Effects of Traditional Chinese Cooking Methods on Formation of Heterocyclic Aromatic Amines in Lamb Patties

Haitao Guo,Zhenyu Wang,Han Pan,Xin Li,Li Chen,Weili Rao,Yuan Gao,Dequan Zhang 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.3

Different amounts of the potent mutagenic and/or carcinogenic heterocyclic aromatic amines (HAAs) areformed in muscle-based foods under different cookingmethods. HAAs (9 varieties) in lamb patties cooked usingtraditional Chinese cooking methods (roasting, frying, panfrying,and stewing in seasonings) were investigated. Thetotal HAAs contents in roasted, fried, pan-fried, and stewedpatties were 4.39-123.15 ng/g, 3.59-43.24 ng/g, 0.71-10.05ng/g, and 51.07-120.32 ng/g, respectively. Amounts of HAAsincreased as cooking time increased. 2-amino-1-methyl-6-phenylimidazo [4,5-b] pyridine (PhIP) was the dominantHAAs in deep roasted and fried samples, while 1-methyl-9H-pyrido [3,4-b] indole (Harman) and 9H-pyrido [3,4-b]indole (Norharman) were the main HAAs in pan-fried andstewed samples. Types and contents of HAAs formed atdifferent cooking times using different methods are unique. Stewing in seasoning generated a higher HAAs contentthan the high-temperature cooking methods roasting,frying, and pan-frying.

AI 기술을 적용하여 동물 입양을 위한 새로운 서비스 디자인 생성

Guo,Haoyue,Zhang Muxin,Chen Xie,Li Yueyi,Liang Lan,Pan Young Hwan 한국서비스디자인학회 2020 한국서비스디자인학회 학술대회자료집 Vol.2020 No.-

Effect of support on the performance of Mn–Cu oxides for low temperature selective catalytic reduction of NO with NH3

Wei-Guo Pan,Jie-nan Hong,Rui-Tang Guo,Wen-long Zhen,Hong-lei Ding,Qiang Jin,Cheng-gang Ding,Shi-yi Guo 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

MnOx–CuOx/TiO2 and MnOx–CuOx/Al2O3 catalysts were prepared by sol–gel method and used for low temperature selective catalytic reduction of NO with NH3. The results showed that MnOx–CuOx/TiO2 had better catalytic activity and SO2 resistance than MnOx–CuOx/Al2O3 in the temperature range of 100–250 ℃. The properties of the catalysts were characterized by using XRD, N2 adsorption, temperature programmed reduction (H2-TPR) and temperature programmed desorption (NH3-TPD). It was found that the support has a great impact on the acidity of catalyst; TiO2 and Al2O3 can promote the formation of Lewis acid sites and Bro¨ nsted acid sites respectively.

Transiting test method for galloping of iced conductor using wind generated by a moving vehicle

Pan Guo,Dongwei Wang,Shengli Li,Lulu Liu,Xidong Wang 한국풍공학회 2019 Wind and Structures, An International Journal (WAS Vol.28 No.3

This paper presents a novel test method for the galloping of iced conductor using wind generated by a moving vehicle which can produce relative wind field. The theoretical formula of transiting test is developed based on theoretical derivation and field test. The test devices of transiting test method for aerodynamic coefficient and galloping of an iced conductor are designed and assembled, respectively. The test method is then used to measure the aerodynamic coefficient and galloping of iced conductor which has been performed in the relevant literatures. Experimental results reveal that the theoretical formula of transiting test method for aerodynamic coefficient of iced conductor is accurate. Moreover, the driving wind speed measured by Pitot tube pressure sensors, as well as the lift and drag forces measured by dynamometer in the transiting test are stable and accurate. Vehicle vibration slightly influences the aerodynamic coefficients of the transiting test during driving in ideal conditions. Results of transiting test show that the tendencies of the aerodynamic coefficient curve are generally consistent with those of the wind tunnel tests in related studies. Meanwhile, the galloping is fairly consistent with that obtained through the wind tunnel test in the related literature. These studies validate the feasibility and effectiveness of the transiting test method. The present study on the transiting test method provides a novel testing method for research on the wind-resistance of iced conductor.

Silencing downstream of receptor kinase gene (drk) impairs larval-pupal ecdysis in Leptinotarsa decemlineata (Say)

Pan Deng,Jun-Li Du,Li-Li Mu,Kai-Yun Fu,Wen-Chao Guo,Guo-Qing Li 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.1

In insects, an insulin-like peptide (ILP) triggers the formation of the insulin receptor (InR)/the insulin receptor substrate Chico complex. The complex then recruits downstream of receptor kinase (Drk) and phosphatidylinositol-3-kinase (PI3K) to initiate two signaling branches, i.e., Drk-mitogen-activated protein kinase (MAPK) and Pi3K-protein kinase B subdivisions. Previous findings reveal that RNA interference (RNAi) of LdILP2 or Ldchico, rather than Ldpi3k92E, impairs larval-pupal and pupal-adult molting in the Colorado potato beetle Leptinotarsa decemlineata. It is accordingly hypothesized that the Drk-MAPK branch regulates larval metamorphosis. In the present paper, we first found that silencing LdILP2, Ldchico or Ldpi3k92E did not decrease the expression level of Lddrk, indicating other receptor tyrosine kinases’ signaling except insulin pathway is not affected in the RNAi larvae. Moreover, two InRs and Torso were highly expressed in the final larval instars. Furthermore, RNAi of either Lddrk or Ldchico, or both of them equally affected larval-pupal and pupal-adult molts, and similarly repressed the expression of representative MAPK (Ldras and Ldraf), ecdysteroidogenesis (Ldphm and Ldsad), and 20E signaling (LdEcR, LdUSP, LdHR3 and LdE75) genes. 20E feeding by Lddrk RNAi larvae completely restored the reduced mRNA levels of LdEcR, LdHR3 and LdE75, but did not rescued the decreased Lddrk and LdUSP levels and the lowered pupation and emergence rates. Therefore, our findings suggest that the Drk-MAPK branch is involved in metamorphosis regulation in L. decemlineata.

Two-Step Oxidation of Refractory Gold Concentrates with Different Microbial Communities^s

( Guo-hua Wang ),( Jian-ping Xie ),( Shou-peng Li ),( Yu-jie Guo ),( Ying Pan ),( Haiyan Wu ),( Xin-xing Liu ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.11

Bio-oxidation is an effective technology for treatment of refractory gold concentrates. However, the unsatisfactory oxidation rate and long residence time, which cause a lower cyanide leaching rate and gold recovery, are key factors that restrict the application of traditional bio-oxidation technology. In this study, the oxidation rate of refractory gold concentrates and the adaption of microorganisms were analyzed to evaluate a newly developed two-step pretreatment process, which includes a high temperature chemical oxidation step and a subsequent bio-oxidation step. The oxidation rate and recovery rate of gold were improved significantly after the two-step process. The results showed that the highest oxidation rate of sulfide sulfur could reach to 99.01 % with an extreme thermophile microbial community when the pulp density was 5%. Accordingly, the recovery rate of gold was elevated to 92.51%. Meanwhile, the results revealed that moderate thermophiles performed better than acidophilic mesophiles and extreme thermophiles, whose oxidation rates declined drastically when the pulp density was increased to 10% and 15%. The oxidation rates of sulfide sulfur with moderate thermophiles were 93.94% and 65.73% when the pulp density was increased to 10% and 15%, respectively. All these results indicated that the twostep pretreatment increased the oxidation rate of refractory gold concentrates and is a potential technology to pretreat the refractory sample. Meanwhile, owing to the sensitivity of the microbial community under different pulp density levels, the optimization of microbial community in bio-oxidation is necessary in industry.

한국 소장 중국 간본(刊本) 통속소설에 대한 술론(述論)

潘建國 ( Pan Jian-guo ) 성균관대학교 대동문화연구원 2021 大東文化硏究 Vol.113 No.-

현존하는 여러 서목을 통계 분석한 결과, 한국에서 소장하고 있는 중국 통속소설 간본은 많으나 주로 청나라 중후반의 坊刻本, 청나라 말기 민국시기의 활자본과 石印本이 주를 이루며, 학술적 문헌가치가 상대적으로 높은 명 刻本과 청 초기 간본은 소장 량에 있어 한계가 있다. 그러나 그 중에는 유일본이나 선본이 적지 않다. 『型世言』, 『莽男兒』와 같이 중국에는 없는 소설 작품뿐만 아니라『皇明英烈傳』, 『百家公案』, 『廉明公案』, 『醒世姻緣傳』, 『引鳳簫』 등 명청 소설 초기의 중요한 판본도 소장하고 있어 충분한 학술적 가치가 있다. 조선 왕실 및 연행 사절은 중국 통속소설을 한반도에 유입하는 과정에서 매우 중요한 역할을 하였다. 비록 儒學이 한반도의 사회와 문화에서 주도적인 지위를 차지하고 있었지만 중국 통속소설은 전반적으로 여전히 최고의 경지에 이르기 힘들었다. 하지만, 한자 문화라는 특수한 힘에 의해 알게 모르게 대대로 조선인들에게 영향을 미쳤다. According to the statistical analysis of several existing bibliographies, the amount of Chinese printed popular fictions collected in South Korea is considerable, but the main is bookshop printed editions in mid and late Qing and stereotype or lithographic editions in late Qing and early republic. The amount of Ming and early Qing editions which have higher academic and documentation value is limited, but there are still some rare and the only existing editions, not only some lost fictions in China such as Xingshiyan, Mangnaner, but also some early important editions in Ming and Qing dynasty, such as Huangmingyingliezhuan, Baijiagongan, Lianminggongan, Xingshiyinyuanzhuan, Yinfengxiao, which can help academic work. In the process of the introduction of Chinese popular fictions to the Korean Peninsula, the Korean royal family and Yanxingshi played an important role. Although Chinese fictions didn't get enough attention in the Korean Peninsula, where Confucianism dominated, they still influenced generations of Koreans, directly or indirectly, using the special power of the Chinese character culture.

남북조수당지여백제적왕래 (南北朝隋唐之與百濟的往來)

한국반(Guo Pan Han) 충남대학교 백제연구소 1994 百濟硏究 Vol.24 No.-

Effect of preparation methods on the performance of CeO2/Al2O3catalysts for selective catalytic reduction of NO with NH3

Rui-Tang Guo,Yue Zhou,Wei-Guo Pan,Jie-nan Hong,Wen-long Zhen,Qiang Jin,Cheng-gang Ding,Shi-yi Guo 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6

CeO2/Al2O3 catalysts prepared by three methods were investigated for selective reduction of NO with NH3. It was found that the catalyst prepared by the single step sol–gel method had the best SCR activity and SO2 resistance performance. From the results of BET, XRD, TPD and TPR, it can be concluded that large surface area, strong interaction, highly dispersed nano-crystalline ceria, high NH3 adsorption capacity and good redox ability might be the main reasons for the excellent performance of CeO2/Al2O3catalyst prepared by the single step sol–gel method.

Absorption of NO from simulated flue gas by using NaClO2/(NH4)2CO3 solutions in a stirred tank reactor

Rui-Tang Guo,Wei-Guo Pan,Jian-Xing Ren,Xiao-Bo Zhang,Qiang Jin 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.1

Experiments were performed in a stirred tank reactor to study the absorption kinetics of NO into aqueous solutions of NaClO2/(NH4)2CO3 solutions. The absorption process is a fast pseudo-reaction, and the reaction was found to be second-order with respect to NO and first-order with respect to NaClO2, respectively. The frequency factor and the average activation energy of this reaction were 4.56×1011 m6/(mol2 s) and 33.01 kJ/mol respectively. The absorption rate of NO increased with increasing reaction temperature, but decreased with increasing (NH4)2CO3 solution.