Physiologically limitation

These parameters are used to evaluate how stressful a given hot working environment is. Depending on the physiological limitations for factors such as sweat rate, total sweat loss, heat storage, and skin wettedness, which are listed in Table 6.8, it is possible to evaluate whether a given environment is acceptable for continuous work. The method also allows calculation of an acceptable working time. Detailed equations for the calculations can be found in the standard (ISO 7933). The relation between the operative temperature and for different... 

Trace amines, most notably PEA, have been implicated in the etiology of depression. It has been suggested that trace amines stabilize mental functions within physiological limits, a hypothesis which might be in line with the assumed role of trace amines as... 

Falkowski, P. G., Greene, R. and Geider, R. (1992). Physiological limitations on phytoplankton productivity in the ocean. Oceanography 5, 84-91. 

Physiology is the study of the functions of the human body. In other words, the mechanisms by which the various organs and tissues carry out their specific activities are considered. Emphasis is often placed on the processes that control and regulate these functions. In order for the body to function optimally, conditions within the body, referred to as the internal environment, must be very carefully regulated. Therefore, many important variables, such as body temperature, blood pressure, blood glucose, oxygen and carbon dioxide content of the blood, as well as electrolyte balance, are actively maintained within narrow physiological limits. 

The PHSS method of real-time H2S measurement allows for investigating the potentially complex H2S kinetic responses of organs, tissues, cells, and mitochondria as levels of 02 and NO as well as metabolic state are adjusted within physiological limits. Kinetic changes in H2S concentration continuously reported by the PHSS, which are not seen with other H2S measurement techniques, suggest potentially complex interactions of H2S production and consumption mechanisms. H2S may likely exist as a cellular pool of free and labile persulfides able to rapidly respond to redox challenges with production and consumption pathways that operate to maintain the pool. This possible scenario reinforces the need for the PHSS as a valuable tool to provide a continual report of H2S throughout the course of an experimental treatment or to accurately determine H2S levels in situ. 

Calculations performed by Winter [35] showed that the increase in hydrostatic pressure (3-6 Torr) is within the physiological limits and should be well tolerated by the eye (normal intra-ocular pressure 20 Torr). 

Within man s living environment on this planet the pressure ranges from a low vacuum -around 0,25 bar on top of the highest mountain - up to a high pressure of around 1000 bar -on the deepest ocean floor - both exceeding the physiological limits of human beings more or less drastically. 

The amount of antibody initially bound to antigen will be determined by the association rate and incubation time, and of course by the level of antigen expression. The association rate is influenced by the association rate constant, antibody concentration, and temperature. Other factors, such as salt concentration and pH, are also important, but these are usually controlled within physiological limits. Further processes before analysis (washing, fixation, storage) may result in loss of some of the antibody initially bound the amount lost will depend on the dissociation rate and valency, and will also be influenced by temperature. 

The claimed body-building effect of the so-called anabolic compounds reflects their ability to promote muscular development, even beyond physiological limits, and this can bring with it cardiovascular complications. Surreptitious misuse by athletes remains a recurrent problem in professional sport (73) apart from the cardiovascular risks, one observes numerous physiological changes, including effects on plasma levels of enzymes, minerals and vitamins and reduced concentrations of HDL cholesterol (74). 

Another design one could take for retention in the upper GI tract has been bioadhesive microparticles that stick to the mucus or the mucosa in the upper GI tract, particularly in the duodenum and jejunum.19-21 Charged polymers and even antibodies have demonstrated adhesion to the mucosa quite successfully in vitro,22,23 but these bioadhesives have been less successful in vivo owing to two physiological limitations. The turnover of mucus is rapid and limits the duration of adhesion.24 Moreover, approximately 2 percent of even the most bioadhesive microparticles with either specific antibody interactions or nonspecific interactions are retained along the stomach or intestinal wall (unpublished data by the authors). 

Green, R. M., Z. S. Kolber, D. G. Swift, N. W. Tindale, and P. G. Falkowski. 1994. Physiological limitation of phytoplankton photosynthesis in the eastern equatorial Pacific determined from variability in the quantum yield of fluorescence. Limnology and Oceanography 39 1061-1074. 

Gimeno, A. et al., Retinol, at concentrations greater than the physiological limit, induces oxidative stress and apoptosis in human dermal fibroblasts, Exp. Dermatol., 13, 45, 2004. 

The psychological and physiological limitations and capabilities constitute the ergonomics or human factors. It is the most important part of the occupational safety and health program. This is to evaluate personnel capabilities and improve human safety, comfort, and productivity in the workplace. Work-related musculoskeletal disorders (WMSD) are the results of ergonomics and limitations of the human body to a sudden change or continuous working on a physical job, especially where most of the jobs are carried out manually. 

King G. M. (1996b) Physiological limitations of methano-trophic activity in situ. In Microbiology of Atmospheric Trace Gases (eds. J. C. Murrell and D. P. Kelly). Springer, Berlin, pp. 17-32. 

Bouwmeester, H.J., Davies, J.A.R., Smid, H.G. and Weltren, R.S.A. (1995b). Physiological limitations to carvone yield in caraway (Carum carvi L.). Industrial Crops and Products, 4(1) 39-51. 

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