• Research in Plant Disease
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• v.28 no.2
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• pp.57-60
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• 2022

Leaves of Chionanthus retusus were found to be damaged by leaf spot disease associated with a fungus in Iksan, Korea. Leaf spots were angular to irregular, vein-limited, scattered, 1-8 mm diameter, brownish-gray to dark brown when dry, with heavy fructification. The pathogen causes premature defoliation of C. retusus plant and was identified as Pseudocercospora chionanthi-retusi based on morphological and molecular-phylogenetic analyses. The phylogenetic tree was constructed using multi-locus DNA sequence data of partial actin (actA), partial translation elongation factor 1-alfa (tef1), partial DNA-directed RNA polymerase II second largest subunit (rpb2) genes, and internal transcribed spacer regions. Current study provides detail morphological description of P. chionanthi-retusi on C. retusus in Korea, with supports of phylogenetic analysis and pathogenicity test.

• Progress in Superconductivity and Cryogenics
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• v.24 no.2
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• pp.23-26
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• 2022

A lossless transport of an arbitrary waveform in a frequency range of 10⁶-10⁹ Hz through a conduction channel in a cryogenic temperature is of importance for a high-speed operation of quantum device. However, it is hard to use a commercial oscilloscope to directly detect the waveform travelling in a device located in a cryogenic system. Here, we developed a cryogenic voltage sampling technique by using a Schottky barrier gate prepared on a surface of a GaAs/AlGaAs device, which revealed that an incident rectangle waveform can transport through a 1 mm long two-dimensional conduction channel without waveform deformation up to 20 MHz, while further study is needed to increase the detection frequency.

• Annals of Clinical Neurophysiology
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• v.25 no.1
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• pp.10-18
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• 2023

The ultimate purpose of eye movement is to maintain clear vision by ensuring that images of observed objects are focused on the fovea in the retina. Accurate evaluation of ocular movements, including nystagmus and saccadic intrusions, provides very useful information for determining the overall function and abnormality of the complex oculomotor system, from the peripheral vestibular system to the cerebrum. Eye movement tests are therefore essential for the accurate diagnosis of patients who complain of dizziness and imbalance. They help to predict lesion locations from the peripheral vestibular system to the central cerebral cortex and play an important role in differentiation from other diseases. The methodology of recording and interpreting ocular movements using video-oculography are described in this review article.

• Journal of the Korean Institute of Rural Architecture
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• v.25 no.2
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• pp.35-42
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• 2023

This study investigated and analyzed the village space and architectural characteristics of Eoeun Village, Samgye-myeon, Imsil-gun, Jeonbuk. The space of the village was formed based on the idea of feng shui, and the Confucian hierarchical idea determined the location, size, and structure of the building. Recently, clan villages in rural areas have been dismantled and damaged due to population outflow and urbanization. In this situation, Eoeun Village, which preserves the traditional space and residential form at the time of the village's creation, is considered to be worth preserving and studying.

• The Korean Journal of Mycology
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• v.51 no.1
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• pp.57-62
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• 2023

In Korea, Cornus controversa and C. florida are known as hosts of Erysiphe pulchra from section Microspharea of the genus Erysiphe. However, recent molecular-phylogenetic analyses on the internal transcribed spacer regions and large subunit gene of the rDNA revealed that the Erysiphe powdery mildew on C. controversa in Japan is in fact E. cornicola. To assess the taxonomic status of Erysiphe-C. controversa association in Korea, isolates collected since 1987 were investigated and consequently identified as E. cornicola based on molecular-phylogenetic analyses and new morphological traits. To our knowledge, this is the first study to confirm the presence of this powdery mildew in Korea.

• The Korean Journal of Mycology
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• v.50 no.3
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• pp.243-248
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• 2022

In Japan and China, Podosphaera pseudofusca causes powdery mildew in Fatoua villosa. During a taxonomic revision of Korean powdery mildew fungi, isolates newly collected from F. villosa were studied. Through morphological examination and molecular phylogenetic analyses of the internal transcribed spacer region and large subunit gene of rDNA, the powdery mildew fungus was identified as Podosphaera xanthii. In this study, we propose the merging of P. pseudofusca sensu Braun into the P. xanthii complex. To the best of our knowledge, this is the first report of Podosphaera powdery mildew on F. villosa in Korea.

• The Korean Journal of Mycology
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• v.50 no.2
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• pp.137-141
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• 2022

In Korea, powdery mildew has been observed on Quercus rubra, commonly called the northern red oak tree. Based on its morphological and molecular phylogenetic analyses, the fungal agent was identified as Erysiphe quercicola, but it was distinct from the other four Erysiphe species, specialized to Quercus species. This is the first confirmed report on the identity of powdery mildew found on Q. rubra in Korea. This finding can help understand the host expansion of E. quercicola and the biodiversity of powdery mildew on Quercus species.

• The Korean Journal of Mycology
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• v.50 no.1
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• pp.55-59
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• 2022

Anamorph of a powdery mildew was collected from Convolvulus arvensis (Convolvulaceae) in 2021 in Korea. Based on the morphological examination and molecular phylogenetic analyses of the internal transcribed spacer and large subunit rDNA gene, the powdery mildew was identified as Erysiphe convolvuli. This powdery mildew species is commonly found in Europe and North America, but rarely in East Asia. The holomorph of this powdery mildew was first recorded on Calystegia hederacea in Korea. Conclusively, this is the first report of E. convolvuli on C. arvensis and the second record of this powdery mildew species in Korea.

• The Korean Journal of Nuclear Medicine Technology
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• v.27 no.1
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• pp.7-8
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• 2023

A 50-year-old female patient referred by the department of breast and thyroid surgery was recommended for orthopedic surgery because lesion like herniation pit was found in the left proximal femur in bone mineral densitometry (BMD). She was later diagnosed with bone metastasis on biopsy in orthopedic surgery. Pelvic X-ray and Lt thigh MRI were performed . Intra-medually nail was operated later. The BMD is a diagnostic method that determines the results by numerical values, so it is inevitable to neglect to observe the bone shape, but as shown in the above case, the examiner's observation of changes in bone shape can return to beneficial treatment for patients.

• The Korean Journal of Nuclear Medicine Technology
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• v.27 no.1
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• pp.9-10
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• 2023

A 78-year-old female patient referred by the department of obstetrics and gynecology was recommended for orthopedic surgery because a cystic lesion was found in the left femoral proximal area in the bone mineral densitometry. CT scan and general X-ray performed in the orthopedic department found benign tumors later. Intra-medullary nail was operated. Curettage and bone graft were performed. Radiotechnologist is also important for the morphological observation of femur in the femoral BMD. It provides a lot of benefits to the patient.