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Biomedical subjects

L S Li

Publications and source records attributed to L S Li.

At least 109 records · Page 6Linked to original sources
PubMedDate not supplied

Preliminary electron crystallographic analysis of ice-embedded tropomyosin crystals.

Electron images and diffraction patterns of ice-embedded tropomyosin crystalline sheets have been recorded at 100 and 400 kV. Optical diffractograms from the images indicated an elongated, centered unit cell with a = 799.2 +/- 10.6 A, b = 55.1 +/- 3.5 A. Evaluation of the phases in the computed Fourier transforms up to 7 A resolution revealed the presence of symmetry axes consistent with two-dimensional space group cmm. Electron diffraction patterns show diffuse arcs and discrete sampling at a resolution of 5.1 A, arising from the alpha-helical coiled-coil features of the molecule. These results demonstrate that tropomyosin thin sheets are highly ordered and suggest that retrieval of its high-resolution three-dimensional structure may be feasible by electron crystallography.

Animals↗
PubMedDate not supplied

Knowledge of stroke in Hong Kong Chinese.

A random telephone survey on knowledge of stroke was conducted in 1, 238 Hong Kong Chinese. Most respondents realized that effective treatment was available, that stroke was preventable and that it could be fatal or disabling. Sudden unilateral limb weakness, sudden speech and language disturbances, and sudden vertigo and clumsiness were better recognized than other warning symptoms of stroke. A slightly better recognition of symptoms of stroke was seen in those with a belief of knowing about stroke, providing a correct description of stroke, those with a positive household history of stroke and those with a better knowledge of potential risk factors. Most respondents would choose desirable actions if stroke was suspected in their family members or themselves. Friends and relatives, newspapers and magazines, and mass media provided the major sources of their knowledge.

Adolescent↗