Pollen metabarcoding reveals the floral resources and niche overlap of honeybees in forest areas

Do Yuno,Park Woong‐Bae,Park Jun‐Kyu,Kim Chang‐Jun,Kim Il‐Kwon,Choi Moon Bo 한국곤충학회 2022 Entomological Research Vol.52 No.12

We investigated the floral resources of the honeybee (Apis mellifera)bypollenDNA metabarcoding as the first step in honeybee conservation. We attempted to identify as many floral resources and as wide resource availability as possible in areas and compared the richness of floral resources between forests and national parks. We found that both forest and national parks can sufficiently support honeybee floral resources; however, national parks were more stable habitats with more complex vegetation structure than those of forests. Also, honeybee’s preferences for floral resources were determined using niche breadth, niche overlap, and network analysis among the floral resources in forest areas. Quercus and Actinidia were the most frequently detected taxa of pollen resources in both forests and national parks by pollen metabarcoding. Even though we anticipated that more various pollen resource taxa would be found in national parks than forests, no differences in the number pollen resource taxa were detected between them. According to the niche overlap analysis result, the honeybee preferred the pollen resources in both forests and national parks, and the co-occurrence pattern analysis of pollen resource taxa in both forests and national parks showed a simple network. Altogether, our findings suggested that DNA metabarcoding of pollen collected by the honeybee can provide useful information on the flowering plants in a given area. As the use of floral pollen resources varies spatially and temporally, periodic monitoring of pollen resources can identify which pollen is required to maintain the health of honeybee colonies.

GG-38 : Minimal invasive surgery (LESS) for huge cystic adnexal tumors in whole abdomen

( In Young Choi ),( Ji Hye Lee ),( Mi Hyun Park ),( Ji Kwoun Park ),( Jeong Kyu Shin1 ),( Won Jun Choi1 ),( Soon Ae Lee ),( Jong Hak Lee ),( Won Young Paik ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-

Laparoendoscopic single-site surgery (LESS) is helpful if not an evidence of suspicious malignancy in huge adnexa tumors. This approach might be reasonable alternative to conventional laparoscopic surgery. We report two cases with LESS for huge cystic adnexal tumors in whole abdomen. A 58 years old multigravida woman in menopause underwent removal of a huge cystic adnexal mass that occupied her entire abdomen by LESS.(ca.5200ml aspiration) A 15 years old single nulligravida woman had a huge cystic adnexal tumor in whole abdomen reaching to the level of the xyphoid process. A needle through the transumbilical single port was inserted directly under the mass. Subsequently, 8000 ml of cystic fluid was aspirated without spillage.

Development of a Reduction Algorithm of GEO Satellite Optical Observation Data for Optical Wide Field Patrol (OWL)

Sun-youp Park,Jin Choi1,Jung Hyun Jo,Ju Young Son,Yung-Sik Park,Hong-Suh Yim,Hong-Suh Yim,Hong-Kyu Moon,Young-Ho Bae,Jang-Hyun Park 한국우주과학회 2015 Journal of Astronomy and Space Sciences Vol.32 No.3

An algorithm to automatically extract coordinate and time information from optical observation data of geostationary orbit satellites (GEO satellites) or geosynchronous orbit satellites (GOS satellites) is developed. The optical wide-field patrol system is capable of automatic observation using a pre-arranged schedule. Therefore, if this type of automatic analysis algorithm is available, daily unmanned monitoring of GEO satellites can be possible. For data acquisition for development, the COMS1 satellite was observed with 1-s exposure time and 1-m interval. The images were grouped and processed in terms of “action”, and each action was composed of six or nine successive images. First, a reference image with the best quality in one action was selected. Next, the rest of the images in the action were geometrically transformed to fit in the horizontal coordinate system (expressed in azimuthal angle and elevation) of the reference image. Then, these images were median-combined to retain only the possible non-moving GEO candidates. By reverting the coordinate transformation of the positions of these GEO satellite candidates, the final coordinates could be calculated.

우심방을 침범한 거대 비호지킨씨 림프종 1예

강상범,진승원,이은경,박용현,최용호,김용주,박준철,김재형,홍순조,최규보,권종범,원용순,박건,이은희 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.4

體育特技者의 肺機能과 運動後 恢復期의 血液가스의 變化

崔圭澤,朴載植,黃樹寬,朱永恩 慶北大學校 1985 論文集 Vol.39 No.-

The pulmonary function and changes of blood gas tensions and pH in the athletes have been reported but are fragmentary as to require more complete studies including all the pulmonary parameters and blood gas tensions especially at the early part of 20 years of age. This study was aimed to elucidate the pulmonary function at the rest and the changes of venous blood gas tension and pH after the exercise in the athletes of physical education students. The subjects chosen for this study were 15 athletes of physical education students (special group) of 21-25 years of age. The athletes had at least four years of exercise careers, and were compared with 12 non-athletes of physical education students (general group) who had not been subjected to any form of rigorous training program. All the subject were directed to perform running on the treadmill for three minutes under the condition of 15% grade and 5 MPH. The venous blood samples were taken at the rest as well as at 0, 5, 10 and 20 minutes after the exercise to check the changes of Pco_2, Po_2 and pH during the recovery period. The venous blood Pco_2, Po_2 and pH were determined using the Model 175 Automatic Blood Gas Analyzer by Corning Co., and the pulmonary function using the computerized spirometer. The results obtained were compared with the general group and summarized as follows: The special group exhibited higher values of the pulmonary function except FVC compared with the general group, and particularly FEV_0·5% and FEV_1% were significantly different. The venous Po_2 was decreased immediately after the exercise, but increased during the recovery period. The special group generally showed higher oxygen partial pressure than the general group. The venous Pco_2 in contrast to the oxygen increased immediately after the exercise, but decreased during the recovery period. The special group showed lower carbon dioxide partial pressure. Blood pH was significantly decreased from the resting value after the exercise and returned to the resting value at 20 minutes. In the special group, however, the change of pH was less than in the general group.

PGE₁요도좌제의 제조 및 평가

박소민,최명신,한규원,김길수 이화여자대학교 약학연구소 2005 藥學硏究論文集 Vol.- No.15

PGE₁is an endogenous substance of potent vasodialator as well as inhibitor of platelet aggregation. It has been used therapeutically in peripheral arterial occlusive disease and impotence. Intracavernous injection of PGE₁ for erectile dysfunction has been established for several years as a treatment option for erectile dysfunction of diverse etiologies, but this mode of administration is limited by penile discomfort, pain at the injection site, inconvenience and noncompliance. As the matter of worse, the β-hydroxy moiety of PGE₁is extremely susceptile to dehydration in solution to give inactive PGA₁ and PGB₁. For the improvement of stability, rapid absorption at action site and the convenience of application, PGE₁was formulated as urethral suppositories of three types of formulations, such as PEG, witepsol, and the mixture of PEG and witepsol. The stability test of PGE₁and the release test in urinary suppositories were performed. Futhermore, the effect fo enhancers and vehicle composition on the penetration of PGE₁through excised rat skin was evaluated by permeability coefficient and enhancement ratio.

Er:YAG 레이저를 이용한 치아삭제 효과

최남기,양규호,박상원,김옥준 大韓小兒齒科學會 2001 大韓小兒齒科學會誌 Vol.28 No.4

Er:YAG 레이저는 파장이 물의 주흡수 정점과 일치하는 2.94㎛의 방출파장을 가지기 때문에, 물분사를 하면서 사용했을 때, 다른 레이저보다 열손상은 더 작으면서 치아경조직을 보다 효과적으로 삭제한다고 알려져 있다. Er:YAG 레이저의 상아질 삭제 효과를 평가하고자 발거된 소구치와 대구치를 대상으로 상아질 시편을 제작하고 2.94㎛의 pulsed Er:YAG 레이저 (SDL-300EN, 삼성전자, 한국)를 handpiece형의 전달계를 이용한 비접촉식 방법으로, 물에 담궈진 시간과 레이저 조사시간에 따른 삭제량과 형태를 조사, 분석하여 다음과 같은 결과를 얻었다. 1. 건전 상아질에 대한 조사 결과 물에 담군 시간이 증가할수록 삭제율이 증가 하였다. 2. 건전 상아질과 우식 상아질에 150mJ, 10Hz의 조건으로, 30초간 레이저를 조사했을 때, 우식상아질에 비해 건전 상아질에서 surface irregularity가 증가하고 상아세관이 열리는 경향이 있었으며 crack이 관찰되었다. 또한 우식 상아질에 비해 많은 탄조각(ash flecks), crack이 관찰되었고 상아세관의 불연속성(inconsistency)이 관찰 되었다. 3. 우식 상아질에서 30초로 조사한 경우에서는 dark zone이 와동에 국한되어 나타났으며 작은 fleck들이 관찰되었고, 1분간 조사한 경우에서는 30초의 경우보다도 와동이 더 넓었으며, crack이 상아세관 주행방향과 직각으로 형성된 것을 관찰 할 수 있었다. 2분간 조사한 경우는 와동이 가장 넓었으며 crack이 더 많이 형성된 것을 볼 수 있었다. The purpose of this study was to evaluate the effects of Er:YAG laser on cutting efficacy and its histologic findings. Dentin specimens of human premolars and molars were used and irradiated by Er:YAG laser with noncontact handpiece type delivery system under different treatment condition of irradiation tiem. Cavity pattern and volume were evaluated to determine the cutting efficacy and following results were obtained. 1. Cutting volume of sound dentin was getting larger with time immersed in water increase 2. With the condition of irradiation (150mJ, 10Hz, 30sec), surface irregularity was more increased in sound dentin comparing to carious dentin. For the light microscopic examination, dentinal tubules were opened and ash flecks and cracks were noted with inconsistence of dentinal tubules. 3. In case of 30 sec, irradiation in carious dentin, dark zone was limited to small focus whereas 1 min, irradiation, more wider, and cracks were noted in the perpendicular to direction of dentinal tubules. For the 2 min, irradiation, cavity was the widest and more cracks were found.

펄스폭제어방식을 이용한 Switching Regulator에 관한 연구

박규태,윤형로,최승국 연세대학교 산업기술연구소 1981 논문집 Vol.13 No.2

본 논문에서는 Switching Regulator 내의 PWM 시스템에서의 위상지연과 스위칭소자의 지연에 의한 위상지연을 고찰하였고 출력필터의 연속전류모드와 불연속전류모드의 궤환에 의한 시스템의 특성을 분석하였다. 또한 Surge에 의한 Normal mode 잡음과 Ground 잡음전류에 의한 Common mode spike 잡음의 원인을 분석하고 그 대책을 강구하였으며 실제 스위칭 레귤레이터의 제작에 필요한 회로구성과 소자의 선정요건을 고찰하여 효율 82.6%, spike 잡음 10mvp-p 이내의 안정되고 특성이 우수한 레귤레이터를 설계하였다. The phase shift in PWM System due to the time delay in the switching elements has been studied. Employing the normal model, various performance characteristics of the converter for both continuous current operation and discontinuous current operation are compared. The normal mode noise generated by surge and common mode noise generated by ground noise current have been studied. To decrease the noise, several methods are introduced. Hardware circuits are built and in experimental measurements, it shows a high efficiency of 82.6% and low spike noise of 10mv p-p max.

응급의료센터에서 신경색의 조기진단

최경호,오동렬,이원재,박규남,박승현,황두영,김형국,정시경,김영민,김세경 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.4

To evaluate appropriate diagnostic studies for renal infartion in emergency medical center, we analysed 33 patients of renal infarction treated in this hospital for last 8 years. Eleven patients, 4 trauma associated and 7 aortic disease associated patients were excluded. They are 11 males and 11 females with a mean age of 51 years. Fourteen came to the emergency medical center and seven came to the outpatient department, in the other one patient renal infarction was developed during hospitalization with other disease. On their past history they had hypertension in 9, valvular heart disease in 5, and diabetic mellitus in 4 patients. Abdominal or flank pain was noted in 17 of 22(77%). The other symptoms were vomiting, nausea, fever and so on. On microscopic examination of initial urine in hospital, 5 patients showed more than 10 red blood cells by high power field examination. The mean lactic dehydrogenase level was 1,239 I.U/L(normal range 218-472 I.U/L), while the mean aspartate aminotransferase and mean alanine aminotransferase were 51 I.U/L(normal range 13-36 I.U/L) and 44 I.U/L(normal range 5-33 I.U/L). Abdominal ultrasonography showed positive findings in 5 of 16(31%), of which 3 were confirmed by Doppler ultrasonography. In 18, computed tomography was done and all those showed positive findings of renal infarction(100%). In conclusion, it is important that identify the elevated lactic dehdrogenase level in case of any suspicion about renal infarction and confirm by computed tomography.

광중합기 종류에 따른 복합레진과 콤포머의 미세누출에 관한 연구

박창후,최남기,양규호,김선미 대한소아치과학회 2006 大韓小兒齒科學會誌 Vol.33 No.3