• Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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• 제3권3호
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• pp.169-175
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• 1999

2,4-Dinitrophenol(DNP) is a metabolic uncoupler that prevents cells from creating energy for growth and it has been suggested that the availability of sodium ions may be important in mitigating the effects of uncouplers. Accordingly, the degradation of DNP was investigated using activated sludge which had been adapted to mineralize DNP. After the acclimation of the activated sludge, the effect of sodium ions on the toxicity of high concentrations(80 to 100mg/L) of DNP was investigated over a sodium ion concentration range of 9.3$\times$10-5 to 94mM. The concentration of sodium ions in the activated sludge mixed liquor seemed to have little effect on the DNP toxicity. However, a lack of sodium in the grwoth media resulted in a reduction of the DNP degradation rate by a bacterial isolate from the activated sludge culture identified as Nocardia asteroides.

• Nutrition Research and Practice
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• 제9권6호
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• pp.644-649
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• 2015

BACKGROUND/OBJECTIVES: Targeting consumers who consume lunches at their worksite cafeterias would be a valuable approach to reduce sodium intake in South Korea. To assess the relationships between socio-demographic factors, consumer satisfaction, attitudes, barriers and the frequency of sodium-reduced meal intake. SUBJECTS/METHODS: We implemented a cross-sectional research, analyzing data from 738 consumers aged 18 years or older (327 males and 411 females) at 17 worksite cafeterias in South Korea. We used the ordinary least squares regression analysis to determine the factors related to overall satisfaction with sodium-reduced meal. General linear models with LSD tests were employed to examine the variables that differed by the frequency of sodium-reduced meal intake. RESULTS: Most subjects always or usually consumed the sodium-reduced meal (49%), followed by sometimes (34%) and rarely or never (18%). Diverse menus, taste and belief in the helpfulness of the sodium-reduced meal significantly increased overall satisfaction with the sodium-reduced diet (P < 0.05). We found importance of needs in the following order: 1) 'menu diversity' (4.01 points), 2) 'active promotion' (3.97 points), 3) 'display of nutrition labels in a visible location' (3.96 points), 4) 'improvement of taste' (3.88 points), and 5) 'education of sodium-reduction self-care behaviors' (3.82 points). CONCLUSION: Dietitians could lead consumers to choose sodium-reduced meals by improving their taste and providing diverse menus for the sodium-reduced meals at worksite cafeterias.

• Bulletin of the Korean Chemical Society
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• 제8권2호
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• pp.79-83
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• 1987

The reduction of a series of 1-substituted benzyl-3-cyanoquinolinium ions (p-$cH_3$, H, p-Br, m-F, p-CN) by sodium borohydride has been investigated. In all cases the products from these reactions were found to be 1, 2-dihydroquinolines over 82% yields. Rates of reduction were measured in basic condition and in solvent system consisting of 4 parts of isopropyl alcohol and 1 part of water by volume. Second order rate constants were obtained for these reactions. When the ratio of [$OH^-$] to [$BH_4^-$] becomes large the observed rate constants ($K_{obs}$) decrease by a small factor. Reaction scheme and rate law are discussed. Bronsted ${\alpha}(=\frac{d\;In\;k}{d\;In\;K})$ obtained by using the value of equilibrium constant K, which was obtained previously, was not 0. Instead, a value of 0.36 was obtained which indicated that the reduction by borohydride was structure-dependent according to the Marcus formalism even though the reaction rate was close to the diffusion limit.

• Applied Biological Chemistry
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• 제45권4호
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• pp.207-211
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• 2002

포도의 가식성 코팅물질로 methyl cellulose에 별도로 미생물 생육억제 효과가 있는 n-capric acid isopropyl ester와 sodium nitrate를 spray한 다음 EPS(expanded polystylene) tray에 0.05mm PE(polyetlylene) 필름으로 wrapping한 후 $30^{\circ}C$에서 16일간 저장하면서 품질을 분석하였다. 중량감소율에서 상품가치를 잃게 되는 7%수준이 되는 시점이 대조구는 6일인 반면 methyl cellulose+n-capric acid isopropyl ester처리구는 9일로 차이를 보였다. 대조구의 산도는 처리구에 비하여 저장기간이 길어짐에 따라서 감소율이 높게 나타났다. Vitamin C 함량의 경우 대조구는 저장초기에 비하여 저장 16일 후 68.4% 감소한 반면 methyl cellulose + sodium nitrate와 methyl cellulose + n-capric acid isopropyl ester 처리구는 각각 51.5와 49.8%의 감소를 나타내었다. 경도변화로는 대조구가 가장 크게 감소하여 저장 16일째 초기에 비하여 44.2% 감소한 반면 methyl cellulose + sodium nitrate와 methyl cellulose + n-capric acid isopropyl ester 처리구는 각각 26.5와 23.2%로 나타나 큰 차이를 보였다. 저장기간 중 sodium nitrate와 n-capric acid isopropyl ester 처리가 총균수와 효모수의 억제에 효과가 있었으며 관능검사의 기호도에서는 methyl cellulose 처리구보다 methyl cellulose + sodium nitrate 처리구와 methyl cellulose + n-capric acid isopropyl ester 처리구가 높게 나타났다.

• Bulletin of the Korean Chemical Society
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• 제27권5호
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• pp.783-785
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• 2006

• Bulletin of the Korean Chemical Society
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• 제20권2호
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• pp.237-240
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• 1999

• 대한지역사회영양학회지
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• 제16권4호
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• pp.473-487
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• 2011

We attempted to define the sources of sodium intake for the Korean population at prepared dish level to provide a basis for developing sustainable nutrition policies and feasible programs for sodium intake reduction. Dietary intake data from 2008 and 2009 Korea National Health and Nutrition Examination Survey was used in the analysis for sodium intake sources. Sodium intake from individual dish consumed by each subject was calculated and used in delineating major sodium sources at dish and dish group level for sub-populations of different sex and age. Also, sodium intake was compared between eaters and non-eaters of some specific dish groups with considerable contribution to total sodium intake. The number of subjects included in the analysis was 18,022 and mean sodium intake was 4,600 mg/capita/day. Major sources of sodium intake at dish group level were in the following order: kimchi (1125 mg, 24.5%), noodles (572 mg, 12.4%), soups (488 mg, 10.6%), stews (399 mg, 8.7%), and cooked rice (284 mg, 6.2%). The magnitude of contribution to total sodium intake by soups and stews was different by age group. Sodium intake difference between eaters and non-eaters was much larger for kimchi group (2,343 mg for male, 1,452 mg for female) than for soups or stews. Interaction between consumption of aforementioned specific dish groups and age was highly significant (p < 0.0005) for both sexes. This study revealed an importance of having not only the control over sodium content of foods/dishes, but also the customized approach for different groups of population to accomplish an appreciable reduction in sodium intake.

• Korean Chemical Engineering Research
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• 제43권2호
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• pp.324-329
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• 2005

본 연구에서 SNCR 공정에서 사용되는 NO의 농도는 500 ppm이며, 환원제로 Urea를 사용하였다. 또한 첨가제로 NaOH(sodium hydroxide), $Na_2CO_3$(sodium cabonate), $NaNO_3$(sodium nitrate), HCOONa(sodium formate), $CH_3COONa$(sodium acetrate)를 이용하여 온도와 첨가제에 따른 NO 저감 효율을 측정하고자 하였다. 이때의 NO 저감 온도의 범위는 $650-1,050^{\circ}C$이다. 환원제만 사용하였을 경우, NO의 저감 효율은 44%까지 증가하였으며, 환원제와 첨가제(NaOH)를 0.5 mol/L와 1 mol/L 사용하였을 경우, NO 저감 효율은 25%와 74%이상 증가하였다. 첨가제를 사용하지 않았을 경우보다 첨가제를 사용하였을 경우 NO의저감 효율은 증가하였다. 또한 NaOH>$Na_2CO_3$>$NaNO_3$>HCOONa, >CHCOONa 첨가제의 순으로 효율이 우수하였다. 첨가제를 사용할 경우 약 $900^{\circ}C$에서 $1,050^{\circ}C$의 온도범위에서 NO저감 효율이 65% 이상으로 나타났다. 온도 창의 범위는 약 $250^{\circ}C$의 범위로 나타났으며, 최저 효율은 약 20%이며 최대효율은 약 74%정도로 나타났다.

• 대한지역사회영양학회지
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• 제26권4호
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• pp.270-279
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• 2021

본 연구는 대구시 삼삼급식소 종사자 80명, 일반급식소 종사자 80명의 총 160명을 대상으로 2020년 9월부터 10월까지 급식소별 종사자의 짠맛과 단맛 선호도, 급식 맛 인식도, 행동변화단계, 식행동과 급식소의 나트륨 및 당류 저감화 실천도를 비교·분석하였다. 1. 조사대상자의 연령은 삼삼급식소 종사자가 일반급식소 종사자보다 50대 이상의 비율이 높았으며, 근무처는 삼삼급식소는 병원(43.8%)과 관공서(42.5%)의 비율이 높았고, 일반급식소는 학교(55.0%)와 산업체(31.3%)의 비율이 높았으나, 직위와근무경력은 두 급식소 간 유의한 차이가 없었다. 2. 짠맛과 단맛 선호도는 삼삼급식소 종사자와 일반급식소 종사자 간 유의한 차이가 없었으나 싱겁게 먹기를 실천하거나 유지하는 단계에 있는 종사자의 비율은 더 높았다. 또한 급식의 짠맛과 단맛 정도는 삼삼급식소 종사자보다 일반급식소 종사자가 더 짜고, 더 달게 인식하는 것으로 나타났다. 3. 짜게 먹는 식행동 조사결과, 삼삼급식소 종사자는 일반급식소 종사자에 비해 '국이나 국수류의 국물을 남김없이 먹는다'는 식행동 점수가 낮았으나, 당류에 관한 식행동은 두 급식소 종사자 간 유의한 차이는 없었다. 4. 나트륨 저감화 실천도는 일반급식소보다 삼삼급식소에서 높은 것으로 나타났다. 두 급식소 간 실천도에서 특히 차이가 큰 항목은 '음식의 간을 전반적으로 싱겁게 하려고 노력하기', '국·찌개의 국물 양을 적게 제공하기', '가공완제품을 사용하기보다 직접 조리하기', '양념해서 오래 재워두지 않고 제공 직전 양념하기', '양념의 짠맛을 줄이고 단맛, 신맛 추가하기', '김치양을 적게 제공하기', '소금, 장류 줄이고 천연조미료 사용하기' 등이었다. 5. 급식소의 당류 저감화 실천도는 삼삼급식소가 일반급식소보다 높았다. 특히 '한 끼 양념과 소스의 종류를 2가지 이하로 식단 구성하기', '첨가당 함량이 높은 식재료 많이 구매하지 않기', '양념 대신 식재료 본연의 맛을 살려 조리하기', '첨가당 함량 높은 식재료 사용 줄이기', '소스를 버무리지 않고 직접 찍어 먹도록 별도 제공하기' 항목에서 삼삼급식소가 일반급식소에 비하여 실천도가 유의하게 높았다. 이상의 결과, 삼삼급식소는 일반급식소에 비하여 급식의 나트륨 저감화 실천도가 높았을 뿐 아니라 당류 저감화 실천도도 높은 것으로 나타났다. 따라서 향후 단체급식소의 나트륨 및 당류 저감화를 보다 확대하고 정착하기 위해서 국가 차원의 지원과 인센티브를 지속적으로 제공하는 것이 필요한 것으로 사료된다.

• 한국축산식품학회지
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• 제34권5호
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• pp.591-596
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• 2014

This study evaluated the effect of sodium diacetate and sodium lactate solutions for reducing the cell count of Pseudomonas spp. in frankfurters and hams. A mixture of Pseudomonas aeruginosa (NCCP10338, NCCP10250, and NCCP11229), and Pseudomonas fluorescens (KACC10323 and KACC10326) was inoculated on cooked frankfurters and ham. The inoculated samples were immersed into control (sterile distilled water), sodium diacetate (5 and 10%), sodium lactate (5 and 10%), 5% sodium diacetate + 5% sodium lactate, and 10% sodium diacetate + 10% sodium lactate for 0-10 min. Inoculated frankfurters and ham were also immersed into acidified (pH 3.0) solutions such as acidified sodium diacetate (5 and 10%), and acidified sodium lactate (5 and 10%) in addition to control (acidified distilled water) for 0-10 min. Total aerobic plate counts for Pseudomonas spp. were enumerated on Cetrimide agar. Significant reductions (ca. 2 Log CFU/g) in Pseudomonas spp. cells on frankfurters and ham were observed only for a combination treatment of 10% sodium lactate + 10% sodium diacetate. When the solutions were acidified to pH 3.0, the total reductions of Pseudomonas spp. were 1.5-4.0 Log CFU/g. The order of reduction amounts of Pseudomonas spp. cell counts was 10% sodium lactate > 5% sodium lactate ${\geq}$ 10% sodium diacetate > 5% sodium diacetate > control for frankfurters, and 10% sodium lactate > 5% sodium lactate > 10% sodium diacetate > 5% sodium diacetate > control for ham. The results suggest that using acidified food additive antimicrobials, as dipping solutions, should be useful in reducing Pseudomonas spp. on frankfurters and ham.