scholarly journals Metabolism of [14C]Formaldehyde When Fed to Ruminants as an Aldehyde-Casein-Oil Complex

1972 ◽  
Vol 25 (4) ◽  
pp. 807 ◽  
Author(s):  
SC Mills ◽  
LF Sharry ◽  
LJ Cook ◽  
TW Scott
Keyword(s):  
Carbon Dioxide ◽  
Reaction Time ◽  
Body Tissues ◽  
Expired Air

Formaldehyde has been used to protect proteins and lipids from metabolism in the rumen, and the present studies were designed to investigate the metabolism of [140]formaldehyde when given to ruminants as an aldehyde-casein-oil complex. Approximately 60-80% of the consumed [140]formaldehyde was metabolized to carbon dioxide and methane, a further 11-27% was excreted in the faeces, and 5-6% was accounted for in the urine. The amount of radioactivity excreted either in the expired air or faeces appeared to be dependent on the length of the reaction time between the aldehyde and casein prior to feeding. Small amounts of 140 radio� activity were detected in body tissues and milk, but this was not present as formalde� hyde. It is concluded that ruminants effectively metabolize formaldehyde and there is no accumulation of this compound in the carcass or milk.

A New Oxygen Mask: Comparison with Other Clinical Methods of Giving Oxygen

1974 ◽  
Vol 2 (3) ◽  
pp. 214-219 ◽  
Author(s):  
W A Crosbie ◽  
J P Warren ◽  
L A Smith
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Concentration ◽  
Cor Pulmonale ◽  
Blood Levels ◽  
Supplementary Oxygen ◽  
Arterial Blood ◽  
Oxygen Mask ◽  
Clinical Methods ◽  
Expired Air

The performance of a new mask (Mix-O-Mask) for giving supplementary oxygen in clinical situations was compared with three other methods in a patient with cor pulmonale. Measurements were made of the intra-tracheal gas concentrations and arterial blood levels of oxygen and carbon dioxide. The new mask was as reliable as Ventimasks in delivering a claimed oxygen concentration and did not cause rebreathing of expired air. The mask proved durable when worn for sixteen hours in a day and was preferred for comfort by the patient.

Acid-base equilibrium during acute long-lasting experiments in artificially ventilated cats

1979 ◽  
Vol 236 (1) ◽  
pp. R126-R131
Author(s):  
C. Galletti ◽  
M. G. Maioli ◽  
E. R. Sanseverino
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Artificial Ventilation ◽  
Venous Blood ◽  
Co2 Concentration ◽  
Acid Base ◽  
Base Equilibrium ◽  
Acid Base Equilibrium ◽  
Expired Air

Experiments were carried out to study blood acid-base equilibrium in the cat during experiments with artificial ventilation. Blood acid-base equilibrium was examined in the arterial and venous blood by analyzing pH, carbon dioxide and oxygen partial pressure, and plasma bicarbonates. Artificial ventilation was regulated on the basis of this analysis; CO2 concentration in expired air was monitored throughout the experiment. An attempt was made to verify if artificial ventilation could be regulated indirectly only on the basis of CO2 concentration in expired air. The most appropriate acid-base equilibrium was maintained when CO2 concentration in expired air was kept within the range of 3.9-4.1%.

Alternating Copolymerization of Carbon Dioxide with Cyclohexene Oxide Catalyzed by a Novel Catalyst

2012 ◽  
Vol 549 ◽  
pp. 445-448
Author(s):  
Li Dan Fan ◽  
Gang Qin ◽  
Xin Xin Cao ◽  
Shao Kui Cao
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Zinc Complex ◽  
Cyclohexene Oxide ◽  
Novel Catalyst ◽  
Alternating Copolymerization

A novel catalyst for the copolymerization of CO2 and cyclohexene oxide(CHO) was prepared by using BTE and ZnCl2. The zinc complex showed catalytic activity for the copolymerization. The obtained copolymer was characterized by IR and NMR. Effect of reaction time on copolymerization was investigated.

THE METABOLISM OF C14-UREA IN THE RAT

1953 ◽  
Vol 31 (3) ◽  
pp. 151-161
Author(s):  
S. H. Zbarsky ◽  
W. D. Wright
Keyword(s):  
Carbon Dioxide ◽  
Intraperitoneal Injection ◽  
Kidney Liver ◽  
Expired Air

Urea, labelled with carbon14, was synthesized and administered to rats by intraperitoneal injection. The excretion of the carbon14 was followed by analysis of the urine and expired carbon dioxide for radioactivity at various times after the injection and the distribution of the isotope was determined by analysis of organs, blood, and carcass. A portion of the injected urea was rapidly metabolized, up to 17% of the isotope being excreted in the expired air after three hours and 30% after 48 hr. The highest output of C14O2 occurred during the second hour after injection. Most of the remaining isotope was excreted in the urine as urea. After three hours only a small percentage of the injected carbon14 was present in the kidney, liver, and blood, largely as urea. There appeared to be little incorporation of the isotope into the tissues.

Study on the Graft Copolymerization of AN onto PP by Using Supercritical Carbon Dioxide

2013 ◽  
Vol 815 ◽  
pp. 717-721 ◽  
Author(s):  
Ya Zhen Wang ◽  
Di Ma ◽  
Cheng E Yue ◽  
Wei Nan Jia ◽  
Yong Li
Keyword(s):  
Carbon Dioxide ◽  
Reaction Time ◽  
Solid State ◽  
Supercritical Carbon Dioxide ◽  
Graft Copolymerization ◽  
Environmentally Benign ◽  
Graft Polymer ◽  
Swelling Agent ◽  
Grafting Reaction ◽  
Supercritical Carbon

The research reported in this paper aimed at exploring the advantages of using supercritical carbon dioxide (scCO2) as an environmentally benign solvent and swelling agent for carrying out the grafting process of acrylonitrile (AN) onto polypropylene (PP) in the solid state by using benzoyl peroxide (BPO) as initiator in the reaction. In order to get a well graft ratio, the effects of various factors in this grafting reaction are investigated. Those factors included the reaction time, reaction temperature, monomer and initiator concentrations and the CO2 pressure. IR was used to characterize the constituent of the graft polymer. Then anti-aging of the PP-g-AN was studied by UV-vis. Results showed that the scCO2-assisted solid-state grafting process of AN onto PP did have some scientifically interesting and industrially relevant advantages over the melt process. Compare with virgin PP, the graft polymer have a better performance in anti-aging.

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