We report a study of the magnetic properties of transition-metal doped Zn1−xTMxO (TM=Mn, Co, Fe). Polycrystalline powder samples were synthesized by both solid-state and liquid-phase reactions. From the Curie–Weiss behavior of susceptibility at high temperatures, it was found that the TM–TM interaction is dominated by antiferromagnetic coupling with effective nearest-neighbor exchange constants J=−90 to −30 K. The magnetization data measured at low temperature as a function field H are fit to a parameterized Brillouin function to obtain the effective concentration xeff of magnetically active TM2+ ions. As x increases, the fraction of magnetically active ions, xeff/x, decreases. This is ascribed to an increase in average AF interaction between doped magnetic spins as the average distance between them decreases with an increase in x.

These data indicate that the OS regimen is effective and well tolerated in patients with advanced colorectal cancer.

The accuracy of PET/CT is low and it is not a useful tool in the staging of gastric cancer overall in early gastric cancer and in signet-ring-cell carcinoma. Furthermore, the sensitivity of PET/CT could be inferior to that of CECT in the diagnosis of regional lymph node metastasis.

Background:Since its reemergence in 1993, a number of cases of Plasmodium vivax malaria have been reported in Korea. We analyzed the cases of malaria patients living in Chuncheon and its neighboring communities, to characterize its clinical manifestations and laboratory findings, and to identify any differences between our clinical findings and those of previous studies.Methods:We reviewed the clinical records of cases that were confirmed as malaria by peripheral blood smear at Chuncheon Sacred Heart Hospital from July 1998 to September 2001.Results:Forty-four cases were included in the study. All patients were infected with Plasmodium vivax, and presented with high fever; however, tertian fever developed in only 15 patients (35.7%). A number of cases showed various symptoms, which included headache, abdominal pain, nausea and vomiting. Of the 44 cases identified, 41 (93.2%) developed malaria between June and September.Thrombocytopenia was a prominent finding in 75% of the cases at diagnosis, but resolved during or after therapy. Other laboratory abnormalities such as, anemia, elevated transamines, coagulopathies, and elevated lactose dehydrogenase (LDH) were also noted. Cerebrospinal fluid (CSF), studies were performed in five cases, one of which showed pleocytosis in the CSF.Conclusion:We noted only 15 patients (35.7%) with tertian fever; the other patients showed variable fever patterns. Thrombocytopenia was the most prominent laboratory finding. Therefore, we suggest that malaria should be included in the differential diagnosis of febrile diseases with an onset between June to and September, regardless of the pattern of the fever.