• Title/Summary/Keyword: RGR

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Scientometrics Profile of Global Intellectual Property Rights Research

  • Gnanasekaran, D.;Balamurugan, S.
    • Journal of Information Science Theory and Practice
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    • v.4 no.2
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    • pp.53-65
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    • 2016
  • The authors in this paper aim to identify the growth of literature on Intellectual Property Rights (IPRs). The research publications on IPRs were downloaded from the Scopus online citation database and the authors found that there were 1,513,138 records contributed globally over a period of 10 years from 2005 to 2014. The distribution of publications based on the year, country, and document type were studied. Relative growth rate (RGR) of the publications and doubling time (Td) were calculated. Most productive organizations, source titles, and the productive authors on IPR research were studied. Most cited articles in the study area were identified. The results show that a number of publications under the subjects Medicine and Engineering were produced. The developed countries are very active in IPR research and producing publications. It is found that one institution which holds the sixth place among the top 10 most productive institutions belongs to Brazil, a developing country. Two developing countries such as China and India hold second and tenth positions respectively in the top 10 countries contributing literature on IPRs.

Impact of Nosema sp. Infection on Nutritional Physiology and Growth of the Tasar Silkworm Antheraea mylitta

  • Rath, Sudhansu Sekhar;Singh, Mrinal Kanti;Suryanarayana, N
    • International Journal of Industrial Entomology and Biomaterials
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    • v.19 no.2
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    • pp.221-228
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    • 2009
  • Nosema sp. infection in the Indian tasar silkworm, Antheraea mylitta exerts a complex of influences on its host. The instar duration was extended significantly (P<0.001) except in $1^{st}$ instar. The infected larvae took about 48 days to reach the spinning stage against 40 days in the uninfected ones. The final weight attained by the larva at the end of each instar of development declined significantly following infection, as did weight gain and relative growth rate (RGR). The growth recorded/ day declined in infected larvae compared to uninfected ones from 8.2% during $1^{st}$ instar to 43.3% during $5^{th}$ instar. Food ingestion and digestion increased with advancement of the instar significantly irrespective of the status of the larvae but the relative consumption rate (RCR) declined. These parameters significantly declined in infected larvae (except food digested during $2^{nd}$ instar). The decline was more during $3^{rd}$ instar. In contrast, the approximate digestibility (AD %) was significantly higher in infected larvae than uninfected ones leaving the $1^{st}$ instar larvae unaffected. The efficiency of conversion of ingested food (ECI) and efficiency of conversion of digested food (ECD) did not change in a patterned way following the microsporidia (Nosema sp.) infection. The values of ECI significantly changed during $2^{nd}$, $3^{rd}$ and $5^{th}$ instars; while the change in ECD during $2^{nd}$, $4^{th}$ and $5^{th}$ were significant. During the entire larval life all the parameters tends to decline significantly following microsporidia infection but AD registered a significant increase. Nosema sp. spore concentration has increased 270.7 times during larval development in the course of experimentation.

Utilization of Earthworm Cast as a Component of Plant Growth Medium for Tomato (채소용 육묘 상토로서 지렁이분립의 이용)

  • 조익환;전하준;이주삼
    • Korean Journal of Organic Agriculture
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    • v.11 no.1
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    • pp.55-66
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    • 2003
  • This study was carried out to investigate the effects of different plant growth media on the growth of tomato(Lycopersicum esculentum Mill.) seedlings during growth stages. The media were commercial plant growth medium 100%, earthworm cast (that was produced by vermicomposting of food waste and cattle manure) 100%, earthworm cast 50% + vermiculite 50%, earthworm cast 50% + perlite 50%, earthworm cast 40% + vermiculite 30% + perlite 30%. Plant length(mm), number of leaves, leaf area($\textrm{cm}^2$), stem diameter(mm), plant dry mater were greatest till the 2nd week growth stages in the commercial plant growth medium plots, but those were higher in the earthworm cast than those in the other plant growth media at the later stages of this study(P<0.05). And relative growth rate of biological yield, relative growth rate of shoot and relative growth rate of root were highest in the earthworm cast till the 4th week growth stage. Therefore it can be implied that there is the possibility of potential utilization of earthworm cast, which was produced by vermicomposting of food waste and cattle manure, as vegetable growth medium.

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Effect of Nutrient Solution for Hydroponics of Liliaceae Leaf Vegetables on the Amount of Ascorbic Acid in Chinese Chive (백합과 전용배양액이 부추의 Ascorbic acid의 함량에 미치는 영향)

  • Huang, Hua-Zi;Zhang, Cheng-Hao;Yang, Eun-Young;Lee, Sang-Gyu;Choi, Ki-Young;Yun, Hyung-Kweon
    • Journal of Bio-Environment Control
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    • v.16 no.3
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    • pp.222-227
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    • 2007
  • In this study, nutrient solution for Liliaceae (Chinese chive) leafy vegetable was developed. The various strength (1/2, 1 and 3/2) of nutrient solution recommended by National Horticultural Research Institute (NSH) was applied to the crops in deep flow technique (DFT) system for 42 days. The growth of Chinese chive were highest in the treatment of 1/2 strength. The proper constitution of nutrient solution developed for liliaceae crops (NSL) was N 12, P 2.5, K 7, Ca 4 and Mg 2 met. The crops were grown two times in March and September to examine the appropriateness of the NSC. As a result, the relative growth rate and the amount of chlorophyll (SPAD value)of Chinese chive treated with NSL were increased 1.11 times. The most important nutrient factor of ascorbic acid were also increased 1.16 times.

Effects of Temperature and Light Intensity on the Gametophyte Fragment Growth of Ecklonia cava Kjellman (Laminariales, Phaeophyta) (대형 갈조류 감태(Ecklonia cava Kjellman) 배우체 단편의 생장에 미치는 온도와 조도의 영향)

  • Kang, Jin Woo;Chung, Ik Kyo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.48 no.5
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    • pp.704-711
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    • 2015
  • We examined the effects of temperature and light intensity on gametophyte growth of Ecklonia cava Kjellman. The growth of female and male gametophytes was investigated before maturation. Gametophytes prepared from Munseom, Jeju, Korea in October 2014 were separated by sex and maintained under the following conditions: 15℃, 20 μmol·m-2·s-1, and a 12-h/12-h light/dark cycle. The experiments were conducted at five temperatures (10, 15, 20, 25, and 30℃) and three light intensities (5, 20, and 40 μmol·m-2·s-1). Daily growth rates were estimated by the increase in filamentous frond area. The optimal growth conditions for female gametophytes were 20℃ and 40 μmol·m-2·s-1; the optimal conditions for male gametophytes were 15℃ and 20 μmol·m-2·s-1. The relative growth rates (RGR) of female and male gametophytes decreased at 25℃ and 30℃, respectively. At 30℃, RGRs of gametophytes decreased by approximately 1.0% day-1. In addition, RGRs of male gametophytes were higher than those of female gametophytes. These results indicate that female gametophytes were more sensitive to temperature and light intensity than male gametophytes. Moreover, these results suggest that E. cava growth rates could decrease as a result of global warming.

Life history and growth pattern on the erigeron annuus (개망초 ( Erigeron annuus L. ) 의 生活史 및 生育特性)

  • Lee, Ho-Joon;Tae-Sung Kim
    • The Korean Journal of Ecology
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    • v.14 no.2
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    • pp.211-230
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    • 1991
  • The germinatin of e. annuus continued from the middle ofmay to mid-october. The maximum germination occurred on the mid-july. The period bloom of was distingushed amongs the different growth forms ; a orm pr of biennial and a form of pr perennial flowering from the mid-may to mid-september, and a form ps biennial blossom from the beginning of October to earlynovember. the dispersal of seed for(a form pr)occurred from early June to the mid-september. A rotte, germinating from summer to autumn, could classified into several growth forms; individuals without a critical leaf area for bolting until september and October, become a form ps of biennial, whicth did not proceed toreproductive growth unitl the next year, even thought wintering. individuals flowered on 3 years after germination become a form pr of perennial. The growth formular of aform pr of bennial, grown in a pot was w=20.2[1+$3.36{\times}10^3$(-0.062t)]$^{-1}$. The maximum relative growth rate(rgr) was 0.062g/g/day and the maximum net assimlation rate(nar) 0.089g/g/day. Therelative growth among each organ was shown as R=0.12 $T^{1.15}$between the avove-ground part(t) and the below- ground part(r). the relation between the avove-ground part(t) and the ratio of stem weight(wi) was ws/wi=2.56 $T^{0.35}$. n.p.k. was largely distributed on a leaf throughoutthe total growth period. while growing, it tended to decrease on the vegetative organ gut vice versa on the reproductive organ. however, nitrogen was more widely distributed on a leaf then in the reproductive organ.

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Photosynthetic Activity of Quercus acutissima Seedlings Grown under Artificially Acidified Soil Conditions (토양산성화 조건하에서 생육시킨 상수리나무 묘목의 광합성 활성)

  • Jin, Hyun-O;Bang, Sun-Hee;Lee, Choong-Hwa
    • Journal of Korean Society of Forest Science
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    • v.99 no.6
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    • pp.843-848
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    • 2010
  • The effects of soil acidification on the photosynthetic activity of Quercus acutissima seedlings were investigated. We measured the growth and photosynthetic activity of the seedlings in relation to soil acidification. The dry weights of the seedlings were reduced according to the amount of $H^+$ in the soil. The concentrations of Al in needles at the 90 meq $H^+$ were significantly higher than those at the control. The contents of chlorophyll in needles at 90 meq $H^+$ were significantly lower than those at the control. The net photosynthetic rates of the seedlings in the acidified soil were reduced by increasing the amount of $H^+$ to the soil. The carboxylation efficiencies(CE) of photosynthesis were reduced in the seedlings grown in the acidified soil. These results suggested that the soil acidification induced the inhibition of photochemical reactions and $CO_2$ fixation of photosynthesis.

UV-B-Induced Changes in Carbohydrate Content and Antioxidant Activity in Rice Seedling

  • Sung Jwa-Kyung;Lee Su-Yeon;Park So-Hyun;Jang Byoung-Choon;Lee Sang-Min;Lee Yong-Hwan;Choi Du-Hoi;Song Beom-Heon
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.50 no.2
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    • pp.84-90
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    • 2005
  • The effects of UV-B radiation on the seedling growth, carbohydrate metabolism and antioxidants activities of rice (Oryza sativa L.) were investigated under environmentally controlled chamber. Supplementary UV­B radiation reduced dry matter as well as leaf area, there­fore, relative growth rates (RGR) of seedlings were decreased by up to half compared to control. Photosynthetic products such as soluble sugars and starch were rapidly and significantly reduced by within 1 day of enhanced UV-B radiation due to the inhibition and degradation of photosynthetic processes and thylakoid membrane integrity. In our study, nonstructural carbohydrate levels were proved to be a main indicator on UV-B­induced stress. The behavior of SOD, CAT, APX and POD activities was monitored in the leaves of rice seedlings subjected to UV-B radiation. Under UV-B treatments, SOD activity was initially increased, whereas CAT and POD activities were slowly and slightly increased. However, APX activity showed no presumable results with an increase of UV-B dose. In leaves of rice seedlings, supplementary UV-B radiation caused an increase in free putrescine and spermidine, however spermine remained unaltered, although 24-hrs UV-B treatment slightly increased. This result presumes that an excess UV-B dose may induce ethylene biosynthesis (senescence) rather than polyamine biosynthesis (defense).

Effects of Seedling Age on Growth and Yield of Machine Transplanted Rice in Southern Plain Region

  • Kim, Sang-Su;Kim, Bo-Kyeong;Choi, Min-Gyu;Back, Nam-Hyun;Choi, Weon-Young;Lee, Sean-Yong
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.44 no.2
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    • pp.122-128
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    • 1999
  • Three rice cultivars, Namweonbyeo (early maturing), Hwaseongbyeo (medium maturing) and Dongjinbyeo (medium-late maturing) were trans-planted with 3 different seedling ages to investigate their growth habits and to improve the cultural method in paddy fields in the southern plain area of the Honam region in 1993. The 10-day old seedlings had more vigorous elongation of plant height and higher tillering ability but lower effective tiller rate, when compared with 35-day or 40-day old seedlings. Leaf area index and top dry weight were lower in 10-day old seedlings up to 40 days after transplanting but thereafter, were not different among seedlings ages. CGR was later in 10-day old seedlings, up to 30 days after transplanting, but in 30 to 40 days after transplanting, it was reversed. RGR was the highest in infant seedlings to 40 days after trans-planting, while in 50 days after transplanting, it was reversed. Panicle number and spikelet number per square meter were the highest in 40-day old seedlings, next highest in 35-day old seedlings and the lowest and in adult seedlings up to 40 days after transplanting, while spikelet number per panicle was vice versa. Milled rice yield did not vary significantly by seedling ages, but among the varieties, it was less in Hwaseongbyeo compared with Naweonbyeo and Dongjnbyeo.

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Varietal Difference and Growth Analysis of Border Effect in Rice Plant (벼 주연효과의 품종간 차이와 그 생장해석)

  • Kwang-Ho Kim
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.29 no.4
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    • pp.321-327
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    • 1984
  • Grain yield of rice plants grown in outmost first and second rows in paddy field blocked by 50 cm wide levee was averaged 30 percent more than that in center rows, but yield increased percents in border rows were significantly different between varieties. Average border effect through 3 varieties were recognized only in first and second rows from levee, but most vigorous variety, Hangangchal, showed border effect up to fourth rows from levee. Rice plants grown in border rows had more number of panicles per hill and more number of spikelets per panicle. Total dry matter weight and average leaf area of rice plants in border rows differed with those in center rows from 30 to 60 days after transplanting. Early maturing variety showed the difference between border and center rows quickly concerning to total dry matter weight and leaf area. Rice plants grown in border rows showed higher values of CGR, RGR, NAR, and LAR through the growth duration except 1 or 2 growing periods.

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