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Biomedical subjects

M T Wu

Publications and source records attributed to M T Wu.

78 records · Page 5Linked to original sources
PubMedDate not supplied

Quantitative structure-activity relationships and possible mechanisms of action of bispyridinium oximes as antidotes against pinacolyl methylphosphonofluoridate.

The antidotal efficacy of bispyridinium oximes against the poisoning by pinacolyl methylphosphonofluoridate can be correlated well with their physicochemical parameters. Good correlation was observed between the efficacy of antagonism against pinacolyl methylphosphonofluoridate and antinicotinic action of these oximes. X-ray structural analysis showed that these oximes possessed structural similarity to nicotine and acetylcholine of nicotinic conformation. A new model of antidotal action, other than reactivation, against the poisoning by pinacolyl methylphosphonofluoridate was proposed for these bispyridinium oximes through nicotinic receptor binding. The antagonistic efficacy of these antidotes against pinacolyl methylphosphonofluoridate may be attributed to their direct antagonism at nicotinic receptor as well as reactivation of inhibited acetylcholinesterase.

Animals↗
PubMedDate not supplied

Assessment of coke oven emissions exposure among coking workers.

Coking workers are regularly exposed to coke oven emissions, which consist primarily of polycyclic aromatic hydrocarbons and volatile organic compounds. This study measured the workers' exposure to the benzene soluble fraction of total particulates (BSF). The study population consisted of 88 coking workers as an exposure group and 59 referents. Personal breathing-zone samples of BSF and total particulates were taken from all study subjects for 3 consecutive days. The highest BSF concentrations were found among the topside oven workers (geometric mean; range) (microgram/m3): lidman (515; 72-18, 181), tar chaser (432; 51-4334), and larry car operator (185; 55-649). The lowest was 7 micrograms/m3 in the referents. Among the samples at the topside oven 84% exceeded the Occupational Safety and Health Administration standard (150 micrograms/m3 BSF). The percentage of BSF in total particulates varied across job classifications, ranging from 0.3% in wharfmen to 24% in tar chasers. Area sampling indicated that the BSF concentration at the topside area was sixtyfold higher than that at the administrative area, which was approximately 2 km from the coke oven plant.

Air Pollutants, Occupational↗
PubMedDate not supplied

Determination of phosacetim in rabbit tissues and blood by TLC.

A sensitive and rapid method for analysis of phosacetim in rabbit tissues and blood has been developed. It requires extraction from biological materials followed by TLC. The assay allows good reproducibility, high recoveries (about 80%), excellent linearity in the range of 0.1 to 20 micrograms with r equal to 0.999, and a low detection limit, 0.05 microgram. The results from TLC were in conformity with those from HPLC. In addition, the assay was applied to study the distribution of phosacetim in rabbit tissues.

Animals↗
PubMedDate not supplied

Harlequin ichthyosis: report of one case.

Harlequin ichthyosis, or harlequin fetus, is a relatively rare, severe form of congenital ichthyosis. Although the clinical features have been well described, very little is known about the pathogenesis, clinical course, appropriate treatment and prognosis of harlequin ichthyosis because most of these babies with harlequin ichthyosis die within a few weeks of life. We herein report a case of harlequin ichthyosis, which we believe is the first such case in Taiwan.

Female↗