• Title/Summary/Keyword: growing activity

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Symbiotic Nitrogen Fixation Activity and Environmental Factors of Robinia Pseudo-acacia L. (아까시나무 ( Robinia pseudo - acacia L. ) 의 공생적 질소고정 활성과 환경요인)

  • Hong, Sung-Jin;Song, Seung-Del
    • The Korean Journal of Ecology
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    • v.13 no.2
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    • pp.93-100
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    • 1990
  • The activity of symbiotic -fixation and environmental factors of Robinia pseudo-acacia L., bearing root nodules, were quantitatively analyzed during the growing period. Among changes of total nitrogen and phosphorus contents of each organ, leaves showed prominent decreases from the highest quantity of the early growing period to the lowest of the late period. The rhizosphere showed acidic pH and low level of nitrogen, phosphorus and organic matter contents during the growing period. -fixation activity of nodules initiated from April and showed the maximum value of 190 $\mu$/g DW/hr in late June and than decreased to 50$\mu$M/g DW/hr during the rainy and dry season. Another peak of the activity attained 246$\mu$M/g DW/hr in the late growing stage of September. The maximum value of nitrogen fixation activity was observed at the conditions of pH7, $25\{\circ}C$ of temperature and 20 Kpa of oxygen partial pressure.

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A study on the understanding of growing of child and activity of bringing up in father - by comparing mother's - (아버지의 아동발달의 이해 및 양육행동에 관한 연구 -어머니와의 비교를 통하여-)

  • Hyun, Jung-Hwan
    • Journal of Fisheries and Marine Sciences Education
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    • v.16 no.2
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    • pp.171-180
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    • 2004
  • The purpose of the present study is to study how the understanding of growing of child to be related with recognizing the role of parents and activity of bringing up, and at the same time verifying a part of father through reviewing difference view with mother's. Object of investigation were 396 members of parents who have babies in infancy (177 members of fathers and 219 members of mothers. ). The result of this research shows that father has stronger confidence than mother in the role of parents relatively, but he does not understand as much as mother does in growing of child, and is not active enough in bringing up, keeps less intimate relationship with his child and does not affect on his child than mother does. And father who has more understanding on growing of child has also more positive activity in bringing up child. We can get one conclusion from this research, now a days it is seriously required for a father to participate more corporately in bringing up his child, we should do support more effort to let father gets better and right understanding in growing of child and building-up more effective and positive relation with his child.

Effects of Food Components on the Antibacterial Activity of Chitosan against Escherichia coli

  • Hong, Yi Fan;Moon, Eun-Pyo;Park, Yun-Hee
    • Food Science and Biotechnology
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    • v.17 no.6
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    • pp.1365-1367
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    • 2008
  • The antibacterial activity of chitosan against Escherichia coli was investigated in the presence of NaCl, sucrose, and ethanol to assess the potential use of chitosan as a biopreservative in food products containing these components. The inhibitory activity of chitosan decreased slightly upon the addition of NaCl and sucrose, respectively to culture broth containing 100 ppm of chitosan (Mw 3,000), while the addition of ethanol enhanced the inhibitory activity of chitosan on growing cells. The addition of these components to non-growing cells prior to chitosan treatment demonstrated that NaCl protected the cells from the inhibitory activity of chitosan, while sucrose had no effect. Ethanol addition to non-growing cells increased cell death by chitosan treatment. Finally, binding of fluorescein isothiocyanate (FITC)-labeled chitosan to E. coli was measured in the presence of the food components. The FITC-labeled chitosan binding to cells decreased upon NaCl addition, was not affected by sucrose, and increased following treatment with ethanol.

Antioxidant activity of ginseng cultivated under mountainous forest with different growing years

  • Pan, Hong-Yan;Qu, Yang;Zhang, Jian-Kui;Kang, Ting-Guo;Dou, De-Qiang
    • Journal of Ginseng Research
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    • v.37 no.3
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    • pp.355-360
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    • 2013
  • Ginseng cultivated and grown naturally under mountainous forest is formally called "Lin-Xia-Shan-Shen" (LXSS) and grown in manual condition is called garden ginseng (GG) according to Chinese pharmacopoeia (2010 edition). Usually the growing condition of LXSS is similar to wild ginseng and mostly used in Chinese folks in ancient times. The antioxidant properties of LXSS with different growing years were evaluated by their inhibitions of thiobarbituric acid-reactive substance (TBA-RS) formation in liver homogenate and 2, 2-diphenyl-1-picrylhydrazyl (DPPH)-radical scavenging activity comparing with those of GG. The inhibitions of different polar extracts (n-butanol and water) of LXSS and GG on TBA-RS formation were also evaluated. The results showed that the antioxidant effects of LXSS were higher than those of GG and the TBA-RS formation inhibition of LXSS with longer growing years were stronger than those with shorter growing years, while the DPPH-radical scavenging activity of LXSS did not show significant difference with the change of the growing year. The results indicated that the inhibitory effect of TBA-RS formation and the DPPH-radical scavenging of LXSS were correlated with the contents of ginsenosides. In adddition, the starch contents of LXSS and GG were determined by micro-amount method with spectrophotometer. It showed that the starch content in GG was higher than that of LXSS whose starch decreased gradually with the growing year.

Studies on the Cleavage Inhibidng Activity in the Cytoplasm of Growing Follicular Oocytes in Mammals (성장중인 포유동물 여포난자 세포질의 난할억제효과에 관하여)

  • 이원교;권혁방
    • The Korean Journal of Zoology
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    • v.33 no.1
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    • pp.45-52
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    • 1990
  • In order to determine whether maturation inhibiting activity(MIA) in the cytoplasm of growing follicular oocytes would suppress the cleavage of the embryonal cells, the growing oocytes were fused with the 2 or 4 cell blastomeres and then examined for the nuclear phase of the fused giant cells 24 hr after culture. A significant number of the giant cells(60%) composed of growing mouse oocyte and 2 cell mouse blastomere(1/2) in interphase has contained 2 nuclei 24 hr after culture and most of the giant cells (90%) composed of the growing oocyte and 4 cell blastomere(1/4) also contained 2 nuclei after culture. The unfused blastomeres or the isolated blastomeres cultured without fusion treatment cleaved one cell cycle under the same culture condition. In contrast, the nucleus of the growing oocytes was disintegrated and the chromosome condensed when fused with 2 cell blastomere in mitosis. The growing rat oocytes also suppressed the nuclear disintegration of the mouse embryonal cells during culture. The data presented here showed that MIA in the growing mammalian oocyte inhibited the cleavage of the embryonal cells in interphase stage, but not in milosis stage.

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성장중인 생쥐와 돼지난자의 성숙억제요인에 관하여

  • 이원교;권혁방
    • The Korean Journal of Zoology
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    • v.31 no.4
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    • pp.265-272
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    • 1988
  • 세포융합방법을 사용하여 성장증인 포유동물의 난자에 들어있는 성숙억제요인(maturation inhibiting activity, 1연Al에 대해 조사하였다. 성장중인 생쥐난자와 성장한 미성숙난자를 1:1로 융합하여 배양했을 서 (14-17시간)에는 거의 모두 핵붕괴를 일으키었으나(90oyo), 2:1로 융합했을 때는 대부분(약 64%) 3개의 핵을 모두 간직하고 있었다. 돼지난자의 경우는 성장중인 것깎 성장한 것을 1:1로 융합하여 배양했을 때에도 융합체들은 모두 핵을 간직하고 있었으며 돼지의 성장중인 난자와 생쥐의 성장한 난자를 융합했을 때에도 모두 핵을 보존하고 있었다. 이에 반하여 돼지와 생쥐 모두에서 성장한 난자끼리 융합했을 때에는 예외없이 핵붕괴가 일어났다. 이러한 결과는 성장중인 생쥐나 돼지의 난자에 각IA가 존재한다는 열과 이종간에도 효과가 있다는 것을 보여주고 있다. 또한 이는 MIA와 성숙촉진요인(maturation promoting factor, MPH의 상대적인 양의 변화가 난자의 성숙조절에 증요한 9f할을 한다는 것을 시사해주고 있다.In an attempt to elucidate the nature of maturation inhibiting activity (MIA) in growing mamma-lian oocvtes, growing mouse and pig oocytes incompetent to resume meiosis were fused with fully grown immature oocvtes in various combinations and cultured for 14-17 hours. In slant cells composed of two mouse growing ooh임es and one large immature oocyte (2:기, their GVs remained well conserved (about 64%) after culture, but not in the ceils composed of one by one pairs. In giant cells of pig composed of one growing and onto large immature oocytes, both GVs remained conserved. In the cells composed of one pig growing and one mouse large oocytes, both GVs were also conserved. In contrast to this, pairs of large mouse oocvtes or those of large pig oocvtes had no CVs after culture. Thus, we could acertain the existEnce of MIA and none-pecificty of it in the mouse and pig growing oocvtes. The results also suggest that the relative amount of substances showlns MfA or MPF activity may be important in the regulation of oocyte amount of substances showing MIA or MPF activity may be important in the regulation of oocyte maturation.

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Recalculation of Forest Growing Stock for National Greenhouse Gas Inventory (국가 온실가스 통계 산정을 위한 임목축적 재계산)

  • Lee, Sun Jeoung;Yim, Jong-Su;Son, Yeong Mo;Kim, Raehyun
    • Journal of Climate Change Research
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    • v.7 no.4
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    • pp.485-492
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    • 2016
  • For reporting national greenhouse gas inventory in forest sector, the forest growing stock from the National Forest Inventory (NFI) system has used as activity data sources. The National Forest Inventory system was changed from rotation system by province to annual system by 5 years across the country. The forest growing stocks based on the new inventory system produced a different trend compared to the previous estimations. This study was implemented to recalculate previous forest growing stocks for time series consistency at a national level. The recalculation of forest growing stock was conducted in an overlap approach by the IPCC guideline. In order to support the more consistency data, we used calibration factors between applied stand volumes in 1985 and 2012, respectively. As a result, the time series of recalculated forest growing stock was to be consistency using the overlap approach and the calibration factor with the lower middle/middle site index. According to the applied overlap period, however, we will recalculate activity data using more complete data from national forest inventory system.

Studies on the effects of radiation from radioisotopes incorporated into plants (Ⅶ) Effects of internally administered P-32 on the growth of soybeans (작물에 흡수된 방사성 동위원소의 내부조사효과에 관한 연구(제7보) 대두의 생장에 미치는 P-32의 영향)

  • 김길환
    • Journal of Plant Biology
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    • v.12 no.3
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    • pp.15-25
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    • 1969
  • To investigate the radiation effect of P-32 on the soybean plants, the seeds treated with various levels of P-32 solution were sown and cultured in the pots. The growth of the plants and the contents of the macroelements were observed and the following results were obtained. 1) The linear growth of the plants at the early stage seemed to have been promoted by the low-level P-32 treatemnt. At the later growing stage, however, this difference among treatments were less conspicuous. 2) The plants of high level P-32 application showed some growth damaging symptom at the early growing stage. Later this damage was recorded as the time went on and these plants showed even better growth than the control. As a result at the late growing stage, they ensued highest growth. 3) The plants showed in general more growth at the low activity level than at the high-level at the early growing stage. At the late stage, however, the high-level activity promoted more growth than the low-level. 4) At the early growing stage P-32 treatment produced in general significantly more lower than control. At the later stage, however, this difference was not clearly seen. 5) The P-32 treatment seemed to have stimulated earlier florescence and this tendency was more clearly observable eapecially at the high activity level. 6) The weight of the air-dried seeds tended to be increased through P-32 treatment by 10-45%. This tendency was clearly observed especially at the low-level activity. 7) As for the contents of the various macroelements in the leaves, the nitrogen showed significantly larger contents at the middle level(S1) P-32 treatments. The phosphorous contents showed also highest at the middle levels activity and lower both at the high and low-activity levels. The potassium contents was proved, on the contrary, higher at the low-level activity and lower at the high-level. 8) The nitrogen contents in the stems was found significantly higher than control, except at the low-activity level. The phosphorous showed higher contents at the low-activity level and no significant difference at the high-activity level. As for the contents of potassium, calcium and magnesium, three seemed no significant difference among treatments. However, the magnesium showed somewhat higher content at the low-activity level, whereas the calcium was proved high than control. 9) The inorganic contents in the root showed that N and P in the P-32 treated plant were significantly higher than the control and the K-contents was, on the contrary, significantly higher at the control than the rest of the treatments. As for the calcium and magnesium there showed no difference among all treatments.

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Effects of Different Growing Regions on Quality Characteristics, Bioactive Compound Contents, and Antioxidant Activity of Aronia (Aronia melanocarpa) in Korea

  • Hwang, Eun-Sun;Thi, Nhuan Do
    • Preventive Nutrition and Food Science
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    • v.21 no.3
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    • pp.255-262
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    • 2016
  • The objective of this study was to determine the effects of different growing regions on quality characteristics, total bioactive compound contents, and in vitro antioxidant activity in aronia. Aronia grown in 3 different regions (Sangjoo, Ulju, and Youngcheon) in Korea was obtained and used fresh or as a freeze-dried powder. No statistically significant differences were observed for moisture, ash, crude lipid, and crude protein contents in aronia sampled from the 3 different regions. Aronia grown in Sangjoo had the highest total acid content and the lowest sugar content and pH value. Conversely, aronia grown in Youngcheon possessed the lowest total acid content and the highest sugar content and pH value. Aronia grown in Sangjoo possessed relatively high levels of polyphenols, flavonoids, and anthocyanins, as well as high antioxidant activity in comparison with aronia produced in other regions. Aronia grown in Youngcheon scored the highest for taste and overall acceptability in sensory evaluations, which may be related to the high sugar content and pH, and the low total acidity of the fruits. It is possible that higher sugar contents and pH, and lower total acidity in the aronia grown in Youngcheon result in more preferable sensory characteristics. However, they also contain relatively low levels of total polyphenols, flavonoids, and anthocyanins, and have low antioxidant activity as measured by 2,2-diphenyl-1-picrylhydrazyl and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging assays.

Neurospora의 생육시기에 따른 호흡능의 변화와 자외선 감수성과의 상관관계

  • 이영녹
    • Journal of Plant Biology
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    • v.6 no.4
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    • pp.1-4
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    • 1963
  • Using conidia of Neurospora, changes in respiratory activities and the sensitivity to the ultraviolet light of the cells at different growing stages were measured by manometric methods, and the correlation between them was observed. Efficiency in the utilization of various carbon sources, such as, glucose, sucrose, maltose, starch and sodium acetate, in growth and exogenous respiration of N. crassa was also determined. Growth rate of N. crassa was decreased considerably in the medium containing sodium acetate than in the glucose medium and was almost zero in the lactose medium, whereas the utilization of sucrose, maltose and starch was ve교 high, as that of glucose. Respiratory activities of the cells veried considerably depending upon their different growing stages. Actively growing hyphae exhibited the greatest activity in exogenous glucose respiration, followed by germinating and activated conidia in decreasing order. There was no proportional relationship between the dose of ultraviolet light irradiated and its effect on the respiratory activity of the cells, though the more the dose of ultraviolet light, the more the injury. The sensitivity of the cells to ultraviolet light varied with the different respiratory activities of the cells linked to the developmental stages. In general, the more actively growing cells having high respiratory activities exhibited the more serious injury.

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