Noise exposure assessment of workers inspecting construction machinery vehicles in the Republic of Korea.

Previous studies have investigated the health hazards caused by exposure to the noise of heavy equipment used at construction sites. Korea's Ministry of Land, Infrastructure, and Transport operates a registration system for construction machinery, and regular safety inspections are mandatory. Although workers inspecting construction machinery vehicles are exposed to unwanted noise, no noise exposure assessment has been made regarding these workers in Korea.

[Factors Associated with Pressure to Eat as a Feeding Practice among Mothers with Infants].

Purpose: This study aimed to identify factors-both infant-related and maternal-associated with pressure to eat as a feeding practice among mothers with infants.

Methods: This study used a cross-sectional design and included 163 mothers of infants aged 2~12 months. Of the 180 self-reported questionnaires that were distributed, 163 (91%) were included in the data analysis.

Psychosocial Factors Associated with Smoking Cessation Attempts in Korean High School Students Who Engage in Intermittent and Light Smoking.

Purpose: This study aimed to identify psychosocial factors associated with smoking cessation attempts among Korean high school students who engage in intermittent and light smoking.

Methods: Cross-sectional secondary data derived from the 2018 Korea Youth Risk Behavior Web-Based Survey were analyzed within the framework of the biopsychosocial model. The sample comprised 829 high school students who reported current intermittent and light smoking, which was defined as cigarette smoking on 1~29 days in a 30-day period and no more than 10 cigarettes per day.

Associated Factors of Ischemic Heart Disease Identified Among Post-Menopausal Women.

Objectives: This study identifies associated factors of ischemic heart disease (IHD) among post-menopausal Korean women at the biomedical (age, family history of hypertension, dyslipidemia, type 2 diabetes mellitus, or cerebro-cardiovascular disease, body mass index, and metabolic syndrome), biosocial (socioeconomic status and educational level), and psychosocial levels (stress, depression, smoking, binge alcohol consumption, and physical activity).

Methods: This study used a cross-sectional design with secondary data analysis of the 2013-2016 Korean National Health and Nutrition Examination Survey. Data from 3,636 women were analyzed by logistic regression analysis using a complex sample procedure.

A survey study of institutional review board thought processes in the United States and South Korea.

Introduction: In the last several decades, South Korea has rapidly adopted Western customs and practices. Yet, cultural differences between South Korea and the United States exist. The purpose of this study was to identify and characterize potential cultural differences in the Korean and US institutional review board (IRB) approach to certain topics.

P-glycoprotein inhibitory activity of two phenolic compounds, (-)-syringaresinol and tricin from Sasa borealis.

(-)-Syringaresinol and tricin, isolated from the AcOEt-soluble extract of the whole plants of Sasa borealis (Gramineae), showed inhibitory effects on the P-glycoprotein in adriamycin-resistant human breast cancer cells, MCF-7/ADR.

Cytotoxic constituents from the whole plant of Corydalis pallida.

Here we report the cytotoxic activity of three known compounds isolated for the first time from Corydalis pallida (Papaveraceae). An isoquinoline alkaloid, berberine, exhibited cytototoxic activity against two human cancer cell lines, HT-1080 (human fibrosarcoma) and SNU-638 (human stomach adenocarcinoma), with IC50 values of 3.2 and 3.

Cyclooxygenase-2 inhibitory phenylbutenoids from the rhizomes of Zingiber cassumunar.

Phenylbutenoids isolated previously from the CHCl3 extracts of the rhizomes of Zingiber cassumunar, were evaluated for their cyclooxygenase-2 (COX-2) inhibitory activity along with a new isolate, from the n-BuOH extracts of this plant. The COX-2 inhibitory assay was performed by measuring prostaglandin E2 production in lipopolysaccharide-stimulated mouse macrophage RAW 264.7 cells.

Di- and sesqui-terpenoids isolated from the pods of Sindora sumatrana and their potential to inhibit lipopolysaccharide-induced nitric oxide production.

Activity-guided fractionation of the n-hexane and CHCl3-soluble fractions of Sindora sumatrana using a bioassay based on the inhibition of lipopolysaccharide (LPS)-induced nitric oxide (NO) production by inducible nitric oxide synthase (iNOS) in murine macrophage RAW 264.7 cells led to the isolation of the known compound, (+)-7beta-acetoxy-15,16-epoxy-3,13(16),14-clerodatriene-18-oic acid (2) as an active constituent. In addition, a new trans-clerodane diterpenoid, (+)-2-oxokolavenic acid (1), together with six known compounds, (+)-3,13-clerodadiene-16,15-olide-18-oic acid (3), (+)-7beta-acetoxy-3,13-clerodadiene-16,15-olide-18-oic acid (4), (+)-7beta-acetoxy-16-hydroxy-3,13-clerodadiene-16,15-olide-18-oic acid (5), beta-caryophyllene oxide (6), clovane-2beta,9beta-diol (7), and caryolane-1,9beta-diol (8) were isolated and found to be inactive.