(略) 結構多糖甲殼素、 外骨骼的節肢動物 (蜘蛛、 甲殼類動物、 昆蟲等) 與真菌的細胞壁的主要組成部分的結構。它是類似,纖維素,但具有不同側面組對 2 碳的葡萄糖。可這種材料可吸收的手術執行緒。顯示只潛力無窮聚合物的一個小片段。在繪製的它。 甲殼素 多糖 糖 甲殼素
<p>水點一個白色卡通火焰溫度計氣體化學瓶點固定沸點確定 labback 高斯的三腳架的本生燈</p><p><em>水沸點的剪貼畫</em></p> 沸騰 點 水 剪貼畫水的沸點
<p>圖示科學漫畫化學免費實驗室管燒杯實驗室 papapishu 試管 testtube 試管</p><p><em>試管圖示剪貼畫</em></p> 測試 管 圖示 試管圖示剪貼畫
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 科學 化學書佈局
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 實驗室 化學反應
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 科學 液體 設備 化學圖形集
Spreader- Instrument to spread the bacterial culture on plates containing growth media 層流 攤鋪機 細菌 吊具微生物學