Su-Yin Tham

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PURPOSE To develop a high-performance liquid chromatography (HPLC) method with photodiode-array ultraviolet detection for the simultaneous determination of vitamin C, vitamin E and beta-carotene. METHODS Following liquid-phase extraction from the human plasma samples, these three vitamins were successfully separated on the LiChrospher 100 RP-18 column(More)
Physostigmine is a major alkaloid found in the seeds of the fabaceous plant Physostigma venenosum. It is a powerful and reversible acetylcholine esterase inhibitor which effectively increases the concentration of acetylcholine at the sites of cholinergic transmission. It exerts its cholinesterase inhibitor effect in both the periphery and central nervous(More)
Seven children were operated on for pronation contractures of the forearm due to obstetric brachial plexus injuries. All underwent extensive preoperative evaluations to determine the extent of injury, secondary deformities, and capacity to perform a few basic tasks. Sequential video studies were used to document these findings. Operative procedures(More)
Twenty-two digits in seven patients with chronic digital vasospasm were surgically treated after failed medical management. All patients complained of severe ischaemic pain. Chronic digital tip ulceration was present in seven digits and dry gangrene in one. Following surgical microarteriolysis all digital ulcers healed completely. Severe digital ischaemic(More)
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