Direct formation of small Cu2O nanocubes, octahedra, and octapods for efficient synthesis of triazoles.

In most studies describing the preparation of Cu2O crystals of various morphologies, the particle sizes are normally hundreds of nanometers to micrometers due to rapid particle growth, so they are not exactly nanocrystals. Here we report surfactant-free formation of sub-100 nm Cu2O nanocrystals with systematic shape evolution from cubic to octahedral structures by preparing an aqueous mixture of Cu(OAc)2, NaOH, and N2H4 solution. Adjustment of the hydrazine volume enables the particle shape control.

Arteriovenous malformation of the mandible presented as massive upper gastrointestinal bleeding: report of one case.

Arteriovenous malformation is an uncommon cause of upper gastrointestinal bleeding in children. It should be taken into consideration when a child has upper gastrointestinal bleeding because without proper management, it might be fatal. We report a 10-year-old boy whose initial presentation was massive hematemesis and impending shock.

Rubella seroprevalence among young women taipei county after routine measles, mumps and rubella immunization program.

To better target rubella immunization efforts by determining the age-specific rubella seroprevalence and the related factors for children in Taiwan after the 1986 national vaccine policy. A cross-sectional study was conducted for these girls aged 10 years (1994 cohorts), 13 years (1991 cohorts), 16 years (1988 cohorts), and 19 to approximately 22 years (1982-1985 cohorts), respectively, in 2004 in Taipei county. Participants were given a questionnaire detailing family income, education level, ethnicity of mother, number of siblings, and history of rubella infection.

Clinical criteria for diagnosing perforated appendix in pediatric patients.

Objective: To determine predictive variables associated with a perforated appendix in pediatric patients with acute appendicitis.

Methods: This is a retrospective, cross-sectional, observational study from a medical center with more than 2000 beds (230 beds in Department of Pediatrics and Pediatric Surgery), with a mean admission of more than 12000 cases and 2200 surgeries per year. The outcome variable was perforated appendix, and the predictive variables included demographic and clinical factors.

Correlation between age and allergens in pediatric atopic dermatitis.

Background: There has been significant progress recently in the clinical investigation of atopic dermatitis (AD), especially in the recognition of aeroallergens as aggravating factors in AD. However, sensitization to food allergens and aeroallergens in children with AD has not been fully studied.

Objective: To evaluate the correlation between age and allergens in children with AD.