The ages of field stars given in the catalogue of Cayrel de Strobel et al. (1985) are derived by the five different methods with combination of theoretical isochrones. By using these ages and metal abundances homogenized by Lee and Choe (1988), the age-metallicity relations are obtained. For disk stars of [Fe/H] > -0.9, the present age-metallicity relations are nearly consistent with those given by Twarog (1980) and Carlberg et al. (1985).

This study was surveyed the preference for the regional food and food choices according to Region, Age, Sex. The subjects were 943 residing in Seoul and Cheon Nam region. The summarized result are as follows; The survey about the preference for the regional food showed that subjects in Cheon Nam has higher preference for the Cheon Nam food and subjects in Seoul for the Seoul food respectively. The most subjects marked very high preference scores about familiar food. The preference for the regional food and food choices were effected by main growth region. Subjects brought up in Cheon Nam like Cheon Nam food especially fresh raw fishes(WHOI) and fermented fishes(CHOT GAL) more than those brought up in Seoul, although both of them reside in Seoul now. But they were brought up in Cheon Nam, subjects residing in Cheon Nam or Seoul now showed no difference in preference for Cheon Nam food. Subjects in Cheon Nam showed higher preperence for fresh raw fishes(WHOI), fermented fishes(CHOT GAL), especially in older men.

We study the luminosity and mass functions of open clusters using the data published by the United States Navel Observatory to figure out the relationships between these functions and the cluster ages. Slope ranges of the luminosity (dlogN/dMv) and mass function (-dlogN/d(log m/m@)) are 0.09-0.52(avg.=0.26, var.=0.01), 0.43-5.49(avg.=1.7, var.=0.63) respectively. These large ranges do not support the mass function is universal, but the function is time dependent. Despite of the poor relationship between the luminosity function and the cluster age, we obtain a good relationship in the mass function. We can understand this good relationship with a viewpoint of stellar evolution. We do age analyses in terms of the metal abundance and the number density of the open clusters. We get the fact that the less metal abundances and the less number densities, the more steep in the slopes of the mass function.

영양액을 사용한 고온하의 Growth chamber에서 근류균을 접종한 Alfalfa의 수양시기별 작물명부위에 대한 실표시비의 영향에 관한여 미국 University of Nevada에서 실험한 결과들을 요약하면 다음과 같다. 초장과 그장에 대한 실표시비의 효과는 높이 인정되었으나 근장에 있어서는 유의성이 없는 다소의 증가을 보였다. 실표시비의 작물의 용접과 건물수량은 무실표구에 비하여 2배이상의 증가를 보여 실표시비의 높은 효과를 나타냈다. 근류의 착

저온하(低溫下)의 Growth chamber에서 근유균(根瘤菌)(R-12)를 접종(接種)한 Alfalfa의 수확시기별(收穫時期別) 작물(作物) 각부위(各部位)의 질소시비(窒素施肥)의 효과에 관하여 미국(美國) University of Nevada에서 실험(實驗)한 결과(結果)들을 요약(要略)하면 다음과 같다. 초장(草長), 근장(根長) 및 전장(全長)에 있어서는 질소시비(窒素施肥)의 효과가 나타나지 아니하였으며 작물(作物)의 용적(容積)과 건물수량(乾物

본(本) 연구(硏究)는 마우스의 이유시체중(離乳時體重) 및 60일령(日齡) 체중(體重)에 대한 유전자(遺傳子) 효과(效果)를 구명하기 위하여, BALB/c, CBA, C3H 및 C57BL의 4 계통(系統)을 양면교잡(兩面交雜)시켜 생산(生産)된 후대(後代) 343마리를 대상으로 조사(調査) 분석(分析)한 것이다. 공시(供試)된 마우스는 1984년(年) 11월(月)부터 1985년(年) 2월(月)까지 경북대학교(慶北大學校) 농과대학(農科大學) 부속동물사육장(附屬動物飼育場)에서 사육(飼育)되었으며, Harvey의 방법(方法)에 의하여 일반결합능력(一般結合能力), 모체효과(母體效果), 특수결합능력(特殊結合能力) 및 상반교잡(相反交雜) 효과(效果) 등(等)이 분석(分析)되었다. 일반결합능력(一般結合能力) 효과(效果)는 이유시체중(離乳時體重)에서 -0.6033~0.5298 그리고 60일령(日齡) 체중(體重)에서 -0.5086~1.0012로 추정(推定)되었으며, 두 형질(形質)에 대한 일반결합능력(一般結合能力) 효과(效果)는 BALB/c와 C57BL이 CBA와 C3H보다 우수하였다(P<0.05). 모체효과(母體效果)는 C3H가 BALB/c보다 크게 나타났다(P<0.05). 모체효과(母體效果)는 이유시체중(離乳時體重)에서 -0.9678~0.4609 그리고 60일령(日齡) 체중(體重)에서 -1.1886~0.7029로 추정(推定)되었다. 특수결합능력(特殊結合能力) 효과(效果)도 유의성(有意性)이 인정(認定)되었는데(P<0.05), 그 효과(效果) 추정치(推定値)는 이유시체중(離乳時體重)에서 -0.1999~0.3380 그리고 60일령(日齡) 체중(體重)에서 -0.4056~0.3317 이었다. 상반교잡(相反交雜) 효과(效果)는 BALB/cC57BL 및 BALB/cC3H에서 크게 나타났는데 이유시체중(離乳時體重)에 있어서 효과(效果) 추정치(推定値)는 각각(各各) -0.5049 및 0.4972 그리고 60일령(日齡) 체중(體重)에 있어서 효과(效果) 추정치(推定値)는 각각(各各) -1.0336 및 1.2793이었다.

Age specific characteristics in Korean diet and their changes were analyzed with the demand model including the number of family members by age group as independent vasiables Urban household budget data, 773 household data in 1977 and 947 household data in 1983, was applied to the demand model. A series of F-test was carried out to set up the age groups by food item. The main results can be summarized as follows; 1. Food consumption patterns are remarkably different between 0-13 years old age generation and over 40 years old generation. The 0-13 years old generation reveals higher preference for milk, wheat product, fruit and milk and lower preference for rice and vegetable than any other age generation. This characteristics of the childhood diet has been formed In the generation born after 1970's and thus will be reserved as their generational characteristics. On the other hand, over 40 years old age group prefers rice and fish to fruit, milk and wheat product. Therefore we can conclude that over 40 years old age group maintains the traditional Korean diet pattern. 2. The preference for fish is low. in 20-30 years old age group than in any other age group and wheat product is Preferred highest in 6-13 years old age group of all age groups. Meanwhile the most remarkable change In food consumption pattern is shown in meats and vegetables. Namely in 30 40 years old age group the preference for meat has increased substantially and that vegetable has decreased to a great extent. 3. The declining per capita consumption of rice spreads like a wave to higher age. groups, but over 40 years old age group bas played an important role in reducing the decreasing rate of rice consumption. In order to restrain the declining rice consumption a special integrated food policy is required to induce rice consumption in less 30 years old generation.

Sixty-eight open clusters have been sampled in proportion to the age fraction of the number distribution of open clusters in Galaxy in order to find out the aging effect in number density distribution of member stars of the open clusters. The Ring method can be used to establish the number density distribution around the central regions of the open clusters. Their number density distributions have been classified to several types according to their shapes. They have been arranged to a serial distribution of A to F in age.

From the uvby, H β photometry of intermediate population II F-stars in the catalogue of Olsen (1983), we derived age-metallicity relations for these stars, using Hejlesen's (1980) isochrone. The derived age-metallicity relations well coincide with the theoretical predictions by the unclosed two-zone model of Lee and Ann (1981). There are few extremely metal poor F-stars in the vicinity of the Sun, and it is very likely that the initial rapid metal enrichment in the galactic disk might have been processed through the fast collapse of the disk at the very early epoch.

고추 역병균(疫病菌) Phytophthorn cepsici의 토양중(土壤中) 밀도(密度)와 고추의 생육기(生育期) 및 온도(溫度)가 역병발생(疫病發生)에 미치는 영향을 구명(究明)하기 위하여 실내실험(室內實驗)과 비닐하우스 재배실험(栽培實驗)을 했던 바 다음 몇가지 결과(結果)를 얻었다. 인위적(人爲的)으로 접종(接種)한 병원균(病原菌)의 초기 생존수(生存數)는 무살균토양에서 월등히 많았으나 13일(日)이 경과된 후에는 급격히 감소되어 35일(日) 후에는 살균 무살균토양 모두 생존균(生存菌)을 검출(檢出)할 수 없었다. 토양 1g당(當) 최소 5개 이상의 유주자낭(遊走子囊)에 해당하는 전염원(傳染源)이 있어야 고추역병(疫病)이 발생(發生)되었으며 그 이상 전염원량(傳染源量)이 증가될수록 발생(發生)이 증가되었고 잠복기(替伏期)도 짧아졌다. 동일(同一)한 양(量)의 병균(病菌)을 접종(接種)했을 때 초기(初期)에는 묘령(苗令)이 어릴수록 발병(發病)이 많았으나 4주후(週後)부터는 묘령(苗令)에 관계없이 비슷하였다. 잠복기(潛伏期)는 묘령(苗令)이 어릴수록 짧았으나 병지속(病持續期間)은 생육기(生育期)에 따른 차이(差異)가 인정되지 않았다. 고추 유묘(幼苗)의 이병율(罹病率)은 에서 가장 높았고 순(順)이었으며, 전혀 발병이 없었던 와 에 처리(處理)했던 식물(植物)을 처리로 옮겼을 때 처리식물은 50%까지 계속 발병을 보인 반면 는 전혀 발병되지 않았다.)이 심(甚)하여도 종자전염율(種子傳染率)은 높지 않았다. 그리고 발아율(發芽率)에서는 반문(斑紋)의 영향(影響)이 없었다. 저항성품종(抵抗性品種) 검정(檢定)에서 Columbus외(外) 14품종(品種)이 이병성(罹病性), Chief외(外) 14품종(品種)이 중도저항성(中度抵抗性), 장백(長白)콩외(外) 17품종(品種)이 저항성(抵抗性)인 것으로 나타났다.(增加)되었는데, 특히 diazinon 과 decamethrin 처리(處理)에서 높은 증가율(增加率)을 보였다. 7. 약제처리(藥劑處理) 후(後), hopperburn발현도(發現度)는 약제(藥劑)의 종류(種類) 및 처리농도(處理濃度)에 따라 큰 차이(差異)를 보였는데, hopperburn발현(發現)은 diazinon, decamethrin 처리(處理)에서 크게 촉진(促進)되었다. 이상의 결과(結果)를 종합적(綜合的)으로 볼 때, diazinon 과 decamethrin의 처리(處理)는 포장(圃場)에서 벼멸구의 산란력(産卵力)과 성충수명을 증대(增大)시키고, 식이활동(食餌活動)을 촉진(促進)함으로서 벼멸구의 resurgence를 유발(誘發)하고 아울러 수도체(水稻體)의 hopperbun을 가속화시킬 가능성(可能性)이 있음을 알 수 있었다.는 점차 약하여 졌으나 catalase, invertase는 그 활성도가 일단 숙성중기에 높아졌다가 낮아졌다.n 이 pH 4.2이고 temperature는 이었다. 그리고 5'-phosphodiesterase 생성에서 최적 탄소원은 sucrose이고 질소원은 이고 corn steep liquor나 혹은 yeast extract를 각각 0.01%씩 첨가한 구는 첨가하지 않은 control 구보다 20%의 5'-phosphodies

New empirical relations between stellar CaII emission and rotation or age are derived by analyzing Wilson's CaII flux measurements (1968, 1978) of lower main sequence stars, and then we correlate them with their age and rotation rate. It is found that stellar chromospheric emission decays smoothly with age as a star slows down rotationally, establishing that both the emission level and rotation rate decrease with the square root of age.

Analyses of an integrated form N ( τ ) = ∫ ∞ τ n ( τ ) d τ of the distribution of cluster ages, rather than its differential form n ( τ ) , demonstrate that the observed distribution has clusters older than about 500 million years in a significant excess over theoretical model distributions. Considerations on cluster disruption processes show that a single disruption time-scale, frequently employed by current theoretical models, is no longer an adequate parameter for describing survival probability of clusters over wide age range, because different initial conditions of these clusters produce corresponding spreads in their lifetimes. To take into account for the spread in initial conditions, we have introduced an age-dependent disruption time, and deduced its age-dependence from the present-day age distribution of clusters. Results show a distinct two-stage variation: The newly introduced disruption time stays constant at about 50 million years for clusters younger than about 100 million years, while for clusters older than that it increases monotonically with the cluster age. This leads us to conclude that clusters experience different types of disrupting causes as they get old.

Making use of a relation proposed by Wielen (1977), a new empirical relation between Call emission flux and stellar age is derived by analyzing Wilson and Woolley's spectroscopic data (1970) of late type main sequence stars (K0-M5) and kinematic properties of those stars given by Gliese (1969). The proposed relation shows that the emission flux excess of the Call H-K lines, F ′ k + F ′ k introduced by Linsky et al. (1979) decreases with stellar age τ as τ − 0.51 , consistent with the inverse square law as noted by Skumanich (1972).

For ∼ 240 nearby stars their age and mass were determined and kinematic parameters determined for 362 stars, applying Woolley's three-dimensional potential. Metallicity and kinematic parameters of these stars were correlated with their age, suggesting the slow collapse ( t ≳ a few billion years) of the Galaxy and the initial rapid enrichment in metal abundance ( Δ Z ≈ 1 / 3 Z 1 (present) for ∼ 4 × 10 8 yrs). The late slow enrichment rate is given by d ( Z / Z ⊙ ) / d t = 5.9 ∼ 7.0 ± 3.4 per Gyr.