Highly a-axis-oriented n- and p-type BaSi2 films were grown on Si(111) substrates by molecular beam epitaxy using Sb and In doping atoms, respectively. The hole concentration of In-doped BaSi2 was controlled in the range between 1016 and 1017 cm-3 at room temperature by changing the temperature of the In Knudsen cell crucible. In contrast, the electron concentration of Sb-doped BaSi2 was controlled in the range between 1016 and 1020 cm-3 by the substrate temperature. The electron and hole mobilities decreased with increasing electron and hole density, respectively.

One hundred forty-seven cases of ovarian endometriosis, encountered from 1976 to 1999 at Tsukuba University Hospital, were studied to clarify the incidence of malignant transformation. There were 18 cases (12.2%) of atypical endometriosis, among which we found a case (5.6%) of ovarian cancer arising from endometriosis not diagnosed before surgery. This is accounted for 0.7% of all ovarian endometriosis cases. Because the incidence was equal to that of the previous reports, it is most likely that the malignant change in ovarian endometriosis occurred in 0.7% of this disease.

Uterine inversion caused by uterine sarcoma is a rare condition with 12 reported cases to date according to a MEDLINE search. We report two cases of this rare condition. A 71- and a 72-year-old woman presented with uterine sarcomas rapidly extruded into the vagina. In both cases, magnetic resonance imaging (MRI) scans showed U-shaped uterine cavities and the pedicles of these tumors were attached to the uterine fundi. Pathological examination confirmed a leiomyosarcoma and a heterologous carcinosarcoma. Uterine inversion can occur when uterine sarcoma rapidly increases in size and extrudes into the vagina. MRI should be performed in the diagnosis of this rare combination.

In Figure 2, the initial rates listed on the ordinate should be 3000-fold smaller, for an absorbance correction. Thus the value of V max in the figure legend and the value of k cat in the discussion of this figure should also be 3000-fold smaller, but the K m is not affected. All the catalyzed rate constants in the tables were from full kinetic plots, not initial rates, and the uncatalyzed rate constants were initial rates with valid absorbance corrections. Thus all the rate constants and ratios listed in the tables, including the catalytic acceleration by a factor of 1 700 000 in Table 5, are correct.We thank Richard Schowen for pointing out this error to us.

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