• 미생물학회지
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• 제34권1_2호
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• pp.37-42
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• 1998

토양으로부터 levan을 분해하여 단일종의 fructooligosaccharide를 생산하는 새로운 미생물을 분리 선별하여 본 연구의 공시균주로 선택하였다. Levanase 생산을 위한 최적 배지조성은 0.5% levan, 0.3% yeast extract 0.3% $NaNO_3$, 0.1% $K_2HPO_4$, 0.05% NaCl(pH 8.0)이었으며, 500ml용 shaking flask에 배지 50ml를 넣어 $30^{\circ}C$에서 54시간 배양시켰을 때 목적효소의 생산이 최대에 도달하였다. Levanase에 의해 생성되는 생성물은 단일종의 oligo당임이 확인되었으며 측쇄가 많은 levan으로부터는 소량의 측쇄구조를 가진 oligosaccharide로 추정되는 미지의 물질이 부산물로 생성되었다. 생성 oligo당을 순수하게 정제하여 HPLC 및 ESI-MASS로 중합도를 조사한 결과 DP가 7인 levanheptaose임이 판명되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제27권7호
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• pp.1026-1034
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• 2014

This study was conducted to assess the effects of flaxseed oil and dried whitebait as a source of ${\omega}$-3 fatty acids (${\omega}$-3 FA), which could be used to produce eggs enriched with ${\omega}$-3 FA, and of fructo-oligosaccharide (FOS) as a source of prebiotics on performance of hens (commercial Hy-Line Brown laying hens), and FA composition, internal quality, and sensory characteristics of the eggs. Dietary FOS increased egg weight. The amounts of ${\alpha}$-linolenic (ALA), eicosapentaenoic (EPA) and docosahexaenoic acids (DHA) in the eggs from the hens fed the flaxseed oil alone or flaxseed oil+dried whitebait diets were higher than those of the control. Hedonic scores for off-flavor, fishy flavor, buttery taste and overall acceptability of the eggs from the hens fed the diet containing flaxseed oil+dried whitebait were lower (p<0.05) than those of the control. Overall acceptability of the eggs from the hens fed the diet containing soybean oil+dried whitebait was lower (p<0.05) than that of the control. However, all the sensory attributes of the eggs from the hens fed the diet containing flaxseed oil, dried whitebait and FOS were not significantly different from those of the control. These results confirmed that flaxseed oil increases the ALA content in the eggs and a combination of flaxseed oil and dried whitebait increases EPA and DHA in the eggs. Of significance was that addition of FOS to the flaxseed oil+dried whitebait diet improves the sensory characteristics of the eggs enriched with ${\omega}$-3 FA.

• Asian-Australasian Journal of Animal Sciences
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• 제24권6호
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• pp.844-850
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• 2011

This study was conducted to compare the effects of dietary supplementation of Sodium Gluconate (SG), Mannan Oligosaccharide (MOS) and Potassium Diformate (PDF) on growth performance and small intestinal morphology in nursery piglets. One hundred forty four female piglets ($11.69{\pm}0.71\;kg$) were divided into 4 treatments with six replicates of six pigs each. The pigs received a control diet or diets supplemented with SG, MOS and PDF at 2,500, 3,000 and 8,000 ppm; respectively, for 6 weeks. Supplementation of SG, MOS or PDF increased final body weight, average daily gain and tended to improve feed to gain ratio (p = 0.02, 0.04 and 0.16; respectively), other than average daily feed intake, intestinal pH and the bacterial populations were not influenced by the dietary treatments. SG significantly decreased the ammonia concentration in the caecum (p<0.05) and supplementation of SG, MOS or PDF tended to increase lactic acid and total short chain fatty acid concentration in the caecum (p = 0.08, 0.09; respectively), in addition SG, MOS or PDF slightly increased butyric acid concentration in the caecum (p = 0.14). SG highly significant increased the villous height in jejunum (p<0.01) and supplementing SG, MOS or PDF significantly increased crypt depth in jejunum (p<0.05), moreover, PDF significantly increased villous height and crypt depth ratio in jejunum (p<0.05) compared with control. The dietary treatments did not influence villous height and crypt depth in duodenum and villous height in jejunum (p>0.05). It can be concluded that supplementing SG, MOS or PDF as a feed additive has the potential to improve the growth performance, the intestinal lactic acid bacteria population, intestinal short-chain fatty acid concentration and the intestinal morphology of pigs.

• Nutrition Research and Practice
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• 제10권6호
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• pp.583-589
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• 2016

BACKDROUND/OBJECTIVE: Constipation is a condition that can result from intestinal deformation. Because humans have an upright posture, the effects of gravity can cause this shape deformation. Oligosaccharides are common prebiotics and their effects on bowel health are well known. However, studies of the physiological functionality of a product that contains both lactulose and galactooligosaccharides are insufficient. We investigated the constipation reduction effect of a dual-type oligosaccharide, Dual-Oligo, in loperamide-treated rats. MATERIALS/METHODS: Dual-Oligo consists of galactooligosaccharides (15.80%) and lactulose (51.67%). Animals were randomly divided into four groups, the normal group (normal), control group (control), low concentration of Dual-Oligo (LDO) group, and high concentration of Dual-Oligo (HDO) group. After 7 days of oral administration, fecal pellet amount, fecal weight, watercontent of fecal were measured. Blood chemistry, short-chain fatty acid (SCFA), gastrointestinal transit ratio and length and intestinal mucosa were analyzed. RESULTS: Dual-Oligo increased the fecal weight, and water content of feces in rats with loperamide-induced constipation. Gastrointestinal transit ratio and length and area of intestinal mucosa significantly increased after treatment with Dual-Oligoin loperamide-induced rats. A high concentration of Dual-Oligo tended to produce more acetic acid than that observed for the control group, and Dual-Oligo affected the production of total SCFA. Bifidobacteria concentration of cecal contents in the high-concentration oligosaccharide (HDO) and low-concentration oligosaccharide (LDO) groups was similar to the result of the normal group. CONCLUSIONS: These results showed that Dual-Oligo is a functional material that is derived from a natural food product and is effective in ameliorating constipation.

• 한국식품과학회지
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• 제21권1호
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• pp.164-172
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• 1989

Streptococcus thermophilus 510의 ${\beta}-galactosidase$는 유당을 가수분해 하는 동시에 galactose전이반응을 일으켜 세 종류의 galactooligosaccharides를 형성 하였다. Oligosaccharide의 최대 생성 조건은 40% 유당 용액에 효소 50 ONPG units/ml를 첨가한 혼합액을 $37^{\circ}C$에서 4시간 반응시켰을 때 이며, 이 조건에서 유당이 약 94% 가수분해 되었고 생성된 oligosaccharides의 양은 총 당의 약 30% 이었다. 생성된 총 oligosaccharides의 69%는 $6-o-{\beta}-D-galactopyranosyl-D-glucose(allolactose)$, 23%는 $6-o-{\beta}-D-galactopyranosyl-D-galactose(isogalactobiose)$ 이었으며, 형성된 galactooligosaccharides을 Bio-Gel P-2 gel permeation chromatography 방법에 의해서 순수하게 분리 정제하여 구조를 조사하여 본 결과 glucose, galactose, allolactose, 그리고 isogalactobiose 임을 확인할 수 있었다.

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2007년도 제48회 학술심포지움 및 추계국제학술대회
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• pp.127.2-127.2
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• 2007

See Full Text

• Food Science and Biotechnology
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• 제17권3호
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• pp.514-518
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• 2008

After overproduction of a recombinant $\beta$-galactosidase of Bifidobacterium infantis in Pichia pastoris, a synthesis of galacto-oligosaccharides (GOS) from 36% lactose using the enzyme (170.74 U/mg) was investigated. The transgalactosylation ratio reached up to 25.2% with 83.1% conversion of initial lactose and the maximum yield of GOS was 40.6%. The GOS syrup was composed of a 13.43% galacto-oligosaccharides, 5.06% lactose, and 8.76% monosaccharides. The prebiotic effect of GOS on the growth of bifidobacteria and lactobacilli strains was investigated in vitro. The maximum growth rate of Bifidobacterium breve and Lactobacillus acidophillus in GOS syrup (5%, v/v) media were 0.49 and 0.96/hr that are higher than those in 1%(w/v) galactose and 1%(w/v) lactose containing media. However, there was no significant difference between the specific growth rates of L. acidophillus in 1%(w/v) glucose and 5%(v/v) GOS syrup. Our data showed that GOS definitely promoted the growth of B. breve ATCC $15700^T$ and L. acidophilus ATCC 33323.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2002년도 생물공학의 동향 (X)
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• pp.528-530
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• 2002

Xanthmonas oryzae MGL21유래의 CFTase의 repeat영역을 deletion 시킨 ${\triangle}N{\triangle}C$ deletion mutant는 protein 정제결과 약 90kDa 이있으며 pH6.5, $45^{\circ}C$에서 최적 효소 반응을 하였다. 또한 Inulin과 반응시켰을 때 CFTase는 main product가 CF인데 비해 ${\triangle}N{\triangle}C$ deletion mutant는 main product가 fructooligosaccharide였다. 이러한 결과로부터 CFTase의 N말단 repeat영역과 C말단 repeat영역을 제거하였을 경우 endoinulinase와 활성이 유사하며, 유전자 크기 및 아미노산 서열도 유사함을 알 수 있었다.

• 한국식품영양과학회지
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• 제35권1호
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• pp.109-114
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• 2006

해양생물 및 토양으로부터 총 619주의 알긴산 분해능을 나타내는 균주를 분리하여 이중 분해능이 강력했던 균주의 배양 조건 및 효소 생산 조건을 실험한 결과, 탄소원으로는 Na-alginate $2\%$, 질소원으로 nutrition broth $0.1\%$, NaCl 농도 $2\%$, pH 7.5, 배양 온도는 $30^{\circ}C$, 배양 시간은 $144\~150$ 시간이 최적 배양 및 효소 생산 조건이었다. 아울러 균체의 생리, 생화학적 특성을 분석한 결과, 본 실험 균주가 Bacillus licheniformis로 동정 되어 최종 Bacillus licheniformis AL-577로 명명하였다.

• 한국미생물·생명공학회지
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• 제24권4호
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• pp.404-407
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• 1996

The effects of carbon sources on vancomycin production were investigated using Nocardia orientalis CSVC 3300. Among carbon sources tested, glucose, maltose and fructose were effective for the production of vancomycin. Glucose was favored for growth, but decrease the production of vancomycin at the concentration above 7.5%. In comparison, maltose did not decrease the production of vancomycin up to the concentration of 20%. When the mixture of glucose and maltose was used in the ratio 1:3 to 1:4, the highest production of vancomycin was achieved. When glucose concentration was set at 3.0%, catabolite repression could not be observed up to total sugar concentration of 16.0%. Fermentation was carried out using commercial hydrolyzed starch composed of glucose, maltose, maltotriose and maltotetraose, The initial glucose concentration was set at 3.0% and subsequent oligosaccharide consumption was monitored by checking their supernatant with HPLC. During initial cultivation for 38 hour, glucose was the sole carbon source leading to rapid growth. After cell growth stopped, the maltose and glucose concentrations increased due to degradation of maltotriose and maltotetraose, but glucose level was maintained at around 3.0%. After 70 hour fermentation, maltose slowly converted to glucose, and vancomycin production continued during the period.