• 한국잡초학회지
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• 제15권1호
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• pp.13-18
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• 1995

담수직파(湛水直播) 논에 발생(發生)되는 괴불을 효율적(效率的)으로 방제(防除)하기 위(爲)해 괴불의 발생(發生) 생태(生態)를 조사(調査)하고 약제(藥劑)를 이용(利用)한 방제(防除) 방법(方法)을 시험(試驗)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 괴불의 발생(發生)은 적색광(赤色光)인 660nm광하(光下)에서 발생율(發生率)이 높았고 450nm인 청색광(靑色光)에서는 괴불발생(發生)이 억제(抑制)되었다. 2. 시비량(施肥量)이 적은 처리구(處理區)가 괴불의 발생량(發生量)이 높았고 비료(肥料)와 토양(土壤)의 혼화비율(混和比率)이 낮은 처리구(處理區)에서 괴불의 발생(發生)이 많았다. 3. 카바에이트계(系)와 트리아진계(系) 제초제(除草劑)가 괴불발생(發生) 억제효과(抑制效果)가 높았으나 발생(發生)된 괴불에 대(對)해서는 카바에이트계(系)는 발생(發生) 억제효과(抑制效果)가 없었고 트리아진계(系) 제초제(除草劑)는 발생전(發生前) 및 발생후(發生後)에도 높은 괴불 방제효과(防除效果)를 보였으며 쿠퍼등(等) 살균제(殺菌劑)도 괴불에 대(對)해 방제효과(防除效果)가 높았다. 4. 포장(圃場)에서의 괴볼 방제효과(防除效果)는 pyrazosulfuron molinate simetryne GR와 dimepiperate bensulfuron dimethametryn GR가 높은 괴불 방제효과(防除效果)를 보였고 담수직파(湛水直播)벼의 약해증상(藥害症狀)은 보이지 않았다.

• 대한화장품학회지
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• 제30권2호
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• pp.147-151
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• 2004

본 연구는 다양한 종류의 에멀젼에 전단응력을 가하며 그때 일어나는 에멀젼의 상 변이를 전기, 유변학적 특징을 통해 실시간으로 측정해 보는 것이다. 전기 전도도의 변화는 자체 제작한 JELLI$^{TM}$(Joint Electro-rheometer for Liquid-Liquid Inversion) 칩을 이용하였으며, 동시에 유변물성측정장치(rheometer)를 이용하여 유변물성의 변화를 측정하였다 JELLI$^{TM}$ 칩과 인조 피부를 유변물성측정장치 사이에 장착하고 그 사이에 다양한 종류의 에멀젼을 얇게 발라준 후, 일정한 전단응력을 주며 시간에 따른 저항과 점도 값의 변화를 측정하였다. O/W 제형의 경우 시간에 따라 저항 값이 커지는 경향을 보였으며 저항 값은 내부 상이 많을수록 더 급격한 변화를 나타냈다. 이때의 점도 변화를 보면, 저항 값의 변화가 클수록 점도의 변화도 큼을 볼 수 있었다. 이것은 내부 상의 파괴로 인해 외부의 힘에 저항하는 힘이 약해졌기 때문이라고 예상된다. 이런 결과를 이용하여 전단응력에 의한 에멀젼 상 변이 특성과 정도를 실시간, 정량적 비교할 수 있었다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2012년도 제43회 하계 정기 학술대회 초록집
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• pp.139-139
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• 2012

With angle resolved photoemission spectroscopy (ARPES), the surface electronic band structures of Pt3Co (111) and Pt3Ni (111) single crystals are investigated, which allow to study the bonding interaction between chemically absorbed atomic oxygen and its surfaces. The d-band electrons of subsurface TM are separated from the direct chemical bonding with atomic oxygen. That is, the TM does not contribute to direct chemical bonding with oxygen. From the density functional theory (DFT) calculations, it is identified that the main origin of improved oxygen absorption property, i.e. softening of Pt-O bonding, is due to the suppression of Pt surface-states which is generated from change of interlayer potential, i.e. charge polarization, between Pt-top and TM-subsurface. Our results point out the critical roles of subsurface TM in modifying surface electronic structures, which in turn can be utilized to tune surface chemical properties.

• Asian-Australasian Journal of Animal Sciences
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• 제23권11호
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• pp.1462-1468
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• 2010

The effects of vitamin C and vitamin E with selenium on acid-base balance and some stress hormones were evaluated during heat stress in goats. Goats, 1.5 years of age, were divided into control, heat stress and antioxidant treatment groups 1, 2 and 3. Except for the control, all groups were exposed to a temperature of $40{\pm}2^{\circ}C$ with a relative humidity of 30% for 5 h/d for 21 days in a psychrometric chamber. Rectal temperature and respiratory rates were recorded daily post exposure. Blood samples were collected on every 3rd day for estimation of plasma vitamins C and E, total antioxidant activity and hormones, and separate blood samples were taken to estimate acid-base status. The rectal temperature and respiratory rates were increased (p<0.05) in the heat stress group only. Except for pH and $pO_2$, which were increased significantly (p<0.05) other parameters of acid-base balance such as $pCO_2$, $HCO_3^-$, $TCO_2$, BEb, BEcef, PCV and Hb were significantly decreased (p<0.05) in the heat stress group. An improvement in acid-base status was noted in the antioxidant supplemented groups. Prolactin and cortisol levels were significantly (p<0.05) higher and free T3 and T4 levels were significantly (p<0.05) lower in the heat stress group. Levels of prolactin and cortisol were decreased and free T3 and T4 were increased in antioxidant treatment groups. Different levels of antioxidant supplementation resulted in similar protection against heat stress.

• 한국환경과학회지
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• 제25권8호
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• pp.1143-1153
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• 2016

Plant biomass, photosystem II (PSII) photochemical activity, photosynthetic function, and zinc (Zn) accumulation were investigated in a sorghum-sudangrass hybrid (Sorghum bicolor ${\times}$ S. sudanense) exposed to various Zn concentrations to determine the elimination capacity of Zn from soils. Plant growth and biomass of the sorghum-sudangrass hybrid decreased with increasing Zn concentration. Symptoms of Zn toxicity, i.e., withering and discoloration of old leaves, were found at Zn concentrations over 800 ppm. PSII photochemical activity, as indicated by the values of $F_v/F_m$ and $F_v/F_o$, decreased significantly three days after exposure to Zn concentrations of 800 ppm or more. Photosynthetic $CO_2$ fixation rate (A) was high between Zn concentrations of 100-200 ppm ($22.5{\mu}mol$ $CO_2{\cdot}m^{-2}{\cdot}s^{-1}$), but it declined as Zn concentration increased. At Zn concentrations of 800 and 1600 ppm, A was 14.1 and $1.8{\mu}mol$ $CO_2{\cdot}m^{-2}{\cdot}s^{-1}$, respectively. The patterns of stomatal conductance ($g_s$), transpiration rate (E), and water use efficiency (WUE) were all similar to that of photosynthetic $CO_2$ fixation rate, except for dark respiration ($R_d$), which showed an opposite pattern. Zn was accumulated in both above- and below-ground parts of plants, but was more in the below-ground parts. Magnesium (Mg) and iron (Fe) concentrations were significantly low in the leaves of plants, and symptoms of Mg or Fe deficiency, such as a decrease in the SPAD value, were found when plants were treated with Zn concentrations above 800 ppm. These results suggest that the sorghum-sudangrass hybrid is able to accumulate Zn to high level in plant body and eliminate it with its rapid growth and high biomass yield.

• Asian-Australasian Journal of Animal Sciences
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• 제18권9호
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• pp.1226-1230
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• 2005

The present investigation was undertaken to study the genetic polymorphism of the DRB3 exon 2 in 75 crossbred cattle by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. Five genotypes i.e. HaeIII-a, HaeIII-b, HaeIII-e, HaeIII-ab and HaeIII-ae were observed when the 284 bp PCR products were digested with HaeIII restriction enzyme. The corresponding frequencies of these patterns were 0.53, 0.04, 0.01, 0.38 and 0.04, respectively. Digestion with RsaI restriction enzyme resolved 24 different restriction patterns. The frequencies of these patterns ranged from 0.013 (RsaI-f, RsaI-k and RsaI-c/n) to 0.120 (RsaI-n). The results revealed that the crossbred cows belonged to the RsaI patterns namely b, k, l, a/l, d/s, l/n, l/o and m/n, whose corresponding frequencies were 0.027, 0.013, 0.040, 0.027, 0.040, 0.067, 0.027 and 0.067, respectively. Digestion of the 284 bp PCR product of DRB3.2 gene with PstI in the crossbred cattle did not reveal any restriction site. These results suggested the absence of the recognition site in some of the animals. These results also revealed that the crossbred cows studied were in homozygous as well as heterozygous condition. On the basis of the above results it can be concluded that the DRB3.2 gene was found to be highly polymorphic in the crossbred cattle population.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.150-152
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• 2006

The DISCOVER Project (${\underline{D}}istributed$ ${\underline{I}}nformation$ ${\underline{S}}ervices$ for ${\underline{C}}limate$ and ${\underline{O}}cean$ products and ${\underline{V}}isualizations$ for ${\underline{E}}arth$ ${\underline{R}}esearch$) is a NASA funded Earth Science REASoN project that strives to provide highly accurate, carefully calibrated, long-term climate data records and near-real-time ocean products suitable for the most demanding Earth research applications via easy-to-use display and data access tools. A key element of DISCOVER is the merging of data from the multiple sensors on multiple platforms into geophysical data sets consistent in both time and space. The project is a follow-on to the SSM/I Pathfinder and Passive Microwave ESIP projects which pioneered the simultaneous retrieval of sea surface temperature, surface wind speed, columnar water vapor, cloud liquid water content, and rain rate from SSM/I and TMI observations. The ocean products available through DISCOVER are derived from multi-sensor observations combined into daily products and a consistent multi-decadal climate time series. The DISCOVER team has a strong track record in identifying and removing unexpected sources of systematic error in radiometric measurements, including misspecification of SSM/I pointing geometry, the slightly emissive TMI antenna, and problems with the hot calibration source on AMSR-E. This in-depth experience with inter-calibration is absolutely essential for achieving our objective of merging multi-sensor observations into consistent data sets. Extreme care in satellite inter-calibration and commonality of geophysical algorithms is applied to all sensors. This presentation will introduce the DISCOVER products currently available from the web site, http://www.discover-earth.org and provide examples of the scientific application of both the diurnally corrected optimally interpolated global sea surface temperature product and the 4x-daily global microwave water vapor product.

• Natural Product Sciences
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• 제12권2호
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• pp.67-73
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• 2006

Antiallergic activities of two variants of Artemisia princeps Pampanini SJ-1 (named as Sajabalssuk) and SS-1 (named as Sajuarissuk) cultivated in Ganghwado, which contain high content of eupatilin compared to those cultured by other places, were investigated to evaluate the possibility as inhibitors against allergic diseases. Ethanol and supercritical fluid extracts of SJ-1 and SS-1 inhibited the release of ${\beta}-hexosaminidase$ from RBL-2H3 cells, although their water extracts were inactive. These extracts potently inhibited lipopolysaccharide-induced NO production of RAW264.7. However, these extracts almost did not scavenge free radicals. Oral administration of these extracts to mice inhibited passive cutaneous anaphylaxis reaction induced by IgE, and acute dermatitis induced by 12-O-tetradecanoylphorbol-13-acetate. However, these extracts did not inhibit chronic dermatitis. Scratching behaviors, vascular permeability, and writhing syndromes were weakly inhibited by these extract at a dose of 50 mg/kg. Based on these findings, we believe that SJ-1 and SS-1 can improve IgE-induced allergic diseases such as rhinitis and asthma.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1998년도 제14회 학술발표회 논문개요집
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• pp.133-133
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• 1998

In the thin film alloy formation of the transition metals ion-beam-mixing technique forms a metastable structure which cannot be found in the arc-melted metal alloys. Sppecifically it is well known that the studies about the electronic structure of ion-beam-mixed alloys pprovide the useful information in understanding the metastable structures in the metal alloy. We studied the electronic change in the ion-beam-mixed ppt-Ct alloys by XppS and XANES. These analysis tools pprovide us information about the charge transfer in the valence band of intermetallic bonding. The multi-layered films were depposited on the SiO2 substrate by the sequential electron beam evapporation at a ppressure of less than 5$\times$10-7 Torr. These compprise of 4 ppairs of ppt and Cu layers where thicknesses of each layer were varied in order to change the alloy compposition. Ion-beam-mixing pprocess was carried out with 80 keV Ae+ ions with a dose of $1.5\times$ 1016 Ar+/cm2 at room tempperature. The core and valence level energy shift in these system were investigated by x-ray pphotoelectron sppectroscoppy(XppS) pphotoelectrons were excited by monochromatized Al K ａ(1486.6 eV) The ppass energy of the hemisppherical analyzer was 23.5 eV. Core-level binding energies were calibrated with the Fermi level edge. ppt L3-edge and Cu K-edge XANES sppectra were measured with the flourescence mode detector at the 3C1 beam line of the ppLS (ppohang light source). By using the change of White line(WL) area of the each metal sites and the core level shift we can obtain the information about the electrons pparticippating in the intermetallic bonding of the ion-beam-mixed alloys.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2012년도 제42회 동계 정기 학술대회 초록집
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• pp.154-154
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• 2012

Flexible complementary inverters based on thin-film transistors (TFTs) are important because they have low power consumption and high voltage gain compared to single type circuits. We have manufactured flexible complementary inverters using pentacene and amorphous indium gallium zinc oxide (IGZO) for the p-channel and n-channel, respectively. The circuits were fabricated on polyimide (PI) substrate. Firstly, a thin poly-4-vinyl phenol (PVP) layer was spin coated on PI substrate to make a smooth surface with rms surface roughness of 0.3 nm, which was required to grow high quality IGZO layers. Then, Ni gate electrode was deposited on the PVP layer by e-beam evaporator. 400-nm-thick PVP and 20-nm-thick ALD Al2O3 dielectric was deposited in sequence as a double gate dielectric layer for high flexibility and low leakage current. Then, IGZO and pentacene semiconductor layers were deposited by rf sputter and thermal evaporator, respectively, using shadow masks. Finally, Al and Au source/drain electrodes of 70 nm were respectively deposited on each semiconductor layer using shadow masks by thermal evaporator. The characteristics of TFTs and inverters were evaluated at different bending radii. The applied strain led to change in voltage transfer characteristics of complementary inverters as well as source-drain saturation current, field effect mobility and threshold voltage of TFTs. The switching threshold voltage of fabricated inverters was decreased with increasing bending radius, which is related to change in parameters of TFTs. Throughout the bending experiments, relationship between circuit performance and TFT characteristics under mechanical deformation could be elucidated.