http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Macroalgae as the Source for Environmental Assessment
Luyen, Hai-Quoc,Meinita, Maria D.N.,Hong, Yong-Ki The Korean Society for Marine Biotechnology 2007 한국해양바이오학회지 Vol.2 No.2
Macroalgal tissues can be used as indicating materials for environmental assessment using several algal biotechnology techniques. As bioassay test organisms, macroalgal tissues are required as an axenic state for suitable biological indicators. Callus formation and blade regeneration under suitable culture conditions are also useful for the tests. Quantitative method using tetrazolium chloride or $alamarBlue^{TM}$ is devised on a rapid assessment of the seaweed viability. The use of RT-PCR especially differential display technique should provide the means for the detection and isolation of the responding genes induced by the environmental stress. Seaweed thriving in more environmental changes might contain more diverse biologically active substances.
Luyen, Quoc-Hai,Chowdhury, Muhammad Tanvir Hossain,Choi, Jae-Suk,Kang, Ji-Young,Park, Nam-Gyu,Hong, Yong-Ki The Korean Society of Fisheries and Aquatic Scienc 2012 Fisheries and Aquatic Sciences Vol.15 No.2
An improved strain of the red seaweed Porphyra suborbiculata containing an increased amount of the essential amino acid L-lysine was obtained through mutation and analog enrichment. Mutagenesis using a 10% lethal dose of ultraviolet irradiation and an enrichment culture with the L-lysine analog aminoethyl-L-cysteine (AEC) was repeated to select the most productive strain using monospores of P. suborbiculata. The concentrations of AEC required to produce 50 and 100% inhibition of survival were 60 and 115 mM in the parent strain, and 72 and 135 mM in the selected AEC-resistant strain, respectively. The AEC-resistant strain, L130, produced 1.74-fold more lysine compared to its parent strain. Thus, mutagenesis with analog enrichment shows promise for selecting seaweed strains that can overproduce this essential amino acid.
Quoc-Hai Luyen,Muhammad Tanvir Hossain Chowdhury,최재석,강지영,박남규,홍용기 한국수산과학회 2012 Fisheries and Aquatic Sciences Vol.15 No.2
An improved strain of the red seaweed Porphyra suborbiculata containing an increased amount of the essential amino acid llysine was obtained through mutation and analog enrichment. Mutagenesis using a 10% lethal dose of ultraviolet irradiation and an enrichment culture with the l-lysine analog aminoethyl-l-cysteine (AEC) was repeated to select the most productive strain using monospores of P. suborbiculata. The concentrations of AEC required to produce 50 and 100% inhibition of survival were 60and 115 mM in the parent strain, and 72 and 135 mM in the selected AEC-resistant strain, respectively. The AEC-resistant strain,L130, produced 1.74-fold more lysine compared to its parent strain. Thus, mutagenesis with analog enrichment shows promise for selecting seaweed strains that can overproduce this essential amino acid.
미역의 8가지 품질기준 설정을 위한 양식산 및 자연산 미역의 비교
홍용기,박남희,Luyen Quoc Hai,서만석 한국수산과학회 2008 한국수산과학회지 Vol.41 No.5
Eight quality standards of the brown seaweed, Undaria pinnatifida were designed and evaluated with dry products collected from aquacultured and wild areas. Contents of n-3 fatty acids (stearidonic acid and eicosapentaenoic acid), anti-edema activity, and total carbohydrate were measured as functional criteria. Total bacteria and molds were counted for safety conditions. Amounts of a brown pigment fucoxanthin, debris, and moisture were measured to evaluate the visible status of the products. When the seaweeds were tested in 1g dry weight basis, they showed n-3 fatty acids in the range of approximately 0.2-2.8 mg, total carbohydrate of 0.39-0.71g, total bacteria of 104-6 cells, mold of 102 cells, fucoxanthin of 0.4-1.5 mg, and debris of 10-24mg. Anti-edema activity was 0.03-0.47AU at 40mg/mL extract. Moisture content was 11.4-12.6%.
Dang, Diem-Hong,Luyen, Hai-Quoc,Hien, Hoang Thi Minh,Thu, Ngo Hoai,Anh, Hoang Lan The Korean Society for Marine Biotechnology 2007 한국해양바이오학회지 Vol.2 No.1
For the first time in Vietnam, morphological and molecular studies of a species belonging to Bacillariophyceae collected in Northern coast of Vietnam are presented. Observations with microscope showed that this species belong to genus: Pseudo-nitzschia and seem like P. pungens. Sequence data from the partial 18S small subunit ribosomal RNA gene (18S rDNA) and the internal transcribed spacer 1 - 5.8S - internal transcribed 2 have been used to determine clearly and generate a phylogenetic framework of the obtained sequences to previously reported sequences in GenBank. These results allowed us to highlight described species of Bacillariophyceae in Northern coast of Vietnam. Furthermore, accumulation of molecular study would be helpful for the identification of scientific name of harmful algal species and further taxonomic studies in Vietnam.
Ji-Young Kang(강지영),Quoc-Hai Luyen,Mohammed Nurul Absar Khan,Jae-Suk Choi(최재석),In Soon Choi(최인순),Yong-Ki Hong(홍용기) 한국생명과학회 2012 생명과학회지 Vol.22 No.6
한약재의 원료 및 전세계적 외래종으로 알려져 있는 녹조류 청각(Codium fragile)의 디클로로메탄, 에탄올, 열수추출물을 대상으로 하여 생쥐에서의 항 염증, 해열, 및 진통 활성을 조사하였다. 청각의 디클로로메탄과 에탄올추출물은 phorbol 12-myristate 13-acetate로 유도된 생쥐 귀의 부종과 충혈에 대한 염증 증상을 74% 이상의 높은 저해 작용을 보였으며, 이들 추출물은 acetyl salicylic acid와 유사하게 발열증상을 억제하였다. 청각으로부터 주된 항 염증 활성물질은 eicosapentaenoic acid인 것으로 분리되었다. 이러한 결과는 청각이 여러 염증 관련 증상에 대처할 약제로서도 사용되어 질 수 있다는 사실을 뒷받침해 준다. Dichloromethane, ethanol, and boiling water extracts of the green seaweed Codium fragile, used as an herbal medicine and known as an invasive species over the world, were examined for anti-inflammatory, antipyretic, and analgesic activities in mice. The dichloromethane and ethanol extracts inhibited inflammatory symptoms of mouse ear edema and erythema by 74% or higher. The extracts also demonstrated inhibition of pyrexia, similar to that of acetyl salicylic acid. Eicosapentaenoic acid was isolated from the seaweed as the main active anti-inflammatory compound. These findings are consistent with various claims that the seaweed can be used as remedies for inflammation-related symptoms.
Isolation of the Agarolytic Bacterium Vibrio cyclotrophicus DAG-130 from Abalone Gut
Meinita, Maria Dyah Nur,Luyen, Hai-Quoc,Hwang, Seon-Yeong,Kang, Ji-Young,Jin, Deuk-Hee,Hong, Yong-Ki The Korean Society of Fisheries and Aquatic Scienc 2008 Fisheries and Aquatic Sciences Vol.11 No.2
We isolated 1,916 strains of bacteria from gut and feces of abalone. The most active agarolytic bacterium, DAG-130, was identified from the gut of the abalone Haliotis gigantea. Of the bacteria harbored by both H. discus hannai and H. gigantea, 59% were agarolytic. There was no significant difference in the number of agarolytic bacteria isolated from abalone fed on the seaweeds Gelidium amansii, Laminaria japonica, or Undaria pinnatifida. Of the agarolytic bacteria, 72% were isolated from the guts of all sources tested while 43% came from the feces. The strain DAG-130 showed 100% identity with the bacterium Vibrio cyclotrophicus based on phylogenetic analysis of l6S rDNA. The bacterium produced monomers and oligomers from the agar substrate.
Isolation of the Agarolytic Bacterium Vibrio cyclotrophicus DAG-130 from Abalone Gut
Maria D.N.Meinita,Hai-Quoc Luyen,황선영,강지영,진덕희,홍용기 한국수산과학회 2008 Fisheries and Aquatic Sciences Vol.11 No.2
We isolated 1,916 strains of bacteria from gut and feces of abalone. The most active agarolytic bacterium, DAG-130, was identified from the gut of the abalone Haliotis gigantea. Of the bacteria harbored by both H. discus hannai and H. gigantea, 59% were agarolytic. There was no significant difference in the number of agarolytic bacteria isolated from abalone fed on the seaweeds Gelidium amansii, Laminaria japonica, or Undaria pinnatifida. Of the agarolytic bacteria, 72% were isolated from the guts of all sources tested while 43% came from the feces. The strain DAG-130 showed 100% identity with the bacterium Vibrio cyclotrophicus based on phylogenetic analysis of 16S rDNA. The bacterium produced monomers and oligomers from the agar substrate.