Effect of iron source on iron absorption by in situ ligated intestinal loops of broilers

2017 ◽  
Vol 57 (2) ◽  
pp. 308 ◽  
Author(s):  
Xiaofei Li ◽  
Lingyan Zhang ◽  
Liyang Zhang ◽  
Lin Lu ◽  
Xugang Luo
Keyword(s):  
Amino Acids ◽  
Absorption Rate ◽  
Iron Absorption ◽  
Protein Complexes ◽  
Absorption Kinetics ◽  
Main Site ◽  
Dependent Absorption ◽  
Kinetics Of ◽  
Menten Constant

Two experiments were conducted to investigate the effect of iron (Fe) source on Fe absorption by in situ ligated intestinal loops of broilers. In Experiment 1, in situ ligated intestinal loops from Fe-deficient chicks (29 days old) were perfused with solutions containing 0.45 mmol Fe/L from FeSO4 (FeSO4·7H2O), Fe-Gly chelate, Fe-Met chelate, one of three Fe-amino acid or protein complexes with weak, moderate or extremely strong complex strength (Fe-Met W, Fe-Pro M, or Fe-Pro ES), or the mixtures of FeSO4 with either Gly or Met (Fe + Gly or Fe + Met), respectively, up to 30 min. In Experiment 2, in situ ligated duodenal loops from Fe-deficient chicks (29 days old) were perfused with solutions containing 0–3.58 mmol Fe/L from FeSO4, Fe-Met W, Fe-Pro M, or Fe-Pro ES up to 30 min. The absorptions of Fe from both inorganic and organic Fe sources in the ligated duodenum were ~1.35–2.8 times higher (P < 0.05) than that in the ligated jejunum or ileum. The absorption of Fe as Fe-Pro M or Fe-Pro ES was higher (P < 0.05) than that of Fe as inorganic Fe or Fe-Met W at Fe concentration of 3.58 mmol/L. The absorption kinetics of Fe from organic and inorganic Fe sources in the ligated duodenal loops followed a saturable process as determined by regression analysis of concentration-dependent absorption rates. The maximum absorption rate and Michaelis–Menten constant values in the ligated duodenal loops were higher (P < 0.05) for Fe-Pro M and Fe-Pro ES than for FeSO4 and Fe-Met W. The results from this study indicate that the duodenum was the main site of Fe absorption in the intestines of broilers; organic Fe sources with stronger complex strength values showed higher Fe absorptions at a higher concentration of added Fe; and the simple mixture of FeSO4 with amino acids did not increase Fe absorption.

Size dependent absorption kinetics of sedimenting nanoparticles

2013 ◽  
Author(s):  
Manoranjan Ghosh ◽  
Karabi Ghosh ◽  
Seema Shinde ◽  
S. C. Gadkari
Keyword(s):  
Absorption Kinetics ◽  
Size Dependent ◽  
Dependent Absorption ◽  
Kinetics Of

Kinetics of iron absorption by in situ ligated small intestinal loops of broilers involved in iron transporters1

2016 ◽  
Vol 94 (12) ◽  
pp. 5219-5229 ◽  
Author(s):  
L. Y. Zhang ◽  
X. D. Liao ◽  
L. Y. Zhang ◽  
L. Lu ◽  
X. G. Luo
Keyword(s):  
Iron Absorption ◽  
Small Intestinal ◽  
Kinetics Of

Absorption kinetics of vitamin E nanoemulsion and green tea microstructures by intestinal in situ single perfusion technique in rats

2018 ◽  
Vol 106 ◽  
pp. 149-155 ◽  
Author(s):  
Rijuta Ganesh Saratale ◽  
Hee-Seok Lee ◽  
Yong Eui Koo ◽  
Ganesh Dattatraya Saratale ◽  
Young Jun Kim ◽  
...  
Keyword(s):  
Vitamin E ◽  
Green Tea ◽  
Absorption Kinetics ◽  
Perfusion Technique ◽  
Kinetics Of

Kinetic analysis of the intestinal iron absorption process in situ. The potential of vascularly autoperfused intestinal loops

1997 ◽  
Vol 16 (8) ◽  
pp. 425-428 ◽  
Author(s):  
G. Hunder ◽  
K. Osterloh ◽  
K. Schümann
Keyword(s):  
Blood Flow ◽  
Small Intestine ◽  
Iron Absorption ◽  
Binding Capacity ◽  
Iron Binding ◽  
Absorption Kinetics ◽  
Flow Rates ◽  
Intestinal Iron Absorption ◽  
Iron Binding Capacity

1 Blood sampling from mesenteric venules during absorption in situ is a useful tool to analyse intestinal absorption kinetics and prehepatic metabolism in different sections of the rat small intestine. By use of a micromanipulator, the method can be applied to the duodenum. This part of the small intestine shows the strongest adaptation of non-haem iron absorption to the demand for iron. 2 Iron absorption kinetics was linear in duodenal and jejunal segments. In iron-deficient animals, intestinal iron absorption capacity was increased in the duode num, while simultaneously determined galactose absorption showed no change. 3 In situ perfusion and cannulation of mesenteric venules in duodenal segments are described. The use of a micromanipulator permits varying the blood volume collected by changing the vertical angle between the cannula and the mesenteric vessel. 4 Intestinal iron absorption rates remained close to constant when blood flow rates were varied by a factor of about ten. Plasma concentrations of absorbed iron vs mesenteric blood flow rates followed a hyperbolic function, as the plasma concentration of absorbed iron in mesenteric venules increased to the same extent as the blood flow decreased. 5 As the plasma transferrin concentration did not change over the experimental period, the concentra tion of absorbed iron in the mesenteric plasma exceeded the iron-binding capacity of plasma trans ferrin at low blood flow rates. This observation shows that enhancement of intestinal iron absorption does not require a corresponding increase in plasma iron- binding capacity in the intestinal tissue. 6 Vascularly perfused gut loops were also used to measure prehepatic metabolism, which may influence organotropism of carcinogenic metabolites. Therefore, this type of preparation is likely to find a variety of toxicological applications.

Effects of Electroless Nickel on Hydrogen Absorption Properties of Zr-V-Fe Powders

2015 ◽  
Vol 815 ◽  
pp. 268-275
Author(s):  
Hang Cui ◽  
Jian Dong Cui ◽  
Yao Hua Xu ◽  
Hao Zhou ◽  
Jun Du
Keyword(s):  
Crystalline Phase ◽  
Hydrogen Absorption ◽  
Absorption Rate ◽  
Dynamic Method ◽  
Hydrogen Diffusion ◽  
Electroless Nickel ◽  
Absorption Kinetics ◽  
Absorption Properties ◽  
Absorption Performance ◽  
Kinetics Of

Nickel coated Zr-V-Fe non-evaporable getter (NEG) powders were prepared using electroless plating. The microstructure and composition of the Ni-coated Zr-V-Fe powders were analyzed by XRD, SEM and EDS. The hydrogen absorption performance of Ni-coated Zr-V-Fe powders and as-prepared powders were analyzed by dynamic method after an activation at 300°C for 2 hours. The hydrogen absorption performance of Ni-coated Zr-V-Fe powders and as-prepared powders at 100°C, 200°C, 300°C, 400°C, and 500°C were also analyzed. The results indicated that Ni existed as crystalline phase. The Ni coating played an important role as a catalyst which favored the dissociation of hydrogen on surface and Ni lowers the hydrogen diffusion energy for the Zr-V-Fe powders. The hydrogen absorption kinetics of Ni-coated Zr-V-Fe powders was improved in comparison with that of the as-prepared powders, and a relatively higher absorption rate was exhibited.

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