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한국 소나무류에 잎떨림병을 일으키는 Lophodermium 속 균의 동정
이승규(Seung Gue Lee),이경준(Kyung Joon Lee),나용준(Yong Joon La),양성일(Seong Il Yang),이창근(Chang Keun Yi) 한국산림과학회 1989 한국산림과학회지 Vol.78 No.2
Fallen and living pine needles bearing ascocarps were collected throughout the country from February, 1987 to October, 1988 to identify and describe Lophodermium species associated with Lophodermium needle cast disease of pines in Korea. All of the observed characteristics of given species were compared with published descriptions of the Lophodermium species. As a result of this study, six Lophodermium species were identified and described. L. pinastri was previously recorded while the other five species, i.e., L. australe, L. durzlabrum, L. nitens, L. pini-excelsae and L. pini-pumilae, were unrecorded in Korea. One Lophodermium species has not been fully identified in this study, and tentatively named as L. sp-1. L. australe was observed on the needles of Pinus rigida, P. rigida × taeda and P. taeda, L. pini-excelsae on P. parviflora and P. strobus, L. nitens, L. durilabrum and L. pini-pumilae on P. koraiensis, L. sp-1 on P. thunbergii and L. pinastri on P. densiflora and P. taeda. L. sp-1 was collected from the diseased regions of 2-year-old needles of P. thunbergii and L. durilabrum from P. koraiensis, suggesting pathogenic nature of these fungi.
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정상 신생아의 대변에서 생후 1주일 동안 장내세균총의 변화
성남주,이승규,김미진,김영호,양승,황일태,정지아,이혜란,김재석,Sung, Nam-ju,Lee, Seung Gue,Kim, Me Jin,Kim, Young Ho,Yang, Seung,Hwang, Il Tae,Jung, Ji A,Lee, Hae Ran,Kim, Jae-Seok 대한소아소화기영양학회 2006 Pediatric gastroenterology, hepatology & nutrition Vol.9 No.2
Purpose: Microbial colonization of the intestine begins just after birth and development of the normal flora is a gradual process. The first bacteria colonizing the intestine in newborns are Staphylococcus, Enterobacteriaceae and Streptococcus. For several days after birth, the number of Bifidobacterium spp. increase. The aim of this study was to investigate the changes of microflora for seven days postnatally in neonatal stool. Methods: Fifteen neonates (breast : formula : mixed feeding 1 : 8 : 6, vaginal delivery : cesarean section 3 : 12) who were born at the Kangdong Sacred Heart Hospital, Hallym University were enrolled. First meconium and stools of postnatal 1-, 3-, and 7-day were innoculated. Blood agar plates for total aerobes, trypton bile X-glucuronide agar for E. coli, phenylethyl alcohol agar for gram positive anaerobes, MRS agar for Lactobacillus spp., bifidobacterium selective agar for Bifidobacterium spp. and cefoxitin-cycloserine-fructose agar for Clostridium difficile were used in the general incubator ($CO_2$ free incubator), $CO_2$ incubator or the anaerobic chamber for 48 or 72 hours at $37^{\circ}C$ and then colony forming units were counted. Results: No microflora was identified in the first meconium. Total aerobes, E. coli, and gram positive anaerobes were significantly increased with advancing postnatal days. In only one baby, Lactobacillus acidophilus was detected $2{\times}10^5CFU/g$ in the seven-day stool. Bifidobacterium spp. was detected in two babies. Clostridium difficile was not detected during the seven days. There were no significant differences in the bowel flora depending on the delivery pattern and feeding method. Conclusion: This study shows many changes in the intestinal normal flora in neonatal stool during seven days postnatally. If these findings are confirmed with larger studies, the data may be preliminary findings to support use of probiotics in neonates.
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GPRS / UMTS망의 GGSN노드에서 실시간 서비스를 위한 Diffserv기반의 QoS보장 방안 기법
동정식(Jeong-Shik Dong),마경민(Kyong-Min Ma),원정재(Jeong-Jae Won),김대익(Dae-Ik Kim),이승규(Seung-Gue Lee),김영진(Young-Jin Kim),이형우(Hyung-Woo Lee),조충호(Chung-Ho Cho) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.2Ⅲ
GPRS/UMTS 망에서 터널링 프로토콜인 GTP(GPRS Tunneling Protocol)는 QoS를 고려하지 않는 단순한 GSN(GTP Support Node)의 터널링 기법이 적용되고 있다. 즉 모든 트래픽에 대해서 동일한 터널링 기법이 적용되고 있으므로 외부 망에서 입력되는 트래픽에 대한 QoS를 보장하기가 어렵다. 따라서, QoS 제어가 가능한 인터넷 망(RSVP, Diffserv)과 연동(interwotking)이 가능하면서 외부 망의 트래픽을 GPRS 망에 받아들여 효율적으로 처리할 수 있는 GGSN 노드의 트래픽 QoS 제어 메커니즘에 대해 이 연구되어져야 한다. 본 논문에서는 GPRS/UMTS망에서 클래스별 패킷 트래픽 처리의 성능향상을 위해서 망의 게이트웨이 역할을 담당하는 GGSN에서 Diffserv edge function을 할 경우에 실시간 트래픽의 QoS 보장을 위한 클래스별 트래픽 제어 방법에 대해 분석하였다.
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