Site of exoenzyme action in gastrointestinal tract of broiler chicks

Boros, D.; Marquardt, R. R.; Guenter, W.

doi:10.4141/a97-092

Cited by 19 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In chickens fed a wheat-based diet, the pH values of the digesta in the crop, the anterior small intestine and the posterior small intestine were 6.30, 6.50 and 7.27, respectively. Similar pH values have been reported in chickens fed a rye-based diet (Boros et al, 1998). However, buffers of different pH values may be used depending on the specific situation.…”

Section: 5supporting

confidence: 72%

Activity of phytate dephosphorylation in cereals, legumes and oilseeds determined by colourimetric and isotachophoretic method

Marounek¹,

Bubancová²,

Podsedníček³

et al. 2011

J. Anim. Feed Sci.

View full text Add to dashboard Cite

Activity of phytate dephosphorylation was determined in 26 samples of cereals, legumes, oilseeds and complete diets for poultry using the colourimetric and isotachophoretic method. The former method was based on the colour formed upon the reaction of molybdate with phosphate released from phytate. The latter method was based on measurement of decrease of phytate concentration in the reaction mixture. Rye had by far the highest phytate dephosphorylation activity, followed by wheat and wheat-containing diets. However, for most of the other samples, this activity was low. Phytate dephosphorylation activity as measured by capillary isotachophoresis was numerically lower than activity measured using the molybdate method; however, activities assayed by both methods correlated with statistical significance (r=0.86; P<0.001). The isotachophoretic method may be suitable for phytate dephosphorylation activity assay in feeds with a high content of inorganic phosphate and in samples of digesta and faeces.

show abstract

Section: 5supporting

confidence: 72%

Activity of phytate dephosphorylation in cereals, legumes and oilseeds determined by colourimetric and isotachophoretic method

Marounek¹,

Bubancová²,

Podsedníček³

et al. 2011

J. Anim. Feed Sci.

View full text Add to dashboard Cite

show abstract

“…This is somewhat surprising, since Sugawara et al 26 did not observe an increase in faecal content of bifidobacteria upon administration of an S‐AX preparation with a peak MM of 10 5 Da from corn husks at 10 g day −1 to human volunteers, suggesting that high‐MM AX have poor bifidogenic properties. It should be noted, however, that the chicken feeds used in the present study contained an added fungal endoxylanase preparation, which partially degrades AX in the small intestine 27. Hence the avDP of the S‐AX upon arrival in the large intestine is likely to be lower than that of the preparation itself.…”

Section: Discussionmentioning

confidence: 91%

Organic Chlorine as a Hydrogen‐Bridge Acceptor: Evidence for the Existence of Intramolecular OH⋅⋅⋅ClC Interactions in Somegem‐Alkynols

Banerjee

Desiraju

Mondal

et al. 2004

Chemistry A European J

View full text Add to dashboard Cite

The acceptor capabilities of "organic" halogen, CX (X=F, Cl, Br, I), with respect to hydrogen bonding are controversial, and unactivated organic chlorine is generally deemed to be a poor acceptor. Hydrogen bridges of the type O--H...Cl--C are uncommon and occur mainly in an intramolecular situation when the donor group is sterically hindered, so that the formation of intermolecular interactions is difficult. In this paper, intramolecular O--H...Cl--C interactions in a series of chloro-substituted gem-alkynols are studied. We describe various features of this interaction using crystallographic, spectroscopic and computational methods. The O--H...Cl--C interaction occurs in five of the six compounds under consideration here (CDDA, 14DDDA, 15DDDA, 18DDDA, 15MKA). Solution (1)H NMR spectroscopy shows that the interaction is intramolecular and that it is a true hydrogen bond. DFT calculations give a stabilisation energy around 4.0 kcal mol(-1). In the crystal structures of the compounds studied, the intramolecular O--H...Cl--C interactions fit into the overall scheme of cooperative interactions. These structures may be derived from that of the unsubstituted compound DDA by means of synthon exchange and the O--H...Cl--C interaction fares surprisingly well in the presence of competing stronger acceptors. The crystal structures show an unusual degree of modularity for compounds that generally form interactions that are weak and variable. It is noteworthy that the so-called "weak" acceptor, organic chlorine, is able to sustain a good intramolecular hydrogen bridge that is of an attractive and stabilizing nature and which is of potential importance in crystal engineering and supramolecular chemistry.

show abstract

“…Viscosity increased from the proximal to the distal digestive tract. This is probably due to the effect of the concentration of compounds that produce viscosity during the process of digestion or perhaps due to the increased hydration of those compounds (Boros et al, 1998). The main effect of enzyme supplementation on viscosity was not observed.…”

Section: Performance and Some Intestinal Functions Of Broilers Fed DImentioning

confidence: 91%

Performance and some intestinal functions of broilers fed diets with different inclusion levels of sunflower meal and supplemented or not with enzymes

Polovinski-Horvatović

Glamočić

Žikić

et al. 2015

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

Enzyme supplementation of diets enhances broiler performance by improving some of the basic production parameters such as average feed intake, feed conversion ratio, or average weight gain. The enzyme NSPase is commonly used in broiler diets containing high levels of viscous cereals such as barley, oat, wheat, or sorghum. The use of NSPase in diets with different levels of sunflower meal has been not been extensively explored. The experiment was carried out to evaluate the effects of the inclusion of sunflower meal levels in grower and finisher broiler diets supplemented or not with enzymes (cellulase, β-glucanase, and xylanase) on broiler performance, intestinal function, and carcass traits. A completely randomized experimental design, with 3*2 factorial arrangement with five replicates, was applied (1200 Ross 308 broilers). Sunflower meal inclusion and enzyme supplementation started in grower phase. Broiler performance significantly improved in grower phase (weight gain and feed conversion ratio) by enzyme supplementation, while the effect of sunflower meal was evident in finisher phase, when it significantly reduced weight gain. Sunflower meal increased ileal viscosity, and the interaction between diet and enzyme supplementation was statistically significant. Maltase activity was reduced with sunflower meal dietary inclusion, while enzyme supplementation had no effect either on maltase or sucrase activity. There were no any effects of sunflower meal inclusion with or without enzyme supplementation on carcass characteristics. It can be concluded that high inclusion of sunflower meal in broiler diets may impair broiler performance, but this may be overcome by enzyme supplementation. The effect of enzyme supplementation more evident in the grower phase than in the finisher phase.

show abstract

Site of exoenzyme action in gastrointestinal tract of broiler chicks

Cited by 19 publications

References 13 publications

Activity of phytate dephosphorylation in cereals, legumes and oilseeds determined by colourimetric and isotachophoretic method

Activity of phytate dephosphorylation in cereals, legumes and oilseeds determined by colourimetric and isotachophoretic method

Organic Chlorine as a Hydrogen‐Bridge Acceptor: Evidence for the Existence of Intramolecular OH⋅⋅⋅ClC Interactions in Somegem‐Alkynols

Performance and some intestinal functions of broilers fed diets with different inclusion levels of sunflower meal and supplemented or not with enzymes

Contact Info

Product

Resources

About