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K F Riegel

Publications and source records attributed to K F Riegel.

17 recordsLinked to original sources
PubMed1976

A note on the modifiability and reversibility of development and aging.

Two major theories of biological development and aging are discussed: the mutation theory and the waste theory. The first relies on the instability of chromosomes and proposes that the aged organism, during his long life span, is more likely to have experienced damaging effects. Changes in irradiation have been introduced to manipulate longevity in the laboratory. The second theory relies on the accumulation of metabolic waste in cells and proposes, likewise, that the aged organism is more likely than the young to experience damaging effects. Recent developments in chemotherapy enable the removal of cellular waste material and, thus, the reversibility of aging processes. Some implications for the behavioral sciences are discussed.

Aging↗
PubMed1975

The pooling of logitudinal studies of aging.

This report describes the pooling of 5 longitudinal studies conducted during the last 20 years in West Germany. The pooling provides the following improvements: By increasing the number of participants the reliability and precision of the results are improved. The sample becomes representative of the whole area of the FRG. Both cohort and age comparisons are improved by extending their ranges. The time-of-testing range is increased from 5 to 17 years. Since the significance of this factor has been recognized often but since few empirical explorations have been made in the past, the extension of the time-of-testing range represents the most important contribution of the present work. The pooling of different studies is possible only if they share a common set of methods. This requirement is met under the present conditions. Moreover, each study adds unique methods to the pool, thus, supplementing the common explorations in a constructive manner.

Aging↗