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  • 1
    Keywords: Computer science -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (1263 pages)
    Edition: 1st ed.
    ISBN: 9788132216650
    Series Statement: Advances in Intelligent Systems and Computing Series ; v.243
    DDC: 004
    Language: English
    Note: Intro -- Preface -- Committee -- Contents -- 1 Image and Template Security for Palmprint -- Abstract -- 1…Introduction -- 2…Image Protection -- 2.1 Chaotic Mixing -- 2.2 Watermarking -- 3…Template Security -- 3.1 Proposed System -- 4…Conclusion -- References -- 2 Extending Network Lifetime by Time-Constrained Data Aggregation in Wireless Sensor Networks -- Abstract -- 1…Introduction -- 2…Related Work -- 3…System Model and Problem Definition -- 4…Solution and Implementation -- 5…Conclusion -- References -- 3 The Complex Network Analysis of Power Grid: A Case Study of the West Bengal Power Network -- Abstract -- 1…Introduction -- 2…Fundamentals of Power System as a Graph Theoretic Model -- 3…Modeling the Topology of Power Grid as a Complex Network -- 3.1 Topological Analysis of Power Grid -- 3.1.1 Number of Links (m) -- 3.1.2 Average Nodal Degree ( \langle k \rangle ) -- 3.1.3 Ratio Parameter (r) -- 3.1.4 Pearson Coefficient ( \rho ) -- 3.1.5 Degree Distribution -- 3.1.6 Clustering Coefficient -- 3.1.7 Average Shortest Path -- 3.2 Random Graphs (ER) -- 3.3 Preferential Attachment (PA) -- 4…Experimental Results and Discussions -- 5…Conclusions -- References -- 4 Comparison and Analysis of Node Deployment for Efficient Coverage in Sensor Network -- Abstract -- 1…Introduction -- 2…Problem Formulation -- 2.1 Efficient Coverage Area Ratio Calculation -- 2.2 Sensor and Coverage Model -- 3…Sensor Node Deployment and Coverage Area Calculation -- 3.1 Sensor Node Deployment Based on Square Pattern -- 3.1.1 Nine Sensors at the Vertices of Square -- 3.1.2 Sensor Nodes at the Center of Sixteen Circles -- 3.2 Sensor Node Deployments Based on Triangular Pattern -- 3.2.1 Sensor Deployment at the Three Vertices of a Triangle -- 3.2.2 Sensor Deployment at Vertexes of the Rhomb -- 3.2.3 Sensor Deployment at a Meeting Circle of Six Circles. , 4…Comparison and Result Analysis -- 4.1 Total Coverage Area Versus Number of Nodes -- 4.2 Net Efficient Coverage Area Ratio Versus Number of Nodes -- 5…Conclusion -- References -- 5 Performance Analysis of Routing Protocols for VANETs with Real Vehicular Traces -- Abstract -- 1…Introduction -- 2…Related Works -- 3…Overview of LAR, DSR, and AODV Protocols -- 4…Problem Formulation -- 4.1 Assumption -- 4.2 Intelligent Driver Model with Intersection Management -- 5…Simulation Environments and Result Analysis -- 5.1 Packet Delivery Ratio -- 6…Conclusions -- References -- 6 A Bluetooth-Based Autonomous Mining System -- Abstract -- 1…Motivation -- 2…Why a Wireless System? -- 3…Why Bluetooth? -- 4…Methodology -- 5…Flowcharts -- 6…Algorithms -- 6.1 Database Entry -- 6.2 Advance Search -- 6.3 Scanning -- 7…Results/Conclusion -- 8…Related Work -- 8.1 Tracking Systems Based on Triangulation Method -- 8.2 Tracking Systems Based on Scanning Technique -- 8.3 Epidemic Communication -- References -- 7 Transistor Representation of a Low-Power Reversible 32-Bit Comparator -- Abstract -- 1…Introduction -- 2…Reversible Logic Gates -- 3…Literature Survey -- 4…Proposed 3 x 3 Reversible Gates -- 4.1 Proposed Reversible Gate1 -- 4.2 Proposed Reversible Gate2 -- 4.3 Realization of the Classical Operations -- 5…Transistor Implementation of the Proposed Reversible Gates Using GDI Method -- 5.1 Transistor Implementation of Proposed Reversible Gate1 -- 5.2 Transistor Implementation of Proposed Reversible Gate2 -- 6…Proposed Design of 1-Bit Comparator -- 7…Realization of Proposed 4-Bit Comparator -- 7.1 Logic Diagram to Find the Greater of Two 4-Bit Numbers -- 7.2 Logic Diagram to Find the Equality of Two 4-Bit Numbers -- 7.3 Logic Diagram to Find the Smaller of Two 4-Bit Numbers -- 8…Realization of 32-Bit Comparator -- 9…Simulation Results -- 10…Conclusion. , 8 Performance Enhancement of Brillouin Distributed Temperature Sensor Using Optimized Fiber -- Abstract -- 1…Introduction -- 2…Optimization -- 3…Proposed Model -- 4…Results -- 5…Conclusion -- References -- 9 To Study the Architectural Designs of a Proposed Comprehensive Software Extractor for Reengineering Tool: A Literature Survey -- Abstract -- 1…Introduction -- 2…Functional Requirement for Reengineering Tool -- 3…Extractor in Details -- 4…Conclusions -- References -- 10 Detection of Web-Based Attacks by Analyzing Web Server Log Files -- Abstract -- 1…Introduction and Background -- 2…Web-Based Attacks -- 3…Web Server Log Files -- 4…Problem Formulations -- 4.1 iFrame Injection Attack -- 4.2 Buffer Overflow Attack -- 5…Experimental Works and Result Analysis -- 5.1 Experimental Works -- 5.1.1 iFrame Injection Attack -- 5.1.2 Buffer Overflow Attack -- 5.2 Result Analysis -- 6…Conclusion -- References -- 11 A Survey of Energy-Aware Routing Protocols and Mechanisms for Mobile Ad Hoc Networks -- Abstract -- 1…Introduction -- 2…Energy or Power Consumption in MANETs -- 3…Energy-Aware Routing Mechanisms -- 4…Routing Protocols Based on Node Energy Status -- 5…Routing Protocols Based on Transmission Power Control -- 6…Conclusion -- References -- 12 Lexical Ontology-Based Computational Model to Find Semantic Similarity -- Abstract -- 1…Introduction -- 2…Lexical Ontology and Semantic Similarity -- 2.1 Semantic Similarity Aspects Using WordNet Lexical Ontology -- 2.2 Indo WordNet Structure -- 3…Proposed Semantic Similarity Module -- 3.1 Framework for Proposed Module -- 3.2 Proposed Algorithms -- 4…Experiments and Results -- 4.1 The Benchmark Data Set -- 4.2 Results -- 5…Conclusion and Future Work -- References -- 13 Energy-Efficient Cluster-Based Aggregation Protocol for Heterogeneous Wireless Sensor Networks -- Abstract -- 1…Introduction. , 2…Review on Cluster-Based Data Aggregation Techniques -- 3…Wireless Sensor Network Model -- 4…Radio Energy Dissipation Model -- 4.1 Two-Level Heterogeneous Networks -- 5…Objective and Scope -- 5.1 Proposed Approach -- 6…Implementation and Performance Evaluation -- 7…Results -- 8…Conclusion and Future Scope -- References -- 14 Digital Watermarking Based on Magic Square and Ridgelet Transform Techniques -- Abstract -- 1…Introduction -- 2…Proposed Watermarking Algorithms -- 2.1 Magic Square Procedure -- 2.2 Method 1 -- 2.3 Method 2 -- 3…Results -- 4…Conclusion -- References -- 15 Circle of Trust: One-Hop-Trust-Based Security Paradigm for Resource-Constraint MANET -- Abstract -- 1…Introduction -- 2…The Trust-Based Security Solution -- 2.1 The Environment -- 2.2 The Trust Model and the Node Evaluation Scheme -- 2.3 The Architecture -- 3…Security Analysis of the Solution -- 3.1 The Secure Routing Protocol -- 3.2 Analysis Based on Known Attacks -- 4…Discussion -- 5…Conclusion and Future Work -- References -- 16 Design of a Biometric Security System Using Support Vector Machine Classifier -- Abstract -- 1…Introduction -- 2…Feature Extraction for the Biometric System -- 2.1 ZCPA Feature Extraction for Input Speech -- 2.2 PCA Feature Extraction for Input Image -- 3…Support Vector Machine Classifier -- 4…Working of Biometric Security System -- 5…Results -- 6…Conclusion -- Acknowledgment -- References -- 17 Impact of Distance Measures on the Performance of Clustering Algorithms -- Abstract -- 1…Introduction -- 2…Clustering Algorithms -- 3…Distance Measures -- 3.1 Euclidean Distance -- 3.2 Standardized Euclidean Distance -- 3.3 Manhattan Distance -- 3.4 Mahalanobis Distance -- 3.5 Cosine Distance -- 3.6 Correlation Distance -- 4…Experimental Results and Discussions -- 4.1 Datasets Used -- 4.2 Evaluation on Clustering Efficiency -- 5…Conclusions -- References. , 18 Gender Identification Using Gait Biometrics -- Abstract -- 1…Introduction -- 2…Methodology -- 2.1 Silhouette Extraction -- 2.1.1 Feature Extraction -- 3…Network Structure -- 3.1 Feed-Forward Back-Propagation Neural Network -- 3.2 Cascade-Forward (CF) Back-Propagation Network -- 4…Computational Analysis -- 5…Conclusion and Future Work -- References -- 19 A Survey on Business Context -- Abstract -- 1…Introduction -- 2…Context -- 3…Context Awareness -- 3.1 Sensor and Context Types -- 4…Business Context -- 4.1 Business Context Awareness -- 5…Context Modeling -- 5.1 Key Value Models -- 5.2 Markup Scheme Models -- 5.3 Graphical Models -- 5.4 Object-Oriented Models -- 5.5 Logic-Based Models -- 5.6 Ontology-Based Models -- 5.7 Guideline for Business Context Modeling -- 6…Conclusion -- Acknowledgment -- References -- 20 Enhanced Caching for Geocast Routing in Vehicular Ad Hoc Network -- Abstract -- 1…Introduction -- 2…Related Work -- 3…Proposed Work -- 3.1 Protocol Design -- 3.2 Improved Caching Technique -- 3.3 Transmission with Full Radio Transmission Range Power -- 4…Simulation Results and Performance Analysis -- 5…Conclusion and Future Work -- References -- 21 Cooperation Enforcement and Collaboration Inducement in Mobile Ad Hoc Networks -- Abstract -- 1…Introduction -- 2…Related Work -- 3…Trust, Activity, and Strategy -- 3.1 Evaluating Trust Level -- 3.2 Evaluating Activity Level -- 3.3 Strategy Coding -- 4…Game Model Based on Trust and Activity -- 4.1 The Game on Network -- 4.2 Payoff for Participants -- 4.3 The Fitness Function -- 5…The Tournament -- 6…Evolution of Strategy Using Genetic Algorithm -- 7…Experiments -- 8…Conclusions and Future Work -- References -- 22 Uncoupling of Mobile Cloud Computing Services: An Architectural Perspective -- Abstract -- 1…Introduction -- 2…Overview of Tuple Space Model. , 3…Proposed Approach of Uncoupling of Mobile Cloud Computing Services.
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  • 2
    Keywords: Information technology -- Congresses. ; Computer science -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (858 pages)
    Edition: 1st ed.
    ISBN: 9788132217596
    Series Statement: Advances in Intelligent Systems and Computing Series ; v.255
    DDC: 004
    Language: English
    Note: Intro -- Preface -- Organizing Committee -- Contents -- Part ISignal and Image Processing -- 1 The PSF Measurement for Motion-Blurred Image Based on Analyzing the Frequency Spectrum -- Abstract -- 1…Introduction -- 2…Theoretical Analysis -- 2.1 The Relationship Between the PSF and Blurred Image Spectrum -- 2.2 Snake Model -- 2.3 Hough Transform in Polar Coordinate -- 3…The Point Spread Function Measurement for Motion-Blurred Image -- 3.1 The Steps for Solving Point Spread Function -- 3.2 Analysis of Experimental Results -- 4…Conclusion -- References -- 2 EBR Analysis of Digital Image Watermarking -- Abstract -- 1…Introduction -- 2…Watermarking Communication Model -- 3…Analysis of Watermarking Channel -- 4…Payload Capacity and EBR of Watermark Detection -- 5…Conclusions -- Acknowledgments -- References -- 3 Image Descriptors Based on Statistical Thermodynamics and Applications -- Abstract -- 1…Introduction -- 2…Research Ideas and the Main Content -- 2.1 Image Descriptor -- 2.2 Image Descriptor: Image Energy -- 2.3 Image Descriptor: Image Mass -- 2.4 Image Descriptor: Image Pressure -- 2.5 Image Descriptor: Image Temperature -- 3…Experiments and Analysis -- 3.1 Description of the Digital Image -- 3.2 Clustering Applications -- 3.3 Content-Based Image Retrieval -- 4…Conclusions -- Acknowledgments -- References -- 4 A Novel Image Retrieval Method Based on Fractal Code and Fuzzy Set -- Abstract -- 1…Introduction -- 2…Fractal Coding -- 3…Fuzzy Set Measure -- 3.1 Fuzzy Classifier -- 3.2 Proposed Algorithm -- 4…Similarity Measure -- 5…Experiment -- 6…Conclusion -- References -- 5 Velocity Evaluation in Traffic Accidents Occurred at the Road Intersection Based on Image Processing -- Abstract -- 1…Introduction -- 2…Algorithm Principle -- 3…Main Steps of Algorithm -- 3.1 Obtain Frame Sequences -- 3.2 Accurate Velocity of the Vehicle Calculation. , 3.3 Range Velocity of the Vehicle Calculation -- 4…Conclusion -- References -- 6 A Hybrid Method for Extracting Liver from 3D CT Image -- Abstract -- 1…Introduction -- 2…Related Research -- 3…Proposed Method -- 3.1 Three-Dimensional Region-Growing Algorithm -- 3.2 Image Morphology -- 4…Experimental Results -- 5…Summary -- References -- 7 A New Image-Fusion Technique Based on Blocked Sparse Representation -- Abstract -- 1…Introduction -- 2…Sparse-Coding Model -- 2.1 Selection of the Dictionary -- 2.2 Sparse Coding of Signals -- 3…Proposed Fusion Scheme -- 3.1 Fusion Framework Based on Sparse Coding -- 3.2 Fusion Rule -- 4…Experimental Results -- 5…Conclusion -- Acknowledgments -- References -- 8 The Studying of the Restoration of Defocused Images -- Abstract -- 1…Introduction -- 2…Disk Defocus Model -- 3…Gauss Defocus Model -- 4…Improved Defocus Model -- 5…Conclusion -- References -- 9 High-Order Total Variation-Based Image Restoration with Spatially Adapted Parameter Selection -- Abstract -- 1…Introduction -- 2…Problem Formulation -- 3…Implementation Details -- 4…Numerical Experiments -- Acknowledgments -- References -- 10 Research of Vehicle Identification Based on Adaptive Corner Detection -- Abstract -- 1…Introduction -- 2…Adaptive Harris Corner Detection -- 2.1 Harris Corner Detection Principle -- 2.2 Adaptive Harris Corner Detection Algorithm -- 3…Vehicle Classification and Recognition -- 3.1 Vehicle Matching Based on Hausdorff Distance -- 3.2 Experimental simulation and analysis -- 4…Conclusion -- References -- 11 Knowledge-Aided Bayesian Optimum Radar Detector -- Abstract -- 1…Introduction -- 2…Bayesian Optimum Radar Detector -- 3…Estimation Method for Detector Priori Distribution Parameter -- 3.1 PDF Fit-Based Method -- 3.2 Method of Fractional Moment -- 3.3 Method Based on Maximal Likelihood Estimation. , 4…KA-BORD Algorithm Performance Analysis -- 4.1 Algorithm Performance Analysis Based on Computer Simulation Data -- 4.2 Algorithm Performance Analysis Based on Sea-Clutter-Measured Data -- 5…Conclusion -- References -- Part IIComputer Security -- 12 An Improvement of an Identity-Based Key-insulated Signcryption -- Abstract -- 1…Introduction -- 2…Analysis of the Chen et al.'s Scheme -- 2.1 Review of the Chen et al.'s Scheme -- 2.2 Analysis -- 3…An Improved Scheme -- 3.1 Security Proof -- 4…Conclusion -- Acknowledgments -- References -- 13 Stability Analysis of a Rapid Scanning Worm Propagation Model with Quarantine Strategy -- Abstract -- 1…Introduction -- 2…Mathematical Model Formulation -- 3…The Stability Analysis for Equilibriums -- 3.1 Worm-Free Equilibrium and Its Stability -- 3.2 Endemic Equilibrium and Its Stability -- 4…Numerical Simulations -- 5…Conclusions -- Acknowledgments -- References -- 14 A Fuzzy Bayesian Approach to Enhance SCADA Network Security -- Abstract -- 1…Introduction -- 2…Architecture -- 3…Normal System Behavior Profiling -- 4…Anomaly Detection Algorithm -- 5…Simulations and Results -- Acknowledgments -- References -- 15 Trusted Network Access Authentication Scheme Based on the Label -- Abstract -- 1…Introduction -- 2…Summary of the Trusted Networks -- 3…Trusted Network Access Authentication Scheme Based on the Label -- 3.1 Scene Setting -- 3.2 Trusted Label -- 3.3 Access Authentication -- 4…Security Analysis -- 5…Conclusion -- References -- 16 A Mobile Terminal Authentication Scheme Based on Symmetric Cryptographic Mechanisms -- Abstract -- 1…Introduction -- 2…System Architecture -- 3…Authentication Process -- 3.1 Mobile User Registration -- 3.2 Authentication -- 3.3 Mobile User Unregistration -- 4…Scheme Analyze -- 4.1 Security Analyze -- 4.2 Performance Analysis -- 5…Conclusion -- Acknowledgments -- References. , 17 Wormhole Detection Algorithm Based on RTT and Neighborhood Information -- Abstract -- 1…Introduction -- 2…Wormhole Detection Algorithm Based on RTT and Neighborhood Information -- 2.1 Detecting Suspicious Neighbors -- 2.2 Looking for Abnormal Topology -- 2.3 Isolating False Neighbors -- 3…Simulation and Performance Analysis -- 4…Conclusion -- Acknowledgments -- References -- 18 Intrusion Detection Algorithm for the Wormhole Attack in Ad Hoc Network -- Abstract -- 1…Introduction -- 2…Wormhole Path-Tracking Algorithm Based on Detecting Nodes -- 2.1 The Specific Detection Algorithm Structuring -- 3…The Simulation -- 4…Conclusion -- Acknowledgments -- References -- 19 Ad hoc Eavesdropping Algorithm-Based Network Coding -- Abstract -- 1…Introduction and Related Research -- 2…Ad hoc Hacking Attack Resistance of Secure Network Coding -- 2.1 Network Model -- 2.2 Attack Model -- 2.3 Algorithm Ideas -- 2.4 Algorithm Ideas -- 3…Secure Proof -- 4…Communication Overhead -- 5…Conclusion and Outlook -- Acknowledgments -- References -- 20 Improved Halftone Visual Cryptography by Random Grids -- Abstract -- 1…Introduction -- 2…The Proposed Schemes -- 2.1 Random Position Selection -- 2.2 Homogeneous Distribution of SIPs -- 2.3 Generation of Halftone Shares -- 3…Simulation Results and Discussions -- 4…Discussions -- 5…Conclusions -- References -- 21 Statistical Tests for Combined Secret Key Sequence -- Abstract -- 1…Introduction -- 2…Binary Sequence Generation for Test -- 2.1 Combined Secret Key Generation -- 2.2 Generate and Save the Binary Sequence -- 3…Statistical Test and Assessment for CSK Sequences -- 3.1 Frequency (Monobit) Test -- 3.2 Runs Test -- 3.3 Serial Test -- 4…Conclusions -- Acknowledgments -- References -- Part IIICommunication and Networking -- 22 Interactive Satellite Remote Education System Based on Bluetooth and GPRS -- Abstract. , 1…Introduction -- 2…The Return Communication System -- 2.1 The Basic Frame of Method -- 2.2 Interactive Satellite Remote Education System Based on Bluetooth and GPRS -- 2.3 Data Interaction Process of System -- 3…The Design and Implementation of Core Modules -- 3.1 Terminal Node -- 3.2 Gateway -- 3.3 Mobile Node (Mobile) -- 4…Conclusions -- References -- 23 A Study of Smart Grid Communication Architecture -- Abstract -- 1…Introduction -- 2…SG Communications Requirements -- 3…SGICA -- 4…Information and Communication Technologies for SGICA -- 5…IP-Based Communications for SG -- 6…Summary -- Acknowledgments -- References -- 24 Green Router: Power-Efficient Router Design -- Abstract -- 1…Introduction -- 2…Architectural Design -- 3…Operation Mechanism -- 3.1 Dynamic Sleep and Wakeup -- 3.2 Dispatching Policy -- 4…Modeling and Evaluation -- 4.1 Modeling -- 4.2 Experiment and Evaluation -- 5…Conclusion -- References -- 25 Design and Implementation of Web Service for Scenario Data Service System in War Gaming -- Abstract -- 1…Introduction -- 2…Approach of Technology -- 3…Architecture of the System -- 4…Design and Implementation of Web Layer -- 4.1 Web Service Design -- 4.2 Index Service Design -- 5…Conclusion -- Acknowledgments -- References -- 26 Gateway of Internet of Things for Intelligent Warehouse Management System Based on Embedded Web Server -- Abstract -- 1…Introduction -- 2…Use Scenario and Functional Requirements of IOTGW -- 2.1 IOT Architecture of Intelligent Warehouse Management System -- 2.2 Functional Requirements of IOT Gateway -- 3…Design of Multiprotocol IOT-Gateway Based on Embedded Web Server -- 3.1 Design Elements and Principles -- 3.2 Architecture of Hardware and Software -- 4…Conclusions and Future Work -- Acknowledgments -- References -- 27 Research of Wireless Transmission Strategy for High-Speed Railway -- Abstract -- 1…Introduction. , 2…Research Environment and Content.
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Gerontology and Geriatrics 17 (1993), S. 111-122 
    ISSN: 0167-4943
    Keywords: Aging ; Cerebral enzymes ; Diet restriction ; Lizard ; Water deprivation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Gerontology and Geriatrics 6 (1987), S. 27-32 
    ISSN: 0167-4943
    Keywords: Aging ; Aspartate aminotransferase ; Hydrocortisone
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The synthesis of 3-deoxy-D-arabino-heptulosonate-7-phosphate (DAHP) is the first commitment of resources toward aromatics production in Escherichia coli. DAHP is produced during a condensation reaction between phosphoenolpyruvate (PEP) and erythrose 4-phosphate (E4P) catalyzed by DAHP synthases (coded by aroF, aroG, and aroH). Stoichiometric analysis has shown a severe PEP limitation in the theoretical yield of DAHP production from glucose due to the phosphotransferase system (PTS) for sugar uptake. This limitation can be relieved by (i) the recycling of pyruvate from PEP using PEP synthase (Pps) or (ii) use of non-PTS sugars such as xylose. Previous studies have shown the usefulness of overexpressing tktA (encoding transketolase), aroG, and pps (PEP synthase) for DAHP production in an aroB strain unable to utilize DAHP further. In the present study we confirm the predictions of the stoichiometric analysis by introducing pps, tktA, and aroG into vectors under independently controlled promoters. In glucose medium, although TktA has some positive effect on the final DAHP concentration, it has no effect on the yield (percent conversion). With Pps overexpression, the DAHP concentration produced from glucose is increased almost twofold and the yield is approaching the theoretical maximum, as predicted by the stoichiometric analysis. However, this Pps effect is observed only in the presence of both increased AroG and TktA. In xylose mimimal medium, the final DAHP concentration and the yield are completely determined by the AroG activity. TktA and Pps play no or insignificant roles, and the yield can reach the theoretical maximum without overexpression of these two enzymes. The results shown here are important for both rational design of metabolic pathways and industrial production of aromatics such as tryptophan, phenylalanine, indigo, quinic acid, and catechol.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 61 (1994), S. 337-342 
    ISSN: 0268-2575
    Keywords: micromixing ; continuous fermentation ; recombinant bacteria ; plasmid stability ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A reversed two-environment model has been to study micromixing in continuous fermentation for growth and product formation by recombinant bacteria. As an example, an Escherichia coli M72 strain harbouring the plasmid pPLc23trpA1 and producing tryptophan synthetase is considered. With excess substrate, 10% plasmid-free bacteria in the initial broth do not affect the steady-state concentrations of plasmid-containing bacteria but their mass fractions decrease significantly. With a smaller substrate concentration, the mass fractions decrease sharply as the dilution rate increases if micromixing is good; but concentrations still remain high. There is also a clear demarcation between regions of good and poor micromixing. These results are explained and an optimal combination of micromixing and dilution rate is suggested to maximise productivity.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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