The Ocular Circulation

The Ocular Circulation

Author: Jeffrey W. Kiel

Publisher: Biota Publishing

Published: 2011-02-01

Total Pages: 83

ISBN-13: 1615041699

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This presentation describes the unique anatomy and physiology of the vascular beds that serve the eye. The needs for an unobstructed light path from the cornea to the retina and a relatively fixed corneal curvature and distance between refractive structures pose significant challenges for the vasculature to provide nutrients and remove metabolic waste. To meet these needs, the ocular vascular beds are confined to the periphery of the posterior two thirds of the eye and a surrogate circulation provides a continuous flow of aqueous humor to nourish the avascular cornea, lens and vitreous compartment. The production of aqueous humor (and its ease of egress from the eye) also generates the intraocular pressure (IOP), which maintains the shape of the eye. However, the IOP also exerts a compressing force on the ocular blood vessels that is higher than elsewhere in the body. This is particularly true for the intraocular veins, which must have a pressure higher than IOP to remain patent, and so the IOP is the effective venous pressure for the intraocular vascular beds. Consequently, the ocular circulation operates at a lower perfusion pressure gradient than elsewhere in the body and is more at risk for ischemic damage when faced with low arterial pressure, particularly if IOP is elevated. This risk and the specialized tissues of the eye give rise to the fascinating physiology of the ocular circulations.


Pharmacologic Therapy of Ocular Disease

Pharmacologic Therapy of Ocular Disease

Author: Scott M. Whitcup

Publisher: Springer

Published: 2017-06-05

Total Pages: 388

ISBN-13: 3319582909

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There have been major advancements in the pharmacologic treatment of eye diseases over the past decade. With newly discovered disease targets and novel approaches to deliver therapeutic compounds to the eye, patients are seeing improved outcomes. Not only are there better treatments for diseases where treatments existed, we now have effective therapy for previously untreatable and blinding eye disorders. This volume will cover the pharmacologic treatment of eye diseases from the front of the eye including eyelids, conjunctiva and cornea all the way back to the retina and optic nerve. The first section of the volume reviews general principles of ocular pharmacology, pharmacokinetics, pharmaceutical sciences, and drug delivery. In addition, the volume provides an up to date guide to the pharmacologic approach to the key eye diseases that threaten sight or ocular function.


Advances in Probiotics

Advances in Probiotics

Author: Dharumadurai Dhanasekaran

Publisher: Academic Press

Published: 2021-07-15

Total Pages: 568

ISBN-13: 0128230916

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Advances in Probiotics: Microorganisms in Food and Health highlights recent advances in probiotic microorganisms, commercial probiotics, safety aspects of probiotics, preparation and commercialization, microbiome therapy for diseases and disorders, and next generation probiotics. This is a comprehensive resource of developments of new formulations and products for probiotic and prebiotic food with focus on the microorganisms to enable effective probiotic delivery. The book deliberates contemporary trends and challenges, risks, limitations in probiotic and prebiotic food to deliver an understanding not only for research development purposes but also to benefit further standardize industrial requirements and other techno-functional traits of probiotics. At present there is no solitary volume to describe the probiotics and prebiotics properties, Advances in Probiotics: Microorganisms in Food and Health provides novel information to fill the overall gap in the market. It presents the most current information on probiotic and prebiotics for the food industry. This book is a valuable resource for academicians, researchers, food industrialists, and entrepreneurs. - Presents a simulated gastrointestinal system to analyze the probiotics effects on gut microbiome for learning purpose - Includes research information on Next Generation Probiotics to foster new formulations - Provides comprehensive information on probiotic microorganism behavior for more accurate analysis - Discusses the potential of probiotic and prebiotic foods in preventing disease


Retinal Degenerations

Retinal Degenerations

Author: Matthew M. LaVail

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 458

ISBN-13: 1461500672

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The topics in this volume explore the etiology, cellular mechanisms, epidemiology, genetics, models and potential therapeutic measures for the blinding diseases of retinitis pigmentosa and age-related macular degeneration. Special focus is highlighted in the areas of Mechanisms of Photoreceptor Degeneration and Cell Death (extremely important because very little is known how or why photoreceptors die in these diseases, despite an abundance of genetic information), Age-Related Macular Degeneration (with several novel approaches to its analysis), Usher Syndrome (the most severe form of retinitis pigmentosa, which includes an early or congenital loss of hearing along with blindness), and Gene Therapy. In addition, the section on Basic Science Related to Retinal Degeneration is particularly strong with several laboratories reporting on new discoveries in the area of outer segment phagocytosis, a key component of photoreceptor-retinal pigment epithelial cell interactions in normal and degenerating retinas.


Neuroscience

Neuroscience

Author: Dale Purves

Publisher: Sinauer Associates Incorporated

Published: 2004-01-01

Total Pages: 773

ISBN-13: 9780878937257

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Neuroscience is a comprehensive textbook created primarily for medical and premedical students; it emphasises the structure of the nervous system, the correlation of structure and function, and the structure/function relationships particularly pertinent to the practice of medicine. Although not primarily about pathology, the book includes the basis of a variety of neurological disorders. It could serve equally well as a text for undergraduate neuroscience courses in which many of the students are premeds. Being both comprehensive and authoritative, it is also appropriate for graduate and professional use. The new edition offers a host of new features including a new art program and the completely revised Sylvius for Neuroscience: Visual Glossary of Human Neuroanatomy, an interactive CD-ROM reference guide to the human nervous system. Major changes to the new edition also include: additional neuroanatomical content, including two appendices-(1) The Brainstem and Cranial Nerves and (2) Vascular Supply, the Meninges, and the Ventricular System; and updated and new boxes on neurological and psychiatric diseases.


Chemotherapy-Induced Neuropathic Pain

Chemotherapy-Induced Neuropathic Pain

Author: Robert B. Raffa

Publisher: CRC Press

Published: 2012-07-24

Total Pages: 225

ISBN-13: 1439862192

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There have been tremendous recent advances in the pharmacotherapy, dose regimens, and combinations used to treat cancer and for the treatment or prevention of the spread of disease. As a direct result of these advances, there are an increasing number of cancer survivors, although research dealing with chemotherapy-induced pain is still in its early


Fascinating Facts About Phytonutrients in Spices and Healthy Food

Fascinating Facts About Phytonutrients in Spices and Healthy Food

Author: Louis S. Premkumar

Publisher: Xlibris Corporation

Published: 2014-03-25

Total Pages: 247

ISBN-13: 1493150022

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For centuries, there have been claims that healthy food garnished with exotic spices and condiments provides vital nutrients that help ward off diseases, especially preventable diseases such as diabetes and heart disease (hypertension, coronary artery disease) and promote longevity. The purpose of writing this book is to update the public about the health benefits of ingredients (phytochemicals) in spices and healthy food using existing scientific evidence. The ultimate proof of health benefits will be deciphered by the isolation and identification of specific phytochemicals acting on specific receptors in the body exerting their biological effects. The important point being emphasized is that if the physiological effect of an ingredient is glaring, it is considered to elicit a significant response. However, when the effect of an ingredient is significant, yet the effect is not readily perceivable then the usefulness goes unnoticed and can be questioned as a myth. For example, coffee has several ingredients, but only caffeine acting on the adenosine receptors stimulates the central nervous system and promotes wakefulness. Similarly, the specific active ingredient in hot chili pepper, capsaicin, activates a member of a recently identified family of receptors called transient receptor potential (TRP) channels. TRP vanilloid 1 (TRPV1), which is involved in certain modalities of pain, promotes the release of hormones in the gastrointestinal (GI) tract. Although, the bioavailability of the active ingredients is low, it is important to realize that these ingredients can cause significant local effects in the GI tract by preventing cholesterol regeneration by subduing microbiota, inhibiting precancerous growth by promoting calcium influx and stimulating nerve endings to transmit information and to release of gut hormones that are involved in regulating a variety of functions including appetite and satiety.


Targeted Drug Delivery : Concepts and Design

Targeted Drug Delivery : Concepts and Design

Author: Padma V. Devarajan

Publisher: Springer

Published: 2014-12-08

Total Pages: 788

ISBN-13: 3319113550

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This authoritative volume explores the fundamental concepts and numerous applications of targeted delivery of drugs to the body. This compilation has been divided into eight sections comprised of the basic principles of drug targeting, disease and organ/organelle-based targeting, passive and active targeting strategies, and various advanced drug delivery tools such as functionalized lipidic, polymeric and inorganic nanocarriers. Together, the twenty-three chapters cover a wide range of topics in the field, including tumor and hepatic targeting, polymer-drug conjugates, nanoemulsion, physical and biophysical characteristics of nanoparticles, and in vivo imaging techniques, among others. The book also examines advanced characterization techniques, regulatory hurdles and toxicity-related issues that are key features for successful commercialization of targeted drug delivery system products. Targeted Drug Delivery is a comprehensive reference guide for drug delivery researchers, both beginners and those already working in the field.


Dorland's Dictionary of Medical Acronyms and Abbreviations

Dorland's Dictionary of Medical Acronyms and Abbreviations

Author: Dorland

Publisher: Elsevier Health Sciences

Published: 2015-07-24

Total Pages: 481

ISBN-13: 0323442544

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Medical acronyms and abbreviations offer convenience, but those countless shortcuts can often be confusing. Now a part of the popular Dorland's suite of products, this reference features thousands of terms from across various medical specialties. Its alphabetical arrangement makes for quick reference, and expanded coverage of symbols ensures they are easier to find. Effective communication plays an important role in all medical settings, so turn to this trusted volume for nearly any medical abbreviation you might encounter. - Symbols section makes it easier to locate unusual or seldom-used symbols. - Convenient alphabetical format allows you to find the entry you need more intuitively. - More than 90,000 entries and definitions. - Many new and updated entries including terminology in expanding specialties, such as Nursing; Physical, Occupational, and Speech Therapies; Transcription and Coding; Computer and Technical Fields. - New section on abbreviations to avoid, including Joint Commission abbreviations that are not to be used. - Incorporates updates suggested by the Institute for Safe Medication Practices (ISMP).