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Bioaccumulation of Arsenic in Recombinant Escherichia coli Expressing Human Metallothionein
Yu-Jie Su,Jian-Qun Lin,Jian-Qiang Lin,Dong-Hui Hao 한국생물공학회 2009 Biotechnology and Bioprocess Engineering Vol.14 No.5
The recombinant Escherichia coli(E.coli) expressing human hepatic metallothionein_IA (hMT_IA) was constructed for bioaccumulation of Arsenic (As). The gene sequence of hMT_IA was modified for codon preference of E.coli and synthesized using chemical method. The vector of pGEX_4T_1 was used=and hMT_IA was expressed as the fusion protein with glutathione S-transferase (GST) tag. The bioaccumulation capability of arsenite compounds As(III) of the recombinant E.coli increased more than 3-fold from 76.3 to 319.6 μg/g dry cells compared with the control. The conditions of 50 μM of As(III) and low pHs were optimal for As(III) bioaccumulation. The heavy metals of Cd, Hg, and Zn inhibited As(III) bioaccumulation. The bioaccumulation reached 70% of the saturated value within 1 h. The recombinant E.coli will be useful in bioremediation of arsenic or other kinds of heavy metal contaminated water. The recombinant Escherichia coli(E.coli) expressing human hepatic metallothionein_IA (hMT_IA) was constructed for bioaccumulation of Arsenic (As). The gene sequence of hMT_IA was modified for codon preference of E.coli and synthesized using chemical method. The vector of pGEX_4T_1 was used=and hMT_IA was expressed as the fusion protein with glutathione S-transferase (GST) tag. The bioaccumulation capability of arsenite compounds As(III) of the recombinant E.coli increased more than 3-fold from 76.3 to 319.6 μg/g dry cells compared with the control. The conditions of 50 μM of As(III) and low pHs were optimal for As(III) bioaccumulation. The heavy metals of Cd, Hg, and Zn inhibited As(III) bioaccumulation. The bioaccumulation reached 70% of the saturated value within 1 h. The recombinant E.coli will be useful in bioremediation of arsenic or other kinds of heavy metal contaminated water.
임수지 ( Su-jie Im ),임지수 ( Ji-su Lim ),최유진 ( Yu-jin Choi ),임순범 ( Soon-bum Lim ) 한국정보처리학회 2015 한국정보처리학회 학술대회논문집 Vol.22 No.1
마인드맵은 브레인스토밍을 할 수 있는 효과적인 도구이다. 본 연구에서는 기존의 마인드맵 서비스가 공동 작업에 한계가 있음을 인지하고, 공동 작업을 지원하는 마인드맵 서비스를 개발하는 것을 목표로 하였다. 해당 연구에서는 프로젝트 구성원이 개별적으로 마인드맵을 편집 및 작성하고, 마인드맵을 통합하며, 마인드맵 편집 과정을 실시간으로 공유할 수 있는 기능을 개발하였다. 본 시스템은 HTML 과 JavaScript로 개발되었다.
Investment Climate Analysis of China and South Korea: Based on Grading Method
Jing LI(Jing LI),Xin Yu XU(Xin Yu XU),Jie XU(Jie XU),Shuai SU(Shuai SU),Fan ZHANG(Fan ZHANG) 한국4차산업학회 2022 4차산업연구 Vol.2 No.2
Purpose - This study analyzes the investment environment of South Korea by using the rating scale of Robert B Stobaugh, Jr, and draws conclusion implication. Research design, data, and methodology - The study conducted a survey on according to the political stability, capital repatriation, foreign ownership allowed, discrimination and controls, foreign vs domestic businesses, currency stability, willingness to grant tariff protection, availability of local capital, and annual inflation for last 5 years. The score of these eight aspects will be given based on the current situation in South Korea and the sum of the scores will be calculated. Result - China-Korea economic and trade relations are in a stage of transformation and upgrading, and the level of economic and trade cooperation in various fields is reaching a new level. It is hoped that Chinese enterprises will grasp business opportunities, strengthen research and analysis of the Korea market and achieve mutually beneficial cooperation. Conclusion - The investment environment of South Korea is superior according to the political stability, capital repatriation, foreign ownership allowed, discrimination and controls, foreign vs domestic businesses, currency stability, willingness to grant tariff protection, availability of local capital, and annual inflation for last 5 years.
Yu Tianyu,Jiang Yunlei,Liang Suxia,Zhao Zhiguo,Zou Sheng,Su Jie,Hua Renjie,Liang Cang,Chen Wangfan,Zhang Mi,Zhang Wenjun,Shi Lei,Dong Yuan 한국물리학회 2024 Current Applied Physics Vol.64 No.-
Tungsten doped indium oxide (In2O3: W, IWO) thin films have been attracting increasing attention due to their excellent optoelectronic properties. Here, a series of IWO thin films were prepared using direct current (DC) magnetron sputtering method, by varying the sputtering pressure. Analysis revealed that the IWO films prepared under sputtering pressure of 0.4 Pa exhibited excellent optoelectronic performance, with low square resistance, resistivity, high carrier concentration and mobility. The resulting semi-transparent perovskite solar cells (ST-PSCs), with IWO fabricated under 0.4 Pa, yield a PCE of 15.71 % for the large area modules of 100 cm2 (active area 64.8 cm2).
Su, Chong-Yu,Li, Yun-Song,Han, Yi,Zhou, Shi-Jie,Liu, Zhi-Dong Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.5
Objective: To explore the relationship between expressions of cell adhesion molecules CD44 v6 and E-cadherin (E-cad) and lymphatic metastasis in non-small cell lung cancer (NSCLC). Materials and Methods: Eightyseven tissue samples obtained from patients with primary NSCLC were collected in our hospital from Dec., 2007 to Dec., 2012, and the expressions of CD44 v6 and E-cad gene proteins in these samples were detected by immunohistochemical method. Results: In the tissue without lymphatic metastasis, the positive expression rate of CD44 v6 was significantly lower, whereas the normal expression rate of E-cad was notably higher than that with lymphatic metastasis (55.6% vs. 78.4%, 47.2% vs. 21.6%), and both differences had statistical significance (P<0.05). Besides, CD44 v6 and E-cad expressions had a significant correlation in the NSCLC tissue with lymphatic metastasis (P<0.05). Conclusions: The positive expression of CD44 v6 and abnormal expression of E-cad may play a very important role in promoting lymphatic metastasis of NSCLC, with synergistic effect. Hence, detection of CD44 v6 and E-cad expressions is conductive to judging the lymphatic metastasis in NSCLC.
Su Liu,Xiao-Xiao Shi,Qing-Zi Zhu,Wen-Juan Jiao,Zi-Jie Zhu,Hang Yu,Gui-YaoWang,Zengrong Zhu 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.1
Insect chemosensory proteins (CSPs) are small, water-soluble proteins which can bind and transport hydrophobic odorants through sensillum lymph to activate odorant receptors, thus play important roles in the olfactory recognition. In the present study, by searching the transcriptome data sets, a total of 22 candidate CSP genes were identified from Cnaphalocrocis medinalis, a serious lepidopteran rice pest in Asia. CSP proteins encoded by these genes showed typical characteristics: an N-terminal signal peptide, four conserved cysteine residues and the pattern of cysteine spacing. The expression profiles of these putative CSP genes were investigated using real-time quantitative PCR. The results showed that five genes (CmedCSP4, CmedCSP8, CmedCSP11, CmedCSP18 and CmedCSP21) were expressed primarily in antennae, suggesting their involvement in olfactory processes; whilst other genes are mainly expressed in non-olfactory tissues, such as abdomen and legs, indicating a broader physiological function for these CSPs. The findings will lead to a better understanding of the molecular mechanisms of chemoreception in C. medinalis.