Influence of Mist Intervals and Aeration Rate on Growth and Second Metabolite Production of Pseudostellaria heterophylla Adventitious Roots in a Siphon-mist Bioreactor

Gui Rong Wang,Nian Min Qi 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.6

Plant adventitious root culture in bioreactors is a promising alternative for the efficient production of medicinal herbs. Adventitious roots of Pseudostellaria heterophylla were induced from callus and then cultivated in a siphon-mist bioreactor. An orthogonal test established that the optimal medium for adventitious root induction was MS medium supplemented with 1.0 mg/L naphthaleneacetic acid and 2.0 mg/L 3-indolybutyric acid. Under these conditions, the average root number was more than 14 on each 1.0 cm diameter callus and the rooting rate reached 100%. The bioreactor was equipped with an integral siphon-spraying device designed to automatically supply the liquid medium. The operation parameters of the bioreactor were assessed by varying the mist interval and the aeration velocity. The mist interval was negatively related to average growth rate of the adventitious roots and positively related to saponin and polysaccharide content. A relatively high aeration rate was necessary to achieve the maximum biomass production, but the secondary metabolite production was not enhanced by increasing the aeration velocity.

HUD Image Vibration Detection on Improved Edge Detection and Corner Extraction

Rong-gui Ma,Ting Cao,Weixing Wang 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.1

书法美育视角下义务教育阶段书法教育刍论

천구이롱(Gui-Rong Chen) 한국서예학회 2023 서예학연구 Vol.42 No.-

서예교육은 중국의 초등학교 의무교육에서 綱要에 해당하는 부분으로 현재 이 단계의 서예교육은 학생들의 낮은 경필력, 붓글씨 미교육 부족 등의 현실적인 문제가 있다. 본고는 현재 서예교육 현황, 경필서예교육과 붓서예교육의 공통성과 차이점, 「中小学书法教育指导纲要」및 학생들의 학습수요 측면을 다루었다. 핵심 관점은 경필서예교육과 붓서예교육이 다르다는 것이다. 경필서예는 규범, 미관, 실용을 주요 목표로 삼아야 하며, 붓서예는 미교육과 실천을 결합해야 한다. 아울러 기술을 너무 중시하고 미학에 대한 중시를 소홀히 해서는 안된다는 것을 주장하였다.이 연구를 통해 현재 의무교육 단계의 서예교육에 대한 몇 가지 아이디어를 제공할 수 있을 것이다. Calligraphy education is an important part of compulsory education. At present, there are some practical problems in calligraphy education, such as poor writing ability and insufficient aesthetic education of calligraphy.This paper mainly studies the current situation of calligraphy education, the commonality and difference between calligraphy education and calligraphy art education, the Outline of Calligraphy Education in Primary and Secondary Schools and the students' learning needs.The key point is that calligraphy art education and writing education are different. Hard pen writing should aim at standardization, beauty and practicality.The conclusion can be used as a reference for calligraphy education in the current compulsory education stage.

AZ31 Mg합금 마찰용접부의 인장시험 동안 균열의 생성과 전파에 미치는 경도분포의 영향

강정윤(Gui-Rong Zhan) 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.11

HCP 결정구조를 갖는 Mg AZ31 합금의 동종 맞대기 마찰교반접합부의 인장 성질은 용접조건과 더불어 집합조직분포의 영향을 받는 것으로 알려져 있다. 본 연구에서는 마찰교반용접부의 인장성질에 미치는 회전속도(1500, 1800rpm)와 접합속도(83∼200mm/min, 4조건)의 영향과 더불어 미세조직 및 경도와의 상관관계를 규명하고, 더불어 인장시험 과정에서 파단경로와 파단형태를 분석하고, 집합조직과의 상관관계를 규명하고자 하였다. 접합부 인장강도와 FSW에서 입열로 사용되는 Weld Pitch (WP, (notation speed/welding speed))와의 상관관계를 분석한 결과, 동일 WP에서 1800prpm 시편이 인장강도가 높았고, 이들 시편들의 파단 형상(A)은 모두 시편의 SZ/TMAZ 계면에서 시편 두께 방형으로 수직으로 파단되는 것이 특징이었다. 반면에 1500rpm의 접합시편은 18N/V(83mm/min)를 제외하고, 모두 SZ/TMAZ 계면에서 TMAZ/모재 계면에 따라 파단되는 형상(B)이었다. 또한 인장강도는 1500과 1800RPM 모두 WP의 증가에 따라 증가하다 15N/V 이상에서 모두 감소하였다. 인장시험 시 인장시편의 변형과정을 연속촬영 하여 관찰한 결과, 최초 균열은 모두 시편 표면의 SZ/TMAZ 계면에서 발생하고, 각각 A형은 시편 두께 수직방향으로, B형은 SZ/TMAZ 계면에 따라 전진하여 파단되었다. 한편 자동 경도기로 경도분포를 조사한 결과, 툴과 맞닿는 표면(Crown Zone : CZ)의 경도는 모든 시편에서 평균 55HV이상이었고, WP가 증가할수록 증가하다 15WP 이상에서 감소하였으며, 동일 WP 조건에서 1800PPM의 것이 경도가 높았다. 결론적으로 인장강도 및 파단형태는 경도분포와 밀접한 관계를 가지고 있다. 즉 경도가 가장 낮은 SZ/TMAZ 경계에서 균열이 생성되고 전파되므로, 이들 영역의 경도분포와 경도 값에 따라 결정된다. 최고 인장강도를 얻을 수 있는 용접조건은 아주 좁다.

The Research on the Sustainable growth of Listed Companies in Chinese Steel Industry

LI Gui rong,WANG Wei 한국경영교육학회 2012 한국경영교육학회 학술발표대회논문집 Vol.2012 No.6

Steel industry is one of the important raw materials industries in China. In the Ministry of Industry and Information Technology, steel industry is included in the plan for ten big industries to be adjusted and developed, which shows its important position in the national economy. In the first 10 years of this century, continuous and extraordinary growth is a prominent feature of China's steel industry. Between the year 2000-2010, steel production has rose from 127 million tons to more than 600 million tons, an increase of about 4 times, which built a solid foundation for a big steel country and made China a veritable big country famous for steel production. At the same time, the rapid development of China's steel industry has also resulted in tremendous energy and resource consumption, which influences the industry's sustainable growth and hinder Chinato become a powerful country of iron and steel based on qualitative and quantitative standards. Extensive growth mode, merely pursuing the increase of quantity, is not desirable. It is very important for China to seek a sustainable growth pattern for steel industry. This paper studies sustainable growth of China's steel industry from a financial point of view, which will contribute to systematically analyze the sustainable growth of the listed companies in China, to identify the problems and make more evidence-based, sensible decisions in marketing, finance and manufacturing. Also, the studies can provide timely guidance for the growth strategies of other steel companies which have been listed, to be listed, and other small and medium enterprises to promote their healthy and stable developments. And it will lay a solid foundation for the sustainable development of China's steel industry and plays an important role for China in becoming a powerful country of iron and steel.Based on the theory of enterprises' sustainable development, this essay has made a comparative analysis on typical models of sustainable growth and analyzed the internal and external factors affecting listed companies' sustainable growth. Based on the development status of listed companies in China's steel industry, this essay selected 33 companies in the steel industry listed in Shanghai and Shenzhen Stock Exchange before 2006 after removed those having special conditions, such as "ST" companies whose stock exchanges were specially treated because of consecutive losses, and companies experienced a major business restructuring, etc. With the Robert Higgins' sustainable growth model, we tested the sustainable growth of the selected listed companies in the steel industry between 2006-2010 by using Wilcoxon's signed rank test. The empirical results show that the samples have not achieved sustainable growth whether as a whole or separated year by year. We also concluded that there was a increasing gap between the real growth rates and the sustainable growth rates in five years, which indicated that it was very serious for these companies to blindly pursue high-speed growth, and the financial sustainable growth in the steel industry has not got enough attentions in these companies. So it is not optimistic to achieve sustainable growth for listed companies in the steel industry.

Impact of a Glyphosate-Tolerant Soybean Line on the Rhizobacteria, Revealed by Illumina MiSeq

( Gui-hua Lu ),( Yin-ling Zhu ),( Ling-ru Kong ),( Jing Cheng ),( Cheng-yi Tang ),( Xiao-mei Hua ),( Fan-fan Meng ),( Yan-jun Pang ),( Rong-wu Yang ),( Jin-liang Qi ),( Yong-hua Yang ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.3

The global commercial cultivation of transgenic crops, including glyphosate-tolerant soybean, has increased widely in recent decades with potential impact on the environment. The bulk of previous studies showed different results on the effects of the release of transgenic plants on the soil microbial community, especially rhizosphere bacteria. In this study, comparative analyses of the bacterial communities in the rhizosphere soils and surrounding soils were performed between the glyphosate-tolerant soybean line NZL06-698 (or simply N698), containing a glyphosate-insensitive EPSPS gene, and its control cultivar Mengdou12 (or simply MD12), by a 16S ribosomal RNA gene (16S rDNA) amplicon sequencing-based Illumina MiSeq platform. No statistically significant difference was found in the overall alpha diversity of the rhizosphere bacterial communities, although the species richness and evenness of the bacteria increased in the rhizosphere of N698 compared with that of MD12. Some influence on phylogenetic diversity of the rhizosphere bacterial communities was found between N698 and MD12 by beta diversity analysis based on weighted UniFrac distance. Furthermore, the relative abundances of part rhizosphere bacterial phyla and genera, which included some nitrogen-fixing bacteria, were significantly different between N698 and MD12. Our present results indicate some impact of the glyphosate-tolerant soybean line N698 on the phylogenetic diversity of rhizosphere bacterial communities together with a significant difference in the relative abundances of part rhizosphere bacteria at different classification levels as compared with its control cultivar MD12, when a comparative analysis of surrounding soils between N698 and MD12 was used as a systematic contrast study.

A Gain-Scheduled Approach To The Transcient Stabilization Of Power Systems

Rong He,Kang-Zhi Liu,Shengwei Mei,Xiaoyang Gui 제어로봇시스템학회 2006 제어로봇시스템학회 국제학술대회 논문집 Vol.2006 No.10

Association Between Pancreatitis and Subsequent Risk of Pancreatic Cancer: a Systematic Review of Epidemiological Studies

Tong, Gui-Xian,Geng, Qing-Qing,Chai, Jing,Cheng, Jing,Chen, Peng-Lai,Liang, Han,Shen, Xing-Rong,Wang, De-Bin Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.12

This study aimed to summarize published epidemiological evidence for the relationship between pancreatitis and subsequent risk of pancreatic cancer (PC). We searched Medline and Embase for epidemiological studies published by February $5^{th}$, 2014 examining the risk of PC in pancreatitis patients using highly inclusive algorithms. Information about first author, year of publication, country of study, recruitment period, type of pancreatitis, study design, sample size, source of controls and attained age of subjects were extracted by two researchers and Stata 11.0 was used to perform the statistical analyses and examine publication bias. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated with the random effects model. A total of 17 articles documenting 3 cohort and 14 case-control studies containing 14,667 PC cases and 17,587 pancreatitis cases were included in this study. The pooled OR between pancreatitis and PC risk was 7.05 (95%CI: 6.42-7.75). Howeever, the pooled ORs of case-control and cohort studies were 4.62 (95%CI: 4.08-5.22) and 16.3 (95%CI: 14.3-18.6) respectively. The risk of PC was the highest in patients with chronic pancreatitis (pooled OR=10.35; 95%CI: 9.13-11.75), followed by unspecified type of pancreatitis (pooled OR=6.41; 95%CI: 4.93-8.34), both acute and chronic pancreatitis (pooled OR=6.13; 95%CI: 5.00-7.52), and acute pancreatitis (pooled OR=2.12; 95%CI: 1.59-2.83). The pooled OR of PC in pancreatitis cases diagnosed within 1 year was the highest (pooled OR=23.3; 95%CI: 14.0-38.9); and the risk in subjects diagnosed with pancreatitis for no less than 2, 5 and 10 years were 3.03 (95%CI: 2.41-3.81), 2.82 (95%CI: 2.12-3.76) and 2.25 (95%CI: 1.59-3.19) respectively. Pancreatitis, especially chronic pancreatitis, was associated with a significantly increased risk of PC; and the risk decreased with increasing duration since diagnosis of pancreatitis.

Meta-analysis of Outcomes Compared between Robotic and Laparoscopic Gastrectomy for Gastric Cancer

Liao, Gui-Xiang,Xie, Guo-Zhu,Li, Rong,Zhao, Zhi-Hong,Sun, Quan-Quan,Du, Sha-Sha,Ren, Chen,Li, Guo-Xing,Deng, Hai-Jun,Yuan, Ya-Wei Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.8

This meta-analysis was performed to evaluate and compare the outcomes of robotic gastrectomy (RG) and laparoscopic gastrectomy (LG) for treating gastric cancer. A systematic literature search was carried out using the PubMed database, Web of Knowledge, and the Cochrane Library database to obtain comparative studies assessing the safety and efficiency between RG and LG in May, 2013. Data of interest were analyzed by using of Review Manager version 5.2 software (Cochrane Collaboration). A fixed effects model or random effects model was applied according to heterogeneity. Seven papers reporting results that compared robotic gastrectomy with laparoscopic gastrectomy for gastric cancer were selected for this meta-analysis. Our metaanalysis included 2,235 patients with gastric cancer, of which 1,473 had undergone laparoscopic gastrectomy, and 762 had received robotic gastrectomy. Compared with laparoscopic gastrectomy, robotic gastrectomy was associated with longer operative time but less blood loss. There were no significant difference in terms of hospital stay, total postoperative complication rate, proximal margin, distal margin, numbers of harvested lymph nodes and mortality rate between robotic gastrectomy and laparoscopic gastrectomy. Our meta-analysis showed that robotic gastrectomy is a safe technique for treating gastric cancer that compares favorably with laparoscopic gastrectomy in short term outcomes. However, the long term outcomes between the two techniques need to be further examined.

Improvement of heat and drought photosynthetic tolerance in wheat by overaccumulation of glycinebetaine

Wang, Gui-Ping,Hui, Zhen,Li, Feng,Zhao, Mei-Rong,Zhang, Jin,Wang, Wei The Korean Society of Plant Biotechnology 2010 Plant biotechnology reports Vol.4 No.3

Within their natural habitat, crops are often subjected to drought and heat stress, which suppress crop growth and decrease crop production. Causing overaccumulation of glycinebetaine (GB) has been used to enhance the crop yield under stress. Here, we investigated the response of wheat (Triticum aestivum L.) photosynthesis to drought, heat stress and their combination with a transgenic wheat line (T6) overaccumulating GB and its wild-type (WT) Shi4185. Drought stress (DS) was imposed by controlling irrigation until the relative water content (RWC) of the flag leaves decreased to between 78 and 82%. Heat stress (HS) was applied by exposing wheat plants to $40^{\circ}C$ for 4 h. A combination of drought and heat stress was applied by subjecting the drought-stressed plants to a heat stress as above. The results indicated that all stresses decreased photosynthesis, but the combination of drought and heat stress exacerbated the negative effects on photosynthesis more than exposure to drought or heat stress alone. Drought stress decreased the transpiration rate (Tr), stomatal conductance (Gs) and intercellular $CO_2$ concentration (Ci), while heat stress increased all of these; the deprivation of water was greater under drought stress than heat stress, but heat stress decreased the antioxidant enzyme activity to a greater extent. Overaccumulated GB could alleviate the decrease of photosynthesis caused by all stresses tested. These suggest that GB induces an increase of osmotic adjustments for drought tolerance, while its improvement of the antioxidative defense system including antioxidative enzymes and antioxidants may be more important for heat tolerance.