scholarly journals EFFECT OF INTRAOSSEOUS INTRODUCTION OF SELENIUM/ARABINOGALACTAN NANOGLYCOCONJUGATE ON THE MAIN INDICATORS OF PRIMARY METABOLISM IN CONSOLIDATION OF BONE FRACTURE

2016 ◽  
Vol 1 (4) ◽  
pp. 104-108 ◽  
Author(s):  
Родионова ◽  
Lyubov Rodionova ◽  
Сухов ◽  
Boris Sukhov ◽  
Самойлова ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Body Temperature ◽  
Carbon Dioxide Production ◽  
Control Group ◽  
Elemental Selenium ◽  
Primary Metabolism ◽  
Femoral Bone ◽  
Surgical Wound ◽  
Experimental Group

The research was carried out on 9rabbits (males) of Chinchilla breed with modeling of standard perforating fracture of femoral bone. We performed intraosseous introduction of nanocomposite elemental selenium and heteropolysaccharide arabinogalactan 50mg Se/kg to individuals of experimental group (n=3) and NaCl 0,9% to individuals of control group (n=6). It was established that local intraosseous introduction of the nanocomposite with perforated fracture model did not affect basal metabolic indicators (body temperature, oxygen consumption, carbon dioxide production), but boosted the metabolic processes in the area of the surgical wound from the 9th to 21st days. It proves the bioavailability of the drug and the possibility of creating a local depot of selenium using a nanocomposite.

Thermoregulatory responses of dystrophic hamsters to changes in ambient temperatures

1985 ◽  
Vol 63 (9) ◽  
pp. 1145-1150 ◽  
Author(s):  
M. Desautels ◽  
R. A. Dulos ◽  
J. A. Thornhill
Keyword(s):  
Carbon Dioxide ◽  
Adipose Tissue ◽  
Oxygen Consumption ◽  
Body Temperature ◽  
Metabolic Activity ◽  
Carbon Dioxide Production ◽  
Ambient Temperatures ◽  
Brown Adipose ◽  
Lower Temperature ◽  
Do So

The ability of dystrophic hamsters to maintain their body temperature despite abnormal muscle and brown adipose tissue, two organs involved in thermoregulation, was evaluated. Dystrophic hamsters (CHF 146) between the ages of 30 and 160 days kept at 21 °C had core (rectal) temperatures (TR) that were 0.5–1.5 °C lower than Golden Syrian controls. The reduced core temperatures of dystrophic hamsters were unlikely the result of an incapacity to generate heat since the dystrophic hamsters were able to maintain their TRs during 3 h of acute cold stress (4 °C) and to adapt to prolonged cold exposure. However, TRs of cold-acclimated dystrophic hamsters were still 1 °C below TRs of cold-acclimated control animals. By contrast, increasing the ambient temperature raised TRs of both normal and dystrophic hamsters. When kept at 32 °C overnight, the TRs of dystrophic hamsters remained significantly below those of control animals. When heat-exposed dystrophic hamsters were returned to 21 °C, their TRs returned to values significantly lower than those of control hamsters. Thus, dystrophic hamsters showed a capacity to thermoregulate, like control hamsters, but appeared to do so at a lower temperature. The reduced core temperatures of dystrophic hamsters kept at 21 °C cannot be explained by a reduction in metabolic activity since newborns and 30- and 140-day-old dystrophic hamsters had rates of oxygen consumption [Formula: see text] and carbon dioxide production [Formula: see text] that were similar to those of controls. These results suggest that the thermoregulatory set point may be altered in dystrophic hamsters.

scholarly journals Loss of prokineticin receptor 2 signaling predisposes mice to torpor

2008 ◽  
Vol 294 (6) ◽  
pp. R1968-R1979 ◽  
Author(s):  
Preeti H. Jethwa ◽  
Helen I'Anson ◽  
Amy Warner ◽  
Hayden M. Prosser ◽  
Michael H. Hastings ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Locomotor Activity ◽  
Energy Balance ◽  
Body Temperature ◽  
Transgenic Mice ◽  
Food Deprivation ◽  
Carbon Dioxide Production ◽  
Dark Phase ◽  
Torpor Bouts

The genes encoding prokineticin 2 polypeptide (Prok2) and its cognate receptor ( Prokr2/ Gpcr73l1) are widely expressed in both the suprachiasmatic nucleus and its hypothalamic targets, and this signaling pathway has been implicated in the circadian regulation of behavior and physiology. We have previously observed that the targeted null mutation of Prokr2 disrupts circadian coordination of cycles of locomotor activity and thermoregulation. We have now observed spontaneous but sporadic bouts of torpor in the majority of these transgenic mice lacking Prokr2 signaling. During these torpor bouts, which lasted for up to 8 h, body temperature and locomotor activity decreased markedly. Oxygen consumption and carbon dioxide production also decreased, and there was a decrease in respiratory quotient. These spontaneous torpor bouts generally began toward the end of the dark phase or in the early light phase when the mice were maintained on a 12:12-h light-dark cycle and persisted when mice were exposed to continuous darkness. Periods of food deprivation (16–24 h) induced a substantial decrease in body temperature in all mice, but the duration and depth of hypothermia was significantly greater in mice lacking Prokr2 signaling compared with heterozygous and wild-type littermates. Likewise, when tested in metabolic cages, food deprivation produced greater decreases in oxygen consumption and carbon dioxide production in the transgenic mice than controls. We conclude that Prokr2 signaling plays a role in hypothalamic regulation of energy balance, and loss of this pathway results in physiological and behavioral responses normally only detected when mice are in negative energy balance.

Endotracheal intubation influences respiratory water loss during heat stress in young lambs

1995 ◽  
Vol 79 (3) ◽  
pp. 801-804 ◽  
Author(s):  
K. Hammarlund ◽  
T. Norsted ◽  
T. Riesenfeld ◽  
G. Sedin
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Heat Stress ◽  
Body Temperature ◽  
Water Loss ◽  
Radiative Heat ◽  
Carbon Dioxide Production ◽  
Gas Analysis ◽  
Warm Environment ◽  
Flow Through

To study the effect of intubation on respiratory water loss (RWL) during heat stress, 10 young nonsedated lambs were exposed to radiative heat stress both when intubated and when not. RWL, oxygen consumption (VO2), and carbon dioxide production were monitored continuously by using a flow-through system with a mass spectrometer for gas analysis. When the lambs were not intubated, heat stress caused RWL to increase by 218%, whereas VO2 and body temperature remained unchanged. When the lambs were intubated, heat stress caused RWL to increase by 131% and VO2 to increase by 36%. On extubation during heat stress, RWL increased by 117 +/- 48% (standard error of the estimate) of the preextubation value and body temperature started to fall. This study shows that intubation reduces the ability of the lamb to increase RWL and heat loss during heat stress in a warm environment, possibly as an effect of exclusion of the nose and a reduction in dead space. After extubation, RWL increases markedly, a finding that might also be valid for intubated infants.

scholarly journals Yeast and Respiration Rates: To what extent does Saccharomyces cerevisiae, baker’s yeast, CO2 production levels (as measured in ppm) vary with the length of different sugars?

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Kiran Ganga
Keyword(s):  
Carbon Dioxide ◽  
Saccharomyces Cerevisiae ◽  
Linear Trend ◽  
Carbon Dioxide Production ◽  
Baker’S Yeast ◽  
Co2 Production ◽  
Control Group ◽  
Baker's Yeast ◽  
Baked Goods ◽  
Experimental Group

Saccharomyces cerevisiae, or baker’s yeast, is commonly used for baking alongside sucrose. It is understood that yeast’s reaction with sugar leads to a high emission of carbon dioxide, ultimately increasing the height of baked goods. However, the carbon dioxide production levels at different chains of sugars, including sucrose, glucose, and starch, or monosaccharides, disaccharides, and polysaccharides, is not well-known. Water was tested as a control group. The paper hypothesizes that as length of the sugar polymer chain increases, the production of carbon dioxide of Saccharomyces cerevisiae, or baker’s yeast, increases. While the results showed a linear trend similar to the hypothesis, the production levels for the starch experimental group were lower than any other experimental group. This paper concludes that there is no statistical difference between the lengths of the sugar chain and the carbon dioxide production rate can be rejected

Metabolism during normoxia, hyperoxia, and recovery in newborn rats

1992 ◽  
Vol 70 (3) ◽  
pp. 408-411 ◽  
Author(s):  
Peter B. Frappell ◽  
Andrea Dotta ◽  
Jacopo P. Mortola
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Metabolic Rate ◽  
Carbon Dioxide Production ◽  
Oxygen Availability ◽  
Aerobic Metabolism ◽  
Newborn Rats ◽  
Ambient Temperatures ◽  
Positive Effects

Aerobic metabolism (oxygen consumption, [Formula: see text], and carbon dioxide production, [Formula: see text]) has been measured in newborn rats at 2 days of age during normoxia, 30 min of hyperoxia (100% O2) and an additional 30 min of recovery in normoxia at ambient temperatures of 35 °C (thermoneutrality) or 30 °C. In normoxia, at 30 °C [Formula: see text] was higher than at 35 °C. With hyperoxia, [Formula: see text] increased in all cases, but more so at 30 °C (+20%) than at 35 °C (+9%). Upon return to normoxia, metabolism readily returned to the prehyperoxic value. The results support the concept that the normoxic metabolic rate of the newborn can be limited by the availability of oxygen. At temperatures below thermoneutrality the higher metabolic needs aggravate the limitation in oxygen availability, and the positive effects of hyperoxia on [Formula: see text] are therefore more apparent.Key words: neonatal respiration, oxygen consumption, thermoregulation.

GASEOUS METABOLISM IN PREMATURE INFANTS AT 32-34°C AMBIENT TEMPERATURE

PEDIATRICS ◽  
1964 ◽  
Vol 33 (1) ◽  
pp. 75-82
Author(s):  
Forrest H. Adams ◽  
Tetsuro Fujiwara ◽  
Robert Spears ◽  
Joan Hodgman
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Premature Infants ◽  
Rectal Temperature ◽  
Respiratory Quotient ◽  
Carbon Dioxide Production ◽  
Open Circuit ◽  
Co2 Production ◽  
O2 Consumption ◽  
Rate Of Increase

Thirty-four measurements of oxygen consumption, carbon dioxide production, respiratory quotient, and rectal temperature were made on 22 premature infants with ages ranging from 2½ hours to 18 days. The studies were conducted at 32-34°C utilizing an open circuit apparatus and a specially designed climatized chamber. Oxygen consumption and carbon dioxide production were lowest in the first 12 hours and increased thereafter. The rate of increase in O2 consumption was greater than that of CO2 production, with a consequent fall in respiratory quotient during the first 76 hours of life. A reverse relation of O2 consumption and CO2 production was found following the 4th day of life with a consequent rise in respiratory quotient. There was a close correlation between O2 consumption and rectal temperature regardless of age. A respiratory quotient below the value of 0.707 for fat metabolism was observed in 7 premature infants with ages ranging from 24 to 76 hours.

Measurement of ‘Basal’ and Total Metabolism in Hereditarily Obese-Hyperglycemic Mice

1958 ◽  
Vol 193 (3) ◽  
pp. 495-498 ◽  
Author(s):  
Ruth McClintock ◽  
Nathan Lifson
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Energy Expenditure ◽  
Voluntary Movement ◽  
Carbon Dioxide Production ◽  
Open Circuit ◽  
Energy Output ◽  
Obese Mice ◽  
Energy Expenditures ◽  
Isotope Method

Measurements of oxygen consumption and carbon dioxide production were made by the Haldane open circuit method on hereditarily obese mice and littermate controls, and the energy expenditures were estimated. Studies were made on mice for short periods under ‘basal’ conditions, and for periods of approximately a day with the mice fasted and confined, fasted and relatively unconfined, and fed and unconfined. The total energy expenditures of fed and unconfined obese mice were found to be higher than those of nonobese littermate controls by virtue of a) increased ‘basal metabolism’, b) greater energy expenditure associated with feeding, and possibly c) larger energy output for activity despite reduced voluntary movement. The values obtained for total metabolism confirm those previously determined by an isotope method for measuring CO2 output.

A Controlled Clinical Trial of Local Anesthesia for Lumbar Punctures in Newborns

PEDIATRICS ◽  
1991 ◽  
Vol 88 (4) ◽  
pp. 663-669 ◽  
Author(s):  
Fran L. Porter ◽  
J. Philip Miller ◽  
F. Sessions Cole ◽  
Richard E. Marshall
Keyword(s):  
Carbon Dioxide ◽  
Clinical Trial ◽  
Heart Rate ◽  
Lumbar Puncture ◽  
Local Anesthesia ◽  
Subcutaneous Administration ◽  
Control Group ◽  
Controlled Clinical Trial ◽  
Transcutaneous Oxygen ◽  
Experimental Group

To evaluate the efficacy of subcutaneous administration of lidocaine for reducing physiologic instability in acutely ill newborns during clinically required procedures, 81 neonates who required lumbar punctures within the first month of life were stratified by birth weight and respiratory support and randomly assigned to an experimental or a control group. The experimental group received an injection of 0.1 mL/kg of 1% lidocaine prior to the lumbar puncture. The control group received a nonanesthetized lumbar puncture without placebo. Changes in heart rate, respiratory rate, transcutaneous oxygen and carbon dioxide tensions, and heart rate variability from baseline, preparatory (positioning/handling), lumbar puncture, and recovery periods were measured. The administration of lidocaine did not minimize physiologic instability in response to the lumbar puncture nor was it associated with any detectable adverse effects other than prolonging the duration of the lumbar puncture. Although significant physiologic changes were observed in response to preparatory procedures, few additional changes beyond those occurred in response to lumbar punctures in either the experimental or control group. It is concluded that local anesthesia failed to influence manifestations of physiologic instability during neonatal lumbar punctures and that preparatory procedures were more destabilizing than either the administration of lidocaine or the lumbar puncture itself. The results suggest that the management of newborns requires emphasis on minimizing the destabilizing effects of required and frequent handling procedures.

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