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733

Copyright © 2021 The Korean Society of Fisheries and Aquatic Science pISSN:0374-8111, eISSN:2287-8815

서 론

제주도는한반도최남단에위치한국내에서가장섬으로 지리적으로아열대지방에위치해서비교적기후가온화하다 (Kim and Park, 2014). 사면이바다로둘러싸여있어육지와 원재료교류가어려운지리적특성으로장기간보관이가능 젓갈이발달하였고갈치젓과자리젓등이제주지역의대표 적인젓갈이다(Park et al., 2012; Hazra and Byun, 2021). 이러 제주지역특유의젓갈을이용하여내륙지방과는차별화된 김치문화가발달하였다(Cha et al., 2003; Park et al., 2012).

김치젓갈등의발효식품은원재료의종류와온도등과 다양한조건에따라발효에관여하는미생물의종류가달라

지고결과발효식품의독특한풍미등이결정된다고보고되 있다(Cha and Seo, 2017). 우리나라의대표적인발효식품인 김치와젓갈에는일반적으로 Lactococcus spp., Lactobacillus spp., Pediococcus spp., Weissella spp. 다양한유산균이 재한다고보고되어있으며, 이러한발효식품들에서분리한 산균이나타내는생리활성에대한연구가활발히이루어지고 있다(Choi et al., 2013; Ko et al., 2013). 발효식품에서분리된 유산균들의항균, 항고혈압콜레스테롤저하등의기능성이 알려지면서식품뿐만아니라의약과화장품다양한분야에 유산균을이용하기위한연구가진행되고있다(Jeun et al., 2004; Oh et al., 2010; Kim et al., 2016). Park (2017)광주지 전라남도지역의김치에서 Leuconostoc mesenteroides

제주지역 전통발효식품에서 분리한 유산균의 기능적 특성

강민균

1

·조두민

1

·오도경

1

·송예준

1

·김영목

1,2

·박슬기

2,3

*

1부경대학교 식품공학과, 2부경대학교 식품연구소, 3서스캐쳐원 대학 화학 및 생물 공학과

Functional Characteristics of Lactic Acid Bacteria Isolated From Jeju Island Traditional Fermented Food

Min-Gyun Kang1, Du-Min Jo1, Do Kyung Oh1, Ye-Jun Song1, Young-Mog Kim1,2 and Seul-Ki Park2,3*

1Department of Food Science and Technology, Pukyong National University, Busan 48513, Korea

2Institute of Food Science, Pukyong National University, Busan 48513, Korea

3Department of Chemical and Biological Engineering, College of Engineering, University of Saskatchewan, 57 Campus Dr., Sas- katoon, SK S7N 5A9, Canada

Jeju island is the largest island of South Korea, and has a relatively warm climate due to its geographical charac- teristics. These features have fostered development of various fermented foods distinct to Jeju island. Therefore, the functional activity of the lactic acid bacteria (LAB) isolated from the Jeju region's traditional fermented foods, including

Kimchi

and

Jeotgal

was characterized in this study. Fifteen strains were isolated from 6 types of fermented food. These strains include

Enterococcus

spp.,

Lactoplantibacillus

spp., and

Weisella

spp. Several experiments were carried out to assess functional characteristics including acid resistance, bile resistance, hemolysis, DPPH and ABTS radical scavenging activity, and cholesterol-lowering activity. Three isolated strains (J-4, J-6 and J-10) exhibited high acid resistance, while the other 3 isolates (J-1, J-4 and J-6) showed high bile salt resistance. The strains displayed var- ied DPPH and ABTS radical scavenging activity: 71.14-86.42% among the first 3 strains, and 50.11-75.11% among the remaining 3 strains. Cholesterol-lowering activities were in the range 15.74-82.90% for all isolated strains. In conclusion, these studies suggest that isolated LAB strains from Jeju island traditional fermented foods possess the potential for broader application in the food industry.

Keywords: Anti-cholesterol activity, Antioxidant activity, Fermentation, Lactic acid bacteria

*Corresponding author: Tel: +82. 51. 629. 5832 Fax: +82. 51. 629. 5824 E-mail address: [email protected]

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial Licens (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received 4 August 2021; Revised 7 September 2021; Accepted 17 September 2021 저자 직위: 강민균(대학원생), 조두민(대학원생), 오도경(대학원생), 송예준(대 학원생),김영목(교수),박슬기(연구원)

https://doi.org/10.5657/KFAS.2021.0733

Korean J Fish Aquat Sci 54(5), 733-741, October 2021

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Lactobacillus sakei 8종을분리하였으며우수한항균 물질생성능을가지는유산균을보고하였다. 또한, Kook et al.

(2011)전라북도, 강원도, 경기도서울지역의김치 청북도경기도젓갈류 150여종을시료로하여 Lactobacillus spp.비롯한다양한유산균주를분리동정하였으며, protease 활성이뛰어난유산균주에대해보고하였다. 이처럼 다양한발효식품과다양한지역에서유용유산균을분리하고 기능성에대해규명하려는연구가지속되고있다. 하지만, 내륙과는다른지리적환경과기후조건을가지고있으며다소 독특한식문화를가지고있는제주지역의전통발효식품에서 유용유산균을분리하고기능성을규명하려는연구는미비하 (Ryu and Heo, 2021). 따라서연구에서는제주지역의 발효식품에서유산균을분리하고기능적특성에대한 구를진행하였다.

재료 및 방법

제주도 발효식품에서의 유산균 분리 및 동정

제주도발효식품에서의유산균분리동정을위해제주특별 자치도소재전통시장에서젓갈 4(갈치속젓, 멍게젓, 보말젓 넙치식해) 김치 2(배추김치묵은지)구매하였다. 젓갈김치 25 g 0.1 M phostphate buffer saline (PBS;

pH 7.2)으로 10희석하여균질화시킨이를시료로사용 하였다. 균질화된시료는 bromocresol purple (BCP; Duksan Pure Chemical Co. Ltd., Ansan, Korea) 0.002% (w/v) 첨가 deMan Rogosa Sharpe medium (MRS; Difco, Detroit, MI, USA)접종하여 37°C에서 24시간부터 48시간까지배양하였 으며, 배양유산균이생성하는유기산등에의해집락주위가 노란색으로변한단일집락을선별하여분리하였다.

분리된유산균을동정하기위해 Genomic DNA Extraction Kit (Bioneer, Daejeon, Korea)사용하여 genomic DNA 추출하였으며, 이를이용하여 16S rRNA 증폭을위해 univer- sal primer 27F (5’-AGAGTTTGATCCTGGCTCAG-3’) 1492R (5’-GGTTACCTGTTACGACTT -3’) 이용하여 PCR (polymerase chain reaction) 수행염기서열을분석하 였다. 16S rRNA 염기서열분석은바이오닉스(Bionics, Seoul, Korea) 의뢰하였으며, National Center for Biotechnology Information (NCBI) Basic Local Alignment Search Tool (BLAST) analysis (http://blast.ncbi.nlm.nih.gov/Blast.cgi) 료와비교하여동정하였다.

내산성, 내담즙성 및 용혈성 분석

내산성내담즙성분석은 Ryu et al. (2020)방법을변형 하여진행하였다. 내산성분석을위해, 1 N HCl이용하여 pH 2.0 pH 6.5조정된 10 mL 0.1 M PBS분리된유산균 주를 108-109 CFU (colony forming unit)/mL 수준으로접종

하여 37°C에서 2시간배양하였다. 이를 PBS단계별희석하 MRS agar에서 37°C, 24시간배양생존한집락을계수하 내산성을확인하였다. 내담즙성분석은 MRS broth 10 mL 0.3% (w/v) oxgall (Sigma-Aldrich, St. Louis, MO, USA) 첨가하여제조한인공담즙에 각각의분리 균주를 108- 109 CFU/mL 수준으로 접종하여 37°C에서 7시간 배양한 MRS agar에서균수를확인하여진행하였으며, 대조군으로 oxgall첨가되지않은 MRS broth사용하였다. 분리된 산균의안전성을확인하기위해용혈성분석을진행하였으며, 분리균주의배양액을 5% sheep blood (v/v; KisanBio, Seoul, Korea)첨가한 tryptic soy agar (Difco)획선도말 37°C 에서 24시간배양하여균주주위에형성된환의형태를통해 혈성을판단하였다.

DPPH radical 소거 활성 측정

분리균의 DPPH (2,2-diphenyl-2-pcirylhydrazyl) superox- ide radical 소거활성은 Farvin et al. (2010)방법을변형하 측정하였다. 분리한유산균을 MRS broth에서 37°C, 24시간 배양상등액을사용하기위해원심분리(10,000 g, 15 min, 4°C)진행하였다. 얻어진상등액을 0.2 μm membrane filter (Whatman Int. Ltd., Maidstone, UK)여과하여이를시료로 사용하였다. 여과액시료 0.5 mL 0.15 mM DPPH (Sigma- Aldrich) 용액 1 mL첨가하여 30분간상온의암실에서반응 상등액을 microplate reader (BioTek, Winooski, VT, USA) 이용하여 517 nm파장에서흡광도를측정하였다. 음성대 조구로는동량의증류수를사용하였으며, 양성대조구로는 0.2 mM l-ascorbic acid (Sigma-Aldrich)사용하였다. DPPH radical 소거활성은다음의식으로계산하였다.

Radical scavenging activity (%)=

Absorbance of control - absorbance of test×100 Absorbance of control

ABTS radical 소거 활성 측정

ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)]

radical 소거활성은 Aloğlu and Öner (2011)방법을수정 하여 분석하였다. 분리된유산균배양액의 상등액을 0.2 μm membrane filter (Whatman Int. Ltd.)여과하여사용하였다. ABTS radical solution 2.4 mM potassium persulfate 함한 7 mM ABTS (Sigma-Aldrich)제조하여암실에서 16 시간안정화 734 nm에서흡광도값이 0.700±0.005 도록 희석하여사용하였다. 시료 500 μL ABTS 용액 500 μL혼합하여 6분간상온의암실에서반응상등액을 mi- croplate reader (BioTek)이용하여 734 nm에서흡광도를 정하였다. 음성대조구로동량의증류수, 양성대조구로 5 mM 6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid

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(Trolox; Sigma-Aldrich)사용하였으며, ABTS radical 소거 활성은다음의식으로계산하였다.

Radical scavenging activity (%)=

Absorbance of control - absorbance of test×100 Absorbance of control

콜레스테롤 감소 활성 측정

콜레스테롤 감소 활성을 확인하기 위해 Hwang and Lee (2002)방법을일부변형하여 ortho-phthalaldehyde 정색반 응을이용하였다. 표준곡선은 0.3% oxgall (Sigma-Aldrich) 첨가한 MRS broth water-soluble cholesterol (Sigma- Aldrich)혼합하여작성하였다. 콜레스테롤감소활성을 정하기위해 0.3% oxgall (w/v) water soluble cholesterol (0.1 g/L)함유한 MRS broth분리균주를접종하여 37°C 에서 24시간배양하였으며원심분리(10,000 g, 4°C) 여과한 상등액을시료로사용하였다. 시료 1 mL 50% KOH (w/v) 2 mL 95% ethanol (v/v) 3 mL첨가하여 60°C에서 10 분간 방치시료를냉각시켜 5 mL n-hexane혼합하고 1 mL 증류수를첨가하여 10분간방치상층(hexane ) 3 mL

60°C항온수조에서질소가스로농축하였다. 농축된시료

ortho-phthalaldehyde 반응액(0.5 mg ortho-phthalaldehyde/

glacial acetate in 1 mL; Sigma-Aldrich) 4 mL첨가하여 합한다음상온에서 10분간방치 2 mL진한황산을천천 첨가하여섞어주고, 10상등액을 550 nm에서흡광도 측정하였다.

통계분석

연구에서수행한모든실험은 3반복하였으며, 실험

과들의유의성을검정하기위하여분산분석(ANOVA)수행

, P<0.05 수준에서 Duncan’s multiple range test실시하 였다. 모든통계분석은 SPSS (v.25.0, SPSS Inc., Chicago, IL,

USA) 통계프로그램을이용하여수행하였다.

결론 및 고찰

제주지역 전통발효식품에서 유산균의 분리 및 동정

연구에서 제주도에서구매한젓갈 김치로부터 15 종의유산균을분리하였고이를동정한결과와시료의종류는

Table 1나타내었으며분리균주의염기서열을기반으로

phylogenetic tree Fig. 1 나타내었다(Felsenstein, 1985;

Saitou and Nei,1987; Nei and Kumar, 2000; Kumar et al., 2018). 15종의분리균주의 16S rRNA gene염기서열을분석 결과, Weissella cibaria 4, Weissella confusa 3, Entero- coccus faecalis 3, Enterococcus hirae 1, Weissella halo- tolerans 1, Weissella paramesenteroides 1 Lactoplanti- bacillus plantarum 1 Lactiplantibacillus pingfangensis 1 종으로다양하게나타났으며이는 LAB J-1 J-15명명하 였다. 서울, 여수부산등의지역에서판매하는갈치젓갈 멸치젓갈을이용해유산균을분리한 Lee et al. (2018)에서는 Pediococcus spp. Enterococcus spp.주요유산균으로 고되어있다. 또한일반적으로김치에서우점종인유산균들의

Table 1. Identification of lactic acid bacteria isolated from Jeju traditional fermented food based on 16S rRNA analysis

Strains. Source Subject Identities (%) Hemolysis

LAB J-1

Galchisok-jeot

Enterococcus faecalis strain 2675 16S ribosomal RNA gene 100.00

LAB J-2 Weissella confusa strain S2-16 16S ribosomal RNA gene 99.88

LAB J-3 Weissella cibaria strain 10251 16S ribosomal RNA gene 100.00 γ

LAB J-4 Enterococcus faecalis strain WS19 16S ribosomal RNA gene 99.88

LAB J-5 Weissella confusa strain SB100 16S ribosomal RNA gene 100.00

LAB J-6 Meongge-jeot Enterococcus faecalis strain P5 16S ribosomal RNA gene 100.00 γ LAB J-7

Bomal-jeot Weissella cibaria strain 12098 16S ribosomal RNA gene 100.00 LAB J-8 Weissella paramesenteroides strain S2-7 16S ribosomal RNA gene 100.00 γ LAB J-9 Paralichthys

olivaceus Sikhae Weissella halotolerans JCM 1114 16S ribosomal RNA gene 100.00

LAB J-10 Enterococcus hirae strain ML106 16S ribosomal RNA gene 100.00 γ

LAB J-11

Kimchi

Lactiplantibacillus plantarum strain AMI1103 16S ribosomal RNA gene 100.00

LAB J-12 Lactiplantibacillus pingfangensis strain CP446 16S ribosomal RNA gene 100.00 γ

LAB J-13 Weissella cibariai strain 3128 16S ribosomal RNA gene 100.00

LAB J-14

Mukeunji Weissella confusa strain 3273 16S ribosomal RNA gene 100.00

LAB J-15 Weissella cibaria strain 3052 16S ribosomal RNA gene 100.00 γ

GG Type strain Lactobacillus rhamnosus KCTC 5033

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종은 Lactobacillus spp., Leuconostoc spp. Weisella spp. 알려져있다(Cho et al., 2006; Park et al., 2010). 국내의발효식 품에서분리된유산균들막걸리또는김치와같은전통발효 식품에서분리되는유산균은주로 Lacobacillus spp. Pedio- coccus spp., 등이주로분리되며(Cho et al., 2006; Park et al., 2010; Jung and Kim, 2015; Lee et al., 2018), Park et al. (2013) 젓갈과같은다양한국내전통발효식품에서분리된유산균 주들은 Weissella spp., Leuconostoc spp., Lactobacillus spp. Pediococcus spp. 다양한종이분리되는것으로보고하였다. 연구에서는제주지역의전통발효식품젓갈류에서는 Weissella spp. Enterococcus spp., 김치류에서는 Lacto- bacillus spp.분리되어선행연구들과유사한결과를나타내 었다. 분리균주의염기서열을기반으로 phylogenetic tree Fig. 1나타나있으며분리균주들의표준균주 16s rRNA sequence함께비교분석하였으며, 모든분리균주들은같은 속의표준균주들과같은 group으로분류되었으며이는분리균 주들의 16s rRNA sequence 동정결과가유효함을의미한다.

분리된 유산균의 내산성

연구에서분리된유산균의 pH 2.0 6.5조정한 PBS

에서의 내산성 분석을진행하였다(Fig. 2). 대조군으로 사용 Lactobacillus rhamnosus KCTC 5033 (GG) pH 6.5에서 7.49 log CFU/mL, pH 2.0에서 7.01 log CFU/mL생존하였 으며두가지 pH 조건에서생존한균수의차이가 0.48 log CFU/

mL매우낮았으며따라서우수한내산성이확인되었다. 리균주의경우대부분 pH 6.5비교했을 pH 2.0에서 1.5 log CFU/mL 이상감소하였으며 J-4, J-6, J-10경우비교 높은내산성을가지는것으로나타났다. J-10경우, pH 6.5에서 8.85 log CFU/mL, pH 2.0에서 8.29 log CFU/mL pH 6.5균수와 pH 2.0 조건에서의균수의차이가 0.56

log CFU/mL대조군과유사한우수한내산성을나타내었으

분리균주가장우수한내산성을가지는것으로확인되었 . 멸치젓갈에서분리된 4종의유산균에대한내산성을분석 Lim et al. (2016)에서는 pH 2.0에서 Enterococcus faecium 7 log CFU/mL 생존하여분리된다른유산균에비해 내산성을가지는것으로보고했다. 또한 Ayyash et al. (2018) 보고된바에따르면 Camel milk에서분리한 probiotics 후보 균주들 E. faecium내산성과점착률이높아인체내에 probiotics로써활용될가능성이매우높다고보고하였으며, 연구결과에서도내산성이높은 3균주는동정결과 Ayyash et Fig. 1. Neighbor-joining phylogenetic tree based on 16S rRNA gene sequence, which showing the relationship between isolated strains with each type strain.

(5)

al. (2018)연구와동일한속의균주인 E. faecalis E. hirae 확인되었다.

분리된 유산균의 내담즙성

분리균주를 0.3% oxgall첨가한 MRS broth접종하여 양한내담즙성결과는 Fig. 2같다. Oxgall첨가하지않은 대조구인 GG 균주 15종의분리균주모두 8-9 log CFU/mL

유지되었으나 0.3% oxgall첨가한경우전반적으로생존 균수가감소하였다. 대조구인 GG 균주는 7.61 log CFU/mL 존하였으며분리균주의경우 4.60-8.28 log CFU/mL 생존하는 것으로확인되었다. 분리균주 J-1, J-4 J-6 0.3% oxgall 첨가하여도 8 log CFU/mL생존하였으며감소된 수가대조군보다낮게나타나우수한내담즙성을나타내었다. 연구에서분리된담즙성이우수한 3균주모두 E. faecalis Fig. 2. Acid tolerance of lactic acid bacteria isolated from Jeju traditional fermented foods in 0.1 M phosphate buffer saline adjusted to pH 6.5 (■) and 2.0 (□). GG, Lactobacillus rhamnosus KCTC 5033. Means followed by the same lowercase letter are not significantly different at P<0.05.

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 0.00

1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00

Strains

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 Strains

Log CFU/mL

0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00

Log CFU/mL

efg bc

ef d

h d

h b

d e

k b

d d

h a

fg b

ef c

d b

ef b

efg ef

j d

i bc

fg

bcd ijk

cde h

de

n cde

m cdeg

fg

no bcd

h bcd

ij a

i bc

k ef

i b

l bcd

jk fg

o cde

p cde

o

A A G G J-1 J-2

J-3 J-4

J-5 J-6

J-7 J-8

J-9 J-10

J-11 J-12

J-13 J-14

J-15 100

80

60

40

20

0

100

80

60

40

20

0

100

80

60

40

20

0

Strains

DPPH radical scavenging activity (%)

a e

j h

cd d

l k

c b

e cd i

e f h g

T L GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9

J-10 J-11 J-12 J-13 J-14 J-15 Strains

ABTS radical scavenging activity (%)

a

b c b cd

f g g

j

h g

d

h i e

f f

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10

J-11 J-12

J-13 J-14

J-15 Strains

Cholesterol lowering Activity (%)

a a

bc

de de

b bc cd

de a

e f

h g

i h

Fig. 3. Bile tolerance of lactic acid bacteria isolated from Jeju traditional fermented foods in the presence of 0% (■) or 0.3% oxgall (□). GG, Lactobacillus rhamnosus KCTC 5033. Means followed by the same lowercase letter are not significantly different at P<0.05.

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 0.00

1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00

Strains

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 Strains

Log CFU/mL

0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00

Log CFU/mL

efg bc

ef d

h d

h b

d e

k b

d d

h a

fg b

ef c

d b

ef b

efg ef

j d

i bc

fg

bcd ijk

cde h

de

n cde

m cdeg

fg

no bcd

h bcd

ij a

i bc

k ef

i b

l bcd

jk fg

o cde

p cde

o

A A G G J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9

J-10 J-11 J-12 J-13 J-14 J-15 100

80

60

40

20

0

100

80

60

40

20

0

100

80

60

40

20

0

Strains

DPPH radical scavenging activity (%)

a e

j h

cd d

l k

c b

e cd i

e f h g

T L GG J-1

J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9

J-10 J-11 J-12 J-13 J-14 J-15 Strains

ABTS radical scavenging activity (%)

a

b c b

cd

f g g

j

h g

d

h i e

f f

GG J-1 J-2

J-3 J-4

J-5 J-6

J-7 J-8

J-9 J-10

J-11 J-12

J-13 J-14

J-15 Strains

Cholesterol lowering Activity (%)

a a

bc

de de

b bc cd

de a

e f

h g

i h

(6)

강민균

조두민

오도경

송예준

김영목

박슬기

738

동정되었으며 Khalkhali and Mojgani (2017)보고된 의하면 human milk에서분리된 E. faeciumE. faecalis 모두높은 bile salt 농도에서도생존했으며, 가지균주 probiotics로써의활용도가높다고보고하였다. 또한, Cho et al. (2007)따르면, 김치로부터분리한 L. plantarum oxgall 0.1%에서 8 log CFU/mL, 0.5 1.0%에서 5 log CFU/mL 이상생존하는것으로보고되어있다. 일반적으로사람이섭취 미생물들은담즙산에의해세포막에영향을받아미생물 장이억제되는것으로알려져있으나특정유산균의 경우

즙산염가수분해효소를이용하여담즙산을가수분해억제 하여내담즙성을나타내는것으로보고되어있다(Sahadeva et al., 2011). 내산성과내담즙성이높은유산균주는 probiotics 활용위액담즙산에의해서도생존률이높아장관에서 익한환경을조성하는데유리하다고알려져있다(Seo and Lee, 2007).

분리된 유산균의 용혈성

용혈성은적혈구가파괴되거나적혈구의미생물이생성하는 Fig. 4. DPPH radical scavenging activity of lactic acid bacteria isolated from Jeju traditional fermented foods. AA, 0.2 mM l-ascorbic acid;

GG, Lactobacillus rhamnosus KCTC 5033. Means followed by the same lowercase letter are not significantly different at P<0.05.

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 0.00

1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00

Strains

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 Strains

Log CFU/mL

0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00

Log CFU/mL

efg bc

ef d

h d

h b

d e

k b

d d

h fg

b ef

c d

b

ef b

efg ef

j d

i bc

fg

bcd ijk

cde h

de

n cde

m cdeg

fg

no bcd

h bcd

ij a

i bc

k ef

i b

l bcd

jk fg

o cde

p cde

o

A A G G J-1 J-2

J-3 J-4

J-5 J-6

J-7 J-8

J-9

J-10 J-11 J-12 J-13 J-14 J-15 100

80

60

40

20

0

100

80

60

40

20

0

100

80

60

40

20

0

Strains

DPPH radical scavenging activity (%)

a e

j h

cd d

l k

c b

e cd i

e f h g

T L GG J-1 J-2

J-3 J-4

J-5 J-6

J-7 J-8

J-9

J-10 J-11 J-12 J-13 J-14 J-15 Strains

ABTS radical scavenging activity (%)

a

b c b

cd

f g g

j

h g

d

h i e

f f

GG J-1 J-2

J-3 J-4

J-5 J-6

J-7 J-8

J-9 J-10

J-11 J-12

J-13 J-14

J-15 Strains

Cholesterol lowering Activity (%)

a a

bc

de de

b bc cd

de a

e f

h g

i h

Fig. 5. ABTS radical scavenging activity of lactic acid bacteria isolated from Jeju traditional fermented foods. TL, 5 mM Trolox; GG, Lac- tobacillus rhamnosus KCTC 5033. Means followed by the same lowercase letter are not significantly different at P<0.05.

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 0.00

1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00

Strains

GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 Strains

Log CFU/mL

0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00

Log CFU/mL

efg

h h

e

k

h

fg ef efg ef

j i

fg

bcd ijk

cde h

de

n cde

m cdeg

fg

no bcd

h bcd

ij a

i bc

k ef

i b

l bcd

jk fg

o cde

p cde

o

A A G G J-1 J-2

J-3 J-4

J-5 J-6

J-7 J-8

J-9

J-10 J-11 J-12 J-13 J-14 J-15 100

80

60

40

20

0

100

80

60

40

20

0

100

80

60

40

20

0

Strains

DPPH radical scavenging activity (%)

a e

j h

cd d

l k

c b

e cd i

e f h g

T L GG J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9

J-10 J-11 J-12 J-13 J-14 J-15 Strains

ABTS radical scavenging activity (%)

a

b c b cd

f g g

j

h g

d

h i e

f f

GG J-1 J-2

J-3 J-4

J-5 J-6

J-7 J-8

J-9 J-10

J-11 J-12

J-13 J-14

J-15 Strains

Cholesterol lowering Activity (%)

a a

bc

de de

b bc cd

de a

e f

h g

i h

수치

Table 1. Identification of lactic acid bacteria isolated from Jeju traditional fermented food based on 16S rRNA analysis
Fig. 3. Bile tolerance of lactic acid bacteria isolated from Jeju traditional fermented foods in the presence of 0% (■) or 0.3% oxgall (□)
Fig. 5. ABTS radical scavenging activity of lactic acid bacteria isolated from Jeju traditional fermented foods

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