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      • 濟州道産 모기의 分類와 生態學的 硏究를 爲한 豫備調査 및 絲狀蟲類에 依한 感染狀況

        全錫洛 서울大學校 保健大學院 1968 公衆保健雜誌 Vol.5 No.2

        The purpose of this study was to be aided in epidemiological and ecological studies of filariasis on Che Ju Island by providing necessary informations concerning species and biology of mosquitoes of the island. For the study, adults and larvae of mosquitoes were collected by C.D.C. type light trap and aspirator (resting and biting collection) from 21 villages and their vicinities during two summer months August and September of 1968. They were subjected to species identification and dissected under dissecting microscope after the identification to examine its infection status by filaria species larvae. The results obtained are as follows: 1. The species collected and identified: In the study areas three genus (Anopheles, Culex and Aedes) and thirteen species of mosquito were identified; A. (Anopheles) lestery, A. sineroides, A. sinensis, C. (Culex) pipiens pallens, C. tritaeniorhyncus, C. vagans, C. bitaeniorhyncus, C. vorax, C. hayashii, Ae. (Aedes) togoi, Ae. albopictus, Ae. vexan and Ae. hatorii. An important fact is that A. sineroides, A. lestery. C. vagans, C. bitaeniorhyncus, C. vorax, and C. hayashii among these species were never been reported before from the island. 2. Geographical distribution of the species: Among the species collected, C. pipiens had the most wide distribution and dense population throughout the island, then Ae. togoi, Ae. albopictus and C. tritaeniorhyncus followed next order. 3. Biological surroundings for larval habitat : C. pipiens was found to breed widely in various circumstances ranged from clean ground water to filthy ponds. Ae. togoi bred mainly in tide water of rock pools along shore line although in case of Bi Yang islet, the main beeding habitat was cement water tank retaining rain water. C. tritaeniorhyncus used to be collected from roadside ditches or ponds with filthy water usually mixed with C. pipiens, Ae. hatorii larvae were found in fresh clean water of rock pools along streams of vallies. Anopheles species had relatively numerous places as habitat such as cement water tank clean water ponds, wells. streams, and rice fields even though the larva was very scarce in number. Ae. albopictus had breeding place in artificial containers around houses in orchard and bamboo tree stumps, which are shaded and cool. 4. Species constitution of adult mosquitoes collected in villages: Adult mosquitoes were collected by light trap, resting and biting collection in these four particular areas where human filariasis survey was conducted. The population collected was largely consisted of Ae. togoi with the range of 68.9%-93.9% by areas. This fact suggests that a large population of Ae. togoi may be closely related to the endemicity of human filariasis. 5. Study of mosquitoes for the status of natural infection by filaria species: Only one species among other species examined, Ae. togoi was found to be infected. The natural infection rate of mosquito (Ae. togoi) revaled a strong correlation with that of human filariasis; the infection rate of the mosquito was proportional to human microfilaria rate in all villages studied.

      • SCOPUSKCI등재

        Helicobacter pylori의 생육을 특이적으로 억제하는 유산균 선발

        정후길,김응률,전석락 한국미생물학회 2001 미생물학회지 Vol.37 No.2

        위염 및 위궤양, 심이지장궤양, 위암의 주요한 발병 원인균으로 알려져 있는 Helicobacter pylori의 생육을 특이적으로 억제하는 유산균을 선발하기 위해서, 45종의 유산균에 대하여 paper disk법을 이용한 항균 효과, Caco-2세포에 대한 정착능, urease activity법을 이용한 H. pylori 억제능 등을 파악하고, 유산균 배양액과 H. pylori의 동시배양에 따른 요소 분해효소의 활성 변화와 우유 발효능 등을 실험하였다. H. pylori의 생육을 억제하는 물질의 생성 유무를 확인하기 위하여 paper disk법으로 유산균 배양액에 의한 H. pylori의 생육 억제환을 측정한 결과, 28종의 유산균에서 생육 억제환이 형성되었다. 대부분이 유산 생성에 의한 낮은 pH 때문인 것으로 판단되지만, 일부 균종에서는 항균성 물질에 의한 억제환이 형성되었다. 다른 유산균에 비해서 생육 억제환이 가장 큰 Lactobacillus gasseri MK-03 균주가 H. pylori에 대한 항균 활성이 가장 우수한 것으로 나타났다. 항균 활성을 나타낸 28종의 유산균을 대항으로 Caco-2 세포에 대한 정착능을 실험한 결과, 18종의 유산균에서 정착능이 확인되었으며, Bifidobacterium longum MK-26 균주가 가장 우수한 것으로 나타났다. 특히 반응 2시간 전에 미리 Caco-2 세포에 정착시켰을 때, H. pylori의 정착율은 0.105%에서 0.004%로 감소되었다. 한편 요소 분해효소 활성을 저해하여 H. pylori를 억제하는 유산균을 선발하기 위해서 항균활성이 인정되는 28종의 유산균을 대상으로 실험한 결과, 21종의 유산균에서 요소 분해효소 활성의 저해 효과가 나타났으며, 이중에서 Lb. acidophilus MK-07 균주가 가장 우수한 것으로 판명되었다. 따라서 Lb. gasseri MK-03 균주는 항균 활성에서, Lb. acidophilus MK-07 균주는 요소 분해효소의 활성 억제에 의해서, Bif. longum MK-26 균주는 정착능 저해에 있어서 각각 우수한 H. pylori 생육 억제능을 나타냈다. 한편 최종적으로 선발된 3종의 유산균과 대조균주로서 13종의 유산균에 대해서는 우유 배양실험을 실시한 결과, 3종의 선발균주 모두가 발효유 제품에의 응용 적합성을 나타냈다. This study was conducted to select lactic acid bacteria which possess potential inhibitory effect on Helicobacter pylori, and to make feasibility test of fermented milk products using them. In order to select lactic acid bacteria specifically inhibiting the growth of H. pylori, antibacterial activity using paper disk method, adherence ability to Caco-2 cell inhibitory effect on urease activity of H. pylori, and milk fermentation feasibility were measured. Among 45 strains of lactic acid bacteria tested, 28 strains showed clear zone and Lactobacillus gasseri MK-03 showed the largest clear zone. Caco-2 cell adherence by lactic acid bacteria and inhibitory effect of them on H. pylori adherence were also evaluated. Of 28 strains tested, 18 strains appeared to be effective on adherence to Caco-2 cell, and especially Bifidobacterium longum MK-26 was found to be superior to others. When Bif. longum MK-26 and H. pylori were reacted with Caco-2 cell 2hrs before, adherence percentage of H. pylori decreased from 0.105% to 0.004%. To investigate inhibitory effect of lactic acid bacteria-derived supernatant on urease activity of H. pylori, pH-adjusted fermented supernatant(pH-4.4) was assessed by co-cultivation method. There of Lb. acidophilus MK-07-derived supernatant showed the most inhibitory effect on urease activity of H. pylori. Considering milk fermentation ability of selected 3 strains, they were comparably feasible to fermented milk products. Consequently, Lb. gasseri MK-03, Lb. acidophilus MK-07, and Bif. longum MK-26 were selected to specifically inhibit the growth of H. pylori, by antibacterial activity, inhibition of urease activity, and inhibition of Caco-2 cell adherence, respectively.

      • SCIESCOPUSKCI등재
      • SCIESCOPUSKCI등재
      • SCIESCOPUSKCI등재
      • SCIESCOPUSKCI등재
      • SCOPUSKCI등재

        토끼 항 ${\beta}-Lactoglobulin$ 항혈청에 대한 유청단백질 가수분해물의 항원성

        이수원,하월규,전석락,김정완,손동화,이재영,Lee, Soo-Won,Ha, Woel-Kyu,Juhn, Suk-Lak,Kim, Jung-Wan,Shon, Dong-Hwa,Lee, Jae-Young 한국식품과학회 1994 한국식품과학회지 Vol.26 No.5

        Chymotrypsin, trypsin, pancreatin, 그리고 Aspergillus oryzae 유래 단백질분해효소의 in vitro 처리에 의하여 유청단백질(WPI)의 가수분해물(WPH)중 ${\beta}-LG$유래의 항원성변화를 조사하기 위하여 토끼 항${\beta}-LG$항혈청을 이용한 competitive inhibition ELISA(cELISA)와 heterologous PCA를 실시하였다. cELISA에 의하여 WPH의 monovalent항원성을 분석한 결과, 전체적으로 ${\beta}-LG$유래의 monovalent항원성은 효소처리에 의하여 $10^{-1.7}{\sim}10^{-4.1}$배 또는 그 이하로 저하되었으며, 특히 pepsin전처리후 Asp. oryzae유래의 효소로 가수분해한 경우(OUP)의 항원성은 거의 상실되었다. Guinea pig를 이용한 PCA test에 의하여 ${\beta}-LG$유래의 polyvalent항원성을 분석한 결과, WPH의 항원성은 $1/2{\sim}1/128$ 또는 그 이하로 저하되었다. 특히, WPH중에서 열변성이나 pepsin의 전처리없이 Asp. oryzae유래의 효소로 가수분해한 경우(OUN), 가수분해도(DH)가 그다지 높지 않고 monovalent항원성도 여전히 잔존하였음에도 불구하고($10^{-3.2}$배로 저하) 알레르기의 발증과 밀접한 관련이 있는 polyvalent항원성은 거의 상실되었다. 이는 OUN의 분해효율이 아주 높지는 않으나 ${\beta}-LG$상의 항원결정기가 효과적으로 파괴되어, polyvalent항원성이 제거되었기 때문으로 추측된다. 이 결과는, Asp. oryzae유래의 효소를 WPI에 처리하면 우유 알레르기의 주요 원인물질인 ${\beta}-LG$의 polyvalent항원성이 제거됨으로써 저알레르기성 infant formula용 WPH가 제조될 수 있음을 시사하고 있다. In order to investigate the lowering effects of in vitro enzymatic hydrolysis by the treatment of chymotrypsin, trypsin, pancreatin, or protease from Aspergillus oryzae on the antigenicity of whey protein(WPI) against rabbit anti ${\beta}-LG$ antiserum, competitive inhibition ELISA(cELISA) and passive cutaneous anaphylaxis(PCA) test using guinea pig were performed. The results of cELISA showed that the monovalent antigenicity of the whey protein hydrolysates(WPH) to the antiserum was decreased to $10^{-1.7}{\sim}10^{-4.1}$ and less by the hydrolysis. Especially, the antigenicity of OUP(hydrolysate by protease from Asp. oryzae with preteatment of pepsin) was found almost to be removed. By the heterologous PCA the polyvalent antigenicity of the WPH was decreased to $1/2{\sim}1/128$ and less. Especially, the polyvalent antigenicity of OUN(hydrolysate by protease from Asp. oryzae without preteatments) was found almost to be removed, although OUN did not have so high degree of hydrolysis(DH) or so low monovalent antigenicity (reduced to $10^{-3.2}$). Therefore, this result was assumed to come from effective destruction of antigenic determinants on ${\beta}-LG$ in WPI, not to produce polyvalent antigenic peptides that are closely associated with induction of allergy. This finding suggested that WPH prepared by the treatment of microorganic protease from Asp. oryzae would be a material for hypoallergenic infant formula due to the removal of the polyvalent antigenicity of ${\beta}-LG$, the major milk allergen in WPI.

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