dead knot

dead knot

A knot that has lost its fibrous connection with the surrounding wood; it can easily loosen and fall out or be knocked out.
References in periodicals archive ?
But in breast cancer cells, there is no coordinated transcription site pairing, the DNA loops become tangled and the entire gene complex shuts down in a dead knot.
Limited Tenders are invited for Supply of Seasoned timber planks of IInd class hard wood (KIKKAR) free from dead Knot, cracks and warping of following sizes :
The effect of errors in dead knot border radial position was less pronounced but still substantial for higher error levels, while errors in knot rotational position could be neglected even for the highest magnitudes of error tested.
Limited Tenders are invited for Supply of Seasoned timber planks of IInd class hard wood (CHEED WOOD) free from dead Knot, cracks and warping of following sizes : Size of Timbers
This area is almost exclusively located around sound knots, whose fibers are intergrown with the wood fibers of the stem, compared with a dead knot, which is not connected to the normal wood in the same fashion.
Figure 3a shows an image that contains a dead knot as a principal object and two pockets as secondary defects in the upper left part of the image.
The following 10 defect categories were considered, plus clear wood: birds eye & freckle, bark & pitch pockets, wane, split, blue stain, stain, pith, dead knot, live knot, and hole.
The remaining parameters represent the distance from the pith to the end of the knot in mm (I), the distance from the pith to the dead knot border in mm (J), and the distance from the pith to the outer face of the log at the point where the knot axis intersects the outer face (K).
Knots can be divided to two basic types, sound (live) knots and dead knots.
Dead knots have dark rings, which are formed from bark around the branch when the tree was young.
Logs 3, 7, 10, and 11 were all small logs (SED less than 200 mm) containing dead knots of at least 30 mm in diameter.