• The Korean Journal of Ceramics
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• 제5권1호
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• pp.25-29
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• 1999

Complex viscosities of dense alumina slurries over 45% volume density measured with the oscillating method were correlated well with Casson model. Among several monosaccharides and disaccharides studied here, fructose and sucrose showed good rheological properties in making dense alumina slurry plastic compared to other monosaccharides and disaccharides like glucose, galactose, arabinose, xylose and maltose. Sucrose content or additional water content in dense alumina slurry with sucrose contributed to the plasticity of the slurries.

• The Korean Journal of Ceramics
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• 제5권2호
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• pp.104-109
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• 1999

Rheological properties of dense slurries over 45 volume % with different monosaccharides and disaccharides were checked in order to increase the solid content of dense slurries without sacrificing plasticity using creep testing method. Strain in creep test showed good correlations with Burger model which is expressed as an exponential function of time. Among several monosaccharides and disaccharides studied here, fructose and sucrose were most effective in making dense alumina slurry plastic than other monosaccharides and disaccharides like glucose, galactose, xyloss and maltose. In the case of dense alumina slurry with sucrose, sucrose content or additional water content enhanced to the plasticity of the slurries.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제25권6호
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• pp.510-518
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• 2022

Purpose: Recently, great interest has been focused on dietary fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) for the treatment of functional abdominal pain (FAP). Several meta-analyses, including those on the adult population, have been published, potentiating its role. However, pediatric studies are scarce. We aimed to evaluate the effect of a low-FODMAP diet on the severity of FAP in children. Methods: This clinical trial included 50 patients aged 3-18 years with irritable bowel syndrome and FAP that were not otherwise specified. The patients were instructed to receive a low FODMAP diet guided by a dietitian. The primary outcome was the percentage of responders after 2 months of dietary intervention compared with baseline. Other outcomes included changes in stool consistency and quality of life (QoL) scores using the KIDSCREEN-10 questionnaire, and weight-for-age z-scores. Results: After the dietary intervention, 74% of patients showed more than 30% lower pain intensity, as examined using the Wong-Baker Faces pain rating scale. Their QoL significantly improved, and patients have gained weight. Conclusion: A low FODMAP diet can improve pain intensity and QoL among children with functional abdominal pain, with no detrimental effects on body weight.

• 공업화학
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• 제31권3호
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• pp.299-304
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• 2020

나노입자는 많은 화학합성에서 중요한 촉매역할을 한다. 촉매로 이용되는 나노입자를 합성할 때 colloidal synthesis를 많이 활용하고 있다. Colloidal synthesis를 이용해 나노입자를 합성할 경우 환원제, capping agent, shape directing agent 등이 촉매에 surface poisoning을 일으켜 촉매의 특성이 낮아질 수 있으며 합성 및 분리 과정 중 유해폐기물의 발생한다. Colloidal synthesis에서 사용되는 첨가제들의 양을 줄여 합성할 수 있는 새로운 나노입자를 합성법을 개발하여 은나노입자를 합성하였다. 결정화 기술을 이용하여 환원제, capping agent의 양을 줄일 수 있고 더욱이 합성된 나노입자 표면의 흡착되는 물질의 양을 줄여 surface poisoning을 낮출 수 있었다. 환원제로는 단당류와 이당류를 이용하여 surface poisoning이 거의 없는 은 나노입자는 resazurin의 산화환원 반응의 촉매로 이용할 수 있어 은 나노입자를 이용한 촉매 반응의 메커니즘을 분석하였다.

• 한국유기농업학회지
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• 제5권1호
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• pp.87-99
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• 1996

Cultural conditions for mass production of the antagonistic bacteria, Bacillus subtills CAP134 against pathogens causing major airborne diseases to apple tree, effect of temperature, pH, carbon and nitrogen source in the culture broth were investigated. The bacterial growth was most vigorous when the temperature and pH of the culture broth was 30~$35^{\circ}$C, and 7, respectively. As for carbon source, dextrose was best followed in order by dextrose(monosaccharides)>sucrose(disaccharides)$\geq$saccharose(di-saccharides)>starch (polysaccharides). Among different sugars, bacterial growth was favored by in the order of brown, black and white sugars, indicating that the bacterial growth might be promoted by the minor elements presented as impurities in the less purified sugars. As for nitrogen source, organic forms were better to bacterial growth than inorganic forms, that is polypeptone was best followed in order by soy sauce, soybeen milk and inoganic nitrogens. Differences in bacterial growth among different forms of inorganic nitrogen were negligible.

• 한국식품영양과학회지
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• 제28권6호
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• pp.1251-1255
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• 1999

The sugar alcohols are useful alternatives to sucrose in confections because they provide desirable taste but lessen the potential risks for dental caries. The effects of sugar alcohol and their interaction on starch pasting properties were determined by the viscoamylograph with the concentration of 30%, 20%, 10% sugar alcohol in 1% CMC. The disaccharides, lactitol, maltitol, and isomalt, delayed pasting more than did monosaccharides, sorbitol and xylitol. With regard to the solubility in water, sorbitol and xylitol are more soluble than sucrose, maltitol and lactitol are almost equal and isomalt is less soluble than sucrose. Sorbitol and xylitol were highest on gelatinization. But their retrogradation occurred faster than other sugar alcohols. Lactitol and maltitol decreased gel strength more than did sucrose and other sugar alcohols.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2002년도 생물공학의 동향 (X)
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• pp.477-480
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• 2002

A thermostable xylanase from Thermotoga maritima (Xyn B) cleaves several pNP-glycosides of monosaccharides. We found that the initial product of the cleavage of pNP-xyloside (pNP-Xy1) was a disaccharide, not xylose, indicating that xylosyl unit of pNP-Xyl was transglycosylated to another pNP-Xyl. We determined that the disaccharide was xylobiose which has the linkage of the ${\beta}$ 1-4, and described the reaction mechanism of the Xyn B. Also, we produced the several pNP-glycosides and propyl-disaccharides from the transglycosylation of Xyn B with varial glycosides and/or 1-propanol. All reaction products were purified by column chromatography (Toyo-pearl HW-40C, 45 cm${\times}$2.5 cm or 45 cm ${\times}$ 2.5 cm${\times}$ 2). The isolated products were analyzed by means of 1D and 2D NMR.

• 대한소화기학회지
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• 제72권5호
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• pp.252-257
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• 2018

This guidance is an updated version of the irritable bowel syndrome (IBS) guidelines based on evidence-based medicine. IBS is a common chronic gastrointestinal syndrome that occurs in approximately 10% of the population and causes chronic abdominal pain as well as bowel habit changes, such as stool frequency or consistency. The final diagnosis of IBS is based on the exclusion of organic diseases that would explain the symptoms and the absence of endoscopic abnormalities. IBS can reduce the quality of life and cause a major disease burden, such as repeated examinations and continuous drug use, by mistaking organic diseases including malignancy. The major changes are as follows: 1) when to perform a colonoscopy under the impression of IBS; 2) effect of a low-fermentable oligosaccharides, disaccharides, monosaccharides, and polyol diet; 3) impact of probiotics in IBS; and 4) role of antibiotics in IBS. The Korean Society of Neurogastroenterology and Motility recently updated these guidelines to support physicians for qualified medical services and reduce the socioeconomic burden of IBS.

• 한국식품영양학회지
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• 제12권5호
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• pp.470-477
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• 1999

The purpose of this study was to choose prinicipal food components contained in diet foods and food additives used for manufacturing processed foods and elucidate their in vivo effects on the growth pattern of Helicobacter pylori. To do this the antibacterial effects of various sources of carbon nitrogen and mineral as an effect agent on Helicobacter pylori were first assessed based upon bacterial growth degree. results show that the source of carbon tested had different effects on bacterial growth of Helicobacter pylori. It was revealed that a promotional effect of monosaccharides resulted in enhanced growth of Helicobacter pylori compared with disaccharides and polysacchrides, in particular glucose was observed to be most effective in growth of Helicobacter pylori among monosaccharides teste whereas mannose to hinder the growth of Helicobacter pylori. Polyols such as sorbitol mannitol maltitol and xylitol was however observed to show no promotion or suppression effect on growth of Helicobacter pylori. Apart from these the sources of amino acid and inorganic nitrogen were chosen and tested to assess the promotion or suppression effect of nitrogen sources on growth of helicobacter pylori. It was found that amino acid such as lysine showed its promotion effect on the growth of Helicobacter pylori while arginine (NH4)2SO4 and NH4Cl showed no effect on its growth. Ammoia and urea were however observed to have a positive effect on the growth of Helicobacter pylori. Among these effect agents lysine and methionine were revealed to show the most positive effect on growth of Helicobacter pylori. Minerals such as MgSO4 KH2PO4 and MgCl2 appered to exert their positive growth effects whereas CaCl2 and CaSo4 had a little effect. In addition FeSO4 FeCl2 and FeCl3 brought suppression on the growth of helicobacter pylori. In studies of the growth of Helicobacter pylori by food additives ascorbic acid showed extreme suppression on its growth,. Sodium nitrate and sodium chloride were also found to be of negative effect on the growth of Helicobacter pylori in rder of degree whereas tocopherol had nothing to do with microbial growth.

• Nutrition Research and Practice
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• 제17권6호
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• pp.1201-1210
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• 2023

BACKGROUND/OBJECTIVES: The dietary intake of foods with fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAP) is known to adversely affect patients with irritable bowel syndrome (IBS). However, the effects of FODMAP have been studied predominantly among Western populations. This study aimed to identify foods high in FODMAP content which form a part of the Korean adult diet and obtain basic data for the preparation of IBS guidelines. SUBJECTS/METHODS: An online survey of 1,000 adults from the general population in the age group of 20 to 40 years was performed. Data from 787 participants (men, 386; women, 401) were analyzed. The general characteristics of the participants, health status, IBS diagnosis using the Rome III diagnostic criteria, semi-quantitative food frequency questionnaire findings, and food items causing symptoms were analyzed. RESULTS: Overall, 169 participants (21.5%) had IBS. The contribution of the FODMAP nutrients in both IBS and healthy groups was as follows: fructan > lactose > excess fructose > sorbitol > mannitol > galacto-oligosaccharides (GOS). The fructan intake was 4.6 ± 2.2 g/day and 4.3 ± 2.5 g/day in the IBS and healthy groups (P = 0.014), respectively. In the IBS group, the ratio of the intake of fructan to the total FODMAP intake was 39.5%, 29.8%, and 5.8% through onions, garlic, and bananas, respectively. CONCLUSIONS: Fructan was the FODMAP nutrient most consumed by Korean adults. Therefore, given the difference in the dietary habits of each country's population, the dietary guidelines for IBS should be country specific.