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Toxicity testing of wastewater and inter-laboratory comparison based on Lemna minor root elongation
Jihae Park(박지혜),Eun-Jin Yoo(유은진),Kisik Shin(신기식),Soyeon Choi(최소연),Hojun Lee(이호준),Geonhee Kim(김건희),Stephen Depuydt(스테픈 데퓨잇),Jonas De Sager(요나스 데 세거),Taejun Han(한태준) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
The Lemna minor root regrowth test method is a toxicity test performed with very simple equipment and only one L. minor plant (two- to three-frond) in each culture well, cutting the roots before exposure and measuring the regrowth of the newly developed roots after three days. As a substrate for laboratory toxicity assays, L. minor has the advantages of small size, structural simplicity and rapid growth. Compared to the three internationally standardized methods, this bioassay is faster, simpler, more convenient and cheaper. It can be applied to a variety of sample types, including (a) individual chemicals, commercial products or known mixtures of chemicals, (b) industrial or urban freshwater effluents, elutriates or leachates and (c) surface freshwater or receiving waters. The test can be used alone or as part of a test battery to determine and monitor the toxic effects of individual substances or complex mixtures that may be harmful to aquatic life in freshwater ecosystems, and as a weight-of-evidence approach to determine the need for controlling discharges and setting effluent standards.
Tuberculous Epididymo-Orchitis with Multifocal Extrapulmonary Tuberculosis: a Case Report
Jihae An 대한자기공명의과학회 2022 Investigative Magnetic Resonance Imaging Vol.26 No.1
Tuberculous epididymo-orchitis, a rare form of extrapulmonary tuberculosis, results from hematogenous dissemination or retrograde extension from the lower urinary tract. Herein, we studied the case of a 22-year-old male patient who presented with refractory left scrotal pain and inflammation. The patient also complained of multifocal pain involving the right buttock, posterior thigh, and right wrist, without trauma history. The patient was diagnosed with multifocal tuberculosis by sputum AFB study and right sacroiliac joint biopsy.
311-nm titanium:sapphire laser therapy for alopecia areata: a pilot study of 19 patients
( Jihae Lee ),( Ro Woo Lee ),( Soo Hyung Kim ),( Hyun Jeong Ju ),( Sung Hye Eun ),( Jung Min Bae ),( Gyong Moon Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2
Background: Alopecia areata (AA) is an autoimmune skin disorder causing hair loss and has a large impact on patients’ quality of life. Laser treatment including 308-nm excimer laser has an advantage in treating AA in a targeted manner. Recently, a gain-switched 311-nm Titanium:Sapphire laser (TSL) was developed and demonstrated similar therapeutic efficacy to excimer laser in the treatment of vitiligo. Objectives: We evaluated the effectiveness and safety of the 311-nm TSL in the treatment of AA. Methods: We conducted an open trial and enrolled 19 AA patients between June 2017 and December 2018. A 311-nm TSL laser treatment was conducted once or twice a week. The dose started at 300 mJ/cm2 and increased by 50 mJ/cm2 in each subsequent session until post-treatment erythema occurred. Results: Among the 19 enrolled AA patients, three had alopecia totalis. The patients received a median of 14 sessions (range, 10-34) of TSL treatment for 3.5 months (range, 2-8). Fourteen patients (73.9%) showed excellent to complete (≥75%) hair regrowth. There were no serious adverse events to stop the treatment. Conclusion: The 311-nm TSL treatment has several advantages that it provides non-invasive, pain-free treatment to AA patients, without any risk of adverse drug reaction. In particular, TSL treatment has great benefits for children who worried about painful treatment.
Paratesticular Liposarcoma with Atypical Image Findings: a Case Report
Jihae An 대한자기공명의과학회 2022 Investigative Magnetic Resonance Imaging Vol.26 No.1
Paratesticular liposarcoma is a very rare tumor that is typically reported as isolated cases of or as components of larger studies of liposarcomas. Image findings are similar to those of other anatomic sites, but in less-common sites, their appearance may be less familiar, and they may be mistaken for other pathologies. In addition, atypical image findings of liposarcoma make diagnosis more difficult. Herein, we report on the case of a 45-year-old male patient who presented with a painless, palpable mass in the right scrotum. The patient was diagnosed with paratesticular liposarcoma by excisional biopsy.