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玻璃珠 Glass beads
 产品货号: SG8772
 产品名称: 玻璃珠 Glass beads
 产品价格/规格: 10g 160元/100g1500元
 产品说明书: 点击查看
 更新时间: 2020-09-02
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  • Glass beads, acid-washed

    Cat No:SG8772


    Store at Room Temperature


    直径:425-600 μm (30-40 U.S. sieve)

    Product Description

    Density:  2.5 g/ml
    Refractive index:  1.51-1.52
    Compressive strength (psi average):  36,000
    Poisson’s Ratio (psi):  0.21
    Rigidity Modulus (psi):  4.3 x 106
    Young’s Modulus (psi):  10 x 106
    Hardness (Knoop 100 g load):  515 kg/mm2
    Coefficient of friction (static):  0.9-1.0
    Chemical composition:  soda-lime silica glass
    Softening point (dilatometer):  589 °C
    Expansion Coefficient (25-300 °C):  85 x 107  per °C
    Strain point:  505 °C
    Annealing point:  548 °C
    Dielectric Constant:  1 Kc 7.6 D.C.
    Volume Resistivity (Ohm-cm):  25 °C 6.5 x 1012

    Lost tangent:   1 Kc 2.0% 100 Kc 1.0%.


        A bead size of 0.5 mm is recommended for use in breaking open yeast cells.  A protocol for the use of 0.45 to 0.55 mm acid-washed glass beads from Sigma for cell disruption of yeast cells has been published.


    货号:SG8772

    10g 160元

    100g 1500元

    References
    1. Ausbel, F. M., et al., Short Protocols in Molecular Biology, Greene Pub. Associates and Wiley-Interscience (N. Y. 1995), 3rd ed., 13-51.
    2. Jazwinski, S. M., Preparation of Extracts from Yeast.  Methods in Enzymology, 182, 163 (1990).


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