• Medical Lasers
• /
• v.9 no.2
• /
• pp.126-133
• /
• 2020

Recurrent respiratory papillomatosis (RRP) is a benign tumor that occurs in the respiratory tract, especially in the larynx. The etiology of RRP is human papillomavirus (HPV). According to the age of occurrence, RRP is divided into childhood-onset and adult-onset types. Generally, childhood-onset RRP shows a high recurrence rate and diffuse involvement in the respiratory tract. Adult-onset RRP is more localized and appears more frequently as a solitary lesion. It may be the result of sexual transmission or the proliferation of latent HPV infections. At present, the treatment of choice for RRP is CO₂ laser ablation. In addition, pulse dye laser or KTP (KTiOPO: potassium-titanyl-phosphate) lasers are also used. Non-surgical adjuvant therapies can be applied in cases requiring repetitive surgery or with diffuse extensions. This review will introduce the clinical features of RRP and various treatment options including lasers.

• Physical Therapy Korea
• /
• v.5 no.3
• /
• pp.63-71
• /
• 1998

Trunk holding test (Sorensen test) appear to have more value than strength test in prediction the occurrence of low back pain. Electromyographic activity of trunk extensor muscles during these test may provide clues to the etiology of neuromuscular-based low back pain. This study investigated the difference in back muscle endurance between healthy adult men and women using surface electromyographic (EMG) power spectral analysis. Thirty hea1thy subjects (15 men and 15 women) performed an unsupported trunk holding test for 60 seconds. Recording surface electrodes were placed over the erector spinae medially and laterally at vertebral levels of $L_1$ and $L_5$. Slope of total frequency was evaluated using the MP100WSW Fast Fourier Transform spectrum analysis program. The slopes of all indices of back muscle fatigue, except right $L_5$, were significantly steeper in men than in women (p<0.05). Our results indicated that the trunk holding test using EMG power spectral analysis of erector spinae muscles is useful for the evaluation of fatigue rate of these muscles. Our results also showed a higher muscle endurance in healthy adult women than in men.

• Journal of Korean Public Health Nursing
• /
• v.33 no.2
• /
• pp.214-227
• /
• 2019

Purpose: This study examined the socio-demographic factors, the disaster related factors, the physical health related factors and the psychological factors of older adults exposed to natural disaster and these factors may possibly cause the occurrence of PTSD. Methods: A cross-sectional study was designed using the secondary data from the 3rd Disaster Victims Panel Survey (2012-2017). The data from 1,397 disaster victims were analyzed using descriptive statistics and logistic regression analysis. Results: Compared with the younger adult disaster victims, the elderly were more likely to have symptoms of PTSD (15.0% vs. 12.1%). Factors such as the number of years since being exposed to the disaster, anxiety, depression and social adjustment were significantly associated with occurrence of PTSD for both older and younger adults. Female gender was the additional risk factors for the older adults, while marital status, income, having witnessed another person's injury or death, and having lost a home were associated with the occurrence of PTSD. Conclusion: The elderly were more likely to develop PTSD as compared with younger adults. More targeted post-disaster mental health services to the elderly with the symptoms of depressive, anxiety and impaired social adjustments, should be provided to improve their mental health.

• Journal of Chest Surgery
• /
• v.24 no.5
• /
• pp.510-514
• /
• 1991

A fistulous communication between an esophageal traction diverticulum and the tracheo-bronchial tree appears to be of rare occurrence. This report reviews the feature of congenital esophagobronchial fistula associated with esophageal traction diverticulum. This 38-year-old male patient suffered from coughing, hemoptysis, fever and chest pain. This patient was taken a diverticulectomy and lobectomy of right lower lobe. Post-operation course was uneventful.

• Research in Plant Disease
• /
• v.7 no.2
• /
• pp.116-119
• /
• 2001

Witches' broom symptoms were firstly found on tubers of Solanum tuberosum cv, Deijima, showing dense growth of spindly sprouts in Cheju province, Korea. Plantlets from the diseased plants also produced the typical witches' broom symptoms, having densely-growing small leaves when they became adult plants. At the later stages the diseased leaves were blightened. Presence of phytoplasma in plant tissues was confirmed by DAPI-staining fluorescence microscopy and electron microscopy, exhibiting its localization in sieve tubes of stem, petiole, and midrib. This is the first report of potato witches' broom in Korea.

• Asian Journal of Turfgrass Science
• /
• v.8 no.2
• /
• pp.101-103
• /
• 1994

In June 1994, the circular parch of zoysiagrasse(Zoysia japonica) occurred in golf courses in Kyeongnam, Kycooggi province, Korea The causal agent identified as Antonina graminis Maskell (Rhodeagrass scale). A. gramninis settle on a grass leaf shearh and stem, and then suck plants juices, causing daroaged plants to wither and die. Adult scales were legless, immobile, and shell-like protective cover with waxy and 2~Amm in size. Immature scales had three pairs of leg, and were mobile, O.4~ O.9mm in size.

• Korean journal of applied entomology
• /
• v.32 no.1
• /
• pp.83-89
• /
• 1993

This study investigated seasonal occurrence, host preference and developmental characteristics of E. lagerstroemiae was most likely to have two generations a year with first occurrence of adults form late April to late may and second from late August to late October including 2 peaks in early May and late August, respectively. Overwintering stages were mostly eggs and larvae and its composition rate was 57.1% of eggs and 42.9% of larvae. Host plats investigated were 7 species 7 families and most preferred species were Lagerstroemia japonica and Diospyros kaki. As morphological characteristics of E. lagerstroemiae, sized of length/sidth were 0.29/0.16 mm for the egg. 0.41/0.16 mm for the first instar larva, 0.96/0.47 mm for the male adult. Number of eggs deposited per female adult was 221.9 individuals. Hatching rate at various temperatures was above 90% at below $30^{\circ}C$. Egg periods were also short\ened with increase of temperatures at below $30^{\circ}C$ but decreased to 56.3% at $35^{\circ}C$. Egg periods were also shortened with increase of temperatures at below $30^{\circ}C$. Hatching rate was not affected by photoperiods but egg periods were shortened with increase of day length.

• Asian Journal of Turfgrass Science
• /
• v.25 no.1
• /
• pp.22-29
• /
• 2011

Host plants of Popillia flavosellata (Coleoptera: Ruteridae) were investigated at the courses of three golf clubs, East Valley Golf Club, Anyang Benest Golf Club, and Anseong Benest Golf Club and their surrounded forests. In addition, seasonal occurrence was examined from East Valley Golf Club using Japanese beetle pheromone lure and a eugenol feeding attractant. Twenty six species of 25 genera in 18 families were recorded as hosts of P. flavosellata from given surveyed golf clubs. Out of them, 22 species of 21 genera in 15 families were newly recorded host plants of P. flavosellata. Thus, host plants of P. flavosellata were 49 species of 41 genera in 23 families in total including hosts from literatures. The main damage part of P. flavosellata adult was flower of host plants. Peak activity of P. flavosellata adult was observed around 20 June. Mean numbers of attracted P. flavosellata adults at the peak day were 197.6/trap/day in 2008 and 268.1 in 2010, respectively. Occurrence of P quadriguttata was much lower compared with P. flavosellata at the given golf club. That is, mean numbers of attracted P quadriguttata adults from the same trap at the peak: day were 0.4/trap/day in 2008 and 2010, respectively.

• Animal cells and systems
• /
• v.16 no.5
• /
• pp.415-424
• /
• 2012

Four species of ophichthid leptocephali were identified using 12S rDNA sequences, and their morphological descriptions were first provided based on six individuals (S1-S3,M1, and E1-E2) collected from the East Sea and the Korea Strait between September 2008 and October 2010. Mitochondrial 12S rDNA 859-861 base pairs of ophichthid leptocephali were compared with those of 16 ophichthids adult and 2 outgroups (Anguilla japonica and Conger myriaster). Leptocephali of S1 and E1 were very closely clustered with adult of Scolecenchelys borealis (D=0.002) and Echelus uropterus (D=0.000), respectively. However, leptocephali of S2-S3 andM1 were slightly far clustered with leptocephalus of S1 (D=0.006) and adult of Muraenichthys gymnopterus (0.034), respectively. We believe that S1 and E1 are S. borealis and E. uropterus, respectively, in which the former is unrecorded species in Korea. However, S2-S3 and M1 may be undescribed species belonging to genus Scolecenchelys and Muraenichthys, respectively, because total numbers of myomeres for S2-S3 (148-158) and M1 (151) were not consistent with total numbers of vertebrae or distribution for any adult of Scolecenchelys spp. and Muraenichthys spp. in the world. We propose the new Korean name 'Dong-hae-mul-baem' for S. borealis.

• Journal of Forest and Environmental Science
• /
• v.11 no.1
• /
• pp.40-49
• /
• 1995

This study was carried out to investigated the developmental characteristics and spatial distribution of mango shield scale, Protopulvinaria mangiferae injuring to Elaeocarpus sylvestris(Lour.) This mango shield scale is parthenogentic. The oviparous female have three larval stages and adult. This species has two generation a year. The crawlers of the 1st generation emerged from late may to middle July, and those of the 2nd generation from early August to early October. Their emergence reached its peak in early part of the occurrence period. The crawlers disperse from 10 to 14 o'clock from ventral side of the adult and more than 90% had settled with in 8 hours on the leaves of E. sylvestris. The larvae and adults were distributed contagiously between trees. The adult densities were higher in the lower part of the crown than those in the middle or upper parts. But differents in densities were not significant among four directions. The distribution of the adult scales per leaf cluster showed an aggregation with a slightly colonized pattern.