Molecular mechanisms of body water homeostasis / / Carolyn M. Ecelbarger, Dharmendra Kumar Chaudhary, Hwal Lee, Swasti Tiwari

• Record Nr.: UNINA9910153635703321
• Autore: Ecelbarger Carolyn M.
• Pubbl/distr/stampa: [San Rafael, California] : , : Morgan & Claypool, , 2017
• ISBN: 1-61504-733-6
• Descrizione fisica: 1 online resource (112 pages) : color illustrations
• Collana: Colloquium series on integrated systems physiology, , 2154-5626 ; ; # 68
• Disciplina: 572.3
• Soggetti: Osmoregulation; Water in the body; Body Water
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Part of: Colloquium digital library of life sciences.
• Nota di bibliografia: Includes bibliographical references (pages 75-97).
• Nota di contenuto: 1. Water, water everywhere -- 1.1 Chapter overview -- 1.2 Body water composition -- 1.2.1 Changes in water homeostasis over the lifespan -- 1.2.2 Body water intake requirements -- 1.3 Measurement of total body water (TBW) -- 1.3.1 Body water compartmentalization -- 1.4 Dehydration -- 1.4.1 Exercise and water requirements -- 1.5 Environmental modulators of body water composition -- 1.5.1 High altitude -- 1.5.2 Extremes in temperature or humidity -- 1.5.3 Dietary alterations --; 2. The brain, AVP, and water balance -- 2.1 Chapter overview -- 2.2 The brain -- 2.3 Vasopressin and related neuropeptides -- 2.3.1 Regulation of vasopressin production and release -- 2.4 Vasopressin receptors -- 2.4.1 Receptor cloning -- 2.4.2 Receptor activation and signaling -- 2.4.3 Receptor localization -- 2.5 Vasopressin actions -- 2.5.1 Vasopressin and glomerular filtration rate (GFR) -- 2.5.2 Vasopressin and blood pressure control -- 2.5.2.1 AVPR2 are coupled to nitric oxide generation -- 2.5.2.2 Hypertension may correlate with urinary concentrating ability --; 3. Renal control of water reabsorption -- 3.1 Chapter overview -- 3.2 Blood filtration -- 3.3 The countercurrent multiplier mechanism -- 3.3.1 The Na-K-2Cl cotransporter (NKCC2) -- 3.3.2 Gradient in the inner medulla -- 3.4 The collecting duct -- 3.5 Urea transporters -- ; 3.6 Renal aquaporins -- 3.6.1 Aquaporin 1 -- 3.6.2 Aquaporin 2 -- 3.6.2.1 Short-term AQP2 regulation -- 3.6.2.2 Long-term AQP2 regulation -- 3.6.2.3 Regulators of AQP2 -- 3.6.3 Aquaporins 3 and 4 -- 3.6.4 Other aquaporins --; 4. Hyponatremia -- 4.1 Chapter overview -- 4.2 Causes and forms of hyponatremia -- 4.3 Hyponatremia and the brain -- 4.4 Hyponatremia and bone health -- 4.5 The syndrome of inappropriate antidiuretic hormone (SIADH) -- 4.5.1 Exercise-induced hyponatremia -- 4.6 Vasopressin escape and molecular mechanismS -- 4.7 Therapies/interventions --; 5. Diabetes insipidus -- 5.1 Chapter overview -- 5.2 Central diabetes insipidus (CDI) -- 5.3 Nephrogenic diabetes insipidus (NDI) -- 5.3.1 Mutations in the vasopressin V2 receptor -- 5.3.2 Mutations in AQP2 -- 5.4 Acquired NDI -- 5.5 Treatments for DI --; 6. Additional pathophysiological states associated with impaired water balance -- 6.1 Chapter overview -- 6.2 Heart failure -- 6.3 Hypertension -- 6.4 Cirrhosis of the liver -- 6.5 Compulsive water drinking -- 6.6 Burn injuries -- 6.7 Medications that alter fluid dynamics -- 6.7.1 Diuretics -- 6.7.2 Aquaretics -- 6.7.3 Peroxisome proliferator-activated receptor, subtype [gamma] (PPAR [gamma]) agonists --; References -- Author biographies.
• Sommario/riassunto: This book discusses our intimate relationship with and dependence on water, how the body regulates its water levels, and various pathophysiological states associated with impairments in body water homeostasis. The human body consists of 70-80% water. Therefore, concise control of water homeostasis is essential to survival and involves coordination of several systems, but primarily the brain and kidney systems. Water requirements of the average healthy human range between 2-4 L/d, and a major portion of this can come from food sources. The major hormonal regulator of water balance is the anti-diuretic hormone, vasopressin. Vasopressin, a 9-amino acid peptide, is produced in the hypothalamus, stored in the posterior pituitary, and secreted when plasma osmolality rises. Vasopressin acts on the kidney to conserve water. The kidneys filter 180 L of blood per day, consisting of about 50-65% water, and reabsorb around 99% of this in the proximal tubule, distal tubule, and collecting duct, producing only 1-2 L of urine. The vasopressin-sensitive distal tubule and collecting duct are responsible for fine-tuning water reabsorption. Conditions exist, however, where urine cannot be concentrated effectively. This is known as diabetes insipidus and can lead to dehydration and failure to thrive. At the other extreme, hyponatremia (low serum sodium) is the inability to adequately dilute urine or get rid of free body water in excess of body needs, a serious and sometimes fatal condition.

Topics in quaternion linear algebra / / Leiba Rodman

• Record Nr.: UNINA9910786530203321
• Autore: Rodman L.
• Pubbl/distr/stampa: Princeton, New Jersey ; ; Oxfordshire, England : , : Princeton University Press, , 2014; ©2014
• ISBN: 1-4008-5274-9
• Edizione: [Course Book]
• Descrizione fisica: 1 online resource (379 p.)
• Collana: Princeton Series in Applied Mathematics
• Classificazione: SK 230
• Disciplina: 512/.5
• Soggetti: Algebras, Linear; Quaternions
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Front matter -- Contents -- Preface -- Chapter One. Introduction -- Chapter Two. The algebra of quaternions -- Chapter Three. Vector spaces and matrices: Basic theory -- Chapter Four. Symmetric matrices and congruence -- Chapter Five. Invariant subspaces and Jordan form -- Chapter Six. Invariant neutral and semidefinite subspaces -- Chapter Seven. Smith form and Kronecker canonical form -- Chapter Eight. Pencils of hermitian matrices -- Chapter Nine. Skewhermitian and mixed pencils -- Chapter Ten. Indefinite inner products: Conjugation -- Chapter Eleven. Matrix pencils with symmetries: Nonstandard involution -- Chapter Twelve. Mixed matrix pencils: Nonstandard involutions -- Chapter Thirteen. Indefinite inner products: Nonstandard involution -- Chapter Fourteen. Matrix equations -- Chapter Fifteen. Appendix: Real and complex canonical forms -- Bibliography -- Index
• Sommario/riassunto: Quaternions are a number system that has become increasingly useful for representing the rotations of objects in three-dimensional space and has important applications in theoretical and applied mathematics, physics, computer science, and engineering. This is the first book to provide a systematic, accessible, and self-contained exposition of quaternion linear algebra. It features previously unpublished research results with complete proofs and many open problems at various levels, ; as well as more than 200 exercises to facilitate use by students and instructors. Applications presented in the book include numerical ranges, invariant semidefinite subspaces, differential equations with symmetries, and matrix equations. Designed for researchers and students across a variety of disciplines, the book can be read by anyone with a background in linear algebra, rudimentary complex analysis, and some multivariable calculus. Instructors will find it useful as a complementary text for undergraduate linear algebra courses or as a basis for a graduate course in linear algebra. The open problems can serve as research projects for undergraduates, topics for graduate students, or problems to be tackled by professional research mathematicians. The book is also an invaluable reference tool for researchers in fields where techniques based on quaternion analysis are used.