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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Mammals. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (865 pages)
    Edition: 1st ed.
    ISBN: 9783030171483
    DDC: 599
    Language: English
    Note: Intro -- Preface -- Contents -- Author Biography -- Part I: Pharma -- Chapter 1: Discovery and Early Development of the Limulus Test -- 1.1 Introduction -- 1.2 Early Observations and Test Development -- 1.3 Official Approval of the Limulus Amebocyte Lysate Test by Federal Agencies -- 1.4 End Points for the Detection of Endotoxin -- 1.5 Conclusion -- References -- Chapter 2: Origins and Evolution of Drug Regulation -- 2.1 Drug Regulations Origin in Tragedy -- 2.2 Biologics Drug Regulation -- 2.2.1 Early Biologics -- 2.2.2 Blood-Borne Concerns: HIV -- 2.2.3 Blood-Borne Concerns: Prions -- 2.3 Biologics Split Between CDER and CBER -- 2.3.1 Categories of Therapeutic Biological Products Transferred to CDER -- 2.3.2 Categories of Therapeutic Biological Products Remaining in CBER -- 2.3.3 Combination Products -- 2.4 Biosimilars -- 2.4.1 Patient Protection and Affordable Care Act -- 2.4.2 Differences in Regulation, Europe Versus U.S -- 2.5 Misadventures in Regulatory and Clinical Pharmacology -- 2.5.1 Compounding Misery -- 2.5.2 Subvisible Particulates -- 2.5.3 Clinical Cytokine Storm -- 2.5.4 Elusively Endotoxin -- References -- Chapter 3: LPS Structure, Function, and Heterogeneity -- 3.1 Introduction -- 3.2 Role of Lipopolysaccharides -- 3.3 Brief History of Lipopolysaccharides -- 3.4 LPS General Structural Architecture -- 3.5 O-Polysaccharides Structures -- 3.5.1 Inter Genera Common or Closely-Related O-chain Structures: The Example of Brucella abortus, Yersinia enterocolitica and Vibrio cholera -- 3.5.2 O-polysaccharide Structure-Function Relationships -- 3.5.3 Core Oligosaccharide Structures -- 3.5.4 Reducing Core Sugars -- 3.5.5 The Sugar Moiety of Bacterial Lipooligosaccharides (LOS) -- 3.6 Core Structure-Function Relationships -- 3.7 Lipid A Structures -- 3.7.1 Number and Length of Fatty Acids -- 3.7.2 Substitution of the Lipid A Phosphate Groups. , 3.7.3 Unusual Lipid A Backbone Structures -- 3.7.3.1 Lipid A with a 2,3-diamino-2,3-dideoxy-D-glucose (DAG) Backbones -- 3.7.3.2 Lipid A with Mixed DAG and GlcN Backbones -- 3.7.3.3 Lipid A with GlcN or DAG Disaccharide Backbones Without Phosphate Groups -- 3.8 Lipid A Recognition Through the TLR-4 Receptor: How Structural Modifications Impact Innate Immunity and Favor Bacterial Virulence and Pathogenicity. Applications to Human Health -- 3.9 Brief Description of the LPS Biosynthetic Pathway -- 3.10 Origin of LPS Heterogeneity -- 3.10.1 Impact of Biofilm Growth Conditions on LPS Structures -- 3.10.2 The Example of the Bordetella Genus LPS: High Structural Diversity and Heterogeneity -- 3.10.3 Lipid A -- 3.10.4 Cores -- 3.10.5 O-chains -- 3.10.6 Bordetella LPS Biological Activities -- 3.11 Other Examples of Heterogeneity and Diversity -- 3.11.1 Example: Salmonella minnesota R595 Re LPS Heterogeneity Shown by Thin Layer Chromatography (TLC), and Matrix Assisted Laser Desorption (MALDI) Mass Spectrometry -- 3.11.2 Example: Vibrio cholerae Lipid A Heterogeneity Shown by MALDI Mass Spectrometry -- 3.12 Conclusions -- References -- Chapter 4: Endotoxin in Microbiological Context -- 4.1 Early and Expanding Microbiological Context -- 4.2 Metazoan Receptors for Microbial PAMPs -- 4.3 Aseptic Processing, Bioburden and Endotoxin Hold Time Studies -- 4.4 Structural Context of LPS in the GNB OM -- 4.4.1 Modeling and Re-modeling of Membranes -- 4.4.2 Constituents of GNB Membranes and Action of Divalent Cations -- 4.4.3 Evolution of GNB OM -- 4.5 The Definition of Endotoxin -- 4.5.1 Biosynthesis of LPS -- 4.5.2 Reciprocal Specificity of the Host Response to LPS -- 4.6 Unique LPS Sugar Moieties by Which GNB Are Defined and Targeted -- 4.6.1 O-Antigen Serotyping -- 4.6.2 Bacteriophage Typing -- 4.6.3 Bacteriophage Transfer of Antibiotic Resistance Genes. , 4.7 LPS Aggregation and Activation of the Immune System -- 4.7.1 The Mueller Study -- 4.7.2 The Takayama Study -- 4.7.3 Refining the Questions -- 4.8 Asymmetry and Proportionality of LPS in GNB OM Structure -- 4.9 Non-LPS OM Constituents Are Dominated by Porins -- 4.9.1 Predominance of Porins -- 4.9.2 Porin Structure and Specificity Contrast LPS -- 4.9.3 Porin Host Reactivity -- 4.9.4 Porin Association with LPS -- 4.9.5 Porin Occurrence in Human Cells and Disease -- References -- Chapter 5: Endotoxin and Microbiological Control -- 5.1 Microbiological Control Mechanisms of Action -- 5.1.1 LPS contribution to OM Impermeability -- 5.1.2 Antibiotic/Antimicrobial Peptides -- 5.1.3 OMV Formation -- 5.1.4 Miscellaneous Perturbation -- 5.1.5 Disinfection -- 5.2 Glass, Increasing Control Requirements -- 5.3 Depyrogenation -- 5.3.1 Preclusion -- 5.3.2 Removal -- 5.3.2.1 Filtration -- 5.3.2.2 Two-Phase Micellar Solution -- 5.3.2.3 Hydrophobic Adsorption -- 5.3.2.4 Chromatography -- 5.3.2.5 Misc. Binding -- 5.3.3 Inactivation -- 5.3.3.1 Dry Heat -- 5.3.3.2 Chemical Methods -- 5.3.3.3 Plasma Gas -- 5.3.3.4 Radiation -- 5.4 Example Projects -- 5.4.1 Medical Devices -- 5.4.2 Nanoparticles -- 5.4.3 Purified Water -- 5.4.4 Biofilm Disruption -- References -- Chapter 6: Practical Limulus-Based Testing -- 6.1 Introduction: Why the Focus on Endotoxin? -- 6.2 Part I. A Well-Supported Test -- 6.2.1 Overview of the cGMP Environment -- 6.2.2 Lab Variability -- 6.2.3 Test Basics: Materials and Methods -- 6.2.4 Sampling and Storage -- 6.2.5 Endotoxin Standardization -- 6.2.6 Out with Old Guidance, in with New -- 6.2.7 Installing a New Test System in a cGMP Environment -- 6.2.7.1 What Steps Are Needed to Setup and Qualify a New Test System? -- 6.2.7.2 Test Type Overview -- 6.3 Part II. A Well-Developed Test -- 6.3.1 Developing a Drug Test. , 6.3.1.1 Calculations Based on Drug Dosage, Method Development Testing -- 6.3.2 Excipient Specifications to Support a Control Strategy -- 6.3.2.1 Calculations to Determine API, Excipient and Raw Material Specifications -- 6.3.2.2 Validation/Verification -- 6.3.2.3 Routine Test Protocol -- 6.4 Part III. A Well-Performed Test -- 6.4.1 The Analyst Test Interface -- 6.4.1.1 Software Template Setup -- 6.4.1.2 Preparation of the CSE/RSE and the Resulting Dilution Series -- 6.4.1.3 Preparation of the Sample -- 6.4.1.4 Addition of Spikes to the Plate -- 6.4.1.5 Addition of Solutions to the Plate -- 6.4.1.6 Hot and Cold Wells -- 6.4.1.7 Pre-incubation of the Plate -- 6.4.1.8 Addition of LAL/rFC to the Plate Containing Standards and Sample Dilutions -- 6.4.1.9 Result Calculation -- 6.4.1.10 Analyst Documentation of Test Performance -- 6.4.1.11 Post-test Activities (pH, Preservation of Sample for Retest or Resample) -- 6.4.1.12 Troubleshooting -- 6.4.1.13 Retest: Resample Performance -- 6.4.1.14 Beta Glucans -- References -- Chapter 7: Emerging Immune Context -- 7.1 Introduction -- 7.2 Emerging Immune Context -- 7.2.1 Immune Reactions Including Fever Are Common in Biologics Administration -- 7.2.2 IIRMI as a New Paradigm -- 7.2.3 Best Proof of Concept -- 7.3 Innate Activation of Adaptive Immunity -- 7.3.1 Microbiology Meets Immunology -- 7.3.2 Receptors and Markers Overview -- 7.3.2.1 CD Markers -- 7.3.2.2 Clonal Versus Non-clonal Receptors -- 7.3.2.3 Fc Receptors -- 7.3.3 PAMP Activation of Adaptive Immunity -- 7.3.3.1 The Second Signal -- 7.3.3.2 Licensing the Second Signal -- 7.4 A Simple Immunological Model for MCC -- 7.4.1 Explanatory Power of a Simple Model -- 7.4.2 Co- Receptor Modulation Is Inherent in Disease Causation as Well as the Mode of Action of Biologics Molecules -- 7.4.3 Action of Adjuvant Usage in Vaccinology. , 7.4.4 Suppression of Host Immunity by Pathogens Via Modulation of Receptors -- 7.5 Specific Ways Adaptive Immune Context Differs from Microbiological Context -- 7.5.1 Synergistic Contaminants -- 7.5.2 Relevant Levels Are Not Necessarily Pyrogenic Levels -- 7.5.3 Time Is a Factor -- 7.5.4 What Is the Meaning? -- 7.6 Milestone Publications in Bridging Innate and Adaptive Immunity -- Appendix I -- References -- Chapter 8: The Biologics Revolution and Endotoxin Test Concerns -- 8.1 Part I Biologics Overview -- 8.1.1 Introduction -- 8.1.2 Differences in Biologics Versus LVPs and SMDs -- 8.1.2.1 Large, Complex and Produced in Living Organisms -- 8.1.2.2 Produced via Recombinant Methods -- 8.1.2.3 Adverse Responses -- 8.1.2.4 The Process Is the Product -- 8.1.2.5 Based Upon Immune Modulation -- 8.1.2.6 Biologics Drug Classes -- 8.1.2.7 Clinical, Regulatory, Legal and Manufacturing Cost Differences -- 8.1.2.8 Require Additional Microbiological Control: Expression System Removal -- Microbial Mimetics Mimetics are not actual microbiological byproducts or cell constituents but rather process constituents that may be immune activating in the body, as surveilled by the immune system, and treated as if it were of a microbial na -- Host Cell Protein (HCP) Impurity Determination HCP removal is applicable to biologics as produced from living cells. As these cells grow and produce therapeutic proteins, they also produce other substances (simply by being alive, reproducing, etc. -- Nucleic Acid Removal According to Wang et al. [53] biologics production has some unique aspects of concern in the removal of nucleic acids, particularly residual DNA:. , Beta Glucans Fungal cell wall constituents, especially beta glucans, have come to be considered by many to be innate immune response modulating impurities (IIRMI) and should therefore be removed or precluded from biologics manufacturing processe.
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  • 2
    Online Resource
    Online Resource
    Milton :Taylor & Francis Group,
    Keywords: Limulus test. ; Electronic books.
    Description / Table of Contents: This source expertly examines the discovery, biological structure, control, and continued clarification of endotoxin from a parenteral manufacturing perspective, with in-depth discussion of state-of-the-art technologies involving Limulus amebocyte lysate (LAL) such as assay development, automation, depyrogenation. Completely revised and expanded, this Third Edition contains the knowledge necessary to apply endotoxin testing in the increasingly complex pharmaceutical environment, featuring sections detailing the latest information regarding clinical advances, regulation standards, and validation procedures for computerized kinetic tests.
    Type of Medium: Online Resource
    Pages: 1 online resource (441 pages)
    Edition: 3rd ed.
    ISBN: 9781420020595
    DDC: 615.95293
    Language: English
    Note: Front cover -- Preface -- Contents -- Contributors -- Chapter 1. Historical and Emerging Themes -- Chapter 2. Endotoxin Relevance and Control Overview -- Chapter 3. Fever and the Host Response -- Chapter 4. Endotoxin Structure, Function, and Activity -- Chapter 5. Descent of Limulus: Arthropoda and the New Biology -- Chapter 6. Microbial Biodiversity and Lipopolysaccharide Heterogeneity: from Static to Dynamic Models -- Chapter 7. Nonendotoxin Microbial Pyrogens: Lesser Endotoxins and Superantigens -- Chapter 8. Risk Assessment in Parenteral Manufacture -- Chapter 9. Endotoxin as a Standard -- Chapter 10. Mechanism, and Application -- Chapter 11. Development, Validation, and Regulation -- Chapter 12. The Pyrogen Test -- Chapter 13. Pyrogenicity Case Studies -- Chapter 14. Developing Specifications for Active Pharmaceutical Ingredients, Excipients, Raw Materials, Sterile Pharmacy Compounds, and Nutritional Supplements -- Chapter 15. Depyrogenation Validation, Pyroburden, and Endotoxin Removal -- Chapter 16. Automation, Process Analytical Technology, and Prospective Testing -- Chapter 17. Limulus Amebocyte Lysate Testing of Medical Devices -- Chapter 18. Receptors, Mediators, and Mechanisms Involved in Bacterial Sepsis and Septic Shock -- Index.
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  • 3
    Keywords: Microbiology ; Pharmaceutical Sciences/Technology ; Pharmaceutical technology ; Medical microbiology. ; Endotoxins analysis ; Clinical Chemistry Tests methods ; Biosensing Techniques methods ; Biological Assay methods ; Endotoxins immunology
    Description / Table of Contents: Introduction -- Section I Pharma -- Historical Perspectives -- Risk, Control and Compliance. -- Sterility and Beyond -- LVPs and SMDs -- Specification Determination -- Static and Dynamic Models (Biodiversity and Heterogeneity) -- Test Development and Validation -- Diminishing Analytics -- Control in Biologics Manufacture -- Depyrogenation and Medical Devices -- Nanoparticles / Problematic Drug Types -- New Frontiers -- Section II Limulus -- Evolution, a Living Fossil and Other Model Arthropods -- Water, Water Everywhere -- Survival and Mass Extinction Events -- Limulus Soup / Hemolymph -- Is Innate Modeling Enough? -- A Foreboding -- Section III Mammalian -- Innate is Inborn -- The Host Response: Fever and Inflammation -- . Parallel Immune Systems: Architecture and Mechanisms -- Structural Change is Functional Change (Hand in Glove) -- Endotoxin and Adjuvanticity in Vaccinology -- Advances in Diagnostics -- The Big S
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XI, 869 p. 427 illus., 349 illus. in color)
    Edition: 1st ed. 2019
    ISBN: 9783030171483
    Series Statement: Springer eBooks
    Language: English
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Geo-marine letters 16 (1996), S. 212-218 
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract A bottom-mounted sonar operating at 40 kHz has been used to measure the variation of bottom acoustic scattering over extended time intervals at two shallow sites as part of the Coastal Benthic Boundary Layer Special Research Project. The acoustic data were analyzed using a correlation method that measures the spatial and temporal dependence of benthic change. The rate of decorrelation was two orders of magnitude more rapid at a sandy site near Panama City, Florida, USA, than at a silty site in Eckernförde Bay, Germany, and both sites were characterized by hot spots or localized regions of activity.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2022-05-25
    Description: Author Posting. © Acoustical Society of America, 1997. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 102 (1997): 806-814, doi:10.1121/1.419906.
    Description: A previous study of high-frequency acoustic backscattering data collected at Eckernfoerde Bay, Germany revealed that scattering is mainly due to methane gas bubbles buried about a meter beneath the seafloor [Tang et al., J. Acoust. Soc. Am. 96, 2930–2936 (1994)]. A backscattering model was developed [Tang, Geo-Marine Lett. 16, 161–169 (1996)] where the gas bubbles were approximated by oblate spheroids. In this paper, a bistatic scattering model is proposed as an extension of the previously developed backscattering model. In this model, gas bubbles are again assumed to be oblate spheroids with varying aspect ratios and a single-scattering approximation is used. The model is compared to bistatic data acquired in Eckernfoerde Bay, Germany. In particular, the azimuthal dependence of the bistatic scattering strength predicted by the model is tested against experimental data and it is found that both the model and the bistatic scattering strength data exhibit a mild azimuthal dependence. Best agreement between model and data requires a 35% reduction in areal bubble density relative to that used in the backscattering model/data comparison. Possible reasons for this are discussed including multiple scattering effects.
    Description: This work is supported by the Coastal Benthic Boundary Layer Special Research Program, Office of Navel Research Grant No. N00014-95-1-G904.
    Keywords: Oceanographic regions ; Acoustic wave scattering ; Backscatter ; Bubbles ; Sediments ; Underwater sound
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 6
    Publication Date: 2020-07-28
    Description: A bottom-mounted, circularly scanning sonar was used to observe the methane-rich seafloor of Eckernforde Bay during the months of April and May in 1993, Event-like changes in the acoustic signal were observed and are shown to be caused by scatterers in the water column that are interpreted to be gas bubbles rising in columns having transverse dimensions 2-5 m. The events do not correlate with seafloor current stress, temperature, or refraction due to stratification, but a strong correlation is seen with pressure at the seafloor, consistent with gas ebullition due to pressure release. It is not possible to definitively exclude scattering from pelagic animals as the cause of these events, but the observed localization at a few spots on the seafloor appears to be inconsistent with the biological explanation. These data are insufficient to determine the flux of free methane, but bounds are estimated and suggestions are made for future measurements that could determine flux
    Type: Article , PeerReviewed
    Format: text
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