The novel heme prosthetic group of Escherichia colt’ NADPH-sulfite reductase (EC 1.8.1.2) has been identified as an iron tetrahydroporphyrin of the isobacteriochlorin type (adjacent pyrrole rings reduced) with eight carboxylic acid side chains. The number of carboxyl groups was established by the following experiments. Esterification with 14CH30H resulted in incorporation of 7.4 moles of 14C pe...

Title of Document: TIN WHISKER RISK ASSESSMENT STUDIES Tong Fang, Doctor of Philosophy, 2005 Directed By: Professor Michael G. Pecht Department of Mechanical Engineering As a result of the global transition to lead (Pb)-free electronics, pure tin and high tin lead-free alloys have been widely adopted by the electronics part manufacturers as the materials of terminal finishes. However, electrica...

Objectives: Searching for testicular intraepithelial neoplasia (TIN; carcinoma in situ) in the contralateral testis of patients with germ cell tumour (GCT) may early disclose contralateral GCT. A single biopsy of the testis is thought to accurately detect TIN. Reports on false-negative biopsies have challenged this view. We investigated whether systematic two-site biopsies are more sensitive th...

In this report, both p- and n-type tin oxide thin-film transistors (TFTs) were simultaneously achieved using single-step deposition of the tin oxide channel layer. The tuning of charge carrier polarity in the tin oxide channel is achieved by selectively depositing a copper oxide capping layer on top of tin oxide, which serves as an oxygen source, providing additional oxygen to form an n-type ti...

background: lead-based radiation shields are widely used in radiology departments to protect both workers and patients from any unnecessary exposure to ionizing radiation. recently there has been a great deal of concern expressed about the toxicity of lead. human lead toxicity is well documented. in that light, production of environmentally-friendly lead-free radiation shields with less weight ...