• Asian-Australasian Journal of Animal Sciences
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• 제20권2호
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• pp.229-236
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• 2007

This study was conducted to determine effects of different selenium (Se) sources on performance, carcass characteristics, blood measures (whole blood Se concentration and plasma glutathione peroxidase (GSH-Px) activity), and Se concentrations in tissues of finishing Hanwoo steers (Korean native steers). Twenty finishing Hanwoo steers (average body weight=536${\pm}$23.4 kg, average age=approximately 20 months) were allotted to treatments in four groups of five steers per pen for 16 weeks preceding slaughter. Treatments were control (CON), spent mushroom composts from Se-enriched mushrooms (Se-SMC), selenized yeast (Se-Y), and sodium selenite (SS). Dietary Se levels of all treatments except CON were 0.9 mg Se/kg on the dry matter basis. Body weight was measured at the first and final day of trial, and blood samples were collected to analyze whole blood Se concentration and plasma GSH-Px activity at 2, 4, 8, and 16 weeks. At the end of trial, steers were slaughtered to collect muscle and liver samples for their Se analyses, and carcass data were recorded. In terms of dry matter intake, body weight gain and carcass characteristics, no significant differences among treatments were observed. Whole blood Se concentrations were significantly higher (p<0.05) for Se-SMC and Se-Y treatments than for CON at each collection period, with no significant difference between SS and CON. For weeks 2 and 8, there was no significant difference for whole blood Se concentration between Se-SMC and Se-Y, but for weeks 4 and 16, Se-Y treatments were significantly higher (p<0.05) than Se-SMC. No differences were observed for plasma GSH-Px activity between Se-SMC and Se-Y. The Se concentrations in hind leg and liver were significantly different among treatments (p<0.05) and those in both tissues ranked the greatest in Se-Y, followed by Se-SMC, SS, and CON treatments. However, tissue Se concentration for SS was not different from that for CON. These results showed that feeding organic Se sources such as Se-SMC and Se-Y enhanced Se concentration in tissues, while SS, the most common supplement of inorganic Se, was inefficient in Se deposition. Even though Se-Y had a higher Se concentration in tissues than Se-SMC, replacing Se-Y with Se-SMC in diets of beef steers would be an inexpensive way to increase Se concentration in beef.

• 한국약용작물학회지
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• 제11권5호
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• pp.340-346
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• 2003

묘삼 재배시 원야토와 약토의 적정 혼합비율을 설정하고 해가림 시설 설치시 기존관행 방법의 문제점을 개선하고 작업효율을 높이기 위하여 시험을 수행 한 결과는 다음과 같다. (1) 상토조제시 약토의 적정 구성비율 설정시험에서 약토함량이 증가할수록 고상은 감소하고, 공극율과 기상, 토양중 OM과 $P_2O_5$ 함량이 증가하는 경향이었다. (2) 약토함량별 지상부 생육은 약토함량 증가에 따라 엽면적, 엽록소는 증가하였으며, 지하부 생육중 근경과 근중이 증가하였다. (3) 약토조성별 규격묘 생산량은 백마사 약토비율이 10:1처리에서 사용가능 묘삼은 750개/칸 수준으로 양호하였다. 2. 해가림 (일복) 전주목 적정높이를 설정하기 위한 시험에서 (4) 전주높이별 광량은 전주높이가 높을수록 광량이 많았으며 평균지온은 전주높이가 150 cm에서 낮아 광량과 지온은 비례하였다. (5) 해가림 시설 전주목 높이가 낮을수록 엽록소 함량과 근중이 증가하는 경향이었고, 사용가능 묘삼수는 처리간 유의성은 없었으며, 또한 관행보다는 그 수가 적었지만 전주높이 150 cm에서 740개/칸로 높았다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2009년도 제38회 동계학술대회 초록집
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• pp.97-97
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• 2010

We demonstrate the hybrid polymer-quantum dot based multi-functional device (Organic bistable devices, Light-emitting diode, and Photovoltaic cell) with a single active-layer structure consisting of CdSe/ZnS semiconductor quantum-dots (QDs) dispersed in a poly N-vinylcarbazole (PVK) and 1,3,5-tirs- (N-phenylbenzimidazol-2-yl) benzene (TPBi) fabricated on indium-tin-oxide (ITO)/glass substrate by using a simple spin coating technique. The multi-functionality of the device as Organic bistable device (OBD), Light Emitting Diode (LED), and Photovoltaic cell can be successfully achieved by adding an electron transport layer (ETL) TPBi to OBD for attaining the functions of LED and Photovoltaic cell in which the lowest unoccupied molecular orbital (LUMO) level of TPBi is positioned at the energy level between the conduction band of CdSe/ZnS and LiF/Al electrode (band-gap engineering). Through transmission electron microscopy (TEM) study, the active layer of the device has a p-i-n structure of a consolidated core-shell structure in which semiconductor QDs are uniformly and isotropically adsorbed on the surface of a p-type polymer core and the n-type small molecular organic materials surround the semiconductor QDs.

• 대한한방부인과학회지
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• 제18권4호
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• pp.242-252
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• 2005

Purpose : Dysfunctional uterine bleeding is an abnormal uterine bleeding without an organic disease. A hormone therapy or anti-depressant medicine is chosen to treat dysfunctional uterine bleeding. However sometimes it didn't work. Hysterectomy is recommended to stop bleeding but a lot of women are afraid of it. The purpose of this study is to show the possibility of oriental medical treatment for dysfunctional uterine bleeding in this case report. Methods : The 30-year-old female patient who had suffering from uterine bleeding was treated with hormone therapy and anti-depressant medicine. However she was bleeding again. She had no organic disease in some medical examination, finally she was recommended a hysterectomy. But she didn't want the operation. In addition, she started acute abdominal pain. She wanted a oriental medical treatment and we treated her from the May 14th 2005 to the June 4th 2005 in admission. We used Yikweseungyangtang(益胃升陽湯), Ojuksan(五積散), Kwibitang hap Gyoesamultang(歸婢湯合膠艾四物湯) for herb-medication. In acupuncture therapy,　ST36(Chok-Samni 足三里) SP1(Eunbek, 隱白) SP6(Samumgyo, 三陰交) SP10(Hyulhae, 血海) Liv1(Daedon, 大敦) Liv3(Taechung, 太衝) LI4(Hapgok, 合谷) was selected. In moxa therapy CV4(Kwanwon, 關元), CV6(Kihae, 氣海), CVl2(Chung-wan, 中脘) was used.　Results : After oriental medical treatment for 22 days, she stopped uterine bleeding　and recovered her health．　Conclusion ：　Oriental medical treatment is expected to have an effect on　dysfuctional uterine bleeding with abdominal pain.

• 한국유기농업학회지
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• 제26권1호
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• pp.19-31
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• 2018

In general, an increase in consumer income increases interest in safe foods and increases consumption of environmental friendly foods. Meanwhile, even in Malawi, interest in safe food and environmentally friendly food has been increasing due to increase in per capita income, but research related to this has not been done yet. The purpose of this study is to estimate the value of environmentally friendly foods in Malawi consumers. For this purpose, we surveyed the consumption patterns and estimated the value of organic chicken for consumers visiting supermarkets. As a value estimation technique, Contingent Valuation Method (CVM) was used. Probit model analysis showed that price, expenditure on regular chicken, and knowledge of organic food affect the willingness to pay for organic chicken. CVM analysis shows that Malawi supermarket consumers are willing to pay MK2,514 (3.59) dollars per kilo of organic chicken, which is 25.7% higher than the average price of a regular chicken. Thus, Malawi supermarket consumers can deduce that they have a higher value for environmentally friendly food than regular food. These findings can be used in formulating policies on food safety by government officials, organic chicken meat marketing strategies by supermarket mangers, decision making to enhance organic food production by producers, in order to develop organic food industry.

• 한국가금학회지
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• 제33권4호
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• pp.255-262
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• 2006

유기태 셀레늄의 수준별 첨가가 육계 및 산란계의 생산성에 미치는 영향을 구명하고, 닭고기와 계란 내의 셀레늄 축적에 미치는 효과를 알아보기 위하여 2차례의 시험을 수행하였다. 시험 1은 selenium yeast로 셀레늄을 0.60, 1.20, 1.80 및 2.40 ppm을 첨가하였을 때 육계의 사료 섭취량, 증체량, 사료 요구율 및 가슴근육과 간 내의 셀레늄 축적에 미치는 영향을 조사하였다. 증체량, 사료 섭취 량 및 사료 요구율은 대조구를 포함한 모든 처리구에서 차이가 없었으며, 가슴살의 셀레늄 함량은 대조구에 비하여 유기태 셀레늄의 첨가 수준을 증가시킬수록 높았다(P<0.05). 간조직의 셀레늄 함량은 대조구에 비하여 유기태 셀레늄을 첨가한 모든 처리구에서 높았으며(P<0.05),특히 유기태 셀레늄을 1.20 ppm이상 첨가할 경우에는 효과가 크게 나타났다(P<0.05). 시험 2에서는 유기태 셀레늄의 첨가 수준이 산란계의 생산성 및 계란 내 셀레늄의 축적에 미치는 영향을 구명하기 위하여 selenium yeast로 셀레늄을 0.30, 0.60, 0.90 및 1.20 ppm을 첨가하였을 때 산란율, 난중, 사료 섭취 량, 사료 요구율, 난질 및 계란 내 셀레눔 함량을 조사하였다. 산란율은 유기태 셀레늄 0.30 ppm과 0.90 ppm 첨가구에서 높았으나(P<0.05), 1일 산란량, 사료 섭취량 및 사료 요구율은 대조구를 포함한 모든 처리구에서 차이가 없었다. Haugh unit는 대조구를 포함한 모든 처리구에서 차이가 없었으나, 난각 두께는 유기태 셀레늄 0.60 및 1.20 ppm첨가구가 각각 385 및 $386{\mu}m$으로 유기태 셀레늄 0.90 ppm 첨가구의 $368{\mu}m$에 비하여 유의적으로 두꺼웠다(P<0.05). 계란 내 셀레늄 함량은 유기태 셀레늄 첨가 수준을 높일수록 더욱더 증가하였다(P<0.05).

• Asian Pacific Journal of Cancer Prevention
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• 제15권8호
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• pp.3681-3686
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• 2014

In this study, we demonstrated selenium (Se) accumulation in Bifidobacterium longum strain (B. longum) and evaluated the effect of Se-enriched B. longum (Se-B. longum) on tumor growth and immune function in tumor-bearing mice. Analysis using high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS) revealed that more than 99% of Se in Se-B. longum was organic, the main component of which was selenomethionine (SeMet). In the in vivo experiments, tumor-bearing mice (n=8) were orally administrated with different doses of Se-B. longum alone or combined with cyclophosphamide (CTX). The results showed that the middle and high dose of Se-B. longum significantly inhibited tumor growth. When Se-B. longum and CTX were combined, the antitumor effect was significantly enhanced and the survival time of tumor-bearing mice (n=12) was prolonged. Furthermore, compared with CTX alone, the combination of Se-B. longum and CTX stimulated the activity of natural killer (NK) cells and T lymphocytes, increasing the levels of interleukin-2 (IL-2) and tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), and the leukocyte count of H22 tumor-bearing mice (n=12).

• 한국분말재료학회지
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• 제27권3호
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• pp.233-240
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• 2020

Nano-sized ZnSe particles are successfully synthesized in an aqueous solution at room temperature using sodium borohydride (NaBH₄) and thioglycolic acid (TGA) as the reducing agent and stabilizer, respectively. The effects of the mass ratio of the reducing agent to Se, stabilizer concentration, and stirring time on the synthesis of the ZnSe nanoparticles are evaluated. The light absorption/emission properties of the synthesized nanoparticles are characterized using ultraviolet-visible (UV-vis) spectroscopy, photoluminescence (PL) spectroscopy, and particle size analyzer (PSA) techniques. At least one mass ratio (NaBH4/Se) of the reducing agent should be added to produce ZnSe nanoparticles finer than 10 nm and to absorb UV-vis light shorter than the ZnSe bulk absorption wavelength of 460 nm. As the ratio of the reducing agent increases, the absorption wavelengths in the UV-vis curves are blue-shifted. Stirring in the atmosphere acts as a deterrent to the reduction reaction and formation of nanoparticles, but if not stirred in the atmosphere, the result is on par with synthesis in a nitrogen atmosphere. The stabilizer, TGA, has an impact on the Zn precursor synthesis. The fabricated nanoparticles exhibit excellent photo-absorption/discharge characteristics, suggesting that ZnSe nanoparticles can be alloyed without the need for organic solutions or high-temperature environments.

• 한국환경보건학회지
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• 제33권2호
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• pp.98-103
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• 2007

This study was performed to measure the changed concentrations of formaldehyde and volatile organic compounds after moving in the newly constructed apartment buildings at Seoul. From December 2004 to October 2005, we measured the concentration of formaldehyde and volatile organic compounds in newly constructed apartment buildings before and after residence. In conclusion, it showed that there was a significant relationship association between the con centration of the volatile organic compound and the formaldehyde and remodeling of the house, built in-furniture, and ventilation of the house. Therefore, it was suggested that we need preventive measures and management plans about various factors such. as remodeling, and built in-furniture, ventilation to decrease the concentrations of volatile organic compounds and formaldehyde.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
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• pp.45-45
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• 2008

$SrTiO_3$/Organic composites 는 Inorganic/organic 복합재료로, 유전 특성이 우수하고, 저온하여 제조단가의 감소가 가능하다. 이를 바탕으로 $SrTiO_3$/Organic composites 복합재를 이용한 가능성을 확인하기 위해 Multilayer 구조의 Coupler를 설계, 제작 후 특성을 분석하였다. Coupler 는 RF signal을 분기하기 위한 목적으로 평행한 한 쌍의 Conductor line 구조를 가진다. 2개의 Line 의 길이를 특정주파수 $f_0$의 wavelength $\lambda$/4 로 설계하여 서로 근접 시켰을 때 $f_0$를 중심으로 RF 신호 분기 현상이 나타난다. 보다 넓은 대역에 걸쳐서 신호분기를 하기 위해서는 두 line 간의 간격을 좁혀 Signal coupling 효과를 증가 시킨다. single layer conductor 구조에서는 물리적인 한계가 있으므로, multilayer 구조를 사용하면 보다 넓은 대역의 Coupled line coupler 로서 기능하게 된다.