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애기다시마 식물의 미세구조 연구. : Ⅰ. 고정액 조성 I. Composition of Fixatives
정익교 부산대학교 기초과학연구소 1990 부산대학교 기초과학연구소 연구논문집 Vol.10 No.-
There have been many problems like plasmolysis in the ultrastructural studies with kelps. The present study was conducted with series of different fixatives and buffer solutions and several resins to solve the plasmolysis phenomena. The fixative of 1470 mosmol(3% glutaraldehyde. 2.4% paraformaldehyde in 0.05M cacodylate buffer with 0.2M sucrose and 0.5% caffeine at pH of 7.2) showed the least frequency of plasmolysis. The relationshiop between the concentration of primary fixatives and the frequency of plasmolysis was not found. With above fixative the possibility of Generally, the kelp (Laminaria religiosa) contains as lot of mucilage, which interupts the infiltration of fixative. The posiible physiological mechanisms related with mucilage secretion may be unable to fix region of plasmalemma properly.
The Effects of Heavy Metals in Seaweeds
Chung, Ik Kyo,Lee, Jin Ae 부산대학교 기초과학연구소 1990 부산대학교 기초과학연구소 연구논문집 Vol.10 No.-
The present brief review focuses on some toxic effects of heavy metals in seaweeds. There have not been much studies on the effects of heavy metals in seaweeds. However, their effects are significant on their growth rate, morphology and other metabolic processes. Therefore, the possible impacts on the coastal community with respect to the primary productivity and the energy flow should not be underestimated. Seaweeds are able to accumulate some metals without any toxic effects. The uptake of some metal species in seaweeds has been explained by the adsorption/ion-exchange mechanism of various polysaccharides like alginate, the energy required processes, and other kinetic models. Some seaweeds have been considered as indicators of heavy metal pollution because of their capability of accumulation. Comprehensive biological studies of suitable species and their tissue contents of heavy metals should be prerequisite background for the implication of those species as bioindicators The concentrations of heavy metals(Cd,Cu,Zn,Pb,Fe,Cr,Co,Ni,Hg,As,Sr)in seaweeds of 33(including 6 unidentified) species of Chlorophyta, 50 (11) of Rhodophyta and 73(14) of Phaeophyta are listed in this review. Among these Enteromorpha, Ulva, Gracilaria, Polysiphonia, Ascophyllum, Fucus, Laminaria and Sargassum are frequently reported algal species.
Chung, Ik Kyo,Oak, Jung Hyun,Lee, Jin Ae,Shin, Jong Ahm,Kim, Jong Gyu,Park, Kwang-Seok Oxford University Press 2013 ICES journal of marine science Vol.70 No.5
<P> Seaweed beds can serve as a significant carbon dioxide (CO<SUB>2</SUB>) sink while also satisfying global needs for food, fodder, fuel, and pharmaceutical products. The goal of our Korean Project has been to develop new baseline and monitoring methodologies for mitigation and adaptation within the context of climate change. Using innovative research approaches, we have established the Coastal CO<SUB>2</SUB> Removal Belt (CCRB), which comprises both natural and man-made plant communities in the coastal region of southern Korea. Implemented on various spatial–temporal scales, this scheme promotes the removal of CO<SUB>2</SUB> via marine forests. For example, when populated with the perennial brown alga <I>Ecklonia</I>, a pilot CCRB farm can draw down ∼10 t of CO<SUB>2</SUB> per ha per year. This success is manifested by an increment in biomass accumulations and a decrease in the amount of dissolved inorganic carbon in the water column.</P>
Application of Seaweed Cultivation to the Bioremediation of Nutrient-Rich Effluent
Chung, Ik-Kyo,Kang, Yun-Hee,Charles Yarish,George P. Kraemer,Lee, Jin-Ae The Korean Society of Phycology 2002 ALGAE Vol.17 No.3
A seaweed biofilter/production system of being developed to reduce the environmental impact of marine fish farm effluent in coastal ecosystems as a part of an integrated aquaculture system. Several known seaweed taxa and their cultivars have been considered as candidate biofilter organisms based on their species-specific physiological properties such as nutrient uptake kinetics and their economic value. Porphyra is an excellent cadidate and shows efficient nutrient extraction properties. Rates of ammonium uptake were maintained at around 3 ${\mu}moles{\cdot}g{\cdot}dw^{-1}{\cdot}min^{-1}$ at 150 ${\mu}M$ inorganic nitrogen at $10^{\circ}C$. Ulva is another possible biofilter candidate with an uptake rate of 1.9 ${\mu}moles{\cdot}g{\cdot}dw^{-1}{\cdot}min^{-1}$ under same conditions. A simple uptake/growth and harvest model was applied to estimate the efficiency of the biofilter/production system. The model was deterministic and used a compartment model structure based on difference equations. The efficiency of Porpyra filter was estimated over 17% of ${NH_4}^+$ removal from the contimuous supply of 100 ${\mu}mole{\cdot}l^{-1}\;{NH_4}^+\;at\;100l{\cdot}sec^{-1}$ flow rate.