The isolation of female gametes is precondition for the satisfactory micromanipulation of gametes in common buckwheat (Fagopyrum esculentum Moench.). Embryo sacs were isolated at flowering stage after brief treatment with minimal concentrations of cell-wa

Amino acid composition of proteins in Italian millet, Common millet and sorghum were invstigated by HCI hydrolysis method. The optimum condition was obtained by hydrolysis at 110 for 24hr. As major amino acids from protein hydrolyzate, the content of tyosine, arginine and phebylalanine were 7.06%, 6.79% and 6.44%, respectively. The content of glutamic acid in Common millet, Italian millet and Sorghum were 5.73%, 5.64% and 5.46%, respectively. Glycine content was about 2.93% in three samples. Contents of crude protein and pure protein in Italian millet, Common millet and sorghum were determined by micro-kjeldahl method. Crude protein contents were slightly higher than that of pure protein. Protein content of sorghum was higher than those of Italian millet and Common millet. For SDS-PAGE analysis, Italian millet showed more soluble proteins including 50kDa, 30kDa and smaller proteins than other cereals. In particular, Common millet and Sorghum only solubilized proteins less than 15kDa.

To compare the composition of volatile flavor components of three different cultivars of rice, Hyangnambyeo (aromatic cultivar), Heugjinjubyeo (pigmented cultivar) and Dongjinbyeo (normal cultivar), the volatile flavor components of brown rice were isolated by Likens-Nickerson simultaneous steam distillation and extraction apparatus. The flavor concentrates obtained were analyzed by gas chromatography and gas chromatography-mass spectrometry. A total of 65 components, including 14 aliphatic aldehydes and ketones, 7 aliphatic alcohols, 8 aromatic alcohols, 13 hydrocarbons, 9 esters, 7 aliphatic acids, and 7 miscellaneous components were identified. The aliphatic aldehydes, which are known as contributors to the overall flavor of cooked rice, were present in larger amounts in Hyangnambyeo than in Heugjinjubyeo and Dongjinbyeo, while the difference in quantity of these components between Heugjinjubyeo and Dongjinbyeo was not remarkable. Hyangnambyeo and Heugjinjubeyo contained 562 ng and 259 ng of 2-acetyl-1-pyrroline per gram of brown rice based on dry weight, respectively, which is a key compound contributing to the popcorn-like aroma in aromatic rice. Dongjinbeyo contained about 6 ng.

The main aim of this study is to propose the improvement guidelines for the rural communit;- facilities(short as RCFs) in the village level. 28 villages were selected in consideration of the travelling distance to the nearest city, farming types and percentage of farm to total land. Through the analyses of the physical conditions and utilizing practices of RCFs in case villages, the tentative improvement guidelines were finally formulated. The major results of the study were summarized as follows ' 1. Most villagers thought the village hall and Jungjamok(Korean-style outdoor rest point) being centrally located, which was reflected in their high satisfaction with the accessibility to RCFs.However, they evaluated that above two places were too small and old for normal use, so set forth their views of high dissatisfaction on the scale of RCFs, 2. Analyses results of the survey in the study showed the ranking order of service level of RCFs as following; the village hall l rest building for the aged 1 rural-pocket park 1 village store / playground.And the need for cultural function was much more highly expressed than merely meeting function. 3. Considering together with the analysis results of this study and the related referencing guidelines, it is proposed to introduce the village hall, shop, and village store as basic ones of RCFs in the village level, which should form a single complex connected mutually and functionally each other.

Physiology and genetics of early maturity in cereals are the subject of practical as well as scientific interest for agronomist and plant breeders, Thorough understanding of the true nature of such a complex character requires physiological and genetical knowledge about the internal factors, which are closely bound up with and react to some particular external or environmental factors. From the practical point of view. experiments should be conducted under controlled conditions. especially the day length and temperature, so that the genotypic differences pertaining to these factors may be discerned. Takahashi and Yasuda (1958, 1970) maintained that at least three physiological factors were responsible for determining earliness in barley. namely. (1) spring and winter habit of growth or vernalization requirement, (2) ogitioeruiduc response or sensitivity to short-day, and (3) earliness factor in a narrow sense or minimal vegetative growth. The same situations were true in common wheat also (Yasuda and Shimoyama, 1965), In this report. physiology and genetics of internal factors and their relations to the time of heading in the field will be presented with some problems concerning differences in mechanism of early maturity between barley and wheat.

A lot of studies of ship's economy are on the traditional fields such asreducing propulsion resistance, raising cargo handling rates and lessening building consts, but there are few researches on the merchant ship's economy concerning their deadweights and speeds according to shipping companies managerial cercumstances. Contrary to the contemporary trend that "the bigger, the better, if the cargo handling rate could increased sufficiently to hold down port time to that rate of smmaler vessels", this paper demonstrates the existence of certain limits in ship's size and speed according to the coditions of the freight rates, voyage distances, cargo handing rates, prices of fuel oil, interst rates etc. Fom the curves of criteria contour for various ship's deadweights and speeds which are depicted from the gird search method, one can get the costs and the yearly profit rates under the conditiions of large volume with long term contracts for the transportation of bulk cargoes. In estimating ship's transportation economy, the auther takes the position that the profit rate method is properer than the cost method, and introduces the calculation table of the voyage profit rate index. The use of the criteria contours will be of help to ship owners in determining the size and speed of the ship which will be built or purchased and serve in a certain trade route.

There may be a lor of studies on the economic design of ship for the most favorable combination of design basis on the owner's request. However, there are few on the economical ship's size and speed for the ship owner's stand point. This paper describes on the optimal ship's size and speed to the given marine commercial environments for the owner's requirement to the shipyard. As the result of the paper, the criterion curve of bulk carrier will also be used to assess existing ships for their profitability.

추파밀인 Diplomat이 가지고 있는 흰가루병에 대한 높은 포장저항성의 유전자작용을 검토하기 위하여 이병친인 Caribo와 교배하여 여기서 나온 6세대에 대한 흰가루병의 이병률을 출수개화기와 성숙기에 판독한 결과를 검토한 결과 저항성유전에는 상가적 작용이 크게 영향을 하고 있으며 우성인자효과는 극히 미미하였다. 협의의 유전력은 출수개화기에는 낮았으니 성숙기에 이르러 이병성인 것과 저항성인 것간의 변이가 커짐에 따라 유전력은 크게 증가되었다. 성숙기에까지 저항성을 유지하는 개체를 선발하는 것이 바람직한 것으로 고찰되었다