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RISS 인기검색어
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- 저자 : 허만규(Man Kyu Hur) (검색결과 6 건)
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허홍욱,허점이,허만규 부산대학교 사범대학 1991 교사교육연구 Vol.22 No.-
Common buckwheat (Fagopyrum esculentum M.) seeds were treated with various concentrations of mercuric chloride solution, and germination and growth, protein content, and protein patterns of seedling stage were examined for 5 days. The experimental results were as follows: 1. The effect of mercuric chloride was serious in the region of roots. The length of growth including roots and hypocotyl was shortened in proportion to the increase of mercuric chloride concentration. Furthermore, the roots changed into brown and showed severe inhibition in growth. 2. On the first day after the sowing, fresh weight of seedlings was somewhat higher in the mercuric chloride-treated groups were lower in the rate of the increase of fresh weight than the controlled one. 3. The protein content of control, and in low concentration groups decreased until the 4th day after sowing, but it increased on the 5th day. In the groups of above 300ppm of mercuric chloride concentration, on the other hands, protein content decreased continuously. The decrease rate of protein content was low in proportion to the increase of mercuric chloride concentration. 4. In the soluble protein patterns of SDS-PAGE, the intensity with time came considerably down in all the experimental groups. The decrease rate of intensity was greater in low molecular weight bands than that in high ones. The decrease rate of intensity was low in proportion to the increase of mercuric chloride concentration.
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허만규,허홍욱,오광중 한국환경과학회 1997 한국환경과학회지 Vol.6 No.2
The purpose of this study was to examine the questioning styles in middle school environmentology textbook in terms of frequency, type, and placement of questions. It was also to analyse and to compare the kinds of scientific inquiry processes elicited by the questions in the topics of textbooks. The instrument was the Textbook Questing Strategies Assessment Instrument (TQSAI) developed the Cooperative Teacher Preparation Project, University of California. The average number of questions per topic was only 1.09 and the ratio of questions to sentences was 2.5%. Most of questions were in explanatory place(75%). Nearly 90% of experienced questions types were reasoning or application. The frequencies of non-experiential question were higher than those of experiential question. In action, there were much kinds of question-styles.
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절개지에서 토사유출 방지를 위한 둥근잎매듭풀 (콩과) 의 이용
허만규,허홍욱 한국환경과학회 1998 한국환경과학회지 Vol.7 No.4
The washout on incision cliff is a serious problem. Incision cliff if not carefully done, can contribute to soil erosion and, by removing covering plants could have a large impact on the temporary of normally the quality of water. Because the washout of soil is influenced by its surface, it is necessary to prevent or diminish soil particle by plantation of grass species. Kummerowia stipulacea is an useful species that diminish the injury of soil and rainwater. We study that estimates of preventing soil erosion and river overflow can be obtained from the experimental model developmented by several equators. Many potential contaminants are removed by filtration as the water moves slowly through the fields of K. stipulacea.
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부산 가덕도 주변해역의 동물플랑크톤 군집의 조성과 분포
문두호,허만규,이상현 부산대학교 사범대학 1998 교사교육연구 Vol.36 No.-
Composition and distribution of zooplankton community of sea water of the Kaduk Island have been studied on the samples collected four times from March to December in 1997. 35 taxa and 4 unconfirmed species of zooplankton have been identified. It consisted of 28 species of Protozoa, 1 larva of Poriferan, 1 species of Annelida, 1 larva of Mollusca, 2 species of Rotifera, 4 species and 1 larva of Athropoda, and 1 larva of Phoronida. The occurrence of major species was showed that Ceratium fusus was dominantly occurred from March to June, Noctiluca milialis in September, and Copepoda larva in December, respectively. Zooplankton abundance was high in June (4,217 inds./ℓ) and low in March (340 inds./ℓ). Indices of dominance were ranged from 0.41 (in December) to 0.80 (in June). Species diversity indices were ranged from 1.18 (in June) to 2.23 (in December).
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정명기,허홍욱,허만규 한국유전학회 1995 Genes & Genomics Vol.17 No.3
Allozyme study in Korean cultivated radish, Raphanus sativus L. var. hortensis Backer f. acanthiformis Makino, was conducted to estimate the levels and distribution of genetic variation among populations using starch gel electrophoresis. Populations of cultivated radish show moderate levels of allozyme variation; the mean percentage of polymorphic loci was 39.4%, mean number of allales per locus was 1.52, and mean expected heterozygosity was 0.079. It is probable that a combination of outcrossing breeding system, high fecundity, and cultivated status may in part be explanatory factors contributing a moderate level of genetic diversity within populations. An overall slight deficiency of heterozygotes relative to Hardy-Weinberg expectations (mean F_(IS)=0.076) indicates that consanguineous mating occur within cultivated radish populations. Of the total genetic variation found in cultivated radish populations examined, only 7% is due to differences among populations (mean G_(ST)=0.073). It is supposed that the cultivated status of radish may influence the considerably low population differentiation. In addition, seed dispersal by humans leads to enhanced levels of gene flow and decreased population divergence in Korean cultivated radish.
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