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Biomedical subjects

G Urbani

Publications and source records attributed to G Urbani.

At least 55 records · Page 3Linked to original sources
PubMed1979

Inhibition of tyrosinase by indole compounds and reaction products. Protection by albumin.

Tyrosinase activity decreases as the reaction proceeds and is inhibited by L-3,4-dihydroxyphenylalanine oxidation products. Indole and tryptophan inhibit tyrosinase reaction and bovine albumin protects against end-product(s) inhibition or inactivation. Since the same tyrosinase reaction products are indole compounds and some authors reported the binding of indole derivatives with albumin, it is here suggested that indole intermediates of melanin synthesis inhibit or inactivate tyrosinase.

Basidiomycota↗
PubMed1975

[Behavior of glutamic-oxalacetic transaminase in the serum of a group of cholecystopathic patients].

The activity of glutamic-oxalacetic transaminase was studied in the serum of patients suffering from cholelithiasis. Patients were divided into chronic sufferers with jaundice complication and those without jaundice; a similar subdivision was made for patients with acute cholecystitis. The data showed an increase in the frequency of the alteration in enzyme activity in patients suffering from acute forms, probably as a result of the greater incidence of jaundice than is the case with chronic cholelithiasis.

Acute Disease↗
PubMedDate not supplied

[Dehiscence and fenestration: study of distribution and incidence in a homogeneous population model].

Ninety crania of Italian and Austrian males, 25-32 years old, coming from the ossurary of Custoza have been examined, (in all 2205 teeth) to determinate the presence and the frequency of dehiscences and fenestrations. All the crania presenting signs of serious stomatologic pathology have been rejected. Dehiscences are more frequent than fenestrations (7.30% vs 6.98%); dehiscences are more frequent in the mandible than in the maxilla (11.55% vs 1.86%), while fenestrations are more frequent in the upper alveolar arch than in the lower one (13.23% vs 2.10%); the upper right first molar is resulted to be the tooth showing the greatest number of defects (8.13% dehiscences and 49.69% fenestrations).

Alveolar Process↗
PubMedDate not supplied

Unicentric Castleman's lymphadenopathy presenting with Behçet's syndrome: a case report.

We describe a male patient with Behcet's syndrome and Castleman's lymphadenopathy. He was affected by severe oral and genital ulcers, bilateral uveitis, necrotic purulent nodules on both hands. A CT scan of the mediastinum showed the presence of a mediastinal mass. On the basis of histological and immunohistological findings, a diagnosis of Castleman's disease, angiofollicular type, was formulated. The lymphadenopathy was unicentric. After the surgical excision of the mediastinal mass (January, 1989) until now, Behcet's syndrome is in complete remission with a low dosage of prednisone.

Adult↗
PubMedDate not supplied

[Histologic changes in human periodontal tissue after transplantation of teeth with completely formed roots].

Authors present the histological evolution of the periodontal tissues after complete-root teeth transplantation in human. They point out that there is a great distinction between the histological and clinical results. It is difficult to obtain the neoformation of a normal periodontal ligament. In spite of the histological failure, they obtained a good clinical result: there fore the complete-root tooth transplantation must be considered an acceptable surgical procedure.

Adolescent↗
PubMedDate not supplied

[Autotransplantation of human tooth germs].

The Author presents three cases of tooth germ transplantation which were periodically checked by x-rays to show the progressive root development. The clinical result obtained were quite satisfactory. The situations requiring the transplantations in the 3 cases were all rather unusual: in one case the tooth germ was inside a large follicular cyst; in the other two the tooth germs were mesiodistally rotated 90 degrees which made eruption impossible. The cases described differ from cases frequently found in literature in that the transplanted tooth germs were in the initial stage of development; the roots, in fact, had not yet begun to develop. All the tooth germs transplanted, once their growth was completed, presented two types of morphological alternations. A reduction in the volume of the pulpar chamber and a pad of radiopaque tissue around the neck of the tooth. We have attempted to give an explanation for both of these alterations. The cases as well as the surgical procedures are described in detail.

Child↗