pith


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Related to pith: pith helmet

pith

(pith),
1. The center of a hair.
2. The spinal cord and medulla oblongata.
3. To pierce the medulla of an animal with a sharp instrument introduced at the base of the skull.
[A.S. pitha]

pith

(pĭth)
n.
a. The soft inner substance of a feather or hair.
b. The spinal cord.
tr.v. pithed, pithing, piths
To sever or destroy the spinal cord of, usually by inserting a needle into the vertebral canal.

pith

(pith)
1. The center of a hair.
2. The spinal cord and medulla oblongata.
3. To pierce the medulla of an animal with a sharp instrument introduced at the base of the skull.
[A.S. pitha]

pith

or

medulla

the core of a DICOTYLEDON stem, containing PARENCHYMA cells that have a storage function.
References in periodicals archive ?
A comprehensive analysis of the MC indicated that average initial MC was affected by the tree harvesting season and pith location.
Then 1-inch-thick boards were sawn parallel to the pith from each cant outward to 4 inches from the pith, with the middle board centered on the pith.
For certain species, such as plantation teak, a modified sawing pattern could be used to eliminate large objectionable pith centers.
These measurements were made to obtain the radial variation in the GA from the pith to the bark and to verify measurements made on trees and on logs.
In the end, Pointy Shoes and Pith Helmets is a valuable contribution to the study of Ambonese, Indonesian, and colonial history that fascinates from beginning to end.
The mean value of the TL gradually increased up to the 18th annual ring from the pith, and then it showed an almost constant value (Fig.
After the abovementioned parameters were determined, the effective degradability of DM, NDF, and ADF in whole plant, leaf blade, leaf sheath, stem rind, stem pith, stem node, ear husk, and tassel of corn stover were calculated using the equation described by 0rskov and McDonald (1979) as follows:
Pith helmets come in different shapes from various regiments.
Therefore, it appears that the gas production parameters and degradability of sugarcane pith by rumen microbial fractions are influenced by low temperature steam and sulfuric acid treatment, bacterial group generates a larger volume of gas production than fungal or protozoan group and this method had no negative effect on rumen microorganisms.
The severity and type of damage lowering the internal quality of log (i.e., color defects and/or decay) were classified into 5 grades: 1 = no damage (no visible color defects or decay); 2 = color defect in pith with a diameter <20 mm (slight color change); 3 = hard rot in pith with a diameter <20 mm (clear color change, usually as a result of chemical reaction or preliminary stage of decay); 4 = hard rot (the wood material dark but still hard, a condition caused by an infection related to a decaying fungus); 5 = soft rot (wood material is dark and soft, and wears away when scratched) (see Schatz et al.
These cores often contain the pith, or center of the log, which doesn't accept pressure treatment as well.