Results 211 to 220 of about 800,730 (253)

Stability of Physical Activity across the Lifespan

Journal of Health Psychology, 2008
Physical activity is associated with various health-relevant psychosocial and physiological processes, but activity stability across extended time periods is inadequately understood. This lifespan longitudinal cohort study examined activity levels of 723 males and 554 females.
Howard S, Friedman, Leslie R, Martin, Joan S, Tucker, Michael H, Criqui, Margaret L, Kern, Chandra A, Reynolds   +5 more
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Physical Stability and Relaxation of Amorphous Indomethacin

The Journal of Physical Chemistry B, 2005
The alpha- and beta-relaxation processes in amorphous indomethacin have been studied by using differential scanning calorimetry. The beta-process has been detected as a small endothermic peak that emerges before the glass transition step when reheating samples previously annealed in the temperature region -20 to +5 degrees C.
Sergey, Vyazovkin, Ion, Dranca
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Determinism and Stability in Physics

2018
This chapter examines the role of stability and determinism in physical theories such as statistical mechanics. In the physical sciences, the notions of stability and instability, no longer camouflaged in the language of necessity and contingency, are often used in a variety of contexts, from chaos theory to quantum mechanics.
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Physical stabilization of DNA-based therapeutics

Drug Discovery Today, 2001
The development of non-viral vectors for gene delivery has primarily focused on improving the efficiency of gene transfer in vivo. Although there is clearly a need to improve delivery efficiency, studies also indicate that the physical stability of non-viral vectors is not nearly adequate for a marketable pharmaceutical product.
T J., Anchordoquy, S D., Allison, M d.C., Molina, L G., Girouard, T K., Carson   +4 more
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Stabilizing Integrators for Real-Time Physics

ACM Transactions on Graphics, 2018
We present a new time integration method featuring excellent stability and energy conservation properties, making it particularly suitable for real-time physics. The commonly used backward Euler method is stable but introduces artificial damping. Methods such as implicit midpoint do not suffer from artificial damping but are unstable in many common ...
Dimitar Dinev, Tiantian Liu 0002, Ladislav Kavan   +2 more
openaire   +1 more source

Physical Stability of the Microcirculation

1971
Since 1951, BURTON and his colleagues have discussed physical equilibrium of vascular walls by utilizing the Law of Laplace and proposed the concept of critical closing pressure (1–4). These results have been quoted in several standard textbooks of physiology.
T. Azuma, S. Oka
openaire   +1 more source

Characterisation and physical stability of PEGylated glucagon

International Journal of Pharmaceutics, 2007
Glucagon was mono-PEGylated with PEG 5000 at Lys-12 to examine the effect on conformation and physical stability during purification and freeze-drying. The model peptide glucagon is highly unstable and readily forms fibrils in solution. Secondary structure was determined by FTIR and far-UV CD and physical stability was assessed by the Thioflavin T ...
Stigsnæs, Pernille, Frøkjær, Sven, Bjerregaard, Simon, Van De Weert, Marco, Kingshott, Peter, Møller, Eva Horn   +5 more
openaire   +4 more sources

the Physical Stability of Natrolite.

1956
Experiments have been made to determine the stability field of natrolite under elevated pressures and temperatures. The validity of the experiments as reproductions of nature's processes is examined. The equilibrium curve for the upper limit of the natrolite stability field was determined for certain fixed environmental conditions.
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The Correct Physical Basis of Protobranching Stabilization

The Journal of Physical Chemistry A, 2012
The source of the extra stability of branched hydrocarbons over unbranched (hereafter referred to as protobraching stabilization) has been explained in several different self-consistent ways. Gronert, basing his arguments on well-established properties of organic molecules, namely that geminal atoms strongly repel each other, formulated a model which ...
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Physical-chemical limits for the stability of biomolecules

Advances in Space Research, 1986
Water is an indispensable prerequisite for the existence of life. Only in an aqueous environment can biomolecules take up their native, tertiary structure and organize themselves into higher aggregates like multienzyme complexes or cell-organelles. In most of these processes interactions between biomolecules and water play an important role.
openaire   +2 more sources