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金鍾煥,沈雲澤,李泰淑,芮旻海,崔東河,朴元學 충남대학교 의과대학 지역사회의학연구소 1975 충남의대잡지 Vol.2 No.1
A study on morphology and periodicity of microfilariae was carried out in the area surveyed, Chung Cheong-nam Do. 1. The measurements of microfilariae from the Giemsa stanined thick film were made; and they showed that body length was 186.0(156-245)μ, maximum width 5.0(4-6)μ, and cephalic space length by width 1.5:1, per cent distance from anterior end to: cephalic space 4.21, nervering 22.87, excretory pore 31.35, excretory cell 38.85, G_1 cell 53.77, anal pore 82.04, from the last nucleus of posterior end to : the last 2nd nucleus 2.56, and the posterior body nucleus 4.69μ, respectively. 2. The periodicity of the micofilaria counts in peripheral blood of a man was observed, and it was found that the characteristic nocturnal periodicity was seen from in the case. The peak of microfilaria counts showed between 12 p.m. and 4 a.m. 3. When stained with Giemsa solution, 15.9% of microfilariae shed their sheath. As a result of the above findings the microfilariae might be identified Brugia malayi.
忠南錦江流域住民의 絲狀蟲에 關한 疫學的 調査硏究(第1報)
金鍾煥,沈雲澤,李泰淑,芮旻海,崔東河,朴元學 충남대학교 의과대학 지역사회의학연구소 1974 충남의대잡지 Vol.1 No.1
During June to November 1974, a survey of 1,749 (male 907, female 842) inhabitants for filariasis was made in several areas, Chung Cheong-nam Do, and the results are summerized as follows; 1. The positive rate of microfilaria was 0.17 per cent from Gongju(2 cases) and Ganggyeong(1 case), however no positive case of microfilaria was found in the inhabitants of Seosan area. 2. The microfilaria in per 20 cmm of blood showed lower density and it was about four worms. 3. 301 households in the surveyed areas were subjected for the survey releated with filariasis by the questionnaire. The family member of 172(57.1%) households showed 5 to 8 persons, agriculture 68.4%, and 71.8% of households lived more than 20 years in the same village. 4. 56.9% of household showed the protection from the mosquito biting with mosquito net or insecticides spray and 49.8% of residents knew the "Sudung-dari" dialet for elephantiasis, however some of them were missunderstood the cause of elephantiasis.
Cytoskeletal Patterns, In Vitro Maturation and Parthenogenetic Development of Rabbit GV Oocytes
Ju, J.C.,Chen, T.H.,Tseng, J.K.,Tsay, C.,Yeh, S.P.,Chou, P.C.,Chen, C.H.,Liu, C.T. Asian Australasian Association of Animal Productio 2002 Animal Bioscience Vol.15 No.12
The purposes of this study were to optimize the in vitro maturation (IVM) and culture (IVC) systems of rabbit oocytes. Cytoskeletal structures in the germinal vesicle stage (GV) and during IVM are also investigated. Ovaries were transported from local slaughterhouses and the cumulus-oocyte complexes (COCs) were collected from ovarian follicles (${\geq}1mm$). COCs were randomly allocated to TCM199-based medium ($T_1$, TCM-199) supplemented with $NaHCO_3$, glucose, sodium pyruvate and FSH ($T_2$), $T_2+E_2+LH$ ($T_3$), $T_3+FBS$ ($T_4$), or $T_1+E_2+LH+FSH+FBS$ ($T_5$), for IVM. In Experiment 1, COCs were retrieved from the follicles and 51 GV oocytes were fixed in the fixative (MTSB-XF) for nuclear and cytoplasmic examinations. In Experiment 2, progressive changes of both the nucleus and the cytoskeleton were examined at 0, 6, 16, and 20 h after IVM. Maturation (MR) and developmental rates were assessed in Experiment 3. Cytoplasmic microtubules (MT) were clearly observed in rabbit GV oocytes. To our knowledge, this is the first report that describes the appearance of MT structures in the GV stage ooplasm. Tremendous variations in cytoskeletal alterations were observed among treatments with the exception of the vitelline ring (VR), which is constantly visible and unchanged during maturation. Germinal vesicle breakdown (GVBD) does not occur at 6 h after onset of maturation culture. When the oocytes for IVM were collected within 2 h, results from Experiment 3 showed that rates of nuclear maturation were 42, 8, 42, 37 and 65% at 16 h of IVM for $T_1$ through $T_5$, respectively, in which $T_1$, $T_4$ and $T_5$ had significantly greater MR than those in other groups (p<0.05). Morula/blastocyst development after parthenogenetic activation ranged from 20 to 63% with significantly greater rates in $T_3$, $T_4$ and $T_5$ (p<0.05). These results suggested that oocytes recovered from slaughterhouse ovaries can be matured and parthenogenetically activated in vitro, but the MR remained low in this study. Addition of $E_2$ and LH in the medium may be beneficial for cytoplasmic maturation, but FBS exerts a nega- tive role in the subsequent development of parthenogenetic embryos when energy substrates are provided in the IVC media. More studies are required for improving the MR and further development of the GV stage rabbit oocytes.
Yeh, S.P.,Ju, J.C.,Tseng, J.K.,Chou, P.C.,Chen, C.H.,Chih, T.,Fan, Y.K. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.2
The objectives of this study were to investigate the ovarian responsiveness of juvenile calves to exogenous gonadotropin treatments and to establish the oocyte retrieval technique for prepubertal heifers. Three 78-day-old calves were treated with 4 doses (40, 30, 30 and 30 mg) of FSH (Folltropin V) at 12 h interval up to 229 day-old. Surgical oocyte retrieval was performed 24 h after the last injection of FSH. Calves with good ovarian responses to FSH treatment had an average ovarian size of $5{\times}3$ cm compared to $3{\times}2$ cm in the less-responsive animals. Large variations were observed in the number of total follicles ($51{\pm}45$), aspirated follicles ($39{\pm}36$), oocytes recovered ($23{\pm}25$) and usable oocytes recovered ($11{\pm}19$) during 78 to 229 day-old. Oocytes derived from prepubertal calves had significantly lower maturation rate than those from cows (34 vs. 100%, p<0.05). Mean diameters of calf oocytes ($144{\pm}1{\mu}m$) and ooplasm ($110{\pm}1 {\mu}m$) were significantly lower than those of cows ($149{\pm}1$ and $25{\pm}1{\mu}m$, respectively). The diameter of the ooplasm also increased significantly after in vitro maturation (IVM) ($108{\pm}1$ vs. $112{\pm}1{\mu}m$). However, further studies are required to optimize the IVP system for the oocytes derived from prepubertal heifers.
( Siah Kewin T H ),( Rahman M Masudur ),( Ong Andrew M L ),( Soh Alex Y S ),( Lee Yeong Yeh ),( Xiao Yinglian ),( Sachdeva Sanjeev ),( Jung Kee Wook ),( Wang Yen-Po ),( Oshima Tadayuki ),( Patcharatra 대한소화기기능성질환·운동학회 2020 Journal of Neurogastroenterology and Motility (JNM Vol.26 No.3
During the Coronavirus Disease 2019 (COVID-19) pandemic, practices of gastrointestinal procedures within the digestive tract require special precautions due to the risk of contraction of severe acute respiratoy syndrome coronavirus-2 (SARS-CoV-2) infection. Many procedures in the gastrointestinal motility laboratory may be considered moderate to high-risk for viral transmission. Healthcare staff working in gastrointestinal motility laboratories are frequently exposed to splashes, air droplets, mucus, or saliva during the procedures. Moreover, some are aerosol-generating and thus have a high risk of viral transmission. There are multiple guidelines on the practices of gastrointestinal endoscopy during this pandemic. However, such guidelines are still lacking and urgently needed for the practice of gastrointestinal motility laboratories. Hence, the Asian Neurogastroenterology and Motility Association had organized a group of gastrointestinal motility experts and infectious disease specialists to produce a position statement paper based-on current available evidence and consensus opinion with aims to provide a clear guidance on the practices of gastrointestinal motility laboratories during the COVID-19 pandemic. This guideline covers a wide range of topics on gastrointestinal motility activities from scheduling a motility test, the precautions at different steps of the procedure to disinfection for the safety and well-being of the patients and the healthcare workers. These practices may vary in different countries depending on the stages of the pandemic, local or institutional policy, and the availability of healthcare resources. This guideline is useful when the transmission rate of SARS-CoV-2 is high. It may change rapidly depending on the situation of the epidemic and when new evidence becomes available. (J Neurogastroenterol Motil 2020;26:299-310)
Chiou, C.M.,Yang, T.S.,Yeh, S.P.,Tsai, M.Z.,Cheng, S.P.,Huang, M.C. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.12
The follicles (1.8 to 7.8 mm in diameter) were recovered from the ovaries in marketed pigs and the number of granulosa cells, the diameter of oocytes obtained from different development stages of the follicles and follicular fluid levels were determined. Correlations between size measurements and cell counts as well as the diameter of antral follicles and oocytes were also investigated. The results indicated that, while expanding in size, follicle numbers decreased with a greater atretic proportion. Granulosa cells increased in numbers continuously and remained unchanged beyond the size of 200 ${mm}^3$ in non-atretic follicles, whereas a sudden drop of granulosa counts was observed in atretic follicles. Follicular fluid, on the other hand, linearly increased its volume with follicle size and differed little between those of non-atretic and atretic follicles. Diameters of oocytes in non-atretic follicles increased to its maximum when follicles expanded to 150 ${mm}^3$ and maintained its size during later follicular expansion. It is concluded that, for in vitro culture, the optimal size of porcine follicle should be between 150 to 180 ${mm}^3$if they are collected from pre-pubertal gilts of marketing size slaughtered in an abattoir.
H.Y. Wang,C.L. Hwang,S.T. Yeh 사단법인 한국계산역학회 2012 Computers and Concrete, An International Journal Vol.10 No.1
The performance of a concrete is significantly influenced by its mixture proportion and the coating thickness on aggregate surface. The concrete in this study is designed by estimating the blending ratio of aggregate using a densified mixture design algorithm (DMDA) based on an ideal grading curve and estimating the paste volume as the sum of the amount of paste needed to provide an assigned coating paste thickness. So as to obtain appropriate concrete amount, and thus can accurately estimate the property of concrete. Deduction of this mix design formula is simple and easy understanding, and meanwhile to obtain result is fast. This estimation model of mix design is expected to reward to industry and effectively upgrade concrete quality.