Seasonal variation in muscle glycogen in beef steers

2004 ◽  
Vol 44 (8) ◽  
pp. 729 ◽  
Author(s):  
B. W. Knee ◽  
L. J. Cummins ◽  
P. Walker ◽  
R. Warner
Keyword(s):  
Muscle Glycogen ◽  
Economic Problem ◽  
Seasonal Effects ◽  
Beef Steers ◽  
Stocking Rate ◽  
Beef Industry ◽  
Glycogen Level ◽  
Beef Carcasses ◽  
The Relationship ◽  
Muscle Glycogen Level

Dark-cutting in beef carcasses is a quality and economic problem for the grass-fed beef industry in Australia, with ~10% of carcasses graded as dark-cutting. Dark-cutting results from low muscle glycogen levels at the time of slaughter. An experiment was designed to examine the relationship between season and muscle glycogen levels for cattle at pasture. Sixty steers were allocated to 2 stocking rate treatments, low and high (1.5 and 2.5 steers/ha, respectively) with 3 replicates for each treatment and grazed in 6 separate paddocks. Monthly samples of the M. semimembranosus (SM) and M. semitendinosus (ST) were taken by biopsy from all cattle and analysed for glycogen and lactate content. Significant differences in muscle glycogen were found between seasons. Average muscle glycogen levels for autumn, winter, spring and summer were 1.24, 1.00, 1.15 and 0.82 mg/g SM and 0.85, 0.91, 1.05 and 0.76 mg/g ST, respectively. The seasonal effects on muscle glycogen were not influenced by stocking rate, but it is postulated that they were influenced by nutrition, with the peak in muscle glycogen level generally coinciding with the peak in pasture quantity and quality in spring.

More tetanic contractions are required for activating glucose transport maximally in trained muscle

1997 ◽  
Vol 83 (2) ◽  
pp. 429-433 ◽  
Author(s):  
Kentaro Kawanaka ◽  
Izumi Tabata ◽  
Mitsuru Higuchi
Keyword(s):  
Skeletal Muscle ◽  
Exercise Training ◽  
Protein Content ◽  
Glucose Transport ◽  
Muscle Glycogen ◽  
Male Rats ◽  
Training Effect ◽  
Glycogen Level ◽  
The Relationship ◽  
Muscle Glycogen Level

Kawanaka, Kentaro, Izumi Tabata, and Mitsuru Higuchi. More tetanic contractions are required for activating glucose transport maximally in trained muscle. J. Appl. Physiol. 83(2): 429–433, 1997.—Exercise training increases contraction-stimulated maximal glucose transport and muscle glycogen level in skeletal muscle. However, there is a possibility that more muscle contractions are required to maximally activate glucose transport in trained than in untrained muscle, because increased glycogen level after training may inhibit glucose transport. Therefore, the purpose of this study was to investigate the relationship between the increase in glucose transport and the number of tetanic contractions in trained and untrained muscle. Male rats swam 2 h/day for 15 days. In untrained epitrochlearis muscle, resting glycogen was 26.6 μmol glucose/g muscle. Ten, 10-s-long tetani at a rate of 1 contraction/min decreased glycogen level to 15.4 μmol glucose/g muscle and maximally increased 2-deoxy-d-glucose (2-DG) transport. Training increased contraction-stimulated maximal 2-DG transport (+71%; P < 0.01), GLUT-4 protein content (+78%; P < 0.01), and resting glycogen level (to 39.3 μmol glucose/g muscle; P < 0.01) on the next day after the training ended, although this training effect might be due, at least in part, to last bout of exercise. In trained muscle, 20 tetani were necessary to maximally activate glucose transport. Twenty tetani decreased muscle glycogen to a lower level than 10 tetani (18.9 vs. 24.0 μmol glucose/g muscle; P < 0.01). Contraction-stimulated 2-DG transport was negatively correlated with postcontraction muscle glycogen level in trained ( r = −0.60; P < 0.01) and untrained muscle ( r = −0.57; P < 0.01).

Muscle glycogen level and meat quality in pigs of different halothane genotypes

Meat Science ◽  
1995 ◽  
Vol 40 (1) ◽  
pp. 121-125 ◽  
Author(s):  
Maria Kocwin-Podsiadla ◽  
W. Przybylski ◽  
Jolanta Kuryl ◽  
A. Talmant ◽  
G. Monin
Keyword(s):  
Meat Quality ◽  
Muscle Glycogen ◽  
Glycogen Level ◽  
Muscle Glycogen Level

Post-exercise carbohydrate plus whey protein hydrolysates supplementation increases skeletal muscle glycogen level in rats

Amino Acids ◽  
2009 ◽  
Vol 38 (4) ◽  
pp. 1109-1115 ◽  
Author(s):  
Masashi Morifuji ◽  
Atsushi Kanda ◽  
Jinichiro Koga ◽  
Kentaro Kawanaka ◽  
Mitsuru Higuchi
Keyword(s):  
Skeletal Muscle ◽  
Whey Protein ◽  
Muscle Glycogen ◽  
Protein Hydrolysates ◽  
Glycogen Level ◽  
Post Exercise ◽  
Whey Protein Hydrolysates ◽  
Skeletal Muscle Glycogen ◽  
Muscle Glycogen Level

Effect of preslaughter handling on muscle glycogen level and selected meat quality traits in beef

Meat Science ◽  
1998 ◽  
Vol 50 (3) ◽  
pp. 389-393 ◽  
Author(s):  
R. Lahucky ◽  
O. Palanska ◽  
J. Mojto ◽  
K. Zaujec ◽  
J. Huba
Keyword(s):  
Meat Quality ◽  
Muscle Glycogen ◽  
Quality Traits ◽  
Glycogen Level ◽  
Meat Quality Traits ◽  
Muscle Glycogen Level

Muscle and Liver Glycogen of Mouse Strains Susceptible or Resistant to Nutritionally Induced Obesity

1956 ◽  
Vol 187 (3) ◽  
pp. 415-416
Author(s):  
John B. Lyon ◽  
Paul F. Fenton
Keyword(s):  
Muscle Glycogen ◽  
Liver Glycogen ◽  
The Other ◽  
Mouse Strains ◽  
Glycogen Level ◽  
Strain Mouse ◽  
Nutritional Obesity ◽  
Muscle Glycogen Level

Muscle and liver glycogen levels of mice differing in their susceptibility to nutritionally induced obesity were studied in relation to inherited differences in metabolic and endocrine patterns. The I/Fn strain, resistant to nutritional obesity, is characterized by a muscle glycogen level four to six times higher than those of strains which can be made obese. The liver glycogen of the I strain mouse is significantly lower than those of the other strains. Muscle glycogen levels were found to reach a maximum at about 6 months of age in all but one of our strains.

The Relationship between Certain Bone Measurements and Cutability of Beef Carcasses

1972 ◽  
Vol 35 (3) ◽  
pp. 518-524 ◽  
Author(s):  
G. C. Skelley ◽  
D. A. Durfos ◽  
T. E. Bonnette
Keyword(s):  
Beef Carcasses ◽  
The Relationship

scholarly journals Time series analysis of the relationship between diarrhea in children and Rota 2 vaccine in the Fanteakwa District of the eastern region of Ghana

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
James Atampiiga Avoka ◽  
Elvis J. Dun-Dery ◽  
Issah Seidu ◽  
Armel N. E. Abou ◽  
Paul Twene ◽  
...  
Keyword(s):  
Pearson Correlation ◽  
Developed Countries ◽  
Seasonal Effects ◽  
Eastern Region ◽  
Least Developed Countries ◽  
R Software ◽  
Significant Difference ◽  
Severe Gastroenteritis ◽  
Access To Medical Care ◽  
The Relationship

Abstract Background Rotavirus is considered the main causal factor of severe gastroenteritis among infants and children globally. The association with severe rotavirus infection is mostly worse among the least developed countries, mainly due to inadequate access to medical care and poverty. This study was conducted to determine the seasonal effects in respect of diarrhea cases in children, the association between diarrhea cases and Rota2 vaccine in the Fanteakwa District of the Eastern Region of Ghana. Methods The study compares monthly diarrhea cases against children vaccinated with Rota2 extracted from DHIMS2 spanning May 2012 to December 2017 in Fanteakwa District. A univariate association between diarrhea cases and children vaccinated with Rota 2 was conducted using the R-software version 3.4.4 with the use of forecast, tseries and TSAPred. Pearson Correlation coefficient was also computed between monthly diarrhea cases and Rota 2 as well as lagged values of Rota 2 and Diarrhea cases. Results The study shows that February recorded the highest average number of diarrhea cases (172) over the period 2012 to 2017 with a standard deviation of 59. However, a one-way analysis of variance shows a significant difference amongst the monthly averages with an F-statistic of 0.042 and P-value of 0.064. It is observed that the correlations between each of the Rota2 doses and the lagged cases are positive, showing higher Rota2 doses a month ago ((Xt − 1),0.346 to0.735), two months ago ((Xt − 2),0.383 to 0.746), three months ago ((Xt − 3), 0.330 to 0.737) and four months ago ((Xt − 4), 0.236 to 0.723) are associated with lower diarrhea cases. The results also show that an increase in the previous two month’s Rota2 figures by 100 is associated with a significant decrease in the currently expected diarrhea cases by approximately 36. Conclusion Seasonal variations exist in the occurrence of diarrhea in children, with January recording the highest number of diarrhea cases (172). There is a relationship between episodes of diarrhea in children and Rota2 (p-value = 0.064); thus, the more children are vaccinated with Rota2, the less diarrhea cases are recorded. Diarrhea cases in Fanteakwa district are generally low, except 2013 and 2016 where the cases are higher than the rest of the other years.

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