Effects of Temperature, Illumination, and Sodium Ascorbate on Browning of Green Tea Infusion

Qian Ye,Hao Chen,Lin Bin Zhang,Jian Hui Ye,Jian Liang Lu,Yue Rong Liang 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.4

Browning of tea infusion is an obstructive factor influencing shelf life of ready-to-drink green tea. Effects of temperature and illumination on the browning of green tea infusion were investigated. It was shown that both elevated temperature and illumination led to the browning of green tea infusion, but temperature had greater effect on infusion color and level of catechins than illumination. The levels of unoxidized catechins such as (-)-epigallocatechin gallate (EGCg), (-)-epigallocatechin (EGC), (-)-epicatechin gallate (ECg), (-)-epicatechin (EC), and total catechins remaining in the tea infusion were significantly correlated to color parameters of the tea infusion. Sodium ascorbate inhibited the infusion browning by suppressing the oxidation of tea catechins and it is considered to be a more suitable preservative for prolonging shelf life of ready-to-drink green tea than ascorbic acid because it has less effect on tea taste. The effects of temperature and illumination on the epimerization of catechins were also discussed.

Isolation of L-theanine from Tea Solution by Cation Exchange Resin in Batch and Fixed Bed Column

Jian-Hui Ye,Yi-Wen Luo,Hui-Ling Liang,Jian-Liang Lu,Jing Jin,Yue-Rong Liang,Xin-Qiang Zheng,Xian-Yang Luo 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.2

L-Theanine, a bioactive compound in tea, was isolated from tea solution using cation exchange resin no.732. The adsorption of L-theanine by cation exchange resin no.732 fit the Langmuir isotherm model and was a monolayer molecular interaction process. Thermodynamic studies revealed that the adsorption of L-theanine by resin no.732 was an exothermic and spontaneous physically driven process. The adsorption capacity was influenced by temperature, initial concentration, and pH. The L-theanine adsorption capacity under conditions at room temperature,pH 4.73, and initial L-theanine concentration 18 g/L was 241.731 ± 3.679 mg/g. The Thomas model was fit to describe the column adsorption data at different flow rates and initial concentrations. The L-theanine adsorbed by resin no.732 could be desorbed by 0.134 mol/L Na2HPO4aqueous solution with a recovery rate of 84.96%. These findings indicate that resin no.732 was a promising material for isolating L-theanine from tea solution.

Giant electrocaloric effect in BaZr_0.2Ti_0.8O₃ thick film

Ye, Hui-Jian,Qian, Xiao-Shi,Jeong, Dae-Yong,Zhang, Shujun,Zhou, Yue,Shao, Wen-Zhu,Zhen, Liang,Zhang, Q. M. American Institute of Physics 2014 Applied Physics Letters Vol.105 No.15

A critical review on ammonium recovery from wastewater for sustainable wastewater management

Ye, Yuanyao,Ngo, Huu Hao,Guo, Wenshan,Liu, Yiwen,Chang, Soon Woong,Nguyen, Dinh Duc,Liang, Heng,Wang, Jie Elsevier 2018 Bioresource technology Vol.268 No.-

<P><B>Abstract</B></P> <P>The growing global population’s demand for ammonium has triggered an increase in its supply, given that ammonium plays a crucial role in fertilizer production for the purpose of food security. Currently, ammonia used in fertilizer production is put through what is known as the industrial Haber Bosch process, but this approach is substantially expensive and requires much energy. For this reason, looking for effective methods to recover ammonium is important for environmental sustainability. One of the greatest opportunities for ammonium recovery occurs in wastewater treatment plants due to wastewater containing a large quantity of ammonium ions. The comprehensively and critically review studies on ammonium recovery conducted, have the potential to be applied in current wastewater treatment operations. Technologies and their ammonium recovery mechanisms are included in this review. Furthermore the economic feasibility of such processes is analysed. Possible future directions for ammonium recovery from wastewater are suggested.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Growing global population ultimately calls for ammonium recovery. </LI> <LI> Wastewater is considered as the renewable resource for the ammonium recovery. </LI> <LI> The bioelectrochemical system can efficiently and effectively recover ammonium. </LI> <LI> Mechanism and technology of ammonium recovery were summarized. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Acetate-rich Cellulosic Hydrolysates and Their Bioconversion Using Yeasts

Ye-Gi Lee,주예빈,Liang Sun,박수정,Jin Yong-Su,김수린 한국생물공학회 2022 Biotechnology and Bioprocess Engineering Vol.27 No.6

Numerous technological advances have been made in the depolymerization and fermentation of lignocellulosic biomass. Nevertheless, economic feasibility is still a major concern for the bioconversion of lignocellulose into value-added products. Acetate—the most abundant carbon source after the sugars in cellulosic hydrolysates— has been considered a fermentation inhibitor, but it can also be a good substrate in industrial biotechnological processes. Co-consumption of acetate and cellulosic sugars by yeasts will improve the economic feasibility of any bioconversion processes using cellulosic hydrolysates. This study investigates state-of-the-art technologies for the utilization of the hemicellulose fractions of lignocellulosic biomass, rich in acetate and xylose. Furthermore, the potentials of acetate- and xylose-rich hydrolysates will be highlighted in diversifying the product profiles for lignocellulosic bioprocesses from bioethanol to drop-in fuels and other valueadded chemicals.

Three-dimensional fuzzy influence analysis of fitting algorithms on integrated chip topographic modeling

Zhongwei Liang,Bangyan Ye,Yijun Wang,Richard Kars Brauwer 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.10

In inspecting the detailed performance results of surface precision modeling in different external parameter conditions, the integrated chip surfaces should be evaluated and assessed during topographic spatial modeling processes. The application of surface-fitting algorithms exerts a considerable influence on topographic mathematical features. The influence mechanisms caused by different surfacefitting algorithms on the integrated chip surface facilitate the quantitative analysis of different external parameter conditions. By extracting the coordinate information from the selected physical control points and using a set of precise spatial coordinate measuring apparatus,several typical surface-fitting algorithms are used for constructing micro-topographic models with the obtained point cloud. In computing for the newly proposed mathematical features on surface models, we construct the fuzzy evaluating data sequence and present a new three-dimensional fuzzy quantitative evaluating method. Through this method, the value variation tendencies of topographic features can be clearly quantified. The fuzzy influence discipline among different surface-fitting algorithms, topography spatial features, and the external science parameter conditions can be analyzed quantitatively and in detail. In addition, quantitative analysis can provide final conclusions on the inherent influence mechanism and internal mathematical relation in the performance results of different surface-fitting algorithms, topographic spatial features, and their scientific parameter conditions in the case of surface micro modeling. The performance inspection of surface precision modeling will be facilitated and optimized as a new research idea for micro-surface reconstruction that will be monitored in a modeling process.

Clinicopathologic and Prognostic Significance of Carboxyl Terminus of Hsp70-interacting Protein in HBV-related Hepatocellular Carcinoma

Jin, Ye,Zhou, Li,Liang, Zhi-Yong,Jin, Ke-Min,Zhou, Wei-Xun,Xing, Bao-Cai Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.9

Background: Many factors, including molecular ones, were demonstrated to be associated with long-term prognosis of hepatocellular carcinoma (HCC). Thus far, the expression and clinicopathologic and prognostic significance of the carboxyl terminus of Hsp70-interacting protein (CHIP) in B-type hepatitis virus (HBV)-related HCC remain unknown. Materials and Methods: CHIP expression was detected by immunohistochemical staining of surgical samples from 79 patients with HCC with HBsAg positivity. In addition, correlations with clinicopathologic parameters and patient survival were evaluated. Results: It was found that positive CHIP staining was observed in tumor, but not non-tumor, tissues. High expression of CHIP was significantly related to larger tumor size, with marginally significant associations noted for presence of portal vein invasion and higher serum a-fetoprotein level. In addition, univariate analysis showed that high CHIP expression was a powerful predictor for dismal overall and disease-free survival. However, independent prognostic implications of CHIP were not proven in multivariate Cox regression test. Conclusions: CHIP is overexpressed in HBV-related HCC and is associated with unfavorable biological behavior as well as poor prognosis. However, its prognostic role needs to be further validated.

CALCULATION AND RESEARCH FOR TRANSIENT FLOWS IN POWER STATION OF BULB TUBULAR TYPE TURBINE AFTER LOAD REJECTION

YUN-LIANG GHIEN,CHAO WU,XIAO-MING U,MAO YE 한국수자원학회 2005 한국수자원학회 학술대회 Vol.2005 No.1

Research on Multi-turnaround Chain Cruise Itinerary of China, South Korea and Japan

임복순,Ye Xin-liang,Shi Yao,Yu Feng,Sun Rui-hong 한국해양관광학회 2022 해양관광학연구 Vol.15 No.1

The cruise route mainly involves three parts, cruise home port, Cruise itinerary and destination. This paper uses the Analytic Hierarchy Process (AHP) to rank the attractiveness of China, South Korea and Japan as tourist destinations and cruise home ports. From the ranking obtained by the AHP, the paper selects the cruise home port and destination port; uses the Baidu ranging tool to measure the navigation distance between the selected destination cities in China, South Korea and Japan, takes the optimal navigation path as the goal, use the Travelling Salesman Problem (TSP) to solve the circumnavigation cruise route, uses the Minimum Spanning Tree prim algorithm to solve the linear cruise route, substitutes the parameters into Java, and writes a program to obtain the optimal path. Combined with the deviation of the measured sailing distance, the smoothness of the channel, the availability of berths at the cruise port, the characteristics of the Cruise itinerary by mooring during the day and sailing at night, and the distance between adjacent ports, the route obtained by the solution is further improved when it is applied to the actual route design. The design ideas are slightly adjusted, the author focuses on the cost of sailing and time, and designs point-to-point cruise itinerary, circumnavigation cruise itinerary and linear cruise itinerary.

An improved algorithm for pile damage localization based on complex continuous wavelet transform

Jing-Liang Liu,Cheng-Xu Lin,Xi-Jun Ye,Wen-Ting Zheng,Yong-Peng Luo 국제구조공학회 2021 Smart Structures and Systems, An International Jou Vol.27 No.3

Since the complex continuous wavelet transform (CCWT) based pile damage detection method is empirical and subjective, an improved algorithm for pile damage localization based on CCWT is proposed by introducing K-means clustering and fast Fourier transform (FFT). In this method, the K-means clustering algorithm is used to accurately calculate the time coordinates of two energy concentrating points caused by the incident and reflected waves, respectively. Meanwhile, FFT is employed to estimate the concerned frequency band of the response signal. Therefore, a specific region in the time frequency plane is defined objectively and it can be used to search the phase angle turning points and localize pile damage. The proposed method is verified by numerical examples of piles with single and multiple damage positions. A parameter analysis is also conducted to investigate how damage depth and damage degree in piles affect the accuracy and effectiveness of the proposed method. The results demonstrate that the proposed method is able to localize a pile with a damage at least 2.5 m away from the pile head when the damage degree is as less as 5%. After that, dynamic tests of an actual square reinforced concrete pile and an actual circular reinforced concrete pile are investigated to verify the application of the proposed method on practical engineering. Although the proposed method is capable of localizing actual piles more accurately than the CCWT method, the problem of interference points needs to be addressed by mutual verification with other pile damage localization methods.