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Seat Design under the Oriental Culture
Liu Tiejun 국민대학교 동양문화디자인연구소 2009 Journal of Oriental Culture&Design Vol.1 No.2
In the present globalized world, people live in the same houses, watch the same TV, and drive the same cars, but in each country, people's living styles remain unchanged. In Korea, Japan and other East Asian countries, the living style characterized by sitting on the ground has always been continued. In China, from the Tang and Song dynasties, the sitting style with the legs hanging down came into being, and has continued till now. Yet, on the ondol(炕) used by the northerners and the ta (couch楊) used by the southerners, the sitting habit is still kept, and people use sitting styled furniture on their ondol(炕) or ta(楊). We may say that changes in living style have caused changes in people's sitting manner, which has triggered the changes of furniture in size and shape in turn.
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Liu, Tiejun,Miura, Shigenobu,Arimura, Tomohiro,Tei, Min-Yi,Park, Enoch Y.,Okabe, Mitsuyasu The Korean Society for Biotechnology and Bioengine 2005 Biotechnology and Bioprocess Engineering Vol.10 No.6
Various processes which produce L-lactic acid using ammonia-tolerant mutant strain, Rhizopus sp. MK-96-1196, in a 3L airlift bioreactor were evaluated. When the fed-batch culture was carried out by keeping the glucose concentration at 30g/L, more than 140 g/L of L-lactic acid was produced with a product yield of 83%. In the case of the batch culture with 200g/L of initial glucose concentration, 121g/L of L-lactic acid was obtained but the low product yield based on the amount of glucose consumed. In the case of a continuous culture, 1.5g/L/h of the volumetric productivity with a product yield of 71% was achieved at dilution rate of $0.024\;h^{-1}$. Basis on these results three processes were evaluated by simple variable cost estimation including carbon source, steam, and waste treatment costs. The total variable costs of the fed-batch and continuous cultures were 88% and 140%, respectively, compared to that of batch culture. The fed-batch culture with high L-lactic acid concentration and high product yield decreased variable costs, and was the best-suited for the industrial production of L-lactic acid.
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Cabriole-legged Furniture in the Style of Song and Yuan Dynasties
Liu Tiejun,Zhang Chen 국민대학교 동양문화디자인연구소 2010 Journal of Oriental Culture&Design Vol.2 No.2
Song and Yuan dynasties is a booming period of Chinese classical furniture, and the cabriole legs became a fashion style of the furniture of that time. In this article, we use the triple proof method of images, real objects and literature to give a comprehensive analysis of the basic forms, structures and ornament features of the cabriole-Iegged furniture in the Song and Yuan dynasties, and, by taking full advantage of the rich information offered by the image data and by analyzing the relationship between furniture and human behavior, and between furniture and living space, we try our best to restore the usage mode of the furniture.
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A Method Based on Spectrum Superposition for Minimizing the Hazards of Blasting Vibration
Tiejun Tao,Sipeng Wan,Liansheng Liu,Tongyan Pan 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.5
The selection of delay time will directly affect the effect of vibration reduction in millisecond delay blasting. The commonly used frequency spectrum control methods have some problems such as the difficulty of seed wave selection and the complexity of nonlinear superposition model. Based on the principle of waveform linear superposition, this study proposes a new spectrum superposition method for minimizing the vibration hazards in an open deep-hole bench blasting. This method, with no need to select the seed waves, mainly uses the ratio of the Fourier spectrum of the combined vibration waveform and the single hole vibration waveform to quantify the suppressed vibration. By defining the suppression ratio K, the suppression ratio with frequency range of 10 − 60 Hz under different delay times was calculated, and the theoretical optimal vibration reduction delay time value of 10 − 15 ms was given. A high precision digital electronic detonator was used to verify the proposed spectrum superposition method. The test results show that the best delay time of field vibration reduction is 5 − 10 ms, which is lower than the theoretical best delay time of 10 − 15 ms. It is the authors’ belief that this phenomenon is mainly caused by the joints and cracks in the rock mass, which will prolong the actual superposition time of blasting seismic waves between adjacent holes. In addition, it is found that there is a negative correlation between the delay time and the main vibration frequency, which is mainly caused by the low-pass filtering characteristic of rock medium. In order to minimize the probability of resonance failure, an optimal delay of 5 ms based on the main vibration frequency was given.
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Mitsuyasu Okabe,Tiejun Liu,Shigenobu Miura,Tomohiro Arimura,Min-Yi Tei,Enoch Y. Park 한국생물공학회 2005 Biotechnology and Bioprocess Engineering Vol.10 No.6
Various processes which produce L-lactic acid using ammonia-tolerant mutant strain, Rhizopus sp. MK-96-1196, in a 3 L airlift bioreactor were evaluated. When the fed-batch culture was carried out by keeping the glucose concentration at 30 g/L, more than 140 g/L of L-lactic acid was produced with a product yield of 83%. In the case of the batch culture with 200 g/L of initial glucose concentration, 121 g/L of L-lactic acid was obtained but the low product yield based on the amount of glucose consumed. In the case of a continuous culture, 1.5 g/L/h of the volumetric productivity with a product yield of 71% was achieved at dilution rate of 0.024 h-1. Basis on these results three processes were evaluated by simple variable cost estimation including carbon source, steam, and waste treatment costs. The total variable costs of the fed-batch and continuous cultures were 88% and 140%, respectively, compared to that of batch culture. The fed-batch culture with high L-lactic acid concentration and high product yield decreased variable costs, and was the best-suited for the industrial production of L-lactic acid.
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Xiaoliu Dong,Tiejun Liu,Shijun Xu,Lixia Zhu,Panpan Zhang,Aibin Cheng,Qingqiang Qian 한국유전학회 2016 Genes & Genomics Vol.38 No.3
To investigate the relevance of ABCA1 R219K polymorphisms and serum ABCA1 protein concentration to Parkinson’s disease (PD) pathogenesis and classification in Chinese population. Between June 2013 to January 2014, 108 patients diagnosed with PD at Department of Neurology, Tangshan People’s Hospital, Tangshan were enrolled in the PD group, and 123 healthy individuals, from Health Screening Center of the same hospital, with matched age, gender, and education were enrolled in the control group. Polymerase chain reaction–restriction fragment length polymorphism method was used to detect ABCA1 R219K polymorphisms and enzyme-linked immunosorbent assay used to measure serum ABCA1 concentrations. Frequencies of R/K and K/K genotypes, and K allele of ABCA1 R219K polymorphisms were significantly lower in the PD group than the control group (all P\0.05). Significant differences existed in distributions of genotype frequencies, including R/R, R/K and K/K, between PD and control group of each classification (all P\0.05). ABCA1 concentrations were significantly different in the PD and control group (P\0.05); also ABCA1 concentrations were very different among PD patients with different genotypes (all P\0.05). Serum concentrations of ABCA1were significantly different among PD patients in different classifications (all P\0.05), suggesting the negative correlation between ABCA1 serum concentration and PD classification (r = -0.776, P\0.05). And serum concentrations of ABCA1 showed obvious differences among cases with three different genotypes in each classification (all P\0.05). ABCA1 R219K polymorphisms and serum concentration were associated with pathogenesis and classification of PD, and K allele may be a protective genetic factor.
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Study on the bio-function of lipA gene in Aspergillus flavus
Wenzhao Bai,Tiejun Feng,Faxiu Lan,Guanglan Lin,Guanglan Lin,Opemipo Esther Fasoyin,Yaju Liu,Kunzhi Jia 한국유전학회 2019 Genes & Genomics Vol.41 No.1
Lipoic acid synthase (LipA) plays a role in lipoic acid synthesis and potentially affects the levels of acetyl-CoA, the critical precursor of tricarboxylic acid (TCA) cycle. Considering the potential effect of LipA on TCA cycle, whether the enzyme is involved in the growth and aflatoxin B1 (AFB1) biosynthesis, the significant events in Aspergillus flavus is yet known. The study was designed to explore the role of lipA gene in A. flavus, including growth rate, conidiation, sclerotia formation, and biosynthesis of AFB1. LipA coding lipoic acid synthetase was knocked out using homologous recombination. The role of lipA gene in A. flavus morphogenesis (including colony size, conidiation, and sclerotia formation) was explored on various media, and the bio-function of lipA gene in the biosynthesis of AFB1 was analyzed by thin layer chromatography analysis. The growth was suppressed in △lipA. The formation of conidia and sclerotia was also reduced when lipA gene was deleted. Moreover, AFB1 was down-regulated in ΔlipA compared with WT controls. LipA plays a role in the development of A. flavus and AFB1 biosynthesis, contributing to the full understanding of the lipA bio-function in A. flavus.
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Highly Porous Cellulose Microbeads and their Adsorption for Methylene Blue
Jiarui Hua,Ranju Meng,Tiejun Wang,Huiying Gao,Zhenze Luo,Yuanyuan Jin,Lin Liu,Juming Yao 한국섬유공학회 2019 Fibers and polymers Vol.20 No.4
Highly porous cellulose microbeads with porosity of more than 90 % were successfully prepared via a faciledissolution and subsequent regeneration of cellulose in H2SO4/Na2SO4 coagulation bath. Effects of coagulation temperature,H2SO4, and Na2SO4 concentration on the microstructure, average diameter, porosity, specific surface area, and mechanicalproperty of formed cellulose beads were investigated systematically. In view of the high porosity and specific area, thecellulose beads were used as adsorbents for dye removal. The results revealed that the porous cellulose beads exhibited highadsorption performance with maximum adsorption capacity of 48.80 mg/g for cationic dye methylene blue. Besides, theporous cellulose beads also presented a potential in practical application and its adsorption capacity for methylene blue stillretained 29.43 mg/g after six adsorption-desorption cycles.
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