• 대한영양사협회학술지
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• 제27권4호
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• pp.276-292
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• 2021

There is a dearth of Korean studies on dehydration, one of the health risks for adult women. This study analyzed the subjects of the 2016~2018 National Health and Nutrition Examination Survey (KNHANES) to investigate the relationship between nutrient intake ratios and sedentary time in dehydrated women. Body mass index and waist circumference in the dehydrated group (DG) were significantly higher than the normal group (NG). Intake of other liquids in the DG was significantly higher than in the NG, but total water intake in the DG was significantly lower than in the NG. Compared to the 600 sedentary minutes or more per day group, the odds ratio of dehydration was significantly higher in the less than 300 sedentary minutes per day group (1.871 [95% CI: 1.579~2.215], P<0.001). Compared to the drinking over 6.0 cups of water per day group, the odds ratio of dehydration was significantly higher in the 3 cups or fewer per day (OR [95% CI] is 1.198 times [1.019 to 1.408], P<0.05), and 6.0 cups or fewer group (OR [95% CI] is 1.162 times [1.018 to 1.326], P<0.05). The results of this study showed that the total water intake was relatively lower in the ≥600 sedentary minutes per day group compared to the 300 sedentary minutes per day group, making them more vulnerable to dehydration. The nutrient intake ratios were higher in the dehydration group than in the normal group. In conclusion, emphasis should be placed on the importance of hydration and nutrition education for adult women in the workplace.

• Journal of Korean Biological Nursing Science
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• 제14권2호
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• pp.139-146
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• 2012

Purpose: This study was done to evaluate the effects of a fluid intake intervention on increasing fluid intake and ameliorating dehydration status in elders admitted to long-term care hospitals. Methods: A nonequivalent control group, pretest and posttest design was used. The experimental group of 39 participants received the 4-week intervention while the control group of 38 participants received routine care. Outcome variables were daily fluid intake and physiological indexes such as blood urea nitrogen and creatinine ratio (BUN/Cr), urine specific gravity (USG), and urine color. Results: After the intervention to increase fluid intake, there were statistically significant increases in daily fluid intake, normal BUN/Cr, and USG in the experimental group. However, a statistically significant improvement in normal urine color was not found for either group. Conclusion: The findings of this study demonstrated that the fluid intake intervention improved hydration status of the experimental group participants. Consequently, it was confirmed that the intervention is considered to be effective in preventing dehydration which occurs frequently in older adults in long-term care facilities and, thus this intervention may contribute to preventing various health issues resulting from dehydration.

• 공업화학
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• 제3권3호
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• pp.507-515
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• 1992

본 연구에서는 소성 dolomite와 수증기계의 열화학 반응을 축열식열교환기에 응용하기 위해 충전층 형태의 실험장치에서 축열 및 방열특성에 관한 연구를 수행하였다. 실험 data는 수화반응온도 $150-400^{\circ}C$, 탈수반응온도 $700-800^{\circ}C$ 및 수증기 유량 294, 430, 567 g/hr의 실험조건에서 얻은 결과이다. 본 연구의 실험범위내에서는 소성 dolomite중 MgO가 수화반응 과정중 수화되지 않음을 알았다. 따라서 소성된 dolomite중 MgO는 불활성 물질로 취급할 수 있다. 또한 율속단계는 충전층의 입구와 벽면으로부터, 출구와 중심쪽으로 반응이 진행되므로 반응율속보다는 열전달율속으로 진행된다고 생각된다.

• 한국세라믹학회지
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• 제28권10호
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• pp.751-756
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• 1991

Continuous microstructural changes on heating of hardened paste prepared from primary clinker of CA2 composition was studied. On heating period, several characteristic shrinkages and microstructural changes took place in the specimen due to the dehydration and recrystallization of calcium aluminates without regard to the accelerative shrinkage resulted from sintering. Though micropores formed by dehydration decreased with recrystallization of calcium aluminates, micropores formed by plate-type gibbsite in the hydrates were maintained up to the temperature at which CA2 becomes main phase and had influence to the microstructure of the final clinker.

• 대한의용생체공학회:의공학회지
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• 제9권1호
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• pp.47-60
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• 1988

N-n-Propylacrylamide는 n-propyl bromide와 acrylamide로 부터 합성하였고, 합성된 N-n-propylacrylamide를 THF용매속에서 개시제로 AIBN을 사용하여 $60^{\circ}C$에서 acrylamide와 공중합시켰다. 그리고 합성된 단량체와 공중합체는 NMR과 IR에 의하여 확인하였다.

• 대한화학회지
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• 제36권6호
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• pp.791-795
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• 1992

압력하에서 전해질을 구성하는 이온의 한계당량전도도를 구하는데 TATB법을 적용하였다. TATB법을 적용하여 구한 이온의 한계당량전도도와 물의 점성도로부터 고전적인 hydrodynamics에 기초를 둔 이온의 Stokes 반지름을 구하였다. Stokes 반지름으로부터 수화된 이온의 반지름을 구하기 위하여 Nightingale법을 사용하였으며, 이온의 보정된 반지름과 이온의 결정반지름으로부터 수화수를 구하였다. 압력이 증가함에 따라 이온의 수화수는 아주 작은량의 감소경향을 보이고 있으며 이러한 경향은 Horne의 pressure-induced dehydration으로 설명되었다. 본 연구의 결과를 Nakahara 등의 결과와 비교하여 보면, 본 연구에서 계산된 $K^+$와 $Cl^-$ 이온의 수화수는 Nakahara 등의 같은 이온들에 대한 수화수의 두배에 가까왔다. 그리고 Kollman 등의 결과와도 비교하여 보아 고압하에서 이온의 수화수를 구하는데 TATB법과 Nightingale법을 적용하여 비교적 좋은 결과를 얻을 수 있음을 알았다.

• Journal of the Korean Data and Information Science Society
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• 제26권4호
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• pp.1007-1015
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• 2015

The purpose of this study was to explore the prevalence of hypertension in Haiti and to describe regional characteristics, and thus to speculate Haitian specific regional risk factors. This is a descriptive and comparative study. Subjects were 145 male/female Haitians, who aged between 30 and 59 and have lived in rural areas, had their hypertension indicators being screened. Data were analyzed with descriptive statistics, t-test and ANOVA. More than four fifth of the subjects (82.8%) showed pre-hypertensive or moderate to severe hypertensive condition. 65.5% of the total had abnormal pulse pressure ($PP{\geq}50$) and 13.8% of the sample showed tachycardia (Heart $Rate{\geq}100$). Female Haitian tended to have higher diastolic blood pressure and faster heart rate than male Haitian. The residents who lived in Part 5-1 area with less accessibility to drinking water tended to have higher systolic and diastolic pressure. Hydration status of Haitians was highly considered as an affecting factor on the distribution of hypertension as evidenced by different level of accessibility to drinking water.

• Childhood Kidney Diseases
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• 제13권1호
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• pp.21-25
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• 2009

2008년 말 발생한 멜라민 파동은 멜라민에 오염된 분유를 섭취한 영아들에서 요로계 결석이 발생한 것으로부터 비롯되었다. 멜라민 관련 요로계 결석의 위험인자는 3세 미만의 나이, 많은 멜라민 섭취량과 탈수, 요산의 요 배설량 증가 등의 일반적인 요로계 결석 위험인자의 동반이다. 멜라민 관련 결석은 주 성분이 요산이므로 수분 공급과 소변 알칼리화의 보존적인 치료로 회복되는 경우가 대부분이다.

• 기본간호학회지
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• 제1권2호
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• pp.207-218
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• 1994

A validation of the nursing diagnosis 'fluid volume deficit' was completed by using the diagnostic content validity method. Articles pertaining to fluid volume depletion were reviewed to identify the signs and symptoms used to describe the nursing diagnosis. The topics addressed in the articles included hypovolemic shock, hemorrhage, trauma, fluid balance, hydration, burn injury, thirst, dehydration. A validation instruments was constructed of 52 signs and symptoms. A validation tool was examined by expert nurses group who work on intensive care unit, kidney transplantation unit, internal medicine and general surgery unit. The study sample rated the signs and symptoms on a scale from one to five, evaluating their relevance to this diagnosis. Of the 52 signs and symptoms on the validation tool, 10 were categorized as critical indicators and 34 were categorized as defining characteristics.

• Bulletin of the Korean Chemical Society
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• 제24권10호
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• pp.1437-1443
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• 2003

Thermal decomposition of hydrated surface layer of $Mg(OH)_2$ at $500^{\circ}C$ in vacuum turned non-porous MgO into porous one with high surface area of around $270 m^2$/g. Most of its surface area, 74 %, was from micropores, and rest of it was from mesopores in wedge-shaped slits, exhibiting bimodal size distribution centered around 30 and 90${\AA}$. Rehydration followed by subsequent dehydration at $300 ^{\circ}C$ in dynamic vacuum further raised the surface area to 340 $m^2$/g. Fraction of microporous surface area was increased to 93%, and the shape of the mesopores was modified into parallel slits with a specific dimension of 32 ${\AA}$. Application of $Fe_2O_3$ over MgO via iron complex formation did not alter the pore characteristics of MgO core, except slightly increased pore dimension. Over the course of the modification, $Fe_2O_3$ stayed on the surface possibly via spill-over reaction.