Simultaneous quantification of six nonpolar ginsenosides in white ginseng by reverse-phase high-performance liquid chromatography coupled with integrated pulsed amperometric detection.

Background: White ginseng consists of the roots and rhizomes of the species, and red ginseng is made by steaming and drying white ginseng. While red ginseng has both polar and nonpolar ginsenosides, previous studies showed white ginseng to have only polar ginsenosides. Because nonpolar ginsenosides are formed through the manufacture of red ginseng from white ginseng, researchers have generally thought that nonpolar ginsenosides do not exist in white ginseng.

Job stress and its related factors among Korean dentists: An online survey study.

Objectives: The aims of this study were to investigate the dentists' job-related stress using the newly developed Dentist Job Stress (DJS) questionnaire, and to explore the relationships among sociodemographic factors, job stress and mental health indicators, including psychosocial stress, depression, anxiety and sleep among Korean dentists.

Materials And Methods: An online survey including 1,520 dentists was conducted using the Brief Encounter Psychological Instrument-Korean version (BEPSI-K), the Center for Epidemiologic Studies Depression Scale (CES-D), the State-Trait Anxiety Index (STAI) and the Pittsburgh Sleep Quality Index (PSQI).

Results: The response rate was 15.

Correlation of occupational stress with depression, anxiety, and sleep in Korean dentists: cross-sectional study.

Background: This study aimed to investigate the degree of occupational stress and the clinical mental state of dentists. In addition, we investigated the correlation of occupational stress with depression, anxiety, and sleep among dentists in Korea.

Methods: A cross-sectional survey on 231 dentists was conducted using the Doctor Job Stress Scale, Center for Epidemiologic Studies Depression Scale (CES-D), State-Trait Anxiety Index (STAI), and Pittsburgh Sleep Quality Index (PSQI).

Surgical results of intradural extramedullary tumors.

Background: To report the treatment results of 12 patients who underwent a total excision of intradural extramedullary tumors.

Methods: Twelve cases of histopathologically confirmed intradural extramedullary tumors were treated surgically between February 2002 and March 2005. There were 8 males and 4 females with an average age of 42.

[An Epidemiological Note On The Taeniasis In Korea].

The present study was undertaken to evaluate the prevalence rate of Taenia spp. infection and distribution of taeniasis caused by T. solium among Koreans in several localities in Korea during the period from 1977 to 1980.