• Journal of Science Education
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• v.45 no.3
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• pp.326-335
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• 2021

In this study, we developed an experimental apparatus to study the principle of rainbow formation. The rainbow is formed through the dispersion, reflection, and refraction of light on water droplets. However, the rainbow cannot be made from a single drop of water. Thus, we devised an apparatus to observe the principle behind the rainbow formation caused by light rays on many water drops. This we deemed would help students understand the formation of the rainbow. We used glass beads as water drops to reproduce the rainbow phenomena. We also materialized the rainbow by changing various variables such as the position of the observer and the height of the light source, etc.

• The Science & Technology
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• v.32 no.10 s.365
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• pp.21-21
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• 1999

하늘나라를 이어주는 아름다운 다리라던 무지개의 신비도 알고보면 물방울에서 굴절 반사하는 태양빛의 파장에 따라서 붉은색부터 보라색으로 갈라지는 원리에서 비롯된 것이다. 또 우리는 가끔 쌍무지개를 보게 되는데 자세히 보면 좀더 희미한 둘째 무지개의 색깔은 첫째 무지개와는 반대로 되어 있다는 사실도 알게 된다.

• RED RIBBON
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• s.47
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• pp.42-43
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• 2002

무지개 2002는 2000년과 2001년에 이어 세번째로 열리는 한국의 게이/레즈비언/트렌스젠더/양성애자 축제이다. 여전히 성적 소수자에게 세상은 편견의 눈길을 보내지만 이제 그들을 위한 축제를 열 수 있을 만큼은 목소리가 조금 높아졌고 '그들의'축제가 아니라 '우리의'축제가 될 그날을 기다린다.

• Journal of Gifted/Talented Education
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• v.21 no.1
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• pp.39-56
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• 2011

The purpose of this study was to analyze the characteristics of science gifted students who participated in science gifted activity using rainbow. For this purpose, the science gifted activity using rainbow was developed and applied to 23 seventh grade science gifted students. The results indicated that gifted students had various concepts and ideas of optics. For example, some gifted students thought that there was rainbowshaped light at the place of rainbow, and another considered the process of dispersion of light in a waterdrop would be same as the process of the dispersion in the prism. Also, various rainbow theories and scientific imagination of gifted students were found. For devising new rainbow, gifted students used two strategies, 'changing the features' and 'changing conditions'. In addition, we discussed effective methods of applying this activity and implications to science gifted education.

• Journal of Aquaculture
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• v.10 no.1
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• pp.49-54
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• 1997

Characteristics of sex ratio and morphometric traits of induced allotriploid between female rainbow trout, Oncorhynchus mykiss and male cherry salmon, O. masou were performed. Sex ratios in both rainbow trout and cherry salmon were equally 1:1, while hybrid and allotriploid revealed higher proportion of male offspring (p<0.01). Body trait measurements of allotriploid in head hight/head length, length of dorsal fin base/body length and length of pectoral fin/body length were intermediate to their parental species, while in length of upper jaw/head length, allotriploid much more resembled that of rainbow trout. These facts proved that allotriploidization improved characters in sex ratio and morphometric traits compared to those o their parental species.

• 사료
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• s.16
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• pp.34-37
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• 2005

1979년 대한민국 사료산업에 진출한 이후 고품질 사료와 차별화 된 고객관리로 '무지개 성공 신화'를 이룩하며, 명실공히 국내 사료산업의 선두주자로 한국 축산업을 이끌어 가고 있는 '무지개의 성공 신화' 대한제당(주)을 만나본다.

• KAPE Magazine
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• s.249
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• pp.7-9
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• 2017

세종특별자치시의 축산물품질공정관리 지정업체 중 세종시 학교급식의 선두주자인 무지개영농조합법인 이상규 대표를 만나 축평원에서 운영하고 있는 축산물품질공정관리에 대해 들어보았다.

• Korean Journal of Ichthyology
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• v.5 no.1
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• pp.96-112
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• 1993

The morphological characteristics of chum salmon Oncorhynchus keta, masou salmon. Oncorhynchus masou and rainbow trout, Oncorhynchus mykiss in Korea were studied from 1989 to 1990. It was found that 13 factors of the female and 11 factors of the male in body form, number of pyloric ceaca and gill rakers has significant specific differences. There were some differences among species in the ratios of body depth, caudal peduncle depth, dorsal fin length and anal fin length to standard length (PBL), and snout length, eye diameter, upper jaw length, and cheek to head length. In the ratio of head length to fork length of the male, chum salmon showed the highest(24.7%) value and rainbow trout the lowest(21.6%). No difference was found in the female. It was proved that number of vertebrae, gill rakers, pyloric ceaca and lateral line scales were useful taxonomical characteristics of the salmon species. In particular, the ratio of eye diameter (ED) to head length (HL) appeared to be a new taxonomic criterion for the salmons in Korean waters.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.29 no.2
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• pp.208-229
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• 1996

Comprative osteology of the chum salmon Oncorhynchus keta, masu salmon O. masou and rainbow trout O. mykiss in Korea was studied. As a result, it was found that there were some differences in the structural features of the cranium and visceral skeleton among the species. Interspecific differencies in glossohyal, supraethmoid, parasphenoid and vomer were distinctive for the species. Chum salmon could be distinguished easily by some characters on form of glossohyal which is thin, long and sharp in shape. It has triangle shape supraethmoid while other two species have oval shape one. The shape of parasphenoid, preopercle, hyomandibular and the number of epurals were evaluated as new taxonomic criteria for the salmons.

• Korean Journal of Ichthyology
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• v.11 no.2
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• pp.126-133
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• 1999

Ultrastructure of the zona radiata and the micropyle of ripe eggs in the rainbow trout (Oncorhynchus mykiss), catfish (Silurus asotus) and loach (Misgurnus anguillicaudatus) were examined by light, scanning and transmission microscopes. The egg micropyle of rainbow trout and catfish consists of a funnel-shaped vestibule and a tapered canal transversing the zona radiata. The micropyle of rainbow trout and catfish showed the similar structure with flat pit and long canal. The micropylar wall showed the clockwise spiral structure in rainbow trout. The micropyle of the loach showed the type with a hollow pit leading into a short canal and the micropylar wall showed the counterclockwise spiral structure. There are numerous and various size pores at the surface area around the opening in every experimented fish. Interconnecting ridges were observed in the unfertilized eggs of every fish.