Aging physiology

Host and parasite have coevolved over millions of years and exist in mutual tolerance, disease only being apparent when the balance is upset by the host being exposed to unusually high parasite burdens at times when immunocompetence is diminished by age, physiological state, disease or nutritional status. The host immune response is multifaceted and it is... 

Gerking, S.D. (1952).The protein metabolism of sunfishes of different ages. Physiological Zoology 25,358-372. 

Nikitin, V.N. (1966). On some basic factors of ontogenesis (In Russian). In Major Problems of Age, Physiology and Biochemistry (V.N. Nikitin, ed.), pp. 3-31. Meditsina, Moscow. 

ISBN 978-1-4200-6137-6 (hardcover alk. paper) 1. Phytochemicals—Physiological effect—Congresses. 2. Aging--Physiological aspects—Congresses. 3. Materia medica, Vegetable—Congresses. I. Meskin, Mark S. II. Bidlack, Wayne R. III. Randolph, R. Keith. IV. Title. 

DNLM 1. Aging--physiology—Congresses. 2. Phytotherapy—methods—Congresses. 

Risk assessment. The model accounts for most of the major features of chromium(VI) and chromium(III) absorption and kinetics in the rat, and reduction from the chromium(VI) to the chromium(III) valence state, but the bioavailability/absorbability of chromium from environmental sources is mostly unknown, except for bioavailability/absorbability of a few chemically defined salts. Furthermore, the mechanisms by which chromium reserves from bone tissue are released into plasma as well as age, physiological conditions and species variations are important considerations in the refinement of any PBPK model for risk assessment purposes. 

Nutritional values of fats and oils differ with fatty acid composition, with the species, age, physiological stage, environment of the animal, and adequacy of the overall diet. Care should be exercised in regard to the following ... 

Douglas RM, Haddad GG. Can 02 dysregulation induce premature aging Physiology (Bethesda). 2008 23 333-349. 

There is no information on the efficacy of LAB in relation to host age, physiological status, and dietary intake. All these factors may have an important bearing on the ability of LAB to influence host responses. 

I. E. Morley Anorexia of aging Physiologic and pathologic. American Journal of Clinical Nutrition 66,760 (1997). 

As the majority of patients are still not suitable for radical treatments due to age, physiologic status, or advanced disease, good palliation with minimal morbidity and mortality is important. Patients suffering dysphagia may benefit from intubation of strictures with insertion of rigid plastic tubes or self-expanding stents. Simple dilation offers short-term relief but does have significant risk of perforation. Some patients may benefit from chemotherapy or radiation therapy. 

Humans require certain minimal quantities of essential amino acids from a biologically available source as part of a larger protein/nitrogen intake. The required amounts of these amino acids vary with age, physiological condition, and state of health. It is therefore important to be able to discriminate with both accuracy and precision the relative efficiency with which individual protein sources can meet human biological needs. This efficiency also has direct implications for the commercial value of the protein product [101,107]. 

Budding patterns vary depending on culture age, physiological status, and the physical/chemical conditions of culture. For example, Dekkera/ Brettanomyces are described as reproducing asexually through multilateral budding. However, older cells may exhibit a cell shape suggestive of... 

Amino acid levels in body fluids are influenced by a number of factors, such as age, physiological changes, nutritional status, illness and disease, medications and toxins. It is notable that medications can cause artifacts that interfere with the analysis or can disrupt the body s metabolism of amino acids, leading to an abnormal amino acid pattern which, although suggestive of an inborn error, is actually an acquired condition. These factors are discussed below. 

Table B.8. Effects of age/physiological changes/toxins on amino acid values...

Stringent standardization of test conditions will reduce inherent variability (see Cherry 1993). Factors such as the strain of the animal, age, physiological condition, and social and sexual experiences of the subject, should be held constant. Social status of donor and test subjects affects responses. Assays should be conducted at consistent times across days. Reversed light/dark cycles are conve-... 

Category Age Physiological Stage Weight Height (kg) (cm) Basal Factor Per Kg Caloric Intake, Kcal Per Day... 

The absorption of lead from environmental sources depends on the amount of lead present, the physical state (usually characterized by particle size), and the chemical speciation. A host of factors influence the lead absorption in any individual, these include age, physiological status, quantity of food eaten or air breathed, the proportionate ingestion or inhalation of lead, body weight, and the quantity of energy expended in day-to-day acitivity. 

---