중국 징진지 지역의 LED 산업 현황 및 진출기회

김부용 ( Fu Yong Jin ),조현준 ( Hyun Jun Cho ) 한국외국어대학교 중국연구소 2012 中國硏究 Vol.54 No.-

This paper examines the LED industry of the region Jing-Jin-Ji (Beijing- Tianjin-Hebei), and comparing with other regions of mainland China. Jing-Jin-Ji takes the lead in R&D for wafers and chips, but its research outcomes have been hardly industrialized, and few companies are engaged in packaging and application. Jing-Jin-Ji`s market has not been properly formed, compared with other regions; its share of China`s whole LED industry is small, but the volume of use of LED application goods is greater than in other regions. The advancement of foreign firms into this region is poorer than in the southern region, where the LED industry is well developed. Accordingly, Jing-Jin-Ji still has more merits than the Pearl River Delta or Yangtze River Delta regions, which are already saturated, and this gives Korean LED companies the opportunity to pioneer in the market. With regard to entering into the domestic production goods market, the degree of utilization of the import markets of Beijing and Hebei is very low, so exports to these two regions should be expanded. In the application goods, the largest market in the future is expected to be the backlight market, which is anticipated to give the greatest opportunities to Korean companies. Particularly in Tianjin whose main business are focused on IT and electronics, Korea should make the most use of its superior position in the LED TV industry. In the automobile LED lighting goods, high demand will arise from the leading car manufacturers such as Beijing Hyundai Motors. And it is desirable to preferentially advance into LED lighting application model cities such as Tianjin, Baoding. With regard to strategic cooperation with local companies, recommendable are the display, wafer or backlight areas wherein Jing-Jin-Ji is strong and competitive.

Changes in Photosynthetic Characteristics during Grain Filling of a Functional Stay-Green Rice SNUSG1 and its F₁ Hybrids

Jin-Dong Fu,이변우 한국작물학회 2008 Journal of crop science and biotechnology Vol.11 No.1

Functional stay-green is a beneficial trait that may increase grain yield through the sustained photosynthetic competence during monocarpic senescence in cereal crops. The temporal changes of photosynthesis and related characteristics throughout the grain filling period of a stay-green japonica rice “SNU-SG1” was compared in growth chamber conditions with three high-yielding cultivars (HYVs) and their F₁ hybrids with SNU-SG1. SNU-SG1 exhibited a typical characteristic of functional stay-green in terms of chlorophyll degradation and photosynthetic competence during grain filling. According to the photosynthesis-light response curve measured at 10 and 35 d after heading for the flag leaf, SNU-SG1 exhibited higher initial light conversion efficiency and thus higher gross photosynthetic rate at light saturation compared to HYVs. Light saturation point was not different among genotypes, ranging from 1000 to 1500 μmol photon m-²s-¹. Net photosynthetic rate at light saturation (Pmax) of the upper four leaves in SNU-SG1 was much higher and sustained longer throughout grain-filling than HYVs and F₁ hybrids. The sustained high photosynthetic competence of SNU-SG1 during grain filling was ascribed to the longer maintenance of high mesophyll conductance that resulted from not only high chlorophyll content and its delayed degradation but also the slow degeneration of photosystem II (PS II) as judged by chlorophyll fluorescence (Fv/Fm) of flag leaves. F₁ hybrids showed slow degeneration of photosystem II similar to the male parent SNU-SG1 while chlorophyll degradation pattern close to female parents, thus exhibiting a little higher Pmax than female parents. These results suggest that SNU-SG1 has a typical functional stay-green trait that can be utilized for increasing rice yield potential through the improved dry matter production during grain filling Functional stay-green is a beneficial trait that may increase grain yield through the sustained photosynthetic competence during monocarpic senescence in cereal crops. The temporal changes of photosynthesis and related characteristics throughout the grain filling period of a stay-green japonica rice “SNU-SG1” was compared in growth chamber conditions with three high-yielding cultivars (HYVs) and their F₁ hybrids with SNU-SG1. SNU-SG1 exhibited a typical characteristic of functional stay-green in terms of chlorophyll degradation and photosynthetic competence during grain filling. According to the photosynthesis-light response curve measured at 10 and 35 d after heading for the flag leaf, SNU-SG1 exhibited higher initial light conversion efficiency and thus higher gross photosynthetic rate at light saturation compared to HYVs. Light saturation point was not different among genotypes, ranging from 1000 to 1500 μmol photon m-²s-¹. Net photosynthetic rate at light saturation (Pmax) of the upper four leaves in SNU-SG1 was much higher and sustained longer throughout grain-filling than HYVs and F₁ hybrids. The sustained high photosynthetic competence of SNU-SG1 during grain filling was ascribed to the longer maintenance of high mesophyll conductance that resulted from not only high chlorophyll content and its delayed degradation but also the slow degeneration of photosystem II (PS II) as judged by chlorophyll fluorescence (Fv/Fm) of flag leaves. F₁ hybrids showed slow degeneration of photosystem II similar to the male parent SNU-SG1 while chlorophyll degradation pattern close to female parents, thus exhibiting a little higher Pmax than female parents. These results suggest that SNU-SG1 has a typical functional stay-green trait that can be utilized for increasing rice yield potential through the improved dry matter production during grain filling

Barriers to and Benefits of Interuniversity Collaboration

( Fu Jin Shih ),( RN DNSc ) 서울대학교 간호과학연구소 2007 간호학의 지평 Vol.4 No.1

Preparation of Si3N4 powder by combustion synthesis

Jin-fu Li,Kang Li,Guo-bin Li,Dong-ming Yan 한양대학교 세라믹연구소 2009 Journal of Ceramic Processing Research Vol.10 No.3

The present paper addresses a possible route for the manufacturing of silicon nitride (Si3N4) powder under rather a low pressure of nitrogen using a combustion synthesis (CS) method. Reactant mixtures were diluted by 30-50 wt% of Si3N4 to avoid the melting of silicon during combustion. Si3N4 powders with α/(α + β) ratios were prepared in a loose powder mixture state in the temperature range of 1500-2200 oC with dwell times from 10 to 60 minutes. The influence of the amount of ammonium fluoride (NH4F) in the mixture with silicon, the silicon particle size distribution, and the nitrogen pressure on the extent of silicon conversion into silicon nitride was experimentally studied. It was revealed that a small ammonium fluoride addition to silicon powder allowed the production of silicon nitride powder with a good output for industrialization. Because of the existence of the NH4F, the reaction involves not only the silicon nitriding mechanism, the growth of α-Si3N4 occurred partially by a vapor-crystal growth mechanism, and a vapor-liquid-solid (VLS) mechanism works during the rod-like β-Si3N4 growth. The as-synthesized samples were characterized using X-ray diffraction and scanning electron microscopy analyses. Possible mechanisms of CS Si3N4 particle growth are discussed. CS technology has the advantage over traditional technology in simple equipments, low cost, high quality and relative good sintering activity. The present paper addresses a possible route for the manufacturing of silicon nitride (Si3N4) powder under rather a low pressure of nitrogen using a combustion synthesis (CS) method. Reactant mixtures were diluted by 30-50 wt% of Si3N4 to avoid the melting of silicon during combustion. Si3N4 powders with α/(α + β) ratios were prepared in a loose powder mixture state in the temperature range of 1500-2200 oC with dwell times from 10 to 60 minutes. The influence of the amount of ammonium fluoride (NH4F) in the mixture with silicon, the silicon particle size distribution, and the nitrogen pressure on the extent of silicon conversion into silicon nitride was experimentally studied. It was revealed that a small ammonium fluoride addition to silicon powder allowed the production of silicon nitride powder with a good output for industrialization. Because of the existence of the NH4F, the reaction involves not only the silicon nitriding mechanism, the growth of α-Si3N4 occurred partially by a vapor-crystal growth mechanism, and a vapor-liquid-solid (VLS) mechanism works during the rod-like β-Si3N4 growth. The as-synthesized samples were characterized using X-ray diffraction and scanning electron microscopy analyses. Possible mechanisms of CS Si3N4 particle growth are discussed. CS technology has the advantage over traditional technology in simple equipments, low cost, high quality and relative good sintering activity.

Rapid Prediction of Amylose Content of Polished Rice by Fourier Transform Near-Infrared Spectroscopy

Jin-Cheol Lee,Yeon-Hee Yoon,Sun-Min Kim,Byong-Sik Pyo,Fu-hung Hsieh,Hak-Jin Kim,Jong-Bang Eun 한국식품과학회 2007 Food Science and Biotechnology Vol.16 No.3

Fourier transform near-infrared (FT-NIR) spectroscopy and partial least squares (PLS) regression were used to predict the amylose content of polished rice. Spectral reflectance data in a wavelength range of 1,000 to 2,500 nm were obtained with a commercial spectrophotometer for 60 different varieties of Korean rice. For a comparison of this spectroscopic method to a standard chemical analysis, the amylose contents of the tested rice samples were determined by the iodine-blue colorimetric method. The hughest correlation for the amylose (R2=0.94, standard error of prediction=0.20% amylose content) was obtained when using the FT_NIR spectrum data pre-treated with normalization, the first derivative, smoothing, and scattering correction.

Physiological Characteristics of a Functional Stay-Green Rice "SNU-SG1" during Grain-Filling Period

Fu, Jin-Dong,Yan, Yong-Feng,Lee, Byun-Woo 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.1

Functional stay-green has been regarded as a promising characteristic to be introduced for improving rice yield potential. A functional stay-green rice "SNU-SG1" that was identified from japonica rice collections was compared with two regular high-yielding rice cultivars (HYVs) for the temporal change of leaf chlorophyll, soluble protein, and root activity, and nitrogen accumulation and remobilization during the grain-filling period. SNU-SG1 had slower decreasing rate and maintained higher concentration of chlorophyll and soluble protein in upper four leaves during the grain-filling period than HYVs "Suweon490" and "Andabyeo", revealing a typical stay-green characteristic. Even though SNU-SG1 remobilized almost the same proportion of N accumulated before heading as HYVs to grain, it maintained much higher leaf N concentration due to the significantly higher N accumulation that is ascribable to the higher root activity sustenance during grain-filling period. The functional stay-green trait of SNU-SG1seems to stem not only from the genetic control preventing chlorophyll degradation but also from the higher capacity to absorb N from soil due to the sustained strong root activity during grain-filling period. SNU-SG1 exhibited higher crop growth rate during late grain-filling period than HYVs, resulting in higher grain-filling percentage and non-structural carbohydrate re-accumulation in the stem at the final stage of grain filling. It is concluded that SNU-SG1 has a promising trait "functional stay-green" contributable to rice yield potential improvement through the improved grain filling.

Role of miR-511 in the Regulation of OATP1B1 Expression by Free Fatty Acid

( Jin Fu Peng ),( Li Liu ),( Cheng Xian Guo ),( Shi Kun Liu ),( Xiao Ping Chen ),( Li Hua Huang ),( Hong Xiang ),( Zhi Jun Huang ),( Hong Yuan ),( Guo Ping Yang ) 한국응용약물학회 2015 Biomolecules & Therapeutics(구 응용약물학회지) Vol.23 No.5

MicroRNAs (miRNAs) are a family of non-coding RNA that are able to adjust the expression of many proteins, including ATPbinding cassette transporter and organic cation transporter. We sought to evaluate the effect of miR-511 on the regulation of OATP1B1 expression by free fatty acids. When using free fatty acids to stimulate Chang liver cells, we found that the expression of miR-511 increased significantly while the expression of OATP1B1 decreased. We also proved that SLCO1B1 is the target gene of miR-511 with a bioinformatics analysis and using the dual luciferase reporter assay. Furthermore, the expressions of SLCO1B1 and OATP1B1 decreased if transfecting Chang liver cells with miR-511, but did not increase when transfecting the inhibitors of miR-511 into steatosis cells. Our study indicates that miR-511 may play an important role in the regulation of OATP1B1 expression by free fatty acids.

Changes in Photosynthetic Characteristics during Grain Filling of a Functional Stay-Green Rice SNUSG1 and its $F_1$ Hybrids

Fu, Jin-Dong,Lee, Byun-Woo The Korean Society of Crop Science 2008 Journal of crop science and biotechnology Vol.11 No.1

Functional stay-green is a beneficial trait that may increase grain yield through the sustained photosynthetic competence during monocarpic senescence in cereal crops. The temporal changes of photosynthesis and related characteristics throughout the grain filling period of a stay-green japonica rice "SNU-SG1" was compared in growth chamber conditions with three high-yielding cultivars(HYVs) and their $F_1$ hybrids with SNU-SG1. SNU-SG1 exhibited a typical characteristic of functional stay-green in terms of chlorophyll degradation and photosynthetic competence during grain filling. According to the photosynthesis-light response curve measured at 10 and 35 d after heading for the flag leaf, SNU-SG1 exhibited higher initial light conversion efficiency and thus higher gross photosynthetic rate at light saturation compared to HYVs. Light saturation point was not different among genotypes, ranging from 1000 to 1500 ${\mu}mol$ photon $m^{-2}s^{-1}$. Net photosynthetic rate at light saturation($P_{max}$) of the upper four leaves in SNU-SG1 was much higher and sustained longer throughout grain-filling than HYVs and $F_1$ hybrids. The sustained high photosynthetic competence of SNU-SG1 during grain filling was ascribed to the longer maintenance of high mesophyll conductance that resulted from not only high chlorophyll content and its delayed degradation but also the slow degeneration of photosystem II(PS II) as judged by chlorophyll fluorescence($F_v/F_m$) of flag leaves. $F_1$ hybrids showed slow degeneration of photosystem II similar to the male parent SNU-SG1 while chlorophyll degradation pattern close to female parents, thus exhibiting a little higher $P_{max}$ than female parents. These results suggest that SNU-SG1 has a typical functional stay-green trait that can be utilized for increasing rice yield potential through the improved dry matter production during grain filling.

Physiological Characteristics of a Functional Stay-Green Rice “SNU-SG1” During Grain-Filling Period

Jin-Dong Fu,Yong-Feng Yan,이변우 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.1

Functional stay-green has been regarded as a promising characteristic to be introduced for improving rice yield potential. A functional stay-green rice “SNU-SG1” that was identified from japonica rice collections was compared with two regular high-yielding rice cultivars (HYVs) for the temporal change of leaf chlorophyll, soluble protein, and root activity, and nitrogen accumulation and remobilization during the grain-filling period. SNU-SG1 had slower decreasing rate and maintained higher concentration of chlorophyll and soluble protein in upper four leaves during the grain-filling period than HYVs “Suweon490” and “Andabyeo”, revealing a typical stay-green characteristic. Even though SNU-SG1 remobilized almost the same proportion of N accumulated before heading as HYVs to grain, it maintained much higher leaf N concentration due to the significantly higher N accumulation that is ascribable to the higher root activity sustenance during grain-filling period. The functional stay-green trait of SNU-SG1 seems to stem not only from the genetic control preventing chlorophyll degradation but also from the higher capacity to absorb N from soil due to the sustained strong root activity during grain-filling period. SNU-SG1 exhibited higher crop growth rate during late grain-filling period than HYVs, resulting in higher grain-filling percentage and non-structural carbohydrate re-accumulation in the stem at the final stage of grain filling. It is concluded that SNU-SG1 has a promising trait “functional stay-green” contributable to rice yield potential improvement through the improved grain filling.

벼의 Rapid Canopy Closure와 생육 및 수량과의 관계

Fu Jin-dong,이변우 한국작물학회 2004 한국작물학회 학술발표대회 논문집 Vol.2004 No.-