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김재홍,손희정,김장호,김수생,서정민 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.2
This study was carried out two point view that reuse of sludge and adsorption of benzene, toluene and o-xylene of VOCs in cast, carbonized cast and activated carbon. The cation exchange capacity of cast and carbonized cast were 59.2, 112 meq/l00g, respectively. The specific surface were 560, 800 ㎡/g, respectively. The average removal rates of benzene by 50g cast of 50% hydrous cast, anhydrous cast, carbonized cast, activated carbon were 15.0, 41.2, 88.2, 99.4% in 60min retention time. The average removal rates of toluene by 50g cast of 50% hydrous cast, anhydrous cast, carbonized cast, activated carbon were 12.5, 34.2, 88.2, 99.5% in 60min retention time. The average removal rates of o-xylene 50g cast of 50% hydrous cast, anhydrous cast, carbonized cast, activated carbon were 8.8, 28.5, 84.8, 98.1% in 60min retention time. The adsorption efficiency of test absorbent was in order of benzene > toluene > o-xylene.
林哉明,金秀生,李賢珠 동아대학교 환경문제연구소 1986 硏究報告 Vol.9 No.1
This study was performed for composting of septic tank sludge by batch type enclosed composter. The conditions of each element were the mixed rate 0.5:1∼4:1 of septic tank sludge rice-polishing, initial Moisture Content rate of 50 to 70%, C/N ratio of 8 to 43, and 0.25∼1.51/min·㎏ per volatile solids of Air Quantity. The results of this experiment are as follows: (1) The condition of the most successful composting was mixed rate 2.1 of septic tank sludge and rice-polishings in each sample. (2) The range of the optimum moisture content was 60∼65% simultaneously, mixed rate was 2:1-3:1 the temperature of compost pile for hygienic stabilization was sustained for minimum seven days. (3) The range of optimum C/N ratio 30∼35 showed the fastest and most successful composting . (4) 0.25 l/min-㎏ VS Air Quantity was the optimum of composting. (5) In a day or two, the maximum temperature of 48∼54℃ showed that after inputing composter under the adequate condition of each element: Moisture Content, Air Quantity, pH, C/N ratio etc. The maximum CO₂ production quantity with temperature variation was 8∼11% at 44∼50℃.
주재수,김종세,조광필,김생곤 조선대학교 부설 유전생물공학연구소 1992 유전생물공학연구지 Vol.2 No.-
The epithelia of epididymis are composed of principal cells, basal cells, light cells and narrow cells. The principal cells are secretory cells that Golgi complex and rough endoplasmic reticulum were well developed in the cytoplasm. The light cells are secretory cells which exist in the corpus and cauda of the epididymis. It is observed the number of secretory granules in the cytoplasm. The basal cells are situated on the basal membrane. In proportions to cytoplasm, it has large nucleus and. a few cell organelles exist in the cytoplasm. The narrow cells have several secretory vesicles and electron-dense cytoplasm. It is suggested that narrow cells are degenerating cells.
양회생,이은주,김종호,최석철,심재철 동국대학교 경주대학 1999 東國論集 Vol.18 No.-
One of the contributory causes to poor pregnancy rates in assisted reproduction has been the decreased viability of transferred embryos and the transfer of four-cell embryos into and environment that naturally would be receptive only to 5-day-old blastocysts. In this paper, we have reviewed on the role of helper cells(cocultures) to mimic the in vivo, environment to bring about improved embryo quality and an increased number of blastocysts for replacement in IVF patients. The behavior of helper cell is first presented, followed by their use as cocultures for fertilization and cleavage of embryos. The mode of action and specificity of helper cells are also discussed. The currently available results of pregnancies after cocultures are presented together with future aspects of research that are necessary to refine the coculture system, The ultimate aim is to mimic in vivo conditions in vitro, so that at least the pregnancy rates of assisted conception can be parallel to normal fecundity in the human. Therefore, a very attractive future includes the freezing of blastocysts generated from coculture, thawing, and replacing them in natural cycles.