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손문호,권오섭,문병용,정익교,이춘환,이진애,Son, Moon-Ho,Zulfugarov, Ismayil S.,Kwon, O-Seob,Moon, Byoung-Young,Chung, Ik-Kyo,Lee, Choon-Hwan,Lee, Jin-Ae 한국조류학회(藻類) 2005 ALGAE Vol.20 No.2
The freshwater blooms mainly blue-green algal blooms occur frequently in the lower Naktong River in summer, which provoke many socio-economical problems; therefore, the early detection of bloom events are demanding through the quantitative and qualitative analyses of blue green algal species. The in vivo fluorescence properties of cultured strains of Microcystis aeruginosa, M. viridis, M. wesenbergii, M. ichthyoblabe, Anabaena cylindrica, A. flos-aquae, and Synedra sp. were investigated. Wild phytoplankton communities of the lower Naktong River were also monitored at four stations in terms of their standing stocks, biomass and fluorescence properties compared with its absorption spectram. The 77K fluorescence emission spectra of each cultured strains normalized at 620 nm was very specific and enabled to detect of blue green algal biomass qualitatively and quantitatively. The relative chlorophyll a concentration determined by chlorophyll fluorescence analysis method showed significant relationship with chlorophyll a concentration determined by solvent extraction method ($R^2$ = 0.906), and the blue-green algal cell number determined by microscopic observation ($R^2$ = 0.588), which gives insight into applications to early detection of blue green algal bloom.
광양만과 진해만에서 대장균 Escherichia coli분포와 수질오염 특성
손문호 ( Moon Ho Son ),백승호 ( Seung Ho Baek ),주혜미 ( Hae Mi Joo ),장풍국 ( Pung Guk Jang ),김영옥 ( Young Ok Kim ) 한국환경생물학회 2011 환경생물 : 환경생물학회지 Vol.29 No.3
In order to assess the inorganic and organic pollutents characteristics in marine water, we investigated COD (Chemical Oxygen Demand), Chlorophyll a and Escherichia coli during four seasons at 20 stations of Gwangyang Bay and at 23 stations of Jinhae Bay, Korea. The bay is divided into three zones in Gwangyang and four zones in Jinhae respectively, based on the pollutent levels. In Gwangyang Bay, the high concentration (mean 4.7 mg L 1) of COD was recorded during spring season at Zone I, which can be characterized as a semi enclosed eutrophic area (St. 1~9). Also, Chl. a concentrations were high at Zone I (mean 14.0 μg L 1). The colony of E. coli were detected during summer season at Zone II, which is influenced by Seomjin River water. The E. coli may have been entered from the river water in a large pulse during rainy season. On the other hand, E. coli was kept low levels during four seasons at the Zone III, which is influenced indirectly by surface water currents from offshore of the bay. In Jinhae Bay, the high COD and Chl. a were shown during all seasons at Zone I, which is characteristed by semi enclosed eutrophic area of Masan and Haengam bays. The Zone I also had been shown relatively high E. coli concentration in all seasons. In constrast, other three zones did not show seasonal characteristics of the E. coli concentrations. The present study suggests that E. coli concentrations can be significantly elevated in eutrophic semi enclosed area.
진해만에서 춘계와 하계 성층기간 동안 환경요인과 식물플랑크톤 군집구조의 관계
손문호 ( Moon Ho Son ),현봉길 ( Bong Gil Hyun ),김동선 ( Dong Sun Kim ),최현우 ( Hyun Woo Choi ),김영옥 ( Young Ok Kim ),백승호 ( Seung Ho Baek ) 한국환경생물학회 2012 환경생물 : 환경생물학회지 Vol.30 No.3
We surveyed 23 sites of Jinhae Bay in spring and summer 2010 in order to study the correlation between the variation of environmental factors, including salinity, temperature, and nutrients and the characteristics of phytoplankton community structures in summer stratification. Phytoplankton biomass was high in the surface water in summer; however, it was very low in the bottom water. The results showed a negative correlation between chlorophyll a (chl. a) and nutrients (silicate, nitrate, nitrite, ammonium, and phosphate) or nutrients ratio in summer; however, there was mostly a positive correlation between chl. a and these nutrients in spring. This inconsistent correlation between spring and summer was attributed to the phytoplankton community, because a diverse phytoplankton community has different nutrient uptake abilities. In addition, the results of CCA (canonical correspondence analysis) showed a negative correlation between phosphate and dominant species, including Chaetoceros spp., Skeletonema costatum-like spp., and Pseudo-nitzschia delicatissima in summer, but a strong positive correlation between DIN (dissolved inorganic nitrogen) and the dominant species, including Cryptomonas spp. and Pseudo-nitzschia multistriata in spring. Consistently, the dominant algal species in summer showed a relatively smaller size cells compared with those in spring, suggested that it may have related with the low nutrient levels at surface layer due to strong stratified water column of summer.
연안해역에서 인공부착기질을 이용한 부착미세조류 모니터링기법 -유류오염의 생태위해성 평가적용-
백승호 ( Seung Ho Baek ),손문호 ( Moon Ho Son ),정승원 ( Seung Won Jung ),강정훈 ( Jung Hoon Kang ),김영옥 ( Young Ok Kim ),심원준 ( Won Joon Shim ) 한국환경생물학회 2012 환경생물 : 환경생물학회지 Vol.30 No.1
Abstract - Spills of M/V Hebei Spirit on 7th December 2007 caused a seriously damage to the ecosystem of Korean coast. Of these, microbial communities (i.e., attached benthic micro-algae) were reported to be sentive to the environmental change so it can be used for ecological risk assessment. Our experiment was designed to examine the ecological risk assessments for oil pollutant using benthic attached algal community on the artificial substrates of acrylic plates. Field monitoring in the culture system was conducted in Jangmok Bay. The abundances of attached micro-algae on artificial substrates gradually increased with increasing of sampling times. Among them, diatoms were the most important colonizer of coastal water, with the genera Cylindrotheca and Navicular most abundant. In particular, developed the culture system has correctly measured qualitative and quantitative abundance of attached micro-algae because same acrylic plates as artificial substrates were used. Thus, this culture system may be directly applied to the ecological risk experiments of microbial community structure from oil pollutants.
해양적조생물제어를 위한 살조물질 Thiazolidinedione 유도체(TD49) 평가
백승호,장민철,주혜미,손문호,조훈,김영옥,Baek, Seung-Ho,Jang, Min-Chul,Joo, Hae-Mi,Son, Moon-Ho,Cho, Hoon,Kim, Young-Ok 한국해양학회 2012 바다 Vol.17 No.1
전세계적으로 연안해역에서 확산되고 있는 유해유독성 식물플랑크톤의 대발생은 수산자원생물자원에 심각한 피해를 입힌다. 본 연구에서는 유해성 미세조류 대발생을 제어하기 위해 개발된 신물질 Thiazolidinedione 유도체(TD49)의 살조능을 유해성 미세조류 성장단계(초기성장기, 대수증식기, 안정기)에 따라 조사하였다. TD49는 $Heterosigma$ $akashiwo$, $Chattonella$ $marina$ 그리고 $Chattonella$ sp.의 세포를 사멸시켰으며, 특히 낮은 농도($0.02{\mu}M$)의 TD49는 대수증식기와 안정기보다 초기 성장기에서 우수한 살조효과를 보였다. 또한 모든 성장단계에서 유해생물을 제어 할 수 있는 TD49의 농도는 $2{\mu}M$로 측정되었다. 무각 편모조류인 $Heterosigma$ $akashiwo$, $Chattonella$ $marina$ 그리고 $Chattonella$ sp.은 세포벽이 약하여 TD49물질에 의해 세포가 쉽게 파괴되어 우수한 살조효과를 보였다. 결과적으로 본 연구에서 개발된 Thiazolidinedione 유도체(TD49)는 유해적조생물 $H.$ $akashiwo$, $C.$ $marina$ 그리고 $Chattonella$ sp.를 제어할 수 있는 우수한 물질로 판단되었으나, 추후 현장 실용을 위해 메소코즘과 같은 인공생태계를 이용한 해양생태계 위해성 평가가 체계적으로 추진되어야 한다. Worldwide development of harmful algal blooms causes serious problem for public health and fisheries industries. To evaluate the algicidal impact on the harmful algae bloom species in aquatic ecosystems of coast, a new algicide thiazolidinedione derivative (TD49) were tentatively examined in the growth stages (i.e., lag, logarithmic and stationary phase) of rapidophyceae $Heterosigma$ $akashiwo$, $Chattonella$ $marina$ and $Chattonella$ sp..Three strains could easily destroy in the lag phase due to relatively weak cell walls than those of the logarithmic and stationary phase. It is thought that inoculation of TD49 substances into initial or developmental natural blooms with a threshold concentration ($2{\mu}M$) can maximize the algicidal activity. Also, bio-chemical assays revealed that the algicidal substances from all culture strains were likely to be extracellular substances because those cells have easily destroyed in cell walls. On the other hand, natural zooplankton communities were influenced within the exposure experiments of $2{\mu}M$, which is showed the maximum algcidal activity of tested organisms. These results indicate that although the TD49 substance is potential agents for the control of $H.$ $akashiwo$, $C.$ $marina$ and $Chattonella$ sp. in the enclosed eutrophic bay and coastal water, more detailed research of acute toxicity effect on high trophic organism in marine ecosystems need to be conducted.
새로운 캅사이신 유도체 DA-5018 의 진통활성 기전연구 Substance P 관련성
손미원(Mi Won Son),손문호(Moon Ho Son),배은주(Eun Ju Bae),김순회(Soon Hoe Kim),김원배(Won Bae Kim),양중익(Junn Ick Yang) 한국응용약물학회 1997 Biomolecules & Therapeutics(구 응용약물학회지) Vol.5 No.1
Capsaicin is known to be an analgesic agent, affecting the synthesis, storage, transport and release of substance P, the principal neurotransmitter of pain from periphery to the central nervous system(CNS). DA-5018, a newly synthesized capsaicin derivative has shown potent analgesic effect comparable to that of morphine in various rat models of experimentally induced acute pain. In this study the mechanism of analgesic activity of DA-5018 was examined. First, the electrically-evoked contraction of guinea pig trachea was inhibited by DA-5018 and these inhibition was recovered by incubation with capsazepine(3 ,μM), capsaicin receptor antagonist and this result suggested that DA-5018 has affinity on capsaicin receptor. The correlation between the norciceptive threshold and the release of substance P was evaluated. In vitro perfusion of slices of the rat spinal cord with DA-5018(10, 100 μM) produced a significant increase of the release of substance P and this increase was less than that of capsaicin(10 μM). The norciceptive threshold of rat treated with DA-5018(1 mg/ kg, p.o) in tail pinch test increased from 2.9±0.3 to 23.5±6.61. Tail pinch latency increased to a maximun at 15 min after DA-5018 treatment and then declined to control values by 120 min. The capsaicin-evoked release of substance P from the spinal cord slices of rat treated with DA-5018 reduced from 2.38±0.79 to 0.69±0.26 pg/mg wet weight. This reduction reached to a minium at 15 min after DA-5018 treatment and then recovered to control value by 120 min. These results mean that analgesic activity of DA-5018 is due to release of substance P. The effect of DA-5018 cream on electrically-evoked neurogenic inflammation of rat saphenous nerve was compared with capsaicin (zostrix-HP). DA-5018 showed 34% inhibition of the neurogenic extravasation while capsaicin showed significant 67% inhibition. This result indicates that the potency of DA5018 in the release of substance P is less than that of capsaicin. These results suggest that the release of substance P is partially involved in the mechanism of analgesic action of DA-5018.
새로운 캅사이신 유도체 DA-5018 의 진통활성 기전연구 Opiate 수용체 및 Prostanoid 와의 상관성
손미원(Mi Won Son),손문호(Moon Ho Son),배은주(Eun Ju Bae),김순회(Soon Hoe Kim),김원배(Won Bae Kim),양중익(Junn Ick Yang) 한국응용약물학회 1997 Biomolecules & Therapeutics(구 응용약물학회지) Vol.5 No.1
DA-5018, a new capsaicin derivative, showed potent analgesic effect comparable to that of morphine in various experimental acute pain models. In this study, whether the analgesic mechanism of DA-5018 is related to opiate receptors or prostanoids was investigated. The affinity of DA-5018 for opiate receptor was determined by receptor binding assay. The Ki values of DA-5018 for nonspecific and specific μ, k, δ-opiate receptor was 299±8.88, 735±215, 2930±163, 1550±813 nM, respectively and DA-5018 exhibited lower affinity than morphine. DA-5018 (10^(-9)∼3 x 10^(-5) M) inhibited electrically-evoked contractions of the guinea pig ileum and rat vas deferens, and these inhibition was not antagonized by naloxone(10 nM), an opiate receptor antagonist. Antagonism of analgesic effect of DA-5018 by naloxone was examined by tail pinch test. Analgesic action of DA-5018(0.1∼2 mg/kg, s.c.) was not antagonized by naloxone(1 mg/㎍, i.p.). These results indicate that pharmacological action of DA-5018 is not related with opiate receptor. Cyclooxygenase and 5-lipoxygenase activities in rat peritoneal neutrophil treated with A23187 and arachidonic acid were measured by radioimmunoassay. DA-5018 stimulated the cyclooxygenase activity and the concentration showing the two fold increase of activity was 124 μM. DA-5018 slightly inhibited 5-lipoxygenase activity and these results together indicate that analgesic action of DA-5018 is not mediated through inhibition of cyclooxygenase or lipoxygenase. These results suggest that the analgesic effect of DA-5018 is not due to blocking opiate receptor or to inhibiting the synthesis of prostanoids in the arachidonic acid metabolism pathway.