• 한국수산과학회지
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• 제28권5호
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• pp.517-532
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• 1995

득량만내 동물플랑크톤의 분포를 연구하기 위하여 1992년 7월, 9월 그리고 1993년 1월, 3월에 걸쳐 득량만내 15개 정점 (3월은 14개)에서 채집된 동물플랑크톤을 조사하였다. 동물플랑크톤의 현존량은 3월에 가장 높았고, 7월에 가장 낮았으면, 출현 개체수는 9월에 가장 많았고 3월에 가장 적었다. 득량만에서의 현존량은 Sagitta crassa의 체장 변화에 의해 좌우되었다. 3월에 많이 출현한 S. crassa는 체장이 커서 현존량이 매우 높았다. 반면, 9월에는 작은 Noctiluca scintillans 다량 출현하였다. 득량만내 동물플랑크톤 종조성 및 출현 개체수는 수온의 계절변화에 영향을 많이 받았다. 주로 동물플랑크톤 분류군 중 7월에는 십각류 유생, 9월과 1월에는 요각류 그리고 3월에는 Coelenterates가 다량 출현하였다. 요각류중 7월과 3월에는 Paracalanus indicus, 9월에는 Acartia pacifica. 그리고 1월에는 Pseudodiaptomus marinus가 주요 종이었다.

• 한국수소및신에너지학회논문집
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• 제27권4호
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• pp.386-403
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• 2016

Biofuels produced from biomass can be substituted for petroleum fuels due to GHG reduction, sustainability and environmental friendly. The process technologies that convert biomass into biofuels are varied and depend on the feedstocks. Microalgae are considered to be one of the most promising alternative source to the conventional feedstocks for biofuel. Microalgae can be converted to biodiesel, bioethanol, biogas and biojet fuel via thermolchemical and biochemical production technologies. This reviews discusses recent advance in understanding the effects of the characteristics of various processes on the production of biofuels using microalgae. The performances of microalgae based biofuel are compared.

• 대한원격탐사학회지
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• 제19권1호
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• pp.11-19
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• 2003

This paper applies the Scan-Angle Method (SAM) to the Total Ozone Mapping Spectrometer (TOMS) aboard Earth Probe (EP) satellite for determining tropospheric ozone based on TOMS scan geometry. In the northern tropical Africa burning season, the distribution of the SAM-derived tropospheric ozone presents a tropospheric ozone enhancement related to biomass burning. This distribution is consistent with that of fire counts observed from Along Track Scanning Radiometer (ATSR) and that of carbon monoxide, the tropospheric ozone precursor, observed from Measurements of Pollution In The Troposphere (MOPITI). However, this feature is not shown in the distribution of tropospheric ozone derived from other TOMS-based algorithms for the northern burning season. In the high latitudes, the influence of pollution in the SAM results is seen over the northern continents in agreement with carbon monoxide for northern summer when the dynamical activity is weak in the northern hemisphere.

• International Journal of Advanced Culture Technology
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• 제6권2호
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• pp.129-136
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• 2018

Our present study, we impregnated Al-Fe-Mg-Si (NFM) nanocomposites having various concentrations 0, 1000, 3000, and 5000 mg/L in biomass in order to make carbonized biomass. We characterized the properties of the impregnated samples through thermogravimetric/differential thermal analysis (TG-DTA), pore distribution, scanning electron microscopy (SEM). The best results were observed for a NFM nanocomposites concentration of 5000 mg/L. After the first heat treatment, carbonization, and activation processes, the fixed carbon ratio and iodine adsorptivity were increased by 21.89% and 368 mg/g, 23.98% and 475 mg/g, 26.40% and 238 mg/g, respectively. The remove rate of malodorous and VOCs were that the sample shows good removal capabilities. From above results, our sample could be used for the removal of noxious and malodorous gases and for the purification of wastewater.

• Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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• 제3권1호
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• pp.1-9
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• 1999

Microzooplankton was analysed between $40^{\circ}s$ to $53^{\circ}s$S and $140^{\circ}E$ to $146^{\circ}E$ of the Sourthern Ocean from November 18 to November 30, 1995 to investigate the influence of frontal systems. The density and carbon biomass of microzooplankton were clearly associated with frontal systems, and at least 4 different communities were identified. The Subtropical Convergence Zone and Antarctic Polar Front Zone were the major biological boundaries recognized in the Southern Ocean. Ciliates predominated other microzooplankton in density and carbon biomass. Non-tintinnid ciliates occupied more than 70% of the total microzooplankton, and Laboea spp. was the major component of the non-tintinnid ciliates. The density and carbon biomass showed a decreasing tendency toward south from $40^{\circ}S$ to the $53^{\circ}S$ transect. The ecological importance of a frontal zone is confirmed by the microzooplanktonic data obtained from this study.

• 수산해양교육연구
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• 제22권3호
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• pp.330-340
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• 2010

This study was investigated the species composition of demersal fishes by a bottom trawler GAYA, in order to be used basic data for resources management of fishery in the jointly controlled waters of the East China sea. We caught 52 species, 1,167 individuals and 186.171kg in biomass in summer, and 1,924 individuals and 200.871kg in biomass in winter The first dominant species in individuals in summer was Glossanodon semifasciatus, and in biomass was Dentex tumifrons. But that in winter was Ovalipes punctatus in both individuals and biomass. It was a special phenomenon that crustacea was to be the first dominant species compared with general offshore fishery in Korea. Catch per unit effort (kg/hr) of bottom trawl in winter was higher than that in summer. There was also big difference by station in the diversity index, the evenness index and the dominant index.

• Journal of Plant Biology
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• 제33권4호
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• pp.225-236
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• 1990

Intertidal algal communities of Muchangpo and Maryangri in western coast of Korea were investigated qualitatively and quantitatively. Seasonal assessments of species composition, biomass, dominant species in biomass and vertical distributional pattern were conducted from July 1986 to April 1988. Ninety-nine species of marine algae (13 Cyanophyta, 12 Chlorophyta, 24 Phaeophyta and 50 Rhodophyta) were observed, of which 90 (13 Cyanophyta, 11 Chlorophyta, 23 Phaeophyta and 43 Rhodophyta) were from Muchangpo and 83 (10 Cyanophyta, 11 Chlorophyta, 21 Phaeophyta and 41 Rhodophyta) were from Maryangri, respectively. Ordination by detrended correspondence analysis based on the floristic data from nine localities indicated that, on the whole, marine algal distribution in western coast of Korea might be divided into two regions, i.e. the north and the south, being separated at the Taean Peninsula, the mid-western coast. Seasonal fluctuations of mean biomass were 44.55-201.19g-dry wt/$m^2$ at Muchangpo and 19.59-134.76g-dry wt/$m^2$ at Maryangri. Important species determined by the specific proportion of biomass were Sargassum thunbergii, Pelvetia siliquosa and Corallina pilulifera at Muchangpo, and Sargassum thunbergii and Corallina pilulifera at Maryangri.

• Journal of Microbiology and Biotechnology
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• 제14권6호
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• pp.1114-1119
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• 2004

The biofilms on pipe walls in water distribution systems are of interest since they can lead to chlorine demand, coliform growth, pipe corrosion, and water taste and odor problems. As such, the study described in this paper is part of an AWWARF and Tampa Bay Water tailored collaboration project to determine the effect of blending different source waters on the water quality in various distribution systems. The project was based on 18 independent pilot distribution systems (PDS), each being fed by a different water blend (7 finished waters blended in different proportions). The source waters compared were groundwater, surface water, and brackish water, which were treated in a variety of pilot distribution systems, including reverse osmosis (RO) (desalination), both membrane and chemical softening, and ozonation-biological activated carbon (BAC), resulting in a total of 7 different finished waters. The observations from this study consistently demonstrated that unlined ductile iron was more heavily colonized by a biomass than galvanized steel, lined ductile iron, and PVC (in that order) and that the fixed biomass accumulation was more influenced by the nature of the supporting material than by the water quality (including the secondary residual levels). However, although the bulk liquid water cultivable bacterial counts (i.e. heterotrophic plate counts or HPCs) did not increase with a greater biofilm accumulation, the results also suggested that high HPCs corresponded to a low disinfectant residual more than a high biofilm inventory. Furthermore, temperature was found to affect the biofilms, plus the AOC was important when the residual was between 0.6 and 2.0 mg $Cl_2/l$. An additional aspect of the current study was that the potential of the exoproteolytic activity (PEPA) technique was used along with a traditional so-called destructive technique in which the biofilm was scrapped off the coupon surface, resuspended, and cultivated on an R2A agar. Both techniques indicated similar trends and relative comparisons among the PDSs, yet the culturable biofilm values for the traditional method were several orders of magnitude lower than the PEPA values.

• 한국수산과학회지
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• 제27권5호
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• pp.659-672
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• 1994

진해만의 저서동물 군집에 대해 Sanders(1968)의 희박법(Rarefaction method), Warwick(1986)의 개체수-생물량 비교법(Abundance-Biomass Comparison method), Gray(1979)의 대수-정규분포 응용법 (Log-Normal Distribution method) 및 Frontier(1985)의 순위-빈도 곡선법 (Rank-Frequency Diagram method) 등의 환경 평가 기법을 이용하여 진해만의 오염정도를 평가하였다. 이 방법들 가운데 개체수-생물량 비교법은 오염해역에 개체당 생물량이 큰 이매패류인 Periglypta cf. puerpera와 Macoma tokyoensis와 다모류인 Nectoneanthes multignatha가 출현함으로서 이 방법의 원리에서 요구하는 전제 조건을 잘 반영하지 못하였다. 그러나 나머지 3가지 방법은 진해만의 환경을 잘 반영하고 있었으며, 가장 내만에 위치한 Group-I이 가장 오염된 해역으로 나타났으며 진해만 중앙부 해역인 Group-II도 상당히 오염이 진행된 것으로 나타났다. 그러나 진해만 입구인 Group-III과 VI는 내만 해역에 비해 상대적으로 오염의 영향이 적은 것으로 나타났다. 이러한 방법들 가운데 종별 개체수 자료만을 필요로 하는 대수-정규 분포 응용법이 오염을 평가하는데 가장 편리하고 적합한 것으로 판단되며, 그 밖의 희박법 및 순위-빈도 곡선도 상대적 평가 방법으로는 유익한 수단이 된다. 우리나라의 다른 해역에서의 오염평가도 저서동물의 분포특성을 이용한 이러한 다양한 환경평가 기법을 시도해 보는 것이 바람직할 것으로 생각된다.

• 농업생명과학연구
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• 제53권2호
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• pp.65-75
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• 2019

Stem and root of elm trees have used as traditional medical materials, but there is little information on the distribution and resources of habitats. Korean native growing Ulmus spp. (U. davidiana var. Japonica, U. parvifolia, U. davidiana, and U. macrocarpa) genetic resources studied through The National Forest Inventory of Korea data and field survey. The distributions of U. davidiana var. japonica according to elevation distributed evenly. Both U. parvifolia and U. davidiana were inhabited mostly at less than 200 m of altitude. Each Ulmaceae species widely were distributed nationwide, but a dominant species was different depending on locals. It observed that Ulmaceae inhabits mainly in steep slopes of 31-45 degrees. Most of the habitats regenerated by natural seeding and the most abundant species were a codominant tree. Distribution of trees in U davidiana var. japonica was 7 m-13 m, and in young U. parvifolia and U. macrocarpa, more than 25% of young trees less than 7 m observed. The distribution of the diameter of breast height of the U. davidiana var. japonica was 46.4% for 11-20 cm, 52.6% for 11-20 cm in U. parvifolia. The average T/R ratio was 0.83, and the mean weight ratio of root bark was 62%. As the results of this study, the domestic Ulmaceae biomassare very small. It is difficult to harvest in that the habitat on the slope. Thus, it is too hard to develop functional materials using biomass at present. Therefore, it is necessary to develop technology for the selection and propagation of elite trees of Ulmaceae.