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Merck
CN

56763

琼脂

high purity, low ionic content, low gel strenght, suitable for microbiology

别名:

洋菜，琼胶, 琼脂-琼脂, 胶琼脂

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关于此项目

线性分子式:
(C12H18O9)n
化学文摘社编号:
9002-18-0
UNSPSC Code:
41106212
NACRES:
NA.85
EC Number:
232-658-1
MDL number:
MFCD00081288

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SMILES string

O1[C@@H]([C@@H]([C@@H]([C@H](C1OC2[C@H]3OCC2OC([C@H]3O)C)O)OC)O)CO

InChI key

GYYDPBCUIJTIBM-DYOGSRDZSA-N

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

sterility

non-sterile

form

powder

shelf life

limited shelf life, expiry date on the label

ign. residue

≤4.0%

loss

≤10% loss on drying

turbidity

≤8 NTU (after autoclaving)

mp

85-95 °C

transition temp

gel point 34-36 °C

gel strength

≥800 g/cm2

anion traces

sulfate (SO42-): ≤2.75%

cation traces

Ca: ≤500 mg/kg, Mg: ≤200 mg/kg

application(s)

microbiology

Quality Level

200

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General description

琼脂具有高纯度、低离子含量和低凝胶强度，作为微生物培养基的凝固剂被广泛应用于微生物学。它是从海藻中提取的多糖，主要由琼脂糖组成。琼脂基本上是一种惰性物质，这使它成为微生物培养基的理想材料，因为它不会干扰微生物的生长。琼脂可以固化培养基，使微生物在固体环境中生长，促进不同菌落的形成，并可以选择性地分离特定的微生物。琼脂还用于制备选择性和鉴别性培养基，这些培养基可以提供额外的营养物质或其他化学物质，以选择性地促进或抑制特定微生物的生长。琼脂通过高压灭菌法灭菌，然后倒入培养皿冷却和固化，形成微生物生长的表面。

Application

琼脂通常用作许多微生物培养基的凝固剂，用于各种制药、环境、食品和饮料样品中的细菌、酵母和霉菌的生长和鉴定。

Analysis Note

毒性物质：无

存储类别

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

法规信息

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历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
BCCN9721
BCCJ3606
BCCD5385
BCCB4264

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Arnaud Dechesne et al.
Applied and environmental microbiology, 74(16), 5195-5200 (2008-07-01)
Water is arguably the most important constituent of microbial microhabitats due to its control of physical and physiological processes critical to microbial activity. In natural environments, bacteria often live on unsaturated surfaces, in thin (micrometric) liquid films. Nevertheless, no experimental
Timothy A Wencewicz et al.
Journal of medicinal chemistry, 56(10), 4044-4052 (2013-04-26)
Chemical syntheses and biological evaluation of biscatecholate-monohydroxamate mixed ligand sideromycins utilizing the carbacephalosporin β-lactam antibiotic loracarbef and the fluoroquinolone antibiotic ciprofloxacin are described. The mixed ligand β-lactam sideromycin (1b) had remarkably selective and extremely potent antibacterial activity against the Gram-negative
Takeshi Moriwaki et al.
Journal of medical engineering & technology, 37(2), 96-101 (2013-01-31)
To expand the performance capacity of the scanning haptic microscope (SHM) beyond surface mapping microscopy of elastic modulus or topography, surface density mapping of a natural tissue was performed by applying a measurement theory of SHM, in which a frequency
Extracellular bioluminescence of mycelium metabolites of the luminous mushroom Panellus stipticus (IBSO-2301) growing on an Agar medium.
A P Puzyr et al.
Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections, 448, 39-40 (2013-03-13)
E Reyssat et al.
Physical review letters, 109(24), 244301-244301 (2013-02-02)
A soft solid is more easily sliced using a combination of normal and shearing deformations rather than diced by squeezing down on it normally with the same knife. To explain why this is so, we experimentally probe the slicing and
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Base Ingredients of Microbiology Media

Culture media provides a habitat with suitable nutrients, energy sources, and certain environmental conditions for the growth of microorganisms. The components of the culture media range from simple sugars to peptones, salts, antibiotics, and complex indicators.

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