Analysis of Biogenic Amines and Biogenic Amine-Producing Bacteria in Chunjang, a Black Bean-Sauce

Xuezhi Bai,Bo Young Byun,Il Beom Park,Han-Joon Hwang,Jae-Hyung Mah 한국식품영양과학회 2011 한국식품영양과학회 학술대회발표집 Vol.2011 No.10

Effect of CBN surface coating on properties of abrasive and vitrified CBN composites

Xuezhi Wang,Minghai Wang,Jingqiang Zhang,Wenbo Fan,Tianbiao Yu 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.1

The advantages of CBN abrasive and vitrified bonds allow the wide use of vitrified CBN grinding tools. However, theirproperties can be affected by various factors such as vitrification itself and binding between vitrified bond and abrasive grains. In view of this, the current work aims to improve the binding characteristics of vitrified bond and abrasive grains byelucidating the effect of CBN surface coating. In particular, the thermal properties of typical nickel and titanium coatedabrasive grains were compared with those of ordinary abrasive grains. Furthermore, the strength, microstructure and phasecomposition of vitrified CBN composites were studied as well. According to the results, the thermal stability of abrasive grainsdecreased after coating processing. However, applying the vitrified CBN composite material and sintering, if appropriable, wasshown to ensure protection of the abrasive grains. Moreover, as an intermediate transition layer, the bonding properties ofvitrified bond and abrasive grains can be improved to some extent. Finally, the vitrified Ti-coated CBN composite was foundto possess the best performance.

Population genetic variations of the matrix metalloproteinases-3 gene revealed hypoxia adaptation in domesticated yaks (Bos grunniens)

Xuezhi Ding,Chao Yang,Pengjia Bao,Xiaoyun Wu,Jie Pei,Ping Yan,Xian Guo 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.12

Objective: As an iconic symbol of Qinghai-Tibetan Plateau and of high altitude, yak are subjected to hypoxic conditions that challenge aerobic metabolism. Matrix metalloproteinases-3 (MMP3) is assumed to be a key target gene of hypoxia-inducible factor-1α that function as a master regulator of the cellular response to hypoxia. Therefore, the aim of this investigation was to identify the DNA polymorphism of MMP3 gene in domestic yak and to explore its possible association with high-altitude adaptation. Methods: The single-nucleotide polymorphisms (SNPs) genotyping and mutations scanning at the MMP3 locus were conducted in total of 344 individuals from four domestic Chinese yak breeds resident at different altitudes on the Qinghai-Tibetan Plateau, using high-resolution melting analysis and DNA sequencing techniques. Results: The novel of SNPs rs2381 A→G and rs4331 C→G were identified in intron V and intron VII of MMP3, respectively. Frequencies of the GG genotype and the G allele of SNP rs2381 A→G observed in high-altitude Pali yak were significantly higher than that of the other yak breeds resident at middle or low altitude (p<0.01). No significant difference was mapped for SNP rs4331 C→G in the yak population (p>0.05). Haplotype GC was the dominant among the 4 yak breeds, and Pearson correlation analysis showed that the frequencies of GC was significantly lower in Ganan (GN), Datong (DT), and Tianzhu white yaks (TZ) compared with Pali (PL) yak. The two SNPs were in moderate linkage disequilibrium in high-altitude yaks (PL) but not in middle-altitude (GN, DT) and low-altitude (TZ) yaks. Conclusion: These results indicate that MMP3 may have been subjected to positive selection in yak, especially that the SNP rs2381 A→G mutation and GC haplotypes might contribute to adaptation for yak in high-altitude environments.

Investigating the miscibility of poly (butylene adipate-co-terephthalate)/poly (lactic acid) mixtures through multi-scale simulation and experiments

Xuezhi Li,Yuanyuan Qin,Haojie Li,Guangjun Liu,Junyu Fu,Feng Li,Zhanchun Chen 한국고분자학회 2023 Macromolecular Research Vol.31 No.9

The processability and practical applications of poly (butylene adipate-co-terephthalate) (PBAT) /poly (lactic acid) (PLA) blends are limited due to their lower miscibility. To investigate the miscibility of various PBAT/PLA composite ratios and the mechanism of miscibility between them, PBAT/PLA blends with different ratios were prepared using the melt mixing method. A combination of multi-scale simulations and experiments were employed to investigate the miscibility of the composites. Molecular dynamics simulations analyzed PBAT/PLA mixtures that are incompatible and showed the molecular basis of their incompatibility through the radial distribution function (RDF). The degree of miscibility of different ratios of PBAT/PLA composites was described using the Flory–Huggins interaction parameter, indicating that the 50/50 PBAT/PLA blend has the worst miscibility. Mesoscopic dynamics described the mesoscopic morphology of PBAT and PLA blends visually. The results obtained from the simulations were consistent with scanning electron microscope (SEM) and differential scanning calorimeter (DSC) experiments, indicating the simulations' reliability. This work provides a molecular perspective on the mechanism of thermodynamic insolubility of PBAT and PLA, which can inspire future PBAT/PLA hybrid modifications.

CULTURE MEDIA RECYCLING AND GROWTH INHIBITORS CHARACTERIZATION FOR THE PRODUCTION OF MICROALGAL BIOFUEL

Xuezhi Zhang,Qiang Hu 한국신재생에너지학회 2015 AFORE Vol.2015 No.11

Effects of ZrO2 on physical and mechanical properties of vitrified bond CBN composite materials

Xuezhi Wang,Tianbiao Yu,Xue Sun,Zixuan Wang,Wanshan Wang 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.9

The effects of ZrO2 on the physical and mechanical properties of vitrified bond and vitrified boron nitride (CBN) compositeswere systematically investigated. The basic vitrified bond (B2O3-Al2O3-SiO2-Li2O-Na2O) and ZrO2 make up the vitrified bond,and then constitute the vitrified CBN composites consists together with CBN abrasives. The addition of ZrO2 has a certaininfluence on refractoriness, liquidity, bending strength of vitrified bond. With the increase of adding amount of ZrO2 therefractoriness of vitrified bonds gradually rises, and fluidity of vitrified bonds becomes lower. When the ZrO2 addition amountreaches a certain extent, the crystalline phase-ZrSiO4 will appear during the sintering process. In addition, the ZrO2 can addto a certain extent, improve the strength of the bond and CBN composites, when ZrO2 addition amount of 8 wt.%, theperformance of the vitrified bond is the most. Its value changes from 69.74 MPa to 87.45 MPa.

Formation and Destruction of Biogenic Amines in Chunjang and Jajang

Xuezhi Bai,Bo Young Byun,Jae-Hyung Mah 한국식품영양과학회 2012 한국식품영양과학회 학술대회발표집 Vol.2012 No.10

Lee T’oegyehak’s view of scholarship reflected from the structure of his ten drawings on sage leaning

( Zhang Xuezhi ) 성균관대학교 유교문화연구소 2006 儒敎文化硏究(中文版) Vol.6 No.-

聖學十圖在結構上是一個包括天道、人性、本體、功夫、理想、行爲的整體。聖學的淵源在天道,天道的性質是仁.天道在人心中體現爲心統性情,仁爲體,心爲用。退溪非常重視儒家學統,把人格的養成作爲小學、大學敎育的根本目的。他把“敬”貫徹于一切修養工夫中,敬旣是一種態度,也是一種境界,一種落實在日常行爲中的實踐方法。李退溪的聖學十圖是對朱熹思想的發展,它完整地體現了李退溪的學問觀。 Ten drawings on sage leaning is a whole that include Heaven and human nature, noumenon, effort, ideality, action, etc. The source of sage leaning is Heaven, the character of Heaven is benevolence, the benevolence represent as different principles of order. Heaven materialize nature and feelings that together in mind, the benevolence is substance, and mind is function. T’oegyehak regard highly Confucian tradition of education, he treat moral cultivation as ultimate aim in the all human phases. He carry out the seriousness in all practice actions. Lee T’oegyehak’s ten drawings on sage leaning is a development from zhuxi’s thought, it put up wholly T’oegyehak, view of scholarship. [Article in Chinese]

Wang Fuzhi’s Annotation on Zhouyi and Learning Transmutation from Ming to Qing Dynasty

( Zhang Xuezhi ) 성균관대학교 유교문화연구소 2007 儒敎文化硏究(中文版) Vol.7 No.-

王夫之痛感明代經學極敝, 學者以理學取代經學的弊端, 力圖恢復經學奠立價值系統, 規範禮樂制度, 指導修身治世的作用, 以經典注釋扭轉明代語錄之學, 將宋明理學重視價值傳統, 重視人格修養, 重視身心體驗和形上關懷的特點與儒家的注經傳統統一於一個載體上。王夫之的《周易》詮釋以《周易》尚有、尚動、尚生生之流行的哲學重建儒家思想, 澄汰儒家思想中的佛老影響, 為新的時代建立學術典範。他的乾坤並建的學說對氣本論的褒揚, 對佛道和陽明後學的批評, 對朱子學的張揚, 處處都與明末的時代風氣相呼應, 對清初的學術內容具有引導作用。 Wang Fuzhi was keenly feel the abuse about corrupt study of Confucian classics in Ming dynasty, strive to resume the function of study of Confucian classics that upbuild value system and normalize rite institution and guide to cultivate morality, turn the style of study in Ming by this. Wang Fuzhi’s annotation on Zhouyi rebuild Confucianism with advocating exist and act and engender, discard influence from Buddhism and Daoism in Confucianism, based learning apotheosis for new time. His doctrine that build Qian and Kun equally canonized materialism of Qi, criticize the school of Wang Yangming’s disciple, celebrate Zhuxi’s theory echo with time ethos in last Ming everywhere, have a effect of leading learning content in early Qing. [Article in Chinese]

Liu Jishan’ Doctrine of Good and Evil in His Pre-Modern Consciousness

( Zhang Xuezhi ) 성균관대학교 유교문화연구소 2009 儒敎文化硏究(中文版) Vol.0 No.11

劉蕺山融和理學和心學二派, 以氣爲万物的構成基元, 同時從天人一理的角度, 認爲天地万物的枢纽就是人心的枢纽, 意卽人心的枢纽。蕺山從纠正陽明后學“虛玄而蕩、情識而肆”的流弊出發, 着意突出“意”的決定后天念頭髮生的先天意向這一作用, 强調意是心之所存而非心之所發, 意是獨體, 是超出具體善惡的至善。“誠意”是保任先天本有之意根不受形氣的染汚, 誠意卽是愼獨。蕺山最重視《大學》, 以《大學》的誠意爲全部學術的出發点, 突出心有主宰之意, 歸顯于密, 反對朱子和陽明以心之所發釋意, 尤其反對陽明“四句敎”, 强調意的至善品格。 Liu Jishan crasis the School of Mind and the School of Principle, decide the material force as basis of all things. He consider that mind is the hinge of all things and that will is the hinge of mind. Jishan was from the point of view that correct the abuses in Wang Yangming’ followers: emptiness of mind and libertinism in desire. He pop out the will’s function that the decision of ideas in experience but was transcendent it-self. In the Jianshan’s view, will was superior to Good and evil, and was subsistent forever. Effort of sincerity of the will was maintenance of connatural root of the good from pollution of the body and desire. Jishan regard the book of Great learning as the jumping-off place all of his doctrines. Jishan pop out the will’s station of dominate. And opposed Wang Yangming’s “Four-Sentence Teaching”. [Article in Chinese]