Urinary purine derivatives excretion in Bos taurus and Bos indicus cattle

1998 ◽  
Vol 1998 ◽  
pp. 23-23
Author(s):  
F. Herrera Gomez ◽  
F.D.DeB Hovell ◽  
C.A. Sandoval Castro
Keyword(s):  
Small Intestine ◽  
Urinary Excretion ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Purine Derivatives ◽  
Non Invasive ◽  
N Supply ◽  
Tropical Conditions ◽  
Invasive Method ◽  
Microbial N

The purine derivatives (PD) have been proposed as a non-invasive method to estimate microbial-N supply to the small intestine (Chen et al., 1990a; Verbic et al., 1990). The use of PD urinary excretion has the advantage that it can be used with intact animals thus reducing the concern of animal welfare issues. Although, there are known differences in purine metabolism between cattle (B. taurus), sheep and buffaloes (Bubalis bubalis) (Chen et al., 1990b; Chen et al., 1996), no direct comparison of PD urinary excretion has been made so far between cattle especies, therefore, the objective of the present experiment was to compare PD urinary excretion of B. taurus and B. indicus cattle fed similar diets under tropical conditions.

Urinary purine derivatives excretion in Bos taurus and Bos indicus cattle

1998 ◽  
Vol 1998 ◽  
pp. 23-23
Author(s):  
F. Herrera Gomez ◽  
F.D.DeB Hovell ◽  
C.A. Sandoval Castro
Keyword(s):  
Small Intestine ◽  
Urinary Excretion ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Purine Derivatives ◽  
Non Invasive ◽  
N Supply ◽  
Tropical Conditions ◽  
Invasive Method ◽  
Microbial N

The purine derivatives (PD) have been proposed as a non-invasive method to estimate microbial-N supply to the small intestine (Chen et al., 1990a; Verbic et al., 1990). The use of PD urinary excretion has the advantage that it can be used with intact animals thus reducing the concern of animal welfare issues. Although, there are known differences in purine metabolism between cattle (B. taurus), sheep and buffaloes (Bubalis bubalis) (Chen et al., 1990b; Chen et al., 1996), no direct comparison of PD urinary excretion has been made so far between cattle especies, therefore, the objective of the present experiment was to compare PD urinary excretion of B. taurus and B. indicus cattle fed similar diets under tropical conditions.

Urinary recovery of allantoin in normally fed steers

1998 ◽  
Vol 1998 ◽  
pp. 80-80
Author(s):  
F. Herrera Gomez ◽  
F. D. Deb Hovell ◽  
C. A. Sandoval Castro
Keyword(s):  
Urinary Excretion ◽  
Recovery Factor ◽  
Purine Derivatives ◽  
Urinary Recovery ◽  
Host Animal ◽  
N Supply ◽  
Normal Feeding ◽  
The Relationship ◽  
Infusion Technique ◽  
Microbial N

Studies in the use of the purine derivatives technique in ruminants have been stimulated by the possible use of this technique as an estimator of the rumen microbial-N supplied to the host animal. The recovery factor influences the estimation of the total purines absorbed and therefore the microbial-N supply. The relationship between exogenous purine input and urinary excretion and recovery has been studied using cattle maintained with the intragastric infusion technique (Orskov et al., 1979). The urinary recovery of exogenous purines has been estimated to be 0.77-0.85 (Chen et al., 1990a, Verbic et al., 1990), and this relationship has been assumed to be applicable to normal feeding situations. To our knowledge there is no data to support or reject this approach. This study examined the urinary recovery of exogenous allantoin input in steers under normal feeding conditions.

Urinary recovery of allantoin in normally fed steers

1998 ◽  
Vol 1998 ◽  
pp. 80-80
Author(s):  
F. Herrera Gomez ◽  
F. D. Deb Hovell ◽  
C. A. Sandoval Castro
Keyword(s):  
Urinary Excretion ◽  
Recovery Factor ◽  
Purine Derivatives ◽  
Urinary Recovery ◽  
Host Animal ◽  
N Supply ◽  
Normal Feeding ◽  
The Relationship ◽  
Infusion Technique ◽  
Microbial N

Studies in the use of the purine derivatives technique in ruminants have been stimulated by the possible use of this technique as an estimator of the rumen microbial-N supplied to the host animal. The recovery factor influences the estimation of the total purines absorbed and therefore the microbial-N supply. The relationship between exogenous purine input and urinary excretion and recovery has been studied using cattle maintained with the intragastric infusion technique (Orskov et al., 1979). The urinary recovery of exogenous purines has been estimated to be 0.77-0.85 (Chen et al., 1990a, Verbic et al., 1990), and this relationship has been assumed to be applicable to normal feeding situations. To our knowledge there is no data to support or reject this approach. This study examined the urinary recovery of exogenous allantoin input in steers under normal feeding conditions.

Variations in the urinary excretion of purine derivatives and creatinine in holstein/friesan dairy cattle

1995 ◽  
Vol 1995 ◽  
pp. 18-18
Author(s):  
K.J. Shingfield ◽  
N.W. Offer ◽  
A.M. Sword
Keyword(s):  
Urinary Excretion ◽  
Urine Volume ◽  
Microbial Protein ◽  
Purine Derivatives ◽  
Urinary Creatinine ◽  
Spot Urine ◽  
Non Invasive ◽  
Invasive Method ◽  
Total Urine ◽  
Suitable Index

The urinary excretion of purine derivatives has been proposed as a non-invasive method of estimating the outflow of rumen microbial protein. Wider application of this technique is hindered by the requirement for a total urine collection, but Chen et al. (1992) suggested the use of urinary Creatinine(C) concentration to account for changes in urine volume. The relative concentrations of Purine Derivatives (PD) and C in spot urine samples could be used as a suitable index of PD output. The following experiment assesses the validity of this approach in lactating Holstein/Friesan cattle.

The relationship between microbial N synthesis and urinary excretion of purine derivatives in Dorper×thin-tailed Han crossbred sheep

2013 ◽  
Vol 112 (1-3) ◽  
pp. 49-55 ◽  
Author(s):  
Tao Ma ◽  
Kaidong Deng ◽  
Chenggang Jiang ◽  
Yan Tu ◽  
Naifeng Zhang ◽  
...  
Keyword(s):  
Urinary Excretion ◽  
Purine Derivatives ◽  
The Relationship ◽  
Microbial N

Enhancing Video Capsule Endoscopy: Location and Bleeding Detection

2010 ◽  
Author(s):  
Douglas Yeung ◽  
Amir Sabet Sarvestani ◽  
Jonathan Yap ◽  
Yuri Inoue
Keyword(s):  
Small Intestine ◽  
Small Bowel ◽  
Capsule Endoscopy ◽  
Cost Reduction ◽  
Video Capsule Endoscopy ◽  
Non Invasive ◽  
Elapsed Time ◽  
Bleeding Detection ◽  
Invasive Method ◽  
Intuitive User Interface

Video capsule endoscopy (VCE) is a non-invasive method of visually examining the internal lumen of small intestine for inflammation and bleeding through a wireless camera contained in a small capsule. Currently, VCE technology is limited because it cannot map images to their specific locations in the small bowel. Furthermore, approximately 40% of identified problem areas are false positives, making bleeding difficult to find. Therefore, physicians can only estimate the location of inflammation and bleeding areas based on the elapsed time before performing a wired endoscopy. Our pill camera offers an innovative wireless imaging GPS-like location system, in an easy to swallow pill that accurately identifies and displays bleeding areas within the small intestine through an intuitive user interface, which results in a 50% reduction in clinical times, as well as improved diagnosis for potential investors and providers, thus resulting in a $500 cost reduction in physician fees per patient.

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