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            玻璃珠 Glass beads
             產品貨號: SG8772
             產品名稱: 玻璃珠 Glass beads
             產品價格/規格: 10g 160元/100g1500元
             產品說明書: 點擊查看
             更新時間: 2022-06-07
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            • Glass beads, acid-washed

              Cat No:SG8772


              Store at Room Temperature


              直徑: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.


              貨號: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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