TOTAL NONSTRUCTURAL CARBOHYDRATES IN FORAGES BY SEMIAUTOMATED ANALYSIS

Nonstructural Carbohydrates in Cool-season Grasses

Semiautomated spectrophotometry of total phospholipids in plasma.

A one-stage semiautomated method for estimating total phospholipids in plasma is reported. The phospholipids are extracted into aqueous ethanol, combined with a Lewis acid, and the change in pH is monitored colorimetrically. The method, compared with the acid digestion method of Gomori [J. Lab. Clin. Med. 27, 955 (1942)], gives results that are about 0.25 mmol/liter lower, but seems to be a sui...

Determination of Total Available Carbohydrates in Plants.

The estimation of carbohydrates plays an important part in both pure and applied plant physiology. While satisfactory methods of extracting and determining the individual types of carbohydrates are available, the complete fractionation of these is a tedious process. Furthermore, for many purposes of a more applied nature the determination of the total available carbohydrate content is of greate...

Lignin-carbohydrate complexes in forages: structure and consequences in the ruminal degradation of cell-wall carbohydrates.

Lignin-carbohydrate complexes (LCCs) are recognised as key structures in forage degradability. Apart from ester bonds involving phenolic acids, which seem to play a major role in grasses, little is known about the other types of linkages that must exist but have proved difficult to demonstrate. The chemical nature of possible LCC linkages is presented and the various mechanisms through which LC...

Methods of Analysis for Nitrate in Forages

Recently, much of the U.S. has been under drought conditions. Lack of water has limited the availability and quality of normal forages. In addition, livestock producers have often been forced to utilize alternative roughage sources. During normal years, nitrate-nitrogen (NO3-N) is taken up by plants and quickly converted to protein. When forages grow under drought stress, however, they tend to ...