Dong-Hoon Lee

The effects of Mn dispersoids on the enhancement of mechanical properties in Al–Mg–Si(–Mn) alloys have been studied to develop a new high Mn alloy which does not need an aging heat treatment after a shaping process (i.e. extrusion process). By adding Mn to Al–Mg–Si alloys, sphere- or rod shaped Mn dispersoids of a size ranging from 0·05 to 0·5 μm are formed by the use of proper heat treatments. The as extruded alloys containing 1·0 wt-%Mn are measured to have higher tensile properties with good

Omega-3 fatty acids and other nutrients in fish (used herein to refer to finfish or shellfish) are believed to protect against cardiovascular diseases in adults and also to be beneficial in fetal development.1 2 However, there is a concern that benefits may be offset by the presence of contaminants such as methylmercury (MeHg) and persistent organic pollutants (POPs, including chemicals such as polychlorinated biphenyls, dioxins, various organochlorine pesticides and polybrominated diphenylether

OBJECTIVES: Resuscitation on a medical bed is difficult because of the need to match the height of the bed to the height of the rescuer, which is impossible on a fixed-height medical bed. This study investigated the effect of using a step stool on chest compressions performed on a manikin in a fixed-height medical bed. METHODS: This prospective, observational study was performed using simulated resuscitation manikins and a fixed-height (78 cm) medical bed. Chest compression-ventilation of more t

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 628:95-104 (2019) - DOI: https://doi.org/10.3354/meps13084 Chemosynthetic bacterial signatures in Frenulata tubeworm Oligobrachia sp. in an active mud volcano of the Canadian Beaufort Sea Dong-Hun Lee1, Jung-Hyun Kim2,*, Yung Mi Lee2, Young Keun Jin2, Charles Paull3, Dahae Kim2, Kyung-Hoon Shin1 1Hanyang

Eleven patients with arytenoid dislocation were identified. The causes of arytenoid dislocation were intubation (n = 9) and blunt trauma (n = 2). All cases of arytenoid dislocations were treated by closed reduction. There were no major complications resulting from surgical intervention. Six of the 11 patients (54.5%) regained normal voice and vocal fold movement after closed reduction. Five patients (45.5%) had significant voice improvement postoperatively. In arytenoid dislocation due to blunt

Chondrosarcoma of the nasal septum is extremely rare. In some cases, it may be difficult to preoperatively differentiate low grade chondrosarcoma from benign cartilaginous tumors such as chondroma. We report a case of low grade chondrosarcoma of the nasal septum with characteristic radiologic findings. Characteristic radiologic findings such as calcifications on computed tomography scan and a ring-and-arc pattern on enhanced T1 weighted image were useful in the preoperative diagnosis of low grad

Background Escalator‐related injuries have been considered uncommon and most likely to occur in children. In this study, we described the epidemiology of these injuries with focus on the aged population in order to determine whether escalators are safe for the aged, and to obtain information to help in preventing escalator‐related injuries. Methods A prospective survey was taken to identify the number and nature of these injuries from May 2004 to December 2008. We enrolled patients who had susta

Chemical solution depostion of nanocrystalline Zn2SiO4:Mn on the biogenic silica frustule derived from the cultured marine diatom (Pinnularia sp.) is reported. Our deposition process uses rather simple chemistry that consists of only metal halides and water. Two types of nanostructures can be generated, depending upon the level of the initial chemical deposition coverage. The nanostructured Zn2SiO4:Mn exhibited bright green photoluminescence. The intricate micro and nanostructures of the frustul

The aims of this study were to investigate the reasons of transfers from long-term care hospitals (LTCHs) to emergency departments (EDs) of university hospitals in geriatric patients and to categorize the avoidable causes of these transfers. This retrospective multicenter study involved patients aged 65 years and older who were transferred from LTCHs to 5 EDs of university hospitals located in the metropolitan area of South Korea between January 2017 and December 2017. The expert panel reviewed