory equipment and research visuals 玻璃 泡沫 实验室 化学反应
Science and research vector footage of chemistry equipment. Images of transparent glass vessels with different shapes, brightly colored liquids inside, flask on a tall metal stand, retort for distillation and a molecule model. Free vectors for your chemistry, experiments and reactions visuals 科学 液体 设备 化学图形集
Spreader- Instrument to spread the bacterial culture on plates containing growth media 层流 摊铺机 细菌 吊具微生物学
The abbreviated structure of the storage polysaccharide starch; just a short segment shown (starch is a long, potentially infinite, polymer of alpha-glucose molecules). Unbranched starch, like the one drawn here, is called amylose. Drawn in Inkscape 生物学 化学 食品 淀粉
A ball-and-stick model structure of acidic (negatively-charged) amino acid glutamic acid (Glu, E). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 酸性 氨基 谷氨酸 (氨基酸)
A ball-and-stick model structure of polar amino acid asparagine (Asn, N). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 氨基 氨基酸 天冬酰胺 (氨基酸)