scholarly journals Some quantitative data on the role of the ruminant proventriculi in the digestion and absorption of nitrogen-free organic matter

1955 ◽  
Vol 27 (1) ◽  
pp. 70-76
Author(s):  
L. Paloheimo ◽  
A. Mäkelä ◽  
M.-L. Salo
Keyword(s):  
Organic Matter ◽  
Digestive Tract ◽  
Quantitative Data ◽  
Degradation Products

Fourteen cows and five young bulls were fed with hay uniformly during 10 days. After slaughtering, the ingesta of the abomasum were removed and sampled. From the hay, from the contents of the abomasum, and from the feces lignin, N-free organic matter, and N-free non-lignin organic matter were determined. Using the lignin ratio principle, the digestibility of the two N-free fractions was calculated both for the proventriculi and for the whole digestive tract. It appeared that of the total amount of the N-free non-lignin organic matter digested in the whole digestive tract, 76—99 % was digested in the proventriculi. If the results for two of the cows are discarded, the limits in the cows are 85 and 91 %. On the basis of this investigation it can be concluded that in cattle carbohydrates are digested mainly in the proventriculi and their degradation products are absorbed principally from these stomachs.

scholarly journals Further quantitative data on the role of the ruminant proventriculi in the digestion and absorption of nitrogen-free organic matter

1960 ◽  
Vol 32 (1) ◽  
pp. 219-222
Author(s):  
L. Paloheimo ◽  
A. Mäkelä
Keyword(s):  
Organic Matter ◽  
Quantitative Data ◽  
Dry Matter ◽  
Beet Pulp ◽  
Group 5

Using a method previously described the share of the proventriculi in the digestion of nitrogen-free non-lignin organic matter in cows was determined. The cows used in the experiments can be divided into 5 groups according to their food combination: 1) hay as the only food, 2) hay and concentrates in a ratio of 1:0.5, 3) hay and concentrates in a ratio of 1:1, 4) hay and beet pulp in the dry matter ratio of 1:0.5, and 5) hay and swedes in the dry matter ratio of 1:0.5. Omitting some obviously erroneous results the share of the proventriculi seems to vary between 58 and 96 %. This share is largest in group 5 and smallest in groups where the cows were fed with hay and concentrates. In none of the groups did the amount of dry matter consumed seem to have any influence upon the results.

The Leukocyte Digestion of Fibrinogen Degradation Products (FDP)

1971 ◽  
Vol 26 (03) ◽  
pp. 523-525
Author(s):  
K Gibiński ◽  
B Lipiński ◽  
M Trusz-Gluza
Keyword(s):  
Degradation Products ◽  
Fibrinogen Degradation Products

SummaryWhile the native fibrinogen is not digested by the leucocyte proteases both the early and late FDP are digestible without any denaturating reagent. Thus, this reaction may occur in vivo indicating an unknown role of granulocytes in paracoagulation.

Exercise-Induced Fibrinolysis – Fact or Fiction?

1982 ◽  
Vol 48 (02) ◽  
pp. 201-203 ◽  
Author(s):  
N A Marsh ◽  
P J Gaffney
Keyword(s):  
Plasminogen Activator ◽  
Degradation Products ◽  
Coagulation Factors ◽  
Vascular Wall ◽  
Strenuous Exercise ◽  
Fibrin Degradation Products ◽  
Real Increase ◽  
Exercise Induced ◽  
Male Subjects

SummaryThe effect of strenuous exercise on the fibrinolytic and coagulation mechanisms was examined in six healthy male subjects. Five min bicycle exercise at a work-rate of 800 to 1200 kpm. min−1 produced an abrupt increase in plasma plasminogen activator levels which disappeared after 90 min. However, there was no change in early or late fibrin degradation products nor was there a change in fibrinopeptide A levels or βthromboglobulin levels after exercise although activated partial thromboplastin times were significantly shortened. It is concluded that strenuous exercise does not produce any real increase in fibrinogen-fibrin conversion nor any real increase in the breakdown of these proteins. The role of exercise-induced release of plasminogen activator remains unclear, but probably helps to maintain plasma levels in a discontinuous manner concurrently with the continuous low-level secretion from the vascular wall. The shortening of partial thromboplastin time may be due to the raised levels of plasminogen activator changing the activation state of other coagulation factors.

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