生物来源
algae (Rhodophyceae)
质量水平
形式
flakes
powder or crystals
技术
tissue culture: suitable
灰分
2.0-4.5%
凝胶强度
600-1200 g/cm2 (1.5%, 20 oC)
InChI
1S/C14H24O9/c1-5-8(16)13-11(7(21-5)4-20-13)23-14-10(18)12(19-2)9(17)6(3-15)22-14/h5-18H,3-4H2,1-2H3/t5?,6-,7?,8-,9+,10-,11?,12+,13+,14?/m1/s1
InChI key
GYYDPBCUIJTIBM-DYOGSRDZSA-N
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一般描述
琼脂是由β- D-吡喃半乳糖基和3,6-脱水-α-L-吡喃半乳糖基单元组成的多糖。根据不同的来源，琼脂以甲基和硫酸醚等各种取代形式存在。它是从类红藻藻类的细胞壁中分离出来的线性半乳聚糖。
应用
琼脂已用于：
- 用作固体N6完全培养基组分
- 改良Murashige和Skoog (MS)培养基，用于培养发芽的扁豆和蚕豆种子转基因花椰菜和西兰花外植体再生
- 用作琼脂混合物组分，以模拟颈动脉中的血管体模
生化/生理作用
琼脂以左旋构象存在，六角形纤维聚集导致形成凝胶。二糖的疏水性决定了其胶凝特性和溶解性。琼脂是微生物固体培养基的主要成分。它在组织工程、制药和细胞封装中均有应用。
WGK
WGK 1
个人防护装备
Eyeshields, Gloves, type N95 (US)
Niranjan Khadka et al.
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Physical and chemical characterization of agar polysaccharides extracted from the Thai and Japanese species of Gracilaria
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Chemical structure and physico-chemical properties of agar
International Workshop on Gelidium, 21(11), 137-148 (1991)
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Puddephat IJ, et al.
Molecular breeding : new strategies in plant improvement, 7(3), 229-242 (2001)
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