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REMARKS ON FIXED POINT THEOREMS
Jiang, Guo-Jing,Kang, Shin-Min The Youngnam Mathematical Society Korea 2000 East Asian mathematical journal Vol.16 No.2
In this paper we show fixed point theorems related with the diameter of orbit on metric spaces. The results presented in this paper extend, improve and unify the results of $Heged\"{u}s$ [1], Kim, Kim, Leem and Ume [2], Kim and Leem [3], Ohta and Nikaido [4] and $Taskovi\'{c}$ [5].
Anti-toxoplasmosis Effects of Oleuropein Isolated from <i>Fraxinus rhychophylla</i>
Jiang, Jing-Hua,Jin, Chun-Mei,Kim, Youn-Chul,Kim, Hun-Soo,Park, Won-Cheol,Park, Hyun Pharmaceutical Society of Japan 2008 Biological & pharmaceutical bulletin Vol.31 No.12
<P>Toxoplasmosis is a parasitic disease caused by <I>Toxoplasma gondii</I>, with very few therapeutic treatment options. Typically, the choices for treatment are pyrimethamine and sulfadiazine, however their utility is limited because of drug toxicity and serious side effects. For these reasons, new drugs with lower toxicity are urgently needed. In this study, the compound oleuropein isolated from <I>Fraxinus rhynchophylla</I> showed anti-<I>T. gondii</I> effects <I>in vitro</I> and <I>in vivo</I>. In Madin–Darby bovine kidney cells, the selectivity of oleuropein was 8.9, which was higher than sulfadiazine and pyrimethamine (3.8 and 2.5, respectively). In infected mice, the inhibition ratio of <I>T. gondii</I> in the peritoneal cavity was 55.4% compared to the negative control group after treatment with 300 mg/kg oleuropein. In addition, inhibitory effects on granuloma, apoptosis, necrosis and cyst-formation were shown in sections of spleen and liver. Oleuropein is therefore a potentially useful anti-<I>T. gondii</I> candidate for clinical application.</P>
Jiang Wan-Zhu,Yao Fang-Jie,Lu Li-Xin,Fang Ming,Wang Peng,Zhang You-Min,Meng Jing-Jing,Lu Jia,Ma Xiao-Xu,He Qi,Shao Kai-Sheng 한국미생물학회 2021 The journal of microbiology Vol.59 No.1
Gloeostereum incarnatum is an edible medicinal mushroom widely grown in China. Using the whole genome of G. incarnatum, simple sequence repeat (SSR) markers were developed and synthetic primers were designed to construct its first genetic linkage map. The 1,048.6 cm map is composed of 10 linkage groups and contains 183 SSR markers. In total, 112 genome assembly sequences were anchored, representing 16.43 Mb and covering 46.41% of the genome. Selfing populations were used for quantitative trait loci (QTL) targeting, and the composite interval mapping method was used to co-localize the mycelium growth rate (potato dextrose agar and sawdust), growth period, yield and fruiting body length, and width and thickness. The 14 QTLs of agronomic traits had LOD values of 3.20–6.51 and contribution rates of 2.22– 13.18%. No linkage relationship was found between the mycelium growth rate and the growth period, but a linkage relationship was observed among the length, width and thickness of the fruiting bodies. Using NCBI’s BLAST alignment, the genomic sequences corresponding to the QTL regions were compared, and a TPR-like protein candidate gene was selected. Using whole-genome data, 138 candidate genes were found in four sequence fragments of two SSR markers located in the same scaffold. The genetic map and QTLs established in this study will aid in developing selective markers for agronomic traits and identifying corresponding genes, thereby providing a scientific basis for the further gene mapping of quantitative traits and the marker-assisted selection of functional genes in G. incarnatum breeding programs.
Antimalarial Effects of Areca catechu L.
Jiang, Jing-Hua,Jung, Suk-Yul,Kim, Youn-Chul,Shin, Sae-Ron,Yu, Seung-Taek,Park, Hyun The Physiological Society of Korean Medicine and T 2009 동의생리병리학회지 Vol.23 No.2
The emergence and spread of drug-resistant malaria parasites is a serious public health problem in the tropical world. Useful antimalarial drugs such as chloroquine have resistance in the world now. Moreover, other antimalarialdrugs such as mefloquine, halofantrine, atovaquone, proguanil, artemether and lumefantrine retain efficacy but have limitations, one of which is their high cost. New antimalarial drugs are clearly needed now. Cytotoxicity assay and susceptibility assay were performed for the selectivity of herb extracts in vitro. On the basis of high selectivity, 4-day suppressive test and survival test were progressed in Plasmodium berghei-infected mice. The selectivity of Areca catechu L. (ACL) and butanol extract of ACL (ACL-BuOH extract) were 3.4 and 3.0 in vitro, respectively. Moreover in vivo, 4-day suppressive test showed 39.1 % inhibition effect after treated with 150 mg/kg/day ACL-BuOH to P. berghei-infected mice. Survival test also showed 60% survival rate with ACL-BuOH-treated group while all other group mice died. In this study, ACL and ACL-BuOH were investigated for antimalarial activity in vitro and in vivo and they showed a potent antimalarial activity. In particular,ACL-BuOH could specifically lead higher survival rate of mice in vivo. Therefore ACL-BuOH would be a candidate of antimalarial drugs.
Jiang, Guo-Jing,Kim, Jong-Kyu 한국전산응용수학회 2001 The Korean journal of computational & applied math Vol.8 No.3
In this paper we obtain the necessary and sufficient conditions for convergence concerning the Mann iterative sequences with errors for the class of continuous accretive operators in smooth Banach spaces. AMS Mathematics Subject Classification : 47H05, 47H06, 47H14
An empirical study on the determinants of air trade – The case of South Korea and Chinese provinces
Jiang Xiu Jing,Oh Yong Sik 한국해운물류학회 2023 The Asian journal of shipping and Logistics Vol.39 No.4
The air transportation industry is becoming an increasingly important growth factor for economic development as trade and logistics exchanges between South Korea and China continue to grow. The main objective of this article is to examine the factors that influence air trade between South Korea and 31 Chinese provinces from 2010 to 2019, with the aim of promoting the expansion of air trade between the two countries. The findings suggest that, with the exception of South Korea’s exports to the 31 Chinese provinces, the gross regional domestic product has a significantly positive effect. The effects of distance and personal income on total air trade, air imports and exports are notably negative and positive respectively. Furthermore, foreign direct investment has a positive impact only when South Korea exports to China. The study concludes that, enhancing the volume of air traffic between South Korea and China can be accomplished by directing investments towards inland areas that possess trade-potential, expanding airport infrastructure, and developing regional economic growth. Furthermore, it is suggested that emerging domestic markets should be under close observation due to the changes in the trade structure after the COVID 19.
METRIC COMPLETENESS AND ORDER COMPLETENESS
Jiang, Guo-Jing,Kim, Ki-Hong The Youngnam Mathematical Society Korea 2000 East Asian mathematical journal Vol.16 No.2
We give nine necessary and sufficient conditions for a metric space to be complete.