Effects of wood ash, calcium hydroxide and polyethylene glycol treatments on the nutrient availability and on the biological activity of tannins using gas production technique

2007 ◽  
Vol 2007 ◽  
pp. 220-220
Author(s):  
E.F. Nozella ◽  
I.C.S. Bueno ◽  
P.B. Godoy ◽  
D.M.S.S. Vitti
Keyword(s):  
Biological Activity ◽  
Polyethylene Glycol ◽  
Chemical Composition ◽  
Phenolic Compounds ◽  
Calcium Hydroxide ◽  
Nutrient Availability ◽  
Nutritive Value ◽  
Gas Production ◽  
Production Technique ◽  
High Alkalinity

Phenolic compounds, mainly tannins, depress the nutritive value of many feedstuffs. Tannins are hydrosoluble polymers which form complexes, essentially with proteins. These complexes are broken under conditions of high acidity (pH <3.5) or high alkalinity (pH =7.5). The aim of this work was to investigate the effects of different treatments on chemical composition and tannin bioassay of tanniniferous plants from the Northeast of Brazil.

In vitro gas production of foliage and fruits of forage trees with and without added PEG

2002 ◽  
Vol 2002 ◽  
pp. 137-137 ◽  
Author(s):  
R. Pinto Ruiz ◽  
CA Sandoval Castro ◽  
L. Ramírez Avilés
Keyword(s):  
Biological Activity ◽  
Local Knowledge ◽  
Nutritive Value ◽  
Gas Production ◽  
Natural Vegetation ◽  
Production Technique ◽  
Grazing Cattle ◽  
In Vitro Gas Production

In Chiapas, México, natural vegetation is often used for grazing cattle. Local knowledge identify several plants and fruits as been consumed by cattle, But few information is available on their nutritive value. The objective of the present work was to assess the potential nutritive value and biological activity of tannins in 14 materials by means of the in vitro gas production technique.

Effect of phenolic compounds in oak leaves (Quercus spp.) and PEG on gas production technique in sheep

2007 ◽  
Vol 2007 ◽  
pp. 219-219
Author(s):  
Mostafa Yousef Elahi ◽  
Yousef Rouzbehan
Keyword(s):  
Phenolic Compounds ◽  
Nutritive Value ◽  
Gas Production ◽  
Stable Complex ◽  
Production Technique ◽  
Oak Trees ◽  
Quercus Species ◽  
Ruminant Animals ◽  
Mountain Chain ◽  
High Level

Oak trees (Quercus spp.) are the main source of animal feedstuff in the forest areas of Zagros mountain chain in Iran. The leaves of oak contain high level of tannins particularly hydrolysable, which causes mortality in ruminant animals (Makkar, 2003). Polyethylene glycol (PEG) can form a stable complex with tannins, preventing the binding between tannins and dietary proteins (Makkar, 2003). Little information is available on the nutritive value of Quercus species (Q. persica and Q. infectoria). This study, therefore, is evaluating the chemical composition, phenolic compounds, organic matter digestibility (IVOMD) and metabolisable energy (ME) of these species with or without PEG using gas production technique in sheep.

Calorimetry, chemical composition and in vitro digestibility of sugarcane treated with calcium hydroxide

2018 ◽  
Vol 69 (4) ◽  
pp. 406
Author(s):  
Alexandre M. Dias ◽  
Luís C. V. Ítavo ◽  
Júlio C. Damasceno ◽  
Camila C. B. F. Ítavo ◽  
Geraldo T. Santos ◽  
...  
Keyword(s):  
Weight Loss ◽  
Chemical Composition ◽  
Calcium Hydroxide ◽  
Nutritive Value ◽  
Low Cost ◽  
Alkaline Treatment ◽  
In Vitro Digestibility ◽  
Cellulose Structure ◽  
High Dry Matter

Sugarcane is a source of roughage in animal feeding. It presents high production per unit of cultivated area, relatively easy cultivation and low cost of production per hectare, and better quality and a high dry matter (DM) yield in periods when forage is scarce. This study aimed to evaluate the effect of increasing levels of calcium hydroxide (Ca(OH)2) in sugarcane forage on chemical composition, in vitro digestibility values of DM, neutral detergent fibre (NDF) and acid detergent fibre (ADF), and kinetics of thermal decomposition processes of weight loss and heat flow. Sugarcane was collected close to the ground and 50-kg heaps of the fresh material were formed and mixed with four doses of Ca(OH)2 (0, 8, 16 and 24 g kg–1 sugarcane). Concentrations of NDF and ADF decreased linearly with increasing amount of Ca(OH)2, whereas concentration of hemicellulose increased linearly. In vitro digestibilities of DM, NDF and ADF were enhanced in a quadratic manner with increasing amounts of Ca(OH)2. The release of heat, measured by ΔH, increased linearly with increased Ca(OH)2 levels, likely due to enhanced digestibility of the fibre components. Weight loss decreased linearly between 272.2°C and 397.7°C with increased amounts of Ca(OH)2 added to sugarcane, likely due to changes in cellulose structure, which became denser and thermodynamically more stable than native cellulose following the alkaline treatment. Calcium hydroxide changed chemical composition and digestibility of the fibrous fraction of sugarcane, resulting in better nutritional value. The greatest release of heat and highest in vitro digestibility of fibre were observed when adding 15.2 g Ca(OH)2 kg–1 sugarcane; therefore, this dose is recommended to enhance the nutritive value of sugarcane as ruminant feed.

Use of the gas production technique to investigate the supplementation of nitrogen-deficient foods

1998 ◽  
Vol 22 ◽  
pp. 202-204
Author(s):  
C. D. Wood ◽  
N. S. Prathalingam ◽  
A. M. Murray ◽  
R. W. Matthewman
Keyword(s):  
Nutritive Value ◽  
Developed Countries ◽  
Gas Production ◽  
Protein Supplementation ◽  
Free Medium ◽  
Production Technique ◽  
Protein Supplements ◽  
North West ◽  
Rich Media

A major focus for improving the diets in many less developed countries (LDCS) is the provision of rumen fermentable nitrogen (N) using protein supplements to complement N-deficient foods. However, in vitro digestibility methods usually use N-rich environments for the degradation of single foods. This conventional approach may give data which do not reflect the nutritive value of the N-deficient diets often on offer in LDCS, neither is it appropriate for using in vitro gas production to study protein supplementation. Our earlier study indicated that, by using a N-free medium, the gas production technique responded to added ammonium sulphate and urea. The ADAS standardized methodology, which used 10 ml of inoculum instead of the 5 ml used in the earlier study, was found not to be very responsive to N supplementation. The ADAS methodology was therefore investigated in order to develop a modified protocol for fermenting foods in an N-limited environment. The study involved using inocula diluted to different extents in N-free medium for fermenting N-deficient substrates in N-free and N-rich media. The modified protocol was then used for investigating the interactions between N-rich and N-deficient foods from north-west India.

Tannin bioassay using semi-automated gas production technique

2005 ◽  
Vol 2005 ◽  
pp. 218-218
Author(s):  
E.F. Nozella ◽  
S.L.S. Cabral Filho ◽  
I.C.S. Bueno ◽  
P.B. Godoy ◽  
C. Longo ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Arid Regions ◽  
Animal Feed ◽  
Gas Production ◽  
Production Technique ◽  
Nutritional Factors ◽  
High Affinity ◽  
Nutritional Compounds ◽  
Phenolics Compounds

Brazil has arid regions where livestock production is limited by forage source. However, some native herbaceous browses have a dry tolerance and had been used as animal feed. Some of those plants have anti nutritional compounds such as tannins that can interfere on intake and digestibility. Tannins have a high affinity to proteins and could make these molecules unavailable for animal. Compounds as polyethylene glycol (PEG) has been used on tannin studies, because it has more affinity with tannins than proteins. Based on that, it is possible to evaluate the nutritive potential of tanniniferous plants, using PEG in gas based techniques for assessing anti nutritional factors in tanniniferous plants for ruminants. The aim of this work was to investigate the effects of different treatments (oven-, shade- and sun-drying and treatment with urea) on phenolics compounds and on the biological activity of tannins using the in vitro gas method with the addition of polyethylene glycol (PEG).

Evaluation of the nutritive value of maize silages using a gas production technique

2005 ◽  
Vol 123-124 ◽  
pp. 255-265 ◽  
Author(s):  
J.L. De Boever ◽  
J.M. Aerts ◽  
J.M. Vanacker ◽  
D.L. De Brabander
Keyword(s):  
Nutritive Value ◽  
Gas Production ◽  
Production Technique
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