Estimation of total body volume from arm measurements in Punjabi girls aged 10-19 years

1979 ◽  
Vol 50 (3) ◽  
pp. 387-391 ◽  
Author(s):  
Raghbir Singh ◽  
Chand Raja
2011 ◽  
Vol 14 (2) ◽  
pp. 168
Author(s):  
Joseph Wilson ◽  
Jennifer Sherman ◽  
John Shepherd

1969 ◽  
Vol 26 (8) ◽  
pp. 2077-2091 ◽  
Author(s):  
Vivien M. Brawn

Pacific and Atlantic herring after adjustment to water 36 cm deep had sinking-factors between 1000 and 1008 and showed an inverse relationship between oil content and swimbladder volume up to 12% oil. At higher oil contents a swimbladder volume between 2.6 and 3.0% of total body volume was maintained. The mean volumes and densities of various components of the Pacific herring held in captivity were: swimbladder gas 4.1% of total volume,.0013 g/ml; oil 3.5%,.926 g/ml; scales 0.5%, 1.966 g/ml; skeleton 1.2%, 1.993 g/ml; rest of fish 90.6%, 1.057 g/ml. These components on the average exerted upward forces of 41.4 and 3.3 dynes/ml of fish due to gas and oil, and downward forces of 4.6, 11.2, and 32.1 dynes/ml due to scales, skeleton, and the rest of the fish respectively. Under natural conditions herring usually have high oil contents so the relationship observed here suggests they have low swimbladder volumes. This combined with a duct direct from the swimbladder to the exterior and the lack of gas secretion would give the herring freedom of vertical movement and a low change of sinking factor with depth.


2006 ◽  
Vol 20 (4) ◽  
Author(s):  
Jack Wang ◽  
Dympna Gallagher ◽  
John Thornton ◽  
Wen YU ◽  
Rich Weil ◽  
...  

1999 ◽  
Vol 31 (Supplement) ◽  
pp. S390
Author(s):  
R. P. Mikat ◽  
P. A. Eisenman ◽  
G. D. Ellis ◽  
S. C. Johnson ◽  
W. A. Sands ◽  
...  

2004 ◽  
Vol 52 (2) ◽  
pp. 235-243 ◽  
Author(s):  
T. Müller ◽  
T. Molnár ◽  
Éva Szabó ◽  
R. Romvári ◽  
Cs. Hancz ◽  
...  

Female European eels were kept in artificial seawater for a trial period of 14 weeks. Three fish were injected intra-abdominally with carp pituitary suspension (twice a week) and human chorionic gonadotropin (every 2nd week), with the aim to induce artificial maturation. Three further fish were not treated (control). Fish were not fed during the trial. The treated fish were scanned by computed tomography (CT) every second week (the controls only at the start and at the end of the trial) to follow changes in body composition. Notable decreases were shown in total body pixel number (body volume), total body fat content, total fillet volume and fillet fat content during the experiment. Changes were more pronounced in the treated group than in the control. The abdominal volume strongly increased in the responding fish throughout the trial. The ovary volume increased measurably, while its fat content increased only until the 8th week, after which a decrease was measured. Tissue volumetric estimations of the ovary were also supported by histological results. A so-called volumetric gonadosomatic index (gonad volume/total body volume × 100) was developed for the quantitative characterisation of eel maturation.


2016 ◽  
Vol 78 (5) ◽  
pp. 429-432
Author(s):  
Darrell Lynn Ray

Students are almost universally interested in animals, and especially endotherms, including mammals and birds. According to Bergmann's rule, endotherms that live in colder climates at higher latitudes are larger than those living in warmer climates. As with most biological principles, hands-on investigation will provide a better understanding of why size is important in endotherm thermal regulation. One easily observable aspect of this principle is that larger organisms have a lower ratio of body surface area to total body volume. This affects how efficiently they can retain or radiate heat, which can be easily tested in the laboratory using commonly available materials. In this activity, simple models of endotherms of different sizes are used to assess the effects of body size on heat loss.


2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Vito M. Campese ◽  
Elaine Ku ◽  
Jeanie Park

Hypertension in chronic renal disease and renovascular disease is often resistant to therapy. Understanding the pathogenic mechanisms responsible for hypertension in these conditions may lead to improved and more targeted therapeutic interventions. Several factors have been implicated in the pathogenesis of hypertension associated with renal disease and/or renal failure. Although the role of sodium retention, total body volume expansion, and hyperactivity of the renin-angiotensin-aldosterone system (RAAS) are well recognized, increasing evidence suggests that afferent impulses from the injured kidney may increase sympathetic nervous system activity in areas of the brain involved in noradrenergic regulation of blood pressure and contribute to the development and maintenance of hypertension associated with kidney disease. Recognition of this important pathogenic factor suggests that antiadrenergic drugs should be an essential component to the management of hypertension in patients with kidney disease, particularly those who are resistant to other modalities of therapy.


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