This study focuses on the application of a new measurement method that quantifies the residual color of filtered water using a spectrocolorimeter after filtering the discolored substances. It was confirmed through the color and turbidity cross-test that the discolored substances cannot be measured effectively with the current legal color and turbidity test method. Therefore, the National Institute of Environmental Research's filter testing method, which involves filtering the sample through 0.45 μm filter and visually inspecting the color, was improved. A membrane filter colorimetry (MFC) method was established by measuring the color difference (ΔE*ab(65)) of the filtered filter using a spectrophotometer and expressing it as filter color unit (FCU). Using the MFC method, the FCU for reference materials such as iron and manganese, as well as field samples, was measured. The results showed a high correlation with turbidity, and the color difference patterns varied depending on the type of reference materials and field samples. This indicates that the MFC method is an effective new measurement method of discolored tap water.

정보통신의 발달로 날로 소형화되고 있는 정보기기들의 디스플레이는 평판화를 통해 부피가 작고 가벼우며, 현장감과 몰입감의 증진을 위해 고감도의 그래픽을 제공하고 있다. 하지만 실험기기에 대해서는 아직 인터페이스나 디스플레이 GUI 디자인에 대한 관심이 약하고, 전체적인 제품의 외관 디자인에 관심을 보이고 있는 정도다. 이에 본 연구에서는 실험기기와 이의 주사용자인 과학자들의 특성을 고려하여 실험기기 컨트롤러 디스플레이 GUI 디자인에 대한 선호도를 분석해 보았다. 그래픽 기반의 디스플레이 GUI와 텍스트 기반의 디스플레이 GUI에 대하여 동일한 태스크를 수행한 후 태스크 수행시간 및 오류 횟수 등을 비교 분석해 봄으로써 과학자들이 어떤 디스플레이 GUI 디자인을 더 선호하는지 알아보았다. 실험 결과 과학자들은 텍스트 기반의 디스플레이 GUI에서 더 높은 수행도를 보여주고 있음을 알 수 있었다. 하지만 선호도 비교에서는 그래픽 기반의 디스플레이 GUI 디자인을 약간 더 선호하는 것으로 나타났다.

Transient luminous events (TLEs; sprites, elves, jets and etc.) are lightning-related optical flashes occurring above thunderstorms. Since the first discovery of sprites in 1989, scientists have learned a great deal about the morphological, spectroscopic and electromagnetic characteristics of TLEs through ground and spacecraft campaigns. However, most of the TLE studies were based on events recorded over US High Plains. To elucidate the possible biasing effects, space-borne observations are needed and have their merits. Imager of sprites and Upper Atmospheric Lightning (ISUAL) on the FORMOSAT-2 satellite is the first instrument to carry out a true global measurement of TLEs from a low- earth orbit. In this short paper, we apply a common astronomical data analysis technique, two-color diagram, on the ISUAL spectrophotometer (SP) data. By choosing appropriated bandpasses and converting the measured flux of TLEs into the unit of magnitude, two-color diagrams of TLEs can be constructed. We demonstrate that two-color diagrams, which were constructed from the narrow-band spectrophotometer data, can be used to classify different types of TLEs and trace their temporal evolution. The amount of reddening due to Earth's atmosphere can also be estimated from two-color diagrams assembled from the broad-band spectrophotometer data.

소고기의 Chuck부위에 존재하는 색소중 Oxy-와 Metmyoglobin의 농도를 알기 위하여 Hunter-Lab와 분광광도계를 사용하였다. Hunter-Lab에 의한 Oxymyoglobin의 농도는 L, a 그리고 b에서 각각 34.03, 10.40, 그리고 6.50으로 측정되었으며 이들 수치는 CIE Primaries로서는 각각 X, Y 그리고 Z에서 13.33, 11.58 그리고 9.94로 환산되었다. 또 Hunter-Lab에 의한 Metmoyglobin은 L, a 그리고 b에서 39.10, 13.20 그리고 10.13의 수치를 보여줬으며, CIE primaries에서는 17.88, 15.29와 11.40이 X, Y와 Z로 각각 환산되었다. Oxymyoglobin의 Spectrum은 Extinction Coefficient()에서 0.79와 0.83의 수치를 가진 2개의 Peak가 파장 530과 570nm에서 각각 나타났으며 Metmyoglobin의 경우는 Extinction Ceofficient에서 0.58 그리고 파장이 500인 peak을 보이면서 불규칙한 곡선을 보여 주었다.

Sesamin and sesamolin, antioxidant lipidsoluble lignan compounds, are abundant in sesame (Sesamum indicum L.) seed oil and provide oxidative stability of oil related to sesame quality. The sesamin and sesamolin contents of 403 sesame land races of Korea were determined by HPLC analysis of methanol extract (HPLC value), and their total lignan content was compared with those by using UV-Vis spectrophotometric analysis (UV method) of methanol (UV-MeOH value) and hexane (UV-Hexane value) extracts. HPLC values of total lignan content were strongly associated with UV-Hexane (r=0.705**) and UV-MeOH (r=0.811**) values. The UV values from both the extracts were 3.8-4.7 times higher than those of HPLC values. Lignan content was overestimated by UV method because total compounds in the mixture solution were quantified by absorbing at the same ultraviolet wavelength as in HPLC method. UV method could more rapidly analyze small amount of sample with higher sensitivity of detection than HPLC method. Average contents of lignans in sesame germplasm evaluated in this study were 2.09~pm1.02mg/g of sesamin, and 1.65~pm0.61mg/g of sesamolin, respectively, showing significant variation for lignan components. The results showed that UV method for the determination of sesamin and sesamolin could be practically used as a faster and easier method than HPLC by using the regression equations developed in this study

Cyanidin 3-glucoside (C3G) content contained in the grains of blackish purple rice varieties, Heugjinjubyeo, Kilimheugmi, Heugnambyeo, Sanghaehy-anghyeolla, and the progenies derived from their crosses was evaluated by HPLC and UV-Vis spectroscopy. C3G content was higher in the range of 10-30% by using UV-Vis method compared to HPLC method. A significant linear relationship was, however, observed between two analytical methods. The correlation coefficient was 0.98. Thus, this results suggested that it would be able to use UV-Vis spectroscopy to determine C3G content which does not demanded precise value like selection.