• Title, Summary, Keyword: watering

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랫트에 있어서 절수, 절식 및 절수 절식이 혈액학 및 혈액생화학적 PARAMETERS에 미치는 영향에 관한 연구

  • 한상섭;송창우;이치호
    • Toxicological Research
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    • v.7 no.1
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    • pp.51-59
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    • 1991
  • The purpose of the present study was to investigate the effects of non-watering, fasting and non-watering fasting for 16-17 hrs on haematological and biochemical parameters in SD rats. 1. Liver weight was decreased in the order of in the fasting group, non-watering fasting group and non-watering group in both sexes. 2. In fasting group and non-watering fasting group, haematologic parameters of male (HGB and MCH) and femal (MCHC) were trends to decrease compared with normal feeding & watering group. 3. In the differential leucocyte counts, there were no significant differences compared with noraml feeding % watering group.

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Study on the Bottom Watering for Growing of Tobacco Seedling I. Effect of Bottom Watering on Seedling Growth arid Temperature of Seedbed (담배육묘를 위한 저면관수 연구 I. 저면관수가 묘의 생장 및 묘상 온도에 미치는 영향)

  • 반유선;한종구;신승구;류익상
    • Journal of the Korean Society of Tobacco Science
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    • v.14 no.1
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    • pp.42-47
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    • 1992
  • This study was conducted to determine the effects of the bottom watering method on seedling growth, temperature of seedbed and working hours. The results of compared conventional watering with bottom watering were as follows: 1. The lowest and highest temperature on surface of bottom watering seedbed were higher about 2-3$^{\circ}C$ and 3-5$^{\circ}C$ than those of conventional plot, respectively. 2. At 30 days after seeding, flesh and dry weight of seedling in bottom watering seedbed were heavier about 121% and 62% than those of seedling in conventional plot, respectively, while dry ratio of that was lower about 30.2%. 3. Plant height of transplanting seedling in bottom watering seedbed was higher about 4-5cm than that of seedling in conventional plot. Otherwise, ratio of top to root and length of root were not significant. 4. Working hours of bottom watering for growing seedling were reduced 40.9% and 53.4% in primary and secondary seedbeds as compared with those of conventional plot, respectively.

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Development of Automatical Soybean Sprouting Equipment for Medium Amount Production by Using Multiple Siphons (복수 싸이펀을 이용한 중량생산용 콩나물 자동재배기 개발)

  • 김만중;백승화;최용배;김형욱
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.28 no.4
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    • pp.886-889
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    • 1999
  • To develope the soybean sprouting equipment(a type of cabinet) for medium amount(one bucket; 10~13kg) production of soybean sprouts, the watering system was made of four siphons and four the bottle necked water tank. Diameter of four siphons used for development of the watering system were 8, 13, 17 and 21mm, respectively and their water exhausting volumes were 40, 92, 154, 524ml/sec, respectively. The watering system can be automatically watered 524ml/sec without electric supply. The soybean sprouting equipment is consisted of four the bottle necked water tanks with the four siphons and six sprouting buckets with net shaped bottom for water draining. The soybean sprouting equipment with the watering system may be produced more than one box a day in the condition of 6~7 watering times a day at 25~30oC.

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DEVELOPMENT OF AUTOMATIC AIR BLAST WATERING MACHINE FOR MUSHROOM GROWING

  • Choe, K.J.;Park, H.J.;Park, K.K.;Lee, S.H.;Yu, B.K.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • pp.613-622
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    • 2000
  • Watering operation for oyster mushroom growing houses is regarded as drudgery and time consuming farm operation for growers. Most of mushroom growing beds in oyster mushroom growing houses are designed as two-row with four floor beds, therefore the watering and ventilation between the bed floors are much difficult for farmers because of its structural design. The study aimed to reduce the watering operation and improve the mushroom growing environment through the humidification and air supply on mushroom growing beds. Results showed that appropriate size of nozzle is between 0.8~0.5ml/s for the humidification and higher than the 2.0ml/s for the watering. The optimum water supply pressure was regarded as between 1.0~2.0MPa and the uniform distribution of droplet on the bed showed on air flow speed of 14m/s. The prototype was equipped with twin nozzle with. the humidification nozzle of 0.85ml/s and watering nozzle of 5.0ml/s, and the air blast fan with the air speed of 10m/sec in each air spout. In the field test in a practical scale mushroom growing house, it was well operated dependant on the set desire by a electric control unit. The machine can be practically used as air blast watering and air blast humidification for oyster mushroom growing farms without manual.

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Study on the Evapotranspiration of Crisphead Lettuce by the Weighing Lysimeter (Weighing Lysimeter에 의한 결구상치의 증발산량 조사연구)

  • 김시원;김선주;노희수
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.28 no.4
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    • pp.41-48
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    • 1986
  • This study was fulfilled by the weighing lysimeter method at the experimental farm of KonKuk University from April to June of 1986 to investgate the amount of evapotranspiration ( ET-lettuec )by the growing periods, evapotranspiration ratio, amount of watering per one time, days of intermission and soil moisture extraction pattern of the crisphead lettuce cultivated in the clay loam soil by different watering points of pFl.7, pF2.O, pF2.7. The results obtained are summar ized as follows : 1.The total evapotranspiration(ETlettuce) of the pFl.7 treatment plot was 358,9mm., 314.9mm in the pF2.O plot and 281.8mm in the pF2.7 plot, therefore the total ETlettuec increased with the difference of 33mm-44mm by the decrease of watering point. 2.The daily maximum ETlettuce by the watering points was 7.66mm, 6:54mm, 5.98mm, respectively in the last ten days of May, and the mean daily ETlettuce during the growing season by the watering points of pFl.7, pF2.O and pF2.7 was 5.44mm(384.5g), 4.77mm(337.2g) and 4.27mm(301.8g), respectively. 3.The evapotranspiration ratio showed maximum value in the middle of May which was the beginning of mid-season stage, and the mean evapotranspiration ratio during the total growing period was 1A7, 1.29, 1.15 by the watering points. 4.The days of watering intermission by the watering points of pFl.7, pF2.O and pF2.7 was 1.0day, 2.9days and 12.Sdays, respectively. 5.The yield of the crisphead lettuce by the watering treatments showed very high significance, and the pF2.O was confirmed as a optimum watering point. 6.The soil moisture extraction pattern(SMEP) of the pF2.0 treatment plot in the initial stage was 85.6% in the 1st and 2nd soil layer and 14.4% in the 3rd and 4th layer, and in the midseason stage, the moisture extraction proportion of the under layer accounted for 34.7%which showed that the root elongated to the lowest soil layer, and there was no difference of the SMEP between the mid-season and late-season stage. 7.The correlation coefficient between the ETlettuce and yield of lettuce by the three watering points was.739, which showed the significance of 5%.

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The Study on the Cooling Effects of the Atrium Interiors for the Roof Watering System by a Scaled Model (축소모형을 이용한 지붕담수시스템을 활용한 아트리움 실내의 냉각효과에 관한 연구)

  • Chung, Yu Gun
    • KIEAE Journal
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    • v.9 no.6
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    • pp.51-56
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    • 2009
  • The most important advantages of atrium buildings are to allow the abundant natural lighting and outside views. However, the abundant lighting frequently causes to increase a cooling load in summer. The roof watering systems are useful to reduce the cooling load and save the energy. This study aims to investigate the effects of the roof watering system in atrium through the scaled model experiments. For the study, the 1/20 scaled model was made and tests were performed under the clear sky conditions through August 24 to september 7 in 2008. The model size was $45{\times}45{\times}60(cm)$ and depth of roof water was 3(cm). As results, the thermal effects of two types of atrium(roof opening, and roof and front opening,) were evaluated through the experimental points and conditions. It is expected to use the results for the next research to develop the practical roof watering systems for atrium.

Optimal Conditions for the Growth of Soybean Sprouts by Ozone Water Watering (오존수 살수(撒水)에 의한 콩나물의 성장조건 최적화)

  • 김일두;김순동
    • Journal of the East Asian Society of Dietary Life
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    • v.11 no.3
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    • pp.219-224
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    • 2001
  • This study was conducted to investigate the optimal conditions for the growth of soybean sprouts by ozone water watering. Optimal conditions for ozone water watering of soybean sprouts during cultivation at 2$0^{\circ}C$ were evaluated with ozone concentration(0.1~O.5 ppm) and watering frequency(1~9 times) by response surface methodology. The optimal conditions for growth of soybean sprouts were ozone concentrations of 0.20~0.32 ppm, ozone treatment frequency of 3.0~4.4 times. Germination rates, hypocotyl weights and hypocotyl lengths in the soybean sprouts cultivated under the optimal conditions increased by 13.3, 10.1 and 11.9%, respectively, whereas root weights decreased by 89.0%.

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Dewatering Filtrate Treatment with Center Well Depth of Secondary Clarifier in Small Sewage Treatment Plant (소규모하수처리시설의 이차침전조 내통길이 변화를 통한 탈수여액의 처리)

  • Choi, Jung-Su;Kim, Hyun-Gu;Lee, Dong-Ho;Joo, Hyun-Jong
    • Journal of Korean Society of Environmental Engineers
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    • v.35 no.10
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    • pp.694-702
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    • 2013
  • The purpose of this study is to evaluate a de-watering filtrate treatment and the possibility of securing biological treatment capacity by changing the structure of the secondary clarifier. Accordingly, the column test was conducted to determine the effect of polymer in the de-watering filtrate on sludge sedimentation. Also, the characteristics of de-watering filtrate processing was evaluated through batch test and continuous processing operation. The results showed that sludge settling velocity increased with higher polymer concentration, and that effluent SS concentration was found to decrease. Regarding processing characteristics of de-watering filtrate, the removal efficiency of TSS and TBOD5 increased as the length of secondary clarifier was longer. Also, comparing injections into anoxic tank and secondary clarifier, de-watering filtrate by continuous infusion treatment process showed stability in both conditions. Therefore, by modifying the structure of secondary clarifier, efficient processing of de-watering filtrate is expected to be possible and processing capacity of small sewage treatment plants is considered to be improved.

Expression of NAC transcription factor is altered under intermittent drought stress and re-watered conditions in Hevea brasiliensis

  • Luke, Lisha P.;Sathik, M.B. Mohamed;Thomas, Molly;Kuruvilla, Linu;Sumesh, K.V.
    • Journal of Plant Biotechnology
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    • v.44 no.2
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    • pp.142-148
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    • 2017
  • Drought stress is one of the important factors that restrict the expansion of Hevea brasiliensis cultivation to non-traditional regions experiencing extreme weather conditions. Plants respond to drought stress by triggering expression of several drought responsive genes including transcription factors which in turn trigger expression of various downstream signalling pathways and adaptive networks. Expression of such drought responsive genes may revert back to their original level upon re-watering. However, no reports are available on such phenomenon in Hevea and hence, this study was initiated. For this purpose, NAC transcription factor (NAC tf) was chosen as candidate gene. Its expression levels were monitored under intermittent drought as well as irrigated conditions in two clones (RRII 105 and RRIM 600) of H. brasiliensis with contrasting tolerance level. Copy number of NAC tf was found similar in both the clones. Expression of NAC tf was found highly up-regulated in RRIM 600 (a relatively drought tolerant clone) than in RRII 105 (a relatively drought susceptible clone) throughout the drought incidences which upon re-watering, reached back to its original levels in both the clones. The study indicated the existence of an association between expression of NAC tf and drought tolerance trait exhibited by the tolerant clone RRIM 600. The study also proves the influence of drought and re-watering on the leaf photosynthesis and expression of NAC tf in H. brasiliensis.

Development of Soybean Sprouter Using Principle of Siphoning (싸이폰원리를 이용한 콩나물 자동재배기 개발)

  • Kim, Joong-Man;Choi, Yong-Bae;Yang, Dong-Kun
    • Korean Journal of Food Science and Technology
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    • v.29 no.3
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    • pp.460-463
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    • 1997
  • One of the major problems in automation of soybean sprouter is watering method. This study was conducted solve this problem. The soybean sprouter consisted of three parts: water-receiving chamber with siphon, water spraying bowl and sprout cultivating bowl. It functions as automatic-watering without manpower and electric power, and is not noisy and has duration. Watering interval, watering time and amount could be controlled by regulation of dropping times/min from a tap. Chlorine contained in tap water is naturally decreased during its (water) storage in the water receiving chamber. Among three types of sprouter (siphon type, wet paper type and water pump type) the siphon type can be used at $25{\sim}30^{\circ}C$ that is the optimum temperature for soybean sprout.

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