The Research of Traveling Culture and Celebrity

Wu Lijun(吴,立军,) 세계문화관광학회 2008 Conference Proceedings Vol.9 No.0

The tourism culture contains huge economy potentials in the modernized market economy. As a determining factor to maintain the distinctive characteristic of the national or local tourism, the tourism culture must study and develop with unifying its traditional humanities. And there are very few articles in the celebrity phenomenon research. Celebrity phenomenon research is a sustainable important subjects in the tourism industry, needs to unify its tourist points localization and culture. This article analyzes the important impact of those celebrities on the tourism culture research instructed by a correct science development view, excavates the deep culture embodiment, develop the tourism industry by celebrity's influence on the humanities and the social environment, thus constructs new characteristic development therefore promotes the human and the nature harmonious development. 旅游文化在现代化的市场经济中蕴藏着巨大的经济潜能。而旅游文化作为一个国家或地区的放游业保持其自身特色的决定因素,就更需要结合其传统人文来研究和开发。而作为旅游文化中的名人现象的专门研究,其文章论述颇少。旅游文化中的名人现象研究是作为旅游产业中可持续发展的一个重要议题之一,更需要结合其旅游点的地域性、文化性。本文在正确科学发展观的指导下,分析名人在旅游文化研究中的重要影响和作用,提出旅游文化的再认识,深度发掘旅游文化内蕴,以名人的影响来提升旅游产业的人文和社会环境,从而构筑旅游新特色的良性发展,以促进和实现人与白然的和谐发展。

Novel Ceramides from Aerial Parts of Saussurea involucrata Kar. et. Kir.

Wei Wu,Yang Qu,Huiyuan Gao,Jingyu Yang,Jianguo Xu,Lijun Wu 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.9

Novel ceramides, together with nine known compounds were isolated from aerial parts of the Saussurea involucrata Kar. et. Kir. The novel structures were determined by spectroscopic methods and microscale chemical degradation. The ceramides showed appreciable cytotoxicity against three human tumor cell lines including human promyelocytic leukemia (HL-60), human melanoma (A375-S2) and human cervical carcinoma (HeLa) cell lines. The results suggested that this class of ceramides may have potential as an antitumor agent.

High Levels of Malic Acid Production by the Bioconversion of Corn Straw Hydrolyte Using an Isolated Rhizopus Delemar Strain

Xingjiang Li,Ya Liu,Ying Yang,Hua Zhang,Hualin Wang,Yue Wu,Min Zhang,Ting Sun,Jieshun Cheng,Xuefeng Wu,Lijun Pan,Shaotong Jiang,Hongwei Wu 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.3

The microbial fermentation of malic acid,which is one of the most important organic acid platformsused widely in food and chemical engineering, hasattracted considerable interest. A malate production strainwas isolated, a mutation was induced, and regulation of themetabolic network was then conducted. The identificationresults showed that the malic acid production strain, HF-119, belonged to Rhizopus delemar. An analysis of themetabolic pathway showed that the malic acid flux of thisstrain occurred through three main pathways, and manybyproducts, such as succinic acid, fumaric acid andethanol, were produced. Although corn straw hydrolytewas used, the metabolism of xylose was not as rapid as thatof glucose. Subsequently, breeding of the strains andregulation of the metabolic network resulted in an increasein malate yield, and the strain HF-121 produced more than120 g/L malic acid within 60 h. The ability to producemalic acid from biomass hydrolyte highlights the industrialdevelopment potential of this strain.

Experimental study and modeling of residence time distribution in impinging stream reactor with GDB model

Lijun Ji,Kui Chen,Jiawen Zhu,Bin Wu 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.4

Residence time distribution (RTD) in an impinging streams reactor with two or four nozzles was investigated with KCl solution as a tracer. The results showed that the flow pattern in the reactor was close to that in a continuous stirred tank reactor (CSTR). Macromixing process in the reactor was improved obviously when the opposite nozzles were added. Based on the analysis of flow region in the reactor, gamma distributionmodel with bypass (GDB) was applied for study on the RTD of the reactor. It was found that RTD in the impinging streams reactor could be finely described by the model. Also the effects of experimental conditions on parameters of model were analyzed according to the correlated values of the model parameters.

Use of Long-chain Alcohol in Extraction and Purification of Lincomycin from Fermentation Broth

Wu, Bin,Zhu, Jiawen,Chen, Kui,Ji, Lijun,Guo, Jianguo,Zhao, Jianxi 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.2

Low selectivity for lincomycin in butanol extraction process leads to relatively higher content of impurities. A novel process for extraction of lincomycin from fermentation broth was studied in this work. Mixture of n-octanol and n-decanol is used as extractant to replace n-butanol in extraction of lincomycin. Oprimal operation conditions for the process have been studied. Due to higher extraction selectivity for lincomycin A by long-chain alcohol, content of impurity(lincomycin B) in the final product is much lower than that in product by butanol process. Furthemore, the practicability for combination of long-chain alcohol and butanol in purification of linecomycin was investigated.

Enhanced Curdlan Production in Agrobacterium sp. ATCC 31749 by Addition of Low-polyphosphates

Lijun Yu,Jianrong Wu,Jia Liu,Xiaobei Zhan,Zhiyong Zheng,Chi Chung Lin 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.1

A large amount of adenosine triphosphate with high energy phosphate bonds is required for uridine triphosphate regeneration during curdlan biosynthesis by Agrobacterium sp. ATCC 31749. To supply high energy for curdlan synthesis, three low-polyphosphates (Na_4P_2O_7,Na_5P_3O_10, and (NaPO_3)_6) with higher energy phosphate bonds were employed to substitute for KH_2PO_4-K_2HPO_4in fermentation medium. Two genes encoding the polyphosphate metabolizing enzymes, polyphosphate kinase and exopolyphosphatase, were amplified and showed 95%homology to those in Agrobacterium sp. C58 by sequence analysis. The curdlan yields were enhanced by 23 and 134% when phosphate concentrations 0.024 mol/L of Na_5P_3O_10 and 0.048 mol/L of (NaPO_3)_6 respectively, were added in the medium. The maximum curdlan yield of 30 ±1.02 g/L was obtained with the addition of 0.048 mol/L of (NaPO_3)_6 with 5 g/L CaCO_3 in the medium. When CaCO_3 was removed from the culture and the three lowpolyphosphates were added, the pH and biomass yield dropped remarkably and little or no curdlan was produced. The culture containing 0.048 mol/L of (NaPO_3)_6 was mixed with KH_2PO_4-K_2HPO_4 and CaCO_3 in the medium,but showed no effect on curdlan production. However,curdlan yield was improved by 49 ~ 60% when CaCO_3was removed from the medium and KH_2PO_4-K_2HPO_4acted as a buffer. It appears that the positive effect of (NaPO_3)_6 on curdlan production required the buffering capacity of CaCO_3 and the absence of KH_2PO_4-K_2HPO_4competing as a phosphate supplier.

TinyIBAK: Design and Prototype Implementation of An Identity-based Authenticated Key Agreement Scheme for Large Scale Sensor Networks

( Lijun Yang ),( Chao Ding ),( Meng Wu ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.11

In this paper, we propose an authenticated key agreement scheme, TinyIBAK, based on the identity-based cryptography and bilinear paring, for large scale sensor networks. We prove the security of our proposal in the random oracle model. According to the formal security validation using AVISPA, the proposed scheme is strongly secure against the passive and active attacks, such as replay, man-in-the middle and node compromise attacks, etc. We implemented our proposal for TinyOS-2.1, analyzed the memory occupation, and evaluated the time and energy performance on the MICAz motes using the Avrora toolkits. Moreover, we deployed our proposal within the TOSSIM simulation framework, and investigated the effect of node density on the performance of our scheme. Experimental results indicate that our proposal consumes an acceptable amount of resources, and is feasible for infrequent key distribution and rekeying in large scale sensor networks. Compared with other ID-based key agreement approaches, TinyIBAK is much more efficient or comparable in performance but provides rekeying. Compared with the traditional key pre-distribution schemes, TinyIBAK achieves significant improvements in terms of security strength, key connectivity, scalability, communication and storage overhead, and enables efficient secure rekeying.

RPIDA: Recoverable Privacy-preserving Integrity-assured Data Aggregation Scheme for Wireless Sensor Networks

( Lijun Yang ),( Chao Ding ),( Meng Wu ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.12

To address the contradiction between data aggregation and data security in wireless sensor networks, a Recoverable Privacy-preserving Integrity-assured Data Aggregation (RPIDA) scheme is proposed based on privacy homomorphism and aggregate message authentication code. The proposed scheme provides both end-to-end privacy and data integrity for data aggregation in WSNs. In our scheme, the base station can recover each sensing data collected by all sensors even if these data have been aggregated by aggregators, thus can verify the integrity of all sensing data. Besides, with these individual sensing data, base station is able to perform any further operations on them, which means RPIDA is not limited in types of aggregation functions. The security analysis indicates that our proposal is resilient against typical security attacks; besides, it can detect and locate the malicious nodes in a certain range. The performance analysis shows that the proposed scheme has remarkable advantage over other asymmetric schemes in terms of computation and communication overhead. In order to evaluate the performance and the feasibility of our proposal, the prototype implementation is presented based on the TinyOS platform. The experiment results demonstrate that RPIDA is feasible and efficient for resource-constrained sensor nodes.

Facile preparation of oxygen-rich activated carbon from petroleum coke for enhancing methylene blue adsorption

Wu Wei,Zhang Xiaxiang,Yang Jianxiao,Lijun Cai,Li Xuanke 한국탄소학회 2020 Carbon Letters Vol.30 No.6

The oxygen-rich activated carbon (AC) was facilely developed using petroleum coke as a raw material by KOH activa�tion under the rapid heating rate. The porosity and surface chemistry of ACs prepared under diferent heating rates were characterized and their adsorption properties for methylene blue (MB) were investigated. The results showed that the AC5 prepared under the heating rate of 5 °C min−1 had the highest surface area compared with the AC10, AC15 or AC20, while the AC20 prepared under the heating rate of 20 °C min−1 consisted of the highest oxygen content and most –OH functional group compares with the other ACs. These indicated that rapid heating rate was against the formation of more developed porosity, however, it was benefcial to producing more oxygen functional groups. As to MB adsorption, AC15 exhibited the maximum adsorption capacity for MB of 884 mg g−1 due to high surface area of 2803 m2 g−1 and high oxygen content of 23.27%. Moreover, despite the fact that AC20 had much lower surface area than the AC5, the AC20 showed higher MB adsorption capacity than the AC5. This was because the AC20 has the highest content of –OH, which was a positive impetus for MB adsorption. Therefore, rapid heating rate was an efective and simple approach to preparing the oxygen-rich ACs for improving the adsorption capacity of MB.

Dominant genera of cyanobacteria in Lake Taihu and their relationships with environmental factors

Lijun Feng,Shiyou Liu,Wenxian Wu,Jiawen Ma,Pei Li,Hailing Xu,Na Li,Yaoyu Feng 한국미생물학회 2016 The journal of microbiology Vol.54 No.7

Cyanobacterial blooms in freshwaters have become one of the most widespread of environmental problems and threaten water resources worldwide. Previous studies on cyanobacteria in Lake Taihu often collected samples from one site (like Meiliang Bay or Zhushan Bay) and focused on the variation in patterns or abundance of Microcystis during the blooming season. However, the distribution of cyanobacteria in Lake Taihu shows differing pattern in various seasons. In this study, water samples were collected monthly for one year at five sites in Lake Taihu with different trophic status and a physicochemical analysis and denaturing gradient gel electrophoresis (DGGE) were conducted. DGGE fingerprint analysis showed that Microcystis (7/35 bands) and Synechococcus (12/35 bands) were the two most dominant genera present during the study period at all five sites. Cyanobium (3/35 bands) was the third most common genus which has seldom been previously reported in Lake Taihu. Redundancy analysis (RDA) indicated that the cyanobacterial community structure was significantly correlated with NO3 --N, CODMn, and NH4 +-N in the winter and spring, whereas it was correlated with water temperature in the summer and autumn. Limiting the nutrient input (especially of N and C loading) in Lake Taihu would be a key factor in controlling the growth of different genera of cyanobacteria.