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caloric

Obsolete a hypothetical elastic fluid formerly postulated as the embodiment of heat

Caloric

 

a hypothetical substance (weightless fluid) representing heat by whose presence in bodies scientists of the 18th and early 19th centuries attempted to explain observed heat phenomena, such as the heating of bodies, heat exchange, thermal expansion, and thermal equilibrium. The caloric theory required that certain unusual properties be ascribed to this fluid, for example, weightlessness, an elasticity greater than that of all other substances, and an ability to penetrate and expand the tiniest pores of bodies. In the 18th century, scientists hypothesized the existence of weightless fluids besides caloric, among them phlogiston, to explain the physical and chemical properties of substances. Only at the beginning of the 19th century was it conclusively proven that heat phenomena are caused by the chaotic movement of atoms and molecules. An important role in refuting the caloric theory was played by the experiments of B. Rumford (1798) and H. Davy (1799) that proved that the heating of bodies can be brought about by mechanical work.

References in periodicals archive ?
Although caloric intake was below the expected energy requirement for CT, the amount of carbohydrate and protein intake were according to the American College of Sports Medicine recommendations in both season trainings.
Mean caloric intake in children of group 1 (age 1-6 years) on day 1 was 283 k/cals where as in group 2 (age 6-12) was 481 k/cals on day 2 in group 1 mean caloric intake was 356 k/cals and of group 2 was 569 k/cals and the mean caloric intake on day 3 for group 1 was 416 k/cals whereas that of group 2 was 702 k/cals.
Over time both groups had similar caloric intakes, yet the fasting mice showed significantly better insulin sensitivity (a protection against diabetes in humans) and greater resistance to a neurotoxin associated with Alzheimer's disease.
Records for patients selected based on our inclusion and exclusion criteria were examined for the following: age, gender, mechanism of injury, Glasgow Coma Scale (GCS) score (3 to 8) on admission to the hospital and the ICU, initial computed tomography scan (CT) results (based on attending radiologist reading), and exact time of nutritional support initiation and achieving full caloric intake.
The results demonstrated a mean EWL for the study was 33% at six months; calorie intake decreased by 45%, 48% and 37%, at four and 12 weeks and 6 months, respectively, from a baseline of 2,062 cal/day; and VAS recall data, using a repeated measures analysis, documented fullness at the beginning of meals and less food consumption corroborating the reduction in caloric intake.
According to caloric intake, the subjects were categorized into two groups: those whose caloric intake in a whole day was above 1,000 kcal and below 1,000 kcal.
Rather than focusing on differences between one caloric sweetener and another, long-term studies comparing high fructose corn syrup-sweetened beverages with non-caloric beverages are more relevant to the issue of increased caloric intake of sweeteners overall," said Rippe.
Those analyses showed that levels of the brain chemical dopamine, known to be central to activating the reward circuitry, increased with caloric intake.
Takes control of metabolism w/ Personalized Prescriptions based on an individual's scientifically measured metabolic rate; ends yo-yo diet cycle; daily caloric intake precisely prescribed & followed up.
The 1989-2000 economic crisis was a unique opportunity to observe the impact of populationwide weight loss in a country due to sustained reductions in caloric intake and a jump in physical activity, the researchers said.
By incorporating the caloric intake from the comprehensive nutritional database on any food consumed, WalkingSpree.
A thorough nutritional history assessment includes details such as a resident's height, weight, body mass index (BMI), medications, labs, caloric intake, food likes and dislikes, portion sizes, food restrictions, ethnic or religious food specifications, appetite, nourishment needs, swallowing problems, and dental evaluation.