• Applied Biological Chemistry
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• 제27권1호
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• pp.14-20
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• 1984

우리 나라에서 비교적 생산량이 많은 사과과실 3품종(Fuji, 홍옥, 국광)을 대상으로 향기성분을 분리 및 동정하고, 또한 성숙시기별로 향기성분의 함량변화를 측정하였다. 향기성분은 30종 이상 분리되었고 그 중 ester 23종, alcohol 9종 및 aldehyde 2종을 동정하였다. 성숙중 향기성분의 종류와 함량은 증가하였으며 1-butanol, isobutyl butyrate, 2-pentanol, ethyl valerate 및 hexanal 등의 함량이 많았다.

• 한국수산과학회지
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• 제49권4호
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• pp.499-508
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• 2016

We investigated regional differences in the growth and maturation rate of Pacific cod in the East and Yellow Seas. Significant regional differences were detected in the von Bertalanffy growth equation and mean length at maturity (L₅₀). Cod in the East Sea grew at a faster rate than those in the Yellow Sea, with females growing faster than males in both populations. Cod of both sexes matured earlier in the Yellow Sea (age of maturity: 2.3 years for males, 2.6 years for females) than in the East Sea (age of maturity: 3.9 years for males, 4 years for females). These regional differences suggest that Pacific cod in the Yellow Sea, which is at the southwestern extremity of global cod distribution and thus likely to be an inhospitable habitat for this species, have adapted to their environment by developing earlier maturation and slower growth than cod in the East Sea or the Korea Strait. These regional differences must be taken into account when setting biological reference points for management of the Pacific cod fishery in Korean waters.

• 식물분류학회지
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• 제51권3호
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• pp.319-325
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• 2021

Tripterygium wilfordii Hook.f. (Celastraceae), collected from Phia Oac-Phia Den National Park of Vietnam, is reported here as a new generic and species record for the flora of Vietnam. The genus Tripterygium differs from other genera of Celastraceae by its samara fruits, which become three-winged at maturity, and a scandent shrub. Taxonomic notes, descriptions, line drawing and photographs are provided, together with short notes on the distribution, ecology and phenology of Tripterygium wilfordii Hook.f. (Celastraceae).

• 한국동물생명공학회지
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• 제39권1호
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• pp.31-39
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• 2024

Background: The biological information of fish, which include reproduction, is the prerequisite and the basis for the assessment of fisheries. Methods: The aim of this work was to know the reproductive biology with the first sexual maturity (TL₅₀) and the spawning period for 58 mainly fish species in the waters around La Réunion Island (Western Indian Ocean). Twenty families belonging to the Actinopterygii were represented (acanthuridae, berycidae, bramidae, carangidae, cirrhitidae, gempylidae, holocentridae, kyphosidae, labridae, lethrinidae, lutjanidae, malacanthidae, monacanthidae, mullidae, polymixiidae, pomacentridae, scaridae, scorpaenidae, serranidae, sparidae; 56 species; n = 9,751) and two families belonging to the Elasmobranchii (squalidae, centrophoridae; 2 species; n = 781) were sampled. Between 2014 and 2022, 10,532 individuals were sampled covering the maximum months number to follow the reproduction periods of these species. Results: TL₅₀ for the males and the females, respectively, ranged from 103.9 cm (Acanthurus triostegus) to 1,119.3 cm (Thyrsitoides marleyi) and from 111.7 cm (A. triostegus) to 613.1 cm (Centrophorus moluccensis). The reproduction period could be very different between the species from the very tight peak to a large peak covered all months. Conclusions: Most species breed between October and March but it was not the trend for all species around La Réunion Island.

• Animal cells and systems
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• 제4권4호
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• pp.329-336
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• 2000

Life table experiments were performed in order to examine the effects of food quality on Moina macrocopa fed with four kinds of algal foods, Botryococcus sp., Scenedesmus subspicatus, Selenastrum capricornutum, and Chlorella sp., at $20^{\circ}C$ . The temperature effects on M. macrocopa were also assessed, feeding Chlorella at $17^{\circ}C$,$20^{\circ}C$,$25^{\circ}C$, and a combination of $28^{\circ}C$ (light) and $25^{\circ}C$ (dark). The cartilaginous Botryococcs cells were Inappropriate food for Moina. Among the foods tested, Chlorella was the food of the best quality in all accounts of life history traits. Moina grown on Chlorella showed higher net reproductive rate ($R_0$), longer mean and maximum longevities, earlier mean age at maturity, longer mean carapace length at maturity, larger mean clutch size, and shorter mean time interval between clutch productions than those grown on Selenastrum and Scenedesmus. An optimal temperature for Moina was $20^{\circ}C$ . When Moina were grown on Chlorella at $20^{\circ}C$, they showed the highest r, the highest $R_0$, the shortest T, the longest mean longevity, the earliest mean age at maturity, the longest mean carapace length at maturity, and the largest mean clutch size. The results of life table experiments showed that the individual and population growth patterns were much more affected by low temperature $17^{\circ}C$, than by high temperature ($\geq 20^{\circ}C$). In the optimal condition, the r value was very high, 5.1 in $d^{-1}$. In conclusion, the food quality and the temperature are the most important factors to govern the size and continuity of Moina population, by which the individual growth rates and reproductivity of members in the population can be controlled to survive in their environment such as small and temporary water bodies in nature.

• 한국환경농학회지
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• 제18권4호
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• pp.378-383
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• 1999

본 연구는 수피 부산물 비료의 돈분 부산물 비료의 부숙단계별 시료의 유기물 분획의 함량 변화, ${\Delta}log$ K값과 RF값 등의 분광학적 특성 변화, 원형여지 chromatograp의 변화를 측정하여, 부숙도의 판정 기준 설정을 위한 기초 자료로 활용하는데 그 목적이 있다. 그 결과를 요약하면 다음과 같다. 수피와 돈분 부산물빌 중 HA-C와 FA-C의 함량은 대체로 부숙이 진행됨에 따라 감소하는 경향이었고, HA-C/FA-C 비는 증가하였다. 수피와 돈분 부산물 비료의 ${\Delta}log$ K값은 부숙이 진행됨에 따라 감소하였으며, RF값은 증가하였다. 생수피의 부식산 형태는 $R_p$ 형태였으나, B형태를 거쳐 120일경과 후 A형태로 변화하여 거의 완숙상태에 도달하였으며, 돈분 부산물 비료의 경우 40일경과 후에도 B형태로 나타나 유기물질의 부숙이 진행중인 것으로 판단되었다. 수피부산물 비료의 원형여지 chromatograph는 120일경과 후에 규칙적인 톱니 모양을 하고 있어 완숙단계에 이른 것으로 판단할 수 있었으나, 돈분 부산물의 경우는 40일이 경과한 후에도 부분적으로 불규칙적인 모양을 하고 있어 부숙이 진행되고 있는 상태인 것으로 판단할 수 있었다.

• 한국패류학회지
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• 제27권1호
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• pp.43-53
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• 2011

The gametogenic cycle and the spawning season in female and male Cyclina sinensis were investigated by quantitative statistical analysis using an image analyzer system, and the biological minimum size (the size at 50% of sexual maturity) was calculated by combination of quantitative data by size and von Bertalanffy's equation. Compared the gametogenic cycle by quantitative statistical analysis with the previous qualitative results in female and male C. sinensis, monthly changes in female and male gametogenic cycles calculated by quantitative statistical analysis showed similar patterns to the gonadal stages in female and male reproductive cycles by qualitative histological analysis. Comparisons of monthly changes in the portions (%) of each area to eight kinds of areas by quantitative statistical analysis in the gonads in female and male C. sinensis are as follows. Monthly changes in the portions (%) of the ovary areas to total tissue areas in females and also monthly changes in the portions of the testis areas to total tissue areas in males increased in March and reached the maximum in May, and then showed a rapid decrease from June to October. Monthly changes in the portions (%) of oocyte areas to ovarian tissue areas in females and also monthly changes in the portions of the areas of the spermatogenic stages to testis areas in males began to increase in March and reached the maximum in June in females and males, and then rapidly dropped from July to October in females and males when spawnig occurred. From these data, it is apparent that the number of spawning seasons in female and male C. sinensis occurred once per year, from July to October. Monthly changes in the number of the oocytes per mm2 and in the mean diameter of the oocyte in captured image which were calculated for each female slide showed a maximum in May and reached the minimum from December to February. Therefore, C. sinensis in both sexes showed a unimodal gametogenic cycle during the year. The percentage of sexual maturity of female and male clams ranging from 25.1 to 30.0 mm in length was over 50% and 100% for clams over 40.1 mm length. In this study, the biological minimum size (sexually mature shell lengths at 50% of sexual maturity) in females and males were 26.85 and 26.28 mm, respectively.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2003년도 제10차 국제학술회의 및 추계정기 학술발표회
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• pp.46-46
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• 2003

An important function of pollen aperture is believed to be regulating the water balance of the pollen when subjected to changes in humidity (Shukla, et al. 1998). It has been reported that mature barley pollen rapidly swells upon hydration and pollen tube emerges in a few minutes of germination (Anthony and Harlan, 1920). Although, there could be other factors responsible for rapid hydration of pollen. However, K is widely known for its rapid action as an osmotic regulator (Heslop-Harrison and Heslop-Harrison, 1996). In the present study, changes in K distrbution were traced during different stages of pollen maturation in barley. The existence of K at the aperture area of matured pollen may possibly play other import physiological roles. For example, K is reported to be an essential constituent of pollen germination and even required in higher concentration for pollen tube growth(Fan et al., 2001). These results suggest that there could be a possible relationship between K, located at the aperture area and rapid uptake of water by pollen.

• 한국응용곤충학회지
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• 제18권2호
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• pp.101-106
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• 1979

대두의 주요해충인 콩나방의 피해를 경감시키기 위해 생물학적구제책을 모색하기 위해서 재래수집종에 콩나방피해율과 형태적특성과의 관계를 검토하였다. 또 품종및 경종조건을 달리한 후 콩나방의 피해를 조사한 결과는 다음과 같다. 1474계통에 대한 콩나방피해율은 최고$38\%$에서 전혀 피해가 없는 계통까지 분포하고 평균피해율은 $5.2\%$이였다. 형태적특성으로서 협의 모용밀도 및 색과 콩나방의 피해율과는 일정한 상관성이 없으나 콩나방피해율과 maturity group 또는 진딧물피해와는 공히 $5\%$ 수준에서 정의 상관관계가 있었고 maturity group V에서 가장피해율이 높았으며 일반잎피해정도와 콩나방피해와는 부의 상관관계가 있었다. 특이한 것은 청색의 종피색을 띤 계통들에서 콩나방피해가 현저히 늘은 점이다. 파종기별 콩나방의 피해정도는 6월20일 파종구가 제일 심하여 만파구가 피해율이 현저히 높은데 이들 피해정도는 착협시기뿐만 아니라 착협에서 성숙기까지의 기간에도 관계가 있는것으로 보여진다. 재식거라에 따른 중나방피해는 소식할수록 큰 편이고 6개품종중 봉의, 충북백이 저항성인 반면 clark, 금강대립이 이충성품종으로 나타났다.

• 한국작물학회지
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• 제53권1호
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• pp.34-41
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• 2008

건강 기능성 농산물로 주목을 받고 있는 검정콩의 isoflavone과 soyasaponin ${\alpha}g$와 ${\beta}g$의 축적 추이를 검토하였다. 또한 이들 항산화 성분을 고함유한 고 기능성 검정콩 생산을 위한 재배기술 확립에 기여하고자 하였다. 얻어진 결과는 다음과 같다. 1. 검정콩의 등숙기간 중 항산화 성분인 isoflavone과 soyasaponin ${\alpha}g$와 ${\beta}g$의 함량은 대체로 수확기$(R_8)\;6{\sim}7$일전에 가장 높았다. 이는 고항산화 콩을 생산하려면 수량 중심의 수확시기보다 $3{\sim}7$일 정도 빨라야 함을 의미한다. 2. 검정콩 종실의 등숙기간 중 총 isoflavone 함량은 일품 검정콩은 개화 후 61일, 흑청콩은 개화 후 77일에 가장 높았다. 검정콩 종실의 soyasaponin ${\alpha}g$와 ${\beta}g$의 함량은 일품 검정콩은 개화 후 61일에, 흑청콩은 개화 후 71일에 가장 높았다. 3. 검정콩 잎의 등숙기간 중 총 isoflavone함량은 일품검정콩과 흑청콩 모두 개화 후 55일에 가장 높았다. 검정콩 잎의 soyasaponin ${\alpha}g$의 함량은 일품검정콩은 개화 후 $18{\sim}41$일, 흑청콩은 개화 후 $55{\sim}71$일에 높았다. 4. 검정콩 잎의 생리활성 성분 함량이 높은 것으로 보아 이를 신소재 기능성 농산물로 활용 및 개발할 수 있을 것으로 사료되었다. 검정콩 잎을 신소재 기능성 농산물로 활용하기 위한 수확적기는 종실비대가 완료되는 생리적성숙기($R_7$)이었다.