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Growth and optical microscopy observation of the lysozyme
crystals
Vlokh R., Marsel L., Teslyuk I., Vlokh O.G.
Institute of the Physical Optics, 23 Dragomanov Str.,
79005, L’viv, Ukraine
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The little single lysozyme crystals in the capillary after 15 days of
growth process with average size 0.1´0.1´0.16mm3
were obtained. It was shown that lysozyme crystals are optically anisotropical
and birefringence along a axis is Dn=(2.2±0.5)´10-3
in visible spectrum region. From the measurements of crystallographic angles
follows that on the {001} faces angles equal a=81o,
b=99o.
On the sexangle faces angles equal e=100o,
f=140o
and g=120o. On the base of obtained
results the lysozyme crystal habit is constructed. It was shown that this
habit corresponds to 222-point group of symmetry. Little birefringence
was observed along c axis that means that in crystals small strains exist
that could be connected as with growth remain strains as well as with existing
in the lysozyme crystals ferroelastical phase transition with symmetry
lowering 422®222
doi 10.3116/16091833/2/2/84/2001 |
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References
1. Lemanov VV, 2000. Ferroelectrics 238: 211-213.
2. Ataka M and Asai M, 1994. J.Crystal Growth 90: 86. doi:10.1016/0022-0248(88)90302-8
http://dx.doi.org/10.1016/0022-0248(88)90302-8
3. Howard SB, 1994. J.Crystal Growth 50: 424-426.
4. Cacoippo EJ, 1991. Crystal Growth 114: 286.
doi:10.1016/0022-0248(91)90043-5 http://dx.doi.org/10.1016/0022-0248(91)90043-5
5. Izumi K, Sawamura S, Ataka M, 1996. J.Crystal Growth, 168: 106-111.
doi:10.1016/0022-0248(96)00367-3 http://dx.doi.org/10.1016/0022-0248(96)00367-3
6. Pusey ML, Gernet K, 1994. Acta Cryst. D. 50: 614.
doi:10.1107/S0907444993013344 http://dx.doi.org/10.1107/S0907444993013344
7. Sibille L and Pusey ML, 1994. Acta Cryst. D. 50: 396-399.
doi:10.1107/S0907444993013447 http://dx.doi.org/10.1107/S0907444993013447
8. Forsythe EL, Pusey ML, 1996. J.Crystal Growth 168: 112-117.
doi:10.1016/0022-0248(96)00368-5 http://dx.doi.org/10.1016/0022-0248(96)00368-5 |