• 분석과학
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• 제30권5호
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• pp.279-286
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• 2017

범죄현장에서 자주 발견되는 감열지의 표면에 남겨진 잠재지문의 압인순서 결정은 지문의 경시 변화 및 지문 나이의 연구와 밀접한 관계가 있으며, 수사에 있어서 추가적인 정보를 제공할 수 있다. 이를 위한 예비실험으로 2가지의 압인 압력과 시간(second)으로 감열지(일반 영수증과 팩스종이)상에 유류한 시료지문을 1~7일의 경과 후에 일(day)별로 iodine fuming법으로 현출하였다. 가시화된 지문의 이미지를 농도계 이미지 분석을 통하여 압인순서와 상관관계가 있을 수 있는 융선의 평균 면적값의 변화를 분석하였다. 감열지 용지의 종류에 따른 큰 차이는 나타나지 않았으나 3일차까지는 지문 융선의 면적값은 점점 증가하거나 유사한 경향을 보였고 4일에서 7일차까지 점진적으로 감소하였다. 6일과 7일차 지문의 면적값은 1일차의 대략 1/2 이하였다. 또한 겹 지문을 실험 한 경우 6일차, 7일차 경우에는 1~3일차의 지문과의 큰 선명도 차이를 보여 육안 구별가능성을 보였다. 추후 압인 조건에 대한 추가적인 실험은 현재의 방법이 지문의 감열지상 압인순서 결정에 가치 있는 방법임을 증명할 수 있을 것이다.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2003년도 춘계학술발표회 초록집
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• pp.53-53
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• 2003

Plasma polymerized organic thin films were deposited on Si(100) glass and metal substrates using thiophene and ethylcyclohexane precursors by PECVD method. In order to compare electrochemical properties of the as-grown thin films, the effects of the RF plasma power in the range of 30~100 W. AFM showed that the polymer films with smooth surface and sharp interface could be grown under various deposition conditions. Impedance analyzer was utilized for the determination of I-V curve for leakage current density and C-V for dielectric constants, respectively. To obtain C-V curve, we used a MIM structure of metal(Al)-insulator(plasma polymerized thin film)-metal(Pt) structure. Al as the electrode was evaporated on the thiophene films that grew on Pt coated silicon substrates, and the dielectric constants of the as-grown films were then calculated from C- V data measured at 1MHz. From the electrical property measurements such as I-V and C-V characteristics, the minimum dielectric constant and the best leakage current of thiophene thin films were obtained to be about 3.22 and $1{\;}{\times}10^{-11}{\;}A/cm^2$. However, in case of ethylcyclohexane thin films, the minimum dielectric constant and the best leakage current were obtained to be about 3.11 and $5{\;}{\times}10^{-12}{\;}A/cm^2$.

• 한국진공학회지
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• 제12권1호
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• pp.16-19
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• 2003

실온에서 p-InP (100) 위에 이온빔 증착법으로 Ni 박막을 성장하였다. Ni 박막의 이차전자방출계수(${\gamma}$)와 일함수를 결정하기 위하여 Ne, Ar, $N_2$, Xe 이온원을 사용하여 가속전압에 따른 $\gamma$를 측정하였다. 여러 가지 기체와 집속이온빔장치의 가속전압에 따른 $\gamma$결과로부터 Ni 박막의 일함 수를 결정하였다. p-InP (100) 위에 성장한 Ni 박막의 일함수는 5.8 eV ~ 5.85 eV 이었다. 실험을 통하여 얻어진 결과들은 실온에서 p-InP (100) 위에 성장한 Ni 박막의 전자적 성질에 관한 중요한 정보를 제공하고 있다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1999년도 제17회 학술발표회 논문개요집
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• pp.140-140
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• 1999

Ti/Ni multilayered films (MLF) are ideal for neutron optics particularly in neutron guides and focusing devices. This system also possesses the tendency of amorphization through a solid-state reaction (SSR). This behaviors are closely related to the electronic structures and both magneto-optical (MO) and optical properties of metals depend strongly on their electron energy structures. Mutual inter-diffusion of the Tin and Ni atoms in the MLF caused by a low temperature annealing should decrease the thickness of pure Ni, as well as change the chemical and atomic order in the reactive zone. The application of the MO spectroscopy to the study of SSR in the MLF allows us to obtain an additional information on the changes in the atomic and chemical orders in the interface region. The optical one has no restriction on the magnetic state of the constituent sublayers. Therefore, the changes in magnetic, MO and optical properties of the Ti/Ni MLF due to SSR can be expected. To the best of our knowledge, the MO and optical spectroscopies were not used for this purpose. SSR has been studied in the series of the Ti/Ni MLFs with bilayer periods of 0.65-22.2nm and constant ratio of the Ti to Ni sublayers thickness by using MO and optical spectroscopies as well as an x-ray diffraction. The experimental MO and optical spectra are compared with the computer-simulated spectra, assuming various interface models. The relative changes in the x-ray diffraction spectra and MO properties of the Ti/Ni MLF caused by annealing are bigger for the multilayers with "thick" sublayers, or the SSR with the formation of amorphous alloy takes place mainly in the Ti/Ni multilayers with "thick" sublayers, while in the nominal threshold thickness of the Ni-sublayer for the observation of the equatorial Kerr effect in the as-deposited and annealed Ti/Ni MLFs of about 3.0 and 4.5nm thick is explained by the formation of amorphous alloy during the deposition or the formation of the nonmagnetic alloyed regions between pure components as a result of the SSR. For the case of Ti/Ni MLF the MO approach is more sensitive for the determination of the thickness of the reacted zone, while x-ray diffraction is more useful for structural analyses.structural analyses.

• Mycobiology
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• 제36권3호
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• pp.143-147
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• 2008

We have detected the slime mold, Diachea leucopodia (GNU06-10) in a strawberry greenhouse located in Sancheong-gun, Gyeongnam. Typical fruiting bodies had developed gregariously on the strawberry leaves, petioles, and plant debris on ground soil habitat, and also surprisingly on plastic pipes and a vinyl covering. Field samples were examined via stereomicroscopy, light microscopy, and SEM for the determination of morphological characteristics. Dark-brown to black spores formed gregariously within the stipitate cylindrical sporangium, and were covered by an iridescent peridium, which may be intact at maturity, or may have disintegrated. The upper portion of the peridium generally breaks up to expose the spores, whereas the lower portion was usually persistent. The results of energy dispersive X-ray spectrometer (EDS) analysis showed that lime was present in the stalk and columella but absent from the spores, capillitium, and peridium. The above characteristics confirm its taxonomic position in the genus Diachea. However, this genus is intermediate in character between the Physarales and Stemonitales of the Myxogastromycetidae. Hence, this genus had been classified as a member of the Stemonitales until the mid-1970's, on the basis of its iridescent peridium and noncalcareous capillitial system, similar to Comatricha of the Stemonitaceae. By way of contrast, emphasis on morphological characteristics, most notably the calcareous stalk and typical columella, places Diachea within the order Physarales. The presence of a phaneroplasmodium during the trophic stage and lime deposition in its sporophores, as was confirmed in this work, supported the inclusion of Diachea in the Physarales, and the noncalcareous capillitial system verified its identification as a member of the Didymiaceae. Further characteristics of the species D. leucopodia include the following: phaneroplasmodium, spore globose 7.5 ${\mu}m$ in diameter, very minutely roughened; sporangia $500{\mu}m\times1mm$, more or less cylindrical, gregarious, stalked 1.2mm; stalk and columella white.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2003년도 추계학술발표회초록집
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• pp.119-119
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• 2003

Plasma polymerized organic thin films were deposited on Si(100) glass and Copper substrates at 25 ∼ 100 $^{\circ}C$ using cyclohexane and ethylcyclohexane precursors by PECVD method. In order to compare physical and electrochemical properties of the as-grown thin films, the effects of the RF plasma power in the range of 20∼50 W and deposition temperature on both corrosion protection efficiency and physical properties were studied. We found that the corrosion protection efficiency (P$\_$k/), which is one of the important factors for corrosion protection in the interlayer dielectrics of microelectronic devices application, was increased with increasing RF power. The highest P$\_$k/ value of plasma polymerized ethylcyclohexane film (92.1% at 50 W) was higher than that of the plasma polymerized cyclohexane film (85.26% at 50 W), indicating inhibition of oxygen reduction. Impedance analyzer was utilized for the determination of I-V curve for leakage current density and C-V for dielectric constants. To obtain C-V curve, we used a MIM structure of metal(Al)-insulator(plasma polymerized thin film)-metal(Pt) structure. Al as the electrode was evaporated on the ethylcyclohexane films that grew on Pt coated silicon substrates, and the dielectric constants of the as-grown films were then calculated from C-V data measured at 1㎒. From the electrical property measurements such as I-V ana C-V characteristics, the minimum dielectric constant and the best leakage current of ethylcyclohexane thin films were obtained to be about 3.11 and 5 ${\times}$ 10$\^$-12/ A/$\textrm{cm}^2$ and cyclohexane thin films were obtained to be about 2.3 and 8 ${\times}$ 10$\^$-12/ A/$\textrm{cm}^2$.

• Journal of Animal Science and Technology
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• 제48권6호
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• pp.897-906
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• 2006

본 연구는 셀레늄강화 한우고기 생산을 위하여 셀레늄강화 버섯폐배지(Se-SMC)가 함유된 셀레늄사료(사료내 셀레늄함량: 0.9ppm)를 활용하여 급여사양기간(2개월, 3개월, 4개월)을 달리 하였을 때, 비육후기 거세한우의 조직 내 셀레늄 함량과 혈중 글루타치온 과산화효소(GSH-Px) 활성에 미치는 영향을 조사하여 최대 포화축적기간을 제시하고자 실시하였다. 본 연구에 사용된 비육후기 거세한우는 30두로 각 급여기간(2개월: 평균 체중 677kg, 3개월: 평균 체중 610kg 및 4개월: 평균 체중 524kg)에 대한 대조구 및 Se-SMC 급여구로 나누어 처리구당 5두씩 배치하여 총 6처리구로 구분하여 실시하였다. 대조구와 Se-SMC 급여구에 사용된 실험사료는 0.1과 0.9ppm의 셀레늄을 각각 함유하였다. 각 급여기간이 종료되면 도축하여 후지와 간을 채취하였으며 이를 셀레늄 함량분석에 이용하였다. 그리고 혈중 셀레늄 농도 및 글루타치온 과산화효소활성을 분석하기 위하여 도축 시에 채혈을 실시하였다. 건물섭취량은 Se-SMC 급여 및 급여기간에 의하여 유의한 차이가 나타나지 않았다. 또한 일당증체량은 대조구 및 Se-SMC 급여구간 그리고 급여기간 간에 유의한 차이가 나타나지 않았을 뿐만 아니라 총증체량 또한 각 급여기간내 대조구와 Se-SMC 급여구 간에 유의한 차이가 나타나지 않았다. Se-SMC 급여는 혈중 셀레늄농도를 유의하게 증가시켰으나(P<0.001), 급여기간에 따른 혈중셀레늄 농도에는 유의한 영향을 미치지 않았다. 아울러 혈중 GSH-Px 활성은 혈중 셀레늄농도에서 나타난 양상과 유사한 경향을 나타내었고, 급여기간에 의한 효과는 나타나지 않았다. 후지내 셀레늄 함량은 급여기간(P<0.05)이 증가함에 따라, 그리고 Se-SMC 급여(P<0.001)에 의하여 유의하게 증가하였다. 하지만, Se-SMC의 3개월 급여군과 4개월 급여군 간에는 유의한 차이가 나타나지 않았다. 간내 셀레늄 함량은 Se-SMC의 급여기간이 증가함에 따라 다소 증가하는 경향을 나타내었으나 유의한 효과는 나타나지 않았다. 하지만, 동일한 급여기간 내 Se-SMC는 대조구에 비하여 유의하게 높았다(P<0.01).이상의 결과로부터 근육내 셀레늄 축적을 위한 적정 Se-SMC 급여기간은 후지와 간내 셀레늄 함량을 고려할 때 약 2 내지 3개월의 급여가 충분할 것으로 사료된다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권5호
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• pp.720-732
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• 2001

Skeletal muscle is of major economic importance since it is finally converted to meat for consumers. The increase in meat production with low costs of production may be achieved by optimizing muscle growth, whereas a high meat quality requires, among other factors, the optimization of intramuscular glycogen and fat stores. Thus, research in energy metabolism aims at controling muscle metabolism, but also liver and adipose tissue metabolism in order to optimize energy partitioning in favour of muscles. Liver is characterized by high anabolic and catabolic rates. Metabolic enzymes are regulated by nutrients through short-term regulation of their activities and long-term regulation of expression of their genes. Consequences of liver metabolic regulation on energy supply to muscles may affect protein deposition (and hence growth) as well as intramuscular energy stores. Adipose tissues are important body reserves of triglycerides, which result from the balance between lipogenesis and lipolysis. Both processes depend on the feeding level and on the nature of nutrients, which indirectly affect energy delivery to muscles. In muscles, the regulation of rate-limiting nutrient transporters, of metabolic enzyme activities and of ATP production, as well as the interactions between nutrients affect free energy availability for muscle growth and modify muscle metabolic characteristics which determine meat quality. The growth of tissues and organs, the number and the characteristics of muscle fibers depend, for a great part, on early events during the fetal life. They include variations in quantitative and qualitative nutrient supply to the fetus, and hence in maternal nutrition. During the postnatal life, muscle growth and characteristics are affected by the age and the genetic type of the animals, the feeding level and the diet composition. The latter determines the nature of available nutrients and the rate of nutrient delivery to tissues, thereby regulating metabolism. Physical activity at pasture also favours the orientation of muscle metabolism, towards the oxidative type. Consequently, breeding systems may be of a great importance during the postnatal life. Research is now directed towards the determination of individual tissue and organ energy requirements, a better knowledge of nutrient partitioning between and within organs and tissues. The discovery of new molecules (e. g. leptin), of new molecular mechanisms and of more powerful techniques (DNA chips) will help to achieve these objectives. The integration of the different levels of knowledge will finally allow scientists to formulate new types of diets adapted to sustain a production of high quality meat with lower costs of production.