• 대한기계학회논문집 C: 기술과 교육
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• 제1권1호
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• pp.83-90
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• 2013

본 연구는 정수처리공정에서 사용하는 염소소독으로 취급이 용이하며, 기존 액화염소를 대체할 수 있는 현장발생형 고농도 차아염소산나트륨 발생장치를 국산화 개발하는 것이다. 이 장치는 포화소금물을 이용한 전기화학적 특성으로 고농도(12%)의 차아염소산나트륨을 생성하는 것으로, 저농도(0.8%)의 차아염소산나트륨 발생장치보다 전류효율 38.7 % 높이고, 소금사용량 54.6 %와 클로레이트 함량 97.3%을 저감하는 장치이다.

• 대한수의학회지
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• 제14권1호
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• pp.23-27
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• 1974

Concentration of total protein, bilirubin, sodium and potassium in blood sera, and thymol turbidity of race horses, 78 males and 57 females aging from 2 to 5 years, were estimated. The results obtained were as follows: 1. Serum of race horses was low in protein concentrations as mean values of $5.48{\pm}0.77$ g/100ml. 2. Serum bilirubin was in normal range as mean values of total bilirubin, direct bilirubin and indirect bilirubin were $1.05{\pm}0.57$, $0.12{\pm}0.05$ and $0.93{\pm}0.58$ mg/100ml, respectively. 3. Mean value of serum thymol turbidity was $1.41{\pm}0.72$ S-H unit. 4. Mean values of serum sodium and potassium of race horses from Australia were $143{\pm}8.7$ and $3.85{\pm}0.53$ mEq/liter, respectively, and mean values of serum sodium and patassium of race horses from Japan were $142{\pm}9.4$ and $3.58{\pm}0.60$ mEq/liter, respectively.

• 한국세라믹학회지
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• 제50권5호
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• pp.341-347
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• 2013

Kaolin-based membranes with a pore size of 0.30-0.40 ${\mu}m$ were successfully prepared by a simple pressing route using low-cost starting materials, kaolin and sodium borate. The prepared green bodies were sintered at different temperatures ranging between 900 and $1200^{\circ}C$. The sintered membranes were characterized by X-ray diffraction, mercury porosimetry, scanning electron microscopy, and capillary flowmetry. It was observed that the porosity decreased with an increase in both the sintering temperature and the sodium borate content, whereas the flexural strength increased with an increase in both the sintering temperature and the sodium borate content. The air flow rate decreased with an increase in the sodium borate content. The typical porosity, flexural strength, and specific flow rate of the kaolin-based membrane sintered with 5 wt% sodium borate at $1100^{\circ}C$ were 37%, 19 MPa, and $1{\times}10^{-3}L/min/cm^2$, respectively, at a p of 30 psi.

• Geomechanics and Engineering
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• 제21권4호
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• pp.337-348
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• 2020

Tropical organic soils having more than 65% of organic matters are named "peat". This soil type is extremely soft, unconsolidated, and possesses low shear strength and stiffness. Different conventional and industrial binders (e.g., lime or Portland cement) are used widely for stabilisation of organic soils. However, due to many factors affecting the behaviour of these soils (e.g., high moisture content, fewer mineral particles, and acidic media), the efficiency of the conventional binders is low and/or cost-intensive. This research investigates the impact of different constituents of cement-sodium silicate grout system on the compressibility behaviour of organic soil, including settlement and void ratio. A microstructure analysis is also carried out on treated organic soil using Scanning Electron Micrographs (SEM), Energy Dispersive X-ray spectrometer (EDX), and X-ray Diffraction (XRD). The results indicate that the settlement and void ratio of treated organic soils decrease gradually with the increase of cement and kaolinite contents, as well as sodium silicate until an optimum value of 2.5% of the wet soil weight. The microstructure analysis also demonstrates that with the increase of cement, kaolinite and sodium silicate, the void ratio and porosity of treated soil particles decrease, leading to an increase in the soil density by the hydration, pozzolanic, and polymerisation processes. This research contributes an extra useful knowledge to the stabilisation of organic soils and upgrading such problematic soils closer to the non-problematic soils for geotechnical applications such as deep mixing.

• Journal of Animal Science and Technology
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• 제63권4호
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• pp.725-739
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• 2021

Many consumers are concerned about the high levels of salt intake owing to the accompanied risk of chronic diseases. Due to this dietary concern, the food industry has recommended the reduction of salt content in many products. However, the addition of salt to meat products improves their quality and sensory properties, including saltiness, color, juiciness, and texture. Because quality deteriorations could induce decreased sensory scores owing to salt reductions, the challenges involved in improving the quality of reduced-salt meat products have been addressed. During the development of low-salt meat products, it is important to reduce sodium content and address the problems that arise with this reduction. Modified salt, organic acids, amino acids, nucleotides, hydrocolloids, high-pressure, ultrasound, electric pulsed field, and irradiation have been suggested as strategies to replace or reduce sodium content, and sensory scores could be improved by these strategies. Therefore, when developing a low-salt meat product, several perspectives must be considered and the latest technologies that could resolve this problem should be adopted.

• Nutrition Research and Practice
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• 제14권5호
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• pp.501-518
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• 2020

BACKGROUND/OBJECTIVES: Sodium intake is positively associated with blood pressure, which may increase the risk for cardiovascular disease (CVD). Therefore, we assessed the disease burden of CVD attributable to sodium intakes above 2,000 mg/day and prospectively investigated the association between dietary/urinary sodium levels and the risk of all-cause and CVD-mortality using the Korea National Health and Nutrition Examination Survey (KNHNES). SUBJECTS/METHODS: A total of 68,578 and 33,113 participants were included for comparative risk assessment (CRA) analysis and mortality analysis, respectively, and mean follow-up time for mortality was 5.4 years. CRA analysis was used to quantify attributable incidences of stroke, ischemic heart disease (IHD), and deaths attributable to sodium intake between 1998 and 2016. Cox proportional hazard regression model was used to determine the association between sodium intake and all-cause and CVD-mortality. RESULTS: Mean dietary sodium intake decreased over time, reaching 3,647 mg/day in 2016. Similarly, the population attributable fractions of stroke and IHD, and the number of CVD-associated deaths attributable to high sodium intake/excretion also decreased. In terms of association with mortality, when participants were grouped into quartiles (Q) by energy-adjusted sodium intake, those in Q2 had a lower risk of all-cause mortality than those in Q1 with lower intakes. The risk of CVD-associated mortality was higher only in females with high sodium intake in Q4 than those in Q1. CONCLUSIONS: This nationwide data indicates that, in line with previous studies of multiple cohorts, both low and high sodium intakes may be associated with an increased risk of mortality; therefore, the optimal sodium intake for Koreans needs to be revised.

• 한국식품과학회지
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• 제37권5호
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• pp.730-735
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• 2005

정제어유의 산패에 영향을 줄 수 있는 요인을 피하기 위해 유화법을 이용한 알긴산 캡슐을 제조하고 캡슐을 구성하는 염화칼슘. 알긴산, 정제어유 그리고 유화제의 농도 그리고 피복물질로서의 저분자 알긴산이 캡슐의 수율에 미치는 특성을 살펴보았다. 염화칼슘 농도에 따른 캡슐의 수율은 0.5%까지는 증가하지만 그 이상의 농도에서는 변화가 없었고, 알긴산 농도는 1.25%까지 수율이 다소 증가하는 경향을 보였지만 1.5%에서 감소하였다. 내부물질의 함량이 증가할수록 캡슐의 봉입율도 높아졌고, 0.25-1.0%의 유화제 농도에서는 94%의 수율로 일정하게 관찰되었다. 이상의 결과로 가장 높은 수율을 얻기 위한 유화 캡슐화 공정의 적절한 조건을 염화칼슘: 0.5%, 알긴산: 1.25%, 내부물질: 0.75%, 유화제: 0.75%로 결정할 수 있었다. 또한 감마선에 의해 저분자화 된 알긴산을 피복물질로서 캡슐공정에 적용하였을 경우 캡슐의 수율 변화가 거의 없어 고분자 알긴산을 대체할 수 있는 가능성을 확인하였다.

• 농업과학연구
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• 제49권1호
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• pp.45-50
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• 2022

The aim of this study is to evaluate the effects of supplementation of low-energy diets with PROSOL^® (sodium stearoyl-2-lactylate) as an emulsifier on the growth performance and nutrient digestibility of growing pigs. A total of 120 crossbred ([Landrace × Yorkshire] × Duroc) growing pigs with an average initial body weight of 23.80 ± 4.87 kg were used in a 56-day feeding trial and were sorted into three dietary treatments. Each treatment utilized eight replications with five pigs per pen. The dietary treatments were as follows: PC (high, net energy diet [NE] = 2,488 kcal·kg^-1 [weeks 1 to 4] and NE = 2,477 kcal·kg^-1 [weeks 5 to 8]); NC (low, NE = 2,472 kcal·kg^-1 [weeks 1 to 4] and NE = 2,468 kcal·kg^-1 [weeks 5 to 8]); NC1 (NC + 0.05% PROSOL^® emulsifier). Growth performance outcomes were measured at the initial point and at weeks 4 and 8 while nutrient digestibility parameters were measured at weeks 4 and 8. From weeks 1 - 8, body weight and the average daily gain of the NC1 group pigs showed significant increases (p < 0.05) compared to those of the PC and NC treatment groups. At the end of the trail, pigs fed a diet containing low net energy with 0.05% of the emulsifier showed reduced feed conversion ratio (FCR) levels. However, the average daily feed intake and nutrient digestibility of dry matter and nitrogen remained unaffected throughout the experiment. In summary, the addition of a low-net-energy diet with 0.05% sodium stearoyl-2-lactylate as an emulsifier enhanced the body weight and daily gain with no adverse effects on nutrient digestibility in growing pigs.

• Animal Bioscience
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• 제37권4호
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• pp.640-654
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• 2024

Objective: The purpose of this study was to explore the effect of sodium salicylate (SS) on semen preservation and metabolic regulation in goats. Methods: Under the condition of low temperature, SS was added to goat semen diluent to detect goat sperm motility, plasma membrane, acrosome, antioxidant capacity, mitochondrial membrane potential (MMP) and metabonomics. Results: The results show that at the 8th day of low-temperature storage, the sperm motility of the 20 μM SS group was 66.64%, and the integrity rates of the plasma membrane and acrosome were both above 60%, significantly higher than those of the other groups. The activities of catalase and superoxide dismutase in the sperm of the 20 μM SS group were significantly higher than those of the control group, the contents of reactive oxygen species and malondialdehyde were significantly lower than those in the control group, the MMP was significantly higher than that in the control group, and the contents of Ca²⁺ and total cholesterol were significantly higher than those in the control group. Through metabonomics analysis, there were significant metabolic differences between the control group and the 20 μM SS group. Twenty of the most significant metabolic markers were screened, mainly involving five metabolic pathways, of which nicotinic acid and nicotinamide metabolic pathways were the most significant. Conclusion: The results indicate that SS can effectively improve the low-temperature preservation quality of goat sperm.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제45회 하계 정기학술대회 초록집
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• pp.287.2-287.2
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• 2013

We synthesized a new composite of poly sodium 4-styrenesulfonate intercalated graphene oxide for energy storage devices by controlling oxidation time in the synthesis of graphite oxide. Specific capacitance was improved from 20 F/g of the previous composites to 88 F/g of the new composite at the current density of 0.3 A/g. The capacitance retention was 94% after 3000 cycles, indicating that the new composites of high cyclic stability, prominent performance as electric double layer capacitor, and even low resistance could be an excellent carbon based electrode for further energy storage devices.