Enforcing security for multimedia Networking

Li Wang,Ye Li,Guang Li Zhao 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-

In the era of the digital word and the Internet, resent advances in network bandwidth, computing power, compression technique, and storage devices have facilitated increasing application of multimedia including text, music, image and video. However, most of multimedia contents transmitted in the Internet or wireless networks can be illegally copied and redistributed without more effort. Thus, enforcing security has become one of the most significant tasks. The objective of this paper is to give an overview of current developments and problems in the field of security in multimedia networking. This paper first describes the several security issues including passive attacks on video streams, end-to-end security for proxy-based video distribution and security mechanisms for wireless video distribution. Then the security transmission mechanisms based on cryptography, digital watermarking and tamper-resistant hardware are introduced. Real-time characteristics and high bandwidth requirements of multimedia data requires efficient transmission mechanisms. So security transmission mechanisms will be a major factor. Finally, the limits of transmission mechanisms are discussed.

cDNA cloning, expression, and immunolocalization of gonadinhibiting hormone (GIH) in Litopenaeus vannamei

Guang-li Li,Si-ping Deng,Shu-na Jiang,Man Ye,Hua-pu Chen,Siuming F. Chan,Chun-hua Zhu 한국유전학회 2015 Genes & Genomics Vol.37 No.10

In this study, the full-length GIH cDNA sequence from Litopenaeus vannamei was cloned from the eyestalk by reverse transcriptase polymerase chain reaction (RT-PCR) and rapid amplification of cDNA ends. The fulllength GIH cDNA was 865 bp with a 288 bp open-reading frame, which encoded a 96 amino acid prepro-GIH with 17 amino acid signal peptide. L. vannamei GIH (LvGIH) can be classified as a member of type-II crustacean hyperglycemic hormone polypeptide family. LvGIH shares 93.8 and 66.7 % amino acid sequence identity with GIH from Penaeus monodon, and the molt-inhibiting hormone from Marsupenaeus japonicas, respectively. By quantitative real-time PCR (qPCR), LvGIH mRNA transcripts were detected in fertilized eggs, nauplius, zoea, mysis and juveniles of 25, 35 and 40 days old. LvGIH transcript levels increased significantly with the development from fertilized eggs to juveniles. LvGIH transcript levels were highest in juveniles at 35 days old. By RT-PCR, LvGIH mRNA transcripts were detected only in the eyestalks and brains but not in the muscles, intestines, gills, heart, hepatopancreas, ovaries and testes of adults, and there was no difference in the expression level of LvGIH between males and females. Using the P. monodon anti-GIH antibody, we showed that LvGIH was located mainly in the XO-SG and slightly in axon, with similar fluorescence intensity found in XO and SG. To summarize, we have cloned and characterized the GIH of the shrimp L. vannamei. In addition to the GIH properties described in other crustaceans, a peak of LvGIH expression was identified at the time of sexual differentiation (i.e., day 35 larvae) suggesting that LvGIH may also be involved in the control of this process.

Genome-wide analysis of chemosensory protein genes in the small white butterfly Pieris rapae (Lepidoptera: Pieridae)

Mao-Ye Li,Xiu-Yun Jiang,Xi-Ya Liu,Yuan-Jie Huang,Shi-Guang Li,Su Liu 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.3

Chemosensory proteins (CSPs) play a crucial role in olfactory recognition in insects. The small white butterfly Pieris rapae—a major pest of Brassicaceae vegetables, which causes enormous economic losses—uses olfaction to locate its host plants. However, the molecular mechanism of olfaction in this species remains unknown. Herein, we performed a genome-wide and transcriptome-wide analysis of CSP genes in P. rapae and identified 21 CSPs (PrapCSP1 to PrapCSP21). Proteins encoded by these genes showed typical characteristics of CSPs—an Nterminal signal peptide and four positionally conserved cysteine residues. BLASTX analysis indicated that most P. rapae CSPs showed high amino acid identity with their respective orthologs in other lepidopterans. Phylogenetic analysis showed that most P. rapae CSPs were well segregated and were clustered into different branches. The 21 genes were located on six genomic scaffolds, and most genes were tandemly arrayed. Quantitative reverse transcription-PCR showed that PrapCSP3, 4, 16 and 21 had the highest expression level in the antennae; PrapCSP7 and PrapCSP18 were mainly expressed in the ovaries, and PrapCSP9 and PrapCSP17 were leg-enriched. PrapCSP11 and PrapCSP20 were found mainly in the heads and testes, respectively. Our findings provide a solid foundation for studying the function of these genes.

Extended Virtual Force-Based Coverage Scheme for Heterogeneous Wireless Sensor Networks

Guang Ye,Baihai Zhang,Longfei Wen,Senchun Chai,Lingguo Cui,Jun Li 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10

Wireless Sensor Networks (WSNs) have gained worldwide attentions in recent years. Since WSNs can be conveniently deployed to monitor a given field of interest, they have been considered as a great long-term economic potential for military, environmental, and scientific applications etc. One of the most active areas of research in WSNs is the coverage which is one of the most essential functions to guarantee quality of service (QoS) in WSNs. In this work, the coverage control problems in heterogeneous WSNs have been analyzed. The Delaunay Triangulation and modified ideal distance coefficient have been employed into traditional virtual force algorithm (which often used in homogeneous WSNs) to improve the QoS of the deployment. In order to validate the performance of the proposed algorithms, numerical simulations for heterogeneous WSNs cases have been considered in this work. The simulation results verify the effectiveness of this proposed algorithm.

Synthesis of intermediate for lamellarin H

Ye-cheng You,Guang Yang,Ai-ling Wang,De-peng Li 한국물리학회 2005 Current Applied Physics Vol.5 No.5

Fabrication processing of a intermediate, 2,4,5-trimethoxy-a-chlor-acetophenone, was reported in details in this paper. The inter-mediate is the key substance for synthesis of lamellarin H and its derivatives by a simple synthesis route proposed recently. Lam-ellarin H has been shown to have antitumour activity (in particular, against human lung cancer) and anti-HIV properties. Theformed intermediate was identied by means of IR spectrum, HPLC, UV spectrum, H NMR and melting point measurement..

A Poly(trypan blue)-Modified Anodized Glassy Carbon Electrode for the Sensitive Detection of Dopamine in the Presence of Uric Acid and Ascorbic Acid

Li, Xiao-Bo,Rahman, Md. Mahbubur,Ge, Chuang-Ye,Xu, Guang-Ri,Lee, Jae-Joon The Electrochemical Society 2017 Journal of the Electrochemical Society Vol.164 No.2

<P>A conducting polymeric film of trypan blue (TB) was deposited onto an anodized glassy carbon electrode (AGCE) surface by electropolymerization. The poly(trypan blue)-modified AGCE was used for the determination of dopamine (DA) in the presence of uric acid (UA) and ascorbic acid (AA). The PTB/AGCE exhibits good electrocatalytic behavior for the oxidation of DA in phosphate buffer solution (PBS, pH 7.0). The electrochemical oxidation signals of DA, UA, and AA are well-resolved into three distinct peaks in cyclic voltammograms (CVs) with the anodic peak potential separations (Delta E-pa) of ca. 186, 145, and 331 mV between AA-DA, DA-UA, and AA-UA, respectively. The Delta E-pa values are large enough to discriminate DA from the interference of AA and UA. A detection limit of ca. 0.36 mu M (S/N = 3) was obtained for the sensing of DA with a linear range of 1-40 mu M in PBS (pH 7.0). The sensor could successfully determine the concentrations of DA in human urine samples with the recoveries of ca. 97.6-102.6%. This approach provides a simple, easy, sensitive, and selective method for the detection of DA in the presence of AA and UA. (C) 2016 The Electrochemical Society. All rights reserved.</P>

Tim-3 Expression by Peripheral Natural Killer Cells and Natural Killer T Cells Increases in Patients with Lung Cancer - Reduction after Surgical Resection

Xu, Li-Yun,Chen, Dong-Dong,He, Jian-Ying,Lu, Chang-Chang,Liu, Xiao-Guang,Le, Han-Bo,Wang, Chao-Ye,Zhang, Yong-Kui Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.22

Background: The purpose of this study was to investigate Tim-3 expression on peripheral CD3-CD56+ natural killer (NK) cells and CD3+CD56+ natural killer T (NKT) cells in lung cancer patients. Materials and Methods: We analyzed Tim-3+CD3-CD56+ cells, Tim-3+CD3-$CD56^{dim}$ cells, Tim-3+CD3-$CD56^{bright}$ cells, and Tim-3+CD3+CD56+ cells in fresh peripheral blood from 79 lung cancer cases preoperatively and 53 healthy controls by flow cytometry. Postoperative blood samples were also analyzed from 21 members of the lung cancer patient cohort. Results: It was showed that expression of Tim-3 was significantly increased on CD3-CD56+ cells, CD3-$CD56^{dim}$ cells and CD3+CD56+ cells in lung cancer patients as compared to healthy controls (p=0.03, p=0.03 and p=0.04, respectively). When analyzing Tim-3 expression with cancer progression, results revealed more elevated Tim-3 expression in CD3-CD56+ cells, CD3-$CD56^{dim}$ cells and CD3+CD56+ cells in cases with advanced stages (III/IV) than those with stage I and II (p=0.02, p=0.04 and p=0.01, respectively). In addition, Tim-3 expression was significantly reduced on after surgical resection of the primary tumor (p<0.01). Conclusions: Tim-3 expression in natural killer cells from fresh peripheral blood may provide a useful indicator of disease progression of lung cancer. Furthermore, it was indicated that Tim-3 might be as a therapeutic target.

Molecular characterization of a delta class glutathione S-transferase gene from the black cutworm Agrotis ipsilon

Su Liu,Ye Cao,Yu-Xing Zhang,Yue-Min Pan,Shi-Guang Li 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4

In insects, glutathione S-transferases (GSTs) play essential roles in the detoxification of xenobiotic toxins and elimination of oxidative stress induced by toxic compounds. In the present study, a delta class GST gene (AiGSTd) was identified and characterized in the black cutworm, Agrotis ipsilon (Lepidoptera: Noctuidae). The deduced protein sequence of AiGSTd contained highly conserved features of GST enzymes and shared high identities with its orthologs from other lepidopteran species. Recombinant AiGSTD protein was expressed in Escherichia coli and purified. The protein displayed the GSH-dependent conjugating activity toward the substrate 1-chloro-2,4-dinitrobenzene (CDNB). Moreover, AiGSTD had the ability to protect DNA from oxidative damage, and the E. coli cells overexpressing AiGSTD showed long-term resistance to oxidative stress. The AiGSTd transcripts were most abundant in the larval midgut. Exposure to chlorpyrifos and lambda-cyhalothrin increased lipid peroxidation in larvae and significantly upregulated AiGSTd expression levels. This study is the first report of molecular characterization of a GST in A. ipsilon, and the present study suggest that AiGSTD might be involved in protecting against the oxidative stress induced by insecticides.

Casein Kinase 2 interacts with human mitogen- and stress-activated protein kinase MSK1 and phosphorylates it at Multiple sites

( Yan Shi ),( Guang Hui Han ),( Hui Ling Wu ),( Kan Ye ),( Zhi Peng Tian ),( Jia Qi Wang ),( Hui Li Shi ),( Ming Liang Ye ),( Han Fa Zou ),( Ke Ke Huo ) 생화학분자생물학회 2009 BMB Reports Vol.42 No.12

Cloning and Expression of cDNA Encoding a Cysteine Protease Inhibitor from Clamworm and Its Possible Use in Managing Anoplophora glabripennis Motschulsky (Coleoptera: Cerambycidae)

( Sheng Nan Li ),( Dao Sen Guo ),( Bo Guang Zhao ),( Jian Ling Ye ),( Jie Tian ),( Wen Qing Ren ),( Yun Wei Ju ),( Peng Cui ),( Rong Gui Li ) 한국미생물 · 생명공학회 2010 Journal of microbiology and biotechnology Vol.20 No.8

A cDNA encoding a cysteine protease inhibitor (CPI) was isolated from the cDNA library of clamworm Perinereis aibuhitensis Grube. The deduced amino acid sequence analysis showed that the protein had 51%, 48%, and 48% identity with Zgc: 153129 from Danio rerio, cystatin B from Theromyzon tessulatum, and the ChainA, stefin B tetramer from Homo sapiens, respectively. The gene was cloned into the intracellular expression vector pET-15b and expressed in Escherichia coli. The recombinant CPI (PA-CPI) was purified by affinity chromatography on Nicharged resin and ion-exchange chromatography on DEAE-Sepharose FF. The relative molecular mass of PACPI was 16 kDa as deduced by SDS-PAGE. Activity analysis showed that the recombinant protein could inhibit the proteolytic activity of papain. A constitutive and secretive expression vector was also constructed, and the cDNA encoding CPI was subcloned into the vector for extracellular expression. Western blotting analysis results showed that the PA-CPI was secreted into the medium. Bioassay demonstrated that E. coli DH5α harboring pUC18ompAcat-CPI showed a significant difference in mortality to the Asian longhorned beetle Anoplophora glabripennis compared with untransformed E. coli DH5α and control.