INFLUENCE OF PHENOLIC ACIDS ON FORAGE STRUCTURAL CARBOHYDRATE DIGESTION

1984 ◽  
Vol 64 (5) ◽  
pp. 50-51 ◽  
Author(s):  
H. G. JUNG ◽  
G. C. FAHEY JR.
Keyword(s):  
Tall Fescue ◽  
Phenolic Acid ◽  
Acid Content ◽  
Coumaric Acid ◽  
Cellulose Digestion ◽  
Hemicellulose Degradation ◽  
Structural Carbohydrate ◽  
Ferulic Acids ◽  
Carbohydrate Digestion

p-Coumaric acid (PCA) and ferulic acid (FA) inhibit cellulose digestion in vitro, whereas PCA stimulates hemicellulose degradation. Acid concentrations increase in tall fescue during maturation but remain stable in alfalfa. Hemicellulose and cellulose digestion by sheep is associated with phenolic acid content of tall fescue but not of alfalfa. Key words: p-Coumaric and ferulic acids, hemicellulose and cellulose digestion

scholarly journals Phenolic acid content and in vitro antioxidant capacity of einkorn water biscuits as affected by baking time

2020 ◽  
Author(s):  
Juan Edgar Santa Cruz Olivos ◽  
Ivano De Noni ◽  
Alyssa Hidalgo ◽  
Andrea Brandolini ◽  
Volkan Arif Yilmaz ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Phenolic Acids ◽  
Phenolic Acid ◽  
Acid Content ◽  
Antioxidant Compounds ◽  
Unknown Compound ◽  
Cereal Products ◽  
Heat Damage ◽  
Conjugated Compounds

AbstractAim of this research was to study the evolution of heat damage, phenolic acid content and in vitro antioxidant capacity of whole meal einkorn water biscuits baked at 205 °C for increasing times (10 min steps) from 25 to 75 min. The heat damage was gauged by determining furosine, hydroxymethylfurfural (HMF), furfural and glucosylisomaltol (GLI) contents. Furosine increased up to 50 min baking, when HMF started to form; furfural augmented only after 65 min treatment, whereas GLI did not change. An unknown compound, apparently related to the severity of the heat load, aroses through the aldolic condensation of HMF with the acetone used for the extraction of phenolic acids; hence the use of acetone-based solvents in thermally processed cereal products should be avoided. The conjugated phenolic acids ferulic, vanillic, syringic, p-coumaric, p-hydroxybenzoic and syringaldehyde and the bound phenolic acids ferulic, p-coumaric, syringic, and p-hydroxybenzoic were identified in water biscuits. The stronger heating treatments led to an increase of the soluble conjugated compounds, but did not influence the bound fraction. The in vitro antioxidant capacity of water biscuits augmented significantly as baking time increased, likely for the formation of antioxidant compounds as a consequence of heat damage.

Assessment of Phenolic Acid Content and In Vitro Antiradical Characteristics of Hawthorn

2011 ◽  
Vol 14 (6) ◽  
pp. 664-669 ◽  
Author(s):  
Nilgün Öztürk ◽  
Muzaffer Tunçel
Keyword(s):  
Phenolic Acid ◽  
Acid Content

Phenolic acids in the fibre of some tropical grasses, effect on feed quality, and their metabolism by sheep

1993 ◽  
Vol 44 (5) ◽  
pp. 1123 ◽  
Author(s):  
JB Lowry ◽  
EA Sumpter ◽  
CS McSweeney ◽  
AC Schlink ◽  
B Bowden
Keyword(s):  
Cell Wall ◽  
Phenolic Acids ◽  
Hippuric Acid ◽  
Nitrogen Loss ◽  
Sinapic Acid ◽  
Coumaric Acid ◽  
Tropical Grasses ◽  
Dry Matter Loss ◽  
Ferulic Acids

A feature of the composition of dry-season tropical grasses, which may in part account for their lower digestibility, is the relatively high content of hydroxycinnamic acids covalently bound in the cell wall. The main phenolic acids liberated on mild alkaline hydrolysis in 19 species of native and introduced grasses in North Queensland were p-coumaric and ferulic acids, with the former predominating in 16 species. Caffeic acid was found in three species and sinapic acid in trace amounts. Total acids occurred at approximately 10 g/kg in most species, but were found at 50 g/kg in one species. When five of the species were fed as the sole diet to sheep, intake and digestibility were not clearly related to phenolic acid level in the diet. However, output of hippuric acid in the urine increased with the daily dietary intake of phenolic acids, and nitrogen excreted as hippurate was equivalent to as much as 17% of the total nitrogen in the diet. The effect of free acids on rumen function was tested by adding p-coumaric and ferulic acid directly to the diet. In contrast to the implications of numerous in vitro studies, intake and digestibility were not affected. Dry matter loss from intraruminal nylon bags was also not affected by administration of these compounds. In addition to hippuric acid, cinnamoylglycine was identified as a urinary metabolite. This appeared in animals on most of the grass diets, and was enhanced following administration of ferulic or p-coumaric acid, but not benzoic acid. It seems that phenolic acids liberated from the cell wall are unlikely to have an adverse effect on rumen microbial metabolism, but impose a serious nitrogen loss for animals on diets already deficient in nitrogen.

The effect of non-structural carbohydrate on in vitro first order disappearance kinetic of cellulose

2009 ◽  
Vol 2009 ◽  
pp. 177-177
Author(s):  
F Rezaii ◽  
M Danesh Mesgaran ◽  
A Heravi Moussavi
Keyword(s):  
Fatty Acid ◽  
Environmental Conditions ◽  
Volatile Fatty Acid ◽  
Cellulose Hydrolysis ◽  
Microbial Process ◽  
Cellulose Digestion ◽  
First Order ◽  
Structural Carbohydrate ◽  
The Impact

Ruminal cellulose digestion is a complex microbial process that involves adhesion of microbial cells to cellulose, cellulose hydrolysis, and fermentation of the resulting cellodextrins to volatile fatty acid, methane, and CO2 (Weimer, 1996). Information about how cellulose digestion and fermentation are affected by different ruminal environmental conditions is necessary to understand ruminant performance (Mourino, 2001). The aim of the present study was to elucidate the impact of type of supplemental non-structural carbohydrates (NSC) (starch and/or sucrose) on invitro first order disappearance kinetic of commercial cellulose (Cell).

Chemical quality, in vitro cellulose digestion, and yield of tall fescue forage affected by mefluidide

1981 ◽  
Vol 29 (6) ◽  
pp. 1158-1161 ◽  
Author(s):  
Scott Glenn ◽  
Barbara Glenn ◽  
Charles E. Rieck ◽  
Donald G. Ely ◽  
Lowell P. Bush
Keyword(s):  
Tall Fescue ◽  
Chemical Quality ◽  
Cellulose Digestion

scholarly journals EFFECT OF SULFUR SUPPLEMENTATION ON IN VITRO CELLULOSE DIGESTION AND ON NUTRIENT UTILIZATION AND NITROGEN METABOLISM OF LAMBS FED LOW QUALITY FESCUE HAY

1980 ◽  
Vol 60 (2) ◽  
pp. 337-344 ◽  
Author(s):  
C. M. GUARDIOLA ◽  
G. C. FAHEY Jr. ◽  
J. W. SPEARS ◽  
U. S. GARRIGUS
Keyword(s):  
Amino Acids ◽  
Tall Fescue ◽  
Sodium Sulfate ◽  
Rumen Fluid ◽  
Control Diet ◽  
Nutrient Utilization ◽  
Neutral Detergent Fiber ◽  
Sulfur Source ◽  
Cellulose Digestion

Experiments were conducted to determine the effects of supplementing low quality tall fescue hay, containing 0.26% total sulfur, with an iso-sulfurous quantity of either sodium sulfate or D,L-methionine. In vitro experiments were carried out where rumen fluid was collected from sheep fed a similar low quality tall fescue hay. In experiment 1, the addition of 1% urea to the low quality fescue ration stimulated in vitro cellulose digestion (P <.001). The addition of 0.05%, 0.10% and 0.15% sulfur from either sodium sulfate or methionine also stimulated cellulose digestion (P <.001) with no difference due to sulfur source. In experiment 2, the addition of 0.8% nitrate-N added as potassium nitrate depressed in vitro fescue cellulose digestion (P <.001) regardless of whether the donor sheep were adapted or unadapted to nitrate in the ration. Addition of sulfur appeared to overcome the depression in cellulose digestion due to nitrate. In vivo experiments involved the use of 12 crossbred female lambs (average initial weight, 34 kg) which were randomly assigned to one of three treatments (fescue, no added sulfur; fescue plus 0.15% sulfur as sodium sulfate; and fescue plus 0.15% sulfuras D,L-methionine). After completion of trial 1, lambs were re-randomized and the trial was replicated. Acid detergent fiber (ADF) and neutral detergent fiber (NDF) digestibilities were improved (P <.01) by supplemental sulfur, regardless of sulfur source. Nitrogen retention was not significantly affected by treatment. Essential amino acids, expressed as a percent of the total amino acids, were higher (P <.01) for lambs receiving the 0.15% sulfate-S diet. Molar percentage of methionine was increased (P <.01) by the addition of sulfur to the control diet whereas phenylalanine and glutamine concentrations decreased with sulfur addition. Serum taken from lambs fed 0.15% methionine-S contained more histidine (P <.05) while lambs fed 0.15% sulfate-S had less (P <.05) serum glycine.

Factors Influencing in Vitro Rumen Cellulose Digestion

1956 ◽  
Vol 15 (4) ◽  
pp. 1180-1187 ◽  
Author(s):  
C. N. Huhtanen ◽  
R.F. Elliott
Keyword(s):  
Cellulose Digestion ◽  
Factors Influencing

p-COUMARIC ACID CONTENT IN SWEET PEPPER UNDER FARMING METHODS

2016 ◽  
Vol 15 (8) ◽  
pp. 1841-1848
Author(s):  
Vasile Stoleru ◽  
Daniela Cristina Dimitriu ◽  
Andreia Corciova ◽  
Laurian Vlase ◽  
Teodor Stan ◽  
...  
Keyword(s):  
Acid Content ◽  
Sweet Pepper ◽  
Coumaric Acid
Sign in / Sign up

Export Citation Format

Share Document