琼脂

琼脂用途

琼脂是一种含有琼脂糖和琼脂凝胶的果冻状物质。琼脂可以从红藻物种的细胞壁上分离出来,如Gelidium和Gracilaria(Ogonori)。琼脂的凝胶化和熔融是基于氢桥(物理凝胶),因此凝胶化是可逆的。琼脂广泛应用于食品添加剂、植物组织培养、微生物培养基、指纹识别和医学领域[1][2]。

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琼脂名称

[ CAS 号 ]:
9002-18-0

[ 中文名 ]:
琼脂

[ 英文名 ]:
Agar

[中文别名 ]:

[英文别名 ]:

Agar (bacteriological)
EINECS 232-658-1
MFCD00217113
Agar-Agar
Gelose
Agar Agar AGAR

琼脂生物活性

[ 描述 ]:

[ 相关类别 ]:

研究领域 >> 其他

[体外研究]

负载磺胺甲二唑的琼脂珠的制备[3] (1)1.5克琼脂溶于 20毫升水,加热至完全溶解,随后冷却至 70摄氏度左右。 (2) 2克磺胺甲二唑加入 (1) 中悬液,用 3毫升塑料注射器将混合液滴加到含伯吉斯试剂的 100毫升量筒 (量筒浸泡在冰水中)。 (3) 过滤后,珠子室温 (20°C)下真空干燥 24小时

[参考文献]

[1]. Patel J, Soni D, Raol G, et al. Agar-Agar bioplastic synthesis and its characterization[J]. 2019.

[2]. Armisen R, Gaiatas F. Agar[M]//Handbook of hydrocolloids. Woodhead Publishing, 2009: 82-107.

[3]. Nakano M, et al. Sustained release of sulphamethizole from agar beads. J Pharm Pharmacol. 1979 Dec;31(12):869-72.

琼脂物理化学性质

[ 熔点 ]:
85-95 °C

[ 分子式 ]:
C₁₄H₂₄O₉

[ 分子量 ]:
336.33500

[ 精确质量 ]:
336.14200

[ PSA ]:
127.07000

[ 外观性状 ]:
shredded

[ 储存条件 ]:
BELOW +15°C

[ 稳定性 ]:
Stable. Incompatible with strong oxidizing agents.

[ 水溶解性 ]:
H2O: 1.5% with heat | SOLUBLE IN HOT WATER

琼脂MSDS

详细MSDS(安全技术说明书)

琼脂安全信息

[ 个人防护装备 ]:
Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter

[ 危害码 (欧洲) ]:
Xn

[ 风险声明 (欧洲) ]:
22-36/37/38

[ 安全声明 (欧洲) ]:
26-36-24/25

[ 危险品运输编码 ]:
NONH for all modes of transport

[ WGK德国 ]:
2

[ RTECS号 ]:
AW7950000

[ 海关编码 ]:
13023100

琼脂制备

一般从石菜花、江蓠藻、丝藻、小石菜花等红藻类植物中浸提而得。先用水浸泡石菜花以除去杂质，再用硫酸或醋酸在120℃、1MPa和pH值3.5～4.5的条件下浸泡水解，水解液经过滤净化后在15~20℃下冷却凝固成凝胶，再切条于0～10℃下晾干即得条状琼脂。如将琼脂凝胶切条后在-13℃下冻结，并用水调制成6%～7%的胶液，在85℃下喷雾干燥即得粉状琼脂.

1、条状琼脂

2、粉状琼脂

2.用水浸泡石菜花、江蓠藻等红藻类植物以除去杂质，再用硫酸或乙酸在一定条件下浸泡水解，再将水解液经过滤、净化、冷却凝固即得产品。

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琼脂文献

In vitro growth of bioactive nanostructured apatites via agar-gelatin hybrid hydrogel.

J. Biomed. Nanotechnol. 9(12) , 1972-83, (2013)

Biomimetic synthesis of bone-like carbonated apatite with good biocompatibility is a promising strategy for the development of novel biomaterials for bone engineering applications. Most research effor...

Effect of sporulation medium on wet-heat resistance and structure of Alicyclobacillus acidoterrestris DSM 3922-type strain spores and modeling of the inactivation kinetics in apple juice.

Int. J. Food Microbiol. 189 , 82-8, (2014)

Alicyclobacillus acidoterrestris is a spoilage bacterium in fruit juices leading to high economic losses. The present study evaluated the effect of sporulation medium on the thermal inactivation kinet...

Stimulation of neoplastic mouse lung cell proliferation by alveolar macrophage-derived, insulin-like growth factor-1 can be blocked by inhibiting MEK and PI3K activation.

Mol. Cancer 10 , 76, (2011)

Worldwide, lung cancer kills more people than breast, colon and prostate cancer combined. Alterations in macrophage number and function during lung tumorigenesis suggest that these immune effector cel...

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琼脂