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Biomedical subjects

H G Schmidt

Publications and source records attributed to H G Schmidt.

85 records · Page 5Linked to original sources
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Syntheses and structures of the arylaluminum chalcogenides (ArAlE)2 (Ar = 2-(NEt2CH2)-6-MeC6H3, E = Se; Ar = 2,6-(NEt2CH2)2C6H3, E = Se, Te).

Two intramolecular stabilized arylaluminum dihydrides, (2-(NEt2CH2)-6-MeC6H3)AlH2 (1) and (2,6-(NEt2CH2)2C6H3)AlH2 (2), were prepared by reducing the corresponding dichlorides with an excess of LiAlH4 in diethyl ether. Reactions of 1 and 2 with elemental selenium afforded the dimeric arylaluminum selenides [(2-(NEt2CH2)-6-MeC6H3)AlSe]2 (3) and [(2,6-(NEt2CH2)2C6H3)AlSe]2 (4). Reaction of 2 with metallic tellurium gave the dimeric arylaluminum telluride [(2,6-(NEt2CH2)2C6H3)AlTe]2 (5). The possible reaction pathway is discussed, and molecular structures determined by single-crystal X-ray analyses are presented for 3 and 5.

Journal Article↗
PubMedDate not supplied

Endoscopic aspects of choledochoceles.

BACKGROUND/AIMS: To date, since so little information has been published on the incidence of choledochoceles, we undertook a retrospective study of the incidence of choledochoceles. MATERIALS AND METHODS: Out of 9,850 patients who had been submitted to ERCP investigation in our department, the medical histories of the patients found to have choledochoceles were analysed. RESULTS: Ten out of the 9,850 had a choledochocele, 3 of which were symptomatic, 3 questionably symptomatic and 4 asymptomatic. In 6 patients with symptomatic or questionably symptomatic choledochoceles, endoscopic treatment in the form of endoscopic papillotomy was carried out. Following this intervention, 4 of the patients became symptom-free. CONCLUSIONS: Smaller choledochoceles tend to be asymptomatic while the larger are symptomatic. The diagnostic method of choice in ERCP.

Adult↗