Energy Metabolism and Nutrition

Swift, R. W.; French, C. E.

doi:10.1097/00007611-195408000-00033

Cited by 19 publications

(8 citation statements)

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“…The respiratory quotient increased from about 0.80 to 0.85 ( Fig. 4), indicating that carbohydrate oxidation had increased by about 50% during the study (Swift & French, 1954). Neither EE nor RQ were significantly influenced by the infusions of heparin or LMWH.…”

Section: Resultsmentioning

confidence: 92%

Plasma lipolytic activity and substrate oxidation after intravenous administration of heparin and a low molecular weight heparin fragment

Persson

Nordenström²,

Nilsson‐Ehle

et al. 1990

Clinical Physiology

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This study examines the effects of heparin and a low molecular weight heparin (LMWH) fragment on plasma lipolytic activity and substrate oxidation. Indirect calorimetry was performed continuously in healthy male subjects receiving a constant infusion of fat emulsion (0.2 g min-1) and glucose (0.8 g min-1) during a period of 4 h. After 2 h an infusion of heparin (n = 6) or LMWH (n = 6) (100 antifactor Xa units kg-1) or saline (n = 6) was given over 1 h. Plasma concentration of the fat emulsion decreased by 76 +/- 5% with heparin and by 12 +/- 7% with LMWH (P less than 0.01). In the case of LMWH the initial fall was followed by a consistent rise in fat emulsion concentration for the entire remaining study period. Compared to the control experiments, plasma FFA increased five times with heparin and three times with LMWH (P less than 0.05). The average respiratory quotient (RQ) and energy expenditure (EE) increased constantly during the study period and did not differ significantly between the groups. In all groups the average increase in glucose oxidation was 40-50%, while fat oxidation decreased to a comparable extent. Infusions of heparin and LMWH had no effect on RQ or EE. A microcalorimetric study on isolated rat adipocytes in buffer solutions containing glucose, fat emulsion, heparin or LMWH was also made. The heat output from the adipocytes was not influenced by the presence of heparin or LMWH. In conclusion, infusion of heparin resulted in a pronounced increase in FFA availability, whereas LMWH exerted a less marked lipolytic effect. However, the heparin-induced elevations in plasma FFA were not accompanied by measurable rises in lipid oxidation rate.

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Section: Resultsmentioning

confidence: 92%

Plasma lipolytic activity and substrate oxidation after intravenous administration of heparin and a low molecular weight heparin fragment

Persson

Nordenström²,

Nilsson‐Ehle

et al. 1990

Clinical Physiology

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“…The line of best fit was detennined by least squares. energy source is protein, carbohydrate, or fat (Swift and French 1954). For each individual in each collection, the calories lost in respiration per day were calculated by multiplying the weight specific oxygen consumption per hour by 24 X 5.0.…”

Section: Respirationmentioning

confidence: 99%

Natural History, Limiting Factors and Energetics of the Opisthobranch Navanax Inermis

Paine¹

1965

Ecology

117

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“…Direct methods such as the D 2 Oi 8 technique (L i f s o n et al ., 1955), the use of radioactive isotopes (Odum & Golley, 1963), and telemetry have already shown their usefulness. The indirect methods used by Brody (1945) and Swift & French (1954) are now well known and particularly useful in long term studies. The metabolism of small mammals is often determined by measuring the oxygen consumption (Morri-son, 1947), carbon dioxide production (Brody, 1945) and urinary--nitrogen excretion (Hawk et al, 1949).…”

Section: Introductionmentioning

confidence: 99%

The metabolic energy requirements of the redback vole

Buckner¹,

Bergeron²

1973

Acta Theriol.

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Continuing studies on energy cycling through the bog ecosystems of southern Manitoba necessitate information on the energy budget of the redback vole, Clethrionomys gapperi loringi (Bailey, 1897). Oxygen consumption, carbon dioxide production and urinary nitrogen excretion were measured for this species in a closed system respirometer over a narrow range of temperatures. At temperatures in the mid 50 o, s F oxygen consumption was 6.33 cc/g-hr, in the low 60°'s it was 5.92 cc/g-hr and in the high 60 o, s 4.59 cc/g-hr. Over these temperature ranges carbon dioxide production averaged 4.20, 3.60 and 2.90 cc/g-hr respectively and urinary nitrogen 2.475, 1.838 and 1.821 mg per hour respectively. Basal metabolism was approximately 3.97 Kcal/day and active daily metabolism about 6.45 Kcal/day based upon an average 19.1 g vole. The metabolic rates of males were slightly but significantly higher than females.

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Energy Metabolism and Nutrition

Cited by 19 publications

References 0 publications

Plasma lipolytic activity and substrate oxidation after intravenous administration of heparin and a low molecular weight heparin fragment

Plasma lipolytic activity and substrate oxidation after intravenous administration of heparin and a low molecular weight heparin fragment

Natural History, Limiting Factors and Energetics of the Opisthobranch Navanax Inermis

The metabolic energy requirements of the redback vole

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