scholarly journals In vitro digestion of bacterial and plant fructans and effects on ammonia accumulation in cow and sheep rumen fluids.

1998 ◽  
Vol 44 (2) ◽  
pp. 167-171 ◽  
Author(s):  
David R. Biggs ◽  
Kerrie R. Hancock
Keyword(s):  
In Vitro Digestion ◽  
Ammonia Accumulation ◽  
Sheep Rumen

In vitro studies on the effect of pH and of glucose on ammonia accumulation in the rumen of sheep

1959 ◽  
Vol 10 (1) ◽  
pp. 71 ◽  
Author(s):  
PJ Ries ◽  
RL Reid
Keyword(s):  
Casein Hydrolysate ◽  
Ammonia Production ◽  
Protein Nitrogen ◽  
Effect Of Ph ◽  
Nitrogen Levels ◽  
Ammonia Accumulation ◽  
Optimum Ph ◽  
Alkaline Side ◽  
Sheep Rumen

The effect of pH and of glucose on ammonia accumulation in rumen liquor, obtained from sheep rumen contents, was studied during 4-hr in vitro incubations. Control of pH over the range 4.5-7.3 was effected with sodium phosphate-citric acid buffer. Casein hydrolysate was added as a substrate for ammonia production. There was an optimum pH for ammonia accumulation which varied between 6.0 and 6 . 7 on different diets, and which appeared to be correlated with the range of pH normally encountered in the rumen on each diet. Ammonia accumulation fell rapidly on the acid side of the optimum pH and usually less rapidly on the alkaline side. This effect of pH is most probably due to an effect on ammonia production, i.e. an effect on deamination of amino acids. Glucose reduced ammonia accumulation to an extent greater than could be accounted for by the fall in pH due to the fermentation of glucose; protein nitrogen levels in the reaction mixture were significantly increased. It was concluded that the effect of glucose was due largely to a stimulation of ammonia utilization for synthesis of microbial protein and not to an inhibition of ammonia production.

scholarly journals Comparison of in vitro digestion of hays with horse caecal and sheep rumen fluids

1997 ◽  
Vol 37 (Suppl. 1) ◽  
pp. 57-58 ◽  
Author(s):  
D. Macheboeuf ◽  
M. Jestin ◽  
M. Chenost
Keyword(s):  
In Vitro Digestion ◽  
Sheep Rumen

scholarly journals Differential impact of Holder and High Temperature Short Time pasteurization on the dynamic in vitro digestion of human milk in a preterm newborn model

2020 ◽  
Vol 328 ◽  
pp. 127126 ◽  
Author(s):  
Stefano Nebbia ◽  
Marzia Giribaldi ◽  
Laura Cavallarin ◽  
Enrico Bertino ◽  
Alessandra Coscia ◽  
...  
Keyword(s):  
High Temperature ◽  
Human Milk ◽  
In Vitro Digestion ◽  
Preterm Newborn ◽  
Differential Impact ◽  
High Temperature Short Time ◽  
Short Time

Interaction between barley β-glucan and corn starch and its effects on the in vitro digestion of starch

2019 ◽  
Vol 141 ◽  
pp. 240-246 ◽  
Author(s):  
Hui Zhang ◽  
Zhi Li ◽  
Yanjun Tian ◽  
Zibo Song ◽  
Lianzhong Ai
Keyword(s):  
Corn Starch ◽  
In Vitro Digestion

scholarly journals Bovine Milk-Derived Emulsifiers Increase Triglyceride Absorption in Newborn Formula-Fed Pigs

Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 410 ◽  
Author(s):  
Kristine Bach Korsholm Knudsen ◽  
Christine Heerup ◽  
Tine Røngaard Stange Jensen ◽  
Xiaolu Geng ◽  
Nikolaj Drachmann ◽  
...  
Keyword(s):  
Milk Fat ◽  
Bovine Milk ◽  
In Vitro Digestion ◽  
Lipid Absorption ◽  
Lipid Digestion ◽  
Soy Lecithin ◽  
Neonatal Piglets ◽  
Milk Fat Globule Membranes

Efficient lipid digestion in formula-fed infants is required to ensure the availability of fatty acids for normal organ development. Previous studies suggest that the efficiency of lipid digestion may depend on whether lipids are emulsified with soy lecithin or fractions derived from bovine milk. This study, therefore, aimed to determine whether emulsification with bovine milk-derived emulsifiers or soy lecithin (SL) influenced lipid digestion in vitro and in vivo. Lipid digestibility was determined in vitro in oil-in-water emulsions using four different milk-derived emulsifiers or SL, and the ultrastructural appearance of the emulsions was assessed using electron microscopy. Subsequently, selected emulsions were added to a base diet and fed to preterm neonatal piglets. Initially, preterm pigs equipped with an ileostomy were fed experimental formulas for seven days and stoma output was collected quantitatively. Next, lipid absorption kinetics was studied in preterm pigs given pure emulsions. Finally, complete formulas with different emulsions were fed for four days, and the post-bolus plasma triglyceride level was determined. Milk-derived emulsifiers (containing protein and phospholipids from milk fat globule membranes and extracellular vesicles) showed increased effects on fat digestion compared to SL in an in vitro digestion model. Further, milk-derived emulsifiers significantly increased the digestion of triglyceride in the preterm piglet model compared with SL. Ultra-structural images indicated a more regular and smooth surface of fat droplets emulsified with milk-derived emulsifiers relative to SL. We conclude that, relative to SL, milk-derived emulsifiers lead to a different surface ultrastructure on the lipid droplets, and increase lipid digestion.

In vitro digestion of polysaccharides: InfoGest protocol and use of small intestinal extract from rat

2021 ◽  
Vol 140 ◽  
pp. 110054
Author(s):  
Pablo Gallego-Lobillo ◽  
Alvaro Ferreira-Lazarte ◽  
Oswaldo Hernández-Hernández ◽  
Mar Villamiel
Keyword(s):  
In Vitro Digestion ◽  
Small Intestinal

Black, green, and pink pepper affect differently lipid oxidation during cooking and in vitro digestion of meat

2021 ◽  
Vol 350 ◽  
pp. 129246
Author(s):  
Serena Martini ◽  
Alice Cattivelli ◽  
Angela Conte ◽  
Davide Tagliazucchi
Keyword(s):  
Lipid Oxidation ◽  
In Vitro Digestion
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