• 제목, 요약, 키워드: Water Intake

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여대생의 건강체력과 비만에 대한 물과 커피 섭취량과의 관계 (Relationship between water and coffee intake on Health-related Physical Fitness and obesity of women's university student)

  • 이루리;고유선
    • 한국응용과학기술학회지
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    • v.37 no.4
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    • pp.649-658
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    • 2020
  • 본 연구는 여대생 900명을 대상으로 물 섭취량과 커피 섭취량에 따른 건강체력 및 비만에 대한 차이를 알아보고자 하였다. 측정은 건강체력요인 체력에 근력(악력, 배근력), 근지구력(윗몸일으키기),유연성(앉아앞으로굽히기) 심폐지구력(하버드스텝)을 측정하였고, 체성분 측정기기 Inbody를 이용하여 신체조성(세포내액, 세포외액, 단백질, 무기질, 체수분량, 근육량, 제지방량, 체지방량)과 비만(BMI, 체지방률, 복부지방률, 비만도)의 각 항목을 측정하였다. 자료처리는 SPSS를 이용하여 이원변량분석과 일원변량분석을 실시하였다. 그 결과 건강체력과 비만에 대한 물과 커피 섭취량 집단 간 상호작용은 나타나지 않았다. 각 독립변인 별 일원변량분석을 실시한 결과 건강체력요인 중 체력요인은 물과 커피 섭취량에 따른 유의미한 차이는 나타나지 않았다. 그러나 신체조성(세포내액, 단백질, 무기질, 체수분량, 근육량, 제지방량)에서 물7잔 이상 섭취 집단이 1~4잔 섭취 집단보다 유의미하게 높았으며, 커피는 3~4잔 섭취 집단이 미섭취 집단에 비하여 유의미하게 높았다. 비만요인의 경우 물 섭취량에 따라 유의미한 차이는 나타나지 않았지만, 커피의 경우 비만도에서 3~4잔 섭취 집단이 미섭취 집단에 비하여 비만도가 높게 나타나, 커피는 물과 달리 비만과 관련이 있음을 알았다. 차후 물과 커피와 같은 다양한 음료 섭취에 대한 성별, 연령대별 차이에 관한 연구가 진행되어 진다면 보다 나은 건강을 위한 개인별 특성에 따른 수분 섭취방법으로 활용될 수 있을 것이다.

관개용수 공급체계 변경을 통한 하천의 수질개선 (Water Quality Improvement in the River through Reformation of Irrigation Water Supply Systems)

  • 이광야;김해도;이종남;박종훈
    • 한국수자원학회:학술대회논문집
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    • pp.540-545
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    • 2006
  • The objective of the study is to assess the water quality improvement resulted from the rearrangement of the irrigation water supply systems at Mankyeong River and Ansung Chun basin. There is a mixed type of watershed composed of urban and rural areas in the region. The water intake facilities for agricultural use such as reservoir, weir and pumping station are generally located at upstream river where the water quality maintains relatively clean. However, this study focuses on moving the water intake to downstream and rearranging the irrigation water supply system, then investigating how effective they are for water quality improvement in the river. When the water intake is moved downstream, the stream flow is increased as much as the amount of irrigation water that is to be taken upstream. The augmented flow which is frequently referred to as environmental flow can function as dilution water for improving the quality of polluted water that is originated from the wastewater in tributaries.

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Experimental study of dynamic interaction between group of intake towers and water

  • Wang, Haibo;Li, Deyu;Tang, Bihua
    • Earthquakes and Structures
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    • v.6 no.2
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    • pp.163-179
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    • 2014
  • Dynamic test with scaled model of a group of intake towers was performed to study the dynamic interaction between water and towers. The test model consists of intake tower or towers, massless foundation near the towers and part of water to simulate the dynamic interaction of tower-water-foundation system. Models with a single tower and 4 towers were tested to find the different influences of the water on the tower dynamic properties, seismic responses as well as dynamic water-tower interaction. It is found that the water has little influence on the resonant frequency in the direction perpendicular to flow due to the normal force transfer role of the water in the contraction joints between towers. By the same effect of the water, maximum accelerations in the same direction on 4 towers tend to close to each other as the water level increased from low to normal level. Moreover, the acceleration responses of the single tower model are larger than the group of towers model in both directions in general. Within 30m from the surface of water, hydrodynamic pressures were quite close for a single tower and group of towers model at two water levels. For points deeper than 30m, the pressures increased about 40 to 55% for the group of towers model than the single tower model at both water levels. In respect to the pressures at different towers, two mid towers experienced higher than two side towers, the deeper, the larger the difference. And the inside hydrodynamic pressures are more dependent on ground motions than the outside.

대두 이소플라본 섭취가 흰쥐에서 미로수행능력과 뇌 중 Acetylcholinesterase 활성에 미치는 영향 (Effect of Soy Isoflavone Intake on Water Maze Performance and Brain Acetylcholinesterase Activity in Rats)

  • 오현경;김선희
    • Journal of Nutrition and Health
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    • v.39 no.3
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    • pp.219-224
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    • 2006
  • This study was performed to determine the effect of soy isoflavones on brain development and function in rats. Forty Sprague-Dawley male rats were provided diets containing different levels of soy isoflavones for 6 weeks; 0 ppm (control), 50 ppm (low isoflavone intake; LI), 250 ppm (medium isoflavone intake; MI) and 500 ppm (high isoflavone intake; HI). Learning ability was evaluated by a Y-shaped water maze and the activity of acetylcholinesterase in brain was assayed after decapitation. Food intake and body weights as well as weights of brain, liver, spleen, heart and kidney showed no significant difference among the four groups, which means 500 ppm of isoflavones is safe. In the water maze test, the frequency of error counted when rats entered one end of the alley without platform was significantly lower in the HI group than in the control group, and the escape latency as swim time taken to escape on the hidden platform was significantly shorter in the HI group than in the LI and control groups. The activity of acetylcholinesterase of the brain was significantly higher in the HI and MI groups than in the control group. Therefore, the results indicate that isoflavones may improve the cognitive function without adverse effects.

A Study on the Water Resources Assessment for Irrigation Scheme in Malawi

  • AHN, SungSick;Kim, Jin-Hong
    • International Journal of Advanced Culture Technology
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    • v.6 no.3
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    • pp.178-186
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    • 2018
  • Generally, in terms of the development of irrigation scheme, the efficient water resource management that supplies the irrigation water in consideration of the required time and accurate quantity to grow the crop should be conducted. The water resource assessment should precede to supply the irrigation water efficiently. The water resources assessment is divided into the water requirement analysis and the water availability assessment. In case of Korea, the major crop is paddy rice unlike crops of Africa, such as sugarcane, maize, and cassava, etc. Because it is not familiar with the method for upland irrigation development in tropical area, it needs to know the water resources assessment for irrigation scheme development about these crops. The Natama Scheme in Chiradzulu District of the Southern Malawi was selected as study area, which has tropical climate. From the collected meteorological data, the evapotranspiration was analyzed by Penman-Monteith Method and the effective rainfall was analyzed by USDA Soil Conservation Service Method. This study displays the results that for study area, the evapotranspiration varies from 2.80 mm/day to 5.51 mm/day and the effective rainfall varied from 2.1mm to 149.0mm. According to the selected crop (Green Maize, Dry Maize), the unit water requirement (UWR) and water demand (WD) considering the irrigation efficiency, irrigation time and irrigation area were estimated to be $0.00122m^3/s/ha$ and $0.0122m^3/s$ respectively. For the water availability assessment, the runoff of Natama scheme was calculated by specific yield method. The water availability was evaluated through reviewed differences of discharge between $Q80_{intake}$ and Total WD, and the irrigation water can be supplied sufficiently in the existing 10ha of Natama scheme. As a result of reviewing the extensibility of irrigable area, total WD of scheme is $0.02313m^3/s$, and $Q80_{intake}$ is $0.02387m^3/s$ ($Q80_{intake}$ > Total WD). Therefore, Natama scheme can be extended from 10 ha to 17 ha in the dry season in consideration of the $Q80_{intake}$.

상수원수 수질개선을 위한 취수장 전염소 투입에 관한 연구 (Prechlorination at Water Intake for the Quality Improvement of Raw Water)

  • 김대현;황수옥;정은재;신창수;유영범;홍승관
    • 한국물환경학회지
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    • v.27 no.1
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    • pp.110-114
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    • 2011
  • In this paper, in order to eliminate Limnoperna fortunei inhabiting the water conduction pipeline, prechlorination at the intake station was employed to improve the degradation of water quality due to the high pH of raw water taken at the downstream of Paldang Dam, algal growth, etc.. With the prechlorination concentration of 1.0mg/L at the intake station, the pH in the water well at the treatment plant decreased by 0.4, and with 1.5mg/L, by 0.6. Also, it eliminated Chlorophyll-a by about 95%, and the population of algae by about 49%. Such disinfection by-products (DBPs) as Trihalomathanes (THMs), Haloacetic Acids (HAAs), and Chloral Hydrate (CH) were under the quality standard for potable water, showing no change by the prechlorination, while raising the prechlorination rate from 1.0 up to 1.5mg/L, the DBPs in the water well increased by 1.5 to 3.1 times. As a consequence of testing Kyungan Stream, a branch stream flowing into Lake Paldang, the prechlorination (0.57mg/L, 1.14mg/L, 1.71mg/L) had no effect of eliminating the taste and odor compounds and total organic carbon (TOC) which is the DBPs precursor. As for the efficiency of Geosmin elimination by the rates of prechlorination and powder activated carbonation (PAC), it was found that the higher the concentration of PAC was (30ppm>20ppm>10ppm), the higher the efficiency was; the higher the rate of prechlorination was, the lower the efficiency by PAC was. Therefore, when taste and odor occur from raw water, suspending prechlorination at the intake or lowering the rate was proved to be more effective in eliminating the taste and odor compounds by PAC.

WATER DRINKING BEHAVIOUR OF STEERS FED EITHER FRESH CUT FORAGE OR FIRST CUT HAY

  • Sekine, J.;Morita, Z.;Oura, R.;Asahida, Y.
    • 아세아태평양축산학회지
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    • v.1 no.3
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    • pp.157-161
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    • 1988
  • To study the effect of moisture content of the diet on drinking behaviour and the amount of water drunk, observations were made on 8 Holstein steers fed either fresh cut forage or first cut hay. The observations were made in a barn with a mean temperature of about $13^{\circ}C$. Drinking occurred mainly within 3 hours after feeding for the steers fed hay, while those fed soilage drank casually. Frequency of drinking (F) was related to the dry-matter concentration (DMC, %) of herbage: F = 0.47 (${\pm}0.09$) DMC - 6.5, $SE={\pm}0.4$, r = 0.86, P<0.01. Intake of drinking water for each 100 kg of live weight (IDW/100kg) for steers fed soilage was related to the dry-matter concentration: IDW/100kg = 0.55 (${\pm}0.06$) DMC - 8.7, $SE={\pm}0.3$, r = 0.94, P<0.01. The intake of water in each drinking period for animals fed fresh forage was curvilinearly related to the drinking frequency; for the hay-fed steers there was a negative linear relationship. When the drinking frequency for steers fed the fresh forage increased to the same as that observed for the hay, water intake in each drinking period was the same as found for the hay-fed steers.

Practical Experiences with Corrosion Protection of Water Intake Gates in Mekong River

  • Phong, Truong Hong;Tru, Nguyen Nhi;Han, Le Quang
    • Corrosion Science and Technology
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    • v.7 no.6
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    • pp.328-331
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    • 2008
  • Corrosion behaviour of water intake gate steel structures with different protective measures was investigated. Five material alternatives were taken for investigation, including: imported and recycled stainless steel, carbon steel with hot zinc spraying, painting and composite coatings. Results of corrosion rate for carbon steel, SUS 304, hot zinc spray coats in three water systems of Mekong river basin (saline, blackish and fresh) were also presented. Corrosion rate of carbon steel decreased with decreasing salinity in the investigated water environments. Meanwhile, these values for zinc coated steel, behaved by another way. Environmental data for these systems were filed and discussed in relation with corrosion characteristics. Method of Life Cycle Assessment (LCA) was applied in materials selection for water intake gate construction. From point of Life Cycle Cost (LCA) the following ranking was obtained: Zinc sprayed steel < Recycled stainless steel < Composite coated steel < Painting steel < SUS 304 From investigated results, hot zinc spray coating has been applied as protective measure for steel structures of water intake systems in Mekong river basin.

인공함양 원수확보를 위한 돌망태 보의 저류 및 취수성능에 관한 연구 (Water Storage and Intake Performance of Gabion Weirs during Recharge)

  • 한일영;김규범
    • 지질공학
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    • v.29 no.4
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    • pp.393-403
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    • 2019
  • 취수보의 저류성능은 유량과 수심의 관계로 평가될 수 있다. 돌망태 취수보의 유량과 수심의 관계는 채움재의 물리적 특성에 따라 달라진다. 본 연구에서는 인공함양 원수확보를 위한 돌망태 취수보의 저류성능을 평가하는데 활용할 기존의 방류량 산출식들을 검토하였다. 채움재의 물리적 특성을 실험변수들과 관계식으로 표현한 기존의 방류량 산출식은 유량과 수심의 관계를 잘 표현하였다. 또한 채움재의 평균입경은 수심확보와 간접취수에 영향을 미치기 때문에 저류성능 뿐 아니라 취수성능에도 중요한 인자임을 알 수 있었다.