• 생물환경조절학회지
• /
• 제26권2호
• /
• pp.146-150
• /
• 2017

본 연구는 식물공장에서 미나리 재배시 명/암주기와 암기시간 동안의 상대습도 조절이 미나리의 생육과 품질에 미치는 영향을 알아보고자 수행하였다. 정식 후 30일째에 수확하여 생육 및 품질을 비교하였을 때 상대습도 60/90%(명/암기) 처리가 60/60% 처리보다 지상부 생체중이 뚜렷이 증가하였다. 상대습도60/60% 처리에서 명기가 연장될수록 지상부 생체중이 증가하였지만 60/90% 처리에서는 16/8h 처리에서 지상부 생체중이 가장 높았으며, 20/4h, 22/2h 순이었다. 팁번의 발생은 상대습도 60/90%에서는 명/암주기 16/8h로 처리했을 때 1.4%로 매우 낮았으나, 명기 시간이 연장된20/4h, 22/2h 처리에서 각각 15.5% 30.3%로 급격히 증가하였다. 상대습도 60/60%에서는 명/암주기 16/8h에서도 팁번의 발생이 15.5%로 높았으며 20/4h, 22/2h 처리에서는 25% 이상 높게 나왔다. 줄기의 경도는 상대습도 60/90%, 명/암주기 16/8h 처리에서 가장 낮았다. 잎의 무기성분은 명기시간이 연장될수록 감소하였지만 Ca의 함량은 상대습도 60/60%, 명/암주기 22/2h 처리를 제외하고는 유의한 차이가 없었다.

• 한국환경과학회지
• /
• 제22권9호
• /
• pp.1171-1180
• /
• 2013

Recent climate change has led to fluctuations in agricultural production, and as a result national food supply has become an important strategic factor in economic policy. As such, in this study, panel data was collected to analyze the effects of seven meteorological elements and using the Lagrange multipliers method, the fixed-effects model for the production of five types of food crop and the seven meteorological elements were analyzed. Results showed that the key factors effecting increases in production of rice grains were average temperature, average relative humidity and average ground surface temperature, while wheat and barley were found to have positive correlations with average temperature and average humidity. The implications of this study are as follow. First, it was confirmed that the meteorological elements have profound effects on the production of food crops. Second, when compared to existing studies, the study was not limited to one food crop but encompassed all five types, and went beyond other studies that were limited to temperature and rainfall to include various meterological elements.

• 한방안이비인후피부과학회지
• /
• 제20권2호통권33호
• /
• pp.199-212
• /
• 2007

Objective : The purpose of this clinical research was to investigate the effects of Seunggaltang on patients with atopic dermatitis. Methods : Thirteen patients were treated with Seunggaltang and ten patients were treated with placebo for 8 weeks. We observed skin humidity, skin sebum,, transepidermal water loss, skin melanin, skin erythema, total IgE class and number of allergen. And Clinic Index of Atopic Dermatitis(Extent, Intensity, Subjective symptoms, Total score) was used to evaluate the effects of Seunggaltang. Statistical analysis was performed by using paired sample T-test. Statistical significance was achieved if the probability was less than 5%(P<0.05). The result were as follows : 1. Statistically, Seunggaltang didn't showed significant effect on skin humidity, skin sebum, skin transepidermal water loss, skin melanin and skin erythema. 2. Statistically, Seunggaltang showed significant effect on Clinic Index of atopic dermatitis. 3. Statistically, Seunggaltang didn't showed significant effect on total IgE class and number of allergen. 4. Before and after treatment, the results of blood test and urinalysis were normal. Conclusion : We speculate that Seunggaltang has some therapeutic effects in mitigating the symptoms of atopic dermatitis.

• Applied Biological Chemistry
• /
• 제49권2호
• /
• pp.103-107
• /
• 2006

비타민 정제 중의 지용성 비타민의 저장 습도 및 저장 온도에 따른 저장 안정성을 연구한 결과 개봉을 하지 않은 상태에서는 저장 온도에 상관없이 상당히 안정한 것으로 나타났다. 흥미로운 사실은 일부 지용성 비타민들이 개봉을 한 상태에서는 습도에 매우 민감하다는 사실이었는데, 지용성 비타민 중 분말형태로 제조하기 위하여 acetate form으로 존재하는 비타민 A acetate와 비타민 E acetate는 수분에 아주 민감하다는 사실을 확인할 수 있었다. 이들 지용성 비타민은 개봉을 한 상태에서는 습도에 매우 민감하여 그 손실 속도가 매우 빨라지는 경향을 나타내었다. 또한 비타민 정제의 경우 수분이 가소제로 작용하여 비타민 정제 중의 성분들의 mobility를 증진시킴으로써 비타민의 손실 속도가 빨라지는 것으로 판단된다. 따라서 이러한 결과로 볼 때 tablet형태의 복합 비타민제에 존재하는 지용성 비타민의 경우 저장 온도보다는 저장 습도에 유의를 하여야 할 것으로 판단된다.

• 한국생물환경조절학회:학술대회논문집
• /
• 한국생물환경조절학회 2000년도 학술발표논문집 Proceeding of Bio-Environment control
• /
• pp.51-54
• /
• 2000

• 한국환경과학회지
• /
• 제22권12호
• /
• pp.1599-1610
• /
• 2013

In order to verify the healing effect in the variety of effects according to fountain type, anion which is the representatives factor of healing, as the center of case studies which in Gwanghwamun(Ground fountain), Cheonggyecheon(Waterfall) and Myeongdong(Formative fountain). According to fountain type, the anion distribution as follow, figures typically$ 15,721{\pm}419ea/cm^3$, Formative fountain $40,190{\pm}788ea/cm^3$, Waterfall $4.480{\pm}290ea/cm^3$ and ground fountain $2.492{\pm}180ea/cm^3$. It is usually exceed to the distribution in natural green, which is $1070{\sim}2100ea/cm^3$. The interrelation between air temperature, relative humidity, wind speed and relative humidity, and wind speed is that, the relative humidity is directly proportional to wind speed and inversely proportional to temperature. As the temperature goes up, the distribution of anion goes down. And as the wind speed and relative humidity goes up, the distribution of anion decrease sharply. The result of interrelation between fountain type and the anion distribution is that, the distance of water falling is directly proportional to the anion distribution in the formative fountain and inversely proportional in the ground fountain. And the distribution of anion is largest in formative fountain. The distribution of anion in ground fountain is lower than in formative fountain, but it is far more than in natural greenery. And as the distance from fountain increase, the distribution of anion goes down.

• Journal of Biosystems Engineering
• /
• 제11권1호
• /
• pp.52-63
• /
• 1986

This study was performed to find out drying characteristics and develop drying model for the design of an efficient dryer or drying system of red peper. The basic model which describes drying phenomenon of red pepper was firstly established, and drying tests were conducted at 14-different drying conditions. In this test, the effects of drying air temperature and relative humidity on the rate of drying were undertaken. Finally, a new drying model based on these experimental results was developed to describe the drying characteristics of red pepper. The results from this study may be summarized as follows. 1. Drying constant of the basic model established from Lewis' experimental model and diffusion equation was theoretically deduced as a function of moisture content and inner-temperature of red pepper. 2. From the results of drying tests, drying air temperature was found to have the greatest effect on the rate of drying. However, the effect of temperature was small for the condition of high relative humidity, and for low temperature, the effect of relative humidity was found to be large even though the range of relative humidity was low. 3. Modified Henderson equation was found to be better than Chung equation as the EMC model for the estimation of the equilibrium moisture content of red Pepper. 4. Constant-rate drying period did not exist in the red pepper drying test. And falling-rate drying period was divided into three distinct phases. Drying rate was dependent on the moisture content, the inner-temperature of red pepper and the change of physical property due to drying. 5. Drying constant increased with decrease of free moisture content, but it decreased at the end of the drying period. Also, drying constant was dependent on the drying air temperature and relative humidity. 6. The new drying model developed in this study was found to be most suitable in describing the drying characteristics of red pepper. Therefore, it may be concluded that drying time could be accurately estimated by the new drying model.

• 한국재료학회:학술대회논문집
• /
• 한국재료학회 2011년도 춘계학술발표대회
• /
• pp.57.1-57.1
• /
• 2011

The effects of relative humidity on the properties of the porous $ZrO_2$ ceramics were investigated in terms of the curing behavior of phenolic resin as a binder. The $ZrO_2$ powders containing 5wt% of phenolic resin were conditioned in a consistent chamber condition at a temperature of $50^{\circ}C$ and different humidity levels (25, 50, 75, and 95%) for 1 h. The exposure of humid atmosphere caused changes of density and microstructure in the green bodies. The higher level the powders were exposed to the humid atmosphere, the lower green density was obtained and the more irregular microstructure was observed due to aggregation by the curing of phenolic resin. After firing, the porosity of specimens has risen from 35.7% to 38.1% and Young's modulus has declined in response to the variation of green density. These results could be explained by the degree of resin cure which was associated with the area under the exothermic peak enclosed by a baseline of DSC thermogram curve. Also, the curing behavior of phenolic resin according to relative humidity has been confirmed by decrease of ether groups which have interacted with the phenolic-OH group and the hexamine as a curing agent. Consequently, it could be demonstrated that increase the relative humidity during fabrication of porous $ZrO_2$ diminished the compaction and properties of specimens after firing owing to curing of phenolic resin.

• 한국입자에어로졸학회지
• /
• 제5권2호
• /
• pp.53-62
• /
• 2009

In this study, the continuous monitoring of the concentration of PM-10 atmospheric particulate matter using beta ray attenuation method was compared with gravimetric method from September, 2006 to August, 2007. On the effects of the PM-10 concentration and mass difference by relative humidity and precipitation were considered. The result showed that the measurement error between beta ray method and gravimetric method are within -3~6% in average, which means PM-10 concentration data with beta ray method are relatively comparable. The current study also shows that the high PM-10 concentration events are mainly due to haze, Asian dust, and high relative humidity and the PM-10 mass concentration is closely related with relative humidity and precipitation events. Based on daily mean data, the PM-10 increases as relative humidity increases up to 70~80%, then decreases over 80% due to the precipitation. However, the distinct measurement discrepancy was not shown between beta ray method and gravimetric method based on current results. Consequently, this study shows that the collocated measurement in different instrument is essential in order to quantify the accuracy of PM-10. Furthermore, the more comprehensive and spatially distributed comparison is needed and this is remained for future study.

• 분석과학
• /
• 제25권3호
• /
• pp.164-170
• /
• 2012

시아노아크릴레이트 훈증법은 비다공성 표면에 유류된 잠재지문을 현출할 때 효과적이다. 본 연구는, 진공챔버에서 시아노아크릴레이트를 훈증할 때 온도, 습도, 훈증 방법 등이 잠재지문 현출에 미치는 영향을 확인한 후 최적 반응 조건을 찾는데 있다. 진공챔버의 온도가 높을수록 시아노아크릴레이트 증발량은 증가했지만, 지문 융선에서 시아노아크릴레이트의 중합반응은 $30^{\circ}C$에서 가장 잘 일어났다. 상대습도가 40%, 50% 조건에서는 좋은 상태의 지문이 현출되었지만, 30%보다 낮거나 60%보다 높은 조건에서는 지문 융선에서 시아노아크릴레이트 중합반응 속도가 느려졌다. 진공챔버에서 시아노아크릴레이트를 자연적으로 증발시키는 방법보다는 $OMEGA-PRINT^{TM}$ dispersal pads와 수산화나트륨을 포함한 솜을 이용해 시아노아크릴레이트 훈증하는 방법이 효과적이란 사실을 확인할 수 있었다. 진공챔버에서 시아노아크릴레이트 처리시간은 상대습도에 비해 큰 영향을 주지 않았다.