Respiration, studies

Respiration Studies in Isolated Mitochondria Cellular respiration can be studied in isolated mitochondria by measuring oxygen consumption under different conditions. If 0.01 m sodium malonate is added to actively respiring mitochondria that are using pyruvate as fuel source, respiration soon stops and a metabolic intermediate accumulates. 

Moore, 1986) and field-based soil respiration studies (Xu and Qi, 2001). 

FIGURE 214. Another drawing of Lavoisier s respiration studies on his assistant Seguin-the man in the rubber suit. Madame Lavoisier depicts herself drawing this scene. (Courtesy Professor Marco Beretta.)... 

A respirator study, conducted in a controlled laboratory setting and in which Co and Ci sampling is performed while the respirator user performs a series of set exercises. The laboratory setting is used to control many of the variables found in workplace studies, while the exercises simulate the work activities of respirator users. This type of study is designed to determine the optimum performance of respirators by reducing the impact of sources of variability through maintenance of tightly controlled study conditions. 

Respiration of the developing peanut is very rapid during fat synthesis but declines before maturity (72) studies of respiration indicate another decline about 8—10 hours after the harvest of peanuts (73). 

Potassium is required for enzyme activity in a few special cases, the most widely studied example of which is the enzyme pymvate kinase. In plants it is required for protein and starch synthesis. Potassium is also involved in water and nutrient transport within and into the plant, and has a role in photosynthesis. Although sodium and potassium are similar in their inorganic chemical behavior, these ions are different in their physiological activities. In fact, their functions are often mutually antagonistic. For example, increases both the respiration rate in muscle tissue and the rate of protein synthesis, whereas inhibits both processes (42). 

Cytisine. This base belongs to the same pharmacological group as nicotine.It is a powerful poison causing nausea, convulsions and death by failure of respiration. The nicotine-like action is shared by A -methyl-cytisine but the latter, according to Scott and Chen, who have made a detailed study of its action, is weaker and has about one-fortieth the toxicity of nicotine. 

ANALEPTICS. When a CNS stimulant is prescribed for respiratory depression, initial patient assessments will include the blood pressure, pulse, and respiratory rate. It is important to note the depth of the respirations and any pattern to the respiratory rate, such as shallow respirations or alternating deep and shallow respirations. The nurse reviews recent laboratory tests (if any), such as arterial blood gas studies. Before administering the drug, the nurse ensures that the patient has a patent airway. Oxygen is usually administered before, during, and after drug administration. 

Scrima L, Hartman PG, Johnson EH, et al The effects of gamma-hydroxybutyrate on the sleep of narcolepsy patients a double blind study. Sleep 13 479 90, 1990 Series F, Series 1, Cormier Y Effects of enhancing slow-wave sleep by gamma-hydroxybutyrate on obstructive sleep apnea. Am Rev Respir Dis 143 1378-1383, 1992 Shannon M Methylenedioxymethamphetamine (MDMA, ecstasy ). Pediatr Emerg Care 16 377-380, 2000... 

Experimental exposure studies have attempted to associate various neurological effects in humans with specific trichloroethylene exposure levels. Voluntary exposures of 1 hours resulted in complaints of drowsiness at 27 ppm and headache at 81 ppm (Nomiyama and Nomiyama 1977). These are very low exposure levels, but the results are questionable because of the use of only three test subjects per dose, lack of statistical analysis, sporadic occurrence of the effects, lack of clear dose-response relationships, and discrepancies between the text and summary table in the report. Therefore, this study is not presented in Table 2-1. No effects on visual perception, two-point discrimination, blood pressure, pulse rate, or respiration rate were observed at any vapor concentration in this study. Other neurobehavioral tests were not performed, and the subjects were not evaluated following exposure. 

Tabak, C. et al.. Chronic obstructive pulmonary disease and intake of catechins, flavonols, and flavones the MORGEN Study, Am. J. Respir. Crit. Care Med., 164, 61, 2001. 

Jayachandran G, H Gorisch, L Adrian (2004) Studies on hydrogenase activity and chlorobenzene respiration in Dahalococcoides sp. strain CBDBl. Arch Microbiol 182 498-504. 

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