• 한국작물학회지
• /
• 제52권1호
• /
• pp.81-88
• /
• 2007

본 연구는 농진청 종자은행에 보존된 한국, 중국 및 일본 재래종 콩과 한국 야생콩의 SSR profile 작성과 그들의 유전적 구조 해석을 위해 9개의 SSR 마커에 의해 분석되었다. 1. DNA profiling은 유전자좌별로 2,855(Satt458)점$\sim$4,368(Satt197)점이 분석되어 35,655건이 데이터베이스화되었다. 2. 총 대립인자수는 267개였고 유전자좌당 평균 29.6개의 높은 다형성을 나타냈다. 유전자좌별 대립인자 수는 21개(Satt532 및 Satt141)부터 58개(Sat_074)까지 나타났다. 자원내력별 대립인자수는 한국 야생콩에서 196개로 가장 많은 것으로 나타난 반면, 일본 재래종 콩에서는 가장 적은 115개로 나타났다. 3. 집단에 따른 유전자좌별 대립인자의 범위로 한국 재래종 콩이 가장 많은 5개의 유전자좌(Sat_074, Satt141, Satt286, Satt545, Satt458)에서 다음으로는 한국 야생콩이 4개의 유전자좌(Satt187, Satt532, Satt245, Satt197)에서 가장 넓은 것으로 나타났다. 그러나 대립 인자수면에서는 한국 재래종 콩이 5개의 유전자좌(Sat_074, Satt141, Satt197, Satt545, Satt458)에서 가장 많은 대립인자수를 나타냈고, 한국 야생콩은 나머지 4개의 유전자좌(Satt187, Satt532, Satt245, Satt286)에서 가장 많은 대립인자수를 나타냈다. 4. 대립인자 분포에 있어 전체적으로 한국 야생콩 집단은 재래종 집단들에 비해 고른 분포를 나타냈고 대립인자의 크기가 큰쪽(high ladder)에서보다 작은쪽(low ladder)에서 높은 분포를 나타냈다. 5. 재래종 집단들 간에 대립인자 분포를 살펴보면, 한국 집단은 Satt286(202 bp, 232 bp)에서, 중국집단은 Satt197(171 bp)와 Satt458(173 bp)에서 그리고 일본집단은 Sat_074(244 bp)와 Satt458(170 bp)에서 매우 높은 것으로 나타났다.

• Agricultural and Biosystems Engineering
• /
• 제7권1호
• /
• pp.13-17
• /
• 2006

The planocentric gear, known as wobble mechanism, has been used for speed reducing mechanism as an ingenious mechanism. The modem application can be found in the backrest adjusting mechanism of a vehicle reclinable seat, fluid pumps and aircraft hoist and winches. Higher speed reduction ratios, high load capacity, lower weight, and compactness are the main advantages of this gear. This paper presents velocity and static force analysis to investigate the friction lock of the planocentric gear. The rectilinear tooth profile is used to maximize the speed reduction ratio. The equivalent linkage system is used for the analysis of instantaneous motion. As the results, the transmission efficiency of the planocentric gear is found and the friction lock of the system is determined for the friction coefficients of journals. A numerical example that illustrates the developed analysis is presented.

• 농촌지도와개발
• /
• 제16권4호
• /
• pp.795-835
• /
• 2009

Rural tourism is a multi-faceted activities rather than farm-based tourism only. The study aims to investigate the profile of a consumer for each type of preferences of tourism activities. Data were collected from 308 people by field survey in rural areas. The study indicates that consumer satisfied with farmer's kindness and farmer's knowledge above all difference factors on tourism activities. The most preferences of activity's factor is program's quality which is include variety, characteristics, interest without regard to sex, age, companion. Both 'walking on the road' and 'climbing the Orum' is more likely than difference activities. It is important to have information on the characteristics and preferences of the consumers of the different types of tourism activities to develop program in rural tourism.

• 농촌지도와개발
• /
• 제23권1호
• /
• pp.101-114
• /
• 2016

Local food in rural area as a rural growth tool has to adapt to current market mechanisms by communication and promotion techniques. We need to know what and how local food consumers seek their benefits to market segmentations. The primary purpose of this study was to segment and profile the benefits of local food consumer so as to provide a better understanding of local food in Korea. A self-administered survey was obtained from 448 food consumer in the study area. Three distinct segments were identified based on the benefits; profit seeker (39.7%), passive consumers (19.0%), and value seeker (42.2%), and these were profiled with respect to socio-demographics and local food attitude-related features.

• 한국농공학회지
• /
• 제35권1호
• /
• pp.29-39
• /
• 1993

A model for estimating daily effective rainfall of upland crops was developed. The infiltration process was described by Green-Ampt infiltration model developed by Chu(1978). The model considers delayed surface ponding and surface detention storage under a uniform soil profile. The Green-Ampt parameters, that is, average hydraulic conductivity and average capillary pressure head on a sandy loam soil were determined from field experiment using Air-entry permeameter developed by Bouwer(1966). The model was verified by comparing measured and simulated surface runoff. The ratios of effective rainfall to total rainfall for red pepper, soybean, sesame and Chinese cabbage were evaluated using Borg's root growth model( 1986) respectively. The followings are a summary of this study results; 1.In a sandy loam soil average hydraulic conductivity was 3.28cm/hr and average capillary pressure head was 3.00cm. 2.The root growth of upland crops could be expressed by Borg's root growth model successively. 3.The measured and simulated surface runoff was agreed well with each other. 4.As the rainfall amount was increased, the ratio of effective rainfall to total rainfall was decreased exponentially till a certain growing period.

• 한국농공학회지
• /
• 제43권5호
• /
• pp.63-69
• /
• 2001

The main purpose of this study is to seek desalinization effect of subsurface drainage system with rice hull packing in Dae-Ho Reclaimed Land. After 4 years installed sub-surface drainage system, distribution of drained water electric conductivity (ECw) was 4.43~12.78 ds/m. The soil profile showed partial development of the soil structure and compaction of subsoils with increased bulk density. The bulk density of the subsoil was 1.42~1.66 g/cm$^3$, which might limit root growth. The soil color changed near the drainage pipe line. Distribution of soil extract solution ECe and SAR as subsurface drainage pipe position and drainage canal distance showed desalinization effect of subsurface drainage system with rice hull packing as widening effective zone of subsurface drainage pipe.

• 한국농공학회논문집
• /
• 제46권2호
• /
• pp.67-75
• /
• 2004

This study aims to investigate the dynamic behaviour of a parabolic arch with initial deflection by using the elasto-plastic finite element model where the von-Mises yield criteria have been adopted. The initial deflection of arch was assumed by the high order polynomial of ${\omega}_i$ = ${\omega}_o$${(1-{(2x/L)}^m)}^n$) and the sinusoidal profile of ${\omega}_i$ = ${\omega}_o$$\sin$(n$\pi$x/L). Several numerical examples were tested considering symmetric initial deflection modes when the maximum initial deflection of an arch is fixed as L/500, L/1000, L/2000 or L/5000. The effects of polynomials order on the dynamic behavior of arch were not conspicuous. The most unfavorite dynamic response occurs when the maximum initial deflection varies from L/1000 to L/4000 if the initial deflection mode is represented by high order polynomials.

• 한국농림기상학회지
• /
• 제1권2호
• /
• pp.110-118
• /
• 1999

This experiment was conducted to characterize the vertical transport trend of dissolved elements through throughfall, stemflow, effluent from Ao layer, and leachate out of soil profile on Pinus koraiensis stand in Experimental Forest of Kyunghee University, located in Kwangju, Kyunggi province for 12 months from July, 1998 to Jun, 1999. In addition, we investigated the content of dissolved elements and the factors influencing the water chemistry concentrations separately collected from the field. Water movement in the process of throughfall and stemflow from precipitation, and rainfall leached from Ao layer into soil water was governed by concentration of through fall, precipitation, rainfall intensity, seasonal variation, and other factors. Also, smaller changes of pH in soil water than that of dissolved elements in soil water could contribute buffer capacity, as well as balancing the concentration between cations and anions.

• Food Science and Biotechnology
• /
• 제14권3호
• /
• pp.328-333
• /
• 2005

Finite difference model and dynamic thermal property evaluation system were developed to estimate convection heat transfer coefficient by modeling temperature-time profile of beef cube in continuous flow sterilizing system. As input parameters of the model, specific heat and thermal conductivity values of beef frankfurter meat were independently measured from 20 to $80^{\circ}C$. Convection heat transfer coefficient was estimated by comparing simulated and measured temperature-time profiles. Actual temperature-time profiles of meat cube were measured at flow rates of 15, 30, and 45 L/min and viscosities from 0 to 15 cp, and mean values of convection heat transfer coefficients ranged from 792 to $2107\;W/m^2{\cdot}K$. Convection heat transfer coefficient increased with increase in flow rate and decreased as viscosity increased.

• 동아시아식생활학회지
• /
• 제25권5호
• /
• pp.867-879
• /
• 2015

To confirm basic nutrient contents of Korean honey as a food material, we assessed New Zealand Manuka honey by measuring proximate components, vitamin C and minerals of 16 kinds of honey harvested in South Korea. The proximate composition of each honey sample was as follows: moisture content 18.45~29.84%, crude protein 0.10~0.95% (vs Manuka honey 0.23%), crude fat 0.02~0.60% (vs Manuka honey 0.34%), crude ash 0.01~.52% (vs Manuka honey 0.24%) and carbohydrate 67.90~80.94% (vs Manuka honey 79.39%), respectively. In the case of free sugars analyze by HPLC, fructose showed a content of 26.12~49.84% which was highest in acacia honey and lowest in sorbus honey. Content of glucose was 19.38~36.12% and lowest in chestnut honey, whereas sucrose, lactose, maltose were absent. Total sugar contents were 64.16% which was less than Manuka honey (70.23%) and vitamin C was not detected in all samples. Minerals were detected 15~25 kinds, including K, Ca, Mg, Zn, Fe, Cu, Mo and so on. Ca was high in order of linden > canola > codonopsis > hedysarum honey, and K was higher than in Manuka honey in order of chestnut > hedysarum > codonopsis > jujube honey. Especially, these results suggest that Korean honey have a better nutrient content profile than Manuka honey.