Author: Karl Kadish
Publisher: Elsevier
ISBN: 9780123932204
Category : Science
Languages : en
Pages : 332
Book Description
The Porphyrin Handbook, Volume 16: Phthalocyanines: Spectroscopic and Electrochemical Characterization provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the photophysical properties of phthalocyanines that are important in relation to photosensitizers in photodynamic therapy, photoconductor, solar cells, and artificial photosynthesis. This text then describe how the data obtained from magnetic circular dichroism spectroscopy has provided the critical information required to describe the excited and ground state degeneracies of main group metallophthalocyanines complexes. Other chapters consider the electrocatalysis by electrodes modified with phthalocyanine sensors and complexes. This book discusses as well the properties of phthalocyanines and of their complexes. The final chapter deals with the experiments with organic pigment thin films. This book is a valuable resource for research scientists, engineers, and clinicians.
The Porphyrin Handbook
Author: Karl Kadish
Publisher: Elsevier
ISBN: 9780123932204
Category : Science
Languages : en
Pages : 332
Book Description
The Porphyrin Handbook, Volume 16: Phthalocyanines: Spectroscopic and Electrochemical Characterization provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the photophysical properties of phthalocyanines that are important in relation to photosensitizers in photodynamic therapy, photoconductor, solar cells, and artificial photosynthesis. This text then describe how the data obtained from magnetic circular dichroism spectroscopy has provided the critical information required to describe the excited and ground state degeneracies of main group metallophthalocyanines complexes. Other chapters consider the electrocatalysis by electrodes modified with phthalocyanine sensors and complexes. This book discusses as well the properties of phthalocyanines and of their complexes. The final chapter deals with the experiments with organic pigment thin films. This book is a valuable resource for research scientists, engineers, and clinicians.
Publisher: Elsevier
ISBN: 9780123932204
Category : Science
Languages : en
Pages : 332
Book Description
The Porphyrin Handbook, Volume 16: Phthalocyanines: Spectroscopic and Electrochemical Characterization provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the photophysical properties of phthalocyanines that are important in relation to photosensitizers in photodynamic therapy, photoconductor, solar cells, and artificial photosynthesis. This text then describe how the data obtained from magnetic circular dichroism spectroscopy has provided the critical information required to describe the excited and ground state degeneracies of main group metallophthalocyanines complexes. Other chapters consider the electrocatalysis by electrodes modified with phthalocyanine sensors and complexes. This book discusses as well the properties of phthalocyanines and of their complexes. The final chapter deals with the experiments with organic pigment thin films. This book is a valuable resource for research scientists, engineers, and clinicians.
The Porphyrin Handbook
Author: Karl Kadish
Publisher: Elsevier
ISBN: 0080923887
Category : Science
Languages : en
Pages : 388
Book Description
The Porphyrin Handbook, Volume 14: Medical Aspects of Porphyrins provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into 12 chapters, this volume begins with an overview of the underlying diagnostic features, mechanisms, and available treatments of erythropoietic disorders due to defective heme biosynthesis. This text then examines the physiopathology of acute intermittent porphyria, which is transmitted as autosomal dominant disorders with incomplete penetrance. Other chapters consider the main characteristics of congenital erythropoietic porphyria, which includes an increased synthesis, accumulation, ad excretion of porphyrins. This book discusses as well the biochemistry, pathophysiology, and clinical features of variegate porphyria in the light of several essential advances in the understanding, management, and diagnosis of variegate porphyria. The final chapter deals with the legal use of herbal and complementary medicines. This book is a valuable resource for research scientists, engineers, and clinicians.
Publisher: Elsevier
ISBN: 0080923887
Category : Science
Languages : en
Pages : 388
Book Description
The Porphyrin Handbook, Volume 14: Medical Aspects of Porphyrins provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into 12 chapters, this volume begins with an overview of the underlying diagnostic features, mechanisms, and available treatments of erythropoietic disorders due to defective heme biosynthesis. This text then examines the physiopathology of acute intermittent porphyria, which is transmitted as autosomal dominant disorders with incomplete penetrance. Other chapters consider the main characteristics of congenital erythropoietic porphyria, which includes an increased synthesis, accumulation, ad excretion of porphyrins. This book discusses as well the biochemistry, pathophysiology, and clinical features of variegate porphyria in the light of several essential advances in the understanding, management, and diagnosis of variegate porphyria. The final chapter deals with the legal use of herbal and complementary medicines. This book is a valuable resource for research scientists, engineers, and clinicians.
The Porphyrin Handbook
Author: Karl Kadish
Publisher: Academic Press
ISBN: 9780123932280
Category : Science
Languages : en
Pages : 392
Book Description
The Porphyrin Handbook, Volume 18: Multiporphyrins, Multiphthalocyanines and Arrays provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the results obtained in the research concerning the properties and formation of a class of metal phthalocyanine derivatives containing of two macrocyclic units. This text then examines the luminescence and photophysical data of multiporphyrin systems in which the chromophore centers are held together by weak, medium, or strong bonding interactions. Other chapters consider the intensive electronic absorption and circular dichroism properties of chiral phthalocyanines. This book discusses as well the chemistry porphyrin and corrin systems. The final chapter deals with geoporphyrins or sedimentary porphyrins, which are the most abundant porphyrin derivatives on earth. This book is a valuable resource for research scientists, engineers, and clinicians.
Publisher: Academic Press
ISBN: 9780123932280
Category : Science
Languages : en
Pages : 392
Book Description
The Porphyrin Handbook, Volume 18: Multiporphyrins, Multiphthalocyanines and Arrays provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the results obtained in the research concerning the properties and formation of a class of metal phthalocyanine derivatives containing of two macrocyclic units. This text then examines the luminescence and photophysical data of multiporphyrin systems in which the chromophore centers are held together by weak, medium, or strong bonding interactions. Other chapters consider the intensive electronic absorption and circular dichroism properties of chiral phthalocyanines. This book discusses as well the chemistry porphyrin and corrin systems. The final chapter deals with geoporphyrins or sedimentary porphyrins, which are the most abundant porphyrin derivatives on earth. This book is a valuable resource for research scientists, engineers, and clinicians.
Handbook of Porphyrin Science: with Applications to Chemistry, Physics, Materials Science, Engineering, Biology and Medicine (volume 5)
Author: Karl M. Kadish
Publisher: World Scientific
ISBN:
Category : Medical
Languages : en
Pages : 368
Book Description
This is the first set of Handbook of Porphyrin Science.Porphyrins, phthalocyanines and their numerous analogues and derivatives are materials of tremendous importance in chemistry, materials science, physics, biology and medicine. They are the red color in blood (heme) and the green in leaves (chlorophyll); they are also excellent ligands that can coordinate with almost every metal in the Periodic Table. Grounded in natural systems, porphyrins are incredibly versatile and can be modified in many ways; each new modification yields derivatives demonstrated new chemistry, physics and biology, with a vast array of medicinal and technical applications.As porphyrins are currently employed as platforms for study of theoretical principles and applications in a wide variety of fields, the Handbook of Porphyrin Science represents a timely ongoing series dealing in detail with the synthesis, chemistry, physicochemical and medical properties and applications of polypyrrole macrocycles. Professors Karl Kadish, Kevin Smith and Roger Guilard are internationally recognized experts in the research field of porphyrins, each having his own separate area of expertise in the field. Between them, they have published over 1500 peer-reviewed papers and edited more than three dozen books on diverse topics of porphyrins and phthalocyanines. In assembling the new volumes of this unique Handbook, they have selected and attracted the very best scientists in each sub-discipline as contributing authors of the chaptersThis Handbook will prove to be a modern authoritative treatise on the subject as it is a collection of up-to-date works by world-renowned experts in the field. Complete with hundreds of figures, tables and structural formulas, and thousands of literature citations, all researchers and graduate students in this field will find the Handbook of Porphyrin Science an essential, major reference source for many years to come.
Publisher: World Scientific
ISBN:
Category : Medical
Languages : en
Pages : 368
Book Description
This is the first set of Handbook of Porphyrin Science.Porphyrins, phthalocyanines and their numerous analogues and derivatives are materials of tremendous importance in chemistry, materials science, physics, biology and medicine. They are the red color in blood (heme) and the green in leaves (chlorophyll); they are also excellent ligands that can coordinate with almost every metal in the Periodic Table. Grounded in natural systems, porphyrins are incredibly versatile and can be modified in many ways; each new modification yields derivatives demonstrated new chemistry, physics and biology, with a vast array of medicinal and technical applications.As porphyrins are currently employed as platforms for study of theoretical principles and applications in a wide variety of fields, the Handbook of Porphyrin Science represents a timely ongoing series dealing in detail with the synthesis, chemistry, physicochemical and medical properties and applications of polypyrrole macrocycles. Professors Karl Kadish, Kevin Smith and Roger Guilard are internationally recognized experts in the research field of porphyrins, each having his own separate area of expertise in the field. Between them, they have published over 1500 peer-reviewed papers and edited more than three dozen books on diverse topics of porphyrins and phthalocyanines. In assembling the new volumes of this unique Handbook, they have selected and attracted the very best scientists in each sub-discipline as contributing authors of the chaptersThis Handbook will prove to be a modern authoritative treatise on the subject as it is a collection of up-to-date works by world-renowned experts in the field. Complete with hundreds of figures, tables and structural formulas, and thousands of literature citations, all researchers and graduate students in this field will find the Handbook of Porphyrin Science an essential, major reference source for many years to come.
The Porphyrin Handbook
Author: Karl Kadish
Publisher: Elsevier
ISBN: 9780123932297
Category : Science
Languages : en
Pages : 238
Book Description
The Porphyrin Handbook, Volume 19: Applications of Phthalocyanines provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the basic photobiology of phthalocyanines, their structure-activity relationships, mechanisms of action in a variety of biological systems, and their potential applications for various medical purposes. This text then examines the type of organization of the molecules in the solid state and the intensity of the intermolecular interactions. Other chapters consider the applications of phthalocyanines as decorative and functional materials, with emphasis on properties and structures of phthalocyanines with industrial relevance. This book discusses as well the enzyme-like catalytic functions of metal complexes derivatives and their practical applications as odor-removing systems and bacterial systems based on their effective catalytic activities. This book is a valuable resource for research scientists, engineers, and clinicians.
Publisher: Elsevier
ISBN: 9780123932297
Category : Science
Languages : en
Pages : 238
Book Description
The Porphyrin Handbook, Volume 19: Applications of Phthalocyanines provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the basic photobiology of phthalocyanines, their structure-activity relationships, mechanisms of action in a variety of biological systems, and their potential applications for various medical purposes. This text then examines the type of organization of the molecules in the solid state and the intensity of the intermolecular interactions. Other chapters consider the applications of phthalocyanines as decorative and functional materials, with emphasis on properties and structures of phthalocyanines with industrial relevance. This book discusses as well the enzyme-like catalytic functions of metal complexes derivatives and their practical applications as odor-removing systems and bacterial systems based on their effective catalytic activities. This book is a valuable resource for research scientists, engineers, and clinicians.
The Porphyrin Handbook, Volumes 11-20
Author: Karl Kadish
Publisher: Academic Press
ISBN: 9780123932204
Category : Science
Languages : en
Pages : 3310
Book Description
Announcing the sequel to the first ten volumes of The Porphyrin Handbook, which provided an authoritative treatise on the porphryin system and dealt in fine detail with the synthesis, chemistry, spectroscopy, and applications of porphyrins. The ten latest volumes 11-20 address those major disciplinary areas not covered in the first, including biology and medical implications of porphyrin systems, the biosynthesis of porphyrins, chlorophylls and vitamin B12. Other areas include the multitude of genetically transmitted and drug induced diseases associated with errors in heme metabolism, the transformations of hemes into bile pigments, the organic syntheses of bilins, very recent work on phytochrome, and the pathways of degradation of chlorophyll in senescent plants. In addition, volumes 11-20 address every aspect of synthesis, chemistry, structure and spectroscopy of phthalocyanines which will appeal to scientists in fields ranging from mathematics through physics, chemistry and biochemistry, to biology and medicine. . By the same Editors as the successful first Porphyrin Handbook, published in 2000. . Consists of 61 chapters written by internationally recognized experts. . Clear, concise, and uniform presentation with many hundreds of figures, tables and structural formulae. Including volume indices and cumulative index.
Publisher: Academic Press
ISBN: 9780123932204
Category : Science
Languages : en
Pages : 3310
Book Description
Announcing the sequel to the first ten volumes of The Porphyrin Handbook, which provided an authoritative treatise on the porphryin system and dealt in fine detail with the synthesis, chemistry, spectroscopy, and applications of porphyrins. The ten latest volumes 11-20 address those major disciplinary areas not covered in the first, including biology and medical implications of porphyrin systems, the biosynthesis of porphyrins, chlorophylls and vitamin B12. Other areas include the multitude of genetically transmitted and drug induced diseases associated with errors in heme metabolism, the transformations of hemes into bile pigments, the organic syntheses of bilins, very recent work on phytochrome, and the pathways of degradation of chlorophyll in senescent plants. In addition, volumes 11-20 address every aspect of synthesis, chemistry, structure and spectroscopy of phthalocyanines which will appeal to scientists in fields ranging from mathematics through physics, chemistry and biochemistry, to biology and medicine. . By the same Editors as the successful first Porphyrin Handbook, published in 2000. . Consists of 61 chapters written by internationally recognized experts. . Clear, concise, and uniform presentation with many hundreds of figures, tables and structural formulae. Including volume indices and cumulative index.
Main Group Strategies towards Functional Hybrid Materials
Author: Thomas Baumgartner
Publisher: John Wiley & Sons
ISBN: 1119235979
Category : Science
Languages : en
Pages : 557
Book Description
Showcases the highly beneficial features arising from the presence of main group elements in organic materials, for the development of more sophisticated, yet simple advanced functional materials Functional organic materials are already a huge area of academic and industrial interest for a host of electronic applications such as Organic Light-Emitting Diodes (OLEDs), Organic Photovoltaics (OPVs), Organic Field-Effect Transistors (OFETs), and more recently Organic Batteries. They are also relevant to a plethora of functional sensory applications. This book provides an in-depth overview of the expanding field of functional hybrid materials, highlighting the incredibly positive aspects of main group centers and strategies that are furthering the creation of better functional materials. Main Group Strategies towards Functional Hybrid Materials features contributions from top specialists in the field, discussing the molecular, supramolecular and polymeric materials and applications of boron, silicon, phosphorus, sulfur, and their higher homologues. Hypervalent materials based on the heavier main group elements are also covered. The structure of the book allows the reader to compare differences and similarities between related strategies for several groups of elements, and to draw crosslinks between different sections. The incorporation of main group elements into functional organic materials has emerged as an efficient strategy for tuning materials properties for a wide range of practical applications Covers molecular, supramolecular and polymeric materials featuring boron, silicon, phosphorus, sulfur, and their higher homologues Edited by internationally leading researchers in the field, with contributions from top specialists Main Group Strategies towards Functional Hybrid Materials is an essential reference for organo-main group chemists pursuing new advanced functional materials, and for researchers and graduate students working in the fields of organic materials, hybrid materials, main group chemistry, and polymer chemistry.
Publisher: John Wiley & Sons
ISBN: 1119235979
Category : Science
Languages : en
Pages : 557
Book Description
Showcases the highly beneficial features arising from the presence of main group elements in organic materials, for the development of more sophisticated, yet simple advanced functional materials Functional organic materials are already a huge area of academic and industrial interest for a host of electronic applications such as Organic Light-Emitting Diodes (OLEDs), Organic Photovoltaics (OPVs), Organic Field-Effect Transistors (OFETs), and more recently Organic Batteries. They are also relevant to a plethora of functional sensory applications. This book provides an in-depth overview of the expanding field of functional hybrid materials, highlighting the incredibly positive aspects of main group centers and strategies that are furthering the creation of better functional materials. Main Group Strategies towards Functional Hybrid Materials features contributions from top specialists in the field, discussing the molecular, supramolecular and polymeric materials and applications of boron, silicon, phosphorus, sulfur, and their higher homologues. Hypervalent materials based on the heavier main group elements are also covered. The structure of the book allows the reader to compare differences and similarities between related strategies for several groups of elements, and to draw crosslinks between different sections. The incorporation of main group elements into functional organic materials has emerged as an efficient strategy for tuning materials properties for a wide range of practical applications Covers molecular, supramolecular and polymeric materials featuring boron, silicon, phosphorus, sulfur, and their higher homologues Edited by internationally leading researchers in the field, with contributions from top specialists Main Group Strategies towards Functional Hybrid Materials is an essential reference for organo-main group chemists pursuing new advanced functional materials, and for researchers and graduate students working in the fields of organic materials, hybrid materials, main group chemistry, and polymer chemistry.
Functional Organic Liquids
Author: Takashi Nakanishi
Publisher: John Wiley & Sons
ISBN: 3527341900
Category : Technology & Engineering
Languages : en
Pages : 292
Book Description
The first book to comprehensively cover the burgeoning new class of soft materials known as functional organic liquids Functional organic liquids, a new concept in soft matter materials science, exhibit favorable properties compared to amorphous polymers and ionic liquids. They are composed of a functional core unit and a side chain, which induces fluidity even at room temperature. Due to their fluidity, functional organic liquids can adopt any shape and geometry and fulfill their function in stretchable and bendable devices for applications in photovoltaics, organic electronics, biomedicine, and biochemistry. Presented in five parts, this book starts with an overview of the design methods and properties of functional organic liquids. The next three parts focus on the applications of this exciting new class of soft materials in the fields of energy conversion, nanotechnology, and biomaterials. They study the liquids for energy conversion, those containing inorganic nanoclusters, and solvent-free soft biomaterials. Functional Organic Liquids concludes with a comparison in terms of properties and application potential between functional organic liquids and more conventional soft matter such as ionic liquids and liquid metals. -Examines the current state of science and technology for functional organic liquids -Focuses on potential and already realized applications such as functional organic liquids for energy conversion -Stimulates researchers to move forward on future development and applications Functional Organic Liquids is an excellent book for materials scientists, polymer chemists, organic chemists, physical chemists, surface chemists, and surface physicists.
Publisher: John Wiley & Sons
ISBN: 3527341900
Category : Technology & Engineering
Languages : en
Pages : 292
Book Description
The first book to comprehensively cover the burgeoning new class of soft materials known as functional organic liquids Functional organic liquids, a new concept in soft matter materials science, exhibit favorable properties compared to amorphous polymers and ionic liquids. They are composed of a functional core unit and a side chain, which induces fluidity even at room temperature. Due to their fluidity, functional organic liquids can adopt any shape and geometry and fulfill their function in stretchable and bendable devices for applications in photovoltaics, organic electronics, biomedicine, and biochemistry. Presented in five parts, this book starts with an overview of the design methods and properties of functional organic liquids. The next three parts focus on the applications of this exciting new class of soft materials in the fields of energy conversion, nanotechnology, and biomaterials. They study the liquids for energy conversion, those containing inorganic nanoclusters, and solvent-free soft biomaterials. Functional Organic Liquids concludes with a comparison in terms of properties and application potential between functional organic liquids and more conventional soft matter such as ionic liquids and liquid metals. -Examines the current state of science and technology for functional organic liquids -Focuses on potential and already realized applications such as functional organic liquids for energy conversion -Stimulates researchers to move forward on future development and applications Functional Organic Liquids is an excellent book for materials scientists, polymer chemists, organic chemists, physical chemists, surface chemists, and surface physicists.
The Porphyrin Handbook
Author: Karl Kadish
Publisher: Academic Press
ISBN: 0123932254
Category : Science
Languages : en
Pages : 406
Book Description
The Porphyrin Handbook, Volume 15: Phthalocyanines: Synthesis provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the importance of compounds such as heme and chlorophyll that play vital roles in the biological systems responsible for the transportation of oxygen to cells in the body. This text then explores the different methods used for the preparation of phthalocyanine and its metallated derivatives. Other chapters consider the detailed survey of phthalocyanine formation, characterization, and purification. This book discusses as well the synthesis of low-symmetry phthalocyanines and related compounds. The final chapter deals with a survey of the structure, synthesis, and physiochemical properties of porphyrazines with annulated heterocycles. This book is a valuable resource for research scientists, engineers, and clinicians.
Publisher: Academic Press
ISBN: 0123932254
Category : Science
Languages : en
Pages : 406
Book Description
The Porphyrin Handbook, Volume 15: Phthalocyanines: Synthesis provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the importance of compounds such as heme and chlorophyll that play vital roles in the biological systems responsible for the transportation of oxygen to cells in the body. This text then explores the different methods used for the preparation of phthalocyanine and its metallated derivatives. Other chapters consider the detailed survey of phthalocyanine formation, characterization, and purification. This book discusses as well the synthesis of low-symmetry phthalocyanines and related compounds. The final chapter deals with a survey of the structure, synthesis, and physiochemical properties of porphyrazines with annulated heterocycles. This book is a valuable resource for research scientists, engineers, and clinicians.
Harderian Glands
Author: Susan M. Webb
Publisher: Springer Science & Business Media
ISBN: 3642766854
Category : Medical
Languages : en
Pages : 330
Book Description
Harderian glands, first described by Jacob Harder in two species of deer in 1694, are large, intraorbital glands which, with but few exceptions, are found in all land vertebrates. Certainly, their relatively large size, their phylogenetic age, and persistent conservation in all groups as they emerged from an aqueous to an air/land environment lend strong support to the logical deduction that they probably play an important role in the physiological adaptation to terrestrial life. Yet, few biologists know even what or where these glands are. For a variety of reasons, the Harderian glands have not received the attention they deserve and, as a result, the published works available have been scarce and scattered throughout the world literature. The current situation is remarkably similar to that which existed in regard to the pineal gland prior to the mid-1960s, i. e. , scattered literature, unknown function, few investigators, and little interest. Yet, following a few key papers, interest in the pineal gland expanded and soon an explosive increase in the knowledge and understanding of the pineal gland took place and continues today. Will history repeat itself? Originally, a few of us discussed the desirability of an informal Symposium on the Harderian glands.
Publisher: Springer Science & Business Media
ISBN: 3642766854
Category : Medical
Languages : en
Pages : 330
Book Description
Harderian glands, first described by Jacob Harder in two species of deer in 1694, are large, intraorbital glands which, with but few exceptions, are found in all land vertebrates. Certainly, their relatively large size, their phylogenetic age, and persistent conservation in all groups as they emerged from an aqueous to an air/land environment lend strong support to the logical deduction that they probably play an important role in the physiological adaptation to terrestrial life. Yet, few biologists know even what or where these glands are. For a variety of reasons, the Harderian glands have not received the attention they deserve and, as a result, the published works available have been scarce and scattered throughout the world literature. The current situation is remarkably similar to that which existed in regard to the pineal gland prior to the mid-1960s, i. e. , scattered literature, unknown function, few investigators, and little interest. Yet, following a few key papers, interest in the pineal gland expanded and soon an explosive increase in the knowledge and understanding of the pineal gland took place and continues today. Will history repeat itself? Originally, a few of us discussed the desirability of an informal Symposium on the Harderian glands.